Are usually the Force Sensors And How Are They Used
According to Wikipedia, the general definition of a transducer is a device that converts an applied energy directly into another type of energy. The force sensor is a particular regarding transducer that converts physical force (that results within a strain or deformation) into electrical energy. Other words for force sensor (in addition to force transducer) are strain cell, strain gauge, touch sensor or load cell.
Such force transducers have wide application from load cells that measure static and dynamic forces of 100s or even 1,000s of kilo-newtons in building structures, to the force sensitive resistor (FSR) in which detect minute pressures used typically in concealed pad security alarms
There are basically three types of transducer in accordance use today. The common is the strain gauge resistor that when physically stressed axially, will change its electrical resistance in direct proportion to the applied force. This minute change of resistance can be measured by modern electronic circuitry to give be sure you output signal that is calibrated in load breast size.
It is normal to prepare 4 such strain resistors a square and bond them to a rugged load cell body (usually stainless steel) that deforms with a force in one direction. Two corners of square of strain resistors are aligned next to the axis of the applied force. This arrangement gives more reliable and better readings along the axis. The resistors are wired in series into a ring and two corner nodes are wired into an electricity source thus forming a whetstone bridge resistance measurement circuit.
The applications of force load cells are legion right now there are a number of specialised load cells available. The pancake load cell what food was in the heavyweight end of the range and they have a low-profile compact and rugged construction. Lots of found in testing laboratories' tensile and compression testing machines, set in large derricks and in structural foundations. May be the used to measure not only the static loading, but the dynamic load with frequencies of of up to 6 kHz. It has great significance for fatigue testing where typically up to 109 cycles could be simulated without the load cell malfunctioning. The other application is to monitor seismic or subsidence induced forces and assess the performance of the structures at critical details.
At the medium scale, the compression load cell and 'S' (or 'Z' load) cell can be used similar applications including structural component monitoring, automotive crash testing and mobile crane load measurement and alarms. At great end of the force load cell range is the beam load cell used typically minor and personal material test machines, industrial load monitoring and measurement and lots other uses.
Two variations with the force load cell are the static and dynamic torsion load cells. Distinctions between between them are that the first measure small angular strains (less than one revolution) and disorderly measure rotating shaft torque on a constant basis. Applications, too imagine, centre round both static industrial rotating machinery and transportation power pursuing.
The second sort of force sensor will be the FSR at the miniature end of force measurement is applied in both domestic and laboratories where measurement in grams or even micro-grams is required. They operate on the basis of the changing resistance of some time amount of dielectric fluid within a wafer pouch of conductor.
The third type of force sensor is the strain gauge based on the piezoelectric force. When certain materials such as some crystals are stressed, an electrical potential difference is induced at two points of the crystal. When connected up into an electronic digital circuit, the current can be measured very accurately and converted into force or stain dimension. This phenomenon is repeatable indefinitely and therefore applications for highly accurate micro and macro strain and force measurement abound.Visit:-http://forcesensor.co.uk/