Abnormality detection device for ground potential of connecting sheet and abnormality detection method thereof

Abstract

The invention discloses an anomaly detection device and an anomaly detection method for ground potential of a connecting piece. According to the device, the main body bears the core main control chip so as to protect the core main control chip from being influenced by the external environment. The main control chip is provided with two independent test interfaces, so that the test connecting pieces connected with the test interfaces are used for synchronously collecting analog voltage signals at the upper end and the lower end of the connecting piece to be tested. The main control chip compares and analyzes the potential to ground of the upper end and the lower end based on the preset normal potential relation matched with the type and the switch state of the connecting piece so as to accurately judge abnormal grounding information, finally, the voltage value and the abnormal information are displayed in real time through the touch display screen, and accurate and visual detection of abnormal grounding of the connecting piece is achieved. Therefore, the detection difficulty can be reduced, grounding abnormity can be found and positioned in time, and equipment faults and safety accidents can be prevented.

Description

Technical Field

[0001] This application relates to the field of power system technology, and in particular to an abnormal detection device and method for the ground potential of a connecting piece. Background Technology

[0002] As crucial secondary equipment in substations, protection devices play a vital role in quickly isolating faults and preventing the escalation of accidents during substation operation, making them indispensable electrical equipment in substations. The protection connection piece is a disconnectable node in the protection device circuit. Before engaging the protection output and tripping the connection piece, the voltage to ground at each end of the connection piece must be measured and confirmed to be normal. Otherwise, situations such as stuck protection device action contacts, relay failure to reset, or parasitic circuits can cause malfunctions in the protection system. Poor contact in the connection piece wiring can also cause the protection system to fail to operate.

[0003] Traditional voltage measurement of connector plates involves one operator using one hand to ground the common terminal of the instrument while using the other hand to measure and record the voltage at the upper and lower ends of the connector plate. This method is inefficient, and using the wrong multimeter setting or jack during measurement often leads to power accidents. Furthermore, accurately judging the voltage readings requires operators to possess certain theoretical knowledge; otherwise, misjudgments are prone to occur. Summary of the Invention

[0004] In view of this, this application provides a device and method for detecting abnormal potential of a connecting piece to ground.

[0005] According to a first aspect of this application, an abnormality detection device for the ground potential of a connecting piece is provided, the device comprising: main body; A test connector is detachably connected to the upper and lower ends of the connector under test. The test connector is used to simultaneously measure the analog voltage signals at the upper and lower ends of the connector under test. A grounding connector, which is detachably connected to the grounding terminal of the device to which the test connection piece belongs; The main control chip is located within the main body. The main control chip has two test interfaces and one common ground interface. The two test interfaces are connected to the test connectors via cables, and the common ground interface is connected to the ground connector. The main control chip is used to determine the abnormal grounding information of the test connector based on the comparison between the upper and lower ground potentials of the test connector and the normal potential. The normal potential relationship is set based on the connector type and switch state of the test connector. A touch screen is disposed on the surface of the main body and electrically connected to the main control chip. The touch screen is used to receive detection commands and display the upper end voltage value to ground, the lower end voltage value to ground, and the abnormal grounding information.

[0006] Optionally, the test connector includes: A U-shaped housing, wherein the side of the U-shaped housing facing the connecting piece to be tested has a concave surface that matches the shape of the connecting piece to be tested; Two elastic probes are disposed within the concave surface, and their positions correspond to the connection holes on the connector piece to be tested. When the U-shaped housing is fitted onto the connector under test, the two elastic probes extend into the bottom of the connection hole and contact the metal signal end of the connector under test.

[0007] Optionally, the elastic probe is configured as a stretchable structure.

[0008] Optionally, the side of the U-shaped housing facing away from the test connector is provided with markings for marking the upper and lower ends of the test connector.

[0009] Optionally, the grounding connector includes a clamping member and a magnetic cable clip, the magnetic cable clip having a receiving groove; wherein, when the clamping member is clamped at the grounding end, the magnetic cable clip is used to attract the cable connected to the clamping member to the surface of the device to which the test connector belongs.

[0010] Optionally, the device further includes: A lithium battery is disposed within the main body and electrically connected to the main control chip. The lithium battery is provided with a charging input interface. The main control chip is also used to read the remaining power of the lithium battery and transmit the remaining power to the touch screen for display.

