CN107702813A - Microspeaker controls thermometric integrating apparatus and method - Google Patents
Microspeaker controls thermometric integrating apparatus and method Download PDFInfo
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- CN107702813A CN107702813A CN201711080667.7A CN201711080667A CN107702813A CN 107702813 A CN107702813 A CN 107702813A CN 201711080667 A CN201711080667 A CN 201711080667A CN 107702813 A CN107702813 A CN 107702813A
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- G—PHYSICS
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
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Abstract
One kind control thermometric integrating apparatus, including wave filter, adder, power amplifier, extraction resistance, electric current and voltage filter, electric current and voltage integrator and arithmetic logic unit.Wave filter receives input signal and forms output signal, adder forms sum signal, extraction signal is formed so that Microspeaker sends voice signal through extracting resistance, and form coil thermal voltage signal, current filter filters out current signal by being captured in extraction signal, voltage filter is gone out to filter out voltage signal by coil thermal voltage signal acquisition, is filtered out current signal and is filtered out voltage signal respectively by integration with obtaining temperature signal after computing.
Description
Technical field
The present invention is provides a kind of Microspeaker control and the device and method of thermometric, especially with integrated circuit pair
The apparatus and method integrated with thermometric are controlled in Microspeaker.
Background technology
Microspeaker typically refers to be arranged in portable equipment, and size is within 15mm*15mm, and power output is less than 2
The loudspeaker of watt.Microspeaker can be applied to mobile phone, notebook computer or personal digital assistant etc. etc. in electronic product.
Refer to Fig. 1, Fig. 1 is the schematic diagram of the Microspeaker of prior art, loudspeaker device S generally by coil 100, magnet 200, raise one's voice
Device 300 and vibrating diaphragm 400 are formed.Fig. 1 is to use cassette coordinate system, the axles of XYZ tri- as shown in figure 1, reference axis original point position in loudspeaker
The a certain angle of device is positioned with facilitating.Vibrating diaphragm 400 and coil 100 form a flexible suspension system, after coil 100 is powered,
Under being driven in the magnetic field of magnet 200, vibrating diaphragm 400 can move back and forth (simple harmonic oscillation) in the Y direction, so as to promote air vibration, hair
Go out sound.
The principle of Microspeaker work is to change into acoustic energy via electric energy, but during conversion, due to coil 100
The reasons such as internal driving, cause electric energy to have part energy during changing into acoustic energy and dissipate in the form of heat, if hot
When amount can not dissipate out Microspeaker in real time, hot environment will be produced inside Microspeaker.In the composition of reality, coil
100 and vibrating diaphragm 400 be to be bonded together, when coil 100 has heat energy generation, heat will pass to vibrating diaphragm 400, may result in and shake
Film 400 is damaged or deformed, and causes the output waveform distortion of Microspeaker.Even permanent damage.Meanwhile coil 100 overheats
The permanent damage of magnet 200 can be caused.Therefore, it is necessary to be monitored to horn coil temperature in the Microspeaker course of work.
Prior art mentions one kind in loudspeaker coil temperature control mode.Prior art is except disclosing how temperature is controlled
System, the further description monitoring method of temperature.One resistor network is in parallel with loudspeaker, due to loudspeaker at different temperature
Have different resistance, via the change of the resistance of loudspeaker so that resistor network exports different voltage, voltage be transmitted to again ADC with
After temperature estimator, via temperature estimator voltage temperature change so that system learn sometime under coil temperature.Electricity
Resistance network can use favour, and this is formed with electric bridge or divider.Although this mode only can learn temperature via voltage can,
Be temperature and voltage correlation coefficient value it is relatively low, and the coefficient of variation is big, therefore it is inaccurate to obtain the mode of temperature using voltage；Again
Person, resistance in parallel can cause the loss of institute's input current on loudspeaker so that the tonequality that loudspeaker are reduced declines, therefore this skill
Requirement of the user that art can not meet to appreciate music to tonequality.And actually voltage is not revealed in the prior art yet
How temperature converts, and more causing can not judge to obtain the authenticity of temperature value.
A kind of temperature sensing circuit is disclosed in the prior art in another, using the coil measured in loudspeaker in the very first time
With the resistance under the second time, coordinate the temperature coefficient of voice coil loudspeaker voice coil material in itself, via can obtain for the second time after mathematical operation
The temperature of voice coil loudspeaker voice coil.Although prior art is to obtain voice coil temperature using resistance, the authenticity of temperature, sensor are had increased access to
The transient temperature measured can still include noise, cause obtained coil temperature still inaccurate；And temperature is to change for a long time
Process, if only obtaining instantaneous physical quantity come if obtaining temperature, acquired temperature is inaccurate.Furthermore each time
Measurement resistance inevitably causes current loss, therefore the tonequality that loudspeaker are reduced can still decline.
