A meter wiring testing device and a meter wiring testing method

Abstract

This application relates to a meter wiring detection device and a meter wiring detection method. The device includes a data acquisition unit, a signal processing unit, and a control unit. The data acquisition unit is used to acquire electric field signal data and magnetic field signal data of the wires connected to the meter. The signal processing unit is used to process the electric field signal data and magnetic field signal data to obtain level signal data and current signal data. The control unit is used to identify the cable type and wiring sequence of the corresponding wires based on the level signal data and to determine whether the wiring is secure based on the current signal data, thus obtaining the detection result. This device automatically identifies the cable type and wiring sequence of the wires connected to the meter and determines whether there are faults such as loose connections or poor contact in the wire wiring, avoiding human error.

Description

Technical Field

[0001] This application relates to the field of electricity meter wiring identification technology, and in particular to an electricity meter wiring detection device and an electricity meter wiring detection method. Background Technology

[0002] With the increasing popularity of various power generation methods such as solar and wind power in civilian use, the demand for electricity meter installation is growing. However, issues such as the correctness of the input and output wiring sequence and the presence of loose connections arise during meter installation. Incorrect wiring sequence can easily lead to electric shock or short circuits, while loose connections can cause fires or unstable power transmission.

[0003] Currently, common wiring testing devices are divided into two categories: contact and non-contact. Contact wiring testing requires direct contact with the inner charged metal layer of the wire, which carries a certain risk of electric shock and is also prone to poor contact due to oxidation of the wire surface, leading to testing errors. Non-contact wiring testing eliminates the risk of electric shock. However, both types of wiring testing technologies can only distinguish between the live and neutral wires; whether the wiring sequence is correct still requires on-site personnel to judge, which is prone to misjudgment. In addition, existing wiring testing technologies only distinguish between the live and neutral wires; there is no method to test or judge whether the wires are making a secure connection. Summary of the Invention

[0004] This application provides a meter wiring detection device and a meter wiring detection method to solve the technical problem that existing meter wiring detection methods cannot identify the wiring sequence and whether the wiring is secure.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] On the one hand, a meter wiring testing device is provided, comprising:

[0007] The acquisition unit is used to acquire electric field signal data and magnetic field signal data of each wire connected to the meter in a non-contact manner;

[0008] A signal processing unit is connected to the acquisition unit. The signal processing unit is used to process the electric field signal data and the magnetic field signal data to obtain corresponding level signal data and current signal data.

[0009] The control unit is connected to the signal processing unit. The control unit is used to identify the cable type and wiring sequence of the corresponding wire based on the level signal data, and to determine whether the wiring of the corresponding wire is secure based on the current signal data, so as to obtain the detection result.

[0010] Preferably, the acquisition unit includes an electric field probe and a magnetic field probe, and the corresponding signal processing unit includes an electric field signal processing subunit connected to the electric field probe and a magnetic field signal processing subunit connected to the magnetic field probe.

[0011] Preferably, the electric field signal processing subunit includes a sixth switch, an eighth switch, and a ninth switch. The first end of the sixth switch is connected to the electric field probe, the third end of the sixth switch is connected to the first end of the eighth switch, the third end of the eighth switch is connected to the first end of the ninth switch, the third end of the ninth switch is grounded, and the second ends of the sixth, eighth, and ninth switches are all connected to a power supply connection terminal. An electric field output terminal is provided between the power supply connection terminal and the second end of the ninth switch, and the electric field output terminal is connected to the control unit.

[0012] Preferably, the magnetic field signal processing subunit includes a differential amplifier element and an output resistor. The input terminal of the differential amplifier element is connected to the magnetic field probe, and the output terminal of the differential amplifier element is connected to the control unit through the output resistor. The differential amplifier element is used to convert the magnetic field signal data into AC current signal data with a frequency of 50Hz.

[0013] Preferably, the differential amplifier element is an operational amplifier.

[0014] Preferably, the control unit includes a first identification subunit and a second identification subunit;

[0015] The first identification subunit is used to determine whether the cable type of the corresponding wire is a live wire or a neutral wire based on whether the level signal data is a high or low level signal; and to determine whether the wiring sequence of the meter is correct by comparing the cable type of all the wires in the meter with the preset wiring sequence.

[0016] The second identification subunit is used to calculate the current data for each current cycle based on the current signal data, and to determine whether the corresponding wire connection is secure based on whether all the current data are not 0.

