JP2018100151A - Elevator control device and elevator control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator control device that is capable of controlling an elevator by detecting an abnormality caused by ion migration, etc.SOLUTION: This elevator control device is provided with: at least one input circuit that receives a signal from a safety device relating to an elevator; a control microcomputer that controls an elevator on the basis of a signal received from the input circuit; a setting circuit that receives a signal indicating a fetching condition for assuming the signal received from the input circuit and transmits, to the input circuit, a signal indicating an output logic when the input circuit outputs the signal received from the safety device to the control microcomputer on the basis of the fetching condition. The elevator control device is configured such that the input circuit transmits a signal indicating that the signal from the safety device has been output to the control microcomputer on the basis of the output logic, and the control microcomputer detects, upon reception of the signal from the input circuit, the abnormality of the elevator control device on the basis of the comparison result of the signal with the assumed value based on the fetching condition, and controls the elevator.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an elevator controller, and is suitable for application to an elevator controller that takes in a contact signal from a safety device related to an elevator and controls the elevator.

  In general, it is known that contact signals from elevator elevators and elevator safety devices installed in hoistways, etc. are indirectly captured by a printed circuit board equipped with a control microcomputer via relays and photocouplers. Yes. As this type of technology, in a control device equipped with a printed circuit board, a deterioration detection wiring that is equal to or longer than the minimum insulation distance of the printed circuit board, and a deterioration determination circuit that detects whether there is a decrease in insulation resistance connected to the wiring And an integration circuit that integrates signals that detect the presence or absence of a decrease in insulation resistance, and an abnormal signal generation circuit that generates an abnormal signal corresponding to the number of integrations of the integration circuit, and sequentially diagnoses the deterioration status of the deterioration detection wiring Therefore, a configuration for preventing a short circuit due to ion migration and a disconnection due to corrosion is disclosed (see Patent Document 1).

JP 2009-264989 A

  However, in the technique described in Patent Document 1, deterioration in the deterioration detection wiring can be detected in advance, but deterioration cannot be detected directly in a place where the deterioration detection wiring is not arranged. It is difficult to prevent a short circuit due to ion migration.

  The present invention has been made in consideration of the above points, and intends to propose an elevator control device and an elevator control method capable of detecting an abnormality caused by ion migration and the like and controlling the elevator without providing a deterioration detection wiring. Is.

  In order to solve this problem, in the present invention, at least one input circuit that receives a signal from a safety device related to an elevator, a control microcomputer that controls the elevator based on a signal received from the input circuit, and When a signal indicating a capture condition for assuming a signal received from the input circuit is received from the control microcomputer, and the signal received from the safety device by the input circuit based on the capture condition is output to the control microcomputer And a setting circuit that transmits a signal indicating an output logic to the input circuit, wherein the input circuit transmits a signal output from the safety device according to the output logic to the control microcomputer. When the control microcomputer receives a signal from the input circuit, a ratio between the signal and an assumed value based on the capture condition is Based on the results to detect the abnormality of the elevator control device, and to control the elevator.

  In the present invention, at least one input circuit that receives a signal from a safety device related to an elevator, a control microcomputer that controls the elevator based on a signal received from the input circuit, and an input circuit that receives the signal from the input circuit A signal indicating an output logic when a signal indicating a capture condition for assuming a signal is received from the control microcomputer, and a signal received from the safety device by the input circuit is output to the control microcomputer based on the capture condition And a setting circuit that transmits the signal to the input circuit, the elevator control method performed by the elevator control device, wherein the input circuit transmits a signal output from the safety device according to the output logic to the control microcomputer And when the control microcomputer receives a signal from the input circuit, the signal and the capture condition Based on the comparison result between the assumed value to detect the abnormality of the elevator control apparatus according to as provided, and a second step of controlling the elevator.

  According to the present invention, it is possible to detect an abnormality due to ion migration or the like and control the elevator without providing a deterioration detection wiring.

  According to the present invention, it is possible to realize an elevator control device and an elevator control method capable of detecting an abnormality caused by ion migration or the like and controlling the elevator without providing a deterioration detection wiring.

It is a block diagram which shows the structure of the elevator safety signal control apparatus by this Embodiment. It is a flowchart which shows the abnormality detection process by the elevator safety signal control apparatus by this Embodiment.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) 1st Embodiment FIG. 1: shows the structure of the elevator safety signal control apparatus 100 by this Embodiment. The elevator safety signal control device 100 is a printed circuit board, a safety device input circuit or the like, and includes two systems of input circuits 2 and 3, a capture condition output circuit 4, and a control microcomputer 5.

