Electric equipment shell grounding reliability detection method, equipment, device and medium

Abstract

The invention discloses an electric equipment shell grounding reliability detection method, equipment, a device and a storage medium. The method comprises the following steps: measuring a first voltage between a ground port and a zero line port of electric equipment; when the first resistance value is smaller than or equal to a first preset threshold value, a first detection result is obtained; when the first resistance value is greater than the first preset threshold value, obtaining a second detection result; when the first voltage is not zero, the ground port and the zero line port are connected in series to a load resistor for discharging; after the discharging process lasts for a first preset time, measuring a second voltage between the ground port and the zero line port; and when the second voltage is not zero, reversely connecting the live wire port and the zero line port of the electric equipment, and measuring a third voltage between the ground port and the live wire port. The method can be widely applied to the technical field of equipment detection.

Description

Technical Field

[0001] The present application relates to the technical field of equipment detection, and in particular to a method, equipment, device and storage medium for detecting the reliability of grounding of a housing of an electrical device. Background Art

[0002] In order to ensure the safety of people and equipment and prevent electric shock accidents, grounding the casing of electrical equipment is an important electrical safety measure. The main function and purpose of grounding the casing of electrical equipment is to prevent electric shock accidents, ensure the safety of the power grid, enhance system reliability, protect equipment from lightning strikes, protect the environment and eliminate electromagnetic interference.

[0003] However, due to environmental corrosion interference, disordered wiring of the electrical equipment housing and other factors, the reliability of the grounding of the electrical equipment housing often decreases. In order to detect the reliability of the grounding of the electrical equipment housing, the related art often uses a multimeter to detect the electrical parameters of the terminals of the electrical equipment, and then manually judges the reliability of the grounding of the electrical equipment housing. This detection method has more manual participation, resulting in inaccurate detection results and relatively slow detection efficiency. Therefore, there are still technical problems that need to be solved in the related art. Summary of the invention

[0004] The purpose of this application is to solve one of the technical problems existing in the prior art to at least a certain extent.

[0005] To this end, an object of an embodiment of the present application is to provide a method, equipment, device and storage medium for detecting the reliability of grounding of the casing of an electrical equipment. The method, equipment and device can improve the test efficiency and improve the test accuracy.

[0006] In order to achieve the above-mentioned technical objectives, the technical solution adopted by the embodiment of the present application includes: a method for detecting the grounding reliability of the casing of an electrical equipment, comprising: measuring a first voltage between a ground port and a neutral port of the electrical equipment; when the first voltage is 0, connecting the ground port and the neutral port to a DC voltage module and measuring a first resistance value between the ground port and the neutral port; when the first resistance value is less than or equal to a first preset threshold value, obtaining a first detection result; when the first resistance value is greater than the first preset threshold value, obtaining a second detection result; when the first voltage is not 0, connecting the ground port and the neutral port in series with a load resistor for discharge; after the discharge process lasts for a first preset time, measuring a second voltage between the ground port and the neutral port; when the second voltage is 0, obtaining a second detection result; when the second voltage is When the voltage is not 0, the live port and the neutral port of the electrical device are reversely connected, and a third voltage between the ground port and the live port is measured; when the third voltage is 0, the ground port and the live port are connected to the DC voltage module and a second resistance value between the ground port and the live port is measured; when the second resistance value is less than or equal to a second preset threshold value, the first detection result is obtained; when the second resistance value is greater than the second preset threshold value, the second detection result is obtained; when the third voltage is not 0, the ground port and the live port are connected in series to the load resistor for discharge; after the discharge process lasts for a second preset time, a fourth voltage between the ground port and the live port is measured; when the fourth voltage is 0, the second detection result is obtained; when the fourth voltage is not 0, the third detection result is obtained;

[0007] Among them, the first detection result is used to indicate that the shell grounding is reliable, the second detection result is used to indicate that the shell grounding is unreliable or the shell is not grounded, and the third detection result is used to indicate that the ground wire connected to the shell is wrongly connected to other points.

