FR3028655B1 - Control device, method for operating such a device and audiovisual system - Google Patents

Control device, method for operating such a device and audiovisual system Download PDF

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FR3028655B1
FR3028655B1 FR1461092A FR1461092A FR3028655B1 FR 3028655 B1 FR3028655 B1 FR 3028655B1 FR 1461092 A FR1461092 A FR 1461092A FR 1461092 A FR1461092 A FR 1461092A FR 3028655 B1 FR3028655 B1 FR 3028655B1
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control
function
light beams
optical sensor
signal
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FR3028655A1 (en
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Claude Francis Juhen
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Claude Francis Juhen
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    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10HELECTROPHONIC MUSICAL INSTRUMENTS
    • G10H1/00Details of electrophonic musical instruments
    • G10H1/02Means for controlling the tone frequencies, e.g. attack, decay; Means for producing special musical effects, e.g. vibrato, glissando
    • G10H1/04Means for controlling the tone frequencies, e.g. attack, decay; Means for producing special musical effects, e.g. vibrato, glissando by additional modulation
    • G10H1/053Means for controlling the tone frequencies, e.g. attack, decay; Means for producing special musical effects, e.g. vibrato, glissando by additional modulation during execution only
    • G10H1/055Means for controlling the tone frequencies, e.g. attack, decay; Means for producing special musical effects, e.g. vibrato, glissando by additional modulation during execution only by switches with variable impedance elements
    • G10H1/0553Means for controlling the tone frequencies, e.g. attack, decay; Means for producing special musical effects, e.g. vibrato, glissando by additional modulation during execution only by switches with variable impedance elements using optical or light-responsive means
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10HELECTROPHONIC MUSICAL INSTRUMENTS
    • G10H2220/00Input/output interfacing specifically adapted for electrophonic musical tools or instruments
    • G10H2220/155User input interfaces for electrophonic musical instruments
    • G10H2220/405Beam sensing or control, i.e. input interfaces involving substantially immaterial beams, radiation, or fields of any nature, used, e.g. as a switch as in a light barrier, or as a control device, e.g. using the theremin electric field sensing principle
    • G10H2220/411Light beams

Abstract

The control device (10) comprises: means for generating at least two optical paths traversed by non-parallel light beams (110a and 110b) comprising at least one optical sensor (115) and at least one transmitter (105a or 105b) of at least one light beam, - means (145) for measuring the speed (150) of an object passing through at least two light beams as a function of a signal (120) issuing from at least one sensor optical device representing the cutting of the optical paths by the object, - means for estimating (125) the longitudinal position (130) of the crossing of the object as a function of a signal coming from at least one optical sensor representing the cutting of the optical paths by the object of at least two non-parallel light beams and - control means (135) called "position control means" of a parameter value (140) of an audiovisual effect in function the estimated longitudinal position.

Description

Field of the invention

The present invention relates to a control device, a method of operating such a device and an audiovisual system. The present invention applies to the field of contactless control devices.

More particularly, the present invention applies to electronic musical instruments. State of the art

Contactless control devices are mainly control devices on presentation of an object or by interruption of a light beam, such as a laser for example. These control devices allow you to switch from one state to another, such as opening a door, or putting a device into operation.

Modulations of intensity, sound or light, for example, use a potentiometer and require contact with the user. These devices allow modulation of an intensity. These devices exclude the possibility of switching from one state to another over the range of intensities offered without going through all the intermediate intensities.

With regard to contactless musical instruments, US Pat. No. 8,835,739 discloses a device which makes it possible to play sounds recorded beforehand by interrupting lasers. The device disclosed in patent FR 2 777 107 makes it possible to produce sounds by interrupting a laser by means of a rod. The wand interrupts the laser for the first time to play the sound and a second time to interrupt the sound. The velocity of the rod being measured by the device which is the subject of patent FR 2 777 107, the sound produced is more or less loud as a function of this velocity. A sequence of sounds is prerecorded and the sound played, for example a note, is beyond the control of the user.

Object of the invention

The present invention aims to remedy all or part of these drawbacks. To this end, according to a first aspect, the present invention relates to a control device which comprises: - means for generating at least two optical paths traversed by non-parallel light beams comprising at least one optical sensor and at least one transmitter at least one light beam, - means for measuring the speed of an object passing through at least two light beams as a function of a signal coming from at least one optical sensor representing the cutting of the optical paths by the object , - means for estimating the longitudinal position of the passage through the object as a function of a signal coming from at least one optical sensor representing the cutting of the optical paths by the object of at least two non-light beams parallel and - control means called "positional control means" of a parameter value of an audiovisual effect as a function of the estimated longitudinal position. The advantage of these embodiments is to have several different commands depending on each estimated longitudinal position, the user can, for example, create a melody or control different devices, such as visual effects devices, depending on the estimated longitudinal position.

In addition, such a device can be used to control a large number of devices. As such a device is configurable and configurable, the device object of the present invention can have different uses.

In embodiments, the device which is the subject of the present invention comprises control means called "speed control means" of a parameter value of an audiovisual effect as a function of the measured speed.

These embodiments have the advantage of modifying the intensity or the speed of a parameter value of an audiovisual effect controlled by the positional control means for example.

