CN110703154A - Socket test circuit and broadcast control method for socket test - Google Patents

Abstract

The invention belongs to the technical field of electricity, and particularly relates to a socket test circuit and a broadcast control method for socket test. The socket test circuit includes; the voice control device comprises a power supply module, a voltage detection module, a control module and a voice module, wherein the power supply module is used for providing power supply voltage; the voltage detection circuit detects the live wire voltage to generate a first detection signal, detects the zero wire voltage to generate a second detection signal, and detects the ground wire voltage to generate a third detection signal; the control module generates a voice signal according to the first detection signal, the second detection signal and the third detection signal; the voice module carries out voice broadcast according to the voice signal. The socket testing device has the advantages that the socket testing efficiency is improved, a tester can conveniently know the socket wiring condition so as to maintain in time, and the socket using convenience is improved.

Description

A socket test circuit and a broadcast control method for socket test

technical field

The invention belongs to the field of electrical technology, in particular to a socket test circuit and a broadcast control method for socket test.

Background technique

As an economical, practical, clean and easy to control and convert energy form, electrical energy is widely used in various fields such as power, lighting, chemistry, textiles, communications, broadcasting, etc., and plays an important role in our lives, such as in houses During the decoration, correct and reasonable electrical installation is required. The socket is a transfer interface device for various wirings. If the electrical installation has a circuit with a lack of zero wire and live wire, it will not be able to use; It may not be possible to cut off the real live wire circuit, causing danger; the misplacement of the live wire and the neutral wire will easily cause electric shock, so it is necessary to test the live wire, neutral wire and ground wire after installing the electrical equipment, so as to know whether the socket access line is correct and the connection is correct. Enter the electrical parameter value of each line to reduce the hidden danger of electricity safety.

At present, the socket testers on the market all use LEDs to indicate the status information, indicating the correctness and error of the socket access line. As a result, the test results must be judged by comparing the meter plate symbols on the tester, but the display space of the meter plate is limited. , the text symbols that can be displayed may not be clearly identifiable, some fonts are too small, or the operator is too far away from the equipment or the viewing angle is affected, it is impossible to see the above measurement comparison table at all, and it is time-consuming.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a socket test circuit and a socket test broadcast control method, which aims to solve the problem that the test socket cannot directly obtain the test result when the state of the test socket is connected to the line in the traditional technical solution, resulting in low test efficiency and low power consumption. The problem of poor security.

A socket test circuit, the socket includes a live wire interface, a neutral wire interface and a ground wire interface, which are respectively used to connect the live wire voltage, the neutral wire voltage and the ground wire voltage, and the socket test circuit includes:

Power modules for supplying the supply voltage;

a voltage detection circuit for detecting a live wire voltage to generate a first detection signal, for detecting a neutral wire voltage to generate a second detection signal, and for detecting a ground wire voltage to generate a third detection signal;

a control module connected to the voltage detection circuit for generating a voice signal according to the first detection signal, the second detection signal and the third detection signal;

A voice module connected with the control module and used for voice broadcast according to the voice signal.

In one embodiment, the power module includes:

Batteries for supplying the supply voltage;

A power switch connected to the power module for turning on or off the power supply voltage.

In one embodiment, the power module includes:

First diode, second diode, third diode, varistor, first resistor, second resistor, first transistor, first capacitor, first zener diode and second zener diode;

The anode of the first diode is connected to the live wire interface, the cathode of the first diode is connected to the first end of the varistor, and the anode of the second diode is connected to the neutral wire interface , the cathode of the second diode is connected to the first end of the varistor, the anode of the third diode is connected to the ground interface, and the cathode of the third diode is connected to the voltage The first end of the varistor, the second end of the varistor is connected to the collector of the first triode, and the first end of the first resistor is connected to the collector of the first triode and the third The base of a triode, the emitter of the first triode is grounded through the first capacitor, the base of the first triode is connected to the negative electrode of the first Zener diode, the third The anode of a Zener diode is the power supply voltage output end of the power module, the anode of the second Zener diode is grounded, and the cathode of the second Zener diode is connected to the anode of the first Zener diode.

