Vehicle-mounted audio and video transmission system of fire fighting truck

Abstract

The utility model provides a vehicle-mounted audio and video transmission system of a fire fighting truck, which comprises a single chip microcomputer control module, a microphone module and an audio power amplifier module, and is characterized in that the single chip microcomputer control module is respectively connected with a switch module, an indicator light module, a linear voltage stabilizing module and a nixie tube control module; the switch module is connected with the microphone module, the microphone module is connected with the audio power amplifier module, and the linear voltage stabilization module is connected with the microphone module and the audio power amplifier module; after the scheme is adopted, the audio transmitted by the command center is played through the cooperation of all the modules; the external audio input interface and the audio output interface are arranged, so that the use effect is good, and the problems of shooting, image uploading and keeping in contact with a command center in the driving process are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of audio, in particular to an audio and video transmission system on a fire truck. Background Art

[0002] The fire command center should be able to grasp the driving conditions of the dispatched team and the conditions at the scene of the disaster in order to facilitate the dispatch in the first time. However, due to the limitation of the number of passengers in the dispatched vehicles, the fire station communicator needs to record the whole process, contact the caller, keep in touch with the command center, upload the on-site audio and video, and record the rescue scene. It is extremely urgent to design a device that can integrate various functions and free the hands of the communicator based on the existing equipment. Summary of the invention

[0003] The utility model aims to provide a fire truck-mounted audio and video transmission system with reasonable structure and good use effect.

[0004] To achieve the above-mentioned purpose, the technical solution provided by the utility model is: a fire truck on-board audio and video transmission system, which includes a single-chip control module, a microphone module, and an audio power amplifier module, wherein the single-chip control module is respectively connected to the switch module, the indicator light module, the linear voltage regulator module, and the digital tube control module; the switch module is connected to the microphone module, the microphone module is connected to the audio power amplifier module, and the linear voltage regulator module is connected to the microphone module and the audio power amplifier module; the switch module includes a second switch and a wiring terminal, wherein the first pin of the second switch is connected to one end of the first diode, the other end of the first diode is respectively connected to the fourth pin of the second switch and the collector of the first transistor, the emitter of the first transistor is grounded, the base of the first transistor is connected to one end of the twenty-fifth resistor, the other end of the twenty-fifth resistor is connected to the single-chip control module, the second pin of the second switch is respectively connected to the first pin, the second pin and the eighth pin of the microphone chip, the third pin of the second switch is connected to the fifth pin and the sixth pin of the wiring terminal and then connected to the twelfth pin of the microphone chip.

[0005] The linear voltage regulator module includes a linear voltage regulator chip, a thirty-third capacitor, and a third switch, wherein the second pin of the third switch is respectively connected to the microphone module and the audio amplifier module, the first pin of the third switch is sequentially connected to the thirty-first capacitor, the thirty-second capacitor, and the third pin of the linear voltage regulator chip, the other ends of the thirty-first capacitor and the thirty-second capacitor are interconnected and then grounded; the fourth pin of the linear voltage regulator chip is connected to one end of the thirty-third capacitor, the other end of the thirty-third capacitor is connected to one end of the thirty-fourth capacitor, the other end of the thirty-fourth capacitor is connected to one end of the thirty-third capacitor, and then they are respectively connected to the indicator light module, the digital tube control module, and the single-chip computer control module.

[0006] The indicator light module includes a first light-emitting diode and a twenty-second resistor, wherein one end of the first light-emitting diode is connected to the thirteenth pin of the digital tube control chip of the digital tube control module, and the other end of the first light-emitting diode is connected to the twenty-second resistor, the twenty-first resistor, the twentieth resistor, the nineteenth resistor, and one end of the eighteenth resistor in sequence, and the eighteenth resistor is connected to the microphone module, the audio power amplifier module, the single-chip control module, and the linear voltage regulator module; the other ends of the twenty-second resistor, the twenty-first resistor, the twentieth resistor, and the nineteenth resistor are respectively connected to the corresponding wiring pins in the digital tube control module through corresponding light-emitting diodes.

