Using PLC profile car washer is for the "current sensors" to control the brush run track. High-speed rotating brush touches the car behind, the electrical load increases, current sensor receives the signal to the programmable industrial controllers (PLC) to be addressed and fixed that already exist in the PLC program instructions solenoid valve opening the cylinder valve to control the distance between brush and body. Although it also can implementation automatically wash car but exists with many defects, for example: a. due to PLC in the storage of is fixed does not variable of Directive, encountered special models or other situation, cannot accurate recognition; b. due to is relies on current size to control brush of movement, so voltage of does not stability will into has maximum of problem, is not because set of current had large, caused brush from car had near, to on car paint surface caused hurt; is set of current had small, caused brush from car had far, cannot to car wash clean; Also as current sensor sudden damage caused the brush will not lift and accidents.1323 Infrared Themometer
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