WO2021258731A1 - Ground wire and neutral line abnormity detection method and device, - Google Patents

Abstract

A ground wire and neutral line abnormity detection method and device, a system and a readable storage medium. The method comprises: acquiring circuit state information (101), wherein the circuit state information is the current information of a detection circuit used for being in communication with a detected power socket, in a power polarity detector; determining whether the circuit state information is greater than a preset current or not (102), wherein the preset current characterizes the current magnitude of the open-circuit state of the detection circuit; if not, receiving voltage information corresponding to the live wire end of the detected power socket and acquired by an induction antenna (103); determining whether the voltage information is greater than a preset threshold or not (104); and if yes, generating first alarm information (105) for characterizing the open-circuit of a neutral line and a ground wire of the detected power socket. According to the provided ground wire and neutral line abnormity detection method, the power socket is detected in combination with the induction antenna, so that whether the power socket is in a ground wire and neutral line abnormity state or not is detected, electric field interference in the environment is eliminated by means of obtaining a self-inspection AD initial value for sampling and filtering, and the detection accuracy is ensured.

Description

Method, device, system and readable storage medium for detecting ground wire and zero wire abnormality Technical field

The invention relates to the field of power socket detection, in particular to a method, device, system and readable storage medium for detecting an abnormality of a ground wire zero wire.

Background technique

At present, 220V/50Hz power frequency electroscopes, or power socket polarity detectors, have at most the following seven functions: one is that the live wire, neutral wire, and ground wire are correctly wired; the other is the missing zero wire; the third is the missing Ground wire; fourth is the lack of fire wire; fifth is the fire wire and the ground wire are reversed; sixth is the fire wire and the neutral wire are reversed; seventh is the fire wire and the ground wire are reversed, and the ground wire is missing. But in fact, there are still two important states that no company can make a achievable product. One is that there is only a live wire, lacking a neutral wire, and a ground wire; the other is that the neutral wire is connected to the ground wire in reverse. In the detection of the above two conditions, the existing products are helpless.

The missed detection of the above two states is accompanied by great safety hazards; among them, when the power socket has only the live wire, the neutral wire and the ground wire are missing, the live wire still has electricity. Because the neutral wire and the ground wire are open, the current power supply The socket polarity detector cannot be connected, and this state cannot be detected at all. The user mistakenly believes that the socket is out of power. It is actually very dangerous to operate with confidence, and it is very likely to be shocked; and when the neutral wire of the power socket is connected to the ground When the wire is connected reversely, because it can be connected normally, the alarm indication of the current power socket polarity detector during detection is the same as the alarm indication when the power socket is normal, and the state cannot be recognized as well; Hazard, firstly, the connected equipment cannot operate, and secondly, there will be electric shock accidents on the equipment shell.

Furthermore, it is particularly important to detect whether the power socket is in the live wire only, the missing zero wire, the ground wire or the state of the neutral wire and the ground wire being reversed, and the above two states can be summarized as the abnormality of the ground wire and the neutral wire.

technical problem

How to overcome the above-mentioned technical problem that the power socket has hidden dangers due to the abnormality of the ground wire and the neutral wire.

Summary of the invention

In order to overcome the above technical problems, the present invention discloses a method, device, system and readable storage medium for detecting an abnormality of the ground wire and zero wire.

The technical solutions adopted by the present invention to achieve the above objectives are:

A method for detecting an abnormality of a ground wire and a neutral wire is applied to a power supply polarity detector, the power supply polarity detector having an inductive antenna, wherein the method includes:

Acquiring circuit state information, where the circuit state information is the current information of the detection circuit used in the power polarity detector to communicate with the tested power socket;

Judging whether the circuit state information is greater than a preset current, and the preset current represents the amount of current in the open-circuit state of the detection circuit;

If not, receive the voltage information corresponding to the live terminal of the tested power socket obtained from the inductive antenna;

Judging whether the voltage information is greater than a preset threshold;

If yes, first alarm information is generated, which is used to characterize the open circuit of the neutral wire and the ground wire of the power socket under test.

When judging whether the circuit state information is greater than the preset current, the method further includes:

If yes, output first control information, where the first control information is used to drive the detection circuit to disconnect from the neutral end of the tested power socket;

Receive a first comparison voltage obtained from an induction antenna, where the first comparison voltage is the induction measured by the induction antenna when only the live terminal and the ground terminal of the tested power socket are connected through the detection circuit Voltage;

Output second control information, the second control information is used to drive the detection circuit to restore the connection with the neutral terminal of the power socket under test and drive the detection circuit to disconnect the connection with the ground terminal of the power socket under test ；

Receive the second comparison voltage obtained from the induction antenna, the second comparison voltage is the induction measured by the induction antenna when only the live end and the neutral end of the tested power socket are connected through the detection circuit Voltage;

Determining whether the second comparison voltage is greater than the first comparison voltage;

If it is, the second alarm information is generated to indicate that the neutral wire and the ground wire of the power socket under test are connected reversely.

When receiving the voltage information corresponding to the live terminal of the tested power socket obtained from the inductive antenna, the method further includes:

Receiving a number of continuous sine period information obtained from an inductive antenna, where the sine period information is the instantaneous voltage at the live terminal of the power socket under test;

The voltage information is acquired according to the sine period information, where the voltage information is an average value of several sine period information.

Before judging whether the voltage information is greater than a preset threshold, the method further includes:

Acquiring an initial self-check AD value, where the initial self-check AD value is the AD value when the power polarity detector is not connected to the checked power source;

The preset threshold is generated according to the initial value of the self-check AD.

