| 压力传感器在水处理中的应用 |
| 信息来源： 压力传感器 | 2019-04-10 点击量： 4812 |
压力传感器在水处理中的应用是怎样的？西安华恒仪表介绍：我国的环保水处理行业，近些年得到快速的发展，并且未来前景广阔。
What is the application of pressure sensors in water treatment?Xi'an Huaheng Instrument Introduction:China's environmental water treatment industry has developed rapidly in recent years,and the future prospects are broad.
在供水和污水处理工艺中有赖于使用压力传感器为系统保护和质量保证提供重要控制和监测手段。
In water supply and sewage treatment processes,pressure sensors are used to provide important control and monitoring means for system protection and quality assurance.
压力传感器将压力（一般指液体或气体的压力）转换为电信号输出，该压力电信号也可进而用于测量静态流体的液位，因此可用来测量液位。
Pressure sensor converts pressure(generally the pressure of liquid or gas)into electrical signal output,which can also be used to measure liquid level of static fluid,so it can be used to measure liquid level.
压力传感器的敏感组件主要有硅杯敏感元件、硅油、隔离膜片和导气管组成，被测介质压力P通过隔离膜片和硅油传递到硅杯元件的一侧（见图），大气参考压po通过导气管作用到硅杯元件的另一侧，硅杯元件是一个底部加工得很薄的杯形单晶硅片。
The sensitive components of pressure sensor mainly consist of silicon cup sensor,silicon oil,isolation diaphragm and air duct.The measured medium pressure P is transmitted to one side of the silicon cup sensor through isolation diaphragm and silicon oil(see figure).The atmospheric reference pressure Po acts on the other side of the silicon cup sensor through air duct.The silicon cup element is a cup-shaped single crystal silicon chip with very thin bottom processing.
杯底膜片在压力P和Po做用下产生位移极小的弹性变形，单晶硅是理想的弹性体，其变形与压力成严格的正比关系，而且复原性能又极好。
The diaphragm at the bottom of the cup produces elastic deformation with minimal displacement under pressure P and PO.Single crystal silicon is an ideal elastomer.Its deformation is strictly proportional to pressure,and its recovery performance is excellent.
硅膜片上用半导体扩散工艺形成的四个桥路电阻布置成方形，当硅膜片受到压力产生变形时，处于对角线上的二电阻受压应力，而另为二个电阻受张应力，由于扩散硅的压阻效应，使相对的二个电阻阻值增大，二另为二个电阻阻值减小。
The four bridge resistors formed by semiconductor diffusion process are arranged in square.When the silicon diaphragm is deformed by pressure,the compressive stress of two resistors on the diagonal line and the tensile stress of two resistors on the diagonal line increase the relative two resistors due to the piezoresistive effect of diffused silicon and decrease the value of two resistors on the diagonal line.
如果在A-A二端上加上电压，则C-D间就有一个P-Po差压成正比的电压信号输出。
If a voltage is added to the A-A terminals,there will be a voltage signal output proportional to the P-Po differential voltage between the C-D terminals.
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