JP3416875B2 - Civil engineering / construction structure condition inspection system and sensor-integrated device used therefor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for nondestructive inspection of physical and chemical states of tunnels, bridges, civil engineering and construction structures such as buildings, and its use.
The present invention relates to a sensor integrated device .

[0002]

2. Description of the Related Art Cracks and other state changes that occur in concrete structures such as civil engineering structures such as tunnels and bridges and construction structures such as buildings are inspected to identify the deterioration state and the degree of danger of the structure, Taking measures against these is extremely important for safety. Conventionally, most of these inspections are performed by visual inspection.

[0003]

However, in the visual inspection, for example, in the case of an inspection for a high place such as a tunnel or a bridge, it is necessary to construct a scaffold, which requires troublesome work such as assembling and disassembling the scaffold. In addition, traffic regulation may be necessary. Moreover, since preparations such as scaffolding are required in advance, it takes a lot of days for the inspection, and there is also a problem that the inspection cannot be executed promptly as needed. In addition, the visual inspection is only an inspection of the structure surface, and since it is only for those that can be visually confirmed, deterioration that is progressing in the deep part of the structure and subtle changes that cannot be visually confirmed, Furthermore, changes in chemical state cannot be captured.

The present invention has been made in view of the present situation, and does not require troublesome work such as assembling a scaffold at the time of inspection, and can inspect not only the surface of the structure but also the internal condition. Furthermore, civil engineering that can reliably detect subtle abnormalities and chemical state changes that cannot be visually confirmed.
It is intended to provide a method and system for inspecting the condition of a construction structure.

[0005]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventor has embedded a plurality of function sensors in civil engineering / construction structures, and analogs included in each part of the structure captured by these function sensors. It was thought that the state inside the civil engineering / construction structure could be inspected nondestructively by detecting the physical state quantity, collecting the detection result on the electromagnetic wave, and collecting it in the moving body without contact. Then, if some or all of the electric power required to transmit the signal detected by the function sensor to the moving body is obtained from the electromagnetic waves emitted from the moving body side, battery replacement of the structure installation side device The idea was that it would be possible to construct an inspection system with excellent maintainability because it would be unnecessary. Further, by adding the ID of the function sensor, which is the signal generation source, to each of the signals collected from the function sensor, it was thought that the acquisition location of each of the collected inspection information could be specified.

The civil engineering / construction structure state inspection method of the present invention completed based on such an idea detects an analog state quantity of each part of the civil engineering / construction structure. A plurality of functional sensors are embedded in the entire area to be inspected, electromagnetic waves emitted from the moving body are used as a power source to supply electric power to the moving body in a non-contact manner, and an ID for distinguishing each sensor is added to the state quantity detected by the functional sensor. It is characterized by inspecting the state of each part of civil engineering / construction structure by collecting and analyzing the inspection information in a moving body in a non-contact manner. According to such an inspection method, since the functional sensor is embedded in the structure and the signal sent from each sensor is provided with the ID, the information on the deep part of the structure can be obtained together with the position information. Moreover, since information is collected in a non-contact manner, it is not necessary to connect terminals, etc.
Moreover, since the inspection information transmitting side equipment (structure installation side equipment) obtains electric power from the electromagnetic waves emitted from the moving body, it is not necessary to replace the battery.

The state inspection system for civil engineering / construction structures proposed based on such a concept can be roughly classified into the following two types. These two types are distinguished by the difference in the form of the inspection information transmitting side equipment installed on the structure side.

First of all, a plurality of function sensors are embedded in a region to be inspected, and output signals derived from these are collected at a specific location of a civil engineering / construction structure, and these signals are transmitted through a collective transmission device provided at the location. The second is to produce a compact sensor-integrated device in which a functional sensor and a signal processing circuit or a transmission circuit are integrated, and a plurality of these are embedded in the entire area to be inspected, The mobile body directly exchanges information with these sensor-integrated devices.