A device for detecting an abnormality of a ground wire and a neutral wire is applied to a power supply polarity detector, the power supply polarity detector having an inductive antenna, which includes:

A circuit state information acquisition module, configured to acquire circuit state information, where the circuit state information is the current information of the detection circuit used in the power polarity detector to communicate with the tested power socket;

The first condition judgment module is configured to judge whether the circuit state information is greater than a preset current, and the preset current represents the amount of current in the open-circuit state of the detection circuit;

A voltage information acquisition module for receiving voltage information corresponding to the live terminal of the power socket under test acquired from the inductive antenna;

The second condition judgment module is used to judge whether the voltage information is greater than a preset threshold;

The first information generating module generates the first alarm information, which is used to characterize the open circuit of the neutral wire and the ground wire of the power socket under test.

The device for detecting abnormality of the ground wire and zero wire further includes:

The first information output module is configured to output first control information, and the first control information is used to drive the detection circuit to disconnect the neutral end of the tested power socket;

The first comparison information acquisition module is configured to receive the first comparison voltage obtained from the induction antenna, and the first comparison voltage is when only the live terminal and the ground terminal of the tested power socket are connected through the detection circuit , The induced voltage measured by the inductive antenna;

The second information output module is used to output second control information. The second control information is used to drive the detection circuit to restore the connection with the neutral end of the tested power socket and drive the detection circuit to disconnect from the Connection of the ground terminal of the tested power socket;

The second comparison information acquisition module is configured to receive the second comparison voltage obtained from the induction antenna, and the second comparison voltage is only when the tested power socket live terminal and the neutral terminal are connected through the detection circuit , The induced voltage measured by the inductive antenna;

The third condition judgment module is used to judge whether the second comparison voltage is greater than the first comparison voltage;

The second information generating module is used to generate second alarm information, which is used to characterize the reverse connection of the neutral wire and the ground wire of the power socket under test.

Wherein, the voltage information acquisition module further includes:

The information acquisition sub-module is used to receive several continuous sine cycle information acquired from the induction antenna, where the sine cycle information is the instantaneous voltage at the live terminal of the tested power socket;

The information calculation sub-module is configured to obtain the voltage information according to the sine period information, and the voltage information is an average value of a number of the sine period information.

The device for detecting abnormality of the ground wire and zero wire further includes:

The AD value obtaining module is used to obtain the initial value of the self-check AD, the initial value of the self-check AD is the AD value when the power polarity detector is not connected to the checked power source, and the AD value is the analog-to-digital conversion Sampling value of the device;

The condition generating module is configured to generate the preset threshold according to the initial value of the self-check AD.

An abnormal detection system for a ground wire and a neutral wire, including:

Memory, used to store computer programs;

The processor is configured to execute the computer program to realize the steps of any one of the above-mentioned methods for detecting an abnormality of the ground wire and zero wire.

A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the steps of any of the above-mentioned methods for detecting an abnormality of the ground and zero line are realized.

Beneficial effect

The design of the invention is reasonable and ingenious, and the provided ground wire neutral wire abnormality detection device detects the power socket through the ground wire neutral wire abnormal detection method combined with the induction antenna; the method is perfect, and it realizes whether the power socket is in the live wire but lacks the neutral wire. , Ground wire, or the detection of the reverse state of the neutral wire and the ground wire, which is also applicable to the national standard 220V/50HZ standard, and the 110V power system of the United States/Japan; through the ground wire anomaly detection system, the ground wire is automatically completed Anomaly detection saves time and effort; and by acquiring the initial value of self-checking AD and sampling and filtering, the electric field interference in the environment is eliminated, and the measurement stability and detection accuracy of this method are improved.

Description of the drawings

The present invention will be further described below in conjunction with the drawings and embodiments.

FIG. 1 is a flowchart of a method for detecting an abnormality of a ground wire and a neutral wire in Embodiment 1 of the present invention;

2 is a flowchart of a method for replacing step 101 to step 103 in Embodiment 1 of the present invention;

FIG. 3 is a flow chart of a further method in Embodiment 1 of the present invention when receiving voltage information corresponding to the live terminal of the tested power socket obtained from an inductive antenna;

4 is a flowchart of a method for detecting an abnormality of a ground wire and a neutral wire in Embodiment 2 of the present invention;

5 is a schematic diagram of the structure of a ground zero wire abnormality detection device in Embodiment 1 of the present invention;

6 is a schematic diagram of the structure of a voltage information acquisition module in Embodiment 1 of the present invention;

Fig. 7 is a schematic circuit diagram of the socket detection device in the third embodiment of the present invention.

Embodiments of the present invention

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

The implementation environment involved in the present invention includes: a power socket to be detected, a power socket detection device, a processor installed in the power socket detection device that can execute a computer program, and an induction antenna installed in the power socket detection device.

The power socket to be tested is the most widely used three-hole socket on the market. Its upper face is grounded, the left hole is connected to the neutral wire, and the right hole is connected to the live wire. The standard can be the national standard: 220V/50HZ, or it can be suitable for the United States/Japan 110V power supply system in other regions. For the convenience of description, this application document defines the power socket to be inspected as the inspected socket, which means the same.

The power socket detection equipment is used to connect the tested power socket to detect whether it is in the following seven states (one is that the live wire, neutral wire, and ground wire are correctly wired; the second is the missing zero wire; the third is the missing ground wire; the fourth is the missing Fire wire; Fifth, the live wire and the ground wire are reversed; the sixth is the live wire and the neutral wire are reversed; the seventh is the live wire and the ground wire, and the ground wire is missing) testing equipment; it can be a power frequency electroscope, or the polarity of a power socket Detector. It is equipped with a detection circuit inside, and this detection circuit includes the live wire sub-circuit, the zero wire sub-circuit, the ground wire sub-circuit, the live wire sub-circuit, and the zero wire which are respectively connected to the live wire end, the neutral wire end and the ground wire end of the power socket. The line sub-circuit and the geodesic sub-circuit are connected in sequence to form a loop.

