Isolation-supporting high-precision ground wire hanging and dismounting detection device and method

Abstract

The invention discloses a multi-physical-quantity fusion high-precision ground wire hanging and dismounting detection device and method supporting isolation, the device comprises a connecting hook and a detection device, the connecting hook comprises a grounding hole, a hook main body, a tongue-shaped clamp, an elastic contact and a microswitch, the tongue-shaped clamp is connected with the hook main body and the grounding hole in a conducting manner, and the elastic contact is connected with the elastic contact. During hooking, the microswitch is in contact with a wire to release residual voltage and then is clamped with the elastic contact to form a conductive grounding path, and the microswitch triggering device is awakened; the detection device comprises an isolation DCDC, an isolation ADC and a high-precision sampling resistor, and a voltage division loop is constructed to inversely calculate a contact resistor R1; the method comprises the following steps: setting a reference resistance network to execute measurement chain self-inspection; parameters such as clamping force / temperature are collected, dynamic self-calibration is carried out on a reliable conduction threshold R0, and low power consumption is achieved after acousto-optic prompt and wireless alarm are judged and output based on electricity-force-heat fusion. According to the invention, the safety, precision and traceability of grounding reliability determination under complex working conditions are improved.

Description

Technical Field

[0001] This invention belongs to the field of power system automation operation and maintenance technology, specifically relating to a device and method for detecting the disconnection and reconnection of isolated ground wires. Background Technology

[0002] In power transmission, distribution, and substation maintenance work, temporary grounding is an important measure to ensure personnel safety and prevent accidental energization or induced voltage injuries. Grounding hooks or grounding rods are key tools for temporary grounding, and their connection status and grounding reliability directly affect operational safety.

[0003] Currently, most temporary grounding hooks or grounding rods used at power transmission and distribution transformer sites are still purely metal mechanical components, lacking detection and warning functions. These tools typically rely on visual inspection and experience to perform connection and disconnection operations, making it impossible to assess the connection status or whether a reliable grounding has been established in real time and quantitatively. In complex working environments, with limited visibility, or due to personnel fatigue, human errors such as missed connections, incomplete connections, or inadequate clamping can easily occur, leading to potential safety risks.

[0004] To address these issues, existing technologies have attempted to install pressure sensors on grounding hooks to determine the grounding wire's attachment or detachment status by detecting pressure or force parameters. Compared to purely metal mechanical hooks, this approach offers some degree of status identification. However, this approach primarily detects whether clamping pressure is generated, making it difficult to reflect the electrical conductivity quality between the hook and the transmission line. Especially in long-term outdoor operation scenarios, the surface of the transmission line may develop an oxide layer due to wind, sun, moisture, and corrosion; or during maintenance, there may be residual dirt or rain / snow covering it. This can lead to situations where, even if the pressure meets the clamping requirements, the actual contact resistance may still be high, resulting in decreased conductivity. In such cases, although the hook may be "clamped," the grounding effect is unreliable and may still pose a safety hazard.

[0005] Therefore, existing technologies still lack a ground wire disconnection detection solution that can simultaneously identify disconnection status and quantify grounding reliability under high-voltage safety constraints, in order to adapt to complex outdoor working conditions and reduce reliance on personnel experience. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a device and method for detecting the hanging and detachment of isolated ground wires that can improve the safety, accuracy and traceability of grounding reliability determination under complex working conditions.

[0007] The technical solution of this invention is as follows: A high-precision grounding wire attachment / removal detection device for isolation includes a connecting hook and a grounding wire attachment / removal detection device electrically connected to the connecting hook. The connecting hook includes a grounding hole, a hook body, a first tongue-shaped clamp, a second tongue-shaped clamp, an elastic contact, and a micro switch. The grounding hole is located at the bottom of the hook body and connected to the ground via a grounding wire. One end of the first and second tongue-shaped clamps is connected to the inner top of the hook body, and the other end is connected to a high-voltage transmission line. The elastic contact is located at the top of the hook body and passes through the hook body, with one end connected to the high-voltage transmission line. In the unattached state, the elastic contact is insulated from the first and second tongue-shaped clamps and the hook body. In the attached state, the elastic contact, together with the first and second tongue-shaped clamps, clamps the high-voltage transmission line to form a conductive grounding path. The micro switch is located at the upper end of the elastic contact and connected to the hook body, and is used to output a wake-up signal during the hooking or unhooking action; the ground wire hooking / unhooking detection device includes a power module, a control unit, an audio-visual module, a wireless module, an isolated DC-DC module, an isolated ADC module, and a high-precision sampling resistor; the power module supplies power to the control unit, the audio-visual module, and the wireless module; after the micro switch triggers the wake-up action, the control unit controls the power module to supply power to the isolated DC-DC module to generate an isolation side voltage. The isolation side voltage is introduced through the elastic contact and forms a voltage divider circuit with the tongue clip one, the tongue clip two, and the high-precision sampling resistor; the isolated ADC module collects the voltage divider and sends it to the control unit through electrical isolation. The control unit uses this to complete the hooking / unhooking status identification and grounding reliability determination, and drives the audio-visual module to provide prompts and reports through the wireless module.