  The control microcomputer 5 outputs a capture condition command signal 11 for instructing an output (capture condition) from the input circuits 2 and 3 to the capture condition output circuit 4, and the capture condition output circuit 4 is based on the capture condition command signal 11. The input circuits 2 and 3 output capture condition signals 12a and 12b that specify what logic the safety device signal 10 is output to the control microcomputer 5.

  The input circuits 2 and 3 receive (input) the safety device signal 10 output from the safety device 1 related to the elevator installed in the elevator car, the hoistway, etc., and the output designated by the capture condition output circuit 4 Safety device input signals 13a and 13b are output according to logic.

  The control microcomputer 5 receives (inputs) the safety device input signals 13a and 13b output from the input circuits 2 and 3, and compares the logic between the output capture condition command signal 11 and the input safety device input signals 13a and 13b. The presence or absence of abnormality is detected from the result. In addition, the control microcomputer 5 outputs an elevator control signal 14 for driving the contactor 7 that supplies or cuts off the elevator main power supply 6 to the motor 8 according to the detection result to the contactor 7 and issues a failure to the outside. The failure signal 15 is output to the failure notification circuit 9.

  Here, the capture condition signals 12a and 12b output from the capture condition output circuit 4 are safety device input signals 13a output from two input circuits 2 and 3 so that an abnormality can be detected even when the signals are short-circuited. 13b is always given as a mismatch. That is, according to this configuration, an abnormality can be detected even when signals are short-circuited. For example, the wirings of the safety device input signals 13a and 13b can be provided close to each other. In addition, for example, wiring between the safety device input signals 13a and 13b and other signals can be provided close to each other.

  The capturing condition command signal 11 output from the control microcomputer 5 is switched according to the capturing period of the safety device input signals 13a and 13b input to the control microcomputer 5. If the safety device signal 10 output from the safety device 1 is periodically turned on / off like a door opening / closing signal, the safety device input signals 13a and 13b are also periodically switched. Therefore, if either signal is short-circuited because of the ON / OFF operation, the safety device input signal 13a and 13b can be detected abnormally because of the matching condition, but the safety device signal 10 output from the safety device 1 can be detected. When the signal is normally OFF, such as a stop switch signal, no periodic signal change occurs. Therefore, if either of the safety device input signals 13a, 13b is short-circuited and an OFF failure occurs, it can be distinguished from normal operation. This is because it cannot be detected.

  Here, it is desirable that the timing (timing) for switching the capture condition command signal 11 is sequentially switched after the capture of the safety device input signals 13a and 13b is completed, but at the minimum, it is switched within a time when the elevator is not in an unsafe state. To detect an error. For example, the timing for switching the capture condition command signal 11 may be periodically set as a time shorter than the time related to the stop control of the elevator.

  FIG. 2 shows a procedure of signal capture processing (abnormality detection processing) by the elevator safety signal control device 100 described above.

  In accordance with the safety signal capture program of the control microcomputer 5, the control microcomputer 5 switches the capture condition command signal 11 to the capture condition output circuit 4 from “L” to “H” (step S1). That is, the control microcomputer 5 commands the capture condition command signal 11 “H” to the capture condition output circuit 4. For example, when the safety device signal 10 is a contact OFF signal, the input circuit 2 causes the safety device input signal 13 a. When “H” (input circuit 3 is safety device input signal 13b “L”) and the safety device signal 10 is a contact ON signal, input circuit 2 is safety device input signal 13a “L” (input circuit 3). Can be expected to be returned by the safety device input signal 13b "H").

  The capture condition output circuit 4 switches the capture condition signal 12a of the input circuit 2 from “L” to “H”, and the capture condition signal 12b of the input circuit 3 from “H” to “L” (step S2). More specifically, the capture condition output circuit 4 transmits the capture condition signal 12 a “H” to the input circuit 2 and transmits the capture condition signal 12 b “L” to the input circuit 3.

  The input circuits 2 and 3 receive the safety device signal 10 output from the safety device 1, and output the safety device input signals 13a and 13b according to the capture condition signals 12a and 12b (step S3).