[0017] Preferably, the control unit includes a single-chip microcomputer or a microcontroller unit.

[0018] Preferably, the meter wiring detection device includes an output unit connected to the control unit, the output unit being used to issue an alarm based on the detection result and to display the detection result; the output unit includes a display screen and an audible and visual alarm element connected to the control unit.

[0019] On another front, a method for testing the wiring of an electricity meter is provided, which is applied to the aforementioned electricity meter wiring testing device. This method includes the following steps:

[0020] The electric field and magnetic field signal data of each wire connected to the meter are collected in a non-contact manner.

[0021] The electric field signal data and the magnetic field signal data are processed to obtain the corresponding level signal data and current signal data;

[0022] The detection results are obtained by identifying the cable type and wiring sequence of the corresponding wire based on the level signal data, and determining whether the wiring of the corresponding wire is secure based on the current signal data.

[0023] Preferably, the detection results include identifying the cable type and wiring sequence of the corresponding wire based on the level signal data, and determining whether the wiring of the corresponding wire is secure based on the current signal data, to obtain the detection results as follows:

[0024] Based on whether the level signal data is a high or low level signal, determine whether the corresponding wire is a live wire or a neutral wire; and by comparing the wire types of all the wires in the meter with the preset wiring sequence, determine whether the meter wiring sequence is correct.

[0025] The current data for each current cycle is calculated based on the current signal data, and the connection of the corresponding wire is determined based on whether all the current data are not zero.

[0026] The meter wiring detection device and method are disclosed. The meter wiring detection device includes a data acquisition unit, a signal processing unit connected to the data acquisition unit, and a control unit connected to the signal processing unit. The data acquisition unit is used to acquire electric field signal data and magnetic field signal data of each wire connected to the meter in a non-contact manner. The signal processing unit is used to process the electric field signal data and magnetic field signal data to obtain corresponding level signal data and current signal data. The control unit is used to identify the cable type and wiring sequence of the corresponding wire based on the level signal data and to determine whether the wiring of the corresponding wire is secure based on the current signal data, thereby obtaining the detection result.

[0027] As can be seen from the above technical solution, this application has the following advantages: The meter wiring detection device collects electric field signal data and magnetic field signal data of each wire connected to the meter through the acquisition unit. After processing the collected data, it transmits it to the control unit for analysis and identification of the wire and cable type, wiring sequence, and whether the connection with the meter is secure. It realizes automatic identification of the cable type and wiring sequence of the wires connected to the meter, and judges whether the wiring sequence is correct based on the identified wire sequence, avoiding the occurrence of human misjudgment. Based on judging whether the wires connected to the meter are secure, it judges whether there are faults such as loose connection or poor contact in the wire wiring, which solves the technical problem that the existing meter wiring detection method cannot identify the wiring sequence and whether the wiring is secure.

[0028] This meter wiring detection method identifies the corresponding level signal data and current signal data after collecting the electric field and magnetic field magnitude changes of each wire connected to the meter. It identifies whether each wire is a neutral wire or a live wire, and whether the internal current of each wire is stable. In this way, it determines whether the wiring sequence between the wire and the meter is correct, and whether there are any loose connections in the wires. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the frame of the meter wiring detection device described in the embodiments of this application;

[0031] Figure 2 This is a circuit diagram of the electric field signal processing subunit in the meter wiring detection device described in the embodiments of this application;

[0032] Figure 3 This is a circuit diagram of the magnetic field signal processing subunit in the meter wiring detection device described in the embodiments of this application;

[0033] Figure 4 This is a circuit diagram of the control unit in the meter wiring detection device described in the embodiments of this application;

[0034] Figure 5 This is a circuit diagram of the output unit in the meter wiring detection device described in the embodiments of this application;

[0035] Figure 6 This is a flowchart illustrating the steps of the meter wiring detection method described in the embodiments of this application. Detailed Implementation

[0036] To make the inventive objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0038] In the embodiments of this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0039] This application provides a meter wiring detection device and a meter wiring detection method, which solves the technical problem that existing meter wiring detection methods cannot identify the wiring sequence and whether the wiring is secure.

[0040] Example 1:

[0041] Figure 1 This is a schematic diagram of the frame of the meter wiring detection device described in the embodiments of this application.

