• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a system for detecting a change in a room, in particular the invention comprises a self-learning lighting system which detects presence of a person in a lighted area, the system comprising light sources (2) emitting light, control means (3), controlling the light output of the luminous means (2), measuring means (4) which determine a luminous intensity and an evaluation means (6) which evaluates the luminous intensity determined by the measuring means (4), the evaluating means (6) being designed starting from a determined light intensity at least a first time at which the light source (2) emits no light and a light intensity at least a second time at which the light emitting means (2) emits light to detect a change of an object in the room.
    公开号:AT16100U1
    申请号:TGM104/2015U
    申请日:2015-04-28
    公开日:2019-01-15
    发明作者:
    申请人:Tridonic Gmbh & Co Kg；
    IPC主号:
    专利说明:

    description
    LIGHTING SYSTEM WITH PRESENCE DETECTION OF PERSONS The present invention relates to a system and a method for detecting a change in an object in a room. In particular, the invention includes a self-learning lighting system that detects the presence of a person in an illuminated area.
    For the control of room lighting as well as outdoors outside of buildings, in addition to the use of switches and dimmers, the use of special motion sensors is known. In addition to an advantageous automatic operation of the lamps, motion sensors enable expanded possibilities for saving energy to be used for lighting. However, it is disadvantageous that additional movement in terms of device is required for the movement sensors monitoring the area to be illuminated.
    [0003] DE 20 2010 011 569 U1 discloses a device designed for brightness-dependent lighting. The device shown comprises a means for detecting a brightness which is arranged in an area illuminated by one or more light sources, and means for regulating the brightness of at least one of the light sources. The brightness is regulated at least in part on the brightness detected in the illuminated area and a brightness setpoint. The device shown thus enables dynamic regulation of the lighting as a function of the ambient lighting. The means for detecting the brightness is arranged in the illuminated area or in the area illuminated at least indirectly via reflection.
    [0004] DE 10 2009 056 806 A1 shows a neon sign which shows a circuit board carrying at least one lamp. A brightness sensor is arranged on the circuit board, which measures an ambient brightness. A control device controls a power supply of the at least one illuminant such that a light intensity emitted by the illuminant increases with increasing ambient brightness. The neon sign is thus operated with a brightness adapted to the ambient brightness.
    The prior art shows the measurement of a brightness and the operation of a lamp as a function of a measured brightness, but does not evaluate the measured brightness with regard to information contained in brightness measurements. Although the detection of a reflected light with regard to its brightness is mentioned in the prior art, this brightness is not evaluated.
    It is an object of the present invention to discover a change in a reflective object in a room with as little effort as possible.
    This object is achieved by a system with the features of independent claim 1 and a method with the features of the independent method claim. The dependent claims relate to advantageous developments of the present invention.
    The system according to the invention for determining a change in a room comprises light sources which are suitable for emitting light, control means designed to control the light output of the light source, measuring means suitable for determining a light intensity and an evaluation means which is suitable for the evaluate the light intensity determined and generate a switching signal for the control device based on the evaluation of the measured light intensity. The system according to the invention is characterized in that the evaluation means is designed based on a determined light intensity at at least a first point in time at which the illuminant does not emit light and a determined light intensity at at least a second point in time at which the illuminant emits light To recognize changes in an object in space.
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    Patent Office The configuration according to the invention makes it possible to determine a light intensity (brightness) at least at the first point in time at which the illuminant emits no light, which forms a reference for determining the change in the reflection conditions in a room illuminated by the illuminant. The luminous intensity determined at the first point in time is determined exclusively by portions of the light that are not caused by the illuminant. The light intensity determined by the measuring means at the first time is generated in particular by ambient light, for example natural ambient light and by light sources other than the illuminant of the system according to the invention.
    The determination of a change in an object in the room is now carried out by detecting a change in the reflection conditions in the room by means of a determined light intensity at least a second point in time at which the illuminant emits light to recognize a change in an object in the room. For example, such a change in the reflection conditions in the illuminated room can be caused by a movement of a person in the room. The system according to the invention thus makes it easy to recognize the entry of a person into the room to be illuminated.
