Crane Stroke Detection And Alarm

Because of the large span between marine gantry crane, it requirements that regid leg andsoft leg cart walk not only keep smooth operation, but also regid legs and soft leg walk strictlycontrolled in allowing synchronicity, within the scope of the car just to avoid regid leg andsoft leg from the difference between travel too large, cause the distortion of the car. In order toguarantee the project two rail type gantry crane rail cart synchronous motor running, controlsystem has the corresponding detection unit, but in the actual operation of the detectiondevice or existence accumulative total error, or it can’t work in dust, high low temperature andthe car running appeared in the process of the bad environment vibration long-term,so themeasuring accuracy can not reach the engineering requirements. In order to improve theposition detection accuracy, avoid gantry crane car during walking, soft leg not justsynchronous, can cause excessive spacing in the leg distortion problem, this paper presents anew design.It firstly introduces gantry crane stroke measurement of the overall design and the alarmthoughts, and system composition diagram. Absolute value is given based on the location ofthe encoder testing system, and based on rfid position detection correction system solutions.Through this device of the real-time detection, correct the car just legs and soft leg ofmovement, the assessment will be sent to master control system, through data processing canjudge whether the deviation between the legs in error permitted range, if abnormality shouldimmediately be alarm, serious beyond the range of allowable error can be when stopimmediately, lest produce an accident.Paper completed gantry crane position detection and alarm system hardware design.Complete the center of it based on single chip processing system, based on the location of theabsolute value of the encoder detection system, and based on rfid position detection correctiondetailed design of the system are introduced, the principle diagram and the PCB figure, andposition detection circuit and center processing system components and chip equipment. Todesign the absolute value of the encoder used in and rfid technology are described in detail.Software design and implementation completed the gantry crane travel detection andalarm system. In the KEIL C environment, through the single-chip microcomputer controlencoder to test the car just, soft leg track on the position, through reading and writing sensorand control IC card of the communication between, at a predetermined position m forcorrection. Through serial communication and extended to realize the data to transmit and receive, at last, the paper introduces the LCD module software design programming methods,realize the firm soft, legs, and position display and alarm, etc.Finally in the realization of hardware and software are conducted, based on systemcommissioning, the experimental results prove that the device realized regid legs and soft legposition detection and stable operation can be measured in the position of the range ofallowable error. So the system for Marine gantry crane safe operation has an importantsignificance.