[0008] In addition, the method for detecting the grounding reliability of the housing of an electrical equipment according to the above embodiment of the present invention may also have the following additional technical features:

[0009] Furthermore, in an embodiment of the present application, the first preset threshold is equal to the second preset threshold.

[0010] Further, in the embodiment of the present application, the first preset threshold is 10 ohms.

[0011] Furthermore, in an embodiment of the present application, the detection method further includes: sending the first detection result, the second detection result or the third detection result to a display unit so that the display unit displays the first detection result, the second detection result or the third detection result.

[0012] On the other hand, the embodiment of the present application further provides a device for detecting the grounding reliability of the housing of an electrical device, which is used to implement the method described above, and the device includes: a voltage measuring unit, a resistance measuring unit, a control unit, and a load unit; the load unit includes a load resistor and a DC voltage module;

[0013] a voltage measuring unit, for obtaining a first voltage between a ground port and a neutral port of an electric device, for measuring a second voltage between the ground port and the neutral port after a discharge process lasts for a first preset time, for measuring a third voltage between the ground port and the live port, and for measuring a fourth voltage between the ground port and the live port after a discharge process lasts for a second preset time;

[0014] a resistance measuring unit, used for measuring a first resistance value between the ground port and the neutral port and for measuring a second resistance value between the ground port and the live port;

[0015] A control unit, used for connecting the ground port and the neutral port to a DC voltage module when the first voltage is 0; obtaining a first detection result when the first resistance value is less than or equal to a first preset threshold; obtaining a second detection result when the first resistance value is greater than the first preset threshold; connecting the ground port and the neutral port in series to a load resistor for discharge when the first voltage is not 0; obtaining a second detection result when the second voltage is 0; reversely connecting the live port and the neutral port of the electrical device when the second voltage is not 0; connecting the ground port and the live port to the DC voltage module when the third voltage is 0 block; when the second resistance value is less than or equal to the second preset threshold value, the first detection result is obtained; when the second resistance value is greater than the second preset threshold value, the second detection result is obtained; when the third voltage is not 0, the ground port and the live wire port are connected in series to the load resistor for discharge; when the fourth voltage is 0, the second detection result is obtained; when the fourth voltage is not 0, the third detection result is obtained; wherein, the first detection result is used to characterize that the shell is reliably grounded, the second detection result is used to characterize that the shell is unreliably grounded or the shell is not grounded, and the third detection result is used to characterize that the ground wire connected to the shell is wrongly connected to other points.

[0016] Furthermore, in an embodiment of the present application, the DC voltage module includes a relay, a DC power supply, a current limiting resistor, and a positive terminal and a negative terminal; the DC power supply is connected to the relay; the relay is connected to the current limiting resistor, and the positive terminal is connected to the current limiting resistor; the negative terminal is grounded; the positive terminal is used to connect to the neutral line port or to connect to the live line port, and the negative terminal is used to connect to the ground port.

[0017] Furthermore, in the embodiment of the present application, the resistance of the load resistor is 5KΩ-15KΩ.

[0018] Furthermore, in an embodiment of the present application, the device includes a display unit; and the display unit is connected to the control unit.

[0019] On the other hand, the present application also provides a device for detecting the reliability of grounding of a housing of an electrical device, comprising:

[0020] at least one processor;

[0021] at least one memory for storing at least one program;

[0022] When the at least one program is executed by the at least one processor, the at least one processor implements a method for detecting the grounding reliability of a casing of an electrical equipment as described in any one of the invention contents.

[0023] In addition, the present application also provides a computer-readable storage medium, which stores processor-executable instructions. When the processor executes the instructions, the processor-executable instructions are used to execute a method for detecting the grounding reliability of the casing of an electrical equipment as described in any of the above items.

