A portable line earth fault monitoring device

Abstract

This utility model discloses a portable line grounding fault monitoring device, which includes a signal acquisition unit, a signal processing module, an environmental adaptation unit, a display control unit, a storage module, an alarm prompting module, and a power management unit. The signal acquisition unit acquires line signals through high-frequency, low-frequency, and DC signal detection modules, and combines this with the environmental adaptation unit to compensate for environmental parameters, improving detection accuracy. The display control unit displays fault information and environmental data in real time. The alarm prompting module alerts the user through sound, light, and vibration. The power management unit employs a lithium battery pack and power monitoring design to ensure stable battery life. This application improves detection efficiency and portability, meets the needs of rapid on-site detection, and enhances the device's durability and environmental adaptability.

Description

Technical Field

[0001] This utility model relates to the field of power system monitoring and fault diagnosis, and in particular to a portable line grounding fault monitoring device. Background Technology

[0002] To improve the stability and safety of power line operation, timely detection of line grounding faults is crucial. However, current line grounding fault monitoring equipment is typically bulky and inconvenient to carry, making it difficult to meet the needs of rapid on-site detection. Furthermore, existing equipment may be limited by environmental factors in practical applications, leading to reduced detection efficiency or insufficient data accuracy. In addition, the high operational complexity of some devices places high demands on the technical skills of users, thus hindering their widespread application. To address these issues, we propose a portable line grounding fault monitoring device. Utility Model Content

[0003] The purpose of this utility model is to provide a portable line grounding fault monitoring device, which solves the problems mentioned in the background art.

[0004] This invention is implemented as follows: a portable line grounding fault monitoring device includes a signal acquisition unit, a signal processing module, an environmental adaptation unit, a display control unit, a storage module, an alarm prompting module, and a power management unit. The signal acquisition unit collects grounding fault signals from power lines and transmits the collected signals to the signal processing module for analysis and processing. The signal processing module filters, amplifies, and digitizes the collected signals before transmitting the processed data to the storage module for storage. The storage module compares the stored data with preset values ​​and transmits the comparison results to the display control unit and the alarm prompting module. The power management unit provides power to the entire device and monitors the power status in real time.

[0005] Furthermore, a portable line grounding fault monitoring device also includes an environmental adaptation unit. This unit collects environmental parameters using temperature and humidity sensors and transmits these parameters to a signal processing module for compensation calculations, thereby reducing the impact of environmental factors on signal acquisition accuracy. The environmental adaptation unit is mounted on the top of the device housing and fixed to the main body via a threaded connection, facilitating disassembly and replacement.

[0006] Furthermore, the signal acquisition unit includes a high-frequency signal detection module, a low-frequency signal detection module, and a DC signal detection module. These modules are used to acquire high-frequency interference signals, low-frequency fluctuation signals, and DC offset signals from the power line, respectively, and transmit the acquired signals to the signal processing module for processing via wires. The high-frequency signal detection module employs a magnetic ring sensor structure, with an external shielding layer fixed inside the device housing by clips. The low-frequency signal detection module and the DC signal detection module use a differential input circuit design, with their input terminals connected to the input interface of the signal processing module via soldering.

[0007] Furthermore, the display control unit includes an LCD screen and a button control panel. The LCD screen is connected to the signal processing module via a flexible ribbon cable and is used to display relevant information and environmental parameters related to grounding faults. The button control panel is fixed to the front of the device housing with screws, and its output terminal is connected to the input terminal of the signal processing module via a wire to receive user input operation commands.

[0008] Furthermore, the alarm prompt module includes an audible and visual alarm unit and a vibration prompt unit. The audible and visual alarm unit consists of a buzzer and an LED light. The buzzer is fixed inside the device housing with bolts, and the LED light is embedded in the side of the device housing. Both are connected to the output terminal of the signal processing module through wires. The vibration prompt unit is driven by a micro motor, which is fixed inside the device housing by adhesive. Its power input terminal is connected to the power management unit through wires.

[0009] Furthermore, the power management unit includes a lithium battery pack, a charging management chip, and a power monitoring chip. The lithium battery pack is fixed to the bottom of the device housing via a slot, and its positive and negative terminals are connected to the input terminal of the charging management chip via wires. The charging management chip is connected to the power supply terminal of the signal processing module by soldering to provide a stable power supply for the entire device. The power monitoring chip communicates with the signal processing module via an I2C bus to monitor the remaining power of the lithium battery pack in real time and transmits the monitoring data to the display control unit for display.

