Vibroacoustic Airport Ground
Movement Control System
Intended Use
Vibroacoustic Airport Ground Movement Control System is a means of non-cooperative surveillance designed to work autonomously or as part of A-SMGCS.
Its functioning is based on recording acoustic waves propagating over ground surface. The acoustic waves are then recorded by a distributed vibroacoustic sensor designed on the base of extended optical fiber.
The system ensures:
- automatic detection of moving objects on runways and taxiways;
- measurement of coordinates and trajectory parameters of moving objects;
- separate tracking of moving objects and building their trajectories;
- identification of moving objects based on the principle of "Propeller Plane – Jet Plane – Vehicle";
- recording of take-off and touchdown points on the runway;
- detection of runway and taxiway overrun;
- generation of information and its issuing to users via approved protocols;
- documenting coordinate and trajectory data from objects moving on the runway and taxiway;
- real-time control of the system’s technical status;
- archiving and storing system operating results.
Operation Principle
The system operates based on the following concept:
- Elastic acoustic waves propagating in the soil affect the fiber optic cable
- Modulation of the reflected laser signals occurs
- Demodulation of the reflected signals is carried out with selection of the acoustic wave at discrete points of the fiber optic cable (range gates Δl = 5m)
- Primary measurement results are processed with object’s coordinates and speed are detected
The coherent reflectometer operates based on the effect of inverse Rayleigh scattering of the coherent radiation in a single-mode optical fiber.
Advantages
- unlimited controlled area length. Taking into account modularity of the system, 100 km (in some cases - up to 150 km) is intended for a single logical unit of the system, in case of total absence of electricity in the controlled segment;
- free optical fibers available for establishing high-speed communication channels;
- absolute resistance to any interference (the system is non-affected by electromagnetic fields);
- absence of false alarms due to natural and/or technological noises;
- the system is unaffected by weather conditions (precipitation, snow, etc.);
- continuous analysis of the state of an object, immediate response to an impact;
- high sensitivity and accuracy of detecting the impact location;
- concealed installation (underground laying of the cable sensor).
Characteristics
| Probability of moving object detection | At least 0,9 | |
| Time of moving object detection, s | Not exceeding 1,5 | |
| Update period of coordinate information, s | Not exceeding 0.5 | |
| Accuracy of axial coordinates measurement, m | Not worse than 7 | |
| Accuracy of speed measurement of moving objects, m/s | Not worse than 5 | |
| Time of receiving the coordinates of the object, s | Not exceeding 2 | |
| False trajectory coefficient | Not exceeding 0,01 |
Engineer’s Workstation Display
Operator’s Workstation Display
