CN219938343U - Interphone with wireless control and Bluetooth audio transmission - Google Patents
Interphone with wireless control and Bluetooth audio transmission Download PDFInfo
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Abstract
The utility model relates to the technical field of vehicle interphones, and discloses an interphone with wireless control and Bluetooth audio transmission, which comprises a control circuit module for wireless communication, a main control module (100) and a Bluetooth control module, wherein the main control module is used for outputting and receiving instruction signals and establishing connection and audio transmission of external Bluetooth equipment; the wireless radio frequency receiving module (400) is used for receiving a wireless operation instruction input by the peripheral equipment and establishing wireless connection with the peripheral equipment according to the input related operation instruction; the wireless voice intercom and data transmission module (200) is used for receiving and sending instruction signals and receiving and transmitting audio signals.
Description
Technical Field
The utility model relates to the technical field of vehicle interphones, in particular to an interphone with wireless control and Bluetooth audio transmission.
Background
Handheld walkie-talkies are the more common communication devices in the field of wireless telephony. At present, all interphones on the market need to be operated by hand, common handheld interphones need to be held by hand to enable equipment to be close to a mouth for intercom, and most common interphones used by security personnel or vehicle-mounted radio stations used by taxis are used.
The common sound is greatly influenced by external noise, and the receiving effect of a receiver is influenced; if the earphone equipment is added, the earphone equipment is still a wired earphone, the earphone equipment still needs to be held by hand, is particularly unfavorable for vehicle-mounted operation and use, and comprises not only automobiles, motorcycles, electric bicycles, bicycles and the like, but also the use is relatively inconvenient.
The power of the handheld interphone is generally 0.5 watt or more, the radiation value to the human body is high, and the human health is not utilized after long-time use.
Disclosure of Invention
The utility model aims at solving the technical problems that the common sound in the prior art is greatly influenced by external noise, and the receiving effect of a receiver is influenced; the wireless control and Bluetooth audio transmission interphone has the advantages that the wireless control and Bluetooth audio transmission interphone is large in radiation to a human body in a short distance, if the earphone equipment is additionally arranged, the wireless earphone is still a wired earphone, the wireless control and Bluetooth audio transmission interphone still needs to be held for use, and the wireless control and Bluetooth audio transmission interphone is particularly unfavorable for vehicle-mounted operation and has high reliability, and the influence on the radiation to the human body is remarkably reduced.
The technical scheme adopted for solving the technical problems is as follows: an interphone with wireless control and Bluetooth audio transmission is constructed,
comprising a control circuit module for wireless communication, which comprises
The main control module has a Bluetooth function and is configured in the control circuit module and is used for outputting and receiving instruction signals, connecting external Bluetooth equipment and transmitting audio;
the signal end of the main control module is connected with the wireless radio frequency receiving module and is used for receiving the wireless operation instruction, and the corresponding module is controlled outwards after being processed; or establishing wireless connection with external Bluetooth equipment for voice transmission and instruction transmission; or instructions are transmitted, audio frequency is transmitted,
a wireless radio frequency receiving module for receiving wireless operation instructions input by peripheral equipment,
the signal output end of the wireless radio frequency receiving module is connected with a signal input end of the main control module and is used for establishing wireless connection with the peripheral equipment according to the input wireless operation instruction after receiving the wireless operation instruction;
the signal input end of the wireless voice intercom and data transmission module is connected with the signal output end of the main control module and is used for receiving the instruction signal and receiving and transmitting the audio,
the signal output end of the wireless voice intercom and data transmission module is connected with the signal input end of the main control module, and is used for sending and receiving instruction signals and transmitting audio signals, modulating the audio signals and transmitting the audio signals to the main control module.
In some embodiments, the master control module comprises a master controller,
the signal end of the master controller is connected with the signal end of the wireless voice intercom and data transmission module and is used for receiving and transmitting the instruction signal and audio transmission,
the signal end of the main controller is connected with an LCD (liquid crystal display) screen and is used for displaying the interphone setting parameters;
the signal end of the master controller is connected with the key and used for related operation of the interphone;
and the signal end of the master controller is connected with the audio signal switching module and is used for switching microphone horn signals.
In some embodiments, the wireless voice intercom and data transmission module comprises a first controller and a first triode,
the transmitting end/receiving end of the first controller is respectively connected with the receiving end/transmitting end of the main controller and is used for receiving the instruction signal,
the audio signal input end of the first controller is connected with the audio signal output end of the main controller and is used for receiving the input audio signal,
the collector of the first triode is connected with the signal input end of the first controller, the base of the first triode is connected with the signal output end of the main controller, and the emitter of the first triode is connected with the public end.
