Error correction method for pressure sensor and calorimeter for measuring pressure by using the same

Abstract

The invention discloses an error correction method for a pressure sensor. The method comprises: basic data are obtained; a basic pressure point is set; a pressure measuring correction curve under an M-degree water temperature is obtained; a pressure measuring correction curve on a basic pressure point is obtained; a pressure measuring correction curve of an M-degree water temperature-basic pressure point unit is obtained; and a pressure measuring value of a calorimeter is corrected. According to the invention, for each pressure sensor, correction is carried on a selected basic pressure point once to complete error correction work of the pressure sensor. With the method, the pressure measuring precision of the pressure sensor is improved and the production efficiency and the calibration and correction efficiencies of the calorimeter can be improved substantially. The provided method is used for pressure measurement with high accuracy; the application becomes reliable; the method is simple and the efficiency is high. In addition, when the error correction method is applied to the calorimeter, the calorimeter has advantages of high measuring precision and reliability.

Description

technical field [0001] The invention specifically relates to a pressure sensor error correction method and a heat meter using the method to measure pressure. Background technique [0002] With the development of the country's economy and technology, the heating system has gradually entered thousands of households, bringing a comfortable and convenient life to the broad masses of the people. The heat meter is an instrument used in the heating system to measure and display the value of the heat released or absorbed by the water flowing through the heat exchange system. It is a key instrument in the system that charges by heat. Its measurement data is an important basis for heat metering and charging in the heating system, so its measurement accuracy, working stability and other technical indicators are very important for both heating companies and users. At the same time, heating companies need to have real-time understanding of the use of heat meters and the thermal conditio...

AI Technical Summary

Problems solved by technology

However, this method will lead to very low production efficiency due to the large number of pressure points to be calibrated and corrected during production.

Therefore, in order to improve production efficiency, most manufacturers reduce the calibration of pressure points in the actual production process, resulting in a large difference between the pressure-correction compensation coefficient curve and the actual situation, and cannot well ensure that the pressure measurement error is within the full-scale pressure range. At the same time, due to the wide range of water temperature required by the heat meter, the same pressure point has different errors at different water temperatures. A single correction compensation curve can no longer guarantee the error of each pressure point within the full range of water temperature range, resulting in The pressure measurement error of the pressure point is inaccurate at different water temperatures

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