JP7215899B2 - Platform door maintenance support system, platform door maintenance support method - Google Patents

Description

The present invention relates to a platform door maintenance support system and a platform door maintenance support method.

Patent Literature 1 describes a platform door operation abnormality detection system that detects an operation abnormality of a platform door system. The system described in Patent Literature 1 collects operation logs of a control system that controls the system, and detects abnormal operation of the system based on comparison with design knowledge information that defines normal operation of the control system.

JP 2008-094299 A

The present inventor has obtained the following recognition regarding platform doors.
In a platform door having a drive mechanism for opening and closing the door on the platform, the drive mechanism may fail due to deterioration of components due to deterioration over time. Since platform door failures have a great impact on users, it is desirable to diagnose the deterioration state of components before failures occur, catch signs of failures, and prevent failures before they occur. The system described in Patent Document 1 detects an operational abnormality of the system from the control operation of the control system, and has a problem that it is difficult to accurately diagnose the deterioration state of the components of the drive mechanism.
From these, the present inventor recognized that the technique described in Patent Document 1 has room for improvement from the viewpoint of accurately diagnosing the deterioration state of the platform door drive mechanism.

The present invention has been made in view of these problems, and its object is to provide a platform door maintenance support system capable of accurately diagnosing the deterioration state of platform doors.

In order to solve the above-described problems, a platform door maintenance support system according to one aspect of the present invention includes an acquisition unit that acquires an electrical numerical value related to the motor as an acquired numerical value when the platform door is opened and closed by the motor; a determination unit that determines necessity of maintenance based on the numerical value.

According to this aspect, it is possible to determine whether or not maintenance is necessary based on the electrical numerical values relating to the motor.

In addition, any combination of the above, and the mutual replacement of the components and expressions of the present invention between methods, devices, programs, temporary or non-temporary storage media recording programs, systems, etc. It is effective as an aspect of the present invention.

ADVANTAGE OF THE INVENTION According to this invention, the platform door maintenance support system which can diagnose the state of a platform door accurately can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows roughly the structure of the platform door maintenance assistance system which concerns on 1st Embodiment. 2 is a block diagram schematically showing the platform door maintenance support system of FIG. 1; FIG. 2 is a flow chart showing an example of the operation of the platform door maintenance support system of FIG. 1;

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on preferred embodiments with reference to the drawings. In the embodiment and modified examples, the same or similar constituent elements and members are denoted by the same reference numerals, and overlapping descriptions are omitted as appropriate. In addition, the dimensions of the members in each drawing are appropriately enlarged or reduced for easy understanding. Also, in each drawing, some of the members that are not important for explaining the embodiments are omitted.
Also, terms including ordinal numbers such as first, second, etc. are used to describe various components, but these terms are used only for the purpose of distinguishing one component from other components, and the terms The constituent elements are not limited by

[First embodiment]
A configuration of a platform door maintenance support system 1 according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a configuration diagram schematically showing the configuration of a platform door maintenance support system 1 according to the first embodiment. FIG. 2 is a block diagram schematically showing the platform door maintenance support system 1. As shown in FIG.

The platform door maintenance support system 1 is a system that provides maintenance support for platform door devices (hereafter referred to as "platform doors" in this specification) installed on platforms where passengers get on and off at railway stations and the like. Each functional block shown in FIG. 2 can be realized by electronic elements such as a CPU of a computer, mechanical parts, etc. in terms of hardware, and realized by computer programs etc. in terms of software. It depicts the functional blocks realized by cooperation. Therefore, those skilled in the art will understand that these functional blocks can be realized in various ways by combining hardware and software.

As shown in FIGS. 1 and 2 , the platform door maintenance support system 1 includes a platform door 100 , an integrated control section 40 and a management device 50 . One or more platform doors 100 are provided on the platform Pf. The platform door 100 is driven by the motor 24 to open and close the door 12 . The general control unit 40 centrally controls one or a plurality of platform doors 100 via a transmission line 40d for transmitting information. The transmission line 40d may be a LAN (Local Area Network), but the transmission line 40d in this embodiment is a data bus. The platform door 100 and the integrated control unit 40 are connected to the transmission line 40d by the bus connection means 40a.

The integrated control unit 40 controls the opening and closing of the platform doors 100 according to the operation of the operator. For example, an open/close command signal for the door 12 is transmitted to each platform door 100 according to operation information from the operation unit 40s operated by the station attendant. Further, the integrated control unit 40 acquires predetermined information such as information on opening/closing of the door and information on the presence/absence of an abnormality from the platform door 100 . For example, 40 platform doors 100 and 1 general control unit 40 are connected to a platform corresponding to a 10-car train having 4 doors per car. In this case, the integrated control unit 40 controls the opening and closing of the 40 platform doors 100 and acquires predetermined information from them. In this sense, the integrated control unit 40 is sometimes called an integrated control panel.

