Abstract
To lessen operation errors in case of machine start or stop operating, the predictive information system is considered. That is, before actuator's start/stop, its predictive sign is informed to the operator by this system, it is helpful for operators to do more precise operation. This system is applied to the boom tilt operation of the rough-terrain crane. Its motion prediction is assumed by sensing its actuator's hydraulic pressure change. This pressure sensor signal is transformed to the sound information so as to transmit its prediction to the operator. This sound volume and frequency are varied in accordance with its pressure signal. Two professional operators have tried the tilt operation test, this system has lessened operating errors on account of the assistance of the start/stop timing recognition.
