Deck channel illumination optimization method

Abstract

The invention discloses a deck channel illumination optimization method, which comprises the following steps of: determining setting coordinates of an LED projection lamp according to setting directions of a deck channel and a ship, and determining coordinates of irradiation points to the deck channel according to a principle that the irradiation points are uniformly distributed; calculating an included angle between the set coordinate of the LED projection lamp and the coordinate of the deck channel irradiation point, and finding the luminous intensity of the included angle from the light distribution curve parameters of the corresponding LED projection lamp; calculating the actual point illumination of the LED projection lamp projected to the deck channel according to a point-by-point method in combination with the ship environment coefficient; and subsequently calculating the effective projection distance of the LED projection lamp and the actual point illuminance of each point of the deck channel within the effective projection distance, and if the ship society level illuminance standard is not met, adding a new LED projection lamp or optimizing the LED projection lamp type selection until the standard is met. The method has the advantages that the accuracy of lighting design and lamp type selection is improved, and the optimal balance point of energy conservation and cost control is found.

Description

Technical Field

[0001] The invention relates to the technical field of ship lighting, and in particular to a deck passage illumination optimization method. Background Art

[0002] LED lamps have been basically popularized in the field of daily lighting, and the indoor lighting of ships has basically completed the replacement of LED lamps. The application technology of such low-power LED lamps has been very mature. However, for the open-air areas of ships, especially the deck passage area that runs through the bow and stern of the ship, as an important place for crew passage and operation, the requirements and standards for illumination are relatively high. At present, the industry mainly uses high-power incandescent lamps, sodium lamps, halogen lamps, etc. as deck floodlights. These traditional lamps have high energy consumption and short lifespan. Some lamps will also produce toxic gas, causing environmental pollution and endangering the lives of crew members. Therefore, the popularization of high-power LED deck floodlights has become an inevitable trend.

[0003] When matching LED lamps with equivalent illumination, it was found that the light distribution curve and light-emitting principle of LED are quite different from those of traditional lamps. Although the light intensity at the projection center of 1000W sodium lamps and 180W LED lamps of the same light intensity is consistent, the LED light intensity decays rapidly with the increase of the irradiation angle, and the peripheral light is relatively dim. Therefore, when calculating the deck illumination, the LED lamps cannot be simply replaced. The illumination calculation method of traditional lamps is used to calculate the LED lamps, and the result will show obvious uneven illumination, poor visual experience, and the illumination cannot meet the industry standard. Summary of the invention

[0004] The purpose of the present invention is to provide a deck channel illumination optimization method, by improving the illumination calculation method based on traditional lamps, thereby improving the lighting design of LED floodlights and the accuracy of lamp selection, and finding the best balance between illumination effect and cost control under the premise of meeting industry illumination standards.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: A deck channel illumination optimization method, characterized in that it comprises the following steps: According to the setting direction of the deck passage and the ship, the three-dimensional coordinate system of the ship is constructed, the number of preset LED floodlight types is determined respectively, and then the setting coordinates of each LED floodlight are determined, and the coordinates of the irradiation points to the deck passage are determined according to the principle of even distribution of irradiation points; Determine the connecting line between the two points according to the setting coordinates of the LED floodlight and the coordinates of the deck channel illumination point, calculate the angle θ between the connecting line and the vertical height line of the floodlight, and find the luminous intensity I corresponding to the angle from the light distribution curve parameters of the corresponding LED floodlight θ ; According to the point-by-point method, combined with the ship environmental coefficient and the above parameters, the actual point illumination E projected by the LED floodlight onto the deck channel is calculated. 实 ; Subsequent calculation verifies the effective projection distance D of the LED floodlight. If it is not within the effective projection distance D, readjust the setting coordinates of the LED floodlight. If it is within the effective projection distance D, calculate the actual point illumination E of each point on the deck channel within the effective projection distance D. 实 , if E 实 If the industry illumination standards are not met, the number of new LED floodlights should be increased or the selection of LED floodlights should be optimized until the standards are met.

[0006] Preferably, the point-by-point method calculates the point illumination E from the floodlight to the projection point h The calculation formula is: (1) Where l is the distance between the floodlight and the projected point, E h It is the illumination of the deck passage at the projected point.

[0007] Preferably, the point-by-point method is combined with the ship environmental coefficient to calculate the actual point illumination E projected by the LED floodlight onto the deck passage 实 The calculation formula is (2) Where M is the ship environmental factor.

[0008] Preferably, the ship environment coefficient M is positively correlated with the environmental salinity and the ambient temperature, and the calculation formula of the ship environment coefficient M is: (3) Where N 盐 is the actual salinity value of the ship area, N 标 is the standard salinity value of the ship area, T 温 is the actual temperature value of the ship area, T 标 It is the standard area temperature value of the ship.

[0009] Preferably, the calculation formula for the effective projection distance D of the LED floodlight is: (4) L is the horizontal distance between the floodlight and the irradiation point, h is the height of the floodlight installation point, ɑ is the irradiation angle of the floodlight, is the beam angle of the floodlight.