The processor arranged in the power socket detection device to execute the computer program can be a micro control unit (MCU) or a central processing unit.

The induction antenna set in the power socket detection device is an induction antenna that obtains voltage signals through electric field induction. It can be a single induction antenna set corresponding to the live end of the tested power socket, or it can be respectively corresponding to the live end of the tested power socket, The multiple inductive antennas provided at the neutral end and the ground end may also be inductive antennas that can be movably provided in the power socket detection device corresponding to the three sub-circuits.

In addition, the terms involved in each embodiment of the present invention will be explained one by one below. Hereinafter, referring to FIG. 1 to FIG. 7, the method for detecting an abnormality of a ground wire and a neutral wire provided by the present invention will be introduced and explained in detail through several specific embodiments.

In Embodiment 1, the specific application scenario is as follows: start the power socket detection device, and insert the test plug of the power socket detection device (power polarity detector) into the tested power socket.

Referring to FIG. 1, the present embodiment provides a method for detecting an abnormality of a ground wire and a neutral wire, which is applied to a power supply polarity detector, the power supply polarity detector has an inductive antenna, and the method includes:

Step 101: Acquire circuit state information, where the circuit state information is the current information of the detection circuit used in the power polarity detector to communicate with the tested power socket;

Wherein, the current information is the amount of current of the detection circuit, which is measured by a Hall sensor (or current clamp) provided in the power supply polarity detector corresponding to the detection circuit.

Step 102: Determine whether the circuit state information is greater than a preset current, and the preset current represents the amount of current in the open-circuit state of the detection circuit;

Among them, the amount of current in the open circuit state is generally 0A.

Step 103, if not, receive the voltage information corresponding to the live terminal of the tested power socket obtained from the inductive antenna;

Step 104: Determine whether the voltage information is greater than a preset threshold;

Among them, because the measurement accuracy of the inductive antenna is not high, and the preset threshold in this embodiment is set to 90V, the method can be applied to 110V power supplies such as the United States/Japan, in addition to the national standard 220V/50HZ system. system.

Step 105: If yes, generate first alarm information, which is used to characterize the open circuit of the neutral wire and the ground wire of the power socket under test.

The first alarm information is an acoustic and/or electrical signal, which is displayed or sent by the power polarity detector.

Among them, step 101 to step 103 can also be replaced with:

Step 101', receiving the first voltage pre-check information, the second voltage pre-check information, and the third voltage pre-check information acquired from the inductive antenna, where the first voltage pre-check information is that the inductive antenna is close to the firing line The second voltage pre-check information is the measured value of the inductive antenna close to the zero line sub-circuit, and the third voltage pre-check information is the inductive antenna close to the geodesic The measured value of the line sub-circuit.

Step 102', judging whether the first voltage pre-check information, the second voltage pre-check information, and the third voltage pre-check information are all less than the electrification threshold;

Specifically, in this embodiment, the charging threshold is 90V. On the one hand, the effective value of the voltage when the current power socket is powered is at least 110V, and the measured value of the inductive antenna is the instantaneous voltage and the inductive antenna. Its own measurement error; on the other hand, it can avoid the interference of micro current, disturb the measurement result, and improve the anti-interference ability of the present invention. Furthermore, it is most appropriate to set the charging threshold at 90V or within a range where it fluctuates 5V up and down.

Step 103', if yes, receive the voltage information corresponding to the live terminal of the tested power socket obtained from the inductive antenna.

It should be noted that when the inductive antenna is respectively close to the live line sub-circuit, the zero line sub-circuit, and the ground line sub-circuit, it is combined with a push block, a telescopic block, etc. through a paddle, a turntable, a knob, etc. The retractable mechanism adjusts the back to push it to the live line sub-circuit, the zero line sub-circuit, and the ground line sub-circuit; similarly, when the inductive antenna obtains the voltage information corresponding to the live terminal of the power socket under test, the inductive antenna Close to the live wire end of the power socket under test, it is pushed to the power socket detection device (power polarity detector) by means of an adjustment mechanism such as a paddle, turntable, knob, etc., combined with expansion mechanisms such as a push block and a telescopic block. ) In the live wire connection end of the test plug. During detection, the induction antenna and the live wire end have at least an electric gap greater than 1 mm, which can resist the electric field signal of the live wire 1KV, so as to avoid the electric field signal of the live wire from being too large to cause safety hazards during measurement. In this embodiment, the above-mentioned electrical gap is realized by an insulating housing or a limiting structure that is effective corresponding to the telescopic mechanism.

Furthermore, the efficiency of step 101' to step 103' is lower than that of step 101 to step 103, and the time consuming to obtain circuit state information is slightly longer, but compared to step 101 to step 103, 101' to step 103' can be saved The configuration of the Hall sensor reduces the requirements for the cost of the equipment. According to the market demand, the method of the present invention can provide two different price products to more comprehensively cater to the market demand.

Further, the live line sub-circuit, the neutral line sub-circuit, and the ground line sub-circuit are separated by a mica sheet to ensure that the inductive antenna is acquiring the first comparison voltage, the second comparison voltage, and the first voltage pre-check information , The second voltage pre-check information and the third voltage pre-check information are not interfered by the electric field generated by other circuits.

