KR100390525B1 - WIRELESS CCTV SYSTEM for tower crane - Google Patents

Abstract

The present invention relates to a tower crane used to transport various equipment necessary for the construction of the construction site, more specifically, the tower crane driver located in the cab of the high altitude ground lift even if the visibility is not secured because of obstacles or distance from the ground, etc. The present invention relates to a tower crane wireless video surveillance apparatus capable of reliably knowing the size, location and surroundings of water through a cab video monitor.

To this end, the present invention is equipped with a CCTV camera having a zoom function and a rotation function on the trolley moving horizontally on the jib of the tower crane, and a zoom function, a rotation function of the camera and a wireless video transmitter for sending an image to the monitor of the tower crane cab. And a wireless control receiver for controlling the function of turning on / off the power of the camera, a camera wireless controller for installing the solar panel and power controller for supplying the CCTV camera on the trolley and controlling the CCTV camera in the cab of the tower crane; By installing a wireless video receiver to receive the video signal and a video monitor that displays the photographed subject, the tower crane driver operates the camera wireless controller to operate the zoom and rotation functions of the CCTV camera during the lifting operation. Bring the focal point to or away from the ground, and the edge of the salvage In the magnified view, the position, size and surroundings of the salvaged object are recorded while adjusting the position by using a rotating machine to grasp the working situation through the image of the video monitor, and the tower crane can be safely and conveniently operated. This greatly improves work efficiency.

Description

Wireless Video Surveillance System for Tower Cranes {WIRELESS CCTV SYSTEM for tower crane}

The present invention relates to a tower crane used for transporting various equipment necessary for construction at a construction site, and more particularly, to install a CCTV camera having a zoom function and a rotating function in a trolley for moving the jib on the tower crane horizontally. A video monitor is installed in the cab to wirelessly send and receive images taken by the camera, and to operate the camera's zoom and rotation functions. Even if the field of view is not secured for a reason, the wireless video surveillance system of the tower crane, which makes it possible to safely operate the tower crane more safely and conveniently by grasping the size, location, and surrounding conditions of the ground lifting object through the image of the video monitor. will be.

In general, construction sites are installing and operating tower cranes to transport various equipment such as rebar and H beams required for construction.

Looking at the main components of the tower crane, the vertically elevated mast and the upper surface of the mast is installed horizontally long horizontally with the ground surface and connected to the trolley and trolley moving horizontally on the jib, the hook is installed at the end of the trolley At the same time with the horizontal movement, while carrying a vertical movement to carry the lifting material, it is composed of a cab installed in the lower portion of the jib.

The tower crane constructed in this way rotates the jib, moves the trolley linearly on the jib, places the hook on the upper part of the weight to be lifted, lowers the hook to lift and lift the salvage, rotates the jib, and moves the trolley. The water is placed on top of the target point, and then the hook is lowered to transport the salvage to the target point by lowering the salvage to the target point.

This lifting work is carried out by the operator to control the tower crane in the cab of the high-altitude, so the tower crane operator receives the work situation from the ground operator through the hand signal or the radio, so that the jib rotates, the trolley moves linearly, and the hook rises. Perform tower crane driving, descent, etc.

Therefore, as the construction of the building progresses, the tower crane must be raised periodically as the height of the building gradually increases. As a result, the driver's cab is raised from the ground, and the driver's vision is far from the ground. The range of blind spots where the driver's sight is obscured by the building is enlarged, and the lifting and lowering of the trolley and hooks in the blind spots is entirely dependent on hand signals and radio calls.

Therefore, the conventional tower crane driving method performed as described above is very inconvenient to operate because the driver has to operate under the indication of the number of signals in a state where the driver dimly checks or does not see the ground situation at a high altitude far from the ground. In addition, the work efficiency is greatly reduced, and the risk of safety accidents is present.

