# US 7,956,718 B2 · Remote control and monitoring of barrier operators with radio frequency transceivers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,956,718 B2 - Document ID: US7956718B2 - Status: Granted - Kind: B2 - Application number: 11/301,584 - Filed: 2005-12-13 - Published: 2006-06-22 - Granted: 2011-06-07 - Earliest claimed: 2004-12-16 - Assignees: Overhead Door Corporation - Inventors: Larry D. Murphy; Brian M. Yackey; Grant B. Carlson - Web page: https://patentgrep.com/patent/US7956718B2 ## CPC - G05B 19/042: using digital processors (G05B19/05 takes precedence) - E05F 15/40: Safety devices, e.g. detection of obstructions or end positions - E05F 15/74: using photoelectric cells - E05F 15/77: using wireless control - G07C 9/00182: {operated with unidirectional data transmission between data carrier and locks} - E05F 15/00: Power-operated mechanisms for wings (motor-operated accessories in locks for completing closing or initiating opening of a wing E05B17/00) - E05Y 2400/354: End positions - E05Y 2400/51: of position, of back drive - E05Y 2400/822: Light emitters, e.g. light emitting diodes [LED] - E05Y 2900/106: for garages - G05B 2219/25186: Bluetooth® - G05B 2219/2628: Door, window - G07C 2009/00793: {by Hertzian waves} - G07C 2009/00928: {for garage doors} - G07C 2209/62: Comprising means for indicating the status of the lock - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) - E05F: DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING - G07C: TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE - E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF ## Abstract Low cost, low power consumption radio frequency transceivers are incorporated in barrier operator control systems for transmitting signals between an operator control unit, one or more remote control units, a diagnostic or calibration device and an obstruction detector. Similar detector devices, including such transceivers, may be employed in loading docks for detecting the status of dock levelers and vehicle restraint devices. Radio frequency communication eliminates the need for hard wiring and also provides for transmission of commands and status information between various control units. ## Claims ### Claim 1 In a barrier operator system for moving a barrier between open and closed positions, a motor operably connected to a mechanism connected to said barrier, a base controller operably connected to said motor and operable to receive signals from barrier position limit detection means, and at least one remote control unit operable for wireless communication with said base controller, the improvement characterized by: said base controller includes an RF base transceiver and said at least one remote control unit includes an RF remote transceiver for communicating with said base transceiver, said remote control unit including status indicator means operable to indicate the status of said barrier as being one of open, opening, closed, closing, and obstruction detected in response to receiving signals from said base transceiver by way of said remote transceiver; an obstruction detector including a detector transceiver for communicating obstruction detection signals to at least one of said base transceiver and said remote transceiver; and a power controller switching said obstruction detector between a power consumption mode and a low power consumption mode; wherein said detector transceiver receives wireless control signals from at least one of said base transceiver and said remote transceiver, and activates said power controller upon receipt of said wireless control signals. ### Claim 2 (depends on 1) The system set forth in claim 1 wherein: said status indicator means includes at least one visual indicator. ### Claim 3 (depends on 2) The system set forth in claim 2 wherein: said visual indicator includes a first visual indicator for indicating that said barrier is one of open, opening and obstruction detected and a second visual indicator for indicating that said barrier is closed. ### Claim 4 (depends on 2) The system set forth in claim 2 wherein: said visual indicator includes a display for displaying a signal indicating one of said conditions. ### Claim 5 (depends on 1) The system set forth in claim 1 wherein: said at least one remote control unit includes control switch means for causing a signal to be transmitted from said remote transceiver to said base transceiver for commanding a change of state of said barrier. ### Claim 6 (depends on 1) The system set forth in claim 1 including: a wall mountable remote control unit including a transceiver for communicating RF signals between said base transceiver and said wall mountable control unit, and a control switch associated with said wall mountable control unit for commanding said base controller to change the state of said barrier. ### Claim 7 (depends on 1) The system set forth in claim 1 wherein: said transceivers are operable to transmit signals via an RF frequency in a range within a 315 MHZ frequency band. ### Claim 8 (depends on 1) The system set forth in claim 1 wherein: said transceivers are operable to transmit signals via an RF frequency range within a 915 MHZ frequency band. ### Claim 9 (depends on 1) The system set forth in claim 1 including: said obstruction detector detects an obstruction in a path through which said barrier may move from an open position to a closed position, said obstruction detector including a detector transceiver