CAJ | 학술논문

采用硅压阻式压力传感器，以 ATmega88PA 为控制器设计了气压高度计。内嵌全温度范围的曲面拟合算法进行温度补偿及线性化处理，解决了压力传感器的温漂和非线性问题，并用海拔高度与气压的关系计算高度。测量结果通过 RS-485接口发送给上位机。测试结果表明，该气压高度计压力测量误差优于0.50‰，分辨率为0.01 hPa，线性度为0.9999；标准大气环境下高度测量误差为0.16 m，线性度为0.9998。该气压高度计具有质量小、功耗低、精度高、工作可靠等优点。
채용규압조식압력전감기，이 ATmega88PA 위공제기설계료기압고도계。내감전온도범위적곡면의합산법진행온도보상급선성화처리，해결료압력전감기적온표화비선성문제，병용해발고도여기압적관계계산고도。측량결과통과 RS-485접구발송급상위궤。측시결과표명，해기압고도계압력측량오차우우0.50‰，분변솔위0.01 hPa，선성도위0.9999；표준대기배경하고도측량오차위0.16 m，선성도위0.9998。해기압고도계구유질량소、공모저、정도고、공작가고등우점。
An atmospheric pressure altimeter was designed based on ATmega88PA and silicon piezoresistive pressure sensor. The surface fitting algorithm involved with the full temperature range was developed for the temperature compensation. In addition , linearization processing was also used to resolve temperature drift and nonlinearity of the silicon piezoresistive pressure sensor , the compensation algorithm was achieved via controller software and altitude was obtained according to the pressure respectively. It can transfer required data information to the control computer through the interface of RS-485. The testing result indicates that the maximum relative error of the atmospheric pressure altimeter is within 0.50‰, and it has a resolution of 0.01 hPa and a linearity of 0.999 9 involved with the measurement of pressure. The light weight, low power, high precision and reliable altimeter was tested on the condition of the standard atmospheric condition. The altimeter has a relative altitude average standard deviation of 0.16 m and a linearity of 0.999 8.