Elo Touch Solutions, Inc.

Sensitive Object

Centre National De La Recherche Scientifique

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Institut National De La Sante Et De La Recherche Medicale

Sorbonne Université

Université Paris Diderot-paris 7

Ecole Superieure De Physique Et De Chimie Industrielles De La Ville De Paris

Tyco Electronics Services Gmbh

Ros Kiri Ing

Mathias Fink

Olivier Schevin

Jean-Pierre Nikolovski

Thomas Similowski

Franck Benhamouda

Remi Duheille

Stefan Catheline

Nicolas Quieffin

Nathan Jeger-Madiot

Alexandre LeBlanc

Jean-Michel Linotte

A method for detecting movements of a plurality of points (P) of a surface (), comprising a measuring step during which an incident ultrasonic wave is emitted into the air towards the surface and an ultrasonic wave reflected into the air by the surface () is detected. During the measuring step, each measuring point is illuminated by the incident ultrasonic wave at a multiplicity of angles of incidence, and the reflected ultrasonic wave is detected by a network of receiving transducers () comprising a plurality of ultrasonic receiving transducers (). The movements of the surface are determined at a measuring point by determining a delay and/or a phase shift between two beam-forming signals for said measuring point.

Method and acoustic device for measuring surface movements

The present invention relates to a method for determining an acoustic response attributed to a location of an impact, in particular a touch event, on a surface of an object including at least one transducer comprising the steps of: a) receiving an acoustic signal from at least one transducer, wherein the signal corresponds to a predetermined excitation (E) at at least one location on the surface; b) determining an acoustic response based on the acoustic signal received in step a); and c) determining the acoustic response attributed to at least one location on the surface different to the location of the predetermined excitation based on at least two different acoustic responses determined in step b).

Method and a touch sensing device for implementing the method

A method for determining the location of an impact on a surface () comprising N acoustic sensors (), transmitting a sensed signal s(t) to a processing unit () comprises the following steps (a) computing P intercorrelation products (b) calculating P inverse Fourier transforms p'(u) (c) computing for each area k, P(u)=&#x3a3;P&#x2032;(u&#x2212;&#x3c4;); d) finding k, where a characterizing value of P(u) is greater than a given threshold value.

Method for determining the location of impacts by acoustic imaging

A method for determining the position of impacts on an object comprising two acoustic sensors, and N active areas of said object, comprises the steps of: (a) receiving two acoustic signals S(t) and S(t); (b) calculating a sample signature function SIG(&#x3c9;)=S(&#x3c9;)&#x2212;S(&#x3c9;)*, where S(&#x3c9;) and S(&#x3c9;) are the respective Fourier transforms of S(t) and(t), (c) comparing SIG(&#x3c9;) with N predetermined reference signature functions SIG(&#x3c9;) corresponding to the predetermined area j for j from 1 to N; (d) determining the active area in which the impact occurred, on the basis of the comparison of step (c).

Method for determining the position of impacts

For locating a touch on a tactile surface belonging to an object, mechanical waves are made to propagate in the object and these mechanical waves are picked up. Certain characteristics of the signal picked up are compared to a library of reference characteristics, and the position of the touch is deduced from this comparison.

Method for locating a touch on a surface and device for implementing the method

A method for determining the locations of at least two impacts Fand Fon a surface using one or more sensors S, i=1 to n, with n being the number of sensors, and the impacts Fand Fgenerating a signal being sensed by the one or more sensors, wherein each sensor provides a sensed signal s(t), i=1 to n, with n being the number of sensors. To be able to determine simultaneous impacts of different amplitudes the method includes identifying the location x of one impact, and determining a modified sensed signal s'(t) for each sensor in which the contribution due to the identified impact is reduced and which is based on a comparison, in particular a correlation, of each of the sensed signals s(t) and a predetermined reference signal r(t) corresponding to a reference impact Rat location j. The method can also be based on couples of sensed signals.

Method for determining the locations of at least two impacts

An automatic gain control circuit including a variable gain amplifier () adapted to receive a received signal (R) and to output an amplified signal (A) to an analog to digital converter (), and a gain controller () which is connected to said variable gain amplifier () for receiving said amplified signal (A) and for controlling a gain of said variable gain amplifier (). The gain controller () is adapted to determine an occurrence of a threshold event each time the amplified signal (A) has reached a predetermined threshold, decrease the gain of the variable gain amplifier () at each occurrence of a threshold event, measure a delay since the last threshold event, increase the gain of the variable gain amplifier () if the delay is greater than a delay specified value and if the gain of the variable gain amplifier () is not maximum.

Automatic gain control circuit

An access control installation adapted for controlling access from a first zone to a second zone, said installation comprising: at least one separating panel separating the first and second zones, said separating panel having at least one moving closure element () adapted for selectively opening or closing an opening; at least one opening actuator () adapted for causing the closure element () selectively to prevent or to allow access via the opening; and a control circuit () for controlling the opening actuator. Said installation further comprises at least one sound sensor () fastened to the separating panel on the same side as the second zone and adapted for detecting knocks on the first surface of said separating panel, and the control circuit () is adapted for: recognizing a predetermined code represented by a particular sequence of knocks on the first surface; and controlling the opening actuator as a function of the recognized code.

Acoustically-controlled access control installation and an access control device for such an installation

Method for locating an impact on a surface (), in which acoustic sensors () pick up acoustic signals s(t) generated by the impact and the impact is located by calculating, for a number of reference points of index j, a validation parameter representative of a function: PROD(&#x3c9;)=&#x3c6;S(&#x3c9;) &#x3c6;R(&#x3c9;)*&#x3c6;S(&#x3c9;)*&#x3c6;R(&#x3c9;) . . . &#x3c6;S(&#x3c9;)*&#x3c6;R(&#x3c9;) where: &#x3c6;S(&#x3c9;) and &#x3c6;R(&#x3c9;)* are complex phases of S(&#x3c9;) and of R(&#x3c9;), for i=i, i, . . . , i, indices denoting sensors, S(&#x3c9;) and R(&#x3c9;) being the Fourier transform of s(t) and r(t), r(t) being a reference signal corresponding to the sensor i for an impact at the reference point j, p being a non-zero integer no greater than N/2.

Method for locating an impact on a surface and device for implementing such a method

A man-machine interface method comprising generating physical interactions with active zones () belonging to an interface object (), the active zones being associated with predetermined items of information, detecting the active zones where interactions occur by measuring at least one physical magnitude, and associating each detected interaction with the corresponding predetermined item of information. The active zones are defined for a predetermined finite length of time and they are then deactivated at the end of said predetermined length of time, and when interactions with the interface object are detected while the active zones are deactivated, the active zones are automatically redefined as a function of the first detected interactions.

Man-machine interface method and device

Apparatus and methods for locating an impact point on a surface of an object. The object is provided with an acoustic sensor that senses the impact from the acoustic waves that are generated when the object is subjected to the impact. The location of the impact on the surface of the object is determined by a recognition step that includes a comparison of the sensed signal to one or more predetermined signals. Each predetermined signal represents an active zone on the surface of the object. A predetermined signal corresponds to the sensed signal when the impact causing the sensed signal is generated in the active zone represented by the predetermined signal. The impact is associated with the active zone represented by a predetermined signal when the sensed signal and the predetermined signal sufficiently correspond to each other.

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Paris, France

Ros Kiri Ing