KR101600980B1 - Wireless video surveilance system for forklift - Google Patents

Abstract

An embodiment of the present invention relates to a wireless video surveillance system for a forklift. According to the present invention, a camera image which used to be wired will be transmitted wirelessly in order to resolve the problem which was possessed by wired image transfer. By using the linkage with a sensor for measuring the horizontality and height of the forklift according to the present invention, a convenient operation of the forklift can be facilitated. To this end, an embodiment of the present invention includes: a camera prepared between the forks of the forklift for imaging the front side; a wireless video transmitter which has a sensor part on the fork and performs first signal processing by receiving a video signal and a detection signal output by the camera and the sensor part, while transmitting the video signal and the detection signal which are first-signal-processed; a wireless video receiver which receives the video signal and the detection signal from the wireless video transmitter and performs second signal processing, while transmitting the second-signal-processed video signal and detection signal; and a monitor prepared on the driver seat of the forklift to receive the video signal and the detection signal from the wireless video receiver. The sensor part includes a horizontal sensor for sensing the horizontality of the fork, a height sensor for sensing the height of the fork, and a motion detection sensor for detecting the motion of the fork. The wireless video transmitter enters a standby mode when a detection signal is not detected by the motion detection sensor for a predetermined period of time, and is terminated with power, while transmitting the detection signal received by the horizontal sensor and the height sensor through a low-power transmission part.

Description

[0001] WIRELESS VIDEO SURVEILANCE SYSTEM FOR FORKLIFT [0002]

One embodiment of the present invention relates to a wireless video surveillance system for a forklift.

When loading a load, the forklift must accurately and securely insert the pallet into the fork of the forklift. When loading a load, it is not easy for a skilled person. Also, if you do not insert the fork correctly when you load or move the load, if the loaded load falls and it breaks or falls to the person, it may cause personal injury. Conversely, even when the load is dropped, the load is covered by the driver's visibility, so there is a high risk of accidents and the user tries several times. In addition, when the forklift is moving, it is difficult to grasp the forward or rearward objects in the structure of the car.

Currently, in order to solve such a problem, there is a case where a wired rear camera used in a general vehicle is used. In this case, the fork is moved upward and downward, so that fixing of the wired line is not easy. Various methods have been devised to solve this problem, but the method is expensive and difficult to apply easily.

Registered Patent Publication No. 10-1471060 'Integrated wireless image capture device and video surveillance system using the same' Published Japanese Patent Application No. 10-2001-0044401 " Wireless video surveillance device of tower crane "

An embodiment of the present invention solves the problem that a wireless camera transmits an image of a wired wireless phone and wirelessly receives the wireless image, and works in conjunction with a sensor for measuring the horizontal and height of a fork, The present invention provides a wireless video surveillance system for a forklift that enables a forklift truck to be conveniently operated.

In addition, an embodiment of the present invention transmits and receives an image wirelessly by applying a wireless video transmission technology to a wired section between a camera and a monitor, and allows a driver to operate the forklift truck when the forklift truck is moved The present invention provides a wireless video surveillance system for a forklift, which enables a driver to make a judgment on the basis of the information by wirelessly connecting measurement values to the driver's seat by interlocking the sensors so as to be safe and convenient.

A wireless video surveillance system for a forklift according to an embodiment of the present invention includes a camera disposed between forks of a forklift to capture a forward image; A wireless video transmitter for receiving a video signal and a sensing signal output from the camera and the sensor unit and processing the first signal, and transmitting the first signal-processed video signal and the sensing signal; A wireless video receiver for receiving the video signal and the sensing signal from the wireless video transmitter and for performing a second signal processing and transmitting the second signal processed video signal and the sensing signal; And a monitor provided in a driver's seat of the forklift to receive and display the video signal and the sensing signal from the wireless video receiver, wherein the sensor unit includes a horizontal sensor for sensing a horizontal state of the fork, And a motion sensor for detecting movement of the fork, wherein the wireless video transmitter enters a standby mode when a sensing signal is not received from the motion sensor for a reference time, , And the sensing signal received from the horizontal sensor and the height sensor can be transmitted through the low power transmission unit.

The wireless video transmitter includes: a power supply unit for supplying power; A power supply switch for switching power supply to the signal transmission unit; A first signal processing unit for processing a video signal received from the camera; A signal transmitting unit for transmitting the signal processed video signal and the sensed sensing signal to the wireless video receiver; A low power transmission unit for transmitting a sensing signal received from the horizontal sensor and the height sensor to the wireless video receiver in a standby mode under the control of the first control unit; And a first controller for controlling operations of the components constituting the wireless video transmitter.

