CN105939179A - System and method for monitoring input audio, broadcasting state and modulation amplitude of medium-wave transmitter - Google Patents
System and method for monitoring input audio, broadcasting state and modulation amplitude of medium-wave transmitter Download PDFInfo
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- CN105939179A CN105939179A CN201610452194.8A CN201610452194A CN105939179A CN 105939179 A CN105939179 A CN 105939179A CN 201610452194 A CN201610452194 A CN 201610452194A CN 105939179 A CN105939179 A CN 105939179A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 53
- 230000005236 sound signal Effects 0.000 claims abstract description 306
- 238000012545 processing Methods 0.000 claims abstract description 64
- 238000007781 pre-processing Methods 0.000 claims abstract description 17
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- 230000009286 beneficial effect Effects 0.000 description 9
- 238000013024 troubleshooting Methods 0.000 description 9
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/56—Arrangements characterised by components specially adapted for monitoring, identification or recognition covered by groups H04H60/29-H04H60/54
- H04H60/58—Arrangements characterised by components specially adapted for monitoring, identification or recognition covered by groups H04H60/29-H04H60/54 of audio
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/29—Arrangements for monitoring broadcast services or broadcast-related services
- H04H60/32—Arrangements for monitoring conditions of receiving stations, e.g. malfunction or breakdown of receiving stations
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Abstract
The invention provides a system and a method for monitoring an input audio, a broadcasting state and modulation amplitude of a medium-wave transmitter. The system comprises an intelligent switching module, a signal pre-processing module, an electronic volume control module and a monitoring processing module. The system for monitoring the input audio, the broadcasting state and the modulation amplitude of the medium-wave transmitter can switch and output audio signals with maximum authority and high-level signal state, can carry out audio amplitude adjustment automatically for to-be-broadcasted audio signals through an audio amplitude control signal to ensure the quality of the audio signals, can carry out real-time monitoring for the playing state of the medium-wave transmitter through a parallel mode which combines a wireless acquisition mode with a wired acquisition mode, and can give an alarming prompt in time when the medium-wave transmitter is in an abnormal broadcasting state, thereby removing faults, preventing broadcasting stopping accidents from occurring in the medium-wave transmitter, guaranteeing safe broadcasting and guaranteeing the quality of the broadcasted audio signals; and the system also can give an alarm remotely, is intelligent and convenient, and has relatively strong practicability.
Description
Technical field
The present invention relates to signal transmission technology field, be specifically related to medium wave transmitter input audio frequency, broadcast shape
State and modulation monitoring system and method.
Background technology
MW Transmitting Station mainly undertakes the relay task of central and provincial radio programmes, its signal source master
If satellite-signal, fiber-optic signal and microwave signal etc., it is ensured that the uninterrupted output of program is to broadcast electricity
It is particularly important from the point of view of platform.
When the signal broadcasted breaks down, need manually to switch it to into other signal of output,
Cannot ensure to switch in time, or the signal of switching also breaks down, it will broadcasting accident occurs, if
All signal all breaks down, or manual switching troubleshooting is not in time, it will occurs breaking accident, causes
Broadcasting is forced to interrupt, it is impossible to ensure safe broadcast.
It addition, while transmitter broadcasts audio signal, in addition it is also necessary to complete to ensure " the three of audio signal
Full " (full time, full power, full modulation degree) broadcast, but due to the instability of signal source and difference
Signal attenuation under environment, often produces impact to transmitter modulation, causes modulation differential mode, it may be assumed that
Ovennodulation or bad broadcast.Ovennodulation not only causes distorted signals, also transmitter is caused damage, the most then fall height
Pressure protection causes moment to break, heavy then cause burning out of the parts such as power amplifier in transmitter, directly contribute break with
Economic loss unnecessary.Bad broadcast, cause the degradation of signal audibility and broadcast quality, cause broadcasting
Accidents happened；Further, since transmitter broadcasts the adjustment of power not in time, transmitter can be made to broadcast power low
In the 80% of rated power, the situation of emergent power differential mode；The time period of broadcast singal is broadcasted at transmitter
In, if modulation degree differential mode or power differential mode occur, can cause transmitter within the described setting time period
Have no idea the broadcast of full time, it is impossible to complete broadcast plan, time of occurrence differential mode；If it is the most right
The power of medium wave transmitter, modulation degree and time state monitor and warning reminding, meeting in time timely
Cause troubleshooting not in time, and then cause occurring breaking accident, cause broadcasting to be forced to interrupt, it is impossible to ensure peace
Full broadcast.
Summary of the invention
The technical problem to be solved be just to provide medium wave transmitter input audio frequency, broadcast state with
Modulation monitoring system and method, it is possible to by monitoring the audio amplitude of multipath audio signal, broadcast
When the audio signal gone out breaks down, according to authority intelligence switching output audio signal；And can be by sending out
The modulated carrier signal penetrating machine output carries out real-time monitoring process, it is ensured that the full modulation degree of audio signal is broadcasted,
By the way of wireless collection and wired collection, the broadcast state of transmitter is carried out Real-time Collection monitoring, sentence
Whether disconnected transmitter there is broadcast differential mode, and reports to the police in time when occurring and broadcasting differential mode, it is to avoid occur
Broadcast accident.
According to one aspect of the present invention, it is provided that medium wave transmitter input audio frequency, broadcast state and amplitude modulation
Degree monitoring system, described system includes that intelligence handover module, signal pre-processing module, electronic sound volume control
Module and monitor processing module；
Described intelligence handover module, carries out turning for reception is provided with the multipath audio signal of authority order
Change process, and obtain the audio amplitude value of each road audio signal according to conversion process and described authority is suitable
Sequence, switching output one tunnel audio signal is to described signal pre-processing module；
Described signal pre-processing module, for using dynamic gain to the peak value of the described audio signal received
Mode carries out processing makes it maintain in the numerical range of setting, and by defeated for the audio signal after pretreatment
Deliver to described electronic sound volume control module；
Described electronic sound volume control module, for the audio amplitude control sent according to described monitor processing module
Signal processed carries out audio amplitude regulation to the described audio signal received, and by the audio signal after regulation
It is delivered to transmitter to broadcast；
Described monitor processing module, for according to transmitter broadcasts what information process obtained
The broadcast power of transmitter and amplitude modulation angle value, the broadcast monitoring state to transmitter, and according to institute
State amplitude modulation angle value and produce described audio amplitude control signal.
Medium wave transmitter input audio frequency, broadcast state and the tune provided in the present invention is provided
Amplitude monitoring system, it is possible to intelligence switching output authority is maximum and signal condition is the audio frequency of high level state
Signal, it is ensured that the uninterrupted broadcast of audio signal；And can be treated by audio amplitude control signal and broadcast
The audio signal gone out carries out audio amplitude regulation automatically, it is ensured that the quality of audio signal；It addition, pass through nothing
The parallel mode that line acquisition mode and wired acquisition mode combine, the broadcast state to medium wave transmitter
Monitor in real time, and when differential mode occurs broadcasting in medium wave transmitter, carry out warning reminding in time, thus
Carrying out troubleshooting, it is to avoid medium wave transmitter occurs breaking accident, it is ensured that safe broadcast, intelligence is convenient, practical
Property is stronger.
Further, described intelligence handover module specifically includes: holding wire allocation unit, for by reception
The multipath audio signal being provided with authority order carries out isolating and after Filtering Processing, being delivered to the first single-chip microcomputer
The input of chip and audio select unit；
Audio select unit, processes with monitoring for the multipath audio signal sending holding wire allocation unit
The audio signal that the transmitter that module sends receives is monitored；
First singlechip chip, is converted to often for the multipath audio signal of reception is carried out A/D respectively
The audio amplitude value of one tunnel audio signal also sends to amplitude display unit, and according to each road audio signal
Audio amplitude value determine each road Audio Meter state；
Audio switching unit, for according to described authority order and each road Audio Meter shape
State, the road audio signal that switching output authority is maximum and level state is high level；And in institute
When stating system malfunctions or power-off, straight-through any one road audio signal extremely described transmitter that exports is to enter
Row broadcasts；
Amplitude display unit, the audio frequency width of each road audio signal for the first singlechip chip is sent
The audio amplitude value of the audio signal that the transmitter that angle value and monitor processing module send receives shows；
Audio alarm unit, for the level that at least a road audio signal is corresponding in multipath audio signal
State is to report to the police during low level.
