DE102020101997A1 - Gesture recognition device for the interior lighting of vehicles with at the same time little dead space in front of the sensor system - Google Patents

Abstract

The invention relates to an optical sensor system for a gesture recognition system in which the optical transmitters (H1, to H4) and the receiver (D) are covered with diffusers (DD). The optical sensor system also serves as the interior lighting of a vehicle. The invention can therefore also be seen as a lighting device that simultaneously serves as a sensor system. By mixing different colored optical transmitters with transmitters that emit non-visible light, colors and brightnesses can be displayed in different color systems without changing the sensor performance.

Description

Generic term

The invention is directed to an optical sensor system for a gesture recognition system. It is preferably a gesture recognition device, which can also be used for the interior lighting of vehicles, with a small dead space in front of the sensor system

State of the art

The optical sensor system preferably comprises a plurality of optical transmitters ( H1 , H2 ). In particular, it is at least a first transmitter ( H1 ) and a second transmitter ( H2 ). Furthermore, the optical sensor system preferably has at least one receiver ( D. ) and a controller ( CTR ), as well as at least one compensation transmitter ( K ) on.

The first optical transmitter ( H1 ) preferably has a first radiation lobe without additional devices ( SK1 ) in a free space ( FR ) in front of the sensor system. This first radiation lobe ( SK1 ) typically has a first transmission aperture angle ( α1 ). The first sender ( H1 ) radiates into this first subspace of the free space ( FR ) in front of the sensor system, which is transmitted through the first transmission lobe ( SK1 ) is determined. In this subspace of the first transmission lobe ( SK1 ) the first station broadcasts ( H1 ) upon issue.

The second optical transmitter ( H2 ) preferably has a second radiation lobe without additional devices ( SK2 ) in a free space ( FR ) in front of the sensor system. This second radiation lobe ( SK2 ) typically has a second transmission opening angle ( α2 ). The second transmitter ( H2 ) radiates into this second subspace of the free space ( FR ) in front of the sensor system, which is transmitted through the second transmission lobe ( SK2 ) is determined. In this second subspace of the second transmission lobe ( SK2 ) the second transmitter broadcasts ( H2 ) upon issue.

In analogy to this, the receiver ( D. ) without additional device a sensitivity lobe ( EK ), which in the free space ( FR ) reaches in front of the sensor system. The receiving lobe ( EK ) has a receiving aperture angle ( β ) on. Are in the subspace of the free space ( FR ) placed radially radiating objects in front of the sensor system, which is characterized by this reception lobe, then these radiate into the receiver ( D. ) on. Thus, within the subspace of the receiving lobe ( EK ) placed radiating objects the receiver output signal ( S0 ) Recipient ( D. ) influence.

If a reflective object enters the area of intersection between the first transmission lobe ( SK1 ) of the first station ( H1 ) and the receiving lobe ( EK ) Recipient ( D. ) placed, the first transmitter ( H1 ) irradiate this object and the object then receives the reflected light signal from the first transmitter ( H1 ) into the recipient ( D. ) radiate. This results in a first transmission link from the first transmitter ( H1 ) via the reflective object to the receiver ( D. ).

If a reflective object enters the area of intersection between the second transmission lobe ( SK2 ) of the second transmitter ( H2 ) and the receiving lobe ( EK ) Recipient ( D. ) is placed, the second transmitter (H12) can irradiate this object and the object can then irradiate the light signal from the second transmitter ( H2 ) into the recipient ( D. ) radiate. This results in a second transmission link from the second transmitter ( H2 ) via the reflective object to the receiver ( D. ).

A compensation transmitter ( K ) also radiates into the receiver ( D. ) via a third transmission link (13) and influences the receiver output signal ( S0 ).

The third transmission path (13) of the radiation from the compensation transmitter ( K ) into the recipient ( D. ) is preferred by the sensitivity lobe ( EK ) independent.

The emission of the compensation transmitter ( K ) is preferred by a compensation transmit signal ( S3 ) controlled.

The radiation from the space of the sensitivity lobe ( EK ) Recipient ( D. ) into the recipient ( D. ) and the radiation from the compensation transmitter ( K ) into the recipient ( D. ) are preferably superimposed summing up in the receiver ( D. ).

The light emission of the first optical transmitter ( H1 ) is preferred with a first transmission signal ( S5_1 ) modulated.

The light emission of the second optical transmitter ( H2 ) is preferred with a second transmission signal ( S5_2 ) modulated.

A controller ( CTR ) now generates depending on the receiver output signal ( S0 ) and depending on the first transmission signal ( S5_1 ) and depending on the second transmission signal ( S5_2 ) the compensation transmission signal ( S3 ). The regulator ( CTR ) regulates the compensation transmission signal ( S3 ) in such a way that the receiver output signal ( S0 ) as a result of the accumulating superimpositions, i.e., apart from system noise and control errors, essentially no signal components of the first transmission signal ( S5_1 ) and the second transmission signal ( S5_2 ) has more.

The regulator ( CTR ) then typically outputs one or two control value signals as measured value signals, the values of which correspond to a position vector of a reflecting individual object in free space ( FR ) symbolize in front of the sensor system.

