JP2017044035A - Operation detection system and operation detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect an open/closed state surely even for a plurality of doors, with an inexpensive structure.SOLUTION: In a casing 13, an optical fiber strain sensor 33 formed in the middle of an optical fiber 32 and an operation part 23 for elongating the optical fiber strain sensor 33 based on a force acting from the outside are accommodated. An operation detection device includes: a plurality of operation detection members 3 connected in series via the optical fiber 32 extending from the casing 13; a light output member 43 for outputting light to each operation detection member 3 via the optical fiber 32; a wavelength detection member 43 for detecting the wavelength of the light outputted from the light output member 43 and reflected by the optical fiber strain sensor 33 of the operation detection member 3; and an operation determination member 43 for determining whether or not the operation part of the operation detection member has acted, based on the wavelength detected in the wavelength detection member 43.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a motion detection system and a motion detection device.

  Conventionally, as a door open / close detection device, for example, a contact portion to a detected body including a first movable member that moves according to opening / closing of the door, and a position away from the contact portion, the first movable A second movable member that moves according to the movement of the member, and a sensor unit having means for bending the optical fiber by the movement of the second movable member; and the first movable member between the first movable member and the second movable member. A configuration including a release cable that transmits the movement of the movable member is known (for example, see Patent Document 1).

  However, the conventional door opening / closing detection device does not assume that the opening / closing detection of a plurality of doors is performed simultaneously. For example, in a power plant or the like, a plurality of fire doors are provided, and if they are to be performed by the door opening / closing detection device, it is necessary to carry out wiring work for each door, resulting in very expensive equipment. .

  Also, as a sensor, a force receiving plate that deforms according to the tension from the warning line, and an FBG (Fiber Bragg) that is integrated with the force receiving plate and changes the wavelength according to the strain generated in the force receiving plate and reflects it. (Gratings) sensors are known (for example, see Patent Document 2).

  However, in the conventional sensor, the FBG sensor is only integrated with the force receiving plate by being covered with a Kevlar cloth and forming a protective film, and there is a variation in sensitivity among the sensors.

JP 2002-14004 A JP 2010-140501 A

  It is a first object of the present invention to provide an operation detection system that can reliably detect an open / close state with an inexpensive configuration even with a plurality of doors.

  Moreover, this invention makes it the 2nd subject to provide the operation | movement detection member which can be operated in the stable state without a variation in sensitivity between products.

As a means for solving the first problem, the present invention provides:
An optical fiber extending from the casing and containing an optical fiber strain sensor formed in the middle of the optical fiber in the casing and an operation unit for extending the optical fiber strain sensor based on a force acting from the outside. A plurality of motion detection members connected in series via
A light output member that outputs light to each motion detection member via the optical fiber;
A wavelength detection member that detects the wavelength of light output from the light output member and reflected by the optical fiber strain sensor of the motion detection member;
Based on the wavelength detected by the wavelength detection member, an operation determination member that determines whether or not the operation unit of the operation detection member has operated,
An operation detection system is provided.

  With this configuration, it is possible to determine the operation status of the plurality of motion detection members based on the reflected light from each motion detection member. Further, since the motion detection members are connected in series by optical fibers, the laying work can be minimized. Therefore, the facility cost can be greatly reduced.

The motion detection member is attached to the frame body side to which the door is attached,
The door is preferably attached with a drive member for operating the operation part of the operation detection member when the frame is closed.

  With this configuration, it is possible to detect the open / closed state of a plurality of doors such as a fire door of a power plant or plant.

The operation part of the motion detection member is composed of a plate-like body made of a magnetic material, is elastically deformable in the thickness direction, one end is fixed to the casing, and the suctioned part is formed at the other end. And
It is preferable that the driving member includes a permanent magnet that generates an attractive force by the magnetic force in the attracted portion.

  With this configuration, the operating portion can be formed with a simple and inexpensive configuration made of a plate-like body. And since this operation | movement part can be operated with a permanent magnet, it becomes possible to obtain the stable operation state.

As a means for solving the second problem, the present invention provides:
An optical fiber strain sensor formed in the middle of the optical fiber;
Both ends are fixed in a plate-like shape with the optical fiber strain sensor being given a constant tension on one surface, and elastically deformed in the plate thickness direction by an external force, and the one surface side is curved outward. A sensor mounting portion for extending the optical fiber strain sensor by:
An operation detecting member is provided.

  With this configuration, when the optical fiber strain sensor is extended by external force acting on the sensor mounting portion and elastically deforming in the thickness direction while light is incident on the optical fiber, the wavelength of the light reflected there changes. . Based on the change in the wavelength of the reflected light, it can be determined whether the sensor mounting portion is driven by magnetism. Since the optical fiber strain sensor is fixed to the sensor mounting portion with a certain tension applied, variations in sensitivity do not occur between the motion detection members. Moreover, since the optical fiber strain sensor is fixed to the sensor mounting portion that can be elastically deformed in the plate thickness direction, the displacement amount of the sensor mounting portion can be increased compared to the deformation amount of the optical fiber strain sensor, and the operation Can be reliably detected.

  Preferably, the sensor mounting portion is made of a magnetic material, one end portion is fixed to the casing, and the other end portion is formed with a portion to be attracted that can be attracted by a permanent magnet disposed outside.

  With this configuration, the sensor mounting portion can be elastically deformed and the optical fiber strain sensor attached thereto can be extended simply by applying a magnetic force to the attracted portion with the permanent magnet.

  It is preferable that the optical fiber strain sensor is attached to the sensor attachment portion in a state where a preset tension is applied in the extending direction.

  With this configuration, the mounting state of the optical fiber strain sensor can be set so that light incident on the optical fiber is reflected at a desired wavelength.

  Preferably, the casing is provided with a deformation amount adjusting portion that enables adjustment of the elastic deformation amount of the sensor mounting portion.

  With this configuration, it is possible to freely change the extension amount in the optical fiber strain sensor and adjust its sensitivity.

The deformation amount adjusting unit includes a screw member capable of adjusting a projecting dimension to the inside by changing a screwing position to the casing,
The sensor mounting part is formed with a sucked part obtained by cutting and raising one end part, and a remaining contact part,
It is preferable that the tip of the screw member can be brought into contact with the contact portion by elastic deformation of the sensor mounting portion in the plate thickness direction.

  With this configuration, it is possible to form the sucked portion and the contact portion only by performing a simple process of cutting and raising one end portion of the plate-like body. The amount of deformation of the sensor mounting portion can be adjusted simply by changing the position where the contact portion abuts by adjusting the tip position of the screw member.