    In contrast to the prior art, in which the task of detecting persons is assigned to specialized additional detection devices, such as, for example, motion detectors, this is done according to the invention by a suitable evaluation of the light emitted and reflected by the illuminant of the system and can therefore by means of or multiple photo sensors can be easily captured. It is therefore particularly advantageous if the system according to the invention is part of a lighting system, the measuring means, e.g. Photodiodes assigned to the illuminant and arranged within a housing or on the illuminant. The integrated design of the lighting system with a lamp which is also intended for illuminating the room enables the lighting system according to the invention to be manufactured and assembled particularly easily.
    An advantageous embodiment of the system is characterized in that the control means controls the measuring means. In particular, the control means can be designed to change a light level of the light emitted by the illuminant as a function of the detected change in the object. Based on a detected presence of a person, a light level of the lighting of the room can thus be triggered by the illuminant.
    It is also advantageous if the evaluation means is designed to determine a change in a light component reflected by the object located in the room from a ratio of the determined light intensity at the at least one first point in time and a light intensity at the at least a second point in time to detect the presence of a person in the room.
    In a preferred embodiment of the system according to the invention, the evaluation means is designed to decide, by learning from the determined light intensity at the at least one first point in time, and a light intensity at the at least one second point in time, that a person is present in the room. The system can be learned or trained, for example, in connection with an installation of the system. By training the system, it is also possible to distinguish the change in a position of a person in the room from a lighting situation. A lighting situation can be changed, for example, by pulling a white sheet of paper out of an office table.
    Training the detection of a change in an object and the relevance of a determined change in the reflection conditions can be carried out on the basis of a neural network.
    In the system according to the invention, light comprises ambient light at the at least one first point in time and the light consists of ambient light and reflected light at the at least one second point in time.
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    Patent Office [0017] Furthermore, the system can comprise a measuring device which contains a daylight sensor (ALS Ambient Light Source).
    In a preferred embodiment, the control means is set up to start a burst operation of the illuminant when the daylight sensor determines a light intensity below a daylight threshold and the illuminants are switched to inactive. The burst operation of the illuminant is brief, in order to check the reflection properties of the room at regular intervals during this burst operation.
    It is advantageous if the system comprises an evaluation means, which determines from a determined light intensity at the at least a second point in time a proportion of the determined light that is generated in the room by further illuminants with a defined operating frequency.
    The illuminant can comprise at least one luminous element and at least one further luminous element, the at least one luminous element and the at least one further luminous element each emitting light in a spectrum that can be distinguished from one another. If the evaluation means in each case evaluates the light intensity determined in the spectra which can be distinguished from one another, the spectrum-dependent reflection measurement which is thereby carried out can be used to detect a change in an object in the room or to detect a person with further improved reliability.
    The technical problem is also solved according to the invention by a method for determining a change in a room. For this purpose, the method uses a system comprising, illuminants that emit light, control means that control the light output of the illuminant, measuring means that determine a light intensity, and evaluation means that evaluate the determined light intensity and a switching signal for the control device (3) based on the Generate light intensity evaluation. The method according to the invention is characterized in that, in a first step of the measurement, a light intensity is determined at least at a first point in time at which the illuminant does not emit light, and in a second step a light intensity at at least a second point in time at which the Illuminant emits light determined. Subsequently, in an evaluation step, a change in an object in the room is detected on the basis of the light intensity determined at the at least one first time and the light intensity at the at least a second time.
    Advantageously, the technical problem is solved by a computer program with program code means that can perform all steps according to the method when the program is executed on a computer or a digital signal processor.
    The invention is explained in more detail with reference to the accompanying drawing. It
    showsFigure 1 an overview of an embodiment of a self-learning system for room lighting according to the present invention, Figure 2 Flow diagrams for an exemplary embodiment of a system for room lighting according to the present invention, Figure 3 a timing diagram of an embodiment of a self-learning system for room lighting according to the present invention Fig. 4 an overview of the structure of a system for room lighting according to the present invention by means of a block diagram, Fig. 5 a flowchart of a method for room lighting according to the present invention
    In the figures, elements with the same function are designated with the same reference numerals.