In the state of the art, in the immediate area in front of the receiver ( D. ) a non-sensitive area of non-reception ( NDA ), in which the reception lobe ( EK ) does not interfere with one of the other transmission lobes ( SK1 , SK2 ) cuts. Accordingly, although an emitting object can enter light into the receiver ( D. ), but a reflecting object is not there by the first transmitter ( H1 ) or the second transmitter ( H2 ) and therefore no light can be reflected into the receiver ( D. ) radiate. Accordingly, there is a dead space in which gesture recognition is not possible. This is in 1 shown.

task

The proposal is therefore based on the task of creating a solution that has no or a reduced dead space ( NDA ) having.

This object is achieved by a device according to claim 1.

Solution of the task

In the case of a sensor system of the type described at the outset, the problem is solved according to the proposal in that the shape of the receiving and transmitting lobes is suitably modified.

The system proposed here is now characterized by the fact that a first optical diffuser ( DH1 ) between the first transmitter ( H1 ) and the free space ( FR ) and that a second optical diffuser ( DH2 ) between the second transmitter ( H2 ) and the free space ( FR ) and that an additional optical diffuser ( DD ) between the recipient ( D. ) and the free space ( FR ) is arranged. These optical diffusers expand the respective lobes. This results in the situation of 2 . The dead space ( NDA ) is massively reduced. Gesture recognition is now also possible in the free space areas that have now been removed from the dead space.

The first optical transmitter ( H1 ) then also emits the first radiation lobe with the additional device ( SK1 ) in the free space ( FR ) into it. The first transmission lobe ( SK1 ), however, now has an enlarged first effective transmission aperture angle ( α1 ' ) on. In the subspace of the free space ( FR ) this so expanded first transmission lobe ( SK1 ) the first station is now broadcasting ( H1 ) on emission with the help of the additional device.

The second optical transmitter ( H2 ) then also emits the second radiation lobe with the additional device ( SK2 ) in the free space ( FR ) into it. The second transmission lobe ( SK2 ), however, now has an enlarged second effective transmission aperture angle ( α2 ' ) on. In the subspace of the free space ( FR ) this so expanded second transmission lobe ( SK2 ) the second transmitter is now broadcasting ( H2 ) on emission with the help of the additional device.

Recipient ( D. ) now has a sensitivity lobe ( EK ) in the free space ( FR ) with an effective reception angle ( β ' ) on. In this extended reception lobe ( EK ) radially radiating objects placed there can again enter the receiver ( D. ) and the receiver output signal ( S0 ) influence.

The additional devices ( DH1 , DH2 , DD ), the device proposed here is characterized by the fact that the effective first transmission aperture angle ( α1 ' ) is greater than the first transmission aperture angle ( α1 ) and that in this plane the effective second transmission aperture angle ( α2 ' ) is greater than the second transmission aperture angle ( α2 ) and that in this plane the effective aperture angle ( β ' ) is greater than the reception aperture angle ( β ).

This will reduce the dead space ( NDA ) is reduced and the area in which gesture recognition is not possible is reduced. This is in 2 shown.

The first optical diffuser ( DH1 ) can be the same as the second optical diffuser ( DH2 ) be the first optical diffuser ( DH1 ) same as the other optical diffuser ( DD ) and the second optical diffuser ( DH2 ) same as the other optical diffuser ( DD ) being.

This is in 3 shown.

In the state of the art, a diffuser or a diffuser (Latin for diffundere, “pour out”, “scatter”, “spread out”) is an optical component that is used to scatter light. The effects used are typically diffuse reflection and refraction of light. It is known from light measurement technology to use diffusers to give a detector increased sensitivity for a large solid angle range. It is also known to achieve an angle-dependent sensitivity for such detectors which follows LAMBERT's law.

In another embodiment of the invention, the optical object recognition system comprises at least one first transmitter ( H1 ) and a second transmitter ( H2 ), as well as a compensation transmitter ( K ) and a recipient ( D. ). The first sender ( H1 ) has a first transmitter wavelength. The second transmitter ( H2 ) has a second transmitter wavelength. The first transmitter wavelength of the radiation from the first transmitter ( H1 ) should preferably be in the wavelength range that is visible to a human being.

The modulation of the amplitude of the radiation from the first transmitter ( H1 ) by means of the first transmission signal ( S5_1 ) is preferably carried out with a lower limit frequency (f _u ). This lower limit frequency (f _u ) is preferably so high that the human eye can no longer perceive this flickering.

The first sender ( H1 ) emits a first radiation lobe ( SK1 ) in a free space ( FR ) in front of the object recognition system. The second transmitter ( H2 ) radiates with a second radiation lobe ( SK2 ) in a free space ( FR ) in front of the object recognition system.

Recipient ( D. ) receives the from objects in the first radiation lobe ( SK1 ) reflected light from the first transmitter ( H1 ) and that of these objects in the second radiation lobe ( SK2 ) reflected light from the second transmitter ( H2 ) superimposed. Recipient ( D. ) generates a receiver output signal ( S0 ). The compensation transmitter ( K ) radiates into the receiver ( D. ) via a transmission link (13) and thus influences the receiver output signal ( S0 ) Likewise. The influences on the receiver output signal are preferred ( S0 ) linearly dependent on the total amplitude of the overlapping irradiations.