" background technology " paragraph is used only to explanation and understands present invention, therefore disclosed by " background technology " paragraph
Content may not form the known technology in art known to those of ordinary skill comprising some.In " background skill
Content disclosed by art " paragraph, the content or the one or more embodiment problems to be solved of the present invention is not represented, at this
Known or recognized by those of ordinary skill in art before patent application.
The content of the invention
In order to improve the missing mentioned by prior art, it is an object of the invention to provide a kind of control for Microspeaker
Thermometric integrating apparatus processed, can measure the temperature of Microspeaker coil, and Microspeaker will not be caused to go back original sound
The decline of tonequality.
The present invention also provides a kind of coil temperature method for measurement of Microspeaker, can accurate measurement Microspeaker center line
The temperature of circle.
For the above-mentioned purpose, the invention discloses one kind control thermometric integrating apparatus to include wave filter, for receiving calculator
The input signal transmitted, and will be filtered out in input signal with first frequency, to form output signal；Adder, to
Output signal and the marking signal in temperature measuring equipment are handled, and output signal and marking signal are summed to form sum signal；
Power amplifier, receive sum signal and will add up signal amplification；Resistance is extracted, receives the sum signal after amplification, and it is right
The current signal in sum signal after amplification is extracted, and extraction signal is sent into Microspeaker, Microspeaker
Receive and handle extraction signal to generate coil thermal voltage signal and send voice signal；Current filter, extracted for capturing
There is the part of second frequency in the electric current of signal, current signal is filtered out to be formed；Voltage filter, for filtering out coil thermoelectricity
Pressing has the part of second frequency in signal, voltage signal is filtered out to be formed；Current integrator, enter for current signal will to be filtered out
Row integration, and output current integrated signal；Voltage integrator, integrated for voltage signal will to be filtered out, and output voltage accumulates
Sub-signal；And arithmetic logic unit, current integration signal is received with after voltage integrating meter signal union, obtaining resistance signal,
Temperature signal is generated after resistance signal is handled again, and sends temperature signal to external device (ED).
According to above-mentioned purpose, the method for the invention for separately disclosing the coil temperature in a kind of measure Microspeaker, including under
Row step.Receive the input signal from calculator.The first frequency of the input signal is filtered out by wave filter, it is defeated to be formed
Go out signal.The output signal and marking signal phase adduction are formed into sum signal using adder.Sum signal is amplified, extraction
The electric current in sum signal is taken, to form extraction signal, extraction signal is believed to drive Microspeaker to generate coil thermal voltage
Number.By analog-digital converter by it is analog extraction signal and coil thermal voltage signal change into it is digital.Utilize current filtering
Device filters out the second frequency of extraction signal, and current signal is filtered out with generation.Coil thermal voltage signal is filtered out by voltage filter
Second frequency, with generation filter out voltage signal.To filtering out current signal and filtering out after voltage signal integrates, to generate electricity
Flow integrated signal and voltage integrating meter signal.Computing is carried out to current integration signal and voltage integrating meter signal, and generates resistance signal.
After being handled by resistance signal, temperature signal is generated.Temperature signal is transmitted to external device (ED).
Based on above-mentioned, embodiments of the invention have the second frequency by filtering out in extraction signal and coil thermal voltage signal
The part of rate, current signal and voltage signal is filtered out to be formed to filter out respectively, respectively to filtering out current signal and filtering out voltage letter
Number integration forms current integration signal and voltage integrating meter signal, by obtaining resistance to current integration signal and voltage integrating meter signal
Signal simultaneously generates temperature signal to obtain real-time coil temperature, reduces loudspeaker the distortion even chance of permanent damage.
Brief description of the drawings
Fig. 1 is the configuration diagram of the Microspeaker of prior art；
Fig. 2 is according to technology of the present invention, represents a kind of circuit block diagram for controlling thermometric integrating apparatus；
Fig. 3 is according to technology of the present invention, is represented in a kind of control thermometric integrating apparatus, another embodiment
Circuit block diagram；
Fig. 4 is according to technology of the present invention, is represented in a kind of control thermometric integrating apparatus, analog-digital converter
The process chart of prime；
Fig. 5 is according to technology of the present invention, is represented in a kind of control thermometric integrating apparatus, analog-digital converter
The process chart of rear class；And
Fig. 6 is according to technology of the present invention, represents first node to the waveform and signal schematic representation of the 5th node.
Embodiment
In order that the purpose of the present invention, technical characteristic and advantage, can more correlative technology field personnel understood, and be able to
Implement the present invention, coordinate appended schema herein, specifically illustrate the technical characteristic and embodiment of the present invention, and enumerate preferable reality
Apply example progress explanation., also need not be according to express the signal relevant with feature of present invention with the schema hereinafter compareed
Completely drawn according to practical situation.And it is related in the explanation on this case embodiment in technology well-known to those skilled in the art
Hold, also no longer stated.
