JPH07114523B2 - Overhead line automatic inspection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overhead line automatic inspection apparatus for automatically inspecting electric power lines, overhead ground lines, etc., and in particular, it is possible to inspect abnormal points in a short time and to prevent abnormal points from being overlooked. , Relates to an automatic overhead line inspection device capable of reducing fatigue of an inspector.

[0002]

2. Description of the Related Art An overhead ground wire installed between supports is variously damaged by lightning damage, and if left unattended, a serious accident may occur. For this reason, in the past, a video camera was mounted on a self-propelled machine that can run on an overhead ground line, and the image of the overhead ground line captured by the video camera was played back with a video tape recorder and observed to find an abnormal location. There is.

[0003]

However, in the conventional overhead wire inspection apparatus, the overhead ground wire is recorded on the video tape over the entire length of the overhead ground wire, so that the observer observes the reproduced screen for a very long time. Must be continued, and there is a risk that defects may be overlooked.
There is a problem that the inspector becomes very tired.

An object of the present invention is to provide an automatic overhead line inspection apparatus capable of inspecting an abnormal portion in a short time, less likely to overlook the abnormal portion, and reducing fatigue of an inspector. To provide.

[0005]

The present invention is directed to a self-propelled machine 1 which can travel on an overhead line 5, and a video which is mounted on the self-propelled machine 1 and which photographs the overhead line 5 and records it on a built-in video tape. In an overhead line automatic inspection device equipped with a camera 4, an illumination device 2 mounted on the above-mentioned self-propelled machine 1 for illuminating the overhead line 5 and using a high-frequency fluorescent lamp 10 as a light source; Line sensor 11 for detecting reflected light from 5
And an abnormal signal output unit 18 that outputs a signal that detects an abnormality to the video camera 4 only when the amount of reflected light detected by the line sensor 11 mounted on the self-propelled machine 1 is an abnormal value. Line sensor for the reflected light of the overhead line 5 from a plurality of directions with appropriate intervals in the circumferential direction between the lighting device 2 and the overhead line 5.
The overhead line automatic inspection device is provided with a plurality of sensor cameras 3 to be detected at 11, and omits images of normal parts that do not require inspection and observes only abnormal parts that need inspection.

[0006]

In the present invention, the overhead line is sequentially illuminated by the lighting device while the self-propelled machine is running, and the reflected light from the overhead line is sequentially detected by the line sensor. Wire scratches on the surface of the overhead wire,
The amount of reflected light exceeds a predetermined upper limit value if there is foreign matter attached, and the amount of reflected light falls below a predetermined lower limit value if there is rust adhesion, wire scratches, broken wires, dirt, and the like. Also, if the outer diameter of the overhead wire becomes abnormally thick due to foreign matter, etc., the amount of light received by the line sensor exceeds the upper limit of the outer diameter, and if the outer diameter of the overhead wire becomes abnormally thin due to wire breakage, etc. The amount of light received by the sensor is less than a predetermined outer diameter lower limit value.

While the amount of light received by the line sensor is within a predetermined range, the video camera carries out normal photographing, and the abnormality detection signal is not recorded on the video tape at a normal place where inspection is unnecessary. At an abnormal location of the overhead line, the reflected light from the overhead line exceeds the specified upper limit value or outer diameter upper limit value, or falls below the specified lower limit value or outer diameter lower limit value, and the received light amount of the line sensor becomes an abnormal value. The abnormal signal output section causes the video camera to output the abnormal signal, and at the same time as photographing the abnormal portion of the overhead line, the abnormal signal is recorded on the video tape.

Therefore, on the video tape in the video camera, normally only an image is recorded at a normal portion that does not require inspection, and an image and an abnormal signal are recorded at an abnormal portion that requires inspection. It is only necessary for the inspector to omit the normal parts of the overhead line that do not need to be inspected, and to see only the abnormal image of the part of the abnormal signal that requires inspection.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An overhead line automatic inspection apparatus according to an embodiment of the present invention shown in the configuration diagram of FIG. 1 includes a self-propelled machine 1 and three lighting devices 2 mounted on the self-propelled machine 1. 3 mounted on self-propelled machine 1
It has three sensor cameras 3 and three video cameras 4. The self-propelled machine 1 is 1 each before and after sandwiching the overhead ground wire 5 from above and below.
It is provided with a pair of traveling wheels 6, and is configured to travel on the overhead ground wire 5 by being pulled by a self-propelled machine equipped with an electric motor (not shown).

