Diagnostic device for a passenger conveyor

Abstract

The diagnostic device for passenger conveyors aims to provide a diagnostic device for escalators that can improve diagnostic accuracy. The escalator diagnostic device (4) records the signals obtained from the object detector after the escalator is installed as reference data. The diagnostic device (4) records the signals obtained from the object detector after recording the reference data as diagnostic data. During operation in normal operating mode, the diagnostic device (4) determines whether the object equipment has any abnormalities by comparing the diagnostic data and the reference data. The detector group (20) includes at least one of a speed detector, a status detector, a current detector, and a voltage detector.

Description

Technical Field

[0001] This invention relates to a diagnostic device for passenger conveyors. Background Technology

[0002] In existing anomaly diagnosis systems, the presence or absence of anomalies in a passenger conveyor is determined by comparing the sound data of the passenger conveyor's operating sounds with baseline data in a state without abnormal sounds (for example, see Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2010-18385 Summary of the Invention

[0006] In the existing anomaly diagnostic system described above, sounds emitted from outside the passenger conveyor are also detected. Therefore, when a sound of the same quality as the frequency pattern of an abnormal sound is emitted from outside, the diagnostic result may still be "abnormal" even if the passenger conveyor is functioning normally.

[0007] The present invention was made to solve the problems mentioned above, and its object is to obtain a diagnostic device for passenger conveyors that can improve diagnostic accuracy.

[0008] The diagnostic device for a passenger conveyor of the present invention includes a diagnostic device body that diagnoses whether a target device, which is at least one of a plurality of devices installed on the passenger conveyor, has any abnormality. The diagnostic device body has a signal acquisition unit that acquires signals from at least one acquisition target detector. The diagnostic device body has a reference data recording unit that records the signals acquired by the signal acquisition unit after the passenger conveyor is installed as reference data. The diagnostic device body has a diagnostic data recording unit that records the signals acquired by the signal acquisition unit after the reference data recording unit has recorded the reference data as diagnostic data. The diagnostic device body has a determination unit that, during the operation of the passenger conveyor in a normal operating mode (passenger transport mode), determines whether the target device has any abnormality by comparing the diagnostic data and the reference data. The at least one acquisition target detector is at least one of the following: a speed detector that detects the speed of the target device, a state detector that detects changes in the state of the target device, a current detector that detects the current flowing through the target device, and a voltage detector that detects the voltage applied to the target device.

[0009] Invention Effects

[0010] The diagnostic device for passenger conveyors according to the present invention can improve the accuracy of diagnosis. Attached Figure Description

[0011] Figure 1 This is a side view showing the schematic structure of the escalator according to Embodiment 1.

[0012] Figure 2 This is a block diagram illustrating the diagnostic system for the escalator according to Embodiment 1.

[0013] Figure 3 It is shown Figure 2 A block diagram showing the details of the diagnostic device.

[0014] Figure 4 It is shown Figure 3 The flowchart shows the diagnostic processing performed by the main body of the diagnostic device.

[0015] Figure 5 It is shown by Figure 2 The graph shown is a reference data of the step speed detected by the step speed detector.

[0016] Figure 6 It is shown by Figure 2 The diagram shows the diagnostic data of the step velocity detected by the step velocity detector.

[0017] Figure 7 Is to make Figure 5 The time elapsed in the reference data shown is... Figure 6 The diagram shown is obtained by aligning the time intervals in the diagnostic data.

[0018] Figure 8 This is a block diagram showing the details of the diagnostic device according to Embodiment 2.

[0019] Figure 9 This is an explanation Figure 8 The diagram shows an example of a diagnostic process performed by the main body of the diagnostic device.

[0020] Figure 10 This is a structural diagram showing a first example of the processing circuit that implements the functions of the diagnostic device in embodiments 1 and 2.

[0021] Figure 11 This is a structural diagram of a second example of the processing circuit that implements the functions of the diagnostic device in embodiments 1 and 2.

