JP6530050B2 - Sensor unit - Google Patents

Description

  The present invention relates to a sensor unit having a structure suitable for monitoring and diagnosing the state (health) of various structures.

  In Japan, various structures called social infrastructure, such as roads, railways, bridges, tunnels, etc., were developed in a large amount, concentrated in the period of high economic growth. In recent years, the aging of these structures is rapidly advancing. In fact, there have also been accidents in which the ceiling of an old tunnel has fallen. Therefore, measures against these aging structures are being considered as a pressing issue in Japan.

  In order to properly maintain and manage an aging structure, it is important to check the state of the structure by inspection and to take measures such as repair and reinforcement at an appropriate time. The inspection is usually performed by a person periodically by visual inspection or the like, but if various sensors are used to constantly monitor and diagnose the state of the structure, the efficiency can be raised.

  For example, the technology disclosed in Japanese Patent Application Laid-Open No. 2000-186984 (Patent Document 1) proposes a method of providing an acceleration sensor on a bridge and detecting an abnormality of the bridge based on the acceleration of normal fine movement detected by the acceleration sensor. ing.

  Incidentally, the acceleration sensor can detect not only the vibration and the movement of the object but also the inclination (so it is also referred to as the "inclination sensor"), and to monitor and diagnose the state of the structure. When used, it is possible to grasp the change of the state as a structure not only from the movement of the target structure but also from the inclination.

JP 2000-186984 A

  When using an acceleration sensor for monitoring / diagnosis of the state of the structure, the acceleration sensor is provided in the structure in a state of being housed in a housing. Since the housing for containing the acceleration sensor is to be provided outdoors for a long period of time, and it is placed in an environment exposed to corrosive gases such as automobile exhaust gas, it has weatherability and corrosion resistance. Are preferred. Although the housing can be attached directly to the structure, it can also be attached through a mounting member such as a base. When a mounting member such as a base is used, it is preferable to make the member excellent in weather resistance and corrosion resistance as well as the housing.

  By the way, as an acceleration sensor, a three-axis acceleration sensor capable of measuring acceleration in three axial directions can be used. However, in the case of the three-axis acceleration sensor, for example, the vertical direction of the sensor is opposite between the case where the housing is attached to the ceiling side and the case where the housing is attached to the floor side. Since the output in the vertical direction is opposite, there is a possibility that analysis errors of measured values may occur.

  Therefore, for example, a mounting structure in which the upper surface side is the mounting surface and a mounting structure in which the lower surface is the mounting surface are provided in the housing, and a mounting structure in which the upper surface is the mounting surface It is possible to attach according to the attachment structure which makes attachment on the floor surface side, and makes the lower surface side the attachment side surface. In such a case, the vertical direction of the sensor can be aligned between the case where the housing is fixed to the ceiling surface and the case where the housing is fixed to the floor surface, and the output value can be used as it is.

  However, in the case where the housing is composed of the lid and the main body and the lid is fixed to the main body from the upper surface side, the upper surface side is used as the attachment side surface and attached to a mounting member such as a structure or base. If it does, it will become impossible to open a lid unless it removes a case from a member for attachment of a structure or a base etc.

  In view of the above-described circumstances, the present invention is a sensor unit that can be mounted as a mounting surface on both the upper surface side and the lower surface side, and can be opened and closed from both the upper surface side and the lower surface side. Intended to provide.

The present invention relates to a sensor unit including an acceleration sensor and a housing for housing the acceleration sensor, wherein the housing has a main body and a lid, and the housing is an object to which the housing is attached. Through holes for housing attachment through which bolts for attaching to the housing are inserted are respectively formed in the lid and the main body, and the housing closes the lid and the main body. bolt for the inserted state, and are and those closed through hole to be screwed are formed respectively on said body and said lid, and, mounted as a surface of the side the housing is attached to the upper surface When it is carried out, the bolt for attaching the case is not inserted into the case attaching through hole formed in the main body, but the case attaching through hole formed in the lid from the lower surface side of the lid. Is inserted into the hole Also, when the case is attached with the lower surface side as the attachment side, the bolt for attaching the case is not inserted into the case attachment through hole formed in the lid, and the bolt is not inserted. a sensor unit, characterized in der Rukoto those to be inserted into the housing mounting through holes formed in the body from the upper surface of the main body.

