Surface acoustic wave temperature and humidity sensor

Abstract

The invention relates to a surface acoustic wave temperature and humidity sensor, belongs to the field of temperature and humidity testing, and solves the problem that an existing sensor cannot simultaneously measure temperature and humidity, or cannot differentiate the signals of multiple sensors. The surface acoustic wave temperature and humidity sensor mutually converts a surface acoustic waveand an electromagnetic wave by an interdigital transducer disposed on a delay line, and calculates the temperature and the humidity by a spread time difference of the surface acoustic wave on the delay line. The surface acoustic wave temperature and humidity sensor measures the temperature and humidity information wirelessly, and reduces the later maintenance of complicated wires. The surface acoustic wave temperature and humidity sensor is a passive device, has a service life not limited by a battery, and is suitable for extreme conditions such as airtightness and high-speed rotation. The surface acoustic wave temperature and humidity sensor integrates coding information and can conveniently obtain the correspondence between monitoring points and monitoring information.

Description

technical field [0001] The invention relates to the technical field of temperature and humidity testing, in particular to a surface acoustic wave temperature and humidity sensor. Background technique [0002] Temperature and humidity measurement play an important role in industry, agriculture and other fields. Generally, temperature and humidity sensors require additional power supply, so additional cables need to be arranged on the measurement occasion, which has a great impact on sensor maintenance and stability. Moreover, the existing sensors usually need to arrange a large number of sensors in one measurement occasion, and there is a problem that it is difficult to correspond one-to-one with the sensor return value and the monitoring point. Contents of the invention [0003] In view of the above analysis, the present invention aims to provide a surface acoustic wave temperature and humidity sensor to solve the problem that existing sensors cannot measure temperature an...

AI Technical Summary

Problems solved by technology

[0003] In view of the above analysis, the present invention aims to provide a surface acoustic wave temperature and humidity sensor to solve the problem that existing sensors cannot measure temperature and humidity at the same time, and cannot realize sensor signal differentiation in the case of multiple sensors

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