Wherein the wireless video receiver comprises: a signal receiver for receiving the video signal and the sensing signal from a signal transmission unit of the wireless video transmitter; A low power receiving unit for receiving a sensing signal received from the horizontal sensor and the height sensor from a low power transmission unit of the wireless video transmitter in a standby mode; A second signal processor for signal processing the received video signal and the sensing signal; A data output unit for transmitting the signal-processed video signal and the sensed signal to a monitor; And a second controller for controlling operations of the components constituting the wireless video receiver.

The low power transmission unit may include a beacon terminal.

The signal transmitting unit and the signal receiving unit may use a 2.4 GHz Frequency Hopping Spread Spectrum (FHSS) scheme.

The wireless video surveillance system for a forklift according to an embodiment of the present invention is applied to a forklift operation in which safety accidents frequently occur, thereby reducing safety accidents, reducing cargo damage upon loading and unloading (dropping a loaded cargo) It is possible to prevent safety accidents.

In addition, an embodiment of the present invention allows the driver to confirm the correct position when inserting the fork into the pallet, thereby shortening the working time and providing convenience.

1 is a view illustrating a wireless video surveillance system for a forklift according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating a state in which the wireless image transmitting unit of FIG. 1, the camera, and the sensors are connected.
3 is a diagram illustrating a state in which the wireless video receiving unit and the monitor of FIG. 1 are connected.
4 is a block diagram schematically illustrating the wireless video transmitter of FIG.
5 is a flowchart showing the operation of the wireless video transmitter of FIG.
6 is a block diagram schematically illustrating the wireless video receiver of FIG.
7 is a flowchart showing the operation of the wireless video receiver of FIG.

The terms used in this specification will be briefly described and the present invention will be described in detail.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term, not on the name of a simple term, but on the entire contents of the present invention.

When an element is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements as well, without departing from the spirit or scope of the present invention. Also, the terms "part," " module, "and the like described in the specification mean units for processing at least one function or operation, which may be implemented in hardware or software or a combination of hardware and software .

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

A wireless video surveillance system for a forklift according to an embodiment of the present invention receives an image from a camera mounted on a forklift, compresses the image, wirelessly transmits the image, wirelessly receives the signal, A radio image transmitter designed to have a function of transmitting images wirelessly, a function of reading sensor data installed inside and outside, and transmitting the radio waves to be received at a wireless image receiver side wirelessly, and a wireless image transmitter, The wireless video receiver includes a wireless video receiver designed to shut off the power of the wireless video transmitter when not in use for a while, to supply power during operation, and to allow the user to turn on the power of the transmitter when the user desires.

In the wireless video surveillance system for a forklift according to an embodiment of the present invention, a camera is installed as a method for preventing accidents and for facilitating loading and unloading of a forklift in frequent safety accidents, It is difficult to install due to the structure of moving forklift. Therefore, by solving this problem by applying wireless image transmitter and receiver using wireless image technology and further interlocking with sensors, it is possible to further enhance stability and convenience, The forklift can be managed.

FIG. 1 is a view illustrating a wireless video surveillance system for a forklift truck according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a state in which a wireless video transmitter, FIG. 4 is a block diagram schematically showing the wireless video transmitter of FIG. 1, FIG. 5 is a flowchart showing the operation of the wireless video transmitter of FIG. 4, FIG. 7 is a flowchart illustrating an operation of the wireless video receiver of FIG. 6. Referring to FIG.

1 to 3, a wireless video surveillance system for a forklift according to an exemplary embodiment of the present invention wirelessly transmits and receives video images by wirelessly transmitting wireless video data between a camera and a monitor, (Up and down movement and cargo loading and unloading) In order to make the driver safe and convenient, the sensors are interlocked and the measured values by the sensors are transmitted to the driver's seat by radio. And includes a camera 200, a wireless video transmitter 300, a wireless video receiver 400, and a monitor 500.

The camera 200 is provided between the fork of the forklift and captures a forward image. The camera 200 secures an accurate hole of the pallet when loading a cargo (cargo is loaded) Take a picture. The camera 200 uses a conventional CCTV camera, a PTZ (Pan Tilt Zoom) camera, and a camera that outputs an analog image, that is, a CVBS signal.

The wireless video transmitter 300 receives a value sent by the sensors installed inside and outside the forklift and sends it to the wireless video receiver by radio. The wireless video transmitter 300 receives an external camera image, compresses the image, In a wireless manner.