In embodiments, the device which is the subject of the present invention comprises: - means for detecting the direction of cut of at least two optical paths by the object as a function of at least one signal leaving at least one optical sensor representing the breaking of the optical paths by the object of at least two light beams and - control means called “directional control means” of a parameter value of an audiovisual effect as a function of the direction detected. The advantage of these embodiments is to control two parameter values of an audiovisual effect for the same position of cut of the optical paths by the object as a function of the direction of cut.

In embodiments, the direction of cut of the optical paths by the object is detected as a function of at least one signal coming from at least one optical sensor representing the cut of the optical paths by the object of at least three light beams and the directional control means control at least one parameter value of at least one audiovisual effect as a function of two components of a vector representative of the detected direction.

A parameter value of an audiovisual effect controlled as a function of two components of a vector representative of the detected direction has the advantage of having more possibilities of parameter values. In addition, each component of the vector representative of the detected direction can control a parameter value of a separate audiovisual effect.

In embodiments, the direction of cut of the optical paths by the object is detected as a function of at least one signal coming from at least one optical sensor representing the cut of the optical paths by the object of at least three light beams defining a volume and the directional control means control at least one parameter value of at least one audiovisual effect as a function of three components of a vector representative of the detected direction.

These embodiments have the advantage of having more possibilities of parameter values of a controlled audiovisual effect. In addition, each component of the vector representative of the detected direction can control a parameter value of a separate audiovisual effect.

In embodiments, the speed is measured as a function of the duration of breaking of a signal coming from at least one optical sensor representing the breaking of the optical paths by the object of at least one light beam and of a predetermined dimension of the object. The advantage of these embodiments is to require only two optical paths traversed by light beams. The energy consumption of the device is therefore reduced.

In embodiments, the measurement of the speed of the object is based on a signal coming from at least one optical sensor representing the cutting of the optical paths by the object of at least two parallel light beams. The use of two parallel light beams to measure the cutoff speed of the optical paths allows the user to choose any object to use the control device, such as a wand or the fingers of the hand for example.

In embodiments, the estimation of the longitudinal position of the crossing and the measurement of the speed of the object are based on a signal coming from at least one optical sensor representing the cutting of the optical paths by the object of at least three light beams defining a volume.

These embodiments have the advantage of having greater accuracy in calculating the longitudinal position of the crossing and the speed of the object.

In embodiments, the device which is the subject of the present invention comprises means for converting each parameter value into a value represented according to the MIDI protocol (acronym for "Musical Instrument Digital Interface" in English). The advantage of these embodiments is to be able to use the device object of the present invention as a musical instrument.

According to a second aspect, the present invention relates to a method of operating a device which is the subject of the present invention, which comprises the following steps: - generation of at least two optical paths traversed by non-parallel light beams between at least one sensor optical and at least one emitter of at least one light beam, - measurement of the speed of an object passing through at least two light beams as a function of a signal coming from at least one optical sensor representing the cutting of the optical paths by the object, - estimation of the longitudinal position of the crossing of the object as a function of a signal coming from at least one optical sensor representing the cutting of the optical paths by the object of at least two non-parallel light beams and - control of a parameter value of an audiovisual effect as a function of the estimated longitudinal position.

The advantages, aims and particular characteristics of the method which is the subject of the present invention being similar to those of the device which is the subject of the present invention, they are not repeated here.

According to a third aspect, the present invention relates to an audiovisual system which comprises: - at least one device which is the subject of the present invention, - means for transforming each parameter value of an audiovisual effect into an effect control signal sound and / or visual and - a transducer converting the control signal into a sound and / or visual effect. The advantage of these embodiments is to have a system making it possible to produce a sound and / or visual effect as a function of the movements made by the user with regard to the light beams.

In embodiments, the transducer includes an electroacoustic transducer such that the sound signal emitted by the transducer depends on the movements of a user with respect to the light beams.

Connecting an object device of the present invention to an electroacoustic transducer has the advantage of using the system as a musical instrument.

Brief description of the figures Other advantages, aims and particular characteristics of the invention will emerge from the following non-limiting description of at least one particular embodiment of a control device and of an implementation method of such a device, with reference to the appended drawings, in which: - Figure 1 shows, schematically, a first particular embodiment of a device which is the subject of the present invention, - Figure 2 shows, schematically, a second mode particular embodiment of a device object of the present invention, - Figure 3 shows, schematically, a third particular embodiment of a device object of the present invention, - Figure 4 shows, in the form of a flowchart, a fourth particular embodiment of a device object of the present invention and - Figure 5 shows, schematically, a fifth mode of re particular layout of a device which is the subject of the present invention.

Description of exemplary embodiments of the invention

We note now that the figures are not to scale.

This description is given without limitation, each characteristic of an embodiment can be combined with any other characteristic of any other embodiment in an advantageous manner.

Note that the term “one” is used in the sense of “at least one”.

FIG. 1 shows a particular embodiment 10 of a control device which is the subject of the present invention.