Use the beneficial effect of above-mentioned further scheme: can each according to the multipath audio signal received
Road audio amplitude value and default authority order, intelligence switching output authority is maximum and signal condition is high
The audio signal of level state, it is ensured that the uninterrupted broadcast of audio signal, and ensure the audio frequency matter broadcasted
Amount, it is to avoid broadcast accident occurs；And output audio signal is led directly to when system malfunctions or power-off,
Maintain the normal broadcast of transmitter, it is ensured that will not break because system equipment fault causes.
Further, described electronic sound volume control module includes high-fidelity dual pathways volume control chip and second
Singlechip chip, specifically for corresponding according to the ovennodulation received or undermodulation audio amplitude control signal
Reduce or increase the audio amplitude of audio signal, until the amplitude modulation angle value of described audio signal is in default
Normal amplitude modulation angle value in the range of, wherein, described audio amplitude control signal is pulse square wave signal.
Use the beneficial effect of above-mentioned further scheme: treat the sound of broadcast according to audio amplitude control signal
Frequently signal carries out audio amplitude regulation automatically, it is ensured that the broadcast quality of audio signal.
Further, described monitor processing module specifically includes: wired monitoring processing unit, for passing through
The modulated carrier signal that the transmitter of wired mode collection broadcasts processes, and obtains the broadcast merit of transmitter
The audio amplitude value that the audio signal of rate, amplitude modulation angle value and reception is corresponding, according to broadcasting power and amplitude modulation
The angle value broadcast monitoring state to transmitter, produces audio amplitude control signal always according to amplitude modulation angle value
And be delivered to electronic sound volume control module, and by audio amplitude value corresponding for the audio signal of transmitter reception
It is delivered to amplitude display unit；
Wireless monitor processing unit, for the field intensity information launching the transmitter wirelessly gathered
Process, obtain the audio signal broadcasting power, amplitude modulation angle value and reception of transmitter with corresponding
Audio amplitude value, according to broadcasting power and the amplitude modulation angle value broadcast monitoring state to transmitter, and will
The audio signal that transmitter receives is delivered to audio select unit and width respectively with corresponding audio amplitude value
Degree display unit；
Differential mode alarm unit, for carry out when transmitter occurs and broadcasts differential mode local acousto-optic interlink warning and
Remote alarms.
Use the beneficial effect of above-mentioned further scheme: the modulated carrier that can broadcast MW Transmitting Station is believed
Number carry out real-time monitoring process, produce audio amplitude control signal according to the amplitude modulation angle value of transmitter；And energy
Enough parallel modes combined by wireless collection mode and wired acquisition mode, to medium wave transmitter
Broadcast state monitors in real time, and when differential mode occurs broadcasting in medium wave transmitter, carries out warning in time and carry
Wake up, thus carry out troubleshooting, it is to avoid medium wave transmitter occurs breaking accident, it is ensured that safe broadcast, additionally it is possible to
Carry out remote alarms.
Further, described wired monitoring processing unit, specifically include: cymoscope, for collection
Modulated carrier signal is sampled, rectification and detection process, obtain transmitter modulation audio-frequency information and
Carrier information；
A/D converter, for calculating the modulation of transmitter according to described audio-frequency information and carrier information
It is worth, broadcasts the audio amplitude value that the audio signal of power and transmitter reception is corresponding；
High-speed microprocessor, for according to described amplitude modulation angle value determine the modulation condition of transmitter and calculate right
The modulation ratio value answered, and the power rating of transmitter is determined according to described broadcast power, and by transmitter
The audio amplitude value that the audio signal of reception is corresponding sends to amplitude display unit；
Volume increases square-wave generator, for when transmitter is in undermodulation state, produces pulse width
It is worth the undermodulation audio amplitude control signal corresponding with undermodulation ratio value；
Volume reduces square-wave generator, for when transmitter is in ovennodulation state, produces pulse width
It is worth the ovennodulation audio amplitude control signal corresponding with ovennodulation ratio value.
Use the beneficial effect of above-mentioned further scheme: transmitting can be determined according to the amplitude modulation angle value of transmitter
The modulation condition of machine also calculates the modulation ratio value of correspondence, and produce pulse width values and modulation ratio value
Corresponding undermodulation audio amplitude control signal or ovennodulation audio amplitude control signal, treat broadcast
The audio amplitude of audio signal be adjusted.
According to another aspect of the present invention, it is provided that medium wave transmitter input audio frequency, broadcast state and amplitude modulation
Degree monitoring method, said method comprising the steps of:
S1, intelligence handover module are provided with the multipath audio signal of authority order to reception to be carried out at conversion
Reason, and audio amplitude value and the described authority order of each road audio signal is obtained according to conversion process,
Switching output one tunnel audio signal is to signal pre-processing module；
The peak value of S2, the described signal pre-processing module described audio signal to receiving uses dynamic gain side
Formula carries out processing makes it maintain in the numerical range of setting, and the audio signal after pretreatment is carried
To described electronic sound volume control module；
The audio amplitude control signal docking that S3, electronic sound volume control module send according to monitor processing module
The described audio signal received carries out audio amplitude regulation, and is delivered to launch by the audio signal after regulation
Machine is to broadcast；
S4, described monitor processing module according to transmitter is broadcasted information process obtain send out
Penetrate broadcast power and the amplitude modulation angle value of machine, the broadcast monitoring state to transmitter, and according to described
Amplitude modulation angle value produces described audio amplitude control signal.
Beneficial effects of the present invention: in the present invention provide medium wave transmitter input audio frequency, broadcast state with
Modulation monitoring method, it is possible to intelligence switching output authority is maximum and signal condition is the sound of high level state
Frequently signal, it is ensured that the uninterrupted broadcast of audio signal；And can be treated by audio amplitude control signal
The audio signal broadcasted carries out audio amplitude regulation automatically, it is ensured that the quality of audio signal；It addition, pass through
The parallel mode that wireless collection mode and wired acquisition mode combine, the broadcast shape to medium wave transmitter
State monitors in real time, and when differential mode occurs broadcasting in medium wave transmitter, carries out warning reminding in time, from
And carrying out troubleshooting, it is to avoid medium wave transmitter occurs breaking accident, it is ensured that safe broadcast, and intelligence is convenient, real
Stronger by property.
Further, described S1 specifically includes: S11, the MCVF multichannel voice frequency letter being provided with authority order that will receive
After number carrying out isolation and Filtering Processing, carry out A/D respectively and be converted to the audio frequency of each road audio signal
Range value, and determine each road Audio Meter shape according to the audio amplitude value of each road audio signal
State；
S12, according to described authority order and each road Audio Meter state, switching output power
The road audio signal that limit is maximum and level state is high level state, and breaking down or during power-off
Straight-through any one road audio signal that exports is broadcasted to transmitter；
S13, the transmitter that audio amplitude value and the monitor processing module of each road audio signal send is connect
The audio amplitude value of the audio signal received shows, and an at least road audio frequency in multipath audio signal
The level state that signal is corresponding is to report to the police during low level；
S14, to sending out that multipath audio signal and the monitor processing module after isolation and Filtering Processing sends
The audio signal that machine of penetrating receives is monitored.
Use the beneficial effect of above-mentioned further scheme: can each according to the multipath audio signal received
Road audio amplitude value and default authority order, intelligence switching output authority is maximum and signal condition is high
The audio signal of level state, it is ensured that the uninterrupted broadcast of audio signal, and ensure the audio frequency matter broadcasted
Amount, it is to avoid broadcast accident occurs；And output audio signal is led directly to when system malfunctions or power-off,
Maintain the normal broadcast of transmitter, it is ensured that will not break because system equipment fault causes.
Further, described S3 specifically includes: according to the ovennodulation received or undermodulation audio amplitude control
Signal correspondence processed reduces or increases the audio amplitude of audio signal, until the modulation of described audio signal
Value is in the range of default normal amplitude modulation angle value, and wherein, described audio amplitude control signal is pulse
Square-wave signal.
