JP2002257519A - Distortion detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a distortion detecting device capable of accurately detecting a distortion. SOLUTION: This detecting device is composed of a hologram sheet 1 installed at a spot where a distortion is detected and a detector 2. The detector 2 is equipped with a light emitting means 4, a photographing means 3, a signal processing means 6, a recording means 8 to record reference digital data before or when the hologram sheet 1 is installed at the spot where the distortion is detected, a determining means 6 to determine whether or not the digital data obtained by processing an image signal obtained by photographing the hologram sheet 1 by the photographing means 3 by the signal processing means 6 is in conformity with the reference digital data recorded in advance in the recording means 8, after the hologram sheet 1 is installed at the spot where the distortion is detected, a display means 7 to display whether there is a distortion or not depending on the determined result of the determining means 6, and a storage means 10 to store the light emitting means 4, the photographing means 3, the signal processing means 6, the recording means 8, the determining means 6, and the display means 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strain detecting device, and more particularly to a strain detecting device suitable for detecting temporal distortion in buildings such as buildings, ships, bridges, tunnels, steel towers, and other structures. .

[0002]

2. Description of the Related Art Buildings such as buildings, ships, bridges, tunnels, steel towers, and other structures are subjected to loads due to earthquakes, winds, and the like during and after construction, resulting in temporal distortion. When the degree of such temporal distortion becomes large, the structure may be damaged. Therefore, it is necessary to detect the degree of such temporal distortion with a distortion detecting device during construction of a structure or during periodic inspection, and to monitor the degree.

FIG. 3 shows a configuration example of a conventional distortion detecting device.
3, the strain detecting device includes a strain gauge 21 and a detector 26 connected to the strain gauge 21 by a lead wire and a connector 27. The strain gauge 21 is configured by a bridge circuit including resistors 22, 23, 24, and 25 whose resistance changes with a change in stress. The detector 26 includes an AC power supply 28 for supplying power to the strain gauge 1, a galvanic means 29 for extracting the output of the strain gauge 21, a display 30 and a power supply 31. The strain gauge 21 is installed at a location where strain is to be detected in a building such as a building, a ship, a bridge, a tunnel, a steel tower, or another structure, and the detector 26 detects the resistance value of the strain gauge 21 during a periodic inspection of the structure. By detecting the change, the temporal distortion of the target portion in the structure is detected.

[0004]

However, the strain detecting apparatus having the above-described structure requires a lead wire and a connector 27 for connecting the strain gauge 21 and the AC power supply means 28 and the galvanic means 29 of the detector 26. This is one of the factors that increase the price of the distortion detection device. Further, in the above-described configuration, the lead wire needs to be as short as possible to avoid a detection error due to the resistance of the lead wire. Further, at the time of periodic inspection of the structure, the worker needs to move to the location where the strain gauge 21 is installed, and furthermore, the detector must be operated in the immediate vicinity of the installation location. May be dangerous.

Accordingly, an object of the present invention is to provide an inexpensive distortion detecting device which can accurately detect distortion and pays attention to the above problems.

[0006]

According to a first aspect of the present invention, there is provided a hologram sheet provided at a location to be subjected to distortion detection, and a detector. A light emitting means for illuminating the hologram sheet, a photographing means arranged at a predetermined angle and a distance to the hologram sheet to photograph the hologram sheet, and a video signal outputted from the photographing means to be processed into digital data Signal processing means, and before or at the time of installation of the hologram sheet at the distortion detection target location,
Recording means for photographing the hologram sheet by the photographing means and prerecording digital data obtained by processing the video signal from the photographing means by the signal processing means as reference digital data; and After the installation of the hologram sheet, whether the digital data obtained by photographing the hologram sheet by the photographing means and processing the video signal from the photographing means by the signal processing means matches the reference digital data recorded in the recording means in advance. Determination means for determining whether or not there is, a display means for displaying the presence or absence of distortion according to the determination result by the determination means, the light emitting means, the imaging means, the signal processing means, the recording means,
There is provided a distortion detecting device comprising: a storage unit that stores the determination unit and the display unit.