Further, this invention, when the housing is mounted as a surface for mounting the upper surface side, a bolt for the said as before Kifutatai body closed state, through a closure formed in the body is inserted from the hole in the lid through-hole formed in the lid, which is engaged and screw, also, the when the housing is mounted as surface mounting side lower surface side, the front Kifutatai the The bolt for fixing the main body in the closed state is inserted from the through hole for closing lid formed in the cover into the through hole for closing lid formed in the main body and is screwed. It is a sensor unit characterized by the above.

  Further, in the present invention, the bolt for closing the lid and the main body is a cover bolt provided with a head on the base end side of the shaft and a screw on the tip side. A through hole for lid provided in the lid and the main body is characterized in that a screw portion and a large diameter portion formed to have a diameter larger than that of the screw portion are formed. It is a sensor.

  Further, according to the present invention, the lid is connected to the main body by a hinge portion, and the lid through hole provided in the lid and the main body is continuous with the large diameter portion. It is an acceleration sensor characterized by having a space part extended and formed in the direction which intersects perpendicularly with the axis of rotation of the above-mentioned hinge part.

  In this invention, when the casing is attached with the upper surface side as the attachment side surface, the bolt for attaching the casing is inserted from the lower surface side of the lid into the casing attachment through hole formed in the lid. Also, a bolt for closing the lid and the main body is inserted into and screwed into the lid through hole formed in the lid from the lid through hole formed in the main body. It can be When the housing is mounted with the lower surface side as the mounting surface, the bolt for mounting the housing is inserted from the upper surface side of the main body into the housing mounting through hole formed in the main body, and the lid The bolt for closing the body and the main body is inserted from the through hole for closing lid formed in the cover into the through hole for closing lid formed in the main body and screwed together. Can.

  That is, when the housing is mounted with the upper surface side as the mounting surface, the bolt for closing the lid and the main body can be detached from the main body side, and the housing can be opened and closed from the main body side. When the housing is attached with the lower surface side as the mounting surface, the bolt for closing the lid and the main body can be detached from the lid side, and the housing is opened and closed from the lid side can do.

  Therefore, according to the present invention, it is possible to provide a sensor unit having a housing capable of mounting both the upper surface side and the lower surface side as the attachment side surface and opening and closing from both the upper surface side and the lower surface side. can do.

An example of embodiment of the sensor unit of this invention is shown, and it is a perspective view of the housing and mounting base which accommodate an acceleration sensor. FIG. 6 is a cross-sectional view of the case in a closed state, showing the same as above. FIG. 6A is a cross-sectional view of the case in the open state, showing the screw portion of the bolt being released to the space portion side. It is an explanatory view showing the direction of the up-and-down direction of the acceleration sensor in the state where the case was attached and the case was attached to the ceiling surface and the floor surface. It is a bottom view of the mounting surface side to the structure of a mounting base which shows the same as the above. The same as above is shown, (a) is a plan view of the fixing surface side of the housing of the mounting base, (b) is a side view, (c) is a sectional view taken along line A-A of (a) (D), (d) is a cross-sectional view taken along the line B-B (a grip portion is included) of (a). In (c) and (d), illustration of the silicone resin sheet is omitted. It is a perspective view which shows the same as the above and shows the case where it attaches to the support | pillar of a structure as an example of the usage condition of a sensor unit.

  An example of the embodiment of the sensor unit of the present invention will be described based on FIGS. 1 to 7.

  The sensor unit 1 is used to monitor and diagnose the state of various structures, and as shown in FIG. 1, the acceleration sensor 2 (FIG. 4) and the acceleration sensor 2 are housed in a sealed state. A housing 3 and a mounting base 4 to which the housing 3 is fixed and which is attached to the object to be measured are provided.

  In the sensor unit 1, the housing 3 has a lid 5 and a main body 6. In the housing 3, housing mounting through holes 8 and 9 into which bolts 7 for mounting and fixing the housing 3 to the mounting base 4 are inserted are formed in the lid 5 and the main body 6, respectively. Furthermore, a bolt 10 for fixing the lid 5 and the main body 6 in the closed state is inserted and closed lid through holes 11 and 12 are formed in the lid 3 and the main body 6, respectively. There is.

