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Digital high-resistance measuring device

A measuring device, digital technology, used in measuring devices, very high resistance measurements, measuring electrical variables, etc.

Pending Publication Date: 2019-08-27
SHANGHAI WEICHENG ELECTRIC EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is: How to continuously detect the resistance value of the high-resistance sensing element installed in the place where the water leakage of the inlet and outlet pipes of the double-water internal cooling generator set may leak in real time is solved.

Method used

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Embodiment Construction

[0032] In order to make the present invention more comprehensible, preferred embodiments are described in detail below with accompanying drawings.

[0033] The present invention is a digital high-resistance measuring device, such as image 3 As shown, it is mainly composed of voltage module, measurement module, 16-bit ADC, single-chip microcomputer, 4-20mA current output module, LCD, keys, RS485 communication interface and alarm module. The voltage module outputs 100V DC voltage to the measurement module; the function of the measurement module is to measure the resistance R X The resistance signal is converted into a voltage signal to the 16-bit ADC; the 16-bit ADC performs analog-to-digital conversion on the voltage and then sends it to the single-chip computer; the single-chip computer calculates the measured resistance R X The resistance value; 4-20mA current output module according to the measured resistance R X The resistance value outputs the corresponding current; the...

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Abstract

The invention discloses a digital high-resistance measuring device. The digital high-resistance measuring device is characterized by comprising a voltage module which outputs a direct-current voltageto a measuring module, the measuring module for converting a resistance signal into a voltage signal and providing the voltage signal for a 16-bit ADC, the 16-bit ADC which performs analog-digital conversion on the voltage signal and then supplies the voltage signal to a single-chip microcomputer, and the single-chip microcomputer which is connected with a 4-20mA current output module and an LCD module; the 4-20mA current output module outputs corresponding currents according to resistance values of measured resistors; and the LCD module displays the resistance values of the measured resistorsin real time. According to the device, the resistance values of the insulation resistors of a high-resistance sensing element are measured in real time, so that whether water leakage faults exist ina water inlet pipe and a water outlet pipe of a dual internal water-cooled generator set or not is detected.

Description

technical field [0001] The invention relates to a digital high-resistance measuring device, which is used for measuring the insulation resistance of industrial equipment, especially the measurement of 50-500 MΩ high resistance, and belongs to the technical field of industrial equipment. Background technique [0002] At present, coal-fired thermal power is the main power generation in our country, and this situation is still difficult to change for a long time. A thermal power plant consists of boilers, steam turbines, generators and corresponding auxiliary equipment, which are connected by pipelines or lines to form the main production system, namely combustion system, steam-water system and electrical system. As the generator, one of the three main equipments of the thermal power plant, it is common to use a double water internal cooling generator set. However, the double-water internal cooling generator set runs for a long time, and the water inlet and outlet pipes of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/14G01R27/02
CPCG01R27/14G01R27/025
Inventor 邵宗耀
Owner SHANGHAI WEICHENG ELECTRIC EQUIP