农作物低功耗茎流量仪设计

Design of Low Power Consumption Crops Stem Flow Meter

为了更好地研究农作物生长过程中的蒸腾量,提出了一种基于低功耗MSP430F169微控制器和高精度AD7794相结合的数据采集系统设计方案,并通过实例说明其在作物热脉冲测量仪上的应用。AD7794是一种6通道真差分增益可编程的A/D转换器,具有低功耗、低噪声、分辨率高和自校准等优点,被广泛应用于精密控制、精密温度测量、精密压力测量等领域。AD7794与MSP430F169间通过SPI总线进行数据通讯。

In order to better undergraduate the evapotranspiration in the growth process of agricultural crops, a combina- tion based on the low-power MSP430F169 microcontroller and high precision AD7794 data acquisition system design is proposed, and it is instrumented in the crop transpiration measuring instrument. The AD7794 is a 6-channel true differential gain programmable A / D converter with low power consumption, low noise, high resolution, self-calibration, etc. It is widely used in precision control, precision temperature measurement, precision pressure measurement fields. The data communication between the AD7794 and the MSP430F169 is SPI bus.