JPH0545121A - Inspecting apparatus of moving body - Google Patents

Abstract

PURPOSE:To make it possible to record and reproduce both image data and motion data on a moving body in correlation with each other. CONSTITUTION:An image data signal of a camera 6 picking up an image of a moving body l is recorded on an image recording band of a video tape 18 through the intermediary of an image signal element 7 and an image input element 12. Meanwhile, a rotational angle measuring element 4 measures a rotational angle from the number of pulses sent from a rotary encoder 3, and a rotational angle input element 5 sends pulse signal data to a speech input element 16. At this time, each digit of pulse signal data is matched with a horizontal sync signal. A rotational angle data signal from the speech input element 16 is recorded on a speech recording band corresponding to the image recording band whereon an image data signal is recorded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to an automatic inspection of a moving body utilizing image processing, and uses an image recording medium such as a video tape, an image memory or an optical disk to provide a large number of images of a plurality of inspection targets. The present invention relates to a moving body inspection device that temporarily records data and its motion data, and then collects and automatically inspects them with a small number of image processing devices. The present invention relates to a moving body inspection apparatus suitable for intensive and automatic inspection of the dimension measurement of the projected image of the image recording medium and a small number of image processing apparatuses.

[0002]

2. Description of the Related Art Conventionally, in general, when an image at a specific value (for example, velocity, displacement, individual number, etc.) of motion data of a moving body is inspected, it is necessary to identify what kind of motion data the screen accompanies. , A screen displaying motion data for human reading in the corner of the screen is temporarily recorded in an image recording medium, and during inspection, a still image is created on the screen that the human wants to inspect while playing the image, and it is displayed in the corner of the screen. It has been practiced that a person reads the motion data, and the motion data is keyed into the image processing apparatus for inspection.

Further, as a characteristic prior art, Japanese Patent Laid-Open No. 2-
There is "Outdoor automatic monitoring device" of No. 56096. this is,
After shooting an enemy battleship with a TV camera in a navy battle, the battleship image is identified by an image processing device, the battleship image is displayed on the display, and the bearing, ship type, nationality, etc. are automatically output to a recorder. It was done.

Another example of the characteristic prior art is the "electronic still camera" of Japanese Patent Laid-Open No. 60-213183. This is an electronic still camera that records a screen image on a built-in sheet-shaped magnetic recording medium, the background sound at the time of image capturing, and a sync signal with the screen on a cassette tape deck installed side by side, and monitors as necessary. The background audio is output from the cassette tape deck to the TV, and still images are output frame by frame from the magnetic recording medium of the camera body in response to a synchronizing signal with a screen recorded in the middle of the background audio. Furthermore, when transferring the screen of this still camera and the background sound at the time of shooting to a video tape, in addition to the normal use of the video tape, the synchronization signal with the screen is recorded at an appropriate position on the video tape and then stopped. The purpose is to advance the frame by frame.

As described above, a technique for simultaneously displaying predetermined motion data as character information on the screen together with an image of a moving body is gradually attracting attention. When performing a wear inspection of the wheels of a railroad vehicle, it takes a lot of labor and time to check the wear degree by applying a predetermined pattern to each of a large number of wheels and measuring the gap size between them. Therefore, the above-mentioned image processing technology is being applied. In other words, while the train is running, the outer shape of the wheel is imaged, and the wheel wear amount is calculated by measuring the dimensions of this projected image.

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The "Outdoor Automatic Monitoring Device" of No. 096 aims to automatically output the result of image processing to a display and a recording device, and this system collects a large number of image data of multiple inspection targets and its motion data. If processing is to be performed, it is necessary to install this system for each inspection object, so that there is a drawback that the entire inspection apparatus becomes very expensive.

On the other hand, the "electronic still camera" of Japanese Patent Application Laid-Open No. 60-213183 records an imaged screen, a background sound at the time of imaging, and a synchronizing signal with the screen, and outputs them to the outside as necessary. Although it is possible to record a synchronization signal with the screen in the audio recording unit, basically it is not possible to record exercise data here for the purpose of recording background sound.
In addition, it is impossible to automatically inspect an arbitrary motion state of a moving body from continuously captured images.