[0022] Label Explanation

[0023] 4: Diagnostic device; 6: Moving handrail (device to be diagnosed); 7: Multiple steps (device to be diagnosed); 8a: Brake (device to be diagnosed); 15: Drive chain (device to be diagnosed); 21: Step speed detector (acquisition detector, speed detector); 25: Motor current detector (acquisition detector, current detector); 26: Motor voltage detector (acquisition detector, voltage detector); 28: Brake release detector (acquisition detector, status detector); 31: Switch status detector (acquisition 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 Implementation

[0024] The embodiments will now be described with reference to the accompanying drawings.

[0025] Implementation Method 1

[0026] Figure 1 This is a side view showing the schematic structure of the escalator 100 according to Embodiment 1. Figure 1 In this structure, truss 1 is erected between the lower and upper layers. Furthermore, truss 1 has an upper section, a lower section, and a middle inclined section. The upper section is located on the upper layer. The lower section is located on the lower layer. The middle inclined section connects the upper section and the lower section.

[0027] The truss 1 has multiple steps 7. The multiple steps 7 are connected into a loop by a pair of step chains (not shown).

[0028] A diagnostic device 4, a drive device 8, and an upper sprocket 9 are provided in the upper part of the truss 1. A lower sprocket 11 is provided in the lower part of the truss 1. Each step chain is wound around the upper sprocket 9 and the lower sprocket 11.

[0029] The drive unit 8 includes a motor (not shown), a brake 8a, and a drive sprocket 8b. The motor rotates the drive sprocket 8b. The rotation of the drive sprocket 8b is transmitted to the upper sprocket 9 via the drive chain 15. The rotation of the upper sprocket 9 causes the multiple steps 7 to move. On the other hand, the brake 8a brakes the motor.

[0030] A pair of railings 5 ​​and a pair of movable handrails 6 are provided on truss 1. Figure 1 The image shows only one of a pair of railings 5 ​​and one of a pair of movable handrails 6. Each movable handrail 6 is located on its corresponding railing 5.

[0031] A handrail drive device 12 is provided in the middle inclined section of the truss 1. The rotation of the upper sprocket 9 is transmitted to the handrail drive device 12. The handrail drive device 12 causes a pair of movable handrails 6 to move in the same direction as the plurality of steps 7.

[0032] Multiple control panels 14 are provided on one side of a pair of railings 5. Each control panel 14 is equipped with a start button switch, a stop button switch, and an emergency stop button. The start button switch is used to start the escalator 100. The stop button switch is used to stop the escalator 100. The emergency stop button is used to stop the escalator 100 in an emergency.

[0033] Figure 2 This is a block diagram illustrating the diagnostic system of the escalator 100 according to Embodiment 1. The diagnostic system 200 includes a diagnostic device 4, a detector group 20, and a notification device 3.

[0034] The diagnostic device 4 includes a diagnostic device body 40. The diagnostic device body 40 diagnoses whether there is any abnormality in the diagnostic target device, which is at least one of the multiple devices installed on the escalator 100. In addition, in Embodiment 1, the diagnostic target device is the device that is detected by the detector group 20, such as multiple steps 7, drive chain 15, moving handrail 6, motor, brake 8a, etc.

[0035] Detector group 20 contains multiple target detectors. Each target detector is any one of a velocity detector, a state detector, a current detector, and a voltage detector.

[0036] A speed detector is a detector that measures the speed of the device being diagnosed. A state detector is a detector that measures changes in the state of the device being diagnosed. A current detector is a detector that measures the current flowing through the device being diagnosed. A voltage detector is a detector that measures the voltage applied to the device being diagnosed.

[0037] exist Figure 2 In the diagram, step speed detector 21, handrail speed detector 23, and motor speed detector 24 are shown as speed detectors. Furthermore, in... Figure 2 In the diagram, the following are shown as status detectors: step status detector 22, brake release detector 28, lifting status detector 29, stop detector 30, and switch status detector 31.

[0038] also, Figure 2 In the diagram, a motor current detector 25 and a brake current detector 27 are shown as current detectors. Furthermore, Figure 2 In the diagram, motor voltage detector 26 is shown as a voltage detector.

[0039] The step speed detector 21 detects the moving speed of multiple steps 7. Multiple objects to be detected are arranged at predetermined intervals along the circumference on any of the drive sprocket 8b, upper sprocket 9, or lower sprocket 11. The step speed detector 21 uses a sensor to count the number of times each object passes by per unit time. Then, the step speed detector 21 obtains the moving speed of the multiple steps 7 by substituting the count values ​​into a predetermined conversion formula.

