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一、引言压力传感器的种类很多,一般来讲,都由两种功能元件组成:一是敏感元件,它感受流体压力,产生一定机械量变化,如弹性变形,位移或弹性系统的固有频率的改变等;另一个是变換元件,它将敏感元件的机械量变化变換为电参量的输出。根据工作原理的不同,已有多种类型的压力传感器,但都有一个共同的特点:必须将流体压力引入传感器中的敏感元件上。为此,通常都要在被测的流体管路上装一个测压接头(例如三通接头)或支管,用于安装传感器。对于流体管路的靜态压力测量或一般的动态压力监测来讲,安装少量的测压接头沒有太大的困难和影响,但是对于较高频率的动态压力和瞬变过程的研究来说,却出现了矛盾和问题。拿液压系统脉动压力的研究作为例
I. INTRODUCTION There are many types of pressure sensors. Generally speaking, they are composed of two kinds of functional components. One is the sensitive component, which senses the fluid pressure and produces a certain amount of mechanical changes such as elastic deformation, displacement or natural frequency change of the elastic system Etc .; the other is the transformation element, which changes the mechanical changes of the sensitive elements into the output of the electrical parameters. Depending on the operating principle, there are several types of pressure sensors, but all have one thing in common: fluid pressure must be introduced into the sensor’s sensing element. For this purpose, usually a pressure-measuring fitting (for example a tee fitting) or a branch pipe is to be fitted to the fluid line under test for mounting the sensor. For the static pressure measurement of fluid lines or general dynamic pressure monitoring, the installation of a small number of pressure-measuring joints does not have much difficulty and impact, but for the study of dynamic pressure and transient processes at higher frequencies, There have been contradictions and problems. Take the study of pulsating pressure in hydraulic system as an example