Use the beneficial effect of above-mentioned further scheme: treat the sound of broadcast according to audio amplitude control signal
Frequently signal carries out audio amplitude regulation automatically, it is ensured that the broadcast quality of audio signal.
Further, described S4 specifically includes: the modulated carrier signal that S41, wired collection transmitter broadcast,
The field intensity information that wireless collection transmitter is launched simultaneously, carries out process to modulated carrier signal and obtains transmitter
Audio amplitude value corresponding to audio signal broadcasting power, amplitude modulation angle value and reception, and according to described
Amplitude modulation angle value produces described audio amplitude control signal；Field intensity information is processed and obtains transmitter and broadcast
Go out the audio signal of power, amplitude modulation angle value and reception and corresponding audio amplitude value；
S42, according to described broadcast power and the amplitude modulation angle value broadcast monitoring state to transmitter, and
Local acousto-optic interlink warning and remote alarms is carried out when transmitter occurs and broadcasts differential mode；
S43, by transmitter receive audio signal be delivered to described sound respectively with corresponding audio amplitude value
Frequently monitoring unit and amplitude display unit.
Use the beneficial effect of above-mentioned further scheme: the modulated carrier that can broadcast MW Transmitting Station is believed
Number carry out real-time monitoring process, produce audio amplitude control signal according to the amplitude modulation angle value of transmitter；And energy
Enough parallel modes combined by wireless collection mode and wired acquisition mode, to medium wave transmitter
Broadcast state monitors in real time, and when differential mode occurs broadcasting in medium wave transmitter, carries out warning in time and carry
Wake up, thus carry out troubleshooting, it is to avoid medium wave transmitter occurs breaking accident, it is ensured that safe broadcast, additionally it is possible to
Carry out remote alarms.
Further, described S41 specifically includes: S411, to gather modulated carrier signal be sampled,
Rectification processes with detection, obtains audio-frequency information and the carrier information of transmitter modulation, and according to described sound
Frequently information and carrier information calculate the amplitude modulation angle value of transmitter, broadcast power and the sound of transmitter reception
Frequently the audio amplitude value that signal is corresponding；
S412, determine the modulation condition of transmitter according to described amplitude modulation angle value and calculate the modulation ratio of correspondence
Example value, and when transmitter is in undermodulation state, produce pulse width values relative with undermodulation ratio value
The undermodulation audio amplitude control signal answered；When transmitter is in ovennodulation state, produce pulse width
It is worth the ovennodulation audio amplitude control signal corresponding with ovennodulation ratio value.
Use the beneficial effect of above-mentioned further scheme: transmitting can be determined according to the amplitude modulation angle value of transmitter
The modulation condition of machine also calculates the modulation ratio value of correspondence, and produce pulse width values and modulation ratio value
Corresponding undermodulation audio amplitude control signal or ovennodulation audio amplitude control signal, treat broadcast
The audio amplitude of audio signal be adjusted.
Accompanying drawing explanation
Fig. 1 is the medium wave transmitter input audio frequency of the embodiment of the present invention one, broadcast state and modulation monitoring
System construction drawing；
Fig. 2 is the medium wave transmitter input audio frequency of the embodiment of the present invention one, broadcast state and modulation monitoring
The circuit structure diagram of the intelligent handover module in system；
Fig. 3 is the medium wave transmitter input audio frequency of the embodiment of the present invention one, broadcast state and modulation monitoring
The structure chart of the wired monitoring processing unit in system；
Fig. 4 is the medium wave transmitter input audio frequency of the embodiment of the present invention two, broadcast state and modulation monitoring
Method flow diagram.
Detailed description of the invention
Being described principle and the feature of the present invention below in conjunction with accompanying drawing, example is served only for explaining this
Invention, is not intended to limit the scope of the present invention.
Embodiment one, medium wave transmitter input audio frequency, broadcast state and modulation monitoring system.Tie below
The system that closing Fig. 1 to Fig. 3 provides the present invention is described in detail.
Seeing Fig. 1 to Fig. 3, the system that the present invention provides includes intelligence handover module, Signal Pretreatment mould
Block, electronic sound volume control module and monitor processing module.
Described intelligence handover module, carries out turning for reception is provided with the multipath audio signal of authority order
Change process, and obtain the audio amplitude value of each road audio signal according to conversion process and described authority is suitable
Sequence, switching output one tunnel audio signal is to described signal pre-processing module.
Concrete, described intelligence handover module specifically include holding wire allocation unit, audio select unit,
First singlechip chip, audio switching unit, amplitude display unit and audio alarm unit.
Described holding wire allocation unit, for carrying out the multipath audio signal being provided with authority order received
After isolation and Filtering Processing, it is delivered to input and the audio select unit of the first singlechip chip.
Concrete, MW Transmitting Station mainly undertakes the relay task of radio programmes, and its signal source is main
It is satellite-signal, fiber-optic signal and microwave signal etc., according to signal quality and reliability by MW Transmitting Station
The multipath audio signal setting audio signal authority order received, makees a road audio signal maximum for authority
For main road audio signal, other audio signal as standby road audio signal, described main road audio signal
Authority is more than the multichannel authority for road audio signal, and multichannel has different power equally for road audio signal
Limit, specifically can by multichannel for road audio signal be divided into first for road audio signal, second for road audio signal,
3rd for road audio signal etc., and the rest may be inferred.Described holding wire allocation unit is provided with authority by receive
The multipath audio signal of order carries out isolating and Filtering Processing, and isolates and will carry after Filtering Processing
Input and audio select unit to the first singlechip chip.
Described audio select unit, for the multipath audio signal sending holding wire allocation unit and monitoring
The audio signal that the transmitter that processing module sends receives is monitored.
Described first singlechip chip, specially STC12C5A60S2 chip, for the multichannel sound that will receive
Frequently signal carries out A/D respectively and is converted to the audio amplitude value of each road audio signal sending to amplitude and shows
Show unit, and determine each road Audio Meter state according to described audio amplitude value.
Concrete, described first singlechip chip receives passing through of described holding wire allocation unit transmission isolates
Multipath audio signal after process, and multipath audio signal is carried out full frequency band collection, obtain multichannel sound
Frequently the voice signal in persistent period of each road audio signal and each road audio signal in signal
The dwell interval time, and according to persistent period of each road audio signal and the dwell interval of voice signal
Time, obtain the audio amplitude of each road audio signal.The audio amplitude judging each road audio signal is
The no effective audio amplitude standard reaching to set, if described audio amplitude reaches described effective audio amplitude mark
Standard, then this audio signal is effective status, and level state corresponding to this audio signal is high level state,
Concrete, the audio amplitude in audio signal reaches described effective audio amplitude standard in a flash, this sound
Frequently signal is i.e. judged as effective status；If described audio amplitude is all not reaching within the time period set
Described effective audio amplitude standard, then this audio signal is disarmed state, and the electricity that this audio signal is corresponding
Level state is low level state.
Audio switching unit, for according to described authority order and each road Audio Meter shape
State, the road audio signal that switching output authority is maximum and level state is high level, and in institute
When stating system malfunctions or power-off, by using, passive impedance transformation is straight-through exports any one road audio frequency
Signal, to transmitter, maintains the normal broadcast of transmitter, will not break because system equipment fault causes.
Concrete, it is judged that whether described main road Audio Meter state is high level state, if so,
Then intelligence switching exports this main road audio signal, and lights the signal lights that described main road audio signal is corresponding；
If it is not, then according to the authority order intelligence switching output authority of standby road audio signal is maximum and level state is
One tunnel of high level state is for road audio signal, and lights the signal lights that described standby road audio signal is corresponding.
If described main road audio signal is effective status, then unconditional switching exports described main road audio signal, only
Have when described main road audio signal is disarmed state, just can switch output standby road audio signal, and be
Selecting audio signal in multichannel is for road audio signal is that effective status and authority Gao mono-tunnel are for road
Audio signal exports, and the most unconditionally switching output level state is effective status and the high audio frequency of authority
Signal.
Amplitude display unit, the audio frequency width of each road audio signal for the first singlechip chip is sent
The audio amplitude value of the audio signal that the transmitter that angle value and monitor processing module send receives is with colour bar
Form shows on a display screen, convenient observation.
Audio alarm unit, specially sound and light alarm, including alarm and electroluminescent lamp, in multichannel
The level state that in audio signal, at least a road audio signal is corresponding is to report to the police during low level.
