Thermocouple signal processing system and signal processing method thereof

Abstract

The invention discloses a thermocouple signal processing system and a signal processing method thereof, wherein the thermocouple signal processing system comprises a power supply module, a cold end sampling module, a thermocouple, a thermocouple sampling module, a central processing module and a data transceiving module; the power supply module is used for supplying power to all modules in the system; the cold end sampling module is used for sampling the cold end voltage of the thermocouple and sending the obtained cold end sampling voltage to a central processing module; the thermocouple sampling module is used for acquiring the potential difference between two ends of the thermocouple and sending the acquired potential difference to the central processing module; the central processing module is used for calculating to obtain the ambient temperature to be measured based on a thermocouple temperature acquisition principle, and the data transceiving module is used for transceiving a communication message according to a command of the central processing module; the thermocouple signal processing system measures the cold end temperature value and processes the potential difference converted by the thermocouple, and finally the hot end temperature value to be measured is obtained, so that a vehicle-mounted temperature collector is autonomously controllable.

Description

technical field [0001] The invention relates to the field of automobile sensors, in particular to a thermocouple signal processing system and a signal processing method thereof. Background technique [0002] Automotive temperature sensors are mainly used to measure vehicle exhaust temperature, water tank temperature, air conditioner temperature and other fields. According to their working principles, vehicle temperature sensors are mainly divided into three types: thermocouple type, platinum resistance type and thermistor type. Platinum resistance type temperature sensor has high precision and good linearity, but due to the use of precious metal platinum, its cost is too high, and the measurement temperature range is limited; thermistor type temperature sensor is subdivided into negative temperature coefficient (NTC), positive temperature coefficient (PTC) two, the measurement temperature range can meet the requirements and the cost is not high, but limited by the material t...

AI Technical Summary

Problems solved by technology

Platinum resistance type temperature sensor has high precision and good linearity, but due to the use of precious metal platinum, its cost is too high, and the measurement temperature range is limited; thermistor type temperature sensor is subdivided into negative temperature coefficient (NTC), positive temperature coefficient (PTC) two, the measurement temperature range can meet the requirements and the cost is not high, but limited by material technology, its temperature measurement accuracy is poor

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