In one embodiment, the voice module includes:

An audio processing unit connected with the control module for performing audio processing on the voice signal to generate an analog audio signal;

A speaker connected to the audio processing unit for broadcasting according to the analog audio signal.

In one embodiment, the audio processing unit includes:

an audio processing chip, a third resistor, a fourth resistor and a second capacitor;

The first signal input and output end of the audio processing chip and the second signal input and output end of the audio processing chip are the voice signal input end of the audio processing unit, and the third resistor is connected to the audio processing chip. between the first signal input and output end and the ground, the fourth resistor is connected between the second signal input and output end of the audio processing chip and the ground, the third signal input and output end of the audio processing chip and the The fourth signal input and output terminal of the audio processing chip is the analog audio signal output terminal of the audio processing unit, the power supply terminal of the audio processing chip is the power supply voltage input terminal of the audio processing unit, and the second capacitor is connected to between the power terminal of the audio processing chip and the ground.

In one embodiment, it also includes:

A display module for displaying according to a display signal;

The control module is further configured to generate the display signal according to the first detection signal, the second detection signal and the third detection signal.

In one embodiment, the display module includes:

an LED display unit for displaying the wiring state of the live wire interface, the neutral wire interface and the ground wire interface according to the display signal;

A digital display unit for displaying the live line voltage, the neutral line voltage and the ground line voltage according to the display signal.

In one embodiment, the control module includes: a control chip;

The first signal input and output end of the control chip is the first detection signal input end of the control module, the second signal input and output end of the control chip is the second detection signal input end of the control module, and the The third signal input and output end of the control chip is the third detection signal input end of the control module, the fourth input and output end of the control chip and the fifth input and output end of the control chip are the voice of the control module A signal output terminal, the power supply terminal of the control chip is the power supply voltage input terminal.

In one embodiment, the voltage detection module includes: a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, and a twelfth resistor;

The first end of the fifth resistor is the live wire voltage input end of the voltage detection module, the second end of the fifth resistor is the first detection signal output end of the voltage detection module, and the second end of the fifth resistor is the first detection signal output end of the voltage detection module. The second terminal is grounded through the sixth resistor, the first terminal of the eighth resistor is the zero line voltage input terminal of the voltage detection module, and the second terminal of the eighth resistor is the first terminal of the voltage detection module. Two detection signal output ends, the second end of the eighth resistor is grounded through the ninth resistor, and the first end of the eighth resistor is connected to the first end of the fifth resistor through the seventh resistor, so The first end of the eleventh resistor is the ground voltage input end of the voltage detection module, the second end of the eleventh resistor is the third detection signal output end of the voltage detection module, the tenth The second end of a resistor is grounded through the twelfth resistor, and the first end of the eleventh resistor is connected to the first end of the eighth resistor through the tenth resistor.

In addition, a broadcast control method for socket testing is also provided, and the broadcast control method includes:

Obtain the live line voltage, neutral line voltage and ground line voltage;

Obtain the wiring status of the live wire interface, the neutral wire interface and the ground wire interface according to the live wire voltage, the neutral wire voltage and the ground wire voltage;

Judging whether the connection state is a preset state;

If it is judged that the connection state is not the preset state, the voice broadcast of the connection is wrong;

If it is determined that the connection state is the preset state, voice broadcast is performed according to the live line voltage, the neutral line voltage and the ground line voltage.

The above socket test circuit, through the voltage detection module, the control module and the voice module, realizes that when the socket to be tested is tested, it can intuitively broadcast the wiring conditions of the live wire, neutral wire and ground wire of the socket to be tested, as well as intuitively broadcast the to-be-tested socket. Test the voltage value, leakage voltage value and voltage frequency value of the socket. Once there are adverse consequences such as socket leakage or incorrect wiring, the leakage safety can be judged in a timely and accurate manner, and the voice module can be controlled to broadcast the connection status, voltage value and voltage frequency value. The operator can broadcast the information directly and clearly through the voice. Knowing the wiring status and measured values of the socket improves the testing efficiency of the socket, and it is also convenient for the tester to easily understand the wiring of the socket for timely maintenance, which improves the convenience of the socket.

