JP2017082555A - Monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology for making it possible to easily check that the state of a movement limitation member attached for supporting horizontal force of a bearing has changed.SOLUTION: A sensor node 1 uses output of a sensor 13a attached to a movement limitation member for supporting horizontal force of a bearing 100 for a structure including an upper structure mounted on a lower structure via the bearing 100 to detect whether or not the state of the movement limitation member has changed. A reporting device 2 requests the sensor node 1 to report a detection result and, on the basis of the detection result reported from the sensor node 1, performs output showing whether or not the state of the movement limitation member has changed, in a form capable of being checked in a visual or acoustic manner.SELECTED DRAWING: Figure 1

Description

  The present invention moves a steel damper attached to support a horizontal force of a support to a structure such as a bridge or a building in which an upper structure is placed on the lower structure via a support, a side block of the support, etc. The present invention relates to a technique for confirming a change in the state of a limiting member.

  Conventionally, there are systems that detect the state of various types of structures such as bridges and buildings (see Patent Documents 1 and 2, etc.). This type of system senses the state of a structure by sensing the physical quantity to be measured on the structure using various types of sensors such as a temperature sensor, a humidity sensor, an acceleration sensor, a displacement sensor, and an infrared image sensor. Monitoring is in progress.

  Further, in a structure in which the upper structure is placed on the lower structure via the support, vibration is transmitted between the upper structure and the lower structure via the support. In order to improve the earthquake resistance of the structure in which the upper structure is placed on the lower structure via the support, a movement limiting member that supports the horizontal force of the support is attached to the structure.

  For example, Patent Document 3 describes that a damper is attached as a movement limiting member. The damper has one end in the axial direction (extension / contraction direction) attached to the upper structure side, the other end attached to the lower structure side, and the magnitude of vibration transmitted from one of the lower structure or the upper structure to the other. Suppresses.

  In addition, there is a type in which a side block is attached to the support as a movement restricting member.

Japanese Patent Laid-Open No. 2008-2986 JP2013-40774A Japanese Patent Laying-Open No. 2005-299078

  However, the movement limiting members such as dampers and side blocks attached to the structure in which the upper structure is placed on the lower structure via the support suppress the relative displacement between the upper structure and the lower structure during vibration. To do. And even if it is a structure which attached the movement restriction member in order to improve earthquake resistance, the vibration of the lower structure at the time of the occurrence of an earthquake is transmitted to an upper structure via a bearing.

  Therefore, even in a structure to which the movement restricting member is attached, the state of the movement restricting member may change if the vibration of the lower structure accompanying the earthquake motion exceeds a certain level. Depending on the changed state of the movement limiting member, the relative displacement between the upper structure and the lower structure during vibration may not be sufficiently suppressed. For this reason, it is necessary to confirm the movement restricting member whose state has changed and adjust the movement restricting member as necessary.

  The purpose of this invention is whether or not the state of the movement restricting member attached to support the horizontal force of the support to a structure such as a bridge or a building in which the superstructure is placed on the substructure via the support has changed. It is to provide a technology that can easily confirm the above.

  The monitoring system of the present invention is configured as follows to achieve the above object.

  This monitoring system includes a state detection device and a notification device.

  The state detection device includes a sensor attached to a movement limiting member that supports the horizontal force of the support with respect to a structure in which the upper structure is placed on the lower structure via the support. The movement restricting member is, for example, a steel damper having one end attached to the upper structure side of the structure portion and the other end attached to the lower structure side of the structure, or a side block of a support. In addition, the sensor may be a strain sensor formed of a piezoelectric element, or may be a proximity sensor, a displacement sensor, an acceleration sensor, or the like as long as it can detect a change in the state of the movement limiting member. Good. The steel damper referred to here is a friction damper or a buckled steel damper, and does not include an oil damper, a viscous damper, and a viscoelastic damper.

  When the steel damper is a friction damper, the sensor may be attached to a member that slides in the axial direction when stress is applied. Further, when the steel damper is a steel damper, a sensor may be attached to a portion that buckles when stress is applied.

  The detection unit detects whether the state of the movement limiting member has changed according to the output of the sensor. For example, the detector detects whether or not the state of the movement restricting member such as the steel damper or the side block of the bearing has changed, and outputs the sensor attached to the movement restricting member such as the steel damper or the side block of the bearing. Is detected based on whether or not a predetermined threshold is exceeded.

  The notification device includes a detection result acquisition unit that requests the state detection device to notify the detection result of the detection unit and acquires the detection result notified from the state detection device. The notification device may be installed around the structure, or may be a portable terminal carried by a maintenance worker or the like. The detection result acquisition unit is a wireless communication unit that performs short-range wireless communication with the state detection device, for example. In addition, the notification device includes an output unit that outputs in a form in which it can be visually or auditorily confirmed whether or not the state of the movement restriction member has changed based on the detection result acquired by the detection result acquisition unit. For example, the output unit may be configured to output a change in the state of the movement restriction member by lighting the lamp, may be configured to display a message, or may be configured to output a message by voice. Or other configurations. The output unit may be configured to output whether or not the state of the movement restriction member has changed at a predetermined timing.

  Thereby, it is possible to easily confirm whether or not the state of the movement limiting member attached to a structure such as a bridge or a building in which the upper structure is placed on the lower structure via the support has changed.

  The notification device may include a communication unit that transmits the detection result acquired by the detection result acquisition unit to the host device. Thereby, it is possible to manage whether or not the bearing is damaged in the host device.

  According to the present invention, whether the state of the movement limiting member attached to support the horizontal force of the support with respect to a structure such as a bridge or a building in which the upper structure is placed on the lower structure via the support is changed. Confirmation can be easily done.

