This paper studies the inductive displacement transducer ’ s structure and its measuring principle , also studies the whole classical measurement system and analyzes its merits and drawbacks according to related experimental findings . to get rid of classical measurement system ’ s drawbacks such as low stability , narrow linear measuring range , etc . and improve measuring system ’ s performance index , this paper ’ s improves several key technologies in the high - accuracy measuring circuit 本文研究了电感位移传感器的结构、测量机理以及其整个测量系统的系统架构,并通过试验认真分析了传统的电感位移传感器精密测量电路的优缺点,结合本课题的研究需要和技术要求,对传统电感位移传感器测量系统稳定不高,线性测量范围小等不足之处进行了改进。
The purpose of this paper is to resolve some key technologies of the amplitude - modulation inductive displacement transducer signal processing circuit with nanometer resolution , such as the design of high stability signal generating circuit ; the technology of high precision digital phase - sensitive detection circuit ; the technology of digital filter and linearization , etc 本文主要研究调幅式电感位移传感器精密测量系统中涉及的高精度载波信号发生技术、高精度数字相敏检波技术、数字滤波及线性拟和等关键技术,目的是进一步改善调幅式电感位移传感器精密测量系统的测量精度,适应纳米级测量的要求。
Control of discharge - sand gate discharge - sand gate adopts electro - hydraulic handspike ; it uses displacement transducer to measure opening of sluice gate ; when opening of displacement transducer is smaller than set point , the electro - hydraulic handspike will open this gate ; when opening of displacement transducer is larger than set point , the electro - hydraulic handspike will close the gate 卸砂门采用电液推杆,由位移传感器检测砂门的开度,当位移传感器检测的开度小于控制系统的给定值时,电液推杆工作将门开大,当位移传感器检测的开度大于控制系统的给定值时,电液推杆工作将门关小。
This article discuss the method to measure distortion of truss by means of ccd device . the distortion can be measured with many kind of displacement transducer , but it must be placed on stable base . when the huge truss is moving through some tunnel , it is difficult to find a stable base , especially there is no enough space for someone to operate . it is hardly to measure the distortion by touching . on the contrary , this can be achieved by means of ccd device 桁架在自重或载荷的作用下产生的挠度可以用多种位移传感器测得,这些测量方法需要有良好的基础,在大型桁架梁测量现场,由于桁架的变形,难于找到这种基准,如果加上测量环境恶劣,人无法操作情况,则会给挠度测量带来极大的困难,而采用光电荷耦合器件,并利用激光进行远程实时挠度测量,即可以解决这个难题。
Thus , the inner parts are found which are the main factors of the total accuracy loss . this result can offer the basis to improve the design of dynamic measurement system and to increase its measuring accuracy . in order to prove the theory of the error tracing and accuracy - loss diagnosis of the dynamic measurement , two simple measuring system are selected , that is , pressure transducer system and the dynamic measuring system based on differential mutual inductive displacement transducer 根据建立的动态系统误差模型,以误差溯源结果为依据,用bp神经网络分析方法,求得系统各组成单元的精度损失规律,建立其精度损失时变模型,从而找出对测量系统的总精度损失影响较大的内部组成单元,为改进动态测量系统的设计、提高其测量精度提供依据。