for communicating RF signals to at least one of said remote transceiver and said base transceiver indicating the detection of an obstruction in said path. ### Claim 10 (depends on 1) The system set forth in claim 1 including: a barrier status detector including a transceiver for relaying signals between said base transceiver and said remote transceiver. ### Claim 11 (depends on 1) The system set forth in claim 1 wherein: said obstruction detector includes means operable to be placed in the power consumption mode for transmitting signals to said base transceiver in response to a signal sent from at least one of said base transceiver and said remote transceiver to move said barrier between open and closed positions. ### Claim 12 (depends on 1) The system set forth in claim 1 including: a diagnostic and calibration control unit including a transceiver for communicating with at least one of said base transceiver, said remote transceiver, a transceiver of a wall mountable control unit and a transceiver of an obstruction detector. ### Claim 13 (depends on 1) The system set forth in claim 1 wherein: said base transceiver is configured for communication with one or more of said remote transceiver, an obstruction detector transceiver, and a relay transceiver, over a local communication network by sending between said transceivers data packets, half duplex and enabled by said transceivers. ### Claim 14 (depends on 13) The system set forth in claim 13 wherein: said transmissions between said transceivers include a protocol selected from a group consisting of ZigBee, Blue Tooth and WIFI protocols, respectively. ### Claim 15 In a movable barrier operator system including a base controller having a radio frequency base transceiver and a remote control unit for controlling movement of said barrier, said remote control unit including a radio frequency remote transceiver operable to communicate with said base transceiver, a method including the steps of: communicating a wireless control signal from said remote transceiver to said base transceiver instructing said operator system to change the state of said barrier by either one of opening said barrier or closing said barrier; said base transceiver, upon receiving said wireless control signal, causing said base controller to either open or close said barrier; transmitting a wireless status signal from said base transceiver to said remote transceiver indicating a change of state of said barrier; causing said remote control unit to provide a signal to alert a user thereof as to the status of said barrier; communicating a wireless control signal from at least one of said base transceiver and said remote transceiver to an obstruction detector transceiver; and energizing said obstruction detector from a power consumption mode to a higher power consumption mode upon receipt of said wireless control signal. ### Claim 16 (depends on 15) The method set forth in claim 15 wherein: said transceivers are operable for communicating signals in packets of data by way of a wireless local area network. ### Claim 17 (depends on 15) The method set forth in claim 15 wherein: said wireless local area network is connected wirelessly to selected other remote networks to transmit the status of said barrier through said other networks. ### Claim 18 In a barrier operator system for moving a barrier between open and closed positions, a motor operably connected to a mechanism connected to said barrier, a base controller operably connected to said motor and operable to receive signals from barrier position limit detection means, at least one remote control unit operable for wireless communication with said base controller, at least one of a barrier status indicating unit and an obstruction detection unit operable for wireless communication with at least one of said base controller and said at least one remote control unit; said base controller including an RF base transceiver, said at least one remote control unit including an RF remote transceiver, said at least one of said barrier status indicating unit and obstruction detection unit including an RF transceiver; said transceivers being operable to transmit signals to at least one of said base transceiver and said remote transceiver indicating a status of said barrier of being one of in an open position, moving toward an open position, a closed position, moving toward a closed position and an obstruction detected; said remote control unit includes signal means for generating a status signal in response to transmissions from at least one of said base transceiver and said transceiver of said status indicating unit and said obstruction detection unit; and said obstruction detection unit includes control means responsive to a signal from at least one of said base transceiver and said remote transceiver for changing a power consumption mode of the obstruction detection unit. ### Claim 19 (depends on 18) The system set forth in claim 18 wherein: said transceivers are operable to transmit RF signals in a channel in one of a frequency band of 315 MHZ and 915 MHZ, respectively. ### Claim 20 (depends on 18) The system set forth in claim 18 wherein: transmissions between said transceivers are carried out over a communication network between said transceivers, said transceivers transmitting information via data packets in a half duplex mode enabled by said transceivers. ### Claim 21 (depends on 20) The system set forth in claim 20 wherein: transmissions