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Stretch Sensor ? not found — Parallax Forums

Stretch Sensor ? not found

ArchiverArchiver Posts: 46,084
edited 2000-07-20 17:51 in General Discussion
Thanks also for Bruce Bates but the sensor I am looking is not this
Flex(bend)Sensor. It seems like e an elastic rubber wire that can
change in its lenght.
ACJacques

Carl McIver wrote:
>
> http://www.imagesco.com/index.html
>
>
Original Message
> From: A.C.Jacques <acjacques@i...>
> To: <basicstamps@egroups.com>
> Sent: Wednesday, July 19, 2000 4:11 AM
> Subject: [noparse][[/noparse]basicstamps] Stretch Sensor ?
>
> > Does anyone could remember the site of a stretch sensor that is a
> > conductive rubber wire that changes its resistance when stretched and
> > was pointed here a time ago ?
> > I have searched the web but without success.
> > Thanks for any help.
> >
> > ACJacques
> >
> >
> >
> >

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2000-07-20 13:54
    At 09:02 AM 7/20/00, you wrote:
    >Thanks also for Bruce Bates but the sensor I am looking is not this
    >Flex(bend)Sensor. It seems like e an elastic rubber wire that can
    >change in its lenght.


    Are you looking for the pneumatic muscle arm actuator ?

    Perhaps you are looking for Muscle Wire, which changes it's length due to
    heat, and returns to its pre-stressed length upon cooling ??? It is often
    the general belief that it is electricity that causes the change in length,
    but in reality, it is the heat caused by the current flow. It can be used
    BOTH as an actuator, and as a stress/strain element (I believe) although
    the sales pitch is towards the former, not the latter.

    Muscle wire can be found from various sources, HVWTech [noparse][[/noparse] www.hvwtech.com ],
    and Mondotronics ("The Robot Store") and others, as well. The proper
    trademarked name is Nitrinol wire (I believe) due to the alloy, and
    pre-stressing techniques. It is available in various wire sizes and small
    bar stock.

    Regards,

    Bruce Bates
    >ACJacques
    >
    >Carl McIver wrote:
    > >
    > > http://www.imagesco.com/index.html
    > >
    > >
    Original Message
    > > From: A.C.Jacques <acjacques@i...>
    > > To: <basicstamps@egroups.com>
    > > Sent: Wednesday, July 19, 2000 4:11 AM
    > > Subject: [noparse][[/noparse]basicstamps] Stretch Sensor ?
    > >
    > > > Does anyone could remember the site of a stretch sensor that is a
    > > > conductive rubber wire that changes its resistance when stretched and
    > > > was pointed here a time ago ?
    > > > I have searched the web but without success.
    > > > Thanks for any help.
    > > >
    > > > ACJacques
    > > >
    > > >
    > > >
    > > >
  • ArchiverArchiver Posts: 46,084
    edited 2000-07-20 17:51
    "A.C.Jacques" wrote:

    > Thanks also for Bruce Bates but the sensor I am looking is not this
    > Flex(bend)Sensor. It seems like e an elastic rubber wire that can
    > change in its lenght.
    > ACJacques
    >

    A.C.:

    I think you are most likely looking for the "Rubbery Ruler" which was
    invented at the University of Melbourne. Here's the link to their
    information:

    http://www.ph.unimelb.edu.au/inventions/rubberyruler/

    Regards...Don
    --
    __________________________________________________________________________
    Personal Robotics News - Now Online! at
    http://www.personalrobotics.net
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