JP6559476B2 - Inspection device - Google Patents

Description

  The present invention relates to an inspection apparatus, and in particular, in a monitoring system for an infrastructure (social infrastructure), in place of an artificial inspection that circulates, isolates each monitoring target from the outside world and eliminates the influence of the outside world to acquire image information and the like. The present invention relates to an inspection apparatus capable of performing inspection.

  In recent years, the maintenance of the infrastructure has become a problem in view of the aging of the infrastructure made in the past, and for this reason, a monitoring system that monitors a deteriorated portion of the infrastructure has attracted attention. As a conventional infrastructure inspection method, an artificial inspection method is generally the mainstream, and visual inspection, hammering inspection, and the like have been used. Furthermore, as a monitoring system, there have been proposed a monitoring system by taking an image with a camera, a monitoring system for applying a shock and performing frequency analysis of the vibration.

  As an example of a related conventional monitoring system, there is a wireless camera network system described in Patent Document 1 below. This wireless camera network system is a system that can perform stable image monitoring over a long period of time outdoors or the like.

JP 2005-26832 A

  Artificial inspection methods such as visual inspection and hammering inspection have a limitation that only places where people can enter can be inspected. If you want to inspect the part in the back of the structure, it is necessary to perform a visual inspection after removing a part of the structure, and to return it to the original state after the inspection. take time. Furthermore, if there are multiple inspection points, the person must go around the inspection site. Therefore, the problem of poor inspection efficiency is raised with regard to the artificial inspection method.

  Also, in conventional infrastructure monitoring systems, when taking images with a camera, the inspection location is usually outdoors, so the influence of the environment, such as weather such as wind and rain, and the magnitude of lighting changes (direct sunlight, night), etc. Receive strongly. For example, the lighting is not stable, it is dark and cannot be photographed, or the lens or the object to be photographed is affected. For this reason, the conventional infrastructure monitoring system has a problem that a stable image or the like cannot be acquired.

  The above-described wireless camera network system disclosed in Patent Literature 1 can solve the first problem related to the artificial inspection method among the above two problems. However, the second problem that a stable image or the like cannot be acquired has a problem that it cannot be solved.

  In view of the above-described problems, the object of the present invention is used in an infrastructure monitoring system to eliminate the influence of weather such as sunlight and wind and rain, to acquire stable image information, etc., and to reduce inspection costs. An object of the present invention is to provide an inspection apparatus capable of increasing efficiency.

  In order to achieve the above object, an inspection apparatus according to the present invention is configured as follows.

A first inspection device (corresponding to claim 1) is attached so as to cover a monitoring target and has a double-wall structure that isolates the monitoring target from the outside, and the inside of the double-walled structure And current status information acquisition means for acquiring current status information from a monitoring target.

In the above inspection apparatus, since the monitoring target is isolated from the outside by a double-walled casing, the current status information acquisition unit arranged in the casing is configured to acquire the current status information of the monitoring target. As an inspection device for an infrastructure monitoring system, it is possible to eliminate the influence of external weather, and it is possible to acquire current information such as stable image information. Furthermore, according to this configuration, it is possible to completely block external influences by the double-walled housing. Workers do not need to make regular patrols, monitoring work is facilitated, and monitoring efficiency can be increased.

  The second inspection apparatus (corresponding to claim 2) is preferably characterized in that, in the above-described configuration, the casing has a sealed interior, and the current information acquisition unit is an image acquisition unit. The image acquisition means is a camera device as an example of a sensing device, and the camera device acquires image data relating to a monitoring target as current status information.

  In the third inspection apparatus (corresponding to claim 3), in the above-described configuration, the image acquisition unit is preferably an imaging apparatus, and further includes an illumination device and a transmission device inside the housing, and the illumination device includes an illumination device. The image relating to the monitoring target acquired by the imaging device is transmitted to an external management unit by the transmission device.

The fourth inspection unit (corresponding to claim 4), in the above configuration, preferably, be monitored, crack portions of the social infrastructure, social infrastructure stress visualized member provided at a predetermined position, or The bolt is characterized by a bolt having a top portion that changes color according to axial force.