between said transceivers include a protocol selected from a group consisting of ZigBee, Blue Tooth and WIFI protocols, respectively. ### Claim 22 (depends on 18) The system set forth in claim 18 including: a diagnostic and calibration control unit, including a transceiver for communicating with at least one of said base transceiver, said remote transceiver, said barrier status transceiver and said obstruction detector transceiver. ### Claim 23 (depends on 18) The system set forth in claim 18 wherein: said obstruction detection unit includes control means responsive to a signal from base transceiver for changing from a low power consumption mode to a higher power consumption mode for at least one of detecting an obstruction of the path of the barrier and exchanging RF transmissions with at least one of said base transceiver and said remote transceiver. ### Claim 24 In a barrier operator system for moving a barrier between open and closed positions, a motor operably connected to a mechanism connected to said barrier, a base controller operably connected to said motor and operable to receive signals from barrier position limit detection means, at least one remote control unit operable for wireless communication with said base controller, at least one of a barrier status indicating unit and an obstruction detection unit operable for wireless communication with at least one of said base controller and said one remote control unit; said base controller including an RF base transceiver, said remote controller including an RF remote transceiver, said at least one of said status indicating unit and obstruction detection unit including an RF transceiver operable to transmit signals to said base transceiver indicating one of a status of said barrier and an obstruction detected; and control means associated with said transceiver of one of said status indicating unit and said obstruction detection unit for changing from a low power consumption state to a higher power consumption state upon receiving a signal from at least one of said base transceiver and said remote transceiver. ### Claim 25 (depends on 24) The system set forth in claim 24 wherein: said transceivers are operable to transmit RF signals in a channel in one of a frequency band of 315 MHZ and 915 MHZ, respectively. ### Claim 26 In a loading dock, including a dock leveler and at least one vehicle restraint disposed adjacent said dock leveler, said vehicle restraint and said dock leveler including, respectively, detector units associated therewith for transmitting radio frequency signals to a transceiver and control unit indicating the status of said vehicle restraint and said dock leveler, respectively, and a master, control unit operably connected to respective control units for said vehicle restraint and said dock levelers transmitting radio frequency signals to indicate the status of each of said vehicle restraints and said dock levelers, respectively and wherein said detector units are operable between a lower power consumption mode until a change of status signal is provided from the control unit to the detector units, wherein in response to said change of status signal, said detector units operate in a higher power consumption mode. ### Claim 27 In a barrier operator system for moving a barrier between open and closed positions, a motor operably connected to a mechanism connected to said barrier, a base controller operably connected to said motor and operable to receive signals from barrier position limit detection means, and at least one remote control unit operable for wireless communication with said base controller, the improvement characterized by: said base controller includes an RF base transceiver and said at least one remote control unit includes an RF remote transceiver for communicating with said base transceiver, said remote control unit including status indicator means operable to indicate the status of said barrier as being one of open, opening, closed, closing, and obstruction detected in response to receiving signals from said base transceiver by way of said remote transceiver; a diagnostic and calibration control unit including a keypad, microprocessor, visual display, and diagnostic transceiver, said diagnostic and calibration control unit diagnosing and setting operating characteristics of said base controller; an obstruction detector including a detector transceiver for communicating obstruction detection signals to at least one of said base transceiver, said diagnostic transceiver, and said remote transceiver; and a power controller switching said obstruction detector between a power consumption mode and a low power consumption mode; wherein said detector transceiver receives wireless control signals from at least one of said base transceiver, said diagnostic transceiver, and said remote transceiver, and switches said power controller upon receipt of said wireless control signals; and wherein said diagnostic transceiver communicate with at least one of said base transceiver, said remote transceiver, and said detector transceiver. ### Claim 28 (depends on 27) The system set forth in claim 27 further comprising: a second remote control unit, wherein said second remote control unit is wall-mountable and includes a transceiver for communicating RF signals between said second remote control unit and at least one of said base transceiver, said remote transceiver, said detector transceiver, and said diagnostic transceiver.