[0040] The step status detector 22 detects the absence of steps 7. The step status detector 22 is a sensor fixed inside the truss 1, which detects the presence or absence of each step 7 by illuminating multiple passing steps 7.

[0041] The handrail speed detector 23 detects the moving speed of a pair of movable handrails 6. Multiple objects to be detected are arranged at predetermined intervals along the circumference of the handrail sprocket of the handrail drive device 12. The handrail speed detector 23 uses a sensor to count the number of times each object passes by per unit time. Then, the handrail speed detector 23 obtains the moving speed of the pair of movable handrails 6 by substituting the count value into a predetermined conversion formula.

[0042] The motor speed detector 24 detects the motor speed. The drive unit 8 is equipped with a rotary encoder that detects the motor's rotation direction, position, and speed. In this example, the rotary encoder functions as the motor speed detector 24.

[0043] Motor current detector 25 detects the current flowing through the motor. Motor voltage detector 26 detects the voltage applied to the motor.

[0044] The braking current detector 27 detects the current flowing through the brake 8a when the brake 8a is engaged. The brake release detector 28 detects the on / off state changes of the microswitch that controls the release of the brake 8a. Thus, the brake release detector 28 detects when the brake 8a has been released.

[0045] The lifting status detector 29 detects the operating direction of the escalator 100 by detecting the rotation direction of the start key switch located on the control panel 14. The stop detector 30 detects whether the stop key switch or emergency stop button on the control panel 14 has been activated.

[0046] A switch status detector 31 is installed in the safety device 16. In the event of an abnormality such as a breakage of the drive chain 15 causing the escalator 100 to malfunction, the safety device 16 abnormally stops the movement of multiple steps 7. The switch status detector 31 detects the operational status of the relay switch used for abnormal stopping installed within the safety device 16. Thus, the switch status detector 31 detects the status of the relay switch used for abnormal stopping when a breakage of the drive chain 15 is detected.

[0047] Each acquired object detector is connected to the diagnostic device 4. Thus, the diagnostic device 4 is able to receive the detection signals output from each acquired object detector.

[0048] Furthermore, when the diagnostic device 4 determines that the device being diagnosed has malfunctioned, the diagnostic device 4 will notify the notification device 3.

[0049] The notification device 3 receives notification instructions from the diagnostic device 4 and notifies maintenance personnel, users, etc., of the abnormal status. The notification device 3 may be, for example, a display screen or a warning light.

[0050] Figure 3 It is shown Figure 2 A block diagram showing the details of the main body 40 of the diagnostic device.

[0051] The main body of the diagnostic device 40 has a signal acquisition unit 41, a reference data recording unit 42a, a diagnostic data recording unit 42b, a determination unit 43, a notification control unit 44, and a storage unit 45 as functional blocks.

[0052] The signal acquisition unit 41 acquires signals from all acquisition object detectors.

[0053] The reference data recording unit 42a records each signal acquired by the signal acquisition unit 41 after the escalator 100 is installed as reference data. Each reference data is stored in the storage unit 45.

[0054] Here, the reference data is explained. Reference data is the test data obtained after the escalator 100 is installed and used in normal operating mode. For example, reference data is the test data obtained when the escalator 100 is installed and initially switched to normal operating mode.

[0055] Furthermore, if the escalator 100 has been used in normal operating mode for more than one day, the installation can be considered complete. Therefore, the reference data recording unit 42a can automatically record the detection data as reference data when the escalator 100 has been used in normal operating mode for more than one day.

[0056] Furthermore, the reference data is data acquired within a timeframe including the transition between the stopped and running states of the escalator 100. In other words, the reference data is detection data acquired during the start-up or stop operation of the escalator 100.

[0057] The diagnostic data recording unit 42b records the signals acquired by the signal acquisition unit 41 after the reference data has been recorded by the reference data recording unit 42a as diagnostic data. Each piece of diagnostic data is stored in the storage unit 45.

[0058] Here, the diagnostic data will be explained. The diagnostic data is data obtained when the escalator 100 is used in its normal operating mode. Furthermore, the diagnostic data is data acquired within a timeframe including the time of transition between the stopped and running states of the escalator 100. That is, the diagnostic data is detection data acquired during the starting or stopping operation of the escalator 100.