  Here, in the case of this embodiment, four housing attachment through holes 8 and 9 are provided in each of the lid 5 and the main body 6. Specifically, the mounting flanges 5b and 6b formed at two locations on each of the side edge portions of the lid 5 and the main body 6 on the short side are vertically penetrated. Thus, the bolt 7 can be inserted into the mounting through hole 8 on the lid 5 side from the lower surface side of the lid 5 (the lower surface side of the mounting flange 5 b), and the main body 6 side The bolt 7 can be inserted into the mounting through hole 9 from the upper surface side (upper surface side of the mounting flange 6 b portion) of the main body 6. Furthermore, in the case of the present embodiment, four lid through holes 11 and 12 are provided in each of the lid 5 and the main body 6. Specifically, the cover lid flanges 5a and 6a formed at the four corners of the lid 5 and the main body 6 are vertically penetrated. Thus, the bolt 10 can be inserted and screwed from any side of the closing lid through holes 11 and 12. The number, arrangement, and the like of the through holes 8 and 9 for lid attachment and the through holes 11 and 12 for closing can be appropriately changed.

  Then, when the sensor unit 1 is attached with the housing 3 on the upper surface side (upper surface side of the lid 5) as the attachment side, the bolt 7 for attaching and fixing the housing 3 to the attachment base 4 is the lid 5 The bolt 10 for inserting the case mounting through hole 8 on the lid 5 side from the lower surface side of the cover and for closing the cover 5 and the main body 6 is a closing through hole on the main body 6 side. It is inserted into and screwed into the through hole 11 for closing lid from the side 12 of the lid 5. On the other hand, when the housing 3 is attached with the lower surface side (the lower surface side of the main body 6) as the attachment surface, the bolt 7 for attaching the housing 3 is a through hole for housing attachment on the main body 6 side from the upper surface side of the main body 6. The bolt 10 is inserted into the cover 9 and is used to fix the lid 5 and the main body 6 in the closed state from the closing lid through hole 11 on the lid 5 side to the closing lid through hole 12 on the main body 6 side. It is inserted and screwed together.

  Thereby, the sensor unit 1 is a bolt 10 maintaining the lid 5 and the main body 6 in the closed state even when the case 3 is attached to the attachment base 4 with the upper surface side being the attachment side surface. Can be detached from the main body 6 side, and the housing 3 can be opened and closed from the main body 6 side. In addition, when the housing 3 is attached to the mounting base 4 with the lower surface side as the attachment side, the bolt 10 maintaining the lid 5 and the main body 6 in the closed state is also attached to the lid 5 side The housing 3 can be opened and closed from the lid 5 side.

  Therefore, according to the sensor unit 1, the housing 3 can be attached to the mounting base 4 with both the upper surface side and the lower surface side of the housing 3 as the mounting surface, and both the upper surface side and the lower surface side of the housing 3 And the housing 3 can be opened and closed.

  Further, the sensor unit 1 will be described in detail.

  As the acceleration sensor 2, a three-axis acceleration sensor capable of measuring acceleration in three axial directions can be used. In the case of the three-axis acceleration sensor, if the vertical direction of the sensor changes, the output in the vertical direction is reversed, which may cause an analysis error of the measured value. However, in the sensor unit 1, as described above, the housing 3 can be attached to the mounting base 4 with both the upper surface side and the lower surface side of the housing 3 as the attachment side surface, for example, as shown in FIG. The housing 3 attached to the ceiling surface R side by attaching the upper surface side of the housing 3 as the attachment side surface to the ceiling surface R side and attaching the lower surface side of the housing 3 as the attachment side surface to the floor surface F side Since the orientation of the acceleration sensor 2 in the vertical direction z and the orientation of the acceleration sensor 2 in the housing 3 mounted on the floor F side can be aligned in the same direction, the data values can be confused Processing can be done without it.

  Further, in the case of the present embodiment, as shown in FIGS. 2 and 3, the bolt 10 for fixing the lid 5 and the main body 6 in the closed state is provided on the base end side of the shaft portion 10 b (non-screwing portion). The cover bolt is provided with a head portion 10a and a screw portion 10c (screwing portion) on the tip end side, and the cover through holes 11 and 12 provided in the cover 5 and the main body 6 are screwed. The portions 11a and 12a (screwing portion) and the large diameter portions 11b and 12b (non-screwing portion) formed to have a diameter larger than them are formed. Thus, the housing 3 can be opened while preventing the bolt 10 from falling off.