Further, the self-propelled machine 1 is provided with a video camera and a battery 8 as a power source for a processing device 7 described later. The battery 8 and the recording device are arranged below the self-propelled machine 1 in order to lower the center of gravity of the self-propelled machine 1 and stably suspend the self-propelled machine 1 on the overhead ground wire 5. As shown in the schematic view of FIG. 2, the video camera 4 is supported, for example, on the top of the self-propelled machine 1 so as to hold a lens from three directions in the direction of the electric wire so that the entire circumference of the electric wire can be photographed. An image of 5 viewed from three directions is placed in the field of view of the video camera 4.

The three illuminating devices 2 are each provided with a circle type high frequency fluorescent lamp 10 as a light source, and each high frequency fluorescent lamp 10 concentrically surrounds the field of view of one sensor camera 3 and an aerial ground wire. It is supported by the self-propelled machine 1 through the sensor camera 3 so as to irradiate the light 5 therewith. It is also possible to use a heating lamp, a general fluorescent lamp, or the like as the light source of the illuminating device 2, but in removing noise caused by extraneous light, the high-frequency fluorescent lamp 10 has a short light quantity change cycle.
Is more advantageous.

As shown in the schematic diagram of FIG. 3, the lens optical axis of each sensor camera 3 is orthogonal to the overhead ground line 5 to be inspected, and is oriented in a direction substantially parallel to the three photographing by the video camera 4. The light reflected from the portion of the overhead ground wire 5 within the shooting range of the video camera 4 is received. As shown in the block diagram of FIG. 4, each sensor camera 3 includes a CCD line sensor 11 that receives reflected light from the overhead ground wire 5,
The output of the CCD line sensor 11 is input to the processing device 7.

The processing unit 7 includes a received light amount calculation unit 12, an abnormal gloss detection unit 13, an abnormal turbidity detection unit 14, a wire diameter calculation unit 15, a foreign matter adhesion detection unit 16, a wire breakage detection unit 17, and an abnormal signal output unit. Equipped with 18. The received light amount calculation unit 12 calculates the received light amount of each line sensor 11, and outputs a received light amount signal composed of an analog signal such as a level signal having a signal value corresponding to the calculation result or a digital signal obtained by digitally converting the analog signal. It is configured to output to the abnormal gloss detection unit 13 and the abnormal turbidity detection unit 14.

In the abnormal gloss detection unit 13, the calculation result of the received light amount calculation unit 12 is compared with a predetermined upper limit threshold value, and if the calculation result exceeds the upper limit threshold value, an abnormal gloss detection signal is output as an abnormal signal. It is output to the section 18. In addition, the abnormal turbidity detection unit 14
Then, the calculation result of the received light amount calculation unit 12 is compared with a predetermined lower limit threshold value, and when the calculation result is below the lower limit threshold value, an abnormal turbidity detection signal is output to the abnormal signal output unit 18.

The wire diameter calculating unit 15 calculates the wire diameter from the light receiving area and outputs a wire diameter signal consisting of an analog signal or a digital signal having a signal value corresponding to the wire diameter to the foreign matter adhesion detecting unit 16 and the wire breakage. Output to the detection unit 17. In the foreign matter adhesion detection unit 16, the calculation result of the wire diameter calculation unit 15 is compared with a predetermined wire diameter upper limit threshold value. If the calculation result exceeds the wire diameter upper limit threshold value, the foreign matter adhesion detection signal is an abnormal signal. It is output to the output unit 18.