[0007] The microphone module includes a microphone chip and a microphone head, wherein the third pin of the microphone chip is connected to the third switch in the linear voltage stabilization module, the eighth pin and the twelfth pin of the microphone chip are connected to the switch module, the tenth pin of the microphone chip is respectively connected to the second pin of the microphone head and the emitter of the second transistor, the eleventh pin of the microphone chip is respectively connected to the first pin of the microphone head, one end of the second resistor, and one end of the third capacitor, the other end of the second resistor is respectively connected to one end of the third resistor and the linear voltage stabilization module, the other end of the third resistor is respectively connected to the collector of the second transistor, one end of the fourth capacitor, and one end of the first resistor, and the other end of the first resistor is respectively connected to the other end of the third capacitor and the base of the second transistor.

[0008] The audio power amplifier module includes an audio input port, an audio output port, and an audio power amplifier, wherein the audio input port is respectively connected to one end of the tenth capacitor and the other end of the fourth capacitor of the microphone module, the other end of the tenth capacitor is connected to one end of the sixth resistor, the other end of the sixth resistor is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to the third pin of the audio power amplifier; the fourth pin of the audio power amplifier is connected to one end of the ninth resistor, the other end of the ninth resistor is connected to one end of the eighth resistor, the other end of the eighth resistor is connected to one end of the seventh resistor, the other end of the seventh resistor is connected to one end of the eleventh capacitor, and the other end of the eleventh capacitor is connected to the audio output port; the first pin of the audio power amplifier is respectively connected to the second switch and one end of the tenth resistor, the other end of the tenth resistor is connected to the third switch in the linear voltage regulator module, the second pin of the audio power amplifier is connected to one end of the twelfth capacitor, and the other end of the twelfth capacitor is grounded; the fifth pin of the audio power amplifier is respectively connected to the negative pole pin of the speaker and the fifteenth capacitor, and the eighth pin of the audio power amplifier is respectively connected to the positive pole pin of the speaker and the fourteenth capacitor.

[0009] After adopting the above scheme, the utility model is used to play the audio transmitted from the command center through the cooperation of various modules; an external audio input interface and an audio output interface (transmitted to the audio playback device of the fire truck) are set, which has a good use effect and solves the problems of shooting and uploading images and keeping in touch with the command center during driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the single chip microcomputer control module of the utility model.

[0011] Figure 2 This is a schematic diagram of an audio power amplifier module of the present utility model.

[0012] Figure 3 It is a schematic diagram of the microphone module of the present utility model.

[0013] Figure 4 This is a schematic diagram of a linear voltage regulator module of the present utility model.

[0014] Figure 5 This is a schematic diagram illustrating the electronic components of the present utility model. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with all the accompanying drawings. Figure 1 Attachment 5, the fire truck onboard audio and video transmission system described in this embodiment is characterized in that: it includes a single-chip control module, a microphone module, and an audio power amplifier module, wherein the single-chip control module is respectively connected to the switch module, the indicator light module, the linear voltage regulator module, and the digital tube control module; the switch module is connected to the microphone module, the microphone module is connected to the audio power amplifier module, and the linear voltage regulator module is connected to the microphone module and the audio power amplifier module; the switch module includes a second switch K2 and a wiring terminal K-OUT1, wherein the first pin of the second switch K2 is connected to the first diode D1 The first end of the second switch K2 is connected to the first pin and the second pin of the wiring terminal K-OUT1 and the eighth pin of the microphone chip NONE respectively; the third pin of the second switch K2 is connected to the fifth pin and the sixth pin of the wiring terminal K-OUT1 and then to the twelfth pin of the microphone chip NONE.

[0016] The linear voltage regulator module includes a linear voltage regulator chip U3, a thirty-third capacitor C33, and a third switch SW3, wherein the second pin of the third switch SW3 is respectively connected to the microphone module and the audio power amplifier module, the first pin of the third switch SW3 is sequentially connected to the thirty-first capacitor C31, the thirty-second capacitor C32, and the third pin of the linear voltage regulator chip U3, the other ends of the thirty-first capacitor C31 and the thirty-second capacitor C32 are interconnected and then grounded; the fourth pin of the linear voltage regulator chip U3 is connected to one end of the thirty-third capacitor C33, the other end of the thirty-third capacitor C33 is connected to one end of the thirty-fourth capacitor C34, the other end of the thirty-fourth capacitor C34 is connected to one end of the thirty-third capacitor C33 and then respectively connected to the indicator light module, the digital tube control module, and the single-chip computer control module.

