KR20130108886A - Led module control apparatus for underground parking lot - Google Patents

Abstract

PURPOSE: An LED module lighting control device for an underground parking lot reduces unnecessary power consumption by lighting a part of LED modules in normal and lighting all the LED modules when a car enters the underground parking lot. CONSTITUTION: An image detection unit (110) photographs an image in a predetermined region of an underground parking lot. An image processing unit (120) obtains a distance value (S1) from the image detection unit to an actual object. A parking lot illumination control unit (130) outputs multiple switching signals to control the illuminance of the parking lot. An illumination unit (140) includes LED modules including a turned-on LED group and multiple turned-off LED groups. The illumination unit successively turns on the turned-off LED groups according to the increase or decrease of the distance value. [Reference numerals] (110) Image detection unit; (120) Image processing unit; (130) Parking lot illumination control unit; (140) Illumination unit

Description

LED lighting apparatus lighting control device for underground parking lot {LED module control apparatus for underground parking lot}

The present invention relates to a LED lighting fixture lighting control device for underground parking, specifically, only a part of the plurality of LED modules constituting the LED lighting fixtures in everyday life and all LED modules to light when entering a person or car to reduce unnecessary power consumption. In addition, the present invention relates to a LED lighting fixture lighting control device for an underground parking lot that can prevent a safety accident in an underground parking lot.

There are various kinds of general parking lot such as elevator, multi-layer circulation, horizontal circulation, plane reciprocating, puzzle parking, two-stage parking, steel frame holding.

Parking lot in group residences, such as large apartment complexes, has to be installed in many lighting devices, causing a lot of power consumption, which is a major cause of the increase in maintenance costs.

In particular, light in a space such as an underground parking lot is used not only as a means of creating a space image by determining the quality and character of the underground parking lot, but also plays a role of eliminating psychological anxiety and preventing safety accidents in the underground parking lot.

Therefore, it is necessary that the lighting inside the parking lot is designed to be energy-saving type. However, in order to prevent the safety accident of the vehicle, the main point of the design should be to secure sufficient illumination compared to the same energy consumption.

According to the prior art, the energy-saving lighting and facility control system of the underground parking lot consists of 5 rows of horizontal and 10 rows of fluorescent lamps. By installing a heat sensor that can be identified, when a person or a car appears, the lights around it turn on, and when a person or a car passes, the lamp is automatically turned off after a certain time to save energy in the underground parking lot.

That is, the microcontroller unit performs a function of a CPU that controls and controls a plurality of LCMs, and identifies a person or a vehicle due to a heat sensor, and is controlled by a light control module (LCM) of the microcontroller unit to which the heat sensor is connected. All of the lights are turned on and turned off after a certain period of time.

However, such a parking lot lighting system employs a dimming circuit system, which is expensive and complicated in structure and expensive to manufacture.

In addition, in order to reduce power consumption, when lighting the spots instead of the entire fluorescent lamp, there may be a safety accident of a person or a car in a dark place. In particular, CCTV is too difficult to shoot because the area where a safety accident of a person or a car has occurred is too dark to troubleshoot accidents.

The present invention for solving the conventional problems as described above usually light only a part of the plurality of LED modules constituting the LED light fixtures for underground parking lot and all LED modules when entering the car to reduce unnecessary power consumption while underground It is to provide a LED lighting device control device for an underground parking lot that can achieve safety in a parking lot.

The present invention for achieving the above object includes an image sensing unit for capturing an image of a predetermined area in the underground parking lot, and a subject pattern in the image to obtain a distance value from the image sensing unit to the actual subject. And an LED module including a plurality of LED groups that are turned off and a lighted LED group and an image processing unit configured to set a window area to calculate the area value of the set window area, and to obtain the distance value corresponding to the area value. And an illumination unit for dimming and lighting the plurality of dimmed-off LED groups sequentially according to the increase and decrease of the distance value.

According to the present invention, in a state in which no car enters the underground parking lot, only a part of the plurality of LED light fixture modules for the underground parking lot constituting the light fixture may be turned on so that all the underground parking lot LED light fixture modules are turned on when the vehicle enters. While reducing unnecessary power consumption, it is possible to prevent safety accidents in underground parking lots.