According to the first aspect of the present invention, the distortion detecting device comprises: a hologram sheet provided at a distortion detection target portion;
And a detector. The detector includes a light emitting unit that illuminates the hologram sheet, a photographing unit that is disposed at a predetermined angle and a distance from the hologram sheet, photographs a hologram sheet, and processes image signals output from the photographing unit to generate digital data. Signal processing means for converting the hologram sheet into a distortion detection target before or at the time of installation, and photographing the hologram sheet with the photographing means, and processing the video signal from the photographing means with the signal processing means as reference digital data. Digital data obtained by photographing the hologram sheet by the photographing means and processing the video signal from the photographing means by the signal processing means after recording the hologram sheet at the distortion detection target location and recording the hologram sheet in advance in the recording means. Determining means for determining whether or not the reference digital data matches the recorded reference digital data; Display means for displaying the presence or absence of distortion in accordance with the determination result, the light emitting means, imaging means, signal processing means, recording means, and a housing means for housing the determination means and display means.

According to a second aspect of the present invention, there is provided a distortion detecting apparatus according to the first aspect, wherein the hologram sheet has an image such as a figure and a mark for indicating an origin. Exist.

According to the second aspect of the invention, the hologram sheet has an image such as a figure and a mark for displaying the origin.

According to a third aspect of the present invention, there is provided a distortion detecting apparatus according to the first aspect, wherein the recording means is detachable from the storage means. Exists.

According to the third aspect of the present invention, the recording means is detachable from the storage means.

The invention according to a fourth aspect of the present invention has been made to solve the above-mentioned problem. According to a fourth aspect of the present invention, the photographing unit and the light emitting unit are separated from the storage unit to be separate modules, and are connected to the detector via a communication unit. The distortion detecting device according to claim 1, wherein the distortion detecting device is connected.

According to the fourth aspect of the present invention, the photographing means and the light emitting means are separated from the storage means to form separate modules, and are connected to the detector via the communication means.

According to a fifth aspect of the present invention, there is provided a reflection sheet provided at a location to be subjected to distortion detection, and a detector, wherein the detector comprises: a light emitting means;
The pattern means for projecting on the reflection sheet by irradiation of light from the light emitting means, and the projection of the pattern means arranged at a predetermined angle and a distance to the reflection sheet and reflected by the reflection sheet are photographed. A photographing means for processing, a signal processing means for processing a video signal outputted from the photographing means to convert the image signal into digital data, and projecting the pattern means onto the photographing means when the reflection sheet is set at the distortion detection target location. Recording means for pre-recording, as reference digital data, digital data obtained by photographing and processing the video signal from the photographing means by the signal processing means, and after setting the reflection sheet at the distortion detection target location, the reflection sheet Digital data obtained by photographing the projection of the pattern means reflected by the photographing means by the photographing means and processing the video signal from the photographing means by the signal processing means. Is, a determining means for determining whether or not the reference digital data is recorded in advance in the recording means, a display means for displaying the presence or absence of distortion according to the determination result by the determining means, the light emitting means, The pattern means, the photographing means, the signal processing means, the recording means,
There is provided a distortion detecting device comprising: a storage unit that stores the determination unit and the display unit.

According to the fifth aspect of the present invention, the distortion detecting device comprises a reflection sheet provided at a distortion detection target location and a detector. The detector has a light emitting means and an image such as a figure, and is arranged at a predetermined angle and distance to the reflecting sheet, and a pattern means for projecting the light on the reflecting sheet by irradiation of light from the light emitting means. A photographing means for photographing the projection of the pattern means reflected by the sheet; a signal processing means for processing a video signal output from the photographing means to convert the image signal into digital data; Recording means for photographing the projection of the pattern means reflected by the sheet by the photographing means, and pre-recording, as reference digital data, digital data obtained by processing the video signal from the photographing means by the signal processing means; After installation, the digital data obtained by photographing the projection of the pattern means reflected by the reflection sheet by the photographing means and processing the video signal from the photographing means by the signal processing means is recorded. A determination unit configured to determine whether to match the reference digital data which is previously recorded in the unit, a display unit according to the determination result by the determining means for displaying the presence or absence of distortion, the light emitting means, the pattern means, imaging means,
There is provided storage means for storing the signal processing means, the recording means, the determination means, and the display means.

