Have the strength and value, see how the US 3D-RADAR, which has been written into the "Civil Airport Pavement Field Test Specification", implements automated airport runway detection?
The importance of airport runways as areas where aircraft take off or land is a matter of safety. In addition to the strict specifications of the airport runway during its construction, it must be regularly tested after it is put into use to grasp the health status of the airport pavement to ensure flight safety is of great significance. The traditional two-dimensional ground penetrating radar has lower detection efficiency and longer time, and is gradually replaced by the 3D ground penetrating radar. The American 3D-RADAR three-dimensional ground penetrating radar system, which is the sole agent of Europe and the United States, has been written into the "China Civil Aviation Industry Standards-Civil Airport Pavement Field Test Regulations (MH / T5110-2015):
The GeoScope 3D ground penetrating radar system of 3D-Radar Company in the United States is mainly composed of a host, an antenna and related software. The detection test is configured with a ground-coupled antenna array DXG1212, which is 12 meters wide and 12 channels. The 3D radar has an ultra-wide frequency band of 200MHz-3000MHz. The resolution in shallow asphalt can reach 3cm. It can collect up to 12 lines of 3D ground penetrating radar data at a time. The line spacing is 7.5cm. Density data collection. How can the US 3D-Radar 3D ground penetrating radar system be written into the specification?
Can be written into the norms, of course, there is real effort. Compared with traditional pulsed radar systems, 3D-Radar ground penetrating radar uses innovative radar and antenna technology. It is a high-resolution three-dimensional underground imaging system. Compared with traditional ground penetrating radars on the market, its detection performance Has more advantages.
3D-Radar ground penetrating radar adopts advanced frequency stepping technology. Compared with traditional pulse radar, its advantages are mainly reflected in: (1) the frequency components output by the radar signal source can be accurately controlled, and each frequency The energy of the components is equal; (2) By controlling the bandwidth of the radar receiver, the noise can be effectively suppressed and the sensitivity can be improved; (3) The radar signal is a frequency domain signal, which can be easily processed and analyzed by using the frequency domain signal processing technology. The frequency scanning range of 3D-Radar GPR is 100MHz-3GHz, which is completely set by the user according to different applications. It can meet the requirements of different depth measurements and high resolution.
3D-Radar ground penetrating radar uses a unique antenna array technology to achieve three-dimensional imaging. The advantages of 3D imaging in detecting underground features and structural defects are obvious. The 3D-Radar ground penetrating radar's antenna array contains multiple pairs of electronically scanned antenna elements, where each pair of antenna elements is scanned sequentially and its coverage ranges from 200MHz to 3GHz. In actual work, users can collect data from 200MHz to 3GHz without changing the antenna. If a pulsed ground penetrating radar is used for the same detection, different antennas such as 200MHz, 400 MHz, 800 MHz, and 1600 MHz are required, and they are constantly replaced.
The robot platform is icing on the cake to realize automatic data acquisition. In order to verify the effect of the US 3D-Radar's GeoScope 3D ground penetrating radar system on the airport runway test application effect, the European and American geotechnical team conducted a detection test at a southwest airport on the early morning of July 23, 2017. The radar system tractor adopts the robot platform of Shanghai Guime Robotics Co., Ltd. to realize automatic data collection, the antenna moves smoothly, the line control is accurate, and the acquisition speed is controllable.
Satellite imagery shows ground penetrating radar measuring lines on taxiways and runways
Automated radar field data acquisition The time has come to witness the miracle! What is the data other than the appearance of the wind?
The test was conducted on the taxiway and runway of the airport.
Taxiway line distribution
Runway line distribution 3D-RADAR's powerful software analysis system "diagnoses" airport runways Taxiway
The taxiway is a concrete structure, and its surface is repaired in many places.
Actual photos of taxiway scenes, repaired radar data displayed in three places, clear interface between concrete and foundation
Location of the concrete floor shown by the profile (red line mark)
Horizontal reinforcement distribution inside the concrete plate.
Concrete slab transverse reinforcement position