Pickup system with self-checking function

Abstract

The utility model provides a pickup system with a self-checking function. The sound pick-up system comprises a sound pick-up and a self-checking device configured for the sound pick-up, and the self-checking device comprises a waveform generator used for generating sine waves; the sound production device is used for producing sound under the driving of the sine wave, so that a sound pickup picks up an audio signal, and related information of the audio signal is sent to a far end, so that the far end checks whether the picked-up audio signal is normal or not; and the waveform generator power supply control circuit is used for controlling the on-off of the waveform generator power supply. Therefore, the fault of the sound pickup can be automatically, timely and accurately detected, and the accuracy and reliability of sound collection are ensured.

Description

Technical Field

[0001] The utility model relates to the field of pickups, and in particular to a pickup system with a self-checking function. Background Art

[0002] A pickup, also known as a monitoring head, is a device used to collect on-site sounds. At present, it has been widely used in audio monitoring and has become one of the important components of the security system. Existing pickups generally consist of only a microphone and an audio amplification circuit. However, after the pickup is used, faults such as aging, damage, or wire disconnection may occur, resulting in the loss or serious distortion of recordings, making it difficult to restore many facts, and greatly reducing the reliability of the security system.

[0003] Therefore, a device that can conveniently, timely, and accurately detect pickup faults is needed to ensure the accuracy and reliability of sound collection in the security system. Summary of the Utility Model

[0004] The utility model designs a pickup system with a self-checking function and its self-checking method, which can conveniently, timely, and accurately detect pickup faults.

[0005] According to a first aspect, there is provided a pickup system with a self-checking function, the pickup system comprising: a pickup and a self-checking device configured for the pickup.

[0006] Wherein, the self-checking device comprises:

[0007] A waveform generator for generating a sine wave; a sound generating device for generating sound under the drive of the sine wave, so that the pickup picks up an audio signal, and relevant information of the audio signal is sent to a remote end for the remote end to check whether the picked-up audio signal is normal; a waveform generator power control circuit for controlling the on and off of the power supply of the waveform generator.

[0008] In some embodiments, the sound generating device is a buzzer.

[0009] In some embodiments, the waveform generator power control circuit comprises a PMOS transistor, a resistor, a diode, and a capacitor, and the connection mode of the waveform generator power control circuit is:

[0010] The drain of the PMOS transistor is connected to the positive pole of the system power supply of the pickup system, the source is connected to the positive pole of the power supply of the waveform generator, the negative pole of the diode is connected to the negative pole of the power supply of the waveform generator, and the positive pole is connected to the gate of the PMOS transistor.

[0011] The resistor is connected in parallel between the gate and the source of the PMOS transistor.

[0012] One end of the capacitor is connected to the gate of the PMOS transistor, and the other end is connected to the negative pole of the system power supply of the pickup system.

[0013] In some more specific embodiments, the waveform generator power control circuit further includes a protection circuit configured for the PMOS transistor, and two ends of the protection circuit are respectively connected to the gate and the source of the PMOS transistor.

[0014] In some more specific embodiments, the protection circuit includes a pair of diodes connected in reverse series, and two negative poles of the pair of diodes are respectively connected to the gate and the source of the PMOS transistor.

[0015] In some embodiments, the self-checking device further includes a working condition detection circuit, configured to receive the audio signal output by the pickup, compare the audio signal level value with a set level value, and output the result to a remote end.

[0016] In some embodiments, the pickup includes:

[0017] A microphone for picking up an audio signal; a microphone amplification circuit for amplifying the audio signal picked up by the microphone and transmitting the amplified audio signal to a remote end.

[0018] In some embodiments, the pickup system further includes:

[0019] A DCDC power control circuit for performing DCDC conversion on the power supply to provide positive and negative power supplies for the pickup system circuit.

[0020] According to a second aspect, there is provided a method for self-checking a pickup, the execution of the method is based on the pickup system as described in the first aspect, and the method includes:

[0021] When the pickup system is powered on, under the control of the waveform generator power control circuit, the power supply of the waveform generator is turned on, and the waveform generator generates a sine wave.

[0022] The sound generating device generates sound under the drive of the sine wave.

[0023] The pickup picks up an audio signal, and relevant information of the audio signal is transmitted to a remote end for the remote end to check whether the picked-up audio signal is normal.

[0024] In some embodiments, the waveform generator power control circuit controls the power supply of the waveform generator to automatically turn off after being turned on for a predetermined duration, and the sound generating device automatically stops after generating sound for the predetermined duration.

[0025] In some embodiments, after the pickup picks up an audio signal, it transmits the audio signal to the working condition detection circuit. The working condition detection circuit compares the level value of the audio signal output by the pickup with a level value threshold, and outputs the comparison result to a remote end for the remote end to check whether the picked-up audio signal is normal.