1 is a block diagram showing the overall configuration of a lighting control device according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating an internal configuration of the image processor shown in FIG. 1.
3 is a diagram schematically illustrating a window extraction process and a window calculation process performed by the image processor illustrated in FIG. 2.
FIG. 4 is a block diagram illustrating an internal configuration of the parking lot lighting control unit and the lighting unit shown in FIG. 1 in detail.

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

1 is a block diagram showing the overall configuration of the LED lighting fixture lighting control device for an underground parking lot according to an embodiment of the present invention.

Referring to FIG. 1, the LED lighting fixture lighting control device 100 (hereinafter, a lighting control device) for an underground parking lot according to an embodiment of the present invention includes an image sensing unit 110, an image processing unit 120, and a lighting control unit 130. ) And an illumination unit 140.

The image detecting unit 110 is a camera installed adjacent to the lighting unit 140 installed in the underground parking lot and photographs a predetermined area in the underground parking lot. The image sensing unit 110 outputs an image of the predetermined area in frame units. Although not particularly limited, the image sensing unit 110 may be a closed circuit television (CCTV), a charge-couple device (CCD), or a complementary metal oxide semiconductor (CMOS) camera. Meanwhile, in the present invention, the image sensing unit 100 may be a stereo camera unit configured by combining two or more image sensors. As described above, the stereo camera configured by combining two or more image sensors may significantly improve the recognition rate by calculating the absolute size of a subject such as a vehicle.

The image processor 120 may select a window area (W1, W2, W3: W1 <W2 <W3 of FIG. 3) including a subject such as a vehicle or a person within the image frame acquired by the image detector 110. The distance value S1 from the camera 110 to the vehicle is output in real time using the extracted window area. Also, the image processor 120 may detect a vehicle light source S2 indicating an on / off state of a light source such as a headlight, a taillight, a brake, or the like through the brightness information (or distribution information of pixel gray scale values) in the extracted window area. Is detected and output. In an embodiment of the invention, the subject is described as being limited to a vehicle. The image processor 120 will be described in detail below.

The parking lot lighting controller 130 receives a distance value S1 and the vehicle light source state value S2 from the image processing unit 120, and controls a plurality of switching signals SW1 to SW4 to control the illumination of the parking lot lighting. Outputs

The lighting unit 130 is configured to provide lighting in the underground parking lot, but is not particularly limited, but may be a plurality of LED modules, each LED module may be composed of a plurality of LEDs. When the lighting unit 130 does not recognize the movement of the vehicle according to the switching signals SW1 to SW4 applied from the parking lot lighting control unit 130, only some LED modules are dimmed or lit, or when the movement of the vehicle is recognized. As the vehicle approaches the camera, the LED light fixture modules for all underground parking lots can be dimmed and turned on sequentially to reduce safety and reduce the unnecessary power consumption.

The description of the parking lot lighting control unit 130 and the lighting unit 140 will be described in detail with reference to FIG. 4 below.

Hereinafter, an image processing process performed by the image processor 120 will be described in detail.

FIG. 2 is a block diagram illustrating an internal configuration of the image processor illustrated in FIG. 1, and FIG. 3 is a diagram schematically illustrating a window extraction process and a window calculation process performed by the image processor illustrated in FIG. 2.

Referring to FIG. 2, the image processor 120 extracts a motion region including a vehicle in an image frame, and detects a distance value S1 from the camera 110 to the vehicle by using the extracted motion region. The vehicle detects an on / off state of a light source such as a headlight, a taillight, a brake, etc. through brightness information (or distribution information of pixel gray scale values) in the movement area.

To this end, the image processor 120 may include an image converter 121, a window extractor 122, a window area calculator 123, a distance calculator 124, a lookup table 125, and a vehicle light source detector 126. It includes.

The image converting unit 121 receives an image frame received from the image detecting unit 110 in units of frames and converts the image frame into a pre-processing image that is robust to changes in lighting and the like. Although not shown in the drawing, the image converter 121 stores the previous image in frame units in order to receive the image frame in frame units, and outputs the stored previous image in frame units when the current image is input. Frame memory may be provided.