Also in the above-mentioned wear inspection of the wheels of the railway vehicle, the work of extracting an image of a specific wheel from a plurality of wheels must be performed manually. Further, there is a problem that it takes a lot of labor and time for the operator to read the motion data displayed on the extracted screen and then to key in the image data into the image processing apparatus.

The present invention has been made in view of the above circumstances, and it is possible to continuously capture the motion state of a moving body such as a wheel of a railway vehicle while having an inexpensive structure, and to obtain both image data and motion data. An object of the present invention is to provide a moving body inspection apparatus capable of recording / reproducing in association with each other.

[0010]

As a means for solving the above-mentioned problems, the present invention records image data relating to the motion condition of a moving body in an image recording medium, and at the time of reproducing this recording, the image of the moving body is recorded. At the same time, in a moving body inspection apparatus that displays necessary character information on the screen of the display device and performs a predetermined inspection on this moving body, a camera that captures the movement state of the moving body and movement data of the moving body are displayed. In the recording mode, the motion data detecting means for detecting and recording the image data signal from the camera and the motion data signal from the motion data detecting means in the image recording medium in synchronization with each other, and in the reproducing mode, Data signal recording / reproducing means for extracting the image data signal and the motion data signal corresponding thereto from the recording of the image recording medium A.

[0011]

In the above construction, in the recording mode, the image data signal from the camera for photographing the motion condition of the moving body is inputted to the data signal recording / reproducing means, and the motion data signal from the motion data detecting means is also recorded as the data signal. -It is input to the playback means. The data signal recording / reproducing means records these signals on the image recording medium in synchronization with each other.

In the reproduction mode, the data signal recording / reproducing means can extract the image data signal and the motion data signal corresponding thereto from the recording on the image recording medium. Therefore, the image of the moving body can be displayed together with the motion data, and further, both the image data and the motion data can be input to the computer for analysis if necessary.

[0013]

Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram showing the configuration of the first embodiment of the present invention.

In this figure, the moving body 1 is driven by a motor 2, and its rotation angle is detected by a rotary encoder 3. That is, when the rotary encoder 3 emits a pulse, the rotation angle measurement unit 4 converts the number of pulses into a rotation angle and outputs the signal to the rotation angle input unit 5 as a hexadecimal number, for example.

On the other hand, the CCD camera 6 picks up an image of the moving state of the moving body 1, and the output signals thereof are passed through an image signal section 7, a vertical synchronizing signal section 8, a horizontal synchronizing signal section 9 and a clock signal section 10, respectively. It is adapted to be sent to the image input unit 12, the vertical synchronization signal input unit 13, the horizontal synchronization signal input unit 14, and the clock signal input unit 15 of the image recording device 11.

The rotation angle input unit 5 converts the hexadecimal number signal from the rotation angle measurement unit 4 into a pulse train (for example, a binary coded hexadecimal number) that can be identified by the signals from the vertical synchronization signal unit 8 and the horizontal synchronization signal unit 9. The image is converted and output to the audio input unit 16 of the image recording device 11.

Then, the image data signal from the image input section 12 and the rotation angle signal (motion data signal) from the audio output section 16 are sent to the video tape recording / reproducing section 17 so as to be synchronized with each other. The signal is videotape 18
Recorded in.

During reproduction, the video tape recording / reproducing unit 17 separately outputs the image data signal and the rotation angle signal from the video tape 18, the image output unit 19 and the audio output unit 20.
The image is transmitted to the image processing device 21 and the rotation angle output unit 22 via the.

Both of these signals are supplied to the vertical synchronizing signal output section 2
3, horizontal synchronization signal output unit 24, clock signal output unit 25
The signals are synchronized with each other and displayed on the display 26 or output to the main computer 27 for analysis.

FIG. 2 shows an image taken by the CCD camera 6,
It is what is displayed on the screen of the TV monitor which is a display unit.
The scanning line (500 lines) 100 has a vertical synchronizing signal 101 and a horizontal synchronizing signal 102.

As shown in FIG. 3, the vertical synchronizing signal 101 functions as a screen switching mark, and is marked at the beginning of each screen. The horizontal synchronizing signal 102 functions as a switching mark for the scanning lines 100, and is marked at the beginning of each scanning line. Further, the two horizontal synchronizing signals are equally divided by the clock signal 103, and the image signal 104 extracted from each pixel of the CCD camera 6 is the clock signal 103.
It has been synchronized with.