It is a figure which shows the structure of a monitoring system. It is a schematic sectional drawing of the bridge axis direction of an elevated road bridge. It is a schematic sectional drawing of the bridge axis perpendicular direction of an elevated road bridge. It is a figure which shows the attachment state of a friction damper. FIG. 5A is a schematic plan view of the support, and FIG. 5B is a schematic exploded view of the support. It is a figure explaining the structure of a friction damper. It is a figure which shows the structure of the principal part of a sensor node. FIGS. 8A and 8B are plan views showing an example of attaching a sensor to a damper. FIGS. 9A and 9B are plan views showing an example of sensor attachment in the side block of the support. It is a block diagram which shows the structure of the principal part of an alerting | reporting apparatus. It is a block diagram which shows the structure of the principal part of a high-order apparatus. It is a flowchart which shows operation | movement of a sensor node. It is a flowchart which shows operation | movement of an alerting | reporting apparatus. It is a flowchart which shows operation | movement of a high-order apparatus. 15A is a cross-sectional view of the friction damper, and FIG. 15B is a plan view in the A direction in FIG. 15A. 16 (A), (B), and (C) are views showing a steel damper, and FIG. 16 (D) is a view showing an example of attachment of the strain sensor 13a. FIG. 17A is a plan view of the steel damper, and FIG. 17B is a plan view in the A direction in FIG. 17A. 18A is a plan view of the steel damper, and FIG. 18B is a plan view in the A direction in FIG. 18A. FIG. 19A is a schematic plan view of the support, and FIG. 19B is a schematic exploded view of the support. FIG. 20A is a schematic plan view of the bearing, and FIG. 20B is a schematic exploded view of the bearing. FIG. 21A is a schematic plan view of the support, and FIG. 21B is a schematic exploded view of the support. FIG. 22A is a schematic plan view of the support, and FIG. 22B is a schematic exploded view of the support.

  Embodiments of the present invention will be described below.

  FIG. 1 is a diagram illustrating a configuration of a monitoring system. The monitoring system according to this example detects whether or not the state of the movement limiting member that supports the horizontal force of the support of the elevated road bridge (bridge) on which the automobile travels has changed. The elevated road bridge has an upper structure (bridge girder, etc.) placed on a lower structure (bridge pier, etc.) via a support. The elevated road bridge corresponds to the structure referred to in the present invention. The monitoring system according to this example detects whether the state of a friction damper, which will be described later, and the side block of the bearing have changed. In this example, the friction damper and the side block of the bearing function as a movement limiting member that supports the horizontal force of the bearing. The monitoring system of this example includes a plurality of sensor nodes 1, a plurality of notification devices 2, and a host device 3.

  The plurality of sensor nodes 1 are divided into groups P1 to Pn. The number of sensor nodes 1 belonging to each group P1 to Pn may be one or plural. Further, the number of sensor nodes 1 belonging to each group P1 to Pn need not be uniform. In this example, one sensor node 1 is assigned (associated) to each friction damper. In addition, one sensor node 1 is assigned to each side block of the support. One side support is provided with two side blocks. That is, in this example, two sensor nodes 1 are assigned to one support. The sensor node 1 assigned to the friction damper detects whether the state of the friction damper has changed. The sensor node 1 assigned to the side block of the bearing detects whether the state of the side block of the bearing has changed. Details of the grouping of the sensor nodes 1 will be described later. In this example, the sensor node 1 corresponds to the state detection device referred to in the present invention.

  The notification device 2 is provided for each of the groups P1 to Pn of the sensor node 1. The notification device 2 performs communication related to input / output with the sensor nodes 1 belonging to the corresponding groups P1 to Pn.

  The host device 3 is installed in a road control center that manages a traffic network including an elevated road bridge. The host device 3 performs communication related to input / output with each notification device 2.

  The structure of the elevated road bridge will be described. FIG. 2 is a schematic cross-sectional view in the direction of the bridge axis (in this example, the traveling direction of the vehicle) of the elevated road bridge. FIG. 3 is a schematic cross-sectional view of the elevated road bridge in the direction perpendicular to the bridge axis (in this example, the width direction of the vehicle). FIG. 4 is an enlarged view of a region surrounded by a broken line in FIG. The piers of the elevated road bridge are lined up at appropriate intervals in the direction of the bridge axis. In the elevated road bridge, a support 100 is located between a pier that is a lower structure and a main girder that is an upper structure. The bearing 100 is a member that transmits a load (vibration) acting between an upper structure including a main girder and a lower structure including a bridge pier. The road surface on which the automobile travels is formed on a floor slab provided on the upper surface (opposite surface on the pier side) of the main girder.

  In this example, the bridge pier, which is the lower structure of the elevated road bridge, is associated with the notification device 2 on a one-to-one basis. As shown in FIG. 2, the notification device 2 is attached to the side wall of the upper structure. The notification device 2 is attached at substantially the same position as the corresponding pier in the bridge axis direction.

  FIG. 5A is a schematic plan view of the bearing, and FIG. 5B is a schematic exploded view of the bearing. The bearing 100 shown in FIG. 5 is generally called a rubber bearing. The support 100 includes an upper collar 101, a rubber collar 102, a base plate 103, anchor bolts 104, and side blocks 105. The base plate 103 is fixed to the pier by a plurality of anchor bolts 104 (two are shown in FIG. 5B). The rubber hook 102 is located between the upper surface of the base plate 103 (the surface facing the contact surface with the pier) and the lower surface of the upper flange 101 (the surface facing the upper surface of the base plate 103). That is, the support 100 has an upper collar 101, a rubber collar 102, and a base plate 103 stacked in order from the main girder side (in order from the top). The two side blocks 105 are attached to the base plate 103. The two side blocks 105 are attached so as to face both sides of the base plate 103 in the width direction (perpendicular to the bridge axis), and limit the change in the relative position of the upper collar 101 with respect to the base plate 103. The two side blocks 105 correspond to a movement restricting member that supports the horizontal force of the support referred to in the present invention.

