【摘要】 为解决传统的高精度A/D测量电路中需要在A/D前端搭建多级放大器而带来的成本及检测过程中的漂移问题,采用24位超低噪声模数转换器ADS1232,并在设计过程中使用了多种单片机抗干扰措施,设计出来的高精度测试仪器在硬件和软件上都得到了简化,该系统可以得到一个可靠的高精度的测量结果,解决了桥接传感器的前端问题。实践表明,该系统工作稳定,性能良好。更多还原

【Abstract】 In order to overcome the problems including high cost and drift,caused by the multi-stage amplifiers constructed in the front-end of the Analogy-to-Digital(A/D) in the traditional high precision A/D test circuit,a high-precision testing instrument used 24-bit analog-to-digital converter,a low-noise programmable gain amplifier(PGA),ADS1232 and many anti-interaction techniques of Microchip Controller Unit(MCU) were designed.It simplified both in hardware and software,and it could give reliable and high-precision measurement results.Also,it provided complete front-end for bridge sensor applications.All practical results show this system performance well and stably.更多还原