Fig. 2 is refer to, Fig. 2 represents a kind of circuit block diagram for controlling thermometric integrating apparatus C.As shown in Fig. 2 control thermometric
Integrating apparatus C coupling calculators T1, Microspeaker 5 and external device (ED) T3.It is, for example, to have six to control thermometric integrating apparatus C
The chip (Fig. 2 does not show) of pin, one of pin coupling calculator T1, four pins couple Microspeaker 5, a pin
Couple external device (ED) T3.Control thermometric integrating apparatus C be for determining the coil temperature in Microspeaker 5 (Fig. 2 does not show), and
The Microspeaker is set to send voice signal.Calculator T1 can be PC, smart mobile phone, any to send message
The device of control signal all may be used.External device (ED) T3 can be a numerical digit displays temperature meter or a personal calculator
Or smart mobile phone.Wherein calculator T1, external device (ED) T3 and control thermometric integrating apparatus C connected mode can be USB marks
Accurate, I2C buses or wire jumper.Control thermometric integrating apparatus C and Microspeaker 5 connected mode pass through I2S buses.
Please continue to refer to Fig. 2, control thermometric integrating apparatus C includes wave filter 1, adder 2, power amplifier 3, extraction
Resistance 4, analog-digital converter 6, analog-digital converter 7, current filter 8, voltage filter 9, current integrator 10, electricity
Press integrator 11 and arithmetic logic unit 12.Wave filter 1 is incited somebody to action to receive the input signal transmitted from calculator T1
Filtered out in input signal with first frequency, to form output signal.The scope of wherein first frequency is, for example, more than 0 hertz,
To no more than 50 hertz.Filtering out the purpose of first frequency is, makes signal caused by waveform subsequent generator T2 not by calculator T1
The noise jamming included in input signal transmitted.Noise is typically mostly to be ensconced in the range of this first frequency, i.e., 0 hertz
More than, into the low-frequency range no more than 50 hertz.Adder 2 receives the output signal exported by wave filter 1 and waveform
The marking signal of generator T2 outputs, and output signal and marking signal are subjected to add operation, to form sum signal, and it is defeated
Go out to power amplifier 3.Add operation is carried out by adder 2.Adder 2 can be a full adder.In the present invention
Embodiment in, in follow-up voice signal and temperature signal, the marking signal of addition waveform generator T2 output
It is intended to, forms temperature signal for subsequent arithmetic, allowing has comparison basis when being subsequently formed temperature signal.Marking signal can be with
It is a clock signal, is via voluntarily caused signal inside control thermometric integrating apparatus C.It is noted that waveform produces
Signal caused by device T2 may still be mingled with the noise part of first frequency.In the embodiment of the present invention, mark
Coil impedance signal when signal can be 25 degree Celsius, a coil category temperature coefficient can also be included in.
Please continue to refer to Fig. 2, power amplifier 3 is receiving and amplify sum signal.In the specific embodiment party of the present invention
In formula, power amplifier 3 is most preferably to use AB power-like amplifiers, other as A classes, B classes, C classes and D-type power amplifier or its
His suitable power amplifier, which connects, is applicable to the present invention.Extract resistance 4 receive amplification after sum signal, and to amplification after
Current signal in sum signal is extracted, to form extraction signal.The function of extraction resistance is in extraction sum signal
Certain some physics is used so that subsequent arithmetic forms temperature signal.This extraction signal is sent to miniature raise by extraction resistance 4 again
Sound device 5, wherein the resistance value suggestion of extraction resistance 4 is 50 to 200 milliohms, it is preferred that 70 to 100 milliohms, in order to avoid extraction
Efficiency of the Resistance Influence to Microspeaker 5.Microspeaker 5 can send voice signal after receiving extraction signal, but because micro-
In type loudspeaker 5, the electric energy of big coil and the conversion efficiency of kinetic energy are not 100%, so while voice signal is sent,
Coil thermal voltage signal can be generated in the lump.In addition, it is the composition for containing original marking signal in this extraction signal.
Please continue to refer to Fig. 2, current filter 8 is filtered out with by the second frequency extracted in signal, and electric current is filtered out to be formed
Signal；Voltage filter 9 is used to filter out second frequency in coil thermal voltage signal, and formation filters out voltage signal.Herein second
The scope of frequency is, for example, 50 hertz to 20000 hertz, this current filter 8 and voltage filter 9 can will extraction signal with
The second frequency of coil thermal voltage signal partly filters out, and retains first frequency part, that is, retains more than 0 hertz and arrive no more than 50 hertz
In the range of hereby, allow it to truly reduce the voice signal sent in the Microspeaker 5, with the accurate thermometric of profit.