The first inspection system is provided with a plurality of function sensors, which are embedded in a whole area of an inspection target of a civil engineering / construction structure and detect an analog state quantity of each part of the civil engineering / construction structure, and these functions. Signal collecting means for collecting respective output signals of the sensor group at a specific location of the civil engineering / construction structure, and a device installed at a specific location of the civil engineering / construction structure, the sensors constituting the functional sensor group. Means for converting each output signal into a digital signal, means for transmitting inspection information by adding an ID for identifying a functional sensor, which is a signal generation source, to these signals, and a part of driving power for these means Or a collective transmitting device provided with a means for obtaining all of them from electromagnetic waves emitted from a moving body, and an electromagnetic wave that is movable with respect to the collective transmitting device. A moving body having means for irradiating and electrically supplying electric power to the collective transmission device in a non-contact manner, and a means provided with a means for non-contactly receiving inspection information on each part of civil engineering / construction structure transmitted by the collective transmission device It is characterized by comprising an analysis means for analyzing the inspection information collected in the mobile body.

The second inspection system is used for civil engineering
A functional sensor that detects an analog state quantity of a construction structure, a unit that converts the output signal of the functional sensor into a digital signal, and an ID that identifies the functional sensor that is a signal generation source
And means for transmitting inspection information including the output signal of the digitalized functional sensor and the ID on electromagnetic waves, and irradiating a part or all of the driving power of these means from the moving body. The sensor-integrated device group in which a plurality of sensor-integrated devices, which are integrated with the means for obtaining from the electromagnetic wave, are embedded over the entire area to be inspected, and the sensor-integrated device are movable and irradiate the electromagnetic wave. In addition to providing a means for supplying electric power to each of these sensor-integrated devices in a non-contact manner,
It is characterized by comprising a moving body provided with a means for receiving inspection information concerning each part of the construction structure in a non-contact manner, and an analyzing means for analyzing the inspection information collected by the moving body.

The sensor-integrated device embedded in the structure must not function as a foreign substance to the material of the structure. When functioning as a foreign substance, its presence itself causes cracks in the structure. Therefore, the outer shape and surface texture of the sensor-integrated device should be selected so that it does not function as a foreign material with respect to the constituent materials of the civil engineering / construction structure. For example, it is preferable that the sensor-integrated device is configured in a ring shape and is embedded in the structure so that the constituent material of the civil engineering / construction structure penetrates through the hole of the sensor-integrated device to enhance the integrity with the structure material.

In order to specify the state of each part of the inspection area of the structure based on the collected data, the moving body or analysis means is made to hold map information indicating the relationship between the ID for specifying the functional sensor and the buried position. It is preferable.

Although the above-mentioned is to inspect the current state of the structure, it is also important to inspect what state the structure has reached to the present. In order to achieve this object, it is desirable to provide a collective transmission device or a sensor-integrated device with means for constantly monitoring the output signal of the sensor and recording history information of the peak value of the state quantity.

There are many examples of application of the present invention. For example, a vehicle running in a tunnel is equipped with a data collection function, which is used as a moving body to inspect the state of the tunnel wall body. Is a typical example.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Next, details of the present invention will be described based on illustrated embodiments. FIG. 1 illustrates the concept of the present invention. The present invention takes out an analog state quantity included in a civil engineering / construction structure in the form of inspection information, puts this inspection information on an electromagnetic wave, and collects it in a moving body in a non-contact manner. Then, in order to detect the analog state quantity, a plurality of functional sensors are embedded over the entire area to be inspected of the structure, and part or all of the electric power required for signal transmission from these sensors to the moving body is transferred from the moving body. It is designed to be received from the electromagnetic waves emitted.

The civil engineering / construction structure to which the present invention is applied is
Tunnels, bridges, and concrete structures such as buildings are the main ones, but anything other than concrete structures is not excluded as long as the function sensor can be embedded. In addition, the analog state quantity to be collected is the state quantity necessary for knowing the degree of crack occurrence and the state of deterioration of the structure, and specifically, tensile force, compression force, elongation and strain, hardness and surface texture, etc. They are mechanical state quantities, physical state quantities such as electrical conductivity, dielectric constant and magnetic flux density, chemical state quantities such as acidity and salt content of constituent materials, water content and temperature.
Further, the concept of the state quantity includes the current state quantity and the change value of the state quantity.

The moving body that receives the inspection information moves to the collective transmission device or the sensor-integrated device that is the inspection information transmitting side equipment, and the moving body is an electromagnetic wave to the inspection information transmitting side equipment. At least a means for irradiating the object and supplying electric power in a contactless manner and a means for receiving the inspection information transmitted by the transmission source device in a contactless manner are provided. Specific examples of the means for irradiating electromagnetic waves to supply electric power in a non-contact manner include a means for magnetically coupling the opposing coils to transfer electric power. The reason for being configured to be movable here is that when the inspection target area covers a wide range, it is necessary to move among a large number of transmission source devices one after another and collect inspection information from these devices. Such a moving body can take various forms, a form in which each of the means is mounted on a vehicle such as an automobile or a train, a form of a robot,
Further, it may be in the form of a terminal device carried by an attendant.