[0010] Furthermore, the signal processing module processes the acquired signals in the following order: high-frequency signal detection module, low-frequency signal detection module, and DC signal detection module. By processing the three types of signals step by step, the accuracy of signal analysis is ensured.

[0011] Furthermore, the storage module employs a non-volatile memory chip, which is connected to the signal processing module via an SPI bus to store historical data of grounding faults and environmental parameter records. The storage module also has a data export interface, which is connected to the output of the memory chip via soldering, allowing users to read the stored data through external devices.

[0012] Furthermore, the outer shell of the device is made of high-strength engineering plastic and its surface is coated with a waterproof coating to improve the waterproof performance of the device; a foldable bracket is provided on the back of the outer shell of the device, the bracket is connected to the shell through a rotating shaft, and a damping washer is embedded in the rotating shaft to adjust the angle of the bracket and keep it in a fixed position.

[0013] Compared with existing technologies, the advantages of this utility model are as follows: This utility model provides a portable line grounding fault monitoring device. It collects multiple signals from power lines through a high-frequency signal detection module, a low-frequency signal detection module, and a DC signal detection module, and combines this with an environmental adaptation unit to compensate for environmental parameters, improving the accuracy and reliability of signal acquisition. The display control unit displays grounding fault information and environmental parameters in real time, allowing users to quickly understand the line's operating status. The alarm module's audible and visual alarms and vibration alerts promptly remind users when a fault occurs. The power management unit's lithium battery pack and power monitoring chip design extend the device's battery life and enable real-time monitoring of power status, preventing detection interruptions due to insufficient power. Furthermore, the device's casing is made of high-strength engineering plastic with a waterproof coating, enhancing its durability and environmental adaptability. The foldable bracket design makes the device more flexible and convenient to use, meeting the needs of rapid on-site detection. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall system structure of this utility model;

[0015] Figure 2 This is a block diagram of the internal structure of the signal acquisition unit of this utility model;

[0016] Figure 3 This is a block diagram of the internal structure of the environmental adaptation unit of this utility model;

[0017] Figure 4 This is a block diagram of the internal structure of the display control unit of this utility model;

[0018] Figure 5 This is a block diagram of the internal structure of the alarm notification module of this utility model;

[0019] Figure 6 This is a block diagram of the internal structure of the power management unit of this utility model.

[0020] The attached diagram is labeled as follows: 1. Signal acquisition unit; 2. Signal processing module; 3. Environmental adaptation unit; 4. Display control unit; 5. Storage module; 6. Alarm prompt module; 7. Power management unit; 8. High-frequency signal detection module; 9. Low-frequency signal detection module; 10. DC signal detection module. Detailed Implementation

[0021] This utility model provides a portable line grounding fault monitoring device, the structure and function of which are achieved through the coordinated cooperation of multiple modules. The following description, in conjunction with the appendix... Figure 1 and attached Figure 2 The specific embodiments of this utility model will be described in detail below. Figure 1 The image shows the overall appearance of the device and the layout of its main functional modules. The positions of the signal acquisition unit 1, signal processing module 2, environmental adaptation unit 3, display control unit 4, storage module 5, alarm prompt module 6, and power management unit 7 are clearly visible. Figure 2 This further illustrates the connection relationships between the modules and their interaction methods with external interfaces.

[0022] The signal acquisition unit 1 is one of the core components of this device, comprising a high-frequency signal detection module 8, a low-frequency signal detection module 9, and a DC signal detection module 10. The high-frequency signal detection module 8 uses a magnetic ring sensor structure, externally wrapped with a shielding layer, which is fixed inside the device housing by clips to reduce external electromagnetic interference. Both the low-frequency signal detection module 9 and the DC signal detection module 10 employ differential input circuit designs, with their input terminals connected to the input interface of the signal processing module 2 via soldering. These three modules are used to acquire high-frequency interference signals, low-frequency fluctuation signals, and DC offset signals from the power line, respectively, and transmit these signals to the signal processing module 2 via wires for further processing. The signal acquisition unit 1 is installed at the front of the device housing, near the top of the device, for easy connection to the power line.

