JP7319756B2 - COVER STATE DETECTION DEVICE AND COVER STATE MANAGEMENT SYSTEM - Google Patents

Description

TECHNICAL FIELD The present invention mainly relates to a cover state detection device for detecting a mounting state of an underfloor equipment cover of a railway vehicle.

Patent Literature 1 discloses the following management method relating to manufacturing work of railroad vehicles. That is, a first IC tag is attached to a fastening member such as a bolt used in manufacturing work of a railway vehicle. A second IC tag is attached to a part such as a cover that is attached during manufacturing work of a railway vehicle. Correct combinations of parts and fastening members are registered in advance in the work management server based on design drawings and the like. The work management server reads the information of the first IC tag and the second IC tag and compares it with the correct combination to determine whether the manufacturing work is appropriate.

WO2017/149623

However, although Patent Document 1 discloses a method for detecting whether or not the combination of railway vehicle parts and fastening members is appropriate, it does not disclose how to detect whether or not the mounting state of the parts is appropriate. do not have. In particular, since the underfloor equipment cover of a railway vehicle needs to be removed each time the underfloor equipment is inspected, it is necessary to check whether the underfloor equipment cover is properly attached after the inspection. When an operator performs this confirmation work, a large number of man-hours are required.

In particular, railcars have a limited space for arranging equipment, and tend to easily deteriorate power supply units and feeder lines due to vibrations. Therefore, particularly in railway vehicles, there is a demand for a configuration that detects the mounting state of the underfloor equipment cover without using a power supply unit, a power supply line, or the like.

The present invention has been made in view of the above circumstances, and its main object is to detect the cover state of the underfloor equipment cover in a simple process without providing a power supply for detecting the underfloor equipment cover. An object of the present invention is to provide a detection device.

The problems to be solved by the present invention are as described above. Next, the means for solving the problems and the effects thereof will be described.

According to the aspect of the present invention, a cover state detection device having the following configuration is provided. That is, the cover state detection device detects whether or not the underfloor equipment cover that covers the underfloor equipment of the railway vehicle is normally attached. The cover state detection device includes a switch and an RF tag. The switch is in a normal state in which the underfloor equipment cover is attached at a normal position on the vehicle body of the railway vehicle, or in a detached state in which the underfloor equipment cover is attached at a position deviated from the normal position. The contact state is switched depending on whether or not. The RF tag is a passive type that converts electromagnetic waves from the outside into power and transmits response waves, is electrically connected to the switch, and includes state information according to the contact state of the switch. Send a response wave.

Accordingly, the contact state of the switch can be detected by reading the RF tag. Since the contact state of the switch corresponds to the mounting state of the underfloor device cover, the mounting state of the underfloor device cover can be detected based on the contact state of the switcher. As described above, the mounting state of the underfloor equipment cover can be detected by a simple process without using a power supply.

ADVANTAGE OF THE INVENTION According to this invention, the cover state detection apparatus which can detect the attachment state of an underfloor apparatus cover by a simple process can be implement|achieved, without providing the power supply for the detection of an underfloor apparatus cover.

1 is a side view of a railroad vehicle provided with a cover state detection device according to an embodiment of the present invention; FIG. FIG. 4 is a schematic front view of the underfloor device cover and the mounting portion when the underfloor device cover is mounted in a normal position (normal state); FIG. 4 is a schematic front view of the underfloor device cover and the mounting portion when the underfloor device cover is mounted at a position deviated from the normal position (detached state); The figure which shows the circuit structure of a cover state detection apparatus. Schematic diagram of a cover state management system.

Embodiments of the present invention will now be described with reference to the drawings. First, a railcar 1 provided with the cover state detection device 10 of the present embodiment will be briefly described.

As shown in FIG. 1 , the railcar 1 includes a vehicle body 2 and a bogie 3 . The vehicle body 2 has a substantially box-like configuration, and is provided with a passenger cabin, a driver's cab, or the like. The bogie 3 supports the vehicle body 2 . The bogie 3 is provided with a motor that generates power for running the railroad vehicle 1 . Power generated by the motor is transmitted to the wheels 4 .