In some embodiments, the first transistor is an NPN transistor.
In some embodiments, the wireless radio frequency receiving module includes a second controller,
the radio frequency signal input end of the second controller receives the wireless connection instruction input by the peripheral equipment through an antenna;
the signal output end of the second controller is coupled to a signal input end of the main controller, and the main controller is used for receiving the wireless connection instruction.
In some embodiments, an audio signal switching module is also included,
and a signal input end of the audio signal switching module is connected with a signal output end of the main control module and is used for receiving a switching instruction signal input by the main control module and switching the input/output mode of the signal according to the switching instruction signal.
In some embodiments, the audio signal switching module includes a switching controller,
the signal input end of the switching controller is connected with a signal output end of the main control module and is used for receiving the switching instruction signal input by the main control module and switching the input/output mode of the signal according to the switching instruction signal.
In some embodiments, an audio power amplification module is also included,
a signal input end of the audio power amplification module is connected with a signal output end of the main control module,
and a signal input end of the audio power amplification module is connected with a signal output end of the wireless voice intercom and data transmission module.
In some embodiments, the LCD liquid crystal display is connected to the signal control end of the main control module, and is used for displaying and searching external bluetooth devices, and displaying corresponding content according to the setting.
The interphone with wireless control and Bluetooth audio transmission comprises a control circuit module for wireless communication, wherein the control circuit module comprises a main control module for outputting instruction signals, bluetooth connection and audio transmission, a wireless radio frequency receiving module and a wireless voice intercom and data transmission module, wherein the main control module actively searches external Bluetooth equipment, establishes connection and transmits instructions and audio signals; the wireless radio frequency receiving module is used for receiving a wireless operation instruction input by the peripheral equipment, and the main control module establishes wireless connection with the peripheral equipment according to the input wireless operation instruction; the wireless voice intercom and data transmission module is used for receiving instruction signals and audio signals, the signal output end of the wireless voice intercom and data transmission module is connected with the signal input end of the main control module and used for sending the instruction signals and receiving the audio signals, and the wireless voice intercom and data transmission module is transmitted to external Bluetooth equipment which is connected with the current interphone through the main control module. Compared with the prior art, the vehicle-mounted steering wheel is used in the vehicle-mounted field, so that the operation convenience, the universality and the driving safety are improved, the steering wheel/handle can be prevented from being separated by hands, and unsafe factors in the driving process are reduced;
on the other hand, the Bluetooth connection is adopted, so that convenience and practicability are greatly improved, radiation is reduced, bluetooth power is generally 2.5mW, and influence on a human body is small when the Bluetooth connection is used.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a circuit diagram of a master control module according to an embodiment of the control circuit module provided by the present utility model;
fig. 2 is a circuit diagram of a wireless voice intercom and data transmission module according to an embodiment of the control circuit module provided by the present utility model;
FIG. 3 is a circuit diagram of an audio signal switching module according to an embodiment of the control circuit module provided by the present utility model;
fig. 4 is a circuit diagram of a radio frequency receiving module according to an embodiment of the control circuit module provided by the present utility model;
fig. 5 is a circuit diagram of an audio power amplifying module according to an embodiment of the control circuit module provided by the present utility model.
Description of the embodiments
For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings.
As shown in fig. 1 to 5, in a first embodiment of the intercom with wireless manipulation and bluetooth audio transmission of the present utility model, the intercom with wireless manipulation and bluetooth audio transmission includes a control circuit module for wireless communication, where the control circuit module includes a main control module 100, a wireless voice intercom and data transmission module 200, an audio signal switching module 300, a wireless radio frequency receiving module 400 and an audio power amplifying module 500.
The main control module 100 has the functions of outputting a Bluetooth command signal, operating the command signal, supporting Bluetooth dual-mode wireless communication, receiving a digital audio signal, processing signals and operating, transmitting keys and audio, and displaying related information on an LCD display screen; .
The main control module 100 may be connected to a peripheral bluetooth device (generally referred to as a bluetooth headset or a vehicle bluetooth device), and may receive an audio signal transmitted by the bluetooth device after connection, or may transmit the received audio signal to the peripheral bluetooth device.
The peripheral Bluetooth device can be a Bluetooth earphone, bluetooth carried by the vehicle navigation, a Bluetooth sound box or a mobile phone, and the like.