Current integrator 10 to filtering out current signal to integrate, and output current integrated signal, and voltage integrator 11 is to right
Voltage signal is filtered out to be integrated, and output voltage integrated signal.Because the change of temperature is a kind of slow process, therefore use
Current integrator 10 and voltage integrator 11, for carrying out integral operation to filtering out current signal, can obtain in a special time
The curtage signal relatively relaxed must be changed, compared with traditionally only in some particular point in time acquirement curtage signal
It is more objective.Voltage integrator 11 and current integrator 10 are to use traditional integrator, will filter out current signal with filtering out
The combination that voltage signal is made up of resistance, electric capacity and a preferable inverting amplifier respectively, with obtain filter out current signal with
Filter out voltage signal for the result after time integral computing.The scope now integrated is typically a specific time model
Enclose, if being ordered for 0 microsecond, herein with controlling thermometric integrating apparatus median filter to start the time of signal produced by receiving calculator T1
Time range be typically 10 microseconds between 20 microseconds.User's adjustable-voltage integrator 11 and component in current integrator 10
Resistance value and capacitance, to obtain the time of integration scope required for it.
Please continue to refer to Fig. 2, arithmetic logic unit 12 receives current integration signal and voltage integrating meter signal and is subject to computing,
To obtain resistance signal, arithmetic logic unit 12 obtains temperature signal after resistance signal is handled again, and transmits temperature letter
Number to external device (ED) T3, wherein external device (ED) T3 be, for example, thermometer of electronics temperature formula etc. can displays temperature value electronic installation.
The present invention does not limit external device (ED) T3 embodiment, and any device for producing human eye resolutive signal can all turn into outer
Part device T3.The computing that received current integration signal and voltage integrating meter signal are divided by by arithmetic logic unit 12.Calculate again
Number logic unit 12 is, for example, to perform the processing of following formula (1) and obtain temperature signal：
Wherein, the coil temperature that T is, RTIt is measured coil impedance under the coil temperature, R25It is at 25 degree Celsius
When coil impedance, TcoefIt is the coil category temperature coefficient under the coil temperature.R25With TcoefAll it is included in marking signal
In.RTConverted via coil thermal voltage signal.By the processing of formula (1), resistance signal is converted into needed for us
The temperature signal (coil temperature in i.e. above-mentioned formula (1)) wanted, to carry out the conversion of two physical quantitys.Follow-up arithmetic logic unit 12
Send temperature signal to display that external device (ED) T3 enters trip temperature, temperature signal is transformed into the readable signal of human eye.
It is worth noting that, the front end of current filter 8 and voltage filter 9 also sets up analog digital converting unit
(Analog to Digital Converter, ADC), including analog-digital converter 6 and analog-digital converter 7, simulate number
(Analog) of simulation can be extracted signal respectively with analog-digital converter 7 and be changed with coil thermal voltage signal by word converter 6
Into (Digital) extraction signal and coil thermal voltage signal of numeral.Analog-digital converter 6 is with analog-digital converter 7
Simplify the process of the computing of arithmetic logic unit 12 and extraction signal and coil thermal voltage signal are converted into back end current filtering
Device 8 and the readable form of voltage filter 9.
Then Fig. 2 and Fig. 3 be please also refer to, Fig. 3 is in this control thermometric integrating apparatus C, another embodiment
Circuit block diagram.Fig. 3 is that power amplifier 3, extraction resistance 4, Microspeaker 5 and Analog-digital Converter are captured from Fig. 2
The part of device 6,7, and the transmission of signal between these components is described in more detail.From figure 3, it can be seen that power amplifier 3 connects
After receiving the sum signal from adder 2, the sum signal of amplification is exported via two output ends, one of output end coupling
Microspeaker 5 is connected to, another output end is then coupled to Microspeaker 5 by extracting resistance 4.Microspeaker 5 receives
By the extraction signal of the sum signal that power amplifier 3 is amplified and extraction resistance 4, extraction signal driving Microspeaker 5 enters
Row work and send voice signal A, Microspeaker 5 processing extract signal after, can in the lump generate coil thermal voltage signal.Mould
Intend digital quantizer 6 two inputs be respectively coupled to extraction resistance 4 both ends, to capture extraction signal 4 electric current into
Point.The operating principle of extraction resistance 4 is that the both ends of analog-digital converter 6 under a certain special time, capture extraction electricity simultaneously
The voltage V1 and V2 at 4 both ends are hindered, V2 and V1 are subtracted each other into acquisition difference again afterwards, finally again by this difference divided by extraction resistance 4
Resistance is that can obtain the current component that signal is extracted under a certain special time, then is gathered and formed the electric current for extracting signal the time
Composition.Two inputs of analog-digital converter 7 are then respectively coupled to the both ends (+end of big coil 51 in Microspeaker 5
With-end), to capture in Microspeaker 5, under a certain special time, voltage (the i.e. coil thermal voltage at the both ends of big coil 51
Signal), analog-digital converter 7, which again subtracts each other the voltage at both ends, afterwards obtains difference to export to rear end.So simulation numeral
Converter 6,7 has the function of avometer.
