JPH10260141A - Defect inspection apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a defect inspection apparatus in which a demand for continuing a strain for many hours and the overlook of a defect are eliminated and by which a road surface as an object to be inspected can be inspected high reliability by a method wherein the state of the road surface is imaged and the defect on the object to be inspected is detected on the basis of an image obtained in such a way that the objet to be inspected is irradiated, to be in a belt shape, with light from a light source. SOLUTION: A traveling inspection vehicle 1 is run on a road surface as an object to be inspected, and an image 2b by a visible-ray TV camera 2 is displayed on a video monitor 3. At the same time, a temporary storage device 8 is operated in such a way that it stores the image, that the stored image is reproduced so as to be delayed by T1 second and that a new image is overwritten sequentially. As a result, an image 2c which is delayed by T1 second is always supplied to a VTR 4. In addition, an image 5a by incrared rays with which the road surface is irradiated to be in a belt shape from an infrared projector 5 in a position which is higher than the TV camera 2 is imaged by an infrared TV camera 7. An image 7b by the TV camera is displayed on an infrared-image video monitor 31. At this time, a disorder such as a curve, a disconnection or the like which is generated due to a hollow or an uneven part as a road-surface defect 6 in the belt-shaped infrared image 5a is displayed to be in a shape 5b, and it is displayed as the disturbance of infrared rays on the video monitor 31. When the disturbance is reproduced after returning to a base station, the defect can be confirmed easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for inspecting a road surface or a wall surface for defects.

[0002]

2. Description of the Related Art FIG. 9 shows a configuration of a conventional road surface video recording apparatus for the purpose of road surface inspection using VTR recorded video. In the case of the wall surface inspection, the mounting direction is different because the TV camera takes an image of the wall surface, but other than the above, the road surface inspection is the same as the road surface inspection. For convenience of illustration, the patrol inspection vehicle 19 except for the TV camera 2 is used.
However, these devices are actually mounted inside the vehicle. In the figure, 6 is a defect on the road surface, 3 is a video monitor, and 4 is a VTR.

[0003] Defects such as small depressions that have occurred on the road surface of roads progress rapidly on roads with heavy traffic such as the Tokyo Metropolitan Expressway, saying that a depression of 5 cm in diameter expands to 30 cm in one week. Therefore, it is necessary to find it early and arrange for repair. For this reason, the inspector regularly patrols the vehicle on a patrol inspection vehicle. However, workers engaged in simple work that keeps an eye on the work for a long time have great mental and physical fatigue, and the concern of oversight cannot be denied.

As a countermeasure, a patrol vehicle 1 shown in FIG.
9, the road surface 2a of the road is photographed by the visible light TV camera 2 mounted on the roof over the entire distance, displayed on the video monitor 3 and recorded on the VTR 4, and reproduced after returning to the video monitor. There is also an attempt to find the defective portion 6 on the screen of the above. However, in this case, it takes a long time to play the video tape and check the entire process, and even if it is assumed that the speed of the patrol vehicle 1 is 30 km / H, a video monitor of about 5 cm is required. The image of the defective portion 6 at the bean size appears only for about 0.5 seconds on the screen. When shooting at 60 Km / H, which does not affect the running of ordinary vehicles, on the Tokyo Metropolitan Expressway, etc., the appearance time is halved, so that there is a danger of oversight. Further, in order to arrange for the repair worker, it is necessary to extract, dub, and edit the portion where the image of the defective portion is displayed by the above-mentioned visual and manual work.

[0005]

In the conventional method of simply photographing the road surface, recording it on a VTR, and reproducing and observing the road surface, the observer is forced to maintain tension for a long time, and a defect may be overlooked. There was a drawback that easily occurred. SUMMARY OF THE INVENTION An object of the present invention is to provide a highly reliable road surface inspection means by eliminating the drawbacks of long-term tension persistence and oversight that could not be solved by such a conventional method.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method for automatically detecting a defective portion such as a road surface by detecting the defective portion and recording an image near the detected defective portion. An inspection device is provided.