When judging whether the circuit state information is greater than the preset current, the method further includes:

Step 106: If yes, output first control information, where the first control information is used to drive the detection circuit to disconnect from the neutral end of the tested power socket;

Specifically, a first switch, a second switch, and a third switch are respectively provided on the live line sub-circuit, the zero line sub-circuit, and the ground line sub-circuit for controlling the connection and connection between the live line sub-circuit and the live line. No, control whether the sub-circuit of the zero-measuring line is connected to the neutral line, and control whether the sub-circuit of the earthing line is connected to the ground line or not.

Specifically, in this embodiment, the first switch, the second switch, and the third switch are all mos switches. When the first control signal output in step 106 is received, the second switch is turned off, so that the control circuit is The neutral end of the power socket is disconnected.

Step 107: Receive a first comparison voltage obtained from an induction antenna. The first comparison voltage is measured by the induction antenna when only the live terminal and the ground terminal of the tested power socket are connected through the detection circuit. The induced voltage;

Specifically, the resistance values of the live line sub-circuit, the zero line sub-circuit, and the ground line sub-circuit are the same, thereby ensuring that the live line sub-circuit, the zero line sub-circuit, and the ground line sub-circuit are connected to the same When the voltage is applied, the electric field generated is the same.

Furthermore, the first comparison voltage is the induced voltage measured when only the live wire end and the ground wire end of the tested power socket are connected through the detection circuit and the inductive antenna is close to the live wire sub-circuit. The measured induced voltage at this time can be regarded as the year-on-year voltage difference between the live terminal and the ground terminal of the tested power socket.

Step 108: Output second control information. The second control information is used to drive the detection circuit to restore the connection with the neutral end of the power socket under test and to drive the detection circuit to disconnect from the ground of the power socket under test. Wire end connection;

Specifically, in this embodiment, when the second control information output in step 108 is received, the second switch is closed and the third switch is opened, so that the connection between the detection circuit and the neutral end of the tested power socket is restored, so The connection of the ground terminal of the power socket under test is disconnected.

Step 109: Receive a second comparison voltage obtained from an inductive antenna. The second comparison voltage is measured by the inductive antenna when only the live and neutral ends of the tested power socket are connected through the detection circuit. The induced voltage;

Similarly, the resistance values of the live line sub-circuit, the zero line sub-circuit, and the ground line sub-circuit are the same, which can ensure that the live line sub-circuit, the zero line sub-circuit, and the ground line sub-circuit are connected to the same When the voltage is applied, the electric field generated is the same.

Furthermore, the second comparison voltage is the induced voltage measured when only the live end and the neutral end of the tested power socket are connected through the detection circuit and the inductive antenna is close to the zero line sub-circuit. The measured induced voltage at this time can be regarded as the year-on-year voltage difference between the live terminal and the neutral terminal of the tested power socket.

Step 110: Determine whether the second comparison voltage is greater than the first comparison voltage;

Step 111: If yes, generate second alarm information, which is used to indicate that the neutral wire and the ground wire of the power socket under test are connected reversely. The first alarm information is an acoustic and/or electrical signal, which is displayed or sent by the power polarity detector.

Specifically, since the potential on the ground wire of the power socket is always 0, although its neutral wire is also grounded, due to various reasons such as humidity and distance, the potential of the neutral wire terminal in practical applications will not be completely 0, and the potential The greater the difference, the greater the measured voltage; and because the potential on the live wire is constant, the voltage between the live wire and the ground of the tested power socket must be greater than the voltage between the live wire and the neutral wire. To be big. Furthermore, it can be concluded that under normal circumstances, the first comparison voltage must be greater than the second comparison voltage; therefore, when the second comparison voltage is greater than the first comparison voltage, it can be determined that the tested power supply The neutral and ground wires of the socket are connected reversely.

When receiving the voltage information corresponding to the live terminal of the tested power socket obtained from the inductive antenna, the method further includes:

Step 103A, receiving a number of continuous sinusoidal period information obtained from an inductive antenna, where the sinusoidal period information is the instantaneous voltage at the live terminal of the power socket under test;

Specifically, in this embodiment, several continuous sinusoidal period information is 10 consecutively measured instantaneous voltages, where the 10 sinusoidal period information is continuous, which can better present the change of the power socket voltage; and A good balance between signal smoothness and sensitivity makes the filtering effect significantly improved.

Step 103B: Acquire the voltage information according to the sine period information, where the voltage information is an average value of several sine period information.

Specifically, in this embodiment, the voltage information is an average value obtained by removing a maximum value and a minimum value of the sine period information.

Among them, step 103A to step 103B cooperate to play a sampling filtering effect, which improves the detection stability of the present invention, thereby improving the detection accuracy.

Further, the steps 103A to 103B can also be replaced by the following methods:

One is to determine the maximum allowable deviation value (set as A) for the two sensing antenna samples, and judge each time a new sample value is detected: if the difference between the current value and the previous value is less than or equal to A, the current value is valid; If the difference between the current value and the last value is greater than A, the current value is invalid, and the last value is used instead of the current value. The current value is used as the voltage information. The advantage of this method is that it can effectively overcome the pulse interference caused by accidental factors.

The second is to continuously take N sensing antenna sampling values (N is an odd number), arrange the N sampling values in order of magnitude, and take the intermediate value as the voltage information.

The third is to generate a queue based on the sampling values of N consecutive induction antennas. The length of the queue is fixed to N. Each time a new data is sampled through the induction antenna and put into the end of the queue, and the original data at the head of the queue is discarded. Perform an arithmetic average operation on the N data of, and take the calculated value as the voltage information. The advantage of this method is that it has good suppression of external interference and high smoothness.