[0026] In summary, the pickup system with a self-checking function designed by the present utility model can automatically detect pickup faults when the pickup is powered on or powered on after a power-off, and can conveniently, timely and accurately detect pickup faults, ensuring the accuracy and reliability of sound collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 Shows a schematic structural diagram of a pickup system with a self-checking function provided by the present utility model;

[0029] Figure 2 Shows a power control circuit diagram of a waveform generator for a pickup system provided by the present utility model;

[0030] Figure 3 Shows a working condition detection circuit diagram for a pickup system provided by the present utility model;

[0031] Figure 4 Shows a flowchart of a pickup self-checking method provided by the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following describes the solutions provided in this specification in conjunction with the drawings.

[0033] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will describe the technical solutions in the embodiments of the present application in conjunction with the drawings.

[0034] In the description of the embodiments of the present application, words such as "exemplary", "for example" or "for illustration" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary", "for example" or "for illustration" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly, using words such as "exemplary", "for example" or "for illustration" aims to present relevant concepts in a specific manner.

[0035] In the description of the embodiments of the present application, the term "and / or" merely describes the association relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, B exists alone, and A and B exist simultaneously. Additionally, unless otherwise specified, the meaning of the term "plural" refers to two or more.

[0036] Furthermore, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The terms "include", "comprise", "have" and their variants all mean "including but not limited to", unless otherwise particularly emphasized in other ways.

[0037] The present utility model designs a pick-up system with a self-checking function and a self-checking method thereof, which can conveniently, timely and accurately detect faults of the pick-up. The pick-up system and the self-checking method implemented based on it will be introduced in turn below.

[0038] The pick-up system provided by the present utility model adds a self-checking function on the basis of the functions of a general pick-up. Specifically, the present utility model realizes the inspection of the working state of the pick-up at a remote end by adding a sound generating device and a supporting circuit in the circuit scheme, and judges whether the pick-up at the remote end is working normally. Thus, when it is judged that the pick-up is not working properly, the pick-up can be maintained in time, thereby ensuring the accuracy and reliability of sound collection.

[0039] A structure of the pick-up system with a self-checking function provided by the present utility model is as Figure 1 shown. The pick-up system mainly includes: a pick-up and a pick-up self-checking device.

[0040] Among them, the self-checking device includes:

[0041] 1) A waveform generator, which is used to generate a sine wave to drive the sound generating device to emit sound.

[0042] 2) A sound generating device, which is used to emit sound under the drive of the sine wave, so that the pick-up picks up an audio signal, and the relevant information of the audio signal is sent to the remote end for the remote end to check whether the picked-up audio signal is normal. In some embodiments, the sound generating device is a buzzer. In other embodiments, the sound generating device is an alarm.

[0043] 3) A waveform generator power control circuit, which is used to control the on / off of the power supply of the waveform generator.

[0044] In one design, a switch may be included in the waveform generator power control circuit, allowing an operator to control the power supply of the waveform generator by manually turning the switch on or off after the pickup system is powered on.

[0045] In another design, a control circuit is proposed that enables the sound - producing device to start sounding automatically after the pickup system is powered on and, after sounding for a certain period (e.g., 1 s), stop automatically, thereby achieving fully automated detection and improving the timeliness of detection.

[0046] The circuit diagram of this control circuit is as Figure 2 shown. The control circuit includes a PMOS transistor (Q), a resistor (R), a diode (D), and a capacitor (C), which are connected in the following manner:

[0047] 1) The drain of the PMOS transistor (Q) is connected to the positive pole of the system power supply of the pickup system, the source is connected to the positive pole of the power supply of the waveform generator, the negative pole of the diode (D) is connected to the negative pole of the power supply of the waveform generator, and the positive pole is connected to the gate of the PMOS transistor (Q).

[0048] 2) The resistor (R) is connected in parallel between the gate and the source of the PMOS transistor (Q).

[0049] 3) One end of the capacitor (C) is connected to the gate of the PMOS transistor (Q), and the other end is connected to the negative pole of the system power supply of the pickup system.

[0050] According to the waveform generator power control circuit as Figure 2 shown, when the system is powered on or powered on again after a power - off, the PMOS transistor is turned on, and the capacitor and the resistor form a charging circuit to supply power to the power supply of the waveform generator in the circuit, enabling the sound - producing device to sound under the drive of the sine wave generated by the waveform generator; when the capacitor is charged to the threshold voltage of the PMOS transistor, the PMOS transistor is turned off, stopping the power supply to the waveform generator, and thus the sound - producing device stops sounding. Thus, by using the Figure 2 control circuit shown, the function of automatically turning off the power supply of the waveform generator after conducting for a predetermined period is achieved.

[0051] Furthermore, in some embodiments, a protection circuit configured for the PMOS transistor (Q) is further included in the waveform generator power control circuit, and both ends of the protection circuit are respectively connected to the gate and the source of the PMOS transistor.

[0052] In some more specific embodiments, the protection circuit in the waveform generator power control circuit includes a pair of back - to - back diodes, and the two negative poles of this pair of diodes are respectively connected to the gate and the source of the PMOS transistor (Q).

[0053] In some embodiments, the self-checking device further includes a working condition detection circuit, which is configured to receive the audio signal output by the pickup, compare the level value of the audio signal with a threshold value of the level, and output the result to a remote end. If the level value of the audio signal output by the pickup is higher than the set value, it is considered that the pickup is normal.