[0008] Furthermore, the signal terminal of the micro switch is electrically connected to the control unit, which is used to trigger the wake-up of the ground wire hanging / removal detection device and / or the hanging / removal status identification based on the on / off change of the micro switch during the hanging or removing action.

[0009] Furthermore, the grounding wire hanging / removal detection device also includes a clamping force detection module, which is disposed on the elastic contact and / or tongue-shaped clamp one and tongue-shaped clamp two, and is used to obtain clamping force parameters; the control unit is used to use the clamping force parameters and the contact resistance parameters calculated by the voltage divider circuit together for grounding reliability determination.

[0010] Furthermore, the grounding wire attachment / removal detection device also includes a temperature detection module, which is located in the contact area of ​​the elastic contact and / or tongue-type clamp one and tongue-type clamp two adjacent to the high-voltage transmission line, for acquiring contact temperature parameters; the control unit is used to combine the contact temperature parameters with the contact resistance parameters for grounding reliability determination. Even further, the reference resistor network includes at least two reference resistors with different resistance values ​​to cover at least two measurement intervals of the isolation sampling chain.

[0011] Furthermore, the ground wire disconnection detection device also includes a reference resistor network and a controlled switching switch. The reference resistor network is electrically connected to the isolated ADC module. After the microswitch triggers and wakes up, the control unit controls the controlled switching switch to switch to the reference resistor network path to perform self-testing on the measurement chain consisting of the isolated DC-DC module, the isolated ADC module, and the high-precision sampling resistor.

[0012] Furthermore, the reference resistor network includes at least two reference resistors with different resistance values ​​to cover at least two measurement intervals of the measurement chain.

[0013] Furthermore, the control unit is used to dynamically self-calibrate the grounding resistance threshold for reliable grounding conduction. The basis for the dynamic self-calibration includes at least ambient temperature, conductor type parameters, clamping force parameters, historical reliable connection baselines, and / or the self-test results of the measurement chain.

[0014] Furthermore, when the measurement chain fails the self-test, the control unit drives the audio-visual module to output an abnormal prompt and reports the self-test failure information through the wireless module, and prohibits the output of a reliable connection conclusion; after the connection or removal status identification and information reporting are completed, the control unit controls the ground wire connection / removal detection device to enter a low-power state, and is awakened by the micro switch.

[0015] A ground wire connection / removal detection method, implemented using the aforementioned device, includes the following steps: S1, when the ground wire is connected or removed, a micro switch triggers and wakes up the ground wire connection / removal detection device; S2, the isolation power supply is activated and a measurement chain self-test is performed; S3, when the self-test passes, a voltage divider signal is collected to determine the contact resistance parameter, and clamping force parameter and / or contact temperature parameter is collected; S4, based on the clamping force parameter and / or contact temperature parameter, conductor type parameter, and historical reliable connection baseline, the ground wire reliable conduction grounding resistance threshold is dynamically self-calibrated; S5, based on the contact resistance parameter, clamping force parameter, and / or contact temperature parameter, a fusion reliability judgment is performed, and an audible and visual prompt and wireless information are output; wherein, during the connection process, the high-voltage transmission conductor first contacts the first and second tongue-type clamps and discharges the residual electricity to the ground, and then the first and second tongue-type clamps are clamped with the elastic contact to form a conductive grounding path.

[0016] Furthermore, when the measurement chain fails the self-test, an abnormal audio-visual prompt is output and the self-test failure information is reported, and the output of a reliable connection conclusion is prohibited.