Before judging whether the voltage information is greater than a preset threshold, the method further includes:

Step 104A: Acquire an initial self-check AD value, where the initial self-check AD value is the AD value when the power source polarity detector is not connected to the checked power source;

Specifically, the AD value refers to ADC conversion, which is a sampling value of the analog-to-digital converter. Specifically in this embodiment, the initial value of the self-check AD is the sampled value obtained by the power polarity detector during the power-on self-check. Compared with the subsequent restart of ADC sampling, it saves energy and improves efficient.

Step 104B: Generate the preset threshold according to the initial value of the self-check AD.

Specifically, the preset threshold=the initial value of self-check AD+the initial value, where the initial value is 90V. On the one hand, the effective value of the voltage when the current power socket is powered is at least 110V, and at the same time Taking into account the measured value of the induction antenna as the instantaneous voltage and the measurement error of the induction antenna itself, the initial value is set to 90V, which can be applied to the detection of the national standard 220V power socket and the 110V power system such as the United States/Japan.

Furthermore, by obtaining the initial value of the self-checking AD, the electric field interference in the environment is eliminated, which further improves the measurement stability of this method and improves the detection accuracy.

A device for detecting an abnormality of a ground wire and a neutral wire is applied to a power supply polarity detector, the power supply polarity detector having an inductive antenna, which includes:

The circuit state information acquisition module 601 is configured to acquire circuit state information, where the circuit state information is the current information of the detection circuit used in the power polarity detector to communicate with the tested power socket;

The first condition determination module 602 is configured to determine whether the circuit state information is greater than a preset current, and the preset current represents the amount of current in the open-circuit state of the detection circuit;

The voltage information acquisition module 603 is configured to receive the voltage information corresponding to the live terminal of the tested power socket obtained from the inductive antenna;

The second condition determination module 604 is configured to determine whether the voltage information is greater than a preset threshold;

The first information generating module 605 generates first alarm information, which is used to characterize the open circuit of the neutral wire and the ground wire of the power socket under test.

The device for detecting abnormality of the ground wire and zero wire further includes:

The first information output module 606 is configured to output first control information, and the first control information is used to drive the detection circuit to disconnect the neutral end of the tested power socket;

The first comparison information acquisition module 607 is configured to receive a first comparison voltage obtained from an induction antenna, where only the live terminal and the ground terminal of the tested power socket are connected through the detection circuit , The induced voltage measured by the inductive antenna;

The second information output module 608 is configured to output second control information, which is used to drive the detection circuit to restore the connection with the neutral end of the power socket under test and to drive the detection circuit to disconnect from the neutral end of the power socket under test. Describe the connection of the ground terminal of the tested power socket;

The second comparison information acquisition module 609 is configured to receive a second comparison voltage obtained from an induction antenna, where only the live terminal and the neutral terminal of the tested power socket are connected through the detection circuit , The induced voltage measured by the inductive antenna;

The third condition determination module 610 is configured to determine whether the second comparison voltage is greater than the first comparison voltage;

The second information generating module 611 is configured to generate second alarm information, which is used to characterize the reverse connection of the neutral wire and the ground wire of the power socket under test.

Wherein, the voltage information acquisition module 603 further includes:

The information acquisition sub-module 603a is configured to receive a number of continuous sinusoidal period information obtained from the inductive antenna, where the sinusoidal period information is the instantaneous voltage at the live terminal of the tested power socket;

The information calculation sub-module 603b is configured to obtain the voltage information according to the sine period information, where the voltage information is an average value of a number of the sine period information.

The device for detecting abnormality of the ground wire and zero wire further includes:

The AD value acquisition module 604a is configured to acquire the initial value of the self-check AD, where the initial value of the self-check AD is the AD value when the power source polarity detector is not connected to the power source to be checked;

The condition generating module 604b is configured to generate the preset threshold according to the initial value of the self-check AD.

A ground wire zero wire abnormality detection system, including:

Memory, used to store computer programs;

The processor is configured to execute the computer program to realize the steps of any one of the above-mentioned methods for detecting an abnormality of the ground wire and zero wire.

A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the steps of any of the above-mentioned methods for detecting an abnormality of the ground and zero line are realized.

In summary, the ground zero wire abnormality detection device provided by the embodiment of the present invention detects the power socket through the ground zero wire abnormality detection method combined with the inductive antenna; the method is perfect, and it realizes whether the power socket is in the live wire or not. The detection of missing zero wire, ground wire, or the state of the neutral wire and the ground wire being reversed, is also applicable to the national standard 220V/50HZ system, and the 110V power system of the United States/Japan; through the ground wire anomaly detection system, the grounding is automatically completed Line-zero-line abnormal detection saves time and effort; and by acquiring the initial value of self-test AD and sampling and filtering, the electric field interference in the environment is eliminated, and the measurement stability and detection accuracy of this method are improved.

In Embodiment 2, when separately detecting whether the neutral and ground wires of the tested power socket are connected reversely, it is also necessary to make sure that the tested power socket is connected with a live wire, and the live wire is connected at the correct position:

Step 201: Acquire circuit state information, where the circuit state information is the current information of the detection circuit used in the power polarity detector to communicate with the power socket under test;

Step 202: Determine whether the circuit state information is greater than a preset current, and the preset current represents the amount of current in the open-circuit state of the detection circuit;

Step 203: If yes, output third control information. The third control information is used to drive the detection circuit to disconnect from the live, neutral, and ground terminals of the tested power socket, and receive data from the inductive antenna. The first live terminal voltage is the induced voltage measured when the inductive antenna is close to the live terminal of the tested power socket;

Step 204: Determine whether the voltage of the first live wire terminal is greater than a preset voltage, and the preset voltage is 90V.

Furthermore, step 201 to step 204 realize the determination of whether the tested power socket is connected with a live wire, and the live wire is connected at the correct position.