The wire breakage detection unit 17 includes a wire diameter calculation unit.
The calculation result of 15 is compared with a predetermined lower limit threshold value of the wire diameter, and when the calculated result is less than the lower limit threshold value of the wire diameter, a disconnection detection signal is output to the abnormality signal output unit 18. Abnormal signal output section
Reference numeral 18 denotes an abnormal gloss detection signal of the abnormal gloss detection unit 13, an abnormal turbidity detection signal of the abnormal turbidity detection unit 14, a foreign matter adhesion detection signal of the foreign matter adhesion detection unit 16, and a wire breakage detection signal of the bare wire breakage detection unit 17. When at least one of them is input, an abnormal signal is output to the video camera 4, and the image and the abnormal signal are simultaneously recorded on the video tape when the video camera 4 shoots.

The self-propelled machine 1 is provided with a position detection device for detecting the position of the self-propelled machine 1 on the overhead ground line 5 in association with the traveling wheels 6. This position detecting device includes, for example, a rotary encoder and a counter, and records the position of the self-propelled machine 1 based on the count value of the counter. Also,
The count value of this counter is input to the image signal forming unit, converted into an image signal corresponding to the numerical value indicating the position of the self-propelled machine 1 in the image signal forming unit, and input to the video camera 4.

As shown in FIG. 5, for example, the video camera 4 has an item display window 24 in the screen 23, and an image showing the position of the self-propelled machine 1 in the window 24, that is, the numbers of the length and address. Is recorded, and three images 25 of the overhead ground wire 5 are recorded in the other part. In addition,
In the window 24, in addition to the image 23 showing the position of the self-propelled machine 1, for example, as shown in FIG.
The test execution date 27, the time 28, the test execution location 29, the processing number 30, and the lamp 31 that lights up when an abnormality occurs are displayed.

As shown in FIG. 1, the overhead line automatic inspection device is placed on the overhead ground line 5, the count value of the counter of the position detection device is reset, the fluorescent lamp 10 is turned on, and the sensor camera 3 is turned on.
Then, after the processing device 7 is activated, the electric motor is started to move the self-propelled machine 1 on the overhead ground wire 5. The overhead ground wire 5 is illuminated by the illumination device 2 from three surrounding directions, the reflected light is received by the three sensor cameras 3, and the output of the sensor camera 3 is input to the processing device 7, whereby the overhead ground wire 5 is changed. To be monitored.

If there is an abnormal location on the overhead ground wire 5, the amount of reflected light received by the sensor camera 3 will deviate from the normal value, or the width of the light-receiving area will deviate from the normal value. That is,
If there is a wire flaw or foreign matter attached, the amount of received light will be higher than the normal value, and if there is rust, strand flaw, wire breakage, dirt, etc., the amount of received light will be less than the normal value and if there is foreign matter attached The width of the light receiving region becomes larger than the normal value, and if there is a break in the strand, the width of the light receiving region becomes smaller than the normal value.

When the amount of received light exceeds the normal value, the abnormal gloss detection unit 13 outputs an abnormal gloss detection signal, and when the amount of received light becomes less than the normal value, the abnormal turbidity detection unit 14 outputs an abnormal turbidity detection signal. Output and if there is foreign matter, foreign matter adhesion detector
16 outputs a foreign matter adhesion detection signal, and if there is a wire break, the wire break detection unit 17 outputs a wire break detection signal, and the abnormal signal output unit 18 inputs at least one of these detection signals. Then, the abnormal signal is output to the video camera 4, and the abnormal signal is recorded on the video tape together with the image of the overhead ground wire 6 taken by the video camera 4.

Simultaneously with this image, the item display window 24 is also displayed from the position detecting device through the image signal forming section.
Longitudinal / address image data to be displayed inside, image data of the test execution date 27, time 28, test execution place 29, processing number 30, lamp 31 etc. input by the input unit 26 are input and the video tape It is recorded in a predetermined recording area. When the abnormality detection of the overhead ground wire 5 is completed, the abnormal gloss detection signal of the abnormal gloss detection unit 13, the abnormal turbidity detection signal of the abnormal turbidity detection unit 14, the foreign matter adhesion detection signal of the foreign matter adhesion detection unit 16 or the wire breakage detection The output of the line break detection signal from the section 17 is stopped, and the operation of the video camera 4 is stopped.