Each platform door 100 is assigned an ID code for identification. In the example of FIGS. 1 and 2, each platform door 100 is assigned an ID code consisting of alphabets such as A, B, and C. In FIG. When transmitting information, the integrated control unit 40 simultaneously transmits the ID code of the target platform door 100 . Each platform door 100 receives the transmitted information only if the transmitted ID code is its own. Each platform door 100 simultaneously transmits its own ID code when transmitting information. The integrated control unit 40 integrally receives and processes the transmission information transmitted from the platform door 100 together with the ID code. In the following description, it is assumed that various types of information are transmitted/received integrally with the ID code and processed integrally, unless otherwise specified.

In addition, in order to distinguish each platform door 100 and its components, a hyphen and an ID code may be added to the end of the code such as "-B", "-C", and "-D". .

In addition, the general control unit 40 acquires an electric value related to the motor 24 from the platform door 100 as an acquired value Li, and performs a process of determining whether maintenance of the platform door 100 is necessary based on the acquired value Li. The general control section 40 will be described later in detail.

The management device 50 includes a monitoring computer, and monitors in real time information regarding the open/close status of each platform door 100 and the presence or absence of an abnormality. The management device 50 of this embodiment is provided in a management center 50c. The management device 50 communicates with the general control unit 40 via the network NW, and acquires information (hereinafter referred to as “maintenance information”) regarding the necessity of maintenance of the platform door 100 from the general control unit 40 . For example, the management device 50 can store maintenance information and display the maintenance information on a display device. The management device 50 can output maintenance information to external devices such as printers and other information terminals. This external device may be a desktop type or a portable type.

(platform door)
The platform door 100 will be explained. As shown in FIG. 1, the platform door 100 includes a door engine 10, a door 12, a belt 14, a driving pulley 16, a driven pulley 18, a running rail 20, a suspension 22, a controller 30, and a display. 48 and . The door engine 10, the belt 14, the driving pulley 16, the driven pulley 18, the running rail 20, and the suspension portion 22 are components constituting the drive mechanism of the platform door 100, and are provided in the header box 60, for example. The platform door 100 opens and closes a predetermined frontage by moving the door 12 in the horizontal direction (hereinafter referred to as "movable direction") in FIG.

The door engine 10 has a motor 24 and a gear mechanism (not shown) that rotates the drive pulley 16 based on the rotation of the motor 24 . The door engine 10 functions as a power source that opens and closes the door 12 with the driving force of the motor 24 . The motor 24 is driven by an IPM (intelligent power module) provided in an engine driving section 28, which will be described later. Motor 24 may be a motor based on various known principles. The motor 24 of this embodiment is a brushless motor having an encoder 24e using a Hall IC.

The driven pulley 18 is provided apart from the drive pulley 16 in the movable direction. The belt 14 is looped around the drive pulley 16 and the driven pulley 18 . The belt 14 rotates the driven pulley 18 as the drive pulley 16 rotates. Belt 14 may be a toothed timing belt.

The running rail 20 is a rail member for guiding the door 12 above the door 12 and extends in the moving direction of the door 12 . The suspension part 22 is a mechanism for suspending the door 12 on the travel rail 20 and is provided above the door 12 . The suspension part 22 has a door roller 22c that rolls on the travel rail 20, and is supported by the travel rail 20 via the door roller 22c. The door 12 is connected to the belt 14 via a connecting member 12j.

The controller 30 controls the opening/closing operation of the door 12 based on the opening/closing command signal from the general control unit 40 and functions as an individual control panel that provides the general control unit 40 with maintenance information for the platform door 100 . The controller 30 includes an engine drive section 28, a control section 26, an acquisition section 34, an information communication section 30c, and an information storage section 30m. The engine drive section 28 functions as a drive circuit that drives the motor 24 of the door engine 10 . The control unit 26 controls opening and closing operations of the door 12 via the engine drive unit 28 . The obtaining unit 34 obtains the obtained numerical value Li of the motor 24 . The information communication section 30c communicates with the general control section 40 via the transmission path 40d, receives the opening/closing command signal from the general control section 40, and transmits predetermined information to the general control section 40. FIG. The information storage unit 30m stores predetermined information.