[0024] The advantages and benefits of the present application will be partially given in the following description, and partially become apparent from the following description, or be understood through the practice of the present application:

[0025] The present application can measure a first voltage between a ground port and a neutral port of an electrical device; when the first voltage is 0, the ground port and the neutral port are connected to a DC voltage module and a first resistance value between the ground port and the neutral port is measured; when the first resistance value is less than or equal to a first preset threshold value, a first detection result is obtained; when the first resistance value is greater than the first preset threshold value, a second detection result is obtained; when the first voltage is not 0, the ground port and the neutral port are connected in series to a load resistor for discharge; after the discharge process lasts for a first preset time, a second voltage between the ground port and the neutral port is measured; when the second voltage is 0, a second detection result is obtained; when the second voltage is not 0, the live port and the neutral port of the electrical device are reversed, and a third voltage between the ground port and the live port is measured; when the third voltage is 0, Connect the ground port and the live port to the DC voltage module and measure the second resistance value between the ground port and the live port; when the second resistance value is less than or equal to the second preset threshold, obtain the first detection result; when the second resistance value is greater than the second preset threshold, obtain the second detection result; when the third voltage is not 0, connect the ground port and the live port in series to the load resistor for discharge; after the discharge process continues for the second preset time, measure the fourth voltage between the ground port and the live port; when the fourth voltage is 0, obtain the second detection result; when the fourth voltage is not 0, obtain the third detection result; wherein, the first detection result is used to characterize that the shell grounding is reliable, the second detection result is used to characterize that the shell grounding is unreliable or the shell is not grounded, and the third detection result is used to characterize that the ground wire connected to the shell is wrongly connected to other points. The present application can reduce the artificial parameters in the detection process and use an algorithm to judge the grounding reliability. The present application can improve the detection accuracy and improve the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the connection terminals of the electrical equipment in the prior art;

[0027] Figure 2 A schematic diagram of the steps of a method for detecting the grounding reliability of an electrical equipment housing in a specific embodiment of the present invention;

[0028] Figure 3 It is a structural schematic diagram of a circuit where a DC voltage module and a load resistor are located in a specific embodiment of the present invention;

[0029] Figure 4 It is a flow chart of a method for measuring the grounding reliability of an electrical equipment housing in a specific embodiment of the present invention;

[0030] Figure 5 It is a module schematic diagram of an electrical equipment housing grounding status detector in a specific embodiment of the present invention;

[0031] Figure 6A schematic diagram of the circuit structure of a voltage stabilizing circuit in a specific embodiment of the present invention;

[0032] Figure 7 A schematic diagram of the circuit structure of a voltage stabilizing circuit in another specific embodiment of the present invention;

[0033] Figure 8 A schematic diagram of the circuit structure of a voltage measurement unit in a specific embodiment of the present invention;

[0034] Fig. 9 It is a circuit structure schematic diagram of a circuit where a DC voltage module and a load resistor are located in another specific embodiment of the present invention;

[0035] Fig.10 It is a structural schematic diagram of a device for detecting the grounding reliability of an electrical equipment casing in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below with reference to the accompanying drawings to explain the principles and processes of the method, equipment, device and storage medium for detecting the grounding reliability of the housing of an electrical device in the embodiments of the present invention.

[0037] The following are necessary explanations for the nouns that appear in this application:

[0038] To ensure the safety of electricity use, most electrical equipment for civil and industrial use is designed with casing grounding. The wiring principle is shown in the figure below:

[0039] like Figure 1 The figure shows the wiring diagram of the switching power supply. From the left, they are the input power live wire, input power neutral wire, ground wire, output power negative terminal, and output power positive terminal. For AC power-consuming equipment, the equipment can work normally even if the live wire and neutral wire are interchanged, because the power supply designed for the power-consuming equipment is mostly a full-bridge rectifier circuit; the equipment can work normally even if the neutral wire and ground wire are interchanged, because the neutral wire of the TT and TN systems are designed to be grounded. In practical applications, common wiring errors include: 1) the live wire and neutral wire are crossed; 2) the neutral wire and ground wire are crossed; 3) the ground wire is not connected or is not reliably connected. These common errors do not affect the normal use of the equipment and are not easy to be discovered.