[0054] The circuit diagram of this working condition detection circuit is as Figure 3 shown. The working condition detection circuit includes three modules: rectification and filtering, operational amplifier impedance matching, and comparator. After receiving the audio signal output by the pickup, the working condition detection circuit first rectifies and filters the audio signal through a diode and a capacitor, then performs impedance matching between the front and rear stages of the audio signal through an operational amplifier, and finally compares the level of the audio signal with a threshold value through a comparator and outputs the result to a remote end. If the level value of the audio signal output by the pickup is higher than the threshold value, it is considered that the pickup is normal.

[0055] The above mainly introduces the self-checking device in the pickup system. Next, the pickup in the pickup system will be introduced.

[0056] In some embodiments, the pickup includes:

[0057] a microphone, which is configured to pick up an audio signal;

[0058] a microphone amplification circuit, which is configured to amplify the audio signal picked up by the microphone and transmit the amplified audio signal to a remote end.

[0059] On the other hand, in some embodiments, the pickup system further includes:

[0060] a DCDC power control circuit, which is configured to perform DCDC conversion on the power supply to provide positive and negative power supplies for the circuits of the pickup system.

[0061] Based on the above pickup system, this specification further provides a method for self-checking a pickup. The flowchart of this method is as Figure 4 shown. The execution of this method includes:

[0062] Step 201: Power on the pickup system.

[0063] Step 202: Under the control of the waveform generator power control circuit, the waveform generator power is turned on to generate a sine wave.

[0064] Step 203: The sound generating device generates sound under the drive of the sine wave generated in step 202.

[0065] Step 204: The pickup picks up the audio signal generated in step 203, and the relevant information of the audio signal is transmitted to a remote end for the remote end to check whether the picked-up audio signal is normal.

[0066] In some embodiments, the waveform generator power control circuit controls the power supply of the waveform generator to automatically turn off after being turned on for a predetermined duration, and the sound generating device automatically stops after generating sound for the predetermined duration.

[0067] In some embodiments, relevant information of the audio signal is transmitted to a remote end, including: the working condition detection circuit compares the level value of the audio signal output by the pickup with a level value threshold, and outputs the comparison result to the remote end.

[0068] A specific implementation process of this method is as follows: when the pickup system is powered on, the waveform generator power control circuit controls the power supply of the waveform generator to automatically turn off after being turned on for 1 second. The waveform generator generates a sine wave for 1 second, drives the buzzer to emit a single-frequency sound for 1 second and then stops. The pickup picks up the 1-second single-frequency sound emitted by the sound generating device and transmits it to the remote end for the remote end to check whether the picked-up audio signal is normal.

[0069] It should be noted that during the normal power supply and use process of the pickup, the working state of the pickup can also be checked by briefly switching the system power supply and using this method.

[0070] The specific embodiments described above further elaborate on the purpose, technical solution and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solution of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pickup system with a self-checking function, characterized in that: The invention comprises a microphone and a self-test device configured for the microphone, wherein the self-test device comprises: A waveform generator for generating a sine wave; A sound generating device, used for generating sound under the driving of the sine wave, so that the microphone picks up an audio signal, and the relevant information of the audio signal is sent to a remote end, so that the remote end can check whether the picked-up audio signal is normal; The waveform generator power supply control circuit is used to control the on and off of the waveform generator power supply.

2. The pickup system according to claim 1, characterized in that The waveform generator power supply control circuit includes a PMOS transistor, a resistor, a diode and a capacitor; The drain of the PMOS transistor is connected to the positive electrode of the system power supply of the pickup system, the source is connected to the positive electrode of the power supply of the waveform generator, the cathode of the diode is connected to the negative electrode of the power supply of the waveform generator, and the anode is connected to the gate of the PMOS transistor; The resistor is connected in parallel between the gate and the source of the PMOS transistor; One end of the capacitor is connected to the gate of the PMOS transistor, and the other end is connected to the negative electrode of the system power supply of the pickup system.

3. The pickup system according to claim 2, characterized in that The waveform generator power supply control circuit further includes a protection circuit configured for the PMOS transistor, and two ends of the protection circuit are respectively connected to the gate and source of the PMOS transistor.

4. The pickup system according to claim 3, wherein: The protection circuit includes a pair of diodes connected in reverse series, wherein two anodes of the pair of diodes are respectively connected to the gate and source of the PMOS transistor.

5. The pickup system according to claim 1, characterized in that The self-checking device also includes a working condition detection circuit, which is used for receiving the audio signal output by the microphone, comparing the level value of the audio signal with the level value threshold, and outputting the comparison result to the remote end.

6. The pickup system according to claim 1, characterized in that The pickup comprises: A microphone for picking up audio signals; The microphone amplifier circuit is used to amplify the audio signal picked up by the microphone and transmit the amplified audio signal to a remote end.

7. The pickup system according to claim 1, characterized in that The sound-generating device is a buzzer.

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