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    Patent Office Fig. 1 gives an overview of an embodiment of a system for room lighting according to the invention. The system shown comprises a lamp 2 arranged in a room 1. In the example shown, the lamp 2 comprises, on the one hand, a plurality of lighting elements 2.1, 2.2 and, on the other hand, a measuring device 4. The lighting devices 2.1, 2.2 can be LEDs or LED modules with a large number of individual ones Include LEDs and be arranged in a common housing with the corresponding control circuits and the measuring means 4. In one exemplary embodiment, the measuring means 4 is a photodiode, which is assigned to the lamp 2. The lamp can be a lamp 2 among several or the sole lamp 2, which illuminates room 1 with artificial light.
    It is particularly advantageous if the measuring means 4 (photodiode, photosensor) with the associated evaluation circuits is part of a ballast and control unit for the lamps 2.1, 2.2 and is, for example, integrated with the latter. The measuring means 4 measures the incident light and generates an output signal depending on the strength of the incident light. If the measuring element 4 is designed as a photodiode, a photocurrent is generated by the incident light depending on the strength of the incident light.
    Further sources that supply the room 1 with light are natural light sources 7 such as the sun and artificial light sources 8 such as street lighting. These natural and additional artificial light sources 7, 8 can also be arranged inside and outside the room 1 his. The artificial light sources 8 also include other illuminants that emit light.
    The light sources 4, 7 and 8 shown on the one hand generate light 10 which strikes the photodiode 4 directly, on the other hand reflected light 9.1, 9.2 which is reflected by objects in the room and as reflected light 9.2. can fall on the photodiode.
    There can also be a further incident light component 11 through the lamps 2.1, 2.2, which generates a corresponding photo current in the photodiode and is thus detected as light.
    [0035] In the following, light and reflection are mentioned. Light is understood as the light radiation in a spectrum as it is emitted by conventional lighting fixtures. In the following, reflection is understood as the reflection of light, that is to say electromagnetic radiation in the optical spectral range, at interfaces.
    An object located in room 1 at least partially reflects incident light regardless of the source of the light. An object or object in the room can be a workstation 12, for example. The strength and direction of the reflected light will depend on the shape and surface of the object and the light source. A person 13 at a work station will therefore show a different reflection behavior with regard to incident light than this applies to the vacant work station 12. The room 1 is therefore characterized by a characteristic reflection pattern depending on the number and the nature of the objects in the room 1.
    A change in an object from a first point in time t1 to a second point in time t2 will lead to a change in the reflection properties of space 1. Such a change in an object is, for example, a movement of a person in the room. In connection with lighting systems, the entry or leaving of a room by a person is of particular importance and manifests itself in a change in the light reflection properties of room 1. A change in an object in room 1 is therefore associated with a change in the reflection pattern.
    The incident and detected light on the measuring means comprises on the one hand usable light components 14, which reaches the measuring means 4 via reflections at interfaces of objects in space 1. On the other hand, the detected light comprises further parasitic light components 15 which come directly from the individual light sources, such as natural light sources 7, artificial light sources 8 and also the illuminants 2.1, 2.2 themselves, and no reflection from objects in space 1 took place. While the usable light components 14
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    Patent Office contain in their intensity and their spectral distribution information about objects in space 1, the parasitic light components 15 carry no such information about objects in space. In order to exclude the influence of the lamps 2.1, 2.2, these can be shaded by the measuring device.
    An exemplary embodiment of a self-learning system for room lighting according to the present invention is explained with reference to a flow chart. It is assumed without restriction of generality that the illuminants
    2.1, 2.2 are designed as LEDs. It is also assumed that the LEDs are controlled via pulse width modulation (PWM operation). If the on and off duration of the pulses is selected appropriately, the human eye only perceives the average brightness of the LED. Thus, the strength of the light emitted by the LED can be controlled linearly with the duty cycle of a control voltage. The keying frequency must be set high enough for this (for example 10 kHz). FIG. 2 shows the time course 16 of the light output of the illuminants 2.1, 2.2. The time t is plotted on the horizontal axis 17. The strength of the light output of the illuminants 2.1, 2.2 (LED) is shown on the vertical axis 19. In a first period 20, the LED emits light of a certain intensity. In a second time period 21, however, the LED is switched off and does not emit any light. This process is repeated for each period 18, the time segments 21, 22 forming a period 18.