Concrete, if audio signal Zhong You mono-tunnel or multipath audio signal are invalid described in the multichannel received
State, does not has all disarmed states, then carry out audible alarm, and records audio signal and become invalid shape
The time of state, remind person on duty to take emergency measures in time, prevent to break accident；If receiving many
The all disarmed states of audio signal described in road, then carry out sound and light alarm, and described audio switching unit
Being immediately switched to main road audio signal output state, wait that audio signal is recovered, the most a certain road audio frequency is believed
Number reverting to effective status, described audio switching unit switches this road audio signal of output immediately, recovers sound
Frequently the output of signal.
As in figure 2 it is shown, multipath audio signal is delivered to the first monolithic movement by described holding wire allocation unit
The A/D of the P1.0-P1.3 of sheet changes input port, each road audio frequency letter that the first singlechip chip will receive
Number carry out A/D conversion with the frequency of 40KHZ, and according to the audio frequency of each road audio signal being converted to
Range value judges each road Audio Meter state, the most also the audio frequency width of each road audio signal
Angle value exports to described amplitude display unit by P0.1-P0.7 and P2.0-P2.7 delivery outlet,
The output of P0.1-P0.7 delivery outlet is audio amplitude Value Data, and the output of P2.0-P2.7 delivery outlet is sound
Frequently the address that range value is corresponding.Audio amplitude value corresponding to each road audio signal is within the time period set
When (in the most continuous 25 seconds) are all not reaching to effective audio amplitude standard, the first singlechip chip is sentenced
This audio signal fixed is disarmed state, and level state corresponding to this audio signal is low level state, and
Output signal to described audio alarm unit by P2.6-P2.7 pin report to the police.
Level state that each road audio signal is corresponding and the P1.4-P1.7 output valve of the first singlechip chip it
Between relation as follows: (1) as long as described system reset or when starting main road audio signal normal, first
The P1.4 foot output high level of singlechip chip, described audio switching unit keeps output main road audio frequency letter
Number；(2) when main road audio signal is lost, as long as first is normal for road audio signal, the first monolithic movement
The P1.5 foot output high level of sheet, the switching output of described audio switching unit first for road audio signal,
Once main road audio signal recovers normal, described audio switching unit unconditional switchback output main road sound immediately
Frequently signal；(3) if main road and first is all lost for road audio signal, the P1.6 of the first singlechip chip
Foot output high level, the switching output of described audio switching unit second for road audio signal, once main road or
Person first recovers normal for road audio signal, and described audio switching unit is according to described authority order, immediately
Unconditional switchback output main road or first is for road audio signal；(4) if main road and first, second is for road
Audio signal is all lost, the P1.7 foot output high level of the first singlechip chip, described Audio conversion list
Unit's switching output the 3rd is for road audio signal, and once main road, first or second are just recovering for road audio signal
Often, described audio switching unit according to described authority order, immediately unconditional switchback output main road, first
Or second for road audio signal；(5) four tunnel audio signals are all lost, and described audio alarm unit is carried out
Sound and light alarm, described audio switching unit switchback main road audio signal output state, waiting signal recovers,
The most a certain road audio signal is recovered, and described audio switching unit switches to that of audio signal recovery immediately
Road, recovers audio signal output.(6) any road audio signal is lost, and described audio alarm unit is all
Audible alarm can be sent, and tracer signal is lost or recovery time.
Described signal pre-processing module, for using dynamic gain to the peak value of the described audio signal received
Mode carries out processing makes it maintain in the numerical range of setting, and by defeated for the audio signal after pretreatment
Deliver to described electronic sound volume control module.
Concrete, a described signal pre-processing module road audio frequency to the switching output of audio switching unit intelligence
Signal carries out pretreatment, i.e. slowly promotes the audio signal that peak value is too low, and too high to peak value
Audio signal carries out Fast Compression, prevents the toning that transmitter is caused by the big rise and big fall of audio signal peak
System or bad broadcast, uses dynamic gain mode that the peak value of audio signal is maintained at about+10dB.
Described electronic sound volume control module, for the audio amplitude control sent according to described monitor processing module
Signal processed carries out audio amplitude regulation to the described audio signal received, and by the audio signal after regulation
It is delivered to transmitter to broadcast.
Concrete, described electronic sound volume control module by high-fidelity dual pathways volume control chip (IC) and
Second singlechip chip forms, and described second singlechip chip is specially STC12C2052 chip and specifically uses
In reducing according to the ovennodulation received or undermodulation audio amplitude control signal correspondence or increasing audio frequency
The audio amplitude of signal, until the amplitude modulation angle value of described audio signal is in default normal amplitude modulation angle value
In the range of, wherein, described audio amplitude control signal is pulse square wave signal.Described electronic sound volume controls
Module can remain and meet transmitter when reducing and increase volume control signal to transmitter offer
The audio signal of qualified modulation.It addition, to described electronic sound volume control module input be that Vpp is
The audio signal of 10dB, can provide Vpp to be-4dB to+10dB to transmitter after audio amplitude regulation
Audio signal, this signal meets the modulation requirement of most of medium wave transmitter of domestic use.
Audio signal after amplitude adjusted can be flowed to main by described electronic sound volume control module respectively
Transmitter and standby transmitter, convenient when master transmitter breaks down, use standby transmitter to enter in time
The broadcast of row broadcast voice signal, it is ensured that the broadcast of the continuous safe of audio signal.
Concrete, the input of described electronic sound volume control module is specifically divided into volume and reduces input and sound
Amount increases input.
If transmitter modulation is in normal modulation state, the most do not carry out any conveying.
If transmitter modulation is in ovennodulation state, then ovennodulation audio amplitude control signal is delivered to
Volume reduces input, according to corresponding with the pulse width values of described ovennodulation audio amplitude control signal
Amplitude reduce the audio amplitude of audio signal, until peak value amplitude modulation angle value is less than the peak amplitude preset
During examination criteria value, stop conveying.Such as, if transmitter modulation is in ovennodulation state, then incited somebody to action
Modulating audio frequency amplitude control signal is delivered to volume and reduces input, reduces the amplitude of output audio signal,
If the pulse width of ovennodulation audio amplitude control signal is 1s, then the volume of audio signal reduces each second
1dB；If the pulse width of ovennodulation audio amplitude control signal is 2s, then the volume of audio signal is per second
Clock reduces 2dB；If the pulse width of ovennodulation audio amplitude control signal is 3s, then the sound of audio signal
Measuring and reduce 3dB each second, by that analogy, i.e. the pulse width values of ovennodulation audio amplitude control signal is more
Greatly, the amplitude of corresponding audio frequency regulation is the biggest；Until described peak value amplitude modulation angle value is less than described amplitude detection
During standard value, stop immediately reducing input conveying ovennodulation audio amplitude control signal to described volume.
If transmitter modulation is in undermodulation state, then undermodulation audio amplitude control signal is delivered to
Volume increases input, according to corresponding with the pulse width values of described undermodulation audio amplitude control signal
Amplitude increase the audio amplitude of audio signal, until peak value amplitude modulation angle value is more than the peak amplitude preset
During standard value, or when average amplitude modulation value is more than the average amplitude standard value preset, stop conveying.Such as,
If transmitter modulation is in undermodulation state, then undermodulation audio amplitude control signal is delivered to volume
Increase input, increase the amplitude of output audio signal, if the pulse of undermodulation audio amplitude control signal
Width is 1s, then the volume of audio signal increases 1dB each second；If undermodulation audio amplitude control signal
Pulse width be 2s, then the volume of audio signal increases 2dB each second；If undermodulation audio amplitude control
The pulse width of signal processed is 3s, then the volume of audio signal increases 3dB each second, by that analogy, i.e.
The pulse width values of undermodulation audio amplitude control signal is the biggest, and the amplitude of corresponding audio frequency regulation is the biggest；
During until peak value amplitude modulation angle value is more than described peak amplitude standard value, or average amplitude modulation value is flat more than described
All during amplitude criteria value, stop increasing input conveying undermodulation audio amplitude to described volume immediately and control
Signal.
Described transmitter receives the audio signal that described electronic sound volume control module sends, and to described audio frequency
Signal obtains the carrier signal through ovennodulation after processing, and broadcasts.
