Elevator monitor and control system with multiple power sources

• US 5,162,623 A
• Filed: 10/15/1991
• Issued: 11/10/1992
• Est. Priority Date: 10/16/1990
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Tachino, Kenzo
• Primary Examiner(s): Pellinen, A. D.
• Assistant Examiner(s): COLBERT, LAWRENCE
• Application Number:
  US07/775,554
• Time in Patent Office: 392 Days
• Field of Search: 187/133, 187/134, 187/129, 187/114, 307/64, 307/87
• US Class Current: 187/290
• CPC Class Codes: B66B 1/3492 Position or motion detectors or driving means for the detector B66B1/40, B66B1/50 take precedence; length measuring G01B; speed measuring G01P
• CPC Class Codes: B66B 5/0006 Monitoring devices or performance analysers B66B5/02 takes precedence
• CPC Class Codes: B66B 5/0018 Devices monitoring the operating condition of the elevator system

Abstract

An elevator monitor and control system includes at least one elevator control apparatus, a monitor panel, and a power line interconnecting the elevator control apparatus and the monitor panel. The monitor panel includes an inverter power source backed up by a battery. Each elevator control apparatus includes a first power source for supplying normal power to an internal circuit of the elevator control apparatus, a second power source connected to the power line for supplying power to the elevator control apparatus upon the failure of the first power source, and a control circuit for determining which of the first and second power sources should supply power. A signal conversion control circuit disposed within each of the monitor panels and the elevator control apparatus exchanges data concerning car position, elevator control and the like between the monitor panel and the elevator control apparatus by series transmission through the power line.

Claims

1. An elevator monitor and control system, comprising:

at least one elevator control apparatus;

a monitor panel; and

a power line interconnecting said elevator control apparatus and said monitor panel;

said monitor panel including an inverter power source backed up by a battery and connected to said power line;

each of said elevator control apparatus including a first electric power source for supplying a normal power source to an internal circuit of said elevator control apparatus, a second electric power source connected to said power line for supplying a power source to said internal circuit of said elevator control apparatus upon the failure of said first power source and control means for controlling which of said first and second power sources should supply said power source; and

signal conversion control means disposed within each of said monitor panel and said elevator control apparatus, for exchanging data concerning car position, elevator control and the like between each of said monitor panel and said elevator control apparatus by series transmission through said power line.

2. An elevator monitor and control system as claimed in claim 1, wherein said control means comprises first and second diodes connected in opposite directions.

3. An elevator monitor and control system as claimed in claim 1, wherein said signal conversion control means comprises a monitor panel data processing unit.

4. An elevator monitor and control system comprising:

a power line for supplying power to an elevator car;

an elevator control apparatus for installation on an elevator car and including a first power source, a second power source connected to the power line, first data transmission means connected to the power line for serial transmission of data via the power line, and switching means for connecting one of the power sources to the first data transmission means; and

a monitor panel for installation remote from elevator car on which the elevator control apparatus is mounted and including a backup battery, an inverter connected between the battery and the power line, and second data transmission means connected to the power line for serial transmission of data to the first data transmission means via the power line.