Audio acquisition equipment detection circuit and device and vehicle

Abstract

The utility model discloses an audio acquisition device detection circuit, an audio acquisition device detection device and a vehicle, a sampling circuit is used for collecting a voltage signal of an audio acquisition device, an amplification circuit is used for amplifying the voltage signal, and a controller obtains a working state detection table from a memory; the working state detection result of the audio collection equipment is obtained according to the working state detection table and the amplified voltage signal, real-time detection of the working state of the audio collection equipment can be achieved, a user can conveniently maintain and replace the audio collection equipment in an abnormal working state in time, and the use experience of the user is improved.

Description

Technical Field

[0001] The utility model relates to audio acquisition equipment, in particular to an audio acquisition equipment detection circuit, a device and a vehicle. Background Art

[0002] The audio acquisition device is used to collect the user's voice. The audio acquisition device converts the collected sound signals into electrical signals, so that the sound signals can be recognized and processed. Then the smart device can perform corresponding interactive control according to the user's voice to realize voice interaction of the smart device.

[0003] In the related art, audio acquisition devices are usually set as accessories in smart devices. However, when the audio acquisition device fails, it is easy to cause the voice interaction function of the smart device to not be used normally, affecting the user experience. When testing the audio acquisition device, it is usually necessary to remove the audio acquisition device in the smart device and connect it to the diagnostic instrument to realize fault detection, which is inconvenient. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide an audio acquisition device detection circuit, device and vehicle, which can detect the working status of the audio acquisition device in real time, thereby facilitating users to repair the audio acquisition device in a timely manner.

[0005] In a first aspect, the utility model provides an audio acquisition device detection circuit, comprising: a memory, a controller, a sampling circuit and an amplifying circuit; the memory stores a working state detection table, the output end of the sampling circuit is connected to the input end of the amplifying circuit, and the output end of the amplifying circuit is connected to the controller;

[0006] The sampling circuit is used to collect the voltage signal of the audio collection device;

[0007] The controller is used to obtain a working state detection table from a memory, and obtain a working state detection result of the audio acquisition device according to the voltage signal amplified by the amplifier circuit and the working state detection table.

[0008] Optionally, the power supply circuit of the audio acquisition device includes a reverse connection protection circuit for preventing reverse connection of the power supply.

[0009] By utilizing a reverse connection protection circuit to avoid damage to circuit components or audio acquisition equipment caused by reverse power connection, reverse connection protection of the power supply circuit of the audio acquisition equipment is achieved, and the reliability of the detection circuit of the audio acquisition equipment is improved.

[0010] Optionally, the reverse connection protection circuit includes a first unidirectional conductive element, a first resistor, and a second unidirectional conductive element; the first unidirectional conductive element and the second unidirectional conductive element are unidirectionally conductive from the first end to the second end;

[0011] The first end of the first unidirectional conductive element is connected to a power supply, the second end of the first unidirectional conductive element is connected to the first end of the sampling element, the second end of the sampling element is connected to the first end of the first resistor, the second end of the first resistor is respectively connected to the audio acquisition device and the second end of the second unidirectional conductive element; the first end of the second unidirectional conductive element is grounded.

[0012] In the present application, the first unidirectional conducting element and the second unidirectional conducting element are used to ensure the unidirectional flow of current in the power supply circuit of the audio acquisition device. When the power supply is connected reversely, the diode is cut off and the power supply circuit cannot be formed, thereby realizing reverse power supply protection, avoiding damage to components in the power supply circuit and the audio acquisition device by reverse power supply, and improving the reliability of the detection circuit of the audio acquisition device.

[0013] Optionally, it also includes an alarm circuit, which is connected to the controller.

[0014] The alarm circuit is used to issue an abnormality prompt alarm according to the abnormal working signal of the controller.

[0015] In the embodiment of the present application, when the controller detects that the working status detection result of the audio acquisition device is an abnormal working state, it generates an abnormal working signal and sends it to the alarm circuit, so that the alarm circuit sends an abnormal prompt alarm according to the abnormal working signal, promptly reminding the user that the audio acquisition device has a fault, making it convenient for the user to replace and repair the audio acquisition device in time to avoid further damage to the equipment.

