JP2000335845A - Elevator diagnostic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator diagnostic device capable of automatically diagnosing deterioration of relay coils and contacts in an elevator control device without dispersion. SOLUTION: This elevator diagnostic device 3 to automatically diagnose elevator devices is provided with a resistance measuring means 4 to measure resistance of relay coils and contacts 23 included in an elevator control device 2, a memory means 34 to store resistance values of the relay coils and contacts 23 measured at the previous time at least, a determination means 35 to compare the resistance values for the previous time stored in the memory means 34 with resistance values for the current time measured by the resistance measuring means 4, and determine degree of deterioration of the corresponding relay coils and contacts 23, and an outputting means 31 to output a specified prediction means when the corresponding relay coils and contacts 23 are determined as deteriorated by the determination means 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator diagnostic apparatus for automatically diagnosing the degree of deterioration of equipment provided in an elevator.

[0002]

2. Description of the Related Art Hitherto, diagnosis of relays and contactors provided in a control panel for controlling the operation of an elevator has been performed visually by a maintenance person or an inspector.

[0003]

In the above-mentioned prior art, it is necessary to diagnose a maintenance person and an inspector, and there is a possibility that the deterioration judgment of the relay and the contactor may vary depending on the skill of the maintenance person and the inspector. .

[0004] It is an object of the present invention to provide an elevator diagnostic apparatus that automatically and consistently diagnoses deterioration of relay coils and contacts in an elevator control apparatus.

[0005]

An object of the present invention is to provide an elevator diagnostic apparatus provided in an elevator having an elevator control device for controlling the operation of a car for automatically diagnosing elevator equipment. A resistance measuring means for measuring the resistance of the relay coil and the contact included in the storage means for storing at least the resistance value of the relay coil and the contact measured the last time, the resistance value stored in the storage means, Comparing the resistance value measured by the resistance measuring means with the current resistance value to determine the degree of deterioration of the corresponding relay coil and the contact; and determining that the corresponding relay coil and the contact have deteriorated by the determining means. Output means for outputting a predetermined sign signal when the operation is performed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of an elevator diagnostic apparatus according to the present invention.

In FIG. 1, reference numeral 1 denotes an elevator control panel;
Denotes an elevator control device, 3 denotes a diagnostic device for diagnosing elevator equipment, 4 denotes a resistance measuring device, and 5 denotes a remote monitoring device. In the elevator control device 2, reference numeral 21 denotes a control unit which is a known microcomputer control device, reference numeral 22 denotes a communication unit which transmits and receives signals between the control unit 21 and other devices, and reference numeral 23 denotes a control relay to be diagnosed in the present embodiment. Show. In the diagnostic device 3, reference numeral 31 denotes a diagnostic control unit for controlling diagnosis of each elevator device, and reference numeral 32 denotes a communication unit of the diagnostic device, which receives signals from the resistance measuring device 4, transmits and receives signals to and from the elevator control device 2, and performs remote monitoring A predetermined signal is issued to the device. Reference numeral 33 denotes a diagnostic relay for disconnecting the relay coil or the contact from the elevator control device 2 and connecting to the resistance measuring device 4 when the control relay deterioration diagnosis of the elevator control device 2 is performed. Reference numeral 34 denotes a storage unit that stores the current measurement result and the resistance value of a predetermined relay coil or contact point measured in the past,
Reference numeral 5 compares the resistance value of the relay coil or the contact measured by the current diagnosis with the past resistance value stored in the storage unit 34, and issues a signal indicating a failure sign of the relay based on a change in the resistance value. It is a determination unit for determining whether or not.

In the resistance measuring device 4, reference numeral 41 denotes a measuring unit for measuring the resistance values of a predetermined relay coil and a contact of the control relay 23, on which a known resistance measuring device is mounted.
Reference numeral 42 denotes a communication unit for transmitting the resistance value measured by the measurement unit 41 to the diagnostic device 3 as data.