  The sixth inspection apparatus (corresponding to claim 6) is preferably characterized in that, in the above configuration, quantitative measurement is performed based on an image relating to a monitoring target. Since it is possible to perform measurement based on image data rather than visual observation by a person, it is possible to quantitatively measure the state of the monitoring target by an arithmetic process on the image data.

A sixth inspection apparatus (corresponding to claim 6 ) is characterized in that, in the above-described configuration, preferably includes a determination unit that determines the status of the monitoring target based on the current state information acquired by the current state information acquisition unit. To do.

In the above configuration, the seventh inspection device (corresponding to claim 7 ) preferably transmits a signal related to the current state information acquired by the current state information acquisition unit to the outside, and the monitoring target is externally monitored based on the current state information. Judgment means for judging the situation is provided.

  According to the present invention, the monitoring target is isolated from the outside by the casing, and the current status information of the monitoring target is acquired by the current status information acquisition means such as a camera device arranged in the casing. It is possible to eliminate the influence of weather, etc., acquire stable image information, etc., eliminate the need for visual inspections that are regularly patroled by humans, facilitate monitoring work, and improve monitoring efficiency The effect is demonstrated.

It is sectional drawing which shows the structure of 1st Embodiment of the inspection apparatus which concerns on this invention. It is a block diagram of the inspection device concerning a 1st embodiment. It is a flowchart which shows the test | inspection operation | movement of the test | inspection apparatus which concerns on 1st Embodiment. It is sectional drawing which shows the structure of 2nd Embodiment of the inspection apparatus which concerns on this invention. It is sectional drawing which shows the structure of 3rd Embodiment of the inspection apparatus which concerns on this invention. It is sectional drawing which shows the structure of 4th Embodiment of the inspection apparatus which concerns on this invention.

  DESCRIPTION OF EMBODIMENTS Preferred embodiments (examples) of the present invention will be described below with reference to the accompanying drawings.

  A first embodiment of an inspection apparatus according to the present invention will be described with reference to FIGS. This inspection device is used in a monitoring system for monitoring the occurrence state or progress state of a deteriorated portion of a building (bridge, tunnel, building, general building, highway, etc.) that is an infrastructure (social infrastructure facility). . The inspection device is fixedly installed in the target area to be monitored, and performs fixed point monitoring or fixed point inspection at a required inspection timing. In FIG. 1, reference numeral 11 denotes a monitoring target, which is a crack that is highly likely to occur in an old structure 12 such as a bridge. An inspection device 13 is attached to the structure 12 so as to cover the monitoring target 11 in a sealed manner, for example. As means for attaching the inspection device 13 to the structure 12, any means such as fastening means (bolts and screws) or an adhesive can be used. In the present embodiment, the monitoring means of the inspection device 13 is an imaging device, and the camera device 14 is provided inside the housing 15 of the inspection device 13. An open portion is provided at one wall surface of the casing 15 in the form of a box-shaped container. The casing 15 of the inspection device 13 is attached to the outer surface of the structure 13 such that the open portion faces the wall surface of the structure 13. The size of the casing 15 of the inspection device 13 is designed to be an arbitrary size according to the size of the monitoring target 11. For example, it is formed as a box having a side of about 10 cm.

  In the mounted state of the inspection device 13, the imaging unit 14 </ b> A of the camera device 14 is directed to the monitoring target 11. Thereby, the camera apparatus 14 can image the monitoring object 11 based on the commanded imaging timing.

  In the structure of the present embodiment, the casing 15 of the inspection device 13 has a sealed structure in which the external environment is completely shut off in an attached state and the inside is isolated from the outside. That is, external light (such as sunlight), wind and rain, and the like are completely prevented from entering the inside of the casing 15. Therefore, the inside of the casing 15 of the inspection apparatus 13 is in a completely sealed dark box state. Further, the housing 15 according to this embodiment has a double structure composed of an external housing 15A and an internal housing 15B, enhances the function of eliminating the influence from the outside, and further condenses on the inspection apparatus 13 installed outdoors. Is preventing. The outer casing 15A and the inner casing 15B of the casing 15 are usually made of a non-metallic material that transmits radio waves. When a metal material is used for the housing 15, a structure for pulling out the antenna portion of the wireless device 18 out of the housing 13 is necessary.

