Comments on: Force Sensor-Controlled Prosthetics Research – FINAL RESULTS AND DOCUMENTS http://www.jeremyblum.com/2008/11/05/everything-you-could-want-to-know-about-force-sensor-controlled-prosthetics/ v3.0 Fri, 10 Feb 2012 07:28:53 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Jeremy Blum http://www.jeremyblum.com/2008/11/05/everything-you-could-want-to-know-about-force-sensor-controlled-prosthetics/comment-page-1/#comment-98 Jeremy Blum Sat, 07 Feb 2009 22:46:38 +0000 HI, Peter. You are correct, but perhaps you misunderstood my use of piezoelectric sensors. The hand made use of two different types of sensors: The tekscan Flexiforce sensors do indeed use a resistive ink that causes a change in resistance and thus voltage, as you described. Those were used to sense pressure applied by my muscles. In addition to those, the fingers were outfitted with a piezoelectric sensor used for vibration detection. When a object begins to slip from the grasp of the hand, it creates small vibrations which caused the piezoelectric sensor to generate a small output voltage. That was interpreted in the microcontroller, and allowed me to have the hand automatically prevent the object from slipping. The next generation of prosthetic device will probably use direct neural connections in conjunction with myoelectrodes. There is also the possibility of force sensors being employed in conjunction with myoelectrodes. However, the most focus is currently being placed on connecting prosthetics directly to the patients nervous system. HI, Peter. You are correct, but perhaps you misunderstood my use of piezoelectric sensors. The hand made use of two different types of sensors: The tekscan Flexiforce sensors do indeed use a resistive ink that causes a change in resistance and thus voltage, as you described. Those were used to sense pressure applied by my muscles. In addition to those, the fingers were outfitted with a piezoelectric sensor used for vibration detection. When a object begins to slip from the grasp of the hand, it creates small vibrations which caused the piezoelectric sensor to generate a small output voltage. That was interpreted in the microcontroller, and allowed me to have the hand automatically prevent the object from slipping.

The next generation of prosthetic device will probably use direct neural connections in conjunction with myoelectrodes. There is also the possibility of force sensors being employed in conjunction with myoelectrodes. However, the most focus is currently being placed on connecting prosthetics directly to the patients nervous system.

]]> By: peter adrian http://www.jeremyblum.com/2008/11/05/everything-you-could-want-to-know-about-force-sensor-controlled-prosthetics/comment-page-1/#comment-96 peter adrian Fri, 06 Feb 2009 21:16:29 +0000 Hello Jeremy, Your work on using force sensrs in prostetcis is very interesting. However, it is my understanding that piezoelectric sensors produce an electric when stressed and also produce stress or strain when an electric feld is applied. Piezelectric sensors generally use a quartz or ceramic material as the sensing element. Tekscan;s sensor are not generally considered piezoelectric sensors . Their sensors use materials whse resistance changes with applied force. We would be interested if you knew of any recent key developements in sensors for prosthetics. Thanks. Sincerely, Peter Adrian Frost & Sullivan Hello Jeremy,

Your work on using force sensrs in prostetcis is very interesting. However, it is my understanding that piezoelectric sensors produce an electric when stressed and also produce stress or strain when an electric feld is applied. Piezelectric sensors generally use a quartz or ceramic material as the sensing element. Tekscan;s sensor are not generally considered piezoelectric sensors . Their sensors use materials whse resistance changes with applied force.

We would be interested if you knew of any recent key developements in sensors for prosthetics. Thanks.

Sincerely,

Peter Adrian
Frost & Sullivan

]]> By: Ub3rslay3r http://www.jeremyblum.com/2008/11/05/everything-you-could-want-to-know-about-force-sensor-controlled-prosthetics/comment-page-1/#comment-12 Ub3rslay3r Sat, 15 Nov 2008 23:19:18 +0000 That would be great. That would be great.

]]> By: Jeremy Blum http://www.jeremyblum.com/2008/11/05/everything-you-could-want-to-know-about-force-sensor-controlled-prosthetics/comment-page-1/#comment-11 Jeremy Blum Fri, 14 Nov 2008 05:58:17 +0000 The mentor whom I worked with has people in his lab working on systems that work in hybrid with force sensors. That may see the light of day at some point... The mentor whom I worked with has people in his lab working on systems that work in hybrid with force sensors. That may see the light of day at some point…

]]> By: Ub3rslay3r http://www.jeremyblum.com/2008/11/05/everything-you-could-want-to-know-about-force-sensor-controlled-prosthetics/comment-page-1/#comment-10 Ub3rslay3r Fri, 14 Nov 2008 04:32:03 +0000 Fascinating project. You did an excellent job on that paper. I found it easy to understand (assuming you know a little bit about electronics). I hope to see that type of prosthetic implemented at a reasonable cost sometime within the next several years. Fascinating project. You did an excellent job on that paper. I found it easy to understand (assuming you know a little bit about electronics). I hope to see that type of prosthetic implemented at a reasonable cost sometime within the next several years.

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