The invention according to a sixth aspect of the present invention has been made to solve the above-mentioned problem.
A mark for displaying a Y coordinate, the pattern means has an image such as a figure, and the photographing means is reflected by the mark for displaying the origin or the XY coordinate display of the reflection sheet and the reflection sheet. The recording means captures the image of the pattern means, and the recording means reflects the origin display or XY coordinate display mark and the reflection sheet when the reflection sheet is installed at the distortion detection target location. The image of the pattern means is photographed by the photographing means, and the digital data obtained by processing the video signal from the photographing means by the signal processing means is recorded in advance as reference digital data, and the determining means After the installation at the distortion detection target location, the mark for displaying the origin or the XY coordinate display and the image of the pattern means reflected by the reflection sheet are taken. It is characterized in that it is determined whether or not the digital data obtained by photographing by the means and processing the video signal from the photographing means by the signal processing means matches the reference digital data recorded in the recording means in advance. According to a fifth aspect of the present invention, there is provided a distortion detecting device.

According to the invention described in claim 6, the reflection sheet has a mark for displaying the origin or displaying the XY coordinates.
The patterning means has an image such as a graphic. The shooting means
An origin display mark or XY coordinate display mark of the reflection sheet and an image of the pattern means reflected by the reflection sheet are photographed. The recording means, when the reflection sheet is installed at the distortion detection target location, shoots the mark for displaying the origin or the XY coordinate and the image of the pattern means reflected by the reflection sheet by the photographing means, and images from the photographing means. Digital data obtained by processing the signal by the signal processing means is recorded in advance as reference digital data. The determination means, after the reflection sheet is installed at the distortion detection target location, shoots the mark for displaying the origin or the XY coordinate display and the image of the pattern means reflected by the reflection sheet 11 by the shooting means, and It is determined whether the digital data obtained by processing the video signal by the signal processing unit matches the reference digital data recorded in the recording unit in advance.

According to a seventh aspect of the present invention, there is provided a distortion detecting apparatus according to the fifth aspect, wherein the recording means is detachable from the storage means. Exists.

According to the seventh aspect of the present invention, the recording means is detachable from the storage means.

According to an eighth aspect of the present invention, there is provided an image forming apparatus, wherein the photographing means, the light emitting means, and the pattern means are separated from the storage means to be separate modules, and are provided via a communication means. The distortion detector according to claim 4, wherein the distortion detector is connected to the detector.

According to the eighth aspect of the present invention, the photographing means,
The light emitting means and the pattern means are separated from the storage means to form separate modules, and are connected to the detector via the communication means.

According to a ninth aspect of the present invention, there is provided a light-emitting device for illuminating an image of a graphic or the like directly provided at the distortion detection target position and a mark for displaying an origin or displaying an XY coordinate. Means and an image of the figure or the like and an origin display or an XY coordinate display mark are arranged at a predetermined angle and a distance to the distortion detection target location provided with the mark, and the image of the figure or the like and the origin display or X -Y
Photographing means for photographing a coordinate display mark; signal processing means for processing a video signal output from the photographing means to generate digital data; displaying the image of the figure or the like at the distortion detection target and displaying the origin or X A digital image obtained by photographing the image of the figure or the like and the origin display mark or the XY coordinate display mark by the photographing means and processing the video signal from the photographing means by the signal processing means at the time of setting the Y coordinate display mark; Recording means for pre-recording data as reference digital data; and setting of an image of the figure or the like and an origin display or an XY coordinate display mark at the distortion detection target location, and then displaying the image of the figure or the like or the origin display or X
Whether or not the digital data obtained by photographing the Y coordinate display mark by the photographing means and processing the video signal from the photographing means by the signal processing means matches the reference digital data previously recorded in the recording means; Determining means for determining whether or not there is a distortion according to the determination result by the determining means, the light emitting means, the photographing means, the signal processing means, the recording means, the determining means and the display Storage means for storing the means.

According to the ninth aspect of the present invention, the distortion detecting device comprises: a light emitting means for illuminating an image such as a graphic directly provided at a distortion detection target position and an origin display or XY coordinate display mark; Display of image and origin of figure etc. or X-
A photographing means which is arranged at a predetermined angle and a distance with respect to a distortion detection target position provided with a Y coordinate display mark, and photographs an image of a graphic or the like and an origin display mark or an XY coordinate display mark; A signal processing means for processing the output video signal into digital data, and displaying an image such as a figure and an origin at a distortion detection target or displaying an image of a figure and the origin when a mark for displaying XY coordinates is set. A recording means for photographing the XY coordinate display mark by the photographing means and pre-recording digital data obtained by processing a video signal from the photographing means by the signal processing means as reference digital data; After the image and the mark for displaying the origin or the XY coordinate display are installed, the image of the figure and the mark for displaying the origin or the XY coordinate display are taken by the photographing means. Determining means for determining whether the digital data obtained by processing the video signal from the photographing means by the signal processing means matches the reference digital data recorded in the recording means in advance, and according to the determination result by the determining means. Display means for displaying the presence or absence of distortion, and storage means for storing the light emitting means, photographing means, signal processing means, recording means, determination means and display means.