A plurality of underfloor equipment covers 5 are attached to the vehicle body 2. - 特許庁The underfloor is below the floor surface of the passenger compartment of the vehicle body 2, the driver's cab, or the like. Under the floor, in addition to the motor described above, underfloor equipment such as a transformer, a gear device, and a control device are arranged. The underfloor equipment cover 5 is a cover that covers the side portion (outer side in the vehicle width direction) of the underfloor equipment. A plurality of underfloor equipment covers 5 are arranged side by side in the vehicle length direction in the railway vehicle 1 . In addition, the underfloor equipment covers 5 are arranged on the left side and the right side of the underfloor.

Next, referring to FIG. 2, the mounting configuration of the underfloor equipment cover 5 will be described. The underfloor equipment cover 5 is detachably attached to the vehicle body 2. - 特許庁When inspecting the underfloor equipment, the underfloor equipment cover 5 is removed. After the inspection of the underfloor equipment, the underfloor equipment cover 5 is attached to the vehicle body 2 again. Further, the underfloor equipment cover 5 is made of metal.

As shown in FIG. 2, the vehicle body 2 includes a mounting portion 2a for mounting the underfloor equipment cover 5 thereon. The mounting portion 2a is made of metal. A recessed portion 2b having a shape recessed inward in the vehicle width direction is formed in the lower portion of the mounting portion 2a. A space is formed in the vehicle body 2 by forming the recess 2b. A protruding portion 2c having a shape protruding upward is formed at the lower portion of the mounting portion 2a. The projecting portion 2c is located inside the space formed by the recessed portion 2b (the space covered by the wall surface of the recessed portion 2b, etc.).

The underfloor equipment cover 5 is formed with a groove portion 5a having a shape corresponding to the projecting portion 2c (a shape into which the projecting portion 2c can be inserted). Through holes for inserting bolts 31 are formed in the vehicle body 2 and the underfloor equipment cover 5, respectively. By locating the projecting portion 2c in the groove portion 5a, the positions of these through holes are aligned. The underfloor equipment cover 5 can be attached to the attachment portion 2 a of the vehicle body 2 by inserting the bolt 31 into the through hole and tightening it with the nut 32 .

Below, attaching the underfloor equipment cover 5 so that the protruding portion 2c is positioned within the groove portion 5a is referred to as attaching the underfloor equipment cover 5 to the "normal position". A state in which the underfloor device cover 5 is attached to the normal position is referred to as a "normal state."

Further, as shown in FIG. 3, the underfloor equipment cover 5 of the present embodiment can be used even when the protruding portion 2c is displaced from the groove portion 5a (even when the positions of the protruding portion 2c and the groove portion 5a are displaced in the vehicle width direction). ), bolts 31 and nuts 32 can be used.

In the following description, it is assumed that the underfloor equipment cover 5 is attached in a state in which the projecting portion 2c is disengaged from the groove portion 5a (a state in which the members to be engaged are not engaged). is referred to as being A state in which the underfloor device cover 5 is attached to the detached position is referred to as a "detached state". Furthermore, the state in which the underfloor device cover 5 is not attached to the attachment portion 2a is also referred to as the "disconnected state". When the underfloor equipment cover 5 is in the detached state, the underfloor equipment cover 5 is in a state of being easily detached or has already been detached. Therefore, after completing the inspection of the underfloor equipment, it is preferable to perform the next step after confirming that all the underfloor equipment covers 5 are in a "normal state".

Note that the mounting structure of the underfloor equipment cover 5 is an example, and a different structure may be used as long as the underfloor equipment cover 5 is detachably mounted. Moreover, the mounting structure of the lower part of the underfloor equipment cover 5 is arbitrary, and for example, it may be a structure in which a groove and a projection are aligned, or a structure in which bolts and nuts are used for fastening.

Here, as shown in FIG. 1, since the railcar 1 has many underfloor equipment covers 5, it is not easy for the operator to confirm that all the underfloor equipment covers 5 are in a normal state. Considering this point, the present embodiment includes a cover state detection device 10 for easily performing this work. By using the cover state detection device 10, the mounting state of all the underfloor equipment covers 5 can be detected collectively.

Next, the cover state detection device 10 will be described in detail with reference to FIGS. 2 to 4. FIG. A cover state detection device 10 is provided for each underfloor device cover 5 . Since the cover state detection device 10 is configured to detect whether the underfloor device cover 5 is in a normal state or in a detached state, it is detected at a location where the relative position of the underfloor device cover 5 with respect to the mounting portion 2a changes when the normal state is changed to the detached state. is provided. A plurality of cover state detection devices 10 may be provided for one underfloor equipment cover 5 . In addition, although the layout of each cover state detection device 10 may slightly change according to the difference in the mounting configuration of the underfloor equipment cover 5, the basic configuration of each cover state detection device 10 is the same. , one cover state detection device 10 will be described as a representative.