  As is well known, the support 100 includes a base plate 103 located on the pier side which is a lower structure and an upper rod 101 located on the main girder side which is an upper structure, and the lower rod and the upper rod are relatively displaced. It is a member to do. In the support 100, the base plate 103 is attached to the upper surface of the bridge pier (the surface facing the upper structure), and the upper rod 101 is attached to the bottom surface of the bridge girder (the surface facing the lower structure). That is, the support 100 is located between the upper structure and the lower structure, as shown in FIGS. In other words, the upper structure is placed on the lower structure via the support 100. FIG. 3 illustrates a case where three supports 100 are arranged in the direction perpendicular to the bridge axis.

  The number of supports 200 arranged in the direction perpendicular to the bridge axis may not be three.

  A fixing stand is formed on the upper surface of the pier, which is a lower structure. This fixing stand is a block having a surface facing one of the side surfaces of the superstructure bridge girder placed on the pier.

  The friction damper 200 is attached between the bridge girder of the upper structure and the fixing base of the lower structure. As shown in FIG. 4, the friction damper 200 has one end portion in the axial direction that expands and contracts attached to the bridge girder, and the other end portion in the axial direction attaches to the fixing table. That is, the friction damper 200 has one end in the axial direction attached to the upper structure side and the other end in the axial direction attached to the lower structure side. In this example, the axial direction of the friction damper 200 is aligned with the direction perpendicular to the bridge axis. FIG. 3 illustrates a case where two friction dampers 200 are attached to one pier.

  Note that the number of friction dampers 200 attached to one pier may not be two. The fixing base may be formed according to the number of friction dampers 200 attached to the pier.

  FIG. 6 is a cross-sectional view of the friction damper according to this example. The left-right direction in FIG. 6 is the axial direction of the friction damper 200. The friction damper 200 includes a die 202 attached to the inner cylinder 201 and a rod 204 attached to the outer cylinder 203. The axial direction of the friction damper 200 is the insertion direction of the inner cylinder 201 with respect to the outer cylinder 203, and is the left-right direction in FIG. A rod 204 extending in the axial direction is attached to the inside of the outer cylinder 203. A die 202 having a hole penetrating in the axial direction is attached to the inside of the inner cylinder 201. The inner diameter of the hole of the die 202 is slightly smaller than the outer shape of the rod 204. The friction damper 200 is configured such that the rod 204 is inserted into the hole of the die 202 when the inner cylinder 201 is inserted into the outer cylinder 203. That is, the friction damper 200 expands and contracts when a stress exceeding the friction force (static friction or dynamic friction) generated on the contact surface between the die 202 and the rod 204 is acting in the axial direction. Further, when the stress acting in the axial direction becomes less than the friction force generated on the contact surface between the die 202 and the rod 204, the friction damper 200 maintains the state at that time.

  The friction damper 200 functions as a movement limiting member that supports the horizontal force of the support 100. In other words, the friction damper 200 also corresponds to a movement limiting member that supports the horizontal force of the bearing referred to in the present invention. In the friction damper 200, a stress corresponding to the magnitude of vibration transmitted between the upper structure and the lower structure acts in the axial direction. The stress acting in the axial direction of the friction damper 200 increases as the vibration transmitted between the upper structure and the lower structure increases.

  The notification device 2 and the groups P1 to Pn of the sensor node 1 are associated on a one-to-one basis. Moreover, as above-mentioned, the alerting | reporting apparatus 2 and the pier are matched by 1 to 1. The groups P1 to Pn of the sensor node 1 and the piers are associated one to one. That is, the sensor node 1 belonging to the groups P1 to Pn associated with the notification device 2 is associated with the friction damper 200 attached to the pier associated with the notification device 2 or the side block 105 of the bearing 100. It is.

  FIG. 7 is a block diagram illustrating a configuration of a main part of the sensor node. The sensor node 1 includes a control unit 11, a power supply unit 12, a sensor unit 13, and a short-range wireless communication unit 14.

  The control unit 11 controls the operation of the sensor node 1 main body. Further, the sensor node 1 stores a node code for identifying its own device in a memory (not shown) provided in the control unit 11. This node code is, for example, an n-digit code, and the leading m-digit (n> m) is a code indicating the corresponding pier.

  The power supply unit 12 supplies operation power to each part of the sensor node 1 main body. The power supply unit 12 uses a battery built in the sensor node 1 body as a power source, and supplies operation power to each part of the sensor node 1 body.

  The power source unit 12 is configured to supply an operating power source to each part of the sensor node 1 body using an externally connected battery or a built-in or externally connected power generation unit (solar cell or the like) as a power source. Also good.

  A strain sensor 13 a is connected to the sensor unit 13. The strain sensor 13a of the sensor node 1 assigned to the friction damper 200 is attached to the inner cylinder 201 of the friction damper 200 as shown in FIG. FIG. 8A is a plan view of the friction damper viewed from a direction orthogonal to the axial direction, and FIG. 8B is a plan view of the friction damper viewed from the direction A shown in FIG. 8A. . The friction damper 200 is distorted in the inner cylinder 201 when a certain amount of stress (first stress) acts in the axial direction. The strain sensor 13 a is a piezoelectric sensor that outputs a voltage corresponding to the strain of the inner cylinder 201.