[0040] When the above errors occur in residential electricity use, error 1 does not affect use and no one pays attention. Error 2 may trip the leakage protection and can be corrected to a certain extent. Error 3 may cause electric shock or burn equipment, and most injured people "consider themselves unlucky" and do not investigate further; industrial electricity production safety is extremely important, and the above errors need to be minimized as much as possible during production maintenance. However, in related technologies, the method of checking the above three wiring errors is to use the resistance position of the multimeter to measure the resistance between the casing and the ground grid when the installation is completed or the power is off to determine whether there is unreliable grounding. This test requires a lot of manual participation, and the test conditions require a power outage, resulting in low efficiency. In addition, the accuracy of the multimeter is limited, resulting in inaccurate test results.

[0041] In view of the above-mentioned defects of the prior art, Figure 2 , Figure 2 Schematic diagram of the steps of a method for detecting the grounding reliability of an electrical equipment housing provided in an embodiment of the present application. Figure 2 In the present invention, the method for detecting the reliability of grounding of the housing of the electrical equipment may include but is not limited to steps S101 to S113.

[0042] S101. Measure a first voltage between a ground port and a neutral port of an electrical device.

[0043] S102: When the first voltage is 0, connect the ground port and the neutral port to a DC voltage module and measure a first resistance value between the ground port and the neutral port.

[0044] S103: When the first resistance value is less than or equal to the first preset threshold, a first detection result is obtained.

[0045] S104. When the first resistance value is greater than the first preset threshold, a second detection result is obtained.

[0046] S105, when the first voltage is not 0, the ground port and the neutral port are connected in series to a load resistor for discharge. After the discharge process continues for a first preset time, a second voltage between the ground port and the neutral port is measured.

[0047] S106. When the second voltage is 0, a second detection result is obtained.

[0048] S107: When the second voltage is not 0, reversely connect the live port and the neutral port of the electrical device, and measure a third voltage between the ground port and the live port.

[0049] S108 . When the third voltage is 0, connect the ground port and the live port to a DC voltage module and measure a second resistance value between the ground port and the live port.

[0050] S109: When the second resistance value is less than or equal to the second preset threshold, a first detection result is obtained.

[0051] S110. When the second resistance value is greater than a second preset threshold, a second detection result is obtained.

[0052] S111, when the third voltage is not 0, the ground port and the live port are connected in series to a load resistor for discharge. After the discharge process continues for a second preset time, a fourth voltage between the ground port and the live port is measured.

[0053] S112. When the fourth voltage is 0, a second detection result is obtained.

[0054] S113. When the fourth voltage is not 0, obtain a third detection result.

[0055] It can be understood that the first detection result is used to characterize that the grounding of the shell is reliable, the second detection result is used to characterize that the grounding of the shell is unreliable or the shell is not grounded, and the third detection result can be used to characterize that the ground wire connected to the shell is mistakenly connected to other points. The first voltage can be the voltage between the ground port and the neutral port of the electrical equipment. The second voltage can be the voltage between the ground port and the neutral port after the ground port and the neutral port are connected in series with a load resistor for discharge for a first preset time. The third voltage can be the voltage between the ground port and the live port after the live port and the neutral port of the electrical equipment are reversed. The first preset threshold value can be an arbitrary value, and the specific value can be determined according to the circuit built by the user.

[0056] Furthermore, in some feasible embodiments of the present application, the first preset threshold is equal to the second preset threshold.

[0057] Furthermore, in some feasible embodiments of the present application, the first preset threshold is 10 ohms.

[0058] Furthermore, in some feasible embodiments of the present application, the first detection result, the second detection result or the third detection result is sent to a display unit so that the display unit displays the first detection result, the second detection result or the third detection result.

[0059] In addition, the embodiment of the present application also provides a device for detecting the reliability of grounding of the housing of an electrical device. The device can implement the above reliability detection method. The device may include: a voltage measurement unit, a resistance measurement unit, a control unit, and a load unit; the load unit includes a load resistor and a DC voltage module.

