阅读说明：本技术 一种手环式三维电场高压验电器 (Bracelet-type three-dimensional electric field high-voltage electroscope ) 是由 王高洁 国伟辉 冯豆 谭勇 张奥 张钊瑞 荆林远 孟晗 李朋宇 闫帅 孔伟杰 于 2020-06-30 设计创作，主要内容包括：本发明公开一种手环式三维电场高压验电器,包括按照信号传输方向上依次连接的三维电场采集电路、前端信号处理电路、微处理器电路、声光报警电路以及为前端信号处理电路、微处理器电路、声光报警电路提供电源的系统供电电路；所述三维电场采集电路用于采集验电区域的三维电场信号,所述前端信号处理电路用于将三维电场信号处理为三维正极性信号,所述微处理器电路用于接收三维正极性信号并分析处理后与设定阈值做对比,所述声光报警电路用于达到阈值时进行声光报警。本发明应用在电力检修中作业前高压无接触式的验电设备,能有效减少由于误入带电区所带来的人身和设备的安全隐患。(The invention discloses a bracelet-type three-dimensional electric field high-voltage electroscope which comprises a three-dimensional electric field acquisition circuit, a front-end signal processing circuit, a microprocessor circuit, an audible and visual alarm circuit and a system power supply circuit, wherein the three-dimensional electric field acquisition circuit, the front-end signal processing circuit, the microprocessor circuit, the audible and visual alarm circuit and the system power supply circuit are sequentially connected in the signal transmission direction; the three-dimensional electric field acquisition circuit is used for acquiring three-dimensional electric field signals of an electroscope area, the front end signal processing circuit is used for processing the three-dimensional electric field signals into three-dimensional positive polarity signals, the microprocessor circuit is used for receiving the three-dimensional positive polarity signals, comparing the three-dimensional positive polarity signals with a set threshold value after analysis and processing, and the acousto-optic alarm circuit is used for carrying out acousto-optic alarm when the threshold value is reached. The invention is applied to high-voltage non-contact electricity testing equipment before operation in electric power overhaul, and can effectively reduce the potential safety hazard of people and equipment caused by mistaken entering of the equipment into an electrified area.)

1. A bracelet type three-dimensional electric field high-voltage electroscope is characterized by comprising a three-dimensional electric field acquisition circuit (1), a front-end signal processing circuit (2), a microprocessor circuit (3), an acousto-optic alarm circuit (4) and a system power supply circuit (5) which is connected in sequence in the signal transmission direction and is used for providing power for the front-end signal processing circuit (2), the microprocessor circuit (3) and the acousto-optic alarm circuit (4); the three-dimensional electric field acquisition circuit (1) is used for acquiring three-dimensional electric field signals of an electricity testing area, the front end signal processing circuit (2) is used for processing the three-dimensional electric field signals into three-dimensional positive polarity signals, the microprocessor circuit (3) is used for receiving the three-dimensional positive polarity signals, analyzing and processing the three-dimensional positive polarity signals, comparing the three-dimensional positive polarity signals with a set threshold value, and the sound and light alarm circuit (4) is used for giving sound and light alarm when the three-dimensional electric field signals reach the threshold.

2. The bracelet-type three-dimensional electric field high-voltage electroscope according to claim 1, wherein the three-dimensional electric field collecting circuit (1) comprises three thin-film metal electrodes respectively located in x, y and z directions; each of the thin film electrodes includes a positive plate, a negative plate, and an insulating layer.

3. The bracelet-type three-dimensional electric field high-voltage electroscope of claim 2, wherein the three thin-film metal electrodes are 10mm in length and width, and 20mm in interval.

4. The bracelet-type three-dimensional electric field high-voltage electroscope according to claim 1, wherein the front-end signal processing circuit (2) comprises three groups of identical circuits respectively processing electric field signals from x, y and z directions, each circuit comprising a differential impedance circuit consisting of R1, R3 and R6, a differential operational amplifier and an addition circuit in sequence.

