KR20010111697A - System for measuring rotating speed and state of driving wheel for a crane - Google Patents

Abstract

The present invention displays the driving distance and driving state of the wheel of the crane by using an encoder and a digital camera, and detects the rotational speed of the reducer and the current consumption of the driving motor by using an optical sensor and a digital clamp meter. The present invention relates to an anti-abrasion measurement system of a traveling wheel of a crane that can accurately measure abrasion phenomenon and minimize cost and risk of failure.

Description

Measuring wheel wear resistance prevention system of crane {SYSTEM FOR MEASURING ROTATING SPEED AND STATE OF DRIVING WHEEL FOR A CRANE}

The present invention relates to a measurement system for preventing uneven wear of a traveling wheel of a crane, and more particularly, an optical sensor and a digital clamp meter using an encoder and a digital camera to display a traveling distance and a driving state of a crane's wheel. By detecting the rotational speed of the reducer and the current consumption of the driving motor, the surface wear phenomenon of the crane is accurately measured to minimize the cost loss and risk of failure due to the crane's running wheel uneven wear measurement system.

Currently, cranes are mostly used in companies that manufacture industrial machines, or in jobs that mainly use machinery such as heavy industry, thermal power, hydropower, and nuclear power plants. Overhead cranes, wharf RTGCs, and unloader cranes have partial or overall wear due to meandering.

The meandering driving phenomenon is a phenomenon in which a wheel rolling on a rail is rolled by one side of the rail instead of driving straight, and the wheel hits the rail and friction occurs. At this time, excessive friction is applied to various parts due to the friction generated and uneven wear occurs, and at the same time, the devices do not operate normally and cause irregular and unstable operation.

If left uneven wear or damage of the wheel due to the meandering operation, it will cause various mechanical failures, the center of gravity of the crane itself does not match, there is a risk of causing a large accident.

However, most drivers do not accurately identify the cause of the meandering operation, and due to the lack of accurate diagnosis and countermeasures, the work efficiency is low, and thus, the waste of time and the costly loss due to the early replacement of various parts are not. There is no choice but to take it. In addition, even though the driving wheel has semi-permanent durability, meandering occurs due to the continuous friction between the rail and the wheel due to the meandering operation, and thus, the wheel must be replaced early, and the resulting cost is large.

The present invention for solving the above problems is to detect the wear condition of the driving wheel by outputting the digital coefficient and the image data to accurately detect the cause of the wear caused by the meandering operation and to find a replacement method, the failure and parts of the device The aim is to provide an anti-abrasion measurement system for crane's running wheels that can prevent the cost loss and risks of early replacement.

1 is a circuit diagram showing the configuration of a running wheel anti-wear measurement system according to the present invention.

♣ Explanation of symbols for main part of drawing ♣

10: automatic selector 12: digital total analysis device

14: Screen splitter 16: Color video device

18: Digital Odometer 20: Digital RPM Meter

22 to 28: Driving wheels 30 and 34: Reducer

32, 36: motor 42-48: encoder

50 to 60: digital camera 62 to 68: optical sensor

70, 72: digital clamp meter

The running wheel anti-wear measurement system of the crane of the present invention for achieving the above object is a plurality of encoders for generating a pulse by converting the rotational force of the left and right running wheels of the crane to the length, and receives the pulse generated from the encoder A digital driving meter for outputting a driving speed of a wheel, a plurality of digital cameras for photographing rotation states of the driving wheel and a reducer, a screen splitter for dividing a video signal transmitted from the digital camera into a plurality of screens, and the screen A color video display device for recording and reproducing video data from the digital camera, and a color video display device for displaying a screen divided by a splitter and a video player for reproducing an image signal, and a video screen input from the color video device. With an automatic selector that automatically converts channels into a single screen And a digital comprehensive analysis device including a control unit, a color monitor, a CD-ROM writer, an inverter encoder, and a sound device and displaying image data input from the automatic selector as an image.