Described monitor processing module, for according to transmitter broadcasts what information process obtained
The broadcast power of transmitter and amplitude modulation angle value, the broadcast monitoring state to transmitter, and according to institute
State amplitude modulation angle value and produce described audio amplitude control signal.
Concrete, described monitor processing module specifically includes wired monitoring processing unit, wireless monitor processes
Unit and differential mode alarm unit.
Described wired monitoring processing unit, modulated for what the transmitter gathered by wired mode was broadcasted
Carrier signal processes, and obtain transmitter broadcasts the sound that power, amplitude modulation angle value and transmitter receive
Frequently the audio amplitude value that signal is corresponding, enters the broadcast state of transmitter with amplitude modulation angle value according to broadcasting power
Row monitoring, produces described audio amplitude control signal always according to described amplitude modulation angle value and is delivered to electronic sound volume
Control module, and audio amplitude value corresponding to audio signal received by transmitter be delivered to described amplitude and show
Show unit.
Described monitor processing module also includes high-frequency signal switching switch, is opened by the switching of described high-frequency signal
The modulated carrier signal that the master transmitter worked or standby transmitter broadcast can be delivered to by pass
Described wired monitoring processing unit.Master transmitter is when broadcasting modulated carrier signal, and described high-frequency signal is cut
Changing switch switching and be connected to described master transmitter, standby transmitter is when broadcasting modulated carrier signal, described
High-frequency signal switching switch switching is connected to described standby transmitter.
Concrete, as it is shown on figure 3, described wired monitoring processing unit specifically includes cymoscope, A/D turns
Parallel operation, high-speed microprocessor, volume increase square-wave generator and volume reduces square-wave generator.
Described cymoscope is receiving collection by high frequency cable signal and high-frequency signal switching switch
After the modulated carrier signal that master transmitter or standby transmitter broadcast, described modulated carrier signal is carried out
The monitoring in real time such as sampling, rectification, detection processes, and obtains audio-frequency information and the carrier wave letter of transmitter modulation
Breath, described A/D converter calculates the tune of transmitter according to the audio frequency of transmitter modulation and carrier information
Range value, broadcast the audio amplitude value that audio signal that performance number and transmitter receive is corresponding, and by it
All being delivered to high-speed microprocessor, described high-speed microprocessor calculates the wink of transmitter according to described amplitude modulation angle value
Time amplitude modulation angle value, peak value amplitude modulation angle value and preset time period in average am depth value, and according to drawing
Peak value amplitude modulation angle value and average am depth value determine the modulation condition of transmitter and calculate correspondence
Modulation ratio value, described volume increases square-wave generator or volume reduces square-wave generator according to described tune
Ratio value processed produces described audio amplitude control signal, and is delivered to electronic sound volume control module；Described height
Speed single-chip microcomputer judges the power rating of transmitter according to the broadcast performance number obtained, and is connect by described transmitter
The audio amplitude value that the audio signal of receipts is corresponding is delivered to described amplitude display unit.At described wired monitoring
Reason unit also includes coding type keyboard, convenient operation.
Concrete, if described peak value amplitude modulation angle value is more than the amplitude monitoring standard value of regulation, described high speed list
Sheet machine then determines that transmitter modulation is in ovennodulation state, calculates ovennodulation ratio value and sends to institute
Stating volume and reduce square-wave generator, described volume reduces square-wave generator and produces pulse width values and described mistake
The ovennodulation audio amplitude control signal that modulation ratio value is corresponding, and send to the control of described electronic sound volume
Module.
If the peak amplitude standard value that described peak value amplitude modulation angle value both less than sets in setting the time period, or
The average amplitude standard value that average amplitude modulation value described in person both less than sets in setting the time period, described high speed
Single-chip microcomputer then determines that transmitter modulation is in undermodulation state, calculates undermodulation ratio value and sends extremely
Described volume increases square-wave generator, and described volume increases square-wave generator and produces pulse width values with described
The undermodulation audio amplitude control signal that undermodulation ratio value is corresponding, and send to described electronic sound volume control
Molding block.
If described peak value amplitude modulation angle value is in described amplitude monitoring standard value and described peak amplitude standard value
Between time, described high-speed microprocessor then determines that transmitter modulation is in normal modulation state, corresponding tune
Ratio value processed is zero, and generation pulse width is the low level of zero.
If there is ovennodulation state or undermodulation state, described high-speed microprocessor then determines that transmitter occurs
Modulation degree differential mode, and record the time that modulation degree differential mode occurs.
It addition, produce the audio amplitude control signal that pulse width values is corresponding with described modulation ratio value,
The audio amplitude of the size and generation that specifically refer to ovennodulation ratio value or undermodulation ratio value controls letter
Number the size of pulse width values corresponding, i.e. ovennodulation ratio value or undermodulation ratio value is the biggest,
The pulse width values of the audio amplitude control signal produced is the biggest, ovennodulation ratio value or undermodulation ratio
Example value the least, the pulse width values of the audio amplitude control signal of generation is the least, if modulation ratio value
It is zero, produces the audio amplitude control signal that pulse width is zero, be low level.
Described high-speed microprocessor judges whether described broadcast performance number is less than setting power value, if being less than, then
Determine medium wave transmitter emergent power differential mode, and recording power differential mode time of occurrence.Concrete, launching
The actual broadcast power of machine be more than its nominal power more than 80%, described high-speed microprocessor judge transmitter as
Full power is broadcasted, if the actual broadcast power of transmitter is less than described nominal power less than 80%, described height
Speed single-chip microcomputer then judges transmitter emergent power differential mode, and recording power differential mode time of occurrence.
It addition, the broadcast differential mode of medium wave transmitter specifically refer to transmitter broadcast broadcast singal time occur time
Between at least two in differential mode, power differential mode and modulation degree differential mode.If medium wave transmitter is broadcasting broadcast
In the setting time period of signal, modulation degree differential mode or power differential mode occur, it is determined that medium wave transmitter goes out
Differential mode between Xian Shi.Concrete, within 24 hours of medium wave transmitter regulation normal broadcast time,
Such as if a transmitter 6:00 in morning starts playing out 22:00 sign-off in evening, this portion is sent out
The broadcast " full time " penetrating machine is 16 hours, if medium wave transmitter broadcasts within these 16 hours
Doing well is the most all that normal modulation state and full power are broadcasted, the most do not occur modulation degree differential mode and
Power differential mode, then judge that the transmitter full time broadcasts, complete broadcast plan, do not have time of occurrence differential mode,
Broadcast for " full time "；If within the time period, there is modulation degree differential mode or power differential mode in transmitter,
Then judge transmitter time of occurrence differential mode, do not complete broadcast plan.
Described wireless monitor processing unit, for wirelessly gathering the field intensity letter that transmitter is launched
Breath processes, and obtains the audio signal broadcasting power, amplitude modulation angle value and reception of transmitter with corresponding
Audio amplitude value, the broadcast state of transmitter is supervised with amplitude modulation angle value according to described broadcast power
Control, and the audio signal that transmitter receives is delivered to described audio select respectively with corresponding audio amplitude
Unit and amplitude display unit.
Concrete, described wireless monitor processing unit uses the mode receiver/transmitter of fixed frequency wireless receiving to send out
The field intensity information penetrated, and field intensity information is processed obtain the broadcast power of transmitter, amplitude modulation angle value with
And receive audio signal and corresponding audio amplitude value, calculate transmitter according to described amplitude modulation angle value
Average am depth value in instantaneous amplitude modulation angle value, peak value amplitude modulation angle value and preset time period, and according to
The peak value amplitude modulation angle value gone out and average am depth value determine the modulation condition of transmitter, according to described broadcast
Power determines the power rating of transmitter.The judgement of modulation degree differential mode, power differential mode and time differential mode is equal
The judgement of described wired monitoring processing unit is identical.In addition it is possible to looked into by keyboard or mouse input
Ask order extremely described wireless monitor processing unit, and transmit corresponding tune by RS-232 interface to host computer
Range value and power test data.
Differential mode alarm unit, for carry out when transmitter occurs and broadcasts differential mode local acousto-optic interlink warning and
Remote alarms.