FIG. 4 uses the horizontal sync signal 102 to
It is explanatory drawing about the procedure of producing the pulse signal regarding a rotation angle. That is, since there is a scanning line switching mark of the horizontal synchronizing signal 102 at each tip of the 500 scanning lines 100, the rotation angle measuring unit 4 uses the hexadecimal data of the rotation angle, for example, “4”.
8H ”is output.

Then, the rotation angle input unit 5 converts this data into a binary coded hexadecimal pulse train "00100100", aligns the pulse of the vertical synchronizing signal 101 with the head, and converts the rotation angle data into each pulse of the horizontal synchronizing signal 102. "00100
Match each digit of "100". The pulse signal data thus created is input as an electric signal from the audio input unit 16 of the image recording device (commonly called a video deck) 11, and the video tape recording / playback unit 17 outputs the image data from the image input unit 19. Video tape 18 synchronized with the signal
Will be recorded in the voice recording zone.

In the case of reproducing, the video tape recording / reproducing unit 17 outputs the image data and the rotation angle data from the rewound video tape 18 via the image output unit 19 and the audio output unit 20. 21 and the rotation angle output unit 22.

That is, due to an action opposite to that at the time of recording, the voice output unit 20 outputs the pulse signal data of the rotation angle to the rotation angle output unit 22, and the rotation angle output unit 22 outputs 1 pulse signal data.
The hexadecimal data is output to the main computer 27. On the other hand, an image data signal is output from the image output unit 19,
The image processing device 21 outputs the image data signal to the main computer 27, and displays the image data together with the rotation angle data on the screen of the display 26.

The main computer 27 performs a predetermined inspection based on these data and outputs the inspection result.

FIG. 5 is an explanatory diagram showing a correspondence relationship between image data and rotation angle data regarding the moving body 1. If the resolution of the rotary encoder 3 is 5 °, the hexadecimal data of the rotation angle measurement unit 4 is 0 ° → 0H, 5 ° → 1H, 10 °.
→ 2H, 15 ° → 3H, 20 ° → 4H, 25 ° → 5H,
… 120 ° → 24H,… 240 ° → 48H,… 355 °
→ 71H, 360 ° → 0H.

Assuming that the moving body 1 has a property of being appropriately expanded by a centrifugal force when it is rotated by the motor 2, when the maximum diameter corresponding to an arbitrary angle is inspected, the outer shape of the moving body 1 is taken by the camera 6. An image is taken and the rotation angle of each screen is synchronously recorded by the system of FIG. Then, after that, the video tape 18 is reproduced and the maximum diameter (φDmm) at each angle is measured by the image processing device 21, and the inspection result as shown in FIG. 5 is obtained.

As described above, by reproducing the video tape 18 and performing image processing, the motion state of the moving body 1 at an arbitrary rotation angle can be inspected. Furthermore,
If a program for automatically summing up the inspection results is created for the main computer 27, it becomes possible to automatically print out the inspection results as shown in FIG.

The embodiment shown in FIG. 1 also includes the following modes. The number of moving bodies is not limited to one and may be plural.
In this case, the rotary encoder 3, the rotation angle measuring unit 4,
The cameras 6, the image signal unit 7 and the like are installed according to the number of the moving bodies 1, and further, the image input unit 12, the audio input unit 16, the vertical synchronization signal input unit 13, the video tape recording / playback unit 17 of the image recording apparatus 11. The image output unit 19, the audio output unit 20, and the like are provided according to the number of the moving bodies 1. As a result, the motion statuses of a plurality of moving bodies can be simultaneously recorded on a plurality of videotapes 18, and they can be reproduced at the same time for intensive inspection at one location. The motion data of the moving body 1 is not limited to the rotation angle and may be velocity data. In this case, another speed sensor may be used instead of the rotary encoder 2. In addition, the movement data may be movement distance, acceleration, noise, and the like. In the above embodiment, when the rotation angle data is recorded in the audio recording band of the video tape, the horizontal synchronizing signal 102 is used to set the timing of the pulse data conveyance. However, the clock signal 103 may be used depending on the resolution of the audio recording band. You may use it. It is also possible to record motion data such as rotation angle data in an empty portion of the image recording band without recording it in the audio recording band of the video tape. The image recording medium is not limited to the video tape 18 described above, but an image memory or an optical disk may be used.