The cover state detection device 10 includes a permanent magnet 11 , a reed switch (switching device) 12 , a spacer 13 and an RF tag 14 .

The permanent magnet 11 is arranged on the underfloor equipment cover 5 . Therefore, the relative position of the permanent magnet 11 with respect to the mounting portion 2a changes depending on whether the underfloor equipment cover 5 is in a normal state or in a detached state. The permanent magnet 11 may be attached to the underfloor equipment cover 5 via an auxiliary member such as a yoke.

The reed switch 12 is arranged on the mounting portion 2a. The reed switch 12 may be directly attached to the attachment portion 2a, or may be attached via another member. As shown in FIG. 2, in a normal state, the permanent magnet 11 and the reed switch 12 are close to each other (they face each other in the same space). On the other hand, as shown in FIG. 3, in the disengaged state, the permanent magnet 11 and the reed switch 12 are spaced apart (they do not face each other in the same space). Also, the reed switch 12 has two contacts. The reed switch 12 electrically connects these contacts while a magnetic force greater than or equal to the threshold is acting. The reed switch 12 does not electrically connect these contacts while applying less than the threshold magnetic force. Therefore, the contact state of the reed switch 12 is switched depending on whether the underfloor equipment cover 5 is attached in a normal state or in a detached state. Since reed switch 12 is magnetically actuated, it is not necessary to supply power to reed switch 12 .

Note that the reed switch 12 may be configured to operate in the opposite direction to the magnetic force. That is, the reed switch 12 may be configured such that the contacts are electrically connected while only a magnetic force less than the threshold acts, and the electrical connection of the contacts is released when the magnetic force greater than or equal to the threshold acts. .

The spacer 13 is arranged on the mounting portion 2a. The spacer 13 is positioned outside the reed switch 12 in the vehicle width direction within the space formed by the recessed portion 2b. The spacer 13 is made of resin. Since the resin forming the spacer 13 does not have electrical conductivity, it does not adversely affect transmission and reception of electromagnetic waves even if an antenna is brought into contact with it. Although the RF tag 14 is attached to the spacer 13 in this embodiment, the reed switch 12 may also be attached to the spacer 13 .

The RF tag 14 is of a passive type, converts an external transmission wave (electromagnetic wave) into electric power, and transmits a response wave. As shown in FIG. 4, the RF tag 14 includes an IC chip 21, an antenna section 22, and a state detection circuit 23. FIG.

In this embodiment, the reed switch 12 and the RF tag 14 are integrated. Integral construction means that the reed switch 12 and the RF tag 14 can be treated as one component by connecting the reed switch 12 and the RF tag 14 together. Therefore, for example, attachment and replacement of the reed switch 12 and the RF tag 14 can be performed collectively. Specifically, the RF tag 14 is provided on a single sheet-like member, and the reed switch 12 is connected to this sheet-like member via a lead wire, a conductive pattern, or the like. Further, in addition to the reed switch 12 and the RF tag 14, the spacer 13 may be integrated. Alternatively, the reed switch 12 and RF tag 14 may be separable.

The IC chip 21 stores unique identification information. The response wave transmitted by the RF tag 14 contains this identification information. The management device 60, which will be described later, stores a database that associates the identification information of the RF tag 14 with the mounting location of the RF tag 14 (vehicle specific information and information indicating the position of the underfloor equipment cover 5). . Therefore, based on the identification information of the response wave, it is possible to specify the transmission source (attachment location) of this response wave. Also, the IC chip 21 includes a rectifying circuit, which converts a transmission wave from the outside into electric power by a rectifying action. Using this power, a process of transmitting a response wave is performed.

The antenna section 22 includes a circuit of a predetermined pattern electrically connected to the IC chip 21 . The antenna unit 22 receives transmission waves from the outside and transmits response waves to the outside. Further, since the RF tag 14 is attached to the attachment portion 2a via the spacer 13, the antenna portion 22 does not come into contact with the metal attachment portion 2a.

