Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
  • G01J1/00—Photometry, e.g. photographic exposure meter
  • G01J1/02—Details
  • G01J1/04—Optical or mechanical part supplementary adjustable parts
  • G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
  • G01J1/0411—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings using focussing or collimating elements, i.e. lenses or mirrors; Aberration correction
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
  • G01J1/00—Photometry, e.g. photographic exposure meter
  • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
  • G01J1/16—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using electric radiation detectors
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
  • G01J1/00—Photometry, e.g. photographic exposure meter
  • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
  • G01J1/16—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using electric radiation detectors
  • G01J1/18—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using electric radiation detectors using comparison with a reference electric value
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
  • G01J1/00—Photometry, e.g. photographic exposure meter
  • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
  • G01J1/20—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle
  • G01J1/22—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using a variable element in the light-path, e.g. filter, polarising means
  • G01J1/24—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using a variable element in the light-path, e.g. filter, polarising means using electric radiation detectors
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
  • G01J1/00—Photometry, e.g. photographic exposure meter
  • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
  • G01J1/20—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle
  • G01J1/28—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source
  • G01J1/30—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source using electric radiation detectors

Definitions

• Lighting system comprising at least one light sensor and a method for adjusting a brightness of a lighting system comprising at least one light sensor
• the invention relates to a light sensor for a
• Lighting device a lighting system comprising at least one light sensor and a method for
• Adjusting a brightness of a lighting system comprising at least one light sensor.
• the light is composed of artificial and natural light and is reflected by a reference surface.
• the resulting luminance is detected by the light sensor and a proportion of artificial lighting illumination regulated so that the luminance remains as constant as possible.
• Luminance range provides sufficient resolution and does not saturate.
• outputted analog values of a photosensitive element e.g. a photo-transistor or a photo-diode or a
• Photoresistor digitized via an analog / digital converter (A / D converter) and fed to an evaluation unit. If a large luminance range is to be covered, a correspondingly high-resolution A / D converter is required.
• the A / D converter is part of a periphery of a microprocessor, which serves as an evaluation unit.
• Standard microprocessors are cost-limited A / D converters with a limited and thus often low
• the light sensors are factory-optimized for a specific work area. Because of a
• Mounting height of the light sensor relative to a lighted and monitored reference surface decreases and very much depends on the remission rate of the reference surface, a light sensor that has been developed for normal room heights of 3 m to 4 m ceiling height, e.g. not used in halls with beam heights of 10 m and more.
• Remission degree corresponds to a ratio of the remitted luminance of the reference surface compared to a pure white surface.
• This has the disadvantage that warehouses but ceiling heights of sometimes significantly more than 4 m have.
• the existing light sensors are not suitable for use in rooms with a distance to an illuminated area or an illuminated area of more than 4 m.
• Another problem arises when a floor is light gray, for example, but has different and possibly changing colors and textures, which can happen, for example, when a shelf is filled or emptied. Different reflections lead to different evaluations of a sensor. Regulations that are used in known light sensors for offices, are also not suitable for such scenarios, as they occur in particular in warehouses.
• the object of the invention is to avoid the above-mentioned disadvantages and in particular a light sensor for a lighting device, a
• Lighting system comprising at least one such
• Brightness of a lighting system comprising at least one light sensor indicate, which is an insert of the
• Sensitivity of the light sensor in dependence on local conditions of the light sensor is adjustable.
• a light sensor with adjustable working range is provided. It is therefore not necessary to adapt a light sensor for different work areas and to configure individually in advance. Instead, such a trained light sensor can be used, wherein at the specific application area a
• a lighting device can in particular be formed from a single light source and a single light sensor. But they can also be realized
• Lamps or lamps to illuminate a room or a surface Lamps or lamps to illuminate a room or a surface.
• the light sensor or the light sensors serve to suit the light source or lamps
• the local conditions of the light sensor are to be understood as meaning, in particular, a relation of the light sensor to an illuminated area or an illuminated area, the illumination of which can be adjusted or regulated via a signal output by the light sensor.
• the local conditions in this case relate in particular to a distance of the light sensor and, where appropriate, of Illuminants of the illumination device to a surface which reflects light in the direction of the light sensor.
• a development is that the light sensor is equipped with an amplifier, the sensitivity of the amplifier depending on the local conditions is adjustable.
• a photosensitive element of the light sensor is a very low and conventional one
• Amplifier be compensated.
• the amplifier provides e.g. at its output a signal ready, an adaptation of the
• Reflection is determinable or changed.
• An embodiment for active measurement consists e.g. in that the light sensor has an active measuring device by means of which the reflection can be determined.
• the active measuring device waves in non-visible
• Input means can be specified.
• the sensitivity of the amplifier can be adjusted using a variable resistor (potentiometer).
• potentiometer potentiometer
• Conditions include a remission degree, a room height and / or a mounting height of the light sensor.
• the light sensor is therefore also in particular
• the light sensor is adjustable by an adjustable optics.
• the sensitivity of the light sensor is adjustable.
• the sensitivity of the above-mentioned amplifier can also be influenced, in that by changing the distance, e.g. at the same time also an adjustable one
• the distance between the lens and the photosensitive element is variable based on the adjustment of the sensitivity of the light sensor. For example, manually or automatically, e.g. by means of a servomotor, the distance between lens and the photosensitive element.
• Sensitivity of the light sensor e.g. based on a setting by the active measuring device.