The sensors include sensors including a motion sensor 102, a height sensor 101 and a horizontal sensor 100 mounted inside and outside the wireless video transmitter 300.

The motion detection sensor 102 is installed inside the wireless video transmitter 300. When the motion of the fork is sensed by sensing the motion of the forklift fork, the motion detection sensor 102 supplies power to the wireless video transmitter 300, The wireless video transmitter 300 is turned off to provide the function of enabling the battery power to be used efficiently and for a long time when the present system is driven by the battery.

The height sensor 101 is installed outside the wireless video transmitter 300 and can measure the height of the forklift fork. The height sensor 101 reads the measured data from the wireless video transmitter 300 and wirelessly transmits the height value to the wireless video receiver To the driver), allowing the driver to know the contents.

In addition, the horizontal sensor 100 is a sensor that detects the inclination of the fork. In the sensor, information about the degree of inclination of the fork is sent to the wireless video transmitter 300, And send it to the wireless video receiver 400 side. This information value allows the fork of the forklift to always stay horizontal.

The wireless video transmitter 300 is a device that receives a video signal and a sensing signal output from the camera 200 and the sensor unit, processes the first signal, and transmits the first signal-processed video signal and the sensing signal.

More specifically, as shown in FIG. 4, the wireless video transmitter 300 includes a first signal processor (Video Decoder) 301 for receiving an analog video signal output from the camera 200 and converting the received analog video signal into a digital signal To a first on-chip (SoC) 303. The first control unit 303 has a function of compressing a video signal inputted as a CPU and receives a sensing signal sensed by the motion sensor 102, the height sensor 101 and the horizontal sensor 100.

The first control unit 303 activates a power supply switch 304 that supplies and cuts off power from the power supply unit 302 in order to reduce power consumption when there is no signal for a predetermined time in the motion detection sensor 102, .

The first control unit 303 controls a signal transmission unit (RF module) 305 and a low power transmission unit (Low Power Wireless Module) 306. At this time, the image received from the camera 200 is compressed by the first control unit 303 and wirelessly transmitted through the signal transmission unit 305.

The signal transmission unit 305 uses a Frequency Hopping Spread Spectrum (FHSS) scheme and uses a frequency of 2,4 GHz.

The low-power transmission unit 306 adopts a low power consumption wireless system such as BLE (Bluetooth Low Energy or Beacon), and is turned on with minimum power consumption during standby time when the forklift is not operated, The switch 304 is turned off to turn off the power. The low power transmission unit 306 transmits the sensing signal received from the height sensor 101 and the horizontal sensor 100 to the wireless video receiver 400. [ The low power transmission unit 306 operates the power supply switch 304 according to a control command signal related to power on / off received from the wireless video receiver 400 to the first control unit 303.

5, when power is applied to the wireless video transmitter 300 (S110), data is received from the motion sensor 102 (S120) do. Here, if motion is detected by the motion sensor 102, the power supply switch 304 is turned on to normally supply power to the whole. However, if it is determined that there is no movement due to the detection signal received from the motion detection sensor 102 for a predetermined time, the power supply switch 304 is turned off to enter the standby mode (S121) to interrupt the power supply. Here, when receiving a control command signal for turning on the power supply from the wireless video receiver 400 or detecting movement from the motion sensor 102, the power supply switch 304 is turned on again to supply power. At this time, when the normal power is supplied, the video signal is received from the camera 200 (S134), and the digital wireless transmission is performed in the 2.4 GHz FHSS manner through the signal transmission unit 305 (S136). Further, data received (S131, S132) from the horizontal sensor 100 or the height sensor 101 is transmitted through the low power transmission unit (S133).

The wireless video receiver 400 is located on the driver's seat side of the forklift and wirelessly receives a video signal coming from the wireless video transmitter 300 to decompress the compressed digital video data, , And a function of combining the received sensor value with an associative signal so that the image and the sensor value can be viewed on the same screen. In addition, when power is applied to the wireless video transmitter 300 forcibly, a corresponding signal can be sent, and the wireless video transmitter 300 converts the wireless signal to a wireless video transmitter 300.

