Elevator system adaptive time-based block operation

• US 4,766,978 A
• Filed: 10/16/1987
• Issued: 08/30/1988
• Est. Priority Date: 10/16/1987
• Status: Expired due to Term

• Current Assignee: Inventio AG (Schindler Holding AG)
• Original Assignee: Westinghouse Electric Company LLC (Brookfield Asset Management Incorporated)
• Inventors: Shah, Denis D., Blain, Jeffrey W.
• Primary Examiner(s): Shoop, Jr., William M.
• Assistant Examiner(s): Duncanson, Jr., W. E.
• Application Number:
  US07/109,640
• Time in Patent Office: 319 Days
• Field of Search: 187/101, 187/102, 187/124
• US Class Current: 187/247
• CPC Class Codes: B66B 1/343 Fault-tolerant or redundant control system configuration
• CPC Class Codes: B66B 5/0018 Devices monitoring the operating condition of the elevator system

Abstract

An elevator control system and method for efficient failure control of block operation with a local area network on the traveling cable and distributed electronic control circuits in the car and proximate to the respective floors with a remote microprocessor controller for each car. A local area network also provides communication with the corridor fixtures in a serial signal format of input and output signals. Each remote controller includes a microprocessor based computer circuit which normally communicates over a multicar-link with the other and also over the local area networks for car and hall calls. Each controller implements an adaptive time based block operation with the total building being serviced, despite partial or total failure of communication between the controllers and the corridor fixtures, which would otherwise degrade the bank operation sooner and more restrictively.

Claims

1. A method of controlling a plurality of elevator cars for protecting against an excessively restricted block operational mode of elevator service from each floor of a building, with each car communicating on a local area network from an electronic circuit located thereat and through a separate traveling cable to a remote controller,

each remote controller including a microprocessor based computer circuit individual to each car and with each remote controller normally capable of communicating corridor signal information on a local area network through a riser cable terminating in a set of floor control circuits distributed proximate to each floor,

each said microprocessor based computer circuit adaptively implementing successive failure control modes for a floor control strategy to assign the better car or cars into operation, based on communication network integrity, relative car travel positions and timing, to respond to the hall calls registered at the floors along said cable riser, and

each said remote controller repeatedly checking its operational capability and communication signal integrity for the corridor cable riser so as to respectively being implementing an adaptive block operation mode, with the least restrictive affect in the floor control strategy, should there be a communication failure affecting the respective remote controller from communicating on the cable riser, with the capacity for totally servicing the building in moving passengers to the bottom floor.

2. The method of claim 1 wherein the implementing step for the adaptive block operation provides that each remote controller initializes loading a timer for each floor when the associated car is brought down to the bottom floor and begins counting down a wait-timer, starting from when the car begins to move up from the bottom floor, so that a hall call is answered at a particular floor, thereafter reloading the wait timer at the particular floor with a wait-time identical to that which initialized the timer loading, which is directly proportional to the number of cars that the floor is being serviced by, and sharing the service to the floor by all the controllers associated with cars that are activated on block operation.

3. The method of claim 1, wherein the step of each remote controller microprocessor based computer circuit for communicating corridor signal information over a local area network is implemented by bi-directionally communicating in serial signal transmission format through the riser cable or hallway serial link for so long as it is a viable network, as determined by the checking step for implementing the adaptive block operation for each controller not able to communicate signals on the riser cable in response to registered hall calls.

4. The method of claim 1, wherein said plurality of elevator cars is in a two-car-pair operating system and the remaining controller, associated with the remote controller which begins implementing the adaptive block operation, are each adapted to operate their respective microprocessor based computer circuit for fully implementing a single car system with a floor control strategy as the hall call response for said two-car-pair, after being selected by said repeated checking step, the selected controller implementing the floor control strategy by itself responding to the hall calls registered at the floors, for so long as a communication path is viable, while concurrently controlling the car response individual to its registered car calls local to the car.

5. The method of claim 1, wherein said plurality of elevator cars is in an operating system which includes a plurality of two-car-pair sets of cars and the remaining controller, associated with the remote controller which begins implementing adaptive block operation within each set, each includes a microprocessor based computer circuit fully implementing a single car system floor control strategy as the hall call response, respectively, for each side pair of said plural two-car-pair, and being selected for operation by said repeated checking step, each of the respective selected controllers being capable of implementing the floor control strategy by itself by responding to the hall calls registered at the floors for so long as a communication path is viable, while concurrently controlling the car response individual to its registered car calls from the respective car.

6. A control system for controlling a plurality of elevator cars protected against an excessively restricted block operational mode of elevator service from each floor of a building, comprising:

a first local area network for each car having its car call signals communicating thereon and including an electronic circuit located with each car connected to a remote controller on a traveling cable, each remote controller including a microprocessor based computer circuit individual to each car,

a second local area network for each remote controller to normally communicate corridor signal information through a riser cable terminating in a set of floor control circuits distributed proximate to each floor,

each said microprocessor based computer circuit being adapted to implement successive failure control modes for a floor control strategy to assign the better car or cars into operation, based on communication network signal integrity, relative car travel positions and timing, to respond to the hall calls registered at the floors along said cable riser, and

each said remote controller computer circuit including means for repeatedly checking its operational capability and the communication signal integrity for the corridor cable riser within the control system, so as to respectively begin implementing an adaptive block operation mode, with the least restricted affect in the floor control strategy, should there be a communication failure affecting the respective remote controller from communicating on the cable riser, with the capacity for totally servicing the building in moving passengers to the bottom floor.

7. The control system of claim 6, wherein an adaptive block operation program module in the respective controller microcomputers includes a time counter function providing a wait timer for each floor for time counting which begins counting out initially when the associated car begins to mvoe up from the bottom floor when a hall call is to be answered at a particular floor,

a wait-time for each floor is loaded, initially at the bottom floor, which is directly proportional to the number of cars that the floor is being serviced by, and is reloaded after a call for the particular floor is answered, and sharing the service to the floor by all the controllers associated with cars that are activated on block operation.

8. The control system of claim 6, wherein said plurality of elevator cars is in an operating system which includes a plurality of two-car-pair sets of cars and the remaining controller, associated with the remote controller which begins implementing adaptive block operation within each set includes a microprocessor based computer circuit capable of fully implementing a single car system with a floor control strategy for the hall call response, respectively, for said plural two-car-pair, and being selected for operation by said means repeatedly checking its operational capability, each of the respectively selected controllers being capable of individually implementing the floor control strategy by itself responding to hall calls registered at the floors, for so long as a communication path is viable, while concurrently controlling the car response individual to its car calls from the respective car.

9. The control system of claim 6, wherein each remote controller microprocessor based computer circuit is adapted for serially communicating corridor signal information over the local area network which is implemented by bi-directionally communicating in serial signal transmission format through the riser cable or hallway serial link for so long as it is a viable network, as determined by the checking means for implementing the adaptive block operation for each controller which is not able to communicate a signals on the riser cable in response to registered hall calls.

10. The control system of claim 9, wherein said plurality of elevator cars is in a two-car-pair operating system and the remaining controller associated with the remote controller which begins implementing the adaptive block operation, are each adapted to operate their respective microprocessor based computer circuits to singularly implement a single car system with a floor control strategy for the hall call response for said two-car-pair, after being selected by said means repeatedly checking its operational capability, the selected controller implements the floor control strategy by itself to respond to hall calls registered at the floors for so long as a communication path is viable, while concurrently controlling the car response individual to its registered car calls local to the car.