JPH07117376B2 - Sagging observation device for wire drawing control - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sag observation device for wire drawing control.

[Conventional technology]

In order to prevent the electric wire being extended from coming into contact with trees or scaffolds that exist between steel towers during the work of extending power transmission lines, in the past, an observer was placed in the span, and the observer was used as a scaffold. The distance between the electric wires was measured by visual observation, and the result was reported to the operator of the wire drawing vehicle by telephone.

[Problems to be Solved by the Invention]

However, according to the conventional method as described above, there are problems that a surveillance staff member is required, and that the visual observation of the surveillance staff member is not always accurate. On the other hand, the so-called wire-drawing synchronous operation system (refer to Japanese Patent Application No. 63-171133 of the applicant of the present application) in which the wire-drawing work is automatically controlled based on the length of the winding strip on the winch side. ), In order to operate the system efficiently, it is effective to observe the sag of the electric wire in the span by an electronic technique instead of the observer.

Therefore, an object of the present invention is to provide a slackness observation device to which an electronic technique is applied.

[Means for Solving the Problems]

This invention has a winding strip length measuring unit on the winch side and a stripping line length measuring unit on the side of the extended vehicle, as a loosening observation apparatus for extended line control that achieves the above object. A transmitter and a receiver are provided, and a wire-drawing control device is provided on the wire-drawn car side.
The speed of the wire drawing vehicle is controlled by the wire drawing control device so that the difference between the along wire length obtained from the wire length measuring unit and the winding length obtained from the winding length measuring unit becomes zero. In the wire drawing speed movement control device thus configured, a TV camera installed between wire drawing diameters, an image processing device and a wire drawing control device to which an image signal of an electric wire output from the TV camera is input, In the image processing device, at least a pair of upper and lower windows defining the upper and lower limits of the electric wire and the image signal of the electric wire are superimposed, and a discrimination signal based on the positional relationship between each window and the electric wire is output to the wire drawing control device. According to the above, the speed of the drawn vehicle is controlled to maintain an appropriate sag.

[Action]

When the image of the wire being drawn by the television camera is above the upper limit window, the degree of sag is too low, when the image is between the upper and lower limit windows, the degree of sag is proper, and when it is below the lower limit window. Each discrimination signal of excessive sag is output to the wire drawing control device.

In the wire-drawing control device, the speed of the motor is controlled according to the determination signal to maintain proper sag.

〔Example〕

FIG. 1 shows an embodiment in which the apparatus of the present invention is incorporated in a wire-drawing synchronous operation system. Winch 1
A winding strip length measuring unit 2; a rolling line vehicle 3; a rolling strip length measuring unit 4; a transmitter 5 and a receiving unit 6 respectively provided between the winch side and the line rolling car side; A wire drawing control device 7 is provided.

This system adjusts the speed of the wire drawing wheel 3 so that the difference between the length of the wire drawing obtained from the wire length measuring unit 4 and the length of the winding wire obtained from the winding length measuring unit 2 becomes zero. Controlling is the basic operation.

In the above system, the television camera 9 is installed at an appropriate position between the towers 8. TV camera 9
Image signal a is input to the image processing device 10 and the monitor 11, and the discrimination signal b by the image processing device 10 is the wire drawing control device 7.
Entered in.

As shown in FIG. 2, the image processing apparatus 10 sets a plurality of windows 13 and 14 at arbitrary positions of an image 12 (this screen can be viewed on the monitor 11) by operating a keyboard 15, The determination signal b is output when the number of pixels of the white level exceeds a certain determination criterion between the black levels occupied in the windows 13 and 14.

In the case of the present invention, at least the upper limit window 13 and the lower limit window 14 are set, and when there is an image 16 'of the electric wire 16 between both windows 13 and 14, the judgment signal b becomes a sag degree proper signal. When the image 16 'exceeds the upper limit window 13 on the basis of the above-mentioned state, an under-relaxation signal is output. When the lower limit window 14 is exceeded, an excessive sag signal is output.

The wire drawing control device 7 controls the wire drawing vehicle 3 in consideration of the determination signal b.

〔The invention's effect〕

As described above, the present invention provides the automatic wire drawing control device,
It is possible to detect the sag of the electric wire at the time of wire drawing without the need for an observer, and it is possible to realize accurate wire drawing control with an appropriate sag based on the detection result.

[Brief description of drawings]

FIG. 1 is a block diagram of a wire drawing synchronization system, and FIG. 2 is a front view of a screen of a monitor. 1 ... Winch, 2 ... Winding strip length measuring unit, 3 ... Rolling wire car, 4 ... Rolling line length measuring unit, 5 ... Transmitting device, 6 ... Receiving device, 7 ... Rolling control Device, 8 ... 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. A winding strip length measuring section on the winch side and an extended strip length measuring section on the side of the drawn vehicle, and a transmitter and a receiver are provided between the winch and the drawn vehicle to extend the wire. A wire-drawing control device is provided on the vehicle side so that the difference between the wire-drawing strip length obtained from the above-mentioned wire-drawing strip length measurement unit and the winding strip length obtained from the winding strip length measurement unit becomes zero. In the automatic wire-drawing speed control device in which the speed of the wire is controlled by the wire-drawing control device, the image processing in which the image signal of the TV camera installed between the wire-drawing diameters and the electric wire output from the TV camera is input A device is provided to superimpose at least a pair of upper and lower windows defining the upper and lower limits of the electric wire in the image processing device and the image signal of the electric wire, and a discrimination signal based on the positional relationship between each window and the electric wire to the wire drawing control device. It outputs and controls the speed of the wire drawing car according to the discrimination signal. For extension line control and to maintain proper sag sag observation device.