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.

 

　　在供水和污水處理工藝中有賴于使用壓力傳感器為系統(tǒng)保護(hù)和質(zhì)量保證提供重要控制和監(jiān)測(cè)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.

 

　　壓力傳感器將壓力（一般指液體或氣體的壓力）轉(zhuǎn)換為電信號(hào)輸出，該壓力電信號(hào)也可進(jìn)而用于測(cè)量靜態(tài)流體的液位，因此可用來(lái)測(cè)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.

 

　　壓力傳感器的敏感組件主要有硅杯敏感元件、硅油、隔離膜片和導(dǎo)氣管組成，被測(cè)介質(zhì)壓力P通過(guò)隔離膜片和硅油傳遞到硅杯元件的一側(cè)（見圖），大氣參考?jí)簆o通過(guò)導(dǎo)氣管作用到硅杯元件的另一側(cè)，硅杯元件是一個(gè)底部加工得很薄的杯形單晶硅片。

 

　　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.

 

　　杯底膜片在壓力P和Po做用下產(chǎn)生位移極小的彈性變形，單晶硅是理想的彈性體，其變形與壓力成嚴(yán)格的正比關(guān)系，而且復(fù)原性能又極好。

 

　　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.

 

　　硅膜片上用半導(dǎo)體擴(kuò)散工藝形成的四個(gè)橋路電阻布置成方形，當(dāng)硅膜片受到壓力產(chǎn)生變形時(shí)，處于對(duì)角線上的二電阻受壓應(yīng)力，而另為二個(gè)電阻受張應(yīng)力，由于擴(kuò)散硅的壓阻效應(yīng)，使相對(duì)的二個(gè)電阻阻值增大，二另為二個(gè)電阻阻值減小。

 

　　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二端上加上電壓，則C-D間就有一個(gè)P-Po差壓成正比的電壓信號(hào)輸出。

 

　　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.