The wireless voice intercom and data transmission module 200 has the functions of wireless data transmission, radio frequency transmission (signal modulation), radio frequency receiving and radio frequency power amplification, and the frequency range is as follows: 136-174MHZ,400-470MHZ;
the frequency step may be selected as: 5K/6.25K/12.5K/25K;
the RF output power is: 500mW or more;
communication distance: the open area is greater than 3 km.
The audio signal switching module 300 is configured to receive a switching command signal input by the main control module 100, and switch a manner of inputting or outputting the signal according to the switching command signal.
For example: the interphone body is provided with a microphone, a loudspeaker and a microphone and a loudspeaker of Bluetooth equipment;
when the microphone and the loudspeaker of the interphone body are used as the input or output of the audio signal, the audio signal switching module 300 switches to the microphone and the loudspeaker of the interphone body, and the microphone and the loudspeaker at the Bluetooth equipment end do not work;
when the microphone and the speaker of the bluetooth device are used as the input or output of the audio signal, the microphone and the speaker of the interphone body do not operate.
The radio frequency receiving module 400 is configured to receive and decode signals transmitted from a wireless control input end (such as a wireless remote control or a mobile phone), and transmit the signals to the main control module 100.
The audio power amplification module 500 is configured to receive and amplify an audio signal output after being processed by the wireless voice intercom and data transmission module 200.
Specifically, the main control module 100 is configured in the control circuit module, and has a bluetooth function, and receives a bluetooth signal input by an external bluetooth device (such as a bluetooth headset) through an antenna (corresponding to BT-ANT) to obtain a nearby bluetooth device (such as the bluetooth headset), so that the peripheral bluetooth device (such as a bluetooth or bluetooth headset carried by the vehicle navigation) establishes a bluetooth communication connection with the peripheral bluetooth device;
when an external Bluetooth device (such as a Bluetooth or a Bluetooth headset carried by the vehicle navigation) establishes Bluetooth communication connection with the interphone, an audio signal output by the external Bluetooth device is input into the main control module 100; the audio signal of the main control module 100 is transmitted to the external bluetooth device.
Further, the signal input end of the radio frequency receiving module 400 is used for receiving a wireless operation instruction input by a peripheral device (such as a remote controller).
Specifically, the signal output end of the wireless radio frequency receiving module 400 is connected to a signal input end of the main control module 100, and is configured to receive the wireless connection instruction, and enable the peripheral device (such as a remote controller) to establish a wireless control connection with the interphone through the wireless connection instruction.
Further, the signal end of the wireless voice intercom and data transmission module 200 is connected with the signal end of the main control module 100, and is used for transmitting command signals and audio signals between the wireless voice intercom and data transmission module 100, when the wireless voice intercom and data transmission module 200 receives the audio signals, the wireless voice intercom and data transmission module 200 externally transmits the audio signals at a certain set frequency after processing, so that the receiving frequency is in communication connection with an external interphone with the current interphone transmitting frequency, and further information interaction can be performed.
Specifically, when the external transmission is needed, the remote controller key is pressed, then the Bluetooth headset is used for speaking, the audio signal is transmitted to the main control module 100 for processing through the external Bluetooth headset, and then the audio signal is output to the wireless voice intercom and data transmission module 200 for processing and then is transmitted to the external.
Wireless control and wireless Bluetooth voice transmission are realized, and the wireless Bluetooth voice transmission is transmitted to the interphone from the Bluetooth headset.
On the other hand, the main control module 100 receives the audio signal input by the wireless voice intercom and data transmission module 200, modulates the input audio signal to obtain a signal suitable for being transmitted, and transmits the signal to an external bluetooth device (bluetooth headset) which establishes bluetooth connection with the current intercom, thereby realizing signal interaction.
Specifically, the intercom and data transmission module 200 receives the audio signal fed back, and transmits the audio signal to the main control module 100 for processing, and the main control module 100 transmits the audio signal to the external bluetooth device through bluetooth.
And the feedback of wireless transmission audio signals is realized, and the audio signals are transmitted to the Bluetooth headset from the interphone.
Modulation is the use of a baseband signal to control the change of one or more parameters of a carrier signal over which information is carried to form a modulated signal transmission.
The wireless voice intercom and data transmission module 200 is internally provided with a high-performance radio frequency transceiver chip and a radio frequency power amplifier, and the main control module 100 can set working parameters of the module through standard asynchronous serial interface (such as RS 232) communication and control signal transmission of the whole module.
