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把单片机作为系统的控制中心,传感器采用的是Motorola公司的X型的精密硅电压式的压力传感器,转换器采用的是高精度的积分式的ICL7135从而实现采集和转换压力信息。软件上还用到了最小二乘法的最佳拟合直线的相关知识,最小二乘法对于修正采集到的压力数据产生的误差有很大的作用,从而提高系统对压力数据的精确度。本论文中给出了非线性误差补偿的原理以及对相关的实验数据进行了验证,从测试的结果可以得出最小二乘法的非线性进行误差补偿有着明显的效果。
The microcontroller as a system control center, the sensor uses the Motorola X-type precision silicon voltage-type pressure sensor, the converter uses a high-precision integrated ICL7135 in order to achieve the acquisition and conversion of pressure information. The software also uses the least squares method to fit the best fit line knowledge, least squares method to correct the errors of the collected pressure data have a significant role, thereby enhancing the system accuracy of the pressure data. In this paper, the principle of nonlinear error compensation is given, and the related experimental data are verified. From the test results, it can be concluded that the nonlinear least square method performs error compensation with obvious effect.