针对传统电子血压计硬件电路复杂、易受外部因素和噪声影响、精度和一致性较差的缺点,设计并实现了一种基于示波法的电子血压计。该电子血压计的硬件由STM32控制器配合少量的外部电路构成;信号处理主要由数字滤波器等软件实现;血压分析...针对传统电子血压计硬件电路复杂、易受外部因素和噪声影响、精度和一致性较差的缺点,设计并实现了一种基于示波法的电子血压计。该电子血压计的硬件由STM32控制器配合少量的外部电路构成;信号处理主要由数字滤波器等软件实现;血压分析采用了两阶高斯拟合和变幅度系数法结合的计算模型。设计的样机在10名志愿者的血压测量实验中测得:收缩压平均误差为2.6 mm Hg,标准差为2.2 mm Hg,舒张压平均误差为2.0 mm Hg,标准差为1.6mm Hg,精度高于美国ANSI/AAMI SP10—1992血压测量标准。展开更多
This paper analyses detection errors of blood pressure meter (BPM) based on oscillomatric method with pressure reducing system step by step. The errors of BPM detecting system severely affecting detection accuracy and...This paper analyses detection errors of blood pressure meter (BPM) based on oscillomatric method with pressure reducing system step by step. The errors of BPM detecting system severely affecting detection accuracy and precision were evaluated. It provided a novel algorithm not only ameliorating these errors but also with shorter detection cycle. In order to release cuff air in linearity, this paper also provide a method to control different valve supplied with different power to maintain a certain deflation rate at 4 mmHg/Step. The experiments of these tests are conducted under PC detecting platform developed specially for this usage. The hardware design of interface of microprocessor and the monitoring program based on C language make this detecting system can be transformed to single chip processor system. The final goal of this research is to bring to a portable wrist BPM product and this call for severe demand for power design. Through detecting 60 subjects with different blood pressure the result is that the maximum experimental standard deviations of systolic, diastolic and mean blood pressure are less than 6 mmHg. Comparing with the congeneric product of wrist BPM with nonuniform specification, this systems specification tallies with overall system accuracy demand defined in EN 1060 3.展开更多
针对传统电子血压计不具备压力检定和校准功能的缺点,研制具有校准功能的电子血压计,通过改进血压计的气路结构实现压力的检定和自校准。测量实验中,静压的最大示值误差为2.1 mm Hg,血压为120/80的收缩压和舒张压重复性分别为3.00 mm Hg...针对传统电子血压计不具备压力检定和校准功能的缺点,研制具有校准功能的电子血压计,通过改进血压计的气路结构实现压力的检定和自校准。测量实验中,静压的最大示值误差为2.1 mm Hg,血压为120/80的收缩压和舒张压重复性分别为3.00 mm Hg和1.716 mm Hg,血压为110/75的收缩压和舒张压的重复性分别为3.8 mm Hg和1.716 mm Hg;校准实验中,校准后的静压最大示值误差为0.7 mm Hg,收缩压和舒张压的平均差为1 mm Hg和-1 mm Hg、标准差为2 mm Hg和1.47 mm Hg。结果表明:样机满足JJG692—2010《无创自动测量血压计检定规程》的要求,校准后的样机可重新准确测量静压和血压并且准确度得到提高。展开更多
文摘针对传统电子血压计硬件电路复杂、易受外部因素和噪声影响、精度和一致性较差的缺点,设计并实现了一种基于示波法的电子血压计。该电子血压计的硬件由STM32控制器配合少量的外部电路构成;信号处理主要由数字滤波器等软件实现;血压分析采用了两阶高斯拟合和变幅度系数法结合的计算模型。设计的样机在10名志愿者的血压测量实验中测得:收缩压平均误差为2.6 mm Hg,标准差为2.2 mm Hg,舒张压平均误差为2.0 mm Hg,标准差为1.6mm Hg,精度高于美国ANSI/AAMI SP10—1992血压测量标准。
文摘This paper analyses detection errors of blood pressure meter (BPM) based on oscillomatric method with pressure reducing system step by step. The errors of BPM detecting system severely affecting detection accuracy and precision were evaluated. It provided a novel algorithm not only ameliorating these errors but also with shorter detection cycle. In order to release cuff air in linearity, this paper also provide a method to control different valve supplied with different power to maintain a certain deflation rate at 4 mmHg/Step. The experiments of these tests are conducted under PC detecting platform developed specially for this usage. The hardware design of interface of microprocessor and the monitoring program based on C language make this detecting system can be transformed to single chip processor system. The final goal of this research is to bring to a portable wrist BPM product and this call for severe demand for power design. Through detecting 60 subjects with different blood pressure the result is that the maximum experimental standard deviations of systolic, diastolic and mean blood pressure are less than 6 mmHg. Comparing with the congeneric product of wrist BPM with nonuniform specification, this systems specification tallies with overall system accuracy demand defined in EN 1060 3.
文摘针对传统电子血压计不具备压力检定和校准功能的缺点,研制具有校准功能的电子血压计,通过改进血压计的气路结构实现压力的检定和自校准。测量实验中,静压的最大示值误差为2.1 mm Hg,血压为120/80的收缩压和舒张压重复性分别为3.00 mm Hg和1.716 mm Hg,血压为110/75的收缩压和舒张压的重复性分别为3.8 mm Hg和1.716 mm Hg;校准实验中,校准后的静压最大示值误差为0.7 mm Hg,收缩压和舒张压的平均差为1 mm Hg和-1 mm Hg、标准差为2 mm Hg和1.47 mm Hg。结果表明:样机满足JJG692—2010《无创自动测量血压计检定规程》的要求,校准后的样机可重新准确测量静压和血压并且准确度得到提高。