The present invention separately provides a kind of method for determining the coil temperature of Microspeaker 5.Fig. 2 please be briefly return to, for table
Show that conveniently the handling process in Microspeaker 5 is divided into prime handling process and rear class handling process, prime processing stream by us
Journey refers to control thermometric integrating apparatus C and receives the process that extraneous input signal releases sound to driving；Rear class handling process is accused
Thermometric integrating apparatus C processed receives the process for showing temperature after the signal of Microspeaker 5 to external device (ED) T3.It is simple next
Say, be based on analog-digital converter 6,7, to distinguish prime and rear class.Before the input of analog-digital converter 6,7
Component is referred to as prime.The later component of the output end of analog-digital converter 6,7, includes analog-digital converter 6,7, Yi Ji
The component of analog-digital converter 6,7 thereafter is referred to as rear class.Detailed prime handling process refer to Fig. 4, and Fig. 4 is a kind of control
In thermometric integrating apparatus C, the handling process of prime.Step F1 is to F5 in Fig. 2 described below, and please also refer to Fig. 2 and Fig. 4：
Step F1：Input signal is provided by calculator.Thermometric integrating apparatus C is controlled via electric wire, bus, wire jumper or print
Wiring on printed circuit board is electrically connected with computer, both connect institute according to standard can be USB, SATA, SATA2 or
Via solder joint connection all can, after connection receive the electrical input signal from calculator T1.It is follow-up to carry out step F2.
Step F2：Input signal is received by wave filter and filters out the first frequency of input signal, to form output signal.
Because the input signal received includes various frequencies, and during signal transmits, easily has noise to be impregnated in input
In signal, and these noises are in low frequency part, in order to which by these noise removes, a filtering is especially set in input mostly
Device 1 is by these noises, i.e., to filter out the first frequency of input signal.First frequency most preferably can be 0 with 0 hertz to 100 hertz
More than hertz, in the range of no more than 50 hertz.It is follow-up to carry out step F3.
Step F3：Output signal and marking signal phase adduction are formed by sum signal by adder 2.Wherein marking signal
It is by a specific waveform generator T2 generation.Marking signal be a frequency be 50 hertz within signal.Use mark
The extraction of the voltage and current signal that are intended to enable rear end of signal is more accurate, and the other elements of rear end can be allowed to test
Demonstrate,prove the accuracy of signal extraction.It is follow-up to carry out step F4.
Step F4：Sum signal is amplified, extracts the current segment of sum signal to form extraction signal, and pass through extraction
The number of winning the confidence drives Microspeaker 5.Wherein sum signal is by power amplification by power amplifier 3.In the present invention not
The species of limiting power amplifier 3.The action of extraction herein is formed via extraction resistance 4.The resistance for extracting resistance 4 is to be selected from
Any one in 50 to 200 milliohms, it is to consider extraction letter to choose any one reason in the milliohm of resistance 50 to 200
Number amplitude and efficiency, choose this class value scope be capable of it is more undistorted retain extraction signal voltage or amplitude and maintenance
The delivery efficiency of voice signal.It is follow-up to carry out step F5.
Step F5：Signal is extracted to drive Microspeaker 5 to generate coil thermal voltage signal.Extraction signal be transferred to
After controlling the Microspeaker 5 that thermometric integrating apparatus is electrically connected with, Microspeaker 5 will send running and the sound.Sending
While the sound, because electric energy-kinetic energy conversion efficiency is not 100%, electric energy can be dissipated in the form of heat energy from coil, now
Because pyroelectric effect can form thermoelectricity potential difference at the both ends of big coil 51 in Microspeaker 5, i.e., coil thermal voltage letter herein
Number.This flow can subsequently be terminated, can also be in other flows that continue.If terminating this flow, i.e., this control thermometric is integrated
When device C is not connected with external device (ED) T3, this control thermometric integrating apparatus C only has controlled function, i.e., only drives micro-
Type loudspeaker 5 sends the function of the sound, and the present invention is only as a drive the speaker integrated circuit.If afterflow after carrying out
During the handling process of journey, i.e. rear class, then this control thermometric integrating apparatus C just has to be connected with external device (ED) T3.