Description of drawings

1 is a schematic structural diagram of a socket test circuit provided by an embodiment of the present invention;

2 is a schematic structural diagram of a power module in a socket test circuit provided by an embodiment of the present invention;

3 is a schematic structural diagram of a socket test circuit provided by another embodiment of the present invention;

4 is a schematic structural diagram of a socket test circuit provided by another embodiment of the present invention;

FIG. 5 is an example circuit schematic diagram of a voltage conversion unit in the socket test circuit shown in FIG. 2;

FIG. 6 is an example circuit schematic diagram of the control module in the socket test circuit shown in FIG. 1;

FIG. 7 is an example circuit schematic diagram of the leakage switch test module in the socket test circuit shown in FIG. 1;

FIG. 8 is a specific flowchart of a broadcast control method for a socket test provided by an embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

FIG. 1 shows a schematic structural diagram of a socket test circuit provided by an embodiment of the present invention. As shown in FIG. 1, a socket test circuit includes a live wire interface, a neutral wire interface and a ground wire interface, which are respectively used to connect the live wire voltage , neutral line voltage and ground line voltage, the socket test circuit includes a power supply module 10 , a voltage detection module 20 , a control module 30 and a voice module 40 . The power supply module 10 is used to generate the power supply voltage according to the live wire voltage; the voltage detection module 20 is used to detect the live wire voltage to generate the first detection signal, to detect the neutral wire voltage to generate the second detection signal, and to detect the ground wire voltage to generate The voltage detection module 20 of the third detection signal; the control module 30 is connected to the voltage detection module 20 for generating a voice signal according to the first detection signal, the second detection signal and the third detection signal; the voice module 40 is connected to the control module 30, It is used for voice broadcast according to the voice signal.

In this embodiment, the voltage detection module 20 detects the voltage of the live wire, the neutral wire and the ground wire to detect the voltage of the socket under test, and outputs the detection result to the control module 30, and the control module 30 according to the first The detection signal, the second detection signal and the third detection signal generate voice signals, and control the voice module 40 to perform voice broadcasts on the connection status, voltage value and voltage frequency value. The operator can directly and clearly understand the connection status of the socket through the voice broadcast information. The measured value improves the test efficiency of the socket, and it is also convenient for the tester to easily understand the wiring condition of the socket for timely maintenance.

As shown in FIG. 2 , in one embodiment, the power module 10 includes a battery 11 and a power switch 12 . The battery 11 is used to provide a power supply voltage; the power switch 12 is connected to the battery 11 and used to turn on or off the power supply voltage. Specifically, the battery 11 is used to provide the working voltage of the control module 30 and the voice module 40. In practical applications, if the socket wiring is incorrect, there will be a wiring error that the live wire is not connected. The battery 11 supplies power to other modules in the circuit, so that the circuit cannot broadcast the connection status and detection value of the socket at this time when the live wire is not connected. When the socket test circuit is working normally, you can press the button to turn on the power switch 12, and the battery 11 outputs the power supply voltage to supply power to other modules. When the socket test circuit is not working, in order to save energy, you can press the button again to turn on the power switch. 12 Turn off, disconnect the supply voltage.

