strain gauge load cell (industrial measurement)
TRANSCRIPT
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STRAIN GAUGE LOAD CELL
Prepared ByKetan Nayak (140413117005)Harsh Parmar(140413117006)
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INDEXSr No TITLE
1. INTRODUCTION
2. TYPE OF LOAD CELLS
3. STRAIN GAUGE LOAD CELL
4. APPLICATIONS
5. LIMITATIONS
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INTRODUCTION• Measurement of Weight is an act Performed by our
Ancestors and still it is Performed in our day to day Life.
• Technology also had Taken a Leap in these Years .
• We have Advanced from To•
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LOAD CELL• When we hear about Load Cell One thing that comes
into mind is Weight Measurement and the Pointer scale we used in our Earlier Times.
• But now the Question is “What is a Load Cell” ?Load Cell is a Device or an Instrument which Converts the Quantity of Force Applied over it to the Electrical Signal Form.
• There are Many Types of Load Cells Available in Market these Days.
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TYPES OF LOAD CELL
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ROLE OF STRAIN GAUGE • Strain Gauge acts as the Transducer in the
Strain Gauge Load Cell.
• We can also Say that the Strain Gauge is the Heart of this Load Cell.
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STRAIN GAUGE LOAD CELL
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WORKING• The principle of operation of the Strain Gauge load cell is based on
the fact that the resistance of the electrical conductor changes when its length changes due to stress.
• Cu Ni alloy is commonly used in strain gauge construction as the resistance change of the foil is virtually proportional to the applied strain.
• The change in resistance of the strain gauge can be utilized to measure strain accurately when connected to an appropriate measuring circuit.
• A load cell usually consists of four strain gauges in a Wheatstone bridge configuration.
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• The electrical signal output is typically very small in the order of a few millivolts.
• It is amplified by an Instrumentation amplifier before sending it to the measurement system.
• The output can be Digital or Analog (0-5V) depending on the application.
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APPLICATIONSEngineering•Test Rig Force Monitoring•Strain Gauging of Components•Robotic_Weighing of components•Specialized Load cells•General weighing•Machine control•Repair & Calibration
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LIMITATIONS1. Calibration is a Tedious Procedure.
2. Mounting Can be Difficult in some Cases.
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