When the current input audio signal needs to be transmitted, when the pulse signal output by the main control module 100 is at a high level, the wireless voice intercom and data transmission module 200 is triggered in a controlled manner, and the modulated audio signal can be transmitted at the transmitting end (corresponding to the ANT 1).
For example, before driving a car, the user turns on a bluetooth mode of an external device (such as a bluetooth or a bluetooth headset of the car navigation); the main control module 100 of the interphone searches for external Bluetooth equipment and sends a connection instruction to the external Bluetooth equipment through operation, so that Bluetooth connection is established between the external equipment and the main control module 100 of the interphone, and the pairing is successful; in the driving process, a user sends an intercom instruction to the wireless receiving module 400 through a wireless remote controller arranged on a steering wheel or a handle, the wireless receiving module 400 processes and transmits the instruction to the main control module 100 after receiving the instruction, the main control module starts an intercom mode after receiving a signal, an audio signal input from external Bluetooth equipment (such as a Bluetooth headset) is transmitted to the main control module 100 through Bluetooth wireless transmission, the input audio signal is processed by the main control module 100, then the input audio signal is input to the wireless voice intercom and data transmission module 200, the wireless voice intercom and data transmission module 200 modulates the audio signal, and the modulated audio signal is emitted outwards according to a set frequency. When the wireless voice intercom and data transmission module 200 receives the audio signal with the corresponding frequency, the audio signal is processed by the wireless voice intercom and data transmission module and then transmitted to the main control module 100 for processing, and the audio signal is externally transmitted to the external Bluetooth device through Bluetooth for being played for a user to listen.
Thus, an intercom process is completed.
By using the technical scheme, the vehicle-mounted steering wheel is used in the vehicle-mounted field, so that the operation convenience, the universality and the driving safety are improved, the steering wheel/handle can be prevented from being separated by hands, and unsafe factors in the driving process are reduced;
on the other hand, the Bluetooth connection is adopted, so that convenience and practicability are greatly improved, radiation is reduced, bluetooth power is generally 2.5mW, and influence on a human body is small when the Bluetooth connection is used.
However, the power of the conventional interphone is about 0.5-10 watts, the interphone needs to be close to the face during operation, radiation has a large influence on human bodies, and long-term use of the interphone affects the health of users.
In some embodiments, in order to improve the performance of the intercom, as shown in fig. 1, a master controller U101, a first crystal oscillator circuit, a second crystal oscillator circuit and a transmitting and receiving circuit may be disposed in the master control module 100, where the master controller U101 has the functions of outputting bluetooth command signals, supporting bluetooth dual-mode wireless communication, receiving digital audio signals, and processing and operating signals;
the first crystal oscillator circuit and the second crystal oscillator circuit are used for generating an oscillation clock signal and providing the clock signal for the master controller U101;
the transmitting and receiving circuit is used for outputting and receiving instruction signals so as to control the current interphone to establish Bluetooth connection with external Bluetooth equipment needing communication; for voice transmission with an external bluetooth device.
Specifically, the signal output end (corresponding to 6 pins) of the master controller U101 is connected to the signal input end of the wireless voice intercom and data transmission module 200, outputs an instruction signal to the wireless voice intercom and data transmission module 200, and performs a corresponding action after processing.
The master controller U101 searches for an external bluetooth device, establishes connection with the external bluetooth device, and then mutually performs instruction signals with the external bluetooth device to realize audio signal transmission.
The signal input end (corresponding to 7 pins) of the master controller U101 is connected to the signal output end of the wireless radio frequency receiving module 400, and is configured to receive the wireless connection instruction (corresponding to the remote controller input) input by the wireless radio frequency receiving module 400, and enable a peripheral device (such as a remote controller or a mobile phone) to establish wireless communication connection with the interphone through the wireless connection instruction, so as to achieve wireless control.
Further, when the external bluetooth device establishes a bluetooth connection with the master controller U101, an audio signal input by the external bluetooth device is input into the master controller U101 through wireless transmission, the master controller U101 processes the input audio signal, and then outputs the processed audio signal to the wireless voice intercom and data transmission module 200, and the audio signal is modulated by the wireless voice intercom and data transmission module 200 and then transmitted to an intercom which establishes communication connection with the current intercom.
When the audio signal is fed back by the external interphone, the fed back audio signal is input into the wireless voice intercom and data transmission module 200, is demodulated by the wireless voice intercom and data transmission module 200, and is output to the external Bluetooth device (such as Bluetooth or Bluetooth earphone carried by the vehicle navigation) after passing through the main controller U101 so as to form information intercommunication.
