DE102020101997B4 - Gesture recognition device for the interior lighting of vehicles with a small dead space in front of the sensor system - Google Patents

Abstract

Use of an optical object recognition system for illuminating objects that may be present within its radiation lobe in order to make these objects visible to the human eye, the optical object recognition system having a first transmitter (H1) and a second transmitter (H2) and is provided with a compensation transmitter (K) and- with a receiver (D) and- 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 corresponds to the radiation of the first transmitter (H1) is in the wavelength range visible to humans- the first transmitter (H1) radiating with a first radiation lobe (SK1) into a free space (FR) in front of the object recognition system and- the second transmitter (H2) with a second radiation lobe (SK2) radiates into a free space (FR) in front of the object recognition system and- wherein the receiver (D) of 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 radiation lobe (SK2)- the receiver (D) depending on a receiver output signal (S0) is generated from these radiations and- the compensating transmitter (K) radiates into the receiver (D) via a transmission path (13) and influences the receiver output signal (S0) and- the emission of the compensating transmitter (K) enters the transmission path ( 13) depends on a compensation transmission signal (S3) and- whereby the irradiation from the space of a sensitivity lobe (EK) of the receiver (D) in the receiver (D) and the irradiation of the compensation transmitter (K) in the receiver (D) add up in Superimposed on the receiver (D) and- the first optical transmitter (H1) being modulated with a first transmission signal (S5_1) and- the second optical transmitter (H2) having a second transmission signal ( S5_2) is modulated 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) regulating the compensation transmission signal (S3) in the way that the receiver output signal (S0) essentially, ie 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),- a control value of the controller (CTR) being a measured value for the distance and/or or represents 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 for illuminating objects that may be present within its radiation lobe, in order to identify these objects for to make the human eye visible and- the modulation of the first transmission signal (S5_1) with which the first optical transmitter (H1) sat is expensive, is so fast that the sluggishness of the human eye covers the flickering of the brightness of the first transmitter (H1) and thus the human being essentially does not perceive this flickering.

Description

generic term

The invention is directed to an optical sensor system for a gesture recognition system. It is preferably a gesture recognition device that 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 includes a plurality of optical transmitters (H1, H2). In particular, this involves at least a first transmitter (H1) and a second transmitter (H2). Furthermore, the optical sensor system preferably has at least one receiver (D) and one controller (CTR) and at least one compensation transmitter (K).

The first optical transmitter (H1), preferably without additional devices, has a first radiation lobe (SK1) in a free space (FR) in front of the sensor system. This first radiation lobe (SK1) typically has a first transmission opening angle (α1). The first transmitter (H1) radiates into this first part of the free space (FR) in front of the sensor system, which is determined by the first transmission lobe (SK1). The first transmitter (H1) radiates into this partial space of the first transmission lobe (SK1) during emission.

The second optical transmitter (H2), preferably without additional devices, has a second radiation lobe (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 partial space of the free space (FR) in front of the sensor system, which is determined by the second transmission lobe (SK2). The second transmitter (H2) radiates into this second partial space of the second transmission lobe (SK2) during emission.

In analogy to this, the receiver (D) without an additional device has a sensitivity lobe (EK) that extends into the free space (FR) in front of the sensor system. The reception lobe (EK) has a reception opening angle (β). If radially radiating objects are placed in the partial space of the free space (FR) in front of the sensor system, which is characterized by this reception lobe, then these radiate into the receiver (D). Radiating objects placed within the partial space of the receiver lobe (EK) can therefore influence the receiver output signal (S0) of the receiver (D).

If a reflective object is placed in the area of intersection between the first transmission lobe (SK1) of the first transmitter (H1) and the reception lobe (EK) of the receiver (D), the first transmitter (H1) can irradiate this object and the object can then irradiate the reflected object Beam the light signal from the first transmitter (H1) into the receiver (D). This results in a first transmission path from the first transmitter (H1) via the reflecting object to the receiver (D).

If a reflecting object is placed in the area of intersection between the second transmission lobe (SK2) of the second transmitter (H2) and the reception lobe (EK) of the receiver (D), the second transmitter (H12) can irradiate this object and the object can then irradiate the reflected one Beam the light signal from the second transmitter (H2) into the receiver (D). This results in a second transmission path from the second transmitter (H2) via the reflecting object to the receiver (D).