5. The bracelet-type three-dimensional electric field high-voltage electroscope according to claim 1, wherein the specific model of the microprocessor circuit (3) is STM32F030F4P6, and the specific process of receiving the three-dimensional positive polarity signal and comparing the signal with the set threshold after the signal is analyzed and processed by STM32F030F4P6 is as follows: the three-dimensional positive polarity signal is: voltage: v_x，V_y，V_zElectric field: e_x，E_y，E_z(ii) a The calculation process is as follows:

wherein k represents a ratio of voltage to electric field strength conversion, T_sThe power frequency period of the electric field is E, the electric field intensity after synthesis is E, and the relation between the electric field intensities on three axes is

Setting an alarm threshold value to E_triWhen E is_x>E_triOr E_y>E_triOr E_z>E_tri(ii) a Or E>E_triThe timer built in the microprocessor is triggered to work; the frequency output by the timer is in direct proportion to the difference of the set electric field intensity, the larger the difference is, the higher the frequency output by the timer is, and a signal is sent through a TIM3_ CH1 port of the STM32F030F4P6 to drive the audible and visual alarm circuit (4).

6. The bracelet-type three-dimensional electric field high-voltage electroscope according to claim 5, wherein the STM32F030F4P6 is a microprocessor with 12-bit AD input and 32-bit operation CPU, and TX and RX ports of the STM32F030F4P6 are connected with an external wireless Bluetooth module H1 for information interaction with external wireless handheld device connection.

7. The bracelet-type three-dimensional electric field high-voltage electroscope of claim 6, wherein SWDIO and SWCLK interfaces of TM32F030F4P6 are connected with an external emulator J1 for firmware update or performance detection of a microcontroller.

8. The bracelet-type three-dimensional electric field high-voltage electroscope of claim 6, wherein the TM32F030F4P6 connected LED1 is used for monitoring the working state of the electroscope.

9. The bracelet-type three-dimensional electric field high-voltage electroscope according to claim 1, wherein the sound and light alarm circuit (4) receives a signal TIM3_ CH1 from the microprocessor circuit and triggers a red LED and a buzzer through transistors Q1 and Q2.

10. The bracelet-type three-dimensional electric field high-voltage electroscope according to claim 1, wherein the system power supply circuit (5) is a miniature high-energy-density lithium battery, and outputs 3.3V voltage through a voltage management chip RT9193 to supply energy to the front-end signal processing circuit (2), the microcontroller circuit (3) and the audible and visual alarm circuit (4).

Technical Field

The invention relates to the technical field of power grid equipment, in particular to a bracelet type three-dimensional electric field high-voltage electroscope.

Background

The maintenance of the power system mainly refers to the maintenance of main equipment in the power system, namely, the regular inspection of whether the performance of a machine or other articles is good or not. The power equipment mainly comprises power generation equipment and power supply equipment, wherein the power generation equipment mainly comprises a power station boiler, a steam turbine, a gas turbine, a water turbine, a generator, a transformer and the like, and the power supply equipment mainly comprises power transmission lines, mutual inductors, contactors and the like with various voltage grades. The power equipment is closely related to our life, and the power equipment needs to keep normal operation all the time. In order to ensure the maintenance safety of the power equipment, the power equipment needs to be tested firstly. In the prior art, a contact electroscope is generally used for electroscopy, but the mode has potential safety hazard.

Based on this, a bracelet-type three-dimensional electric field high-voltage electroscope which is simple to operate, convenient to use and high in safety factor is urgently needed.

The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.

Disclosure of Invention

The invention mainly aims to provide the bracelet type three-dimensional electric field high-voltage electroscope which is simple to operate, convenient to use and high in safety coefficient.

In order to achieve the purpose, the invention provides a bracelet-type three-dimensional electric field high-voltage electroscope which comprises a three-dimensional electric field acquisition circuit, a front-end signal processing circuit, a microprocessor circuit, an acousto-optic alarm circuit and a system power supply circuit, wherein the three-dimensional electric field acquisition circuit, the front-end signal processing circuit, the microprocessor circuit and the acousto-optic alarm circuit are sequentially connected in the signal transmission direction; the three-dimensional electric field acquisition circuit is used for acquiring three-dimensional electric field signals of an electroscope area, the front end signal processing circuit is used for processing the three-dimensional electric field signals into three-dimensional positive polarity signals, the microprocessor circuit is used for receiving the three-dimensional positive polarity signals, comparing the three-dimensional positive polarity signals with a set threshold value after analysis and processing, and the acousto-optic alarm circuit is used for carrying out acousto-optic alarm when the threshold value is reached.