The wireless video receiver 400 receives the video signal and the sensing signal from the wireless video transmitter 300, processes the second signal, and transmits the second signal-processed video signal and the sensing signal. 6, the wireless video receiver 400 includes a signal receiver (RF module) 403 for receiving a video signal transmitted from the wireless video transmitter 300, and a power receiver And receives a sensing signal received from the horizontal sensor 100 and the height sensor 101 from the low power transmission unit 306 of the wireless video transmitter 300 in the standby mode, A low power wireless unit 404, a second control unit (SoC) 402 for releasing the image compression signal and managing all operations, and a second signal processing unit 401 for releasing the compressed image .

Referring to FIG. 7, when the power is turned on (S210), the video signal transmitted from the wireless video transmitter 300 through the signal receiver 403 and the video signal (S220), and decompresses the image (S230). These signals are sent to a monitor 500 connected to a wired / wireless communication network and output an image through the monitor 500 (S240). When the operator wants to view the image, the remote power supply signal is transmitted to the low power transmission unit 306 (S225) to control the power of the wireless video transmitter 300 remotely.

The monitor 500 is provided in a driver's seat of a forklift and receives and displays a video signal and a sensing signal from the wireless video receiver 400. [ The monitor 500 may include a personal information terminal capable of inputting and outputting user information and transmitting and receiving data, such as a general monitor, a navigation system, and a smart phone.

The wireless video surveillance system for a forklift according to one embodiment of the present invention is applied to a forklift operation where frequent safety accidents occur, thereby reducing safety accidents and preventing damage to the cargo when the cargo is loaded and unloaded And prevent safety accidents therefrom. In addition, an embodiment of the present invention allows the driver to confirm the correct position when inserting the fork into the pallet, thereby shortening the working time and providing convenience.

The outer surface of the wireless video transmitter 300 and the wireless video receiver 400 of the wireless video surveillance system for a forklift may be coated with a composition for antifouling coating that can effectively prevent and remove the contaminants from being attached . The antifouling coating composition contains boric acid and sodium carbonate in a molar ratio of 1: 0.01 to 1: 2, and the total amount of boric acid and sodium carbonate is 1 to 10% by weight based on the total aqueous solution. The molar ratio of boric acid to sodium carbonate is preferably in the range of 1: 0.01 to 1: 2. When the molar ratio is out of the above range, the coating property of the base material is lowered or the coating film is removed due to increased moisture adsorption on the surface have. The boric acid and sodium carbonate are preferably used in an amount of 1 to 10% by weight based on the total amount of the aqueous solution of the composition. If less than 1% by weight, the coating property of the base material is deteriorated. If the amount is more than 10% by weight, . The substrate to which the composition for anti-fouling coating is applied is preferably glass, resin, ceramic, metallic material and a material in which an organic material or an inorganic material is coated on the substrate surface. In order to be used in the present invention, have. As the method for coating the composition on the substrate, a deposition method, a spray method, a flow method, rubbing, or the like may be used. However, when the substrate is large in size and applied in a mass production process of a curved surface, . When the coating composition of the present invention is used, the thickness of the final coating layer on the substrate is preferably 500 to 2000 Å, and more preferably 1000 to 2000 Å. When the thickness of the coating film is less than 500 ANGSTROM, there is a problem that it deteriorates in the case of a high-temperature heat treatment. When the thickness of the coating film is more than 2000 ANGSTROM, crystallization of the coating surface tends to occur. On the other hand, it is preferable to use water as a cleaning agent for removing the film applied on the substrate. Examples of the method include deposition in a washing water tank, removal by an ultrasonic device, and spraying by high-pressure spray, Is used.

As described above, the present invention is not limited to the above-described embodiment, but may be applied to a system for monitoring a for-truck wireless video surveillance system, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: Horizontal sensor 101: Height sensor
102: Motion detection sensor 200: Camera
300: wireless video transmitter 301: first signal processor
302: power source unit 303: first control unit
304: power supply switch 305: signal transmission unit
306: Low Power Transmission Unit 400: Wireless Video Receiver
401: second signal processing unit 402: second control unit
403: Signal receiving section 404: Low power receiving section
500: Monitor

Claims (5)