The device 10 comprises a structural element 100 on which are fixed the means for generating two optical paths and in particular the emitters, 105a and 105b, of at least one light beam, 110a or 110b, and the optical sensor 115. The element structural may be a metallic structure comprising the transmitters, 105a and 105b, and the optical sensor 115. The structural element may comprise two independent supports fixed by pinching on a surface, such as a table, for example. One of the supports can comprise at least one transmitter, 105a or 105b, the other support comprising at least one optical sensor 115.

An emitter, 105a or 105b, of at least one light beam, 110a or 110b, can comprise: - a laser, - an emitter of at least two laser beams, - an emitter of at least two beams of lengths distinct waves, - an emitter of at least two beams whose activation is alternated and / or - any other emitter of focused light.

A transmitter, 105a or 105b, can emit several light beams, 110a or 110b. Each transmitter, 105a or 105b, can be of a different type. Preferably, the device 10, object of the present invention, comprises two transmitters, 105a and 105b. The transmitter 105a emitting a light beam 110a, the transmitter 105b emitting a light beam 110b.

An optical sensor 115 can include: - a photoconductive cell, - a photodiode, - a phototransistor, - a CCD sensor (acronym for “Couple Charge Device” in English), - a CMOS sensor (acronym for “Complementary Metal Oxide Semiconductor>) > in English) and / or - any other optical sensor.

An optical sensor 115 may include a wavelength discrimination filter. An optical sensor 115 may include means for diffraction of at least one captured light beam. An optical sensor 115 can pick up several light beams, 110a and 110b. Each optical sensor 115 can be of different type.

Preferably, the device 10, object of the present invention, comprises an optical sensor capturing the two light beams 110a and 110b respectively from the two transmitters 105a and 105b. In embodiments, the light beams 110a and 110b are discriminated by diffraction.

Preferably, each light beam 110a, 110b is a single wavelength beam. The light beams 110a and 110b have the same wavelength and are activated alternately. The discrimination of the light beams 110a and 110b is carried out by means of alternative activation.

At least two light beams 110a, 110b are non-parallel.

In embodiments, the means for generating two optical paths traversed by non-parallel light beams 110a and 110b comprising at least one optical sensor 115 and at least one transmitter, 105a or 105b, comprise at least one mirror. The mirror can be semi-reflective. For example, a light beam, 110a or 110b, coming from a transmitter, 105a or 105b, is partially diffracted and partially reflected by the mirror. The diffracted part of the light beam, 110a or 110b, travels along an optical path. The reflected part of the light beam, 110a or 110b, travels along another optical path.

The optical sensor 115 generates at least one electrical signal 120 representative of the cut of at least one light beam, 110a or 110b, captured. Each electrical signal 120 is transmitted to: - means 145 for measuring the speed 150 of an object passing through at least two light beams, 110a and 110b, as a function of a signal 120 exiting from at least one optical sensor 115 representing the cut of the optical paths by an object, - means 125 for estimating the longitudinal position 130 of the crossing of the object as a function of a signal 120 coming from at least one optical sensor 115 representing the cut of the optical paths by the object of at least two light beams, 110a and 110b, not parallel and - detection means 165 of the direction of cut 170 of the optical paths by the object as a function of at least one signal 120 coming out of at least one optical sensor 115 representing the cutting of the optical paths by the object of at least two light beams, 110a and 110b.

At least one dimension d of the object is predetermined and previously recorded by the means 145 for measuring the speed of the object. Preferably, the object is a cylinder trunk with a circular directing curve situated in a plane perpendicular to the generator, such as a rod for example. The predetermined dimension is the diameter of the cylinder trunk. Recall that a cylinder is a surface in space defined by a straight line, called a generatrix, passing through a variable point describing a closed planar curve, called a directing curve, and keeping a fixed direction.

The means 145 for measuring the speed of the object determine, for at least one beam, 110a or 110b, the duration known as “cut-off time” during which the beam, 110a or 110b, has not been picked up by the optical sensor 115. The determination of the cut-off time is carried out by means of the electrical signal 120.

The speed of the object is obtained by dividing the predetermined dimension d by the cut-off time.

In embodiments, the cut-off time for each beam, 110a and 110b, is determined. The speed is determined relative to an average of the cut-off times.

The measured speed 150 is then transmitted: - to control means 155 known as “speed control means” with a parameter value 160 of an audiovisual effect as a function of the measured speed 150 and - to the estimation means 125 .

The longitudinal position 130 of the crossing of the object of at least two light beams, 110a and 110b, is determined by calculating the duration known as "crossing duration". The crossing time is the time between a characteristic instant of the electrical signal 120 when a first beam, 110a or 110b, is not picked up by an optical sensor 115 and a corresponding characteristic instant of the electrical signal 120 when a second beam, 110a or 110b, is not picked up by an optical sensor 115. For example, the characteristic instant may be the instant of the start of the cut of the light beam, 110a or 110b, or the instant of end of the cut of the light beam, 110a or 110b. The start time of the cut and the end time of the cut each corresponding to a change of state of the electrical signal 120.

The longitudinal position 130 is determined by multiplying the crossing duration by the predetermined dimension d divided by the breaking duration. The longitudinal position 130 can be determined by multiplying the measured speed 150 by the crossing time.

The longitudinal position 130 is transmitted to control means 135 called "positional control means" with a parameter value 140 of an audiovisual effect as a function of the estimated longitudinal position 130.

