US 5,557,546 AGranted

Data acquisition system for the analysis of elevator trouble

AssigneeHitachi Building Systems and Engineering Service Co.

InventorsHisanori Fukai, Hiroshi Yamazaki, Kenji Kawano, Shinichiro Kawano, Hajime Okamoto

Life of this patent

Estimating the term…

Loading patent…

Abstract

Operational data of an elevator are constantly and successively stored in RAM of a terminal supervisor unit. If the elevator develops a malfunction which lasts for a predetermined time, this malfunction is detected and reported from the terminal supervisor unit to a supervisor center, together with relevant data, such as the place of occurrence of the malfunction, the code number of the elevator in question and the kind of malfunction. The data relevant to the malfunction are collected at a time point when predetermined specific data indicate that a malfunction is likely. For this purpose, malfunction-indicating states of the specific data are preset and stored in a preset value storage unit, for each possible kind of malfunction, and are constantly compared with the corresponding actual data. By collecting relevant data before actual determination of a malfunction, an investigation for a cause of the malfunction through an analysis of data can be performed more accurately.

Claims6

Dependent claims

A data acquisition system for analyzing elevator malfunctions, of the type having an operational data storage unit for storing operation data of an elevator, malfunction determination means for determining occurrence of a malfunction of the elevator on the basis of data read from said operational data storage unit, and data collection means for reading data from said operational data storage unit, said data being relevant to said determination of a malfunction by said malfunction determination means;

said operational data storage unit, malfunction determination means and data collection means being arranged in a terminal supervisor unit connected to a supervision center for supervising said elevator via a telephone line, said system further comprising:
a preset value storage unit for storing a set of criteria for determining existence of a malfunction-indicating state, in which occurrence of a malfunction of said elevator is likely to be imminent, but has not yet occurred;
means for presetting criteria for determining existence of a malfunction-indicating state in said preset value storage unit from said supervision center via said telephone line;
and
data collection trigger means for actuating said data collection means to read predetermined operational data from said operational data storage unit at a time, prior to actual occurrence of a malfunction, when data stored in said operational data storage unit correspond with said criteria preset for the determination of the malfunction-indicating state.

2 more elements

Dependencies are inferred from the claim text.