A camera provided between the forks of the forklift to photograph a forward image;
A wireless video transmitter for receiving a video signal and a sensing signal output from the camera and the sensor unit and processing the first signal, and transmitting the first signal-processed video signal and the sensing signal;
A wireless video receiver for receiving the video signal and the sensing signal from the wireless video transmitter and for performing a second signal processing and transmitting the second signal processed video signal and the sensing signal; And
And a monitor provided in a driver's seat of the forklift to receive and display the video signal and the sensing signal from the wireless video receiver,
The sensor unit includes a horizontal sensor for detecting the horizontal state or inclination of the fork, a height sensor mounted on the outside of the wireless video transmitter for sensing a height of the fork, a sensor mounted inside the wireless video transmitter, And a motion detection sensor for supplying power to the wireless video transmitter when the motion of the fork is detected and for blocking power to the wireless video transmitter if motion for a predetermined time is not detected,
The wireless video transmitter transmits a sensing signal received from the horizontal sensor and the height sensor through a low power transmission unit when the sensing signal is not received from the motion sensor for a reference time, ,
The wireless video transmitter
A power supply for supplying power;
A power supply switch for switching power supply to the signal transmission unit;
A first signal processing unit for processing a video signal received from the camera;
A signal transmitting unit for transmitting the signal processed video signal and the sensed sensing signal to the wireless video receiver;
A low power transmission unit for transmitting a sensing signal received from the horizontal sensor and the height sensor to the wireless video receiver in a standby mode under the control of the first control unit; And
A power supply switch for controlling the operation of each component constituting the wireless video transmitter and for supplying and cutting off power from the power supply unit in order to reduce power consumption when there is no signal for a predetermined time in the motion detection sensor, And a first control unit for compressing the image received from the camera and controlling the image transmission unit to wirelessly transmit the compressed image through the signal transmission unit,
The low-power transmission unit may include a beacon terminal. In the standby time when the forklift is not operated, the low-power transmission unit is turned on with minimum power consumption, and the other power supply switch is turned off to cut off the power. And a control unit for sending a detection signal received from the horizontal sensor to the wireless video receiver, activating a power supply switch by a control command signal related to power on / off received from the wireless video receiver,
The wireless video transmitter receives data from the motion detection sensor when power is applied thereto, and when the motion is detected by the motion detection sensor, the wireless video transmitter turns on the power supply switch, When it is determined that there is no movement due to the detection signal received from the motion detection sensor, the power supply switch is turned off to enter a standby mode to cut off the power supply and receive a control command signal to turn on the power supply from the wireless video receiver And a controller for receiving the video signal from the camera when the normal power is supplied and for receiving the video signal through the signal transmitting unit in the 2.4 GHz FHSS system, Wireless transmission, and the horizontal sensor or the height sensor The data received from and transmitted via the low-power transmitter,
Wherein the wireless video receiver is located on the driver's seat side of the forklift and wirelessly receives the video signal from the wireless video transmitter and decompresses the compressed digital video data so that the video image can be viewed through the monitor again, And a function of combining the sensed value of the received sensor with the video signal so that the video and the sensed value can be viewed on the same screen. When the power is forcibly supplied to the wireless video transmitter, the corresponding signal is wirelessly transmitted And transmitting the converted signal to the wireless video transmitter,
The wireless video receiver
A signal receiver for receiving the video signal and the sensing signal from a signal transmission unit of the wireless video transmitter;
A low power receiving unit for receiving a sensing signal received from the horizontal sensor and the height sensor from a low power transmission unit of the wireless video transmitter in a standby mode;
A second signal processor for signal processing the received video signal and the sensing signal;
A data output unit for transmitting the signal-processed video signal and the sensed signal to a monitor; And
And a second controller for controlling the operation of each component constituting the wireless video receiver,
The signal transmitting unit and the signal receiving unit use a 2.4 GHz frequency hopping spread spectrum (FHSS)
Wherein the wireless video receiver receives an image signal and a sensing signal sent from the wireless video transmitter through the signal receiver and performs decompression of the image when the power is applied, and the received signal is sent to a monitor connected to a wired / wireless communication network, And transmits the remote power supply signal to the low power transmission unit to remotely control the power of the wireless video transmitter,
The composition for anti-fouling coating is coated on the outer surface of the wireless image transmitter and the wireless image receiver, wherein the anti-fouling composition comprises boric acid and sodium carbonate in a molar ratio of 1: 0.01 to 1: 2, and the total of boric acid and sodium carbonate The content is 1 to 10% by weight based on the total aqueous solution, the thickness of the coated antifouling coating composition is 500 to 2000 ANGSTROM,
The substrate to which the composition for anti-fouling coating is applied may be any one of glass, resin, ceramic and metal materials, and a material having an organic or inorganic material coated on the surface of the substrate. And may be any of a dipping method, a spraying method, a flow method, and a rubbing method. Water removed as a cleaning agent for removing the film applied on the substrate can be removed by immersion in a washing water tank, removal by an ultrasonic device, Wherein the method comprises the steps of:
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