ADXL345傾角測(cè)量及數(shù)據(jù)處理技術(shù)研究


摘 要：為了解決在實(shí)際生活中需要知道物體的傾角，即以重力為z軸建立的3軸直角坐標(biāo)系各軸與物體的夾角的問題，選用了美國(guó)模擬器件公司生產(chǎn)的ADXL345 三軸加速度傳感器。選用C8051F340作為MCU，它與ADXL345芯片的通訊采用IIC接口ADXL345作為傳感器件，它具有±16g測(cè)量范圍，其分辨率為3.9mg/LSB，用作傾角測(cè)量時(shí)分辨率足夠。再通過重力來計(jì)算出物體對(duì)應(yīng)傾角。采用了多項(xiàng)式擬合的方法對(duì)ADXL345的輸出數(shù)據(jù)的進(jìn)行了校準(zhǔn)。
關(guān)鍵詞：ADXL345，傾角測(cè)量，加速度，IIC，C8051F340

The study about the measurement of tilt and the
technology of data processing of ADXL345
Abstract: In order to know the amount about the angles between the solidity and 3 axes of the dimensional coordinate system,which choice The direction of gravity as its z axis. It selected ADXL345 which is 3-axis digital acceleration sensor produced by ADI.It uses the IIC between the MCU and ADXL345 as the sensor bus. When ADXL345 is working as a measuring device, It selected ±16g as its measurement range, and this sensor owned 3.9mg/LSB resolution which is enough for daily work. Then we can figure out the angle by dealing with the amount of the gravity measured by ADXL345.It used the way of Polynomial fitting to correct the output data
Key words: ADXL345, angle measurement, acceleration,IIC,C8051F30