EP2584874A1 - LED light source with supervision - Google Patents

Abstract

The lamp (100) has several sensors (20) for detecting a sensor signal representing a luminance of an illumination or a light output of the LED light source (10). The deviation of an operational function of the LED light sources is detected based on comparison of the sensor signals. The sensors are arranged in an edge area of a light radiation region. The sensors are provided with photo-diodes and photo-resistor. Independent claims are included for the following: (1) a light management system; and (2) a method for detecting deviation of operational function of LED.

Description

The invention relates to a luminaire with a plurality of LED light sources, which is designed to monitor the operation of the LED light sources.

In general lighting, luminaires with LED light sources are widely used and are preferred for reasons of energy efficiency and easy controllability or regulation of the light output in the new development of luminaires. In order to achieve the light output of known luminaires, it is usually necessary to provide several LED light sources.

Furthermore, one of the biggest benefits of customers of a lighting management system is that lights can be monitored remotely and malfunctions can thus be detected without great personnel or time expenditure. If, for example, an electronic ballast (ECG) or a fluorescent lamp fails, this can be directly and easily recognized by means of the light management system to the user or customer.

In the case of multiple LED light sources for the common light emission, however, it is associated with particular difficulties to detect deviations of an operating function or to categorize which error is present. This is particularly complicated by the fact that LED bulbs can have an increased short-circuit current in case of failure and continue to be subject to an aging process that changes the light output. Particularly difficult, the deviation of an operating function can be determined if the lamp is also designed to control the light output according to a target value.

The invention is therefore based on the object to detect the deviation of an operating function of a lamp with multiple LED bulbs.

According to the invention, a luminaire is provided with a plurality of LED illuminants and a plurality of sensors for detecting a sensor signal. The sensor signal represents a luminance, an illuminance or a luminous flux of the LED bulbs again. According to the invention, a deviation of an operating function is determined or detected on the basis of a comparison of the sensor signals.

In particular, in the case of the deviation from an operating function, a permanent deviation, such as the Failure of one or more of the LED bulbs, the aging of LED bulbs or similar act.

In particular, the luminaire can be designed to categorize the deviation of the operating function, that is to say to distinguish different deviations from one another.

Particularly advantageously, the luminaire has communication means which make the deviation of an operating function to the user of a luminaire recognizable, in particular a category of the deviation of the operating function corresponding to the categorization.

The communication means may include, for example, the connection to a bus system for controlling and regulating the operation of the luminaire.

The luminaire can therefore be connectable to an external control device for controlling the operation of the luminaire, wherein the luminaire sends information to the control device upon detection of a deviation of an operating function and preferably the DALI standard or the extended DALI standard (eDALI) for communication is provided with the control device.

The inventively provided comparison of a plurality of sensor signals allows in particular the mentioned categorization or differentiation of several different deviations or different operating errors.

The comparison preferably takes into account setpoints for individual sensor signals, a deviation of an operating function being detected based on the comparison of the deviation of the individual sensor signals from their respective desired value. The deviation of the sensor signals from their setpoint thus contributes to the categorization, so that, for example, the deviations from their setpoint can serve as input variables of a decision matrix. With the aid of the decision matrix, it is then possible to differentiate between different errors depending on the input variables or can a categorization be carried out. Preferably, each deviation is assigned an operating function, a combination of input variables or a category that can be used for differentiation.

Particularly advantageous may be provided that at least two of the sensors are identical and preferably the sensors in one of the lamp or A housing circumscribed space are arranged. For example, it is thus possible to determine the spatial deviation of sensor signals from a desired value, so that the spatial information contributes to the categorization or to the detection of the deviation from operating functions.

The sensors can be arranged in an edge region of a light emission region of the luminaire, and furthermore the sensors can comprise photodiodes or photoresistors. A particularly simple possibility is thus given to arrange sensors in or on the lamp, which take into account substantially the entire light output of the LED bulbs and additionally provide spatial information about the light output of the LED bulbs available.

In order to improve the spatial deviation information, detection regions of the sensors may be provided which relate to different spatial regions, with the detection regions preferably being able to overlap or to be arranged adjacent overlapping.

For this purpose, at least one sensor can be assigned an optical element which changes the detection range.

Alternatively or in combination, however, it may also be provided that one or more of the sensors in the light path is or are arranged immediately following the LED lighting means, i. while avoiding optical elements, the detection range can be defined.