[0011] Optionally, the device further includes: An alarm buzzer is installed inside the main body and electrically connected to the main control chip. The alarm buzzer is used to respond to the alarm command transmitted by the main control chip and trigger an alarm prompt.

[0012] Optionally, the device further includes: A connector is disposed on the side of the main body near the device to which the test connector belongs, and the connector is used to fix the main body to the device to which the test connector belongs. The connectors include buckles, magnetic components, suction cups, and hooks.

[0013] Optionally, the main control chip further includes: a control unit and two analog-to-digital converters; The two analog-to-digital converters are respectively connected to the two test interfaces, and the analog signal of the potential difference between the connection piece under test and the ground terminal is converted into a digital signal and transmitted to the control unit.

[0014] According to a second aspect of this application, an anomaly detection method is provided for an anomaly detection device applied to an anomaly detection device for a connection piece to ground potential, the method comprising: The touch screen responds to the input operation, receives the detection command, and transmits the detection command to the main control chip. The detection command includes the connection type and switch status of the connection piece under test. The main control chip responds to the detection command by acquiring the upper end voltage value to ground and the lower end voltage value to ground of the connector under test. The main control chip determines the abnormal grounding information of the connection piece under test based on the comparison results of the upper end to ground voltage value and the lower end to ground voltage value with the normal potential. The main control chip sends the upper-to-ground voltage value, the lower-to-ground voltage value, and the abnormal grounding information to the touch screen, and the touch screen displays the upper-to-ground voltage value, the lower-to-ground voltage value, and the abnormal grounding information.

[0015] Optionally, the main control chip determines the abnormal grounding information of the connection piece under test based on the comparison results of the upper-to-ground voltage value and the lower-to-ground voltage value with the normal potential, including: When the connection piece type is a trip output connection piece and the switch state is closed, if the upper end voltage value to ground is within the first bus voltage range and the lower end voltage value to ground is within the ground potential range, it is determined to be able to be put into operation; otherwise, it is determined to be unable to be put into operation. When the connection piece type is a trip output connection piece and the switch state is open, if the voltage value of the upper end to ground is greater than the voltage range of the second bus, and the voltage value of the lower end to ground is within the ground potential range, it is determined to be able to be turned on; otherwise, it is determined to be unable to be turned on. When the connection piece type is a closing output connection piece and the switch state is closed, if the voltage value of the upper end to ground is greater than the voltage range of the second bus, and the voltage value of the lower end to ground is within the grounding potential range, it is determined to be able to be put into operation; otherwise, it is determined to be unable to be put into operation. When the connection piece type is a closing output connection piece and the switch state is open, if the upper end voltage value to ground is within the first bus voltage range and the lower end voltage value to ground is within the ground potential range, it is determined to be able to be turned on; otherwise, it is determined to be unable to be turned on. When the connecting piece type is a switch output connecting piece for other protection tripping, if the voltage value to ground at the upper end is greater than the voltage range of the second bus, and the voltage value to ground at the lower end is within the grounding potential range, it is determined to be able to be turned on; otherwise, it is determined to be unable to be turned on. Wherein, the first bus voltage range is used to represent the positive terminal voltage of the control bus to ground, and the second bus voltage range is used to represent the negative terminal voltage of the control bus to ground.

[0016] Using the above technical solution, the abnormal ground potential detection device for the connector comprises a main body, a test connector, a grounding connector, a main control chip, and a touch screen. The main body houses the core main control chip, which has two independent test interfaces. These interfaces are connected to the test connectors to simultaneously acquire analog voltage signals from the upper and lower ends of the connector under test. A potential reference is constructed using a common ground reference provided by the grounding connector. Based on a preset normal potential relationship matched to the connector type and switch state, the main control chip compares and analyzes the ground potentials at the upper and lower ends to accurately determine abnormal grounding information. Finally, the voltage value and abnormal information are displayed in real time on the touch screen, achieving accurate and intuitive detection of grounding anomalies in the connector. This device can simultaneously acquire the ground potentials at both ends of the connector, and combined with customized normal potential relationships, improves the accuracy and specificity of anomaly detection. It reduces detection difficulty, facilitates timely detection and location of grounding anomalies, and prevents equipment failures and safety accidents.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 A schematic diagram of the structure of the abnormal detection device for the ground potential of the connecting piece provided in an embodiment of this application is shown; Figure 2 This paper shows a structural block diagram of the abnormal detection device for the ground potential of the connecting piece provided in an embodiment of this application; Figure 3 A schematic diagram of the structure of the test connector provided in an embodiment of this application is shown; Figure 4 A schematic diagram of the structure of the connector to be tested provided in an embodiment of this application is shown; Figure 5A flowchart illustrating the anomaly detection method provided in an embodiment of this application is shown; Figure 6 This illustration shows an application diagram of the abnormal ground potential detection device for the connecting piece provided in an embodiment of this application.