As shown in FIG. 3 and FIG. 5 , in one embodiment, the power supply module 10 includes a voltage conversion unit 13, and the voltage conversion unit 13 is configured to generate a supply voltage according to the live wire voltage, and the voltage conversion unit 13 includes: a first diode D1 , the second diode D2, the third diode D3, the varistor RT, the first resistor R1, the second resistor R2, the first transistor Q1, the first capacitor C1, the first Zener diode Z1 and the first Two Zener diodes Z2; the positive pole of the first diode D1 is connected to the live wire interface, the negative pole of the first diode D1 is connected to the first end of the varistor RT, the positive pole of the second diode D2 is connected to the neutral wire interface, the first The negative electrode of the second diode D2 is connected to the first end of the varistor RT, the positive electrode of the third diode D3 is connected to the ground wire interface, the negative electrode of the third diode D3 is connected to the first end of the varistor RT, and the varistor The second end of the resistor RT is connected to the collector of the first transistor Q1, the first resistor R1 is connected to the collector of the first transistor Q1 and the base of the first transistor Q1, the first transistor Q1 The emitter is grounded through the first capacitor C1, the base of the first transistor Q1 is connected to the cathode of the first Zener diode Z1, the anode of the first Zener diode Z1 is the power supply voltage output end of the voltage conversion unit 13, the second The anode of the Zener diode Z2 is grounded, and the cathode of the second Zener diode Z2 is connected to the anode of the first Zener diode Z1. In this implementation, the voltage conversion unit 13 performs step-down and voltage stabilization processing on the voltage connected to the live wire to generate a low-voltage stable power supply voltage to supply power to each functional module. Specifically, the input end of the voltage conversion unit 13 is connected to the live wire interface, zero The live wire interface and the ground wire interface only need to be connected to any one of the live wire interface, the neutral wire interface and the ground wire interface. The voltage conversion unit 13 performs voltage conversion on the connected live wire voltage to generate a power supply voltage to supply power to each internal function module , reducing the use of the auxiliary power supply 14, reducing the cost and improving the practicability of the device.

As shown in FIG. 3 , on the basis of the voltage conversion unit 13 , the power supply module 10 includes an auxiliary power supply 14 and a switch unit 15 . The auxiliary power supply 14 is used to provide the auxiliary power supply 14 of auxiliary voltage; the switch unit 15 is connected to the auxiliary power supply 14 and the voltage conversion unit 13 and is used to turn on or turn off the auxiliary voltage switch unit 15 according to the live wire voltage. In this embodiment, the voltage conversion unit 13 is used to convert the voltage of the live wire into a power supply voltage to supply power to each module in the circuit. However, in practical applications, if the socket wiring is incorrect, there will be a wiring error that the live wire is not connected. , at this time, the voltage conversion unit 13 has no voltage input and cannot generate the power supply voltage, and the circuit cannot broadcast or display the wiring status and detection value of the socket at this time. The operator cannot clearly understand the socket wiring of the socket, which reduces the test efficiency. In this embodiment, an auxiliary power supply 14 and a switch unit 15 are provided. The switch unit 15 detects whether a live wire is connected according to the first detection signal, the second detection signal and the third detection signal, and turns on or off the auxiliary voltage. When no live wire is connected, the auxiliary power supply 14 outputs auxiliary voltage through the switch unit 15 to provide the power required by other modules. Even in the case of no live wire access, the circuit can still accurately broadcast the wiring status of the socket, and the operator can clearly understand the socket wiring status of the socket, which improves the test efficiency. Among them, the switch module adopts switching devices such as MOS tubes.

As shown in FIG. 4, in one embodiment, the voice module 40 includes an audio processing unit and a speaker SP, and the audio processing unit is connected to the control module 30 for performing audio processing on the voice signal to generate an analog audio signal; the speaker SP is connected to the control module 30. The audio processing unit is connected for broadcasting according to the analog audio signal.

As shown in FIG. 5 , in one embodiment, the audio processing unit includes: an audio processing chip U2, a third resistor R3, a fourth resistor R4 and a second capacitor C2; a first signal input and output end SDI of the audio processing chip U2 And the second signal input and output end SDO of the audio processing chip U2 is the voice signal input end of the audio processing unit, the third resistor R3 is connected between the first signal input and output end SDI of the audio processing chip U2 and the ground, the fourth resistor R4 Connected between the second signal input and output terminal SDO of the audio processing chip U2 and the ground, the third signal input and output terminal PWM1 of the audio processing chip U2 and the fourth signal input and output terminal PWM2 of the audio processing chip U2 are the analog audio processing units. The audio signal output terminal, the power terminal of the audio processing chip U2 is the power supply voltage input terminal of the audio processing unit, and the second capacitor C2 is connected between the power terminal VDD of the audio processing chip U2 and the ground.

As shown in FIG. 4 , in one embodiment, the socket test circuit further includes: a display module 50 for displaying according to the display signal; the control module 30 is further configured to display according to the first detection signal, the second detection signal and the third detection signal The detection signal generates a display signal.

