亲爱的大家，
关于这个设备我试着更好地理解灵敏度参数，从数据表中，使用±2.0g的设备（FS位设置为000）我们必须具有0.06 mg /位的灵敏度，因此数字应该是是：±2.0 /(0.06 * 10 ^ -3）=±33333.3实际上我认为±15位，我是对的吗？
从这开始我尝试在设备数据表第17/58页了解术语：
'灵敏度描述了传感器的增益，例如可以通过确定
对其施加1 g加速度。由于传感器可以测量直流加速度，因此可以
通过将感兴趣的轴指向地球的中心，注意输出，可以轻松完成
值，将传感器旋转180度（指向天空）并注意输出值
再次。通过这样做，传感器将施加±1 g的加速度。减去较大的输出
来自较小的值，并将结果除以2，导致实际的灵敏度
传感器。该值随温度和时间变化很小。灵敏度
容差描述了大量传感器的灵敏度范围。“我可能没有正确地理解这句话，如果设备在理论上是理想的，那么这个测量步骤我会看到正好1克，任何差异应该是关于非理想的机械误差，电气偏移等等，你能解释一下为什么用这个程序我可以计算器件灵敏度，我认为更好的是零误差，我在这一点上有点困惑。
你能让我指出正确的方向吗？
最好的祝福
法比奥
以上来自于谷歌翻译
以下为原文
Dear All,
about this device I'm try to better understand the sensi
tivity parameters, from the datasheet, using the device at ±2.0g (FS bit set to 000) we must have a Sensitivity of 0.06 mg/digit, hence the number of digit should be: ±2.0/(0.06*10^-3)=±33333.3 practically I suppose ± 15 bit, I'm right?
From this I try to understand the Terminology at the device datasheet page 17/58:
'Sensitivity describes the gain of the sensor and can be determined, for example, by
applying 1 g acceleration to it. As the sensor can measure DC accelerations this can be
done easily by pointing the axis of interest towards the center of the Earth, noting the output
value, rotating the sensor by 180 degrees (pointing to the sky) and noting the output value
again. By doing so, ±1 g acceleration is applied to the sensor. Subtracting the larger output
value from the smaller one, and dividing the result by 2, leads to the actual sensitivity of the
sensor. This value changes very little over temperature and also time. The sensitivity
tolerance describes the range of sensitivities of a large population of sensors.'may be I've not correctly understanded this sentence, if the device will be thoretically then ideal with this measumerement step I shold see exactly 1 g, any difference should be about non ideality the mechanical error, electrical offset and so on, could you explain a little bit more why with this procedure I can calculate the device sensitivity, I think better the zero error instead, I'm a little confused at this point.
Could you please let me point in right direction?
Best regards
Fabio
举报