The current emission of the compensation transmitter ( K ) in the transmission path (13) depends preferably in a linear manner on the current value of a compensation transmission signal ( S3 ) away.

The radiation from the space of a sensitivity lobe ( EK ) Recipient ( D. ) into the recipient ( D. ) and the radiation from the compensation transmitter ( K ) into the recipient ( D. ) are preferably superimposed summing up in the receiver ( D. ). The first optical transmitter ( H1 ) is typically dependent on a first transmission signal ( S5_1 ) modulated. The second optical transmitter ( H2 ) is preferably typically dependent on a second transmission signal ( S5_2 ) modulated.

The regulator ( CTR ) now regulates depending on the receiver output signal ( S0 ) and depending on the first transmission signal ( S5_1 ) and depending on the second transmission signal ( S5_2 ) the compensation transmission signal ( S3 ) in such a way that the receiver output signal ( S0 ) essentially, i.e., apart from system noise and control errors, no components of the first transmission signal ( S5_1 ) and the second transmission signal ( S5_2 ) has more,

A control value of the controller ( CTR ) typically provides a measured value for the distance and / or the reflectivity and / or another optical property of an object in the free space ( FR ) in front of the optical sensor system. This measured value can be used for gesture recognition by a feature extraction and, for example, by a subsequent neural network or a subsequent HMM recognizer. These functions are carried out either in special circuits or in signal processors or the like.

It has now been recognized that it makes sense if at least one of the transmitters, for example the first transmitter ( H1 ), as a lamp for illuminating any objects that may be present within the beam of the first transmitter ( H1 ) is used to make these objects visible to the human eye. To do this, the modulation of the first transmission signal ( S5_1 ) with which the first station ( H1 ) is controlled, be so fast that the sluggishness of the human eye causes this flickering of the brightness of the first transmitter ( H1 ) and thus the person does not perceive this flickering.

The first radiation lobes preferably overlap ( SK1 ) of the first station ( H1 ) and the second radiation lobe of the second transmitter ( H2 ). This has the advantage that the object can then optionally be sent to the first transmitter ( H1 ) or the second transmitter ( H2 ) can be illuminated. The first transmitter transmits on a first transmitter wavelength for its optical radiation. For example, it can emit blue light. The second transmitter ( H2 ) transmits on a second transmitter wavelength. This second transmitter wavelength of the second transmitter ( H2 ) can be visible or invisible to the human eye. If the light from the second transmitter is infrared light, it is invisible to the human eye, for example. The second transmitter ( H2 ) can also have a second transmitter wavelength that is visible but different from the first transmitter wavelength. For example, the light of the second transmitter ( H2 ) also be about red light. By changing the intensity ratio between the envelope amplitude of the light from the first transmitter ( H1 ) and the envelope curve amplitude of the light from the second transmitter ( H2 ) depending on the type of second transmitter used ( H2 ) thus either
Firstly, the brightness of the sensor system perceptible by a person can be changed without changing the total irradiation intensity and thus the recognition properties of a gesture recognition system using this sensor system, or
secondly, the color of the lighting from the first transmitter perceived by a person ( H1 ) and second transmitter ( H2 ) of an object in the overlap area can be changed.

First we consider the case that the second transmitter wavelength corresponds to the emission of the second transmitter ( H2 ) lies in the wavelength range that is invisible to a human being. This second transmitter (h2) is thus used as a replacement transmitter when the lighting is dimmed down by the user by the first transmitter.

In this case the controller regulates ( CTR ) by means of a visibility parameter specified by the user or another device, in particular in the form of a brightness value and / or in the form of the value of a brightness control signal (HRS), the envelope curve radiation amplitude of the first transmitter ( H1 ) and the second transmitter ( H2 ). This regulation is preferably carried out in the opposite direction, so that the receiver output signal ( S0 ) does not change if the situation in the free space in front of the system does not change.

The regulator ( CTR ) therefore preferably increases the envelope radiation amplitude of the second transmitter ( H2 ) if it is the envelope radiation amplitude of the first transmitter ( H1 ) is decreased as a result of such a user request or system specification and it decreases the envelope radiation amplitude of the second transmitter ( H2 ) if it is the envelope radiation amplitude of the first transmitter ( H1 ) elevated.

The controller preferably regulates ( CTR ) thus the envelope radiation amplitude of the second transmitter ( H2 ) so that when there is a change in the envelope radiation amplitude of the first transmitter ( H1 ) received from the recipient ( D. ) Received envelope curve radiation amplitude of the total radiation quantities of the radiation from the first transmitter reflected by objects ( H1 ) and the radiation from the second transmitter ( H2 ) does not change in total if there is no change in the reflection conditions in the free space ( FR ) is present.