Next, a second embodiment of the present invention will be described. In this embodiment, the moving body is a train wheel.

FIG. 6 is an explanatory view showing the configuration near the wheels 201 and 202 of the train. In this figure, the rail 20
3 are provided with holes 203a and 203b. The holes 203a and 203b are contact members 204a and 203b whose heads are always slightly protruded from the upper surface of the rail by being biased by a spring material or the like. 204b is provided.

The lower ends of the contact members 204a, 204b are in contact with the plunger portions of the limit switches 205a, 205b, and the limit switch outputs an ON signal each time each wheel makes contact with the contact member. The traveling direction of the train is the direction of the arrow in FIG.
Is a front right wheel, and 202 is a rear right wheel.

Camera mounting holes and illumination lamp mounting holes are provided in front of and behind the holes 203a, 203b of the rail 203 in which the contact members 204a, 204b are disposed. Cameras 206a and 206b and illumination lamps 207a and 207b are arranged in the unit.

FIG. 7 is a block diagram for explaining the schematic operation of this embodiment. In this figure, each ON signal from the limit switches 205a to 205d is sent to the counter 208 and counted. Since the wheel number data generator 209 can specify the wheel at the time of counting based on this count number, it creates wheel number data for each count number.

Then, the wheel number data signal is sent to the camera 206 through the same process as described above with reference to FIG.
The data is recorded on the video tapes 210a to 210d in synchronization with the image data signals from a to 206d. In this case, the images captured by the cameras 206a to 206d can be displayed on the screen of the monitor 211.

When the video tape recorded as described above is reproduced, the video tape is rewound and then manually set in the image processing device 212. Then, the image processing device 212 outputs the image data and the corresponding wheel number data to the main computer 213.
Then, the main computer 213, for each wheel number, “amount of wear with respect to standard wheel”, “amount of collar wear”,
The inspection results for "tread wear amount", "shape data", etc. will be output.

[0038]

As described above, according to the present invention, an image data signal from a camera for photographing the motion condition of a moving body,
Since the motion data signal from the motion data detecting means is synchronized with each other and recorded on the image recording medium, the motion state of the moving body such as the wheels of the railway vehicle can be continuously photographed even though the structure is inexpensive. It is possible to record and reproduce both image data and motion data in association with each other.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a first exemplary embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a configuration of an image on the TV monitor according to FIG.

FIG. 3 is an explanatory diagram of a function of each signal in FIG.

FIG. 4 is an explanatory diagram of a procedure for creating a motion data signal in FIG.

5 is an explanatory diagram showing a correspondence relationship between image data and rotation angle data regarding a moving body 1 obtained from the apparatus of FIG.

FIG. 6 is an explanatory diagram showing a configuration around wheels according to a second embodiment of the present invention.

FIG. 7 is a block diagram for explaining a schematic operation of the second embodiment.

[Explanation of symbols]

 1 Moving Body 3 Motion Data Detecting Means (Rotary Encoder) 6 Camera (Video Camera) 17 Video Tape Recording / Playback Section 18 Image Recording Medium (Video Tape) 26 Display

Claims (2)

[Claims] 1. Image data relating to the exercise condition of a moving body is recorded on an image recording medium, and when this recording is reproduced, necessary character information is displayed on a screen of a display together with the image of the moving body, and this movement is performed. In a moving body inspection apparatus for performing a predetermined inspection on a body, a camera for photographing a moving state of the moving body, a movement data detecting means for detecting movement data of the moving body, and image data from the camera in a recording mode. The signal and the motion data signal from the motion data detecting means are recorded in the image recording medium in synchronization with each other, and in the reproduction mode, the image data signal and the corresponding image data are recorded from the recording of the image recording medium. A moving body inspection apparatus, comprising: a data signal recording / reproducing means for extracting a movement data signal. 2. The moving body inspection apparatus according to claim 1, wherein the moving body is a wheel of a railway vehicle, and the movement data is a rotation angle of each wheel.