Wireless, hand held monitoring device for Medical device application

hardset2000 over 8 years ago

Hi,

I am looking for a hand held (preferably) monitoring device for my spinal decompression chair. I have drawings and pics and working models. I am looking for a device that could monitor the traction pressure and length of stroke of the piston on the chair and time duration of the session. Any thoughts or ideas? Thank you.

jack ellenberger

hardset2000@aol.com

360 710-9331

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beacon_dave over 8 years ago

What sort of accuracy is required ?

For the length of stroke, have you considered low cost ultrasonic or IR measurement sensors ?
There are also the likes of the linear magnetic/optical tape based encoder sensors.
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hardset2000 over 8 years ago in reply to beacon_dave

Plus or minus 3 or 4 percent should be more than enough. No but i'm certainly willing to test them out...any links or websites or do you sell these devices??
Thank you.

jack ellenberger
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hardset2000 over 8 years ago in reply to beacon_dave

Plus or minus 3 or 4 percent should be more than enough. No but i'm certainly willing to test them out...any links or websites or do you sell these devices??
Thank you.

jack ellenberger
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beacon_dave over 8 years ago in reply to hardset2000

IR sensor from Sharp which has a working range of around 10cm to 80cm
https://www.adafruit.com/product/164

These Maxbotix ultrasonic rangefinders have a precision of around 1mm with a working range from 30cm
https://www.adafruit.com/product/983

Time of Flight laser distance sensors
https://www.adafruit.com/product/3316

Magnetic linear encoder
https://www.machine-dro.co.uk/hobby-digital-readout-systems/magnetic-encoders.html

Optical linear encoder
https://www.machine-dro.co.uk/hobby-digital-readout-systems/optical-encoders.html

Linear potentiometer
https://www.reichelt.com/de/en/Position-Sensors/2/index.html?ACTION=2&LA=3&GROUP=B68&GROUPID=6681&START=0&OFFSET=16&SHOW…
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