Further, it is determined whether the neutral wire and the ground wire of the tested power socket are connected reversely;

Step 205: If yes, output fourth control information, which is used to restore the connection with the live terminal and the ground terminal of the tested power socket;

Step 206: Receive a first comparison voltage obtained from an inductive antenna. The first comparison voltage is measured by the inductive antenna when only the live terminal and the ground terminal of the tested power socket are connected through the detection circuit. The induced voltage;

Step 207: Output fifth control information. The fifth control information is used to drive the detection circuit to restore the connection with the neutral end of the power socket under test and to drive the detection circuit to disconnect from the ground of the power socket under test. Wire end connection;

Step 208: Receive a second comparison voltage obtained from an inductive antenna. The second comparison voltage is measured by the inductive antenna when only the live terminal and the neutral terminal of the tested power socket are connected through the detection circuit. The induced voltage;

Step 209: Determine whether the second comparison voltage is greater than the first comparison voltage;

Step 210: If yes, generate second alarm information, which is used to indicate that the neutral wire and the ground wire of the power socket under test are connected reversely.

Compared with Embodiment 1, this embodiment can separately perform the detection of whether the ground wire and the neutral wire of the tested power socket are connected reversely. It should be noted that steps 203 to 210 are also applicable to step 202, determining whether the circuit state information is greater than the preset current, and the subsequent steps when the circuit state information is greater than the preset current.

Embodiment 3 provides a socket detection device applying the electric neutral wire abnormality detection system, including: the above-mentioned electric wire neutral abnormality detection system, a test plug provided with a live wire connection end, a neutral wire connection end, and a ground wire connection end, and A detection circuit connected to the test plug; an induction antenna is provided corresponding to the live end of the power socket under test, and the induction antenna is connected with the first signal input end of the wire neutral abnormality detection system.

Further, the detection circuit includes a live wire sub-circuit, a zero wire sub-circuit, and a ground wire sub-circuit which are respectively connected to the live wire connection end, the neutral wire connection end, and the ground wire connection end, and the live wire The sub-circuit, the zero line sub-circuit, and the ground line sub-circuit are connected in sequence to form a loop.

Further, the fire-wire sub-circuit includes a first light-emitting diode, a first protection resistor, and a first rectifier diode connected in series in sequence, the anode of the first light-emitting diode is connected to the fire-wire connection end, and the first rectifier diode The negative pole of the second rectifier diode is connected to the ground line sub-circuit; the zero line sub-circuit includes a second rectifier diode, a second light emitting diode, and a second protection resistor connected in series in sequence. The anode of the second rectifier diode is connected to the zero The input terminal of the first light-emitting diode is also connected to the output terminal of the second protection resistor; the ground line sub-circuit includes a third light-emitting diode, a third protection resistor, and a third light-emitting diode connected in series in sequence. A rectifier diode, the cathode of the third rectifier diode is connected to the ground connection end, and the anode of the second rectifier diode is also connected to the anode of the third light emitting diode.

Further, the inductive antenna is connected to the first signal input terminal of the electric wire zero line abnormality detection system through a fourth protection resistor; and a grounded signal attenuation resistor is also connected to the input terminal of the fourth protection resistor.

Further, the first signal output terminal of the electric wire neutral wire abnormality detection system is connected with a neutral ground wire open indicator; the second signal output terminal of the electric wire neutral wire abnormality detection system is connected with a neutral wire ground wire reverse indicator light.

Further, it also includes a Hall sensor corresponding to the detection circuit, and the Hall sensor is connected to the second signal input end of the wire zero line abnormality detection system; and the inductive antenna is also connected to an analog-to-digital converter , The analog-to-digital converter is connected to the first signal input end of the electric wire zero line abnormality detection system.

Further, the socket detection device supporting the detection of the abnormality of the ground wire and the neutral wire further includes an insulating housing, and the insulating housing is provided with an independent first circuit accommodating cavity, a second circuit accommodating cavity, and a third circuit accommodating cavity. , The live wire sub-circuit, the zero wire test sub-circuit, and the ground wire sub-circuit are respectively arranged in the first circuit accommodating cavity, the second circuit accommodating cavity, and the third circuit accommodating cavity and the live wire Connection of the connection end, the neutral wire connection end, and the ground wire connection end;

And a first antenna guide groove for the sensing antenna to slide is provided in the first circuit accommodating cavity, the second circuit accommodating cavity, and the third circuit accommodating cavity; the live wire connection end of the test plug A second antenna guide groove for the inductive antenna to slide is provided therein;

Corresponding to the first circuit accommodating cavity, the second circuit accommodating cavity, and the third circuit accommodating cavity are provided with a knob corresponding to the second antenna guide groove and the three first antenna guide grooves At least four gears, the sensing antenna and the knob are connected by a telescopic mechanism;

The knob is driven to rotate by a steering drive device, the telescopic mechanism is driven by a telescopic drive mechanism to make a telescopic movement, and the steering drive device and the telescopic drive mechanism are respectively connected to the third signal output terminal and the first signal output terminal of the micro-control unit. Four signal output terminals.

Specifically in this embodiment, the telescopic mechanism is a common piston rod, the telescopic drive mechanism is a telescopic cylinder, and the steering drive device is a steering cylinder.

Furthermore, according to the control signal sent by the micro-control unit, the induction antenna can be driven to move to the first antenna guide groove or the second antenna guide groove through the cooperation of the knob and the telescopic mechanism, so as to enable the subsequent detection of the abnormality of the ground wire and the neutral wire. The method is implemented.

