电传感器

• It is a new branch to band piezoelectric chemistry and biological sensing technology . piezoelectric sensors are highly sensitive to multiple signals such as the surface mass and the density , viscosity , conductivity , dielectric effect of the liquid . the piezoelectric sensors are especially suitable for analysis of the proteins with high molecular weight
  压电传感器除了可响应质量效应外，还可响应溶液的粘度、密度、介电常数、电导率等多种信号，除了气相之外，当前的压电传感器还提供液相压电传感理论和应用技术，尤其是用于生物大分子的测定。
• The abnormality of the blood coagulation is always associated with diseases , for example , theoplegia , hemophilia , etc . in clinic , it is important to both doctors and patients that the coagulation function must be clear before taking some medical treatments like surgery , puncturation etc . thus , there is a potential and wide prospective application in coagulation time research using these biosensors because of its advantages such as highly sensitivity , real time detection , small occupying and low cost
  临床实践中,在采取某些医疗措施之前,也必须充分了解该病人的凝血功能情况。因此,凝血系统功能的检查对医疗者和医疗对象都十分重要。压电传感器具有灵敏度高、可实时检测、体积小、成本低廉等特点,因此,研究将压电传感器应用于凝血时间检测将具有潜在的广阔的应用前景。
• Abstract : this paper presents the finite element formulation of frame structures with distributed piezoelectric sensors and actuators . the piezoelectric stiffness matrix and dielectric stiffness matrix of a frame element are derived . a numerical example is given to illustrate the application of piezoelectric sensors and actuators in structure vibration control by implementing two fundamental control laws
  文摘:重点阐述了含压电传感器和执行器的复合结构框架有限元模型的建立过程,导出了压电框架单元的压电刚度矩阵和介电刚度矩阵;进而引入基本控制规律用数值例子说明了压电传感器与执行器在结构的振动控制中的具体应用。
• Because computing exactitude contrail is completed after the event by shooting range photic measure equipment , better quality track record to image collected by photoelectricity sensor become a very important work it exists the problem of data transmission rate low in the process of storing data to hd from high frame frequency and great array ccd camera
  由于靶场光测设备对目标精确轨迹计算的工作要在事后完成，因此对光电传感器采集到的图像数据高质量记录就成为一项极其重要的工作。从电视测量系统的高帧频、大阵列的数字ccd像机采集并存储数据到硬盘的过程中，存在数据传输速率低不能满足要求的问题。
• The three control systems respectively were as follows : ( 1 ) the measuring part of the first one was displacement piezoelectric sensor . a pair of piezoelectric sensor / actuator was collocated by each side of the first solar array plate . the compensator was h ( s ) = 2395 - s ; ( 2 ) the measuring part of the second one was also displacement piezoelectric sensor . a pair of piezoelectric sensor / actuator was collocated by each side of the whole solarfan . tthe compensator was h ( s ) = 244s ; ( 3 ) the measuring part of the third one was velocity piezoelectric sensor . a pair of piezoelectric sensor / actuator was collocated by each side of the three solars array plates near to the body of satellite
  三种控制系统分别是： ( 1 ) 、采用压电位移传感器，压电传感器驱动器对同位布置于内板的边缘，控制器补偿函数为h ( s ) = 2395s ~ ( 1 2 ) ； ( 2 )采用压电位移传感器，压电传感器驱动器对同位布置于整个太阳帆板的边缘，这是一种理想的情况，控制器补偿函数为h ( s ) = 244s ~ ( 1 2 ) ； ( 3 )采用压电速率传感器，压电传感器驱动器对同位布置于靠近星体的三块基板边缘，控制器补偿函数为h ( s ) = 2370s ~ ( 1 2 ) 。
• The system consists of an at89c51 single - chip microprocessor and interface circuits . when visitors or audience come near , the sensor will detects them and the system plays the commentary what is recorded in advance and in the same time , a special chip controls the lights from dark to light changing slowly . when no visitor there the lights become dark automatically , the energy - saving is achieved
  该系统以89c51单片机为控制核心，利用热释电传感器自动探测是否有观众走近观看，通过软件模拟spi通讯协议控制单片语音录/放芯片播放录制好的解说词，同时控制灯光控制芯片控制展台的背景灯光的暗、亮，达到节能效果。
• The early studies are mostly focused on the method of gluing piezoceramics on structural surfaces , which has some disadvantages such as difficulties to protect the ceramics and the connection wires , bad coupling with only one surface glued on the base materials , low signal - to - noise ratio etc . these problems can be solved using the embedded piezoceramics , and furthermore , the piezoceramics can be placed in the optimal positions , especially in the optimal deepness for the piezo - actuators , according to an optimization algorithm befor e they are embedded , so the actuator effects and sensor signals are thereby enhanced
  早期的研究主要集中在表面粘贴压电片的结构，表面粘贴压电片具有一些无法克服的缺点。本文着重进行利用埋入复合材料结构的压电传感器和压电驱动器对其振动进行主动控制的相关理论和实验研究，并介绍其相应结果。埋入型压电材料的优点主要是能保护压电传感器和作动器及其连线、增强压电材料和基体材料的耦合、优化埋入压电陶瓷的深度和厚度可增强压电传感器的测量信号并提高信噪比等。
• This dissertation deals with the active vibration control strategy using the embedded piezoceramics as both actuators and sensors . with several ceramics embedded into the composite material structures during the manufacturing process without knowing the structural behavior in advance , this dissertation makes use of a self identification procedure to get the models of the system . apparently , the on - line self identification method enable people to update the models of system
  另外本文利用埋入复合材料结构中的压电传感器和驱动器对其进行模型识别而得出结构的动力学模型，再将该模型用于控制器的设计，这样做的好处是如果结构本身或者约束、环境等发生变化后，可以很方便地对结构的模型重新进行在线识别，及时更新控制参数，避免控制失效，而且不需要事先知道结构的其它属性。
• In this paper , porous nanocrystalline titanium dioxide films were used to modify the surface of quartz crystal microbalance ( qcm ) , the response of qcm with high roughness layer hi liquid phase was discussed , and the difference between the theoretic value and frequency response measured was illustrated in detail
  本文采用tio _ 2纳米粒多孔膜修饰压电晶体传感器，对高粗糙度压电传感器的响应进行了探讨，阐明了在液相中压电响应的实际值与理论值产生偏差的主要原因。