A particularly advantageous arrangement of the sensors and their associated detection ranges in the luminaire is that the luminaire has one or more planes of symmetry or points of symmetry, wherein the sensors are regularly symmetrically arranged with respect to each of the planes of symmetry or with respect to the point of symmetry.

In one development of the invention, at least three sensors are arranged symmetrically with respect to one another regularly, in particular with respect to a symmetry plane or a symmetry point.

Moreover, it can also be provided that the density of the arrangement of the sensors, that is, the number of sensors per unit area, is substantially constant, wherein the number of sensors in this case preferably comprises more than three sensors. A constant density of the arrangement can likewise for the Be provided detection ranges of the sensors. With the help of these measures is particularly easy to improve the spatial information of the sensors, so that it is also the distinction of different deviations of operating functions can be optimized.

Furthermore, the luminaire preferably has means for shading the sensors from extraneous light or stray light, wherein the means comprise, for example, a light entry surface in an interior of the luminaire circumscribed by the luminaire or a luminaire housing. The sensor signals thus essentially only reflect the light output of the LED lamps.

A further aspect of the invention relates to a light management system having a luminaire having one or more of the features described above, and to a control device for controlling the operation of the luminaire, wherein the control device is designed to receive status messages via an operating function of the LED bulbs.

According to a further aspect of the invention, a method is provided for detecting operational errors with a lamp as described above, wherein the detection of operating errors is limited to time windows. For example, the restriction to a time window that affects a period at night or in the dark, take place. In particular, it is conceivable that the time window comprises only a period of darkness. Furthermore, it can be provided to apply the method for the detection of operating errors of a lamp at regular intervals, for example once in a 24-hour cycle, or once a week or monthly.

According to a further aspect of the invention, a method is provided for detecting an operating error of a luminaire with a luminaire as described above, comprising the steps of: comparing the sensor signals with their respective desired value; Detecting an operating error of the lamp when one or more sensor signals differ from its setpoint by more than a tolerance range and at least one sensor signal is within a tolerance range around its setpoint.

Thus, for example, a failure of one or more of the LED bulbs can be detected, and in particular a combination of deviations in a decision matrix, which are assigned to the failure of a specific or a plurality of specific LED bulbs.

An improvement of the method is conceivable in that with substantially uniform deviation of all sensor signals from their respective desired value or when exceeding all tolerance ranges of the respective target values, the illuminance of the LED lamps is adjusted and preferably adjusted according to the respective setpoint of the sensor signal. In the described manner, for example, an aging process of LED lighting means can be detected, so that thus a further combination of deviations can form a further category or operating function deviation in a decision matrix.

Fig.1

ein erstes Ausführungsbeispiel einer erfindungsgemäßen Leuchte mit mehreren Symmetrieebenen;

Fig.2

ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Leuchte mit einem zentralen Symmetriepunkt;

Fig.3

ein Ausführungsbeispiel einer erfindungsgemäßen Leuchte mit einer Anordnung von Sensoren in konstanter Dichte;

Fig.4

ein Ausführungsbeispiel einer erfindungsgemäßen Leuchte mit Mitteln zur Abschattung der Sensoren gegenüber Fremdlicht; und

Fig.5

ein erfindungsgemäßes Lichtmanagementsystem.

The invention will be explained in more detail with reference to the accompanying drawings, wherein like elements in all representations are provided with the same reference numerals. Show it:

Fig.1

a first embodiment of a lamp according to the invention with a plurality of planes of symmetry;

Fig.2

a further embodiment of a lamp according to the invention with a central point of symmetry;

Figure 3

An embodiment of a lamp according to the invention with an array of sensors in constant density;

Figure 4

An embodiment of a lamp according to the invention with means for shading the sensors against extraneous light; and

Figure 5

an inventive light management system.

FIG. 5 1 shows an exemplary embodiment of a light management system 1000 according to the invention with a luminaire 100 according to the invention and a control device 300 for controlling and monitoring the operation of the luminaire 100.

A particular advantage of light management systems is the ability to remotely monitor operating functions of luminaires. However, if the luminaire includes several LED bulbs, the detection of a fault is particularly difficult for the LED bulbs. For example, in the case of a large number of LED lamps, the failure of individual LEDs may cause the total power consumption of the LED lamps to change only insignificantly, so that the detection of operational errors by changing the power consumption of the LED lamps extremely difficult and therefore unreliable. Typical errors of LED bulbs 20 can also result in a short-circuit current, for example, which makes the failure of individual LED bulbs difficult to detect.