The demodulation is to restore the received digital band signal to a digital baseband signal at the receiving end, and the original baseband signal is restored from the parameter change of the modulated signal by a specific method.
The transmitting circuit includes a first inductor L101, a sixth capacitor C106, a second inductor L102 and an antenna (corresponding to BT-ANT) connected in parallel, one end of the first inductor L101 and one end of the sixth capacitor C106 are connected to a signal output end (corresponding to 16 pins) of the main controller U101, and one end of the second inductor L102 is connected to the antenna (corresponding to BT-ANT).
The bluetooth command signal output by the main controller U101 is output through the transmitting circuit, so as to obtain nearby external devices (such as bluetooth or bluetooth headset carried by the vehicle navigation device) and establish bluetooth communication connection with the external devices.
The first crystal oscillator circuit comprises a ninth capacitor C109, a first crystal oscillator X1 and a tenth capacitor C110 which are connected in parallel, wherein two ends of the first crystal oscillator X1 are respectively connected with signal ends (corresponding to 12 pins and 13 pins) of the main controller U101, and clock signals generated by the first crystal oscillator X1 are input into the main controller U101 through the signal ends (corresponding to 12 pins and 13 pins);
the second crystal oscillator circuit comprises an eleventh capacitor C111, a second crystal oscillator Y1 and a twelfth capacitor C112 which are connected in parallel, wherein two ends of the second crystal oscillator Y1 are respectively connected with signal ends (corresponding to 17 pins and 18 pins) of the main controller U101, and clock signals generated by the second crystal oscillator Y1 are input into the main controller U101 through the signal ends (corresponding to 17 pins and 18 pins).
In some embodiments, in order to ensure stability and energy saving of audio signal transmission of the interphone, as shown in fig. 2, a first controller U201, a first triode VT201 and a transmitting module may be disposed in the wireless voice intercom and data transmission module 200, where the first controller U201 has functions of wireless data transmission, radio frequency transmission (signal modulation), radio frequency receiving and radio frequency power amplification;
the first triode VT201 has a switching function, and is selected as an NPN triode;
the radio frequency module is used for transmitting the audio signal and the instruction signal processed by the first controller U201.
Specifically, the audio signal input end (corresponding to 5 pins) of the first controller U201 is configured to receive an input audio signal, and perform modulation processing on the input audio signal; and the signal input end (corresponding to 12 pins) of the first controller U201 is configured to receive an input command signal, and transmit the input command signal through the radio frequency module, where an intercom that needs to establish communication connection with the current intercom receives the command signal, so that the current intercom establishes wireless connection with another intercom.
The sixteenth capacitor C204 is further disposed at the audio signal input end (corresponding to the 5 pins) of the first controller U201, and is configured to absorb spike ripple when the audio signal is input, so as to ensure the reliability of the operation of the first controller U201;
the transmitting end (corresponding to 15 pins) of the first controller U201 is connected with the receiving end (corresponding to 28 pins) of the main controller U101 through a sixth resistor R205, and the receiving end (corresponding to 12 pins) of the first controller U201 is connected with the transmitting end (corresponding to 27 pins) of the main controller U101 through a third resistor R202;
further, a collector of the first triode VT201 is connected to a signal input end (corresponding to 13 pins) of the first controller U201, a base of the first triode VT201 is connected to a signal output end (corresponding to 6 pins) of the main controller U101, and is configured to receive a pulse signal output by the main controller U101, and an emitter of the first triode VT201 is connected to a common end.
Specifically, when the pulse signal output by the master controller U101 is at a low level, the first triode VT201 is turned off, and the first controller U201 is suspended and in a receiving state;
when the pulse signal output by the main controller U101 is at a high level, the first triode VT201 is turned on, the first controller U201 is grounded and in a transmitting state, and the command signal or the audio signal is transmitted and output.
Further, the radio frequency module includes a third inductor L201, a fourth inductor L202, a seventeenth capacitor C205, an eighteenth capacitor C206, a nineteenth capacitor C207, a twentieth capacitor C208, a twenty first capacitor C209, an eleventh resistor R210, and a transmitting antenna (corresponding to ANT 1) connected in parallel, and when the first controller U201 is in a transmitting state, the modulated command signal or the audio signal is transmitted through the transmitting module.
In some embodiments, in order to improve the performance of the interphone, as shown in fig. 3, an audio signal switching module 300 may be provided in the control circuit module, and is configured to receive a switching command signal input by the main control module 100, and switch an input/output mode of the signal according to the switching command signal.
