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Power frequency spark tester

A technology of spark testing machine and power frequency, which is applied in the direction of testing circuit, testing dielectric strength, fault location, etc. It can solve the problems of easy false alarm, large waveform distortion, low precision, etc., and achieves easy connection and stable output high voltage , the effect of high detection sensitivity

Inactive Publication Date: 2009-09-09
SHANGHAI ONLINE CONTROL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, most of the control circuits of power frequency spark machines use discrete component circuits and relay control. Due to the error of the analog signal, the waveform distortion is large, and it is easy to generate false alarms. Therefore, its precision is low and the failure rate is high.

Method used

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Embodiment Construction

[0012] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0013] Depend on figure 2 , image 3 It can be seen that the present invention includes: a control circuit; one end of the control circuit is connected to the power supply, and the other end is connected to the alarm display circuit; the control circuit includes: a piece of AT89C2051 chip connected to the display output, a piece of chip connected to the CPU and serial The communication, microprocessor input and output, and PWM circuits are connected to the AT89C52 chip.

[0014] AT89C52 is responsible for voltage regulation and control, breakdown signal detection, counting and alarm signal output, etc. The signal waveform generated by the digital circuit is stable and will not generate false alarms.

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Abstract

The invention relates to a power frequency spark tester. The tester comprises a control circuit, wherein one end of the control circuit is connected with a power supply; the other end of the control circuit is connected with an alarm display circuit; and the control circuit comprises an AT89C2051 chip connected with display output, and an AT89C52 chip which is connected with a CPU, serial communication, input and output of a microprocessor and a PWM circuit respectively. The power frequency spark tester has the advantages that as singlechip computer control, an all-digital display mode and other advanced technology are adopted, the tester has the characteristics of stable output high voltage, high test sensibility and the like; and RS232, RS485, an industrial field bus and other interfaces are arranged, the power frequency spark tester can be conveniently connected with an industrial control computer system.

Description

technical field [0001] The invention relates to a power frequency spark testing machine, in particular to a control circuit of the power frequency spark testing machine. Background technique [0002] The power frequency spark testing machine is a special detection equipment for wire and cable insulation defects. It has high stability, reliability and complete detection capabilities, and can be used in various specifications of wire and cable extrusion and rewinding production lines to detect and record the line. cable defects. [0003] Depend on figure 1 It can be seen that the basic working principle of the power frequency spark testing machine is: after the adjustable low voltage (0~180V) power frequency power supply is boosted by the high voltage transformer, the power frequency high voltage power (0~15kV) for the test is generated and sent to the test electrode. When the cable with insulation defect passes through the test electrode, it will be broken down and spark di...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01R31/14G01R31/08
Inventor 杜伟明
Owner SHANGHAI ONLINE CONTROL EQUIP