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        1. 上海乾思生物科技有限公司
          中級會員 | 第16年

          18916423352

          細胞庫
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          SIGMA現(xiàn)貨,SIGMA代理

          壓力儀表的測試方法和原理

          時間:2011/11/11閱讀:948
          分享:
          本文主要介紹了三種壓力表壓力試驗測定的原理及方法
          1,液柱壓力測量方法:根據(jù)流體靜學(xué)原理,將被測壓力轉(zhuǎn)換成液柱高度測量,常用的表U型管壓力表,壓力表一管,斜管壓力計和活塞式壓力計等。
          2,彈性方法:測試壓力轉(zhuǎn)換彈性元件變形的位移
          補丁:受壓力影響位移,直接驅(qū)動傳動機構(gòu)的指示壓力,但更多的是和其他轉(zhuǎn)換部件結(jié)合使用,通過膈肌和壓力轉(zhuǎn)換成電子信號。
          波紋管位移相對較大,一般在其頂部安裝傳動機構(gòu),驅(qū)動指針直讀,其特點是靈敏度高(尤其是在低級別的地區(qū)),常用于檢測低力,但波紋管滯后誤差較大,精度一般只能達到1.5級
          彈簧管:短接結(jié)構(gòu),使用方便,價格便宜,測量范圍寬,因此應(yīng)用非常廣泛
          3,電壓力測量:利用轉(zhuǎn)換元件(如一些機械和電氣元件)直接測試壓力轉(zhuǎn)化為電信號進行測量。
          (1),彈性元件配件一些映射裝置,使彈性元件的自由轉(zhuǎn)換成位移的電子信號,如電阻,電感,電容,霍爾芯片,應(yīng)變式,振弦式,等
          (2),該彈性元件的壓力迅速組成部分,主要利用某些物體的物理特性和應(yīng)力有關(guān),如壓電,壓阻式壓力,壓磁式,等等。

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