  Note that the friction damper 200 causes the inner cylinder 201 to slide in the axial direction relative to the outer cylinder 203 when a second magnitude of stress greater than the first magnitude of stress acts in the axial direction.

  In the sensor unit 13 of the sensor node 1 assigned to the friction damper 200, the magnitude of the stress received in the axial direction by the friction damper 200 exceeds the predetermined stress magnitude (stress threshold) by the output of the strain sensor 13a. By detecting whether or not the inner cylinder 201 of the friction damper 200 is slid in the axial direction with respect to the outer cylinder 203, it is detected. This stress threshold value is set to a value slightly smaller than the magnitude of the stress with which the inner cylinder 201 of the friction damper 200 slides in the axial direction with respect to the outer cylinder 203. The sensor unit 13 compares the output voltage of the strain sensor 13a with a voltage corresponding to the stress threshold to determine whether the inner cylinder 201 of the friction damper 200 has slid in the axial direction with respect to the outer cylinder 203 (friction). Whether the state of the damper 200 has changed) is detected. The sensor unit 13 corresponds to the detection unit referred to in the present invention.

  Further, the strain sensor 13a of the sensor node 1 assigned to the side block 105 of the support 100 is attached to the side block 105 as shown in FIG. 9A is a plan view of the bearing viewed from the bridge axis direction, and FIG. 9B is a plan view of the bearing viewed from the A direction (perpendicular to the bridge axis) shown in FIG. 9A. It is. The strain sensor 13 a is a piezoelectric sensor that outputs a voltage corresponding to the deformation of the side block 105 of the support 100.

  Also, the sensor unit 13 of the sensor node 1 assigned to the side block 105 of the support 100 compares the output voltage of the strain sensor 13a with a predetermined threshold voltage to determine whether the side block 105 of the support 100 is deformed. Detect if.

  As described above, in this example, two sensor nodes 1 are assigned to one support 100. However, the sensor node 1 may be configured to include a plurality of sensor units 13 and may be configured to be allocated to a plurality of supports 100 and a plurality of friction dampers 200. That is, the sensor unit 13 included in the sensor node 1 (including the strain sensor 13a) is not limited to one and may be a plurality.

  When the sensor unit 13 detects that the state of the friction damper 200 has changed or that the side block 105 of the support 100 has been deformed (ie, the state of the side block 105 has changed), the control unit 11 stores that fact in the memory. Remember.

  The short-range wireless communication unit 14 controls short-range wireless communication with the notification device 2.

  FIG. 10 is a block diagram illustrating a configuration of a main part of the notification device. The notification device 2 includes a control unit 21, a power supply unit 22, an operation unit 23, a display unit 24, a short-range wireless communication unit 25, and a wireless communication unit 26.

  The control unit 21 controls the operation of the notification device 2 main body. Further, the notification device 2 stores a device code for identifying the device itself in a nonvolatile memory (not shown) provided in the control unit 21. This device code is an m-digit code, for example, and is a code indicating a corresponding pier.

  The power supply unit 22 supplies operating power to each part of the main body of the notification device 2. The power supply unit 22 includes a battery connection terminal 22a to which a battery is connected. When a battery is connected to the battery connection terminal 22a, the power supply unit 22 uses the battery connected to the battery connection terminal 22a as a power source and supplies operating power to each part of the notification device 2 body. In other words, when the battery is not connected to the battery connection terminal 22a, the notification device 2 does not supply operating power to each part of the notification device 2 main body.

  In this example, the notification device 2 uses a commercial power source as a power source and does not supply operating power to each part of the main body of the notification device 2, so that a cable for supplying commercial power is installed when the notification device 2 is installed. Does not involve construction.

  Whether the operation unit 23 has detected that the state of any of the friction dampers 200 attached to the pier associated with the main body of the notification device 2 has been detected, and any of the operation units 23 attached to the pier associated with the main body of the notification device 2 A confirmation button 23a that is operated when outputting whether or not it is detected that the side block 105 of the support 100 is deformed. The confirmation button 23a is exposed on the surface of the main body of the notification device 2 and can be easily operated.

  The display unit 24 includes a first notification lamp 24a that is turned on when it is detected that the state has changed in any of the friction dampers 200 attached to the pier associated with the main body of the notification device 2. . In addition, the display unit 24 includes a second notification lamp 24b that is turned on when it is detected that the side block 105 of any of the supports 100 attached to the pier associated with the main body of the notification device 2 is deformed. ing. The display unit 24 does not turn on the first notification lamp 24a when it is not detected that the state has changed in all the friction dampers 200 attached to the pier associated with the main body of the notification device 2. Moreover, the display part 24 does not light the 2nd notification lamp 24b, when it has not detected that it deform | transformed in the side block 105 of all the support 100 attached to the pier matched with the alerting | reporting apparatus 2 main body. . The emission colors of the first notification lamp 24a and the second notification lamp 24b may be the same color, but are preferably different colors from the viewpoint of preventing misidentification by maintenance personnel and the like. For example, the emission color of the first notification lamp 24a may be red, and the emission color of the second notification lamp 24b may be yellow.

  The short-range wireless communication unit 25 controls short-range wireless communication with the sensor nodes 1 belonging to the corresponding groups P1 to Pn.

  The wireless communication unit 26 controls wireless communication related to input / output with the host device 3.

  FIG. 11 is a block diagram illustrating a configuration of a main part of the host device. The host device 3 includes a control unit 31, an operation unit 32, a display unit 33, a storage unit 34, a wireless communication unit 35, and a traffic network database 36 (hereinafter referred to as a traffic network DB 36). Yes.