As the functional sensor, one having a function of detecting these analog state quantities is used. For example, FIG.
As shown in (a), it is possible to employ a device that detects the state quantity that changes with the passage of time as a change in current value.
The peaks shown as a1, a2, and a3 here indicate that although the state temporarily changed, the amount of change was small, so that the state before the change was restored, while the peak shown as b was unrecoverable. It means that a state change such as a crack has occurred. It is absolutely necessary to detect the state of b when inspecting the state of the structure.
The detection of the states of 1, a2 and a3 may or may not be necessary. In addition, since the state of b is not restored, it can be known from the state quantity at the present time that the state of b is restored, but since the states of a1, a2, and a3 are restored, the structure changes these states. It is necessary to keep a history in order to know that it has reached the present. The analog amount detected by the sensor is handled after being converted into a digital amount, but conversion into this digital amount may be multivalued as in (b) or binarized as in (c). To be If it suffices to detect only the unrecoverable state of b and notify the moving body, binarization may be performed, and a1, a2, a
If the state of 3 is also transmitted to the moving body as history information, it is necessary to make it multi-valued.

As the functional sensor, a sensor that detects the state quantity or a change in the state quantity as a current change or a voltage change is preferable. A more specific example is a bundle of carbon fibers as shown in FIG. This sensor is formed by bundling a plurality of carbon fibers 11, 11, ... By the tensile force acting on the sensor, the carbon fibers 11, 11 ,.
A part of 11 is broken and is regarded as a change in resistance value, and a crack generated at the inspection location is detected.
It should be noted that the change in state at the inspection location is caused by the carbon fibers 11, 11 ...
If it is a small one that does not lead to the breakage of…,
The change in state is detected as an increase in resistance value due to the elongation of the carbon fibers 11, 11.

Such sensors S are vertically and horizontally arranged and embedded in the inner wall of the tunnel as shown in FIG. 5, for example. The distance between the adjacent sensors S and the burial depth may be appropriately set according to the inspection purpose. There are roughly two ways of transmitting the state quantity detected by the sensor S to the moving body. A collective transmission device that connects the sensors embedded vertically and horizontally in the inspection target area and the signal processing device arranged at a specific location of the civil engineering / construction structure by electrical wiring and processes the output signals of the sensors A method of collecting the state quantity from the aggregate transmission device to the mobile body after collecting the state quantity. A small sensor-integrated device in which a sensor, a signal processing circuit, and a transmission circuit are integrated is manufactured, and a plurality of these sensor-integrated devices are embedded vertically and horizontally over the entire area to be inspected. How to send quantity directly.

FIG. 6 shows the concept of the method of FIG. 6, in which the sensors S, S .. It means to send an electromagnetic wave carrying data on the state quantity toward. In this case, the signal processing device D does not need to be embedded, and the size of the signal processing device D does not have to be embedded, and the space for mounting an additional circuit for adding an additional function is not required. In addition to the above, there is an advantage that a battery can be built in the collective transmission device D, and this battery can be used as an auxiliary power source of electric power supplied from a moving body.

In the case of the method for this, how to realize the miniaturization and the cost reduction of the sensor-integrated device is a problem, but it has an advantage that it is not necessary to crawl the electric wiring. Further, in this method, it is also important that the sensor-integrated device does not function as a foreign substance on the civil engineering / construction structure. As a solution to this, for example, FIG.
A sensor-integrated device SD having an appearance as shown in (a) is proposed. The sensor-integrated device SD is a ring body covered with a synthetic resin, and has a surface roughened or provided with an uneven portion. As a synthetic resin material, it is preferable to use an environment-resistant resin having long-term durability. Further, it is preferable to use the foamed synthetic resin from the viewpoint of being compatible with the structural material. If the size of the sensor-integrated device is too large, the device itself becomes a foreign substance and causes a crack. Therefore, it is desirable that the size of the sensor-integrated device SD is generally smaller than the crushed stone contained in the concrete material. Further, the ring shape is used because the hole is filled with the constituent material of the civil engineering / construction structure so as to enhance the integrity with the constituent material. The ring body may be a ring body having a quadrangular outer shape as shown in FIG. 10 (a), but a circular shape having no corners as shown in FIGS. It is preferable in terms of suppressing generation. Also, the surface is roughened or provided with an uneven portion in order to enhance the integrity with surrounding materials.