Concrete, when differential mode occurs broadcasting in described transmitter, described differential mode alarm unit carries out this in time
Ground acousto-optic interlink warning, by sound and signal lamp, reminds staff's transmitter to occur broadcasting in time
Go out differential mode, take measures in time to carry out troubleshooting, it is to avoid the generation of broadcast accident.It addition, go out at transmitter
When now broadcasting differential mode, the content broadcasting differential mode is also sent out by differential mode alarm unit with the form of word or code
Deliver to specify mobile terminal, specifically refer to what when occurred is broadcasted differential mode with word or generation
The form of code sends to specifying mobile terminal, carries out remote alarms, and remote prompting staff's transmitter goes out
Now broadcast differential mode.
Embodiment two, medium wave transmitter input audio frequency, state of broadcasting monitor method with modulation.Tie below
The method that closing Fig. 4 provides the present invention is described in detail.
See Fig. 4, S1, intelligence handover module is provided with authority multipath audio signal sequentially and enters reception
Row conversion process, and obtain the audio amplitude value of each road audio signal and described power according to conversion process
Limit order, switching output one tunnel audio signal is to signal pre-processing module.
Concrete, described step S1 specifically includes following steps:
S11, by receive be provided with authority order multipath audio signal carry out isolation with Filtering Processing after,
Carry out A/D respectively and be converted to the audio amplitude value of each road audio signal, and believe according to each road audio frequency
Number audio amplitude value determine each road Audio Meter state.
Concrete, the multipath audio signal received is carried out full frequency band collection, obtains in multipath audio signal
The dwell interval of the voice signal in the persistent period of each road audio signal and each road audio signal
Time, and according to persistent period of each road audio signal and the dwell interval time of voice signal,
Audio amplitude to each road audio signal.Judge whether the described audio amplitude of each road audio signal reaches
To the effective audio amplitude standard set, if described audio amplitude reaches described effective audio amplitude standard,
Then this audio signal is effective status, and level state corresponding to this audio signal is high level state.
S12, according to described authority order and each road Audio Meter state, switching output power
The road audio signal that limit is maximum and level state is high level state, and breaking down or during power-off
Straight-through any one road audio signal that exports is broadcasted to transmitter.
Concrete, it is judged that whether described main road Audio Meter state is high level, the most then intelligence
Switching can export this main road audio signal, and light the signal lights that described main road audio signal is corresponding；If it is not,
Then according to the authority order intelligence switching output authority of standby road audio signal is maximum and level state is high electricity
One tunnel of level state is for road audio signal, and lights the signal lights that described standby road audio signal is corresponding.If institute
Stating main road audio signal is effective status, then unconditional switching exports described main road audio signal, only exists
When described main road audio signal is disarmed state, just can switch output standby road audio signal, and be many
Road is that effective status and authority Gao mono-tunnel are for road audio frequency for selecting audio signal in the audio signal of road
Signal exports, the most unconditionally switching output level state be effective status and authority high audio frequency letter
Number.It addition, breaking down or during power-off, the multipath audio signal of reception is led to by intelligence handover module
Cross the straight-through output of employing passive impedance transformation to broadcast to described transmitter.
S13, the transmitter that audio amplitude value and the monitor processing module of each road audio signal send is connect
The audio amplitude of the audio signal received shows, and an at least road audio frequency letter in multipath audio signal
Number corresponding level state is to report to the police during low level.
Concrete, by the transmitter of the audio amplitude value of each road audio signal with monitor processing module transmission
The audio amplitude value of the audio signal received shows on a display screen with the form of colour bar, convenient sight
Examine.If audio signal Zhong You mono-tunnel or multipath audio signal are disarmed state described in the multichannel received, do not have
There are all disarmed states, then carry out audible alarm, and record audio signal and become the time of disarmed state,
Remind person on duty to take emergency measures in time, prevent to break accident；If audio frequency described in the multichannel received
The all disarmed states of signal, then carry out sound and light alarm, and switch to main road audio signal output state,
Wait audio signal is recovered, and the most a certain road audio signal reverts to effective status, switches output the most immediately
This road audio signal, recovers the output of audio signal.
S14, to isolation with Filtering Processing after multipath audio signal and monitor processing module send
The audio signal that transmitter receives is monitored.
The peak value of S2, the described signal pre-processing module described audio signal to receiving uses dynamic gain side
Formula carries out processing makes it maintain in the numerical range of setting, and the audio signal after pretreatment is carried
To described electronic sound volume control module.
Concrete, a described signal pre-processing module road audio frequency to the switching output of audio switching unit intelligence
Signal carries out pretreatment, i.e. slowly promotes the audio signal that peak value is too low, and too high to peak value
Audio signal carries out Fast Compression, prevents the toning that transmitter is caused by the big rise and big fall of audio signal peak
System or bad broadcast, uses dynamic gain mode that audio signal peak is maintained at about+10dB.
The audio amplitude control signal docking that S3, electronic sound volume control module send according to monitor processing module
The described audio signal received carries out audio amplitude regulation, and is delivered to launch by the audio signal after regulation
Machine is to broadcast.
Concrete, reduce according to the ovennodulation received or undermodulation audio amplitude control signal correspondence or
Increase the audio amplitude of audio signal, until the amplitude modulation angle value of described audio signal is in default normal tune
In the range of range value, wherein, described audio amplitude control signal is pulse square wave signal.Described electronics
Audio signal after amplitude adjusted can be flowed to master transmitter and standby by volume control module respectively
Transmitter, convenient when master transmitter breaks down, use standby transmitter to carry out broadcast singal in time
Broadcast, it is ensured that the broadcast of continuous safe.The input of described electronic sound volume control module is specifically divided into sound
Amount reduces input and volume increases input.
Concrete, if transmitter modulation is in normal modulation state, the most do not carry out any conveying.
If transmitter modulation is in ovennodulation state, then ovennodulation audio amplitude control signal is delivered to
Volume reduces input, according to corresponding with the pulse width values of described ovennodulation audio amplitude control signal
Amplitude reduce the audio amplitude of audio signal, until peak value amplitude modulation angle value is less than the peak amplitude preset
During examination criteria value, stop conveying.
If transmitter modulation is in undermodulation state, then undermodulation audio amplitude control signal is delivered to
Volume increases input, according to corresponding with the pulse width values of described undermodulation audio amplitude control signal
Amplitude increase the audio amplitude of audio signal, until peak value amplitude modulation angle value is more than the peak amplitude preset
During standard value, or when average amplitude modulation value is more than the average amplitude standard value preset, stop conveying.
S4, described monitor processing module according to transmitter is broadcasted information process obtain send out
Penetrate broadcast power and the amplitude modulation angle value of machine, the broadcast monitoring state to transmitter, and according to described
Amplitude modulation angle value produces described audio amplitude control signal.
Concrete, described step S4 specifically includes following steps:
The modulated carrier signal that S41, wired collection transmitter broadcast, wireless collection transmitter is launched simultaneously
Field intensity information, modulated carrier signal is processed obtain the broadcast power of transmitter, amplitude modulation angle value with
And audio amplitude value corresponding to audio signal received, and produce described audio frequency width according to described amplitude modulation angle value
Degree control signal；Field intensity information is processed and obtains the broadcast power of transmitter, amplitude modulation angle value and connect
The audio signal received and corresponding audio amplitude value.
Described step S41 specifically includes following steps:
S411, the modulated carrier signal gathered is sampled, rectification and detection process, and obtain transmitter
The audio-frequency information of modulation and carrier information, and calculate transmitting according to described audio-frequency information and carrier information
The amplitude modulation angle value of machine, broadcast power and audio amplitude value that audio signal that transmitter receives is corresponding；
Concrete, gather, by wired mode, the modulated carrier signal that transmitter broadcasts, to described modulated load
The monitorings in real time such as ripple signal is sampled, rectification, detection process, and obtain audio-frequency information and the load of transmitter
Ripple information, and the audio-frequency information and carrier information according to transmitter calculate the amplitude modulation angle value of transmitter, broadcast
Go out the audio amplitude value that the audio signal of performance number and reception is corresponding, and calculate according to described amplitude modulation angle value
Go out the average am depth in the instantaneous amplitude modulation angle value of transmitter, peak value amplitude modulation angle value and preset time period
Value.