[0059] When operating in normal mode, the escalator 100 stops primarily during the stop process before a maintenance check of the escalator 100 is performed. Furthermore, the escalator 100 starts primarily during the start process immediately after a maintenance check of the escalator 100 has been performed. Therefore, diagnostic data is primarily recorded by the diagnostic data recording unit 42b during maintenance checks.

[0060] During the normal operation of the escalator 100, which is used for transporting passengers, the determination unit 43 compares each diagnostic data with each reference data. Thus, the determination unit 43 determines whether any abnormality exists in the diagnostic equipment.

[0061] When the determination unit 43 determines that a certain diagnostic target device is abnormal, the notification control unit 44 instructs the notification device 3 to notify the outside of the determination result. The notification control unit 44 outputs notification data and notification instructions to the notification device 3. The notification data includes, for example, information about the diagnostic target device that has become abnormal, the value of the diagnostic data, the difference between the diagnostic data and the reference data, and information about the escalator 100.

[0062] Storage unit 45 stores operating status information, fault information, and clock information. Additionally, storage unit 45 stores reference data acquired by reference data recording unit 42a. Storage unit 45 also stores diagnostic data acquired by diagnostic data recording unit 42b.

[0063] The clock information is the current date and time obtained from the built-in clock of the diagnostic device 4.

[0064] When the operating state of the escalator 100 changes, along with the clock information, information showing the states before and after the change is also provided for the operating state information. In addition, information indicating the current operating state of the escalator 100 is also provided for the operating state information.

[0065] In addition, the escalator 100 has two operating states: "operating" and "stopped". Furthermore, "operating" is further subdivided into "stopped state", "acceleration state", "constant speed operation state", "deceleration state", and "standby operation state". Similarly, "stopped" is subdivided into "normal stop state", "abnormal stop state", and "emergency stop state".

[0066] In the error information, when an error occurs in escalator 100, an error determination code is recorded along with the clock information. The error determination code is a code information that determines the content of the error.

[0067] Next, the diagnostic processing performed by the diagnostic device 4 will be explained. Figure 4 It is shown Figure 3 The flowchart shows the diagnostic process performed by the main body 40 of the diagnostic device.

[0068] In step S101, the determination unit 43 obtains reference data and diagnostic data from the storage unit 45. Then, the determination unit 43 synchronizes the switching time between the stop state and the operating state in the reference data with the switching time between the stop state and the operating state in the diagnostic data. Thus, the determination unit 43 aligns the time signatures of the reference data and the diagnostic data.

[0069] use Figures 5 to 7 The process of step S101 will be explained in detail. Figure 5 It is shown by Figure 2 The graph shows the reference data of the step speed detected by the step speed detector 21. Figure 5 In the diagram, the horizontal axis represents time, and the vertical axis shows the speeds of multiple steps 7. Furthermore, Figure 5 The internal state of the escalator 100 is also shown. The internal state refers to information indicating whether the escalator 100 is in a stopped state or an operating state, and is recorded as operating state information in the storage unit 45.

[0070] like Figure 5 As shown, when the state of the escalator 100 changes from the stopped state to the running state, the multiple steps 7 are accelerated and then maintain the rated speed.

[0071] Figure 6 It is shown by Figure 2 The diagram shows diagnostic data of the step speed detected by the step speed detector 21. Figure 6In the diagram, each line is represented by a dashed line. Figure 6 In the diagnostic data, multiple steps 7 also maintained their speed after being accelerated.

[0072] Figure 7 Is to make Figure 5 The time elapsed in the reference data shown is... Figure 6 The diagram shown is obtained by aligning the time intervals in the diagnostic data.

[0073] The determination unit 43 synchronizes the switching times by sliding the time elapsed of either the reference data or the diagnostic data. Through this operation, the determination unit 43 aligns the time elapsed of the reference data with the time elapsed of the diagnostic data.