Hereinafter, with reference to the accompanying drawings it will be described in detail with respect to the running wheel anti-wear measurement system of a crane according to an embodiment of the present invention. 1 is a circuit diagram showing the configuration of a running wheel anti-wear measurement system according to the present invention.

Instead of the conventional manual method of measuring the uneven wear state of the driving wheel with the naked eye, a method for precisely detecting the current state of the driving wheel to identify the cause of uneven wear and preventing the same, according to a preferred embodiment of the present invention, uses a plurality of encoders. At the same time as measuring the mileage of the wheel accurately, the rotational state of the wheel was photographed using a number of digital cameras and displayed on the display device.

For this purpose, many encoders 42-48 which generate | pulse a pulse by switching the rotational force of a wheel to length were arrange | positioned in the front center of the traveling wheels 22-28. The pulse signals generated by the encoders 42 to 48 are sent to the digital travel measuring instrument 18. The digital travel measuring instrument 18 displays the traveling speed of the wheel in the form of mm unit where the meter unit is used based on the signals input from the encoders 42 to 48.

In addition, a large number of digital cameras 52 to 58 are arranged at a part where it is difficult to read the rotation state of the driving wheels 22 to 24 with the naked eye. The current state of the travel wheels 22 to 24 is transmitted to the screen splitter 14 as a video signal. The screen splitter 14 divides and displays video data input from these digital cameras 52 to 58 into four to six screens simultaneously on the color monitor. The divided video is divided through the screen splitter 14. The data is transmitted to the next color video device 16 and stored.

The color video device 16 records and reproduces video data transmitted from the digital cameras 52 to 58 via the screen splitter 14, and includes a color monitor that displays a video, a video player that reproduces video signals, and the like. It is provided. The image data processed by the color video device 16 is sent to the automatic selector 10 to automatically convert channels captured by the digital cameras 52 to 58 into a single screen on the monitor in order. Automatically converted image data is sent to the next digital comprehensive analysis device (12).

The digital comprehensive analysis device 12 is equipped with a computer as a control unit for controlling the overall operating state of the system, a color monitor, a CD-ROM writer, an inverter encoder, a sound device, and the like. It serves to display the image.

In addition to the apparatuses for detecting the rotational speed and the rotational state of the traveling wheel, the partial wear measuring system of the present invention is further provided with an apparatus for detecting the rotational speed of the reducer and the current of the motor.

That is, the light emitting plates were attached to the left and right reducers 30 and 34, and the optical sensors 62, 64 and 66 and 68 were mounted to face the light emitting plates so as to detect the rotation speed of the reducer. . At this time, the time per one rotation of the reduction gear (30, 34) measured by the optical sensors 62 to 68 is transmitted to the digital RPM measuring device 20 in the form of a digital signal, the digital RPM measuring device 20 at this time Based on the number of revolutions of the reduction gear (30, 34) per minute serves to display the number.

In addition, digital cameras 50 and 60 are further disposed on the left and right reducers 30 and 34, respectively, so that the rotational state of the reducers 30 and 34 can be controlled similarly to the driving wheels 22 to 28. 16) and the digital comprehensive analysis device 12 can detect the moving picture.

Digital clamp meters 70 and 72 are disposed on the left and right motors 32 and 36 which drive the driving wheels 22 to 28 through the reduction gears 30 and 34. Since the digital clamp meters 70 and 72 consume relatively large amounts of current when the driving of the motors 32 and 36 requires a large amount of force due to obstacles, the current consumptions on the left and right sides of the crane are different. The currents of the motors 32 and 36 are measured using the points that appear in different amperes.

The process of measuring the uneven wear of a crane using the system of such a structure is demonstrated.

First, the digital cameras 52 to 58 and 50 and 60 are disposed in front of the left and right wheels of the travel wheels 22 to 28 and the reducers 30 and 34, and the travel wheels 22 to 28. Encoder 42-48 is arrange | positioned in the center of the front of each, respectively. At the same time, a plurality of optical sensors 62 to 68 are additionally arranged on the rear of the reduction gears 30 and 34, and the digital clamp meters 70 and 72 are additionally arranged to the motors 32 and 36 to build a system. do.