  The control unit 31 controls the operation of the host device 3 main body.

  An input device such as a keyboard and a mouse is connected to the operation unit 32. The operation unit 32 accepts input to the main body of the host device 3 in accordance with the operation of the input device by the operator.

  A display device such as a liquid crystal display is connected to the display unit 33. The display unit 33 controls screen display on the connected display device.

  The storage unit 34 includes a memory used as a working area for temporarily storing data generated during operation.

  The wireless communication unit 35 controls wireless communication related to input / output with the notification device 2. The communication between the host device 3 and the notification device 2 may use a public line or a network such as the Internet.

  In the monitoring system according to this example, the traffic network DB 36 stores map data of a traffic network including an elevated road bridge that monitors the state. Further, in the monitoring system according to this example, data indicating the position of the pier on the map is stored for each pier of the elevated bridge whose state is to be monitored. Specifically, the pier identification code (in this example, the device code of the notification device 2), latitude data indicating the position of the pier, and longitude data are stored in association with each other. Data stored in the traffic network DB 36 is collectively referred to as traffic network data.

  The operation of the monitoring system according to this example will be described below.

  FIG. 12 is a flowchart showing the operation of the sensor node. The sensor node 1 assigned to the friction damper 200 and the sensor node 1 assigned to the side block 105 of the support 100 differ only in the detection target, and the processing shown in FIG. 12 is performed.

  When the sensor node 1 assigned to the friction damper 200 detects that the state of the friction damper 200 to be detected is changed by the sensor unit 13, the detection result of the control unit 11 indicates that (the state of the friction damper 200 is changed). Store in the memory (s1, s3). When the sensor node 1 assigned to the friction damper 200 receives the detection result notification request from the notification device 2 in the short-range wireless communication unit 14, the state of the friction damper 200 stored in the memory of the control unit 11. The notification device 2 is notified of the presence or absence of a change (s2, s4).

  On the other hand, when the sensor node 1 assigned to the side block 105 of the support 100 detects that the detection target side block 105 is deformed by the sensor unit 13, the control unit detects that (the side block 105 is deformed) as a detection result. 11 (s1, s3). Further, when the sensor node 1 assigned to the side block 105 of the support 100 receives the detection result notification request from the notification device 2 in the short-range wireless communication unit 14, the sensor node 1 stored in the memory of the control unit 11. The notification device 2 is notified of the presence or absence of deformation of the side block 105 (s2, s4).

  The sensor node 1 repeats the processes of s1 to s4. When the sensor node 1 transmits the detection result in s4, the sensor node 1 associates its own node code with the detection result.

  FIG. 13 is a flowchart showing the operation of the notification device. When the confirmation button 23a is operated by a maintenance person or the like (s11), the notification device 2 transmits a detection result notification request to all the sensor nodes 1 belonging to the associated groups P1 to Pn (s12). .

  In addition, the maintenance person who operates the confirmation button 23 a connects the battery to the battery connection terminal 22 a of the notification device 2.

  When transmitting the detection result notification request in s12, the notification device 2 waits for a predetermined time to elapse (s13). This fixed time is a little longer than the time required for the sensor node 1 to perform the processes related to s2 and s4 described above. That is, the notification device 2 waits for a detection result to be transmitted from each sensor node 1 belonging to the associated groups P1 to Pn in s13. The notification device 2 transmits from one of the sensor nodes 1 belonging to the groups P1 to Pn to which the received detection result is associated with the node code associated with the detection result received by the short-range wireless communication unit 25. It can be determined whether it has been done. It can also be determined whether the sensor node 1 that has received the detection result is assigned to the friction damper 200 or assigned to the side block 105 of the support 100.

  When the notification device 2 determines that a predetermined time has passed in s13, the determination device determines whether or not a change in the state of any of the friction dampers 200 attached to the associated pier is detected. Processing is performed (s14). For the sensor node 1 that has received the detection result, the notification device 2 determines whether or not the state of the friction damper 200 associated with the sensor node 1 has changed according to the detection result. In addition, the notification device 2 has a high possibility that the sensor node 1 is damaged with respect to the sensor node 1 for which the detection result has not been transmitted while waiting for a predetermined time to elapse in s13. Then, it is determined that the state of the friction damper 200 associated with the sensor node 1 has changed.

  Moreover, the alerting | reporting apparatus 2 performs the determination process which determines whether it has detected that the side block 105 of any support 100 attached to the associated pier was deform | transformed (s15). For the sensor node 1 that has received the detection result, the notification device 2 determines whether the side block 105 of the support 100 corresponding to the sensor node 1 has been deformed based on the detection result. In addition, the notification device 2 has a high possibility that the sensor node 1 is damaged with respect to the sensor node 1 for which the detection result has not been transmitted while waiting for a predetermined time to elapse in s13. It is determined that the side block 105 of the support 100 associated with the sensor node 1 has been deformed. Either of s14 and s15 may be performed first.

  When the determination process for s14 and s15 is completed, the notification device 2 displays the current determination result on the display unit 24 (s16). Specifically, when the notification device 2 determines that the state of any of the friction dampers 200 attached to the associated pier has changed, the notification device 2 turns on the first notification lamp 24a. When the notification device 2 determines that the state of all the friction dampers 200 attached to the associated piers has not changed, the notification device 2 does not turn on the first notification lamp 24a (holds the turn-off state). Further, when the notification device 2 determines that the side block 105 of any of the supports 100 attached to the associated pier is deformed, the notification device 2 turns on the second notification lamp 24b. When the notification device 2 determines that the side blocks 105 of all the supports 100 attached to the associated piers are not deformed, the notification device 2 does not light the second notification lamp 24b (holds the light-off state).