The invention provides a simple remedy for this problem and detects deviations from operating functions of a lamp with multiple LED bulbs.

FIG. 1 shows a lamp 100, with a trough-shaped housing having a light exit opening, which with a in FIG. 4 clearly visible Lichtabstrahlscheibe is completed. In the space circumscribed by the housing and the light exit opening, a plurality of LED lighting means 10 are arranged. The exemplary embodiment shows a luminaire 100 for planar illumination, so that the LED illuminants 10 are advantageously arranged in a field or matrix manner. As will become clear later, a regular arrangement of the LED lamps 10 is associated with particular advantages for the invention.

However, the concept of the invention provides no restriction with respect to the arrangement of the LED light-emitting means 10 and moreover also with respect to the design of the housing, as will become clear in particular from the embodiments described below.

According to the invention, the luminaire 100 has a plurality of sensors 20 which generate a sensor signal which corresponds to a luminance, an illuminance or a luminous flux of at least part of the emitted light LED illuminant 20. However, the correspondence of the sensor signal applies at least to the part of the emitted light 20 which can be assigned to a detection range of the sensor.

In the illustrated embodiment, the sensors 20 are arranged in an edge region of the housing or a light exit opening and follow the LED lighting means 20 directly in the light path. This results in a particularly advantageous arrangement, which allows to detect the entire light output of the lamp 100 with a few sensors 20. In addition, the sensors are arranged regularly, resulting in the later even more precisely described advantages.

It is advantageous that the spatial arrangement of the sensors 20 to each other or to the LED bulbs 10 is known; Thus, the comparison of the sensor signals of several sensors 20 simultaneously includes spatial information about the light emission of the LED bulbs 10. This information is missing, for example, when the sensor signals are detected via a common light guide, which usually requires a light mixture, so that the spatial information about the light emission in this case is changed or lost.

With the aid of the additional spatial information, the invention provides to detect a deviation from an operating function of the luminaire 100 on the basis of the comparison of the sensor signals.

The deviation of an operating function may be a permanent deviation, such as the failure of one or more of the LED lamps 10 or the aging of LED lamps or the like, without user intervention.

However, even smaller deviations in the light output of the LED lamps 10 can be detected, which go beyond slight tolerances, which may be due to production-related deviations in the light output of the LED lamps 10, for example.

The luminaire 100 can in particular be designed to carry out a categorization of the deviation of an operating function, that is to say to distinguish different deviations from one another.

For this purpose, setpoints for individual sensor signals can be provided. The comparison of the deviation of the respective sensor signals from their associated set values contributes to the differentiation of the deviation of the operating function of the luminaire, whereby in particular the spatial information of the deviation can play a special role.

In the embodiment according to FIG. 1 four sensors 20 are provided, which are each arranged in a corner region of the substantially rectangular housing trough. The sensors 20 are essentially identically formed photoresistors (LDRs) which can provide a sensor signal in a particularly cost-effective manner, which corresponds to the luminous flux of the LED luminous means 20 in an assigned spatial area or detection area.

The arrangement of the sensors 20 in the corners of the housing tray follows in the embodiment of the rule of observance of planes of symmetry S of the lamp 100. As in particular from FIG. 1 As can be seen, each of the sensors 20 is arranged in a plane of symmetry S of the luminaire 100.

As already indicated, the arrangement of the LED lighting means 10 can be provided in a field or grid-like manner. This makes it particularly easy to arrange the sensors in a plane of symmetry S of the lamp or it is particularly easy to define a corresponding plane of symmetry.

If only the arrangement of the LED lighting means 10 has a plane of symmetry or one or more points of symmetry, the described embodiments can also be transferred to the points of symmetry of the arrangement of the LED lighting means 10, i. the sensors 20 may be arranged symmetrically to the arrangement of the LED bulbs 10.

Each of the sensors 20 thus detects a light emission of the LED light source 10 or generates a sensor signal which can be assigned to the mutually similar (in the mathematical sense) or dimensionally substantially identical space sections or detection areas. The sensors thus realize similar (mathematical) or essentially identical detection ranges I, II, III and IV to each other.