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

The third transmission path (13) of the radiation from the compensating transmitter (K) into the receiver (D) is preferably independent of the sensitivity lobe (EK).

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

The irradiation from the area 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) are superimposed, preferably summing up, in the receiver (D).

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

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

A controller (CTR) now generates the compensation transmission signal (S3) 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 controller (CTR) regulates the compensation transmission signal (S3) in such a way that the receiver output signal (S0) essentially has no signal components as a result of the summing overlays, ie apart from system noise and control errors the first transmission signal (S5_1) and the second transmission signal (S5_2) has more.

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

In the prior art, there is now a non-sensitive non-reception area (NDA) in the immediate area in front of the receiver (D), in which the reception lobe (EK) does not intersect with one of the other transmission lobes (SK1, SK2). Accordingly, although an emitting object can send light into the receiver (D), a reflecting object is not illuminated 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 no gesture recognition is possible. this is in 1 shown.

From the DE 10 2013 019 660 A1 a device for measuring the characteristics of animals and humans by means of a so-called Halios ^® system is known. From the DE10 2017 217 916 A1 an optical, flat expansion element is known. From the DE 10 2006 034 817 A1 the use of a diffuser in an aircraft light source is known. From the DE 10 2012 010 627 A1 the use of an optical measurement system based on the Halios ^® principle for gesture recognition is known DE 10 2014 019 172 A1 the use of an optical measuring system according to the Halios ^® principle for detecting smoke and haze is known. From the EP 28 17 657 B1 the use of several Halios ^® control circuits and spread code modulated transmission signals for a Halios ^® system for gesture recognition is known.

task

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

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

solution of the task

In a sensor system of the type described above, the object is achieved according to the proposal by suitably modifying the shape of the reception and transmission lobes.

The system proposed here is characterized in that a first optical diffuser (DH1) is additionally arranged as an additional device between the first transmitter (H1) and the free space (FR) and that a second optical diffuser (DH2) is additionally arranged as an additional device between the second transmitter (H2) and the free space (FR) is arranged and that a further optical diffuser (DD) is additionally arranged between the receiver (D) and the free space (FR) as an additional device. These optical diffusers widen 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 radiates the first radiation lobe (SK1) into the free space (FR) with the additional device. However, the first transmission lobe (SK1) now has an enlarged first effective transmission opening angle (α1'). The first transmitter (H1) now radiates into the partial space of the free space (FR) of this first transmission lobe (SK1) which has been expanded in this way when emitting with the aid of the additional device.

The second optical transmitter (H2) then also radiates the second radiation lobe (SK2) into the free space (FR) with an additional device. However, the second transmission lobe (SK2) now has an enlarged second effective transmission aperture angle (α2'). The second transmitter (H2) now radiates into the partial space of the free space (FR) of this second transmission lobe (SK2), which has been expanded in this way, when emitting with the aid of the additional device.

With the additional device, the receiver (D) now has a sensitivity lobe (EK) in the free space (FR) with an effective reception opening angle (β′). In this extended reception lobe (EK), radially radiating objects placed there can radiate into the receiver (D) and influence the receiver output signal (S0).

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

This reduces the dead space (NDA) and the area in which no gesture recognition is possible. this is in 2 shown.

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

this is in 3 shown.

In the prior art, a diffuser or a diffusing screen (from the Latin diffusere, 'pour out', 'scatter', 'spread out') is understood to mean an optical component that is used to scatter light. The effects used are typically the diffuse reflection and refraction of light. It is known from light measurement technology to give a detector increased sensitivity for a large solid angle range by means of diffusers. 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 a first transmitter (H1) and a second transmitter (H2), and again a compensation transmitter (K) and a receiver (D). The first transmitter (H1) has a first transmitter wavelength. The second transmitter (H2) has a second transmitter wavelength. The first transmitter wavelength of the emission of the first transmitter (H1) should preferably be in the wavelength range that is visible to a human being.

The amplitude of the emission of the first transmitter (H1) by means of the first transmission signal (S5_1) is preferably modulated 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 transmitter (H1) radiates with a first radiation lobe (SK1) into a free space (FR) in front of the object recognition system. The second transmitter (H2) radiates with a second radiation lobe (SK2) into a free space (FR) in front of the object recognition system.

