Features of pull-wire sensors and precautions for selection

The characteristics of the pull-wire sensor and the matters needing attention in the selection are introduced in two parts, the characteristics of the pull-wire sensor and the matters needing attention in the selection of the pull-wire sensor item.

First introduce the characteristics of the cable sensor.

The composition of the pull-wire sensor: the pull-wire displacement sensor/encoder, also known as the pull-wire displacement sensor, is divided into two parts, the mechanical part and the electronic part; the electronic part

Generally, it is a photoelectric encoder; the mechanical part is mainly composed of steel wire rope, wire drum, spring and pipe hoop.

The measuring principle of the pull wire sensor: the wire rope is always tightened by the spring, and the linear displacement of the wire rope is converted into the measurement of the rotation amount.

The characteristics of the pull-wire sensor: the wire rope is tightly wound on the multi-turn measuring wheel, and the stroke of each turn is the same, so it is linear measurement in the entire measurement range. Wire rope test

The measuring wheel and the coil spring wheel are coaxially linked with the sensor to minimize the connection error. In general, the wire-pull sensor is connected to the object to be measured softly through a wire rope, so

Excellent anti-vibration performance; easy installation, can adapt to harsh environments.

Secondly, from the characteristics of the cable sensor above, it can be found that the selection of the cable sensor needs attention: range, output mode, accuracy....

Range: Generally, the range of the cable sensor can reach 200mm~30000mm, and the maximum stroke cannot be exceeded in the application of the cable displacement sensor.

(Pull out 30 meters from the original rope clamp), do not loosen the original rope clamp of the rope outlet, otherwise it will damage the sensor.

The signal of the rope displacement sensor can be divided into incremental and absolute value. The output signal of incremental pull-wire encoder is mainly square wave output, and there are 6 signal outputs: A,B, Z, /A, /B, /Z; the stroke can be up to 30 meters, the linear accuracy can be up to 0.01%, and the resolution can be up to 0.001 mm/pulse depending on the configuration Rush.

The output signal of the absolute cable encoder can be RS485, CANOPN, PROFIBUS-DP, PROFINET serial SSI and resistance signal, etc...