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13 novembre 2017

Shape recognition using an ultrasonic sensor array

Catégorie : Stagiaire

Leti is an institute of CEA, a French research-and-technology organization with activities in energy, IT, healthcare, defence and security. Leti is located inside the minatec campus in Grenoble, and focuses on creating value and innovation through technology transfer to its industrial partners.

The LSSC is a laboratory of Leti's System Department which is specialised on signal processing and data fusion using various systems of sensors (inertial units, distance sensors, magnetometers, ultrasonic systems, strength sensors).


Ultrasonic sensors are used since many years in a variety of applications like medical imaging or robotic ranging for the most well known. With the advance of MEMS technology (MicroElectroMechanical Systems), they can now be integred in multiple environments and in some specific configurations, opening new perspective on their use for gesture recognition [1], fingerprint authentification [2], or shape analysis [3].

At CEA Leti, we are currently working on a 2D array of small ultrason transducers which can work both ways as emitter and receiver. The targeted application is the sidewalk detection for car park assistance; this raises as a general perspective the question of shape recognition using acoustic imagery techniques. There are several ways to probe an observed scene by emmiting acoustic pulses and recording to its echoes, and we would like to investigate those which could best fit our needs in terms of accuracy and required processing complexity.


The following technical points need to be addressed:


The candidate is expected to have a strong background in signal processing with a wish to perform experimentations as it will play an important role in this intership. He should be confortable with electronic acquisition devices (digital oscilloscope, generator, ...) and have good programming skills (python) either to process signals, but also to display his/her results.

keyword: acoustic, beamforming, array processing, experimentations, machine learning, python


[1]: https://swarmlab.eecs.berkeley.edu/projects/4684/ultrasonic-gesture-recognition

[2]: http://www.biometricupdate.com/201510/invensense-announces-new-ultrasonic-fingerprint-touch-sensor

[3]: http://cdn.intechopen.com/pdfs/37176/InTech-Shape_recognition_and_position_measurement_of_an_object_using_an_ultrasonic_sensor_array.pdf


Detailed CV, motivation letter and a recent scientific report (school project for example) should be sent to: Regis Perrier (regis.perrier@cea.fr).


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