Views:2 Author:Site Editor Publish Time: 2021-02-08 Origin:Site
In normal use, the range of load cell sensor should be selected to consider the measured force value and the weight of auxiliary tools. Generally, the range of weighing load cell sensor is (measurement + tools) ×1.2~1.5 times;
In dynamic use, the range of the load cell sensor is usually 3 ~5 times larger than the measuring force;
Considering that it is necessary to consider the impact of pulse on the weighing load cell sensor when the output of the device is at the maximum, the range of the weighing load cell sensor is more than twice of the overshoot.
The force sensor load cell consists of one or more elastomers which can produce deformation after being stressed, an electric bridge circuit (such as Wheatstone bridge) which can sense the deformation, an adhesive which can fix the resistance strain gauge on the elastomer and conduct the strain, and a sealant which can protect the electronic circuit.
1:Material of the load cell block
Generally, alloy steel is used. Alloy material not only has stiffness to ensure deformation consistency and recovery, but also has good weather resistance and corrosion resistance.
2:Materials of strain gauge and resistance element
The composition of the resistance strain gauge is complex, and it is a composite manufacturing product. The combination of the base material and the strain copper of the strain gauge is ever-changing. Generally, the base material is polymer film material, and the strain material is high-purity constantan. The quality of the resistance strain gauge is not only related to the substrate material and the purity of the composite metal, but also related to the composite process, etching technology and process, etching chemical materials and post-treatment process and materials.
3:Material of adhesive
The adhesive used for resistance strain gauge is mainly two-component polymer epoxy series adhesive. The properties of polymer chemical products are closely related to the physical and chemical indexes of each component.
4:Material of sealant
In the initial stage of force sensors with insufficient welding technology and equipment, special silicone rubber sealant series are used. Silicone rubber has long-term chemical stability, therefore, anti-corrosion, moisture-proof, aging resistance, insulation and other excellent properties.
5:Wire material of load cell
The wire is still a part of the force sensor load cell. The metal material of the force sensor load cell wire, silver plated wire has better conduction effect than copper wire, and copper wire certainly has better conduction effect than aluminum wire. Its role is self-evident.