[0017] The beneficial effects of this invention are: 1. Significantly improved safety: The structure and action sequence of "tongue-shaped clamp first contacts and releases residual pressure through the grounding hole, and then the elastic contact clamps and conducts the circuit" effectively reduces the risk of residual pressure to personnel and detection circuits at the moment of connection, and improves the safety boundary of high-voltage field operations.

[0018] 2. Improved detection accuracy and reliability: By constructing an isolated measurement chain using isolated DC-DC converters, isolated ADCs, and high-precision sampling resistors, high-precision calculation of the contact resistance between the hook and the wire is achieved, avoiding misjudgments caused by relying solely on "whether it is clamped" or a single state signal.

[0019] 3. Enhanced adaptability to complex working conditions: By introducing physical quantities such as clamping force and contact temperature, and combining them with contact resistance for electro-mechanical-thermal fusion judgment, it can effectively address scenarios where "clamping exists but conduction is unreliable" caused by conductor oxidation, residual dirt, rain and snow, thereby improving the robustness of judgment in complex outdoor environments.

[0020] 4. The grounding resistance threshold for reliable grounding is more in line with engineering practice: The grounding resistance threshold R0 for reliable grounding is dynamically self-calibrated, taking into account ambient temperature, conductor type / diameter parameters, clamping status and historical reliable baseline, so that the threshold adapts to the working conditions and life status, improving the consistency of judgment under different lines, different seasons and different equipment conditions.

[0021] 5. Measurement results can be self-verified: The measurement chain self-test is implemented by setting up a reference resistor network, which can predict and intercept the stability of isolated power supply, sampling chain drift, and ADC zero drift / range abnormality. When the self-test fails, the output of reliable connection conclusions is prohibited, which significantly reduces the risk of false alarms / missed alarms.

[0022] 6. Balancing low power consumption and ease of use: The device utilizes a microswitch to trigger wake-up during the hanging / removal process, enabling it to maintain low power consumption in non-operating states, extending battery life, reducing maintenance frequency, and making it suitable for long-term field deployment.

[0023] 7. Enhanced Traceability and Maintenance Value: The combination of audible and visual alerts with wireless synchronous reporting can generate records of hanging / removing and reliability assessments, providing data support for compliance management, fault review, and preventative maintenance.

[0024] In summary, this invention, through a closed-loop design of "structural safety sequence + isolation precision measurement + self-test calibration + multi-physical quantity fusion," achieves a safer, more accurate, and more stable engineering judgment on the reliability of grounding wire connection / removal and grounding, and has good application value. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the connecting hook structure of the present invention.

[0026] Figure 2This is a schematic diagram of the ground wire hanging and removing device of the present invention.

[0027] Figure 3 This is the equivalent circuit diagram of the isolated sampling of the present invention.

[0028] In the diagram: 1-grounding hole, 2-hook body, 3-tongue clip one, 4-tongue clip two, 5-elastic contact, 6-micro switch. Detailed Implementation

[0029] The following description, in conjunction with the connecting hook structure, isolation measurement circuit, and reliability determination algorithm, further illustrates the embodiments of the present invention. It should be understood that these embodiments are merely for explaining the technical concept of the present invention and do not constitute a limitation on the scope of protection. Those skilled in the art can make equivalent substitutions for sensor type, details of grounding resistance threshold generation for reliable grounding wire conduction, communication methods, etc., without departing from the spirit of the present invention.

