JPH1081462A - Abnormality diagnostic device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely and quickly diagnose the disconnection of the strand of a main rope for an elevator from the inside of an elevator cage using an acceleration sensor. SOLUTION: The detected output of acceleration from an acceleration sensor 5 set in an elevator cage 4, is converted by an A/D converter 6 from an analogue voltage signal to digital data so as to be stored in a memory device 7 once. A data processing device 8 extracts sudden acceleration that takes place when any strand is broken, out of the memory device 7, and specifies the location of its outbreak. A judging device 9 makes judgement on the disconnection of any strand, and obtains information on the location of its outbreak based on the presence or absence of abnormal signals from the data processing device 8. Diagnostic information from the judging device 9 is thereby indicated on an indication device 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormality diagnosis apparatus for an elevator, and more particularly to a function for measuring an acceleration in an elevator car and detecting a broken wire of a rope at an early stage from the abnormality. The present invention relates to an abnormality diagnosis device for an elevator with a handle.

[0002]

2. Description of the Related Art At present, a diagnosis of a broken wire is performed by a worker who goes to a machine room and visually inspects during maintenance and inspection of an elevator, which is an important item for safety.

[0003]

As described above, although the wire breakage diagnosis is an important item, the conventional method cannot perform the diagnosis under the same conditions due to the skill of the workers and individual differences. In order to make a diagnosis visually by an operator, it is necessary to work at a low operating speed of the elevator, which takes time.

[0004] It is an object of the present invention to provide an elevator abnormality diagnosis apparatus characterized in that an elevator main rope rope breakage diagnosis can be performed safely and quickly from within a car using an acceleration sensor.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, an object of the present invention is to detect an abnormal signal at the time of disconnection of a main rope element wire from an acceleration detection output obtained from an acceleration sensor attached to an elevator car in an elevator. And a determination unit that evaluates and analyzes output data of the data processing unit and generates abnormality information when the output data indicates an abnormal value.

[0006]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of an elevator abnormality diagnosis apparatus according to the present invention.
Is a main rope, 2 is a sheave attached to a main motor shaft of an elevator (not shown), 3 is a counterweight, 4 is an elevator car (car), 5 is an acceleration sensor attached to the car 4, 6 is an analog digital A converter (A / D converter), 7 is a storage device, 8 is a data processing device, 9 is a judgment device, 10 is a display device, 11 is a central processing unit (CPU), and a central processing unit (CPU) 11 is ,
The overall operation of the elevator abnormality diagnosis apparatus according to the present embodiment is controlled.

Reference numeral 4 denotes a car that travels in the elevator shaft. The car 4 is suspended along with the counterweight 3 from the sheave 2 via the main rope 1 in a hanging manner.

FIG. 2 shows a vertical acceleration detection output waveform output from the acceleration sensor 5 when the elevator is normal.
A part in the figure is an acceleration traveling area, B part is a steady traveling area, and C part is a deceleration traveling area.

When a wire break occurs in the main rope 1, a sudden acceleration having a specific frequency appears when the wire break occurrence position of the main rope 1 passes through the sheave 2 during elevator running.

[0011] The sudden acceleration having this unique frequency is:
It is possible to detect by the acceleration sensor 5 attached to the car.

FIG. 3 shows a vertical acceleration detection output from the acceleration sensor 5 when a wire break occurs in the main rope 1. The occurrence of an abnormal sudden acceleration in the portion D during steady running is shown. Is recognized.

In practice, in order to recognize the wire breakage phenomenon, the detected acceleration detection output is converted from analog to digital, stored once in the storage device 7 at regular intervals, and variously processed by the data processing device 8. It needs to be converted to diagnosable data.

To extract the sudden acceleration, as shown in FIG. 4A, data obtained by averaging the collected acceleration data is obtained as shown in FIG.
The time T at which the phenomenon occurred is specified by comparing (b).

Further, the acceleration data stored in the storage device 7 is integrated, converted into speed data, and integrated again to obtain the position of the elevator car 4 at each time.

By comparing the time of occurrence of these sudden accelerations with the position of the elevator car 4 at each time, it is possible to specify the actual wire breakage location in the elevator.

Since the extracted sudden acceleration cannot be distinguished from other phenomena as it is, the frequency of the extracted sudden acceleration data part is analyzed by the data processing device 8 as shown in FIG. It is confirmed that the frequency component is included in the natural frequency region E generated at the time of the wire breakage phenomenon. Thereby, it is specified that the extracted sudden acceleration is caused by the wire breakage phenomenon.

As a result of the above-described processing, the judging device 9 judges whether or not the wire breakage phenomenon has occurred, and passes the information to the display device 10.

The display device 10 displays the presence / absence of wire breakage as a diagnostic result and, if so, the position of the wire break, and prompts maintenance personnel to respond.

[0020]

As described above, according to the present invention, the diagnosis of the breakage of the strand of the main rope, which has been conventionally performed visually by the maintenance personnel in the machine room, can be performed with high precision and speed in the car.

As a result, not only the reliability can be improved, but also the work can be performed simultaneously with other diagnoses, and the time required for maintenance personnel inspection can be reduced (reduction of labor costs), and safety and
It also leads to improved service to customers.

In addition, since the diagnosis can be performed by the diagnostic device instead of the conventional human eyes, other diagnostic functions are incorporated, and the development of a comprehensive elevator diagnostic device can be realized in the future.

[Brief description of the drawings]

FIG. 1 is a block diagram of an elevator abnormality diagnosis apparatus according to an embodiment of the present invention.

FIG. 2 is a waveform diagram of the vertical traveling acceleration of the elevator in a normal state according to the embodiment of the present invention.

FIG. 3 is a waveform diagram of vertical acceleration of an elevator when a strand breaks according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a method of extracting sudden acceleration data from collected acceleration data according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a result of frequency analysis of collected acceleration data according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main rope 2 Sheave 3 Counter weight 4 Elevator car 5 Acceleration sensor 6 Analog-digital converter (A / D converter) 7 Storage device (buffer) 8 Data processing device 9 Judgment device 10 Display device 11 Central processing unit (CPU)

Claims (1)

[Claims] In an elevator, a data processing means for detecting an abnormal signal at the time of a main rope strand break from an acceleration detection output obtained from an acceleration sensor attached to an elevator car, and an evaluation of output data of the data processing means And a determination unit for performing analysis and generating abnormality information when the output data indicates an abnormal value.