[0074] Furthermore, the determination unit 43 corrects for phase shifts between the reference data and the diagnostic data. In periodically changing signals such as voltage, current, and pulse waveforms, the possibility of misdiagnosis increases when the phases of the reference data and diagnostic data shift. Therefore, the determination unit 43 performs a periodic check to ensure phase alignment before comparing the reference data and the diagnostic data. When aligning the phase of a sine wave, the determination unit 43 determines and ensures that these zero-crossing points are consistent. Furthermore, when aligning the phase of a pulse waveform, the determination unit 43 determines and ensures that the edge positions of the pulse waveform are consistent.

[0075] Back Figure 4 The following is an explanation. After aligning the switching times of the reference data and diagnostic data, the determination unit 43 calculates the difference between the reference data and diagnostic data for each time interval in step S102. Then, in step S103, the determination unit 43 determines whether there is a time when the absolute value of the difference between the reference data and diagnostic data is above a threshold.

[0076] When the absolute value of the difference between the baseline data and the diagnostic data exceeds a threshold, the notification control unit 44 outputs the determination result to the notification device 3 in step S104. Then, the diagnostic device main body 40 ends. Figure 4 The flowchart shown illustrates the processing.

[0077] On the other hand, if there is no moment when the absolute value of the difference between the baseline data and the diagnostic data is above the threshold, the main body 40 of the diagnostic device ends. Figure 4 The flowchart shown illustrates the processing.

[0078] exist Figure 7 During the test, a speed difference exceeding threshold D1 occurred between the baseline data and the diagnostic data. Therefore, the determination unit 43 determined that multiple steps 7 were abnormal. Then, the notification control unit 44 output the determination result to the notification device 3.

[0079] In this diagnostic device 4, reference data and diagnostic data are generated using signals obtained from a speed detector, a state detector, a current detector, and a voltage detector. Therefore, compared to systems that use, for example, sound data for diagnosis, the diagnostic device 4 can reduce external influences and improve diagnostic accuracy.

[0080] Furthermore, during the operation of the escalator 100 in its normal operating mode, which is used for transporting passengers, the determination unit 43 determines whether the equipment to be diagnosed has any abnormalities by comparing diagnostic data with baseline data. That is, the determination unit 43 performs the diagnosis during normal operating mode. Therefore, it is possible to suppress the decrease in the operating efficiency of the escalator 100.

[0081] Furthermore, in the diagnostic device 4, the detection data obtained after the escalator 100 is installed is used as reference data. That is, the detection data obtained from the escalator 100 itself is used as reference data. Therefore, diagnosis can be performed without being affected by the differences in the initial state generated by each unit of the escalator 100.

[0082] Furthermore, the determination unit 43 compares the diagnostic data with the reference data after aligning the switching time in the reference data with the switching time in the diagnostic data. This reduces the occurrence of misdiagnosis and improves diagnostic accuracy.

[0083] Furthermore, the determination unit 43 uses detection data from start-up or stop operations when there are almost no passengers on board to perform the diagnosis. Therefore, the impact of passenger load can be reduced, and the accuracy of the diagnosis can be improved.

[0084] Furthermore, during the start-up of the escalator 100, almost all equipment operates and initialization processing is performed. Similarly, during the stop of the escalator 100, almost all equipment operates and stop processing is performed. Therefore, by collecting detection data during both start-up and stop operations, various detection data can be easily obtained.

[0085] Furthermore, diagnostic data for past quantities over a predetermined period can be stored in the storage unit 45. In this case, the determination unit 43 can easily determine the rate of deterioration by comparing the stored diagnostic data for past quantities with each other.

[0086] Furthermore, in Embodiment 1, the signal acquisition unit 41 is configured to acquire signals from all target detectors, but the method is not limited to this. That is, the signal acquisition unit 41 only needs to be able to acquire signals from at least one target detector.

[0087] Implementation Method 2

[0088] Figure 8This is a block diagram showing the details of the diagnostic device according to Embodiment 2.

[0089] In addition to a signal acquisition unit 41, a reference data recording unit 42a, a diagnostic data recording unit 42b, a determination unit 43, a notification control unit 44, and a storage unit 45, the main body 40 of the diagnostic device in Embodiment 2 also has an estimation unit 46 as a functional block.

[0090] In embodiment 2, the storage unit 45 stores exception response data. The exception response data refers to data obtained by mapping at least one exception determination code to two or more signal determination information. Furthermore, this exception response data... Figure 8 It is included in the error information.