[0024]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram showing a first embodiment of a distortion detecting device according to the present invention. In FIG. 1, the distortion detection device includes a hologram sheet 1 and a detector 2. The hologram sheet 1 includes, for example, an image composed of one of various images such as characters, symbols, patterns, illustrations, and photographs, or a combination thereof, and a mark for displaying a small origin at an appropriate position on the sheet. Is a sheet recorded by the holographic technique. The detector 2 includes a photographing unit 3,
It comprises components such as a light emitting unit 4, operation switches 5, a CPU 6, a display unit 7, a recording unit 8, a power supply unit 9 and the like, and a case 10 as a storage unit for storing these components.

The photographing means 3 comprises, for example, a CCD camera or the like. The light emitting means 4 includes an LED (light emitting diode),
It consists of a small incandescent light bulb or EL (electroluminescence). The operation switches 5 include a numeric keypad and / or
Or, it comprises a toggle switch or the like. The CPU 6 includes a microprocessor or a microcomputer.
The display means 7 includes an LCD (liquid crystal display), a speaker, and / or a buzzer. The recording means 8 includes a nonvolatile memory, a floppy (registered trademark) disk, a CD-R
(Compact Disk-Recordable) or a magnetic tape. The power supply 9 includes a battery or an AC adapter, and supplies a drive voltage to each component of the detector 2.

The CPU 6 functions as a signal processing unit and a determination unit, and transmits and receives video signals, various control signals, and digital data to and from the photographing unit 3, the light emitting unit 4, the operation switches 5, the display unit 7, and the recording unit 8. Then, the entire operation of the detector 2 is controlled.

The hologram sheet 1 has a characteristic that the display and color of a recorded image change depending on a difference in viewing direction and flatness (distortion). The detector 2 is a hologram sheet 1 serving as a distortion detection device during construction of a structure or during periodic inspection.
Used with

Next, the operation of the distortion detecting device having the above configuration will be described. At the time of using the strain detection device, the hologram sheet 1 is used for a building such as a building, a ship, a bridge, a tunnel, a steel tower,
It is installed by sticking or the like to a distortion detection target portion in other structures.

The detector 2 illuminates the hologram sheet 1 with the light from the light emitting means 4 and also allows the hologram sheet 1 to take an image from the illuminated hologram sheet 1 and a mark for indicating the origin by the photographing means 3. The case 10 is fixed by being supported by a support (not shown) at a position at a certain distance or angle opposite to the case 1.

After the hologram sheet 1 is set and the detector 2 is fixed, the CPU 6 activates the light emitting means 4 and the photographing means 3 in accordance with the operation of the operation switches 5 so that the photographing means 3
The video signal output from the photographing means 3 is taken into the A / D converter 6a as a part of the signal processing means in the CPU 6 on the basis of the image of the hologram sheet 1 photographed in the above and the mark for displaying the origin, and the video signal is The data is converted into digital data, subjected to signal processing, and recorded in the recording means 8. The signal processing of the digital data of the video signal is performed using the origin display mark as the origin data.

The hologram sheet 1 is attached to a separately prepared reference plane and fixed to a position at a fixed distance and angle to the hologram sheet 1 before the hologram sheet 1 is installed at the distortion detection target location. It is photographed by the photographing means 3 in advance, or similarly by the photographing means 3 fixed to a position at a fixed distance or angle opposite to the hologram sheet 1 at the time of installation of the structure at the distortion detection target location. The digital data based on the captured image and the video signal based on the minute mark is recorded in the recording means 7 as reference digital data.

After the hologram sheet 1 is installed at the position of the structure where the distortion is to be detected, the hologram sheet 1 is again placed in the same distance and angle as when the reference digital data is obtained with respect to the hologram sheet 1 in a periodic inspection, for example. Photographing is performed by the photographing means 3 fixed at the position, and the obtained video signal is converted by the A / D converter 6a, signal-processed, and converted into digital data. The position of the digital data is corrected with reference to the mark for displaying the origin. The CPU 6 compares and compares the position-corrected digital data with the reference digital data recorded in the recording means 8.