[0042] like Figure 1 As shown in the figure, this application provides a meter wiring detection device, including a data acquisition unit 10, a signal processing unit 20 connected to the data acquisition unit 10, and a control unit 30 connected to the signal processing unit.

[0043] In this embodiment of the application, the acquisition unit 10 is used to acquire electric field signal data and magnetic field signal data of each wire connected to the meter in a non-contact manner.

[0044] It should be noted that the meter wiring detection device collects electric field signal data and magnetic field signal data of each wire connected to the meter through the acquisition unit 10.

[0045] In this embodiment, the signal processing unit 20 is used to process electric field signal data and magnetic field signal data to obtain corresponding level signal data and current signal data.

[0046] It should be noted that the meter wiring detection device processes the electric field signal data and magnetic field signal data collected by the acquisition unit 10 through the signal processing unit 20 to obtain data that can be acquired by the control unit 30.

[0047] In this embodiment, the control unit 30 is used to identify the cable type and wiring sequence of the corresponding wire based on the level signal data, and to determine whether the wiring of the corresponding wire is secure based on the current signal data, thereby obtaining the detection result.

[0048] It should be noted that the meter wiring detection device analyzes the data transmitted by the signal processing unit 20 through the control unit 30 to identify the type and sequence of the wires and cables, as well as whether the connection to the meter is secure. In this embodiment, the meter wiring detection device can automatically identify the type and sequence of the wires connected to the meter, and determine whether the wiring sequence is correct based on the identified sequence, avoiding human error. Furthermore, the meter wiring detection device can determine whether the wires connected to the meter are secure, thereby identifying faults such as loose connections or poor contact.

[0049] This application provides a meter wiring detection device, including a data acquisition unit, a signal processing unit connected to the data acquisition unit, and a control unit connected to the signal processing unit. The data acquisition unit is used to acquire electric field signal data and magnetic field signal data of each wire connected to the meter in a non-contact manner. The signal processing unit is used to process the electric field signal data and magnetic field signal data to obtain corresponding level signal data and current signal data. The control unit is used to identify the cable type and wiring sequence of the corresponding wire based on the level signal data and to determine whether the wiring of the corresponding wire is secure based on the current signal data, thereby obtaining the detection result. This electricity meter wiring detection device collects electric and magnetic field signal data from each wire connected to the electricity meter via a data acquisition unit. The collected data is then processed and transmitted to a control unit for analysis and identification of the wire / cable type, wiring sequence, and the tightness of the connection to the meter. This allows for automatic identification of the cable type and wiring sequence, determining the correctness of the wiring sequence to avoid human error. Furthermore, by assessing the tightness of the connection, it can detect faults such as loose connections or poor contact, thus solving the technical problem of existing electricity meter wiring detection methods being unable to identify the wiring sequence and the tightness of the connection.

[0050] like Figure 1 As shown, in one embodiment of this application, the acquisition unit 10 includes an electric field probe 11 and a magnetic field probe 12, and the corresponding signal processing unit 20 includes an electric field signal processing subunit 21 connected to the electric field probe 11 and a magnetic field signal processing subunit 22 connected to the magnetic field probe 12.

[0051] It should be noted that, in order to collect the electric field signal generated in space by the wire connected to the meter and the magnetic field signal generated in space by the changing magnetic field in the internal cable of the wire due to the current, the acquisition unit 10 is equipped with a non-contact electric field probe 11 and a magnetic field probe 12 to collect the electric field signal data and magnetic field signal data generated in space by the corresponding wire, respectively. Then, the collected electric field signal data is transmitted to the electric field signal processing subunit 21 for processing, and the magnetic field signal data is transmitted to the magnetic field signal processing subunit 22 for processing. After the data is processed by the signal processing unit 20, it is transmitted to the control unit 30.

[0052] Figure 2 This is a circuit diagram of the electric field signal processing subunit in the meter wiring detection device described in this application embodiment.

[0053] In one embodiment of this application, the electric field signal processing subunit 21 includes a sixth switch Q6, an eighth switch Q8, and a ninth switch Q9. The first end of the sixth switch Q6 is connected to the electric field probe 11, the third end of the sixth switch Q6 is connected to the first end of the eighth switch Q8, the third end of the eighth switch Q8 is connected to the first end of the ninth switch Q9, the third end of the ninth switch Q9 is grounded, and the second ends of the sixth switch Q6, the eighth switch Q8, and the ninth switch Q9 are all connected to the power supply connection terminal VCC_3.3V. An electric field output terminal OUTPUT is provided between the power supply connection terminal VCC_3.3V and the second end of the ninth switch Q9, and the electric field output terminal OUTPUT is connected to the control unit 30.