The presentation unit 48 presents the determination result of the determination unit 42 of the integrated control unit 40, which will be described later. The presentation unit 48 of this embodiment is arranged near the door 12 and has an LED 48b. The presentation unit 48 presents the determination result according to the lighting state of the LED 48b. In this example, the LED 48b is lit in green when maintenance is not required, and the LED 48b is lit in red when maintenance is required within a certain period of time. In this case, the station staff can easily grasp the need for maintenance of the platform doors 100 .

In the platform door 100 configured as described above, when the motor 24 rotates the driving pulley 16, the driving pulley 16 and the driven pulley 18 rotate, and the belt 14 moves in a loop. When the belt 14 moves, the suspending portion 22 suspended from the belt 14 via the connecting member 12j moves on the running rail 20 in the movable direction. The door 12 moves in the movable direction together with the suspension portion 22 to perform opening and closing operations. The platform door 100 opens the door 12 based on the door open command signal from the integrated control unit 40 and closes the door 12 based on the door close command signal.

With the above configuration, the speed of the door 12 (hereinafter referred to as "door speed") is proportional to the rotational speed of the motor 24. As shown in FIG. Therefore, the control unit 26 can obtain the door speed from the frequency or period of the output pulse of the encoder 24e. The control unit 26 can acquire the position of the door 12 (hereinafter referred to as "door position") by counting the output pulses of the encoder 24e. The control unit 26 controls the movement of the door 12 according to the door speed and door position as follows.

An opening operation of the door 12 will be described. The opening operation is an operation to move the door 12 stopped at the closed position to the open position and stop it. The opening operation includes an acceleration operation for accelerating the door 12 to a predetermined speed, a speed control operation for maintaining the door 12 at the predetermined speed, a deceleration operation for decelerating the door 12, and a low speed approaching the door 12 to the stop position. It includes an approach motion and a stop motion that stops the door 12 . In the acceleration operation, when the door 12 is accelerated and reaches a predetermined speed, it is switched to the speed control operation. The speed control operation is switched to deceleration operation when the door 12 reaches a predetermined position. The deceleration operation is switched to the approach operation when the door 12 reaches the speed for approach. The approaching operation moves the door 12 to the open position, and the stopping operation stops the door 12. - 特許庁

In each operation described above, the voltage supplied to the motor 24 (hereinafter referred to as "motor voltage") is controlled so that the door position and the door speed have a predetermined relationship. The motor voltage is pulse width modulated (PWM modulated) and controlled by its duty ratio. The drive current (hereinafter referred to as "motor current") flowing through the motor 24 increases as the load on the motor 24 increases. Therefore, when the load on the drive mechanism of the platform door 100 increases due to wear of components, etc., the duty ratio of the motor voltage increases, and the motor current also increases. Thus, the electrical values of the motor 24, such as the magnitude of the motor current and the duty ratio of the motor voltage, change according to the load on the drive mechanism. In other words, by monitoring changes in the electrical values of the motor 24, it is possible to ascertain changes in the load on the drive mechanism due to component wear and the like.

The obtained numerical value Li is not particularly limited as long as it can grasp the fluctuation of the load of the drive mechanism, but the obtaining unit 34 of the present embodiment obtains the value of the motor current as the obtained numerical value Li. In this example, the obtaining unit 34 obtains the value of the motor current as the obtained numerical value Li based on the voltage drop of the shunt resistor (not shown) connected in series with the motor 24 .

(close operation)
The closing operation is an operation of moving the door 12 from the open position to the closed position and then stopping, and is different from the opening operation in that the direction of movement of the door 12 is opposite, but other operations are the same as the opening operation. Therefore, redundant description is omitted.

The information storage unit 30m stores integrated information in which the obtained numerical value Li and the door speed are associated with the door position. This integrated information includes the acquisition date and time of the acquisition numerical value Li. The information storage unit 30m chronologically stores integrated information including acquisition dates and times.

The information communication section 30c transmits the integrated information stored in the information storage section 30m to the integrated control section 40. FIG. The information storage unit 30m may erase the stored information after transmitting the integration information to the integrated control unit 40. FIG. The information communication unit 30c transmits status information such as information regarding the opening and closing of the door and information regarding the presence or absence of an abnormality from the platform door 100 to the general control unit 40 .
The above is the description of the configuration of the platform door 100 .

Next, the integrated control section 40 will be described. The integrated control unit 40 includes an operation acquisition unit 40b, a first communication unit 40c, a second communication unit 40e, a determination unit 42, a storage unit 40m, and an output unit 44. The operation acquisition unit 40b acquires operation information of an operator (station attendant) from the operation unit 40s. The first communication unit 40 c communicates with the platform door 100 . The second communication unit 40 e communicates with the management device 50 . The determination unit 42 determines whether maintenance of the platform door 100 is necessary. The storage unit 40m stores predetermined information. The output unit 44 outputs the determination result of the determination unit 42 to the outside. The output unit 44 of this embodiment outputs the determination result of the determination unit 42 to the presentation unit 48 .