If the reference digital data and the position-corrected digital data match, the CPU 6 determines that there is no distortion, and determines that there is no distortion by using a numerical value (for example,%), a bar graph, a symbol, a voice or sound. And so on on the display means 7. On the other hand, if the reference digital data and the position-corrected digital data do not match, the CPU 6 determines that there is distortion, and a numerical value (for example,%) indicates how much distortion has occurred according to the amount of data that does not match. , A bar graph, a symbol, a voice, a sound, or the like is displayed on the display means 7.

As described above, the distortion of the hologram sheet 1 is detected, and therefore, the temporal distortion at the distortion detection target portion of the structure on which the hologram sheet 1 is installed can be easily detected.

Further, in this distortion detecting device, since the hologram sheet 1 is a strain gauge, a lead wire and a connector as in the conventional device are not required, and it is accurate and inexpensive.
Further, since the detector 2 compares the accurate digital data whose position has been corrected based on the video signal with the reference digital data, an accurate and inexpensive distortion detecting device can be provided.

Furthermore, since the connection between the hologram sheet 1 and the detector 2 is made by using light as a medium, the detector 2 can be fixed at a position distant from the place where the hologram sheet 1 is installed to a certain extent. Nature can be secured.

The recording means 8 is provided for the case 1 of the detector 2.
It may be configured to be detachable with respect to 0 and inserted into the detector 2 at the time of use. Also, prepare another recording means,
The digital data recorded in the recording means 8 may be copied to another recording means and used as a recording medium.

The photographing means 3 and the light emitting means 4 are connected to the detector 2
May be separated from the case 10 as a separate module and connected to the detector 2 via a connection cord or communication means such as wireless communication. In this case, the above-mentioned another module is attached to the guide rail using a guide rail or the like laid in advance in a building or the like, and automatically operated by a robot or the like while observing a monitor prepared separately at a separate position. Thus, it is possible to observe the hologram sheet 1 as a strain gauge, and it is possible to prevent the danger of the operator. In addition, in the case of such a configuration, it can be used inside a dangerous substance (for example, a nuclear plant), and the operator can monitor outside the dangerous substance.

Further, depending on the application, the metal deposition layer of the hologram sheet 1 is made of gold, so that it is possible to prevent inconsistency of digital data due to a temporal change in dimensions and the like of the hologram sheet 1 itself.

FIG. 2 is a block diagram showing a second embodiment of the distortion detecting device according to the present invention. In FIG. 2, the same components as those in FIG. The distortion detection device includes the reflection sheet 11 and the detector 2. The reflection sheet 11 is a thin sheet that reflects light (including infrared rays and ultraviolet rays). On the reflection sheet 11, a minute mark for indicating the origin or an origin mark indicating the XY coordinates is displayed at an appropriate position in advance. The detector 2 includes components such as a photographing unit 3, a light emitting unit 4, operation switches 5, a CPU 6, a display unit 7, a recording unit 8, a power supply unit 9, a pattern unit 12, and a storage unit for storing these components. And the case 10.

The photographing means 3 comprises, for example, a CCD camera or the like. The light emitting means 4 includes an LED (light emitting diode),
Small incandescent light bulbs, EL (electroluminescence),
It consists of an infrared diode, an infrared lamp, an ultraviolet lamp or the like. The operation switches 5 include a numeric keypad and / or a toggle switch. The CPU 6 includes a microprocessor or a microcomputer. The display means 7 includes an LCD (liquid crystal display), a speaker, and / or a buzzer. The recording means 8 includes a nonvolatile memory, a floppy disk, a CD-R (Compact Disk-R).
ecordable) or magnetic tape. Power supply means 9
Comprises a battery or an AC adapter, and supplies a drive voltage to each component of the detector 2.

The pattern means 12 is a means for transmitting certain images such as figures, characters, symbols, and illustrations by projecting light from the light emitting means 4 and projecting the images on the reflection sheet 11. The image of the above figure etc. was punched out, the image of the above figure etc. was negatively printed on a thin resin plate, or the image of the above figure etc. was printed on a thin resin plate to change the light transmission situation. Or another metal plate stamped with an image such as the above-described figure.

The CPU 6 functions as a signal processing unit and a judgment unit, and transmits and receives video signals, various control signals, and digital data to and from the photographing unit 3, the light emitting unit 4, the operation switches 5, the display unit 7, and the recording unit 8. Then, the entire operation of the detector 2 is controlled.