In addition, the present invention also provides a simple and easy-to-see Embodiment 4. When the power polarity detector is powered on, the initial value of the self-check AD is obtained through the analog-to-digital converter in the power polarity detector, according to the preset threshold= Self-check AD initial value + paid initial value (90V), and calculate the preset threshold;

Insert the test plug of the power polarity detector into the tested power socket, obtain the circuit state information through the Hall sensor, and determine whether the circuit state information is greater than the preset current; when the circuit state information is less than or equal to the preset current, determine the power source The detection circuit of the polarity detector is not live, that is, the tested power socket does not form a loop through the power polarity detector. At this time, the tested power socket may lack live wire, or the tested power socket lacks neutral wire or ground wire. ；

Push the induction antenna to the live wire connection end of the test plug of the power socket detection device (power polarity detector) through the adjustment mechanism such as paddles, turntables, and knobs, combined with expansion mechanisms such as push blocks and telescopic blocks, and receive Correspond to the voltage information of the live terminal of the tested power socket; and then determine whether the voltage information is greater than the preset threshold calculated above;

When the voltage information is greater than the preset threshold calculated above, a first alarm signal is generated and displayed or sent by the power polarity detector to show the user that the neutral and ground wires of the tested power socket are open. information;

When determining whether the circuit state information is greater than the preset current, if the circuit state information is greater than the preset current, output third control information to control the first switch, the second switch, and the third switch to turn off, Making the detection circuit disconnect from the live wire end, the neutral wire end, and the ground wire end of the tested power socket;

Then push the induction antenna to the live wire connection end of the test plug of the power socket detection device (power polarity detector) through the adjustment mechanism such as the paddle, the turntable, the knob, and the expansion mechanism such as the push block and the telescopic block. Receive the first live wire terminal voltage; further determine whether the first live wire terminal voltage is greater than a preset voltage (90V), so as to realize whether the tested power socket is connected with a live wire and the live wire is connected at the correct position;

When the voltage of the first live wire terminal is greater than the preset voltage, it is implemented to determine whether the neutral wire and the ground wire of the tested power socket are connected reversely: the fourth control information is output, and the first switch and the third switch are controlled. The switch is closed, so that the detection circuit restores the connection with the live wire end and the ground wire end of the power socket; then, the induction antenna is pushed to the position of Close to the firing line sub-circuit, the induction antenna collects voltage information through the electric field of the firing line sub-circuit at this time as the first comparison voltage; furthermore, it receives the first comparison voltage obtained from the induction antenna and temporarily stores it;

Further, output fifth control information to control the second switch to close and the third switch to open, so that the detection circuit restores the connection with the neutral end of the power socket and disconnects the detection circuit from the tested power supply Connect the ground terminal of the socket; then through the adjustment mechanism of the paddle, turntable, knob, etc., combined with the expansion mechanism of the push block, the expansion block, etc., push the induction antenna close to the zero measurement line sub-circuit, and the induction antenna will pass the zero measurement at this time The voltage information collected by the electric field of the line circuit is used as the second comparison voltage; in addition, the second comparison voltage obtained from the induction antenna is received and temporarily stored;

It is determined whether the second comparison voltage is greater than the first comparison voltage, and when the second comparison voltage is greater than the first comparison voltage, a second alarm signal is generated, and the power polarity detector is used Display or send to show users the information that the neutral and ground wires of the power socket under test are connected reversely.

Wherein, when receiving voltage information corresponding to the live terminal of the power socket under test, a filtering process is also required: the induction antenna collects ten consecutive instantaneous voltages at the live terminal of the tested power socket, and the instantaneous voltage is regarded as a sine cycle Information; After removing the maximum and minimum values of ten consecutive sinusoidal period information, the average value of the remaining 8 sinusoidal period information is calculated, the average value is used as the voltage information, and then whether the voltage information described above is greater than The judgment of the preset threshold calculated above realizes the filtering effect; at the same time, this filtering process is also applicable to the collection of the first comparison voltage and the second comparison voltage.

Those skilled in the art can understand that it is possible to adaptively change the modules in the device in the embodiment and set them in one or more devices different from the embodiment. The modules or units or components in the embodiments can be combined into one module or unit or component, and in addition, they can be divided into multiple sub-modules or sub-units or sub-components. Except that at least some of such features and/or processes or units are mutually exclusive, any combination can be used to compare all features disclosed in this specification (including the accompanying claims, abstract and drawings) and any method or methods disclosed in this manner or All the processes or units of the equipment are combined. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

The various component embodiments of the present invention may be implemented by hardware, or by software modules running on one or more processors, or by a combination of them. Those skilled in the art should understand that a microprocessor or a digital information processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components in the embodiments of the present invention. The present invention can also be implemented as a device or device program (for example, a computer program and a computer program product) for executing part or all of the methods described herein. Such a program for realizing the present invention may be stored on a computer-readable medium, or may be in the form of one or more pieces of information. Such information can be downloaded from Internet websites, or provided on carrier information, or provided in any other form.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Anyone familiar with the art, without departing from the scope of the technical solution of the present invention, can use the technical means and technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or the modifications are equivalent changes, etc. Efficacies. Therefore, any content that does not deviate from the technical solution of the present invention, and equivalent changes made according to the shape, structure and principle of the present invention, shall be covered by the protection scope of the present invention.

Industrial applicability

The design of the invention is reasonable and ingenious, and the provided ground wire neutral wire abnormality detection device detects the power socket through the ground wire neutral wire abnormal detection method combined with the induction antenna; the method is perfect, and it realizes whether the power socket is in the live wire but lacks the neutral wire. , Ground wire, or the detection of the reverse state of the neutral wire and the ground wire, which is also applicable to the national standard 220V/50HZ standard, and the 110V power system of the United States/Japan; through the ground wire anomaly detection system, the ground wire is automatically completed Anomaly detection saves time and effort; and by acquiring the initial value of self-checking AD and sampling and filtering, the electric field interference in the environment is eliminated, and the measurement stability and detection accuracy of this method are improved.

