CN-115636328-B - Diagnostic device for passenger conveyor

CN115636328BCN 115636328 BCN115636328 BCN 115636328BCN-115636328-B

Abstract

A diagnostic device for a passenger conveyor, which can improve the diagnostic accuracy of an escalator. A diagnostic device (4) of an escalator records a signal acquired from an acquisition object detector after the escalator is installed as reference data. A diagnostic device (4) records, as diagnostic data, a signal acquired from an acquisition target detector after recording reference data. The diagnostic device (4) compares the diagnostic data with the reference data during operation in the normal operation mode to determine whether or not the target equipment is abnormal. The detector group (20) includes at least any one of a speed detector, a state detector, a current detector, and a voltage detector.

Inventors

NISHIOKA RYOTA

Assignees

三菱电机株式会社

Dates

Publication Date: 20260505
Application Date: 20210923
Priority Date: 20210719

Claims (3)

1. A diagnostic device of a passenger conveyor, wherein, The diagnosis device of the passenger conveyor comprises a diagnosis device main body which diagnoses whether an abnormality exists in a diagnosis object device which is at least any one device in a plurality of devices arranged on the passenger conveyor, The diagnostic device body has: A signal acquisition unit that acquires a signal from at least one acquisition target detector; A reference data recording unit that records, as reference data, a signal acquired by the signal acquisition unit after installation of the passenger conveyor; a diagnostic data recording unit for recording the signal acquired by the signal acquisition unit after the reference data is recorded by the reference data recording unit as diagnostic data, and A determination unit that determines whether or not the diagnosis target device is abnormal by comparing the diagnosis data with the reference data in an operation in a normal operation mode of the passenger conveyor, which is a mode of conveying passengers, The at least one acquisition object detector is at least one of a speed detector that detects a speed of the diagnostic object device, a state detector that detects a state change of the diagnostic object device, a current detector that detects a current flowing through the diagnostic object device, and a voltage detector that detects a voltage applied to the diagnostic object device, The diagnostic device main body diagnoses whether or not two or more diagnostic devices are abnormal, The diagnostic apparatus main body further includes an estimating unit that estimates, when the passenger conveyor is abnormally stopped, a cause device among the two or more diagnostic target devices, which is a diagnostic target device that is a cause of the abnormal stop of the passenger conveyor, The estimating unit uses, as the cause device, a diagnosis target device that is initially determined to be abnormal among the two or more diagnosis target devices.
2. The diagnostic device of a passenger conveyor according to claim 1, wherein, The reference data and the diagnostic data are data acquired at times including a switching time between a stopped state and an operating state of the passenger conveyor, The determination unit compares the diagnostic data with the reference data by matching the switching time in the reference data with the switching time in the diagnostic data.
3. The diagnostic device of a passenger conveyor according to claim 1 or 2, wherein, The diagnostic device main body diagnoses whether or not there is an abnormality in a plurality of steps serving as the diagnostic device, a brake serving as the diagnostic device that brakes movement of the plurality of steps, and a drive chain serving as the diagnostic device that transmits a driving force to the plurality of steps, The signal acquisition unit acquires a signal from a step speed detector that detects the moving speed of the plurality of steps, the step speed detector being the speed detector, a signal from a brake release detector that detects that the brake is released, the brake release detector being the state detector, and a signal from a switch state detector that detects the state of a switch that detects the drive chain breakage, the switch state detector being the state detector.

Description

Diagnostic device for passenger conveyor Technical Field The present invention relates to a diagnostic device for a passenger conveyor. Background In a conventional abnormality diagnosis system, whether or not a passenger conveyor is abnormal is determined by comparing sound data of an operation sound of the passenger conveyor with reference data in a state where the abnormal sound is not included (for example, refer to patent document 1). Prior art literature Patent literature Patent document 1 Japanese patent laid-open publication No. 2010-18385 Disclosure of Invention In the diagnosis by the conventional abnormality diagnosis system as described above, the sound emitted from the outside of the passenger conveyor is also detected. Therefore, when sound of the same quality as the sound determined as the abnormal sound frequency pattern is emitted from the outside, although the passenger conveyor is normal, the diagnosis result may be "abnormal". The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a diagnostic device for a passenger conveyor that can improve the diagnostic accuracy. The diagnosis device for the passenger conveyor of the invention comprises a diagnosis device main body, wherein the diagnosis device main body is used for diagnosing whether an abnormality exists in a diagnosis object device which is at least one device in a plurality of devices arranged on the passenger conveyor. The diagnostic device body has a signal acquisition unit that acquires a signal from at least one acquisition object detector. The diagnostic device main body has a reference data recording unit that records, as reference data, a signal acquired by the signal acquisition unit after the passenger conveyor is installed. The diagnostic device main body has a diagnostic data recording unit that records, as diagnostic data, a signal acquired by the signal acquisition unit after the reference data recording unit records the reference data. The diagnostic device main body has a determination unit that determines whether or not the diagnostic device is abnormal by comparing the diagnostic data with the reference data during the operation of the passenger conveyor in the normal operation mode, which is the mode of conveying passengers. The at least one acquisition object detector is at least one of a speed detector that detects a speed of the diagnosis object device, a state detector that detects a state change of the diagnosis object device, a current detector that detects a current flowing through the diagnosis object device, and a voltage detector that detects a voltage applied to the diagnosis object device. Effects of the invention According to the diagnosis device of the passenger conveyor, the diagnosis precision can be improved. Drawings Fig. 1 is a side view showing a schematic structure of an escalator of embodiment 1. Fig. 2 is a block diagram showing a diagnostic system of the escalator of embodiment 1. Fig. 3 is a block diagram showing details of the diagnostic apparatus shown in fig. 2. Fig. 4 is a flowchart showing a diagnostic process performed by the diagnostic apparatus main body of fig. 3. Fig. 5 is a diagram showing reference data of the step speed detected by the step speed detector shown in fig. 2. Fig. 6 is a diagram showing diagnostic data of the step speed detected by the step speed detector shown in fig. 2. Fig. 7 is a diagram obtained by matching the time elapsed in the reference data shown in fig. 5 with the time elapsed in the diagnostic data shown in fig. 6. Fig. 8 is a block diagram showing the details of the diagnostic device according to embodiment 2. Fig. 9 is a diagram illustrating an example of the diagnostic process performed by the diagnostic device main body shown in fig. 8. Fig. 10 is a block diagram showing an example 1 of a processing circuit for realizing the functions of the diagnostic devices according to embodiments 1 and 2. Fig. 11 is a block diagram showing an example 2 of a processing circuit for realizing the functions of the diagnostic devices according to embodiments 1 and 2. Description of the reference numerals 4, Diagnostic device, 6, moving handrail (diagnostic device), 7, multiple steps (diagnostic device), 8a, brake (diagnostic device), 15, drive chain (diagnostic device), 21, step speed detector (acquisition object detector, speed detector), 25, motor current detector (acquisition object detector, current detector), 26, motor voltage detector (acquisition object detector, voltage detector), 28, brake release detector (acquisition object detector, status detector), 31, switch status detector (acquisition object detector, status detector), 40, diagnostic device body, 41, signal acquisition unit, 42a, reference data recording unit, 42b, diagnostic data recording unit, 43, judgment unit, 46, estimation unit, 100, escalator (passenger conveyor). Detailed Description Hereinafter, embodiments will be d