[0016] Optionally, the amplifying circuit includes a second resistor, a third resistor, a fourth resistor, a fifth resistor and an operational amplifier;

[0017] The positive input terminal of the operational amplifier is connected to the second end of the second resistor and the first end of the third resistor respectively, the first end of the second resistor is grounded, and the second end of the third resistor is connected to the first output terminal of the sampling circuit;

[0018] The negative input terminal of the operational amplifier is connected to the second end of the fourth resistor and the first end of the fifth resistor respectively, and the second end of the fifth resistor is connected to the second output terminal of the sampling circuit;

[0019] The output end of the operational amplifier is connected to the first end of the fourth resistor and the controller respectively.

[0020] In the embodiment of the present application, by using an operational amplifier to amplify the voltage signal output by the sampling circuit, the amplified voltage signal can better highlight the difference of the voltage signal, so that when determining the working state of the audio acquisition device based on the voltage signal, a more accurate working state detection result can be obtained, thereby improving the accuracy of the working state detection of the audio acquisition device.

[0021] Optionally, the sampling circuit includes a sampling element, and the sampling element is connected in series to a power supply circuit of the audio acquisition device.

[0022] In an embodiment of the present application, the sampling circuit collects the voltage signal of the power supply circuit of the audio acquisition device by utilizing a sampling element serially connected to the audio acquisition device, thereby detecting the working state of the audio acquisition device according to the voltage of the power supply circuit of the audio acquisition device. The sampling circuit has a simple circuit structure and a low sampling cost.

[0023] Optionally, a display device is further included, and the display device is connected to the controller;

[0024] The display device is used to receive the working state detection signal generated by the controller, and display the working state detection result of the audio acquisition device according to the working state detection signal.

[0025] In the embodiment of the present application, a display device is used to display the working status detection result of the audio acquisition device in real time, so that the user can timely understand the current working status of the audio acquisition device and perform repairs in time when the audio acquisition device fails.

[0026] In a second aspect, the utility model provides an audio acquisition device detection device, wherein the audio acquisition device includes at least two audio transmission channels, and the device includes at least two audio acquisition device detection circuits described in any one of the above items corresponding to the at least two audio transmission channels.

[0027] In a third aspect, the utility model provides an audio acquisition device detection device, the audio acquisition device includes at least two audio transmission channels, the device includes a memory, a controller, at least two sampling circuits corresponding to the at least two audio transmission channels, and at least two amplification circuits; the at least two amplification circuits are respectively connected to the controller.

[0028] In a fourth aspect, the utility model provides an audio acquisition device and an audio acquisition device detection circuit as described in any one of the above items.

[0029] The present application utilizes a sampling circuit to collect a voltage signal from an audio acquisition device, utilizes an amplification circuit to amplify the voltage signal, and a controller obtains a working status detection table from a memory, and obtains a working status detection result of the audio acquisition device according to the working status detection table and the amplified voltage signal, thereby realizing real-time detection of the working status of the audio acquisition device, making it convenient for users to promptly repair and replace audio acquisition devices that are in an abnormal working state, thereby improving user experience.

[0030] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of an audio acquisition device detection circuit in one embodiment of the utility model;

[0032] Figure 2 is a circuit diagram of an audio acquisition device detection circuit in one embodiment of the utility model;

[0033] Figure 3 It is a structural schematic diagram of an audio acquisition device detection device in one embodiment of the utility model;

[0034] Figure 4 It is a circuit diagram of an audio acquisition device detection device in one embodiment of the utility model;

[0035] Figure 5 It is a structural schematic diagram of an audio acquisition device detection device in another embodiment of the utility model. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present application clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] It should be clear that the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0039] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0040] In addition, in the description of this application, unless otherwise specified, "several" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0041] The voice interaction function allows users to free their hands. Through voice interaction, users can operate various devices more conveniently, which can effectively improve the user's operating experience.

[0042] As an important part of modern cars, smart cockpits have become an indispensable part of people's daily travel. Through voice interaction functions, drivers can operate vehicle systems more conveniently, improving driving safety and driving experience. In order to achieve a better voice interaction experience, smart cockpits are usually equipped with left and right external audio acquisition devices (microphone accessories) to provide better sound reception.

[0043] Improper user operation or unexpected situations can easily cause the audio capture device to malfunction. Once the audio capture device malfunctions, the user cannot use the voice interaction function, affecting the user's driving safety and driving experience.

[0044] In the related art, in order to troubleshoot the malfunction of the audio acquisition device of the smart cockpit, the user needs to remove the audio acquisition device from the vehicle body and use professional tools for further diagnosis and troubleshooting. The detection is difficult, the troubleshooting workload is large, and the detection is relatively inconvenient.