As a means for solving the above problems, the present invention provides:
In the casing,
An optical fiber strain sensor having a linear portion at least in part;
A fixing portion attached to a linear portion of the optical fiber strain sensor;
A moving part that is attached to a linear part of the optical fiber strain sensor at a predetermined distance from the fixed part, and that is composed of a sucked part at least partially made of a magnetic material;
There is provided a magnetic drive detection device characterized by comprising:

  With this configuration, when a magnetic force acts on the attracted portion of the moving portion and is pulled, the optical fiber strain sensor extends, and the wavelength of light reflected there changes. Based on this change in wavelength, it can be determined whether or not the moving unit is driven by magnetism.

The moving portion includes a moving plate extending from one end portion on the fixed portion side to the other end portion on the opposite side, and a suction surface fixed to the other end portion of the moving plate and extending in a direction orthogonal to the moving plate. Having a suction part made of a magnetic material,
The casing preferably has an opening that exposes the suction surface.

  With this configuration, the influence of the magnetic force from the outside can be effectively exerted on the moving plate via the suction portion, and the optical fiber strain sensor can be appropriately extended.

  According to the present invention, since the plurality of motion detection members are connected in series by the optical fiber, the laying work can be minimized. Therefore, the facility cost can be greatly reduced.

  Further, since the optical fiber strain sensor is fixed to the sensor mounting portion with a certain tension applied, there is no variation in sensitivity among the motion detection members. Moreover, since the optical fiber strain sensor is fixed to the plate-shaped sensor mounting portion and the sensor mounting portion is elastically deformed in the thickness direction, the displacement of the sensor mounting portion can be reduced even if the deformation amount of the optical fiber strain sensor is small. Can be bigger.

It is a schematic explanatory drawing of the door opening / closing detection system which concerns on this embodiment. It is a fragmentary perspective view which shows an example of the door shown in FIG. It is a perspective view of the detection part and to-be-detected part which concern on 1st Embodiment employ | adopted as the door of FIG. It is a disassembled perspective view of the to-be-detected part of FIG. It is a disassembled perspective view of the detection part of FIG. It is a top view which shows the state which open | released the 2nd cover of the detection part of FIG. 3A and 3B show a tube mounting portion of the detection unit of FIG. 3, in which FIG. 3A is a partial perspective view of the first cover viewed from the lower side, and FIG. (A) is a perspective view which shows the attachment plate of the detection part of FIG. 3, (b) is a perspective view which shows the state which elastically deformed in the plate | board thickness direction from the state shown to (a). It is a top view which shows the deformation | transformation state of the attachment plate of FIG. It is a perspective view of a detecting part and a detected part concerning other embodiments. FIG. 10 is a perspective view showing a state where the first cover of the detection unit shown in FIG. 9 is opened. It is a perspective view of the detection part and to-be-detected part which concern on 2nd Embodiment employ | adopted as the door of FIG. It is a disassembled perspective view of the to-be-detected part of FIG. It is a disassembled perspective view of the detection part of FIG. It is a perspective view which shows the state which open | released the 2nd cover of the detection part of FIG. It is a perspective view of a detecting part and a detected part concerning other embodiments. It is the elements on larger scale which looked at the relay piece part of FIG. 15 from the different angle. It is a partial exploded perspective view which shows the state which employ | adopted the detector which concerns on this embodiment for the water level meter. It is a disassembled perspective view of the float part of FIG.

  Embodiments according to the present invention will be described below with reference to the accompanying drawings. In addition, the following description is only illustrations essentially and does not intend restrict | limiting this invention, its application thing, or its use.

(First embodiment)
FIG. 1 is a schematic explanatory diagram of a door opening / closing detection system according to the present embodiment. Here, a door open / close detection system for detecting open / close states of various doors such as a plurality of fire doors and watertight doors provided in the power plant is shown. As shown in FIG. 2, each door 1 is provided with a detected portion 2, and a detection portion 3 is provided on the frame body side to which the door 1 is attached. FIG. 3 shows an enlarged perspective view of only the detected portion 2 and the detecting portion 3.

  FIG. 4 is an exploded perspective view showing an example of the detected part 2. The detected portion 2 is obtained by housing a permanent magnet 5 in a first casing 4. The first casing 4 includes a first case body 6 and a first cover 7 made of a synthetic resin material (for example, super engineering plastic).

  The 1st case main body 6 consists of the magnet accommodating part 8 and the extension part 9 extended from the both sides. The magnet accommodating portion 8 is formed with a concave portion 10 having a substantially rectangular shape in plan view that opens upward. The inside of the recess 10 is divided into three by a partition wall 11 in the longitudinal direction in which the extending portion 9 extends. A cylindrical portion 12 having a screwing hole 12a is formed in the center of both side recesses 10a. On the inner surface at one end of the central recess 10b, protrusions 10c extending in two rows in the vertical direction are formed. The permanent magnet 5 is accommodated in the central recess 10b. The permanent magnet 5 has a rectangular parallelepiped shape, and is magnetized so that one end thereof is an N pole and the other end is an S pole. The permanent magnet 5 is accommodated in the central recess 10b of the first casing 4 in a sideways state. There is no gap between the permanent magnet 5 and the central recess 10b other than the gap formed by the protrusion 10c on the inner surface on one end side. For this reason, the accommodation state of the permanent magnet is stable. In addition, the permanent magnet 5 can be easily inserted and removed using the gap formed by the protrusion 10c. When the permanent magnet 5 is inserted into the central recess 10b, the first case body 6 has one side 6a side as the N pole and the other side face 6b as the S pole (the N pole and the S pole are on either side). It does n’t matter if it ’s going to be). The extending portion 9 is formed with a recessed portion 9a that is recessed throughout the entire surface except for the upper edge portion. A through hole 9b is formed at the center of the recess 9a. By using screws or the like, the first case body 6 can be fixed at an arbitrary position via the through holes 9b.

  The first cover 7 has a plate shape having the same plane size as the upper surface of the magnet housing portion 8, and covers the upper surface to close the recess 10. Conical through holes 7 a are formed at both ends of the upper surface of the first cover 7. The countersunk screws 7 b are screwed into the screw holes 12 a of the magnet housing portion 8 through the through holes 7 a so that the first cover 7 can be fixed to the first case body 6. On the upper surface of the first cover 7, a concave triangular symbol portion 7 c is formed to indicate one magnetic pole direction of the permanent magnet 5 accommodated in the central concave portion 10 b of the first case body 6.

  FIG. 5 is an exploded perspective view showing an example of the detection unit 3. The detection unit 3 includes a sensor unit 14 accommodated in a second casing 13. The second casing 13 includes a second case body 15 and a second cover 16 made of a synthetic resin material (for example, super engineering plastic).

