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Hardware circuit of surface detection apparatus for insulating tool

A detection device, hardware circuit technology, applied in the direction of measuring device, test circuit, measurement circuit, etc., can solve the problems of complex structure of hardware circuit, low accuracy rate, prone to error, etc., to reduce the volume of hardware circuit and speed of response fast, output voltage error reduction effect

Inactive Publication Date: 2017-04-05
李福霞
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Problems solved by technology

[0003] In order to overcome the disadvantages of complex hardware circuit structure, low stability, error-prone and low accuracy of the existing insulating device along the surface detection device, improve the anti-noise performance of the hardware circuit of the detection device, improve its working stability and simplify the circuit structure, The invention designs a detection circuit applied to the surface detection of insulating appliances

Method used

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  • Hardware circuit of surface detection apparatus for insulating tool

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Embodiment Construction

[0012] figure 1 In the high-voltage generation part, the PWM wave generated by SG3525 indirectly generates a 0-12 V PWM wave by controlling the opening and closing of the FET, and changes the pulse of the PWM wave by adjusting the voltage at the input terminal of the compensation signal of SG3525. Wide, so that the high-voltage package produces a 2.5 kV DC output, and then the 2.5 kV voltage is divided by a resistor and input to the error amplifier to form a feedback loop, so as to achieve the purpose of voltage regulation. Finally, pass the 2.5 kV voltage generated by the high-voltage pack through the reference resistor, and pass the 2.5 kV voltage generated by the high-voltage pack through the insulating pad on the other side. After the voltage is divided, the two are respectively connected to the operational amplifier LM358, and then the method of voltage comparison is used to judge whether the insulating pad is defective, and if there is a defect, the alarm circuit is trig...

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Abstract

The invention designs a hardware circuit of a surface detection apparatus for an insulating tool. The hardware circuit includes two parts: a high voltage generation circuit and an alert circuit. The high voltage generation circuit has simple structure, high output impedance, increased negative feedback loop gain, and smaller output voltage error. The alert circuit with high speed determines the presence of deficiency of an insulating pad by comparing voltages, can rapidly determine the abnormality of the circuit and trigger the alert. The hardware circuit has fast responding sped, simple structure and stable operation, can reduce the volume of a hardware circuit, and is easy to carry. The hardware circuit overcomes the instability and low noise resistance of current circuit detection, and does not easily make mistakes.

Description

technical field [0001] The invention relates to an insulating device along the surface detection device, which is suitable for the occasion of conducting safety detection on the insulating device during live work. Background technique [0002] Power is the heart of electronic equipment, without power all electronic equipment will not work properly. With the development of social economy, various electrical products emerge in an endless stream, more and more, and people's demand for electrical energy is also increasing. Therefore, domestic requirements for power supply reliability are getting higher and higher. Live work refers to a method of testing and repairing high-voltage electrical equipment without power failure. It can effectively improve equipment power supply reliability and social benefits. Live work on running equipment has become an indispensable means to ensure the safe operation of equipment and improve the economic benefits of the power grid. The characteri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/14
CPCG01R31/14G01R31/1245
Inventor 李福霞
Owner 李福霞
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