[0019] Figure label: 110 Main body, 111 Control unit, 112 Analog-to-digital converter, 120 Test connector, 121 U-shaped housing, 122 Elastic probe, 130 Grounding connector, 131 Clamping component, 132 Magnetic wire clip, 140 Touch screen, 150 Lithium battery, 151 Charging input interface, 160 Alarm buzzer, 300 Test connector, 310 Base, 320 Connection hole. Detailed Implementation

[0020] The present application will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present application can be combined with each other.

[0021] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this application means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “attached” to another element, it can be directly connected or attached to the other element, or there may be intermediate elements. Furthermore, “connected” or “attached” as used herein can include wireless connections or wireless interconnections. The term “and / or” as used herein includes all or any unit and all combinations of one or more associated listed items.

[0023] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0024] This embodiment provides a device for detecting abnormal ground potential of a connecting piece, such as... Figure 1 and Figure 2 As shown, the device includes: a main body 110, a test connector 120, a grounding connector 130, a main control chip (not shown in the figure), and a touch display screen 140.

[0025] The test connector 120 is detachably connected to the upper and lower ends of the test piece 300. The test connector 120 is used to simultaneously measure the analog voltage signals at the upper and lower ends of the test piece 300.

[0026] Grounding connector 130 is detachably connected to the grounding terminal of the device to which the test connector 300 belongs.

[0027] The main control chip is located inside the main body 110. The main control chip has two test interfaces and one common ground interface. The two test interfaces are connected to the test connector 120 through cables respectively, and the common ground interface is connected to the ground connector 130. The main control chip is used to determine the abnormal grounding information of the connector 300 under test based on the comparison results of the relationship between the upper end to ground potential and the lower end to ground potential of the connector 300 under test and the normal potential.

[0028] The touch display screen 140 is disposed on the surface of the main body 110 and is electrically connected to the main control chip. The touch display screen 140 is used to receive detection commands and display the upper voltage value to ground, the lower voltage value to ground, and abnormal grounding information.

[0029] The normal potential relationship is set based on the connection type and switch state of the connection piece under test.

[0030] The abnormal ground potential detection device for connector plates provided in this application embodiment uses a main control chip mounted on the main body to protect it from external environmental influences. The main control chip is equipped with two independent test interfaces to simultaneously acquire analog voltage signals from the upper and lower ends of the connector plate under test using test connectors connected to these interfaces. A potential reference benchmark is constructed by combining the common ground reference provided by the grounding connector. Based on a preset normal potential relationship matched to the connector plate type and switch state, the main control chip compares and analyzes the ground potentials at the upper and lower ends to accurately determine abnormal grounding information. Finally, the voltage value and abnormal information are displayed in real time on a touch screen, achieving accurate and intuitive detection of grounding anomalies in the connector plate. This device can simultaneously acquire the ground potentials at both ends of the connector plate, and combined with customized normal potential relationships, improves the accuracy and specificity of anomaly detection, reduces detection difficulty, facilitates timely detection and location of grounding anomalies, and prevents equipment failures and safety accidents.

[0031] In one embodiment, such as Figure 3As shown, the connection piece 300 under test can be the output connection piece of a substation protection device. The connection piece 300 includes a base 310 with two connecting holes 320, one above the other, to ensure secure contact between the metal end of the connection piece and external wires or terminals. Above the base 310 is a cylindrical pivot connected to a movable rectangular cover plate, which can rotate around the pivot. Correspondingly, as... Figure 4 As shown, the test connector includes a U-shaped housing 121 and two elastic probes 122.