As shown in FIG. 6 , in one embodiment, the display module 50 includes: an LED display unit for displaying the wiring states of the live wire interface, the neutral wire interface and the ground wire interface according to the display signal; for displaying the live wire voltage according to the display signal , digital display unit for zero line voltage and ground line voltage. In this embodiment, the LED display unit includes a first LED light, a second LED light and a third LED light, and the wiring states of the live wire interface, the neutral wire interface and the ground wire interface are displayed by the on-off states of the three LED lights, For example, when the first LED light is on, the second LED light is on, and the third LED light is off, it means the wiring is correct; when the first LED light is off, the second LED light is on, and the third LED light is off, it means that the neutral line is not connected, The corresponding relationship between the on-off status of the specific LED display unit and the wiring status of the live wire interface, the neutral wire interface and the ground wire interface is as follows:

The first LED light Second LED light Third LED light Wiring status 1 Bright Bright extinguish correct 2 extinguish Bright extinguish Missing zero line 3 extinguish Bright Bright Fire ground wire dislocation 4 Bright extinguish Bright Fire zero line dislocation 5 Bright extinguish extinguish Missing ground

As shown in FIG. 6, in one embodiment, the control module 30 includes: a control chip U1; the first signal input and output terminal AI0 of the control chip U1 is the first detection signal input terminal of the control module 30, and the first signal input terminal of the control chip U1 is the first detection signal input terminal of the control chip U1. The second signal input and output terminal AI1 is the second detection signal input terminal of the control module 30, the third signal input and output terminal AI2 of the control chip U1 is the third detection signal input terminal of the control module 30, and the fourth input and output terminal of the control chip U1 PSDI and the fifth input and output end PSDO of the control chip U1 are the voice signal output end of the control module 30, and the power end of the control chip U1 is the power supply voltage input end.

As shown in FIG. 6, in one embodiment, the voltage detection module 20 includes: a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a third resistor The eleventh resistor R11 and the twelfth resistor R12; the first end of the fifth resistor R5 is the live wire voltage input end of the voltage detection module 20 , and the second end of the fifth resistor R5 is the first detection signal output end of the voltage detection module 20 , the second end of the fifth resistor R5 is grounded through the sixth resistor R6, the first end of the eighth resistor R8 is the zero line voltage input end of the voltage detection module 20, and the second end of the eighth resistor R8 is the voltage detection module 20. The second detection signal output end, the second end of the eighth resistor R8 is grounded through the ninth resistor R9, the first end of the eighth resistor R8 is connected to the first end of the fifth resistor R5 through the seventh resistor R7, and the eleventh resistor R11 The first end of the voltage detection module 20 is the ground voltage input end, the second end of the eleventh resistor R11 is the third detection signal output end of the voltage detection module 20, and the second end of the eleventh resistor R11 passes through the tenth The second resistor R12 is grounded, and the first end of the eleventh resistor R11 is connected to the first end of the eighth resistor R8 through the tenth resistor R10.

As shown in FIG. 7 , in one embodiment, the socket testing circuit further includes a leakage switch testing module; the leakage switch testing module is used to test and indicate the state of the leakage switch. The leakage switch test module includes a second transistor Q2, a test button SW1, a fourth diode D4, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a third Zener diode Z3 and an indicator Light LED1; the first end of the test button SW1 is connected to the live wire interface, the second end of the test button SW1 is connected to the ground wire interface through the thirteenth resistor R13, and the fourth diode D4 The anode of the test button SW1 is connected to the second end of the test button SW1, the cathode of the fourth diode D4 is connected to the collector of the second transistor Q2, and the fourteenth resistor R14 is connected to the second third transistor Q2. Between the collector of the transistor Q2 and the base of the second transistor Q2, the cathode of the third Zener diode Z3 is connected to the base of the second transistor Q2, and the anode of the third Zener diode Z3 is connected to the base of the second transistor Q2. The positive pole of the indicator light LED1, the negative pole of the indicator light LED1 is connected to the ground wire interface, and the fifteenth resistor R15 is connected to the emitter of the second transistor Q2 and the third Zener diode Z3 between the positive poles. In the case of confirming that the wiring is correct, press the button, the voltage of the live wire passes through the thirteenth resistor R13 to form a leakage current, and at the same time, the voltage of the live wire passes through the fourth diode D4 and the second transistor Q2 to step down and the third Zener diode Z3 stabilizes voltage, outputs a small voltage to the indicator LED1, and the indicator LED1 is on. If the leakage switch is triggered and tripped at this time, it means that the leakage switch is normal, ensuring the safety of electricity consumption. If the leakage switch is not triggered at this time, it means the leakage switch If the switch is invalid and the socket is unqualified, the leakage switch test module is used to test whether the leakage switch can protect the safe tripping of electricity, the circuit is simple, and the safety of electricity is guaranteed.

