【正文】 ale range of the calibration is 1 mm, the linearity error will be %. 畢業(yè)設(shè)計（論文）外文翻 譯 Note that linearity error does not account for errors in sensitivity. It is only a measure of the straightness of the line rather than the slope of the line. A system with gross sensitivity errors can still be very linear. Error band accounts for the bination of linearity and sensitivity errors. It is the measurement of the worstcase absolute error in the calibrated range. The error band is calculated by paring the output voltages at specific gaps to their expected value. The worstcase error from this parison is listed as the system39。m relative to the probe. Focusing the Electric Field When a voltage is applied to a conductor, the electric field emanates from every surface. In a capacitive sensor, the sensing voltage is applied to the sensing area of the probe. For accurate 畢業(yè)設(shè)計（論文）外文翻 譯 measurements, the electric field from the sensing area needs to be contained within the space between the probe and the target. If the electric field is allowed to spread to other items—or other areas on the target—then a change in the position of the other item will be measured as a change in the position of the target. A technique called guarding is used to prevent this from happening. To create a guard, the back and sides of the sensing area are surrounded by another conductor that is kept at the same voltage as the sensing area itself. When the voltage is applied to the sensing area, a separate circuit applies the exact same voltage to the guard. Because there is no difference in voltage between the sensing area and the guard, there is no electric field between them. Any other conductors beside or behind the probe form an electric field with the guard instead of with the sensing area. Only the unguarded front of the sensing area is allowed to form an electric field with the target. Definitions Sensitivity indicates how much the output voltage changes as a result of a change in the gap between the target and the probe. A mon sensitivity is 1 V/ mm. This means that for every mm of change in the gap, the output voltage will change 1 V. When the output voltage is plotted against the gap size, the slope of the line is the sensitivity. A system39。m). This means that at any instant in time, the output could have an error of 181。 電容描述了有一定距離的兩個導電物體怎樣產(chǎn)生一個電壓差。從技術(shù)上講，電容是與導體的表面積和在導體之間介質(zhì)的介電常數(shù)成正比的，與導體之間的距離成反比。一個常見的靈敏度設(shè)置時 V/100 181。 如果 電 場可以傳播到其他項目，或 者目標的其他地區(qū) 在其他項目上這個位置的 改變 作為 衡量 在目標的這個位置上 測量的變化。一個常用靈敏度單畢業(yè)設(shè)計（論文）外文翻 譯 位是 1 V/ mm。但是 在系統(tǒng)清零后，偏移誤差應當改變， 誤差 將被引 入 到 測量。線性誤差通常在百分之方面表示滿量程（％ / FS）的。 從這個比較最壞情況的錯誤被列為該系統(tǒng)的誤差帶。 有些傳感器提供可選 擇的帶寬，以最大限度地提高或分辨率 或響應時間。 如果一個驅(qū)動程序有一個為 10V/1毫米的靈敏度為 V的輸出噪聲，那么它的輸出噪聲 ,2毫米（ ）。當守衛(wèi)關(guān)注感應電場時 ，它創(chuàng)建一個 輕微的 錐形 場這 是一個敏感領(lǐng)域的投影。 雖然電子產(chǎn)品在校準 時可 調(diào)節(jié) 的 ， 但是 有一個對調(diào)整范圍的限制 。 測量非導體 電容式傳感器是最經(jīng)常被用來衡量在導電目標位置的