JPH02122207A - Sag observing device for wire stringing control - Google Patents

Abstract

PURPOSE:To execute the sag of an electric wire at the time of wire stringing without depending on a monitoring person and to execute an exact wire stringing control by providing a television camera, an image processor and a wire stringing controller. CONSTITUTION:An image signal (a) of a television camera 9 is inputted to an image processor 10 and a monitor 11, and a discriminating signal (b) by the device 10 is inputted to a wire drawing controller 7. Subsequently, the device 10 sets plural windows 13, 14 to an arbitrary position of a screen 12 by operating a keyboard 15, and outputs the signal (b), when the number of picture elements of a black level or a white level occupied in each window 13, 14 exceeds a prescribed criterion. In this case, when an image 16' of an electric wire 16 exists between the windows 13, 14, the signal (b) becomes a sag appropriate signal. When the image 16' exceeds the window 13, based on this state, a sag too small signal is outputted. On the other hand, when said image exceeds the window 14, a sag excessive signal is outputted. Also, the device 7 controls a wire stringing car 3 by adding the signal (b).

Description

[Detailed Description of the Invention] [Field of Application in Industry-1-] This invention LJ relates to a sag observation device for wire extension control [There are two.

[Conventional technology] During power transmission line extension work, in order to prevent the cables being extended from coming into contact with trees, scaffolding, etc. that exist between the towers, a supervisor was conventionally placed in the span. , the supervisor visually measures the distance between the scaffolding, etc. and the electric wire, calculates 1lifull+, and calls the operator of the line extension vehicle with the result. I was trying to get in touch with you.

[Problem to be solved by the invention]

However, the above-mentioned conventional methods have problems such as the need for a watcher and visual measurements by the watcher's eyes that are not necessarily accurate. On the other hand, the so-called line extension operation system (see Japanese Patent Application No. 171133/1983 filed by the present applicant) automatically controls the line rolling speed of the line rolling car based on the winding strip length on the winch side. In order to operate the system efficiently, it is necessary to
It is effective to use electronic technology to observe the sag of the filter cables instead of using observers.

Therefore, the eleventh purpose of the present invention is to provide a sag observation device applying electronic technology.

[Failure to solve the problem]

This invention is a sag observation device for wire extension control that achieves the object described in L. Image signals from a device consisting of a sag camera installed in a wire span and a television camera thereof are input. It has an image processing device and a wire extension control device, and the image processing device superimposes an image signal of the wire on at least a pair of upper F windows defining upper and lower limits of the wire, and determines the positional relationship between each window and the wire. The configuration is such that a discrimination signal based on this is output to the line extension control device.

[Function] When the image of the electric wire taken by the TV camera is above the upper limit window, the sag is insufficient; when it is between the upper and lower limits, the sag is appropriate, and the image is below the lower limit window. In some cases, each determination signal indicating excessive slackness is output to the wire extension control device.

In the wire extension control device, the speed of the motor is controlled according to G, I, and their discrimination signals to maintain the appropriate slackness.

[Example] Figure 1 shows the installation of the device of the present invention in a line extension synchronous operation system.
This is a detailed example. The wire extension synchronous operation system includes a winding strip length measuring section 2 on the winch 1 and a wire extension length measuring section 4 on the wire extension car 3.
A transmitting device 5 and a receiving device 6 are provided between the winch side and the track rolling car side, respectively, and a track extension control device 7 is provided on the track rolling vehicle side.

This system adjusts the speed of the wire rolling car 3 so that the difference between the wire length obtained from the wire length measuring section 4 and the winding strip length obtained from the winding strip length measuring section 2 becomes zero. The basic operation is to control.

In the above system, television cameras 9 are installed at appropriate positions between the steel towers 8.

An image signal a from the television camera 9 is input to an image processing device 10 and a monitor 11, and a discrimination signal from the image processing device 10 is input to the line extension control device 7.

As shown in FIG. 2, the image processing device 10 has a screen 12 (
The screen can be viewed on the monitor 11. ) multiple windows 13.14 keyboard 15 in any position
When the number of pixels occupying each window 13, 14 at the white level or the number of pixels at the white level exceeds a certain criterion, a determination signal is output.

In the case of this invention, at least one upper limit window 13 and one lower limit window 14 are set, and both windows 13.1
If there is an image 16' of the electric wire 16 between the positions 4 and 4, the determination signal S becomes a sag suitability signal.

Based on the above state, when the image 16' exceeds the upper limit window 13, an under-sag signal is output. Moreover, when the lower limit window 14 is exceeded, an excessive slackness signal is output.

The track extension control device 7 controls the track extension vehicle 3 by taking into consideration the above-mentioned determination signal.

〔Effect of the invention〕

As described above, this invention can detect the slackness of wires during wire extension without relying on a supervisor, and by inputting the detection results into the wire extension synchronization system, accurate wire extension control can be realized. can do.

[Brief explanation of drawings]

Fig. 1 is a block diagram of the line extension synchronization system, and Fig. 2 is a front view of the monitor screen. 1... Winch, 2... Winding strip length measuring section, 3... Line extension car, 4...
Wire extension length measuring unit, 5... transmitting device, 6...
...Receiving device, 7...Line extension control device, 8...
... Steel tower, 9... TV camera, 10...
・Image processing device, 11...Monitor 12...
... Screen, 13 ... Upper limit window, 14 ... Lower limit window, 15 ... Keyboard, 16 ... Electric wire,
16'... Image.

Claims (1)

[Claims] (1) It has a TV camera installed in the wire span, an image processing device and a wire extension control device into which the image signal of the wire output from the TV camera is input, and the image processing device A sag observation device for wire extension control, which superimposes at least a pair of upper and lower windows defining a lower limit and an image signal of an electric wire, and outputs a discrimination signal based on the positional relationship between each window and the wire to a wire extension control device.