  The second case main body 15 has a substantially rectangular shape in plan view, and two extended portions 15a are formed on the outer surfaces of both ends. Each extending portion 15a has an edge projecting upward in the drawing and an inner portion serving as a recess 15b. A through hole 15c (see FIG. 6) is formed in the bottom surface of each recess 15b. The through hole 15c is used for fixing the detection unit 3 to a wall or the like with screws. The second case main body 15 has a tube attachment portion 19 formed at the center of one side wall 15d extending in the longitudinal direction (X direction in the figure). The second case body 15 is formed with cylindrical screwing portions 18 at the four corners of the recess 17 surrounded by the side walls and at two locations on both sides of the tube mounting portion 19.

  As shown in FIG. 7B, the tube attachment portion 19 includes a plate member 20 that is attached to a recess portion 19a formed in the center portion of the side wall 15d. A pair of first groove portions 19b is formed on the upper surface of the side wall 15d constituting the recess portion 19a. A pair of second groove portions 19d are formed in the wall portion 19c away from the inside. The plate member 20 is formed with a pair of through holes 20a through which an outer tube 34 described later is inserted. The 1st groove part 19b comprises the through-hole which hold | maintains the exterior tube 34 with the 3rd groove part 16c of the 2nd cover 16 mentioned later. The second groove portion 19 d forms a through hole that holds the optical fiber 34 extending from the outer tube 34 with the fourth groove portion 16 d of the second cover 16.

  The second case main body 15 is formed with a screw base 21 protruding from the bottom surface of the recess 17 at a predetermined interval along the inner surface of the other side wall 15e extending in the longitudinal direction (X direction in the drawing). The screw fixing base 21 is reinforced by ribs 22 extending from the inner surface and the bottom surface of the side wall. A mounting plate 23 is screwed to the screw mount 21.

  The mounting plate 23 is a plate made of a spring material. As shown in FIG. 8, one end side of the mounting plate 23 is cut and raised at a substantially right angle from the plate body 24, and the tip side thereof is further bent at a substantially right angle. As a result, the contact piece 25 protruding from one end of the mounting plate 23, the narrow arm portion 26 rising from both sides thereof, and the suctioned piece 27 on the tip end side are formed. An adjustment screw 28 attached to the second cover 16 described later can be brought into contact with the contact piece 25. The attracted piece 27 faces the inner surface of the second cover 16 described later in parallel and can be attracted by the permanent magnet 5.

  In the mounting plate 23, openings 23a are formed at two locations on the center line that is divided into two in the width direction. An optical fiber 32 is arranged along the center line on one surface (the lower surface in FIG. 6) of the mounting plate 23, and an optical fiber strain sensor 33 (FBG element) described later is positioned between the openings 23a. Yes. The epoxy resin applied to one surface of the mounting plate 23 is solidified in a state of entering the other surface through which the optical fiber 32 is disposed through the opening 23 a, and the optical fiber 32 is integrated with the mounting plate 23. Has been. In this state, a certain tensile force is acting on the optical fiber 32. The lower surface of the mounting plate 23 is protected together with the optical fiber 32 by a resin coating (not shown).

  On the other end side of the mounting plate 23, a mounting piece 29 is formed by bending one side edge. Through holes 29 a are formed at two locations in the attachment piece 29 and are screwed to the second case body 15.

  A plurality of cable guides 30 protruding from the bottom surface of the recess 17 are formed in the second case body 15. Each cable guide 30 is composed of an arc-shaped standing wall. A presser piece 31 is screwed to some cable guides 30. The presser piece 31 protrudes from the upper end of each cable guide 30 to the curved outer surface side, and the distal end portion thereof is further bent toward the bottom surface side of the recess 17. By screwing the presser piece 31 with the optical fiber 32 along the curved outer surface of the cable guide 30, an upward displacement of the optical fiber 32 is prevented. The radius of curvature of the curved outer surface of each cable guide 30 is set in a range where the bending loss in the guiding optical fiber 32 can be ignored.

  A case where the optical fiber 32 is arranged in the second case body 15 using the cable guide 30 will be described with reference to FIG.

  First, the mounting plate 23 integrated with the optical fiber 32 is screwed to the screwing portion 18 and attached to the second case main body 15. The optical fiber 32 extending from one end side of the mounting plate 23 is disposed along the curved outer surfaces of the first cable guide 30a and the second cable guide 30b located on the outer diameter side of the right half. And after arrange | positioning along the curved outer surface of the 3rd cable guide 30c, the 4th cable guide 30d, and the 5th cable guide 30e which are located in the inner diameter side of the left half, it is right side via the 6th cable guide 30f of the center part right side. Guide to the outer tube 34a. On the other hand, the optical fiber 32 extending from the other end side of the mounting plate 23 is disposed along the curved outer surfaces of the seventh cable guide 30g and the eighth cable guide 30h located on the outer diameter side of the left half. And after arrange | positioning along the 9th cable guide 30i located in the inner diameter side of the right half, the 10th cable guide 30j, and the 11th cable guide 30k, the left outer tube is passed through the twelfth cable guide 30l on the left side of the center. Lead to 34b.

  In this manner, by arranging the optical fiber 32 in the second casing 13 in an extra manner, when the connection work with the connector fails, the extra optical fiber 32 that has been arranged is pulled out and used. Can do.

  The second cover 16 is made of a plate material having a rectangular shape in plan view, and has through holes 16a formed at two locations along the four corners and one short side. The countersunk screws 12b are screwed into the screw fixing portions 18 of the second case main body 15 through these through holes 16a, and the second cover 16 is fixed to the second case main body 15. As shown in FIG. 7A, a recess 16b is formed in the side surface of the second cover 16, and there is a third groove 16c that forms a through-hole with the first groove 19b of the tube mounting portion 19. A fourth groove portion 16d is formed.

  The sensor unit 14 includes an optical fiber strain sensor 33 in the middle of the optical fiber 32 (here, OS3110, 3120 manufactured by MICRON OPTICS is used), and a mounting plate 23 to which both sides of the optical fiber strain sensor 33 are attached.

  The optical fiber 32 is obtained by coating the periphery of a core wire (core) of the optical fiber 32 with a sheath. The optical fiber 32 is covered with an outer tube 34 from the outside of the second casing 13 to a portion held by the tube mounting portion 19.

  The optical fiber strain sensor 33 is a fiber Bragg grating (FBG) element. A diffraction grating is engraved in the core of the optical fiber 32 at a predetermined interval in the longitudinal direction, and only a laser beam having a specific wavelength is obtained. It is reflected and transmits laser light of other wavelengths. Further, when the optical strain sensor itself extends, the interval between the diffraction gratings changes, and the wavelength of the reflected laser light also changes with the change.