[0045] Therefore, in response to the above problems, the utility model provides an audio acquisition device detection circuit, which can detect the working status of the audio acquisition device in real time, so that the user can promptly understand whether the audio acquisition device is in normal working condition, and the user can promptly discover and solve the fault problems of the audio acquisition device, and determine that the voice interaction function can operate normally, thereby improving the user experience.

[0046] like Figure 1 As shown, the audio acquisition device detection circuit includes: a memory 110, a controller 120, a sampling circuit 130 and an amplifying circuit 140;

[0047] The memory 110 stores a working status detection table;

[0048] The output end of the sampling circuit 130 is connected to the input end of the amplifier circuit 140, and the output end of the amplifier circuit 140 is connected to the controller 120;

[0049] The controller 120 is used to obtain a working state detection table from the memory 110, and obtain a working state detection result of the audio acquisition device according to the voltage signal amplified by the amplifier circuit 140 and the working state detection table.

[0050] The memory 110 includes a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable programmable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0051] The controller 120 is the control core (Control Unit) of the audio acquisition device detection circuit, and is connected to various components of the audio acquisition device detection circuit through various interfaces and lines. The controller 120 calls the working status detection table pre-stored in the memory 110 and runs the pre-stored program or module to detect the working status of the audio acquisition device.

[0052] The controller 120 can be composed of an integrated circuit, for example, it can be composed of a single packaged integrated circuit, or it can be composed of multiple packaged integrated circuits with the same function or different functions, including one or more central processing units (CPU), microprocessors, digital processing chips, graphics processors and a combination of various control chips.

[0053] The working status detection table is used to detect the working status of the audio acquisition device. In the present application, the working status detection table may include multiple working states and multiple voltage ranges. One working state may correspond to one voltage range. The working status detection table may be a file pre-stored in the memory 110 by the user.

[0054] The sampling circuit 130 is used to collect a voltage signal of the audio collection device, and the voltage signal may be a working voltage signal of the audio collection device when it is working.

[0055] The amplifier circuit 140 is used to amplify the voltage signal collected by the sampling circuit 130, so as to highlight the voltage difference between different voltage signals and facilitate the identification and detection of the working state. The amplifier circuit 140 can use common amplifier elements such as transistors and operational amplifiers to achieve voltage signal amplification.

[0056] The controller 120 can determine the voltage range of the amplified voltage signal according to the amplified voltage signal and the working state detection table, and then determine the working state corresponding to the voltage signal to obtain the working state of the audio acquisition device.

[0057] In the embodiment of the present application, the working status detection result of the audio acquisition device may include open circuit, normal operation, short circuit to ground and short circuit to power supply. The user can quickly locate the cause of the failure of the audio acquisition device according to the working status detection result to improve the efficiency of fault repair.

[0058] Please refer to Table 1 below, which is a working status detection table in one embodiment:

[0059] Table 1 Working status detection table

[0060]

[0061]

[0062] In Table 1, each working state corresponds to a voltage value, and the voltage value can be used to determine the working state of the audio acquisition device. Specifically, when the voltage value of the voltage signal amplified by the amplifier circuit 140 is 0.851V or close to 0.851V, the working state of the audio acquisition device is determined to be open circuit; when the voltage value of the voltage signal amplified by the amplifier circuit 140 is 1.072V or close to 1.072V, the working state of the audio acquisition device is determined to be normal operation; when the voltage value of the voltage signal amplified by the amplifier circuit 140 is 1.68V or close to 1.68V, the working state of the audio acquisition device is determined to be short-circuited to the ground; when the voltage value of the voltage signal amplified by the amplifier circuit 140 is 0.11V or close to 0.11V, the working state of the audio acquisition device is determined to be short-circuited to the power supply.

[0063] The audio acquisition device detection circuit of the embodiment of the present application utilizes a sampling circuit to collect the voltage signal of the audio acquisition device, utilizes an amplification circuit to amplify the voltage signal, and a controller obtains a working status detection table from a memory, and obtains a working status detection result of the audio acquisition device according to the working status detection table and the amplified voltage signal, thereby realizing real-time detection of the working status of the audio acquisition device, making it convenient for users to promptly repair and replace audio acquisition devices in abnormal working states, thereby improving user experience.

[0064] The sampling circuit 130 is used to collect the voltage signal of the audio collection device. The voltage signal collected by the sampling circuit 130 may be the working voltage or the power supply voltage of the audio collection device.

[0065] The sampling circuit 130 may adopt an existing voltage sampling circuit to realize the collection of voltage signals, or, in one embodiment, the sampling circuit 130 includes a sampling element, and the sampling element is connected in series to the power supply circuit of the audio collection device.

