ES programme: INCO-COPERNICUS
The objective of the project
To develop multichannel ultrasonic sonar based on the binaural approach with following features:
- Simultaneous determination of position of multiple targets;
- Robust operation in the sophisticated and noisy environment;
- Reliable detection of the reflected signals in the wide dynamic range;
- Simulation of sonar performance.
Operation principle of the developed system
The system consists of:
- 4 ultrasonic transmitting transducers (E1-E4);
- 5 ultrasonic receivers (R1-R5);
- Electronic units for generation of driving coded signals;
- Amplification of the received signals;
- Parallel signal processors
- Ultrasonic signals are transmitted by two single side-looking transducers (E1,E4) and two front looking electronically steered honeycomb arrays (E2,E3), each of which consists of 3 MURATA 40 kHz transducers;
- The received signals in each receiving channel are converted into a digital form by 8 bits 250 kHz sampling frequency A/D converters;
- The sensor developed enables to detect various objects (walls, 90o corner type reflectors, furniture) and to measure their coordinates on-line up to 5 m.
- R.Kažys. Advanced Ultrasonic Sonars for Navigation of Mobile Robots. Automation 2001. Przemyslowy Instytut Automatyki I Pomiarow. Warszawa. 2001. 24-40.