  The detectors 3 attached corresponding to the doors 1 are connected in series by optical fibers 32 via connectors (not shown). That is, a connector is connected to each end of the optical fiber 32 that is led out from each detection unit 3 and covered with the outer tube 34. On the other hand, the optical fiber 32 laid between the doors 1 is also covered with an outer tube 34, and a connector is connected to the end. And the optical path between the optical fibers 32 is connected by connecting connectors. In FIG. 1, optical fibers 32 connected in series are provided in eight rows.

  As shown in FIG. 1, both ends of the optical fibers 32 connected in series are connected to a door monitoring unit 41, respectively. The door monitoring unit 41 includes an optical switch 42, an optical sensor monitoring device 43, a switching hub 44, an alarm hand link server 45, an information browsing terminal 46, and the like.

  The optical switch 42 has 16 channels and is connected to both ends of eight rows of optical fibers 32 connected in series. In the optical switch 42, the switch is automatically switched, and the laser light from the optical sensor monitoring device 43 is output to the detection unit 3 disposed facing the detected unit 2 of each door 1.

  The optical sensor monitoring device 43 transmits laser light having a plurality of predetermined wavelengths and receives the laser light (reflected light) reflected by each detection unit 3. In each detector 3, the wavelength of laser light that can be reflected for each optical fiber strain sensor 33 is set. The optical sensor monitoring device 43 sequentially outputs light of a wavelength that can be reflected by each optical fiber strain sensor 33, and the target detector 3 operates normally by receiving the light of that wavelength. It is determined that the door 1 is in an open state. Further, the optical sensor monitoring device 43 determines that the door 1 is in a closed state and the optical fiber strain sensor 33 is deformed by a pulling force based on a change in the wavelength of the reflected light. In these cases, it is preferable to correct the deformation amount of the optical fiber strain sensor 33 accompanying the temperature change. Further, in the optical sensor monitoring device 43, it is determined that a certain detection unit 3 has failed based on the absence of the input of the previous reflected light from the detector 3.

The switching hub 44 receives a signal from the optical sensor monitoring device 43 and outputs a determination result in the optical sensor monitoring device 43 to the alarm handling server 45.
The alarm handling server 45 transmits information corresponding to the information browsing terminal 46 based on the input signal from the optical sensor monitoring device 43.
The information browsing terminal 46 displays information transmitted from the optical sensor monitoring device 43 via the alarm handling server 45.

  The door opening / closing detection system configured as described above is laid in a factory as follows, for example.

  The detected portion 2 is fixed to the upper end portion of the door 1 with screws. That is, positioning is performed so that one of the polarities of the permanent magnet 5 accommodated in the detected part 2 faces the frame body side. On the other hand, on the frame body side, the detection unit 3 is fixed with screws so that the contact piece 25 can be attracted by the permanent magnet 5 of the detected unit 2. As a result, when the door 1 is closed, the magnetic pole surface of the permanent magnet 5 of the detected portion 2 and the attracted surface 27a of the attracted portion 27 of the detecting portion 3 face each other, and this attracted surface 27a is attracted. As a result, the mounting plate 23 is elastically deformed.

  Further, the optical fiber 32 is laid in parallel with the fixing of the detected portion 2 to the door 1. The laid optical fiber 32 and the optical fiber 32 extending from each detector 3 are connected by connectors. In this case, the attaching operation of the detected portion 2 to each door 1, the attaching operation of the detecting portion 3 to the frame side, and the laying operation of the optical fiber 32 can be performed individually. At this time, the detection units 3 are connected in series by the optical fiber 32. Both ends of the optical fibers 32 connected in series are connected to the optical switch 42 of the door monitoring unit 41.

  According to the door opening / closing detection system having the above-described configuration, it is possible to simply perform the laying operation by simply fixing the detection unit 3 and the detected portion 2 with screws, laying the optical fiber 32, and connecting the connectors. The optical fibers 32 need not be individually connected to the detection units 3 provided corresponding to the plurality of doors 1 but only connected in series. For this reason, compared with the case where it connects individually, installation cost can be reduced significantly.

  Next, the operation of the door opening / closing detection system configured as described above will be described.

  Laser light is output from the optical sensor monitoring device 43 of the door monitoring unit 41 and transmitted to the optical fiber strain sensor 33 of the detection unit 3 installed in the door 1 through the optical fiber 32 by the optical switch 42. In the optical fiber strain sensor 33 installed in each door, the wavelength of the laser beam that can be reflected is set to a different value. Therefore, the wavelength of the laser beam to be transmitted is sequentially changed to one corresponding to each optical fiber strain sensor 33. Each door 1 is a fire door and is open in a normal state. For this reason, only a constant tension as an initial state is applied to each optical fiber strain sensor 33, and only the laser light having the wavelength set first is sequentially reflected. In the door monitoring unit 41, the optical sensor monitoring device 43 determines which light is reflected from the detection unit 3 corresponding to which door 1. Then, the determination result is transmitted from the optical sensor monitoring device 43 to the alarm handling server 45. The alarm handling server 45 transmits the determination result to each information browsing terminal 46. Each information browsing terminal 46 displays the contents on the monitor.

  When the door 1 is closed, the magnetic pole surface of the permanent magnet 5 of the detected portion 2 provided on the door side faces the attracted surface 27a of the attracted portion 27 of the detecting portion 3 provided on the frame side. As a result, the attracted portion 27 is pulled by the permanent magnet 5, the mounting plate 23 is elastically deformed, and the optical fiber strain sensor 33 is extended. As described above, the attachment plate 23 has the suctioned portion 27 formed on one end side, and the attachment piece 29 on the other end side is screwed to the second case body 15. Therefore, when the mounting plate 23 is elastically deformed in the thickness direction, the optical fiber strain sensor 33 disposed on the outer surface and fixed at both ends is extended. Although the allowable extension amount of the optical fiber strain sensor 33 is small, it can be converted into an elastic deformation amount X in the thickness direction as shown in FIG. 9 by being attached to one side of the attachment plate 23. That is, the deformation amount can be increased by using the mounting plate 23 as compared with the case where the optical fiber strain sensor 33 is directly pulled and extended. Therefore, the operation state on the detection unit 3 side due to the magnetic force of the permanent magnet 5 can be made clear and the occurrence of malfunction can be suppressed.

  When the optical fiber strain sensor 33 extends, the wavelength of the reflected laser light changes, so that the optical sensor monitoring device 43 of the door monitoring unit 41 determines that the door 1 is closed based on the change in the wavelength. The optical sensor monitoring device 43 transmits a signal (close signal) indicating that the door 1 is closed to the alarm handling server 45. The alarm handling server 45 transmits a closing signal to each information browsing terminal 46 and displays that on the monitor. Thereby, the operator can grasp | ascertain the open / closed state of all the doors 1 at a glance.