  When the camera device 14 performs an imaging operation inside the casing 15 having the above shape and structure, it is necessary to make the monitoring target 11 visible. Therefore, a lighting device 16 is provided inside the housing 15. The number of lighting devices 16 is arbitrary. When the camera device 14 performs an imaging operation, the lighting device 16 is turned on based on a lighting timing command and performs a lighting operation.

  In the inspection apparatus 13 shown in FIG. 1, 17 is a control device, 18 is a wireless device, and 19 is a power supply device. The control device 17 is configured by a chip including a CPU and a memory, controls the imaging operation of the camera device 14 and the illumination operation of the illumination device 16, and further stores image data acquired by the imaging operation of the camera device 14 in the memory. Thereafter, processing such as transmission to the outside is performed. The wireless device 18 has a radio wave transmission / reception function, is connected to the wireless communication unit of the external higher-level management device via wireless communication at an appropriate timing, and sends a control command from the management device to the control device 17. For example, or transmitting image data or the like stored in the control device 17 to an external management device. The power supply device 19 is, for example, a battery or a solar battery, and supplies necessary power to the camera device 14, the illumination device 16, the control device 17, the wireless device 18, and the like. In the case of a solar cell, the solar battery is attached to a place exposed to the sun outside the housing 15, and an electric wire is wired inside the housing 15. In the case of a normal battery, a replaceable structure is added to the housing 15. Moreover, it can also be set as the structure which supplies electric power by wire from an external commercial power supply instead of the power supply device 19.

  The camera device 14, the illumination device 16, the control device 17, the wireless device 18, the power supply device 19, and the like provided in the casing 15 of the inspection device 13 are preferably arranged on a single substrate 20. ing.

  FIG. 2 shows a block diagram of the internal configuration of the inspection apparatus 13. The imaging unit 14A of the camera device 14 faces the monitoring target 11 of the structure 12, and an illumination device 16 that illuminates the monitoring target 11 is disposed. The control device 17 is connected to an external management device 22 via a wireless device 18 and a radio wave (wireless) 21. The control device 17 normally controls each operation of the camera device 14 and the illumination device 16 according to a control instruction from the external management device 22, for example, and receives imaging data from the camera device 14. The control device 17 stores the acquired imaging data in a memory, and further transmits the image data to the management device 22 via the wireless device 18 and the radio wave 21 at an appropriate transmission timing. Each of the control device 17 and the management device 22 includes determination means for performing a required determination process regarding the monitoring target 11. This determination means has a function of determining, for example, the deterioration state of a crack to be monitored and determining whether maintenance or repair is necessary. If maintenance or repairs are necessary, contact or notify the person in charge of management urgently. Such a determination is normally performed by a determination unit of the external management device 22, but may be configured to be performed by a determination unit provided in the control device 17.

  The inspection operation of the inspection apparatus 13 will be described based on the flowchart shown in FIG. In the first stage, the entire inspection apparatus 13 is in a sleep state and is kept in a standby state (step S11). In step S11, there is specifically a determination step S12 for determining whether or not the inspection activation trigger 23 has been received from the external management device 22 via radio. If the determination step S12 is NO, the determination step S12 is periodically repeated. If YES in the determination step S12, it is when the inspection activation trigger 23 is received. When the inspection activation trigger 23 is received, the control device 17 is activated (step S13), the lighting device 16 is turned on (ON operation) (step S14), and the imaging operation of the camera device 14 is further executed (step S15). With the imaging operation of the camera device 14, the control device 17 stores the imaged image data related to the monitored object 11 in the memory (step S16). After the imaging is completed, the lighting operation of the illumination device 16 is naturally turned off. Thereafter, the control device 17 further transmits the image data stored in the memory to the external management device 22 via the wireless device 18 and radio waves. When the imaging inspection for the monitoring target 11 is completed, the control device 17 is substantially turned off (sleep state) (step S18), and the process proceeds to step S11 in the apparatus standby state.