The detection means 165 detect the cutting direction 170 as a function of a characteristic instant of the electrical signal 120 when a first light beam, 110a or 110b, is not picked up by an optical sensor 115 and of a corresponding characteristic instant of the electrical signal 120 when a second light beam, 110a or 110b, is not picked up by an optical sensor 115. The cutting direction 170 is in the direction of the first beam, 110a or 110b, which is not picked up by an optical sensor 115 towards the second beam, 110a or 110b, which is not picked up by an optical sensor 115.

The cutoff direction 170 is transmitted to control means 175 called "directional control means" with a parameter value 180 of an audiovisual effect as a function of the detected direction 170.

Conversion means 185 convert each parameter value 140, 160 and 180 into a value represented according to the MIDI protocol (acronym for “Musical Instrument Digital Interface” in English) 190. In embodiments, the conversion means 185 are optional.

The measurement means 145, the estimation means 125, the determination means 165, the positional control means 135, the speed control means 155, the directional control means 175 and the conversion means 185 may each be a microprocessor associated with a program memory comprising instructions for carrying out the steps of the method which is the subject of the present invention. Preferably, a microprocessor associated with a program memory comprising instructions for carrying out the steps of the method which is the subject of the present invention provides the functions of the means 125, 135, 145, 155, 165, 175 and 185.

FIG. 2 shows a particular embodiment 20 of a device which is the subject of the present invention.

The device 20 comprises a structural element 200 on which are fixed the means for generating three optical paths and in particular the emitters, 205a and 205b, of at least one light beam, 210a, 210b or 210c, and the optical sensors, 215a and 215b. The structural element can be a metallic structure comprising the emitters, 205a and 205b, and the optical sensors, 215a and 215b. The structural element may include two independent supports fixed by pinching on a surface, such as a table, for example. One of the supports can comprise at least one transmitter, 205a or 205b, the other support comprising at least one optical sensor, 215a or 215b.

An emitter, 205a or 205b, of at least one light beam, 210a, 210b or 210c may comprise: - a laser, - an emitter of at least two laser beams, - an emitter of at least two beams of length d 'distinct wave, - an emitter of at least two beams whose activation is alternated and / or - any other emitter of focused light.

A transmitter, 205a or 205b, can emit several light beams, 210a, 210b or 210c. Each transmitter, 205a or 205b, can be of a different type.

Preferably, the transmitter 205a emits a light beam 210a. The transmitter 205b emits two light beams, 210b and 210c. The light beam 210b is not parallel to the beam 210a, and the light beam 210c is parallel to the beam 210a.

An optical sensor, 215a or 215b, can include: - a photoconductive cell, - a photodiode, - a phototransistor, - a CCD sensor (acronym for "Couple Charge Device" in English), - a CMOS sensor (acronym for "Complementary Metal Oxide Semiconductor >> and / or - any other optical sensor.

In embodiments, an optical sensor, 215a or 215b, may include a wavelength discrimination filter. An optical sensor, 215a or 215b may comprise means for diffraction of at least one light beam, 210a, 210b or 210c, captured. A discrimination of at least two light beams, 210a, 210b or 210c, can be made by diffraction. An optical sensor, 215a or 215b, can pick up several light beams, 210a, 210b or 210c. Each optical sensor, 215a or 215b, can be of different type.

Preferably, the device 20 which is the subject of the present invention comprises two optical sensors 215a and 215b. The optical sensor 215a picks up the light beams 210a and 210b. The optical sensor 215a comprises means for discriminating the light beams 210a and 210b. The optical sensor 215b captures the light beam 210c.

Preferably, each light beam 210a, 210b, 210c is a beam with a single wavelength.

In embodiments, the means for generating three optical paths comprise at least one mirror. The mirror can be semi-reflective. For example, a light beam, 210a, 210b or 210c, coming from a transmitter, 205a or 205b is partially diffracted and partially reflected by the mirror. The diffracted part of the light beam, 210a, 210b or 210c, travels through an optical path. The reflected part of the light beam, 210a, 210b or 210c, travels along another optical path.

The optical sensor 215a generates an electrical signal 220a representative of the cut-off of at least one light beam, 210a or 210b, captured. The electrical signal 220a is transmitted to: - means 245 for measuring the speed 250 of an object passing through at least two light beams, 210a, 210b or 210c, depending on at least one signal, 220a or 220b, coming out of '' at least one optical sensor, 215a or 215b, representing the cutting of the optical paths by an object, - means 225 for estimating the longitudinal position 230 of the crossing of the object as a function of at least one signal, 220a or 220b, emerging from at least one optical sensor, 215a or 215b, representing the cutting of the optical paths by the object of at least two light beams, 210a, 210b or 210c, and - direction detection means 265 of the optical paths 270 being cut by the object as a function of at least one signal 220a, 220b leaving at least one optical sensor representing the cutting of the optical paths by the object of at least three light beams 210a, 210b and 210c.

The optical sensor 215b generates an electrical signal 220b representative of the cut-off of at least one captured light beam 210c. The electrical signal 220b is transmitted to the measurement means 245, to the estimation means 225 and to the detection means 265.