Of course, the system can be supplemented with additional transmitters and receivers. For example, an optical object recognition system can be expanded to include a third transmitter ( H3 ) having. The third optical transmitter ( H1 ) is analogue with a third transmission signal ( S5_3 ) modulated. The regulator ( CTR ) then regulates depending on the receiver output signal ( S0 ) and depending on the first transmission signal ( S5_1 ) and depending on the second transmission signal ( S5_2 ) and depending on the third transmission signal ( S5_3 ) the compensation transmission signal ( S3 ) in such a way that the receiver output signal ( S0 ) essentially, i.e., apart from system noise and control errors, no components of the first transmission signal ( S5_1 ) and the second transmission signal ( S5_2 ) and the third transmission signal ( S5_2 ) has more. The radiation from the third transmitter is preferred ( H3 ) visible. The regulator ( CTR ) the first envelope curve radiation amplitude of the first transmitter ( H1 ) and third envelope radiation amplitude of the third transmitter ( H3 ) regulate or set. In the context of this document, visible means that the third transmitter wavelength of the emission of the third transmitter ( H3 ) lies in the wavelength range that is visible to a human being. The third transmitter ( H3 ) then also radiates with a third radiation lobe ( SK3 ) in the free space ( FR ) in front of the optical object recognition system. The first radiation lobe ( SK1 ) and the second radiation lobe ( SK2 ) and the third radiation lobe ( SK3 ) are preferably superimposed in at least one spatial area within the free space in front of the optical object recognition system. This area of space is referred to below with the term “white space”. The first transmitter wavelength preferably differs from the third transmitter wavelength. For example, the color of the first transmitter perceived by a person is preferably different ( H1 ) from the color of the third transmitter ( H3 ). Thus, first of all, a setting of the total brightness of the radiation of the sensor system perceived by a human being by means of the invisible light of the second transmitter ( H2 ) in its function as a common replacement transmitter for the possibly darkened first transmitter ( H1 ) and the possibly darkened third transmitter ( H3 ) possible. On the other hand, by changing the distribution of the total radiation intensity between the individual radiation intensities of the first transmitter ( H1 ) and the third transmitter ( H3 ) the color of the radiation of the sensor system perceived by a human being changed. This can be done without the measuring properties of the sensor system being impaired, since the total radiation intensity of the first transmitter ( H1 ) and the second transmitter ( H2 ) and the third transmitter ( H3 ) can be kept constant.

If the color of the color of the first transmitter perceived by a person ( H1 ) complementary to the color of the third transmitter perceived by a human being ( H3 ) is selected, then typically includes the permissible one Range of values of the mixing parameter for the intensity mixture between the intensity of the radiation of the first transmitter (h1) and the intensity of the radiation of the third transmitter ( H3 ) a value of this mixing parameter which leads to a total irradiation of a white object in the white space, which makes this object appear white to a human observer.

The regulator ( CTR ) preferably controls the envelope radiation amplitude of the second transmitter ( H2 ) so that when there is a change in the envelope radiation amplitude of the first transmitter ( H1 ) and / or when the envelope radiation amplitude of the third transmitter changes ( H3 ) received from the recipient ( D. ) Received envelope curve radiation amplitude of the total radiation quantities of the radiation from the first transmitter reflected by objects ( H1 ) and the radiation from the second transmitter ( H2 ) and the radiation from the third transmitter ( H3 ) does not change in total if there is no change in the reflection conditions in the free space ( FR ) is present.

This principle can be extended quite generally to a three-color light source. This then results in an optical object recognition system with an additional third transmitter ( H3 ), an additional fourth transmitter ( H4 ) compared to the basic version with a first transmitter ( H1 ) and a second transmitter ( H2 ). The third optical transmitter ( H1 ) is with a third transmission signal ( S5_3 ) modulated. The fourth optical transmitter ( H1 ) is with a fourth transmission signal ( S5_3 ) modulated. The regulator ( CTR ) now regulates depending on the receiver output signal ( S0 ) and depending on the first transmission signal ( S5_1 ) and depending on the second transmission signal ( S5_2 ) and depending on the third transmission signal ( S5_3 ) and depending on the fourth transmission signal ( S5_4 ) the compensation transmission signal ( S3 ). Gies leads the controller ( CTR ) in such a way that the receiver output signal ( S0 ) essentially, i.e., apart from system noise and control errors, no components of the first transmission signal ( S5_1 ) and no components of the second transmission signal ( S5_2 ) and no components of the third transmission signal ( S5_2 ) and no components of the fourth transmission signal ( S5_4 ) has more. The regulator ( CTR ) the said mixing parameter, in particular in the form of a color value and / or in the form of the value of a color value control signal (HRS), the first envelope curve radiation amplitude of the first transmitter ( H1 ) and the third envelope radiation amplitude of the third transmitter ( H3 ) and the fourth envelope radiation amplitude of the fourth transmitter ( H4 ) rules. This is preferably done without changing the overall impression of brightness for a person. The basis of this control is an RGB color model. Of course, other color models can also be used for other color spaces. These are included in the stress. An exemplary list of color spaces can be found on Wikipedia under “List of color spaces”. For an application of an RGB color model, of course, the third transmitter wavelength of the emission of the third transmitter ( H3 ) are in the wavelength range that is visible to a human being and the fourth transmitter wavelength is the radiation of the fourth transmitter ( H4 ) lies in the wavelength range visible to the human eye. For example, it is conceivable that the emission of the first transmitter ( H1 ) leads to a red impression on a human observer and that the emission of the third transmitter ( H3 ) leads to a greenish impression and that the emission of the fourth transmitter ( H4 ) leads to a bluish impression. Exemplary color systems are: CIE 1931 XYZ, CIELUV, CIELAB, CIEUVW, sRGB, Adobe RGB, Adobe Wide Gamut RGB, YIQ, YUV, YDbDr, YPbPr, YCbCr, xvYCC, HSV, HSL, CMYK.