The following will briefly describe the working principle of a socket test circuit with reference to Figure 6:

The power supply module 10 generates a supply voltage to supply power to each internal functional module, and the wiring voltage (live line voltage, neutral line voltage and ground) of the tested socket are connected to the voltage dividing resistors (the fifth resistor R5 to the twelfth resistor R12) of the voltage detection module 11. Line voltage) is detected, and the first detection signal, the second detection signal and the third detection signal are correspondingly generated at the second end of the fifth resistor R5, the second end of the eighth resistor R8 and the second end of the eleventh resistor R11 , and correspondingly output to the control chip U1; the control chip U1 calculates, analyzes and judges according to the first detection signal, the second detection signal and the third detection signal to generate a voice signal, and the voice signal is passed through the fourth signal of the control chip U1. The input and output end PSDI and the fourth signal input and output end PSDO of the control chip U1 are output to the first signal input and output end SDI of the audio processing chip U2 and the second signal input and output end SDO of the audio processing chip U2; The signal generation analog audio signal is output to the speaker SP through the third signal input and output terminal PWM1 of the voice chip U2 and the fourth signal input and output terminal PWM2 of the voice chip U2, and the speaker SP is driven to voice broadcast the test results.

As shown in Figure 8, in addition, a broadcast control method for socket testing is also provided, wherein the broadcast control method includes:

In step S110, obtain the voltage of the live wire, the voltage of the neutral wire and the voltage of the ground wire;

In step S120, the wiring states of the live wire interface, the neutral wire interface and the ground wire interface are obtained according to the live wire voltage, the neutral wire voltage and the ground wire voltage;

In step S130, it is determined whether the connection state is a preset state

In step S140, if it is judged that the connection state is not the preset state, then the voice broadcast is connected incorrectly;

In step S150, if it is determined that the connection state is the preset state, voice broadcast is performed according to the voltage of the live wire, the voltage of the neutral wire and the voltage of the ground wire.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (10)