The first communication unit 40c communicates with the information communication unit 30c via the transmission line 40d, and transmits to the platform door 100 an opening/closing command signal for the door 12 based on the operation information. Also, the first communication unit 40c receives status information such as information on opening/closing of the door 12 and information on the presence or absence of an abnormality from the platform door 100 . Further, the first communication unit 40c receives from the platform door 100 integrated information in which the obtained numerical value Li and the door speed are associated with the door position.

(Judgment part)
The determination unit 42 determines whether maintenance of the platform door 100 is necessary based on the received acquired numerical value Li. For example, the determination unit 42 may determine that maintenance is required when a preset value is exceeded. However, in this case, there is a possibility of erroneous determination when the load of the drive mechanism is temporarily increased due to the wind pressure applied to the door 12, the viscosity of grease in various places, or the temperature characteristics of the sliding gap. Therefore, the determination unit 42 of the present embodiment reduces erroneous determination by relative comparison with another platform door. In particular, the determination unit 42 may determine whether or not maintenance is necessary by referring to the value of current flowing through another motor when another platform door is opened and closed by another motor.

Specifically, the determination unit 42 of the present embodiment performs two determinations on the obtained numerical value Li. First, the determination unit 42 determines whether or not the obtained numerical value Li exceeds a preset threshold value Lt. If the obtained numerical value Li is equal to or less than the threshold value Lt, the determination unit 42 determines that immediate maintenance is unnecessary. When the obtained numerical value Li exceeds the threshold Lt, the determination unit 42 makes a determination by relative comparison with another platform door. In this case, the acquired numerical value of the platform door to be compared is used as the reference value. The threshold Lt will be detailed later.

Although the platform doors to be compared are not limited, in this embodiment, one or a plurality of platform doors that open and close at the same time as the platform doors 100 are to be compared. When a plurality of platform doors are to be compared, the average value, maximum value, minimum value, etc. of the acquired numerical values of the plurality of platform doors may be used as reference values. Further, the comparison target may be a platform door arranged away from the platform door 100 or a platform door arranged near the platform door 100 . In the following description, an example is shown in which the platform door 100 is used as the determination target, and the platform door 100-B adjacent to the determination target is used as the comparison target. The platform door 100-B is of the same type as the platform door 100 and opens and closes at the same time. In this case, since the area and weight of the door 12 are the same, conditions such as wind pressure and grease viscosity are almost the same, and they are less likely to be affected.

In this embodiment, the determining unit 42 determines whether or not maintenance is necessary using the obtained numerical value Li-B of the platform door 100-B as a reference value. The acquired numerical value Li-B is the current value flowing through the motor 24-B acquired when the platform door 100-B is opened and closed by the motor 24-B.

A method of comparing the obtained numerical value Li to be determined with the obtained numerical value Li-B (reference value) will be described. Various methods can be adopted as the comparison method. The determination may be made according to the magnitude of the difference between the acquired numerical value Li and the acquired numerical value Li−B, or the determination may be made according to the magnitude of the ratio between the acquired numerical value Li and the acquired numerical value Li−B. However, the platform doors to be judged and compared may have variations in manufacturing or in setting, and such variations may cause erroneous determination. Therefore, in the present embodiment, the obtained numerical value Li and the obtained numerical value Li−B are normalized and used for determination. As a method of normalization, various methods can be adopted, but in the present embodiment, the obtained numerical value Li and the obtained numerical value Li-B are respectively obtained in the past as a reference value, and the ratio to this reference value normalize by converting to

The acquisition date and time of the reference numerical value is not particularly limited as long as it is a date and time that can be used as a basis for ratio conversion. In this case, it is possible to suppress the influence of fluctuations in the motor current due to season and time. In the present embodiment, the ratios calculated by dividing the acquired numerical values Li and Li−B by the acquired numerical values Li and Li−B respectively acquired at the same time on the previous day (hereinafter referred to as “calculated ratios Ri and Ri−B”). shall be the basis for judgment.

The determination process may be executed at any time, but in this embodiment, it is executed at the start of work every day or before or after that. In this case, the processing load on the determination unit 42 is reduced compared to the case where the processing is executed as needed, processing can be performed even by a processing device with low processing capability, and cost reduction and miniaturization can be easily realized.

