MIDORI sensor

MIDORI sensor

Model: LP-20FB 1K

MIDORI green measuring instrument linear displacement sensor effective electric stroke: 20mmLP-20F (downward): effective electric stroke 20mmLP-20FB (UP): effective electric stroke 20mm, with rear spring size (mm)

Working principle of LP-20F/LP-20FB linear displacement sensor:

Potentiometer type displacement sensor converts mechanical displacement into resistance or voltage output that is linearly or functionally related to it through potentiometer components. Both ordinary linear potentiometers and circular potentiometers can be used as linear displacement and angular displacement sensors, respectively. However, potentiometers designed for measuring displacement require a definite relationship between displacement changes and resistance changes. The movable electric brush of the potentiometer displacement sensor is connected to the measured object.

The displacement of an object causes a change in resistance at the moving end of the potentiometer. The change in resistance reflects the magnitude of displacement, and whether the resistance increases or decreases indicates the direction of displacement. Usually, a power supply voltage is applied to the potentiometer to convert resistance changes into voltage output. The output characteristics of a wire wound potentiometer also exhibit a stepped shape due to the fact that the resistance changes step by step with the turn resistance when the electric brush moves. If this displacement sensor is used as a displacement feedback element in a servo system, excessive step voltage can cause system oscillation. Therefore, in the production of potentiometers, the resistance value of each turn should be minimized as much as possible. Another major drawback of potentiometer sensors is their susceptibility to wear and tear. Its advantages are: simple structure, large output signal, easy to use, and low price.

The magnetostrictive displacement sensor accurately detects the absolute position of the active magnetic ring through non-contact measurement and control technology to measure the actual displacement value of the detected product; The high precision and reliability of this sensor have been widely applied in thousands of practical cases.

Due to the lack of direct contact between the active magnetic ring and sensitive components that determine the location, the sensor can be applied in extremely harsh industrial environments and is not easily affected by oil stains, solutions, dust, or other pollutants. The IP protection level is above IP67. In addition, the sensor adopts high-tech materials and electronic processing technology, so it can be applied in high temperature, high pressure, and high oscillation environments. The sensor output signal is an absolute displacement value, and even if the power is interrupted or reconnected, the data will not be lost, let alone reset to zero. Due to the non-contact nature of sensitive components, even repeated testing will not cause any wear on the sensor, greatly improving the reliability and service life of the detection.

Magnetostrictive displacement sensors use the principle of magnetostriction to accurately measure position by generating a strain pulse signal through the intersection of two different magnetic fields. The measuring element is a waveguide, and the sensitive element inside the waveguide is made of a special magnetostrictive material. The measurement process is carried out by generating current pulses in the electronic chamber of the sensor, which are transmitted inside the waveguide and generate a circular magnetic field outside the waveguide. When the magnetic field intersects with the magnetic field generated by the movable magnetic ring as a position changing ring fitted on the waveguide, a strain mechanical wave pulse signal is generated inside the waveguide due to the effect of magnetostriction. This strain mechanical wave pulse signal is transmitted at a fixed sound speed and quickly detected by the electronic chamber.

Due to the fact that the transmission time of this strain mechanical wave pulse signal in the waveguide is proportional to the distance between the active magnetic ring and the electronic chamber, this distance can be determined highly accurately by measuring the time. Due to the fact that the output signal is a true absolute value, rather than a proportional or amplified signal

Number, so there is no signal drift or variation, and there is no need for regular recalibration.

MIDORI sensor

Model: LP-20FB 1K