[0010] Preferably, the floodlights are mainly arranged in two areas, namely: the floodlights at the two wings of the top floor of the residential area illuminate the channel to the front, and the floodlights at the bow mast illuminate the channel to the rear.

[0011] Preferably, through the calculation formula of the effective projection distance D of the LED floodlight, the selection principle of the LED floodlight is determined as follows: a diffuse light type LED floodlight is used for close-range projection in the deck channel, a spotlight type or medium type LED floodlight is used in the middle area, and a spotlight type LED floodlight is used for long distances.

[0012] In summary, the beneficial effects of the present invention are: unifying and optimizing the existing deck channel illumination calculation method, thereby improving the accuracy of the lighting design and lamp selection of LED floodlights, and being able to find the best balance between illumination effect and cost control while meeting industry illumination standards, thus saving a lot of design and construction time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a flow chart of a deck channel illumination optimization method of the present invention. DETAILED DESCRIPTION

[0014] The specific implementation modes of the present invention are further described below, and these embodiments do not constitute a limitation of the present invention.

[0015] A deck channel illumination optimization method, such as Figure 1 As shown, the following steps are included: The three-dimensional coordinate system of the ship is constructed according to the setting direction of the deck passage and the ship, and the number of preset LED floodlight types is determined respectively. Then the setting coordinates of each LED floodlight are determined, and the coordinates of the irradiation points to the deck passage are determined according to the principle of even distribution of irradiation points.

[0016] Take the midship line in the direction of the ship length as the X-axis, the stern axis of the ship as the origin of the X-axis, the midship point in the direction of the ship width as the origin of the Y-axis, and the upper deck as the origin of the height Z-axis. Take an 82,000-ton bulk carrier as an example. The main deck passage is located on the line of Y=±15m. Install the floodlights S1 and S2 on the port side of the top floor of the living area, close to the Y=﹢15m line of the main deck passage. Set the position coordinates (X, Y, Z) of S1 and S2 as: (31.5m, 14m, 16.4m), (31.5m, 16m, 16.4m), respectively. Determine the coordinates P of the irradiation point to the deck passage according to the principle of average distribution of the irradiation point. A , P B They are: (55m,15m,0m), (85m,15m,0m) respectively.

[0017] Determine the connecting line between the two points according to the setting coordinates of the LED floodlight and the coordinates of the deck channel illumination point, calculate the angle θ between the connecting line and the vertical height line of the floodlight, and find the luminous intensity I corresponding to the angle from the light distribution curve parameters of the corresponding LED floodlight θ .

[0018] The light distribution curve parameters of LED floodlights are provided by the manufacturer. Taking a 90W, 36° diffuse light LED floodlight as an example, the following table 1 shows the light intensity parameters corresponding to the beam angle: Table 1 90W, 36° beam angle LED floodlight light distribution curve parameters

[0019] The actual point illumination projected by the LED floodlight onto the deck passage is calculated based on the point-by-point method combined with the ship environmental coefficient.

[0020] Subsequent calculation verifies the effective projection distance D of the LED floodlight. If it is not within the effective projection distance D, readjust the setting coordinates of the LED floodlight. If it is within the effective projection distance D, calculate the actual point illumination E of each point on the deck channel within the effective projection distance D. 实 , if E 实 If the industry illumination standard is not met, the number of new LED floodlights should be increased or the selection of LED floodlights should be optimized until the standard is met. For example, floodlight S3 can be added near the Y=﹢15m coordinate, and S1, S2, and S3 can be oriented to the deck channel illumination point P based on the principle of even distribution of illumination points. A , P B , P C That is, (55m, 15m, 0m), (70m, 15m, 0m), (85m, 15m, 0m), until the luminous intensity that meets the standard is calculated, or the selection of LED floodlights is optimized until the standard is met.

[0021] Point-by-point method to calculate the point illumination E from the floodlight to the projection point h The calculation formula is: (1) Where l is the distance between the floodlight and the projected point, E h It is the illumination of the deck passage at the projected point.

[0022] The point-by-point method combined with the ship environmental coefficient calculates the actual point illumination E projected by the LED floodlight onto the deck passage 实 The calculation formula is (2) Where M is the ship environmental factor.

[0023] The ship environmental coefficient M is positively correlated with the environmental salinity and ambient temperature. The calculation formula of the ship environmental coefficient M is: (3) Where N 盐 is the actual salinity value of the ship area, N 标 is the standard salinity value of the ship area, T 温 is the actual temperature value of the ship area, T 标M is the standard regional temperature value of the ship. The LED floodlights of the deck passage are installed in exposed areas and are easily affected by seawater, temperature and other environmental factors and wear. According to different routes, the principle is that the higher the salinity, the smaller the M value. For example, the temperature in the Arctic and Antarctic regions is low, the evaporation is small, and the salinity is low, the M value is set at 0.97. The rainfall near the equator is high and the salinity is low, the M value is set at 0.95. In the trade wind belt near 20 degrees north and south latitude, the weather is dry, the rainfall is less than the evaporation, the salinity is high, and the M value is the lowest at 0.93. In addition, the lower the latitude and the higher the temperature, the smaller the M value, and the M value is the smallest in the polar regions.

