GB2457971A - Light emitting diode street lighting - Google Patents

Light emitting diode street lighting Download PDF

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Publication number
GB2457971A
GB2457971A GB0819933A GB0819933A GB2457971A GB 2457971 A GB2457971 A GB 2457971A GB 0819933 A GB0819933 A GB 0819933A GB 0819933 A GB0819933 A GB 0819933A GB 2457971 A GB2457971 A GB 2457971A
Authority
GB
United Kingdom
Prior art keywords
controller
led
mcpcb
light
luminaire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0819933A
Other versions
GB0819933D0 (en
Inventor
Oliver Blackwell
Alan Parker
Alastair Froggett
Steve Barnett
Ian Barnett
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB0819933D0 publication Critical patent/GB0819933D0/en
Publication of GB2457971A publication Critical patent/GB2457971A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0435—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by remote control means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • F21V23/0457—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors the sensor sensing the operating status of the lighting device, e.g. to detect failure of a light source or to provide feedback to the device
    • F21V29/004—
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • H05B47/19—Controlling the light source by remote control via wireless transmission
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/21—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in parallel
    • H05B47/22—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in parallel with communication between the lamps and a central unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • F21W2111/02—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for roads, paths or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2101/00—Point-like light sources
    • F21Y2101/02—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The Light emitting diode street light assembly includes a multi faceted casting 1, on which a number of thermally controlled metal core printed circuit boards (MCPCB) 2 with integrated high powered LED's are mounted, whose angles have been calculated to provide a wide range of possible light configurations determined by the lumen output and light spread requirements. The intelligent street light also comprises a controller which has the ability to interconnect with an IP camera, a light sensor for dusk/dawn automatic operation, low power radio units, road temperature probes, a passive infrared device and automatic meter reading facilities street lights. A grouping of these assemblies can provide a bearer service in the form of a mesh network. Controller software enables auto sensing of failures in adjacent units, relaying of alarm and statistical data, monitoring on P-N junction temperature and adjustment of current drawn by the LED's.

Description

I
Intelligent LED Street Lighting This present invention relates to a luminaire, casting/housing, light emitting diodes (LEDs) and intelligent controller lamp assembly consisting of a number of metal core printed circuit board (MCPCB) strips of very efficient, high powered LED's and the intelligent control, monitoring, notification and interconnection mechanisms of the assembly.
The Intelligent LED Street Lighting assembly is powered by any combination of either mains power (AC Alternating Current or DC Direct Current), solar panels or wind power.
A battery is used to store the power generated by the solar photovoltaic panel or wind turbine.
The MCPCB's with integrated LED's and circuitry are mounted on a multi faceted luminaire casting whose angles have been calculated to provide a wide range of possible light configurations determined by the lumen output and light spread requirements. The single multi faceted luminaire casting and lamp assembly can be tailored to meet the class requirements of different street lighting standards by populating the MCPCB LED strips on the relevant faces of the casting or by using a variety of optical lenses over the LED's to disperse the light output as required.
Each Intelligent LED Street Light assembly has the ability to send alarm signals to a centralized operations, control and management system on certain failure scenarios (e.g. if an LED or a LED strip fails). This signal can be transmitted by either using Short Messaging Service (SMS) over an integrated GSM modem or by utilizing the integrated wireless radio unit operating in the unlicensed radio frequency band to communicate over Internet Protocol to an Operations and Maintenance Centre (OMC) The invention comprises a Passive Infra Red (PIR) sensor with an operational range of up to 50m and is connected to the intelligent controller. The controller has the ability to step the power available to the MCPCBs commencing with 0% and increasing in increments of 25% of maximum power until 100% of the light output is achieved within a definable time interval (typically 5 seconds). This element of the invention provides a "warm up" facility for the unit operating under cold conditions of less than -5 degrees Celsius. The gradual board warming also helps eliminate condensate from boards prior to the application of full power conditions.
The intelligent LED street light assembly comprises an IP camera in the luminaire that can be interconnected to security or traffic management control systems via IP backhaul.
The IP backhaul is accommodated by the controller connecting to an integrated low power radio unit that transmits and receives in the unlicensed frequency band and using advanced networking.
The light output of the invention is controlled and adjustable by utilizing software running on the controller board. The settings of the intelligent controller can be accessed wirelessly by the low power radio unit and configured and modified via a graphical user interface (GUI) The switching on/off of the LED strips is intelligently controlled by use of a photosensitive device connected to the controller that measures decreasing/increasing light levels at dusk/dawn and will gradually ramp up/down the power to the LED strips. It can alternatively switch on/off more LED strips as darkness falls/abates. This has the effect of reducing overall power consumption.
The controller actively monitors the P-N junction temperature on the MCPCB LED strips. The temperature of the metal core printed circuit board (MCPCB), upon which the LED's are mounted, is monitored using an integrated thermocouple. The MCPCB is designed in such a way that components are only present on one side of the board. This leaves the underside of the LED MCPCB boards with a bare metal finish. Heat from metal underside of the MCPCB is channeled to the luminaire casting via preformed thermal gaskets, cut from an extremely, thermally conductive, carbon compound material. The luminaire casting has been designed to optimise heat flow away from the MCPCBs to the external, cast metal, cooling fins, which are integral to the luminaire casting.
The temperature (heat level) of the MCPCB can be automatically adjusted and controlled with control software. The software adjusts the amount of current drawn by the LED strips so that automatic stepping down/up of the current/power on the MCPCB is achieved. The controller is set with upper and lower temperature thresholds that can be written to the firmware either remotely via the radio unit or by direct connection. When the temperature reaches the pre-set limit, the current automatically reduces in order to lower the temperature on the MCPCB within the light housing. This increases the intelligent LED street light longevity.
Auto sensing of a failure in adjacent intelligent LED streetlights is done by the controller software analyzing measurements of total ambient light output of neighbouring assemblies. This mechanism is applicable when there exists a sequence or line of intelligent LED street lights (e.g. on a motorway) and where one assembly fails completely. The auto sensing intelligence would increase the brightness of the two adjacent assemblies to provide light in the dark area between them.
Each Luminaire is equipped with a radio relay device to deliver alarm and statistical data to a central controller. The radio units require minimal manual configuration, can support 128k encryption mechanisms such as AES, 3DES and are intelligent, forming mesh networks with auto reroute facilities on single point failures. Each mesh network can currently consist of up to 255 devices; future enhancements may increase this beyond 65,000 devices. The throughput of the alarm interface varies between 20kbps and 250kbps depending on the number of channels available. Since the data generated by the LED lights themselves is low, the mesh network can be offered as a bearer service for utility companies to provide Automatic Meter Reading (AMR) facilities to their customers. Support of this feature would require utility meters to be fitted with a suitable radio unit and software development at the maintenance centre to parse, format and display these data.
Luminaires will be fitted with an external power connection and a data interface to support the power and communications requirements for future 4G radio technologies including the deployment of Femtocell products, LTE and WiMax technologies.
Road temperature probes can be interconnected with the intelligent LED street light controller to monitor and report ground temperature.