Next, the operation of the distortion detecting device having the above configuration will be described. When using the strain detecting device, the reflection sheet 11
Is attached to a distortion detection target in a building such as a building, a ship, a bridge, a tunnel, a steel tower, and other structures by, for example, pasting.

The detector 2 projects an image such as a figure from the pattern means 12 onto the reflection sheet 11, and displays an image such as a figure reflected from the reflection sheet 11 and an origin displayed on the reflection sheet 11. Mark or XY
The case 10 is fixed by being supported by a support (not shown) at a position at a certain distance or angle opposite the reflection sheet 11 so that the origin mark indicating the coordinates can be photographed by the photographing means 3.

After the installation of the reflection sheet 11 and the fixing of the detector 2, the CPU 6 activates the light emitting means 4 and the photographing means 3 according to the operation of the operation switches 5. The pattern unit 12 projects an image on the reflection sheet 11 by turning on the light emitting unit 4. An image of a figure or the like reflected from the reflection sheet 11 and an origin display mark or an origin mark indicating XY coordinates on the reflection sheet 11 are photographed by the photographing means 3. Next, an A / D converter 6a as a part of the signal processing means inside the CPU 6 converts an image such as a figure output from the photographing means 3 and a video signal based on an origin display mark or an origin mark indicating XY coordinates. The video signal is converted into predetermined digital data, subjected to signal processing, and recorded in the recording means 8. Note that the signal processing of the digital data of the video signal is performed by using an origin display mark or an XY
An origin mark indicating coordinates is used as origin data.

The reflection sheet 11 is installed at a location where distortion is to be detected during or immediately after the construction of the structure, and is photographed in advance by the photographing means 3 fixed at a fixed distance and angle to the reflection sheet 11. , Digital data based on the captured image and the video signal from the minute mark or origin mark,
It is recorded on the recording means 7 as reference digital data. Further, when there are a plurality of distortion detection target locations, data for identifying the installation location and the installation number is also input from the operation switches 5 and may be included in the reference digital data as related data of the digital data based on the video signal. it can.

Reflection sheet 1 to a portion of a structure to be subjected to distortion detection
After the installation of 1, for example, in the case of a periodic inspection, for example, in a periodic inspection, the light emitting unit 4 and the pattern unit 12 project the origin display mark or the origin mark indicating the XY coordinates onto the reflective sheet 11 again, and The photographing is performed by the photographing means 3 fixed at the same distance and the same angle as when the reference digital data is obtained for the sheet 11, and the obtained video signal is converted by the A / D converter 6a to perform signal processing. Convert to data. The position of the digital data is corrected with reference to an origin display mark or an origin mark indicating XY coordinates. The CPU 6 compares and compares the position-corrected digital data with the reference digital data recorded in the recording means 8.

If the reference digital data and the position-corrected digital data match, the CPU 6 determines that there is no distortion,
The fact that there is no distortion is displayed on the display means 7 by a symbol such as “OK” or a voice. On the other hand, if the reference digital data and the digital data after position correction do not match, C
The PU 6 determines that there is distortion, and displays the degree of distortion according to the amount of data that does not match on the display unit 7 as a numerical value (for example,%), a bar graph, a symbol, a voice or a sound, or the like. .

As described above, it is possible to easily detect the distortion at the position where the distortion is to be detected in the structure on which the reflection sheet 11 is installed. Further, in this distortion detecting device, since the reflection sheet 11 is a strain gauge, a lead wire and a connector as in the conventional device are not required, so that it is accurate and inexpensive. Further, the position correction based on the video signal is performed by the detector 2. Since the accurate digital data is compared with the reference digital data, an accurate and inexpensive distortion detecting device can be provided.

Further, since the connection between the reflection sheet 11 and the detector 2 is made by using light as a medium, the detector 2 can be fixed at a position distant from the place where the reflection sheet 11 is installed to some extent, and the safety of the worker can be secured. Nature can be secured.

The recording means 8 is provided in the case 1 of the detector 2.
0, and may be configured to be inserted into the detector 2 at the time of use. Further, another recording means is prepared,
The digital data recorded in the recording means 8 may be copied to another recording means and used as a recording medium.

