Baseball is a kind of ball sport with strong collective and antagonism with the main characteristics of playing baseball. It is known as the “combination of athletics and wisdom”. It is a combination of wisdom and bravery, fun and collaboration. Group sports. It combines dynamics and statics with a clear division of labor. The team members not only emphasize personal wisdom and talent, but also must pay attention to strategy and tactics and cooperate with each other. Members have a clear division of labor and clear responsibilities, and they must actively cooperate with each other to help each other. If necessary, for the overall situation, individuals must be willing to sacrifice themselves.
With the rapid development of baseball, many countries around the world have formed very mature professional baseball events.
The lighting design and testing requirements of the baseball field are to meet the needs of different levels of competitions and better meet the needs of the market.
Throughout the process of lighting design of led baseball field, led baseball field can be attributed to the characteristics of high lighting requirements, poor geological conditions, and difficulty in implementation.
Baseball is a ball game in which 9 people are a party, using a bat and a ball on an outdoor court. Baseball is divided into an infield and an outfield. The main shape of the infield has a base on each of the four corners, and the infield is also called a “square.” The inner field is surrounded by the two borders of the critical outer field of the inner region and the other two borders of the outer region.
What are the lighting requirements for baseball fields?
The lighting of the baseball field is different from the lighting requirements of other stadiums. The area of the baseball field is about 1.6 times that of the football field. Generally speaking, the average illuminance of the inner field is higher than the average illuminance of the outer field by about 50%. Therefore, the uniformity of the outer field illuminance is a difficult point. The illuminance value at the junction of the field and the outside field. It is hoped that the illuminance values of the inner field and the outer field are designed to be significantly different, and the boundary line between the inner field and the outer field is designed to be a watershed of the illuminance value, so as to reduce the illuminance value of the outer field area adjacent to the inner field and reduce the illuminance value. The difference between the illuminance value of the arc-shaped edge area of the area and the outer field is used to improve the uniformity of the outer field illuminance. In the design, the projection point and beam angle of each led baseball field light must be selected and calculated one by one. If necessary, the height of the light pole must be adjusted to ensure that the various lighting indicators of the baseball field conform to the International Lighting Commission ( CIE) standard.
The design of the baseball stadium lighting system must not only meet the average vertical illuminance and the average horizontal illuminance, but also the uniformity of the vertical illuminance and the uniformity of the horizontal illuminance, as well as the ratio coefficient of the average vertical illuminance to the average horizontal illuminance. In addition, it is necessary to limit the value of the glare index, and choose a higher color rendering index and corresponding color temperature led baseball field lights light source, so as to meet the basic functional requirements of led baseball field lights, and ensure the normal skills of baseball players during night training and games. At the same time, it can clearly reflect the players’ instantaneous movements and sports postures, and can capture the trajectory of baseball in high-speed sports.
The main points of baseball stadium lighting boil down to:
- The diameter of the baseball is small, the exercise speed is fast, and it is difficult to capture the instantaneous change of the trajectory, so it needs enough horizontal illuminance and a certain height range of vertical illuminance.
- It is necessary to meet the illuminance requirements of the inner and outer fields of the baseball stadium, and conform to the uniformity and gradient relationship.
- According to the site environment, determine the number of light poles, the height of the poles, the type of lamps, the width of the beam and the number of lamps.
- The lighting design of the baseball stadium must not only meet the average vertical illuminance and the average horizontal illuminance, but also the uniformity and habit of the vertical illuminance, as well as the ratio coefficient of the average vertical illuminance and the average horizontal illuminance.
- The led baseball field lights must not have glare, and the color rendering index must be high. At the same time, it can clearly reflect the athletes’ instantaneous movements and sports postures during the TV broadcast, and can capture the baseball movement trajectory in high-speed sports.
Television broadcast standards for professional baseball:
The main difference between baseball field lighting and other sports lighting is that the position of the light pole and the relative position of the stadium are very strict. There are as many as 6-7 fixed camera positions on the baseball field, which are broadcast on major league baseball. The standard does not clearly state its illuminance numerical requirements, and its implementation process is more based on the horizontal illuminance requirements. After meeting the horizontal illuminance parameter requirements put forward by the Alliance, the effect of TV broadcasting can usually be well guaranteed.