Claims (14)

  1. Claims 1. The MCPCB's with integrated LED's and circuitry are mounted on a multi faceted luminaire casting whose angles have been calculated to provide a wide range of possible light configurations determined by the lumen output and light spread requirements.
  2. 2. The single, multi faceted luminaire and lamp assembly can be tailored to meet the class requirements of different street lighting standards by populating the MCPCB LED strips on the relevant faces of the casting.
  3. 3. The invention comprises a Passive Infra Red (PIR) sensor with an operational range of up to 50m that is connected to the intelligent controller.
  4. 4. The controller has the ability to step the power available to the LED's on the MCPCBs commencing with 0% and increasing in increments of 25% of maximum power until 100% of the light output is achieved within a definable time interval (typically 5 seconds). This element of the invention provides a "warm up" facility for the unit operating under cold conditions of less than -5 degrees Celsius. The gradual board warming also helps eliminate condensate from boards prior to the application of full power conditions.
  5. 5. The light output of the invention is controlled and adjustable by utilizing software running on the controller board.
  6. 6. The controller actively monitors the P-N junction temperature on the MCPCB LED strips.
  7. 7. The temperature of the metal core printed circuit board (MCPCB), upon which the LED's are mounted, is monitored using an integrated thermocouple.
  8. 8. The MCPCB is designed in such a way that components are only present on one side of the board. This leaves the underside of the LED MCPCB boards with a bare metal finish.
  9. 9. Heat from metal underside of the MCPCB is channeled to the luminaire casting via preformed thermal gaskets, cut from a thermally conductive, carbon compound material.
  10. 10. The luminaire casting has been designed to optimise heat flow away from the MCPCBs to the external, cast metal, cooling fins, which are integral to the luminaire casting.
  11. 11. Auto sensing of a failure in adjacent intelligent LED streetlights is done by the controller software analyzing measurements of total ambient light output of neighbouring assemblies.
  12. 12. Each luminaire and controller assembly is equipped with a radio relay device to deliver alarm and statistical data to a central controller.
  13. 13. The mesh network provided by a grouping of intelligent LED street lights, using the same controller circuitry, can be offered as a bearer service for utility companies to provide Automatic Meter Reading (AMR) facilities to their customers.
  14. 14. Road temperature probes can be interconnected with the intelligent LED street light controller to monitor and report ground temperature.
GB0819933A 2008-02-29 2008-10-30 Light emitting diode street lighting Withdrawn GB2457971A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB0803769.9A GB0803769D0 (en) 2008-02-29 2008-02-29 Intelligent LED street lighting

Publications (2)

Publication Number Publication Date
GB0819933D0 GB0819933D0 (en) 2008-12-10
GB2457971A true GB2457971A (en) 2009-09-02

Family

ID=39315720

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GBGB0803769.9A Ceased GB0803769D0 (en) 2008-02-29 2008-02-29 Intelligent LED street lighting
GB0819933A Withdrawn GB2457971A (en) 2008-02-29 2008-10-30 Light emitting diode street lighting

