Dedicated swimming pool needs professional lighting
Dedicated swimming pools need professional lighting-good water with good lights
In recent years, with the continuous development of my country's sports industry, there has been a climax of sports stadium construction in China, and many cities have begun to build high-level indoor sports stadiums. For different sports venues, the requirements for indoor lighting are also different. Among them, the indoor swimming pool involves the fluctuating water surface, and if the design is improper, it is easy to cause glare and other problems. Today, through the sorting out of the commonly used technical specifications for the lighting design of indoor swimming venues and the comparison with the corresponding foreign standards, I point out some problems that should be paid attention to in the lighting design of indoor swimming venues. I hope that it can provide you with some attention to the lighting design of swimming venues. Reference.
1. Illumination requirements
Including horizontal illuminance and vertical illuminance, with sufficient horizontal illuminance and vertical illuminance, the illuminance of the swimming pool site should meet the requirements of national standards.
In actual engineering, for some swimming venues that often hold major international competitions, higher illuminance standards are often adopted, such as requiring an average illuminance of 1500lx on the water surface, or an average illuminance of 1000lx on the vertical surface in the direction of the camera (water surface) to meet the requirements of the competition and Retransmission requirements. Except for the higher standards adopted by Japan, the standard values of illuminance adopted by other countries are lower than those of our country.
The lighting of swimming venues should also meet the illuminance standards of color TV transmission.
In addition to specific regulations on vertical illuminance and uniformity of illuminance, the requirements of various countries for color television relay lighting also set requirements on the color temperature and color rendering index of the light source.
2. Illumination distribution and brightness distribution
There should be uniform illuminance distribution and brightness distribution, and the uniformity of illuminance should meet the requirements of Article 3.1.4 of Chapter 3 in the National Standard of the People's Republic of China "Lighting Design Standard for Civil Buildings GBJ133-90" for the lighting uniformity of stadiums.
1. Illumination uniformity
In the main camera direction in the sports stadium, the ratio of the minimum vertical illuminance to the maximum value should not be less than 0.4, the ratio of the average vertical illuminance to the average horizontal illuminance should not be less than 0.25; the ratio of the minimum to the maximum horizontal illuminance of the venue should not be less than 0.5; The vertical illuminance of the auditorium in sports venues should not be less than 0.25 of the vertical illuminance of the venue.
In actual engineering, since it is necessary to prevent glare while meeting the requirements of illuminance uniformity, the calculated results are often difficult to meet the requirements of these two indicators at the same time. Therefore, the rationality of the lighting design of swimming venues must be ensured by selecting appropriate lighting distribution and reasonable lighting methods.
2. Brightness uniformity
In order to form a good viewing environment, in addition to stipulating the uniformity of illuminance, the uniformity of brightness should be emphasized. It is easiest to see in places with proper brightness distribution in the field of view. When the audience is watching swimming, their sight is moving. If the brightness distribution changes too much, and the viewing target changes frequently, it is easy to cause fatigue and discomfort. If the brightness is too uniform, it will make the environment too dull. Therefore, proper brightness uniformity is required.
3. Light color and color rendering requirements
It should have suitable light color and good color rendering. The light color of the light source used in the swimming pool is generally selected to match the color of daylight. At the same time, considering that the indoor color of the swimming pool is mostly cold, the light source with a color temperature of about 5000k or higher is often used. The color rendering index of the light source of the swimming pool should be greater than 65 according to the requirements of the national standard. However, in actual projects, considering the effect of color TV broadcasting, for some important swimming pools, the color rendering index of the light source is often required to reach about 85. However, the improvement of the color rendering index will bring about problems in the life of the light source, light efficiency, and price. Therefore, for ordinary swimming venues, Ra≥65 can meet the general TV broadcast requirements, and there is no need to blindly pursue the high color rendering index of the light source.
4. Glare control
Compared with other sports venues in the city, the swimming pool has its own special lighting design. The main difference is that the water surface of the swimming pool will produce waves when athletes swim, and the reflection of lights within the range of the waves will cause serious problems. The glare makes the spectator’s referees unable to see the athlete’s technical movements; at the same time, when the athlete is in danger, due to the glare, it may not be detected by people and cannot be rescued in time. Therefore, when we design the lighting, we should take this into consideration. Kind of glare control to a minimum. The light source should be effectively shielded to reduce the brightness of the lamp surface. You can refer to the relevant provisions of Appendix 5 "Luminaire Luminance Limit Curve" in "Industrial Enterprise Lighting Design Standard GB50034-92".
5. Lighting distribution
There should be a suitable lighting configuration (including the arrangement of the lamps and the light intensity distribution of the lamps), so that it can not only meet the glare limit requirements, but also better meet the illumination uniformity requirements, making it economical and applicable. Generally speaking, lamps with asymmetric light distribution are better than lamps with symmetric light distribution.
6. Lamp protection
Certain protective measures should be taken, such as the use of high-strength, impact-resistant lamp housings to prevent damage to the light source and lamps from causing harm to people.
Effective measures should be taken to eliminate the stroboscopic effect.
8. Why overhaul
The installation position of the lamps should be convenient for maintenance and overhaul. Due to the large space of the swimming pool, the amount of lamps and light sources is large. Therefore, when designing, the convenience of maintenance and repair should be fully considered. Generally, lamps are installed on the light bridge and the light bridge is used for inspection and repair.
9. Switch control
The switch control of the lamps should have a certain degree of flexibility to adapt to the different requirements of the contrast level during formal competitions and training.