Use the field intensity information that the mode receiver/transmitter of fixed frequency wireless receiving is launched, and field intensity information is entered
Row processes and obtains broadcast power, amplitude modulation angle value and the audio signal of reception of transmitter and corresponding audio frequency
Range value, according to described amplitude modulation angle value calculate the instantaneous amplitude modulation angle value of transmitter, peak value amplitude modulation angle value with
And the average am depth value in preset time period.
S412, determine the modulation condition of transmitter according to described amplitude modulation angle value and calculate the modulation ratio of correspondence
Example value, and when transmitter is in undermodulation state, produce pulse width values relative with undermodulation ratio value
The undermodulation audio amplitude control signal answered；When transmitter is in ovennodulation state, produce pulse width
It is worth the ovennodulation audio amplitude control signal corresponding with ovennodulation ratio value.
Concrete, calculate the instantaneous amplitude modulation angle value of transmitter, peak value modulation according to described amplitude modulation angle value
Average am depth value in value and preset time period, and according to the peak value amplitude modulation angle value drawn and average
Amplitude modulation angle value determines the modulation condition of transmitter and calculates the modulation ratio value of correspondence, according to described modulation
Ratio value produces described audio amplitude control signal.
If described peak value amplitude modulation angle value is more than the amplitude monitoring standard value of regulation, it is determined that transmitter modulation
It is in ovennodulation state, calculates ovennodulation ratio value and produce pulse width values and described ovennodulation ratio
It is worth corresponding ovennodulation audio amplitude control signal.
If the peak amplitude standard value that described peak value amplitude modulation angle value both less than sets in setting the time period, or
The average amplitude standard value that average amplitude modulation value described in person both less than sets in setting the time period, it is determined that send out
The machine modulation of penetrating is in undermodulation state, calculates undermodulation ratio value and produces pulse width values with described
The undermodulation audio amplitude control signal that undermodulation ratio value is corresponding.
If described peak value amplitude modulation angle value is in described amplitude monitoring standard value and described peak amplitude standard value
Between time, it is determined that transmitter modulation is in normal modulation state, and corresponding modulation ratio value is zero,
And generation pulse width is the low level of zero.
If ovennodulation state or undermodulation state occur, it is determined that modulation degree differential mode occurs in transmitter, and
Record the time that modulation degree differential mode occurs.
It addition, produce the audio amplitude control signal that pulse width values is corresponding with described modulation ratio value,
The audio amplitude of the size and generation that specifically refer to ovennodulation ratio value or undermodulation ratio value controls letter
Number the size of pulse width values corresponding, i.e. ovennodulation ratio value or undermodulation ratio value is the biggest,
The pulse width values of the audio amplitude control signal produced is the biggest, ovennodulation ratio value or undermodulation ratio
Example value the least, the pulse width values of the audio amplitude control signal of generation is the least, if modulation ratio value
It is zero, produces the audio amplitude control signal that pulse width is zero, be low level.
Judge whether described broadcast performance number is less than setting power value, if being less than, it is determined that medium wave transmitter
Emergent power differential mode, and recording power differential mode time of occurrence.Concrete, in the actual broadcast merit of transmitter
Rate is more than its nominal power more than 80%, it is determined that transmitter is that full power is broadcasted, if the actual of transmitter is broadcast
Go out power and be less than described nominal power less than 80%, then judge transmitter emergent power differential mode, and record merit
Rate differential mode time of occurrence.
S42, according to described broadcast power and the amplitude modulation angle value broadcast monitoring state to transmitter, and
Local acousto-optic interlink warning and remote alarms is carried out when transmitter occurs and broadcasts differential mode.
Concrete, the broadcast differential mode of medium wave transmitter specifically refers to transmitter to be occurred when broadcasting broadcast singal
At least two in time differential mode, power differential mode and modulation degree differential mode.If medium wave transmitter is broadcasting extensively
In the setting time period broadcasting signal, modulation degree differential mode or power differential mode there is, it is determined that medium wave transmitter
Time of occurrence differential mode, does not complete broadcast plan；If modulation degree differential mode not occurring in setting the time period
And power differential mode, then judge that transmitter " full time " broadcasts, complete broadcast plan.
When differential mode occurs broadcasting in described transmitter, carry out local acousto-optic interlink warning in time, pass through sound
And signal lamp, remind staff's transmitter to occur broadcasting differential mode in time, take measures in time to carry out
Troubleshooting, it is to avoid the generation of broadcast accident.It addition, when differential mode occurs broadcasting in transmitter, also will broadcast different
The content of state sends to specifying mobile terminal with the form of word or code, specifically refers to when
What the broadcast differential mode occurred sends to specifying mobile terminal with the form of word or code, carries out remotely
Reporting to the police, remote prompting staff's transmitter occurs broadcasting differential mode.
S43, by transmitter receive audio signal be delivered to described sound respectively with corresponding audio amplitude value
Frequently monitoring unit and amplitude display unit.
Medium wave transmitter input audio frequency, broadcast state and modulation monitoring system and the side that the present invention provides
Method, it is possible to each road audio amplitude value and default authority according to the multipath audio signal received are suitable
Sequence, intelligence switching output authority is maximum and signal condition is the audio signal of high level state, and in system
Break down or straight-through output audio signal during power-off；And the modulation of transmitter can be monitored in real time
Value, and produce corresponding audio amplitude control signal, then according to described audio amplitude control signal pair
Audio signal to be broadcasted carries out audio amplitude regulation automatically, and by the audio signal after audio amplitude regulation
It is delivered to described transmitter to broadcast, it is ensured that the broadcast quality of audio signal；By wireless collection side
The parallel mode that formula and wired acquisition mode combine, modulation degree state, the power to medium wave transmitter
State and time state monitor in real time, and occur that modulation degree differential mode, power are different at medium wave transmitter
When state or time differential mode, carry out warning reminding in time, thus carry out troubleshooting, it is to avoid medium wave transmitter goes out
Now break accident, it is ensured that safe broadcast, it is ensured that the quality of the audio signal of broadcast；Can also carry out remotely
Reporting to the police, intelligence is convenient, and practicality is stronger.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all in the present invention
Spirit and principle within, any modification, equivalent substitution and improvement etc. made, should be included in this
Within bright protection domain.
Claims (10)
1. medium wave transmitter input audio frequency, broadcast state and modulation monitoring system, it is characterised in that
Described system includes
Intelligence handover module, signal pre-processing module, electronic sound volume control module and monitor processing module；
Described intelligence handover module, carries out turning for reception is provided with the multipath audio signal of authority order
Change process, and obtain the audio amplitude value of each road audio signal according to conversion process and described authority is suitable
Sequence, switching output one tunnel audio signal is to described signal pre-processing module；
Described signal pre-processing module, for using dynamic gain to the peak value of the described audio signal received
Mode carries out processing makes it maintain in the numerical range of setting, and by defeated for the audio signal after pretreatment
Deliver to described electronic sound volume control module；
Described electronic sound volume control module, for the audio amplitude control sent according to described monitor processing module
Signal processed carries out audio amplitude regulation to the described audio signal received, and by the audio signal after regulation
It is delivered to transmitter to broadcast；
Described monitor processing module, for according to transmitter broadcasts what information process obtained
The broadcast power of transmitter and amplitude modulation angle value, the broadcast monitoring state to transmitter, and according to institute
State amplitude modulation angle value and produce described audio amplitude control signal.
2. medium wave transmitter input audio frequency as claimed in claim 1, state of broadcasting monitor system with modulation
System, it is characterised in that described intelligence handover module specifically includes:
Holding wire allocation unit, for isolating the multipath audio signal being provided with authority order received
After Filtering Processing, it is delivered to input and the audio select unit of the first singlechip chip；
Audio select unit, processes with monitoring for the multipath audio signal sending holding wire allocation unit
The audio signal that the transmitter that module sends receives is monitored；
First singlechip chip, is converted to often for the multipath audio signal of reception is carried out A/D respectively
The audio amplitude value of one tunnel audio signal also sends to amplitude display unit, and according to each road audio signal
Audio amplitude value determine each road Audio Meter state；
Audio switching unit, for according to described authority order and each road Audio Meter shape
State, the road audio signal that switching output authority is maximum and level state is high level；And in institute
When stating system malfunctions or power-off, straight-through any one road audio signal extremely described transmitter that exports is to enter
Row broadcasts；
Amplitude display unit, the audio frequency width of each road audio signal for the first singlechip chip is sent
The audio amplitude value of the audio signal that the transmitter that angle value and monitor processing module send receives shows；
Audio alarm unit, for the level that at least a road audio signal is corresponding in multipath audio signal
State is to report to the police during low level.
