Research to improve the accuracy of the temperature sensing compensation

• Main Authors: Shen-Hung Chen, 陳聲宏
• Other Authors: 黃顯川
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/66437576035049006808

碩士 === 清雲科技大學 === 電機工程所 === 100 === Most of the sensing element has a precision error problem. Sensor accuracy requirements as the price increase. Many of the early technology can enhance the accuracy of sensors, but unfortunately most of the compensation techniques to hardware mainly in the heavy cost burden, cost-effectiveness is not ideal. This study focuses on how to use low-cost sensors for precision correction in order to achieve high-precision results. Components produced using temperature sensor AD590 temperature sensors. The device output signal is amplified by the single-chip microcontroller SPCE061A will convert analog signals into digital signals and display the results on the 4-character 7-segment display. The measured temperature with the thermometer was accurate to compare. Through experiments we find the temperature accuracy error characteristics, error characteristics of a mathematical model to describe the nonlinear characteristics of AD590.By linear, quadratic curve.Third-order curve to explore ways to compensate for the error. Obtained the required parameter values into the compensation of the chip micro-controller SPCE061A AD590 precision of temperature measurement error compensation.The experimental results verify that effectively reduce the temperature improve sensor precision accuracy error.