[0017] The indicator light module includes a first light-emitting diode DTR1 and a twenty-second resistor R22, wherein one end of the first light-emitting diode DTR1 is connected to the thirteenth pin of the digital tube control chip U2 of the digital tube control module, and the other end of the first light-emitting diode DTR1 is connected to the twenty-second resistor R22, the twenty-first resistor R21, the twentieth resistor R20, the nineteenth resistor R19, and one end of the eighteenth resistor R18 in sequence, and the eighteenth resistor R18 is connected to the microphone module, the audio power amplifier module, the single-chip control module, and the linear voltage stabilization module; the other ends of the twenty-second resistor R22, the twenty-first resistor R21, the twentieth resistor R20, and the nineteenth resistor R19 are respectively connected to the corresponding wiring pins in the digital tube control module through corresponding light-emitting diodes.

[0018] The microphone module includes a microphone chip NONE and a microphone MIC1, wherein the third pin of the microphone chip NONE is connected to the third switch K3 in the linear voltage regulator module, the eighth pin and the twelfth pin of the microphone chip NONE are connected to the switch module, the tenth pin of the microphone chip NONE is respectively connected to the second pin of the microphone MIC1 and the emitter of the second transistor, the eleventh pin of the microphone chip NONE is respectively connected to the first pin of the microphone MIC1, one end of the second resistor R2, and one end of the third capacitor C3, the other end of the second resistor R2 is respectively connected to one end of the third resistor R3 and the linear voltage regulator module, the other end of the third resistor R3 is respectively connected to the collector of the second transistor, one end of the fourth capacitor C4, and one end of the first resistor R1, and the other end of the first resistor R1 is respectively connected to the other end of the third capacitor C3 and the base of the second transistor.

[0019] The audio power amplifier module includes an audio input port, an audio output port, and an audio power amplifier U1, wherein the audio input port is respectively connected to one end of the tenth capacitor C10 and the other end of the fourth capacitor C4 of the microphone module, the other end of the tenth capacitor C10 is connected to one end of the sixth resistor R6, the other end of the sixth resistor R6 is connected to one end of the fifth resistor R5, the other end of the fifth resistor R5 is connected to one end of the fourth resistor R4, and the other end of the fourth resistor R4 is connected to the third pin of the audio power amplifier U1; the fourth pin of the audio power amplifier U1 is connected to one end of the ninth resistor R9, the other end of the ninth resistor R9 is connected to one end of the eighth resistor R8, and the other end of the eighth resistor R8 is connected to the seventh resistor R7 is connected at one end, the other end of the seventh resistor R7 is connected to one end of the eleventh capacitor C11, and the other end of the eleventh capacitor C11 is connected to the audio output port; the first pin of the audio power amplifier U1 is respectively connected to the second switch SW2 and one end of the tenth resistor R10, the other end of the tenth resistor R10 is connected to the third switch SW3 in the linear voltage regulator module, the second pin of the audio power amplifier U1 is connected to one end of the twelfth capacitor C12, and the other end of the twelfth capacitor C12 is grounded; the fifth pin of the audio power amplifier U1 is respectively connected to the negative pole pin SP-1 of the speaker and the fifteenth capacitor C15, and the eighth pin of the audio power amplifier U1 is respectively connected to the positive pole pin SP+ of the speaker and the fourteenth capacitor C14.

[0020] The above electronic components parameters refer to Figure 5 .

[0021] The design idea of ​​this embodiment is as follows:

[0022] (I) Develop a control circuit module with the following functions:

[0023] 1. When the on-duty vehicle starts, the high-definition surveillance camera automatically turns on and transmits the captured images to the command centers at all levels. When the on-duty vehicle is turned off, the high-definition surveillance camera automatically turns off.