The receiver (D) receives the light from the first transmitter (H1) reflected by objects in the first radiation lobe (SK1) and the light from the second transmitter (H2) reflected by these objects in the second radiation lobe (SK2) superimposed. The receiver (D) generates a receiver output signal (S0) depending on this radiation. The compensating transmitter (K) also radiates into the receiver (D) via a transmission path (13) and thus also influences the receiver output signal (S0). The influences on the receiver output signal (S0) are preferably linearly dependent on the total amplitude of the superimposed radiation.

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

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

The controller (CTR) now regulates the compensation transmission signal (S3) 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) in such a way that the receiver output signal (S0 ) essentially, ie 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),

A control value of the controller (CTR) typically 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. This measured value can be extracted by a feature and for example be used by a subsequent neural network or HMM recognizer for gesture recognition. These functions are performed 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), serves as a light source for illuminating objects that may be present within the radiation lobe of the first transmitter (H1), in order to make these objects visible to the human eye to make visible. For this purpose, the modulation of the first transmission signal (S5_1), with which the first transmitter (H1) is controlled, must be so fast that the sluggishness of the human eye covers this flickering of the brightness of the first transmitter (H1) and therefore the human does not see this flickering perceives.

The first radiation lobe (SK1) of the first transmitter (H1) and the second radiation lobe of the second transmitter (H2) preferably overlap. This has the advantage that the object can then be illuminated either with the first transmitter (H1) or the second transmitter (H2). In this case, 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 from the second transmitter (H2) can also be red light. By changing the intensity ratio between the envelope amplitude of the light from the first transmitter (H1) and the envelope amplitude of the light from the second transmitter (H2), depending on the type of second transmitter (H2) used, either the brightness of the sensor system that can be perceived by a human being 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 illumination perceived by a person by the first transmitter (H1) and second transmitter (H2) of an object in the overlapping area are changed.

First we consider the case where the second transmitter wavelength of the emission of the second transmitter (H2) is in the wavelength range that is not visible to humans. This second transmitter (h2) is therefore used as a substitute transmitter when the lighting is dimmed down by the user using the first transmitter.

In this case, the controller (CTR) regulates the envelope radiation amplitude of the first transmitter (H1) and the second transmitter 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). (H2). This regulation preferably takes place 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 controller (CTR) thus preferentially increases the envelope radiation amplitude of the second transmitter (H2) if it lowers the envelope radiation amplitude of the first transmitter (H1) as a result of such a user request or system specification, and it lowers the envelope radiation amplitude of the second transmitter (H2) if it reduces the envelope radiation amplitude of the first transmitter (H1) increased.

The controller (CTR) thus preferably readjusts the envelope curve radiation amplitude of the second transmitter (H2) in such a way that when there is a change in the envelope curve radiation amplitude of the first transmitter (H1), the envelope curve radiation amplitude received by the receiver (D) of the total radiation quantities of the radiation from the first transmitter ( H1) 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).

Of course, the system can be supplemented with additional transmitters and receivers. For example, an optical object recognition system can be expanded in such a way that it has a third transmitter (H3). The third optical transmitter (H1) is analogously modulated with a third transmission signal (S5_3). The controller (CTR) then regulates the compensation transmission signal (S3) 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). in such a way that the receiver output signal (S0) essentially, ie 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) and the third transmission signal (S5_2).

The radiation from the third transmitter (H3) is preferably visible. The controller (CTR) can then, for example, using a mixing parameter specified by a user or a higher-level system, 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 radiation amplitude of the first transmitter (H1) and third Control or set the envelope radiation amplitude of the third transmitter (H3). Within the meaning of this document, visible means that the third transmitter wavelength of the emission of the third transmitter (H3) is in the wavelength range that is visible to a human being. The third transmitter (H3) then also radiates with a third radiation lobe (SK3) into 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) preferably overlap in at least one spatial area within the free space in front of the optical object recognition system. This spatial area is referred to below with the term “white space”. The first transmitter wavelength preferably differs from the third transmitter wavelength. For example preferably the color of the first transmitter (H1) perceived by a human differs from the color of the third transmitter (H3). Thus, first of all, the overall brightness of the radiation of the sensor system perceived by a human being is adjusted by means of the non-visible 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 person can be changed. This can happen without impairing the measurement properties of the sensor system 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 (H1) perceived by a human being is chosen to be complementary to the color of the third transmitter (H3) perceived by a human, the permissible value range of the mixing parameter for the intensity mixing then typically includes 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 white space, which makes this object appear white to a human observer.

