STRAIN GAUGE Russian patent published in 2013 - IPC G01B7/16 G01L1/22 

FIELD: mining.

SUBSTANCE: strain gauge is proposed, which includes a housing in the form of a sleeve with a central hole, on outside surface of which and on the plate from the same material there arranged are active and compensation resistance strain gauges, which are connected to each other as per a bridge diagram, the arms of which have equal electric resistances, a protective casing, in addition, it is equipped with an independent power supply, a set of light-emitting diodes included in composition of the electronic circuit that connects to the network this or that light-emitting diode of the set depending on the bridge resistance. In addition, the electronic circuit includes a Wheatstone bridge consisting of strain gauges, an instrument amplifier, a unit of comparators, a setting device, an indication unit, a timer feeding device, by means of which ignition of a light-emitting diode from the indication unit is provided, which corresponds to load interval.

EFFECT: providing visual monitoring of load on anchors by means of independent sensors that do not require a secondary instrument, functioning in the monitoring network without loss of a function of visual monitoring.

2 cl, 3 dwg