Specifically, a signal input end of the audio signal switching module 300 is connected to a signal output end of the main control module 100, and is configured to receive a switching command signal input by the main control module 100, and switch an input/output mode of the signal according to the switching command signal.
Further, as shown in fig. 3, a switching controller U301 for gain-amplifying an input audio signal is provided in the audio signal switching module 300.
Specifically, the signal input end (corresponding to 6 pins) of the switching controller U301 is connected to a signal output end (corresponding to 8 pins) of the main control module 100 through a fourteenth resistor R303, and is configured to receive a switching command signal input by the main control module 100, and switch an input/output mode of the signal according to the switching command signal.
When the switching command signal is at the first level, the microphone and the loudspeaker of the interphone body can be used as the input or output of the audio signal;
when the switching instruction signal is at the second level, the microphone and the loudspeaker of the Bluetooth device can be used as the input or output of the audio signal;
such as: when the interphone body is used, a microphone and a loudspeaker are used as the input or output of the audio signals, and the microphone and the loudspeaker of the Bluetooth device are used as the input or output of the audio signals.
More specifically, when the switching command signal is input to the main control module 100 at the first level, the signal input end (corresponding to 3 pins) of the switching controller U301 is connected to the output end (MIC-IN 1 end) of the microphone (corresponding to MIC) through the twenty-second capacitor C301, and is configured to receive the audio signal input by the microphone (corresponding to MIC);
the output terminal (corresponding to 4 pins) of the switching controller U301 is connected to the audio signal input terminal (corresponding to 4 pins) of the audio power amplifying module 500 through a twenty-fifth capacitor C304.
A twelfth resistor R301 and a thirteenth resistor R302 connected in series are arranged at one end of the microphone (corresponding to the MIC), one end of the twelfth resistor R301 is connected with a +3v power supply end, and the +3v voltage is reduced through the twelfth resistor R301 and the thirteenth resistor R302 to provide a working power supply for the microphone (corresponding to the MIC).
That is, when the interphone body microphone and the speaker are used as input or output of the audio signal, the microphone (corresponding to MIC) and the speaker operate, and the bluetooth device does not operate.
In some embodiments, in order to improve the signal receiving performance of the intercom, as shown in fig. 4, a second controller U401 may be disposed in the wireless radio frequency receiving module 400, where the second controller U401 has the functions of radio frequency receiving and signal processing.
Specifically, the radio frequency signal input end (corresponding to pin 2) of the second controller U401 receives, via an antenna (corresponding to ANT 1), a wireless control signal output by a peripheral device (such as a remote controller) after the wireless connection has been established.
Specifically, the wireless control signal output by the peripheral device is input to the radio frequency signal input end (corresponding to pin 2) of the second controller U401 through the antenna (corresponding to ANT 1) and the fifth inductor L401.
The signal output end (corresponding to 5 pins) of the second controller U401 is connected to the signal input end (corresponding to 7 pins) of the main controller U101, and the main controller U101 is configured to receive the audio signal output by the second controller U401, process the input wireless control signal, and output the processed wireless control signal to the first controller U201.
In some embodiments, as shown in fig. 5, in order to improve the performance of the intercom, an audio power amplifying module 500 may be provided in the control circuit module for amplifying an input audio signal or a feedback audio signal.
Specifically, a signal input end (corresponding to pin 1) of the audio power amplification module 500 is connected to a signal output end (corresponding to pin 15) of the main control module 100, and is configured to receive a demodulated audio signal or a feedback audio signal.
The other signal input end (corresponding to 4 pins) of the audio power amplification module 500 is connected to a signal output end (corresponding to 4 pins) of the first controller U201 (belonging to the wireless voice intercom and data transmission module 200) for receiving and amplifying the output audio signal or the feedback audio signal.
The audio power amplifying module 500 includes an audio amplifying chip U501, and a signal input end (corresponding to pin 1) of the audio amplifying chip U501 is connected to a signal output end (corresponding to pin 15) of the master controller U101 (belonging to the master control module 100) through a seventeenth resistor R502, and is configured to receive the demodulated audio signal.
The other signal input terminal (corresponding to 4 pins) of the audio amplifying chip U501 is connected to a signal output terminal (corresponding to 4 pins) of the first controller U201 through a nineteenth resistor R504, a thirty third capacitor C503 and a twentieth resistor R505 which are connected in series.