In this way, the image of the normal portion of the overhead ground wire 5, the image of the abnormal portion of the overhead ground wire 5 and the abnormal signal are recorded on the video tape in this manner, so that they are later recorded by the video reproducing device. When reproducing, the data of only the abnormal portion of the overhead ground wire 5 which issued the abnormal signal should be viewed. Therefore, the total amount of data that the inspector observes is reduced, and it becomes less likely to overlook an abnormal place by looking at only the image of the abnormal place that generated the abnormal signal, and the abnormal place is overlooked. It will be difficult. Moreover, since the time for viewing the inspection image is shortened, the fatigue of the inspector is reduced.

In the above embodiment, the inspection of the overhead ground wire 5 is described, but it is possible to inspect the power line using the above-mentioned overhead wire automatic inspection device, and the self-propelled machine 1
It is also possible to inspect ropeway supporting cables and the like by changing the form. Also, CCD line sensor
It does not prevent the use of other image sensors in place of 11.

[0025]

As described above, the present invention is mounted on the above-mentioned self-propelled machine and illuminating the overhead line, and a line mounted on the above-mentioned self-propelled machine and detecting reflected light from the overhead line. By providing a sensor and an abnormal signal output unit that outputs an abnormal signal to the video camera when the amount of reflected light detected by the line sensor is an abnormal value, the self-propelled machine can monitor the presence or absence of an abnormality on the overhead line. Move the video camera along the overhead line.

Then, an abnormal signal and an image taken by a video camera are recorded at the location where the abnormality is detected. Therefore, when the inspector reproduces the record and inspects it, the image of the normal portion that does not need to be inspected is omitted and only the image of the abnormal portion that needs to be inspected is observed, so that the inspection time is shortened.

In addition, the inspection time is shortened, and the feeling of nervousness of observing only the image of the abnormal portion causes
The abnormal place is hardly overlooked, and the abnormal place is less likely to be overlooked. Furthermore, the fatigue of the inspector is significantly reduced by shortening the inspection time. In the present invention, particularly when a high-frequency fluorescent lamp is used as the light source of the illumination device, noise due to external light received by the sensor camera can be easily removed by using a bandpass filter.

Further, according to the present invention, when a plurality of lighting devices and a plurality of sensor cameras are used to receive reflected light of the overhead line from a plurality of directions at appropriate intervals in the circumferential direction, the sensor camera receives light. Is advantageous because an abnormal place can be surely found.

[Brief description of drawings]

FIG. 1 is a configuration diagram of the present invention.

FIG. 2 is a schematic diagram showing an arrangement of video cameras.

FIG. 3 is a schematic diagram showing an arrangement of a lighting device and a sensor camera.

FIG. 4 is a block diagram showing a circuit of the present invention.

FIG. 5 is a pattern diagram of a recording / playback screen of a video camera.

FIG. 6 is a pattern diagram of an item display window.

[Explanation of symbols]

 1 ... Self-propelled machine 2 ... Illumination device 3 ... Sensor camera 4 ... Video camera 10 ... High-frequency fluorescent lamp 11 ... CCD line sensor 18 ... Abnormal signal output section

Claims (1)

[Claims] 1. An overhead line automatic system comprising a self-propelled machine 1 capable of traveling on an overhead line 5, and a video camera 4 mounted on the self-propelled machine 1 for photographing the overhead line 5 and recording it on a built-in video tape. In the inspection device, the overhead line 5 mounted on the self-propelled machine 1
In order to inspect the entire circumference of the overhead line 5, a plurality of lighting devices 2 using a high-frequency fluorescent lamp 10 that illuminates from the circumferential direction of the overhead line 5 and reflected light from the circumferential direction of the overhead line 5 that is also mounted on the self-propelled machine 1 are used. A process including a plurality of sensor cameras 3 each having a line sensor 11 for detecting, and an abnormal signal output unit 18 that outputs an abnormal signal as an error only when the amount of reflected light detected by the line sensor 11 exceeds a threshold value set in advance. The device 7 is provided, and the video camera 4 is configured to be activated only by the abnormal signal from the abnormal signal output unit 18, and the inspection is performed by recording only the abnormal portion of the overhead line 5 which needs inspection on the video tape. Automatic overhead line inspection device that eliminates unnecessary images of normal locations on overhead line 5 and facilitates observation work on abnormal locations.