  The control microcomputer 5 determines the state of the input circuits 2 and 3 from the output capture condition command signal 11 and the received safety device input signals 13a and 13b (step S4), and outputs a flag for the failure state according to the state. (Step S5). More specifically, when the input circuit 2 receives the safety device input signal 13a “H” and the input circuit 3 receives the safety device input signal 13b “L”, the control microcomputer 5 receives the safety device signal 10a “H”. Since it is an OFF signal (the safety device contact is “OFF”), the safety input flag is set to “OFF” (step S5A). In addition, when the input circuit 2 receives the safety device input signal 13a "L" and the input circuit 3 receives the safety device input signal 13b "L", the control microcomputer 5 causes an OFF failure in the circuit including the input circuit 2. Therefore, the failure flag of the input circuit 2 is set to “ON” (step S5B). In addition, when the input circuit 2 receives the safety device input signal 13a “H” and the input circuit 3 receives the safety device input signal 13b “H”, the control microcomputer 5 causes the circuit including the input circuit 3 to turn on. Therefore, the failure flag of the input circuit 3 is set to “ON” (step S5C). In addition, when the input circuit 2 receives the safety device input signal 13a “L” and the input circuit 3 receives the safety device input signal 13b “H”, the control microcomputer 5 outputs the safety device signal 10 as the contact ON signal (safety ON signal). Since the device contact is “ON”), the safety input flag is set to “ON” (step S5D).

  The control microcomputer 5 switches the capture condition command signal 11 to the capture condition output circuit 4 from “H” to “L” (step S6). That is, the control microcomputer 5 commands the capture condition command signal 11 “L” to the capture condition output circuit 4. For example, when the safety device signal 10 is a contact OFF signal, the input circuit 2 causes the safety device input signal 13 a. When “L” (input circuit 3 is safety device input signal 13b “H”) and the safety device signal 10 is a contact ON signal, input circuit 2 is safety device input signal 13a “H” (input circuit 3). Can be expected to be returned by the safety device input signal 13b "L").

  The capture condition output circuit 4 switches the capture condition signal 12a of the input circuit 2 from “H” to “L” and the capture condition signal 12b of the input circuit 3 from “L” to “H” (step S7). More specifically, the capture condition output circuit 4 transmits a capture condition signal 12 a “L” to the input circuit 2 and transmits a capture condition signal 12 b “H” to the input circuit 3.

  The input circuits 2 and 3 receive the safety device signal 10 output from the safety device 1, and output the safety device input signals 13a and 13b according to the capture condition signals 12a and 12b (step S8).

  The control microcomputer 5 determines the state of the input circuits 2 and 3 from the output capture condition command signal 11 and the received safety device input signals 13a and 13b (step S9), and outputs a flag for the failure state according to the state. (Step S10). More specifically, when the input circuit 2 receives the safety device input signal 13a “L” and the input circuit 3 receives the safety device input signal 13b “H”, the control microcomputer 5 receives the safety device signal 10a “L”. Since the signal is an OFF signal (the safety device contact is “OFF”), the safety input flag is set to “OFF” (step S10A). In addition, when the input circuit 2 receives the safety device input signal 13a “H” and the input circuit 3 receives the safety device input signal 13b “H”, the control microcomputer 5 causes the circuit including the input circuit 2 to fail. Therefore, the failure flag of the input circuit 2 is set to “ON” (step S10B). In addition, when the input circuit 2 receives the safety device input signal 13a “L” and the input circuit 3 receives the safety device input signal 13b “L”, the circuit including the input circuit 3 has an OFF failure. Therefore, the failure flag of the input circuit 3 is set to “ON” (step S10C). In addition, when the input circuit 2 receives the safety device input signal 13a “H” and the input circuit 3 receives the safety device input signal 13b “L”, the control microcomputer 5 receives the safety device signal 10a “H”. Since the device contact is “ON”), the safety input flag is set to “ON” (step S10D).

  From the above safety signal fetching program operation, the control microcomputer 5 confirms the flag signal (step S11), and according to the result, outputs the elevator control signal 14 to turn the contactor 7 ON / OFF to control the drive. If a failure is detected, a failure signal 15 is output to the failure notification circuit 9 (step S12). More specifically, when the safety input flag is “OFF”, the failure flag of the input circuit 2 is “OFF”, and the failure flag of the input circuit 3 is “OFF”, the control microcomputer 5 Control is continued (elevator control output is continued ON) (step S12A). Further, when the safety input flag is “ON”, the failure flag of the input circuit 2 is “OFF”, and the failure flag of the input circuit 3 is “OFF”, the control microcomputer 5 controls the elevator to stop (elevator Control output OFF) (step S12B). Further, the control microcomputer 5 turns the elevator when the safety input flag is “ON” or “OFF”, the failure flag of the input circuit 2 is “ON”, and the failure flag of the input circuit 3 is “OFF”. The stop control is performed, and a failure notification circuit 9 is notified that the circuit including the input circuit 2 has failed (input circuit failure notification) (step S12C). Further, the control microcomputer 5 turns the elevator when the safety input flag is “ON” or “OFF”, the failure flag of the input circuit 2 is “OFF”, and the failure flag of the input circuit 3 is “ON”. The stop control is performed, and a failure notification circuit 9 is notified that the circuit including the input circuit 3 has failed (input circuit failure notification) (step S12D).