[0060] A voltage measuring unit is used to obtain a first voltage between the ground port and the neutral port of the electrical device, to measure a second voltage between the ground port and the neutral port after the discharge process lasts for a first preset time, to measure a third voltage between the ground port and the live port, and to measure a fourth voltage between the ground port and the live port after the discharge process lasts for a second preset time. A resistance measuring unit is used to measure a first resistance value between the ground port and the neutral port and to measure a second resistance value between the ground port and the live port. A control unit is used to connect the ground port and the neutral port to a DC voltage module when the first voltage is 0; to obtain a first detection result when the first resistance value is less than or equal to a first preset threshold; to obtain a second detection result when the first resistance value is greater than the first preset threshold; to connect the ground port and the neutral port in series to a load resistor for discharge when the first voltage is not 0; to obtain a second detection result when the second voltage is 0; to reversely connect the live port and the neutral port of the electrical device when the second voltage is not 0; to connect the ground port and the live port to a DC voltage module when the third voltage is 0; When the second resistance value is less than or equal to the second preset threshold, a first detection result is obtained; when the second resistance value is greater than the second preset threshold, a second detection result is obtained; when the third voltage is not 0, the ground port and the live wire port are connected in series to the load resistor for discharge; when the fourth voltage is 0, the second detection result is obtained; when the fourth voltage is not 0, the third detection result is obtained; wherein, the first detection result is used to characterize that the shell grounding is reliable, the second detection result is used to characterize that the shell grounding is unreliable or the shell is not grounded, and the third detection result is used to characterize that the ground wire connected to the shell is wrongly connected to other points.

[0061] Further, in the embodiments of the present application, refer to Figure 3 The DC voltage module includes a relay, a DC power supply, a current limiting resistor, and a positive terminal and a negative terminal. The DC power supply is connected to the relay; the relay is connected to the current limiting resistor, the positive terminal is connected to the current limiting resistor, and the negative terminal is grounded. The positive terminal is used to connect to the neutral port or the live port, and the negative terminal is used to connect to the ground port.

[0062] Further, in the embodiment of the present application, the resistance of the load resistor is 5KΩ-15KΩ, and is preferably 10KΩ.

[0063] Furthermore, in an embodiment of the present application, the device includes a display unit; the display unit is connected to the control unit.

[0064] The principle of this application is explained below with reference to the accompanying drawings:

[0065] The process of measuring the reliability of grounding of electrical equipment casing is as follows: Figure 4As shown, first measure the voltage between the equipment ground and N to determine whether there is voltage. If there is no voltage, the grounding may be unreliable and there is no induced voltage / it may also be reliable. By throwing a DC voltage to measure the resistance and calculate the loop resistance, the grounding is judged to be reliable if the resistance is less than 10Ω. If it is greater than 10Ω, the grounding is judged to be unreliable or not grounded. If there is voltage, it may be caused by the induced electromotive force of the ungrounded shell or the wrong wiring of L and N. It is necessary to throw a resistor to release the induced voltage and then measure the voltage. If the voltage disappears, the grounding is judged to be unreliable or not grounded. If the voltage does not disappear, it is judged to be caused by the wrong wiring of L and N. The wrong wiring of L and N requires changing the position for measurement, changing the ground and L for measurement, first measure the voltage to determine whether there is voltage. If there is no voltage, the grounding may be unreliable and there is no induced voltage / it may also be reliable. By throwing a DC voltage to measure the resistance and calculate the loop resistance, the grounding is judged to be reliable if the resistance is less than 10Ω, and the grounding is judged to be reliable if it is greater than 10Ω. If there is voltage, the ground wire of the shell is not equipotential and is mistakenly connected to other points.

[0066] Design an electrical equipment housing grounding status detector, its structure is as follows Figure 5 As shown, the instrument consists of a device power supply, a voltage measurement unit, a resistance measurement unit, a load circuit and a human-computer interaction module.

[0067] The electrical equipment housing grounding status detector is a portable device. For ease of use, the device is powered by 3 No. 5 batteries. The theoretical output of the battery is 4.5V. As the power consumption decreases, the voltage gradually decreases. To ensure the normal operation of the device, the MAX1818 voltage regulator chip is used to design a voltage regulator circuit to supply power to the device. The circuit is as follows Figure 6 As shown, the input range of MAX1818 is 2.5V~5.5V, and the output is 3.3V. The device can use the voltage regulator chip TL431 to design a 2.5V voltage regulator circuit. The 2.5V output can be used as the output voltage of the DC voltage module in the load circuit. The stable output 2.5V is used for sampling circuit benchmark calculation and measuring resistance standard power supply. The circuit is as follows Figure 7 shown.

