Force Sensors

Discussion in 'General Electronics Chat' started by Michael Lin, Sep 26, 2005.

  1. Michael Lin

    Thread Starter Member

    Sep 20, 2005
    Dear All,
    I wish to place a force sensor at the end of a stick, push it laterally towards an object and measure the force of impact. Which type of the force sensors is the most appropriate? The desired range of force is up to 2 N and the sensitivity is hopefully up to 2 or 3 digits after the decimal point in Newtons.

    Also, preferably the surface area in contact for force measurement is as small as possible as the force is to mimic a point force at the center of mass. However this is just an additional condition.

    This is just a question of personal interest. What is the major difference between a Force Sensor and a Pressure Sensor?

    Also, after acquiring this force sensor, is there any simple way of displaying the force, besides voltage reading from the output of the sensor?

    Thanks for your help,
  2. Erin G.

    Senior Member

    Mar 3, 2005
    There is no real difference that I'm aware of between force / pressure, other than the way you display the results, ie PSI, Newtons, inchPound/Torque, etc. Red Lion (and several other companies) makes alot of different models of displays that can be configured to read just about anything you want them to. I would Google "load cell" for your force measuring device. Find an appropriate model load cell, and a display to go with it. The displays usually use 120VAC, but you'll probably also need a 24VDC power supply for your load cell. Most load cells consist of four resistors in a bridge (similar to a rectifier configuration) with an excitation voltage across two points, and an output signal across the other two points. I've seen them in both votage and mili-amp output models. The output feeds into your dispay device and reads the numbers you've you've configured & calibrated it to.

    Hope this helps.