[0091] Furthermore, in the event of an abnormal stop of the escalator 100, the determination unit 43 of Embodiment 2 determines two or more signals as diagnostic targets by referring to abnormal response data. The determination unit 43 of Embodiment 2 then determines whether there is an abnormality based on the two or more determined signals.

[0092] The estimation unit 46 estimates the cause of the abnormal stop of the escalator 100 among the diagnostic target devices corresponding to two or more signals that have been judged.

[0093] In addition, in addition to the notification data described in Embodiment 1, the notification control unit 44 of Embodiment 2 also outputs information related to the cause device estimated by the estimation unit 46 to the notification device 3.

[0094] Except for the above, the functions of the diagnostic device 4 and the structure of the escalator 100 are the same as in Embodiment 1.

[0095] Figure 9 This is an explanation Figure 8 The diagram shows an example of the diagnostic processing performed by the main body 40 of the diagnostic device. Here, we will take the case where, after the escalator 100 is started, multiple steps 7 gradually decelerate and come to an abnormal stop at time t3 as an example.

[0096] Furthermore, in this example, the data obtained by correlating the abnormal stop of the escalator 100 with the three signals—step speed, brake release signal, and drive chain breakage signal—is stored in the storage unit 45 as abnormal response data.

[0097] When the escalator 100 stops abnormally, the determination unit 43 determines whether there is an abnormality based on the abnormality response data, specifically the step speed, brake release signal, and drive chain breakage signal. The step speed is obtained from the step speed detector 21. The brake release signal is obtained from the brake release detector 28. Furthermore, the drive chain breakage signal is obtained from the safety device 16.

[0098] Next, the estimation unit 46 synchronizes the switching times between the stop state and the running state in each signal. As a result, the time elapsed for the step speed, the time elapsed for the brake release signal, and the time elapsed for the drive chain breakage signal are all synchronized.

[0099] Then, the estimation unit 46 takes the diagnostic device that was initially determined to be abnormal among two or more diagnostic device devices as the cause device.

[0100] exist Figure 9 In the example, at time t1, the absolute difference between the reference data and the diagnostic data of the brake release signal is above the threshold D2. At time t2, which is later than time t1, the absolute difference between the reference data and the diagnostic data of the step speed is above the threshold D1. On the other hand, no breakage of the drive chain 15 was detected. Therefore, the estimation unit 46 estimates the brake 8a, which initially became abnormal, as the causative device.

[0101] In this embodiment 2, the diagnostic device main body 40 uses signals detected from two or more target detectors to diagnose whether two or more target devices are malfunctioning. Then, in the event of an abnormal stop of the escalator 100, the estimation unit 46 identifies the target device initially determined to be malfunctioning among the two or more target devices as the cause device. Therefore, the diagnostic device main body 40 can easily pinpoint the cause device in the event of an malfunction.

[0102] Furthermore, in the event of an abnormal stop of the escalator 100, the main body 40 of the diagnostic device in Embodiment 2 diagnoses whether there are any abnormalities in the multiple steps 7, the brake 8a that brakes the movement of the multiple steps 7, and the drive chain 15 that transmits driving force to the multiple steps 7.

[0103] Furthermore, the estimation unit 46 in Embodiment 2 identifies the device initially determined to be abnormal among the plurality of steps 7, brakes 8a, or drive chains 15 as the cause device. Therefore, in the event of an abnormal stop of the escalator 100, it is possible to identify any one of the plurality of steps 7, brakes 8a, or drive chains 15.

[0104] In addition, the diagnostic device 4 can also function as part of the drive device 8 that controls the drive of multiple steps 7.

[0105] In addition, passenger conveyors can also be moving walkways.

[0106] Furthermore, in embodiments 1 and 2, the determination unit 43 performs diagnosis after aligning the switching time between the stop state and the running state of the escalator 100. Alternatively, the determination unit 43 may align the switching time with a time other than this. For example, the determination unit 43 may also align the switching time from the stopped state to the accelerated state. Furthermore, the determination unit 43 may also align the switching time from the accelerated state to the constant speed running state.

[0107] Furthermore, in embodiments 1 and 2, the diagnostic device 4 is a device installed inside the escalator 100. In contrast, the diagnostic device 4 could also be a portable laptop computer, information communication terminal, or the like. Alternatively, the diagnostic device 4 could be a server located in a control center or similar facility.

