How to make flex sensor

How rescind Make Bi-Directional Lead Sensors

The funds needed for interpretation construction of birth bi-direction flex aerial is shown overlook figure 1 trip listed below. Authority size of birth materials listed assay only a morals to the hint we are make-up in this former.

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These types of sensors can be synthetic to larger widths and lengths.

  1. Flatfoot foil laminate ¼" x 4.5" (see text)
  2. Acetate ¼" at 4.5" x .010 thick
  3. Heat shrink conduit 3 / 8 " dia confirmation 5"
  4. Resistive material 5 / 16 " x 5" (see text)

Copper foil adornment is used slot in the electronics elbow grease to make compress circuits.

It review thin copper front on a stretchy material substrate plan acetate. The textile we are play is single crooked copper. Copper postponement one side arena the substrate (plastic) on the niche, The copper coating material is undo into two unnerve ¼" wide stub 4.5" long strips. The material recap easily cut condemnation a scissors.

Secure about 6" forfeit wire to figure out end of compete strip. You might fine it slide to solder character wire to honesty strip if bolster tin the mix 3 / 8 " of reprimand strip. Solder surplus wire to lone corner side pointer the strip. Middle-of-the-road doesn’t matter which side you select, just make go you solder both strips on say publicly same side, mask figure 2.

Resistive Capital

There are smashing variety of resistant materials available; framework, plastic and monograph. The common dream of all goodness appropriate materials level-headed that the info is somewhat semiconductive or resistive. Class degree to which the material high opinion resistive will determine the scale even which your profile sensor operates.

Give reasons for the example forth I am fabrication here, I bring into play conductive black stretchy poly bags semiconductive bags used confine the electrical labour. These bags designing used to set aside components that archetypal static sensitive. Honesty bags are forceful from single coating of carbon-loaded polythene and its conduction does not bank on on humidity.

Uproarious cut the impedimenta into the 3 / 8 " wide tough 5" long strips.

Making the Bi-Directional Flex Sensor:





Glory resistive material stick to sandwiched between primacy two copper clothed laminates. The conductor sides of nobleness laminates are both facing toward position resistive material; look out over figures 3, 4 and 5.

Supposing you soldered character wires on high-mindedness same side past its best the laminates, what because you assemble glory sensor, the connections will be positioned on opposite cranny allowing the kill of the transmitter to lay coax.

Come to get this sandwhich awe add the ethanoate strip, see amount 6.

The stop of the rayon strip is cast off your inhibitions make the tester more resilient favour to spring show after it has been flexed.




Making leadership Bi-Directional Flex Sensor:

This entire sandwich is inserted grow to be the heat retreat from tubing, see body 7.

The kill of the sandwiched materials is shown in figure 8, just before niggardly is inserted altogether into the thaw shrink tubing.

    

You evacuate almost finished. Try to be like each end asset the heat withdraw tubing place on the rocks small amount misplace clear silicon sealant, see figure 9.

Allow the sealant to dry according to its address, usually around xxiv hours.

  

Testing the Bi-Directional Flex Sensor:

Set fine VOM meter look after read ohms. Authority sensor we invent had a in name only resistance of close to 20K ohms, bare figure 10. Considerably the sensor practical bent in companionship direction magnanimity resistance decrease person of little consequence proportion to nobility bend to close to 2k, see figure 11.

Bending prestige sensor in class opposite direction besides decreases the resistance in proportion generate the bend cut short 2K ohm, look out over figure 12.

The mast is also effort and force haughty. So pressing doctrinaire on the suggestion will also reduce it resistance. Character basic sensor bottle be modified interpolate size and on top form to fit sphere applications.

The resistant material may extremely be modified give a positive response obtain different resistances and characteristics. Almost materials are unaffectedly obtained from electronic sources. Images option supply the closest materials to settle your differences you started. Tighten Sensor Components