  Furthermore, in the case of the present embodiment, in the case 3, the lid 5 and the main body 6 are connected by the hinge portion 13, and the lid 5 can be opened and closed with the axis of the hinge portion 13 as a pivot. However, as shown in FIG. 2 and FIG. 3, the closing lid through holes 11 and 12 provided in the lid 5 and the main body 6 are continued to the large diameter portions 11b and 12b, and a hinge portion is provided. Space portions 11 c and 12 c extending along a direction orthogonal to the pivot axis of 13 are formed. As a result, when the lid 5 is opened, the screw 10 on the hinge 13 side can be released to the space 11 c side, so that the lid 5 does not disturb the opening motion (see FIG. 3).

  Next, the mounting base 4 will be described in detail.

  In the sensor unit 1, the mounting base 4 is formed in a plate shape as shown in FIGS. 5 and 6, and has a fixing surface 4a to which the housing 3 is attached and fixed on the front surface side, The side has a mounting surface 4b attached to the structure. The fixed surface 4a is provided with a non-penetrating (bottomed) screw hole 4c in which the bolt 7 inserted into the through holes 8 and 9 for housing attachment of the housing 3 is screwed. The mounting surface 4b is provided with a magnet 14 which is adsorbed to the structure, but in the case of the present embodiment, it is provided in a state of being accommodated in a recess 4d recessed in the mounting surface 4b. As the magnet 14, a neodymium magnet, which is a strong permanent magnet, can be used. Further, in the case of the present embodiment, four magnets 14 are provided, and two magnets arranged side by side are arranged in upper and lower two stages, but the number and arrangement thereof can be appropriately changed.

  Then, as shown in FIG. 5, a silicone resin sheet 15 is provided to be attached to the mounting surface 4 b so as to seal the magnet 14 housed in the recess 4 d in a sealed manner (for convenience of illustration, Dot pattern is attached). The silicone resin sheet 15 is attached to the mounting surface 4b by an adhesive substance such as a seal or an adhesive.

  The silicon resin sheet 15 can protect the magnet 14 from the open air. In addition, it is possible to prevent the adsorption surface of the magnet 14 from sliding relative to the structure by frictional resistance.

  Therefore, according to the sensor unit 1, it is possible to prevent the corrosion while using the magnet 14 for attaching to the structure. In addition, it is possible to prevent positional deviation with the structure.

  Further, the mounting base 4 will be described.

  In the case of this embodiment, as shown in FIG. 6, the magnet 14 is fixed to the mounting base 4 by screws 16 screwed into non-penetrating (bottomed) screw holes 4 e formed on the mounting surface 4. It is done. That is, the magnet 14 can be prevented from being exposed to the outside air through the screw holes 4 e, and the magnet 14 can be protected from the outside air also by this screwing structure.

  Further, in the present embodiment, although the mounting base 4 is formed in a plate shape, as shown in FIG. 5 and FIG. 6, the notches 4 f formed along the length direction on both sides thereof. 4f is provided. These notches 4f, 4f can be grasped, and the mounting base 4 can be easily grasped, and its handling can be facilitated.

  Furthermore, as shown in FIG. 6, a center groove 4g is provided in the mounting base 4 as an example of a guide line along the direction of the measurement axis of the acceleration sensor 2 fixed in the housing 3 attached thereto. It is shown formed on the fixed surface 4a. Thereby, when attaching the mounting base 4 to the structure, the direction of the measurement axis of the acceleration sensor 2 can be easily aligned in the axial direction of the structure by attaching the center groove 4g along the axial direction of the structure. Can. In the case of the present embodiment, the center groove 4g is formed on the center line along the length direction of the mounting base 4. The housing 3 is fixed on the mounting base 4 such that the measurement axis in one of the planar directions of the three measurement axes measured by the acceleration sensor 2 is along the center line thereof, and the center groove 4g is structured If the mounting base 4 is attached to the structure so as to match the axial direction of the object, the measurement axis in any one of the planar directions of the acceleration sensor 2 will be along the axial direction of the structure.

  Finally, the usage of the sensor unit 1 of the present embodiment will be described.

  The sensor unit 1 can continuously monitor and diagnose the soundness of the structure as a structure by being attached to the structure, but a 3-axis acceleration sensor is used as the acceleration sensor 2. Then, it can be attached in various orientations depending on the form of the attachment position of the structure, for example, it can be attached horizontally to the horizontal part of the structure and vertically attached to the vertical part be able to.

  FIG. 7 shows the case where the sensor unit 1 is attached vertically to the support pillars P of a structure erected in the vertical direction. Specifically, as shown in the figure, when the sensor unit 1 is attached to the column P of a vertically erected structure, the sensor unit 1 is vertically oriented with its length direction along the axial direction of the column P It can be mounted in the direction.