The acquisition timing of the acquisition numerical value Li used for determination is not particularly limited as long as it is a timing that can be used as a determination target. The obtained numerical value Li may be obtained in any one of the acceleration operation state, the speed control operation state, the deceleration operation state, and the approach operation state. In this case, compared to the case where the acquired numerical values Li are acquired in different operating states, it is possible to suppress the influence of load variations due to different operating states. In this embodiment, the obtained numerical value Li used for determination is obtained in the speed control operation state. In this case, since the moving speed of the door 12 is substantially constant, the load fluctuation of the drive mechanism can be grasped with high accuracy. The acquisition timing of the acquired numerical value Li−B used for determination may be the same as the acquisition timing of the acquired numerical value Li used for determination.

The acquired numerical value Li used for determination may be the acquired numerical value for one opening/closing, but in the present embodiment, the acquired numerical value Li used for determination is each acquired numerical value for multiple opening/closing (for example, 100 opening/closing, 200 opening/closing). is the statistical result (for example, average value) of In this case, the influence of errors due to short-term factors such as gusts can be suppressed. The same applies to the obtained numerical value Li-B used for determination.

The position of the door 12 at which the acquisition value Li used for determination is acquired (hereinafter referred to as the “acquisition position”) may not be a fixed position, but in the present embodiment, a predetermined door position is used as the acquisition position. and The capture position may be set anywhere from the closed position to the open position. In this embodiment, when the stroke of the door 12 from the closed position to the open position is 100%, the closed position is 0%, and the open position is 100%, the acquired position is 30% to 30% of the stroke from the closed position to the open position. It is set within the range of 70%. In this case, it is possible to suppress the influence of load variations depending on the acquisition position. The acquisition position of the acquisition numerical value Li−B may be the same as the acquisition position of the acquisition numerical value Li.

A method for comparing the calculated ratio Ri with the calculated ratio Ri-B will be described. Various methods can be adopted as the comparison method. The determination may be made according to the magnitude of the difference between the calculated ratio Ri and the calculated ratio Ri−B, or the magnitude of the ratio between the calculated ratio Ri and the calculated ratio Ri−B. In this embodiment, when the calculated ratio Ri is equal to the calculated ratio Ri−B, it is determined that immediate maintenance is not required, and if not, it is determined that maintenance is required within a predetermined period. For example, if the ratio of the calculated ratio Ri (numerator) to the calculated ratio Ri−B (denominator) is in the range of 80% to 120%, they can be treated as equal.

The threshold Lt will be explained. The threshold Lt is set by adding an allowable width to the reference value. For example, the threshold Lt may be set to a value calculated on design, or may be set using a statistical result such as an average value of numerical values obtained from a plurality of platform doors as a reference value. In the present embodiment, the numerical value obtained for the platform door 100 itself obtained in the past is set as the reference value. In particular, the threshold value Lt is set using the acquired numerical value of the platform door 100 itself as a reference value when the platform door 100 is installed or maintained. In particular, the threshold value Lt is set using the average value of a plurality of acquired numerical values acquired after a predetermined number of openings and closings (for example, 100 openings and closings, 200 openings and closings) from installation and maintenance as a reference value. In this case, since the own acquired numerical value is used, it is possible to suppress the influence of variations in manufacturing and variations in setting.

Once the threshold Lt is set, it may be constant until the next maintenance. However, the load on the drive mechanism has temperature characteristics and may increase when the temperature is cold and decrease when the temperature is high. Therefore, the threshold Lt may be updated every predetermined season. The set or updated threshold Lt is stored in the storage unit 40m.

The determination unit 42 generates maintenance information based on the determination result. In this embodiment, when it is determined that maintenance is required within a predetermined period, maintenance information indicating that fact is generated.

The second communication unit 40 e communicates with the management device 50 via the network NW, and transmits to the management device 50 information about the opening/closing status of the platform doors 100 and the presence or absence of an abnormality. The second communication unit 40e of the present embodiment transmits the determination result of the determination unit 42 of the platform door 100 or maintenance information to the management device 50 in real time.

The storage unit 40m stores the obtained numerical value Li, the threshold value Lt, the determination result of the determination unit 42, and the maintenance information in association with the ID of the platform door 100. FIG. The storage unit 40m stores this information in chronological order together with the date and time of acquisition.

(motion)
Next, the operation of the platform door maintenance support system 1 configured in this way will be described. FIG. 3 is a flow chart showing an example of the operation of the platform door maintenance support system 1. As shown in FIG. This flowchart shows determination processing S80 for determining whether or not maintenance of the platform doors 100 is necessary in the platform door maintenance support system 1 . This process may be automatically started by a timer or the like, or may be started based on the operation of an operator such as a station attendant. In this example, determination processing S80 is performed before starting work every day.

