| 摘要 |
PURPOSE:To avoid an inconvenience in an operation due to the radio interference of a radio wave by selecting first and second carriers of a transmitter side by an operator, including and transmitting effective data for every carrier, thereby, searching the effective data in a receiver side and operating the machine equipment of the crane according to an instruction signal included in the carrier. CONSTITUTION:The operating level of the machine equipment of the crane is set to an analog multiplexer 1 according to the operation of the signal commanders C1-C5 of the operator and inputted to a CPU 3 through an AD converter 2. This CPU 3 transmits the first carrier at the time of turning off a switch 3a from an antenna 5a through a digital modulating circuit 4 and a transmission circuit 5 and transmits the second carrier at the time of turning on the switch 3a. The command signal is mounted on the carriers respectively and transmitted. A signal from this transmitter is received in a receiving circuit 6, demodulated by a digital demodulating circuit 7, a solenoid driver 9 is controlled by a CPU 8 command signal to operate the crane.
|
