VIBRATION AND DISPLACEMENT SENSOR Russian patent published in 2010 - IPC G01H3/00 G01H9/00 

FIELD: physics.

SUBSTANCE: sensor has a cylindrical case which is rigidly joined by the lower base to the surface of the monitored object and a cylindrical inertial element placed coaxially in the case. The case is transparent and is filled with liquid and sealed off. The inertial element, which is immersed in the liquid and is in a suspended position, has conical ends of equal length. The light source and receiver are made in form of three pairs of diodes emitting in the infrared region and receving photodiodes which are fitted for covering the infrared radiation with the conical ends, where the said infrared radiation passes from the emitting diodes to corresponding receiving photodiodes on the outer surface of the case diametrically opposite each other. The first and second pairs of emitting diodes and receiving photodiodes are fitted higher than the top of the corresponding lower and upper cones which form lower and upper conical ends of the inertial element by 10% of the height of the said cones for detecting vibrations. The third pair of emitting diode and receiving photodiode is fitted higher than the second pair for detecting displacements. The emitting diodes and receiving photodiodes are connected to a unit for controlling and detecting vibrations and displacements.

EFFECT: increased reliability, accuracy, efficiency of operation of the sensor, reduced weight, overall dimensions and simplification of the design of the sensor.

2 cl, 6 dwg