Then Fig. 5 is refer to, Fig. 5 is represented in a kind of control thermometric integrating apparatus C, the process chart of rear class.Below
Step G1 is described in detail to G6, and please also refer to Fig. 2 and Fig. 5：Step G1：By analog-digital converter 6,7 by analog extraction
Signal and coil thermal voltage signal change into digital.Because analog signal is only that Microspeaker 5 is readable, for convenience
Follow-up signal transacting, the readable signal of follow up device is changed into, so by analog extraction signal and coil thermal voltage signal
It is transformed into by analog-digital converter 6,7 digital.Analog signal is, for example, 0 volt, 1 volt, 2 volts or 3
The random natural number signal with physical quantity of volt etc., but only by natural number 0,1, both are formed digital signal
Combination signal, such as 0011 or 1100 etc. four signals.It is follow-up to carry out step G2.
Step G2：The second frequency of extraction signal is filtered out by current filter 8, current signal is filtered out with generation.Second
The scope of frequency is typically 50 hertz to 20000 hertz, and a certain frequency range of extraction signal is captured using current filter 8
Purpose is to obtain general physically be referred to as thermocurrent signal.It is follow-up to carry out step G3.
Step G3：The second frequency of coil thermal voltage signal is filtered out by voltage filter 9, voltage letter is filtered out with generation
Number.The scope of second frequency is typically 50 hertz to 20000 hertz.The a certain frequency of extraction signal is captured using voltage filter 8
The purpose of rate scope is to obtain general physically be referred to as thermal voltage signal.In the embodiment of the present invention, step G3
It is follow-up to carry out step G4 after completion.In another embodiment of the present invention, step G2 and step G3 is to carry out simultaneously
's.
Step G4：To filtering out current signal and filtering out after voltage signal integrates, to generate current integration signal and electricity
Hematocrit sub-signal.Wherein current integration signal is, for example, to be obtained by filtering out current signal progress integral operation, voltage integrating meter letter
Number be, for example, by filter out voltage signal carry out integral operation and obtain.Integral operation is to be accumulated respectively using electric current as shown in Figure 2
Divide device 10 and voltage integrator 11.The scope of integration can be selected from 10 microseconds to 20 microseconds, the scope system not subject to the limits of integration.Afterwards
It is continuous to carry out step G5.
Step G5：Computing is carried out to current integration signal and voltage integrating meter signal, and generates resistance signal；Believed using resistance
Number processing after, generate temperature signal.Above-mentioned carried out computing is a division arithmetic, and arithmetic logic unit is disclosed by Fig. 2
Obtained by divider (Fig. 2 is not disclosed) in 12.It should be noted that arithmetic logic unit 12 can be by obtained by under the same time
Current integration signal is divided by with voltage integrating meter signal and obtains resistance signal.And the formula for handling resistance signal is, for example, via this
Invention formula (1).It will not be repeated here.It is follow-up to carry out step G6.Step G6：Transmission temperature signal gives external device (ED) T3.Outside dress
It is typically an electronic temp meter to put T3, or smart mobile phone.This control thermometric integrating apparatus C is via electric wire or jump
Line, it is connected by way of such as USB or printed circuit board wiring with this external device (ED) T3.Subsequently terminate this flow.
Fig. 6 is finally refer to, Fig. 6 is the waveform and signal schematic representation for representing first node N1 to the 5th node N5.Please one
And coordinating Fig. 2 to read, first node N1 signal is the input signal from calculator T1, and the signal of input signal is, for example, not
Regular ripple, amplitude is, for example, to be less than 500 millivolts in waveform.Section point N2 signal is the mark from waveform generator T2
Signal, amplitude is, for example, to be less than 250 millivolts in the waveform of marking signal.3rd node N3 signal is by power amplifier 3
The amplification sum signal that is exported of negative pole output pin, amplify amplitude in the waveform of sum signal and be amplified to 500 millivolts.
Fourth node N4 signal is the sum signal after the amplification exported by power amplifier 3, and waveform is, for example, the side of rule
Amplitude is amplified to 500 millivolts in ripple and waveform.5th node N5 signal is arithmetic logic unit 12 to external device (ED) T3
The signal sent, it is, for example, to directly display temperature value (50 DEG C) on external device (ED) T3.Above-mentioned first node N1 to fourth node N4
Obtained signal is all so-called analog signal, is all the signal of Time Continuous.Fourth node N4 is compared to first node again
N1 to the 3rd node N3 signal are the square waves of rule.The signal that above-mentioned 5th node N5 is obtained is the intelligible signal of user.
So circuit arrangement provided by the present invention and method have the effect of signal aspect conversion.