In addition, it is conceivable to further improve the color resolution. For example, it is conceivable to provide a fifth transmitter that works in an analogous manner to the fourth transmitter ( H4 ) is supplemented and operated, and which emits white light.

Back, for example, with four channels. The third station preferably broadcasts ( H3 ) with a third radiation lobe ( SK3 ) in the free space ( FR ) in front of the optical object recognition system and the fourth transmitter ( H4 ) preferably emits a fourth beam ( SK4 ) in the free space ( FR ) in front of the optical object recognition system. The first radiation lobe ( SK1 ) and the second radiation lobe ( SK2 ) and the third radiation lobe ( SK3 ) and the fourth radiation lobe ( SK4 ) preferably overlap in at least one spatial area within the free space in front of the optical object recognition system, the spatial area again referred to below with the term “white space”.

The first transmitter wavelength preferably differs from the third transmitter wavelength and the fourth transmitter wavelength, the fourth transmitter wavelength also preferably differing from the third transmitter wavelength in order to enable RGB lighting.

The permissible range of values of the mixing parameter then typically includes, with the correct choice of the colors (= the transmitter wavelengths) of the light emission from these transmitters, again a value of the mixing parameter with which the controller ( CTR which leads to a total irradiation of a white object in the white space, which makes this object appear as white to a human observer. By changing this mixing parameter, the light of the optical sensor system then appears in one of the colors specified by the mixing parameter.

In addition, the controller ( CTR ) the envelope radiation amplitude of the second transmitter ( H2 ) so that when there is a change in the envelope radiation amplitude of the first transmitter ( H1 ) and / or when the envelope radiation amplitude of the third transmitter changes ( H3 ) and / or when the envelope radiation amplitude of the fourth transmitter changes ( H4 ) received from the recipient ( D. ) Received envelope curve radiation amplitude of the total radiation quantities of the radiation from the first transmitter reflected by objects ( H1 ) and the radiation from the second transmitter ( H2 ) and the radiation from the third transmitter ( H3 ) and the radiation of the fourth transmitter ( H4 ) does not change in total if there is no change in the reflection conditions in the free space ( FR ) is present. The luminous appearance of the sensor system can thus be dimmed without the measurement properties being reduced.

In order to be able to measure something, the time course of the said control value of the controller ( CTR ) used for gesture recognition. In this context, refer to the German patent application DE 10 2012 010 627 A1 , DE 10 2014 019 172 A1 , DE 10 2013 019 660 A1 referenced. Also here is the European script EP 2 817 657 B1 , EP 2 936 201 A1 , EP 2 679 982 A1 , EP 2 016 480 A2 referenced.

In connection with gesture recognition, such a system can at least in part be able to provide parameters of operating functions of a vehicle as a function of the time course of said control value of the controller CTR ) change.

advantage

Such a modified optical structure also enables gesture recognition directly in front of the sensor system. The advantages are not limited to this.

List of reference symbols

α1

first transmission opening angle;

α1 '

effective first transmission opening angle;

α2

second transmission opening angle;

α2 '

effective second transmission opening angle;

β

Reception opening angle;

β '

effective reception opening angle;

Ctr

Regulator;

D.

Recipient;

DD

optical diffuser, for the radiation emanating from the area of the free space ( FR ) into the recipient ( D. ) arrives;

DH1

first optical diffuser for the radiation from the first transmitter ( H1 );

DH2

second optical diffuser for the radiation from the second transmitter ( H2 );

EK

Receiving lobe;

FR

Free space in front of the sensor system;

G

Glass plate or for the radiation from the transmitter ( H1 , H2 ) optically transparent cover of the sensor system;

H1

first transmitter;

H2

second transmitter;

H3

third transmitter;

H4

fourth transmitter;

I3

third transmission link;

K

Compensation transmitter;

NDA

Non-reception area, also known as dead space;

S0

Receiver output signal;

S3

Compensation transmission signal;

S5_1

first transmission signal. The first transmission signal can be identical to or synchronous with the other transmission signals;

S5_2

second transmission signal. The second transmission signal can be identical to or synchronous with the other transmission signals;

S5_3

third transmission signal. The third transmission signal can be identical to or synchronous with the other transmission signals;

S5_4

fourth broadcast signal. The fourth transmission signal can be identical to or synchronous with the other transmission signals;

SK1

first transmission lobe of the light emission of the first transmitter ( H1 ). The first transmission lobe is superimposed in the free space ( FR ) preferably with the second transmission lobe ( SK2 ) and, if applicable, the third transmission lobe ( SK3 ) and, if applicable, the fourth transmission lobe ( SK4 ) and the receiving lobe ( EK );