In this state, the driving conditions of the wheels and rails photographed by the digital cameras 52 to 58 are divided into a plurality of screens (four in this embodiment) by the screen splitter 14, and then the color video device 16 In addition to being transmitted to and stored at the same time, it is sent to the automatic selector 10, for example, the channel is switched by one screen in the input order is transmitted to the digital comprehensive analysis device 12. In the digital comprehensive analysis device 12, the continuous operation and the stop operation, as well as the detailed detection can be performed in a manner of partial reduction, enlargement, ratio comparison, and the like.

When the reading of the image data is completed through this process, the whole driving test is started. In the driving test, when the traveling wheel of the crane rotates, the encoders 42 to 48 made to rotate at the same rate according to the rotation start to rotate together. The pulses are generated by the rotation of the encoders 42 to 48, and the generated pulse signals are sent to the digital travel measuring instrument 18, converted into units of mm, and then converted into meters and outputted.

On the other hand, when a problem occurs that the left and right running distance of the crane does not match, the rotation speed of the driving reducer (30, 34) and the motor (32, 36) that is the driving force source should be detected.

The rotational force test of the reduction gears 30 and 34 is performed by the optical sensors 62-68. The optical sensors 62 to 68 detect the rotation speeds of the reduction gears 30 and 34, and then transmit them to the digital RPM measuring device 20. The digital RPM measuring device 20 is inputted from the optical sensors 62 to 68. The number of revolutions per minute is displayed numerically.

At the same time, the digital cameras 50 and 60 photograph the operating states of the left and right reducers 30 and 34 and transmit them to the screen splitter 14, and the image signal input to the screen splitter 14 is as described above. Displayed through the color video device 16.

In addition, the current consumption of the motors 32 and 36 is detected by the digital clamp meters 70 and 72, and based on the detected data, it is possible to determine whether or not uneven wear is generated according to the above principle.

According to the present invention described above, by using the digital camera and the encoder to automatically output the current driving state of the driving wheel as digital coefficients and image data, it is possible to minimize the detection error compared to the conventional manual method that the human eye directly inspected And even the parts which could not be confirmed with the naked eye can be accurately detected to prevent uneven wear.

In addition, by accurately identifying and coping with the cause of the failure of the equipment, it is possible to prevent the cost and time loss caused by the failure, and to reduce the overall maintenance cost by extending the life of the entire equipment.

And by outputting the check list in a video and color report, the related parties can visually immediately recognize the cause and extent of partial abrasion, and the maintenance and maintenance plan for the facility can be established according to the production work schedule. There is an advantage to reduce the cost.

In addition, it is possible to safely and efficiently operate by informing the driver precisely of the weaknesses of the mechanical equipment, and it is effective in preventing large accidents.

Claims (3)

A number of encoders for generating pulses by converting the rotational force of the left and right traveling wheels of the crane into length, A digital driving meter which receives the pulse generated by the encoder and outputs a driving speed of the driving wheel; A plurality of digital cameras photographing the rotation state of the driving wheel and the reducer; A screen splitter for dividing a video signal transmitted from the digital camera into a plurality of screens; A color video device for recording and reproducing image data from the digital camera, including a color monitor for displaying a screen divided by the screen splitter and a video player for reproducing an image signal; An automatic selector for automatically channel converting an image screen input from the color video apparatus into a screen on a monitor; Measuring system comprising a control unit, a color monitor, a CD-ROM writer, an inverter encoder, a sound device, and a digital comprehensive analysis device for displaying image data input from the automatic selector as an image. . The method of claim 1, A plurality of optical sensors for measuring the rotational speed of the left and right reducer, And a digital RPM measuring device for converting and displaying the rotational speed of the speed reducer detected by the optical sensor into the rotational speed per minute. The method of claim 1, And a digital clamp meter for measuring a current consumption of the motor driving the driving wheel through the reducer.