[0032] The U-shaped housing 121 has a concave surface on the side facing the connector 300 under test, which matches the shape of the connector 300. The recessed space of the concave surface is slightly larger than the outer dimensions of the connector 300, so that the U-shaped housing 121 can fit onto the connector 300. Two elastic probes 122 are disposed within the recessed space of the concave surface, and their positions correspond to the connection holes 320 on the connector 300 under test. The elastic probes 122 are directly connected to the core of the cable. When the U-shaped housing 121 is fitted onto the connector 300 under test, the two elastic probes 122 extend into the bottom of the connection holes 320 and contact the metal signal terminals of the connector 300 under test.

[0033] In this embodiment, the test connector uses a U-shaped housing with a concave surface that matches the shape of the connector under test. This ensures accurate positioning during assembly and allows the connector to fit stably and securely against the connector during testing, achieving precise positioning and a stable fit. Two elastic probes inside the U-shaped housing correspond precisely to the connection hole positions, ensuring reliable insertion into the bottom of the connection hole during testing and achieving stable, low-impedance electrical contact with the metal signal terminal. Simultaneously, the elastic design accommodates slight dimensional differences in the connection hole, preventing damage to the connector or probes from rigid contact. Furthermore, it adapts to the testing requirements of the connector in different states (engaged / unengaged), improving testing convenience and compatibility.

[0034] In practical application scenarios, such as Figure 4 As shown, the elastic probe 122 is constructed as a telescopic structure. This allows it to adapt to slight differences in the depth of the connecting hole and the position of the metal end of the connecting piece, ensuring stable contact of the probe with the signal end and avoiding poor contact due to dimensional deviations. Furthermore, during the process of fitting the U-shaped housing into the connecting piece, the telescopic characteristic can buffer the force during assembly, allowing the probe to enter the connecting hole more smoothly and preventing excessive pressure from the probe from damaging the metal end of the connecting piece or the connecting hole.

[0035] In practical applications, the side of the U-shaped shell facing away from the test connector has markings to indicate the top and bottom of the test connector.

[0036] In this embodiment, the markings on the upper and lower ends of the housing help operators quickly distinguish the upper and lower ends of the connector to be tested, avoiding incorrect probe connection to the connector hole due to confusion in orientation during testing, ensuring correct test signal correspondence, and reducing the assembly difficulty of the test connector. Furthermore, when testing different connectors in batches, it can reduce the time spent checking the orientation and improve testing efficiency.

[0037] In one embodiment, such as Figure 1 As shown, the grounding connector 130 includes a clamping member 131 and a magnetic cable clip 132, the magnetic cable clip 132 having a receiving groove. When the clamping member 131 is clamped at the grounding end, the magnetic cable clip 132 is used to attract the cable connected to the clamping member 131 to the surface of the device to which the test connector 300 belongs.

[0038] Specifically, the clamping element 131 can be configured as an alligator clip.

[0039] In this embodiment, one end of the clamp can be connected to the grounding terminal, and the other end is electrically connected to the cable. The combination design of the clamp and the magnetic cable clip allows the cable connected to the clamp to be positioned by the magnetic cable clip through the receiving groove and to be attracted to the equipment surface by magnetic attraction. This enables quick cable arrangement and flexible positioning, preventing the clamp from becoming loose from the grounding terminal due to dragging or shaking of the cable during testing. This ensures the stability of the grounding connection and the safety of the test, and is especially suitable for grounding test requirements in densely equipped scenarios such as substations.

[0040] In one embodiment, such as Figure 2 As shown, the abnormal detection device for the connection piece to ground potential also includes: lithium battery 150.

[0041] The lithium battery 150 is housed within the main body 110 and is electrically connected to the main control chip. The lithium battery 150 is equipped with a charging input interface 151. The main control chip also reads the remaining power of the lithium battery 150 and transmits this power to the touchscreen display 140 for display.