As shown in FIG. 3A, the window extractor 122 sequentially scans the preprocessed image output from the image converter 121 from the top to the bottom of the screen using a predetermined window size W1. When the average value of the grayscale values (or preprocessing coefficient values) of all the pixels included in the preprocessed image scanned at the predetermined window size W1 is calculated and this average value is larger than the preset reference grayscale value, the corresponding window is displayed. It determines that there is, and calculates the coordinate information of the determined rectangular vertices (a, b, c, d) of the corresponding window. There may be a variety of techniques for determining the pattern of the vehicle, for example, an ad-boost technique used for the face detection pattern may be used.

The window area calculator 123 uses the coordinate information of the rectangular vertices a, b, c, and d of the window W1 transmitted from the window extractor 122 to determine the area value of the window W1. Calculate

The distance calculator 124 calculates a distance value S1 corresponding to the area value transmitted from the window area calculator 123 with reference to the lookup table 125 and transmits the distance value S1 to the lighting controller 130. The look-up table 125 is a kind of memory in which the area of the window including the vehicle pattern and the data of the distance value from the camera to the actual vehicle are learned in the form of a table, and the distance calculator 124 is the window area. The distance value 123 mapped to the address value is read from the lookup table 125 using the area value transferred from the calculator 123 as a memory address value.

When the actual vehicle moves toward the camera or vice versa away from the camera side, the distance value calculated from the distance calculator is varied. That is, when the subject (vehicle, person, etc.) approaches the camera, the size of the vehicle pattern captured on the screen increases, so that the window size set to include the increased vehicle pattern will also increase. Accordingly, the vehicle window extracting unit 122 extracts a window including all of the increased size of the vehicle pattern, as shown in FIG. 3B, and then the window area calculating unit 123 is increased in size. The window area value increased according to the movement of the subject (vehicle, person, etc.) is obtained by using the rectangular vertex of the increased window with reference to the lookup table. That is, the distance calculator 124 may calculate the distance value corresponding to the movement of the vehicle in real time by calculating the distance value corresponding to the increased window area with reference to the lookup table 125.

The distance value S1 from the camera to the vehicle may calculate the distance value from the camera to the vehicle using a distance sensor such as an infrared sensor or a radar, but in this case, the cost due to the addition of the sensor increases, which is not preferable. Can not do it. However, in the embodiment of the present invention, it is possible to simply calculate the distance value through the above image processing process.

The vehicle light source detector 126 detects an on / off state of a light source such as a headlight, a taillight, a brake, etc., through the brightness information (or distribution information of pixel gray scale values) in the extracted window area.

Specifically, the vehicle light source detecting unit 126 sequentially scans the window area determined by the vehicle window extracting unit 122 to have a vehicle pattern from the top to the bottom at a preset sub window size. Subsequently, when the average value of the gray values of all the pixels in the scanned sub window area is larger than the gray values of all the pixels in the entire window area, the corresponding sub window area is an area having a higher luminance value than the remaining areas in the window area. This area may be determined as a light source area such as a headlight, taillight, brake, or the like of the vehicle. That is, it can be seen that the vehicle has entered the parking lot while the light source of the vehicle is turned on. The vehicle light source detection unit 126 outputs this determined result as the vehicle light source detection value S2.

Hereinafter, the lighting control process of the lighting according to the image processing result described above will be described in detail.

FIG. 4 is a block diagram illustrating an internal configuration of the parking lot lighting control unit and the lighting unit shown in FIG. 1 in detail.

Referring to FIG. 4, the lighting controller 130 receives the distance value S1 from the distance value calculator S1 of the image processor 120, and if the light source of the vehicle is detected as a result of the image processing, the vehicle light source detection value. You will be prompted to enter (S2).