The first audio output end (corresponding to 8 pins) and the second audio output end (corresponding to 5 pins) of the audio amplifying chip U501 output the audio signal input by the main controller U101.
In this technical scheme, mainly to the small-size intercom of on-vehicle use, need consider the security of operation in the driving process, convenience, practicality also can replace current handheld intercom to use, bluetooth headset popular at present, the product changes wireless earphone into, wireless control increases user's convenience, reduces the radiation influence.
It can be understood that the technical scheme provides at least 4 working modes, and a user can select the microphone and the loudspeaker of the interphone as the input or output of the audio signal according to the current use environment; or selecting a bluetooth device; or selects wireless manipulation as audio signal input or output.
In the first mode, when no Bluetooth earphone/navigation Bluetooth connection is available and no wireless remote controller is available, the main control module 100 presses an intercom button on the host, sends an intercom instruction to the wireless voice intercom and data transmission module 200, sends a microphone and loudspeaker instruction switched to the host to the audio signal switching module 300, and takes the host to speak near the mouth, and the voice is sent outwards through the wireless voice intercom and data transmission module 200 according to the set transmitting frequency; the voice sent by the opposite party is received and processed by the wireless voice intercom and data transmission module 200 and is played in real time through a loudspeaker;
mode two, there is no bluetooth headset, there is wireless remote control. Pressing a wireless remote control talk-back button, wherein the wireless radio frequency receiving module 400 receives a wireless control instruction (talk-back instruction), transmits the wireless control instruction to the main control module 100 after processing, and after receiving the wireless control instruction, the main control module 100 transmits the talk-back instruction to the wireless voice talk-back and data transmission module 200, transmits the instruction switched to a microphone and a loudspeaker on a host to the audio signal switching module 300, and holds the host to speak near the mouth, and the voice is transmitted to the outside through the wireless voice talk-back and data transmission module 200 according to the set transmitting frequency; the voice sent by the opposite party is received and processed by the wireless voice intercom and data transmission module 200 and is played in real time through a loudspeaker;
in the third mode, when the Bluetooth earphone/navigation Bluetooth is connected but the wireless remote controller is not provided, an intercom button on the host is pressed, the main control module 100 sends an intercom instruction to the wireless voice intercom and data transmission module 200, a microphone and a loudspeaker instruction switched to the Bluetooth earphone or the navigation Bluetooth are sent to the audio signal switching module 300, the voice is directly uttered, is received by the microphone of the Bluetooth earphone or the navigation microphone and is transmitted to the main control module 100 through Bluetooth wireless signals, and is transmitted to the wireless voice intercom and data transmission module 200 after being processed, and the wireless voice intercom and data transmission module 200 sends outwards according to the set transmitting frequency; the voice sent by the other party is received and processed by the wireless voice intercom and data transmission module 200 and then transmitted to the main control module 100, and the main control module 100 sends a Bluetooth signal to a Bluetooth earphone or a navigation loudspeaker to play;
mode four (i.e. described in this new patent application), having a bluetooth headset/navigation bluetooth connection and having a wireless remote controller, pressing a wireless remote control intercom button, the wireless radio frequency receiving module 400 receiving a wireless control instruction (intercom instruction), transmitting to the main control module 100 after processing, the main control module 100 transmitting an intercom instruction to the wireless voice intercom and data transmission module 200, the method comprises the steps that a microphone and a loudspeaker instruction for switching to a Bluetooth headset or navigating Bluetooth are sent to an audio signal switching module 300, the microphone and the loudspeaker instruction are directly used for speaking, voice is received by the microphone of the Bluetooth headset or the microphone for navigating, the voice is transmitted to a main control module 100 through Bluetooth wireless signals, the main control module 100 transmits the processed voice to a wireless voice intercom and data transmission module 200, and the wireless voice intercom and data transmission module 200 sends the voice according to set transmitting frequency; the voice sent by the other party is received and processed by the wireless voice intercom and data transmission module 200 and then transmitted to the main control module 100, and the main control module 100 sends a Bluetooth signal to the Bluetooth headset or the navigation loudspeaker for playing.
The embodiments of the present utility model have been described above with reference to the accompanying drawings, but the present utility model is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are to be protected by the present utility model.