The light beams, 210a and 210c, are parallel, the speed 250 of the object passing through the light beams 210a and 210c is measured by means of the electrical signals 220a and 220b.

Speed 250 is measured by calculating the crossing time. The crossing time is the time between: - a characteristic instant of the electrical signal 220a when the light beam 210a is not picked up by an optical sensor 215a and a corresponding characteristic instant of the electrical signal 220b when the second light beam 210c is not not picked up by the optical sensor 215b or, - a characteristic instant of the electrical signal 220b when the light beam 210c is not picked up by an optical sensor 215b and a corresponding characteristic instant of the electrical signal 220a when the second light beam 210a is not not picked up by the optical sensor 215a.

The distance between the beams 210c and 210a is predetermined and previously recorded by the measuring means 245. The speed 250 is measured by dividing the distance between the beams 210c and 210a by the crossing time by the distance between the beams 21 Oc and 21 Oa.

In embodiments, the measurement means 245 measure the speed as described with reference to FIG. 1, as a function of the beams 210a and 210b and / or as a function of the beams 210b and 210c. The measured speed 250 can be an average of different speeds calculated from several pairs of light beams 210a, 210b, 210c.

The measured speed 250 is transmitted to control means 255 known as “speed control means” with a parameter value 260 of an audiovisual effect as a function of the speed 250 measured and to the estimation means 225.

The longitudinal position 230 is estimated according to one of the embodiments detailed with reference to FIG. 1, as a function of the signals 220a and 220b representing the cutting of the light beams 21 Oa, 21 Ob and 21 Oc by an object.

The longitudinal position 230 is transmitted to control means 235 called "positional control means" with a parameter value 240 of an audiovisual effect as a function of the estimated longitudinal position 230.

The detection means 265 detect the cut direction 270. Preferably, two components of the cut direction 270 are detected, an axial direction component and a longitudinal direction component. The axial direction component is a component perpendicular to the parallel beams 210a and 210c. The longitudinal direction component is a component parallel to the parallel beams 210a and 210c.

The axial direction component is detected based on signals 220a and 220b. The axial direction component is the direction of the first cut of a light beam, 210a, 210b or 210c, towards the cut of a second light beam, 210a, 210b or 210c. The axial direction component can be from beam 210a to beam 210c or from beam 210c to beam 210a. Each cut of each light beam, 210a, 210b or 210c is determined by analysis of the electrical signals 220a and 220b. The detection of the cut-off order of the light beams is determined by a temporal comparison of the electrical signals 220a and 220b.

The longitudinal direction component is detected as a function of the electrical signals 220a and 220b. The longitudinal direction component is determined by analysis of the electrical signals 220a and 220b. The longitudinal direction component can be in the direction of the optical path followed by one of the parallel light beams, 210a or 210c, or in the opposite direction. Preferably, the longitudinal direction component is measured, as a function of the determined axial direction component and by comparison of the of an estimated longitudinal position between the light beams 210a and 210b and of an estimated longitudinal position between the light beams 210b and 210c calculated by means of estimation 225.

The components of the cut-off direction 270 are transmitted to control means 275 known as “directional control means” with a parameter value 280 of an audiovisual effect as a function of the detected direction 270.

Preferably, each component of the cutoff direction 270 controls a parameter value of an audiovisual effect.

Conversion means 285 convert each parameter value 240, 260 and 280 into a value represented according to the MIDI protocol (acronym for “Musical Instrument Digital Interface” in English) 290. In embodiments, the conversion means 285 are optional.

The measurement means 245, the estimation means 225, the determination means 265, the positional control means 235, the speed control means 255, the directional control means 275 and the conversion means 285 may each be a microprocessor associated with a program memory comprising instructions for carrying out the steps of the method which is the subject of the present invention. Preferably, a microprocessor associated with a program memory comprising instructions for carrying out the steps of the method which is the subject of the present invention ensures the functions of the means 225, 235, 245, 255, 265, 275 and 285.

FIG. 3 shows a particular embodiment 30 of a device which is the subject of the present invention.

The device 30 comprises a structural element 300 on which are fixed the means for generating three optical paths and in particular the emitters, 305a, 305b and 305c, of at least one light beam, 310a, 310b or 310c, and the optical sensors, 315a, 315b and 315c. The structural element can be a metallic structure comprising the emitters, 305a, 305b and 305c, and the optical sensors, 315a, 315b and 315c. The structural element may include two independent supports fixed by pinching on a surface, such as a table, for example. One of the supports can comprise at least one transmitter, 305a, 305b or 305c, the other support comprising at least one optical sensor, 315a, 315b or 315c.

An emitter, 305a, 305b or 305c, of at least one light beam, 310a, 310b or 310c may include: - a laser, - an emitter of at least two laser beams, - an emitter of at least two beams of distinct wavelengths, - an emitter of at least two beams whose activation is alternated and / or - any other emitter of focused light.

A transmitter, 305a, 305b or 305c can emit several light beams, 310a, 310b or 310c. Each transmitter, 305a, 305b or 305c can be of different type. Preferably, the transmitter 305a emits a light beam 310a. The transmitter 305b emits a light beam 310b and the transmitter 305c emits a light beam 310c. The light beams 310a, 310b and 310b form a volume.

