The utility model relates to belt scale technical field, and disclose a kind of high-precision raw
coal weighing drag belt scale, including belt body,
pulley and along the
laser displacement sensor of installation direction,
infrared opposite emission sensor,
pulley groove wall is equipped with trigger
assembly.Trigger
assembly contains
assembly cylinder, moving disc, moving disc is slidably matched with assembly cylinder guide groove anti-rotation by guide seat, and it is equipped with telescopic spring and connecting cylinder between assembly cylinder, outside is connected contact plate by support roller, and contact with belt side wall;Inside contact lever corresponds piezoresistive sensor, pressure
signal is transmitted by
wireless unit, contact plate and belt stable contact, spring is in initial state;When belt is offset, contact plate is driven moving disc sliding by force, contact lever triggers piezoresistive sensor, offset data of
laser displacement sensor is transmitted to monitoring center by
wireless unit, avoid raw
coal uneven distribution by correcting offset, monitor tension balance prevents conveying speed fluctuation, reduce vibration influence, comprehensively improve raw
coal weighing accuracy.