That is, according to the present invention, there are provided means for imaging a condition of a road surface or the like, a belt-like light source for illuminating a test object such as a road surface linearly, a means for detecting an image illuminated by the light source, and A defect detecting means for detecting a defect, an abnormality or the like of the target object from the video, and a signal from the defect detecting means and a video from the means for imaging the road surface condition are recorded in association with each other. is there.

For example, if the recording device is operated only when a defective portion is detected, a search operation can be efficiently performed when searching for the defective portion later.

Further, when a signal from the defect detecting means is recorded on a video tape, for example, together with the image of the condition of the inspection object such as the road surface, the defect detecting means may perform the reproduction even if a high-speed search is performed. When such a signal is detected, an operation such as returning to normal reproduction can be automatically performed, which has a great effect on defect detection.

Further, in the present invention, means for obtaining position information based on latitude, longitude and the like is provided as necessary. By simultaneously recording the position information, accurate information on the defect position can be obtained.

Further, the present invention is characterized in that a defect on the road surface is detected as a defect having a diameter of at least 4 Cm as required. That is, by defining in this way, it is possible to efficiently inspect only road surface defects that may become large defects.

[0012]

Embodiment

First Embodiment FIGS. 1 and 2 show a basic first embodiment of the present invention.
The same components as those in FIG. 9 are denoted by the same reference numerals.

For convenience of illustration, the appearance of the visible light TV camera / infrared TV camera / infrared projector / antenna mounted on the roof of the patrol inspection vehicle 1 is represented in FIG. 2 is shown in the block diagram of FIG.

In FIG. 1, on the roof of the patrol vehicle 1, in addition to the visible light television camera 2 and the infrared television camera 7, there are provided five infrared projectors that radiate a fan shape on the road from a position higher than both cameras. Installed. 90 is GP
1 shows a receiving antenna for an S (Global Positioning System) system.

In FIG. 2, reference numeral 3 denotes a visible light TV camera 2.
Video monitor for displaying video from TV, 8 is visible light TV
A shift register for giving a predetermined delay to the video signal from the camera 2 or a temporary storage device such as a FIFO memory; 9, a GPS device using a known GPS system as an example of a position information receiver; Converts digital data 9x and 9y indicating position information from the position information receiver into analog signals 91x and 91y so that the digital data 9x and 9y can be recorded as normal VTR audio signals.
31 is an infrared image video monitor for displaying an image from the infrared television camera 7, 10 is an image recognition device for detecting a defect on the road surface 2a from the image from the infrared television camera 7, 10
Reference numeral 1 denotes a well-known operation device (so-called remote controller) for manually operating the VTR. 10a is a recording start signal and 10b is a recording pause signal. Reference numeral 4 denotes a VTR, which will be described later in detail, and starts recording a video signal from the visible light TV camera 2 delayed by a predetermined time in the temporary storage device 8 by using a defect detection signal from the image recognition device 10 as a trigger.

FIG. 3 is a diagram showing the timing of starting and stopping the recording of the VTR 4 in relation to the real time.

FIG. 4 shows the image recognition apparatus 10 of FIG. 2 in more detail. The image recognition device 10 is mainly configured by a microprocessor 111. In the figure, each function is represented in the form of a hardware block.
Of course, each of these blocks may be a software function of the microprocessor 111. In the figure, reference numeral 110 denotes an image recognition / measurement unit, and 112 denotes a VTR.
The control unit has a data comparison block 114, a one-second delay block 115, a timing block 113, and a switch block 116.

Next, this operation will be described.