[0030] Example 1: As Figure 1 As shown, the connection hook of the high-precision grounding wire hanging and removing detection device of the present invention preferably includes: a grounding hole 1, a hook body 2, a tongue-shaped clamp 3, a tongue-shaped clamp 4, an elastic contact 5, and a micro switch 6. The tongue-shaped clamp 3 and the tongue-shaped clamp 4 are conductive components, respectively connected to the hook body 2 and the grounding hole 1. The grounding hole 1 is located at the bottom of the hook body 2 and reliably connected to the ground through a grounding wire. The elastic contact 5 is a movable conductive clamp, located at the top of the hook body 2 and passing through it. A micro switch 6 is located at its upper end, and the micro switch 6 is connected to the hook body 2 through a mounting base. In the unattached state, the elastic contact 5 remains insulated from the tongue-shaped clamp 3, the tongue-shaped clamp 4, and the hook body 2. When the hanging operation is performed, the transmission line first enters the guiding area formed by the tongue-shaped clamp 3 and the tongue-shaped clamp 4, preferentially connecting with... When the first tongue-shaped clamp 3 and the second tongue-shaped clamp 4 come into contact, the residual voltage of the conductor is rapidly discharged along the path of "conductor - tongue-shaped clamp - hook body - grounding hole - grounding conductor - earth". Subsequently, the conductor continues to be pressed in and pushes the elastic contact 5 to displace. The elastic contact 5 forms a double-sided clamping structure with the first tongue-shaped clamp 3 and the second tongue-shaped clamp 4, thereby establishing a stable conductive grounding path. At the same time, the displacement of the elastic contact 5 drives the micro switch 6 to operate and output a wake-up signal. When the dismantling operation is performed, the conductor gradually separates from the elastic contact 5 and the first tongue-shaped clamp 3 and the second tongue-shaped clamp 4. The elastic contact 5 resets, and the state of the micro switch 6 changes, serving as a dismantling trigger signal for subsequent identification and reporting. Through the above structure and action sequence, the present invention realizes the safety pre-condition logic of "discharging residual voltage first, then clamping and detecting", providing necessary protection for high-precision measurement under subsequent isolation conditions.

[0031] Example 2: As Figure 2-3As shown, this embodiment, based on the connection hook structure described in Embodiment 1, further illustrates the connection method of each functional module of the ground wire hook-and-drop detection device and the circuit configuration for achieving high-precision detection of contact resistance under isolation conditions. The ground wire hook-and-drop detection device includes a power module, a control unit, an audible and visual module, a wireless module, an isolated DC-DC module, an isolated ADC module, and a high-precision sampling resistor. The power module is preferably a combination of a battery and a power management circuit, used to provide basic operating power for the control unit, the audible and visual module, and the wireless module. The control unit is electrically connected to the audible and visual module and the wireless module respectively, used to output prompt control signals and send hook-and-drop status and grounding reliability judgment information. The input terminal of the isolated DC-DC module is controlled to be connected to the power module, and its output terminal forms the isolation side power supply voltage. The microswitch 6 is electrically connected to the isolation side reference ground; when the connecting hook is engaged or disengaged, the elastic contact 5 displaces, triggering the microswitch 6 to output a wake-up signal. The control unit then controls the power module to supply power to the isolated DC-DC module, enabling the isolated DC-DC module to generate a stable isolation side voltage. In the isolated measurement link, the elastic contact 5 is electrically connected to the isolation side voltage terminal of the isolated DC-DC module; the tongue clip 3 and the tongue clip 4 are connected to the high-precision sampling resistor. Electrical connection; when the high-voltage transmission line is clamped together by tongue-type clamp 3, tongue-type clamp 4 and elastic contact 5, an equivalent contact resistance is formed between the elastic contact 5 and the tongue-type clamps through the conductor. The equivalent contact resistance With high-precision sampling resistor Together, they form a voltage divider circuit; the sampling input terminal of the isolated ADC module is connected to a preset voltage divider node of the voltage divider circuit to acquire the voltage of the voltage divider node. The signal is converted into a digital signal; this digital signal is transmitted to the control unit via electrical isolation. The control unit calculates the contact resistance parameters between the hook and the transmission line based on the voltage divider sampling information uploaded by the isolation ADC module, the isolation side voltage, and the calibration parameters of the high-precision sampling resistor. It then combines this with the hooking / removal trigger logic to identify the hooking / removal status and determine grounding reliability. When the determination result indicates reliable hooking or an abnormal risk, the control unit drives the audio-visual module to output a corresponding prompt and reports it to the backend via the wireless module. After completing the prompt and reporting, the control unit enters a low-power state, waiting for the next activation by the microswitch 6. The wake-up process is described above. The low-power state refers to the state where the control unit enters a sleep / standby mode after completing status recognition and information output, and shuts down or puts the isolated DC-DC, isolated ADC, wireless module and audio-visual module into sleep mode, retaining only the wake-up path triggered by micro switch 6, so as to reduce the overall power consumption during non-operation phases. Through the above connection and operation mode, this embodiment realizes a closed-loop detection process of "micro-motion triggering - isolated power supply - voltage divider sampling - isolated transmission - control judgment - audio-visual / wireless output - low power fall-off", while ensuring electrical safety isolation between the measurement chain and the control chain in high-voltage scenarios.

