Static Field Detection

ArchiverArchiver Posts: 46,084
edited 2000-03-16 - 16:57:00 in Microcontrollers
Does anyone know of any type of inexpensive equipment or a basic stamp
solution for measuring any type of ambient static electricity field? I don't
know much about the subject, but I was hoping to have a way to adjust the
sensitivity and have some type of bar graph output or panel meter output.
Any suggestions would be appreciated.

By the way, I'm glad to see that so many people have decided to stick it out
with the move to egroups. This very well might make a great thing even
better.

Thanx in advance,

Kurt G.
______________________________________________________

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2000-03-15 - 17:40:00
    Kurt,

    Static fields can be measured with a small electrode tied to an FET input
    amplifier. A grounded metal chopper wheel rotates between the field you're
    measuring and the sensor plate. You amplify the AC output and rectify it to
    get static field intensity. There are other methods...

    >Does anyone know of any type of inexpensive equipment or a basic stamp
    >solution for measuring any type of ambient static electricity field? I don't
    >know much about the subject, but I was hoping to have a way to adjust the
    >sensitivity and have some type of bar graph output or panel meter output.
    >Any suggestions would be appreciated.

    Mike Hardwick, for Decade Engineering -- <http://www.decadenet.com>
    Manufacturer of the famous BOB-II Serial Video Text Display Module!
  • ArchiverArchiver Posts: 46,084
    edited 2000-03-15 - 17:41:00
    HI,

    If you can find a mosfet device that doesn't have any input diodes
    it would make a good detector, unfortunately it might not last very long!
    The old gold leaf electrometer could be made with aluminum foil and the
    seperation measured with a optical system.
    A vacuum tube also is great and almost indistructable. A triode with the grid
    just left as an antennae will detect low voltage fields, it can also detect high
    voltages by
    a capacitively driven feedback system. This could be part of an A/D loop that
    would give you the
    static field. if you only need the gradient then the triode could have a pair of
    probes one grounded and the other
    to the grid..
    Just some ideas...

    From: "K Gilbert" <busyman1972@h...>
    To: basicstamps@egroups.com
    Date sent: Wed, 15 Mar 2000 07:46:34 CST
    Send reply to: basicstamps@egroups.com
    Subject: [noparse][[/noparse]basicstamps] Static Field Detection

    > Does anyone know of any type of inexpensive equipment or a basic stamp
    > solution for measuring any type of ambient static electricity field? I don't
    > know much about the subject, but I was hoping to have a way to adjust the
    > sensitivity and have some type of bar graph output or panel meter output.
    > Any suggestions would be appreciated.
    >
    > By the way, I'm glad to see that so many people have decided to stick it out
    > with the move to egroups. This very well might make a great thing even
    > better.
    >
    > Thanx in advance,
    >
    > Kurt G.
    > ______________________________________________________
    >
    >
    >
    > eGroups.com home: http://www.egroups.com/group/basicstamps
    > http://www.egroups.com - Simplifying group communications
    >
    >
    >
    >


    ron... the motor man...
    Ronald Doctors
    http://www.members.home.net/rdoctors
  • ArchiverArchiver Posts: 46,084
    edited 2000-03-16 - 14:38:00
    check out the ridiculously inexpensive
    RIDICULOUSLY SENSITIVE CHARGE DETECTOR
    http://www.eskimo.com/~billb/emotor/chargdet.html

    > From: "K Gilbert" <busyman1972@h...>
    > Does anyone know of any type of inexpensive equipment or a basic stamp
    > solution for measuring any type of ambient static electricity field? I
    don't
    > know much about the subject, but I was hoping to have a way to adjust the
    > sensitivity and have some type of bar graph output or panel meter output.
    > Any suggestions would be appreciated.

    Ciao

    Dave Saum
    Infiltec
    http://www.infiltec.com
  • ArchiverArchiver Posts: 46,084
    edited 2000-03-16 - 16:57:00
    Kurt,

    Static fields can be measured with a small electrode tied to an FET input
    amplifier. A grounded metal chopper wheel rotates between the field you're
    measuring and the sensor plate. You amplify the AC output and rectify it to
    get static field intensity. There are other methods...

    >Does anyone know of any type of inexpensive equipment or a basic stamp
    >solution for measuring any type of ambient static electricity field? I don't
    >know much about the subject, but I was hoping to have a way to adjust the
    >sensitivity and have some type of bar graph output or panel meter output.
    >Any suggestions would be appreciated.

    Mike Hardwick, for Decade Engineering -- <http://www.decadenet.com>
    Manufacturer of the famous BOB-II Serial Video Text Display Module!
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