Therefore, in order to solve this problem, in order to secure the driver's vision as in Utility Model Publication No. 20-0191025 (May 22, 2000), it was installed and operated by wire using a CCTV camera. However, since the power cable, the coaxial cable for video signal, the camera zoom lens, and the control cable for controlling the rotator must be connected from the cab to the CCTV camera of the trolley, all three types of cables are fixed to the trolley so that the trolley can be folded or unfolded during linear movement. While fixing the fixed holder at equal intervals, while fixing the two ends of the wire rope to the upper point of the trolley and the cab in one horizontal member of the jib to form a kind of rail, and to move along the wire rope If the pulley is installed by hanging, and the pulley is operated by connecting and fixing the pulley with fixed holders fixed at equal intervals to the above three types of cables, the cable is not folded as shown in Fig. 6 and the folding degree of the cable is different as shown in Fig. 7, When folded, the three types of cables are twisted together and the trolley straight The speed of movement can be changed from 1st to 4th stage, so if the cable moves forward quickly, the cable is broken, and if the three types of cables are put together in one heat shrink tube as shown in Fig. 8, the cable will not be folded well. If the trolley moves forward quickly in this state, the cables are twisted and the cables are broken, and the trolley is further retracted toward the cab. If the gap of the cable is narrower than the folding of the cable, the pulley moving along the rope is derailed from the rope because the cable is not folded as shown in Fig. 6, so that the pulley does not roll over the wire rope when the trolley is advanced again, and the pulley and the fixing holder are The rope is pinched at the joint of the trolley The kkeuneojyeoseo could not properly operate the equipment.

An object of the present invention is to install a closed circuit television (CCTV) in the tower crane to solve the above problems, even if the tower crane driver located in the cab of the high altitude, even if the field of view is not secured due to obstacles or long distance, lifting the ground In order to reliably grasp the size, location and surroundings of the water through the video monitor's video in the cab, it transmits and receives video signals wirelessly, wirelessly controls the control of the camera's zoom lens and the rotator, and also the power supply in the trolley. It is to provide a wireless video monitoring device of the tower crane to solve the problems caused by the cable by using a solar panel to solve the problems caused by the cable, to operate the tower crane more safely and conveniently, to greatly improve the work efficiency. .

When the CCTV camera is installed in a wired line using a cable to achieve the above object, as described above, when the trolley shifts quickly and linearly, the cable is broken and the device cannot be operated.

Accordingly, the present invention is equipped with a CCTV camera having a zoom function and a rotation function on a trolley moving horizontally on a jib of a tower crane, a wireless video transmitter, a wireless controller, a receiver, a solar panel, a power controller and a battery, and a cab of a tower crane. Wireless video surveillance device of a tower crane, characterized in that installed in the camera wireless controller for controlling the CCTV camera, a wireless video receiver for receiving the video signal of the photographed subject and a video monitor to reproduce the video signal as an image To provide.

1 is a view showing a wireless video surveillance of the tower crane according to the present invention

2 is a side view showing the tower crane

3 is an enlarged view of a portion “B” of FIG. 2.

Fig. 4 is an enlarged view of the section “X” of XB in Fig. 2;

5 is an enlarged view of a portion “A” of FIG. 2.

FIG. 6 is a view showing tower crane work when a cable is folded in a wired manner in FIG. 6 shown in Utility Model Publication No. 20-0191025.

7 is a diagram showing a tangled state of a cable, which is actually shown when the coaxial cable, the control cable and the power cable for the camera are tied to a fixed holder and installed in the same manner as in FIG.

8 is a diagram showing the interference phenomenon with the cable of the adjacent fixed holder, which is actually shown when the coaxial cable, the control cable and the power cable are installed in one heat shrink tube.

※ Explanation of symbols for main parts of drawing

1: Jib 2: Trolley 3: Hook

4: trolley workbench 5: cab 10: CCTV camera

11: Wireless video transmitter 12: Wireless control receiver 13: Solar panel

14: power controller 15: battery 16: image antenna

17: antenna for control 20: wireless video receiver 21: video monitor

22: Camera wireless controller 23: Operation button part 51: First communication cable

52: second communication cable 53: power cable

Hereinafter, with reference to the accompanying drawings, the technical configuration of the present invention will be described in detail.

As shown in FIG. 2, when the video monitoring device of the tower crane according to the preferred embodiment of the present invention is installed in the trolley 2, the trolley 2 horizontally moving on the jib 1 of another work lane is It is connected to the trolley (2) and is horizontally moved together with the hook (3) for lifting various equipment, the trolley (2) is wire rope connected to the trolley (2), jib (1), hook (3) There is a trolley workbench 4 for maintenance, and the like, and a CCTV camera 10 having a zoom function and a rotation function is installed at the bottom of the trolley workbench 4 as shown in FIGS. 3 and 4;

A wireless video transmitter electrically connected to the CCTV camera 10 and converting the video signal into an RF signal toward the wireless video receiver 20 of the cab 5 and transmitting it to the air through the electrically connected antenna 16 for an image ( 11);