As an internal structure of such a ring body, for example, as shown in FIG. 7B, a sensor S formed in a ring shape and an antenna coil C for transmission and reception are provided in a signal processing section P composed of a semiconductor circuit. A connected configuration can be adopted.
In this case, the sensor S and the antenna coil C can be arranged by utilizing the ring-shaped outer shape of the sensor integrated device SD, which can contribute to the downsizing of the sensor integrated device SD. Instead of forming the sensor S in a ring shape, as shown in FIG. 10C, a band-shaped sensor S may be connected to the ring body. Then, as shown in FIG. 8, the crack CR generated around the embedded position of the sensor-integrated device SD is detected as a force for deforming the sensor S. Crack C in the example
Since R passes through the hole H of the sensor-integrated device SD, the sensor-integrated device SD increases as the crack width increases.
The force to make the ring shape of the ellipse acts.
In the figure, ST is a crushed stone contained in the concrete material, and the sensor-integrated device SD is set to a size substantially equal to or smaller than this gravel stone ST.

The inspection information transmitted from these sensor-integrated devices SD is collected by a moving body that moves between the sensor-integrated devices SD one after another. The operation of acquiring the inspection information may be temporarily stopped at a short distance of the target sensor-integrated device SD, or may be continuously moved without being stopped. Further, when the information is acquired by stopping once, it may be moved to the next area each time the acquisition of the inspection information from the plurality of sensor-integrated devices SD existing in a certain area is completed.

The inspection information collected from the sensor-integrated device SD includes the ID of the sensor S in order to distinguish each of the inspection information. As the ID, an ID represented by a number is usually used, but another expression format may be used as long as the IDs can be distinguished from each other. Since the inspection information is accompanied by the ID, it is possible to specify from which sensor S the state quantity is output. Then, a map database DB in which map information indicating the relationship between the ID and the arrangement position of the sensor S is recorded, a large amount of map information is stored in advance, and it corresponds when inspecting each inspection target area. The distribution of the state quantity in the inspection area can be reproduced on the computer by extracting and referring to the map information.

FIG. 11 shows a typical structure of an inspection system using the sensor-integrated device SD. This system includes a plurality of sensor-integrated devices SD embedded in a civil engineering / construction structure, a mobile unit M that moves between the plurality of sensor-integrated devices SD to collect inspection information, and a map database DB. It is configured. Although only one sensor-integrated device SD is drawn in the figure, in reality, a large number of sensor-integrated devices SD are present in a matrix form in the vertical and horizontal directions over the entire inspection target area of the civil engineering / construction structure. It is movable with respect to a large number of sensor-integrated devices SD, and moves between adjacent sensor-integrated devices SD to collect inspection information.

The sensor-integrated device has at least A / A for converting an analog signal output from the sensor into a digital signal.
A D converter 1 and a control circuit 3 are provided. The control circuit integrates various functions required for operating the sensor-integrated device SD, and at least has a function of giving ID to the digitized state quantity as inspection information and a mobile unit M. It has a non-contact communication function. This communication function has a content of transferring the inspection information to the mobile unit M and receiving a timing clock signal and an operation command from the mobile unit M side. An even more significant feature is that it has a function of obtaining electric power for the transfer from electromagnetic waves emitted from the mobile body side. To secure this power, the timing clock signal sent from the mobile unit and the electromagnetic wave carrying the operation command are received by the data transmitting / receiving coil 4, and the coil is connected by magnetic coupling with the data transmitting / receiving coil 9 on the mobile unit M side. It is obtained by rectifying the current induced in No. 4. The intensity of the electromagnetic wave that serves as a power source depends on the sensor-integrated device SD and the moving body M.
It is set in consideration of the distance between and. As the data transmission / reception coil 4, it is preferable to use a sheet coil made by drawing a pattern on a substrate. If the sheet coil is used, the coil can be thinned and can be formed together with the control circuit on the same substrate, so that mass productivity can be improved. Since the sensor-integrated device SD needs to be embedded in a large amount, it is extremely important to have excellent mass productivity and low cost.