In summary, embodiments of the invention at least have following one of advantage or effect.The control of the present invention is surveyed
Warm integrating apparatus is to receive the input signal of calculator, after controlling the extraction resistance in thermometric integrating apparatus to extract amplification
Sum signal in voltage signal and export extraction signal, Microspeaker generates coil thermal voltage letter after receiving extraction signal
Number, control and current filter and voltage filter are also set up in thermometric integrating apparatus, current filter is filtered out in extraction signal
Second frequency composition and formed filter out current signal, voltage filter, which filters out, has second frequency in coil thermal voltage signal, with
Formation filters out voltage signal, filters out current signal and filters out voltage signal respectively by current integrator and voltage integrator progress
After integral operation, temperature signal is generated by arithmetic logic unit computing, can thus obtain Microspeaker coil
Real time temperature, reduce Microspeaker distortion even permanent damage chance.
The preferred embodiments of the invention is the foregoing is only, is not limited to the interest field of the present invention；More than simultaneously
Description, should can understand and implement for the special personage of correlative technology field, thus other without departing from it is disclosed it
The lower equivalent change or modification completed of spirit, should be included in claim.
Claims (8)
1. one kind control thermometric integrating apparatus, for determining the coil temperature in Microspeaker, it is characterised in that including：
Wave filter, the input signal transmitted for receiving calculator, and the first frequency in the input signal is filtered out,
Form output signal；
Adder, to handle the marking signal in the output signal and waveform generator, and by the output signal and institute
State marking signal and be summed to form sum signal；
Power amplifier, receive the sum signal and amplify the sum signal；
Resistance is extracted, receives the sum signal after amplification, and to the current signal in the sum signal after amplification
Carry out extraction and form extraction signal, and the extraction signal is sent to the Microspeaker；
The Microspeaker receives and handles the extraction signal to be believed with generating coil thermal voltage signal and sending the sound
Number；
Current filter, for filtering out the second frequency in the extraction signal, current signal is filtered out to be formed；
Voltage filter, for filtering out the second frequency in the coil thermal voltage signal, voltage signal is filtered out to be formed；
Current integrator, for the current signal that filters out to be integrated, and output current integrated signal；
Voltage integrator, for the voltage signal that filters out to be integrated, and output voltage integrated signal；And
Arithmetic logic unit, the current integration signal is received with after the voltage integrating meter signal union, obtaining resistance signal,
Temperature signal will be generated after resistance signal processing again, and send the temperature signal to external device (ED).
2. control thermometric integrating apparatus as claimed in claim 1, it is characterised in that the wave filter, the current filter
Cut-off frequency with the voltage filter is in the range of 50 hertz to 70 hertz.
3. control thermometric integrating apparatus as claimed in claim 1, it is characterised in that the scope of the first frequency is 0 hertz
More than, no more than 50 hertz, and the scope of the second frequency is 50 hertz to 20000 hertz.
4. control thermometric integrating apparatus as claimed in claim 1, it is characterised in that the Standard resistance range of the extraction resistance is 50
To between 200 milliohms.
5. control thermometric integrating apparatus as claimed in claim 1, it is characterised in that in the control thermometric integrating apparatus,
The prime of the voltage integrator and the current integrator is more provided with analog-digital converter, for by the extraction of simulation
The number of winning the confidence is converted into the extraction signal of numeral and the coil thermal voltage signal with the coil thermal voltage signal.
6. control thermometric integrating apparatus as claimed in claim 1, it is characterised in that generate temperature after the resistance signal processing
Signal, it is via following formula：
<mrow>
<mi>T</mi>
<mo>=</mo>
<mn>25</mn>
<mo>+</mo>
<mfrac>
<mrow>
<msub>
<mi>R</mi>
<mi>T</mi>
</msub>
<mo>-</mo>
<msub>
<mi>R</mi>
<mn>25</mn>
</msub>
</mrow>
<mrow>
<msub>
<mi>T</mi>
<mrow>
<mi>c</mi>
<mi>o</mi>
<mi>e</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>&CenterDot;</mo>
<msub>
<mi>R</mi>
<mn>25</mn>
</msub>
</mrow>
</mfrac>
</mrow>
The coil temperature that the T is, the RTIt is measured coil impedance under the coil temperature, the R25It is Celsius 25
Coil impedance when spending, the TcoefIt is the coil category temperature coefficient under the coil temperature.
A kind of 7. method for determining the coil temperature in Microspeaker, it is characterised in that including：
Input signal is provided by calculator；
The input signal is received by wave filter and filters out the first frequency of the input signal, to form output signal；
The output signal and marking signal phase adduction are formed by sum signal by adder；
The sum signal is amplified, extracts the electric current in the sum signal, to form extraction signal, the extraction signal is used
To drive Microspeaker to generate coil thermal voltage signal；
By analog-digital converter by it is analog it is described extraction signal and the coil thermal voltage signal change into it is digital；
The second frequency of the extraction signal is filtered out by current filtering, current signal is filtered out with generation；
The second frequency of the coil thermal voltage signal is filtered out by voltage filter, voltage signal is filtered out with generation；
Filter out current signal to described and filter out after voltage signal integrates, believed with generating current integration signal with voltage integrating meter
Number；
Computing is carried out to current integration signal and voltage integrating meter signal, and generates resistance signal；
After being handled using resistance signal, temperature signal is generated.
