Digital high-voltage electroscope

Abstract

The application relates to a digital display type high-voltage electroscope, which comprises an electroscope alarm end and a handheld digital display end. The electroscope alarm end is used for inducting an alternating electric field around a high-voltage wire and generating an electric signal, the signal is filtered and amplified to trigger an audible and light alarm, a self-checking function is built in to lock the abnormal state of the equipment, and a rechargeable power supply management is supported. The handheld digital display end is used for receiving and displaying the voltage value transmitted by the electroscope alarm end, and the voltage information is fed back in real time through a visual interface, and a warning signal is triggered synchronously. The technical scheme covers the warning demand in a complex environment through the audible, light and screen display triple alarm mechanism, and ensures the stable transmission of the signal in a high-voltage environment. The sensor, the circuit and the alarm module state are automatically detected through a start-up or regular self-checking procedure, the equipment is locked immediately when an abnormality occurs, and the risk of misoperation is eliminated.

Description

Technical Field

[0001] This application relates to the field of power system safety equipment technology, and in particular to digital display type high voltage detector. Background Technology

[0002] High-voltage detectors are core equipment for the safe operation and maintenance of power systems, used to detect the energized status of lines and equipment. Traditional detectors generally use an alarm method combining a buzzer and a light, which has several significant drawbacks.

[0003] Relying on experience: Operators need to subjectively infer the voltage level based on sound frequency or light brightness, which is prone to misjudgment due to environmental interference or individual differences; Limited alarm methods: In noisy, bright light, or long-distance scenarios, sound and light warnings are easily ignored, highlighting safety hazards; Poor power supply reliability: Dry cell battery power supply is prone to poor contact, and frequent battery replacement affects work efficiency; Lack of self-checking mechanism: Equipment failures cannot be identified in a timely manner, which may lead to the risk of missed or false alarms.

[0004] Although digital display detectors have become increasingly popular in recent years, they still suffer from problems such as weak signal anti-interference ability, insufficient transmission stability, and short battery life, making it difficult to meet the needs of accurate, safe, and efficient detection in high-voltage scenarios. Summary of the Invention

[0005] To address or partially resolve issues in related technologies, this technical solution employs a triple alarm mechanism—audio (≥85dB voice prompts), visual (red flashing light), and screen display (OLED precise values)—to cover warning needs in complex environments, significantly improving safety and reliability. Furthermore, it utilizes high-impedance input circuitry and digital FIR filtering technology to suppress power frequency and high-frequency noise, achieving a voltage detection error of ≤±1%. Shielded wiring or anti-interference wireless transmission design ensures stable signal transmission under high-voltage conditions. The power-on or periodic self-test program automatically detects the status of sensors, circuits, and alarm modules, immediately locking the device in case of abnormalities to eliminate the risk of misoperation.

[0006] The first aspect of this application provides a digital display type high-voltage detector, including...

[0007] The voltage detection alarm terminal is used to sense the alternating electric field around the high-voltage conductor and generate an electrical signal. After filtering and amplifying the signal, it triggers an audible and visual alarm. It has a built-in self-test function to lock the abnormal state of the equipment and supports rechargeable power management.

[0008] The handheld digital display terminal is used to receive and display the voltage value transmitted by the voltage detection alarm terminal, provide real-time feedback of voltage information through a visual interface, and trigger an alarm signal simultaneously.

[0009] An insulated telescopic rod is used to connect the voltage detection alarm terminal and the handheld digital display terminal, providing insulation support and a signal transmission channel. Its length is adjustable to adapt to different working scenarios.

[0010] Optionally, the voltage detection alarm terminal includes:

[0011] Metal detector head, used to contact the surface of high-voltage conductors and sense alternating electric fields;

[0012] A voltage sensor, electrically connected to the metal detector head, converts electric field signals into electrical signals;

[0013] The high-impedance input circuit, filter circuit, and operational amplifier connected in sequence are used for anti-interference processing and amplification of electrical signals;

[0014] PCB, the PCB is used to receive the amplified signal and control the sound and light alarm module (including speaker and LED);

[0015] A self-test button is connected to the PCB. If a sensor or circuit fault is detected after the self-test program is started, the device function will be automatically locked.

[0016] It features a rechargeable lithium battery and a Type-C charging port for power supply and fast charging.

[0017] Optionally, the filtering circuit is a digital finite impulse response (FIR) filter used to suppress power frequency interference and high-frequency noise; the PCB has a built-in voltage threshold comparator that triggers a triple alarm mechanism of ≥85dB voice alarm, red flashing light (3-5Hz) and screen warning when the detected voltage is ≥1kV.