The traveling inspection vehicle 1 runs on a road to be inspected at a predetermined speed. At this time, the image 2b of the visible light TV camera 2 is displayed on the video monitor 3 and simultaneously stored in the temporary storage device 8, and further transmitted to the VTR 4 stopped in the recording standby state. The temporary storage device 8 stores T1
Since there is a capacity capable of storing seconds, and the stored video is played back with a delay of T1 second and the new video is successively overwritten, the VTR 4 is always supplied with the video 2c delayed by T1 second. This T1 second is, for example, 3 seconds excluding the activation time of the VTR 4. In the following description, it is assumed that there is no VTR operation delay. That is, in general, a VTR requires several seconds or more from the recording start instruction operation to the actual recording start. However, in this description, in order to clarify the purpose of the embodiment and facilitate understanding, Description will be made with the time set to zero.

The infrared image 5 a radiated from the infrared projector 5 to the road surface in a belt shape is picked up by the infrared television camera 7. The image 7b from the infrared television camera 7 is displayed on the infrared image video monitor 31 and sent to the image recognition device 10 at the same time.

FIG. 5 shows an example A of the sinking defect 6 and an image B on the video monitor 31. Disturbances such as a curve caused by the depression of the depression 6 on the road surface caused by the infrared band 5a irradiated on the road and a discontinuity caused by unevenness in the depression have a shape like 5b. Note that, in FIG.
Is actually thicker than shown. For example, assuming that the lateral field of view is about 4 m, for example, a defective portion of 4 cm has a width of one screen.
/ 100, but for convenience of explanation, FIG.
The expression was enlarged to about 10. 5a 'indicates an infrared image on the monitor and 5b' indicates disturbance or undulation of the infrared image on the monitor. Note that cd shown on the monitor screen is provided to explain the correspondence between the road surface defect state A and the infrared image B.

A description will be given below with reference to FIGS. 2, 3 and 4.

The image recognition measuring section 110 of the image recognition apparatus 10
Automatically recognizes the road surface defect location 6, automatically measures the defect size, and sends a defect detection signal to the VTR control unit 112 if the defect size is equal to or larger than a predetermined size (for example, 4 cm or more). Then, it is transmitted to the VTR 4 as a recording start signal 10a. In this embodiment, the image recognizing apparatus 10 uses a well-known defect recognition method using light cutting (for example, Japanese Patent Publication No. 55-48454, Japanese Patent Laid-Open No. 1-295).
104 etc.). In this case, if the angle between the optical axis of the infrared television camera 7 and that of the infrared projector 5 with respect to the subject (that is, the road surface) is farther away, the difference between the defect (that is, the hole) and the normal road surface will be more apparent. It should be noted that the time required for automatic defect recognition by detecting the light cutting line in the image recognition device 110 is negligibly small.

Also, the GPS longitude information and the latitude information digital signals 9x and 9y of the photographing position obtained from the GPS device 9 are obtained.
Are converted into analog signals after a delay of T1 seconds by a DA converter 15 having a built-in delay function, and are converted into analog signals 91x and 91y of the longitude and latitude of the shooting position delayed by T1 seconds, and the left and right audio channels L and R of the VTR 4 are output. Supplied to In this way, the image of the defective part and the photographing position information are recorded on the same video tape. Note that the accuracy of positional information obtained by GPS is very high, as is well known, and is sufficient as positional information for implementing the present invention.

The VTR 4 that has started recording has a T for detecting a defect.
After 2 seconds (for example, after 6 seconds excluding VTR4 startup time)
Recording pause signal 10b sent from the image recognition device 10
Returns to the recording standby state. This T2 second is measured by the timing block 113, and during this time (that is, T2
If the defect is detected again during (seconds), the timing block 113 is reset and the measurement is started again. The subsequent operation is the same. The operation device 101 has a function of manually transmitting the recording start signal 10a and the recording pause signal 10b to the VTR 4, and is used when the driver or the passenger of the patrol vehicle 1 temporarily performs a recording operation.

The operation timing of the VTR 4 with respect to the real time T is as shown in FIG. 3, where 0 second of the real time is the time of detection of a defect, 2c is a video signal delayed by the temporary storage device 8, and 91 is D / D. The position information signals 91x and 91y delayed by the A-converter 15 are conceptually shown, and the numerical values shown in the figure indicate the time corresponding to the real time T when the event occurs. In this manner, the VTR 4 has the television camera 2 for 3 seconds before the detection and 3 seconds after the detection around the defect detection time 0.
From the road surface and location information are recorded.

