一种具有高信噪比的脉搏波光电传感器的研制

目的：探讨研制一种生理信号光电传感器。方法：利用光电传感器检测通过指端毛细血管后的光强度的变化，将光信号转换成电信号，再经过电信号1/V转换、放大、滤波处理。结果：获得了清晰稳定的指端容积脉搏波。结论：高信噪比的光电传感器可用作于临床监测和生理信号分析处理系统。     

Noninvasive monitoring of rotary blood pumps: necessity, possibilities, and limitations

Although rotary blood pumps do not contain an inherent mechanism for adaptation to physiological flow necessities, hitherto only a few efforts have been made to obtain robust monitoring and control methods. This paper discusses the necessity of noninvasive monitoring of such pumps and the crucial points of sensor selection and development. A strategy of monitoring atrial pressure out of the data obtained by the collapse of the atrial wall around the inflow cannula and initial results on animal tests and computer simulation of this method are discussed. This approach might lead to reliable and demand-responsive controllers, if some basic criteria are fulfilled.     

小型血液温度监测记录仪研制

介绍了一种小型血液温度记录仪，首先叙述了系统整体硬件结构，然后就设计中存在的主要问题着重论述了降低系统功耗，电源自动切换、USB接口检测的实现方法，以及采用I^2C总线采集、存储数据的忧势，最后给出上位机软件结构以及具体的实验结果，证实了设计的实用性。     

电子表式止血带的设计

把电子计时器功能和传统卡式止血带相结合，设计出一种带有计时报警功能的电子表式止血带。具有一定的先进性和创新性，     

Consistency of gait characteristics as determined from acceleration data collected at different trunk locations

Estimates of gait characteristics may suffer from errors due to discrepancies in accelerometer location. This is particularly problematic for gait measurements in daily life settings, where consistent sensor positioning is difficult to achieve. To address this problem, we equipped 21 healthy adults with tri-axial accelerometers (DynaPort MiniMod, McRoberts) at the mid and lower lumbar spine and anterior superior iliac spine (L2, L5 and ASIS) while continuously walking outdoors back and forth (20 times) over a distance of 20 m, including turns. We compared 35 gait characteristics between sensor locations by absolute agreement intra-class correlations (2, 1; ICC). We repeated these analyses after applying a new method for off-line sensor realignment providing a unique definition of the vertical and, by symmetry optimization, the two horizontal axes. Agreement between L2 and L5 after realignment was excellent (ICC > 0.9) for stride time and frequency, speed and their corresponding variability and good (ICC > 0.7) for stride regularity, movement intensity, gait symmetry and smoothness and for local dynamic stability. ICC values benefited from sensor realignment. Agreement between ASIS and the lumbar locations was less strong, in particular for gait characteristics like symmetry, smoothness, and local dynamic stability (ICC generally < 0.7). Unfortunately, this lumbar-ASIS agreement did not benefit consistently from sensor realignment. Our findings show that gait characteristics are robust against limited repositioning error of sensors at the lumbar spine, in particular if our off-line realignment is applied. However, larger positioning differences (from lumbar positions to ASIS) yield less consistent estimates and should hence be avoided.     

A dual sensor for real-time monitoring of glucose and oxygen

A dual glucose and oxygen sensor in a polymer format was developed. The dual sensor composed of a blue emitter as the glucose probe, a red emitter as an oxygen probe, and a yellow emitter as a built-in reference probe which does not respond to either glucose or oxygen. All the three probes were chemically immobilized in a polyacrylamide-based matrix. Therefore, the dual sensor possesses three well separated emission colors and ratiometric approach is applicable for analysis of the glucose and oxygen concentration at biological conditions. The sensor was applied for real-time monitoring of glucose and oxygen consumption of bacterial cells, Escherichia coli (E. coli) and Bacillus subtilis (B. subtilis), and mammalian cells of mouse macrophage J774 and human cervical cancer HeLa cell lines. On the other hand, in order to achieve satisfactory sensing performance for glucose, compositions of the matrices among poly(2-hydroxyethyl methacrylate), polyacrylamide, and poly(6-aminohexyl methacrylamide) which is a linker polymer for grafting the glucose probe, were optimized.     

基于可拓学理论的冲压发动机传感器选型研究

依据已建立的亚燃冲压发动机一体化模型,采用可拓学理论中物元与关联函数的概念,将亚燃冲压发动机传感器选型中各个因素间的关系转化成关联函数矩阵,运用层次分析法确定各个因素的权重值,提出一种应用于亚燃冲压发动机传感器选型的综合评价方法。通过对亚燃冲压发动机燃烧室进口温度传感器选型的验证,表明此方法与工程实践相结合,可行性较高。      

光纤温度传感器在永磁共振磁体温控系统中的应用

光纤温度传感器因其在测量和传递信号部分没有电磁的参与,完全不受电磁的干扰。它的抗电磁干扰(EMI/RFI)特性使其具有传统温度传感器无法比拟的应用优势。光纤温度传感器测温是最新的温度测量技术,在强电磁环境下正在取代传统的电介质测温方式。在医疗、核电、工业测温领域有着广阔的发展前景。本文将此新型温度传感器应用于医用磁共振成像系统的永磁体温度控制,详细介绍其工作原理、系统实现并指出其应用优势。