【摘要】 目的:旨在设计一种基于嵌入式微处理器的尿道内压信号采集系统,采集尿道静态压力信号,进行后续分析。方法:①以嵌入式微处理器为核心,与传感器技术原理相结合,完成尿道内压力采集模块及信号放大滤波模块的设计。运用信号反馈原理提高A/D转换的分辨率,进而达到提高测量精度。②利用二线性插值法完成了传感器温漂的软件补偿,以增强采集数据的准确性。结果:在模拟静态尿道压采集的实验中,传感器采集的模拟尿道内压信号与光敏卡尺标定的位移信号一一对应,送入嵌入式微处理器片内RAM中,完成压力与位置的标定。结论:基于ARM的尿道内压信号采集系统具有电路简单、可靠性好、功耗低、分析精度高和现场数据处理能力强的特点。更多还原

【Abstract】 AIM:To design a signal collecting system of urethral internal pressure based on embedded microprocessor(ARM).METHODS:Based on ARM,the signal collecting module of urethral internal pressure and signal amplifier circuit were designed with sensor technology.The A/D transition circuit was improved by signal feedback theory to increase measurement accuracy.The software of sensor temperature drift was rectified by second linear interpolation so to enhance the accuracy of data collection.RESULTS:In simulated static urethral internal pressure collection,the signals of urethral internal pressure that sensor collected were corresponded with the location completely and send them into RAM of ARM for following analysis.CONCLUSION:The ARM-based signal collecting system of urethral internal pressure has simple circuit,reliability,lower power consumption,high precision and strong spot data analysis.更多还原