As described above, in the VTR 4, the image recognition device 10 automatically recognizes the road surface defect portion 6 from T1 seconds before T2.
-The image 2c of the road surface 2a including the defective portion 6 delayed by T1 seconds and the D / A-converted shooting position information 91x until T1 seconds later,
The operation of recording 91y is repeated. On the other hand, when the position information 9x, 9y from the GPS device 9 is not updated for a predetermined time (for example, one second or more), it is determined that the patrol car 1 is stopped, and the image recognition device 10 sends the recording pause signal 10b. I do. Upon receiving the recording pause signal 10b, the VTR 4 pauses. With reference to FIG. 4, how the recording pause signal is generated will be described. The position information from the GPS device 9 includes a one-second delay block 115 and a data comparison block 1
Input to 14. In the data comparison block 114, the data one second before is compared with the current data. If there is no change in the data of the position information, the recording pause signal 10b is supplied to the switch block 116 and the VTR4. In response, VTR4
Pauses. On the other hand, if the stopped position is a defective portion, a defect detection signal is output from the image recognition / measurement unit 110, so that the switch block 116 is controlled by the recording pause signal 10 b from the data comparison block 114 (ie, OFF). Then, the defect detection signal is stopped. If the patrol inspection vehicle 1 starts moving and the position information changes, the recording pause signal 10b from the data comparison block 114 is not output, so that the vehicle returns to the recordable state. Timing block 113
When a new recording start signal 10a arrives during recording, the recording pause command time T2 is counted from the arrival of the new recording start signal 10a as described above. In this embodiment, the time T1 is set to 3 seconds and the time T2 is set to 6 seconds.
The optimal value is set according to the situation, since it differs depending on the minimum size of.

In the first embodiment described above, the road surface condition is recorded only when the video tape has a defect, so that the tape can be used without waste. Also, it is possible to save the reproduction time at the time of the reproduction search.

When photographing the road surface 2a including the defective portion 6 from the patrol vehicle 1 traveling at a high speed, the traveling distance in the accumulation time of the image pickup devices (not shown) of the TV cameras 2 and 7 is taken as an object. If it is larger than the defect location 6, the defect location 6 cannot be captured as an image. Therefore, the accumulation time of the image sensor corresponding to the traveling speed of the patrol vehicle 1 is set according to the minimum size (for example, 4 cm) of the defect portion 6 to be detected in the image sensor of the visible light TV camera 2 and the infrared TV camera 7. Means may be provided.

In this embodiment, the detected position is simultaneously recorded by using the position detecting device by GPS. However, for example, the angle of view of the visible light camera is widened.
If an image other than the road surface is captured, the position information is not necessarily required. Further, a TV camera for photographing surrounding conditions other than the road surface may be separately provided, and this image may be combined with the road surface image. For example, there are kiloposts every 100 m on a highway, and if this is recorded by a television camera, it can be used as a guide for the photographing position. Therefore, in this case, the position information receiver 9 such as a GPS and the DA converter 15 become unnecessary, and a low-cost apparatus configuration can be realized. In this embodiment, the position information is described as being obtained from a known GPS device. However, for example, ITS (Intelligen
When tTransportSystem) is put into practical use, location information can be obtained from devices on the roadside on expressways.

Second Embodiment FIG. 6 shows another second embodiment of the present invention.
The same reference numerals are given to the same components as in the first embodiment, and the appearance features of the patrol vehicle are common to those of the first embodiment. Therefore, the description of the parts common to the first embodiment related to FIG. 1 will be omitted.