[0068] The control module is also the main control MCU. The main control MCU can be designed with the STM32F103C8T6 model microcontroller, which is a 32-bit microcontroller of the STM32 series. The program memory capacity can be 64KB and the voltage required is 2V to 3.6V to meet the measurement and control requirements of the equipment.

[0069] Voltage measurement unit such as Figure 8As shown, the voltage is sampled from a small resistor after being divided by four resistors. The sampled voltage is designed with a two-stage amplifier circuit. The first-stage amplifier circuit is a common circuit. The feedback resistor of the amplifier circuit is designed with capacitors and resistors. The amplification factors for DC and AC are different. The second-stage DC voltage amplifier circuit uses the feedback resistor of the amplifier circuit to design capacitors and resistors to filter out AC signals. The second-stage AC voltage amplifier circuit first designs capacitors to isolate DC, and then uses pure resistors to amplify to ensure that the AC signal is expected. The "+" and "-" in the figure are the input of the meter pen. AC-ADC is the AC sampling point, which is connected to the ADC function I / O port of the main control MCU. AD-MAX is the DC sampling point, which is connected to another I / O port of the ADC function of the main control MCU. AC voltage is used to determine the measured potential, and DC voltage is used to calculate the measured loop resistance.

[0070] like Fig. 9 As shown, the load circuit of the present application includes a DC voltage module and a load resistor. The DC voltage module of the present application includes a relay, a 100Ω resistor, a 2.5V power supply, and positive and negative terminals. The load resistor includes a relay, a 10KΩ resistor, and positive and negative terminals. The load resistor or the DC voltage module is input through the relay. The present application uses a 3.3V voltage-driven relay, and the REL1 relay controls the input of a 10k load resistor, which can release the induced virtual potential. The REL2 relay controls a 100Ω resistor mounted between the 2.5V power supply and the circuit under test. The 100Ω resistor and the 2.5V power supply are used to measure the resistance of the circuit under test.

[0071] The instrument can also use a 5.6-inch resistance screen to display the measurement results. At the same time, the "power" button, "test" button, and "L / N transposition test" button are designed as test control inputs. After the instrument is turned on, the AC voltage measurement program is kept running, and the display shows the AC voltage value. After the tester connects the test lead to the target position, press the "test" button, and the instrument tests the reliability of the shell grounding. During the test, the instrument first determines the AC voltage. If there is no voltage, the DC current is input through the relay control to calculate the loop resistance, and the test results of "reliable grounding" or "unreliable grounding / no grounding" are output; if there is voltage, the relay control input resistor absorbs the induced electromotive force and then measures the AC voltage to determine the loop situation, and outputs "unreliable grounding / no grounding" or "L / N wiring is reversed or the ground wire access potential is abnormal" results; the output results are distinguished according to the key command. If the "test" button is pressed for testing, the L / N wiring is reversed, and if the "L / N transposition test" button is pressed for testing, the ground wire access potential is abnormal and requires manual secondary measurement.

[0072] In summary, the electrical equipment housing grounding reliability detection method of the present application has the following advantages:

[0073] This application can avoid the tedious operation of traditional multimeter testing, which may cause damage to equipment or personal injury due to operating errors. This application can improve the efficiency of electrical equipment grounding reliability detection, effectively detect the reliable grounding status of electrical equipment casing, promptly repair unreliable grounding equipment, and ensure electricity safety.

[0074] and Figure 1 Corresponding to the method, the embodiment of the present application also provides a device for detecting the reliability of grounding of the housing of an electrical device, and its specific structure can be referred to Fig.10 ,include:

[0075] at least one processor 1011;

[0076] At least one memory 1012, used to store at least one program;

[0077] When the at least one program is executed by the at least one processor, the at least one processor implements the method for detecting the grounding reliability of the casing of the electrical equipment.