  Therefore, the maintenance staff confirms whether the state of the friction damper 200 attached to the pier associated with the notification device 2 that has operated the confirmation button 23a has changed, and the side block 105 of the support 100 has been deformed. It is easy to check whether or not.

  Further, the notification device 2 transmits the determination result of the determination processing relating to s16 to the higher-level device 3 (s17), and returns to s11.

  Moreover, you may make the alerting | reporting apparatus 2 perform the process after s12, when a battery is connected to the battery connection terminal 22a. In this way, the maintenance staff confirms whether the state of the friction damper 200 attached to the pier associated with the notification device 2 has changed without operating the confirmation button 23a, and the bearing 100. It can be confirmed whether or not the side block 105 is deformed.

  Moreover, in said example, the alerting | reporting apparatus 2 is output in the form (The lighting state of the 1st notification lamp 24a and the 2nd notification lamp 24b) which can confirm the determination result of the determination process concerning s14 and s15 visually. However, the determination result may be output as a voice message (a form that can be confirmed by hearing), or the determination result may be displayed as a message. The form for outputting the determination result may be any form as long as it can be visually or auditorily confirmed by the maintenance staff.

  FIG. 14 is a flowchart showing the operation of the host device. When the wireless communication unit 35 receives the determination result transmitted from any of the notification devices 2 (s21), the higher-level device 3 stores the received determination result in the storage unit 34 (s22), and returns to s21. In s22, the received determination result is stored in association with the device code of the notification device 2 that has transmitted the determination result.

  Further, when there is a request to start counting of the determination results (s23), the host device 3 performs a counting process of counting the determination results notified from each notification device 2 stored in the storage unit 34 (s24). The operator can input an aggregation start request relating to s23 to the host device 3 by performing a predetermined input operation on the operation unit 32.

In s24, based on the latest determination result memorize | stored in the memory | storage part 34, an pier is classified into either of the following (1)-(4).
(1) Friction damper 200 whose state has changed and bridge pier in which side block 105 of deformed support 100 is not detected (2) Friction damper 200 whose state has changed is detected and side block 105 of deformed support 100 is detected Unsupported bridge pier (3) The friction damper 200 whose state has changed is not detected and the side block 105 of the deformed bearing 100 is detected. (4) The friction damper 200 whose state has changed is detected and the deformed bearing. The pier host device 3 from which 100 side blocks 105 have been detected outputs the tabulation result of the tabulation processing relating to s24 (s25), and returns to s21. In s25, for example, the pier classification is output as a list. Moreover, the structure which shows and displays the classification of a pier on a map may be sufficient. The aggregation result may be displayed on a display device such as a liquid crystal display connected to the display unit 33, or may be output as print data to a printer.

  Thereby, the operator can easily check the pier on which the friction damper 200 whose state has changed and the pier on which the side block 105 of the support 100 is deformed are deformed.

  In the above example, one pier is associated with the notification device 2, but a plurality of adjacent piers may be associated with each other. In this way, the required number of notification devices 2 can be reduced. Moreover, in said example, although the alerting | reporting apparatus 2 was attached to the side wall, as long as it is the circumference | surroundings of a corresponding pier, you may attach not only to a side wall but to another place. Furthermore, the notification device 2 may be configured by a portable terminal carried by a maintenance worker (the notification device 2 may be configured not to be installed around the corresponding pier). In this case, the notification device 2 does not correspond to the groups P1 to Pn of the specific sensor node 1.

  The sensor node 1 may have a configuration in which a plurality of strain sensors 13 a are connected to the sensor unit 13. In this way, it is possible to detect whether or not the state of the plurality of friction dampers 200 has been changed by one sensor node 1. In addition, it is possible to detect whether or not the plurality of side blocks 105 are deformed by one sensor node 1. For example, for one pier, a configuration may be adopted in which one sensor node 1 detects whether or not the state of all the friction dampers 200 attached to the pier has changed. On the other hand, you may make it the structure which detects whether it deform | transformed about the side block 105 of all the supports 100 attached to the bridge pier with one sensor node 1. FIG. Further, for one pier, one sensor node 1 detects all the friction dampers 200 attached to the pier and the side blocks 105 of all the supports 100 attached to the pier. It may be.

  In the above example, the friction damper 200 has the axial direction aligned with the direction perpendicular to the bridge axis. However, the axial direction may be the bridge axis direction, or the bridge axis from an angle parallel to the bridge axis perpendicular direction. The range up to the angle of the direction may be matched, or the vertical direction of the structure may be matched.

  Further, the friction damper having the configuration shown in FIG. 15 may be used as the friction damper. 15A is a cross-sectional view of the friction damper, and FIG. 15B is a plan view in the A direction in FIG. 15A.

  The friction damper 210 shown in FIG. 15 has a configuration in which an intermediate plate 211 is sandwiched between two outer plates 212 and 213. A brake material having a relatively large friction coefficient is provided on a contact surface between the middle plate 211 and the outer plates 212 and 213. The friction damper 210 generates a frictional force generated by the brake material by fastening the intermediate plate 211 and the outer plates 212 and 213 with bolts via disc springs and washers. The middle plate 211 is formed with a long hole whose major axis is in the axial direction (left-right direction in FIG. 15).

  Therefore, in the friction damper 210, when a certain amount of stress (first stress) acts in the axial direction, the middle plate 211 is distorted. The strain sensor 13 a is attached to the middle plate 211 and detects the strain of the middle plate 211.