An optical sensor, 315a, 315b or 315c, can include: - a photoconductive cell, - a photodiode, - a phototransistor, - a CCD sensor (acronym for “Couple Charge Device” in English), - a CMOS sensor (acronym for “ Complementary Metal Oxide Semiconductor (in English) and / or - any other optical sensor.

In embodiments, an optical sensor, 315a, 315b or 315c may include a wavelength discrimination filter. An optical sensor, 315a, 315b or 315c can comprise means for diffraction of at least one light beam, 310a, 310b or 310c, captured. A discrimination of the light beams, 310a, 310b or 310c, can be made by diffraction. An optical sensor, 315a, 315b or 315c, can pick up several light beams, 310a, 310b or 310c. Each optical sensor, 315a, 315b or 315c, can be of different types.

Preferably, the device 30 which is the subject of the present invention comprises three optical sensors, 315a, 315b and 315b. The optical sensor 315a receives the light beam 310a. The optical sensor 315b receives the light beam 310b. The optical sensor 315c receives the light beam 310c.

Preferably, each light beam 310a, 310b, 310c is a beam with a single wavelength.

The light beams 310a, 310b and 310c form a volume. At least two light beams 310a, 310b, 310c are non-parallel.

In embodiments, the means for generating three optical paths comprise at least one mirror. The mirror can be semi-reflective. For example, a light beam, 310a, 310b or 310c, from a transmitter, 305a, 305b or 305c, is partially diffracted and partially reflected by the mirror. The diffracted part of the light beam, 310a, 310b or 310c, travels through an optical path. The reflected part of the light beam, 310a, 310b or 310c, travels along another optical path.

The optical sensor 315a generates an electrical signal 320a representative of the cut-off of at least one captured light beam 310a. The electrical signal 320a is transmitted to: - means 345 for measuring the speed 350 of an object passing through at least two light beams 310a, 310b, 310c as a function of at least one signal 320a, 320b, 320c leaving at least at least one optical sensor 315a, 315b, 315c representing the cutting of the optical paths by an object, - means for estimating 325 of the longitudinal position 330 of the crossing of the object as a function of at least one signal 320a, 320b, 320c emerging from at least one optical sensor 315a, 315b, 315c representing the cutting of the optical paths by the object of at least two light beams 310a, 310b, 310c and - detection means 365 of the cutting direction 370 of the optical paths through the object as a function of at least one signal 320a, 320b, 320c leaving at least one optical sensor representing the cutting of the optical paths through the object of at least three light beams 310a, 310b and 310c.

The optical sensor 315b generates an electrical signal 320b representative of the cut-off of at least one captured light beam 310b. The electrical signal 320b is transmitted to the measurement means 345, to the estimation means 325 and to the detection means 365.

The optical sensor 315c generates an electrical signal 320c representative of the cut-off of at least one captured light beam 310c. The electrical signal 320c is transmitted to the measurement means 345, to the estimation means 325 and to the detection means 365.

The speed 350 of the object passing through the light beams 310a, 310b and 310c is measured by means of at least two electrical signals, 320a, 320b or 320c. The speed 350 is measured according to one of the embodiments defined with reference to FIGS. 1 and 2.

The measured speed 350 can be an average of different speeds calculated from several pairs of light beams, 310a, 310b or 310c.

The measured speed 350 is then transmitted to control means 355 called "speed control means" of a parameter value 360 of an audiovisual effect as a function of the speed 350 measured and to the estimation means 325.

The longitudinal position 330 is estimated according to one of the embodiments detailed with reference to FIG. 1. The longitudinal position 330 can be an average of longitudinal positions 330 calculated for at least two light beams, 310a, 310b or 310c.

The longitudinal position 330 is transmitted to control means 335 called "positional control means" with a parameter value 340 of an audiovisual effect as a function of the estimated longitudinal position 330.

The detection means 365 detect the cut direction 370. Preferably, three components of the cut direction 370 are detected, a direction component ab, a direction component bc and a direction component ac. The direction component ab is a component determined with respect to the plane formed by the light beams 310a and 310b. The direction component bc is a component determined with respect to the plane formed by the light beams 310b and 310c. The direction component ac is a component determined with respect to the plane formed by the light beams 310a and 310c.

Preferably, each direction component is determined as a function of an estimated longitudinal position between the light beams 310a and 310b, of an estimated longitudinal position between the light beams 310b and 310c and of an estimated longitudinal position between the light beams 310a and 310c respectively.

The components of the cut-off direction 370 are transmitted to control means 375 called "directional control means" with a parameter value 380 of an audiovisual effect as a function of the detected direction 370.

Preferably, each component of the cutoff direction 370 controls a parameter value of at least one audiovisual effect.

Conversion means 385 convert each parameter value 340, 360 and 380 into a value represented according to the MIDI protocol (acronym for "Musical Instrument Digital Interface" in English) 390.

The measurement means 345, the estimation means 325, the determination means 365, the positional control means 335, the speed control means 355, the directional control means 375 and the conversion means 385 can each be one microprocessor associated with a program memory comprising instructions for carrying out the steps of the method which is the subject of the present invention. Preferably, a microprocessor associated with a program memory comprising instructions for carrying out the steps of the method which is the subject of the present invention performs the functions of the means 325, 335, 345, 355, 365, 375 and 385.