[0024] 2. After the on-duty vehicle is started, the high-definition surveillance ball battery will be automatically charged;

[0025] 3. The sound of the transmitter is transmitted to the command centers at all levels through the high-definition control ball, and the command of the command center is transmitted to the cab through the image integrated management platform and the control ball;

[0026] 4. The module is equipped with a laptop speaker to play the audio transmitted from the command center; an external audio input interface and an audio output interface are set (to transmit to the audio playback device on the fire truck);

[0027] 5. The module is equipped with an RJ45 network port to modify the configuration of the roof high-definition control ball;

[0028] 6. The module is equipped with a WS20-12 core aviation waterproof connector to connect to the roof high-definition control ball for data transmission;

[0029] 7. The module is equipped with a passive anti-reverse plug-in power interface;

[0030] (2) Modify the internal control circuit of the high-definition control ball to facilitate the vehicle-mounted audio and video transmission box to control the power on and off of the high-definition control ball.

[0031] (3) A memory card is placed inside the high-definition surveillance ball to store recorded video.

[0032] (IV) Fix the high-definition surveillance ball on the top of the patrol vehicle to facilitate filming.

[0033] (V) Use customized connecting wires to connect the control module to the high-definition control ball; use customized power cables to draw power from the vehicle chassis to the control module.

[0034] This embodiment intends to solve the following problems:

[0035] (I) Provide accurate and detailed video data for battle review and summary. After using the vehicle-mounted audio and video transmission box, the high-definition control ball will automatically record the video when the fire truck starts, and the picture will be recorded with standard time. When summarizing the battle review, you can fully review the time when the vehicle was dispatched, the traffic conditions along the way, and the development of the disaster when arriving at the scene.

[0036] 2. Provide support for the command center to make decisions in the first time. The vehicle-mounted audio and video transmission box is developed based on the existing image comprehensive management platform of the National Bureau and the existing equipment of the detachment. After the fire truck is started, the command center can retrieve the high-definition control ball image on the roof of the dispatched vehicle through the existing image comprehensive management platform and remotely adjust the image angle, focal length, etc. At the same time, it can also communicate with the people in the car through the platform. The command center can obtain the driving conditions on the way and the first picture on the scene in the first time, providing strong support for rapid and scientific decision-making.

[0037] 3. Effectively solve the problem of grassroots communicators being busy during the dispatch process. During the dispatch process, due to the limited number of passengers in the vehicle, grassroots team station communicators need to take on the tasks of recording the entire process, contacting the caller, keeping in touch with the command center, uploading on-site audio and video, and recording the rescue scene. It is impossible to take care of all the tasks. The use of the vehicle-mounted audio and video transmission box simultaneously solves the problems of video recording, image uploading, and keeping in touch with the command center during driving.

[0038] The embodiments described above are only preferred embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention. Therefore, all changes made based on the shape and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Fire truck onboard audio and video transmission system, characterized by: The invention comprises a single-chip control module, a microphone module and an audio power amplifier module, wherein the single-chip control module is respectively connected with a switch module, an indicator light module, a linear voltage regulator module and a digital tube control module; the switch module is connected with the microphone module, the microphone module is connected with the audio power amplifier module, and the linear voltage regulator module is connected with the microphone module and the audio power amplifier module; the switch module comprises a second switch (K2) and a wiring terminal (K-OUT1), wherein a first pin of the second switch (K2) is connected with one end of a first diode (D1), and the other end of the first diode (D1) is respectively connected with a second The fourth pin of the switch (K2) is connected to the collector of the first transistor, the emitter of the first transistor is grounded, the base of the first transistor is connected to one end of the twenty-fifth resistor (R25), the other end of the twenty-fifth resistor (R25) is connected to the single-chip control module, the second pin of the second switch (K2) is respectively connected to the first pin and the second pin of the wiring terminal (K-OUT1) and the eighth pin of the microphone chip (NONE), the third pin of the second switch (K2) is connected to the fifth pin and the sixth pin of the wiring terminal (K-OUT1), and then connected to the twelfth pin of the microphone chip (NONE).