[0023] The signal processing module 2 is located in the central area of ​​the device housing. It is connected to the display control unit 4 via a flexible ribbon cable and electrically connected to the storage module 5 and the alarm module 6 via solder joints. The signal processing module 2 first filters the signal received from the high-frequency signal detection module 8, and then amplifies and digitizes the signals from the low-frequency signal detection module 9 and the DC signal detection module 10 in sequence. The processed data is transmitted to the storage module 5 for storage via the SPI bus, while the analysis results are simultaneously transmitted to the display control unit 4 and the alarm module 6. The core chip of the signal processing module 2 is a high-performance microcontroller, capable of synchronous processing of multi-channel signals, ensuring the accuracy and real-time performance of signal analysis.

[0024] The environmental adaptation unit 3 is mounted on the top of the device housing and fixed to the main body of the device via a threaded connection. The environmental adaptation unit 3 incorporates temperature and humidity sensors to collect ambient temperature and humidity parameters. These parameters are transmitted to the signal processing module 2 via wires. The signal processing module 2 performs compensation calculations on the collected power line signals based on the received environmental parameters, thereby reducing the impact of environmental factors on signal acquisition accuracy. The detachable design of the environmental adaptation unit 3 facilitates user replacement or maintenance of the sensor components, and its housing surface is coated with a waterproof coating to enhance durability.

[0025] The display control unit 4 includes an LCD screen and a button control panel, both fixed to the front of the device housing with screws. The LCD screen is connected to the signal processing module 2 via a flexible ribbon cable, used to display real-time information related to grounding faults and environmental parameters. The output of the button control panel is connected to the input of the signal processing module 2 via wires, used to receive user operation commands. The design of the display control unit 4 emphasizes human-machine interaction; the LCD screen uses a high-resolution screen to ensure clear and legible data display, while the button control panel is made of a non-slip material for easy operation in the field.

[0026] The alarm module 6 consists of an audible and visual alarm unit and a vibration alert unit. The audible and visual alarm unit includes a buzzer and an LED light. The buzzer is bolted inside the device housing, and the LED light is embedded in the side of the housing. Both are connected to the output of the signal processing module 2 via wires. When the signal processing module 2 detects a grounding fault, the buzzer emits a warning sound, and the LED light flashes to alert the user. The vibration alert unit is driven by a miniature motor, which is glued inside the device housing. Its power input is connected to the power management unit 7 via wires. The vibration alert unit provides additional tactile feedback to the user in noisy environments, enhancing the alarm effect.

[0027] The power management unit 7 is located at the bottom of the device housing. Its core components include a lithium battery pack, a charging management chip, and a power monitoring chip. The lithium battery pack is fixed inside the device housing via a slot, and its positive and negative terminals are connected to the input terminals of the charging management chip via wires. The charging management chip is connected to the power supply terminal of the signal processing module 2 by soldering, providing a stable power supply for the entire device. The power monitoring chip communicates with the signal processing module 2 via an I2C bus, monitors the remaining power of the lithium battery pack in real time, and transmits the monitoring data to the display control unit 4 for display. The design of the power management unit 7 balances battery life and safety. A high-capacity lithium battery pack is selected, and the charging management chip has overcharge protection and short-circuit protection functions to ensure the stability and reliability of the device during long-term use.

[0028] Storage module 5 employs a non-volatile memory chip and is connected to signal processing module 2 via an SPI bus. It stores historical data on grounding faults and environmental parameter records. Storage module 5 also features a data export interface, which is soldered to the output of the memory chip, allowing users to easily access the stored data via external devices. The capacity design of storage module 5 fully considers the needs of practical applications, capable of storing at least one month's worth of operational data to meet users' requirements for historical data traceability.

[0029] The device's outer casing is made of high-strength engineering plastic, with a waterproof coating to enhance its waterproof performance. A foldable bracket is located on the back of the casing, connected to the casing via a rotating shaft. The rotating shaft contains damping washers for adjusting the bracket's angle and maintaining its fixed position. This foldable bracket design makes the device more flexible and convenient to use; users can adjust the device's tilt angle as needed to better view the information on the LCD screen.

[0030] In practical applications, this device first acquires various signals from the power line through the signal acquisition unit 1, including high-frequency interference signals, low-frequency fluctuation signals, and DC offset signals. These signals are then filtered, amplified, and digitized by the signal processing module 2 before being transmitted to the storage module 5 for storage. Simultaneously, the signal processing module 2 compares the processed data with preset values. If an anomaly is detected, the alarm prompt module 6 is triggered to issue an audible and visual alarm and a vibration alert. Meanwhile, the environmental adaptation unit 3 acquires environmental parameters in real time and transmits them to the signal processing module 2. The signal processing module 2 performs compensation calculations on the acquired signals based on the environmental parameters, thereby improving the accuracy of signal analysis. The display control unit 4 displays grounding fault information and environmental parameters in real time, allowing users to quickly understand the line's operating status. The power management unit 7 provides power support for the entire device and monitors the power status in real time to avoid detection interruptions due to insufficient power. The high-strength engineering plastic and waterproof coating design of the device's casing enhances its durability and environmental adaptability, meeting the needs of rapid on-site detection. To better enable those skilled in the art to fully understand and implement this utility model, the specific implementation principle of this utility model is further explained below in conjunction with specific application scenarios.