[0032] Example 3: To improve the reliability of the measurement results, a reference resistor network is installed inside the ground wire attachment / removal detection device. and controlled switching The reference resistor network preferably includes at least two different resistance values ​​to cover the low-resistance and medium-resistance measurement ranges of the isolated sampling chain. After being triggered and woken up by the microswitch, the control unit first starts the isolated DC-DC module. After the power supply stabilizes, the control unit controls the switches sequentially. Entering each reference resistor path, the isolated ADC module acquires the reference measurement voltage respectively. The control unit calculates the theoretical reference voltage based on this. With relative error And perform a consistency check; the self-check algorithm expression is as follows: , , When the following conditions are met: If the self-test of the measurement chain is successful, it is determined that the measurement chain has passed; otherwise, it is determined that the measurement chain is abnormal. in, To isolate the power supply voltage on the isolation side of the DC-DC output, For high-precision sampling resistors, For the first Reference resistor, To isolate the ADC measured reference voltage, The theoretical reference voltage, This is a relative error. This is the allowable error threshold; When the self-test fails, the control unit outputs an abnormal audible and visual warning and reports the self-test failure information via the wireless module, while prohibiting the output of a reliable connection conclusion; when the self-test passes, the detection device enters the actual connection measurement process.

[0033] Example 4: After the measurement chain self-test passes, the control unit switches to the actual hook circuit and collects the voltage of the voltage divider node. In this embodiment, the contact resistance is calculated using the following voltage divider model: , , in, The equivalent contact resistance between the connection hook and the transmission line is used to determine the connection method. For high-precision sampling resistors, To isolate the voltage at the voltage divider node acquired by the ADC, Provides the power supply voltage to the isolation side.

[0034] Example 5: To achieve reliability determination through multi-physical quantity fusion, this invention further collects clamping force and contact temperature parameters. A force / strain sensor is installed in the force-bearing area of ​​the elastic arm or tongue-shaped clamp of the elastic contact 5, and the output voltage is... After factory calibration, the clamping force can be calculated using a linear model: , in, For clamping force parameters, For the real-time output voltage of the force / strain sensor, Zero-load calibration voltage, For force-voltage calibration coefficient; A temperature sensor is placed near the contact surface of the elastic contact, and its output voltage is... After calibration, the temperature is converted according to the following model: , in, For contact temperature or adjacent temperature parameters, For reference temperature, This is the temperature-voltage calibration factor. The temperature sensor outputs voltage in real time. Calibrate the voltage at the reference temperature point; If the temperature element is a nonlinear device such as an NTC, equivalent conversion can be achieved by piecewise linear conversion or table lookup.

[0035] Example 6: To enhance the consistency of judgment under different operating conditions, the grounding resistance threshold for reliable grounding wire conduction is extended from a fixed value to a dynamic self-calibration threshold. The control unit acquires temperature parameters during each detection cycle. Conductor category parameters Clamping force And read the device's historical reliable connection samples Based on the statistical baseline, the preferred threshold generation model is as follows: Basic threshold for wire type: , Temperature compensation: , Clamping force correction: , , Historical baseline: , The dynamic threshold is obtained by combining the results: , in, For conductor category parameters, This represents the mapping relationship between conductor type and basic threshold. This is the reliable conduction baseline threshold after temperature compensation. This is the temperature compensation coefficient. For reference temperature, For the rated clamping force, To simultaneously consider the reliable conduction threshold after temperature and clamping force correction, The clamping force affects the weight. The contact resistance baseline for historically reliable connection samples. Let N be the set of historically reliable connection samples, and N be the number of historical samples. The threshold fusion coefficient is... This is the dynamic reliable conduction threshold after self-calibration; When conductor category parameters are missing or historical samples are insufficient, the control unit can degenerate to use thresholds with only temperature compensation or only force-temperature correction to ensure the feasibility of the algorithm in field deployment.