The lighting controller 130 is a configuration for controlling and managing the overall operation of the lighting unit 140. The lighting control unit 130 may be a kind of microcomputer, and above all, the lighting control unit 130 may be configured according to the size of the distance value S1 received from the image processor. The switching signals SW1 to SW4 are sequentially output. For example, when the image processing unit 120 sequentially outputs the first to fourth distance values that gradually decrease as the subject (vehicle, person, etc.) moves toward the camera, the illumination controller 130 may apply the first distance value. Accordingly, the first switching signal SW1, the second switching signal SW2 according to the second distance value, the third switching signal SW3 according to the third distance value, and the fourth switching signal SW4 according to the fourth distance value. ) In this case, when the lighting controller 130 further receives the vehicle light source detection value S2 according to the processing result of the image processor, it does not output any switching signal. That is, when entering an underground parking lot with a light source such as a headlight or a taillight of a vehicle turned on, the present invention automatically recognizes it through an image processing process, and the lighting controller does not output any switching signal according to the recognition result. .

The lighting unit 140 includes a power supply unit 142, a driving unit 144, an LED module 146, and a plurality of switching units 148A to 148D.

The power supply unit 142 supplies AC power for supplying power to the LED module 146.

The driving unit 144 converts the AC power into DC power and may be an A / D converter.

The LED module 146 is configured to illuminate an underground parking lot by receiving DC power through the driving unit 144. The LED module has a fifth LED group 146E interposed therebetween, as shown in FIG. The first to fourth LED groups 146A to 146D are arranged in a matrix form.

The plurality of switching units 148A to 148D may include a first switching unit 148A and a second switching signal SW2 for switching a connection between the first LED group 146A and the driving unit 144 according to the first switching signal SW1. The second switching unit 148B for switching the connection between the second LED group 146B and the driver 144 according to, and between the third LED group 146C and the driver 144 according to the third switching signal SW3. And a fourth switching unit 148D for switching the connection between the fourth LED group 146D and the driver 144 according to the third switching unit 148C for switching the connection and the fourth switching signal SW4. The fifth LED group is connected to the driver 144 through the node N1. Accordingly, the corresponding switching unit is turned on according to the size of the distance value S1 output from the distance value calculating unit, and the corresponding LED group is turned on by being supplied with a DC power supply. Keep it on until it's on. As a result, as the subject (vehicle, person, etc.) approaches the camera, the LED module turns on sequentially when each LED group constituting the LED is turned on closest to the camera. On the contrary, when the subject (vehicle, person, etc.) moves away from the camera, the lit mode LED group is sequentially dimmed off, so that only the fifth group maintains the dimming lighting state.

If the vehicle enters the underground parking lot with the light source such as headlights, taillights or brakes turned on, the camera recognizes this and the first to fourth LED groups 146A to 146D maintain the dimming off state, Only LED group 146E remains dimming on. By doing so, all LED modules are turned on when entering a subject (vehicle, person, etc.), thereby reducing unnecessary power consumption and preventing safety accidents in the underground parking lot.

Claims (5)

An image sensor for capturing an image of a predetermined area in the underground parking lot;
In order to obtain a distance value from the image sensing unit to a real subject, a window area including a subject pattern in the image is set, and an area value of the set window area is calculated to calculate the distance value corresponding to the area value. An image processing unit to obtain; And
An LED module including a dimmed LED group and a dimmed off LED group, wherein the illumination unit sequentially dims and lights the dimmed off LED group according to the increase or decrease of the distance value;
LED lighting fixture lighting control device for underground parking, including a.
The method of claim 1, wherein the lighting unit,
When the vehicle light source including the "headlight", "taillight", "brake light" of the vehicle is detected by the image processing unit, the underground parking lot that maintains the unlit state of the plurality of dimmed off LED groups LED lighting fixture lighting control device.
The image processing apparatus according to claim 2,
Scanning the window area into the sub-window area, and when the average gray value of the pixels constituting the scanned sub window area is larger than the average gray value of all the pixels constituting the window area, determining that the vehicle light source is detected. LED lighting fixture lighting control device for underground parking lot.
The image processing apparatus according to claim 1,
And a memory storing a distance value previously learned according to the area value of the window area in the form of a look-up table.
According to claim 1, Further comprising a lighting control unit for controlling the lighting of the lighting unit in accordance with the distance value,
Wherein the illumination control unit includes:
A plurality of switching signals are sequentially output according to the increasing distance values, thereby sequentially turning on the plurality of switching units for switching the connection between the plurality of LED groups and a driving power source. Control unit.

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