[0066] In an embodiment of the present application, the sampling circuit collects the voltage signal of the power supply circuit of the audio acquisition device by utilizing a sampling element serially connected to the audio acquisition device, thereby detecting the working state of the audio acquisition device according to the voltage of the power supply circuit of the audio acquisition device. The sampling circuit has a simple circuit structure and a low sampling cost.

[0067] The power supply circuit of the audio collection device is used to supply power to the audio collection device. The power supply circuit may be a circuit formed by a power supply and a voltage input terminal of the audio collection device through a wire.

[0068] In a preferred embodiment, the power supply circuit of the audio acquisition device includes a reverse connection protection circuit for preventing reverse connection of the power supply.

[0069] The reverse connection protection circuit is used to implement reverse connection protection of the power supply to prevent the positive and negative poles of the power supply from being reversed and causing the components to burn out. The reverse connection protection circuit can use existing reverse connection protection circuits such as diodes, rectifier bridges, and MOS tubes to implement reverse connection protection of the power supply.

[0070] In the embodiment of the present application, a reverse connection protection circuit is used to avoid damage to circuit components or audio acquisition equipment caused by reverse power connection, thereby achieving reverse connection protection for the power supply circuit of the audio acquisition equipment and improving the reliability of the detection circuit of the audio acquisition equipment.

[0071] like Figure 2 As shown, in one embodiment, the reverse connection protection circuit includes a first unidirectional conductive element D1, a first resistor R2, and a second unidirectional conductive element; the first unidirectional conductive element D1 and the second unidirectional conductive element are unidirectionally conductive from the first end to the second end;

[0072] The first end of the first unidirectional conductive element D1 is connected to a power supply, the second end of the first unidirectional conductive element D1 is connected to the first end of the sampling element R1, the second end of the sampling element R1 is connected to the first end of the first resistor R2, the second end of the first resistor R2 is respectively connected to the audio acquisition device and the second end of the second unidirectional conductive element; the first end of the second unidirectional conductive element is grounded.

[0073] The first unidirectional conducting element D1 refers to an element that conducts unidirectionally from the first end to the second end. The current passing through the first unidirectional conducting element D1 flows from the first end to the second end. The first unidirectional conducting element D1 may be an element with unidirectional conducting characteristics, such as a diode.

[0074] The second unidirectional conducting element refers to an element that conducts unidirectionally from the first end to the second end. The current passing through the second unidirectional conducting element flows from the first end to the second end. The second unidirectional conducting element may be an element with unidirectional conducting characteristics, such as a diode.

[0075] In the embodiment of the present application, the sampling element R1 may be a sampling resistor, and the sampling resistor may be a precision resistor with high accuracy and high reliability, so as to achieve accurate detection of the working state of the audio acquisition device.

[0076] The first unidirectional conductive element D1 and the second unidirectional conductive element may be diodes. Figure 2 As shown, the audio acquisition device includes a first input terminal and a second input terminal, and the second unidirectional conductive element can be a diode D3-D4, wherein the anode of the diode D3-D4 is grounded, the cathode of the diode D3 is connected to the first input terminal of the audio acquisition device, and the cathode of the diode D4 is connected to the second input terminal of the audio acquisition device.

[0077] In the present application, the first unidirectional conducting element and the second unidirectional conducting element are used to ensure the unidirectional flow of current in the power supply circuit of the audio acquisition device. When the power supply is connected reversely, the diode is cut off and the power supply circuit cannot be formed, thereby realizing reverse power supply protection, avoiding damage to components in the power supply circuit and the audio acquisition device by reverse power supply, and improving the reliability of the detection circuit of the audio acquisition device.

[0078] like Figure 2 As shown, in one embodiment, the amplifier circuit 140 includes a second resistor R5, a third resistor R3, a fourth resistor R6, a fifth resistor R4 and an operational amplifier U1;

[0079] The positive input terminal of the operational amplifier U1 is connected to the second end of the second resistor R5 and the first end of the third resistor R3 respectively, the first end of the second resistor R5 is grounded, and the second end of the third resistor R3 is connected to the first output terminal of the sampling circuit;

[0080] The negative input terminal of the operational amplifier U1 is connected to the second end of the fourth resistor R6 and the first end of the fifth resistor R4 respectively, and the second end of the fifth resistor R4 is connected to the second output terminal of the sampling circuit;

[0081] The output end of the operational amplifier U1 is connected to the first end of the fourth resistor R6 and the controller respectively.