[0054] It should be noted that the power supply connection terminal VCC_3.3V is used to connect to a 3.3V DC power supply to provide power to the electric field signal processing unit 21. The sixth switch Q6, the eighth switch Q8, and the ninth switch Q9 can all be transistors, with the base of the transistor serving as the first terminal, the collector as the second terminal, and the emitter as the third terminal. In this embodiment, a thirty-first resistor R31 is connected in series between the power supply connection terminal VCC_3.3V and the electric field output terminal OUTPUT. The working principle of the electric field signal processing subunit 21 is as follows: the electric field signal data collected by the electric field probe 11 enters the electric field signal processing subunit 21 through the INPUT wire. The weak alternating electric field signal drives the sixth switch Q6 to intermittently turn on and off. The frequency of the alternating electric field signal is the mains power frequency of 50Hz. As the sixth switch Q6 turns on, the eighth switch Q8 and the ninth switch Q9 also turn on in turn and amplify the current, finally pulling the output signal of the electric field output terminal OUTPUT low. In a continuous period of time, the electric field signal processing subunit 21 outputs alternating high and low level signal data through the output of the electric field output terminal OUTPUT. The frequency of the level signal data is 50Hz. In other embodiments, the sixth switch Q6, the eighth switch Q8, and the ninth switch Q9 can also be selected as other field-effect transistors such as MOS transistors and IGBT transistors with the same function.

[0055] Figure 3 This is a circuit diagram of the magnetic field signal processing subunit in the meter wiring detection device described in this application embodiment.

[0056] like Figure 3 As shown, in one embodiment of this application, the magnetic field signal processing subunit 22 includes a differential amplifier element U6A and an output resistor R34. The input terminal of the differential amplifier element U6A is connected to the magnetic field probe 12, and the output terminal of the differential amplifier element U6A is connected to the control unit 30 through the output resistor R34. The differential amplifier element U6A is used to convert the magnetic field signal data into AC current signal data with a frequency of 50Hz.

[0057] It should be noted that the differential amplifier U6A can be selected as an operational amplifier of model LM2904DR2G. In this embodiment, the working principle of the magnetic field signal processing subunit 22 is as follows: the magnetic field signal collected by the magnetic field probe 12 is input to the magnetic field signal processing subunit 22 through the connection terminal JP1 as magnetic field signal data. The magnetic field signal contains weak alternating signals Ia+ and Ia-. These weak alternating signals Ia+ and Ia- are amplified by the differential amplifier U6A and output as the Ia signal through the output voltage R34. Over a continuous period, the Ia signal changes with the alternating current of the wire and is converted by the magnetic field signal processing subunit 22 into an alternating current signal with a frequency of 50Hz as current signal data.

[0058] Figure 4 This is a circuit diagram of the control unit in the meter wiring detection device described in the embodiments of this application.

[0059] like Figure 4 As shown, in one embodiment of this application, the control unit 30 includes a single-chip microcomputer or a microcontroller, and the control unit 30 includes a first identification subunit and a second identification subunit;

[0060] The first identification subunit is used to determine whether the corresponding wire is a live wire or a neutral wire based on whether the level signal data is a high or low level signal; and to determine whether the wiring sequence of the meter is correct by comparing the wire types of all the wires in the meter with the preset wiring sequence.

[0061] The second identification subunit is used to calculate the current data for each current cycle based on the current signal data, and to determine whether the corresponding wire connection is secure based on whether all current data are not zero.