[0042] In this embodiment, a lithium battery powers the entire anomaly detection device, allowing it to operate independently without an external power source. This eliminates the need for external power supplies to detect anomalies in the device's connection points, without affecting the protection circuit. Measurements are safe and accurate, making it suitable for mobile testing in densely populated environments such as substations, thus improving operational flexibility. The lithium battery is equipped with a charging input interface, enabling rechargeable use and enhancing the device's economy and practicality. Simultaneously, the main control chip reads the remaining battery power and displays it in real-time on a touchscreen, allowing operators to intuitively monitor the device's power supply status and anticipate whether the battery capacity meets testing requirements. This prevents test interruptions, data loss, or device malfunctions due to battery depletion, ensuring the continuity and reliability of testing.

[0043] Specifically, the charging input interface can be a TYPE-C interface, and the charging voltage is DC 5V, so that the device can be charged by a universal charger.

[0044] In one embodiment, such as Figure 2 As shown, the abnormal detection device for the connection piece to ground potential also includes: an alarm buzzer 160.

[0045] The alarm buzzer 160 is located within the main body 110 and is electrically connected to the main control chip. The alarm buzzer 160 is used to respond to alarm commands transmitted by the main control chip and trigger an alarm notification.

[0046] In this embodiment, the alarm buzzer is electrically connected to the main control chip and responds to alarm commands to trigger prompts. It can quickly provide feedback on test abnormalities (such as poor grounding, signal interruption, low power, probe contact failure, etc.) with sound signals. Operators do not need to keep a close eye on the touch screen during the test to know the working status of the equipment in real time, avoiding test data errors, equipment damage, or even personnel safety risks caused by abnormal conditions. This further improves the safety and reliability of test operations in substation scenarios.

[0047] In one embodiment, the device for detecting abnormal ground potential of the connecting piece further includes a connector.

[0048] The connector is located on the side of the main body close to the device to which the connector to be tested belongs, and the connector is used to fix the main body to the device to which the connector to be tested belongs.

[0049] Specifically, the connectors include clips, magnetic components, suction cups, and hooks.

[0050] In this embodiment, the connector allows for rapid fixation of the main body to the device to which the test piece belongs, eliminating the need for operator support during testing. It also prevents the main body from shifting or detaching due to external force or equipment vibration. This improves the accuracy of test results and reduces the difficulty of operating the device.

[0051] In one embodiment, such as Figure 2 As shown, the main control chip includes: a control unit 111 and a two-channel analog-to-digital converter 112.

[0052] The two analog-to-digital converters 112 are connected to two test interfaces respectively. The analog-to-digital converters 112 are used to convert the analog potential difference signal between the connection piece under test 300 and the ground terminal into a digital signal and transmit it to the control unit 111. The control unit 111 is used to perform data processing, logic judgment, trigger display, and trigger alarm.

[0053] In this embodiment, an independent design with two analog-to-digital converters connected to two test interfaces is adopted. This design enables the synchronous acquisition of the analog potential difference signal between the connection piece under test and the grounding terminal, and each converter completes its own digital-to-analog conversion. This achieves parallel processing of the potential difference signal, avoids signal crosstalk during single-channel conversion or phase deviation caused by time-division acquisition, ensures the acquisition accuracy and synchronization of digital signals, and provides accurate data support for subsequent signal analysis of the control unit.

[0054] For example, such as Figure 1 As shown, during the on-site operation of the connecting piece voltage measurement, the operator attaches the abnormality detection device to the panel of the cabinet, connects the grounding connector 130 to the common grounding terminal of the cabinet, turns on the device power switch, and the device displays a zero voltage. The operator selects the pressure plate type and switch status on the device's touch display screen 140, and then places the U-shaped test connector 120 on the unengaged connecting piece. The LED digital tube displays the voltage at the upper and lower ends of the connecting piece, and at the same time, the touch LCD screen displays the judgment result of whether the connecting piece can be engaged. If it cannot be engaged, it will also display alarm information such as the lower end potential of the connecting piece is not zero, voltage positive and negative error, voltage amplitude is too small, and voltage amplitude is too large.