    The time profile 17 of the measurement of the measured light intensity of the ambient light sensor 4 is also shown in FIG. 2. The time t is plotted on the horizontal axis 17. The determined light intensity is shown on the vertical axis 23. In a first period 20, the LED emits light of a certain intensity. In a second time period 21, however, the LED is switched off and does not emit any light. During the second period 21, the ambient light sensor 4 will therefore only measure ambient light. In FIG. 2, a disturbance due to incident light is measured in the second period 18 by the ambient light sensor 4. This incident light is emitted, for example, by a further illuminant located in room 1.
    The time course of the ambient light (AmbL) 25 is shown as a continuous time course. The light intensity determined by the ambient light sensor 4 at discrete times is plotted in the direction of the ordinate 26. According to the invention, the ambient light is measured at first points in time at which the illuminant 2 does not emit any light, that is to say in the second time period 21. For a point in time 27, a malfunction caused by a further illuminant in the form of a rejection is taken into account.
    2 shows the time profile 29 of a reflection measure. In the direction of the ordinate 28, a parameter for the value representative of the light reflection for the room 1 at the respective time is shown. At a point in time t1 30, a linear increase from a first lower reflection measure to a second higher reflection measure begins in the time course of the reflection pattern of the room 1. From a time t2 31, the higher value for the reflectance of room 1 is constant again.
    2 shows a determined time profile 33 of the room light intensity 1. In the direction of the ordinate 32, a parameter is shown for the value representative of the determined light intensity for the room 1 at the respective time. The light intensity determined is determined by the ambient light sensor 4 each time the illuminants 2 are switched on. In a temporal section 35, the course of the room luminous intensity 33 is higher than, for example, the determined room luminous intensity at the beginning of the represented temporal course 33 of the room luminous intensity due to an increased proportion of reflected light.
    The time course 34 of the change in the reflectance (ratio between reflected and incident intensity) in space 1, determined by means of the inventive method, is shown in the bottom diagram of FIG. 2. In this case, in the direction of the ordinate 35, a measure of the change in the reflectance of the room 1 is determined, taking into account the light intensity determined, in each case for a point in time during the switching on of the lamps
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    2.1, 2.2 determined by the ambient light sensor 4 and the determined light intensity for a point in time during the switch-off phase of the lamps 2.1, 2.2, as determined by the ambient light sensor 4.
    The luminous intensity determined in each case for a first point in time during the switch-off phase of the illuminants 2 serves as a reference for determining the change in the reflectance of the room 1 from the in each case taking into account the for second points in time during the switch-on phase of the lamps 2.1, 2.2 the light intensities determined by the ambient light sensor 4.
    A typical course of the light intensity over a day is shown in FIG. The time is plotted on the abscissa 17. The light intensity 40 is plotted in the direction of the ordinate 36. 3 additionally shows the presence of one or more people in the room under consideration for the time shown by corresponding bars 41.
    The solid line in FIG. 3 shows the course 42 of the ambient light 42 over the course of a day. The ambient light is essentially shaped by natural ambient light in the course shown, i.e. H. is constantly low for the time of darkness, for example increases linearly to a value of the ambient light which is characteristic of the day. In the course of the illustration, a linear decrease in the light intensity of the ambient light up to the characteristic value of the ambient light characteristic of the night is assumed for the twilight. The course of the ambient light shown is a very simplified representation. In particular, the assumption of a linear transition and constant ambient light levels for day and night do not take into account other light sources such as street lighting, vehicles, shadowing from objects, movement of light sources such as the sun and moon.
