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如何调试压力钱汇娱乐让误差降到最低?

作者: 来源: 日期:2018-9-28 11:24:40 人气:130

在选择压力钱汇娱乐的时候我们要考虑他的综合精度,而压力钱汇娱乐的精度受哪些方面的影响呢?其实造成钱汇娱乐误差的因素有很多,下面我们注意说四个无法避免的误差,这是钱汇娱乐的初始误差。

首先的偏移量误差:由于压力钱汇娱乐在整个压力范围内垂直偏移保持恒定,因此变换器扩散和激光调节修正的变化将产生偏移量误差。

其次是灵敏度误差:产生误差大小与压力成正比。如果设备的灵敏度高于典型值,灵敏度误差将是压力的递增函数。如果灵敏度低于典型值,那么灵敏度误差将是压力的递减函数。该误差的产生原因在于扩散过程的变化。

第三是线性误差:这是一个对压力钱汇娱乐初始误差影响较小的因素,该误差的产生原因在于硅片的物理非线性,但对于带放大器的钱汇娱乐,还应包括放大器的非线性。线性误差曲线可以是凹形曲线,也可以是凸形曲线称重钱汇娱乐。

最后是滞后误差:在大多数情形中,压力钱汇娱乐的滞后误差完全可以忽略不计,因为硅片具有很高的机械刚度。一般只需在压力变化很大的情形中考虑滞后误差。

压力钱汇娱乐的这个四个误差是无法避免的,我们只能选择高精度的生产设备,利用高新技术来降低这些误差,还可以在出厂的时候进行一定的误差校准,尽最大的可能来降低误差以满足客户的需要。

When choosing a pressure sensor, we should consider its comprehensive accuracy, and the accuracy of the pressure sensor by what aspects of the impact? Actually, there are many factors causing sensor error, we should pay attention to the following four unavoidable errors, this is the initial error of the sensor.

First offset error: Since the vertical offset of the pressure sensor remains constant throughout the pressure range, the variation of the converter diffusion and laser adjustment correction will produce offset error.

The second is the sensitivity error: the size of the error is proportional to the pressure. If the sensitivity of the device is higher than the typical value, the sensitivity error will be an increasing function of pressure. If the sensitivity is lower than the typical value, then the sensitivity error will be a decreasing function of pressure. The reason for this error lies in the change of diffusion process.

The third is the linear error: this is a small impact on the initial error of the pressure sensor, the error is due to the physical non-linearity of the silicon wafer, but for the sensor with amplifier, should also include the non-linearity of the amplifier. The linear error curve can be a concave curve or a convex curve weighing sensor.

Finally, the lag error: in most cases, the lag error of the pressure sensor can be neglected completely, because the silicon wafer has a high mechanical stiffness. In general, we only need to consider lagging error when the pressure changes greatly.

The four errors of pressure sensor are unavoidable, we can only choose high-precision production equipment, use high-tech to reduce these errors, but also in the factory to carry out a certain error calibration, as far as possible to reduce the error to meet customer needs.

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