[0078] The contents of the above method embodiments are all applicable to the present device embodiments. The functions specifically implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0079] and Figure 1 Corresponding to the method, an embodiment of the present application further provides a computer-readable storage medium, which stores instructions executable by a processor, and the instructions executable by the processor are used to execute the method for detecting the grounding reliability of the casing of the electrical equipment when executed by the processor.

[0080] The contents of the above-mentioned embodiments of the method for detecting the reliability of grounding of the casing of electrical equipment are all applicable to the embodiments of this storage medium. The functions specifically implemented by the embodiments of this storage medium are the same as those of the above-mentioned embodiments of the method for detecting the reliability of grounding of the casing of electrical equipment, and the beneficial effects achieved are also the same as those achieved by the above-mentioned embodiments of the method for detecting the reliability of grounding of the casing of electrical equipment.

[0081] In some selectable embodiments, the function / operation mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the function / operation involved, the two boxes shown in succession can actually be executed substantially simultaneously or the boxes can sometimes be executed in reverse order. In addition, the embodiment presented and described in the flow chart of the application is provided by way of example, for the purpose of providing a more comprehensive understanding of technology. The disclosed method is not limited to the operation and logic flow presented herein. Selectable embodiments are expected, wherein the order of various operations is changed and the sub-operation of a part for which is described as a larger operation is performed independently.

[0082] In addition, although the present application is described in the context of functional modules, it should be understood that, unless otherwise specified, one or more of the functions and / or features can be integrated into a single physical device and / or software module, or one or more functions and / or features can be implemented in a separate physical device or software module. It is also understood that a detailed discussion of the actual implementation of each module is unnecessary for understanding the present application. More specifically, in view of the properties, functions, and internal relationships of the various functional modules in the device disclosed herein, the actual implementation of the module will be understood within the conventional techniques of the engineer. Therefore, those skilled in the art can implement the present application set forth in the claims without excessive experimentation using ordinary techniques. It is also understood that the specific concepts disclosed are merely illustrative and are not intended to limit the scope of the present application, which is determined by the full scope of the attached claims and their equivalents.

[0083] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several programs to enable a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0084] The logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable programs for implementing the logical functions, and may be embodied in any computer-readable medium for use by a program execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch and execute a program from a program execution system, device or apparatus), or in conjunction with such program execution systems, devices or apparatuses. For purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use by a program execution system, device or apparatus, or in conjunction with such program execution systems, devices or apparatuses.

[0085] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0086] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable program execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0087] In the above description of this specification, the description with reference to the terms "one embodiment / example", "another embodiment / example" or "certain embodiments / examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0088] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

[0089] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the described embodiments. Technical personnel familiar with the field may make various equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A method for detecting the reliability of grounding of an electrical equipment casing, characterized in that: The following steps are involved: Measuring a first voltage between a ground port and a neutral port of an electrical device; When the first voltage is 0, the ground port and the neutral port are connected to a DC voltage module and a first resistance value between the ground port and the neutral port is measured; When the first resistance value is less than or equal to a first preset threshold, a first detection result is obtained; When the first resistance value is greater than the first preset threshold, a second detection result is obtained; When the first voltage is not 0, the ground port and the neutral line port are connected in series to a load resistor for discharge; After the discharge process continues for a first preset time, measuring a second voltage between the ground port and the neutral line port; When the second voltage is 0, a second detection result is obtained; When the second voltage is not 0, the live port and the neutral port of the electrical device are reversely connected, and a third voltage between the ground port and the live port is measured; When the third voltage is 0, the ground port and the live port are connected to the DC voltage module and a second resistance value between the ground port and the live port is measured; When the second resistance value is less than or equal to a second preset threshold, obtaining the first detection result; When the second resistance value is greater than the second preset threshold, obtaining the second detection result; When the third voltage is not 0, the ground port and the live port are connected in series to the load resistor for discharge; After the discharge process continues for a second preset time, measuring a fourth voltage between the ground port and the live port; When the fourth voltage is 0, a second detection result is obtained; When the fourth voltage is not 0, obtaining a third detection result; Among them, the first detection result is used to indicate that the shell grounding is reliable, the second detection result is used to indicate that the shell grounding is unreliable or the shell is not grounded, and the third detection result is used to indicate that the ground wire connected to the shell is wrongly connected to other points.