When the determination process S80 is started, the integrated control unit 40 transmits an acquisition command signal to all the platform doors under its control to acquire the acquired numerical values (step S81). At this step, the integrated control unit 40 transmits an acquisition command signal to the controller 30 of the platform door 100 .

Upon receiving the acquisition command signal, the controller 30 acquires the acquisition numerical value Li and stores the acquisition result in the information storage unit 30m (step S82). At this step, the information storage unit 30m stores the integrated information obtained by integrating the acquisition date and time with the acquisition numerical value Li.

After storing the obtained result, the controller 30 transmits the obtained numerical value Li stored in the information storage section 30m to the general control section 40 (step S83). At this step, the controller 30 transmits the integrated information and the ID code to the integrated control section 40 .

After receiving the obtained numerical value Li, the integrated control unit 40 stores the obtained numerical value Li in the storage unit 40m (step S84). In this step, the storage unit 40m classifies and stores the received integrated information for each ID code of the transmission source.

After storing the obtained numerical value Li, the integrated control unit 40 determines whether or not the obtained numerical value Li exceeds a preset threshold value Lt (step S85). If the obtained numerical value Li does not exceed the preset threshold value Lt (N in step S85), the integrated control unit 40 terminates the process.

If the obtained numerical value Li exceeds the preset threshold value Lt (Y in step S85), the integrated control unit 40 refers to the obtained numerical value Li-B of the platform door 100-B to determine whether maintenance is necessary. (Step S86). In this step, the determination unit 42 divides the acquired numerical values Li and Li−B by the acquired numerical values Li and Li−B acquired at the same time on the previous day, respectively, and normalizes the calculated ratios Ri and Ri−B for determination. do. The determination unit 42 may determine that immediate maintenance is not required when the calculated ratio Ri is equal to the calculated ratio Ri−B, and may determine that maintenance is required within a predetermined period if they are not equal.

If it is determined that maintenance is unnecessary (N in step S86), the integrated control unit 40 terminates the process S80.

When it is determined that maintenance is required within the predetermined period (Y in step S86), the integrated control unit 40 generates maintenance information based on the determination result and transmits it to the management device 50 (step S87). At this step, the integrated control unit 40 outputs the determination result to the presentation unit 48, and the presentation unit 48 presents the determination result by the LED 48b.

After transmitting the maintenance information, the integrated control unit 40 terminates the process S80. This processing S80 is merely an example, and other steps may be added, some steps may be changed or deleted, and the order of the steps may be changed.

In the above description, an example is shown in which the determination of necessity of maintenance is performed with the platform door 100 as the determination target. They may be executed sequentially.

Next, features of this embodiment will be described. This embodiment is a platform door maintenance support system. This platform door maintenance support system 1 includes an acquisition unit 34 that acquires an electrical value related to the motor 24 as an acquired value Li when the platform door 100 is opened and closed by the motor 24, and maintenance based on the acquired value Li. and a determination unit 42 that determines whether or not the

According to this form, the magnitude of the load on the motor 24 can be grasped from the electrical values such as the current value and voltage value of the motor 24 . Further, the presence or absence of an abnormality in the drive mechanism of the platform door 100 can be accurately determined based on the magnitude of this load. Accordingly, it is possible to assist in determining whether maintenance of the platform door 100 is necessary.

The acquisition unit 34 may acquire the value of current flowing through the motor 24 as the acquisition value Li, and the determination unit 42 determines whether another platform door 100-B is opened or closed by another motor 24-B. The necessity of maintenance may be determined by referring to the current value flowing through the motor 24 . In this case, since the motor current changes proportionally to changes in the load of the drive mechanism, by monitoring the motor current, fluctuations in the load of the drive mechanism due to wear of components can be grasped. In addition, since the characteristics of another platform door are referred to, the load on the drive mechanism increases due to common factors such as the wind pressure received by the door 12, the viscosity of the grease, and the temperature characteristics of the sliding gap, compared to the case where the determination is made with a single platform door. erroneous judgment can be reduced by canceling the influence of

The determination unit 42 may determine whether or not maintenance is necessary by referring to the value of current flowing through another motor 24-B when the acquired numerical value Li exceeds the threshold value Lt. In this case, the processing load on the determination unit 42 is reduced compared to the case where the maintenance necessity determination is performed even when the obtained numerical value Li is equal to or less than the threshold value Lt, and processing can be performed even with a processing device with low processing capability, resulting in cost reduction and miniaturization. can be easily realized.

The obtaining unit 34 may obtain the current value flowing through the motor 24 in a predetermined operating state as the obtained numerical value Li. In this case, compared with the case where the obtained numerical values Li are obtained in different operating states, it is possible to suppress deterioration in determination accuracy due to load variations due to different operating states.

