高精度石英加速度計采集電路設計
發(fā)布時間：2018-10-25 10:17
【摘要】：從高精度捷聯(lián)慣導系統(tǒng)加速度計信號采集需求出發(fā),設計了一種高精度、低功耗、小型化的加速度計信號采集方案,采用數(shù)字補償方案對轉換電路的零位和標度因數(shù)溫度系數(shù)進行了補償校準,補償后其全溫指標提高了一個數(shù)量級。經(jīng)實際電路測試驗證,其在-55℃~+85℃溫度范圍內的標度因數(shù)全溫變化小于0.5 ppm/℃,全溫零位小于10μg,標度因數(shù)年重復性達到10 ppm,電路常溫功耗僅為1.8 W,測試結果表明該電路方案滿足高精度捷聯(lián)慣導系統(tǒng)應用需求。
[Abstract]:According to the requirement of signal acquisition for accelerometer in strapdown inertial navigation system, a high precision, low power consumption and miniaturized accelerometer signal acquisition scheme is designed. The digital compensation scheme is used to compensate and calibrate the zero and scale factor temperature coefficients of the converter circuit. The total temperature index of the converter circuit is increased by an order of magnitude after the compensation. The actual circuit tests show that the full temperature variation of the scale factor in the temperature range of -55 鈩，
本文編號：2293416
[Abstract]:According to the requirement of signal acquisition for accelerometer in strapdown inertial navigation system, a high precision, low power consumption and miniaturized accelerometer signal acquisition scheme is designed. The digital compensation scheme is used to compensate and calibrate the zero and scale factor temperature coefficients of the converter circuit. The total temperature index of the converter circuit is increased by an order of magnitude after the compensation. The actual circuit tests show that the full temperature variation of the scale factor in the temperature range of -55 鈩，
本文編號：2293416
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