Electric field sensor based on electrostriction effect

Abstract

The invention provides an electric field sensor based on an electrostriction effect. The electric field sensor includes an electrostriction ceramic block shell, a groove body is arranged in the electrostriction ceramic block shell, a strain gauge is arranged in the groove body, the strain gauge comprises a strain gauge substrate, a grid structure is arranged on the strain gauge substrate, and thegrid structure is connected with one end of the connecting wire through an end point, and the other end of the connecting wire is connected with a bridge circuit, and the strain gauge is attached to the wall of the inner groove body of the electrostriction ceramic block shell through the adhesive. The invention aims to provide an electric field sensor which is simple in structure, small in size, low in power consumption, and can better realize the electric field intensity measurement.

Description

technical field [0001] The invention relates to the technical field of electric field measurement, in particular to an electric field sensor based on the electrostrictive effect. Background technique [0002] The electric field sensor is a sensor with good anti-electromagnetic interference ability and fast response speed, which is mainly used to measure the electric field strength and potential. Electric field sensors are widely used in many fields such as national defense, aerospace, weather detection, electric power, and earthquake prediction. For example, in the field of meteorology, accurate meteorological information can be obtained by using electric field sensors to monitor changes in the atmospheric electric field on the ground and in the air; Take effective measures to prevent accidents. [0003] At present, there are many commonly used electric field sensors, such as corona probe electric field sensors, MEMS electric field sensors, capacitive electric field sensor...

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Problems solved by technology

The corona probe electric field sensor is mainly realized by using a resistor with a large resistance value to make the corona tip current and the electric field intensity have a linear relationship, but the corona probe electric field sensor has a large volume, and some probes even need to reach 2m, and it It is easily affected by climatic conditions, and its reliability will be significantly reduced when used in rainy and snowy weather; MEMS electric field sensor is currently a popular sensor, although it has the advantages of small size, light weight, and low power consumption, but its manufacturing It is more difficult, the requirements for the manufacturing process are very high, and the reliability and accuracy cannot meet the standards of the traditional process; the capacitive electric field sensor is also a widely used sensor, which has a simple structure, small size, strong adaptability, and temperature stability. Good, but in actual use, it is easily affected by external factors such as electrostatic attraction, temperature and humidity, resulting in inaccurate measurement, and its accuracy is not enough to achieve accurate measurement; optical electric field sensor is the most accurate of all current electric field sensors. A good one, it uses the characteristic that the phase difference will change after the light passes through the crystal and performs photoelectric conversion on the light, so that the change of the electric field can be effectively measured. However, the optical electric field sensor itself made by the photoelectric effect is complicated. , the volume is very large, it is not easy to carry, and it also makes this equipment unable to be mass-produced

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