无线便携式脉象检测系统设计

针对现有脉象仪成本高,不便携带等缺点,结合中医脉诊和移动医疗,设计了一种无线便携式脉象检测系统.采用压电薄膜传感器采集脉象信号;通过信号调理电路,对信号进行放大、滤波、电压抬升等处理;STM32F103单片机对信号进行A/D转换后,采用高通滤波去除基线漂移,加权滑动平均滤波消除毛刺,再通过HC—05蓝牙模块无线传输至Android智能手机;手机端实现信号的波形绘制,脉率及脉象显示.测试结果表明:系统稳定性和准确性良好,具有脉象异常报警功能,且成本低,体积小,功耗低,适于家庭使用.

Design of wireless portable detection system for pulse condition

To overcome the shortcomings of the existing pulse instruments,such as high cost and inconvenience to carry,a wireless portable detecting system for pulse condition is introduced which is based on traditional Chinese pulse-taking and mobile health care. The pulse signal is acquired by using piezoelectric thin-film sensor. It is filtered,amplified and lifted by the signal adjustment circuits. After A/D conversion in the STM32F103 microcontroller,the baseline drift is eliminated by high-pass filtering and the burrs are erased by weighted moving average filtering.The signal is transmitted to the Android smart cell phone wirelessly via the HC—05 Bluetooth module.The signal waveform,the pulse rate and the pulse condition are shown on cell phone terminal.The test results show that the system has good characteristics of stability and accuracy.It is low cost,small size and low-power consumption and it is convenient to use at home with alarm function.