According to the invention, a deviation of an operating function can be determined from the comparison of the sensor signals.

For this purpose, the following method is provided according to the invention.

In one step of the method, each of the sensor signals is compared with its associated setpoint value; In a subsequent step, an operating error or a deviation from an operating function of the luminaire 100 is detected when at least one sensor signal is within a tolerance range around its desired value and at least one sensor signal deviates from the assigned desired value by more than a tolerance range. The tolerance range can be defined by at least two threshold values of a corresponding sensor signal and include, for example, the setpoint.

For example, in the embodiment of the FIG. 1 one of the sensors 20 detect light from a detection area II, and the luminous flux from the Detection area I to arrange a corresponding sensor signal. The other of the sensors 20 could be correspondingly associated with a respective detection range I, III or IV, wherein the other sensors 20 also generate sensor signals associated with the luminous flux of the respective detection ranges I, III and IV.

If, for example, only the sensor signal associated with the detection range II deviates from a correspondingly assigned desired value by more than a tolerance range or a threshold, then there is a high certainty of an operating error of the LED lighting means 10 and thus a deviation of an operating function of the lamp 100. For example, an LED illuminant 10 may have failed in the detection area II, so that the information results from a comparison with the further sensor signals that one or more of the LED illuminants 10 has failed in the detection area I, ie no dimming of the LED illuminants 10 is generally present. As explained in more detail later, this combination of threshold deviations describes an event or category in a decision matrix which corresponds to a deviation of an operating function or an operating error.

Particularly advantageously, the detection or differentiation of operating errors or deviations from operating functions can be improved by overlapping the detection ranges I, II, II and IV of the sensors 20, as in the exemplary embodiment of FIG FIG. 1 the case is.

The LED luminous means 20 arranged in the detection area II and now failing will cause an insignificant but measurable change in the luminous flux in the adjacent detection areas I, III and IV, so that the sensor signals associated with the detection areas I, III and IV are within the tolerance range of the deviation may be changed by a setpoint.

With the help of the comparison of the deviation of the sensor signals of the adjacent detection areas I, III and IV, the failed LED illuminant 20 can be explicitly determined in the detection area II. For example, the position of the failed LED light-emitting means 20 can be triangulated with the help of the information about the spatial arrangement of the sensors 20 or the position of the detection areas I, II, III and IV and the comparison of the deviations of the sensor signals to each other.

Furthermore, the comparison of the deviation of the sensor signals can take place with the aid of a decision matrix; The decision matrix can then be used to distinguish the deviation from operating functions or to differentiate between Operating errors are used. For this purpose, one or more threshold values or setpoint values can be provided for each sensor signal, for example. Each deviation from an operating function can be assigned a combination of deviations from the threshold values or nominal values, so that the comparison of the deviations of the sensor signals is carried out with the aid of a decision matrix and different operating errors can be distinguished with the aid of the decision matrix.

For this purpose, a single LED lighting means 10 need not necessarily be determined or located explicitly. In order to be able to determine an operating error or a deviation of an operating function, it is sufficient to characterize the normal operation of the luminaire 100 sufficiently with sensor signals. In the case of dimmable LED lighting means 10, for example, it is also conceivable to adapt the threshold values, tolerance ranges or setpoint values for comparison of the sensor signals to a predetermined or actual dimming value. It is also particularly advantageous if the sensor signal setpoint values or the deviation of the sensor signal setpoint values are or are calibrated for a plurality of operating functions. Thus, for example, an abnormal drift in the light output of one or more of the LED bulbs 10 can be detected.

A discernible deviation of an operating function may, for example, also relate to the aging of the LED lighting means 10. In addition to the method described above, the deviation of an operating function of the luminaire 100 can also be ascertained if the sensor signals deviate substantially uniformly from their nominal value or if all the sensor signals lie uniformly outside their respective tolerance ranges. For example, the uniform deviation from a set point may form another category in the decision matrix.

In order to assess the uniformity, preferably with different sensors 20, a correlation function of the sensor signals can be used. The correlation function particularly preferably allows a normalized assessment of the deviation. For example, this may be the determination of the percentage deviation of the sensor signal with respect to the desired value or with respect to a comparison quantity. In addition, temporal correlations are also conceivable, for example the determination of the deviation with respect to a previously determined sensor signal.