  When the laser light is not reflected due to the optical fiber 32 being disconnected in the middle or the detection unit 3 being damaged, the detection unit 3 from which reflected light cannot be obtained is specified. In this case, laser light is transmitted from the other end of the optical fiber 32. Then, similarly to the above, the wavelength of the laser beam to be transmitted is sequentially changed to one corresponding to each optical fiber strain sensor 33. As a result, if the reflected light is obtained from the detection unit 3 specified that the reflected light cannot be obtained, it can be determined that the detection unit 3 has not failed and the optical fiber 32 is disconnected. Conversely, if no reflected light is obtained, it can be determined that there is a high possibility that the detection unit 3 has failed.

  Thus, in the said embodiment, the open / closed state of the door 1 can be detected based on the reflected light from each detection part 3 with respect to each of the optical fibers 32 connected in series. For this reason, it is not necessary to lay the optical fiber 32 individually for each detection unit 3, and can be installed at low cost. In each detector 3, the wavelength of light that can be reflected is determined, and it can be determined whether or not the optical fiber strain sensor 33 is driven by extending. In addition, the optical sensor monitoring device 43 can perform batch management.

  In the first embodiment, the detection unit 3 is configured to operate when the permanent magnet 5 faces the side surface (the lower surface one end side in FIG. 3) of the second casing 13, but when the detection unit 3 faces the upper surface. It can also be configured to operate.

  For example, the basic configuration of the detection unit 3 shown in FIGS. 10 and 11 is the same as that of the first embodiment, so that the corresponding parts are denoted by the same reference numerals and the description thereof is omitted. Only the differences are described.

  That is, the second case main body 15 includes a pair of screw fixing bases 21 extending from the inner surface and the bottom surface of one side wall extending in the longitudinal direction (X direction in the drawing), and a misalignment prevention piece 51 is provided therebetween. It is extended. The misalignment prevention piece 51 includes a thin plate portion 51a and a columnar portion 51b formed at the tip edge thereof. A mounting member 52 is screwed to the screw base 21.

  The mounting member 52 is formed by molding a synthetic resin material, and is screwed to the screwing base 21 of the second casing 13 and is screwed to a mounting plate 23 in which optical fibers are integrated in advance. The mounting member 52 can be positioned by inserting a misalignment prevention piece 51 through a slit (not shown). In this state, the attachment member 52 may be screwed to the screw fixing base 21.

  In this manner, in the state where the attachment member 52 is screwed to the second casing 13 and the attachment plate 23 is disposed, the suction target piece 27 faces the second cover 16.

  In the second cover 16, a recessed portion 53 is formed in a portion facing the contact piece 25 and the suctioned piece 27 of the built-in mounting plate 23 in a state of being attached to the second case body 15. A cylindrical projection 54 is formed on the bottom surface of the recess 53, and an adjustment screw 55 is screwed into the screw hole at the center. By changing the screwing position of the adjusting screw 55 with respect to the screw hole, the protruding dimension of the adjusting screw 55 from the protrusion 54 can be adjusted. The contact piece 25 of the mounting plate 23 that has been sucked and elastically deformed contacts the tip of the adjustment screw 55. That is, the elastic deformation amount of the mounting plate 23 can be adjusted by adjusting the projecting dimension of the adjusting screw 55.

  According to the combination of the detected portion 2 and the detecting portion 3 having the above-described configuration, even if there is almost no gap between the door 1 and the ceiling surface 56, the detected portion 2 attached to the upper end portion of the door 1 It can be detected by the detection unit 3 attached to the ceiling surface 56. That is, the detection unit 3 may be screwed to the ceiling surface 56 and the suction target piece 27 of the mounting plate 23 may be directed downward.

(Second Embodiment)
FIG. 12 shows the detected unit 102 and the detecting unit 103 according to the second embodiment.
As shown in FIG. 13, the detected portion 102 has a permanent magnet 105 accommodated in a first casing 104. The first casing 104 includes a first case body 106 and a first cover 107 made of a synthetic resin material (for example, super engineering plastic).

  The first case body 106 has a recess 108 formed on the top surface, and the bottom surface of the first case body 106 is a semicircular surface along the outer surface shape of the permanent magnet 105. In addition, extending portions 109 are formed from both end surfaces of the first case main body 106, respectively. A stepped hole 110 is formed in each extending portion 109 and is used for fixing the detected portion 102 to the door 1 with screws. The permanent magnet 105 has a cylindrical shape, and is magnetized with an N pole on one end side and an S pole on the other end side. The permanent magnet 105 is accommodated in the accommodating portion 111 of the first casing 104 in a sideways state. Therefore, one side surface of the first case body 106 is an N pole, and the other side surface is an S pole (regardless of which side the N pole and the S pole are).

  The first cover 107 is a plate-like body having a substantially rectangular shape in plan view, and tapered holes 107a whose inner diameters gradually increase toward the upper surface are formed on both ends. A flat head screw 112 is inserted from above through the taper hole 107 a and screwed into the female screw hole of the first case body 106, so that the first cover 107 can be fixed to the first case body 106.

  FIG. 14 is an exploded perspective view showing an example of the detection unit 103. The detection unit 103 has a sensor unit 114 accommodated in a second casing 113.

  The second casing 113 includes a second case body 115 and a second cover 116 made of a synthetic resin material.

  The second case main body 115 has a substantially rectangular shape in plan view, and two extending portions 115a are formed on both side surfaces, and stepped holes 115b are respectively formed there. The stepped hole 115b is used to fix the detection unit 103 to the wall with screws. The second case main body 115 is formed with cylindrical screwing portions 118 at the four corners of the recess 117 surrounded by the side walls and at two locations near the notch 115c. The second case body 115 is formed with a tube attachment portion 119, a sensor fixing portion 120, a sensor support portion 121, and a plate support portion 122 in this order along one side wall extending in the longitudinal direction (X direction in the drawing). Has been. Arc-shaped first cable guide 123 and second cable guide 124 are formed on the side portions of sensor fixing portion 120 and sensor support portion 121, respectively.

  The second cover 116 has bosses 116c (see FIG. 15) formed at three positions on the lower surface. These bosses 116 c regulate the upward movement along three upper surfaces of a moving plate 136 described later in a state where the second cover 116 is fixed to the second case main body 115 with screws.