SK2

second transmission lobe of the light emission of the second transmitter ( H2 ) The second transmission lobe is superimposed in the free space ( FR ) preferably with the first transmission lobe ( SK1 ) and, if applicable, the third transmission lobe ( SK3 ) and, if applicable, the fourth transmission lobe ( SK4 ) and the receiving lobe ( EK );

SK3

third transmission lobe of the light emission of the second transmitter ( H2 ). The third transmission lobe is superimposed in the free space ( FR ) preferably with the first transmission lobe ( SK1 ) and with the second transmission lobe ( SK2 ) and, if applicable, the fourth transmission lobe ( SK4 ) and the receiving lobe ( EK );

SK4

fourth transmission lobe of the light emission of the second transmitter ( H2 ). The fourth transmission lobe is superimposed in the free space ( FR ) preferably with the first transmission lobe ( SK1 ) and the second transmission lobe ( SK2 ) and the third transmission lobe ( SK3 ) and the receiving lobe ( EK );

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102012010627 A1 [0052]
• DE 102014019172 A1 [0052]
• DE 102013019660 A1 [0052]
• EP 2817657 B1 [0052]
• EP 2936201 A1 [0052]
• EP 2679982 A1 [0052]
• EP 2016480 A2 [0052]

Claims (14)

Optical sensor system, which can be provided in particular for a gesture recognition system, - With a plurality of optical transmitters (H1, H2) comprising a first transmitter (H1) and a second transmitter (H2) and - with at least one receiver (D) and - with a controller (CT) and - with at least one compensation transmitter (K) and - The first optical transmitter (H1) without additional device having a first emission lobe (SK1) into a free space (FR) with a first transmission aperture angle (α1) into which the first transmitter (H1) radiates upon emission and - wherein the second optical transmitter (H2) without additional device has a second radiation lobe (SK2) into the free space (FR) with a second transmission aperture angle (α2) and - The receiver (D) without an additional device has a sensitivity lobe (EK) into the free space (FR) with a receiving aperture angle (β) in which radially radiating objects placed there can radiate into the receiver (D) and the receiver output signal (S0 ) can influence and - wherein the compensation transmitter (K) radiates into the receiver (D) via a transmission path (13) and influences the receiver output signal (S0) and - The transmission path (13) of the radiation from the compensation transmitter (K) into the receiver (D) can be independent of the sensitivity lobe (EK) and - The emission of the compensation transmitter (K) depends on a compensation transmission signal (S3) and - The irradiation from the space of the sensitivity lobe (EK) of the receiver (D) in the receiver (D) and the irradiation of the compensation transmitter (K) in the receiver (D) superimposed summing in the receiver (D) and - The first optical transmitter (H1) being modulated with a first transmission signal (S5_1) and - The second optical transmitter (H2) being modulated with a second transmission signal (S5_2) and - wherein the controller (CTR) as a function of the receiver output signal (S0) and as a function of the first transmission signal (S5_1) and as a function of the second transmission signal (S5_2) regulates the compensation transmission signal (S3) in such a way that the receiver output signal (S0 ) essentially, i.e. apart from system noise and control errors, no longer has any components of the first transmission signal (S5_1) and the second transmission signal (S5_2), - wherein a control value of the controller (CTR) represents a measured value for the distance and / or the reflectivity and / or another optical property of an object in the free space (FR) in front of the optical sensor system, characterized in that - That, as an additional device, a first optical diffuser (DH1) is arranged between the first transmitter (H1) and the free space (FR) and - That as an additional device, a second optical diffuser (DH2) is arranged between the second transmitter (H2) and the free space (FR) and - That as an additional device, a further optical diffuser (DD) is arranged between the receiver (D) and the free space (FR) and - wherein the first optical diffuser (DH1) can be the same as the second optical diffuser (DH2) and - wherein the first optical diffuser (DH1) can be the same as the further optical diffuser (DD) and - wherein the second optical diffuser (DH2) can be the same as the further optical diffuser (DD) and - The first optical transmitter (H1) with an additional device having the first emission lobe (SK1) into the free space (FR) with a first effective transmission aperture angle (α1 ') into which the first transmitter (H1) radiates when emitting with an additional device, and - The second optical transmitter (H2) with additional device having the second radiation lobe (SK2) into the free space (FR) with a second effective transmission aperture angle (α2 ') into which the second transmitter (H2) radiates when emitting with additional device, and - The receiver (D) with an additional device has a sensitivity lobe (EK) into the free space (FR) with an effective receiving aperture angle (β ') in which radially radiating objects placed there can radiate into the receiver (D) and the receiver output signal (S0) can influence and - That in a plane the effective first transmission opening angle (α1 ') is greater than the first transmission opening angle (α1) and - That in this plane the effective second transmission opening angle (α2 ') is greater than the second transmission opening angle (α2) and - That in this plane the effective reception opening angle (β ') is greater than the reception opening angle (β). Optical object recognition system, - with a first transmitter (H1) and - with a second transmitter (H2) and - with a compensation transmitter (K) and - with a receiver (D), - wherein the first transmitter (H1) has a first transmitter wavelength and - wherein the second transmitter (H2) has a second transmitter wavelength and - wherein the first transmitter wavelength of the radiation of the first transmitter (H1) lies in the wavelength range visible to a human - wherein the first transmitter (H1) with a first radiation lobe (SK1) in a free space (FR) radiates in front of the object recognition system and - wherein the second transmitter (H2) radiates with a second radiation lobe (SK2) into a free space (FR) in front of the object recognition system and - wherein the receiver (D) receives the information from objects in the first radiation lobe (SK1 ) receives reflected light from the first transmitter (H1) and - the receiver (D) receiving the light from the second transmitter (H2) reflected by objects in the second emission lobe (SK2) - the receiver (D) depending on this radiation Receiver output signal (S0) generated and - wherein the compensation transmitter (K) radiates into the receiver (D) via a transmission path (13) and the receiver output signal (S0) be influences and - where the emission of the compensation transmitter (K) in the transmission path (13) depends on a compensation transmission signal (S3) and - where the irradiation from the area of a sensitivity lobe (EK) of the receiver (D) into the receiver (D) and superimpose the radiation of the compensation transmitter (K) in the receiver (D) summing in the receiver (D) and - wherein the first optical transmitter (H1) is modulated with a first transmission signal (S5_1) and - the second optical transmitter (H2) with a second transmission signal (S5_2) is modulated and - wherein the controller (CTR) as a function of the receiver output signal (S0) and as a function of the first transmission signal (S5_1) and as a function of the second transmission signal (S5_2) the compensation transmission signal (S3) in regulates the way that the receiver output signal (S0) essentially, ie apart from system noise and control errors, no more components of the first transmission signal (S5_1) and the second transmission signal (S5_2) - wherein a control value of the controller (CTR) represents a measured value for the distance and / or the reflectivity and / or another optical property of an object in the free space (FR) in front of the optical sensor system, characterized in that, - the first transmitter (H1 ) serves as a light source to illuminate any objects that may be present within its radiation lobe in order to make these objects visible to the human eye. Optical object recognition system according to Claim 2 - wherein the first radiation lobe (SK1) of the first transmitter (H1) and the second radiation lobe of the second transmitter (H2) overlap and - wherein the second transmitter wavelength of the radiation of the second transmitter (H2) lies in the wavelength range that is not visible to a human being. Optical object recognition system according to Claim 3 - wherein the controller (CTR) can regulate the envelope curve radiation amplitude of the first transmitter (H1) and the second transmitter (H2) by means of a visibility parameter, in particular in the form of a brightness value and / or in the form of the value of a brightness control signal (HRS), and the controller (CTR) increases the envelope radiation amplitude of the second transmitter (H2) if it decreases the envelope radiation amplitude of the first transmitter (H1) and - the controller (CTR) decreases the envelope radiation amplitude of the second transmitter (H2) if it decreases the envelope radiation amplitude of the first transmitter ( H1) increased. Optical object recognition system according to Claim 4 - wherein the controller (CTR) readjusts the envelope curve radiation amplitude of the second transmitter (H2) so that when the envelope curve radiation amplitude of the first transmitter (H1) changes, the envelope curve radiation amplitude received by the receiver (D) of the total amount of radiation from the radiation of the first transmitter (H1) received by objects ) and the radiation of the second transmitter (H2) does not change in total if there is no change in the reflection conditions in the free space (FR). Optical object recognition system according to Claim 5 - With a third transmitter (H3) and - wherein the third optical transmitter (H1) is modulated with a third transmission signal (S5_3) and - wherein the controller (CTR) as a function of the receiver output signal (S0) and as a function of the first transmission signal (S5_1) and as a function of the second transmission signal (S5_2) and as a function of the third transmission signal (S5_3), the compensation transmission signal (S3) regulates in such a way that the receiver output signal (S0) is essentially none, i.e. apart from system noise and control errors Has more components of the first transmission signal (S5_1) and the second transmission signal (S5_2) and the third transmission signal (S5_2) and - the controller (CTR) using a mixing parameter, in particular in the form of a color value and / or in the form of the value of a color value control signal ( HRS), the first envelope curve radiation amplitude of the first transmitter (H1) and the third envelope curve radiation amplitude of the third transmitter (H3) can regulate and - the third transmitter wavelength ge the emission of the third transmitter (H3) lies in the wavelength range visible to a human and - the third transmitter (H3) with a third emission lobe (SK3) irradiating into the free space (FR) in front of the optical object recognition system and - the first emission lobe (SK1) and the second radiation lobe (SK2) and the third radiation lobe (SK3) in at least one spatial area within the free space in front of the optical object recognition system, the spatial area referred to below with the term “white space”, overlap and - wherein the first transmitter wavelength differs from the third transmitter wavelength. Optical object recognition system according to Claim 6 - wherein the permissible range of values of the mixing parameter comprises a value of the mixing parameter which leads to a total irradiation of a white object in the white space, which makes this object appear white to a human observer. Optical object recognition system according to Claim 6 or 7th - wherein the controller (CTR) readjusts the envelope radiation amplitude of the second transmitter (H2) so that when the envelope radiation amplitude of the first transmitter (H1) changes and / or when the envelope radiation amplitude of the third transmitter (H3) changes, the amount received from the receiver (D) Received envelope radiation amplitude of the total amount of radiation reflected by objects of the radiation from the first transmitter (H1) and the radiation from the second transmitter (H2) and the radiation