1. A socket test circuit, the socket comprises a live wire interface, a neutral wire interface and a ground wire interface, and the live wire interface, the neutral wire interface and the ground wire interface are respectively used to access the live wire, the neutral wire and the ground wire. line, characterized in that the socket test circuit includes: Power modules for supplying the supply voltage; a voltage detection circuit for detecting a live wire voltage to generate a first detection signal, for detecting a neutral wire voltage to generate a second detection signal, and for detecting a ground wire voltage to generate a third detection signal; a control module connected to the voltage detection circuit for generating a voice signal according to the first detection signal, the second detection signal and the third detection signal; A voice module connected with the control module and used for voice broadcast according to the voice signal. 2. The socket test circuit of claim 1, wherein the power module comprises: Batteries for supplying the supply voltage; A power switch connected to the power module for turning on or off the power supply voltage. 3. The socket test circuit according to claim 1, wherein the power module comprises: a power conversion unit; The power conversion unit includes a first diode, a second diode, a third diode, a varistor, a first resistor, a second resistor, a first transistor, a first capacitor, and a first voltage regulator a diode and a second Zener diode; The anode of the first diode is connected to the live wire interface, the cathode of the first diode is connected to the first end of the varistor, and the anode of the second diode is connected to the neutral wire interface , the cathode of the second diode is connected to the first end of the varistor, the anode of the third diode is connected to the ground interface, and the cathode of the third diode is connected to the voltage The first end of the varistor, the second end of the varistor is connected to the collector of the first triode, and the first end of the first resistor is connected to the collector of the first triode and the third The base of a triode, the emitter of the first triode is grounded through the first capacitor, the base of the first triode is connected to the negative electrode of the first Zener diode, the third The anode of a Zener diode is the power supply voltage output end of the power conversion unit, the anode of the second Zener diode is grounded, and the cathode of the second Zener diode is connected to the anode of the first Zener diode. 4. The socket test circuit of claim 1, wherein the voice module comprises: An audio processing unit connected with the control module for performing audio processing on the voice signal to generate an analog audio signal; A speaker connected to the audio processing unit for broadcasting according to the analog audio signal. 5. The socket test circuit of claim 4, wherein the audio processing unit comprises: an audio processing chip, a third resistor, a fourth resistor and a second capacitor; The first signal input and output end of the audio processing chip and the second signal input and output end of the audio processing chip are the voice signal input end of the audio processing unit, and the third resistor is connected to the audio processing chip. between the first signal input and output end and the ground, the fourth resistor is connected between the second signal input and output end of the audio processing chip and the ground, the third signal input and output end of the audio processing chip and the The fourth signal input and output terminal of the audio processing chip is the analog audio signal output terminal of the audio processing unit, the power supply terminal of the audio processing chip is the power supply voltage input terminal of the audio processing unit, and the second capacitor is connected to between the power terminal of the audio processing chip and the ground. 6. The socket test circuit of claim 1, further comprising: A display module for displaying according to a display signal; The control module is further configured to generate the display signal according to the first detection signal, the second detection signal and the third detection signal. 7. The socket test circuit of claim 6, wherein the display module comprises: an LED display unit for displaying the wiring state of the live wire interface, the neutral wire interface and the ground wire interface according to the display signal; A digital display unit for displaying the live line voltage, the neutral line voltage and the ground line voltage according to the display signal. 8. The socket test circuit according to claim 1, wherein the control module comprises: a control chip; The first signal input and output end of the control chip is the first detection signal input end of the control module, the second signal input and output end of the control chip is the second detection signal input end of the control module, and the The third signal input and output end of the control chip is the third detection signal input end of the control module, the fourth input and output end of the control chip and the fifth input and output end of the control chip are the voice of the control module A signal output terminal, the power supply terminal of the control chip is the power supply voltage input terminal. 9. The socket test circuit of claim 1, wherein the voltage detection module comprises: a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a tenth resistor a resistor and a twelfth resistor; The first end of the fifth resistor is the live wire voltage input end of the voltage detection module, the second end of the fifth resistor is the first detection signal output end of the voltage detection module, and the second end of the fifth resistor is the first detection signal output end of the voltage detection module. The second terminal is grounded through the sixth resistor, the first terminal of the eighth resistor is the zero line voltage input terminal of the voltage detection module, and the second terminal of the eighth resistor is the first terminal of the voltage detection module. Two detection signal output ends, the second end of the eighth resistor is grounded through the ninth resistor, and the first end of the eighth resistor is connected to the first end of the fifth resistor through the seventh resistor, so The first end of the eleventh resistor is the ground voltage input end of the voltage detection module, the second end of the eleventh resistor is the third detection signal output end of the voltage detection module, the tenth The second end of a resistor is grounded through the twelfth resistor, and the first end of the eleventh resistor is connected to the first end of the eighth resistor through the tenth resistor. 10. A broadcast control method for socket testing, wherein the broadcast control method comprises: Obtain the live line voltage, neutral line voltage and ground line voltage; Obtain the wiring status of the live wire interface, the neutral wire interface and the ground wire interface according to the live wire voltage, the neutral wire voltage and the ground wire voltage; Judging whether the connection state is a preset state; If it is judged that the connection state is not the preset state, the voice broadcast of the connection is wrong; If it is determined that the connection state is the preset state, voice broadcast is performed according to the live line voltage, the neutral line voltage and the ground line voltage.

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