  According to the inspection apparatus 13 according to the above-described embodiment, it is possible to periodically acquire and monitor the generation state or progress state information (current state information) of the monitoring target 11 by imaging with the camera apparatus 14. At this time, the inspection device 13 can be installed in advance in the area of the monitoring target 11 of the structure 12 and fixed to perform fixed point monitoring. Since the casing 15 of the inspection device 13 has a sealed structure, it is possible to take an image by using illumination by the illumination device 16 at the time of imaging, and it is possible to completely eliminate the influence from the external environment (sunlight, air, wind, etc.) and have high accuracy. Image data can be obtained, and subsequent maintenance and other decisions can be made appropriately. By attaching the inspection device 13 to the location to be monitored, except for the first stage, it is a stable monitoring target that is not affected by the environment even in the outdoors, regardless of whether it is accessible or difficult to access. 11 image data can be acquired remotely.

  In the above embodiment, the enclosure 15 is completely sealed by the double structure of the casing 15 to completely isolate the influence of the external environment, but the influence of the external environment (the degree of isolation) is reduced. It can also be configured to provide incomplete isolation. For example, the housing 15 can be configured by only one wall portion without using a double structure. Further, the housing can be formed by only one wall portion, and an opening and a light projecting portion can be provided on the wall portion of the housing so that external light (such as sunlight) can be guided to the inside. . This configuration diagram is shown in FIG. 4 as an inspection apparatus 13 according to the second embodiment. In FIG. 4, the casing 24 is formed by only one wall portion. For example, an opening 24 a is formed in the wall portion of the housing 24. External light can be taken in through the opening 24a. In this case, since imaging can be performed using external light, it is possible to omit installation of the illumination device 16. Since the other configuration is the same as that of the inspection apparatus 13 according to the first embodiment, the same elements as those described with reference to FIG.

  In the inspection apparatus 13 according to the above embodiment, the imaging unit of the camera device 14 is used as the monitoring unit, but the monitoring unit is not limited to this. For example, it is also possible to use sensing means such as an ultrasonic sensor, an X-ray or infrared sensor, a MEMS device sensor, or a sounding device sensor.

  Next, a third embodiment of the inspection apparatus according to the present invention will be described with reference to FIG. The inspection device 13 is attached to the structure 12 in a sealed state by a housing 32 so as to cover the monitoring target 31 of the structure 12 as in the first embodiment. Moreover, the housing | casing 32 of the test | inspection apparatus 13 is not a double structure similarly to the housing | casing 24 of the test | inspection apparatus 13 of 2nd Embodiment, and is formed only with one wall part. The monitoring target 31 is not a crack itself generated in the structure 12 but a stress visualization member attached to a place where the crack may occur. The “stress visualization member” is a member having a characteristic that the color changes when stress is applied to the surface of the attached structure 12. As for the stress visualization member, in recent years, for example, a technique called “visualization of strain of an aluminum specimen using an opal thin film” has been proposed. The imaging unit 14 </ b> A of the camera device 14 of the inspection device 13 is arranged to image the monitoring target 31. Other configurations and operations are the same as the configurations and operations described in the first embodiment, and the same elements are denoted by the same reference numerals and description thereof is omitted.

  According to the inspection apparatus 13 according to the third embodiment, it is possible to obtain image data relating to the color change of the monitoring target 31 by imaging the monitoring target 31 formed of the stress visualization member at an appropriate timing by the camera device 14. it can. Then, the color change of the monitoring target 31 is detected based on the image data, and the occurrence state or progress state of the deterioration of the attachment location of the monitoring target 31 in the structure 12 is determined based on the color change of the monitoring target 31. Configured. Thus, quantitative evaluation of the monitoring object 31 can be performed using stress visualization.

