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[问答] 近距离测量VL6180X错误
86 传感器
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嘿,
我正在使用VL6180X卫星传感器进行测距测量。连接后,我收到一些测量值 - 但它们是错误的。传感器不会对0mm和~50mm之间的距离变化做出反应。它不断向我显示'4 mm'的值。超过50毫米的距离,值开始增加,这很好。
有什么我忘了吗?我已将偏移设置为0 mm。禁用范围忽略功能和早期收敛(通过寄存器0x02D)。我在黑暗中进行了测量。
提前致谢!

#close-measurement#vl6180x

以上来自于谷歌翻译


以下为原文




Hey,
I am having the VL6180X Satellites sensor for ranging measurements. After connecting it, I receive some measurement values - but they are the wrong ones. The sensor isn't reacting to changes in a distance between 0mm and ~50mm. It keeps showing me the value '4 mm'. Beyond that distance of 50 mm, the values start increasing, which is fine.
Is there anything I am forgetting? I have set the Offset to 0 mm. The range-ignore features and the early convergence are disabLED (by register 0x02D). I peRFormed the measurements in the darkness.
Thanks in advance!

#close-measurement #vl6180x
0
2019-5-13 07:13:41   评论 分享淘帖 邀请回答
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在近距离处,VL53L0有一点盲点。来自激光器的光线在目标和安装传感器的材料之间反弹。这种“多径”意味着报告的距离随着目标变得非常接近而开始增加。如果你可以保证实际距离不会超过1.5厘米,结果是准确的。但是在1.5厘米以下有一个问题。
我们的解决方案是将传感器支撑在某种空腔中,以确保真正的目标不会太靠近。
- 约翰

以上来自于谷歌翻译


以下为原文




At close distances the VL53L0 has a bit of a blind spot. The light from the laser hits bounces between the target and the material the sensor is mounted on. This 'multipath' means the reported distance starts increasing as the target gets very close. If you can guarantee the actual distance never gets closer than 1.5cm, the result is accurate. But below 1.5cm there is an issue.
Our solution is to back the sensor up in some sort of cavity to guarantee the real target cannot get too close.
- john
2019-5-13 07:23:27 评论

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