8. method as claimed in claim 7, it is characterised in that the scope of the first frequency is more than 0 hertz, no more than 50
Hertz, the scope of the second frequency is 50 hertz to 20000 hertz.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP18177414.2A EP3480952B1 (en) | 2017-11-01 | 2018-06-12 | Temperature detecting and controlling integration device and the temperature controlling method applied for micro speaker |
| US16/119,838 US10531193B2 (en) | 2017-11-01 | 2018-08-31 | Temperature detecting and controlling integration device and the temperature controlling method applied for micro speaker |
| US16/682,454 US10834504B2 (en) | 2017-11-01 | 2019-11-13 | Temperature detecting and controlling integration device and the temperature controlling method applied for micro speaker |
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| CN201711059595 | 2017-11-01 | ||
| CN2017110595958 | 2017-11-01 |
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| CN107702813A true CN107702813A (en) | 2018-02-16 |
| CN107702813B CN107702813B (en) | 2024-10-22 |
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| CN201711080667.7A Active CN107702813B (en) | 2017-11-01 | 2017-11-06 | Micro-speaker control temperature measurement integration device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109218956A (en) * | 2018-09-10 | 2019-01-15 | 上海傅硅电子科技有限公司 | The measurement method of speaker housings surface temperature, computer |
| CN109297614A (en) * | 2018-08-13 | 2019-02-01 | 厦门傅里叶电子有限公司 | Loudspeaker temperature protecting method based on phase change measurement |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1530661A (en) * | 2003-03-13 | 2004-09-22 | 三菱电机株式会社 | Current sensor |
| CN1579325A (en) * | 2003-08-05 | 2005-02-16 | 郭博昭 | ECG signal converter and its analog-to-digital conversion unit |
| CN102064802A (en) * | 2010-11-10 | 2011-05-18 | 北京航空航天大学 | Low-power consumption and low-distortion signal generator based on direct digital frequency synthetic technology |
| EP2538555A1 (en) * | 2011-06-22 | 2012-12-26 | Nxp B.V. | Control of a loudspeaker output |
| EP2806656A1 (en) * | 2013-05-21 | 2014-11-26 | ST-Ericsson SA | Loudspeaker heat control with state observation |
| EP3026931A1 (en) * | 2014-11-27 | 2016-06-01 | BlackBerry Limited | Method, system and appraratus for loudspeaker excursion domain processing |
| US9807528B1 (en) * | 2015-09-21 | 2017-10-31 | Apple Inc. | Electronic devices and method for thermal monitoring of an electro-mechanical actuator |
-
2017
- 2017-11-06 CN CN201711080667.7A patent/CN107702813B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1530661A (en) * | 2003-03-13 | 2004-09-22 | 三菱电机株式会社 | Current sensor |
| CN1579325A (en) * | 2003-08-05 | 2005-02-16 | 郭博昭 | ECG signal converter and its analog-to-digital conversion unit |
| CN102064802A (en) * | 2010-11-10 | 2011-05-18 | 北京航空航天大学 | Low-power consumption and low-distortion signal generator based on direct digital frequency synthetic technology |
| EP2538555A1 (en) * | 2011-06-22 | 2012-12-26 | Nxp B.V. | Control of a loudspeaker output |
| EP2806656A1 (en) * | 2013-05-21 | 2014-11-26 | ST-Ericsson SA | Loudspeaker heat control with state observation |
| EP3026931A1 (en) * | 2014-11-27 | 2016-06-01 | BlackBerry Limited | Method, system and appraratus for loudspeaker excursion domain processing |
| US9807528B1 (en) * | 2015-09-21 | 2017-10-31 | Apple Inc. | Electronic devices and method for thermal monitoring of an electro-mechanical actuator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297614A (en) * | 2018-08-13 | 2019-02-01 | 厦门傅里叶电子有限公司 | Loudspeaker temperature protecting method based on phase change measurement |
| CN109218956A (en) * | 2018-09-10 | 2019-01-15 | 上海傅硅电子科技有限公司 | The measurement method of speaker housings surface temperature, computer |
| CN109218956B (en) * | 2018-09-10 | 2021-02-26 | 上海傅硅电子科技有限公司 | Method for measuring surface temperature of loudspeaker shell and computer |
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|---|---|
| CN107702813B (en) | 2024-10-22 |
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