[0018] Optionally, the handheld digital display terminal includes:

[0019] PCB, wherein the PCB receives the voltage signal from the voltage detection alarm terminal via a shielded wire or a wireless module;

[0020] An OLED display screen is used to display voltage values ​​in real time;

[0021] LED lights, which switch between green (standby) and red (danger warning) lights according to voltage status;

[0022] It features a rechargeable lithium battery and a Type-C charging port for power supply and fast charging.

[0023] Optionally, the insulated telescopic rod consists of multiple epoxy resin rod sections and rubber handles.

[0024] The technical solution provided in this application may include the following beneficial effects:

[0025] This technical solution employs a triple alarm mechanism—audio (≥85dB voice prompt), visual (red flashing light), and screen display (OLED precise values)—to cover warning needs in complex environments, significantly improving safety and reliability. Furthermore, it utilizes a high-impedance input circuit and digital FIR filtering technology to suppress power frequency and high-frequency noise, achieving a voltage detection error of ≤±1%. Shielded wires or anti-interference wireless transmission design ensure stable signal transmission even under high-voltage conditions. The power-on or periodic self-test program automatically detects the status of sensors, circuits, and alarm modules, immediately locking the device in case of abnormalities to eliminate the risk of misoperation.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0027] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0028] Figure 1 This is a schematic diagram of the structure of the voltage detection alarm terminal shown in the embodiment of this application;

[0029] Figure 2 This is a schematic diagram of the voltage detection alarm terminal shown in the embodiments of this application;

[0030] Figure 3 This is a schematic diagram of a handheld digital display terminal shown in an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of an insulated telescopic rod shown in an embodiment of this application;

[0032] Figure 5 This is an enlarged front view of the voltage detection alarm terminal shown in an embodiment of this application;

[0033] Figure 6 This is an enlarged schematic diagram of the back of the voltage detection alarm terminal shown in the embodiments of this application;

[0034] Figure 7 This is an enlarged schematic diagram of a handheld digital display terminal shown in an embodiment of this application.

[0035] Figure label:

[0036] 1-Electricity detection alarm terminal, 2-Insulated telescopic rod, 3-Handheld digital display terminal;

[0037] 4-Metal detector head, 5-Electricity alarm terminal housing, 6-Stud, 7-LED light, 8-Self-test button, 9-Battery, 10-PCB, 11-Speaker, 12-Electricity alarm terminal housing cover, 13-Type-C charging port dust plug, 14-Handheld digital display terminal housing cover, 15-OLED display screen, 16-Switch button, 17-Handheld digital display terminal housing, 18-Epoxy resin rod, 19-Rubber handle cover, 20-Electricity switch, 21-Type-C charging port, 22-Handheld terminal Type-C charging port, 23-Handheld terminal indicator light. Detailed Implementation

[0038] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0039] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0040] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] Currently, there are still problems such as weak signal anti-interference ability, insufficient transmission stability, and short battery life, which make it difficult to meet the needs of accurate, safe and efficient detection in high-voltage scenarios.

[0043] To address the aforementioned issues, this technical solution employs a triple alarm mechanism—audio (≥85dB voice prompts), visual (red flashing light), and screen display (OLED precise values)—to cover warning needs in complex environments, significantly improving safety and reliability. Furthermore, it utilizes a high-impedance input circuit and digital FIR filtering technology to suppress power frequency and high-frequency noise, achieving a voltage detection error of ≤±1%. Shielded wiring or anti-interference wireless transmission design ensures stable signal transmission even under high-voltage conditions. The power-on or periodic self-test program automatically detects the status of sensors, circuits, and alarm modules, immediately locking the device in case of abnormalities to eliminate the risk of misoperation.

[0044] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0045] See Figure 1-7 The first aspect of this application provides a digital display high-voltage detector, including a voltage detection alarm terminal 1, a handheld digital display terminal 3, and an insulated telescopic rod 2. The voltage detection alarm terminal 1 is used to sense the alternating electric field around the high-voltage conductor and generate an electrical signal. After filtering and amplifying the signal, it triggers an audible and visual alarm. It has a built-in self-test function to lock the abnormal state of the equipment and supports rechargeable power supply management. The handheld digital display terminal 3 is used to receive and display the voltage value transmitted by the voltage detection alarm terminal 1, provide real-time feedback of voltage information through a visual interface, and trigger an alarm signal simultaneously. The insulated telescopic rod 2 is used to connect the voltage detection alarm terminal 1 and the handheld digital display terminal 3, providing insulation support and a signal transmission channel. Its length is adjustable to adapt to different operating scenarios.