[0082] In the embodiment of the present application, by using an operational amplifier to amplify the voltage signal output by the sampling circuit, the amplified voltage signal can better highlight the difference of the voltage signal, so that when determining the working state of the audio acquisition device based on the voltage signal, a more accurate working state detection result can be obtained, thereby improving the accuracy of the working state detection of the audio acquisition device.

[0083] In one embodiment, the audio acquisition device detection circuit further includes a display device, and the display device is connected to the controller 120;

[0084] The display device is used to receive the working status detection signal generated by the controller 120, and display the working status detection result of the audio acquisition device according to the working status detection signal.

[0085] The controller 120 is used to obtain a working state detection table from the memory 110, generate a working state detection signal according to the voltage signal and the working state detection table, and send the signal to the display device;

[0086] The display device is used to display the working status of the audio acquisition device in real time. The display device can be a display screen or other device with display function.

[0087] The working state detection signal can be used to control the display device to display the working state detection result of the audio acquisition device. The working state detection signal can include whether the audio acquisition device fails and the cause of the failure when the failure occurs.

[0088] In the embodiment of the present application, a display device is used to display the working status detection result of the audio acquisition device in real time, so that the user can timely understand the current working status of the audio acquisition device and perform repairs in time when the audio acquisition device fails.

[0089] In one embodiment, the audio acquisition device detection circuit further includes an alarm circuit, and the alarm circuit is connected to the controller.

[0090] The alarm circuit is used to issue an abnormality prompt alarm according to the abnormal working signal of the controller.

[0091] The abnormal working signal can be a signal generated by the controller when it detects that the working state of the audio acquisition device is an abnormal working state (such as short circuit to ground, short circuit to power supply or open circuit, etc.). The abnormal working signal is used to control the alarm circuit to issue an abnormal prompt alarm.

[0092] The alarm circuit may include an indicator light and a buzzer. When the alarm circuit includes an indicator light, an abnormality warning alarm may be issued by controlling the light state of the indicator light, such as continuously flashing for a target time or keeping it always on; when the alarm circuit includes a buzzer, an abnormality warning alarm may be issued by controlling the buzzer to emit a specified sound, such as continuously emitting a "beeping" sound.

[0093] In the embodiment of the present application, when the controller detects that the working state of the audio acquisition device is an abnormal working state, it generates an abnormal working signal and sends it to the alarm circuit, so that the alarm circuit sends an abnormal prompt alarm according to the abnormal working signal, and promptly reminds the user that the audio acquisition device has a fault, which is convenient for the user to replace and repair the audio acquisition device in time to avoid further damage to the equipment. At the same time, it can avoid the inability to use the voice interaction function affecting the driving safety of the vehicle.

[0094] like Figure 3 As shown, the embodiment of the present application further provides an audio acquisition device detection device 200, the audio acquisition device includes at least two audio transmission channels, and the device 200 includes at least two of the above-mentioned audio acquisition device detection circuits 210 corresponding to the at least two audio transmission channels.

[0095] like Figure 4 As shown, the audio acquisition device includes two audio transmission channels R_MIC and L_MIC. Each audio transmission channel is correspondingly provided with an audio acquisition device detection circuit 210. The circuit structures of the two audio acquisition device detection circuits 210 are the same. The structure and working principle of the audio acquisition device detection circuit 210 can refer to the description of the above embodiments of the present application, which will not be repeated here.

[0096] like Figure 5 As shown, another embodiment of the present application further provides an audio acquisition device detection device 300, the audio acquisition device includes at least two audio transmission channels, the device 300 includes a memory 310, a controller 320, at least two sampling circuits 330 and at least two amplifying circuits 340; the at least two sampling circuits 330 and the at least two amplifying circuits 340 correspond to the at least two audio transmission channels 340; the output ends of the at least two amplifying circuits 330 are respectively connected to the controller 320.

[0097] In one embodiment, the audio acquisition device detection apparatus further includes a display device, wherein the display device is used to receive the working status detection signal of at least two audio transmission channels generated by the controller and display the working status detection result of at least two audio transmission channels of the audio acquisition device.