The obtaining unit 34 may obtain, as the obtained numerical value Li, the current value flowing through the motor 24 when the door 12 of the platform door 100 moves to a predetermined position. In this case, since the obtained numerical value Li can be obtained at a fixed door position, it is possible to suppress deterioration in determination accuracy due to variations in the load at the obtained position, compared to the case where the obtained numerical value Li is obtained at random door positions.

The determination unit 42 may refer to a numerical value set according to an electrical numerical value relating to the motor 24 acquired in the past to determine whether maintenance is necessary. In this case, the determination criteria can be set using past actual measurements of the motor 24 to be determined. It is possible to suppress the deterioration of the judgment accuracy due to the variation of

A presentation unit 48 that presents the determination result of the determination unit 42 may be further provided. In this case, since the determination result is presented, the station attendant or the serviceman can easily grasp the state regarding the necessity of maintenance of the platform door 100 . By providing the presentation unit 48 in the management center, the manager of the management center can easily grasp the state of the platform door 100 and create a necessary maintenance plan at an appropriate time.

[Second embodiment]
A second embodiment of the present invention is a platform door. As shown in FIGS. 1 and 2, the platform door 100 of the second embodiment includes an acquisition unit 34 that acquires electrical numerical values related to the motor 24 when the platform door 100 is opened and closed by the motor 24, and an acquisition unit and an information communication unit 30c for transmitting the acquisition result of 34.

According to this embodiment, the magnitude of the load on the motor 24 can be grasped from the electrical values such as the current value and the voltage value of the motor 24, and the presence or absence of an abnormality in the drive mechanism of the platform door 100 can be accurately determined based on the magnitude of the load. I can grasp it.

[Third embodiment]
A third embodiment of the present invention is a maintenance support method for platform doors 100 . This method is a method for supporting the maintenance of platform doors 100 that are opened and closed by motors 24, and includes the steps of obtaining electrical values relating to motors 24 when platform doors 100 are opened and closed, and the obtained electrical values. and a step of determining whether maintenance is necessary based on.

According to this embodiment, the magnitude of the load on the motor 24 can be grasped from the electrical values such as the current value and voltage value of the motor 24 . Further, the presence or absence of an abnormality in the drive mechanism of the platform door 100 can be accurately determined based on the magnitude of this load. Accordingly, it is possible to assist in determining whether maintenance of the platform door 100 is necessary.

Exemplary embodiments of the present invention have been described above in detail. All of the above-described embodiments merely show specific examples for carrying out the present invention. The contents of the embodiments do not limit the technical scope of the present invention, and many design changes such as changes, additions, and deletions of constituent elements can be made without departing from the spirit of the invention defined in the claims. It is possible. In the above-described embodiment, descriptions such as "of the embodiment", "in the embodiment", etc. are added to the contents that allow such design changes. Changes are not unacceptable.

[Modification]
Modifications will be described below. In the drawings and description of the modified example, the same reference numerals are given to the same or equivalent components and members as the embodiment. Descriptions that overlap with the embodiment will be omitted as appropriate, and the configuration that is different from the first embodiment will be mainly described.

[First modification]
In the description of the first embodiment, an example in which the acquired numerical value Li is acquired during the operation of controlling the door speed to a predetermined state was shown, but the present invention is not limited to this. For example, the acquired numerical value Li may be obtained by applying a preset voltage to the motor 24 and acquiring the motor current flowing through the motor 24 at that time. In this case, the motor current may be acquired over the entire range from the closed position to the open position, and the average value thereof may be used as the acquired numerical value Li, or the value of the motor current at a specific door position may be used as the acquired numerical value Li.

[Second modification]
In the description of the first modified example, an example of acquiring the motor current over the entire range from the closed position to the open position was shown, but the present invention is not limited to this. For example, a predetermined voltage is applied to the motor 24, and the motor is in a state from a certain period of time (for example, 1 second) after the start of movement of the door 12 to a certain period of time (for example, 1 second) before the end of movement of the door 12. The current may be obtained and the average value thereof may be used as the obtained numerical value Li. In this case, since the rush current immediately after the voltage is applied to the motor 24 can be removed, the influence of the rush current can be suppressed and the stable obtained numerical value Li can be obtained.

[Third Modification]
In the description of the first embodiment, an example was given in which the position (acquisition position) of the door 12 with respect to the threshold Lt is not limited, but the present invention is not limited to this. The threshold value Lt may be set according to the acquired numerical value of the platform door 100 acquired at a preset acquisition position. In this case, the maintenance necessity determination is executed based on the threshold value Lt and the acquired numerical value Li acquired at the preset acquisition position. By keeping the acquisition position constant, it is possible to suppress the influence of load fluctuations due to the acquisition position of the drive mechanism.