If the aging of the LED light-emitting means 10 is detected, it may moreover be provided that the illuminance of the LED light-emitting means 10 is adjusted and is preferably adjusted in accordance with the respective sensor setpoint.

Furthermore, it can also be provided that the detection of a deviation of an operating function is explicitly started when the corresponding operating function of the luminaire is selected. The selection of the operating function can be made, for example, by a user, preferably in the course of normal operation of the lamp.

However, it is also conceivable that the detection of operating errors of the luminaire 100 is limited to time windows. The characterization of the plurality of sensor signals or a calibration is preferably carried out under reduced influence of light which does not originate from the LED lighting means 10. For this purpose, for example, a characterization or calibration during a certain time window, preferably at night or in the dark, be provided.

In the same way, the detection of an operating error of a luminaire 100 or the detection of the deviation of an operating function from a time window at night or in the dark could be limited. Thus, the influence of stray light on the detection of the deviation of an operating function or an operating error can be excluded or reduced, and the time window can be selected preferably in accordance with a calibration time or calibration time window. By this choice, other environmental influences on the light output of the LED bulbs 10 can be considered.

Thus, for example, the detection of an operating error of a lamp 100 preferably regularly, particularly preferably daily, weekly or monthly in a certain time window with respect to the time of day, for example, between 22 clock and 23 clock. This procedure uses the fact that the LED bulbs 10 are relatively reliable, and in case of failure of each of the LED bulbs 10 a functionality of the lamp 100 is still likely to be sufficiently given. Furthermore, in this time window, the influence of scattered light is relatively reliably excluded and it can continue to minimize the disturbance of the inhabitants of the building by checking the LED light-emitting means 10.

Going beyond these measures, one of the sensors 20 can also be designed to evaluate extraneous light to be considered or to measure the luminance, illuminance or luminous flux of extraneous light, so that the Measurement of the deviation of the sensor signals can be determined by extraneous light and is considered accordingly in the detection of the deviation of an operating function of the lamp 100. For this purpose, a corresponding correction of the desired or threshold values of the sensor signals can be provided.

As already indicated, a sufficient characterization of the light output of the LED lighting means 10 contributes to the improvement of the detection of the deviation of an operating function or an operating error. FIG. 2 shows a further embodiment of a lamp 100. The in this case substantially disc-shaped, or circular in cross-section lamp 100 has a central point of symmetry at the intersection of the symmetry planes S shown in dashed lines. The sensors are arranged according to the rule that they have an identical distance to the symmetry point are therefore arranged regularly.

In the exemplary embodiment, the sensors are arranged following a circumferential line of the housing of the luminaire 100 or a peripheral line of a corresponding light exit opening of the housing for the light of the LED illuminant 10. With the aid of this arrangement, the light output of the LED light-emitting means 10 can again be characterized in a particularly favorable manner. The number of sensors 20 particularly preferably exceeds three, since thus a triangulation of the position of individual LED lighting means 10 is made possible. Particularly preferably, even in this rather small number of sensors 20 a regular arrangement is provided.

In the illustrated embodiment, the number of sensors can be chosen relatively small, since the illustrated lamp 100 has a high degree of symmetry. In particular, the lamp 100 is six-fold rotationally symmetric, point-symmetrical and two-fold mirror-symmetrical.

However, when the luminaire 100 is a luminaire of so-called "organic form", i. the luminaire or the arrangement of the LED illuminant 10 has only a few or no symmetry ranges, so a deviating procedure for arranging the sensors may be advantageous.

As from the embodiment of FIG. 3 can be provided, for example, be provided to choose the density of the arrangement of the sensors 20 in a surface portion constant. The support surface of the LED light source 10 may, for example, specify a corresponding area section. Thus, it can be achieved in a simple manner that the light output of the LED lighting means 10 can be sufficiently characterized.

In the exemplary embodiment, the LED lighting means 10 are arranged in the form of a grid or field on the common carrier surface, however, for example, the arrangement may also be provided in the form of a plurality of LED clusters on the common carrier surface. In contrast to previously described embodiments, the arrangement of the LED light-emitting means 10 has only local symmetry, for example limited to LED cluster size or field size. About the support surface, the sensors 20 are arranged uniformly in a grid or field-like arrangement. Furthermore, it may also be in this case to identical sensors 20, which can be formed for example by a particularly cost-effective variant. Particularly preferably, a cost-effective variant can be formed by a photodiode or a photoresistor, so that the density of the arrangement grid can be increased and can preferably be arranged on average between 2 and 9 LEDs between adjacent sensors. In particular, this measure relates to the direct connection line of adjacent diodes or sensors 20.

