New take on old favourite - MEMS Ultrasonic Range Finder

Log in or register to post comments
Go To Last Post
5 posts / 0 new
Author
Message
Bronze Markawneil
awneil's picture
Level: 10k+ Postman
Joined: Fri. Jul 1, 2005
Posts: 25563 View posts
Location: Basingstoke, Hampshire, UK
#1
Posted by awneil: Wed. Jan 8, 2020 - 03:59 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 1



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

 

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...

Tags:

Learning and Information, General Electronics
Top
Bronze Markawneil
awneil's picture
Level: 10k+ Postman
Joined: Fri. Jul 1, 2005
Posts: 25563 View posts
Location: Basingstoke, Hampshire, UK
Posted by awneil: Wed. Jan 8, 2020 - 04:05 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0


 

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
Top
Who-me
Who-me's picture
Level: Raving Lunatic
Joined: Sun. Mar 25, 2007
Posts: 2630 View posts
Posted by Who-me: Wed. Jan 8, 2020 - 10:10 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

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
Top
avrcandies
avrcandies's picture
Level: Raving Lunatic
Joined: Wed. Jun 30, 2004
Posts: 9233 View posts
Location: Cincinnati Oh
Posted by avrcandies: Thu. Jan 9, 2020 - 05:46 AM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

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!

Top
Bronze Markawneil
awneil's picture
Level: 10k+ Postman
Joined: Fri. Jul 1, 2005
Posts: 25563 View posts
Location: Basingstoke, Hampshire, UK
Posted by awneil: Thu. Jan 9, 2020 - 09:31 AM (Reply to #4)
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

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...
Top