[0062] It should be noted that the microcontroller or microcontroller unit can be selected as an STM32F103VCT6 MCU control chip. The MCU control chip uses eight pins (PA0-PA7) with ADC functions to acquire level signal data and current signal data. In this embodiment, if the level signal data is a high or low level signal, the corresponding wire type is determined to be a live wire; if the level signal data is a signal without high or low level changes, the corresponding wire type is determined to be a neutral wire. Each connection terminal on the meter is pre-set, for example: Figure 1 As shown, the preset wiring sequence of the meter's terminals from left to right is live wire, neutral wire, live wire, and neutral wire. If the cable type of the wire connected to the meter's terminals matches the corresponding terminal in the preset sequence, the meter's wiring sequence is correct; if the cable type does not match the corresponding terminal in the preset sequence, the meter's wiring sequence is incorrect. The second identification subunit calculates the current data for each cycle of the AC current signal data by integrating it. Then, it determines whether the current data is zero in all cycles. If the current data is not zero, the current fluctuation is small, indicating good contact or secure wiring between the wire and the meter's terminals. If at least one current data point is zero in all cycles, the current fluctuation is large, indicating poor contact or loose wiring between the wire and the meter's terminals. The current data refers to the product of all AC current signals from 0 to the time range T and time t.

[0063] Figure 5 This is a circuit diagram of the output unit in the meter wiring detection device described in this application embodiment.

[0064] like Figure 4 and Figure 5 As shown in one embodiment of this application, the meter wiring detection device includes an output unit 40 connected to the control unit 30. The output unit 40 is used to generate an alarm based on the detection result and to display the detection result. The output unit 40 includes a display LED and an audible and visual alarm element connected to the control unit 30.

[0065] It should be noted that the audible and visual alarm element can be a buzzer U14. In this embodiment, the MCU control chip uses pins PD0~PD15, PE0~PE15, etc., as driving pins for the LCD display, and uses PC15 as the control pin for the audible and visual alarm element. This meter wiring detection device displays and alarms the detection results through the LCD display and the buzzer.

[0066] In the embodiments of this application, the electricity meter wiring detection device, through the control unit 30, identifies the corresponding level signal data and current signal data after collecting the electric field and magnetic field magnitude change signals of each wire connected to the electricity meter. It identifies whether each wire is a neutral wire or a live wire, and whether the internal current of each wire is stable, thereby determining whether the wiring sequence between the wires and the electricity meter is correct, and whether there are any loose connections. Based on the detection results, the control unit 30 drives the display screen and the audible and visual alarm, allowing the user to intuitively know whether the electricity meter is installed correctly.

[0067] Example 2:

[0068] Figure 6 This is a flowchart illustrating the steps of the meter wiring detection method described in the embodiments of this application.

[0069] like Figure 6 As shown, this application provides a method for testing the wiring of an electricity meter, which is applied to the above-mentioned electricity meter wiring testing device. The method for testing the wiring of an electricity meter includes the following steps;

[0070] S1. Non-contact method is used to collect electric field signal data and magnetic field signal data of each wire connected to the meter;

[0071] S2. Process the electric field signal data and magnetic field signal data to obtain the corresponding level signal data and current signal data;

[0072] S3. Identify the cable type and wiring sequence of the corresponding wire based on the level signal data, and determine whether the wiring of the corresponding wire is secure based on the current signal data, to obtain the test results;

[0073] The detection process involves identifying the cable type and wiring sequence of the corresponding wire based on the level signal data, and determining the tightness of the wiring based on the current signal data. The resulting test results include:

[0074] Based on whether the level signal data is a high or low level signal, determine whether the corresponding wire is a live wire or a neutral wire; and by comparing the wire types of all the wires in the meter with the preset wiring sequence, determine whether the meter wiring sequence is correct.

[0075] Calculate the current data for each current cycle based on the current signal data, and determine whether the corresponding wire connection is secure based on whether all current data are non-zero.

[0076] It should be noted that the details of the meter wiring detection device have already been described in Embodiment 1, and will not be repeated in this embodiment. In this embodiment, as... Figure 1 As shown, the preset wiring sequence of the meter's terminals from left to right is live wire, neutral wire, live wire, and neutral wire. If the cable type of the wire connected to the meter's terminals matches the corresponding terminal in the preset sequence, the meter's wiring sequence is correct; if the cable type does not match the corresponding terminal in the preset sequence, the meter's wiring sequence is incorrect. The second identification subunit calculates the current data for each cycle of the AC current signal data by integrating it. Then, it determines whether the current data is zero in all cycles. If the current data is not zero, the current fluctuation is small, indicating good contact or secure wiring between the wire and the meter's terminals. If at least one current data point is zero in all cycles, the current fluctuation is large, indicating poor contact or loose wiring between the wire and the meter's terminals. The current data refers to the product of all AC current signals from 0 to the time range T and time t.