[0024] The angle between the setting coordinates of the LED floodlight and the coordinates of the irradiation point of the deck passage is the same as the angle θ between the line connecting the floodlight and the projected point and the vertical height line of the floodlight. The two floodlights S1 and S2 on the port side of the top floor of the living area and the two points P on the port side deck passage irradiated A , P B For example, according to the coordinates of S1 and S2, calculate S1 and P A , S2 and P B The corresponding θ value, corresponding to P A , P B luminosity.

[0025] The calculation formula for calculating the effective projection distance D of LED floodlights is: (4) L is the horizontal distance between the floodlight and the irradiation point, h is the height of the floodlight installation point, ɑ is the irradiation angle of the floodlight, is the beam angle of the floodlight. Through the calculation formula of the effective projection distance D of the LED floodlight, the selection principle of the LED floodlight is determined as follows: the diffuse light type LED floodlight is used for the close-range projection of the deck channel, the spotlight type or medium type LED floodlight is used for the middle area, and the spotlight type LED floodlight is used for the long distance. The illuminated area is within the effective projection distance of the floodlight, and the illumination value of the illuminated area is above 8lux, which meets the industry illumination standard.

[0026] The present invention unifies and optimizes the existing deck channel illumination calculation method, thereby improving the lighting design of LED floodlights and the accuracy of lamp selection. It can find the best balance between illumination effect and cost control under the premise of meeting industry illumination standards, saving a lot of design and construction man-hours.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be deemed to fall within the protection scope of the technical solution of the present invention.

Claims

1. A deck channel illumination optimization method, characterized in that: The following steps are involved: According to the setting direction of the deck passage and the ship, the three-dimensional coordinate system of the ship is constructed, the number of preset LED floodlight types is determined respectively, and then the setting coordinates of each LED floodlight are determined, and the coordinates of the irradiation points to the deck passage are determined according to the principle of even distribution of irradiation points; Determine the connecting line between the two points according to the setting coordinates of the LED floodlight and the coordinates of the deck channel illumination point, calculate the angle θ between the connecting line and the vertical height line of the floodlight, and find the luminous intensity I corresponding to the angle from the light distribution curve parameters of the corresponding LED floodlight. θ ; According to the point-by-point method, combined with the ship environmental coefficient and the above parameters, the actual point illumination E projected by the LED floodlight onto the deck channel is calculated. 实 ; Subsequent calculation verifies the effective projection distance D of the LED floodlight. If it is not within the effective projection distance D, readjust the setting coordinates of the LED floodlight. If it is within the effective projection distance D, calculate the actual point illumination E of each point on the deck channel within the effective projection distance D. 实 , if E 实 If the industry illumination standards are not met, the number of new LED floodlights should be increased or the selection of LED floodlights should be optimized until the standards are met.

2. A deck channel illumination optimization method according to claim 1, characterized in that: The point-by-point method calculates the point illumination E from the floodlight to the projection point h The calculation formula is: （1） Where l is the distance between the floodlight and the projected point, E h It is the illumination of the deck passage at the projected point.

3. A deck channel illumination optimization method according to claim 2, characterized in that: The point-by-point method combined with the ship environmental coefficient calculates the actual point illumination E projected by the LED floodlight onto the deck passage 实 The calculation formula is （2） Where M is the ship environmental factor.

4. A deck channel illumination optimization method according to claim 1, characterized in that: The ship environmental coefficient M is positively correlated with the environmental salinity and the ambient temperature. The calculation formula of the ship environmental coefficient M is: （3） Where N 盐 is the actual salinity value of the ship area, N 标 is the standard salinity value of the ship area, T 温 is the actual temperature value of the ship area, T 标 It is the standard area temperature value of the ship.

5. A deck channel illumination optimization method according to claim 1, characterized in that: The calculation formula for the effective projection distance D of the LED floodlight is: （4） L is the horizontal distance between the floodlight and the irradiation point, h is the height of the floodlight installation point, ɑ is the irradiation angle of the floodlight, is the beam angle of the floodlight.

6. A deck channel illumination optimization method according to claim 1, characterized in that: The floodlights are mainly arranged in two areas, namely: the floodlights at the two wings of the top floor of the residential area illuminate the channel to the front, and the floodlights at the bow mast illuminate the channel to the rear.

7. A deck channel illumination optimization method according to claim 5, characterized in that: Through the calculation formula of the effective projection distance D of the LED floodlight, it is determined that the selection principle of the LED floodlight is to use a diffuse light type LED floodlight for close-range projection in the deck channel, a spotlight type or medium type LED floodlight for the middle area, and a spotlight type LED floodlight for long distances.

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