基于压力和心电信号便携式服装压力舒适性测量设备

Portable garment pressure comfort measuring device based on pressure and ECG signals

为了使研究人员可以根据服装压力与穿着者心率改进服装舒适性,生产出合身且舒适的智能服装,研发了能够同时采集这2种参数的便携式测量系统。以MSP430F149作为主控芯片,利用低功耗蓝牙进行无线通讯,由LabVIEW上位机将采集到的传感器数据进行实时显示;用EMD算法对心电信号进行滤波,自适应阈值检测算法检测R波;选取2名体型差异较大的被试者穿着同一型号的紧身衣进行实验,测量其不同动作下的服装压力与心率的变化。结果表明:系统具有低功耗和便于携带的特点,薄膜压力传感器拟合曲线线性度达0.9989,服装压力与被试者体型即紧身服松紧程度呈正比,滤波后心电信噪比为14.04;之后根据服装压力与心率测试结果,对实验选取的服装过紧的部分提出了具体的修改建议。

In order to enable researchers to improve garment comfort based on garment pressure and heart rate of wearer,and to produce a smart and fit garment,a portable measuring system capable of simultaneously collecting these two parameters was developed.In this dissertation,MSP430F149 is used as the main control chip and low-power Bluetooth for wireless communication.The collected sensor data is displayed in real time by the LabVIEW host computer.The EMD algorithm is used to filter the ECG signal,and the adaptive threshold detection algorithm detects the R wave.Two subjects with different body sizes were selected to wear the same type of tights to test the changes in clothing pressure and heart rate under different movements.The results show that the system has the characteristics of low power consumption and portability.The linearity of the curve pressure sensor fitting curve is 0.9989.The clothing pressure is proportional to the tightness of the subject's body shape,and the signal-to-noise ratio is 14.04 after filtering.Then,according to the test results of clothing pressure and heart rate,specific suggestions for modification of the garments selected by the experiment were put forward.