[0055] The abnormal detection device for the outlet connection piece of the protection device is compact, portable, and easy to operate. Its U-shaped test connector 120 can be inserted into the connection hole of the connection piece seat to simultaneously measure the voltage at the upper and lower ends of the connection piece 300 under test, effectively reducing operation steps and improving work efficiency. The grounding connector 130 has a double-safety grounding clamp structure, ensuring a firm and secure grounding point that is not easily loosened, eliminating the need for continuous manual pressing and fixing by personnel. The main unit of the device uses a magnetic fixing method, saving personnel the trouble of holding the instrument. The analog-to-digital converter adopts an independent dual-channel structure, ensuring that the voltage measurements at the upper and lower ends of the connection piece do not interfere with each other. Furthermore, the tool's operating power supply is independently powered by a lithium battery, which has no impact on the protection circuit, ensuring safe and accurate measurements. When an abnormal potential occurs in the connection piece 300 under test, the device automatically detects it and issues an audible and visual alarm to prevent misoperation during substation operation. It is intelligent, reliable, and has high promotional value.

[0056] This embodiment provides a method for detecting abnormal ground potential of a connector, such as... Figure 5 As shown, the method includes: Step 501: The touch screen responds to the input operation, receives the detection command, and transmits the detection command to the main control chip.

[0057] The detection instructions include the connection type and switch status of the connection piece under test. Specifically, the connection type includes trip output connection pieces, closing output connection pieces, and protection trip output connection pieces, etc. The switch status includes closed and open.

[0058] Step 502: In response to the detection command, the main control chip collects the voltage values ​​of the upper end to ground and the lower end to ground of the connector under test.

[0059] Step 503: The main control chip determines the abnormal grounding information of the connection piece under test based on the comparison results of the upper and lower voltage values ​​to ground with the normal potential.

[0060] Step 504: The main control chip sends the upper-to-ground voltage value, the lower-to-ground voltage value, and the abnormal grounding information to the touch screen, and the touch screen displays the upper-to-ground voltage value, the lower-to-ground voltage value, and the abnormal grounding information.

[0061] In this embodiment, after the tester connects the test connector and the grounding connector to the grounding terminal of the device, respectively, the tester turns on the device's power switch. The device displays a zero voltage. The tester then inputs a test command containing the type of the connector under test and its switch status via the touchscreen display. This allows the main control chip to perform targeted voltage acquisition. By simultaneously acquiring the upper and lower voltage values ​​to ground, it uses a dual-parameter comparison analysis to determine abnormal grounding information, thereby accurately locating the specific location or type of grounding anomaly. Furthermore, the main control chip can feed back the test results to the touchscreen display in real time, allowing the operator to intuitively grasp the grounding status and specific parameters of the connector. This reduces manual intervention, improves testing efficiency, avoids human error caused by manual calculation and judgment, and ensures the reliability of the test results.

[0062] In one embodiment, the main control chip determines the abnormal grounding information of the connection piece under test based on the comparison results of the upper and lower voltage values ​​to ground with the normal potential. This includes: when the connection piece type is a trip output connection piece and the switch state is closed, if the upper voltage value to ground is within the first bus voltage range and the lower voltage value to ground is within the ground potential range, it is determined to be operable; otherwise, it is determined to be inoperable. When the connection piece type is a trip output connection piece and the switch state is open, if the upper voltage value to ground is greater than the second bus voltage range and the lower voltage value to ground is within the ground potential range, it is determined to be operable; otherwise, it is determined to be inoperable. When the connection piece type is a closed connection piece... When the outlet connection piece is in the closed position and the switch is in the closed position, if the voltage value to ground at the upper end is greater than the voltage range of the second busbar and the voltage value to ground at the lower end is within the grounding potential range, it is determined to be able to be put into operation; otherwise, it is determined to be unable to be put into operation. When the connection piece type is a closing outlet connection piece and the switch is in the open position, if the voltage value to ground at the upper end is within the voltage range of the first busbar and the voltage value to ground at the lower end is within the grounding potential range, it is determined to be able to be put into operation; otherwise, it is determined to be unable to be put into operation. When the connection piece type is an outlet connection piece for other protection interlocking switches, if the voltage value to ground at the upper end is greater than the voltage range of the second busbar and the voltage value to ground at the lower end is within the grounding potential range, it is determined to be able to be put into operation; otherwise, it is determined to be unable to be put into operation.

[0063] The first bus voltage range represents the positive voltage of the control bus to ground, and the second bus voltage range represents the negative voltage of the control bus to ground. The first bus voltage range, the second bus voltage range, and the grounding potential range can be reasonably set according to ±5% of the standard bus voltage.