    The dashed curve 43 shows the course of the light intensity (light intensity) of the illuminant 2 over the day. The light intensity of the illuminant during the day is controlled by a control unit on the one hand depending on the time. Time-dependent control takes place here, for example, via a timer. Thus, in the example shown, a signal is given by the timer at the beginning of the interval 44, so that a control unit controls the lamps 2.1, 2.2 in such a way that a preset minimum light intensity is generated by the lamps
    2.1, 2.2 is broadcast. Likewise, it is assumed for the interval 45 that the luminous intensity of the illuminants to be emitted is due to a timer signal at a preset time
    2.1, 2.2 is reduced. The intensity of the light is reduced in the interval 45 to a value which is reduced compared to the intensity of daylight and which, on the other hand, is significantly higher than the value of the ambient light intensity at this point in time, as long as people are in the room 1 under consideration.
    A change in one or more people in room 1 can be detected by the lighting system according to the invention and thus the illuminance can be adjusted according to the situation in the room. Therefore, after leaving the room by the last person, the illuminance is further reduced until the preset minimum illuminance is reached. A sequence comparable to interval 45 is shown for interval 46. As soon as the evaluation of the recorded reflection patterns shows that there are no people in room 1, the illuminance of the illuminant 4 is reduced, although the low ambient light intensity would make illuminating the room 1 with the illuminant 4 necessary. A corresponding situation can be seen in the interval 47. It is also clear that the control of the lamps 2.1, 2.2 can take place in such a way that when the decision is made that the last person has left the room, the lamps 2.1,2.2 still emits light for a certain period of time.
    From the course 43 of the light intensity emitted by the lamps 2.1, 2.2 it can be seen that a clear reduction in the energy absorbed by the lamps 2.1, 2.2 can be achieved by linking motion detection according to the present invention. In particular in connection with a time-dependent control and an ambient light sensor 4, savings in energy consumption can be achieved. Beson
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    Patent office ders advantageous is a construction of the lighting system in an integrated form, d. H. the lighting system comprises spatially combined lighting means 2.1, 2.2, measuring means 4, a control means 3 and an evaluation means 5. Such an integrated structure is shown in FIG. 4. Such a construction results in a completely autonomously operating, autonomous lamp 2 with advantageously low energy consumption and at the same time little effort for the connection with further illuminants for synchronization and external control units for controlling the light output in accordance with a need determined by means of additional motion detectors.
    In Fig. 4, a control means 3 is shown that controls the light output of a lamp 2.1, 2.2. The luminaire 2 can comprise a plurality of lamps 2.1, 2.2, 2.3, 2.4, .... A light source is, for example, an LED or an LED module comprising a plurality of LEDs. The luminaire 2 can comprise any form of light-emitting units instead of or in addition to LEDs. Furthermore, the system for determining a change in a room 1 comprises a measuring means 4. The measuring means 4 can contain, for example, an ambient light sensor ALS or a group of sensors that record incident light and output a measurement signal 51 corresponding to the incident light intensity to the control means 3. At the same time, the control means 3 is set up to control the measuring means 4. Such a control of the measuring means 4 is, for example, the time synchronization of the individual measurements which the measuring means 4 carries out and / or the output of the individual light intensity measurements via a measuring synchronization signal 52.
    The control means 3 can also receive a control signal 50 via an external interface. The control signal 50 can, for example, receive time information from an external timer (timer) or external information about a light level to be emitted by the illuminant 2.
    A further signal 53 with measured values of the light intensity obtained by the measuring means 53 is transmitted to the evaluation means 6 by the measuring means 3. The evaluation of the measured values takes place in the evaluation means 6 with the inclusion of an evaluation control signal 54. The evaluation control signal 54 can, for example, contain data on the measurement times of the individual measurements and whether the respective measurement was carried out at a point in time when the illuminant was active (switch-on phase) or during a switch-off phase of the Illuminant 2.
    The evaluation means 6 determined according to the inventive method based on a determined light intensity at at least a first time at which the illuminant 2 emits no light, taking into account at least one measured light intensity at at least a second time at which the illuminant 2 in a switch-on phase Emits light, a change in an object in space. In particular, the evaluation means 6 recognizes whether a person is in the room 1. If the evaluation means 6 decides that a person is in the room 1, the evaluation means 6 can, for example, transmit a corresponding control signal 55 to the control means 3. This control signal can, for example, instruct the control means 3 to control the lighting means 2.1, 2.2 with a corresponding control signal for emitting light with a certain intensity.