[0046] Specifically, the voltage detection alarm terminal 1 includes: a metal detector 4 for contacting the surface of a high-voltage conductor and sensing an alternating electric field; a voltage sensor electrically connected to the metal detector 4 to convert the electric field signal into an electrical signal; a high-impedance input circuit, a filter circuit, and an operational amplifier connected in sequence for anti-interference processing and amplification of the electrical signal; a PCB 10 for receiving the amplified signal and controlling the audible and visual alarm module (including a speaker 11 and an LED); a self-test button 8 connected to the PCB 10, which automatically locks the device function if a sensor or circuit fault is detected after the self-test program is started; a rechargeable lithium battery 9 and a Type-C charging port 21 for power supply and fast charging. In this embodiment, the metal detector 4 is fixed to the front end of the voltage detection alarm housing 5 by threads to ensure close contact with the internal voltage sensor; the output end of the voltage sensor is sequentially connected to a high-impedance input circuit, a digital FIR filter circuit, and an operational amplifier, and integrated on the PCB10; the audible and visual alarm module (speaker 11, red strobe LED4) is installed on the side of the housing and connected to the PCB10 by wires; the built-in rechargeable lithium battery 9 is powered through the Type-C charging port 21, and an overvoltage / overcurrent protection circuit is set between the battery 9 and the PCB10.

[0047] Based on the above embodiments, the filtering circuit is a digital finite impulse response (FIR) filter used to suppress power frequency interference and high frequency noise; the PCB10 has a built-in voltage threshold comparator, which triggers a triple alarm mechanism of ≥85dB voice alarm, red flashing light (3-5Hz) and screen warning when the detected voltage is ≥1kV.

[0048] Specifically, the handheld digital display terminal 3 includes: a PCB 10, which receives the voltage signal from the voltage detection alarm terminal 1 via a shielded wire or wireless module; an OLED display screen 15, which displays the voltage value in real time; an LED light 7, which switches between green (standby) and red (danger warning) according to the voltage status; a rechargeable lithium battery 9 and a Type-C charging port 21, used for power supply and fast charging. In this embodiment, the OLED display screen 15 is embedded in the front end of the housing and connected to the PCB 10 via a flexible circuit board; the switch button 16 and LED indicator are installed on the side of the housing, and the power supply and status indication are controlled by the main control PCB 10; the rechargeable lithium battery 9 is charged through the Type-C charging port 21, and the battery management system (BMS) is integrated into the main control PCB 10.

[0049] In this embodiment, the insulating telescopic rod 2 is composed of multiple epoxy resin rod sections 18 and rubber handle sleeves 19. In this embodiment, the voltage detection alarm terminal 1 and the handheld digital display terminal 3 are respectively fixed to both ends of the insulating rod by mounting studs 6;

[0050] The insulating rod is composed of 18 nested sections of epoxy resin rods, which can be manually stretched to a maximum of 1175mm or retracted to 400mm;

[0051] Two optional schemes are available for signal transmission:

[0052] Wired mode: Shielded wires are pre-embedded inside the pole to connect the main control modules at both ends, and the outer layer is wrapped with an epoxy resin insulation layer;

[0053] Wireless mode: The main control modules at both ends integrate Bluetooth Low Energy (BLE) modules, with a transmission distance of ≥10 meters and support for encrypted communication.

[0054] Equipment operation procedures

[0055] Step 1: Device Initialization and Self-Test

[0056] Press the switch button 16 on the handheld digital display terminal 3, and the OLED screen will display "System startup in progress"; press and hold the self-test button on the voltage alarm terminal 1 for 83 seconds, and the main control module (PCB107) will start the self-test program: check whether the voltage sensor, filter circuit and operational amplifier signal link are normal; check the lithium battery 9 power (if the power is <20%, the screen will display "Low power"); test the function of the sound and light alarm module (speaker 11 plays the self-test tone, and the LED flashes 3 times); if the self-test passes, the OLED screen will display "READY" and the green light will stay on; if the self-test fails, the device will automatically lock and display "ERROR".

[0057] Step 2: High-voltage electric field detection

[0058] Adjust the insulating rod to the required length and place the metal detector 4 of the voltage detection alarm terminal 1 close to the high-voltage conductor to be tested; the metal detector 4 senses the alternating electric field signal, and the voltage sensor outputs a micro-current signal; after the signal is buffered by the high-impedance input circuit (impedance ≥ 1MΩ), the 50Hz power frequency interference and high-frequency noise are filtered out by the FIR digital filter, and then amplified 100 times by the operational amplifier; the amplified signal is transmitted to the main control module (PCB10) of the handheld digital display terminal 3, and after AD conversion, it drives the OLED screen to display the real-time voltage value (such as "10.5kV±1%)".