  According to such a configuration, the elevator safety signal control device 100 (more specifically, by the command from the control microcomputer 5 and the safety device input signals 13a and 13b from the input circuits 2 and 3 according to the command). , Elements related to the input system of the safety device signal 10, for example, the input circuit 2, the input circuit 3, the capture condition output circuit 4, the wiring related to the capture condition command signal 11, the wiring related to the capture condition signal 12a, and the capture condition signal 12b The abnormality (at least one of short circuit and disconnection) of the wiring, the wiring related to the safety device input signal 13a, and the wiring related to the safety device input signal 13b) can be easily detected. Moreover, since the abnormality in the elevator safety signal control device 100 can be detected immediately, the reliability of the elevator safety signal control device 100 can be improved.

(2) Other Embodiments In the above-described embodiment, the case where an elevator is applied has been described. However, the present invention is not limited to this and can be widely applied to other types of elevators such as escalators. .

  In the above-described embodiment, the case where the present invention is applied to the two systems of the input circuits 2 and 3 has been described. However, the present invention is not limited to this, and one system of the input circuit or three or more systems. The present invention can be widely applied to elevator control devices including an input circuit.

  In the above-described embodiment, the first switching is performed (after the capturing condition command signal 11 is switched from “L” to “H”), and the second switching is performed (the capturing condition command signal 11 is changed to “H”). However, the present invention is not limited to this. The input signal determination is performed one or more times in the first switching, and then the input signal determination is performed in the second switching. You may make it the structure performed once or several times.

  In the above-described embodiment, the determination result by the first switching (result of the input signal when the capturing condition command signal 11 is switched from “L” to “H”) and the determination result by the second switching (capturing) Although the case where the elevator is controlled based on the condition command signal 11 based on the result of the input signal when the condition command signal 11 is switched from “H” to “L” has been described, the present invention is not limited to this, and the first switching Based on the determination result, the determination result by the second switching, and the determination result by the third switching (again, the result of the input signal when the capture condition command signal 11 is switched from “L” to “H”) You may make it perform control of. More broadly, a configuration may be adopted in which the presence / absence of an abnormality is determined after switching the capture condition command signal 11 three times or more.

  DESCRIPTION OF SYMBOLS 1 ... Safety device, 2, 3 ... Input circuit, 4 ... Capture condition output circuit, 5 ... Control microcomputer, 6 ... Elevator main power supply, 7 ... Contactor, 8 ... Motor, 9 ... Failure occurrence Information circuit, 100 ... Elevator safety signal control device

Claims (4)

At least one input circuit for receiving a signal from a safety device related to an elevator, a control microcomputer for controlling the elevator based on a signal received from the input circuit, and a signal received from the input circuit A signal indicating a capture condition is received from the control microcomputer, and a signal indicating an output logic when the input circuit outputs a signal received from the safety device to the control microcomputer based on the capture condition is transmitted to the input circuit. An elevator control device comprising:
The input circuit transmits a signal output from the safety device according to the output logic to the control microcomputer,
When the control microcomputer receives a signal from the input circuit, the control microcomputer detects an abnormality of the elevator controller based on a comparison result between the signal and an assumed value based on the capturing condition, and controls the elevator.
An elevator controller characterized by that. The control microcomputer switches the capture condition;
The elevator control device according to claim 1. Two or more input circuits are provided,
The control microcomputer transmits a signal indicating an acquisition condition to the setting circuit so that signals based on output logic from adjacent input circuits are inconsistent with each other,
The elevator control device according to claim 1 or 2. At least one input circuit for receiving a signal from a safety device related to an elevator, a control microcomputer for controlling the elevator based on a signal received from the input circuit, and a signal received from the input circuit A signal indicating a capture condition is received from the control microcomputer, and a signal indicating an output logic when the input circuit outputs a signal received from the safety device to the control microcomputer based on the capture condition is transmitted to the input circuit. An elevator control method performed by an elevator control device comprising:
A first step in which the input circuit transmits a signal output from the safety device according to the output logic to the control microcomputer;
When the control microcomputer receives a signal from the input circuit, a second step of detecting an abnormality of the elevator control device based on a comparison result between the signal and an assumed value based on the capture condition and controlling the elevator; ,
The elevator control method characterized by comprising.

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