VO FILM-BASED LINEAR DISPLACEMENT SENSOR Russian patent published in 2015 - IPC G01B11/00 

FIELD: physics.

SUBSTANCE: linear displacement sensor comprises a light source and a substrate. The latter has two straight scales in the form of a first and a second row of strips divided by a common conducting plane. The strips are made of a material with a hysteresis resistance-temperature relationship. The rows of strips are displaced from each other by one strip. Each of the latter has a signal output. On the other side of the substrate there is a film-type heater and a film-type thermocouple. Heat-sensitive strips are connected to an analogue switch which enters the interface of the of a measurement system. The height of the light radiation strip is equal to the vertical dimension of double the scale made from heat-sensitive strips. The substrate is placed in a sealed chamber with a transparent side wall, on the upper and lower faces of which there are protrusions with longitudinal grooves. A radiation source is mounted on a moveable carriage, which is able to move on the grooves of the protrusions through spheres in said grooves, which are attached to the upper and lower faces of the carriage.

EFFECT: high measurement accuracy owing to mechanical linkage of the sensor with the observation object, obtaining a compact structure which can be used independently in field conditions.

3 cl, 4 dwg