Although the data transfer speed and the data transfer distance may be set appropriately according to the inspection environment, the present inventor has confirmed that the mobile unit M travels at a speed of 15 km / h (4.2 m / s). In the data collection vehicle,
It has been confirmed that if the data transfer distance is set to about 2 m, information transfer of about 500 bits will be possible. On the other hand, the control circuit 10 incorporated on the mobile body side has a function of supplying electric power to the sensor-integrated device SD, and the sensor-integrated device S.
It has a function of giving a timing clock signal and an operation command to D, and a function of receiving inspection information from the sensor integrated device SD. The system also has a map database. As shown in this map database, the ID number of the functional sensor (ID: 0001
~) And their embedded positions g (1,1) to g (m, n) are recorded as map information G.
It is for reproducing the distribution of the state quantity in the inspection target area based on the inspection information collected in. Here, the map database is provided outside the moving body M, and the map database DB is accessed from the moving body M. However, the map database DB is built in the moving body M, or built in a separately provided analysis device. It may be done. The analysis device may be a dedicated device or a general-purpose device such as a personal computer.

Such an inspection system is used, for example, as follows. Here, the case where a tunnel is an inspection target will be described. First, a sensor-integrated device SD is vertically and horizontally embedded in the tunnel as the civil engineering / construction structure B as shown in FIG. This burial will be done at the time of tunnel construction. A mobile unit M in such a tunnel
Collect the data while passing the vehicle and moving. Data collection is performed by first sending electric power, a timing clock signal, and an operation command from the mobile unit M side, and acquiring the data that the sensor-integrated device SD responds to and returns. When the vehicle approaches, the intensity of the electromagnetic wave emitted from the vehicle increases, and the current induced in the sheet coil by the electromagnetic wave exceeds a certain level. It is possible to do this by activating SD. Then, the device SD in the active state converts the analog state quantity output by the sensor S integrated in the device SD into a digital signal, and adds the ID number peculiar to the sensor to the inspection information produced. The electromagnetic waves transmitted from the sheet coil are transferred to the moving body M in a non-contact manner. The driving sources for various processes in the device are all supplied from the vehicle side. The inspection information transferred from the device side is received by the vehicle side and processed inside or outside the vehicle. In the figure, there is shown a case where the inspection information collected in the vehicle is transmitted to a personal computer as an analysis means AN by using a recording medium such as an IC card, a floppy disk, or a removable hard disk as a transmission means for analysis. Map data showing the relationship between the ID number and the sensor arrangement position is stored on the hard disk of the personal computer, and the condition of each part of the tunnel is analyzed with reference to this map data to detect cracks CR and predict the occurrence of cracks. Etc. are detected. For example, this analysis result is
It is preferable to display the map on the display of a personal computer and mark the crack generation points so that the state of the inspection target area can be seen at a glance. Also,
Here, we decided to analyze with a PC outside the vehicle,
A personal computer or other dedicated analysis device may be mounted on the vehicle for immediate analysis at the same time as data collection.

Although the example described above was to analyze the current state of the civil engineering / construction structure, it is also important to analyze the history information of what state each part of the civil engineering / construction structure was in the past. Is. In this case, inside the sensor-integrated device SD, a mechanism for operating the sensor without receiving the external power supply and a mechanism for recording the state amount detected by the sensor without receiving the external power supply are required.
FIG. 13 shows a schematic configuration of a sensor-integrated device SD that realizes such an operation mode. In this configuration, in addition to the configuration shown in FIG. 11, a power saving type detection circuit 5, a maximum value detection circuit 6, a non-volatile memory 7 and a battery 8 are provided.

The power-saving type detection circuit 5 is an interface for operating the sensor S without being supplied with an external power source. This circuit is designed to always maintain balance with a weak electric power, detect a signal and send it to the control circuit 3 only when a change in the value is detected, and activate the CPU. And considering the secular change of the sensor output value,
It is always automatically adjusted so that an excessive current does not flow when there is no change. Further, the maximum value detection circuit 6 is provided in order to record only the peak value of the state quantity instead of recording all the state quantity changes. Then, the peak value detected by the maximum value detection circuit 6 is recorded in the non-volatile memory 7 together with information on the date and time of occurrence thereof. The nonvolatile memory is a flash memory or the like. Power is supplied to each of these circuits from a battery 8 which is an internal power supply. The battery 8 is intended to be one that can continue to supply power for a long time, and a lithium battery or the like can be cited as a candidate. It should be noted that a charging battery that can be charged by using electromagnetic waves as a power source when irradiated by electromagnetic waves from a moving body is used, or a capacitor (not shown) that stores electric power generated by the electromagnetic waves is provided to supplement this power supply. It can also be used as. Such a sensor-integrated device SD can continue to record the output of the sensor S even when it is not supplied with power from the outside. Only the important information (peak value) in the history information of will be delivered.

