Patent ID: 6661351
Filing Date: 2003-12-09
Classification: G08C,H03J

Abstract:
A radio control system having pluralities of transmitters and receivers, whereineach of said transmitters comprises: input means for inputting a command signal in accordance with the user's operation; target designation means for designating target ID information which specifies a target receiver; mode select means for selecting one of plural transmission modes in accordance with the target ID information; and transmission means for transmitting a radio wave signal representing the target ID information and the command signal in accordance with the selected transmission mode, each of said receivers comprises: drive means for receiving the radio wave signal; receiver designation means for designating receiver ID information which specifies said receiver itself; extraction means for extracting the target ID information and the command signal from the radio wave signal received by said reception means; and signal conversion means for discriminating whether the extracted target ID information coincides with the receiver ID information, and for converting the extracted command signal into a drive signal if the coincidence is found; and drive control means for driving said drive means in accordance with the drive signal; wherein said transmission mode designates a cycle for intermittent transmission which differs in accordance with the target ID information, the cycles for intermittent transmissions for different ID information are different with each other, length (CB,CC,CD,CE) of the cycle for each of the intermittent transmission is determined as a product of a predetermined period (PA) and a prime number (5, 7, 11, 13 . . . ), the predetermined period is common to the different ID information, and said transmission means transmits the modulation signal during the predetermined period.