[0098] The audio acquisition device detection circuit and device of the present application can improve the stability and reliability of the voice interaction function, ensure that the driver can use the smart cockpit system smoothly, and the audio acquisition device detection circuit and device of the present application can accurately locate the fault problem of the audio acquisition device, reduce the difficulty and cost of maintenance and troubleshooting, avoid frequent disassembly and the use of professional tools, and improve the maintenance efficiency of the audio acquisition device; and the audio acquisition device detection circuit performs reverse connection protection on the power supply circuit of the audio acquisition device to prevent the audio acquisition device from being damaged, thereby extending the service life of the audio acquisition device, reducing the maintenance and replacement frequency of the audio acquisition device detection circuit, and improving the reliability of the audio acquisition device;

[0099] The present application also provides a vehicle, comprising an audio acquisition device and an audio acquisition device detection circuit as described in any one of the above items.

[0100] The audio acquisition device may be two-way external microphone accessories arranged on both sides of the vehicle's smart cockpit.

[0101] The vehicle of the present application can detect and display the working status of the audio acquisition device in real time, and issue an alarm in time for abnormal working conditions, thereby improving the stability and reliability of the vehicle's voice interaction function and providing the driver with a better driving experience.

[0102] The present invention is not limited to the above-mentioned embodiments. If various changes or modifications to the present invention do not depart from the spirit and scope of the present invention, and if these changes and modifications fall within the claims of the present invention and the scope of equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. An audio acquisition device detection circuit, characterized in that: include: Memory, controller, sampling circuit and amplifier circuit; The memory stores a working state detection table, the output end of the sampling circuit is connected to the input end of the amplifier circuit, and the output end of the amplifier circuit is connected to the controller; The sampling circuit is used to collect the voltage signal of the audio collection device; The controller is used to obtain a working state detection table from a memory, and obtain a working state detection result of the audio acquisition device according to the voltage signal amplified by the amplifier circuit and the working state detection table.

2. The audio acquisition device detection circuit according to claim 1, characterized in that: The power supply circuit of the audio acquisition device includes a reverse connection protection circuit for preventing reverse connection of the power supply.

3. The audio acquisition device detection circuit according to claim 2, characterized in that: The sampling circuit comprises a sampling element, and the sampling element is connected in series to the power supply circuit of the audio acquisition device.

4. The audio acquisition device detection circuit according to claim 3, characterized in that: The reverse connection protection circuit comprises a first unidirectional conductive element, a first resistor and a second unidirectional conductive element; the first unidirectional conductive element and the second unidirectional conductive element are unidirectionally conductive from the first end to the second end; The first end of the first unidirectional conductive element is connected to a power supply, the second end of the first unidirectional conductive element is connected to the first end of the sampling element, the second end of the sampling element is connected to the first end of the first resistor, the second end of the first resistor is respectively connected to the audio acquisition device and the second end of the second unidirectional conductive element; the first end of the second unidirectional conductive element is grounded.

5. The audio acquisition device detection circuit according to claim 1, characterized in that: It also includes an alarm circuit, which is connected to the controller. The alarm circuit is used to issue an abnormality prompt alarm according to the abnormal working signal of the controller.

6. The audio acquisition device detection circuit according to claim 1, characterized in that: The amplifying circuit comprises a second resistor, a third resistor, a fourth resistor, a fifth resistor and an operational amplifier; The positive input terminal of the operational amplifier is connected to the second end of the second resistor and the first end of the third resistor respectively, the first end of the second resistor is grounded, and the second end of the third resistor is connected to the first output terminal of the sampling circuit; The negative input terminal of the operational amplifier is connected to the second end of the fourth resistor and the first end of the fifth resistor respectively, and the second end of the fifth resistor is connected to the second output terminal of the sampling circuit; The output end of the operational amplifier is connected to the first end of the fourth resistor and the controller respectively.

7. The audio acquisition device detection circuit according to any one of claims 1 to 6, characterized in that: Also included is a display device, the display device is connected to the controller; The display device is used to receive the working state detection signal generated by the controller, and display the working state detection result of the audio acquisition device according to the working state detection signal.

8. An audio acquisition device detection device, characterized in that: The audio acquisition device includes at least two audio transmission channels, and the apparatus includes at least two audio acquisition device detection circuits according to any one of claims 1 to 7 corresponding to the at least two audio transmission channels.

9. An audio acquisition device detection device, characterized in that: The audio acquisition device includes at least two audio transmission channels, and the device includes a memory, a controller, at least two sampling circuits corresponding to the at least two audio transmission channels, and at least two amplification circuits; the sampling circuit is connected to the audio transmission channel, and the at least two amplification circuits are respectively connected to the controller.

10. A vehicle, characterized in that: The invention comprises an audio acquisition device and an audio acquisition device detection circuit as claimed in any one of claims 1 to 7.

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