Although the case where the sensor-integrated device is used has been described above, the technique applied to the sensor-integrated device, that is, the power-saving detection circuit 5, the maximum value detection circuit 6, the non-volatile memory 7 and the battery is used. The mounting technology and the like can be applied even when the sensor-integrated device SD is not used.
FIG. 14 shows a configuration in this case, and shows an application to a system in which output signals of a plurality of sensors S embedded in an inspection target region are aggregated in a collective transmission device D by wiring. In this example, the output of the sensor S is guided to the collective transmission device D by wiring laid on the surface of the civil engineering / construction structure or inside, and among the sensors S, the sensor whose distance to the collective transmission device D is long is for signal amplification. The adapter A is interposed to lead to the collective transmission device D. Then, the data is transferred from the collective transmitting device D to the mobile body M via the electromagnetic wave, and the data collected in the mobile body M is wirelessly transmitted.
Data is collected and analyzed in a personal computer as an analysis device AN by using a transmission means typified by a removable recording medium such as a wired or IC card, a floppy disk, a removable hard disk. The collective transmission device D is, for example, as shown in FIG.
The IC chips 20 and 21 having the functions corresponding to the circuits disclosed in FIG. 13 are provided in a robust housing, and the removable battery 22 is provided in the housing so that the battery can be replaced when the battery is exhausted. Is configured as follows. Such a collective transmission device D is attached at a position where it can communicate with the moving body M on the surface of the civil engineering / construction structure, and as shown in FIG. Data to or from Figure 17
As shown in, the electromagnetic waves emitted from the mobile terminal carried by the inspector are used as a power source to transfer data to the mobile terminal. It is also preferable that the collective transmission device D has a time management function, and time data is added to the measurement data as history information recorded in the flash memory,
Alternatively, the operation of the sensor or the CPU may be controlled based on the measurement schedule.

The civil engineering / construction structure inspection system according to the present invention described above can be applied to various civil engineering / construction structures. As shown in FIG.
It can be widely applied to a concrete structure such as a bridge as shown in FIG. 18 (b) and a general building such as a building as shown in FIG. 18 (c), as well as a structure other than the concrete structure. Have the potential. In addition, as a further application, it is expected to be applied to the detection of temperature change in the curing process after placing concrete.

[0034]

[Advantage of the Invention] State of civil engineering / construction structure according to claim 1
According to the inspection system , the state of each part of the civil engineering / construction structure can be inspected in a non-destructive and non-contact manner, so there is no need to assemble scaffolding or restrict traffic during inspection.
The inspection can be done at any time without any pre-work. Moreover, since the obtained inspection information is accompanied by the ID, each portion for which the inspection information is obtained can be accurately specified, and the state of each portion over the entire inspection target area can be accurately known together with its positional relationship. Power is supplied to the circuit that processes the sensor output by irradiating electromagnetic waves from the mobile side, so there is no need to install a battery in the inspection information transmitting equipment, or no battery replacement or long-term It has excellent maintainability. Furthermore, from multiple functional sensor groups
Output to a specific location of civil engineering / construction structure
A system structure that sends inspection information to mobile units via a communication device
Since it is adopted, it is embedded in the inspection points of civil engineering and construction structures.
Easy to embed because only small sensor is needed
Becomes In addition, the collective transmission device is embedded in civil engineering and construction structures.
Since there is no need to embed it, it is
Maintenance is simple and there are no restrictions on its size.
Therefore, by mounting various processing circuits,
Higher functionality can be achieved.

According to a second aspect , the function sensor and the transmitter are transmitted.
Sensor-integrated device that integrates circuit groups including functions
Using this sensor-integrated device and mobile unit
If you directly exchange information with the
It is necessary to derive the wiring from the sensor as in the invention described in item 1.
Can be eliminated. And the sensor-integrated device
Electromagnetic waves that radiate all of the required power from the moving body side
By providing the
-Can be maintenance. In addition, integrated sensor
The shape of the mold device is ring-shaped, and the sensor-integrated device is
Insert the vise into the hole of the construction material of the civil engineering / construction structure.
Since it can be embedded integrally with the structure in a passed state,
The sensor-integrated device is familiar with the constituent materials and
Completely prevents the presence of a crack from causing a new crack
be able to.