[Fourth Modification]
In the description of the first embodiment, an example was given in which the platform door 100-B adjacent to the platform door 100 to be determined is used as a comparison target, but the present invention is not limited to this. For example, among the platform doors, a platform door with an obtained numerical value close to the obtained numerical value of the platform door 100 to be judged may be used as a comparison target. For example, among the platform doors, a platform door having a threshold value close to the threshold value of the platform door 100 to be judged may be compared. For example, the platform doors may be grouped according to thresholds close to each other, and comparison targets may be selected from among those groups.

[Fifth Modification]
In the description of the first embodiment, an example was shown in which the door support structure of the platform door to be compared was not limited, but the present invention is not limited to this. For example, a platform door having the same door support structure as that of the platform door 100 to be determined may be used as a comparison target. For example, among the platform doors having the same door support structure as the platform door 100 to be determined, the platform door provided closest to the platform door 100 to be determined may be used as a comparison target. In this case, the influence of the difference in motor current characteristics due to the difference in the door support structure can be suppressed.

(Other modifications)
In the description of the first embodiment, an example in which the output unit 44 outputs the determination result of the determination unit 42 to the presentation unit 48 was shown, but the present invention is not limited to this. For example, the output unit 44 may transmit the determination result to a desktop or portable information terminal, or may transmit the determination result to the outside as an e-mail. By displaying the determination result on the serviceman's information terminal, the need for maintenance of the platform door 100 can be easily grasped.

In the description of the first embodiment, an example in which the platform door of the same type that opens and closes at the same time as the platform door 100 to be judged is used as a comparison object was shown, but the present invention is not limited to this. The object of comparison may be a platform door of a type different from that of the platform door 100 to be judged, or a platform door that opens and closes at a timing different from that of the object to be judged.

In the description of the first embodiment, an example was shown in which the platform doors provided on the same platform as the platform doors 100 to be judged are compared, but the present invention is not limited to this. The object of comparison may be a platform door provided on a platform different from the platform door 100 to be determined.

In the description of the first embodiment, an example in which the determination unit 42 provides determination results in which the acquired numerical values Li are classified into two categories using one threshold value Lt has been described, but the present invention is not limited to this. The determination unit may provide determination results in which the obtained numerical values Li are classified into three or more categories using a plurality of thresholds.

In the description of the first embodiment, the motor current is detected using a shunt resistor, but the present invention is not limited to this. For example, motor current may be sensed using the duty ratio of the motor voltage.

In the description of the first embodiment, the belt 14 is used to drive the door 12, but the present invention is not limited to this. The door 12 may be driven by known drive means such as chain and sprocket, wire and pulley, rack and pinion, ball and screw nut.

The modified example described above has the same functions and effects as those of the first embodiment.

Any combination of the above-described embodiments and modifications is also useful as embodiments of the present invention. A new embodiment resulting from the combination has the effects of each of the combined embodiments and modifications.

1 Platform door maintenance support system 10 Door engine 12 Door 24 Motor 30 Controller 30c Information communication unit 34 Acquisition unit 40 Integrated control unit 42... Judgment part, 44... Output part, 48... Presentation part, 50... Management apparatus, 100... Platform door.

Claims (5)

an acquisition unit that acquires an electrical numerical value related to the motor as an acquired numerical value when the platform door is opened and closed by the motor;
a determination unit that determines whether or not maintenance is necessary based on the acquired numerical value;
with
The acquisition unit acquires a current value flowing through the motor as the acquired numerical value,
When the obtained numerical value exceeds a threshold value, the determination unit determines whether or not maintenance is necessary by referring to a current value flowing through another motor when another platform door is opened and closed by another motor. maintenance support system for platform doors. 2. The platform door maintenance support system according to claim 1 , wherein the obtaining unit obtains a current value flowing through the motor in a predetermined operating state as the obtained numerical value. 3. The platform door maintenance support system according to claim 2 , wherein the acquiring unit acquires, as the acquired numerical value, a current value flowing through the motor when the door of the platform door moves to a predetermined position. The platform door maintenance support system according to any one of claims 1 to 3 , further comprising a presentation unit that presents the determination result of the determination unit. A method for supporting maintenance of a platform door that is opened and closed by a motor, comprising:
a step of obtaining , as an obtained numerical value, a current value flowing through the motor when opening and closing the platform door;
When the obtained numerical value exceeds a threshold value, the need for maintenance of the platform door is determined by referring to the current value flowing through the other motor when another platform door is opened and closed by another motor. and a step of determining.

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