In FIG. 6, the point that the image 2b of the road surface condition and the photographing position information 9x and 9y are supplied to the VTR 4 and the point that the defective portion is automatically recognized by the image recognizing means using the image of the infrared camera 7 are as follows. Same as Example 1 but with 15
1 is a D / A converter having no delay element. In this embodiment, the image recognition device does not need to have the same configuration as that of the first embodiment, and only needs to have the image recognition measurement unit 110 in the image recognition device 10 of FIG. In this embodiment, VT
R4 starts recording in response to a recording start signal 10a manually transmitted from the operation device 101, and continues recording until a manual recording pause signal 10b is transmitted. That is,
While the traveling inspection vehicle 1 is traveling on the road to be inspected, basically, the VTR 4 is not stopped and the road surface image is recorded continuously.
During this time, when the defect is automatically recognized by the image recognition device 110, the defect detection signal 10c is converted into a known so-called “start signal” by VISS (VHS In) of the VTR 4.
dexSearch System) circuit (or digital index and skip search function)
It is recorded on a video tape as a signal. In this case, VT
Since R4 continuously records a video signal, there is no need to delay the video signal 2b and the position information 9x and 9y, and it is recorded on the video tape simultaneously with the VISS signal.

The VISS circuit (not shown) in the well-known VTR 4 automatically searches for the VISS signal on the tape at a high speed in the "fast forward" or "rewind" mode, and automatically "plays back" when the VISS signal is detected. Performs the function of switching to the mode. Therefore, by recording this signal on a video tape, the VISS signal can start playback from that part when the VTR detects this even if the tape is fast-forwarded or played back at high speed during playback. Search operations can be performed efficiently. At this time,
In particular, in the case of “fast forward”, the point where playback starts
Depending on the model or response, the position of the defect may be slightly past, but it is possible to sufficiently cope with a slight "rewind".

In the case of this embodiment, the storage device 8 for the delay becomes unnecessary, and the position information does not need to be delayed, so that the D / A converter 151 having no delay element can be used. When the defective portion 6 is confirmed on the screen of the video monitor while playing back the recorded tape after returning to the home, it can be confirmed by repeatedly operating the playback VTR with the VISS function. Further, if only the video near the defective portion 6 displayed in the "playback" mode is used in slow reproduction, a still function, and the like, the road surface condition can be closely inspected. In addition, since the tape is automatically fed to the unnecessary portion in the "fast forward" or "rewind" mode, the checking operation can be completed in an extremely short time. In this embodiment, since the road condition other than the defect detection location is also recorded, there is an advantage that it can be confirmed as necessary after returning home.

In this embodiment, basically, it is not necessary to provide a delay to the defect detection signal for both the road surface image and the position information signal. The delay means described in the embodiment of
Alternatively, a simpler delay means may be provided.

Third Embodiment FIG. 7 shows a third embodiment of the present invention. The same components as those in FIGS. 1 and 2 are denoted by the same reference numerals, and FIGS.
The description of the same parts as those of the first embodiment will be omitted. In FIG. 1, a visible light TV camera 11 is attached to the rear of the roof of the patrol vehicle 1, and photographs a rear road surface 11a as illustrated.

The image 11b of the visible light TV camera 11 is displayed on the video monitor 12 and, at the same time, is temporarily stored in the temporary storage device 1.
3, the VTR 14 stopped in the recording standby state
Sent to The temporary storage device 13 has a capacity capable of storing T1 seconds (for example, 3 seconds excluding the start-up time of the VTR 14), and operates so as to sequentially overwrite new images while reproducing the stored images with a delay of T1 seconds. So, VTR
14 is supplied with an image 12c delayed by T1 second. When the image recognition device 10 automatically recognizes a road surface defect portion 6 having a predetermined size or more, a recording start signal 10a is sent to the VTR 4 as well as to the VTR 14. Further, the position signals 9x and 9y delayed by T1 seconds are also converted into analog signals 91x and 91y and supplied to the VTR 14, and are returned to the photographing position information and used during reproduction. The VTR 14 that has started recording is T2
After a few seconds (for example, six seconds after excluding the activation time of the VTR 14), the system is returned to the recording standby state by the recording pause signal 10b sent from the image recognition device 10. 101 is a VTR
4 and 14 operating devices.

