Miniature electric field sensor calibration system with adjustable temperature and humidity

Abstract

The invention discloses a miniature electric field sensor calibration system with adjustable temperature and humidity, and the system comprises a miniature electric field sensor, wherein the positiveand negative electrodes of an adjustable power supply are respectively connected with the positive and negative electrode plates of a standard electric field electrode plate through an output resistor, and a voltmeter and a discharge resistor are arranged at two ends of the standard electric field polar plate in parallel; a temperature and humidity chamber which comprises a double-layer glass room, a temperature regulator, a humidity regulator, a hygrothermograph and a sensor supporting rod, wherein a sealed cavity is formed in the double-layer glass room; the temperature regulator, the humidity regulator and the hygrothermograph are arranged on the double-layer glass room; the sensor supporting rod penetrates through a bayonet in the double-layer glass room and extends into the center ofthe cavity; the standard electric field polar plate is arranged in a cavity of the double-layer glass room, and positive and negative polar plates of the standard electric field polar plate are led out of the double-layer glass room through wires. The miniature electric field sensor calibration system is simple in structure, easy and convenient to operate, high in accuracy, adjustable in temperature and humidity and suitable for application and popularization.

Description

technical field [0001] The invention relates to the measurement field of miniature electric field sensors, in particular to a calibration system equipped with a temperature and humidity regulator which can calibrate the sensitivity of miniature electric field sensors under different temperature and humidity conditions. Background technique [0002] With the increasingly tense line corridors, the environmental impact of power transmission and transformation projects has become an important factor that must be considered in the process of project planning, feasibility study, design, construction and operation. In some projects, environmental protection issues have become the key to smooth construction and operation. key constraints. With the rapid development of urban and rural construction and the continuous expansion of city scale, the impact of power transmission and transformation projects on nearby residential buildings and various environmentally sensitive areas has beco...

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Problems solved by technology

Usually the size of the balcony of the building cannot meet the above requirements, the measurement needs to be carried out in a narrow environment, and the measured electric field is usually a non-uniform electric field with a large gradient

The current sensor used in electric field monitoring, when the measurement environment is different in temperature and humidity, the different temperature and humidity will have an impact on the measurement sensitivity of the sensor, making the measurement result deviate greatly from the real value, and it is impossible to accurately determine whether the electromagnetic environment exceeds the standard, which may give State Grid Corporation has brought adverse effects, and it is necessary to calibrate the sensitivity of the sensor under different temperature and humidity conditions

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