[0064] In this embodiment, a dual-dimensional classification and judgment logic based on connection type and switch status is used to set appropriate voltage judgment thresholds for different types of connection pieces, such as trip output, closing output, and other protection interlocking output, as well as different switch states, such as closed and open. This enables accurate identification of grounding anomalies caused by connection piece errors, poor contact, insulation damage, etc., and precise differentiation between "can be turned on" and "cannot be turned on" states, providing clear guidance for subsequent fault diagnosis.

[0065] For example, the normal potential of the connector is shown in Table 1.

[0066] Table 1

[0067] like Figure 6 As shown, the current measured upper potential value is -110.29, and the lower potential value is -0.26. The pressure plate type is selected as "Switch Protection Trip Output Pressure Plate," indicating that the current measurement is of the output connection piece of this type of protection device. The switch status is selected as "Closed (Closed)," indicating that the current circuit is in a closed state. -110.29 and -0.26 conform to the voltage range corresponding to "Upper -KM, Lower 0" in Table 1. The display shows "√" and "Pressure Plate Connection Piece Voltage Normal," indicating that the connection piece voltage measurement result is normal, there is no abnormal potential or grounding problem, and the switching conditions are met.

[0068] It should be noted that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0069] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing this application. Those skilled in the art will understand that the modules in the apparatus of the embodiment can be distributed within the apparatus of the embodiment as described, or can be modified to be located in one or more apparatuses different from this embodiment. The modules of the above-described embodiment can be combined into one module, or further divided into multiple sub-modules.

[0070] The serial numbers in this application are for descriptive purposes only and do not represent the superiority or inferiority of any particular implementation scenario. The above disclosures are merely a few specific implementation scenarios of this application; however, this application is not limited thereto, and any variations conceived by those skilled in the art should fall within the protection scope of this application.

Claims

1. A device for detecting abnormal ground potential of a connecting piece, characterized in that, The device comprises: a main body; a test connector detachably connected to the upper end and lower end of a connection piece to be tested, the test connector being used to synchronously measure the analog voltage signals of the upper end and lower end of the connection piece to be tested; a ground connector detachably connected to the ground end of a device to which the connection piece to be tested belongs; a main control chip arranged in the main body, the main control chip being provided with two test interfaces and a common ground interface, the two test interfaces being connected to the test connector through a cable respectively, the common ground interface being connected to the ground connector, the main control chip being used to determine abnormal ground information of the connection piece to be tested according to a comparison result of the upper end-to-ground potential and lower end-to-ground potential of the connection piece to be tested with a normal potential relationship, wherein the normal potential relationship is set based on the connection piece type and switch state of the connection piece to be tested; a touch display screen arranged on the surface of the main body and electrically connected to the main control chip, the touch display screen being used to receive a detection instruction and display the upper end-to-ground voltage value, lower end-to-ground voltage value and abnormal ground information.

2. The abnormality detection apparatus for the potential of the connecting piece according to claim 1, characterized by, The test connector comprises: a U-shaped shell, one side of the U-shaped shell facing the connection piece to be tested being provided with a concave surface matching the outer shape of the connection piece to be tested; two elastic probes arranged in the concave surface and corresponding to the connection holes on the connection piece to be tested; wherein, when the U-shaped shell is sleeved on the connection piece to be tested, the two elastic probes respectively contact the metal signal end of the connection piece to be tested by extending into the bottom of the connection hole.

3. The abnormal detection device for the ground potential of the connection piece according to claim 2, wherein: the elastic probe is configured as a telescopic structure; and / or one side of the U-shaped shell away from the connection piece to be tested is provided with a mark for marking the upper end and lower end of the connection piece to be tested.

4. The abnormality detection apparatus for the potential of the connecting piece according to claim 1, characterized by, The ground connector comprises a clamping piece and a magnetic line card, the magnetic line card having a containing groove; wherein, when the clamping piece is clamped on the ground end, the magnetic line card is used to adsorb the cable connected to the clamping piece to the surface of the device to which the connection piece to be tested belongs.

