Xinhuanet, Beijing, February 19. The Beijing 2022 Winter Olympics is about to end. Recalling the amazing fireworks display at the opening ceremony, the "beautiful moment" made the world witness "Chinese-style romance" once again.
Over the bird's nest, fire trees and silver flowers, the "city of two Olympics" is a bright galaxy.
The Chinese "Start of Spring" and English "SPRING" come to announce the spring, the "Welcome Pine" welcomes guests and friends, the huge "Olympic Rings" rise into the sky, and the "ice flowers" and "snowflakes" are in full bloom, which outlines a beautiful Northland. scenery...
In this world-renowned fireworks show, the blooming of every "snowflake" is inseparable from the careful design of the designer, as well as the ingenuity and dedication of the technical team.
Dr. Cong Xiaomin, School of Mechanical and Electrical Engineering, State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, introduced in an interview that the technical team is like a bridge, and it is necessary to interpret the creative effects of the design proposed by the director's creative team, and "translate" the creative plan into a technical plan. Docking to the fireworks manufacturer, and assisting the manufacturer to carry out continuous testing and adjustment, and finally achieve satisfactory results.
Cong Xiaomin said that the technique of using fireworks to create patterns or characters in the sky is called three-dimensional pyrotechnics, and this technique has been widely used since the 2008 Beijing Olympics.
The principle is to compose the picture according to the effect of fireworks, decompose the picture into a dot matrix map that is enough to outline the pattern, and then refer to the actual demand, and send the effect medicine and effect parts to the corresponding points through different launching methods, so that they can be placed in a specific position. It burns or explodes at the point, thus realizing the pixel point.
When every point of the bitmap can be successfully put in place and all the pixel points are arranged, various creative effects of fireworks can be gorgeously presented in the night sky.
In order to uphold the concept of green, open, shared and honest hosting of the Winter Olympics, the director's creative team specially designed the concept of "green fireworks" in the fireworks design.
The fireworks design of the opening ceremony is firstly compressed from the length of the fireworks display. The entire fireworks display process is only 120 seconds in total, which greatly reduces the input of production materials and the pollution caused by the fireworks display.
Secondly, in order to solve the smoke generated when the fireworks are launched at low and medium altitudes, the products all use micro-smoke propellants, which reduces the smoke volume by nearly 80%.
In addition, in the arrangement, by means of link time, high and low altitude product coordination, etc., enough time is left for the smoke to dissipate, so that the residual smoke will not affect the presentation of the next fireworks effect.
The first participation of a third-party environmental monitoring department and on-site monitoring of the impact of fireworks on air quality under different meteorological conditions also provided an important reference for the design of the discharge process.
From the selection of product types, the adjustment of the fireworks launch angle, and the viewing effect on the site, the creative team, technical team and the discharge enterprise closely cooperate, and the test, adjustment and re-test are constantly repeated, and finally the two are "green" and "safe". , perfectly presented a gorgeous and environmentally friendly fireworks display at the opening ceremony.
The closing ceremony of the 2022 Beijing Winter Olympics will be held at the National Stadium on February 20. Fireworks will still be in full bloom at that time. Let us look forward to the gorgeous fireworks on the closing ceremony to shine again in the "city of double Olympics".