Particularly preferably, the effect of a constant density of the arrangement of the sensors can also be simulated with the aid of optical elements. For example, one or more of the sensors 20 may be assigned an optical element which changes the detection range of the respective sensor 20.

In particular, this is the representation of the embodiment according to FIG. 4 clear. FIG. 4 shows in cross section a lamp 100 with a trough-shaped housing, as may for example also be provided in the above-described embodiments. The housing has a light exit opening for the light output of the LED illuminant 10, which is closed with a light exit disc. In the region of the housing a plurality of sensors 20 are arranged, which detect the light of the LED lamps 10. The sensors are each assigned different detection ranges I and II, which have a substantially similar surface area with respect to a support surface of the LED light source 10 and a similar (again in the mathematical sense) form. The detection areas are arranged with respect to the support surface in a constant density. This can be realized in particular for three or more sensors 20.

The shape and the surface dimension with respect to a support surface of the LED light source 10 can be changed with the aid of optical elements 25, the individual sensors 20 are changed, so that, for example, the above-described constant density of the detection areas I, II can be realized.

In the exemplary embodiment illustrated, the optical element 25 limits the detection range of the sensors 20 to a solid angle that has an identical surface dimension in cross-section in the plane of the carrier surface of the LED lighting device 10.

The optical elements 25 may preferably comprise one or more lenses, so that, for example, also spatially non-contiguous detection areas can be assigned to individual sensors 20. Furthermore, it is also possible, for example, to provide mirrors or reflectors, but it is particularly advantageous if the spatial information about the light distribution in the respective detection area remains reproducible.

Furthermore, the embodiment describes the FIG. 4 a luminaire 100 with means 50 for shading the sensors 20 with respect to extraneous light, so that the or the sensor signals substantially exclusively reproduce the light output of the LED illuminant. For this purpose, it is provided to provide the light exit window, which simultaneously forms a light entry surface for extraneous light in the lamp 100, with prismatic elevations that limit the entrance angle of extraneous light into the lamp 100. The light exit disc or the light entry surface thus defines a cut-off region for extraneous light entering the luminaire 100, in which one or more of the sensors 20 is or are arranged. The entrance angle is then limited so that no external light hits the sensors 20 directly.

FIG. 5 shows a detail of an embodiment of a light management system 1000 with a lamp 100 according to the invention. The light management system 1000 is configured to control the operation of the lamp 100; For this purpose, a bus system is provided, via which the components of the light management system 1000 are connected.

With the aid of a DALI gateway 200, the luminaire 100 can communicate directly or indirectly over several areas of the bus system. The DALI gateway 200 is preferably designed to receive and forward information relating to an operating state of a luminaire 100, so that this information can be forwarded to a control device 300 of the light management system 1000. The control device 300 is accordingly configured to receive status messages for the operation of the LED lighting means 10. It is also particularly advantageous to provide an eDALI standard, so that the delivered message can, for example, be given a light-specific or light management-specific adaptation.

Furthermore, the light management system 1000 comprises a control device 400 which can be connected to the bus system and controls the operation of the luminaire 100 with the aid of the control device 300, and can display corresponding status information for operating the luminaire or make it identifiable to a user of the light management system. For example, this may be a control computer, or an operator panel of a plant operator, which has or the corresponding display elements.

For this purpose, the luminaire 100 has a connection device to the bus system or via communication means for communication with the bus system, which in particular can also enable wireless communication with the control device.

The control device 300 of the light management system 1000 can now preferably initiate the check of the LED light source 10 of the light 100 in accordance with a predetermined time window. However, the check can also be carried out at the request of the plant operator, for example by means of the control device 400.

For this purpose, the control device 300 sends a corresponding command to the luminaire 100, which will transmit to the luminaire 100 using the DALI standard or particularly advantageously the eDALI standard. To implement the command between different bus areas or different bus standards, the DALI / resp. eDALI Gateway 200 may be provided. The luminaire 100 now evaluates according to the invention, the operating functions of the lamp 100 and sends a status message to the control system 300 regarding the deviations of operating functions of the lamp 100th These can now be detected by the plant operator with the aid of the control device 400, so that a corresponding maintenance of the lamp 100th can be made.