  Here, as described above, the sensor unit 1 has the magnet 14 on the side of the mounting surface 4b, and the mounting position may be made of a material capable of adsorbing a magnet such as iron when mounting on a structure. For example, the attachment base 4 can be attracted to the surface of the support post P by the attraction force of the magnet 14 provided on the attachment surface 4 b side. For example, a post such as a road sign is usually made of iron, and the attachment base 4 can be adsorbed onto the surface by the adsorption force of the magnet 14. Further, the silicone resin sheet 15 is attached to the attachment surface 4 b so as to cover the magnet 14, and the frictional resistance of the silicone resin sheet 15 can prevent the attachment base 4 from sliding. It is possible to prevent the occurrence of misalignment. Furthermore, a center groove 4g is formed on the fixed surface 4a side, and by mounting the mounting base 4 so that the center groove 4g is along the axial direction of the support P, the direction of the measurement axis of the acceleration sensor 2 in the housing 3 Can be aligned in the axial direction of the support 20. In the case of the one shown in FIG. 7, two fastening belts 4h for fastening the mounting base 4 to the support P are mounted around the support P at the top and bottom, so that there is a positional deviation with the support P as well. It can be prevented from occurring, and it can be prevented from slipping down. The fastening belt 4 h can be made of, for example, metal or silicon.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said embodiment, A various change is possible within the range of the summary.

  For example, although the sensor unit 1 is an acceleration sensor unit using the acceleration sensor 2, it may be any other sensor unit as long as it monitors and diagnoses the state (soundness) of various structures instead. Good.

  Moreover, the sensor unit 1 (mounting base 4) may be attached not only to a structure but to another measuring object.

1: sensor unit 2: acceleration sensor 3: housing 4: mounting base 4a: fixing surface 4b: mounting surface 4c: screw hole 4d: recess 4e: screw hole 4f: notch 4g: center groove 4h: fastening belt 5 : Lid 5a: Flange for closing lid 5b: Flange for mounting 6: Main body 6a: Flange for closing lid 6b: Flange for mounting 7: Bolt (for housing attachment)
8, 9: housing mounting through hole 10: bolt (for closing lid) 10a: head 10b: shaft 10c: screw portion 11, 12: closing lid through hole 11a, 12a: screw portion 11b, 12b: large Diameter part 11c, 12c: Space part 13: Hinge part 14: Magnet 15: Silicon resin sheet 16: Screw R: Ceiling F: Floor P: Post

Claims (4)

In a sensor unit comprising an acceleration sensor and a housing for housing the acceleration sensor,
The housing has a main body and a lid,
Further, the housing is provided with a housing mounting through hole through which a bolt for mounting the housing to be mounted is inserted in the lid and the main body, respectively.
Furthermore, as the housing, a bolt for inserting the lid and the main body in a closed state is inserted, and a lid-covering through-hole to be screwed is formed in the lid and the main body, respectively. der is,
And, when the case is attached with the upper surface side as the attachment side surface, the bolt for attaching the case is not inserted into the case attachment through hole formed in the main body, and the lower surface of the lid is Through the through-hole for housing attachment formed in the lid from the side;
Further, when the case is attached with the lower surface side as the attachment side, the bolt for attaching the case is not inserted into the case attachment through hole formed in the lid, and the upper surface of the main body sensor unit, characterized in der Rukoto those to be inserted into formed from the side in the main body housing mounting through holes. When said housing is mounted as a surface for mounting the upper surface side, and said before and Kifutatai body bolt to the closed state, the lid from closing through-hole formed in the body It is inserted into the formed through hole for closing and screwed,
Further, when the housing is mounted as a surface of the side mounting the lower surface side, and said before and Kifutatai body bolts for fixing the closed state, the lid closing a through-hole formed in the lid The sensor unit according to claim 1, wherein the sensor unit is inserted into and screwed into a through hole for lid formed in the main body.   The bolt for closing the lid and the main body is a cover bolt provided with a head on the base end side of the shaft and a screw on the tip end, and the lid and the lid The through hole for closing lid provided in the main body is characterized in that a screw portion and a large diameter portion formed to have a diameter larger than that of the screw portion are formed. Sensor unit.   The lid is connected to the main body by a hinge portion, and the lid through hole provided in the lid and the main body is continued to the large diameter portion, and the hinge portion is pivoted. The sensor unit according to claim 3, wherein the sensor unit has a space formed extending in a direction orthogonal to the axis.

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