[0031] In practical applications, the high-frequency signal detection module 8, low-frequency signal detection module 9, and DC signal detection module 10 in signal acquisition unit 1 first collect various signals from the power line. The high-frequency signal detection module 8 uses a magnetic ring sensor structure, with an external shielding layer and secured to the inside of the device housing with clips to effectively reduce the influence of external electromagnetic interference. The low-frequency signal detection module 9 and DC signal detection module 10 employ a differential input circuit design, with their input terminals connected to the signal processing module 2 via soldering to ensure stable signal transmission. These modules transmit the collected high-frequency interference signals, low-frequency fluctuation signals, and DC offset signals to the signal processing module 2 via wires for further processing. This step enables comprehensive monitoring of the power line's operating status and lays the data foundation for subsequent analysis.

[0032] Subsequently, signal processing module 2 sequentially filters, amplifies, and digitizes the received signals. The signals acquired by high-frequency signal detection module 8 are first bandpass filtered to remove irrelevant frequency components and retain the target frequency band signal. The signals acquired by low-frequency signal detection module 9 and DC signal detection module 10 are respectively processed by low-pass filtering and DC bias compensation to eliminate noise interference and extract useful information. The processed signals are transmitted to storage module 5 via the SPI bus for storage, while the analysis results are simultaneously transmitted to display control unit 4 and alarm module 6. This process is completed by the core chip of signal processing module 2—a high-performance microcontroller. Its multi-channel synchronous processing capability ensures the accuracy and real-time performance of signal analysis, thereby meeting the needs of rapid on-site detection.

[0033] Meanwhile, the temperature and humidity sensors built into the environmental adaptation unit 3 continuously collect ambient environmental parameters and transmit these parameters to the signal processing module 2 via wires. The signal processing module 2 performs compensation calculations on the collected power line signals based on the received temperature and humidity data. For example, in high-temperature or high-humidity environments, the signal processing module 2 automatically adjusts the signal gain or filtering parameters to reduce the impact of environmental factors on signal acquisition accuracy. This dynamic compensation mechanism significantly improves the detection reliability of the device in complex environments and also demonstrates the practical significance of the detachable design of the environmental adaptation unit 3, facilitating user replacement or maintenance of sensor components.

[0034] When the signal processing module 2 compares the analysis results with the preset threshold, if an anomaly is detected, it triggers the alarm module 6 to issue a warning. The buzzer in the audible and visual alarm unit is bolted to the inside of the device housing, and the LED light is embedded in the side of the housing; both are connected to the signal processing module 2 via wires. When a grounding fault occurs, the buzzer emits a warning sound, and the LED light flashes synchronously to alert the user. In addition, the vibration alert unit is driven by a miniature motor, which is glued to the inside of the housing. Its power input is connected to the power management unit 7 via wires. In noisy environments, the vibration alert unit provides additional tactile feedback, enhancing the alarm effect. This multi-layered alarm design ensures that the device can promptly and effectively convey fault information to the user in various scenarios.

[0035] During this process, the display control unit 4 displays real-time information about the grounding fault and environmental parameters on an LCD screen. The LCD screen is connected to the signal processing module 2 via a flexible ribbon cable, providing a high-resolution image to ensure clear and legible data display. The button control panel is fixed to the front of the device housing with screws, and its output is connected to the input of the signal processing module 2 via wires to receive user commands. For example, users can set alarm thresholds or view historical records via buttons. This human-machine interface design greatly enhances the user experience, allowing even non-professionals to easily operate the device.