The control signal is received as an RF signal through the control antenna 17 electrically connected to the zoom lens and the rotator and electrically connected from the camera wireless controller 22 of the cab 5 to convert the digital signal into an analog signal and analyze the electrical signal. A wireless control receiver 12;

A solar panel 13 for generating direct current electricity by receiving sunlight from the sun is installed in the safety net of the trolley work bench 4;

The DC power supplied from the solar panel 13 is charged in the battery 15 that can charge the power to operate the device for more than a week in preparation for winter, rainy season, cloudy days lacking sunshine, the battery (15) Checking the amount of charge), if the over-discharge occurs, the power to the CCTV camera 10, the wireless video transmitter 11, the wireless control receiver 12, which is electrically connected, and stops charging when overcharge occurs, the battery (15) And, on a cloudy day, the current supplied from the solar panel is only about 40% of the rated output current, so it is composed of a power controller 14 having a function of automatically adjusting the voltage and current (AVR function) to charge.

However, in the implementation of the above technology, the rotation of the CCTV camera 10 is mainly composed of a product using a commercial power AC 110V or 220V or a product using AC 24V, to operate the DC electric current to the DC electric current Inverter function that boosts and boosts should be added to power controller 14, but in that case, the inverter will continue to operate even when the rotor is not operating, consuming the charging current of battery 15, and the solar current is high because the current consumption is high. Since the power generation capacity of (13) should be large, the size of the solar panel 13 should be made large so that there is no space to be installed in the trolley (2). In order to compensate for this, it is necessary to use a motor capable of operating voltage of DC 12V and 500mA, and to reduce the load of the motor, to make a dome type compact by integrating the CCTV camera 10, the zoom lens, and the rotor. desirable. Accordingly, when the current consumption of the CCTV camera 10 is DC 12V, 500mA, the current consumption of the wireless video transmitter 11, DC12V, 500mA, and the current consumption of the wireless control receiver 12 are no signals, DC12V, 100mA is used. Since DC 12V and 500mA are used for the rotor only when there is a control signal from the wireless controller 22, the total current consumption of the devices installed in the trolley 2 is DC 12V, 1.1A to 1.6A, and the rotor is always used. In this case, DC 12V, 1.1A current consumption is normally used.

Therefore, the size of the product which outputs the solar panel 13 to DC 12V, 2.6A is made of 50Cm × 80Cm horizontally and can be installed on the railing of the trolley work table 4, and the capacity of the battery 15 is DC 12V. By using the vehicle battery of 60A to 90A, even on a cloudy day without sun, the device can be used for 7 to 10 days to operate the devices of the trolley 2 based on the amount of sunshine of 8 hours a day. The current can be charged to solve the power problem, which is the biggest problem constituting the wireless video monitor.

In addition, as shown in FIG. 5, when the devices installed in the driver's cab 5 are viewed, the video signal transmitted by the wireless video transmitter 11 is received as an RF signal through an electrically connected video antenna 16. A wireless video receiver 20 converting the video signal;

A video monitor 21 electrically connected to the wireless image receiver 20 to visually express an image signal captured by the CCTV camera 10;

Analyzing the electric signal by the operation of the driver's operation button unit 23, digitally output with a pre-input code, converts it back to an RF signal and transmits it to the air through the electrically connected control antenna 17 to the air With roller 22; It is characterized in that the technical idea of the present invention is implemented.

In addition, among the devices installed in the trolley described above, the wireless video transmitter 11, the wireless controller receiver 12, the power controller 14, and the battery 15 are manufactured by a separate integrated box, Installed all inside the box, the integrated box is firmly fixed to the safety net handrail of the trolley workbench 4, so that when the driver performs repair work of the jib on the trolley workbench 4, the behavior is not limited by the present invention and eyes Protect your device from rain, rain and dust.

The wireless video surveillance device of the present invention configured as described above operates the zoom and rotation functions of the CCTV camera 10 wirelessly while the tower crane driver operates the camera wireless controller 22 during the lifting operation. Approaching or moving away from the camera, while operating the rotator in up, down, left, and right directions to wirelessly receive an image signal photographing the size, position, and surrounding situation of the salvaged object and visually expressing the image on the video monitor 21. .