2. The fire truck onboard audio and video transmission system according to claim 1, characterized in that: The linear voltage stabilizing module comprises a linear voltage stabilizing chip (U3), a thirty-third capacitor (C33), and a third switch (SW3), wherein the second pin of the third switch (SW3) is respectively connected to the microphone module and the audio power amplifier module, the first pin of the third switch (SW3) is sequentially connected to the thirty-first capacitor (C31), the thirty-second capacitor (C32), and the third pin of the linear voltage stabilizing chip (U3), the other ends of the thirty-first capacitor (C31) and the thirty-second capacitor (C32) are interconnected and then grounded; the fourth pin of the linear voltage stabilizing chip (U3) is connected to one end of the thirty-third capacitor (C33), the other end of the thirty-third capacitor (C33) is connected to one end of the thirty-fourth capacitor (C34), the other end of the thirty-fourth capacitor (C34) is connected to one end of the thirty-third capacitor (C33), and then respectively connected to the indicator light module, the digital tube control module, and the single-chip computer control module.

3. The fire truck onboard audio and video transmission system according to claim 1, characterized in that: The indicator light module comprises a first light emitting diode (DTR1) and a twenty-second resistor (R22), wherein one end of the first light emitting diode (DTR1) is connected to the thirteenth pin of a digital tube control chip (U2) of a digital tube control module, and the other end of the first light emitting diode (DTR1) is connected to the twenty-second resistor (R22), the twenty-first resistor (R21), the twentieth resistor (R20), the nineteenth resistor (R19), and one end of an eighteenth resistor (R18) in sequence, and the eighteenth resistor (R18) is connected to a microphone module, an audio power amplifier module, a single-chip control module, and a linear voltage stabilizing module; and the other ends of the twenty-second resistor (R22), the twenty-first resistor (R21), the twentieth resistor (R20), and the nineteenth resistor (R19) are respectively connected to corresponding wiring pins in the digital tube control module through corresponding light emitting diodes.

4. The fire truck onboard audio and video transmission system according to claim 1, characterized in that: The microphone module comprises a microphone chip (NONE) and a microphone head (MIC1), wherein the third pin of the microphone chip (NONE) is connected to the third switch (K3) in the linear voltage stabilization module, the eighth pin and the twelfth pin of the microphone chip (NONE) are connected to the switch module, the tenth pin of the microphone chip (NONE) is respectively connected to the second pin of the microphone head (MIC1) and the emitter of the second triode, the eleventh pin of the microphone chip (NONE) is respectively connected to the first pin of the microphone head (MIC1), one end of the second resistor (R2), and one end of the third capacitor (C3), the other end of the second resistor (R2) is respectively connected to one end of the third resistor (R3) and the linear voltage stabilization module, the other end of the third resistor (R3) is respectively connected to the collector of the second triode, one end of the fourth capacitor (C4), and one end of the first resistor (R1), and the other end of the first resistor (R1) is respectively connected to the other end of the third capacitor (C3) and the base of the second triode.

5. The fire truck onboard audio and video transmission system according to claim 1, characterized in that: The audio power amplifier module comprises an audio input port, an audio output port, and an audio power amplifier (U1), wherein the audio input port is respectively connected to one end of a tenth capacitor (C10) and the other end of a fourth capacitor (C4) of a microphone module, the other end of the tenth capacitor (C10) is connected to one end of a sixth resistor (R6), the other end of the sixth resistor (R6) is connected to one end of a fifth resistor (R5), the other end of the fifth resistor (R5) is connected to one end of a fourth resistor (R4), and the other end of the fourth resistor (R4) is connected to the third pin of the audio power amplifier (U1); the fourth pin of the audio power amplifier (U1) is connected to one end of a ninth resistor (R9), the other end of the ninth resistor (R9) is connected to one end of an eighth resistor (R8), and the other end of the eighth resistor (R8) is connected to the seventh resistor (R9). 7), the other end of the seventh resistor (R7) is connected to one end of the eleventh capacitor (C11), and the other end of the eleventh capacitor (C11) is connected to the audio output port; the first pin of the audio power amplifier (U1) is respectively connected to the second switch (SW2) and one end of the tenth resistor (R10), the other end of the tenth resistor (R10) is connected to the third switch (SW3) in the linear voltage regulator module, the second pin of the audio power amplifier (U1) is connected to one end of the twelfth capacitor (C12), and the other end of the twelfth capacitor (C12) is grounded; the fifth pin of the audio power amplifier (U1) is respectively connected to the negative pole pin (SP-1) of the speaker and the fifteenth capacitor (C15), and the eighth pin of the audio power amplifier (U1) is respectively connected to the positive pole pin (SP+) of the speaker and the fourteenth capacitor (C14).

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