Sensor materials are an important foundation for sensor technology, and with the advancement of materials science, people can create a variety of new sensors. For example, a temperature sensor is made of a polymer polymer film, and the optical fiber can be made into various sensors such as pressure, flow rate, temperature, displacement, etc., and a pressure sensor is made of ceramic.
The high molecular polymer can adsorb and release water molecules in proportion to the relative humidity of the surrounding environment. The relative humidity is obtained by making a polymer dielectric into a capacitor and measuring the change in capacitance. The plasma polymerization polystyrene film temperature sensor made by this principle has the characteristics of wide measuring range, wide temperature range, fast response speed, small size, small space measurement, and small temperature coefficient.
The ceramic capacitive pressure sensor is a dry pressure sensor without interposer. Using advanced ceramic technology, thick film electronic technology, its technical performance is stable, the full-scale error of annual drift is less than 0.1%, the temperature drift is small, and the anti-overload can reach hundreds of times of the range.
The application of optical fiber is a major breakthrough in sensing materials. Compared with traditional sensors, optical fiber sensors have many characteristics: high sensitivity, simple structure, small size, corrosion resistance, good electrical insulation, flexible optical path, and easy to realize telemetry. The combination of fiber optic sensors and integrated optical path technology has accelerated the development of fiber optic sensor technology. The integrated optical path device replaces the original optical component and the passive optical device, and the optical fiber sensor has the characteristics of high bandwidth, low signal processing voltage, high reliability, and low cost.
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