New take on old favourite - MEMS Ultrasonic Range Finder

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awneil
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Posted by awneil: Wed. Jan 8, 2020 - 03:59 PM
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This ToF sensor uses a tiny ultrasonic transducer chip that sends a pulse of ultrasound and then listens for echoes returning from targets in the sensor’s field-of-view. 

https://www.eenewsanalog.com/news/mems-based-sonar-chip-delivers-extended-tof-range?news_id=124450

 

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awneil
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Posted by awneil: Wed. Jan 8, 2020 - 04:05 PM
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The "old favourite" being this kind of thing:

 

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillator: https://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
Last Edited: Wed. Jan 8, 2020 - 04:07 PM
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Who-me
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Posted by Who-me: Wed. Jan 8, 2020 - 10:10 PM
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awneil wrote:

New take on old favourite - MEMS Ultrasonic Range Finder

 

That's very cute.

TDK have data on the shorter range CH-101

https://product.tdk.com/info/en/documents/catalog_datasheet/tof/DS-000331-CH-101-Datasheet.pdf

and a little more on CH201 

https://www.edacafe.com/nbc/articles/1/1724721/TDK-announces-availability-new-MEMS-based-sonar-silicon-chip-ultrasonic-time-of-flight-sensor-with-extended-sensing-range

Last Edited: Wed. Jan 8, 2020 - 10:17 PM
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avrcandies
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Posted by avrcandies: Thu. Jan 9, 2020 - 05:46 AM
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This will include the CH-201 ultrasonic ToF sensor and associated software solution for

room-scale sensing applications, enabling ultralow power, always-on sensing for human presence detection without privacy concerns.. 

 

Always on sensing for human presence detection, no privacy concerns...yeah, sure thing!!!

Perhaps, they mean compared to video

When in the dark remember-the future looks brighter than ever.   I look forward to being able to predict the future!

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awneil
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Posted by awneil: Thu. Jan 9, 2020 - 09:31 AM (Reply to #4)
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avrcandies wrote:
no privacy concerns...yeah, sure thing!!!

laugh laugh surprise

 

Perhaps, they mean compared to video

I guess so.

 

Presumably what they mean is that it detects when a person - any person - is present, without identifying that person (which, as you say, video would do).

 

As you say, they are very naive if they believe that this has no privacy concerns!

 

surprise

 

Given very little additional information (eg, just the location of the sensor), it is likely to be very easy to make a good stab at identifying the person.

 

I was speaking to someone at an exhibition a while back about this kind of thing. They were saying it is surprisingly (worryingly?) easy to reconstruct identity information from "anonymous" (or anonymised) data ...

 

surprise

 

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillator: https://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
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