In the above, the CCTV camera 10 may be fixed so as to focus directly under the ground by mounting only the zoom lens, but if the cab 5 of the tower crane is located at a high altitude due to the height of the building, the same length as the rebar and the H beam. When both edges of the long lifting object are tied together and hooked on the hook (3), the driver can zoom in to view the tied state of both edges. For a fixed camera, operating the zoom lens only magnifies the center of the lifting object, so that the edges cannot be seen. It should be equipped with a rotating function, and according to Korea Industrial Safety Corporation's Construction Death Accident No. 2001-25 (2001. 2. 5.), during the accident caused by tower crane, the lifting edges of the salvage were unstable and the lifting and unloading work There have been many reports of accidents caused by falling salvage.

On the other hand, the RF communication through the image communication antenna 16 of the wireless image transmitter 11 and the wireless image receiver 20, and a control antenna of the camera wireless controller 22 and the wireless control receiver 12 ( The RF communication through 17) converts each antenna into an infrared sensor, and wirelessly transmits the wireless video transmitter 11, the wireless video receiver 20, the camera wireless controller 22, and the wireless control receiver 12. It is also possible to change from a communication method to an infrared beam communication device and to switch from an RF communication method to an infrared communication method as a whole.

In addition, the operation button 23 adds a voice recognition function, and pre-records the operation command of the zoom function and the rotation function of the CCTV camera 10 with the driver's voice in advance to zoom and rotate the CCTV camera 10. By allowing the operator to operate the voice while driving the tower crane, there is no separate hand operation for operating the CCTV camera 10, both hands of the driver can be dedicated to the control of the tower crane.

The operation and operation of the tower crane video surveillance apparatus of the present invention configured as described above will be described.

When the driver drives the tower crane and moves the trolley 2 to the upper part of the salvage while rotating the jib 1, the CCTV camera 10 moves to the upper part of the salvage with the trolley 2.

In this case, the CCTV camera 10 according to the present invention photographs the ground with the salvaged object and wirelessly the image antenna 16 and the wireless image of the cab 5 through the wireless image transmitter 11 and the image antenna 16. Transmitting to the video monitor 21 via the receiver 20, the driver adjusts while confirming that the trolley 2 is moved to the upper portion of the salvaged through the video monitor 21.

When the movement of the trolley 2, the hook 3 and the CCTV camera 10 to the upper portion of the salvage is completed, the hook 3 is lowered to the position of the salvage. Even if the driver's field of view is not secured by the building while the hook 3 is descending, the present invention recognizes whether an obstacle exists and prevents a collision therebetween.

The driver operates the operation button 23 of the camera wireless controller 22 to operate the zooming function and the rotating function of the CCTV camera 10 while communicating through the number of signals on the ground and the radio, and thus, the driver can fix the salvage more quickly and accurately. The hook 3 can be adjusted in position.

When the lowering of the hook 3 is completed, the workers on the ground hang the salvage on the hook 3, and the driver checks whether the hanging work is completed through the video monitor 21, It is possible to check the correctness and start the ascension, and to quickly and accurately understand the surrounding situation during the lifting, which not only speeds up work but also prevents safety accidents perfectly.

In addition, similarly when lifting the lifting object lifted to the uppermost point to the target point, the image sensing device according to the present invention operates quickly through the video monitor 21 while operating the zoom lens and the rotator of the CCTV camera 10. To communicate the situation accurately.

According to the present invention constructed and functioning as described above, a closed-circuit television (CCTV) is installed in the tower crane, so that the tower crane driver located in the cab of the high altitude is grounded even if the visibility is not secured due to obstacles or long distances. In order to quickly and accurately grasp the size, location and surrounding situation of the salvage of the driver through the video monitor in the cab, the video signal can be wirelessly recovered to overcome the cable breakage caused by the quick linear motion of the trolley. Transmitting and receiving the control signal controlling the zoom lens and the rotor of the CCTV camera wirelessly, so that the CCTV camera can be used stably, greatly reduce the risk of safety accidents caused by the tower crane, can operate more convenient, lifting work The efficiency is greatly improved Indicating a very useful invention.

Claims (3)

A camera installed on the workbench of the trolley to photograph the work area, a wireless video transmitter electrically connected to the camera to wirelessly transmit data through an image antenna, and convert the signal of the wireless video transmitter into a video signal to monitor In a horizontal mobile tower crane comprising a wireless video receiver for outputting a video signal, The solar panel is installed on the workbench and converts sunlight supplied from the sun into a DC power source, a battery storing the DC current supplied from the solar cell, and a power controller relaying power supply to the camera and the wireless video transmitter. Tower crane wireless image sensing device comprising a solar cell system made. delete delete