Baseball Stadium Lighting Design Requirements
1. Calculation of illumination and uniformity of internal and external fields
The baseball stadium lighting is different from the lighting requirements of other courts. The area of a baseball stadium is approximately 1.6 times that of a football field. The shape of the stadium is fan-shaped.
The difference in illumination values between the inside and outside fields is very different. Generally speaking, the average illumination of the infield is higher. The average illuminance in the field is about 50%, so the uniformity of the illuminance in the external field is difficult, that is, the illuminance at the junction of the infield and the outfield is taken into account.
It is expected that the illuminance values of the infield and the outfield will be designed to have significant differences, and it is more desirable to divide the boundary between the infield and the outfield into the watershed of the illuminance value, thereby reducing the illuminance value of the outfield area adjacent to the infield, and reducing the area The difference between the illuminance of the arc-shaped edge of the field is used to increase the illumination uniformity of the external field. At the time of design, the projection point and beam angle of each lamp must be selected and calculated one by one.
If necessary, the height of the lamppost must be adjusted to ensure that the various lighting indicators of the ballpark conform to the International Commission on Illumination (CIE) standards. And related standards for domestic venues.
Baseball field lighting design not only needs to satisfy the average vertical illuminance and the average horizontal illuminance, but also must reach the proportionality coefficient of the vertical illuminance uniformity and the horizontal illuminance.
In addition, it is necessary to limit the value of the glare index, select a higher color rendering index and the corresponding color temperature of the light source, so as to achieve the basic functional requirements of the light baseball field.
It ensures the normal skills of baseball players during night training and competition, and at the same time ensures that when the color television is broadcast, it clearly reflects the athlete’s instantaneous movements and movements and movement posture, and can capture the trajectory of the baseball in high-speed sports.
2, determine the projection point and glare limit
The limitation of glare can be achieved by many factors such as the determination of the projection point, the adjustment of the height of the light pole, the selection of the light beam angle of the light fixture, and the like. The four-bar shoot in the arc of the baseball field is facing the homefield’s home base, so determining the vertical illuminance value will also easily cause glare to the catcher.
Therefore, to limit the glare index of a baseball stadium is a key point in lighting design. It must be the placement of a lamp and a lamp, calculations one after another, and then one side of the modification, until a satisfactory value is calculated.