[0077] This meter wiring detection method identifies the corresponding level signal data and current signal data after collecting the electric field and magnetic field magnitude changes of each wire connected to the meter. It identifies whether each wire is a neutral wire or a live wire, and whether the internal current of each wire is stable. In this way, it determines whether the wiring sequence between the wire and the meter is correct, and whether there are any loose connections in the wires.

[0078] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0079] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0080] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0081] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0082] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0083] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A meter wiring detection device, characterized in that, include: The acquisition unit is used to acquire electric field signal data and magnetic field signal data of each wire connected to the meter in a non-contact manner; A signal processing unit is connected to the acquisition unit. The signal processing unit is used to process the electric field signal data and the magnetic field signal data to obtain corresponding level signal data and current signal data. A control unit, connected to the signal processing unit, is used to identify the cable type and wiring sequence of the corresponding wire based on the level signal data, and to determine whether the wiring of the corresponding wire is secure based on the current signal data, thereby obtaining the detection result; The control unit includes a first identification subunit and a second identification subunit; The first identification subunit is used to determine whether the cable type of the corresponding wire is a live wire or a neutral wire based on whether the level signal data is a high or low level signal. And by comparing the cable types of all the wires in the meter with the preset wiring sequence, it can determine whether the meter wiring sequence is correct; The second identification subunit is used to calculate the current data for each current cycle based on the current signal data, and to determine whether the corresponding wire connection is secure based on whether all the current data are not 0. If all the current data are not 0, the corresponding wire is determined to be securely connected; if at least one of the current data is 0, the corresponding wire is determined to be loosely connected.

2. The meter wiring detection device according to claim 1, characterized in that, The acquisition unit includes an electric field probe and a magnetic field probe, and the corresponding signal processing unit includes an electric field signal processing subunit connected to the electric field probe and a magnetic field signal processing subunit connected to the magnetic field probe.

3. The meter wiring detection device according to claim 2, characterized in that, The electric field signal processing subunit includes a sixth switch, an eighth switch, and a ninth switch. The first end of the sixth switch is connected to the electric field probe, the third end of the sixth switch is connected to the first end of the eighth switch, the third end of the eighth switch is connected to the first end of the ninth switch, and the third end of the ninth switch is grounded. The second ends of the sixth, eighth, and ninth switches are all connected to a power supply connection terminal. An electric field output terminal is provided between the power supply connection terminal and the second end of the ninth switch, and the electric field output terminal is connected to the control unit.

4. The meter wiring detection device according to claim 2, characterized in that, The magnetic field signal processing subunit includes a differential amplifier element and an output resistor. The input terminal of the differential amplifier element is connected to the magnetic field probe, and the output terminal of the differential amplifier element is connected to the control unit through the output resistor. The differential amplifier element is used to convert the magnetic field signal data into AC current signal data with a frequency of 50Hz.

5. The meter wiring detection device according to claim 4, characterized in that, The differential amplifier element is an operational amplifier.

6. The meter wiring detection device according to any one of claims 1-5, characterized in that, The control unit includes a single-chip microcomputer or a microcontroller unit.

7. The meter wiring detection device according to any one of claims 1-5, characterized in that, The system includes an output unit connected to the control unit, the output unit being used to generate an alarm based on the detection result and to display the detection result; the output unit includes a display screen and an audible and visual alarm element connected to the control unit.

8. A method for testing the wiring of an electricity meter, characterized in that, Applied to the meter wiring testing device as described in any one of claims 1-7, the meter wiring testing method includes the following steps: The electric field and magnetic field signal data of each wire connected to the meter are collected in a non-contact manner. The electric field signal data and the magnetic field signal data are processed to obtain the corresponding level signal data and current signal data; The detection results are obtained by identifying the cable type and wiring sequence of the corresponding wire based on the level signal data, and determining whether the wiring of the corresponding wire is secure based on the current signal data.

9. The meter wiring detection method according to claim 8, characterized in that, The detection results include: Identifying the cable type and wiring sequence of the corresponding wire based on the voltage level signal data, and determining the tightness of the wiring of the corresponding wire based on the current signal data. Based on whether the level signal data is a high or low level signal, determine whether the corresponding wire is a live wire or a neutral wire; and by comparing the wire types of all the wires in the meter with the preset wiring sequence, determine whether the meter wiring sequence is correct. The current data for each current cycle is calculated based on the current signal data, and the connection of the corresponding wire is determined based on whether all the current data are not zero.

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