NSE2001 piezoelectric strain sensor manufacturerPiezoelectric strain sensors are sensors used to measure dynamic surface deformation. The sensor is equipped with electronic components and connectors of type 10-32ONF.

NSE2001 piezoelectric strain sensor manufacturerIntroduction

What is strain?

The measured physics is a relative measure of strain ε, defined as the change in length of a part of the machine under load divided by the original length l0.

If the size increases, it is called positive strain (or tensile strain), otherwise it is called negative strain (or compressive strain). The measured ε is dimensionless, meaning it is a physical quantity without a unit. In the International System of Units, strain ε is used as a relative measure, with its unit being meters per meter, [m/m]。 We use μ ε as the unit of relative strain, with 1 μ ε=1 microstrain=10-6m/m=1 μ m/m.

Positive strain shear strain

Any component that is stretched or compressed longitudinally will experience transverse strain. The shear strain is usually about 30% of the positive strain in the other direction. For example, if a component is compressed in the longitudinal direction and stretched in the transverse direction. Depending on the application, this effect can be utilized to measure shear strain instead of measuring forward strain.

Reasons for using strain sensors

Strain sensors are mainly used to measure the deformation of a structural surface. However, throughout the entire process of applying force, the mechanical load-bearing structure will experience tensile or compressive strains that are greater or smaller than the required force. Strain sensors can also effectively indirectly measure dynamic and quasi-static forces.

Compared to direct force measurement, indirect strain measurement has lower sensitivity, but in most cases, the relationship between force and strain is linear, effectively meeting accurate measurement and monitoring requirements. In addition, when using strain for indirect measurement, the force distribution can approach 99%, while when measuring directly, the force distribution is less than 10%.

characteristic

High measurement sensitivity and allows for strain measurement on hard structures or in situations involving small forces.
Low acceleration sensitivity, also suitable for measuring moving parts.
Easy installation, only one M6 hex socket screw is needed.
Symmetrical measurement ranges for tensile and compressive strains, etc.

Application
Process monitoring of intermediate forces, such as pressing, curling, welding, bonding, stamping, precision punching, deep stamping, embossing, etc.
Monitoring the process of applying high force to the press, such as in forging and vehicle production.
● Machine tool monitoring, etc.

Structural composition

A、 Mechanical structure, used for cyclic stretching or compression.
B、 The two contact feet (yellow area) of the strain transmitter transmit the strain of the structure to the main body of the sensor and the piezoelectric element through friction to measure the shear force.
C、 Piezoelectric measuring elements generate charges proportional to the applied shear force.
D、 The sensor housing or body, similar to a spring, converts strain into proportional force.