Claims (9)
1. An interphone with wireless control and Bluetooth audio transmission is characterized in that,
comprising a control circuit module for wireless communication, which comprises
The main control module has a Bluetooth function and is configured in the control circuit module for outputting and receiving instruction signals and establishing connection and audio transmission of external Bluetooth equipment,
wherein the signal end of the main control module is connected with the wireless radio frequency receiving module and is used for receiving wireless operation instructions, and the corresponding module is externally controlled after processing, or
Establishing wireless connection with external Bluetooth device for voice transmission and instruction transmission, or
Instruction transmission and audio transmission are carried out with the wireless voice intercom and data transmission module;
a wireless radio frequency receiving module for receiving wireless operation instructions input by peripheral equipment,
the signal output end of the wireless radio frequency receiving module is connected with a signal input end of the main control module and is used for establishing wireless connection with the peripheral equipment according to the input wireless operation instruction after receiving the wireless operation instruction;
the signal input end of the wireless voice intercom and data transmission module is connected with the signal output end of the main control module and is used for receiving the instruction signal and receiving and transmitting the audio;
the signal output end of the wireless voice intercom and data transmission module is connected with the signal input end of the main control module, and is used for sending and receiving instruction signals and transmitting audio signals, modulating the audio signals and transmitting the audio signals to the main control module.
2. The interphone with wireless manipulation and Bluetooth audio transmission as claimed in claim 1, wherein,
the main control module comprises a main controller and a control unit,
the master controller performs wireless communication, audio transmission,
the signal end of the master controller is connected with the signal end of the wireless voice intercom and data transmission module and is used for receiving and transmitting the instruction signal and audio transmission,
the signal end of the main controller is connected with an LCD (liquid crystal display) screen and is used for displaying the interphone setting parameters;
the signal end of the master controller is connected with the key and used for related operation of the interphone;
and the signal end of the master controller is connected with the audio signal switching module and is used for switching microphone horn signals.
3. The interphone with wireless manipulation and Bluetooth audio transmission as claimed in claim 2, wherein,
the wireless voice intercom and data transmission module comprises a first controller and a first triode,
the transmitting end/receiving end of the first controller is respectively connected with the receiving end/transmitting end of the main controller and is used for receiving the instruction signal,
the audio signal input end of the first controller is connected with the audio signal output end of the main controller and is used for receiving the input audio signal,
the collector of the first triode is connected with the signal input end of the first controller, the base of the first triode is connected with the signal output end of the main controller, and the emitter of the first triode is connected with the public end.
4. The interphone with wireless manipulation and Bluetooth audio transmission as claimed in claim 3, wherein,
the first triode is an NPN triode.
5. The interphone with wireless manipulation and Bluetooth audio transmission as claimed in claim 2, wherein,
the radio frequency receiving module comprises a second controller,
the radio frequency signal input end of the second controller receives the wireless connection instruction input by the peripheral equipment through an antenna;
the signal output end of the second controller is coupled to a signal input end of the main controller, and the main controller is used for receiving the wireless connection instruction.
6. The interphone with wireless manipulation and Bluetooth audio transmission as claimed in claim 1, wherein,
also comprises an audio signal switching module,
and a signal input end of the audio signal switching module is connected with a signal output end of the main control module and is used for receiving a switching instruction signal input by the main control module and switching the input/output mode of the signal according to the switching instruction signal.
7. The interphone with wireless manipulation and Bluetooth audio transmission as claimed in claim 6, wherein,
the audio signal switching module includes a switching controller,
the signal input end of the switching controller is connected with a signal output end of the main control module and is used for receiving the switching instruction signal input by the main control module and switching the input/output mode of the signal according to the switching instruction signal.
8. The interphone with wireless manipulation and Bluetooth audio transmission as claimed in claim 1, wherein,
also included is an audio power amplification module,
a signal input end of the audio power amplification module is connected with a signal output end of the main control module,
and a signal input end of the audio power amplification module is connected with a signal output end of the wireless voice intercom and data transmission module.
9. The interphone with wireless manipulation and Bluetooth audio transmission as claimed in claim 2, wherein,
the LCD is connected with the signal control end of the main control module, is used for displaying and searching external Bluetooth equipment, and is used for displaying corresponding content according to the setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321112999.XU CN219938343U (en) | 2023-05-10 | 2023-05-10 | Interphone with wireless control and Bluetooth audio transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321112999.XU CN219938343U (en) | 2023-05-10 | 2023-05-10 | Interphone with wireless control and Bluetooth audio transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219938343U true CN219938343U (en) | 2023-10-31 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321112999.XU Active CN219938343U (en) | 2023-05-10 | 2023-05-10 | Interphone with wireless control and Bluetooth audio transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219938343U (en) |
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2023
- 2023-05-10 CN CN202321112999.XU patent/CN219938343U/en active Active
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