Application of infrared thermal camera and laser birds expelling equipment in airports

1.  Project requirements

 With the improvement of ecological environment and the improvement of people's awareness of protecting birds, more and more birds. This has brought disaster to the world and China's military and civilian aviation industry. When the aircraft takes off or lands at the airport, the powerful airflow of the engine is very easy to be inhaled to damage the engine blade, resulting in a serious impact on aviation safety. Bird damage is therefore one of the most important hidden dangers affecting flight safety.

In order to protect aviation safety and maintain the safety of passengers' property and lives, the airport has taken various measures to expel birds. Such as: expelling bird scarecrow, inflatable, inflatable man, firecrackers, firecrackers, burst sound expel bird, gas gun, expel bird agent, expel shotgun, expel bird Falcon, expel bird car and other means, these means have played a certain effect. In recent years, the International Civil Aviation Organization has recommended the use of laser bird expel in the Airport Service Manual, which is a revolution in the world's military and civilian airports and aviation fields. It has been proved that this large automatic laser bird expel can reduce the harm of birds in the military and civilian aviation industry by 42%.

2.  Infrared thermal imager and laser-bird-expelling equipment solutions

The laser bird expel equipment uses the characteristics of birds being highly sensitive to the green spectrum, and uses the green laser beam after beam expansion and collimation to continuously sweep the airport runway and its surrounding area. The birds are stimulated by the bright green laser beam and fly away from the protected area of the airport for survival response, as shown in Figure 1 and Figure 2. It creates a permanent dangerous area, affecting the ecological environment where the airport and its nearby birds live, rest and forage, and stimulating birds to find new and safe habitats. Fundamentally prevent and prevent the occurrence of bird collision aircraft accidents.

Expelling bird integrated instrument, equipped with high performance infrared thermal imager, (click here to see details ) can be completely no light, or light condition is very poor night, dawn, haze days, using thermal imaging technology, clear detection in the sky, grass, woods of various birds, through the calibration of the laser transmitter, accurate continuous shooting across the airport grass and the runway. Over time, it will affect the ecological environment that the airport and its nearby birds depend on for survival, habitat and forage, making the birds gradually have fear, and finally stay away from the airport, and fundamentally prevent and prevent the accident of birds hitting planes.

3.  Operating characteristics and principle of the equipment

Combined with the integrated bird expel instrument, the highest-end night bird watching system and the latest linear laser bird expel device, the bird expel operator has since realized the efficient night observation and expel integration operation. It is the world's first most advanced integrated system designed and developed specially for bird expel.

In order to test the applicability of the product, the bird expel integrated instrument was tested in the relevant places.

Figure 1. A "rod" -shaped scanning laser beam

Figure 2 The bird senses the laser beam and flies away

 Figure 3 Laser spectrum detection map

Thermal imaging system is through through the infrared radiation of infrared optical system will scenery infrared radiation focus to convert infrared radiation energy to measure the physical quantity of device: infrared detector, infrared detector to strength of radiation signal into the corresponding electrical signal, and then through amplification and video processing, form for human observation video images.

Vigorous flight of birds requires vigorous metabolism. Therefore, the body temperature of birds is stable and higher than the environment: 40 ± 2℃. In addition, under the feather cover, the still air forms a good insulation layer. Therefore, so the infrared radiation of birds is stronger than the human surface, which is a good infrared radiation source. Under the infrared thermal imager, birds are easily found and imaged compared to non-febrile targets.

Watching birds at night and detecting birds hidden in trees and grass, infrared thermal imaging is the best choice.

Figure 4 Birds detected by infrared thermal imaging

 Figure 5 Schema

Using a green laser at a wavelength of 532nm, ornithologists have proved that the bird eye is the most sensitive to a laser beam of this size. As shown in Figure 3. Different dashed colors in Fig represent different birds.

For birds, vision is the most sensitive, especially for a green laser with a wavelength of 532nm. Laser bird equipment using this characteristic, working with a diameter 152mm, wavelength of 532nm "rod" green laser, the laser specification is 532nm / 500 ~ 600 mW, simulate biological visual reflection conditions, green laser rod sweep, birds like see a green stick, in order to achieve the effect, is currently more effective automatic laser bird system.

The laser bird expel emits a striking secondary green laser for visual safety, which scares the bird and runs away. Its green laser beam can sweep 3000 meters of runway and grass, only 5-10 minutes. The product is suitable for night bird expelling work in airports, orchards, farmland and other places.

Figure 6 A sensitivity plot of birds to the visible spectrum

4.  Project comprehensive benefit analysis and summary

Compared with the traditional bird expelling equipment, the laser automatic bird flooding device has the characteristics of large effective range, good bird effect and high long-term comprehensive cost performance. The test shows that the laser automatic bird expel device can reduce 40%~80% in the action area of the device. The analysis of the comprehensive benefits is shown in Table Table 1.

The experiment proves that the effect of the bird expelling equipment produced is ideal, which is more advanced than the previous means. It greatly improves the technology of driving the birds at the airport and the practical effect of driving the birds.

Table 1 Comprehensive benefit analysis of airport bird expeling equipment