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當前位置:首頁 » 博揚智能資訊中心 » 傳感器 » 壓阻式壓力傳感器信號調理,補償機制的相互作用

壓阻式壓力傳感器信號調理,補償機制的相互作用

發表時間:2022-03-02 11:45【 閱讀量:-查看手機網址
掃一掃!壓阻式壓力傳感器信號調理,補償機制的相互作用掃一掃!

  壓阻式壓力傳感器只有在對偏移量和由它們對溫度變化的敏感性和制造過程引起的其他影響進行校正后才能使用。線性補償還可以提高精度,但對于大多數應用來說不是必需的。對于中等精度傳感器,電阻網絡可以補償偏移、偏移漂移和FSO漂移(參見下圖)。電橋底部的低電阻分壓器可調整初始偏移。然而,電橋電阻器具有正溫度系數,導致電橋電壓隨溫度升高。

20220228170339.png

  傳統電阻補償電路中三種補償機制的相互作用(Rts用于靈敏度漂移,Rtz用于偏移漂移,以及零調整電阻)使得補償整體溫度漂移變得相當困難。


  為了糾正這個問題,電阻器Rts通過在溫度升高時分流越來越多的激勵電流來穩定靈敏度(以及由于橋電阻增加而產生的橋電壓)。靈敏度本身具有負溫度系數,因此漂移效應在一定程度上相互抵消。以類似的方式,另一個電阻器Rtz可對抗偏移隨溫度的變化。這些補償校正相互影響,需要一種校準方案,該方案有些麻煩,精度有限,并且幾乎不可能作為電子補償來實施。

重生九零小辣椒
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