barcode scanner vb.net textbox Phototransistor LED in Software

Generation DataMatrix in Software Phototransistor LED

Phototransistor LED
Reading DataMatrix In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Generate Data Matrix 2d Barcode In None
Using Barcode generator for Software Control to generate, create Data Matrix 2d barcode image in Software applications.
FIGURE 35.3 An infrared LED and phototransistor pair can be added to the fingers of a gripper to provide go/no-go grasp information.
ECC200 Reader In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
Create Data Matrix 2d Barcode In C#.NET
Using Barcode creation for .NET Control to generate, create Data Matrix ECC200 image in .NET applications.
560 ADDING THE SENSE OF TOUCH
DataMatrix Encoder In Visual Studio .NET
Using Barcode generator for ASP.NET Control to generate, create Data Matrix image in ASP.NET applications.
Print ECC200 In Visual Studio .NET
Using Barcode creation for VS .NET Control to generate, create Data Matrix 2d barcode image in .NET framework applications.
R1 270
Encode ECC200 In Visual Basic .NET
Using Barcode encoder for VS .NET Control to generate, create ECC200 image in Visual Studio .NET applications.
Code 128A Encoder In None
Using Barcode printer for Software Control to generate, create Code-128 image in Software applications.
R2 10K To comparator, amplifier, A/D converter, etc.
Bar Code Creation In None
Using Barcode generator for Software Control to generate, create bar code image in Software applications.
USS-128 Maker In None
Using Barcode printer for Software Control to generate, create UCC-128 image in Software applications.
LED1
Drawing European Article Number 13 In None
Using Barcode encoder for Software Control to generate, create EAN / UCC - 13 image in Software applications.
Data Matrix 2d Barcode Creator In None
Using Barcode encoder for Software Control to generate, create Data Matrix ECC200 image in Software applications.
Infrared filter
GTIN - 12 Creation In None
Using Barcode maker for Software Control to generate, create UPC - E0 image in Software applications.
Reading UPC-A Supplement 5 In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
FIGURE 35.4 The basic electronic circuit for an infrared touch system. Note the infrared filter; it helps prevent the phototransistor from being activated by ambient light.
Code39 Encoder In None
Using Barcode generator for Font Control to generate, create Code39 image in Font applications.
Read UPC A In VB.NET
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in VS .NET applications.
the object. The sensor is connected to a converter circuit, or in some cases a servo circuit, to control the amount of pressure applied to the object. Pressure sensors are best used on grippers where you have incremental control over the position of the fingers or pinchers. A pressure sensor would be of little value when used with a gripper that s actuated by a solenoid. The solenoid is either pulled in or it isn t; there are no in-between states. Grippers actuated by motors are the best choices when you must regulate the amount of pressure exerted on the object.
Code 3 Of 9 Scanner In VS .NET
Using Barcode recognizer for .NET Control to read, scan read, scan image in .NET framework applications.
Code 39 Full ASCII Drawer In Java
Using Barcode generator for Android Control to generate, create Code-39 image in Android applications.
CONDUCTIVE FOAM
Making UCC - 12 In Objective-C
Using Barcode encoder for iPad Control to generate, create GS1-128 image in iPad applications.
Generate USS Code 39 In None
Using Barcode encoder for Online Control to generate, create Code 39 Full ASCII image in Online applications.
You can make your own pressure sensor (or transducer) out of a piece of discarded conductive foam the stuff used to package CMOS ICs. The foam is like a resistor. Attach two pieces of wire to either end of a one-inch square hunk and you get a resistance reading on your volt-ohm meter. Press down on the foam and the resistance lowers. The foam comes in many thicknesses and densities. I ve had the best luck with the semistiff foam that bounces back to shape quickly after it s squeezed. Very dense foams are not useful because they don t quickly spring back to shape. Save the foam from the various ICs you buy and test other types until you find the right stuff for you. Here s how to make a down-and-dirty pressure sensor. Cut a piece of foam 1/4-inch wide by 1-inch long. Attach leads to it using 30-gauge wire-wrapping wire. Wrap the wire through the foam in several places to ensure a good connection, then apply a dab of solder to keep it in place. Use flexible household adhesive to cement the transducer onto the tips of the gripper fingers. A better way is to make the sensor by sandwiching several pieces of material together, as depicted in Fig. 35.5. The conductive foam is placed between two thin sheets of copper or aluminum foil. A short piece of 30 AWG wire-wrapping wire is lightly soldered onto the foil (when using aluminum foil, the wire is wound around one end). Mylar plastic, like the kind used to make heavy-duty garbage bags, is glued on the outside of the sensor to provide
MECHANICAL PRESSURE SENSORS 561
Mylar sheet
Foil
Conductive foam
Outputs Foil
Mylar sheet
FIGURE 35.5 Construction detail for a pressure sensor using conductive foam. The leads are soldered or attached to foil (copper works best). Choose a foam that has a good spring to it.
electrical insulation. If the sensor is small and the sense of touch does not need to be too great, you can encase the foam and foil in heat-shrink tubing. There are many sizes and thicknesses of tubing; experiment with a few types until you find one that meets your requirements. The output of the transducers changes abruptly when they are pressed in. The output may not return to its original resistance value (see Fig. 35.6). So in the control software, you should always reset the transducer just prior to grasping an object. For example, the transducer may first register an output of 30K ohms (the exact value depends on the foam, the dimensions of the piece, and the distance between wire terminals). The software reads this value and uses it as the set point for normal (nongrasping) level to 30K. When an object is grasped, the output drops to 5K. The difference 25K is the amount of pressure. Keep in mind that the resistance value is relative, and you must experiment to find out how much pressure is represented by each 1K of resistance change. The transducer may not go back to 30K when the object is released. It may spring up to 40K or go only as far as 25K. The software uses this new value as the new set point for the next occasion when the gripper grasps an object.
Copyright © OnBarcode.com . All rights reserved.