• a lighting system comprising at least one such
• Lighting is controlled depending on a signal from the light sensor.
• Such a lighting system thus provides coordinated components in the form of the at least one
• Light sensor in different rooms and halls can be used. It is therefore a very variable lighting system.
• the above object is also achieved by a method for adjusting a brightness of a
• Lighting system comprising at least one light sensor, wherein in the method, the sensitivity of the
• Light sensor is adjusted depending on local conditions of the light sensor and wherein in the
• Method is controlled at least one lamp of the lighting system according to the setting of the light sensor.
• this may be a simple control or even a complex control system.
• such a method may require manual adjustment steps, such as
• Activation of at least one lamp is done automatically. Furthermore, a fully automatic system can be realized in which the sensitivity of the light sensor adjusts itself and optionally continuously
• Light sensor to a remote area, in particular a distant hall floor, which is to be illuminated.
• Different versions of a light sensor can be realized, each for different
• Fields of application can be optimized. Exemplified Here are two solutions, with a first concerning an adjustment of the amplification factor. According to a second described solution, the optics of the light sensor are adapted. In particular, a combination of these solutions with each other or with even further solutions can be realized.
• Fig.l schematically components of a lighting system with a light sensor whose sensitivity is adjustable.
• Fig.l shows a light sensor 101, at the base or base 102, a photosensitive element 103 is arranged.
• the base 102 may be, for example, a part of a housing and / or a circuit board or another receptacle for other components.
• the light sensor 101 On the front side of the photosensitive element 103, the light sensor 101 has a lens 105, which may likewise be fixedly mounted on the base 102 or in a housing of the light sensor 101. Front in the lens 105th
• incident light 104 is directed to a focal point 107 by the condensed lens 105 as collimated light 106.
• a distance 121 of the lens 105 from the photosensitive element 103 is preferably selected such that the collimated light 106 covers an active area of the photosensitive element 103 as well as possible.
• Photosensitive member 103 in particular a current or voltage level of the photosensitive member 103 is via corresponding lines an amplifier 109th an exemplary electronics 108 supplied.
• Electronics 108 is preferably also arranged on or in the base 102 of the light sensor 101.
• An output signal of the amplifier 109 is passed to an evaluation unit 110, which evaluates the intensity of the light to a
• Illuminant 111 as a light source
• Lighting device 113 are controlled. from
• Illuminant 111 emitted light 112 falls in the direction of the area which is monitored by the light sensor 101. From an illuminated area or an irradiated space area 114, the light 112 is reflected as the incident light 104 or as a portion thereof. If the intensity of the incident light 104 changes due to aging of the illuminant 111 or a change in environmental conditions, such as e.g. a contamination of the illuminated area, this is detected by the light sensor 101, so that the evaluation unit 110 the
• Lamp operating device 123 controls accordingly.
• the amplifier 109 can be set appropriately. A setting of the
• Amplifier 109 is done for example by means of a manually operated input means 122 in the manner of a
• Potentiometer which is arranged on the light sensor 101.
• the potentiometer for example, the
• the required gain can also be automatic
• an active measuring device 116 connected to the light sensor 101 or in the
• the example shown active measuring device 116 has a
• the waves 117 are reflected at the surface 114 and the portion of the reflection 118 which is transmitted through the lens 105 into the photosensitive
• Element 103 occurs, can be evaluated by the evaluation unit 110.
• the evaluation unit 110 In particular, a differentiation and separate evaluation based on the knowledge of
• the gain optimized for the control function of the sensor can be determined.
• an adjustment of the light sensor 101 is also by a
• Adjustment of an adjustable optics 119 feasible.
• the photosensitive element 103 with solid lines is located at a further distance 121 from the lens 105 than in the dashed line position. A shift in the
• incident light 104 is focused via the converging lens 105.
• the photosensitive element 103 can be displaced along the optical axis 120 of the lens. This can be at the same time set the distance to the focal point 107. For high mounting heights or at low reflectance, the photosensitive element 103 is close to the
• Mounting heights 115 are the lens 105 and the
• Amplification factor of the amplifier 109 and the position of the photosensitive member 103 e.g. about the
• Set input means 122 e.g., trim potentiometer
• Amplification factor of the analog amplifier 109 downstream of the photosensitive element 103 to the local conditions e.g. the mounting height 115 and / or the
• this adjustment can also be made by the adjustable optical system 119 by moving the photosensitive element 103 into or out of the focal point 107 of the lens 105. This can be achieved by changing the distance 121 of the lens 105 to the photosensitive element 103.
• Mechanisms be interconnected. This can e.g.
• the setting can be simplified, for example, by using a knob or the like. carried out, which is provided with two meter scales.
• An inner meter scale is used for setting the mounting height at high Reflection factor, which corresponds to a bright reference surface, and an outer meter scale is used for setting with low reflection factor, which corresponds to a dark reference surface.
• the reference surface is in particular a section of a hall floor to be illuminated or of another area 114 spaced from the illumination device 113 and the light sensor 101.
• the light sensor 101 can independently determine the reflection properties by actively emitting light and measuring the reflected luminance. To differentiate from surrounding
• Lighting or daylight, the actively emitted light can be modulated with a characteristic frequency.
• the active measurement of the reflection properties can additionally be used to prevent interference
• a light sensor 101 By adjusting the amplification factor or the distance 121 to the focal point 107, a light sensor 101 can be offered, which is universal for different mounting heights or surfaces with different
• the reflective surface 114 may be configured as a reference surface or as a reference region. LIST OF REFERENCE NUMBERS

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Spectroscopy & Molecular Physics (AREA)
• Circuit Arrangement For Electric Light Sources In General (AREA)
• Photometry And Measurement Of Optical Pulse Characteristics (AREA)

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Publications (1)

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Citations (10)

Family Cites Families (5)

• 2012
  • 2012-04-03 DE DE201210205475 patent/DE102012205475A1/de not_active Withdrawn
• 2013
  • 2013-03-26 WO PCT/EP2013/056405 patent/WO2013149887A1/fr not_active Ceased

Patent Citations (10)

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