  In the friction damper 210, when a second magnitude stress larger than the first magnitude stress acts in the axial direction, the middle plate 211 slides in the axial direction with respect to the outer plates 212 and 213.

  Moreover, it may replace with the friction dampers 200 and 210 mentioned above, and may use the steel material damper shown in FIGS. A steel damper 220 shown in FIG. 16C is an axial yield type hysteresis damper. This steel damper 220 has a configuration in which the center steel shown in FIG. 16A is fitted into the buckling restraint shown in FIG. The central steel material is a member in which steel plates are provided at both ends of the unbonded material. The unbond material is a buffer material. The buckling restraint material buckles and restrains the inserted center steel material by a steel pipe and concrete.

  In the steel damper 220, the insertion direction of the central steel material with respect to the buckling restraint material is the axial direction.

  FIG. 16D is an enlarged view of a region surrounded by a broken line in FIG. As shown in FIG. 16D, the strain sensor 13a is attached to the steel plate of the central steel material.

  In the steel damper 220, when a certain amount of stress (first stress) acts in the axial direction, the central steel material buckles and strain occurs. The strain sensor 13a detects the strain of the central steel material.

  FIG. 17A is a plan view of the steel damper, and FIG. 17B is a plan view in the A direction in FIG. 17A. The steel damper 230 shown in FIG. 17 is of a wall type. This steel damper 230 has a configuration in which a corrugated core material is sandwiched between two constraining materials. The axial direction of the steel damper 230 is the left-right direction in FIG.

  FIG. 18A is a plan view of the steel damper, and FIG. 18B is a plan view in the A direction in FIG. 18A. The steel damper 240 shown in FIG. 18 is a panel type. The steel damper 240 is a damping member obtained by buckling and stiffening a damping panel such as a low yield point steel with a stiffening stiffener. The axial direction of the steel damper 240 is the diagonal direction of the vibration control panel.

  In this steel damper 240, when a certain amount of stress (stress of the first magnitude) acts in the axial direction, the vibration damping panel buckles and distortion occurs in the vibration damping panel. The strain sensor 13a detects the strain of the vibration control panel.

  Further, the steel damper referred to in the present invention may be other than those shown in FIGS. 6 and 14 to 18. However, the steel damper referred to in the present invention is a friction damper, a buckled-restrained steel damper, or a buckled stiffened steel damper, and does not include an oil damper, a viscous damper, and a viscoelastic damper.

  Further, the bearing 100 is not limited to the one described above, and the bearings shown in FIGS. 19 to 22 may be used. The bearings shown in FIGS. 19 to 22 are well known and will be briefly described here.

  The bearing 110 shown in FIG. 19 is generally called a line bearing. FIG. 19A is a schematic plan view of the support, and FIG. 19B is a schematic exploded view of the support. A support 110 shown in FIG. 19 has a structure in which an upper collar 111 is held between a lower collar 112 and a pinch plate 113. The anchor bolt 114 is a bolt that fixes the support 110 to the lower structure of the elevated road bridge. The anchor bolt 114 is fixed by driving into the lower structure of the elevated road bridge through the pinch plate 113, the upper rod 111, and the lower rod 112.

  The support 110 restricts the upper collar 111 from moving relative to the lower collar 112 by a protrusion 112a formed integrally with the lower collar 112 as shown in FIG. The strain sensor 13a is attached to the protrusion 112a, and outputs a voltage corresponding to the deformation of the protrusion 112a. That is, in this support 110, the protrusion 112a corresponds to a movement limiting member that supports the horizontal force of the support referred to in the present invention.

  The bearing 120 shown in FIG. 20 is generally called a sealed rubber bearing plate bearing (BP-B bearing). FIG. 20A is a schematic plan view of the bearing, and FIG. 20B is a schematic exploded view of the bearing. The support 120 shown in FIG. 20 has a structure in which a Teflon plate 124, an intermediate plate 125, a compression ring 126, a rubber plate 127, and a seal ring 128 are arranged between an upper rod 121 and a lower rod 122. It moves relative to the lower eyelid 122. The anchor bolt 129 is a bolt that fixes the support 120 to the lower structure of the elevated road bridge. The anchor bolt 129 is fixed by driving into the lower structure of the elevated road bridge through the lower arm 112 or the like.

  Further, a side block 123 is attached to the lower collar 122 in the support 120. The side block 123 restricts the upper rod 121 from moving relative to the lower rod 122. The strain sensor 13 a is attached to the side block 123 and outputs a voltage corresponding to the deformation of the side block 123. That is, in this support 120, the side block 123 corresponds to a movement limiting member that supports the horizontal force of the support referred to in the present invention.

  Further, the bearing 130 shown in FIG. 21 is generally called a rubber bearing (shear type movable / fixed type). FIG. 21A is a schematic plan view of the support, and FIG. 21B is a schematic exploded view of the support. The support 130 shown in FIG. 21 has a structure in which a first shear key 137, a rubber rod 132, and a second shear key 138 are arranged between the upper rod 131 and the lower rod 133 from the upper rod 131 side. The lower rod 133 is attached to the base plate 135 to which the anchor bolt 136 is attached. The anchor bolt 136 is fixed by driving into the lower structure of the elevated road bridge. The rubber hook 132 is attached by a bolt passed through the upper collar 131 on the surface side facing the upper collar 131, and is attached by a bolt passed through the lower collar 133 on the surface side opposed to the lower collar 133.

