電子信息工程外文資料翻譯---壓電式加速度傳感器及其應(yīng)用-電子信息-展示頁
2025-05-26 20:51本頁面
【正文】 uency is far lower than the natural frequency of the accelerometer, the change of force by using is proportional to the acceleration. Because of the piezoelectric sensor output signal is weak charge, and sensor itself has a great internal resistance, so little, the output energy behind the circuit to bring certain difficulties. Therefore, usually the sensor signal to lose to high input impedance of the preamplifier. After impedance transformation can be used in the future, amplification, detection circuit will signal loss to indicating meter or recorder. Second, the piezoelectric acceleration sensor constitute elements (a) center installation pression type (b) ring shear (c) triangle shear Commonly used the piezoelectric accelerometer structure form shown in figure . S is spring, M is the mass, B is base, P is piezoelectric element, R is clamping ring. Figure a is the central Ann loaded pressed type, piezoelectric elementquality piece ofspring system installed in the circular center struts, supports and base connection. This structure has high resonant frequency. However base B and the testing to like connection, if base B are the deformation will directly influence the vibration system output up. In addition, the test object and environment temperature change will affect piezoelectric element, and make preloaded force change, easy cause temperature drift. Figure c to the triangle shear form, by clamping ring piezoelectric element will be the clip in triangle center column in prison. Accelerometer feel axial vibration, bearing the piezoelectric element by shear stress. This structure deformation and temperature changes to the base have extremely good isolation effect, have higher resonance frequency and good linear. Figure b ring, simple structure, shear can make it very small, high resonance frequency accelerometer, the ring of quality stuck to pack in the center of the ring on the pillar piezoelectric element. Due to the binder will increased with temperature bee soft, so the highest working temperature is limited. Three, the piezoelectric acceleration sensor amplitude frequency characteristics The use of accelerometer ceiling depends on the amplitude frequency curve frequency resonant frequency map (figure ). General small damping (z = ) of the accelerometer, upper limit for the resonant frequency if the frequency of a third, can guarantee amplitude error is less than 1 dB (12%)。說明前期準(zhǔn)備階段的文獻(xiàn)調(diào)研做了一定的工作，達(dá)到了預(yù)期的目的 。 畢業(yè)論文 (設(shè)計(jì) )外文資料翻譯 學(xué) 院 ： 專 業(yè)： 電子信息工程 姓 名： 學(xué) 號(hào)： 07418502 外文出處： （用外文寫） 附 件： 外文資料翻譯譯文； 外文原文。 指導(dǎo)教師評(píng)語： 該同學(xué)的外文資料翻譯，緊扣論文主題，語句較通順，翻譯較準(zhǔn)確。 簽名： 2020 年 5 月 20 日 The piezoelectric acceleration sensor and its application Abstract: in recent years the piezoelectric acceleration sensor got bigge
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