Alternatively or in combination, it may be provided that the luminaire 100 also independently carries out a check of deviations of an operating function. This can preferably take place in a correspondingly provided time window. If the luminaire 100 now detects a deviation of an operating function, it likewise sends a status message to the control system 300 about the deviation of an operating function of the luminaire 100, which can then be identified in the same way to the plant operator.

Thus, it can be stated that the invention defines a luminaire 100 with a plurality of LED illuminants 10, as well as a light management system 1000, which considerably improves the possibilities for detecting a deviation of an operating function of LED luminous means 10 or the luminaire 100. The methods proposed in the context of the invention contribute directly to improving the detection of deviations of an operating function of the luminaire 100.

Furthermore, it should be pointed out that within the scope of the invention it is equally conceivable to combine all the features described above or features shown in the figures in any advantageous manner.

Claims (15)

Light (100) ● with several LED bulbs (10), ● and a plurality of sensors (20) for detecting a sensor signal representing a luminance, an illuminance or a luminous flux of the LED lighting means (10), wherein based on a comparison of the sensor signals, a deviation of an operating function, in particular the failure of one or more LED lighting means (10), is detected. Luminaire according to claim 1,
characterized in that the comparison takes into account setpoints for each individual sensor signals, wherein based on the comparison of the deviation of the individual sensor signals from their respective desired value, a deviation of an operating function is detected. Luminaire according to one of the preceding claims
characterized in that
at least two of the sensors (20) are formed identically and preferably the sensors (20) are arranged in a space circumscribed by the luminaire (100) or a luminaire housing. Luminaire according to one of the preceding claims,
characterized in that
the sensors (20) are arranged in the edge region of a light emission region of the luminaire, and in that the sensors (20) comprise photodiodes or photoresistors (LDR). Luminaire according to claim 4,
characterized in that
Detection areas (I, II) of the sensors (20) relate to different spatial areas and preferably overlap the detection areas (I, II). Luminaire according to one of claims 4 or 5,
characterized in that
at least one sensor (20) is associated with an optical element (25) which changes the detection range. Luminaire according to one of the preceding claims,
characterized in that
several of the sensors (20) in the light path of the LED lighting means (10) are arranged immediately below. Luminaire according to one of the preceding claims,
characterized,
in that the luminaire (100) has one or more planes of symmetry (S) or points of symmetry, wherein the sensors are regularly arranged in particular symmetrically with respect to each of the planes of symmetry (S) or with respect to each point of symmetry. Luminaire according to one of the preceding claims,
characterized,
in that at least three sensors (20) are arranged symmetrically with respect to one another regularly, in particular with respect to a plane of symmetry (S) or a symmetry point, or the density of the arrangement of the sensors, ie the number of sensors (20) per unit area, is substantially constant. Luminaire according to one of the preceding claims,
characterized,
in that the luminaire (100) can be connected to an external control device (300) for controlling the operation of the luminaire (100),
wherein the lamp (100) upon detection of a deviation of an operating function sends information to the control device (300) and
Preferably, the DALI standard or the extended DALI standard (eDALI) is intended for communication. Luminaire according to one of the preceding claims,
characterized,
in that the luminaire (100) has means for shading the sensors (20) from extraneous light or stray light, the means preferably comprising a light entry surface of the luminaire (50). Light Management System (1000)
comprising a luminaire (100) according to one of the preceding claims, and a control device (300) for controlling the operation of the luminaire (100),
wherein the control device (300) is adapted to receive status messages for operation of the LED lighting means (10). Method for detecting an operating error of a luminaire,
with a lamp (100) according to one of claims 1 to 11
characterized in that
the detection of operational errors is limited to time windows, preferably to a time window at night or in the dark. Method for detecting an operating error of a luminaire,
with a lamp according to one of claims 1 to 11,
comprising the steps A) Comparison of the sensor signals with their respective setpoint, B) detection of an operating error of the lamp, if one or more sensor signals differ from its setpoint by more than a tolerance range, and
at least one sensor signal is within a tolerance range around its desired value. Method according to claim 14,
characterized in that with substantially uniform deviation of all sensor signals from their respective setpoint or when exceeding all tolerance ranges of the respective target values, the illuminance of the LED lighting means (10) adjusted and preferably adjusted according to the respective sensor setpoint.

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