  Further, a side block 134 is attached to the lower collar 133 in the support 130. The side block 134 restricts the upper rod 131 from moving relative to the lower rod 133. The strain sensor 13 a is attached to the side block 134 and outputs a voltage corresponding to the deformation of the side block 134. That is, in the support 130, the side block 134 corresponds to a movement limiting member that supports the horizontal force of the support referred to in the present invention.

  A support 140 shown in FIG. 22 is generally called a horizontal reaction force dispersion / seismic isolation support. FIG. 22A is a schematic plan view of the support, and FIG. 22B is a schematic exploded view of the support. The support 140 shown in FIG. 22 has a structure in which a first shear key 146, a rubber collar 142, and a second shear key 147 are arranged between the upper collar 141 and the lower collar 143 from the upper collar 141 side. The lower rod 143 is attached to the base plate 145 to which the anchor bolt 148 is attached. The anchor bolt 148 is fixed by driving into the lower structure of the elevated road bridge. The rubber hook 146 is attached to the upper hook 141 by the first shear key 146 and is attached to the lower hook 143 by the second shear key 147.

  Further, a side block 145 is attached to the base plate 145 in the support 140. This side block 145 restricts the movement of the upper collar 141 relative to the lower collar 143. The strain sensor 13 a is attached to the side block 145 and outputs a voltage corresponding to the deformation of the side block 134. That is, in the support 140, the side block 145 corresponds to a movement limiting member that supports the horizontal force of the support referred to in the present invention.

  In the above example, the sensor node 1 uses the strain sensor 13a to detect the state change of the movement limiting member that supports the horizontal force of the support 100. However, the sensor node 1 may use a displacement sensor, an acceleration sensor, or the like. Good. A sensor such as a displacement sensor or an acceleration sensor is attached to a movement limiting member that supports the horizontal force of the support 100.

  The sensor unit 13 of the sensor node 1 may be configured to sense (measure) a measurement target physical quantity such as the support 100 with a displacement sensor, an acceleration sensor, or the like. For example, the sensor node 1 may be configured to measure the vibration period, vibration acceleration, vibration speed, and vibration amplitude of the support 100. What is necessary is just to determine the kind of sensor which the sensor part 13 has according to the measurement object physical quantity concerning the support to sense. Moreover, the sensor which the sensor part 13 has may be one, and plural may be sufficient as it.

  The sensor node 1 senses (measures) a physical quantity to be measured such as the support 100 with a proximity sensor, a displacement sensor, an acceleration sensor, or the like, thereby supporting a movement limiting member that supports the horizontal force of the support 100 (for example, the steel in the above example). As a state change of a damper, a side block, etc.), not only expansion and contraction but also damage and abnormality can be detected. In this case, the measurement target physical quantity transmitted from the sensor node 1 to the notification device 2 may be a signal indicating the maximum absolute value such as the measured acceleration or displacement, or may be the maximum measured acceleration or displacement. It may be a signal indicating a difference value between the value and the minimum value (that is, the magnitude of the amplitude), a signal indicating an average value such as measured acceleration or displacement, or other signals. It may be. Sensors such as a proximity sensor, a displacement sensor, and an acceleration sensor are attached to a movement limiting member that supports the horizontal force of the support 100.

  Further, in the above example, the description has been given by taking an elevated road bridge (bridge) as an example of the structure, but the present invention can be applied to structures other than bridges such as buildings.

DESCRIPTION OF SYMBOLS 1 ... Sensor node 2 ... Notification apparatus 3 ... Host apparatus 11 ... Control part 12 ... Power supply part 13 ... Sensor part 13a ... Strain sensor 14 ... Short-range wireless communication part 21 ... Control part 22 ... Power supply part 22a ... Battery connection terminal 23 ... Operation unit 23a ... confirmation button 24 ... display unit 24a ... first notification lamp 24b ... second notification lamp 25 ... short-range wireless communication unit 26 ... wireless communication unit 31 ... control unit 32 ... operation unit 33 ... display unit 34 ... Storage unit 35 ... wireless communication unit 36 ... traffic network database (traffic network DB)
100, 110, 120, 140 ... bearings 105, 123, 134, 144 ... side block 112a ... projections 200, 210 ... friction dampers 220, 230, 240 ... steel dampers

Claims (9)

For a structure in which the upper structure is placed on the lower structure via a support, a sensor attached to a movement limiting member that supports the horizontal force of the support; and
A state detection device comprising: a detection unit that detects whether or not the state of the movement restriction member has changed according to the output of the sensor; and
A detection result acquisition unit that requests the state detection device to notify a detection result in the detection unit, and acquires a detection result notified from the state detection device;
A monitoring system comprising: a notification device comprising: an output unit configured to output in a form that can visually or auditorily confirm whether or not the state of the movement restriction member has changed based on a detection result acquired by the detection result acquisition unit.   The monitoring system according to claim 1, wherein the movement restriction member includes a steel damper having one end attached to the upper structure side of the structure portion and the other end attached to the lower structure side of the structure.   The monitoring system according to claim 2, wherein the sensor includes a strain sensor attached to a portion receiving the stress of the steel damper.   The monitoring system according to claim 1, wherein the movement restriction member includes a side block of the support.   The monitoring system according to claim 4, wherein the sensor includes a strain sensor attached to a side block of the bearing.   The monitoring system according to any one of claims 1 to 5, wherein the output unit outputs, in a form in which it can be visually or auditorily confirmed whether or not the state of the movement restriction member has changed at a predetermined timing.   The monitoring system according to claim 1, wherein the notification device is installed around the structure.   The monitoring system according to claim 1, wherein the notification device is a mobile terminal.   The monitoring system according to claim 1, wherein the notification device includes a communication unit that transmits a detection result acquired by the detection result acquisition unit to a higher-level device.

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