[0059] Step 3: Alarm Triggering and Response

[0060] If the detected voltage is ≥1kV (threshold adjustable), the main control module of the voltage detection alarm terminal 1 will trigger synchronously: audible alarm: the speaker 11 will play a "Danger of Electricity" voice prompt of ≥85dB in a loop (supports Chinese and English switching); visual alarm: the red strobe LED 7 will flash at a frequency of 5Hz; display alarm: the voltage value will be displayed in bright red on the handheld OLED screen, and a "Danger" warning icon will pop up; after the operator confirms safety, press the handheld switch button 16 to reset the alarm state.

[0061] Step 4: Charging and Maintenance

[0062] The lithium batteries 9 at both ends are charged via a Type-C interface, supporting the PD fast charging protocol (fully charged in 1 hour); the main control module monitors the health status of the batteries 9 in real time, and if the capacity of the batteries 9 decreases to below 80%, the OLED screen will display "It is recommended to replace the batteries 9"; the detachable shell design makes it easy to replace sensors or upgrade the filtering algorithm firmware.

[0063] In this embodiment, the signal processing accuracy is as follows: the FIR filter cutoff frequency is set to 1kHz, and the signal-to-noise ratio is improved by ≥20dB; the alarm response time is ≤0.5 seconds from the detection of over-limit voltage to the triggering of triple alarm; the battery life is ≥48 hours (wireless mode) or ≥72 hours (wired mode) under full charge; the environmental adaptability is -20℃~60℃, and the protection level is IP65, which meets the requirements for use in harsh outdoor environments.

[0064] In other embodiments, multi-level voltage threshold settings can be configured via the handheld terminal menu to set different alarm thresholds (such as 1kV, 10kV, 35kV) to adapt to different voltage level detection requirements; data recording and export can be achieved through the main control module's built-in storage chip, which can record the most recent 1000 detection data points and export them to a computer for analysis via the Type-C interface; remote monitoring can be achieved by setting the Bluetooth module to support pairing with a mobile APP, allowing real-time remote viewing of voltage data and alarm status.

[0065] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A digital display type high voltage detector, characterized in that: include The voltage detection alarm terminal is used to sense the alternating electric field around the high-voltage conductor and generate an electrical signal. After filtering and amplifying the signal, it triggers an audible and visual alarm. It has a built-in self-test function to lock the abnormal state of the equipment and supports rechargeable power management. The handheld digital display terminal is used to receive and display the voltage value transmitted by the voltage detection alarm terminal, provide real-time feedback of voltage information through a visual interface, and trigger an alarm signal simultaneously. An insulated telescopic rod is used to connect the voltage detection alarm terminal and the handheld digital display terminal, providing insulation support and a signal transmission channel. Its length is adjustable to adapt to different working scenarios. The voltage detection alarm terminal includes: Metal detector head, used to contact the surface of high-voltage conductors and sense alternating electric fields; A voltage sensor, electrically connected to the metal detector head, converts electric field signals into electrical signals; The high-impedance input circuit, filter circuit, and operational amplifier connected in sequence are used for anti-interference processing and amplification of electrical signals; PCB, the PCB is used to receive the amplified signal and control the sound and light alarm module, including a speaker and an LED; A self-test button is connected to the PCB. If a sensor or circuit fault is detected after the self-test program is started, the device function will be automatically locked. A rechargeable lithium battery and a Type-C charging port are used for power supply and fast charging. The filtering circuit is a digital finite impulse response (FIR) filter used to suppress power frequency interference and high-frequency noise; the PCB has a built-in voltage threshold comparator, which triggers a triple alarm mechanism of ≥85dB voice alarm, red flashing light (frequency: 3-5Hz), and screen warning when the detected voltage is ≥1kV. The handheld digital display terminal includes: PCB, wherein the PCB receives the voltage signal from the voltage detection alarm terminal via a shielded wire or a wireless module; An OLED display screen is used to display voltage values ​​in real time; The LED light switches between green (indicating standby) and red (indicating danger warning) depending on the voltage status. A rechargeable lithium battery and a Type-C charging port are used for power supply and fast charging. The insulated telescopic rod consists of multiple sections of epoxy resin rod and rubber handle sleeve.

Images