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Elevator safety control device and elevator safety control method

A safety control and elevator technology, which is applied in transportation, packaging, elevators, etc., can solve problems such as undetectable timer abnormality, elevator inoperability, etc., and achieve the effect of ensuring soundness and usability

Inactive Publication Date: 2017-08-29
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, there is a problem that the elevator cannot be operated during the timer diagnosis, or the abnormality of the timer cannot be detected until the timer time limit elapses.

Method used

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  • Elevator safety control device and elevator safety control method
  • Elevator safety control device and elevator safety control method
  • Elevator safety control device and elevator safety control method

Examples

Experimental program
Comparison scheme
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Embodiment approach 1

[0021] figure 1 It is an overall configuration diagram of an elevator safety control device according to Embodiment 1 of the present invention. The safety control device 10 according to Embodiment 1 is configured to include a first CPU (Central Processing Unit: central processing unit) 1 and a second CPU 2 which are duplexed. Although not shown, each of the first CPU 1 and the second CPU 2 includes a ROM (Read Only Memory), a RAM (Random Access Memory), a clock, a watchdog timer, a bus, and the like.

[0022] The first CPU 1 and the second CPU 2 are connected by a communication line, and by comparing calculation results with each other, CPU failure diagnosis is performed. Furthermore, the safety control device 10 executes a safety control function, a self-diagnosis function, and a timer diagnosis function based on software respectively installed in the first CPU 1 and the second CPU 2 .

[0023] The 1st CPU 1 and the 2nd CPU 2 respectively receive the signal from the safety-...

Embodiment approach 2

[0076] Figure 4 It is an overall configuration diagram of an elevator safety control device according to Embodiment 2 of the present invention. The safety control device 10 of the second embodiment is different from that of the first embodiment figure 1 The difference in the structure compared with the above is that the timer 5, the timer 6, and the timer comparison unit 7 are provided outside the first CPU 1 and the second CPU 2. Therefore, the following description will focus on such structural differences.

[0077] Such as Figure 4 As shown, the safety control device 10 according to Embodiment 2 is provided with two timers 5 and 6 and a clock (not shown) outside the first CPU 1 and the second CPU 2 . The timers 5 and 6 are constituted by a logic circuit having a counter and a comparator, and perform a counting operation by counting clock pulses.

[0078] And the timer 5 starts and stops the counting operation according to the instruction from the first CPU 1, sets the...

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Abstract

In an elevator safety control device and an elevator safety control method according to the present invention, when an elevator abnormality is detected on the basis of a monitoring signal from a switch, sensor, or the like (safety-related switch / sensor 11, external safety control device 12) that monitors the status of the elevator, a safety control device (10) outputs a closest-floor stop command to an operation control device (16) in order to stop the car at the nearest floor, and performs safety control that stops the car by the time limit of a timer provided to the safety control device (10). Therein, the timer is configured to be a duplex system, and the safety control device (10) has a function of diagnosing the soundness of the timer itself by comparing the count values of the duplex timer.

Description

technical field [0001] The present invention relates to an elevator safety control device and an elevator safety control method that use a timer to measure the time until a car stops when an abnormality is detected, and particularly relates to a technology characterized by a timer diagnosis function. Background technique [0002] Conventional elevator safety control devices, especially electronic safety control devices, can detect abnormalities in the safety control device itself. In addition, this conventional device firstly outputs a stop command at the nearest floor for stopping the car at the nearest floor to the elevator control unit when an abnormality is detected. In addition, this conventional device outputs an emergency stop command for emergency stopping of the car to the elevator control unit when a preset time has elapsed from the output of the nearest floor stop command (for example, refer to Patent Document 1). [0003] prior art literature [0004] patent do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B5/00B66B3/00
CPCB66B5/0031
Inventor 柴田益诚鹫尾和则
Owner MITSUBISHI ELECTRIC CORP
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