红光测距式浮标气电转换技术及其应用的研究

发布时间：2018-03-13 17:32

本文选题：浮标式气动量仪　切入点：红光传感器　出处：《哈尔滨工业大学》2011年硕士论文　论文类型：学位论文

【摘要】：电液伺服阀阀芯和阀套叠合量的测量是伺服阀加工过程中必不可少的步骤,气动测量具有可实现非接触测量、可做特殊部位的测量、对测量条件要求不高和分辨率高等优点,为此采用气动测量来进行伺服阀阀芯和阀套叠合量的测量。气动测量包括压力式气动测量和流量式气动测量,从原理上讲压力式气动测量压力值与喷嘴开口量大小是非线性的关系,而流量式气动测量测量原理是线性的,为此流量式气动测量方法作为首选。对于流量式气动测量,浮标式气动量仪相对于其他流量传感器所造成的压差恒定,始终等于浮标的重力,这使得它可以应用到伺服阀叠合量测量这样的精密测试中。但普通的浮标式气动量仪需要人工进行读数,为了实现自动化叠合量流量式气动测量,设计了红光测距式浮标气电转换装置。首先介绍了流量式气动测量的原理,分析了如何通过红光测距传感器的来实现浮标式气动量仪浮标的高度的自动化采集,为下一步这个红光测距式浮标气电转换装置的设计提供了理论支撑。然后通过在普通浮标式气动量仪基础上加装红光测距传感器,通过理论计算以及Fluent仿真设计浮标的大小以及形状,并对该装置硬件电路进行了设计分析,最后对整个装置进行实验验证,其测量非线性误差小于普通浮标量仪的测量非线性误差,从而验证了整个装置的可行性。为了将所设计的红光测距式浮标气电转换装置应用到伺服阀阀芯和阀套叠合量测量中,研制了整个叠合量测量台,包括机械夹具部分、电路部分、气路部分以及软件控制部分,最终实现了自动化叠合量流量式气动测量通过对某种型号的伺服阀进行测量,得到的测量结果是合理的,而且整个测量台的不重复性误差不超过1μm,满足生产要求。
[Abstract]:The measurement of the superposition between valve core and valve sleeve of electro-hydraulic servo valve is an essential step in the machining process of servo valve. Pneumatic measurement has the advantages of non-contact measurement, special position measurement, low requirement for measuring condition and high resolution. For this purpose, pneumatic measurement is used to measure the superposition between the valve core and the valve sleeve. Pneumatic measurement includes pressure pneumatic measurement and flow pneumatic measurement. In principle, the pressure value of pressure pneumatic measurement is nonlinear to the nozzle opening, while the flow pneumatic measurement principle is linear. Therefore, the flow pneumatic measurement method is the first choice. The pressure difference caused by the buoy pneumatic meter relative to other flow sensors is constant, always equal to the gravity of the buoy. This allows it to be applied to precise measurements such as servo valve superposition measurement, but ordinary buoy pneumatic gauges require manual readings, in order to achieve automatic superposition flow pneumatic measurements, A red-light ranging device for gas-electric conversion of buoys is designed. Firstly, the principle of flow-type pneumatic measurement is introduced, and how to realize the automatic collection of the height of the buoy by using the red light ranging sensor is analyzed. It provides the theoretical support for the design of the gas-electric conversion device of the red light ranging buoy. Then the size and shape of the buoy are designed through theoretical calculation and Fluent simulation, and the hardware circuit of the device is designed and analyzed by adding the red light ranging sensor on the basis of the ordinary buoy pneumatic meter. Finally, the experimental results show that the measuring nonlinear error of the whole device is smaller than that of the ordinary buoy gauge, which verifies the feasibility of the whole device. In order to apply the designed red-light ranging buoy gas-electric conversion device to the measurement of the superposition between the valve core and the valve sleeve, the whole superposition measurement platform, including the mechanical fixture part and the circuit part, has been developed. In the part of gas path and the part of software control, the automatic superposition flow rate pneumatic measurement is finally realized through the measurement of a certain type of servo valve, and the measured results are reasonable. Moreover, the non-repeatability error of the whole measuring station is not more than 1 渭 m, which meets the production requirements.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH138

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