[0036] Example 7: The control unit acquires... , , as well as The subsequent fusion determination is performed, and two preferred implementation methods are provided: 1. Rule Determination: , in, and These are the clamping force parameters. The upper and lower limits of the effective interval. To allow an upper limit of temperature, when If the contact is not secure enough by the elastic contact and the tongue-shaped clamp, it indicates that the wire is not being held firmly enough, which may lead to unstable contact, high contact resistance, or loosening due to vibration. Therefore, it is judged as an unreliable connection or a message indicating "insufficient clamping, reconnection required" is displayed. If the clamping is too tight, it indicates that the clamping may cause abnormal deformation of the contacts, damage to the surface of the wires, or stress on the device structure. Therefore, it can be judged as abnormal clamping and an inspection should be prompted. 2. Weighted scoring: Normalizer reliability: , , , Overall rating: , Judgment conditions: , in, This is a normalized reliability index based on resistance, used to characterize the degree to which contact resistance meets dynamic threshold requirements, with a value range of [value range missing]. A higher value indicates more reliable electrical conduction; This is a normalized reliability index for the clamping force dimension, used to characterize the degree to which the current clamping force satisfies the rated clamping force. Its value range is [value range missing]. A larger value indicates a more reliable clamping state. This is a normalized reliability index based on temperature, used to characterize the degree to which the contact temperature remains within a safe / reasonable range, with a value range of [value missing]. The higher the value, the closer the temperature is to the safe working area; This is the temperature normalized span parameter, used to... relatively The deviation is mapped to The scale factor of the interval; the larger the span, the greater the temperature deviation. The more lenient the punishment; For comprehensive reliability scoring, it is used as an overall index that integrates three sub-reliability categories: resistance, clamping force, and temperature. This is the resistance reliability weighting coefficient, reflecting the degree of influence of electrical conduction quality on the overall judgment; This is the clamping force reliability weighting coefficient, reflecting the degree of influence of the mechanical clamping state on the comprehensive judgment; This is the temperature reliability weighting coefficient, reflecting the degree of influence of thermal state / abnormal heating risk on the overall judgment; The threshold for comprehensive scoring is when When it is determined to be a reliable connection, when It is determined to be unreliable or require verification at that time; To improve operational availability, the control unit can output a reason prompt based on the determined path: when and When insufficient clamping is detected; and Normally, this indicates that the surface of the wire may be oxidized or affected by dirt, rain, or snow.

[0037] Example 8: In actual operation, the typical closed-loop process of this invention is as follows: First, the wire enters the connecting hook and contacts the tongue-shaped clamp, and the residual electricity is discharged to the ground; then, the elastic contact 5 displaces and triggers the micro switch 6, the control unit is awakened and starts the isolated power supply; the control unit first performs a self-test of the reference resistor network. If the self-test fails, an abnormal prompt is output and information is reported, ending the reliability output; if the self-test passes, data is collected. Back-calculate contact resistance Simultaneously, clamping force and temperature parameters are collected; the control unit generates data based on wire type, temperature, clamping force, and historical reliable baselines. The reliability conclusion is then given by rule-based judgment or comprehensive scoring method; finally, after the device completes the audible and visual prompts and wireless information reporting, it enters a low-power state and waits for the next hanging and detaching trigger.

[0038] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A device for detecting the attachment and removal of isolated high-precision ground wires, characterized in that, The device includes a connecting hook and a grounding wire disconnection detection device electrically connected to the connecting hook. The connecting hook includes a grounding hole (1), a hook body (2), a tongue-shaped clamp one (3), a tongue-shaped clamp two (4), an elastic contact (5), and a micro switch (6). The grounding hole (1) is located at the bottom of the hook body (2) and connected to the ground through a grounding wire. One end of the tongue-shaped clamp one (3) and the tongue-shaped clamp two (4) are connected to the inner top of the hook body (2), and the other end of the tongue-shaped clamp one (3) and the tongue-shaped clamp two (4) are connected to the high-voltage transmission line. The elastic contact (5) is located at the top of the hook body (2) and passes through the hook body (2). One end of the elastic contact (5) is connected to the high-voltage transmission line. In the unconnected state, the elastic contact (5) is insulated from the tongue-shaped clamp one (3), the tongue-shaped clamp two (4), and the hook body (2). In the connected state, the elastic contact (5) is connected to the tongue-shaped clamp one (3) and the tongue-shaped clamp two (4). The high-voltage transmission line is clamped to form a conductive grounding path; the micro switch (6) is set on the upper end of the elastic contact (5) and connected to the hook body (2) for outputting a wake-up signal during the hanging or dismantling action; the ground wire hanging and dismantling detection device includes a power module, a control unit, an audio-visual module, a wireless module, an isolated DC-DC module, an isolated ADC module and a high-precision sampling resistor; the power module supplies power to the control unit, the audio-visual module and the wireless module; after the micro switch triggers the wake-up, the control unit controls the power module to supply power to the isolated DC-DC module to generate an isolation side voltage, the isolation side voltage is introduced through the elastic contact (5) and forms a voltage divider circuit with the tongue clip one (3) and the tongue clip two (4) and the high-precision sampling resistor; the isolated ADC module collects the voltage divider and sends it to the control unit through electrical isolation, the control unit completes the hanging and dismantling status identification and grounding reliability determination based on this, and drives the audio-visual module to prompt and report through the wireless module.