5. The abnormality detection apparatus for the potential of the bonding clip according to Claim 1, characterized by, The device further comprises: a lithium battery arranged in the main body and electrically connected to the main control chip, the lithium battery being provided with a charging input interface, the main control chip being further used to read the remaining power of the lithium battery and transmit the remaining power to the touch display screen for display.

6. The abnormality detection apparatus for the potential of the connecting piece according to Claim 1, characterized by, The device further comprises: an alarm buzzer arranged in the main body and electrically connected to the main control chip, the alarm buzzer being used to trigger an alarm prompt in response to an alarm instruction transmitted by the main control chip.

7. The abnormality detection apparatus for the potential of the bonding clip according to Claim 1, characterized by The device further comprises: a connector arranged on the side of the main body close to the device to which the connection piece to be tested belongs, the connector being used to fix the main body on the device to which the connection piece to be tested belongs; wherein, the connector comprises a buckle, a magnetic piece, a suction cup and a hook.

8. The abnormality detection apparatus for a connection piece to ground potential according to claim 1, characterized by, The main control chip comprises a control unit and two analog-to-digital converters. The two analog-to-digital converters are connected to the two test interfaces respectively, and the potential difference analog signal between the to-be-tested connecting piece and the ground terminal is converted into a digital signal and transmitted to the control unit.

9. An abnormality detection method applied to the abnormality detection device for the connection piece to ground potential according to any one of claims 1 to 8, characterized by, The method comprises: The touch display screen receives a detection instruction in response to an input operation and transmits the detection instruction to the master control chip, wherein the detection instruction comprises a connecting piece type and a switch state of the to-be-tested connecting piece; The master control chip collects an upper end-to-ground voltage value and a lower end-to-ground voltage value of the to-be-tested connecting piece in response to the detection instruction; The master control chip determines abnormal grounding information of the to-be-tested connecting piece according to a comparison result of the upper end-to-ground voltage value and the lower end-to-ground voltage value with a normal potential relationship; The master control chip sends the upper end-to-ground voltage value, the lower end-to-ground voltage value and the abnormal grounding information to the touch display screen, and the touch display screen displays the upper end-to-ground voltage value, the lower end-to-ground voltage value and the abnormal grounding information.

10. The abnormality detection method according to claim 9, characterized by, The master control chip determines abnormal grounding information of the to-be-tested connecting piece according to a comparison result of the upper end-to-ground voltage value and the lower end-to-ground voltage value with a normal potential relationship, comprising: When the connecting piece type is a tripping outlet connecting piece and the switch state is a closed position, if the upper end-to-ground voltage value is within a first bus voltage range and the lower end-to-ground voltage value is within a ground potential range, it is determined that the to-be-tested connecting piece can be tripped; otherwise, it is determined that the to-be-tested connecting piece cannot be tripped; When the connecting piece type is a tripping outlet connecting piece and the switch state is an open position, if the upper end-to-ground voltage value is greater than a second bus voltage range and the lower end-to-ground voltage value is within a ground potential range, it is determined that the to-be-tested connecting piece can be tripped; otherwise, it is determined that the to-be-tested connecting piece cannot be tripped; When the connecting piece type is a closing outlet connecting piece and the switch state is a closed position, if the upper end-to-ground voltage value is greater than a second bus voltage range and the lower end-to-ground voltage value is within a ground potential range, it is determined that the to-be-tested connecting piece can be tripped; otherwise, it is determined that the to-be-tested connecting piece cannot be tripped; When the connecting piece type is a closing outlet connecting piece and the switch state is an open position, if the upper end-to-ground voltage value is within a first bus voltage range and the lower end-to-ground voltage value is within a ground potential range, it is determined that the to-be-tested connecting piece can be tripped; otherwise, it is determined that the to-be-tested connecting piece cannot be tripped; When the connecting piece type is a switch outlet connecting piece of other protection interlocking, if the upper end-to-ground voltage value is greater than a second bus voltage range and the lower end-to-ground voltage value is within a ground potential range, it is determined that the to-be-tested connecting piece can be tripped; otherwise, it is determined that the to-be-tested connecting piece cannot be tripped. The first bus voltage range represents a positive-to-ground voltage of a control bus, and the second bus voltage range represents a negative-to-ground voltage of the control bus.

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