The illumination requirements for Major League Baseball are:
1. Infield: horizontal illumination≥2500lx
2. Outfield: horizontal illumination≥2000lx
3. The color rendering index of the light source is ≥65
4. The color temperature of the light source is ≥3700K
What is the size of the led baseball field?
Baseball is a ball game in which 9 people are a party, using a bat and a ball on an outdoor court. Baseball is divided into an infield and an outfield. The main shape of the infield has a base on each of the four corners, and the infield is also called a “square.” The inner field is surrounded by the two borders of the critical outer field of the inner region and the other two borders of the outer region.
Baseball and softball are mostly outdoor courts. A baseball field is divided into an inner field and an outer field. The inner field is also called a square. The inner field is surrounded by two sides of the inner field facing the street and the outer field and the other two sides of the outer field. The size of the inner field is 27.5×27.5m, the outer field is fan-shaped, the distance from the home base to the middle and outer fields through the second base is at least 121.92m, and the area outside the outer field by 18.29m fences unexpectedly.
The lighting range of the baseball field is not only on the sports field, but also in the upper space of the field. There should be sufficient illumination in the area between the bowler and the catcher. In order to reduce the glare interference to the audience and increase the comfort of the visual environment, there should be an illuminated area of 7 m away from the outside of the stadium boundary. In order to reduce glare and increase the brightness of the space, the installation height of ordinary led baseball field lights should be greater than 28 m. The installation height of the led baseball field lights of the baseball field for major games should be greater than 35 m. Usually 6 light poles or 8 light poles are used to install luminaires. Lights can also be installed on the horse track of the awning above the auditorium. The light poles should be located outside the main visual range (20°) to reduce unnecessary glare.
Baseball’s infield size is standard, but the outfield size/area varies. The size of the site includes an out-of-bounds area of 4.6 meters (15 ft). The out-of-bounds area is considered to be part of the sports area and should be considered in the lighting design. Large and small league stadiums extend the outer outer area to the audience area, and the outer area can be gradually reduced in the direction of the outer court. The lighting area also needs to include alternate player area, player rest area and warm-up area.
The main problems existing in the design and sports of the existing baseball lighting system are the following aspects:
1. The position of the light pole is incorrect.
2. The led baseball field lights are not illuminated enough.
3. The illuminance ratio (ie uniformity) of the interior and exterior lights does not meet the requirements.
The inappropriate location of the lighthouse and the inappropriate aiming point of the lamps often lead to the illuminance ratio that does not meet the requirements, and the dirty or poor maintenance of the led baseball field lights leads to the lack of illuminance.
What are the lighting schemes for baseball stadiums?
The way of lighting the baseball field:
1. Baseball field lights can be arranged with 6 or 8 light poles, and baseball field lights can also be installed on the horse track above the audience.
2. The light poles of the baseball field are located outside the main viewing angle of 20° in the four base areas.
The way of lighting the softball field
1. Softball field lights should be arranged with no less than 4 light poles, and baseball field lights can also be installed on the horse track above the auditorium.
2. The light poles of the softball field should be located outside the range of 20° of the main viewing angle of the four base areas.
Details that need attention in the lighting of baseball and softball fields
1. In order to ensure that athletes have a good light environment and reduce shadows, the light requires three or four directions. The location of led baseball field lights, glare control, stadium lights, light beam extension and installation height are all required. The position of the stadium lights should be consistent with the direction of the game.
2. Glare control. Place the led baseball field lights outside the loyal sight of the athletes, and the triangular area extending from the baseline of each infield forms a 20° zone.
3. The led baseball field lights beam expands. The top of the defined beam of led baseball field lights should be at least 10° below the plane of the stadium lights.
In the design stage of the architectural scheme of the baseball stadium, the requirements of the lighting system design scheme should be considered at the same time. The lighting system should create a good light environment for users to ensure fast, accurate, safe and comfortable visual recognition. In order to ensure good viewing conditions, lighting indicators should be required according to different purposes of use. The lighting design should also consider the requirements of energy saving, safety maintenance, and Jianming testing.
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