Device for measuring atmospheric humidity through high-voltage corona discharge

Abstract

The invention relates to a device and a method for measuring the atmospheric humidity through high-voltage corona discharge and belongs to the technical field of instruments and apparatuses and detection. The device for measuring the atmospheric humidity comprises a microprocessor, a high-voltage generation circuit, a charging circuit, a voltage division circuit, a sampling circuit and a discharging device. The method for measuring the atmospheric humidity comprises the following steps: collecting voltage at two ends of the discharging device by adopting the sampling circuit; processing an output signal of an acquisition circuit through the microprocessor to obtain discharging voltage of the discharging device; then carrying out inversion according to a relational expression of the discharging voltage of the discharging device and the atmospheric humidity to obtain the atmospheric humidity. According to the device and the method, provided by the invention, a response time problem is solved when a humidity-sensing element is used for measuring the humidity and the problem that the measurement response time of a traditional humidity sensor is slow is overcome; the device and the method are applicable to aerological sounding and humidity measurement under a high-humidity environment.

Description

technical field [0001] The invention relates to a device and method for measuring atmospheric humidity through high-voltage corona discharge, belonging to the technical field of instrumentation and detection. Background technique [0002] Humidity is one of the important parameters in meteorological elements, and has important applications in weather forecasting, environmental monitoring, agricultural production, pharmaceutical production, semiconductor device processing, food storage, textiles, power generation, aerospace, locomotives and ships, etc. Generally, the humidity sensor should meet the following requirements: fast response speed, small hysteresis; high reliability, long life; wide temperature range, very small temperature coefficient; strong interchangeability, good refolding; easy to manufacture, low price Low; able to work in corrosive gases, etc. However, it is actually very difficult to fully meet the above requirements. [0003] In the measurement of humid...

AI Technical Summary

Problems solved by technology

[0005] The above humidity sensors have a common problem. They all have a response time problem, and cannot accurately measure the ambient humidity with drastic changes in humidity, such as high-altitude humidity detection.

Large measurement error in low and high humidity environments

Images