Mitsubishi Electric Corporation

Kazunori Washio

Satoru Takahashi

Masunori Shibata

Takuya Ishioka

Toshinori Matsui

Masahiko Ikawa

Masafumi Iwata

Rikio Kondo

Hiroyuki Kozuki

Hiroyuki Kumazawa

Takuo Kugiya

Masayuki Maruyama

Masashi Kitayama

Satoshi Udou

Kazuki Hamada

Yasuto Kanayama

Kenji Kitayama

Yoshiyuki Uchida

This invention is concerning an elevator apparatus, in which a safety monitoring device corrects a detected car position using a signal from a car position detection device and monitors the presence or absence of car overspeed on the basis of an overspeed detection pattern that varies in accordance with car position. The car position detection device includes a first car position detection sensor and a second car position detection sensor which are arranged side by side in a vertical direction. The safety monitoring device performs, in parallel, first overspeed monitoring based on a car position corrected using a signal from the first car position detection sensor and second overspeed monitoring based on a car position corrected using a signal from the second car position detection sensor.

Elevator apparatus

Provided is an elevator safety system including: a plurality of communication controllers configured to communicate, over a network, signals including a safety control signal; a control device connected to a first communication controller, which is one of the plurality of communication controllers, and configured to execute operation control of the elevator, in which each of the plurality of communication controllers includes an error ratio measurement instrument configured to measure an error ratio of the network, based on a bit error of data that is received over the network, and in which the control device is configured to execute the operation control by switching the operation state of the elevator in accordance with the error ratio measured by the error ratio measurement instrument that is included in the first communication controller.

Elevator safety system

An elevator safety control device realizing suppression in increase in cost and labor hour of installation and maintenance without deteriorating safety of normal safety control functions even when a plurality of safety control functions are provided. The elevator safety control device includes an independence assurance unit assuring independence of a safety control function. The independence assurance unit assures independence of each of the safety control functions by monitoring whether or not the safety control function accesses a memory other than a permitted region. When the independence assurance unit detects an access to the memory other than the permitted region by a predetermined safety control function, the elevator safety control device stops a car.

Elevator safety control device

There are included an opposite-side transmitter unit for transmitting the same messages to plural communication paths, respectively; and a host-side receiver unit for receiving the messages flowing through the plural communication paths, respectively; wherein, the receiver unit, compares the plural received messages to perform verification using error-detection code on any one of the messages when they are identical, or on all of the messages when there is a mismatch; and when detected error of message due to error inclusion or reception failure, discards all of the messages received at that time, and calculates an accumulated number of error detections for each of the communication paths through which the messages has been transmitted, so as to stop receiving the control-related message, when the number of error detections has reached a given number, from the communication path where the number of error detections has reached the given number.

Communication device using plurality of communication paths

Each of a master node and a slave node has a safety data processing unit and a high reliability communication unit. At the time of transmission, the safety data processing unit creates a safety data packet including data about safety and the high reliability communication unit creates a communication data packet including the safety data packet and transmits the communication data packet a predetermined number of times. At the time of reception, the high reliability communication unit acquires and outputs a safety data packet by determining one of one or more communication data packets having the same contents which it has received properly as an effective packet, and the safety data processing unit analyzes a state concerning the safety of a system on the basis of the data about safety acquired from the safety data packet.

Signal transmission device for elevator

In an elevator device, a signal diagnosis device includes: a signal input section to which a sensor signal from a sensor is input; a disconnection detecting section for outputting a diagnosis signal for detecting disconnection to the sensor and detecting a state of a signal turned back at the sensor to be input so as to detect whether or not disconnection of the signal from the sensor occurs; a switch for turning ON/OFF an input of the signal to the disconnection detecting section; and a disconnection-detection diagnosis section for operating the switch to diagnose whether or not the disconnection detecting section functions normally. Further, a car is stopped when occurrence of the disconnection is determined by the signal diagnosis device or when an abnormality is detected by the disconnection-detection diagnosis section.

Elevator device

A transmitting apparatus included in a communication system that performs message communication using an error detection code with a receiving apparatus, the transmitting apparatus includes a transmission interval determining means that, based on a parameter related to a transmission error non-detection probability of a message per time, a data length of the message, and a code length of the error detection code used for the message, determines a transmission interval for transmitting the message, so that the transmission error non-detection probability of the message satisfies a condition related to a transmission error non-detection probability included in the parameter, wherein the message is transmitted to the receiving apparatus, based on the transmission interval determined by the transmission interval determining means.

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Tokyo, Japan

Kazunori Washio