Patents by Inventor Toshimitsu Tobita

Toshimitsu Tobita has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5892190
    Abstract: Elevator group supervisory control method and system for group supervisory control of a plurality of elevators serving a plurality of floors. The method and apparatus of the invention permits the inputting of qualitative requests (guidance), from the user, concerning elevator operation into the group supervisory control system. Qualitative requests concerning elevator operation are set in the form of guidance (or request) targets. The thus set request targets are converted into control targets for the elevators. Actual group supervisory control is executed using the control targets.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: April 6, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Yuzo Morita, Toshimitsu Tobita, Kiyoshi Nakamura, Atsuya Fujino, Soshiro Kuzunuki, Kotaro Hirasawa, Yoshio Sakai, Kenji Yoneda, Takaaki Ueshima, Yuji Toda, Hiromi Inaba
  • Patent number: 5409085
    Abstract: The present invention relates to a group control elevator system which has been adjusted to operate in response to a state of utilizing elevator cars. In a group control elevator system which carries out a control of allocating elevator cars to elevator car calls for serving many floors by using an evaluation function having a plurality of variable parameters, targets for elevator control performance are inputted, a traffic flow to which elevator car demand belongs is judged, variable parameters to be adjusted which have been set in advance for each combination of said targets and traffic flows are stored, stored variable parameters are adjusted, adjustment sequence of variable parameters to be adjusted is stored, and a plurality of variable parameters are sequentially adjusted according to the stored sequence. By the above arrangement, only desired parameters to be adjusted are selected and adjusted out of a plurality of variable parameters for desired targets and traffic flows.
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: April 25, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Atsuya Fujino, Toshimitsu Tobita, Hiromi Inaba, Kiyoshi Nakamura, Yoshio Sakai, Kenji Yoneda, Hiroaki Yamani
  • Patent number: 5307903
    Abstract: Elevator group supervisory control method and system for group supervisory control of a plurality of elevators serving a plurality of floors. The method and apparatus of the invention permits the inputting of qualitative requests (guidance), from the user, concerning elevator operation into the group supervisory control system. Qualitative requests concerning elevator operation are set in the form of guidance (or request) targets. The thus set request, targets are converted into control targets for the elevators. Actual group supervisory control is executed using the control targets.
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: May 3, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Yuzo Morita, Toshimitsu Tobita, Kiyoshi Nakamura, Atsuya Fujino, Soshiro Kuzunuki, Kotaro Hirasawa, Yoshio Sakai, Kenji Yoneda, Takaaki Ueshima, Yuji Toda, Hiromi Inaba
  • Patent number: 5283399
    Abstract: The invention relates to a group-control elevator system for controlling an operation of elevators a group by control data. The group-control elevator system stores a plurality of improvement measures corresponding to plural inconvenience phenomenon including a long average wait time for the plurality of elevators. The inconvenience phenomenon is detected from actual data of the elevators, and the actual data is obtained by actual elevator operation and one improvement measure is selected from the improvement measures in accordance with the detected inconvenience phenomenon.
    Type: Grant
    Filed: November 5, 1991
    Date of Patent: February 1, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Atsuya Fujino, Hiromi Inaba, Toshimitsu Tobita, Kenzi Yoneda, Hiroaki Yamani
  • Patent number: 5239141
    Abstract: In a group-management control apparatus for an elevator system with plural elevators capable of serving plural floors, hall calls are allotted to adaptive elevators in accordance with a predetermined hall call allotment algorithm, for the purpose of achieving desired control targets. Plural kinds of the hall call allotment algorithm with different schemes are provided in advance, and the predetermined hall call allotment algorithm is selected therefrom by a reasoning operation, which is executed in accordance with a reasoning rule selected from among a plurality of reasoning rules empirically provided in advance on the basis of the desired control targets and an operating state of the elevators.
    Type: Grant
    Filed: June 14, 1990
    Date of Patent: August 24, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Toshimitsu Tobita, Atsuya Fujino, Hiromi Inaba, Kiyoshi Nakamura, Kenzi Yoneda, Takaaki Ueshima
  • Patent number: 5042620
    Abstract: A control system for an elevator has a plurality of elevator information generation devices each of which has an information output unit which outputs elevator information to an elevator controller and also to at least one display controller which generates one or more on elevator displays. There are a plurality of display controllers, these are preferably connected to the information output units by a common transmission path. There may be a plurality of elevator controllers, when there are a plurality of elevator cabs, and those elevator controllers may all be connected to the common transmission path. There is then a supervisor controller for controlling the elevator controllers.