FIG. 4 shows a particular embodiment 40 of a method which is the subject of the present invention.

The method 40 comprises the following steps: generation 41 of at least two optical paths traversed by light beams, 110a, 110b, 210a, 210b, 210c, 310a, 310b or 310c, not parallel between at least one optical sensor, 115 , 215a, 215b, 315a, 315b or 315c, and at least one transmitter 105a, 105b, 205a, 205b, 305a, 305b or 305c, of at least one light beam, 110a, 110b, 210a, 210b, 210c, 310a, 310b or 310c, - measure 42 of the speed, 150, 250 or 350, of an object passing through at least two light beams, 110a, 110b, 210a, 210b, 210c, 310a, 310b or 310c, depending on a signal , 120, 220a, 220b, 320a, 320b or 320c, emerging from at least one optical sensor, 115, 215a, 215b, 315a, 315b or 315c, representing the cutting of the optical paths by the object, - estimate 43 of the longitudinal position, 130, 230 or 330, of the crossing of the object as a function of an outgoing signal, 120, 220a, 220b, 320a, 320b or 320c, of at least one optical sensor, 115, 215a, 215b , 315a, 315b or 315c, representing the cutting of the optical paths by the object of at least two light beams, 110a, 110b, 210a, 210b, 210c, 310a, 310b or 310c, not parallel and - control 44 of a parameter value, 140, 240 or 340, of an audiovisual effect according to the estimated longitudinal position, 130, 230 or 330.

The generation 41, measurement 42, estimation 43, control 44 steps are preferably carried out by means of an embodiment of a device, 10, 20, 30 or one of the embodiments detailed above.

In embodiments, the method 40 comprises at least one of the following steps: control of a parameter value, 160, 260 or 360, of an audiovisual effect as a function of the measured speed, 150, 250 or 350, - detection of the direction of cut, 170, 270 or 370, of the optical paths by the object as a function of at least one signal, 120, 220a, 220b, 320a, 320b or 320c, emerging from at least one optical sensor , 115, 215a, 215b, 315a, 315b or 315c, representing the cutting of the optical paths by the object of at least two light beams, 110b, 210a, 210b, 210c, 310a, 310b or 310c, - control of a parameter value, 180, 280 or 380, of an audiovisual effect depending on the direction, 170, 270 or 370, detected, - conversion of at least one parameter value, 140, 240, 340, 160, 260, 360, 180, 280 or 380, in value represented according to the MIDI protocol, 190, 290 or 390.

FIG. 5 shows a particular embodiment of an audiovisual system 50 which is the subject of the present invention.

An embodiment, 10, 20 or 30, of a device which is the subject of the present invention transmits each parameter value, 140, 160 and 180, or 240, 260 and 280, or 340, 360 and 380, in value represented according to the MIDI protocol, 190, 290 or 390, to means 500 for transforming each parameter value of an audiovisual effect, represented according to the MIDI protocol, 190, 290 or 390, into a control signal 505 of a sound effect and / or visual.

In embodiments, the parameter values of an audiovisual effect, 140, 160 and 180, or 240, 260 and 280, or 340, 360 and 380, are transmitted directly to the transformation means 500. The transformation means 500, transforming the parameter values of an audiovisual effect, 140, 160 and 180, or 240, 260 and 280, or 340, 360 and 380 into a control signal 505 of a sound and / or visual effect.

The control signal 505 is transmitted to the input of a transducer 510 converting the control signal 505 into a sound and / or visual effect. Preferably, the transducer 510 comprises an electroacoustic transducer such that the sound signal emitted by the transducer depends on the movements of a user opposite the light beams of an embodiment 10 of a device which is the subject of the present invention.

In embodiments, the device of the audiovisual system 50 is one of the embodiments described above.

Claims (12)