2. The apparatus according to claim 1, characterized in that, The signal terminal of the micro switch (6) is electrically connected to the control unit. The control unit is used to trigger the wake-up of the ground wire hanging / removal detection device and / or the hanging / removal status identification based on the on / off change of the micro switch (6) during the hanging or removing action.

3. The apparatus according to claim 1, characterized in that, The grounding wire hanging and removing detection device also includes a clamping force detection module, which is set on the elastic contact (5) and / or tongue clip one (3) and tongue clip two (4) to obtain clamping force parameters; the control unit is used to use the clamping force parameters and the contact resistance parameters calculated by the voltage divider circuit together for grounding reliability determination.

4. The apparatus according to claim 1, characterized in that, The grounding wire hanging and removing detection device also includes a temperature detection module, which is set in the contact area of ​​the elastic contact (5) and / or the first tongue clip (3) and the second tongue clip (4) near the high-voltage transmission line, and is used to obtain contact temperature parameters; the control unit is used to use the contact temperature parameters and contact resistance parameters together for grounding reliability determination.

5. The apparatus according to claim 1, characterized in that, The ground wire hanging and detachment detection device also includes a reference resistor network and a controlled switching switch. The reference resistor network is electrically connected to the isolated ADC module. After the micro switch (6) triggers and wakes up, the control unit controls the controlled switching switch to switch to the reference resistor network path to perform self-test on the measurement chain consisting of the isolated DC-DC module, the isolated ADC module and the high-precision sampling resistor.

6. The apparatus according to claim 5, characterized in that, The reference resistor network includes at least two reference resistors with different resistance values ​​to cover at least two measurement intervals of the measurement chain.

7. The apparatus according to claim 1, characterized in that, The control unit is used to dynamically self-calibrate the grounding resistance threshold for reliable grounding wire conduction. The basis for the dynamic self-calibration includes at least ambient temperature, conductor type parameters, clamping force parameters, historical reliable connection baselines, and / or the self-test results of the measurement chain.

8. The device for detecting the attachment and removal of isolated high-precision ground wires according to claim 5, characterized in that, When the measurement chain fails the self-test, the control unit drives the audio-visual module to output an abnormal prompt and reports the self-test failure information through the wireless module, and prohibits the output of a reliable connection conclusion; after the connection or removal status identification and information reporting are completed, the control unit controls the ground wire connection / removal detection device to enter a low power consumption state, and is triggered to wake up by the micro switch (6).

9. A method for detecting grounding wire disconnection, characterized in that, The device described in any one of claims 1-7 is used to implement the following steps: S1, when the ground wire is connected or disconnected, the micro switch (6) triggers and wakes up the ground wire connection / disconnection detection device; S2, the isolation power supply is started and the measurement chain self-test is performed; S3, when the self-test is passed, the voltage divider signal is collected to determine the contact resistance parameter, and the clamping force parameter and / or contact temperature parameter is collected; S4, the ground wire reliable conduction grounding resistance threshold is dynamically self-calibrated based on the clamping force parameter and / or contact temperature parameter, the conductor type parameter and the historical reliable connection baseline; S5, the reliability is determined by fusion based on the contact resistance parameter and the clamping force parameter and / or contact temperature parameter and the audio-visual prompt and wireless information are output; wherein, during the connection process, the high voltage transmission conductor first contacts the tongue clip one (3) and the tongue clip two (4) and discharges the residual electricity to the ground, and then the tongue clip one (3) and the tongue clip two (4) are clamped by the elastic contact (5) to form a conduction grounding path.

10. The method according to claim 9, characterized in that, When the measurement chain fails the self-test, it outputs an abnormal audio-visual prompt and reports the self-test failure information, and prohibits the output of a reliable connection conclusion.

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