A detection method of a temperature detection system

Abstract

The invention discloses a detection method of a temperature detection system. A temperature detection system includes a phase clock generator, the phase clock generator is connected with a TDC time-digital converter and a clock phase processor, and the TDC time-digital The converter is connected with a processor, and the processor is sequentially connected with an encoder, a delayer, and an excitation signal processor, and the excitation signal processor is wirelessly connected with an oscillation sensor, and the oscillation sensor is wirelessly connected with an induction signal processor , the induction signal processor is respectively connected with the TDC time-to-digital converter and the clock phase processor, and the clock phase processor is connected with the TDC time-to-digital converter. The present invention has the flexibility of excitation signal frequency, fast resonant frequency search speed, Resonant frequency detection accuracy, structure and cost have obvious advantages.

Description

[technical field] [0001] The invention relates to a detection method of a temperature detection system. [Background technique] [0002] In many places such as industry, medical treatment, military affairs and life, temperature is an important measurement parameter. There are many kinds of sensors used for temperature measurement, which can be divided into active temperature sensors and passive temperature sensors according to whether they need power supply, and can be divided into wired temperature sensors and wireless temperature sensors according to whether they need cable connection. Active temperature sensors and wired temperature sensors require a physical connection between the sensor and the signal transmission system, making it difficult to meet the requirements in special high-temperature occasions such as rotating parts, non-destructive monitoring, chemical corrosion, and sealed environments, while passive wireless temperature sensors With its unique advantages, i...

AI Technical Summary

Problems solved by technology

The application-specific integrated chip has high measurement accuracy and flexible application, but its cost is high, and it is difficult to apply to occasions with strict cost control; compared with the dedicated TDC chip, the TDC designed with FPGA can also achieve a certain measurement accuracy and measurement range Flexible and versatile, in addition to having the advantage of low cost

FPGA-designed TDCs usually use delay lines. The resolution of the delay line depends on the accuracy of the basic delay units of the delay line. The delay time of each delay unit varies with the supply voltage and temperature. In addition, the consistency of each circuit is difficult to guarantee. The random error increases with the number of units involved in the measurement

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