    The control signal for the lamps 2.1, 2.2 can set the corresponding light output, for example, by means of a suitable pulse duty factor of a PWM signal.
    The method according to the invention for determining a change in a room 1 in an illumination system will now be explained with reference to FIG. 5.
    First, in a first step S1 of the method according to the invention, the measuring means 4 measures a light intensity of the incident light at at least a first point in time at which the illuminants 2.1, 2.2 emit no light. For an LED as a light source
    2.1, 2.2, which are controlled via a PWM method, the first measurement is carried out during a switch-off phase of the lamps 2.1, 2.2. The measured light intensity is accordingly a light intensity caused by the ambient light.
    In a second step S2, a light intensity is determined at least at a second point in time at which the lamps 2.1, 2.2 emit light. This at least a second
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    In the case of an LED as the illuminant 2.1.2.2, which is controlled via a PWM method, the second measurement is in each case during a switch-on phase of the illuminant
    2.1, 2.2 second measurement made. The measured luminous intensity of the second measurement is accordingly a luminous intensity which is determined by the ambient light which can also be measured during the switch-off phase and the luminous intensity which can be measured by reflected light from the illuminant 2.
    Then, in accordance with the invention, in an evaluation step S3, based on the light intensity determined at the at least one first point in time and the light intensity at the at least one second point in time, a change in an object 12, 13 in space 1 is made on the basis of the change in the reflected light recognized. The measurement carried out in step S1 enables a change to be recognized independently of the use of the ambient light, this step S1 thus represents a timely reference for determining a change in the reflected light in space 1. The evaluation means 6 can start from this detected change in make a classification for reflected light, for example. The result of this classification can be, for example, the decision that at least one person is in the room. The evaluation means 6 is preferably designed such that it can distinguish a change in the position of a person from a change in a basic lighting situation. This distinction can be learned, for example, by training the evaluation means 6.
    Such a distinction can be implemented in an embodiment of the invention in a neural network. Fundamental methods of pattern recognition and statistics which are known per se to the person skilled in the art can be used in the evaluation means 6 to make a decision about a change in an object in the room from the measured values of the light intensity (light intensity).
    For example, longer time intervals in which people in the room perform no or only slight movements can be recognized in one embodiment of the method by taking into account a time lapse of the detected changes in light intensity and trained time patterns in the change in light intensity.
    In one embodiment, a change in the reflection properties of the room 1 can be obtained by referring to the light level determined during an activation phase of the illuminant 2 compared to the light level determined during the switch-off times of the illuminant 2, regardless of an ambient light intensity.
    An advantage of the invention is also based on the fact that a proportional light intensity can be taken into account in the evaluation step S3, which in the first step of measuring S1 for other artificial lamps in the room with a defined operating frequency, in particular further lamps that correspond to the PWM process can be controlled, was determined.
    [0064] In a particularly advantageous embodiment of the method according to the invention, the luminaire is designed such that it can emit light in at least two different spectra. Such training is particularly easy to achieve for illuminants 2.1, 2.2, 2.3, ... which are constructed as LEDs or LED modules. Such a luminaire 2 is a multi-channel LED module, which is designed for at least two LEDs for a different sub-spectrum of the entire light emission spectrum covered by the multi-channel LED module. With a suitable design of the control means 3, the measuring means 4 and the evaluation means 6, the reflection measurement is to be carried out as a light intensity measurement dependent on the spectrum of the determined light intensity. A corresponding evaluation in step S3 enables an even finer gradation of the detection of a change in an object with increased reliability compared to an evaluation over an equally broad overall spectrum, since the reflection properties of the space have a spectral dependence.
    In the exemplary embodiment described above, an embodiment of the system according to the invention for detecting a change on the basis of an illumination system is for
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    Patent office represented a room. However, the invention can also be used outside a room 1 in a vehicle or outdoors.