Preferably, the three-dimensional electric field acquisition circuit comprises three thin film metal electrodes which are respectively positioned in the x direction, the y direction and the z direction; each of the thin film electrodes includes a positive plate, a negative plate, and an insulating layer.

Preferably, the length and the width of the three thin film metal electrodes are both 10mm, and the three thin film metal electrodes are spaced by 20 mm.

Preferably, the front-end signal processing circuit comprises three groups of same circuits which respectively process electric field signals from the three directions of x, y and z, and each circuit sequentially comprises a differential impedance circuit consisting of R1, R3 and R6, a differential operational amplifier and an addition circuit.

Preferably, the specific model of the microprocessor circuit is STM32F030F4P6, and the specific process of receiving the three-dimensional positive polarity signal and comparing the three-dimensional positive polarity signal with the set threshold after the STM32F030F4P6 is analyzed and processed is as follows: the three-dimensional positive polarity signal is: voltage: v_x，V_y，V_zElectric field: e_x，E_y，E_z(ii) a The calculation process is as follows:

wherein k represents a ratio of voltage to electric field strength conversion, T_sThe power frequency period of the electric field is E, the electric field intensity after synthesis is E, and the relation between the electric field intensities on three axes is

Setting an alarm threshold value to E_triWhen the electric field intensity of any one of the three axes is greater than the alarm threshold, i.e., E_x>E_triOr E_y>E_triOr E_z>E_tri(ii) a Or the resultant electric field strength is greater than an alarm threshold, i.e., E>E_triThe timer built in the microprocessor is triggered to work; the frequency output by the timer is in direct proportion to the difference of the set electric field intensity, the larger the difference is, the higher the frequency output by the timer is, and a signal is sent through a TIM3_ CH1 port of the STM32F030F4P6 to drive the acousto-optic alarm circuit.

Preferably, the STM32F030F4P6 is a microprocessor with a 12-bit AD input and a 32-bit arithmetic CPU, and TX and RX ports of the STM32F030F4P6 are connected to an external wireless bluetooth module H1 for information interaction with an external wireless handheld device.

Preferably, the SWDIO and SWCLK interfaces of the TM32F030F4P6 are connected to an external emulator J1, and are used for firmware update or performance detection of the microcontroller.

Preferably, the TM32F030F4P6 connected LED1 is used for monitoring the operating state of the electroscope.

Preferably, the sound and light alarm circuit receives the signal TIM3_ CH1 from the microprocessor circuit and triggers the red LED and the buzzer through the triodes Q1 and Q2.

Preferably, the system power supply circuit is a miniature high-energy-density lithium battery, and 3.3V voltage is output through a voltage management chip RT9193 to provide energy for the front-end signal processing circuit, the microcontroller circuit and the sound-light alarm circuit.

The invention is applied to high-voltage non-contact electricity testing equipment before operation in electric power overhaul, and can effectively reduce the potential safety hazard of people and equipment caused by mistaken entering of the equipment into an electrified area.

Drawings

Fig. 1 is a functional structure schematic diagram of a bracelet-type three-dimensional electric field high-voltage electroscope of the present embodiment;

fig. 2 is a schematic structural diagram of the three-dimensional electric field acquisition circuit of the present embodiment;

FIG. 3 is a schematic circuit diagram of a front-end signal processing circuit according to the present embodiment;

FIG. 4 is a circuit diagram of the microprocessor circuit of the present embodiment;

FIG. 5 is a schematic diagram of the circuit structure of the sound and light alarm circuit of the present embodiment;

fig. 6 is a schematic circuit diagram of the system power supply circuit of the present embodiment.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.