from the third transmitter (H3) does not change in total if there is no change in the reflection conditions in the free space (FR) . Optical object recognition system according to Claim 5 - with a third transmitter (H3) and - with a fourth transmitter (H4) and - wherein the third optical transmitter (H1) is modulated with a third transmission signal (S5_3) and - wherein the fourth optical transmitter (H1) with a fourth transmission signal (S5_3) is modulated and - where the controller (CTR) - as a function of the receiver output signal (S0) and - as a function of the first transmission signal (S5_1) and - as a function of the second transmission signal (S5_2) and - as a function of the third transmission signal (S5_3) and - depending on the fourth transmission signal (S5_4) - the compensation transmission signal (S3) corrects in such a way that the receiver output signal (S0) essentially, i.e. no components except for system noise and control errors, of the first transmission signal ( S5_1) and - the second transmission signal (S5_2) and - the third transmission signal (S5_2) and - the fourth transmission signal (S5_4) has more and - the controller (CTR) using a mixing parameter, in particular in the form of a color value and / or in the form of the value of a color value control signal (HRS), the first envelope curve radiation amplitude of the first transmitter (H1) and third envelope curve radiation amplitude of the third transmitter (H3) and fourth envelope curve radiation amplitude of the fourth transmitter (H4) can regulate and - the third transmitter wavelength of the radiation of the third transmitter (H3) is in the wavelength range visible to a human and - the fourth transmitter wavelength of the radiation of the fourth transmitter (H4) being in the wavelength range visible to the human eye and - the third transmitter (H3) with a third radiation lobe (SK3 ) radiates into the free space (FR) in front of the optical object recognition system and - the fourth transmitter (H4) with a fourth emission lobe (SK4) radiates into the free space (FR) in front of the optical object recognition system and - the first emission lobe (SK1) and the second radiation lobe (SK2) and the third radiation lobe (SK3) and the fourth radiation lobe (SK4 ) overlap in at least one spatial area within the free space in front of the optical object recognition system, the spatial area referred to below with the term "white space" and - the first transmitter wavelength differing from the third transmitter wavelength and - the first transmitter wavelength differing from the fourth transmitter wavelength and - wherein the fourth transmitter wavelength differs from the third transmitter wavelength. Optical object recognition system according to Claim 9 - wherein the permissible range of values of the mixing parameter comprises a value of the mixing parameter which leads to a total irradiation of a white object in the white space, which makes this object appear white to a human observer. Optical object recognition system according to Claim 9 or 10 - wherein the controller (CTR) readjusts the envelope radiation amplitude of the second transmitter (H2) so that when there is a change in the envelope radiation amplitude of the first transmitter (H1) and / or when there is a change in the envelope radiation amplitude of the third transmitter (H3) and / or when there is a change the envelope radiation amplitude of the fourth transmitter (H4) the envelope radiation amplitude received by the receiver (D) of the total radiation quantities of the radiation from the first transmitter (H1) and the radiation from the second transmitter (H2) and the radiation from the third transmitter (H3) and the radiation of the fourth transmitter (H4) does not change in total if there is no change in the reflection conditions in the free space (FR). Optical object recognition system according to one or more of the Claims 1 until 11 - The time course of said control value of the controller (CTR) being used at least in part for a gesture recognition. Optical object recognition system according to one or more of the Claims 1 until 12th - At least in two cases parameters of operating functions of a vehicle are changed as a function of the time course of said control value of the controller (CTR). Optical object recognition system, - with a first transmitter (H1) and - with a second transmitter (H2) and - with a receiver (D), - wherein the first transmitter (H1) has a first transmitter wavelength and - wherein the second transmitter (H2) has a second transmitter wavelength and - The first transmitter wavelength of the radiation from the first transmitter (H1) being in the wavelength range that is visible to a person - wherein the first transmitter (H1) radiates with a first radiation lobe (SK1) in a free space (FR) in front of the object recognition system and - wherein the second transmitter (H2) radiates with a second radiation lobe (SK2) in a free space (FR) in front of the object recognition system and - The receiver (D) receiving the light from the first transmitter (H1) reflected by objects in the first emission lobe (SK1) and - The receiver (D) receiving the light from the second transmitter (H2) reflected by objects in the second emission lobe (SK2) - The receiver (D) generating a receiver output signal (S0) as a function of these irradiations and - The irradiations from the space of a sensitivity lobe (EK) of the receiver (D) in the receiver (D) in the receiver (D) superimposing and adding up in the receiver (D) - The first optical transmitter (H1) being modulated with a first transmission signal (S5_1) and - The second optical transmitter (H2) being modulated with a second transmission signal (S5_2) and - The controller (CTR) depending on the receiver output signal (S0) and depending on the first transmission signal (S5_1) and depending on the second transmission signal (S5_2) a measured value signal for a measured value for the distance and / or the reflectivity and / or another optical property of an object in the free space (FR) generated in front of the optical sensor system, characterized in that - That the first transmitter (H1) serves as a light source for illuminating any objects that may be present within its radiation lobe in order to make these objects visible to the human eye.

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