AD7745在油井含水率检测电路中的应用

油田开发处于高含水期时，准确、可靠地测量油井两相流的含水率具有重要意义。油水混合物中，不同含水率引起的介电常数差异很大，根据这一理论，文章设计了过流式的电容传感器，采用高精度的电容数字转换芯片AD7745，解决了从电容到数字直接转换的复杂且困难的信号处理难题。实验结果表明，该系统性能好、成本低，具有较好的应用价值。

The Application of AD7745 in Water Content Measuring Circuit in Oil Well

Accurate and reliable measurement of water content is of great significance, when oil field development is in a period of high water content. Different water content of the oil-water mixture has great differences in their dielectric constant. According to this theory, a flowing capacitance sensor is designed in this paper by using high-precision capacitance-to-digital converter AD7745. It resolves the complex and difficult signal processing problems of converting from capacitance to digital directly. The test results show that the system has good performance, low cost and better practical value.