Interface Load cell With 8051

Load cell is a passive transducer or sensor which converts applied force into electrical signals.

• They are also referred to as Load transducers.
• There are many varieties of load cells, strain gauge based load cells are the most commonly used type.
• Load cells use different operating principles.
• 1.Load Cells based on fluid pressure.
• 2.Load Cells based on elasticity.
• 3.Load Cells based on magnetostriction effect or piezoelectric effect.
• Load cell primarily consists of a spring material and strain gauge.
• Spring material causes strain due to applied load and strain gauge changes its resistance in accordance with the change in strain.
• A mechanical arrangement, the force being sensed deforms a strain gauge.
• The strain gauge measures the strain as an electrical signal.
• A load cell usually consists of four strain gauges in a Wheatstone bridge configuration.
• Load cells of one strain gauge (quarter bridge) or two strain gauges (half bridge) are also available.
• The electrical signal output is typically in the order of a few millivolts and requires amplification by an instrumentation amplifier before it can be used.
• The output of the transducer can be scaled to calculate the force applied to the transducer.

Application

• Weight Machine.

Hardware Required

Circuit