Two-channel non-contact measurement device of voltage below 1000V

Abstract

The invention provides a two-channel non-contact measurement device of voltage below 1000V. The circuit comprises a sensor, an operational amplifier circuit, a differential circuit, a measuring circuit, a voltage signal observer and a data storing and outputting module. The output end of the sensor sequentially passes through a current circuit, the differential circuit and the measuring circuit and is connected with the input end of the voltage signal observer. The output end data of the voltage signal observer is connected with the input end of the data storing and outputting module. According to the invention, manpower and material resources needed by electrical connection establishing are avoided; a non-contact voltage detection technology is used; the installation process of a voltage acquiring device is greatly simplified; a ZigBee wireless communication module is combined, so that the device has the function of long range, wide range and multi-detection-point wireless remote monitoring and is efficient, visual and the like; a power sector can master the operation state of a low-voltage distribution network in real time; and the device has wide social benefits.

Description

technical field [0001] The invention relates to the field of power electronic measuring instruments, in particular to a dual-channel non-contact voltage measuring device below 1000V. Background technique [0002] As a clean energy widely used at present, electric energy plays a pivotal role in urban household life and industrial production. As my country enters a new era of industrialization, the demand for electricity continues to increase, and the scale of the low-voltage distribution network is also expanding year by year, so the stability of power supply is particularly important. [0003] However, the irregular connection of a large number of nonlinear power equipment and the use of impact loads such as electric arc furnaces directly lead to fluctuations in supply voltage and distortion of voltage waveforms, which seriously reduce the stability of low-voltage distribution network operation. This makes the power supply department need to collect the voltage parameters o...

AI Technical Summary

Problems solved by technology

[0005] 1. The installation is very inconvenient, and the cost of setting up detection points is relatively high;

[0006] 2. There is electrical contact between the tested wire and the test equipment. If the operation is wrong, it may cause a short circuit or an electric shock accident;

[0007] 3. It is necessary to destroy the insulation layer of the transmission line when the wire is drawn out, resulting in potential safety hazards

Images