Abstract
Based on the working principle of SiBCN temperature sensor and the principle of perturbation method, a wireless sweep signal transceiver system based on SiBCN temperature sensor covering 10 ~ 12GHz is designed to measure the temperature in harsh environmental such as high temperature, high oxidation and strong corrosion. Through the joint test of the system, the experimental results show that the resonant frequency and temperature of the sensor are negatively correlated at 25 ~ 350 °C, that is, the temperature is increased and the frequency decreases, which is consistent with the formula.The temperature and frequency change rate is about 421.2kHz / 0 C,which achieve the performance indicators of the SiBCN temperature sensor on the hardware system.
Highlights
In industrial production, for measurements of temperature under harsh environmental conditions such as high temperature,oxidation and corrosion,ordinary temperature sensors has been unable to meet the requirements
This paper uses a temperature-sensitive SiBCN ceramic materials based on microwave resonant wireless passive Temperature sensor [1],to measure the temperature of the harsh environment.SiBCN temperature sensor is a wireless passive microwave resonant cavity temperature sensor, belonging to Transverse Magnetic mode (TM010) resonator[2]
When the ambient temperature of the sensor rises, the dielectric constant increases,which eventually leads to the sensor resonant frequency reduced.the lowest amplitude of the echo signal is shifted to the left.As shown in Figure 2: Waveguide Antenna
Summary
For measurements of temperature under harsh environmental conditions such as high temperature,oxidation and corrosion,ordinary temperature sensors has been unable to meet the requirements. Based on the working principle of SiBCN temperature sensor and the principle of perturbation measurement, this paper designs a hardware system based on SiBCN temperature sensor wireless sweep signal transmission and reception. Antenna transmit constant power sweep signal excitation sensor.the sensor slot antenna receives the sweep signal and a certain frequency point of the sweep signal resonates with the resonant cavity.After a response period, the slot antenna sends different power amplitude echo signal received by the waveguide antenna, and the lowest amplitude point appears. When the ambient temperature of the sensor rises, the dielectric constant increases,which eventually leads to the sensor resonant frequency reduced.the lowest amplitude of the echo signal is shifted to the left.As shown in Figure 2: Waveguide Antenna
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