As described in claim 3 , a sensor-integrated device
Determining the outer shape and surface texture of chairs from the constituent elements of civil engineering and construction structures
When devised so that the material does not function as a foreign substance,
The sensor-integrated device is familiar with the constituent materials and
Completely prevents the presence of a crack from causing a new crack
be able to.

As described in claim 4, a moving body or an analysis
Means for indicating the relationship between the embedded position of the function sensor and the ID.
If the inspection information is held, the obtained inspection information
Accurately identify where in the area the information is
Distribution of state quantities over the entire area to be inspected
You can know.

As described in claim 5 , the output of the function sensor
The signal is constantly monitored and the history information of the peak value of the state change is recorded.
If a means for recording is provided, in addition to the state at the time of inspection, the past
The condition can be grasped.

A sensor-integrated device according to claim 6
With the need to derive the wiring from the sensor,
In addition, the ring-shaped hole penetrates the constituent materials of civil engineering and construction structures.
Since it can be embedded integrally with the structure in a passed state,
The sensor-integrated device is familiar with the constituent materials and
Completely prevents the presence of a crack from causing a new crack
be able to.

[0040]

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing the basic idea of the present invention.

2A and 2B show detection signals of a sensor, where FIG. 2A is an analog signal, FIG. 2B is a multilevel digital signal, and FIG. 2C is a binary digital signal.

FIG. 3 is an explanatory diagram of a sensor configured by bundling carbon fibers.

FIG. 4 is an explanatory view showing a state where carbon fibers are broken in the sensor shown in FIG.

FIG. 5 is an explanatory view showing a tunnel as a burying place for the sensor.

FIG. 6 is an explanatory view showing the concept of a method of collecting outputs from a plurality of sensors in a collective transmitting device and processing them.

7A is an external view illustrating an example of a sensor-integrated device, and FIG. 7B is an explanatory view illustrating an internal structure of the device.

FIG. 8 is an explanatory view showing a sensor-integrated device embedded in a construction material of a civil engineering / construction structure.

FIG. 9 is an explanatory diagram showing a state in which a mobile object exchanges information while moving between a plurality of sensor-integrated devices.

10 (a), (b) and (c) are explanatory views showing another shape of the sensor-integrated device.

FIG. 11 is an explanatory diagram showing the configuration of the present system when a sensor-integrated device is used.

FIG. 12 is an explanatory diagram showing an example in which this system is applied to a tunnel inspection.

FIG. 13 is an explanatory diagram showing a configuration of a sensor-integrated device provided with a history information recording unit.

FIG. 14 is an explanatory diagram showing an embodiment in which outputs from a plurality of sensors are collected in a collective transmission device and processed.

FIG. 15 is an explanatory diagram showing a specific example of the collective transmission device used in the embodiment.

FIG. 16 is an explanatory diagram showing an example in which information is exchanged with a collective transmission device with a vehicle.

FIG. 17 is an explanatory diagram showing an example in which information is exchanged with a collective transmission device with a mobile terminal.

FIG. 18 shows an example of a civil engineering / construction structure to which the present invention is applied. (A) is a tunnel, (b) is a bridge, and (c) is
Indicates a building.

[Explanation of symbols]

A adapter AN analysis means B Civil engineering / construction structures M mobile S function sensor SD sensor integrated device L wiring D aggregate transmission device C transmitter / receiver coil P signal processing unit ST Crushed stone CR crack H hole DB map database G map information 1 A / D converter 3 control circuit 4 Data transmission / reception coil 5 Power-saving detection circuit 6 maximum value detection circuit 7 Non-volatile memory 9 Data transmission / reception coil 11 carbon fiber 20 IC chip 21 IC chip 22 batteries