With the above operation, in addition to the image of the front view of the VTR 4, the VTR 14 has a delay of T1 from T1 seconds before (T2−T1) seconds after the image recognition device 10 automatically recognizes the road surface defect point 6. The operation of recording the image of the road surface 11a including the defective portion 6 and the photographing position information 9b is repeated. Here, measures when the patrol inspection vehicle 1 is stopped or when a new recording start signal 10a arrives during recording are the same as those in the first embodiment.

For convenience of explanation, in this embodiment, VTR4 and VTR4
Although the TR 14 has been described as a separate device, if a VTR of a system capable of simultaneously recording two systems of video and audio on one tape is used, it includes the approaching defect portion 6 viewed from the front TV camera 2. The image of the road surface 2a and the road surface 11 including the defect part 6 moving away from the TV camera 11 as seen from the rear.
Since the image of a can be recorded and reproduced with a slight time difference when the patrol inspection vehicle passes from the road surface 2a to the road surface 2b, the confirmation after returning to home is more reliable. In this embodiment, the image of the front camera and the image of the rear camera recorded with a slight time difference are opposite in the angle of the sunshine or night illumination even when the defective portion 6 is difficult to see depending on the angle of the sunshine or nighttime illumination. This has the advantage that visual recognition is assured.

The images of the front camera and the rear camera are
So that it can be recorded on videotape simultaneously with the ISS signal,
As in the second embodiment, a device for delaying a signal can be omitted.

Embodiment of Retrieval Apparatus Here, the retrieval apparatus will be described with reference to FIG. In the figure, 81 is a video tape recorder for reproduction, 82 is a monitor for displaying images, 83 is an AD converter, 84 is a GP.
The S device 85 is a map display monitor of the GPS device.

As described above, in each embodiment, the video tape on which the image of the defective portion and the photographing position information are recorded is:
At the time of reproduction, it is reproduced by the reproduction VTR 81. The reproduced video is displayed on the screen of the video monitor 82. On the other hand, since the position information is recorded in the audio channel of the video tape, the left and right (stereo) audio analog signal outputs are returned by the AD converter 83 to digital signals equivalent to the longitude information of the shooting position and the latitude information 9x, 9y. Well-known GPS
Via the device 84, it is displayed on the map display monitor together with the map screen as a defective portion. In this way, the defective portion can be clearly confirmed together with the image of the defective portion obtained from the video tape recorder 81 for reproduction.

Regarding the detection of a defect on a road surface, it is very important to determine the size of the defect to be detected. In this regard, in the present embodiment, a depression of 4 cm or more is detected. For example, when the distance is 4 cm or less, for example, about 3 cm, it takes time for the defect to become a large defect, and it may not expand further depending on the road surface condition and traffic volume. On the other hand, it exceeds 4 cm and the defect size is 4.5.
If it exceeds ５5 cm, the size increases rapidly and the depth increases, which is dangerous. Therefore, it is absolutely necessary to detect a defect of 5 cm or more, and it is necessary to detect a defect of 4 cm or more on a road with heavy traffic as much as possible. Therefore, in the example of the present invention, 4 cm was set as the boundary line. For example, the number of defects of 3 cm or less becomes extremely large, and detection of such small defects is not practical.

In this embodiment, for the sake of convenience of explanation, the method of automatically recognizing a defect on a road surface is exemplified by a system using a visible light TV camera, a flat infrared projector and an infrared camera in combination. However, various TV cameras including a line sensor camera are used. It is needless to say that a system utilizing all or a part of the video or another automatic recognition algorithm can be used.

In the above description, the light for detecting a defect is infrared light. However, the light is not limited to infrared light, and a laser beam may be scanned. The planar infrared light may be converted into an equal band-like planar light by scanning a point light source. The reason for using infrared light in each of the above embodiments is that it is difficult to distinguish visible light from natural light and artificial light. If the wavelength of infrared light is 850 nm or more, visible light is applied to the lens of the infrared camera. By installing an infrared filter that completely blocks out, it is possible to obtain an image of only the irradiated infrared band on the road.