2. A method for detecting the reliability of grounding of an electrical equipment housing according to claim 1, characterized in that: The first preset threshold is equal to the second preset threshold.

3. A method for detecting the reliability of grounding of an electrical equipment housing according to claim 2, characterized in that: The first preset threshold is 10 ohms.

4. A method for detecting the reliability of grounding of an electrical equipment housing according to claim 1, characterized in that: The first detection result, the second detection result, or the third detection result is sent to a display unit, so that the display unit displays the first detection result, the second detection result, or the third detection result.

5. A device for detecting the reliability of grounding of the housing of an electrical equipment, characterized in that: For implementing the method described in any one of claims 1 to 4, the device comprises: a voltage measuring unit, a resistance measuring unit, a control unit and a load unit; the load unit comprises a load resistor and a DC voltage module; a voltage measuring unit, for obtaining a first voltage between a ground port and a neutral port of an electric device, for measuring a second voltage between the ground port and the neutral port after a discharge process lasts for a first preset time, for measuring a third voltage between the ground port and the live port, and for measuring a fourth voltage between the ground port and the live port after a discharge process lasts for a second preset time; a resistance measuring unit, used for measuring a first resistance value between the ground port and the neutral port and for measuring a second resistance value between the ground port and the live port; A control unit, used for connecting the ground port and the neutral port to a DC voltage module when the first voltage is 0; obtaining a first detection result when the first resistance value is less than or equal to a first preset threshold; obtaining a second detection result when the first resistance value is greater than the first preset threshold; connecting the ground port and the neutral port in series to a load resistor for discharge when the first voltage is not 0; obtaining a second detection result when the second voltage is 0; reversely connecting the live port and the neutral port of the electrical device when the second voltage is not 0; connecting the ground port and the live port to the DC voltage module when the third voltage is 0 block; when the second resistance value is less than or equal to the second preset threshold value, the first detection result is obtained; when the second resistance value is greater than the second preset threshold value, the second detection result is obtained; when the third voltage is not 0, the ground port and the live wire port are connected in series to the load resistor for discharge; when the fourth voltage is 0, the second detection result is obtained; when the fourth voltage is not 0, the third detection result is obtained; wherein, the first detection result is used to characterize that the shell is reliably grounded, the second detection result is used to characterize that the shell is unreliably grounded or the shell is not grounded, and the third detection result is used to characterize that the ground wire connected to the shell is wrongly connected to other points.

6. The electrical equipment housing grounding reliability detection device according to claim 5, characterized in that: The DC voltage module includes a relay, a DC power supply, a current limiting resistor, and a positive terminal and a negative terminal; the DC power supply is connected to the relay; the relay is connected to the current limiting resistor, and the positive terminal is connected to the current limiting resistor; the negative terminal is grounded; the positive terminal is used to connect to the neutral port or the live port, and the negative terminal is used to connect to the ground port.

7. The electrical equipment housing grounding reliability detection device according to claim 5, characterized in that: The resistance of the load resistor is 5KΩ-15KΩ.

8. The electrical equipment housing grounding reliability detection device according to claim 5, characterized in that: The device comprises a display unit; the display unit is connected to the control unit.

9. A device for detecting the reliability of grounding of an electrical equipment casing, characterized in that include: at least one processor; at least one memory for storing at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements a method for detecting the grounding reliability of the casing of an electrical equipment as described in any one of claims 1 to 4.

10. A computer-readable storage medium storing instructions executable by a processor, characterized in that: The processor executable instructions are used to execute a method for detecting the grounding reliability of a casing of an electrical equipment as described in any one of claims 1 to 4 when executed by the processor.

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