Abstract:
In order to control automatic working devices, especially soil compacting devices, a remote control device is provided which comprises a transmitter unit which can be actuated by a user and which is used to transmit control signals in the form of electromagnetic radiation and a receiver unit which is arranged on the working device and which outputs the received control signals in the form of electric control commands to the control unit of a working device. During operation of the working device, the transmitter unit can be connected to an external power source, which is arranged on the working device, by means of a cable for the supply of power thereto.
Abstract:
A wireless sensor and control system includes wireless RF transmitter units and one or more receivers that communicate using more than one narrowband radio channel to provide increased reliability in the presence of unintentional radio interference. The output of a sensor transducer or closure of a switch contact can trigger transmissions at two or more narrowband carrier frequencies that are subsequently decoded by the receiver(s). The remote sensor data can then be passed to another system for processing and/or utilized to control remote devices. In accordance with one practical embodiment, the remote sensor data indicates the ingress or egress of monitored product inventory.
Abstract:
A communications system for transmitting and receiving remote control messages in an electronic remote control system. The present communications system uses a remote control message protocol which is particularly suitable for transmitting RF remote control messages with IR remote control messages in a time multiplexed fashion, wherein the RF remote control messages are transmitted during the pause intervals between IR remote control message transmission intervals. The present remote control message protocol includes a start sequence, comprising a MARK pulse and a SPACE of about equal duration, followed by a plurality of data fields. Each data field ends with an End of Field marker and the remote control message ends with an End of Message marker. The plurality of data fields comprises an addressing data field for specifying the destination device, a security code data field for allowing a specific remote control transmitter to control a specific destination device, a status field for specifying various status codes associated with the remote control message, a keycode field for carrying the remote control message payload, and a checksum field for verifying the transmission integrity of the remote control message. A remote control message based on the present message protocol may be expanded to include additional data fields and to expand pre-existing data fields.
Abstract:
A redundant remote control system for use on a continuous miner having a radio remote control system for the remote control of a continuous miner. The radio remote control system having switches, a multiplexer, a radio transmitter, a radio receiver, a demultiplexer, and a radio interface. The redundant remote control system includes a second system for controlling the same continuous miner, and includes a second transmitter, a second multiplexer, a second receiver, and a second demultiplexer. The second system may be a radio, a fiber optic or electrical cable remote control system.
Abstract:
A remote control system includes a mobile device and a receiver connected to a control target. The mobile device includes an input unit accepting user's input operation; an operation signal transmission unit wirelessly transmitting an operation signal corresponding to the input operation during the input operation; a frequency switching determination unit determining whether to switch the transmission frequency band from a first frequency band to a second frequency band based on at least any one of a manner of the input operation and a state of wireless communication; and a transmission frequency switching unit switching the transmission frequency band when the frequency switching determination unit determines to switch the transmission frequency band. The receiver includes an operation signal reception unit receiving the operation signal; and a control unit controlling the control target on the basis of the received operation signal.
Abstract:
PROBLEM TO BE SOLVED: To surely establish communications while preventing an increase in constitution, in a keyless entry system. SOLUTION: A smart portable machine 2 transmits a keyless radio signal for the keyless entry system via two frequency channels (Ch1 and Ch2). In an integrated tuner 4 for receiving the keyless radio signal, a control IC 38 determines the channel Ch, which is in a proper communicating state, of the two channels Ch1 and Ch2, and controls the frequency (signal frequency for conversion) of a signal, input into a mixer 28 from a PLL circuit 36, to a frequency for converting the keyless radio signal for the determined Ch into an intermediate frequency signal. This enables the common use of a circuit for receiving the keyless radio signals for the channels Ch1 and Ch2, and enables the communication to be surely established by receiving the keyless radio signal for the channel Ch in the proper communicating state. COPYRIGHT: (C)2008,JPO&INPIT