The load cell is a device that converts the quality signal into a measurable electrical signal output. In the basic concepts and evaluation methods of the main technical indicators of load cells, there are qualitative differences between the old and new national standards. There are mainly S type, cantilever type, spoke type, plate ring type, bellows type, bridge type, column cylinder type and so on.
When it comes to weighing sensors, many people think that they are just sensors that measure the weight of objects. In fact, this is not entirely correct. It has also been applied in many fields. The load cell is similar in principle to the previously introduced pressure sensor, but their shape is different. The load cell used in modern science and technology industry is ubiquitous. The following editor will introduce the working principle and definition of the load cell.
Load cell definition
load cell is a device that converts quality signals into measurable electrical signals. In the basic concepts and evaluation methods of the main technical indicators of load cells, there are qualitative differences between the old and new national standards. There are mainly S type, cantilever type, spoke type, plate ring type, bellows type, bridge type, column cylinder type and other styles.
The working principle of load cell
The working principle of load cell has two basic structure types: linear type and rotary type (disc type). The load cell is composed of a sliding scale and fixed length (linear type) that can move relatively or a rotor and stator (rotating type). of. These two types of weighing induction synchronizers are manufactured using the same process.
The load cell first uses an insulating erecting agent to glue the conductive copper foil (thickness 0.04~0.05mm) on the substrate of non-magnetic material such as low carbon steel or glass, and then according to the design requirements, use photolithography or chemical corrosion process The copper foil is etched into plane windings with different zigzag shapes, which are generally called printed circuit windings. The fixed length and sliding scale, the distribution of windings on the rotor and stator are different. The windings on the fixed length and rotor are continuous windings, and the windings on the sliding scale and stator are segmented windings. The segment windings are divided into two groups, which are arranged in a space with a difference of 7r to the left. The working principle of the load cell is also called sine and cosine windings.
The continuous winding and the segment winding of the induction synchronizer are equivalent to the primary winding and the secondary winding of the transformer, and work by the principle of alternating electromagnetic field and mutual inductance.
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