  The tube mounting portion 119 is formed by forming arc-shaped notches 125a for holding an outer tube 137, which will be described later, at two opposing positions of the support wall 125 arranged at a predetermined interval. Semicircular cutouts 115c and 116a (see FIG. 15) are formed on the side walls of the second case main body 115 and the second cover 116 at positions corresponding to the cutouts 125a of the tube mounting portion 119, respectively. And constitutes a through-hole through which the outer tube 137 can be inserted.

  The sensor fixing portion 120 is provided with cylindrical screwing portions 126 in two rows along the longitudinal direction of the second case main body 115 and bosses 127 arranged on both sides thereof. The boss 127 protrudes from the screwing portion 126. When the fixing plate 135 of the sensor unit 114 (described later) is screwed to the screwing portion 118, the boss 127 comes into contact with the lower surface of the fixing plate 135 with respect to the bottom surface of the recess 117. Are positioned in parallel.

  The sensor support portion 121 includes a side wall portion 128 arranged in parallel and a partition wall portion 129 that divides the side wall portion 128 at equal intervals in the longitudinal direction. The side wall portions 128 have a larger projecting dimension from the bottom surface of the recess 117 than the partition wall portion 129, and play a role of guiding a moving plate 136 described later.

  The plate support part 122 is composed of three rows of protrusions extending in the X direction. The central ridge is a first support portion 130 that supports a center position of a moving plate 136 described later, and the ridges on both sides are second support portions 131 that support both side portions thereof. The first support part 130 extends closer to the sensor support part 121 than the second support part 131. The second support 131 joins the side wall, and a notch 115d is formed there.

  The first cable guide 123 includes first to fourth auxiliary guide walls 123a to 123d. The first auxiliary guide wall 123a is curved so as to gradually move away from the sensor fixing portion 120 toward the side of the second case main body 115. The optical fiber 132 can be guided in a substantially circular shape by the second to fourth auxiliary guide walls 123b to 123d. The fourth auxiliary guide wall 123d is used when the optical fiber 132 is wound twice together with the second and third auxiliary guide walls 123b and 123c. Projections 123e are formed on the upper and lower sides of the auxiliary guide walls 123a to 123d, respectively. The upper protrusion 123e restricts the upward movement of the optical fiber 132.

  The second cable guide 124 includes fifth to seventh auxiliary guide walls 124a to 124c, which can guide the optical fiber 132 in a substantially circular shape. Similarly to the first cable guide 123, protrusions 124d are formed above and below the auxiliary guide walls 124a to 124c, respectively, to restrict the upward movement of the optical fiber 132.

  In addition, the curvature radius of each curved surface of the 1st cable guide 123 and the 2nd cable guide 124 is set so that the bending loss may not generate | occur | produce in the optical fiber 132 to guide.

  The second cover 116 is made of a plate material having a rectangular shape in plan view, and has through holes 116b formed at two locations along four corners and one short side. The countersunk screws 112 are screwed into the screw fixing portions 118 of the second case main body 115 through the through holes 116 b to fix the second cover 116 to the second case main body 115. Further, as described above, the semicircular cutout 116a is formed on the end surface of the second cover 116 at a position corresponding to each cutout 125a of the tube mounting portion 119. Further, bosses 116c (see FIG. 6) are formed at three locations on the lower surface of the second cover 116. These bosses 116 c regulate the upward movement along three upper surfaces of a moving plate 136 described later in a state where the second cover 116 is fixed to the second case main body 115 with screws.

  Since the sensor unit 114 has the same configuration as that of the first embodiment, the same reference numerals are given and description thereof is omitted.

  The fixed plate 135 is a plate-like body having a rectangular shape in plan view and made of a metal material (here, stainless steel is used). The fixing plate 135 has four positioning holes 135a positioned by the four bosses 127 formed in the recess 117 of the second case main body 115. The fixing plate 135 is formed with notches 135b from both side edges between the positioning holes 135a located on both sides. These notches 135b are used for screwing the fixing plate 135 to the second case body 115. On the upper surface of the fixing plate 135, projections 135c having a circular shape in a plan view are formed at two locations on the tube attachment portion side in the attachment state to the second case main body 115. The projection 135c can be positioned by bringing the end of the connection plate 133 of the optical fiber strain sensor 134 into contact therewith. In this positioning state, the connection plate 133 is fixed to the fixed plate 135 by spot welding or the like.

  Similar to the fixed plate 135, the moving plate 136 is a rectangular plate-like body made of a metal material (here, stainless steel is used) in a plan view, but has a longer dimension in the longitudinal direction than the fixed plate 135. Long holes 138 are formed on both sides of the moving plate 136, respectively. In each elongated hole 138, a side wall portion 128 of the sensor support portion 121 is disposed. The elongated hole 138 is longer than the side wall portion 128, and the moving plate 136 is movable on the sensor support portion 121 in the longitudinal direction. Two protrusions 136a similar to the fixed plate 135 are formed inside the long holes 138 so that the end portions of the moving plate 136 can be brought into contact with each other for positioning. In this positioning state, the connection plate 133 is fixed to the moving plate 136 by spot welding or the like. At one end of the moving plate 136, through holes 136b are formed at two places in the width direction. A suction target piece 139 made of a magnetic material is screwed to the end of the moving plate 136 using these through holes 136b.

  The suctioned piece 139 is made of a steel plate-like body, and at one end side, through holes 139a for screwing and fixing to the moving plate 136 are formed at two places in the width direction, and the other end side is bent at a substantially right angle. doing. The end surface of the bent portion is a surface to be attracted 140 and can be attracted by the permanent magnet 105 of the detection unit 103.

The to-be-detected part 102 and the detection part 103 which concern on the said 2nd Embodiment are laid in the door 1 and a frame similarly to the thing which concerns on the said 1st Embodiment.
That is, positioning is performed so that the polarity of one of the permanent magnets 105 accommodated in the detected portion 102 faces the frame body side. On the other hand, on the frame body side, the detection unit 103 is screwed and fixed so that the suction piece 139 can be attracted by the permanent magnet 105 of the detection unit 102. Thus, when the door 1 is closed, the magnetic pole surface of the permanent magnet 105 of the detected portion 102 and the attracted surface 140 of the attracted piece 139 of the detecting portion 103 face each other, and a tensile load acts on the optical fiber strain sensor 134. And slightly stretched. However, the extension amount at this time is within an allowable range that does not damage the optical fiber 132, and the distance between the magnetic pole surface of the permanent magnet 105 and the suction target surface 140 of the suction target piece 139 is set accurately. Can respond. On the contrary, when the door 1 is opened, the tensile load acting on the optical fiber strain sensor 134 disappears and the original shape is restored.
Note that the operation of the laying of the optical fiber 132 and the door opening / closing detection system is the same as that of the first embodiment, and thus the description thereof is omitted.

