The Research On Full Moment Limiter For Automobile Crane

The automobile crane is used widely in agriculture and industry. When an automobile crane is working, the operator must assure that the crane is safe and a certain protection device must be installed to protect the automobile crane.The paper explains the research on the limiter for an automobile crane based on Intel MCS96 serial 16 bits single chip microcomputer. Those parameters are checked in real time while an automobile crane is at work. The data that include the information of weight, length, angle and radius etc. can be displayed on LCD. The red light will be lighted from the LED and the system will alarm or force the machine to stop if the measured moment exceeds the moment of the setting values. The direction is checked in order to judge that the moment is increasing or reducing. The machine will be stopped by force if the crane tends to revolve towards dangerous direction. The crane will work only when it tends to revolve towards safe direction. Also the upward switch of the winding engine can be checked by timer. If the switch is on, the limiter will alarm and stop the machine by force. The limiter can store data that include the value of weight, length, angle, radius and time when the crane is stopped, and also the data can be maintained safely when the power supply is off.The full moment limiter has a module for self-diagnosis. When it does not work normally, the code of error can be displayed on LCD.The full moment limiter has been tested and proved qualified on the spot. It can be adapted to the different serial automobile crane by changing the parameters of software and sensors.