The controller (CTR) preferably readjusts the envelope curve radiation amplitude of the second transmitter (H2) in such a way that if there is a change in the envelope curve radiation amplitude of the first transmitter (H1) and/or if there is a change in the envelope curve radiation amplitude of the third transmitter (H3), the envelope radiation amplitude of the receiver (D ) Received envelope radiation amplitude of the total amount of radiation reflected by objects from 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) present.

This principle can be extended to a three color light source in general. 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 modulated with a third transmission signal (S5_3). The fourth optical transmitter (H1) is modulated with a fourth transmission signal (S5_3). The controller (CTR) now controls 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, the controller (CTR) executes in such a way that the receiver output signal (S0) essentially, ie 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 longer has any portions of the fourth transmission signal (S5_4). The controller (CTR) can now use 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), to determine the first envelope radiation amplitude of the first transmitter (H1) and the third envelope radiation amplitude of the third transmitter (H3). and controlling the fourth envelope radiation amplitude of the fourth transmitter (H4). 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, the third transmitter wavelength of the emission of the third transmitter (H3) must of course be in the wavelength range visible to a human and the fourth transmitter wavelength of the emission of the fourth transmitter (H4) must be 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 in 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) to a 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, which is supplemented and operated in a manner analogous to the fourth transmitter (H4) and which emits white light.

Back to the example with four transmitters. The third transmitter (H3) preferably radiates with a third radiation lobe (SK3) into the free space (FR) in front of the optical object recognition system and the fourth transmitter (H4) preferably radiates with a fourth radiation lobe (SK4) into 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, which is again referred to below as " white space” designated space area.

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

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

In addition, however, the controller (CTR) readjusts the envelope radiation amplitude of the second transmitter (H2) in such a way that if there is a change in the envelope curve radiation amplitude of the first transmitter (H1) and/or if there is a change in the envelope curve radiation amplitude of the third transmitter (H3) and/or a change in 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) reflected by objects 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). The luminous appearance of the sensor system can thus be dimmed without reducing the measurement properties.

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

Such a system can preferably change parameters of operating functions of a vehicle at least temporarily in connection with gesture recognition as a function of the time profile of said control value of the controller (CTR).

advantage

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

Reference List

α1

first transmission aperture angle;

α1'

effective first transmission aperture angle;

α2

second transmission aperture angle;

α2'

effective second transmission aperture angle;

β

reception opening angle;

β'

effective reception aperture angle;

ctr

controller;

D

Recipient;

DD

optical diffuser, for the radiation that reaches the receiver (D) from the area of free space (FR);

DH1

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

DH2

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

EK

reception lobe;

FR

Free space in front of the sensor system;

G

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

H1

first transmitter;

H2

second transmitter;

H3

third transmitter;

H4

fourth transmitter;

I3

third link;

K

compensation transmitter;

NDA

Non-reception area, also known as dead space;

Z0

receiver output signal;

S3

compensation transmission signal;

S5_1

first transmission signal. The first transmission signal can be the same as or synchronous with the other transmission signals;

S5_2

second transmission signal. The second transmission signal can be the same as or synchronous with the other transmission signals;

S5_3

third transmission signal. The third transmission signal can be the same as or synchronous with the other transmission signals;

S5_4

fourth transmission signal. The fourth transmission signal can be the same as 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 possibly the third transmission lobe (SK3) and possibly the fourth transmission lobe (SK4) and the reception 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 possibly the third transmission lobe (SK3) and possibly the fourth transmission lobe (SK4) and the reception lobe ( EC);

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 possibly the fourth transmission lobe (SK4) and the reception 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 reception lobe (EK);

Claims (11)