  In the second embodiment, the detection unit 3 is configured as shown in FIG. 14, but the design can be changed according to the installation location. For example, the detection unit 3 can be configured as follows.

  FIG. 16 shows the detected unit 2 and a part of the detecting unit 3 according to another embodiment. In the detected part 2 and the detecting part 3, the same components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted. Hereinafter, only differences will be described.

  That is, the detected portion 2 is different in that it is fixed to the bracket 150 with screws. In the bracket 150, an extending plate 150 b extends orthogonally from the front end edge of the mounting plate 150 a that is screwed to the door 1, and further, a mounted plate 150 c that extends perpendicularly from the front end edge to which the detection unit 103 is screwed extends. ing. The detection unit 103 is screwed to the mounted plate 150c and has a magnetic pole surface facing sideways.

  Further, the detection unit 103 includes a frame plate 151 along the lower surface periphery of the second case main body 115. As shown in FIG. 17, the frame body plate 151 is formed with a support portion 151 a that supports the relay piece 152 so that the relay piece 152 can be rotated by partly protruding sideways. The support portion 151a has a configuration in which both side portions of the protruding portion are bent at a right angle and faced at a predetermined interval. The relay piece 152 is rotatably supported by the support portion 151a around the support shafts 152a on both sides. A connection convex portion 153 is formed on a part of the relay piece 152 and is connected to a connection hole formed on the suction target surface 140 of the suction target piece 139 by press fitting or the like. A suction plate 154 made of a magnetic material is screwed to the other part of the relay piece 152. The attracted plate 154 is attracted by the opposing magnetic pole surfaces of the permanent magnet 105 of the detected portion 102. As a result, the relay piece 152 rotates about the support shaft 152a, pulls the suctioned piece 139 via the connection convex portion 153, and extends the optical fiber strain sensor 134.

  As described above, according to the configuration shown in FIG. 16, when there is not enough space for arranging the detection unit 103 in the upper part of the frame that opens and closes the door 1, the door 1 can be arranged on the side. However, the configuration is not limited to that shown in FIG. 16 depending on the place of arrangement, and can be freely changed. In short, the open / closed state of the door 1 may be detected by making the optical fiber strain sensor 134 extendable by applying a magnetic force.

  In the above embodiment, the magnetic drive detection device is used for opening / closing detection of the door 1, but it can also be used for other uses such as various position detections and switches.

  In various position detections, for example, it can be used as a water level gauge. In this case, the detected parts 2 and 102 may be integrated with a float that moves up and down according to the water level, and the detecting parts 3 and 103 may be installed for each water level to be measured. Of course, as each of the detection units 3 and 103, a configuration in which optical fibers 32 and 132 are connected in series as in the above-described embodiment is used.

  FIG. 18 shows a specific example of a water level gauge. This water level meter is composed of a detection unit 201 and a float device 202. As shown in FIG. 18, the float apparatus 202 includes an attachment portion 203 and a float portion 204. Since the detection unit 201 has the same configuration as that described in the above embodiment, the illustration and description of its internal configuration are omitted.

  The attachment portion 203 includes a flat plate portion 205 and a float accommodation portion 206 extending from the lower edge thereof. The flat plate portion 205 has the same planar shape as one surface of the detection unit 201 and is fixed to the wall or the like together with the detection unit 201 by screws or the like. The float housing portion 206 is formed by closing a recess formed by a bottom surface portion and three side portions surrounding both sides and a lower end with a lid 207. The lid 207 is screwed into screw holes formed on both side portions. A plurality of through holes are formed in the lower side surface portion. As a result, the float housing portion 206 is submerged by being located in water. In addition, a long hole 207a is formed in the lid 207 along the center line thereof so that the float part 204 described later can be easily moved and its position can be confirmed. In addition, you may make it provide a scale in the side edge part which comprises the long hole 207a.

  The float unit 204 corresponds to the detected units 2 and 102 of the above embodiment. As shown in FIG. 19, the float unit 204 includes a float main body 208 and a lid 209. In the float body 208, a first recess 210 and a second recess 211 are formed. A permanent magnet 212 is accommodated in the first recess 210. The permanent magnet 212 has a cylindrical shape, and both end portions are magnetized with different polarities, and a magnetic force from one magnetic pole acts on the upper end side of the float portion 204. Screw holes are formed on both sides of the first recess 210. A groove 208a is formed at the opening edge of the second recess 211 over the entire circumference. The lid 209 is formed with the conical through-hole 209a so that a countersunk screw (not shown) can be screwed into the screw hole. The lid 209 is formed with a protrusion (not shown) disposed in a groove 208a formed around the second recess 211. A packing is accommodated in the groove 208a or a liquid gasket is injected. When the lid 209 is attached to the float body 208, a closed space is formed in which the second recess 211 is covered with the lid 209 and sealed with a packing or a liquid gasket. Due to this sealed closed space, the float portion 204 floats in water. A mark such as an arrow indicating the water level may be formed on the front surface of the float body 208 at a position where it can be visually recognized from the long hole 207a formed in the float housing portion 206.

  The water level meter having the above-described configuration is installed as follows. That is, the float portion 204 is disposed in the recess of the attachment portion 203 and is closed with the lid 207. As a result, the float unit 204 is capable of reciprocating within the float storage unit 206. Further, the flat plate portion 205 of the attachment portion 203 is brought into contact with one surface of the detection portion 203, and both are screwed to a wall or the like. In this case, the detection unit 201 and the float device 202 may be laid at a place where the water level is to be detected. As a result, when the water level rises to the level to be detected, buoyancy acts on the float part 204 due to the rise in the water level, and the attracted pieces 27 and 139 of the detection part 201 are lifted to the permanent magnet 209 of the float part 204. It will be inhaled and operate. A plurality of detection units 201 may be installed at a desired water level detection position, and optical fibers extending from the detection units 201 may be connected in series with connectors. Thus, if the detection unit 201 detects that the water level has risen and the float unit 204 has been operated, the wavelength of the reflected light at the optical fiber strain sensors 33 and 134 changes. Therefore, it is possible to determine from which wavelength of the obtained reflected light the optical fiber strain sensors 33 and 134 of the detection unit 201 have been extended. That is, if the detection unit 201 and the water level detected by the detection unit 201 are stored in association with each other, the water level can be determined by specifying the detection unit 201.

  Further, when used as a switch, the detected portions 2 and 102 having the permanent magnets 5 and 105 extend the optical fiber strain sensors 34 and 134 of any of the detecting portions 3 and 103, thereby performing the corresponding processing. What should I do?

  The present invention can be used not only for detection of opening / closing of the door 1 but also for various position detections, switches, and the like.