1. Control device (10, 20, 30), characterized in that it comprises: - means for generating at least two optical paths traversed by light beams (110a, 110b, 210a, 210b, 210c, 310a , 310b, 310c) non-parallel comprising at least one optical sensor (115, 215a, 215b, 315a, 315b, 315c) and at least one transmitter (105a, 105b, 205a, 205b, 305a, 305b, 305c) of · at least one light beam, - means for measuring (145, 245, 345) the speed (150, 250, 350) of an object passing through at least two light beams as a function of a signal (120, 220a, 220b, 320a, 320b, 320c) emerging from at least one optical sensor representing the cutting of the optical paths by the object, - means for estimating (125, 225, 325) the longitudinal position (130, 230, 330) of the crossing of the object as a function of a duration known as "crossing duration" between two instants characteristic of a signal leaving at least one optical sensor representing the cutting of the optical paths by the object of at least two non-parallel light beams and - control means (135, 235, 335) called "positional control means" with a parameter value (140, 240, 340) an audiovisual effect as a function of the estimated longitudinal position.
2. Control device (10, 20, 30) according to claim 1, which comprises control means (155, 255, 355) called "speed control means" by a parameter value (160, 260, 360 ) an audiovisual effect as a function of the measured speed (150, 250, 350).
3. Control device (10, 20, 30) according to one of claims 2, which comprises: -detection means (165, 265, 365) of the cutting direction (170, 270, 370) of at least two optical paths through the object as a function of at least one signal (120, 220a, 220b, 320a, 320b, 320c) leaving at least one optical sensor (115, 215a, 215b, 315a, 315b, 315c) representing the Cutting of the optical paths by the object of at least two light beams (110a, 110b, 210a, 210b, 210c, 310a, 310b, 310c) and - control means (175, 275, 375) called "control means directional ”of a parameter value (180, 280, 380) of an audiovisual effect according to the detected direction.
4. sek> n4arevendication 3 control device (20, 30), in which: - the direction of cut (270, 370) of the optical paths by the object is detected as a function of at least one signal (220a, 220b, 320a, 320b, 320c) emerging from at least one optical sensor (215a, 215b, 315a, 315b, 315c) representing the cutting of the optical paths by the object of at least three light beams (210a, 210b, 210c, 310a , 310b, 310c) and - the directional control means (275, 375) control at least one parameter value (280, 380) of at least one audiovisual effect as a function of two components of a vector representative of the detected direction .
5. Control device (30) according to one of claims 3 or 4, in which: - the direction of cut (370) of the optical paths by the object is detected as a function of at least one signal (320a, 320b , 320c) emerging from at least one optical sensor (315a, 315b, 315c) representing the cutting of the optical paths by the object of at least three light beams (310a, 310b, 310c) defining a volume and - the means of directional controls (375) control at least one parameter value (380) of at least one audiovisual effect as a function of three components of a vector representative of the detected direction.
6. Control device (10, 20, 30) according to one of claims 1 to 5, in which the speed (150, 250, 350) is measured as a function of at least one duration, known as “cut-off duration” , of a signal (120, 220a, 220b, 320a, 320b, 320c) coming from at least one optical sensor (115, 215a, 215b, 315a, 315b, 315c), the cutoff duration representing the cutoff of the optical paths by the object of at least one light beam (110a, 110b, 210a, 210b, 210c, 310a, 310b, 310c) and of a predetermined dimension of the object.
7. Control device (20) according to one of claims 1 to 6, wherein the measurement of the speed (250) of the object is a function of a signal (220a, 220b) coming from at least an optical sensor (215a, 215b) representing the cutting of the optical paths by the object of at least two parallel light beams (210a, 210c).
8. Control device (30) according to one of claims 1 to 7, in which the estimation of the longitudinal position (330) of the crossing and the measurement of the speed (350) of the object are a function of '' a signal (320a, 320b, 320c) coming from at least one optical sensor (315a, 315b, 315c) representing the cutting of the optical paths by the object of at least three light beams (310a, 310b, 310c) defining a volume.
9. Control device (10, 20, 30) according to one of claims 1 to 8, which comprises means for converting (185, 285, 385) of each parameter value (140, 160, 180, 240, 260 , 280, 340, 360, 380) in value represented according to the MIDI protocol (190, 290, 390) (acronym for "Musical Instrument Digital Interface" in English).
10. Method (40) for operating a device (10, 20, 30) according to one of claims 1 to 9, characterized in that it comprises the following steps: - generation (41) of at least two optical paths traveled by light beams (110a, 110b, 210a, 210b, 210c, 310a, 310b, 310c) non-parallel between at least one optical sensor (115, 215a, 215b, 315a, 315b, 315c) and at least one transmitter (105a, 105b, 205a, 205b, 305a, 305b, 305c) of at least one light beam, - measurement (42) of the speed (150, 250, 350) of an object passing through at least two light beams in function a signal (120, 220a, 220b, 320a, 320b, 320c) coming from at least one optical sensor representing the cutting of the optical paths by the object, - estimation (43) of the position (130, 230, 330 ) longitudinal of the crossing of the object as a function of a duration known as "crossing duration" between two instants characteristic of a signal coming from at least one op sensor tick representing the cutting of the optical paths by the object of at least two non-parallel light beams and - control (44) of a parameter value (140, 240, 240) of an audiovisual effect depending on the estimated longitudinal position .
11. Audiovisual system (50), which comprises: - at least one device (10, 20, 30) according to one of claims 1 to 9, - transformation means (500) of each parameter value (140, 160 , 180, 190, 240, 260, 280, 290, 340, 360, 380, 390) of an audiovisual effect into a control signal (505) of a sound and / or visual effect and - a transducer (510) converting the control signal into a sound and / or visual effect.
12. Audiovisual system (50) according to claim 11, in which the transducer (510) comprises an electroacoustic transducer in such a way that the sound signal emitted by the transducer depends on the movements of a user opposite the light beams.
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FR2590033A1 (en) * 1985-11-13 1987-05-15 Guerre Philippe Device for the three-dimensional detection of an object by laser light, particularly for a show
DE4226661A1 (en) * 1992-06-23 1994-01-05 Friedrich Foerster Optical information input esp. for electronic music prodn. - involves control of instrument by photoreceiver of signal from reflector movable within sweep of deflected laser beam
US6489550B1 (en) * 1997-12-11 2002-12-03 Roland Corporation Musical apparatus detecting maximum values and/or peak values of reflected light beams to control musical functions
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