[0036] The power management unit 7 is located at the bottom of the device housing, and its core components include a lithium battery pack, a charging management chip, and a power monitoring chip. The lithium battery pack is fixed inside the housing by a slot, and its positive and negative terminals are connected to the input terminals of the charging management chip via wires. The charging management chip is connected to the power supply terminal of the signal processing module 2 by soldering, providing stable power support for the entire device. The power monitoring chip communicates with the signal processing module 2 via an I2C bus, monitors the remaining power of the lithium battery pack in real time, and transmits the monitoring data to the display control unit 4 for display. When the power is low, the device will automatically prompt the user to charge, avoiding interruption of detection due to depletion of power. This design not only extends the device's battery life but also enhances safety during use.

[0037] Storage module 5 employs a non-volatile memory chip and is connected to signal processing module 2 via an SPI bus. It stores historical data on grounding faults and environmental parameter records. Storage module 5 also features a data export interface, allowing users to export stored data to external devices for further analysis. The capacity design of storage module 5 fully considers the needs of practical application scenarios, capable of storing at least one month's worth of operational data, meeting users' requirements for historical data traceability. This function is of great significance for subsequent fault analysis and line optimization.

[0038] Finally, the device's outer shell is made of high-strength engineering plastic, with a waterproof coating to enhance its waterproof performance. A foldable bracket on the back of the shell is connected to the housing via a rotating shaft with embedded damping washers, allowing users to adjust the bracket's angle and maintain a fixed position as needed. This design not only enhances the device's durability and environmental adaptability but also allows users to flexibly adjust the observation angle in different usage scenarios, further improving the device's portability and practicality.

[0039] In summary, this utility model achieves efficient and accurate detection of power line grounding faults through the coordinated operation of its various modules, while also taking into account portability, reliability, and ease of use, thus meeting the practical needs of rapid on-site detection.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A portable line ground fault monitor, comprising: It includes a signal acquisition unit (1), a signal processing module (2), an environmental adaptation unit (3), a display control unit (4), a storage module (5), an alarm prompt module (6), and a power management unit (7); The signal acquisition unit (1) is used to acquire ground fault signals of power lines and transmit the acquired signals to the signal processing module (2) for analysis and processing. The signal processing module (2) filters, amplifies and digitizes the acquired signal, and then transmits the processed data to the storage module (5) for storage. The storage module (5) compares the stored data with the preset value and transmits the comparison result to the display control unit (4) and the alarm prompt module (6); The power management unit (7) provides power support for the entire device and monitors the power status in real time.

2. A portable line earth fault monitoring device according to claim 1, characterised in that: The signal acquisition unit (1) includes a high-frequency signal detection module (8), a low-frequency signal detection module (9), and a DC signal detection module (10). The high-frequency signal detection module (8) adopts a magnetic ring sensor structure, which is wrapped with a shielding layer and fixed inside the device housing by a buckle. The low-frequency signal detection module (9) and the DC signal detection module (10) adopt a differential input circuit design, and their input terminals are connected to the input interface of the signal processing module (2) by welding.

3. A portable line ground fault monitor according to claim 1, wherein: The environmental adaptation unit (3) includes a temperature sensor and a humidity sensor. The temperature sensor and humidity sensor are connected to the signal processing module (2) via wires to collect environmental parameters and perform compensation calculations. The environmental adaptation unit (3) is installed on the top of the device housing and is fixed to the device body via a threaded connection.

4. The portable line ground fault monitor of claim 1, wherein: The display control unit (4) includes a liquid crystal display screen and a button control panel. The liquid crystal display screen is connected to the signal processing module (2) via a flexible ribbon cable. The button control panel is fixed to the front of the device housing by screws, and its output end is connected to the input end of the signal processing module (2) via a wire.

5. The portable line ground fault monitor of claim 1, wherein: The alarm prompt module (6) includes an audible and visual alarm unit and a vibration prompt unit. The audible and visual alarm unit consists of a buzzer and an LED light. The buzzer is fixed inside the device housing by bolts, and the LED light is embedded on the side of the device housing. The vibration prompt unit is driven by a micro motor, which is fixed inside the device housing by adhesive.

6. The portable line ground fault monitor of claim 1, wherein: The power management unit (7) includes a lithium battery pack, a charging management chip and a power monitoring chip. The lithium battery pack is fixed to the bottom of the device housing by a slot, and its positive and negative terminals are connected to the input terminal of the charging management chip by wires. The power monitoring chip communicates with the signal processing module (2) through the I2C bus.

7. The portable line ground fault monitor of claim 1, wherein: The storage module (5) uses a non-volatile memory chip, which is connected to the signal processing module (2) via an SPI bus. The storage module (5) is equipped with a data export interface, which is connected to the output end of the memory chip by soldering.

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