EP 1295246 A1 20030326 - ACCURATE INTERACTIVE ACOUSTIC PLATE
Title (en)
ACCURATE INTERACTIVE ACOUSTIC PLATE
Title (de)
INTERAKTIVE AKUSTISCHE BERÜHRUNGSEMPFINDLICHE PRÄZISIONSPLATTE
Title (fr)
PLAQUE ACOUSTIQUE INTERACTIVE DE PRECISION
Publication
Application
Priority
- FR 0102088 W 20010629
- FR 0008372 A 20000629
Abstract (en)
[origin: WO0201490A1] The invention concerns a device for acquiring the position co-ordinates of a source of mechanical waves optionally generated by impacting the surface of a plate (PLQ) of finite dimensions comprising a set of acoustic sensors (PZT00 to PZT11) each formed by a pair of piezoelectric transducers (PZTa, PZTb) facing each other on either side of the plate, the device including processing means for determining the co-ordinates of the source by analysing the difference in propagation time of the acoustic waves generated by the source to the different sensors. Said device is characterised in that the processing means comprise combined with each sensor (PZT00 to PZT 11) a respective electronic circuit including means mounted in cascade for digitizing the amplified signal around a predetermined frequency, associated with means for limiting the digitization to a time window starting before the acoustic waves reach a sensor and ending when the acoustic waves have reached said sensor.
IPC 1-7
IPC 8 full level
G06F 3/033 (2006.01); G06F 3/043 (2006.01)
CPC (source: EP US)
B32B 17/10036 (2013.01 - EP US); B32B 17/10761 (2013.01 - EP US); G06F 3/0433 (2013.01 - EP US)
Citation (search report)
See references of WO 0201490A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0201490 A1 20020103; WO 0201490 A9 20020919; AU 7071101 A 20020108; EP 1295246 A1 20030326; FR 2811107 A1 20020104; FR 2811107 B1 20021018; US 2003066692 A1 20030410; US 6933930 B2 20050823
DOCDB simple family (application)
FR 0102088 W 20010629; AU 7071101 A 20010629; EP 01949585 A 20010629; FR 0008372 A 20000629; US 7033302 A 20020611