    Type: Grant
    Filed: September 12, 1989
    Date of Patent: August 27, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Kenzi Yoneda, Yoshio Sakai, Hiroshi Matsumaru, Toshimitsu Tobita, Seiji Yasunobu
  • Patent number: 5010472
    Abstract: A customer participatory elevator control system includes a device for setting and storing information necessary to operate a plurality of elevators on trial and a device for operating the elevators on the basis of the trial operation information. When the customer inputs into the control system a request which is unexpected to the elevator maker in the course of design of operation specifications, the control system enables the customer to carry out a trial of elevator call assignment control and guide control in accordance with the customer's request and changes the designed elevator operation specifications in accordance with results of the trial.
    Type: Grant
    Filed: February 17, 1989
    Date of Patent: April 23, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Kenzi Yoneda, Takaaki Ueshima, Soshiro Kuzunuki, Yuzo Morita, Toshimitsu Tobita
  • Patent number: 4989694
    Abstract: The invention relates to call registration wherein of a plurality of elevators an elevator which a user (passenger) wants to ride is called to the elevator hall of the user. A display is provided at an elevator hall for users. When a user depresses a hall calling button, a group supervisory controller determines and selects a suitable elevator, and causes the condition of the elevator to be displayed on the display in the form of sentences or the like. If the user is satisfied with the selected elevator, the hall calling button is not actuated again. If the user is dissatisfied with the selected elevator, the hall calling button is depressed again so that the controller selects another elevator for service to the user.
    Type: Grant
    Filed: March 8, 1989
    Date of Patent: February 5, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Takaaki Ueshima, Kenji Yoneda, Naobumi Nakata, Toshimitsu Tobita, Soshiro Kuzunuki, Yuzo Morita, Atsuya Fujino, Masato Suzuki, Masachika Yamazaki
  • Patent number: 4947965
    Abstract: In a group-control for an elevator system with plural elevator cages, when a hall call is generated, evaluation values of all of group-controlled cages with respect to the generated hall call are calculated by a predetermined evaluation function, as expressed by the following formula:.phi..sub.n =(WT-k.sub.p Z.sub.p +k.sub.c T.sub.c +k.sub.L L.sub.L -K.sub.z Z.sub.Z -k.sub.s Z.sub.s).sub.nn=1, 2, . . ., Nwherein N denotes the total number of group-controlled elevator cages, WT, Z.sub.p, T.sub.c, L.sub.L, and Z.sub.s represent evaluation indexes of a waiting time, an equal time-interval operation preferential zone, a riding time, a cage-load factor, a first-arriving cage preferential zone and a stop call, and k.sub.p, k.sub.c, k.sub.L, k.sub.z and k.sub.s represent control parameters for the last five of the evaluation indexes above, respectively. The generated hall call is allotted to a cage having a minimal evaluation value calculated by the aforesaid evaluation function.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: August 14, 1990
    Assignee: Hitachi, Ltd.
    Inventors: Soshiro Kuzunuki, Yuzo Morita, Kenzi Yoneda, Takaaki Ueshima, Toshimitsu Tobita, Atsuya Fujino
  • Patent number: 4872532
    Abstract: In elevator equipment in which an elevator controller is connected by a common transmission line to an elevator cage and a plurality of apparatus installed at elevator stops on respective floors, signals are transmitted from the elevator controller to the elevator cage and the plurality of apparatus of elevator stops on respective floors. Information transmitted between the elevator controller and the cage as well as each apparatus at elevator stop on each floor is sorted into information which is different for each apparatus on each floor and the cage (unique information) and information which is the same for the plurality of apparatus at elevator stops on respective floors and the cage (common information), and the unique information is transmitted during a first period and the common information is transmitted during a second period, thereby reducing time required for transmission of information during one cycle.
    Type: Grant
    Filed: August 4, 1988
    Date of Patent: October 10, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Toshimitsu Tobita, Hiromi Inaba, Masachika Yamazaki, Masato Suzuki, Yuzo Morita, Toshiki Kajiyama, Kiyoshi Nakamura, Kenji Yoneda
  • Patent number: 4870556
    Abstract: Control signals for operating power converter switching elements are created using one-chip microcomputers. Pulse patterns required to supply the control signals and their generating timings are previously created and scheduled in pairs. When the times when the control signals are to be supplied to the switching elements have actually come, those control signals are successively output.
    Type: Grant
    Filed: January 12, 1987
    Date of Patent: September 26, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Hiromi Inaba, Seiya Shima, Toshiaki Kurosawa, Toshimitsu Tobita, Mitsuyuki Hombu, Nobuo Mitsui
  • Patent number: 4829416
    Abstract: In a three phase inverter which is composed of transistors turned on or off in accordance with the PWM control, the pulse widths of PWM gate signals for the transistors are determined in accordance with the magnitudes of two of the three phases of the current to be output by the inverter.The load of a processor for generating the gate signals can be reduced to the great extent, and in addition thereto, the waveform of the output current of the inverter is much improved.
    Type: Grant
    Filed: January 12, 1987
    Date of Patent: May 9, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Hiromi Inaba, Seiya Shima, Sadao Hokari, Toshimitsu Tobita, Hideaki Takahashi, Shigeta Ueda