  Next, a fourth embodiment of the inspection apparatus according to the present invention will be described with reference to FIG. This inspection device 13 basically has the same configuration as the inspection device 13 according to the third embodiment, and only the monitoring target is different. The monitoring target 41 is a bolt for fixing the structure 12. Accordingly, the imaging unit 14A of the camera device 14 is arranged so as to capture the top of the monitoring target 41 (bolt top) that is a bolt. Other configurations are the same as the configuration 4 described in the first embodiment, and the same elements are denoted by the same reference numerals and the description thereof is omitted.

  The inspection apparatus 13 according to the fourth embodiment is premised on using a well-known DTI (Direct Tension Indicating) system. In other words, the “DTI system” is an axial force detection system that incorporates a mechanism for detecting distortion linked to the bolt's elongation due to axial force inside the bolt and displays the degree of distortion as axial force by color change. is there. The bolt that is the monitoring target 41 is a bolt that incorporates the DTI mechanism.

  According to the inspection apparatus 13 according to the fourth embodiment, the monitoring target 41 that is a bolt incorporating the DTI mechanism is imaged at an appropriate timing by the camera device 14 to obtain image data relating to the color change of the monitoring target 41. be able to. When the axial force of the bolt changes, the color of the bolt top changes, so by obtaining color image data, the change in axial force, that is, the fastening force (slack) of the monitoring object 41 can be evaluated. As described above, a change in the color of the top of the monitoring target 31 is detected based on the image data, and the state of the axial force of the monitoring target 41 is determined based on the change in the color of the top of the monitoring target 31. .

  The configurations, shapes, sizes, and arrangement relationships described in the above embodiments are merely schematically shown to the extent that the present invention can be understood and implemented, and the numerical values and the compositions (materials) of the respective components Is just an example. Therefore, the present invention is not limited to the described embodiments, and can be variously modified without departing from the scope of the technical idea shown in the claims.

  The inspection apparatus according to the present invention is used as an inspection unit of an infrastructure monitoring system, and is used to perform fixed-point inspections compared to artificial visual inspections and the like, and to solve problems such as visual inspections that go around.

DESCRIPTION OF SYMBOLS 11 Monitoring object 12 Structure 13 Inspection apparatus 14 Camera apparatus 14A Image pick-up part 15 Case 15A External case 15B Internal case 16 Illumination device 17 Control device 18 Wireless device 19 Power supply device 20 Substrate 22 Management device 23 Inspection start trigger 24 Case 24a Opening 31 Monitored object 32 Housing 41 Monitored object

Claims (7)

A housing that is attached to cover the monitoring target and has a double wall structure that isolates the monitoring target from the outside;
Current status information acquisition means that is arranged inside the housing of a double wall structure and acquires the current status information from the monitoring target;
An inspection apparatus comprising:   The inspection apparatus according to claim 1, wherein the casing has a sealed interior, and the current state information acquisition unit is an image acquisition unit.   The image acquisition means is an imaging device, and further includes an illumination device and a transmission device inside the housing, and an image related to the monitoring target acquired by the imaging device under illumination of the illumination device is the transmission The inspection apparatus according to claim 2, wherein the inspection apparatus is transmitted to an external management unit by the apparatus. The monitoring target is a crack portion of a social infrastructure facility, a stress visualization member provided at a predetermined location of the social infrastructure facility, or a bolt having a top portion that changes color according to an axial force. 3. The inspection apparatus according to 3. 5. The inspection apparatus according to claim 3, wherein quantitative measurement is performed based on an image related to the monitoring target . 2. The inspection apparatus according to claim 1, further comprising a determination unit that determines the status of the monitoring target based on the current status information acquired by the current status information acquisition unit . The inspection according to claim 1, further comprising a determination unit that transmits a signal related to the current state information acquired by the current state information acquisition unit to the outside, and determines the status of the monitoring target based on the current state information. apparatus.

Images