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[问答] STM8T141怎么禁用环境补偿滤波器
89 STM8 传感器
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你好,


我们想将STM8T141部件用于接近传感器。问题如下:

我们需要禁用环境补偿滤波器(ECF),因为我们认为这将导致麻烦,因为传感器应用意味着在观察到检测点的电容逐渐变化,这可能会使参考电平随着慢电容变化而移动产生缺失的检测。

对于我们的应用,必须修复参考电平,而不是在芯片启动时重新设置。

任何人都可以帮助我们吗?

BR
欧亨尼奥

以上来自于谷歌翻译


以下为原文






Hello,

  
we would like to use the STM8T141 part for proximity sensors. The question is the following:  
  
We need to disable the environmental compensation filter (ECF) as in our opinion this will cause troubles as the sensor application imply a a gradual change in the capacitance under observation up to the detection point and this could move the reference level along with the slow capacitance variation producing a missing detection.
  
For our application the reference level must be fixed and not re-setup at chip startup.
  
Can anyone help us on this?
  
BR
eugenio
0
2019-5-24 15:03:42   评论 分享淘帖 邀请回答

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蒂埃里,
 
 
非常感谢您的支持。
也许我在启动时误解了ECS和校准的含义。我将为您提供工业应用的图片,以避免混淆。
我们需要在接近模式下使用该设备来检测罐中是否存在小塑料颗粒。谷物的水平将朝着末端缓慢减少
传感器应该在何时发生这种情况。晶粒水平下降非常缓慢,因此ECS将跟随电容变化并相应地调整内部轨迹
之后传感器前面没有颗粒。此外,在电源启动时,传感器会根据当前情况调整其内部水平,但在接近情况下
你应该有数字响应不存在。正确?
 BR
 欧亨尼奥

以上来自于谷歌翻译


以下为原文





hi Thierry,


Many thanks for your support.
Maybe I have misunderstood the meaning of ECS and calibration at start up. I will give you the picture of our industrial application in order to avoid confusion.
We need to use the device in proximity mode detecting the presence/absence of small plastic grains in a tank. The level of grains will decrease slowly towards the end and the
Sensor should advise when this happens. The level of grains decreases very slowly so the ECS would follow this capacitance change and adapt the internal track accordingly and
This missing afterwards the absence of grains in front of the sensor. Moreover at power start up the sensor would adapt it's internal level to current situation but in proximity situation
you have should have digital response present not present. Correct?
BR
Eugenio
2019-5-24 15:30:53 评论

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