SENSOR PAD SYSTEM FOR WEIGHER OF AXLE WITH FUNCTION OF AUTOMATIC MEASUREMENT

摘要

PURPOSE: A sensor pad system for a movable axle-load measuring device with an automatic measurement function is provided to reduce the weight of a sensor pad by using a strain gauge. CONSTITUTION: A sensor pad system for a movable axle-load measuring device with an automatic measurement function includes a sensor pad and a smart terminal (200). The sensor pad is composed of a body unit of a light metal material, a strain gauge (120), and a circuit unit (130). The body unit includes a dummy pad unit, one or more first receiving units, a second receiving unit, and a stopper. A resistance value of the strain gauge is changed by the deformation of the body unit. The circuit unit includes a resistance measuring unit which applies a fixed voltage to the strain gauge and receives and outputs a voltage change value in respect to the changeable resistance value; an amplifying unit (132) amplifying the voltage change value into a predetermined level; a filter unit (133) removing noise signals in the amplified voltage change value; a first communication unit (135) composed of an integrated delta-sigma A/D conversion unit (134) and a wireless communication module; a first control unit (136); and a power unit (150). [Reference numerals] (120) Strain gauge; (131) Resistance measuring unit; (132) Amplifying unit; (133) Filter unit; (134) Integral A/D conversion unit; (135) First communication unit; (136) First control unit; (150) Power unit; (210) Second communication unit; (220) Third communication unit; (230) Input unit; (240) Camera unit; (250) Unit for generating measured data; (260) Barcode generating unit; (270) Display unit; (280) Second control unit