    The invention has been described above with reference to particularly advantageous embodiments. The description of the embodiments is not exhaustive. In particular, the combination of features of different and separately described exemplary embodiments is as possible as it is advantageous and is expressly included within the scope of the attached patent claims.
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    权利要求:
    Claims (15)
    [1]
    Expectations
    1. System for determining a change in a room, the system comprising illuminants (2), suitable to emit light; Control means (3), suitable for emitting light
    To control the illuminant (2);
    Measuring means (4) suitable for determining a light intensity, an evaluation means (6) suitable for evaluating the determined light intensity and generating a switching signal for the control device (3) based on the evaluation of the light intensity;
    characterized in that the evaluation means (6) is designed based on a determined light intensity at at least a first point in time at which the illuminant (2) emits no light and a light intensity at at least a second point in time at which the illuminant (2) emits light declares to recognize a change in an object in space.
    [2]
    2. System according to claim 1, characterized in that the system is part of a lighting system, the measuring means (4) being assigned to the illuminant (2) and being arranged within or on the housing of the illuminant.
    [3]
    3. System according to one of claims 1 to 2, characterized in that the control means (3) is designed to control the measuring means (4), the control means (3) being designed as a function of the detected change in the object a light level to change the emitted light.
    [4]
    4. System according to one of claims 1 to 3, characterized in that the evaluation means (6) is designed, from a ratio of the determined light intensity at the first point in time, and a light intensity at the second point in time, a change in a portion of light reflected by the object determine to determine a person's presence in the room; and / or that the evaluation means (6) is designed to decide, by learning from the determined light intensity at the at least one first time and a light intensity at the at least a second time, the presence of a person in the room; and / or that the evaluation means (6) is designed to carry out the learning on the basis of a neural network.
    [5]
    5. System according to one of claims 1 to 4, characterized in that light comprises at least one first time ambient light, and the light at least one second time consists of ambient light and reflected light.
    [6]
    6. System according to one of claims 1 to 6, characterized in that the measuring means (4) comprises a daylight sensor; and that the control means (3) is set up to start a burst operation of the illuminant (2) when the daylight sensor determines a light intensity below a daylight threshold and the illuminants are switched inactive; and / or that the evaluation means (6) is set up to determine, from an ascertained light intensity at the at least one second point in time, a proportion of the ascertained light which is generated in the room by further illuminants with a defined operating frequency.
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    [7]
    7. System according to one of claims 1 to 6, characterized in that the lighting means (2) comprises at least one lighting element and at least one further lighting element, wherein the at least one lighting element and the at least one further lighting element are designed, each in a distinguishable light Send out the spectrum, and the evaluation means (6) is set up to evaluate the light intensity determined in the spectra which can be distinguished from one another in order to detect the change in the object.
    [8]
    8. Procedure for detecting a change in a room using a system that includes the system
    Illuminants (2) which emit light;
    Control means (3) which control the light output of the illuminant (2);
    Measuring means (4) which determine a light intensity; and evaluation means (6) which evaluate the determined light intensity and generate a switching signal for the control device (3) based on the evaluation of the light intensity;
    characterized in that in one step a light intensity is determined at at least a first point in time at which the illuminant (2) emits no light;
    in a further step, a light intensity at at least a second point in time at which the illuminant emits light is determined; and in a step of evaluating, a change in an object in the room is recognized on the basis of the light intensity determined at the at least one first time and the light intensity at the at least a second time.
    [9]
    9. Computer program with program code means, characterized in that all steps according to claim 8 can be carried out if the program is executed on a computer or a digital signal processor.
    [10]
    10. Computer program product with program code means stored on a machine-readable data carrier, characterized in that all steps according to claim 8 can be carried out if the program is executed on a computer or a digital signal processor.
    4 sheets of drawings
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    法律状态:
    2020-12-15| MM01| Lapse because of not paying annual fees|Effective date: 20200430 |
    优先权:
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    DE102015200133.4A|DE102015200133A1|2015-01-08|2015-01-08|Lighting system with presence detection of persons|
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