[0108] Furthermore, each function of the diagnostic device main body 40 in Embodiment 1 is implemented by a processing circuit. Figure 10 This is a structural diagram showing a first example of the processing circuitry that implements the functions of the diagnostic device 4 according to Embodiment 1. The processing circuitry 50 in the first example is dedicated hardware.

[0109] The processing circuit 50 may be a single circuit, a composite circuit, a programming processor, a parallel programming processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof. Furthermore, each function of the diagnostic device 4 may be implemented by an independent processing circuit 50. Alternatively, each function of the diagnostic device 4 may be implemented centrally by the processing circuit 50.

[0110] also, Figure 11 This is a diagram showing a second example of the processing circuitry that implements the functions of the diagnostic device 4 in Embodiment 1. The processing circuitry 60 in the second example includes a processor 61 and a memory 62.

[0111] In the processing circuit 60, the functions of the diagnostic device 4 are implemented through software, firmware, or a combination of both. The software and firmware are described as programs. The software and firmware are stored in the memory 62. The processor 61 implements the functions of each part by reading and executing the programs stored in the memory 62.

[0112] The program stored in memory 62 can also be described as a program that causes the computer to execute the steps or methods described above. Here, memory 62 is, for example, a non-volatile or volatile semiconductor memory such as RAM (Random Access Memory), ROM (Read-Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), or EEPROM (Electrically Erasable Programmable Read Only Memory). Furthermore, disks, floppy disks, optical disks, CDs (compact disks), mini discs, and DVDs (Digital Versatile Disk) also correspond to memory 62.

[0113] The functions of the aforementioned components can be implemented partly through dedicated hardware and partly through software or firmware.

[0114] In this way, the processing circuit can implement the functions of the above-mentioned parts through hardware, software, firmware, or a combination thereof.

Claims

1. A diagnostic device for a passenger conveyor, wherein, The diagnostic device for the passenger conveyor includes a main body for diagnosing whether any one of the multiple devices installed on the passenger conveyor is malfunctioning. The main body of the diagnostic device has: A signal acquisition unit acquires signals from at least one acquisition target detector; The reference data recording unit records the signal acquired by the signal acquisition unit after the installation of the passenger conveyor as reference data; The diagnostic data recording unit records the signal acquired by the signal acquisition unit after the reference data is recorded by the reference data recording unit as diagnostic data; as well as The determination unit, during normal operation of the passenger conveyor in its passenger transport mode, determines whether the device under diagnosis has any abnormalities by comparing the diagnostic data with the reference data. The at least one target detector is at least one of the following: a speed detector for detecting the speed of the diagnostic target device, a state detector for detecting changes in the state of the diagnostic target device, a current detector for detecting the current flowing through the diagnostic target device, and a voltage detector for detecting the voltage applied to the diagnostic target device. The main body of the diagnostic device diagnoses whether two or more of the target devices have any abnormalities. The diagnostic device also includes an estimation unit that, in the event of an abnormal stop of the passenger conveyor, estimates the cause device among the two or more diagnostic target devices. This cause device is the diagnostic target device that is the cause of the abnormal stop of the passenger conveyor. The estimation unit takes the first diagnostic device that was initially determined to be abnormal among the two or more diagnostic target devices as the cause device.

2. The diagnostic device for a passenger conveyor according to claim 1, wherein, The baseline data and the diagnostic data are data obtained within a time period including the switching time between the stopped and running states of the passenger conveyor. The determination unit compares the diagnostic data with the reference data by aligning the switching time in the reference data with the switching time in the diagnostic data.

3. The diagnostic device for a passenger conveyor according to claim 1 or 2, wherein, The main body of the diagnostic device diagnoses whether there are any abnormalities in the multiple steps of the device under diagnosis, the brake of the device under diagnosis that brakes the movement of the multiple steps, and the drive chain of the device under diagnosis that transmits driving force to the multiple steps. The signal acquisition unit acquires signals from a step speed detector that detects the moving speed of the plurality of steps, a brake release detector that detects the release of the brake, and a switch status detector that detects the state of a switch that detects the breakage of the drive chain.

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