Further, the photographing means 3, the light emitting means 4 and the pattern means 12 are separated from the case 10 of the detector 2 to form a separate module, and are connected to the detector 2 via a connection cord or communication means such as wireless communication. Is also good. In this case, the above-mentioned another module is attached to the guide rail using a guide rail or the like laid in advance in a building or the like, and the robot is automatically operated by a robot or the like while observing a monitor prepared separately at a separate position. Thus, it is possible to observe the hologram sheet 1 as a strain gauge, and it is possible to prevent the danger of the operator. Also,
This separate module is for dangerous goods (for example, nuclear plants)
It can also be used inside.

As described above, the embodiment of the present invention has been described. However, the present invention is not limited to this, and various modifications and applications are possible.

For example, instead of the hologram sheet 1 in the first embodiment described above, or the pattern means 12 and the reflection sheet 11 in the second embodiment described above, a certain graphic or the like can be directly applied to a portion of a structure where distortion is to be detected. Images of characters, symbols, illustrations, etc., small marks and XY for origin display
An origin mark indicating coordinates may be displayed in advance. Also in this case, the above-mentioned image and mark directly displayed on the distortion detection target portion of the structure are illuminated with the light from the light emitting means 4, and the original reference digital data based on the video signal photographed by the photographing means 3 and the time of the periodic inspection are used. By comparing digital data, distortion can be detected.

[0057]

According to the distortion detecting device according to the first aspect of the present invention, since the hologram sheet is a strain gauge,
Lead wires and connectors as in the conventional device are not required, and the cost is low. The connection between the hologram sheet and the detector is
Since light is used as the medium, the detector can be fixed at a position somewhat distant from the place where the hologram sheet is installed, and the safety of the worker can be ensured.

According to the distortion detecting apparatus according to the second aspect of the present invention, the accurate digital data whose position has been corrected based on the video signal is compared with the reference digital data, so that accurate distortion detection can be performed.

According to the distortion detecting device according to the third aspect of the present invention, since the recording means is detachable, only the recording means which records the detected distortion data can be carried.

According to the distortion detecting device according to the fourth aspect of the present invention, since the photographing means and the light emitting means are separated from the detector and formed as separate modules, the amount of distortion can be reduced at a location remote from the distortion detection target. It can be observed and workers can work safely.

According to the strain detecting device of the fifth aspect of the present invention, since the reflection sheet is a strain gauge, lead wires and connectors as in the conventional device are not required and the cost is low. Further, since the connection between the reflection sheet and the detector uses light as a medium, the detector can be fixed at a position distant to some extent from the place where the reflection sheet is installed, and the safety of the worker can be secured. .

According to the distortion detecting apparatus according to the second aspect of the present invention, the accurate digital data whose position has been corrected based on the video signal is compared with the reference digital data, thereby enabling accurate distortion detection.

According to the distortion detecting device of the present invention, since the recording means is detachable, only the recording means which records the detected distortion data can be carried.

According to the distortion detecting apparatus of the present invention, since the photographing means and the light emitting means are separated from the detector and formed as separate modules, the amount of distortion can be reduced at a place distant from the distortion detection target. It can be observed and workers can work safely.

According to the distortion detecting apparatus of the ninth aspect, an image such as a figure directly displayed on a distortion detection target portion of a structure and a mark for origin display or XY coordinate display are used. This eliminates the need for lead wires and connectors as in the conventional device, and is inexpensive. In addition, since accurate digital data whose position has been corrected based on a video signal is compared with reference digital data, accurate distortion detection can be performed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a first embodiment of a distortion detection device according to the present invention.

FIG. 2 is a configuration diagram showing a second embodiment of the distortion detection device according to the present invention.

FIG. 3 is a configuration diagram illustrating an example of a conventional distortion detection device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hologram sheet 2 Detector 3 Photographing means 4 Light emitting means 5 Operation switches 6 CPU (signal processing means, judgment means) 7 Display means 8 Recording means 10 Case (storage means) 11 Reflection sheet 12 Patterning means

Claims (9)