3. medium wave transmitter input audio frequency as claimed in claim 1, state of broadcasting monitor system with modulation
System, it is characterised in that described electronic sound volume control module include high-fidelity dual pathways volume control chip and
Second singlechip chip, specifically for:
Reduce according to the ovennodulation received or undermodulation audio amplitude control signal correspondence or increase sound
Frequently the audio amplitude of signal, until the amplitude modulation angle value of described audio signal is in default normal amplitude modulation angle value
In the range of, wherein, described audio amplitude control signal is pulse square wave signal.
4. medium wave transmitter input audio frequency as claimed in claim 3, state of broadcasting monitor system with modulation
System, it is characterised in that described monitor processing module specifically includes:
Wired monitoring processing unit, for the modulated carrier broadcasting the transmitter gathered by wired mode
Signal processes, and the audio signal broadcasting power, amplitude modulation angle value and reception obtaining transmitter is corresponding
Audio amplitude value, according to broadcasting power and the amplitude modulation angle value broadcast monitoring state to transmitter, also
Produce audio amplitude control signal according to amplitude modulation angle value and be delivered to electronic sound volume control module, and will launch
The audio amplitude value that the audio signal of machine reception is corresponding is delivered to amplitude display unit；
Wireless monitor processing unit, for the field intensity information launching the transmitter wirelessly gathered
Process, obtain the audio signal broadcasting power, amplitude modulation angle value and reception of transmitter with corresponding
Audio amplitude value, according to broadcasting power and the amplitude modulation angle value broadcast monitoring state to transmitter, and will
The audio signal that transmitter receives is delivered to audio select unit and width respectively with corresponding audio amplitude value
Degree display unit；
Differential mode alarm unit, for carry out when transmitter occurs and broadcasts differential mode local acousto-optic interlink warning and
Remote alarms.
5. medium wave transmitter input audio frequency as claimed in claim 4, state of broadcasting monitor system with modulation
System, it is characterised in that described wired monitoring processing unit, specifically includes:
Cymoscope, for being sampled the modulated carrier signal gathered, rectification processes with detection, obtains
The audio-frequency information of transmitter modulation and carrier information；
A/D converter, for calculating the modulation of transmitter according to described audio-frequency information and carrier information
It is worth, broadcasts the audio amplitude value that the audio signal of power and transmitter reception is corresponding；
High-speed microprocessor, for according to described amplitude modulation angle value determine the modulation condition of transmitter and calculate right
The modulation ratio value answered, and the power rating of transmitter is determined according to described broadcast power, and by transmitter
The audio amplitude value that the audio signal of reception is corresponding sends to amplitude display unit；
Volume increases square-wave generator, for when transmitter is in undermodulation state, produces pulse width
It is worth the undermodulation audio amplitude control signal corresponding with undermodulation ratio value；
Volume reduces square-wave generator, for when transmitter is in ovennodulation state, produces pulse width
It is worth the ovennodulation audio amplitude control signal corresponding with ovennodulation ratio value.
6. medium wave transmitter input audio frequency, state of broadcasting monitor method with modulation, it is characterised in that
Said method comprising the steps of:
S1, intelligence handover module are provided with the multipath audio signal of authority order to reception to be carried out at conversion
Reason, and audio amplitude value and the described authority order of each road audio signal is obtained according to conversion process,
Switching output one tunnel audio signal is to signal pre-processing module；
The peak value of S2, the described signal pre-processing module described audio signal to receiving uses dynamic gain side
Formula carries out processing makes it maintain in the numerical range of setting, and the audio signal after pretreatment is carried
To described electronic sound volume control module；
The audio amplitude control signal docking that S3, electronic sound volume control module send according to monitor processing module
The described audio signal received carries out audio amplitude regulation, and is delivered to launch by the audio signal after regulation
Machine is to broadcast；
S4, described monitor processing module according to transmitter is broadcasted information process obtain send out
Penetrate broadcast power and the amplitude modulation angle value of machine, the broadcast monitoring state to transmitter, and according to described
Amplitude modulation angle value produces described audio amplitude control signal.
7. medium wave transmitter input audio frequency, state of broadcasting monitor method with modulation as claimed in claim 6,
It is characterized in that, described S1 specifically includes:
S11, by receive be provided with authority order multipath audio signal carry out isolation with Filtering Processing after,
Carry out A/D respectively and be converted to the audio amplitude value of each road audio signal, and believe according to each road audio frequency
Number audio amplitude value determine each road Audio Meter state；
S12, according to described authority order and each road Audio Meter state, switching output power
The road audio signal that limit is maximum and level state is high level state, and breaking down or during power-off
Straight-through any one road audio signal that exports is broadcasted to transmitter；
S13, the transmitter that audio amplitude value and the monitor processing module of each road audio signal send is connect
The audio amplitude value of the audio signal received shows, and an at least road audio frequency in multipath audio signal
The level state that signal is corresponding is to report to the police during low level；
S14, to sending out that multipath audio signal and the monitor processing module after isolation and Filtering Processing sends
The audio signal that machine of penetrating receives is monitored.
8. medium wave transmitter inputs audio frequency, broadcasts state and modulation monitoring side as claimed in claim 6
Method, it is characterised in that described S3 specifically includes:
Reduce according to the ovennodulation received or undermodulation audio amplitude control signal correspondence or increase sound
Frequently the audio amplitude of signal, until the amplitude modulation angle value of described audio signal is in default normal amplitude modulation angle value
In the range of, wherein, described audio amplitude control signal is pulse square wave signal.
9. medium wave transmitter inputs audio frequency, broadcasts state and modulation monitoring side as claimed in claim 8
Method, it is characterised in that described S4 specifically includes:
The modulated carrier signal that S41, wired collection transmitter broadcast, wireless collection transmitter is launched simultaneously
Field intensity information, modulated carrier signal is processed obtain the broadcast power of transmitter, amplitude modulation angle value with
And audio amplitude value corresponding to audio signal received, and produce described audio frequency width according to described amplitude modulation angle value
Degree control signal；Field intensity information is processed and obtains the broadcast power of transmitter, amplitude modulation angle value and connect
The audio signal received and corresponding audio amplitude value；
S42, according to described broadcast power and the amplitude modulation angle value broadcast monitoring state to transmitter, and
Local acousto-optic interlink warning and remote alarms is carried out when transmitter occurs and broadcasts differential mode；
S43, by transmitter receive audio signal be delivered to described sound respectively with corresponding audio amplitude value
Frequently monitoring unit and amplitude display unit.
10. medium wave transmitter inputs audio frequency, broadcasts state and modulation monitoring side as claimed in claim 9
Method, it is characterised in that described S41 specifically includes:
S411, the modulated carrier signal gathered is sampled, rectification and detection process, and obtain transmitter
The audio-frequency information of modulation and carrier information, and calculate transmitting according to described audio-frequency information and carrier information
The amplitude modulation angle value of machine, broadcast power and audio amplitude value that audio signal that transmitter receives is corresponding；
S412, determine the modulation condition of transmitter according to described amplitude modulation angle value and calculate the modulation ratio of correspondence
Example value, and when transmitter is in undermodulation state, produce pulse width values relative with undermodulation ratio value
The undermodulation audio amplitude control signal answered；When transmitter is in ovennodulation state, produce pulse width
It is worth the ovennodulation audio amplitude control signal corresponding with ovennodulation ratio value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610452194.8A CN105939179A (en) | 2016-06-21 | 2016-06-21 | System and method for monitoring input audio, broadcasting state and modulation amplitude of medium-wave transmitter |
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| CN201610452194.8A CN105939179A (en) | 2016-06-21 | 2016-06-21 | System and method for monitoring input audio, broadcasting state and modulation amplitude of medium-wave transmitter |
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Application publication date: 20160914 |