The state detection circuit 23 is a circuit electrically connected to the IC chip 21 and the reed switch 12 . The response wave transmitted by the RF tag 14 contains the above identification information and status information. The status information is information about the circuit status of the RF tag 14 . For example, when the state detection circuit 23 is in a disconnection state, the RF tag 14 includes "0" as state information in the response wave. Also, when the state detection circuit 23 is electrically connected, the RF tag 14 includes "1" as state information in the response wave. It is registered in the above database that "0" indicates a disconnected state and "1" indicates a conductive state. Note that "0" and "1" are simple codes for explaining the state information in an easy-to-understand manner.

For example, when the underfloor equipment cover 5 is normally attached, the magnetic force of the permanent magnet 11 electrically connects the two contacts of the reed switch 12 . As a result, the state detection circuit 23 of the RF tag 14 becomes conductive. Therefore, when the RF tag 14 receives a transmission wave from the outside in this state, the response wave contains "1" indicating the conductive state. As described above, when the state information of the response wave is "1", it can be specified that the underfloor equipment cover 5 indicated by the RF tag 14 of the transmission source is in a normal state.

On the other hand, the magnetic force of the permanent magnet 11 does not act on the reed switch 12 when the underfloor equipment cover 5 is attached to the detached position or when the underfloor equipment cover 5 is not attached to the mounting portion 2a. Therefore, the reed switch 12 does not electrically connect the two contacts. Therefore, when the RF tag 14 receives a transmission wave from the outside in this state, the response wave contains "0" indicating a disconnection state. As described above, when the status information of the response wave is "0", it can be specified that the underfloor equipment cover 5 indicated by the RF tag 14 of the transmission source is in the detached state.

In this embodiment, each part of the cover state detection device 10 is arranged in the space formed by the recess 2b. Therefore, since it is less likely to be affected by flying objects, snow, etc., the detection accuracy of the cover state detection device 10 is high, and the cover state detection device 10 is less likely to fail. In order to further enhance this effect, a protective cover may be provided to cover the space formed by the recess 2b. However, it is preferable that the protective cover is made of a non-conductive material.

Further, in this embodiment, the RF tag 14 is positioned outside the permanent magnet 11 and the reed switch 12 in the vehicle width direction. Therefore, it is possible to achieve both protection of the cover state detection device 10 and communication performance of the cover state detection device 10 .

Further, instead of the configuration of this embodiment, the permanent magnet 11 may be arranged in the mounting portion 2a, and the reed switch 12 and the RF tag 14 may be arranged in the underfloor equipment cover 5. FIG. Even with this configuration, the mounting state of the underfloor device cover 5 can be detected.

However, from the viewpoint of protection of the reed switch 12 and the RF tag 14, the configuration of this embodiment is preferable. This is because when the underfloor equipment cover 5 is removed for inspection, the underfloor equipment cover 5 may be placed on the floor or the like. This is because there is a possibility that it will come into contact with a floor surface or the like and be damaged.

Next, with reference to FIG. 5, a specific inspection method and management method for the mounting state of the underfloor equipment cover 5 will be described.

The mounting state of the underfloor equipment cover 5 is managed by a cover state management system 100 . The cover status management system 100 may manage not only the mounting status of the underfloor equipment cover 5 but also the status of other parts of the railcar 1 . The cover state management system 100 includes a cover state detection device 10 , an RF reader (transmitting/receiving device) 50 and a management device 60 .

The RF reader 50 transmits transmission waves for requesting transmission of response waves to the plurality of RF tags 14 . The RF reader 50 collectively receives the response waves transmitted by the respective RF tags 14, and stores the above identification information and status information.

RF reader 50 is, for example, a mobile terminal. The operator operates the RF reader 50 near the railway vehicle 1 to transmit transmission waves and receive response waves.

In this embodiment, since the RF tag 14 is positioned outside the area formed by the recess 2b in the vehicle width direction, a wide communication range can be realized. Also, in order to achieve a wider communication range, it is preferable to use the UHF band as the frequency band.

The RF reader 50 is not limited to mobile terminals. For example, the RF reader 50 may be one or a plurality of non-operating terminals arranged at arbitrary positions in the vicinity of the track of the railroad vehicle 1, the garage, or the inspection site. As a result, the operator's work can be omitted. Further, for example, the RF reader 50 may be attached to a moving body (for example, a vehicle running between the road surface and the railroad vehicle 1).