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB0803769.9A Ceased GB0803769D0 (en) 2008-02-29 2008-02-29 Intelligent LED street lighting

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011154756A3 (en) * 2010-06-09 2012-03-29 Wemont Kft. Method for constructing a lighting device with discrete light sources and thus obtained lighting device
FR2975461A1 (en) * 2011-05-20 2012-11-23 Daniel Greff Lighting system for lighting e.g. roadways, has lenses and LED bars mounted on radiator fin to provide complex combination for generation of homogeneous light beams, and camera block detecting movement in system and operating image sensor
EP2558777A2 (en) * 2010-04-16 2013-02-20 Sunovia Energy Technologies Inc. Solid state outdoor overhead lamp assembly
WO2013025867A1 (en) * 2011-08-17 2013-02-21 G. Albert Hreish Trust Combination lamp and wireless network access system
DE102011112285A1 (en) 2011-09-05 2013-03-07 Schott Ag Optical device for use as e.g. illumination device and for illuminating e.g. road sign, has lenses arranged in small distance to surface of light sources, where one of lenses focuses light in direction and forms light on defined geometry
CN104728809A (en) * 2015-03-25 2015-06-24 句容市万福达工艺品厂 Passive cooling structure design of automobile LED headlamp

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000036336A1 (en) * 1998-12-17 2000-06-22 Koninklijke Philips Electronics N.V. Light engine
CN2575419Y (en) * 2002-09-26 2003-09-24 庄佳璋 Energy-saving illuminating lamp
JP2004200102A (en) * 2002-12-20 2004-07-15 Kankyo Shomei:Kk Exterior illumination fixture by white light emitting diode
WO2006119700A1 (en) * 2005-05-09 2006-11-16 Sze Keun Chan Solar powered led street lamp with automatic light control
CN1995808A (en) * 2006-12-26 2007-07-11 秦文红 Partitioned LED projection illumination method
JP2007242258A (en) * 2006-03-06 2007-09-20 Iwasaki Electric Co Ltd Lighting system
CN101093063A (en) * 2007-07-11 2007-12-26 宁波安迪光电科技有限公司 Highpower LED street lamp
CN201014327Y (en) * 2007-05-15 2008-01-30 宁波燎原工业股份有限公司 LED road lamp bulb holder

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000036336A1 (en) * 1998-12-17 2000-06-22 Koninklijke Philips Electronics N.V. Light engine
CN2575419Y (en) * 2002-09-26 2003-09-24 庄佳璋 Energy-saving illuminating lamp
JP2004200102A (en) * 2002-12-20 2004-07-15 Kankyo Shomei:Kk Exterior illumination fixture by white light emitting diode
WO2006119700A1 (en) * 2005-05-09 2006-11-16 Sze Keun Chan Solar powered led street lamp with automatic light control
EP2017525A1 (en) * 2005-05-09 2009-01-21 Sze Keun Chan Solar powered led street lamp with automatic light control
JP2007242258A (en) * 2006-03-06 2007-09-20 Iwasaki Electric Co Ltd Lighting system
CN1995808A (en) * 2006-12-26 2007-07-11 秦文红 Partitioned LED projection illumination method
CN201014327Y (en) * 2007-05-15 2008-01-30 宁波燎原工业股份有限公司 LED road lamp bulb holder
CN101093063A (en) * 2007-07-11 2007-12-26 宁波安迪光电科技有限公司 Highpower LED street lamp
EP2014970A1 (en) * 2007-07-11 2009-01-14 Ningbo Andy Optoelectronic Co., Ltd. High-power light emitting diode (LED) street lamp

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2558777A2 (en) * 2010-04-16 2013-02-20 Sunovia Energy Technologies Inc. Solid state outdoor overhead lamp assembly
EP2558777A4 (en) * 2010-04-16 2014-02-19 Sunovia Energy Technologies Inc Solid state outdoor overhead lamp assembly
US8783906B2 (en) 2010-04-16 2014-07-22 Evolucia, Inc. Solid state outdoor overhead lamp assembly
WO2011154756A3 (en) * 2010-06-09 2012-03-29 Wemont Kft. Method for constructing a lighting device with discrete light sources and thus obtained lighting device
FR2975461A1 (en) * 2011-05-20 2012-11-23 Daniel Greff Lighting system for lighting e.g. roadways, has lenses and LED bars mounted on radiator fin to provide complex combination for generation of homogeneous light beams, and camera block detecting movement in system and operating image sensor
WO2013025867A1 (en) * 2011-08-17 2013-02-21 G. Albert Hreish Trust Combination lamp and wireless network access system
DE102011112285A1 (en) 2011-09-05 2013-03-07 Schott Ag Optical device for use as e.g. illumination device and for illuminating e.g. road sign, has lenses arranged in small distance to surface of light sources, where one of lenses focuses light in direction and forms light on defined geometry
CN104728809A (en) * 2015-03-25 2015-06-24 句容市万福达工艺品厂 Passive cooling structure design of automobile LED headlamp

Also Published As

Publication number Publication date
GB0803769D0 (en) 2008-04-09
GB0819933D0 (en) 2008-12-10

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