Use of an optical object recognition system for illuminating objects that may be present within its radiation lobe in order to make these objects visible to the human eye, the optical object recognition system having - a first transmitter (H1) and - a second transmitter (H2) and - having a compensation transmitter (K) and - is provided with a receiver (D) and - 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 corresponds to the radiation of the first transmitter (H1) is in the wavelength range that is visible to humans - the first transmitter (H1) radiating with a first radiation lobe (SK1) into a free space (FR) in front of the object recognition system and - the second transmitter (H2) with a second radiation lobe (SK2) radiates into a free space (FR) in front of the object recognition system and - the receiver (D) of objects in the first radiation lobe (SK1) receives the light reflected from the first transmitter (H1) and - the receiver (D) receiving the light from the second transmitter (H2) reflected by objects in the second radiation lobe (SK2) - the receiver (D) in Depending on this radiation, a receiver output signal (S0) is generated and - the compensating transmitter (K) radiates into the receiver (D) via a transmission path (13) and influences the receiver output signal (S0) and - the emission of the compensating transmitter (K) in the The transmission link (13) depends on a compensation transmission signal (S3) and - the irradiation from the space of a sensitivity lobe (EK) of the receiver (D) in the receiver (D) and the irradiation of the compensation transmitter (K) in the receiver (D) superimpose summing in the receiver (D) and - wherein the first optical transmitter (H1) with a first transmission signal (S5_1) is modulated and - wherein the second optical transmitter (H2) with a two th transmission signal (S5_2) is modulated 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) the compensation transmission signal (S3) in the Art regulates 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), - with a control value of the controller (CTR) 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 for illuminating objects that may be present within its radiation lobe in order to to make these objects visible to the human eye and - the modulation of the first transmission signal (S5_1) with which the first optis che transmitter (H1) is controlled is so fast that the sluggishness of the human eye covers the flickering of the brightness of the first transmitter (H1) and thus the human being essentially does not perceive this flickering. 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) is in the wavelength range visible to a human being - wherein the first transmitter (H1) radiates with a first radiation lobe (SK1) into a free space (FR) 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 light from the first transmitter (H1) reflected by objects in the first radiation lobe (SK1) and - Wherein the receiver (D) receives the light from the second transmitter (H2) reflected by objects in the second emission lobe (SK2). - wherein the receiver (D) generates a receiver output signal (S0) as a function of these irradiations and - Wherein the compensation transmitter (K) radiates into the receiver (D) via a transmission path (13) and influences the receiver output signal (S0) and - Wherein the emission of the compensation transmitter (K) in the transmission path (13) depends on a compensation transmission signal (S3) and - The irradiation from the space of a sensitivity lobe (EK) of the receiver (D) in the receiver (D) and the irradiation of the compensation transmitter (K) in the receiver (D) are superimposed summing up in the receiver (D) and - wherein the first optical transmitter (H1) is modulated with a first transmission signal (S5_1) and - wherein the second optical transmitter (H2) is modulated with a second transmission signal (S5_2) and - wherein the controller (CTR) regulates the compensation transmission signal (S3) 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) in such a way that the receiver output signal (S0 ) essentially, ie 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 - Wherein the first transmitter (H1) serves as a light source for illuminating objects that may be present within its radiation lobe, in order to make these objects visible to the human eye and - 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) is in the wavelength range that is not visible to a human being, characterized in that - that the controller (CTR) can regulate the envelope 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 - that the controller (CTR) increases the envelope radiation amplitude of the second transmitter (H2) when it decreases the envelope radiation amplitude of the first transmitter (H1), and - that the controller (CTR) decreases the envelope radiation amplitude of the second transmitter (H2) when it increases the envelope radiation amplitude of the first transmitter (H1). Optical object recognition system claim 2 - wherein the controller (CTR) readjusts the envelope radiation amplitude of the second transmitter (H2) in such a way that when there is a change in the envelope radiation amplitude of the first transmitter (H1), the envelope radiation amplitude received by the receiver (D) of the total amounts of radiation reflected by objects of the radiation from the first transmitter (H1 ) 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 claim 3 - with a third transmitter (H3) and - the third optical transmitter (H1) being modulated with a third transmission signal (S5_3) 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) and depending on the third transmission signal (S5_3) regulates the compensation transmission signal (S3) in such a way that the receiver output signal (S0) essentially, ie apart from system noise and control errors, none Shares of the first transmission signal (S5_1) and the second transmission signal (S5_2) and of 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 radiation amplitude of the first transmitter (H1) and third envelope radiation amplitude of the third transmitter (H3) and - wherein the third transmitter wavelength of the radiation of the third transmitter (H3) is in the wavelength range visible to humans and - wherein the third transmitter (H3) with a third radiation lobe (SK3) in the free space (FR ) radiates in front of the optical object recognition system and - whereby the first emission lobe (SK1) and the second emission lobe (SK2) and the third emission lobe (SK3) are located in at least one spatial area within the free space in front of the optical object recognition system, which is referred to below as "white space " designated spatial area, overlap and - whereby the first transmitter wavelength differs from the third transmitter w cubit length differs. Optical object recognition system claim 4 - wherein the permissible range of values of the mixture parameter comprises a value of the mixture parameter which results in an overall irradiation of a white object in white space which makes this object appear white to a human observer. Optical object recognition system claim 4 or 5 - Wherein the controller (CTR) readjusts the envelope radiation amplitude of the second transmitter (H2) in such a way that when there is a change in the envelope curve radiation amplitude of the first transmitter (H1) and/or when there is a change in the envelope curve radiation amplitude of the third transmitter (H3), the receiver (D) Received envelope radiation amplitude of the total amount of radiation reflected by objects from 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 claim 2 - 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 - 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) and - depending on the third transmission signal (S5_3) and - depending on the fourth transmission signal (S5_4) - regulates the compensation transmission signal (S3) in such a way that the receiver output signal (S0) essentially, ie 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) and - the fourth transmission signal (S5_4) 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 radiation amplitude of the first transmitter (H1) and third envelope radiation amplitude of the third transmitter (H3) and fourth envelope radiation amplitude of the fourth transmitter (H4) and - wherein the third transmitter wavelength of the radiation of the third transmitter (H3) is in the wavelength range that is visible to humans and - the fourth transmitter wavelength of the emission of the fourth transmitter (H4) is in the wavelength range that is 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) radiating with a fourth radiation lobe (SK4) into the free space (FR) in front of the optical object recognition system and - the first radiation 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 as "white space", and - where the first transmitter wavelength differs from the third transmitter wavelength and - where the first transmitter wavelength differs from the fourth transmitter wavelength and - wherein the fourth transmitter wavelength differs from the third transmitter wavelength. Optical object recognition system claim 7 - wherein the permissible range of values of the mixture parameter comprises a value of the mixture parameter which results in an overall irradiation of a white object in white space which makes this object appear white to a human observer. Optical object recognition system claim 7 or 8th - 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 enveloped radiation amplitude of the fourth transmitter (H4) the enveloped radiation amplitude received by the receiver (D) the total amounts 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) 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 claims 2 until 9 - wherein the optical object recognition system at least temporarily changes parameters of operating functions of a vehicle depending on the time course of said control value of the controller (CTR). Use of an optical recognition system for illuminating objects that may be present in order to make these objects visible to the human eye, the optical object recognition system, - with a first transmitter (H1) and - with a second transmitter (H2) and - is provided with a receiver (D) and - 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) is in the wavelength range visible to a human being - wherein the first transmitter (H1) radiates with a first radiation lobe (SK1) into a free space (FR) 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 light from the first transmitter (H1) reflected by objects in the first radiation lobe (SK1) and - Wherein the receiver (D) receives the light from the second transmitter (H2) reflected by objects in the second emission lobe (SK2). - wherein the receiver (D) generates a receiver output signal (S0) as a function of these irradiations and - The radiation from the space of a sensitivity lobe (EK) of the receiver (D) in the receiver (D) in the receiver (D) superimpose summing in the receiver (D) and - wherein the first optical transmitter (H1) is modulated with a first transmission signal (S5_1) and - wherein the second optical transmitter (H2) is 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 or another optical property of an object in the free space (FR) generated in front of the optical sensor system and - Wherein the first transmitter (H1) serves as a light source for illuminating objects that may be present within its radiation lobe, in order to make these objects visible to the human eye and - wherein the modulation of the first transmission signal (S5_1), with which the first optical transmitter (H1) is controlled, is so fast that the sluggishness of the human eye covers the flickering of the brightness of the first transmitter (H1) and thus the human of this flickering essentially not perceiving..

Images