For convenience of comparison with the prior art, a VTR is shown as an example of a recording / recording apparatus, but it goes without saying that other recording media such as a hard disk, an optical disk, and an FD are also within the scope of the present invention. .

In the above description, the light cutting method is used for the defect detection, but the defect can be detected by image recognition without using this method. For example, in the light cutting method, a slit light is usually applied to a target object from an oblique position, and an image of the slit light is often taken from directly above. However, such a device is installed on a vehicle as in the present invention. It is difficult to take an arrangement. However, a defect on a road (typically a hole) can be detected by a very simple algorithm because the light image appears to be interrupted even when the position of the light source and the imaging device are close. That is, the light cutting method is not an essential requirement of the present invention.

In this embodiment, the application to the road surface has been exemplified. However, it is needless to say that the present invention can also be applied to the inspection of river shore protection, railway lines, overhead lines, and the like.

[0049]

By using the recorded image according to the present invention and performing the operation of confirming the defective portion on the screen of the video monitor while reproducing the image after returning to the home, the defective portion has already been identified. It is easy to use, and unlike the case where a defect is found from an image obtained by simply photographing the road surface condition, the tension duration is almost eliminated. Therefore, no oversight of defects occurs. In addition, since the photographing position information of the defective spot and the image of the spot are also accurate, arrangement for the repair operator is simple and thorough. In addition, when the position information device is mounted, highly accurate position information can be obtained, and arrangements for repair workers are more accurate and thorough.

For convenience of comparison with the prior art, in the above-described embodiment, the apparatus is mounted on a "tour inspection vehicle" and travels exclusively for defect detection. However, according to the present invention, the inspection worker There is no need to get on the vehicle, so that it is of course possible to record during patrol traveling which also serves as general road patrol.

In the present invention, in actual operation, it may be difficult to automatically discriminate between dirt on the road surface and a shallow defect. However, the suspicion is recorded and the final judgment is left to human eyes. Use is also possible.

[Brief description of the drawings]

FIG. 1 is a configuration external view for explaining an embodiment of the present invention.

FIG. 2 is a block diagram of one embodiment of the present invention.

FIG. 3 is an operation timing chart of one embodiment of the present invention.

FIG. 4 is a block diagram of an operation device according to an embodiment of the present invention.

FIG. 5 is an explanatory view of one embodiment of the present invention.

FIG. 6 is a block diagram of one embodiment of the present invention.

FIG. 7 is a block diagram of one embodiment of the present invention.

FIG. 8 is a configuration block diagram of an embodiment of the present invention.

FIG. 9 is an explanatory configuration diagram of a conventional example.

[Explanation of symbols]

1,19 patrol car, 2 visible light TV camera, 2a
Road surface photographed by visible light TV camera, 3 video monitor, 4 and 14 VTR, 5 infrared projector, 5a band of infrared ray irradiated on road surface, 6 road surface defect, 7 infrared ray T
V camera, 8, 13 temporary storage device, 9 GPS device, 10 image recognition device, 11 visible light TV camera,
12 video monitor, 15 DA converter, 31 infrared image video monitor, 90 antenna, 101 VTR
Operation device, 110 image recognition measurement unit

Claims (10)