FIG. 2 is a flowchart showing the operation of the apparatus shown in FIG.

When the diagnosis device 3 receives a diagnosis request signal from the remote monitoring device 5 or determines that there is a diagnosis request due to a predetermined date and time (S1), it transmits a diagnosis request signal to the elevator control device 2. . When a diagnostic permission signal is received from the elevator control device and the diagnostic device 3 is in the diagnostic mode (S2), the diagnostic device 3 transmits a diagnostic operation signal to the elevator control device 2, and the elevator operation mode is the diagnostic operation mode. (S3). As part of the main diagnostic operation, a relay deterioration diagnosis is performed after the diagnostic operation (S4) of the other device. The diagnostic device 3 sequentially excites the diagnostic relays 33, receives the resistance values of the respective relay coils and contacts transmitted from the resistance measuring device 4, and stores the resistance values in the storage unit 34 (S
5). The determination unit 35 compares the resistance value measured this time in the storage unit 34 with the past measurement result, and when a change in the resistance value is larger than a predetermined value, that is, when a remarkable variation is found in the resistance value (S6), The diagnosis control unit 31 issues a relay failure signal to the remote monitoring device 5 (S7). When the above diagnosis is completed (S8), the diagnosis control unit 31 transmits a diagnosis operation end signal to the elevator control device 2, the operation mode of the elevator shifts to the normal operation mode, and returns to the normal operation (S9).

FIG. 3 is a circuit diagram of the control relay 23 according to one embodiment of the present invention.

Each contact of the diagnostic relays 33A and 33B is connected to a relay coil of the control relay 23A,
B is connected to the normally open contact 23Ba of the diagnostic relay 3 except when the elevator is in normal operation and when the relay deterioration is diagnosed.
3A and 33B are not excited, and are therefore electrically disconnected from the measuring device 4.

At the time of the relay deterioration diagnosis shown in S5 of FIG.
The diagnostic device 3 excites the diagnostic relays in the order of the diagnostic relays 33A, 33B,. The excitation of the diagnostic relay 33A disconnects the relay coil of the control relay 23A from the control device 2, connects to the measuring device 4, and measures the resistance. Similarly, by energizing the diagnostic relay 33B, the control relay 23B
The normally open contact 23Ba is disconnected from the control device 2 and connected to the measuring means 4 to excite a control relay 23B coil (not shown), and the resistance is measured. In this manner, the automatic diagnosis of the predetermined relay coil and the contact of the control relay 23 is periodically performed. In the present embodiment, the diagnosis relay 33 is treated as a contact point, but this may be a non-contact type.

As described above, according to the present invention, the deterioration diagnosis of the relay coil and the contacts in the elevator control device can be performed automatically and without variation.

[0016]

According to the present invention, the preventive maintenance of a relay contactor of an elevator can be achieved by automatically and without a variation diagnosis of deterioration of a relay coil and a contact in an elevator control device. Also,
The amount of maintenance and inspection work can be reduced.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing an operation of the diagnostic device of FIG. 1;

FIG. 3 is a relay circuit diagram according to an embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 elevator control panel 2 elevator control device 21 control unit 22 communication unit 23 control relay 3 elevator diagnostic device 31 diagnostic control unit 32 communication unit 33 diagnostic relay 34 storage unit 35 determination unit 4 resistance measurement device 41 measurement unit 42 communication unit 5 remote Monitoring device

Claims (1)

[Claims] An elevator diagnostic device provided in an elevator having an elevator control device for controlling the operation of a car and automatically diagnosing elevator equipment,
Resistance measuring means for measuring the resistance of the relay coil and the contact included in the elevator control device, storage means for storing at least the resistance value of the relay coil and the contact measured last time, and the resistance stored in the storage means Value and the current resistance value measured by the resistance measuring means,
Determining means for determining the degree of deterioration of the corresponding relay coil and contact; and output means for outputting a predetermined signal when the determining means determines that the corresponding relay coil and contact have deteriorated. A diagnostic device for an elevator.