Information stored by the RF reader 50 based on the response wave (information in which identification information, status information, and time are associated) is transmitted to the management device 60 . The communication method between the RF reader 50 and the management device 60 is arbitrary, and may be wired or wireless, direct communication, or communication via another device, the Internet, or the like. may

Management device 60 aggregates the information stored by RF reader 50 . The management device 60 is a computer arranged in a facility for inspecting the railcars 1 . However, the management device 60 may be a server connected to this facility via the Internet or the like. The management device 60 associates and stores the identification information of the underfloor equipment cover 5 and the mounting state of the underfloor equipment cover 5, and specifies the underfloor equipment cover 5 in the detached state based on the stored information. The management device 60 may store information about the mounting state of the underfloor equipment covers 5 of the plurality of railcars 1 . By analyzing this information, it is possible to estimate the underfloor equipment cover 5 that is likely to come off, for example.

As described above, the cover state detection device 10 of the present embodiment detects whether or not the underfloor equipment cover 5 that covers the underfloor equipment of the railway vehicle 1 is normally attached. The cover state detection device 10 has a reed switch 12 and an RF tag 14 . The reed switch 12 is in a normal state in which the underfloor equipment cover 5 is attached to the normal position of the vehicle body 2 of the railroad vehicle 1, or in a detached state in which the underfloor equipment cover 5 is attached to a position deviated from the normal position. The contact state is switched depending on whether or not. The RF tag 14 is of a passive type that converts external electromagnetic waves into electric power and transmits response waves, is electrically connected to the reed switch 12, and contains state information corresponding to the contact state of the reed switch 12. Send a response wave.

Accordingly, the contact state of the reed switch 12 can be detected by reading the RF tag 14 . Since the contact state of the reed switch 12 and the mounting state of the underfloor device cover 5 correspond to each other, the mounting state of the underfloor device cover 5 can be detected based on the contact state of the reed switch 12 . As described above, the attachment state of the underfloor equipment cover 5 can be detected by a simple process without using a power source.

A cover state detection device 10 of this embodiment includes a permanent magnet 11 . The contact state of the reed switch 12 is switched depending on whether or not the permanent magnet 11 is in proximity. In a normal state, the reed switch 12 and the permanent magnet 11 are close to each other. In the disengaged state, the reed switch 12 and the permanent magnet 11 are separated. The RF tag 14 includes a state detection circuit 23 in which state information to be included in the response wave differs depending on whether or not a disconnection is included, and the reed switch 12 is electrically connected to the state detection circuit 23 .

Accordingly, by using the reed switch 12, the mounting state of the underfloor device cover 5 can be detected without using a contact-type switch that contacts the underfloor device cover 5. FIG. Therefore, the reed switch 12 and the permanent magnet 11 can be arranged more freely than when a contact switch is used.

In the cover state detection device 10 of this embodiment, the RF tag 14 and the reed switch 12 are arranged on the vehicle body 2 . A permanent magnet 11 is arranged on the underfloor equipment cover 5 .

For example, when the RF tag 14 and the reed switch 12 are placed on the underfloor device cover 5, the RF tag 14 and the reed switch 12 may be damaged when the removed underfloor device cover 5 is placed on the floor. In this regard, by arranging the RF tag 14 and the reed switch 12 on the vehicle body side, the RF tag 14 and the reed switch 12 are less likely to be damaged.

In the cover state detection device 10 of the present embodiment, the vehicle body 2 is made of metal, and the RF tag 14 is arranged on the vehicle body 2 via the spacer 13 made of resin.

Accordingly, unlike metal, resin does not significantly affect the transmission of the response wave by the RF tag 14, so communication performance can be improved.

In the cover state detection device 10 of this embodiment, the reed switch 12 and the RF tag 14 are integrated.

As a result, the number of parts is reduced, and the work such as assembly and replacement is facilitated.

In the cover state detection device 10 of this embodiment, the vehicle body 2 has a recessed portion 2b recessed inward in the vehicle width direction. A reed switch 12 and an RF tag 14 are arranged in the space formed by the recess 2b. An RF tag 14 is arranged outside the reed switch 12 in the vehicle width direction.

Accordingly, by arranging the reed switch 12 and the RF tag 14 in the recess 2b, the reed switch 12 and the RF tag 14 are less likely to be damaged. Further, by arranging the RF tag 14 on the outside in the vehicle width direction, the communication performance of the RF tag 14 can be ensured.

A cover state management system 100 of this embodiment includes a cover state detection device 10 , an RF reader 50 , and a management device 60 . The RF reader 50 transmits transmission waves to the cover state detection device 10 and receives response waves from the cover state detection device 10 . Based on the response wave received by the RF reader 50 , the management device 60 stores the mounting state of each underfloor device cover 5 provided on the railcar 1 .