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Rikito Shiraishi, 232-2, Nitta 2-32, Nitta, Ichikawa City, Chiba Prefecture (56) Reference JP-A-5-281203 (JP, A) JP-A-9- 311029 (JP, A) JP 11-287866 (JP, A) JP 7-12957 (JP, A) JP 4-43961 (JP, A) JP 2001-201373 (JP, A) Kaihei 6-194275 (JP, A) JP-A-11-232308 (JP, A) JP-A-10-255190 (JP, A) JP-B 7-50104 (JP, B2) International publication 00/026884 (WO , A1) (58) Fields investigated (Int.Cl. ⁷ , DB name) G01D 21/00 G01N 27/00

Claims (6)

(57) [Claims] [Claim 1] The entire area to be inspected for civil engineering / construction structures
A plurality of them are buried integrally with the structure over the
Detects analog state quantity of each part of tree / construction structure
Function sensor groups and output signals of these function sensor groups from the civil engineering
It is a signal gathering means for gathering at a specific location of a construction structure and a device installed at a particular location of civil engineering / construction structure.
Output of each sensor that constitutes the functional sensor group
A means to convert the signal into a digital signal and its output signal at all times
A maximum value detection circuit that monitors and detects the peak value of the state quantity
Means for recording the history information, and transmitting these signals.
IDs that identify the functional sensor that is the source
Means for transmitting inspection information on electromagnetic waves, and
Electromagnetic waves emitted from moving objects with part or all of driving power
A collective transmitting device provided with means for obtaining from the wave , and movable with respect to the collective transmitting device, electromagnetic wave
To irradiate power to the collective transmission device without contact
Means and means for timing the aggregate transmission device.
Function for giving a working clock signal and an operation command,
Related to each part of civil engineering / construction structure transmitted by the transmission device
And a means for receiving the inspection information in a contactless manner
And an analysis means for analyzing the inspection information collected in the mobile body.
And the ID of the function sensor and embedded in the moving body or analysis means.
Map data that holds map information showing the relationship with the installation location
A condition inspection system for civil engineering and construction structures that consists of a database . 2. An analog state of civil engineering / construction structure
Function sensor that detects the state of charge and the output signal of the function sensor.
To convert the signal into a digital signal and the function of the signal source
Means for adding an ID for identifying a sensor, and the digital
Including the signalized output signal of the functional sensor and the ID
Means for transmitting inspection information on electromagnetic waves and these means
A part or all of the driving power of the
Ring-shaped sensor integrated with means for obtaining from magnetic waves
Die device into the hole over the entire area to be inspected
The structure of civil engineering / construction structure with the constituent materials penetrated
A sensor-integrated device that is embedded in multiple objects and embedded in it.
Of each device group and the sensor-integrated device
These devices are integrated with these sensors by irradiating them with electromagnetic waves.
And a means for supplying electric power to each of the
Civil engineering transmitted by each of the sensor-integrated devices
・ Contactlessly receive inspection information about each part of the construction structure
And a analyzing unit for analyzing inspection information collected by the moving unit.
And a state inspection system for civil engineering and construction structures. 3. A sensor integrated device is a civil engineering / construction structure
External shape that does not function as a foreign substance to the constituent materials of the structure
The civil engineering / construction structure condition inspection system according to claim 2, having a surface texture . 4. A moving body or an analyzing means has a function sensor I
A contract that holds map information showing the relationship between D and the buried position
The civil engineering / construction structure condition inspection system according to claim 2. 5. The output signal of the functional sensor is constantly monitored and monitored.
Sensor integrated with means for recording history information of peak value of physical quantity
The civil engineering / construction structure condition inspection system according to claim 2, which is provided in the mold device . [Claim 6] Civil engineering / construction structure,
A function sensor that detects the analog state quantity of each part of the structure
Embed and move multiple sensors over the entire area to be inspected
Electromagnetic waves emitted from the body are used as a power source without contacting the moving body.
Power is supplied, and the state quantity detected by the function sensor is
The inspection information with the ID for identifying the sensor is transferred without contact.
By collecting and analyzing the moving objects, each part of civil engineering / construction structure
The function sensor and the output signal of the function sensor are used to inspect the state of
The function sensor that is the signal generation source.
Means for adding an ID to determine the digital signal
The inspection information including the output signal of the functional sensor and the ID
Means of transmitting on electromagnetic waves and driving power of these means
Obtained from electromagnetic waves emitted from a moving body
The ring-shaped shape that integrates the
The construction material of the civil engineering / construction structure in the hole over the area
To be embedded integrally with the structure in a penetrated state
Used for the condition inspection system of characteristic civil engineering / construction structures
Sensor integrated device that.