DESCRIPTION OF SYMBOLS 1 ... Door 2 ... Detected part 3 ... Detection part 4 ... 1st casing 5 ... Permanent magnet 6 ... 1st case main body 7 ... 1st cover 7a ... Through-hole 7b ... Countersunk screw 7c ... Triangle symbol part 8 ... Magnet accommodating part DESCRIPTION OF SYMBOLS 9 ... Extension part 9a ... Concave part 9b ... Through-hole 10 ... Concave part 10a ... Both side recessed part 10b ... Central recessed part 10c ... Projection 11 ... Partition wall 12 ... Cylindrical part 12a ... Screwing hole 12b ... Countersunk screw 13 ... Second casing 14 ... sensor part 15 ... second case body 15a ... extension part 15b ... recess 15c ... through hole 15d ... side wall 16 ... second cover 16a ... through hole 16b ... depression part 16c ... third groove part 16d ... fourth groove part 17 ... recess Location 18 ... Screw fixing portion 19 ... Tube mounting portion 19a ... Depression portion 19b ... First groove portion 19c ... Wall portion 19d ... Second groove portion 20 ... Plate material 20a ... Through hole 21 ... Screw fixing base 22 ... Rib 23 ... Mounting plug Over preparative (sensor mounting portion, the operation portion)
23a ... Opening 24 ... Plate body 25 ... Abutting piece 26 ... Arm part 27 ... Suctioned piece (suctioned part)
27a ... Suction surface 28 ... Adjustment screw 29 ... Mounting piece 29a ... Through hole 30 ... Cable guide 31 ... Pressing piece 32 ... Optical fiber 33 ... Optical fiber strain sensor 34 ... Exterior tube 41 ... Door monitoring unit 42 ... Optical switch 43 ... Optical sensor monitoring device (light output member, wavelength detection member, motion determination member)
44 ... Switching hub 45 ... Alarm hand link server 46 ... Information browsing terminal 51 ... Position shift prevention piece 52 ... Mounting member 53 ... Recess 54 ... Projection 54a ... Screw hole 55 ... Adjustment screw 56 ... Ceiling surface 102 ... Detected part 103 ... Detecting part 104 ... first casing 105 ... permanent magnet 106 ... first case body 107 ... first cover 107a ... tapered hole 108 ... recessed part 109 ... extended part 110 ... stepped hole 111 ... accommodating part 112 ... counter screw 113 ... first 2 casing 114 ... sensor portion 115 ... second case main body 115a ... extended portion 115b ... stepped hole 115c ... notch 116 ... second cover 116a ... notch 116b ... through hole 116c ... boss 117 ... recess 118 ... screw fixing 119: Tube mounting part 120 ... Sensor fixing part 121 ... Sensor support part 122 ... Play G support part 123 ... 1st cable guide 124 ... 2nd cable guide 125 ... support wall 125a ... notch 126 ... screwing part 127 ... boss 128 ... side wall part 129 ... partition wall part 130 ... 1st support part 131 ... 2nd Support part 132 ... Optical fiber 133 ... Connection plate 134 ... Optical fiber strain sensor 135 ... Fixed plate 136 ... Moving plate 137 ... Exterior tube 138 ... Long hole 139 ... Suction piece (suction part)
DESCRIPTION OF SYMBOLS 140 ... Suction surface 150 ... Bracket 151 ... Frame body plate 152 ... Relay piece 153 ... Connection convex part 154 ... Suction plate 201 ... Detection part 202 ... Float apparatus 203 ... Mounting part 204 ... Float part 205 ... Flat plate part 206 ... Float Housing 207 ... Lid 207a ... Long hole 208 ... Float body 208a ... Groove 209 ... Lid 210 ... First recess 211 ... Second recess 212 ... Permanent magnet

Claims (10)

An optical fiber extending from the casing and containing an optical fiber strain sensor formed in the middle of the optical fiber in the casing and an operation unit for extending the optical fiber strain sensor based on a force acting from the outside. A plurality of motion detection members connected in series via
A light output member that outputs light to each motion detection member via the optical fiber;
A wavelength detection member that detects the wavelength of light output from the light output member and reflected by the optical fiber strain sensor of the motion detection member;
Based on the wavelength detected by the wavelength detection member, an operation determination member that determines whether or not the operation unit of the operation detection member has operated,
An operation detection system comprising: The motion detection member is attached to the frame body side to which the door is attached,
The motion detection system according to claim 1, wherein the door is attached with a drive member for operating the motion part of the motion detection member when the frame is closed. The operation part of the motion detection member is composed of a plate-like body made of a magnetic material, is elastically deformable in the thickness direction, one end is fixed to the casing, and the suctioned part is formed at the other end. And
The motion detection system according to claim 2, wherein the drive member includes a permanent magnet that generates a suction force by a magnetic force in the attracted portion. In the casing,
An optical fiber strain sensor formed in the middle of the optical fiber;
Both ends are fixed in a plate-like shape with the optical fiber strain sensor being given a constant tension on one surface, and elastically deformed in the plate thickness direction by an external force, and the one surface side is curved outward. A sensor mounting portion for extending the optical fiber strain sensor by:
An operation detecting member comprising:   5. The sensor mounting portion is made of a magnetic material, one end portion is fixed to the casing, and the other end portion is formed with a portion to be attracted by a permanent magnet disposed outside. The motion detection member according to 1.   The motion detection member according to claim 4, wherein the optical fiber strain sensor is attached to the sensor attachment portion in a state in which a preset tension is applied in an extending direction.   The motion detection member according to claim 4, wherein the casing is provided with a deformation amount adjustment portion that allows adjustment of an elastic deformation amount of the sensor mounting portion. The deformation amount adjusting unit includes a screw member capable of adjusting a projecting dimension to the inside by changing a screwing position to the casing,
The sensor mounting part is formed with a sucked part obtained by cutting and raising one end part, and a remaining contact part,
The motion detection member according to claim 7, wherein the tip of the screw member can be brought into contact with the contact portion by elastic deformation of the sensor mounting portion in a plate thickness direction. In the casing,
An optical fiber strain sensor having a linear portion at least in part;
A fixing portion attached to a linear portion of the optical fiber strain sensor;
A moving part that is attached to a linear part of the optical fiber strain sensor at a predetermined distance from the fixed part, and that is composed of a sucked part at least partially made of a magnetic material;
A magnetic drive detection device comprising: The moving portion includes a moving plate extending from one end portion on the fixed portion side to the other end portion on the opposite side, and a suction surface fixed to the other end portion of the moving plate and extending in a direction orthogonal to the moving plate. Having a suction part made of a magnetic material,
The magnetic drive detection device according to claim 9, wherein the casing has an opening that exposes the suction surface.

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