Study On The Detect Method To Tension Difference Of Multi-rope Friction Hoister And The Automatic System Of Turning Trough

According to the research actuality of monitoring rope tension difference of multi-rope friction hoister at homeland and abroad, this subject presents a new monitoringmethod—the monitor method to rope tension difference of multi-rope friction hoisterbased on CCD technology.Firstly, this paper analyzes the theory of rope tension difference of multi-rope friction hoister in detail. And then the mathematic model is established which describes the transformation rule between rope tension difference of multi-rope friction hoister and stretch elongate due to it.Secondly, it is analyzed that the feasibility how to detect rope tension difference using video frequency technology. Empolder the system of turning trough. Analyzed the reason of the tension difference detection by using the Mechanics and kinetics theories, designed the powerful adjustment equipment, overcome the abuse of the former equipments, it can complete the action under the control of MCU. The control system made the MCU AT89C52 as the bottom sampling unit, the IPC as the monitor terminal. Making use of Visual Basic design interface, it real-time and on-line showed the status and the deviation distance of every monitoring point. Based on the MSComm of Visual Basic, constructed two distributing control system with RS485 BUS, did half duplex serial communication between the master and the slavers. This is a simple industry local network, the operation is simple, the maintenance convenient. You can know clearly the tension difference of all of the monitoring point by using the interface, it made the management and superintendence easily, realized the management and control as one. Making use of the VisData of Visual Basic to establish the Relation Database and data table for depositing the history record of the deviation value. Set up the data report with the Data Environment and Data report command of VB. You can query or print the history record of the rope tension difference in the software system. the data report make you easy to know the history of the monitor point and is convenient to maintain the mashine of friction hoister.Finally, the rope tension difference detection is tested in the lab. Then the testing result indicates that this method is simple and feasible, and can achieve contactless on-line and real-time measurement.