Temperature measurement calibration method based on PT1000 temperature sensor

Abstract

The invention discloses a temperature measurement calibration method based on a PT1000 temperature sensor. The method comprises the following steps: carrying out data acquisition; to be specific, using a CAN bus to receive original voltage output data at two ends of a PT1000 temperature sensor measured by an ADC module, and recording corresponding output value data and voltage data at two ends ofpotentiometers when n groups of potentiometers have the same value, enabling the n to be an integer greater than 10; carrying out curve fitting; to be specific, fitting the measured data by using a curve fitting tool to obtain a coefficient of an ADC transfer function; carrying out parameter storage; to be specific, the computer sending the coefficient of the ADC transfer function to a DSP through the CAN bus, and receiving the parameters by the DSP and storing the parameters in an EEPROM; and modifying a result measured by the PT1000 temperature sensor according to the ADC transfer functioncoefficient stored in the EEPROM to obtain a modified actual temperature. The temperature measurement calibration method is simple in principle and high in transportability, and the measurement precision of the temperature measurement calibration system is improved.

Description

technical field [0001] The invention relates to the technical field of environmental control systems, in particular to a temperature measurement and calibration method based on a PT1000 temperature sensor. Background technique [0002] Temperature and humidity are the two physical parameters that have the most contact with human beings in nature. Whether it is in the production experiment site or in the residential and leisure places, the collection or control of temperature and humidity is very frequent and important. Moreover, the network remote collection of temperature and humidity and alarm It is an inevitable trend of the development of modern science and technology. Since temperature and humidity are closely related both in terms of physical quantity itself and in actual people's lives, sensors integrating temperature and humidity will be produced accordingly. [0003] Due to the relationship between temperature and resistance of PT1000 platinum resistance, people ha...

AI Technical Summary

Problems solved by technology

The ADC module of the DSP converts the data of the temperature sensor PT1000, and the result sometimes has a large error, and the direct use cannot guarantee the correct control of the entire system, and further calibration is required

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