[The claims] 1. A hologram sheet provided at a distortion detection target location, and a detector, wherein the detector comprises: a light emitting means for illuminating the hologram sheet; and a predetermined angle and a distance from the hologram sheet. A photographing means arranged for photographing the hologram sheet; a signal processing means for processing a video signal output from the photographing means to convert it into digital data; and before or at the time of installing the hologram sheet at the distortion detection target location Recording means for photographing the hologram sheet by the photographing means and pre-recording digital data obtained by processing the video signal from the photographing means by the signal processing means as reference digital data; and the distortion detection target of the hologram sheet. After installation at the location, the hologram sheet is photographed by the photographing means, and the image is reflected by the photographing means. Determining means for determining whether or not digital data obtained by processing the image signal by the signal processing means matches reference digital data previously recorded in the recording means; Distortion detection, comprising: display means for displaying presence / absence; and storage means for storing the light emitting means, the photographing means, the signal processing means, the recording means, the determination means, and the display means. apparatus. 2. The distortion detecting apparatus according to claim 1, wherein the hologram sheet has an image such as a figure and a mark for displaying an origin. 3. The distortion detecting device according to claim 1, wherein said recording means is detachable from said storage means. 4. The distortion detecting apparatus according to claim 1, wherein the photographing unit and the light emitting unit are separated from the storage unit to form a separate module, and are connected to the detector via a communication unit. apparatus. 5. A reflection sheet provided at a distortion detection target location, and a detector, wherein the detector is configured to project on the reflection sheet by emitting light from the light emitting means and light from the light emitting means. Means, arranged at a predetermined angle and a distance to the reflection sheet, imaging means for imaging the projection of the pattern means reflected by the reflection sheet, and processing a video signal output from the imaging means Signal processing means for converting into digital data, and when the reflection sheet is installed at the distortion detection target location, the projection of the pattern means reflected by the reflection sheet is photographed by the photographing means, and a video signal from the photographing means. Recording means for pre-recording the digital data processed by the signal processing means as reference digital data; and Digital data obtained by photographing the projection of the pattern means reflected by the light source by the photographing means and processing the video signal from the photographing means by the signal processing means is reference digital data previously recorded in the recording means. Determining means for determining whether or not they match, display means for displaying the presence or absence of distortion according to the determination result by the determining means, the light emitting means, the pattern means, the photographing means, the signal processing means, A distortion detecting device comprising: a recording unit; a storage unit that stores the determination unit and the display unit. 6. The reflection sheet is provided with an origin display or an X-ray display.
The pattern means has an image such as a graphic, and the photographing means is reflected by the origin display mark or the XY coordinate display mark of the reflection sheet and the reflection sheet. The recording means captures the image of the pattern means, and the recording means reflects the origin display or XY coordinate display mark and the reflection sheet when the reflection sheet is installed at the distortion detection target location. The image of the pattern means is photographed by the photographing means, and the digital data obtained by processing the video signal from the photographing means by the signal processing means is recorded in advance as reference digital data. After installation at the distortion detection target location, the origin display or XY coordinate display mark and the image of the pattern means reflected by the reflection sheet are taken. Digital data video signal from captured and the photographing means with means and processed by the signal processing means,
6. A method according to claim 5, wherein it is determined whether the reference digital data matches the reference digital data recorded in advance in said recording means.
The distortion detecting device according to the above. 7. The distortion detecting device according to claim 5, wherein said recording means is detachable from said storage means. 8. The apparatus according to claim 5, wherein the photographing unit, the light emitting unit, and the pattern unit are separated from the storage unit to form a separate module, and are connected to the detector via a communication unit. The distortion detecting device according to the above. 9. A light emitting means for illuminating an image of a figure or the like directly provided at the distortion detection target location and a mark for origin display or XY coordinate display; and an image of the figure or the like and origin display or XY A photographing means arranged at a predetermined angle and a distance to the distortion detection target portion provided with the coordinate display mark, and photographing the image of the figure or the like and the origin display mark or the XY coordinate display mark; A signal processing means 6 for processing a video signal output from the means into digital data, and setting the image of the graphic or the like at the distortion detection target and the mark for origin display or XY coordinate display at the time of setting the mark. Digital data obtained by photographing an image such as an image and an origin display mark or an XY coordinate display mark by the photographing means and processing a video signal from the photographing means by the signal processing means. Means for pre-recording the image as reference digital data, and the image of the figure or the like and the display of the origin or the XY coordinate display mark at the distortion detection target location, and then the image of the figure or the like and the display of the origin or the X- Whether or not the digital data obtained by shooting the Y coordinate display mark by the shooting means and processing the video signal from the shooting means by the signal processing means matches the reference digital data recorded in the recording means in advance. Determining means for determining, and displaying means for displaying the presence or absence of distortion according to the determination result by the determining means; the light emitting means, the photographing means, the signal processing means, the recording means, the determining means, and the display means And a storage means for storing the information.