Single point unmanned aerial vehicle electronic scale 5kg CZL601/10KG weighing sensor Youzhongli aluminum sensor

Description :

　　Single point unmanned aerial vehicle electronic scale 5kg CZL601/10KG weighing sensor Youzhongli aluminum sensor:

　　Single point unmanned aerial vehicle electronic scale 5kg CZL601/10KG weighing sensor Youzhongli aluminum sensor:

　　From this, it can be seen that the resistance strain gauge, elastic body, and detection circuit are essential components of the resistance strain type weighing sensor. Below is a brief discussion on these three aspects.

　　1、 A resistance strain gauge is a strain gauge made by mechanically distributing a resistance wire on a substrate made of organic material. One of his important parameters is the sensitivity coefficient K. Let's introduce its significance. There is a metal resistance wire with a length of L, a circular cross-section with a radius of r, an area denoted as S, and a resistivity denoted as ρ. The Poisson's coefficient of this material is μ. When this resistance wire is not subjected to external forces, its resistance value is R: R=ρ L/S (Ω) (2-1). When its two ends are subjected to F force, it will elongate, that is, deform. Assuming its elongation Δ L, its cross-sectional area decreases, that is, its cross-sectional circle radius decreases Δ r. In addition, it can be experimentally proven that the resistivity of this metal resistance wire will also change after deformation, denoted as Δ ρ.

　　2、 Elastic body is a structural component with a special shape. It has two functions. Firstly, it can withstand the external force acting on the weighing sensor, generate a reactive force on the external force, and achieve relative static equilibrium; Secondly, it needs to generate a high-quality strain field (zone), so that the resistance strain gauges pasted in this zone can ideally complete the task of converting strain to electrical signals. Taking the elastic body of a weighing sensor as an example, let's introduce the stress distribution.

　　There is a rectangular cantilever beam with blind holes.

　　The bottom center of the blind hole is subjected to pure shear stress, but tensile and compressive stresses will occur in its upper and lower parts. The direction of the principal stress is tension and compression. If a strain gauge is attached here, the upper half of the strain gauge will be stretched and the resistance will increase, while the lower half of the strain gauge will be compressed and the resistance will decrease. The strain expression of the center point at the bottom of the blind hole is listed below, without further derivation.

　　3、 Detection circuit

　　The function of the detection circuit is to convert the resistance change of the resistance strain gauge into voltage output. Because Wheatstone bridges have many advantages, such as being able to suppress the effects of temperature changes, suppress lateral force interference, and easily solve the compensation problem of weighing sensors, Wheatstone bridges have been widely used in weighing sensors.

　　Due to the sensitivity of the full bridge equal arm bridge and the consistent parameters of each arm, the effects of various interferences are easily offset, so the weighing sensors all use full bridge equal arm bridges.

　　Common Materials

　　The performance of a weighing sensor largely depends on the choice of manufacturing materials. The weighing sensor material includes the following parts: strain gauge material, elastomer material, patch adhesive material, sealant material, lead sealing material, and lead material.

　　Made in China, including force sensors, weighing sensors, various customized sensors, automated force sensors, and industrial explosion-proof weighing sensor modules. As the core component of weighing and force measurement, sensors have strict long-term stability control of 0.03%. Various aluminum weighing sensors, measuring and testing standard force measuring instruments, and small handheld digital force measuring instruments are welcome to inquire by phone;

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