As a result, the mounting state of the underfloor device cover 5 can be collectively managed.

In the cover state management system 100 of this embodiment, the cover state detection device 10 is arranged for each of the plurality of underfloor equipment covers 5 . The RF reader 50 collectively receives the response waves from the plurality of underfloor equipment covers 5 .

As a result, the mounting state of the underfloor device cover 5 can be collectively received, so that confirmation work can be completed in a short period of time.

Although the preferred embodiments of the present invention have been described above, the above configuration can be modified, for example, as follows.

In the above-described embodiment, the reed switch 12 is used to detect whether the underfloor equipment cover 5 is in a normal state or a detached state in a non-contact manner. good. Specifically, a contact-type switch is provided at a position that contacts the underfloor equipment cover 5 in the normal state but does not contact the underfloor equipment cover 5 in the detached state. Then, the contact of the contact switch is connected to the state detection circuit 23 . As a result, the disconnection of the state detection circuit 23 changes depending on the mounting state of the underfloor device cover 5 . Further, instead of the reed switch 12 that detects magnetic force, a switch that detects the proximity of a magnetic body may be used.

In the above embodiment, the RF tag 14 is attached to the surface of the spacer 13 . Alternatively, the RF tag 14 may be embedded inside a resin member such as the spacer 13 or the like. Furthermore, the reed switch 12 may be embedded in this resin member. Thereby, the reed switch 12 and the RF tag 14 can be protected from flying objects, water, and the like.

In the above embodiment, the cover state detection device 10 is positioned in the space formed by the recessed portion 2b, but the cover state detection device 10 may be positioned in another space.

REFERENCE SIGNS LIST 1 railway vehicle 5 underfloor equipment cover 10 cover state detection device 11 permanent magnet 12 reed switch (switching device)
13 Spacer 14 RF Tag 21 IC Chip 22 Antenna Section 23 State Detection Circuit 50 RF Reader (Transmitting and Receiving Device)
60 management device 100 cover state management system

Claims (8)

A cover state detection device for detecting whether or not an underfloor equipment cover covering underfloor equipment of a railway vehicle is normally attached,
Depending on whether the underfloor equipment cover is in a normal state in which the underfloor equipment cover is attached at a normal position on the vehicle body of the railway vehicle, or in a detached state in which the underfloor equipment cover is attached at a position deviated from the normal position. a switch for switching the contact state;
It is a passive type that converts electromagnetic waves from the outside into electric power and transmits a response wave, is electrically connected to the switch, and transmits a response wave that includes state information according to the contact state of the switch. an RF tag;
A cover state detection device comprising: The cover state detection device according to claim 1,
with permanent magnets,
The switch is a reed switch whose contact state is switched depending on whether the permanent magnet is in proximity,
In the normal state, the reed switch and the permanent magnet are close to each other,
In the disengaged state, the reed switch and the permanent magnet are separated,
The RF tag includes a state detection circuit in which the state information included in the response wave differs depending on whether a disconnection is included, and the reed switch is electrically connected to the state detection circuit. cover state detection device. The cover state detection device according to claim 2,
The RF tag and the reed switch are arranged on the vehicle body,
A cover state detection device, wherein the permanent magnet is arranged in the underfloor equipment cover. The cover state detection device according to claim 3,
A cover state detection device, wherein the vehicle body is made of metal, and the RF tag is arranged on the vehicle body via a resin spacer. The cover state detection device according to any one of claims 1 to 4,
A cover state detection device, wherein the switch and the RF tag are integrated. The cover state detection device according to any one of claims 1 to 5,
The vehicle body has a recessed portion recessed inward in the vehicle width direction,
The switch and the RF tag are arranged in a space formed by the recess,
The cover state detection device, wherein the RF tag is arranged outside the switch in the vehicle width direction. a cover state detection device according to any one of claims 1 to 6;
a transmitting/receiving device that transmits a transmission wave to the cover state detection device and receives a response wave from the cover state detection device;
a management device that stores an installation state of each underfloor equipment cover provided in the railway vehicle based on the response wave received by the transmission/reception device;
A cover state management system comprising: The cover state management system according to claim 7,
The cover state detection device is arranged for each of the plurality of underfloor equipment covers,
The cover status management system, wherein the transmitting/receiving device collectively receives response waves from the plurality of underfloor equipment covers.

Images