Industrial measurement includes many, including industrial measurement is very important to the application of the weighing sensor, weighing sensor as electron weighing apparatus of the detection element, direct response measured variable which is quality, and convert it to suitable for measuring the electrical signals, let below small make up on detailed introduction.
According to the principle of transformation is different, can be divided into electric resistance strain type weighing sensors, inductive, capacitive and magnetic pressure type, a variety of types such as piezoelectric and vibration frequency. However, the most widely used or resistance strain type weighing sensor, a total of scope of application is very wide, can feel the 1 g under load, than can measure the weight of more than 100 tons.
Resistance strain weighing sensor is made up of resistance strain slice and paste on the metal elastic element. Made of elastic element USES aluminium alloy or alloy steel and the structure has a pillar, ring type, cantilever beam, a variety of types such as hub and spokes, can choose according to the needs of measurement and design. Resistance strain gauge is a kind of can be test pieces of the dependent variable of the sensitive element of its conversion into resistance based on the principle of the resistance strain effect of metal or a semiconductor piezoresistive effect (the latter called semiconductor strain gauge).
Is generally used in the field of weighing sensor technology is based on resistance strain effect and made of metal foil strain gauge. Actual use, the use of very strict process will resistance strain gages elastic element substrate and sensor firmly stick together. Measured under the action of gravity when elastic elements in order to produce elastic deformation resistance strain gauge will have the same strain with elastic element, then making above the substrate metal foil gate resistance due to the strain resistance change. The resistance of the resistance strain gauge relative variation and strain is proportional.
