A Humidity Measurement Method Based on Comb-Shaped Sensor

Humidity measurement is an important link of corrosion monitoring in aircrafts and tanks. But the traditional monitor systems are not portable, can’t be real-time monitoring and other shortcomings. In order to solve these problems, a method that using a new sensor -- comb-shaped capacitive sensor in the humidity monitoring has been proposed. This method is based on electrical theory, combined with the processing of circuit, including the generation of the input signal, signal processing, and acquisition of output signal, and finally analyze the data collected to achieve the purpose of the monitoring of humidity.The problem of how to reduce the noise impact, how to simplify the theoretical calculation and other problems are considered and resolved in the design of the system.Compared with the traditional methods, the system based on this method is simple and compact because of its simple on the hardware design and the characteristics of the sensor. The experimental results show that this method has an very important significance in the atmospheric humidity monitoring.