[Claims] An apparatus for inspecting a defect while moving in the vicinity of an object to be inspected, means for irradiating the object to be inspected with a planar light beam, and an object to be inspected irradiated by the planar light beam First imaging means for imaging reflected light from the object, means for detecting a defect to be inspected from an image from the first imaging means, and a portion of the inspection object illuminated by the planar light beam irradiating means 1. A defect inspection apparatus comprising: a second imaging unit that captures an image including a video signal; and a recording unit that records a video signal obtained by the second imaging unit. 2. A defect inspection apparatus for inspecting a defect while moving in the vicinity of an object to be inspected, means for obtaining position information of the defect inspection apparatus, and means for irradiating the object to be inspected with a plane light beam. First imaging means for imaging reflected light from the inspection object irradiated by the planar light beam, means for detecting a defect of the inspection object from an image from the first imaging means, A second imaging unit that captures an image including a portion to be inspected illuminated by the irradiating unit, and a video signal obtained by the second imaging unit and position information obtained from the position information obtaining unit. A defect inspection apparatus comprising: a recording unit that records data at the same time. 3. A defect inspection apparatus according to claim 1, wherein said recording means responds to a defect detection signal from said defect detection means and performs a recording operation at least when a defect is detected. 4. The recording means according to claim 1, wherein said defect detection signal from said defect detection means is recorded simultaneously with recording of an image including a portion to be inspected from said second imaging means. A defect inspection apparatus characterized by the above-mentioned. 5. The defect inspection apparatus according to claim 1, wherein the planar light beam is an infrared light beam. 6. The defect inspection apparatus according to claim 1 or 2, wherein the defect inspection apparatus is mounted on a moving vehicle, and the inspection target is a defect on a road surface, and records road surface data while moving on the road. Road surface defect inspection equipment. 7. A road surface defect inspection apparatus according to claim 6, wherein at least a defect having a diameter of at least 4 cm is detected as a defect. 8. A defect inspection apparatus for inspecting a defect on a road surface while moving near a road surface, a means for obtaining position information of the defect inspection apparatus, and a width covering the inspection object on the road surface to be inspected. Means for irradiating a planar light beam having, a planar light image capturing means for imaging reflected light from the inspection target road surface irradiated by the planar light beam, and an image of the inspection target road surface from an image from the planar light image capturing means. Means for detecting a defect, means for imaging visible light for capturing an image including the portion to be inspected illuminated by the means for illuminating the planar light beam, and means for obtaining position information of the defect inspection apparatus moving on the road surface A defect inspection apparatus, comprising: recording means for simultaneously recording position information from the camera, a video signal obtained by the visible light imaging means, and a defect detection signal from the defect detection means. 9. A defect inspection apparatus mounted on a patrol vehicle for inspecting defects on a road surface while moving on a road surface,
Means for obtaining position information of the defect inspection apparatus, and means for irradiating a planar light beam having a width covering the inspection target on the road surface of the inspection target provided on the front upper part of the patrol vehicle,
In the vicinity of the means for irradiating the planar light beam on the patrol vehicle, and the optical axis thereof is provided at an angle different from the optical axis of the means for irradiating the planar light beam, and the inspection object irradiated by the planar light beam Imaging means for receiving a reflected light from a road surface; a means for detecting a defect on a road surface to be inspected from an image from the imaging means; and A means for providing visible light which is provided in the vicinity of the imaging means and which captures an image including a portion to be inspected illuminated by the means for irradiating the planar light; and means for obtaining position information of the defect inspection apparatus moving on the road surface Recording means for simultaneously recording position information from the camera, a video signal obtained by the visible light imaging means, and a defect detection signal from the defect detection means, or starting recording by detecting the detection signal. Defect inspection apparatus according to claim. 10. A defect inspection apparatus for inspecting a defect while moving in the vicinity of an object to be inspected, means for obtaining position information of the defect inspection apparatus, and means for irradiating the object to be inspected with a plane light beam. A first image capturing reflected light from the inspection object irradiated by the planar light beam;
Imaging means, means for detecting a defect to be inspected from an image from the first imaging means, and second imaging for capturing an image including a part of the inspection object illuminated by the plane light beam irradiating means. An on-vehicle recording device comprising: a VTR for simultaneously recording, on a video tape, a video signal obtained by the second imaging means and position information obtained by the means for obtaining the position information; and recording by the VTR. A VTR for reproduction for reproducing the reproduced video tape, a monitor for displaying images reproduced by the VTR for reproduction, and a search device having display means for displaying position information reproduced by the VTR for reproduction. A defect inspection apparatus characterized by having.