Claims (10)

A method for detecting an abnormality of a ground wire and a neutral wire is applied to a power supply polarity detector, the power supply polarity detector having an inductive antenna, wherein the method includes: Acquiring circuit state information, where the circuit state information is the current information of the detection circuit used in the power polarity detector to communicate with the tested power socket; Judging whether the circuit state information is greater than a preset current, and the preset current represents the amount of current in the open-circuit state of the detection circuit; If not, receive the voltage information corresponding to the live terminal of the tested power socket obtained from the inductive antenna; Judging whether the voltage information is greater than a preset threshold; If yes, first alarm information is generated, which is used to characterize the open circuit of the neutral wire and the ground wire of the power socket under test. The method for detecting an abnormality of a ground wire and a neutral wire according to claim 1, wherein when determining whether the circuit state information is greater than a preset current, the method further comprises: If yes, output first control information, where the first control information is used to drive the detection circuit to disconnect from the neutral end of the tested power socket; Receive a first comparison voltage obtained from an induction antenna, where the first comparison voltage is the induction measured by the induction antenna when only the live terminal and the ground terminal of the tested power socket are connected through the detection circuit Voltage; Output second control information, the second control information is used to drive the detection circuit to restore the connection with the neutral terminal of the power socket under test and drive the detection circuit to disconnect the connection with the ground terminal of the power socket under test ； Receive the second comparison voltage obtained from the induction antenna, the second comparison voltage is the induction measured by the induction antenna when only the live end and the neutral end of the tested power socket are connected through the detection circuit Voltage; Determining whether the second comparison voltage is greater than the first comparison voltage; If so, then generate second alarm information to indicate that the neutral and ground wires of the tested power socket are reversed. The method for detecting an abnormality of the neutral wire of the ground wire according to claim 1, wherein when receiving the voltage information corresponding to the live wire end of the power socket under test obtained from the inductive antenna, the method further comprises: Receiving a number of continuous sine period information obtained from an inductive antenna, where the sine period information is the instantaneous voltage at the live terminal of the power socket under test; The voltage information is acquired according to the sine period information, where the voltage information is an average value of several sine period information. The method for detecting an abnormality of a ground wire and a neutral wire according to claim 1, wherein, before determining whether the voltage information is greater than a preset threshold, the method further comprises: Acquiring an initial self-check AD value, where the initial self-check AD value is the AD value when the power polarity detector is not connected to the checked power source, and the AD value is a sampling value of an analog-to-digital converter; The preset threshold is generated according to the initial value of the self-check AD. A device for detecting an abnormality of a ground wire and a neutral wire is applied to a power supply polarity detector, the power supply polarity detector having an inductive antenna, which includes: A circuit state information acquisition module, configured to acquire circuit state information, where the circuit state information is the current information of the detection circuit used in the power polarity detector to communicate with the tested power socket; The first condition judgment module is configured to judge whether the circuit state information is greater than a preset current, and the preset current represents the amount of current in the open-circuit state of the detection circuit; A voltage information acquisition module for receiving voltage information corresponding to the live terminal of the power socket under test acquired from the inductive antenna; The second condition judgment module is used to judge whether the voltage information is greater than a preset threshold; The first information generating module generates the first alarm information, which is used to characterize the open circuit of the neutral wire and the ground wire of the power socket under test. The device for detecting an abnormality of a ground wire and a neutral wire according to claim 5, further comprising: The first information output module is configured to output first control information, and the first control information is used to drive the detection circuit to disconnect the neutral end of the tested power socket; The first comparison information acquisition module is configured to receive the first comparison voltage obtained from the induction antenna, and the first comparison voltage is when only the live terminal and the ground terminal of the tested power socket are connected through the detection circuit , The induced voltage measured by the inductive antenna; The second information output module is used to output second control information. The second control information is used to drive the detection circuit to restore the connection with the neutral end of the tested power socket and drive the detection circuit to disconnect from the Connection of the ground terminal of the tested power socket; The second comparison information acquisition module is configured to receive the second comparison voltage obtained from the induction antenna, and the second comparison voltage is only when the tested power socket live terminal and the neutral terminal are connected through the detection circuit , The induced voltage measured by the inductive antenna; The third condition judgment module is used to judge whether the second comparison voltage is greater than the first comparison voltage; The second information generating module is used to generate second alarm information, which is used to characterize the reverse connection of the neutral wire and the ground wire of the power socket under test. 5. The ground zero line abnormality detection device according to claim 5, wherein the voltage information acquisition module further comprises: The information acquisition sub-module is used to receive several continuous sine cycle information acquired from the induction antenna, where the sine cycle information is the instantaneous voltage at the live terminal of the tested power socket; The information calculation sub-module is configured to obtain the voltage information according to the sine period information, and the voltage information is an average value of a number of the sine period information. The device for detecting an abnormality of a ground wire and a neutral wire according to claim 5, further comprising: The AD value acquisition module is used to acquire the initial value of the self-check AD, the initial value of the self-check AD is the AD value when the power polarity detector is not connected to the power source to be checked, and the AD value is the value of the analog-to-digital converter sample value; The condition generating module is configured to generate the preset threshold according to the initial value of the self-check AD. An abnormal detection system for the ground wire and zero wire, which includes: Memory, used to store computer programs; The processor is configured to execute the computer program to implement the steps of the method for detecting an abnormality of the ground wire and neutral wire according to any one of claims 1-4. A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the detection of an abnormality of the ground wire and the neutral wire according to any one of claims 1 to 4 is realized Method steps.

Images