DE202008007078U1 - Video detection with PMD sensors - Google Patents

Video detection with PMD sensors

Info

Publication number
DE202008007078U1
DE202008007078U1 DE200820007078 DE202008007078U DE202008007078U1 DE 202008007078 U1 DE202008007078 U1 DE 202008007078U1 DE 200820007078 DE200820007078 DE 200820007078 DE 202008007078 U DE202008007078 U DE 202008007078U DE 202008007078 U1 DE202008007078 U1 DE 202008007078U1
Authority
DE
Germany
Prior art keywords
light
unit
lighting
according
light source
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.)
Expired - Lifetime
Application number
DE200820007078
Other languages
German (de)
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.)
SWARCO TRAFFIC SYSTEMS GMBH, DE
Original Assignee
HUBER SIGNALBAU MUENCHEN
SIGNALBAU HUBER GMBH
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 HUBER SIGNALBAU MUENCHEN, SIGNALBAU HUBER GMBH filed Critical HUBER SIGNALBAU MUENCHEN
Priority to DE200820007078 priority Critical patent/DE202008007078U1/en
Publication of DE202008007078U1 publication Critical patent/DE202008007078U1/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

Classifications

    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/01Detecting movement of traffic to be counted or controlled
    • G08G1/04Detecting movement of traffic to be counted or controlled using optical or ultrasonic detectors
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06Systems determining position data of a target
    • G01S17/08Systems determining position data of a target for measuring distance only
    • G01S17/32Systems determining position data of a target for measuring distance only using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves
    • G01S17/36Systems determining position data of a target for measuring distance only using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves with phase comparison between the received signal and the contemporaneously transmitted signal
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481Constructional features, e.g. arrangements of optical elements
    • G01S7/4814Constructional features, e.g. arrangements of optical elements of transmitters alone

Abstract

Light unit (10), with:
a first light source (11) emitting light having a wavelength in the visible range, and
a second light source (12) which emits light having a wavelength in the non-visible range,
wherein the first lighting means and the second lighting means are integrated in a lighting unit and are separately controllable.

Description

  • The The invention relates to a device for video detection of Road users in the crossing area by means of PMD sensors.
  • Current the video detection for road users takes place via an image analysis using color and black and white cameras, possibly additional IR light sources own for the night illumination. Difficulties in the image analysis by means of cameras, there are shadow formations, overlaps from other vehicles and changing light conditions to recognize and filter out. These difficulties could be solved by means of Stereo cameras and 3D replicas are tempered.
  • in the Automotive sectors will be reinforced cameras with PMD (photo-mixed-detection) sensors used. This PMD sensor is characterized by robustness changing light conditions and insensitivity to foreign and backlight off. The PMD sensor system is based on the principle the time of flight measurement. The emitted, modulated with a frequency Light, is reflected by objects in the detected area and passes with a runtime-dependent phase shift back to a receiving unit with PMD sensors. The PMD sensors will also be modulated with the frequency of the light source and mix the modulation signal with the phase-shifted light signal from the detected area. As a result of the phase shift due to the running time receives pixel by pixel the distance to the objects in the captured area.
  • 4 shows an arrangement for measuring the time of flight with a camera with a PMD sensor 41 that are attached to an object 43 reflected rays of an IR or laser light source 42 detected.
  • Around Such transit time measurement by means of PMD sensors, z. B. at one Traffic lights at an intersection, to enable, must in addition to the light sources of the signal generator of the traffic light nor provided light sources and receivers of the PMD sensor system become. Consequently, at the traffic lights a larger Space required.
  • The publication DE 10 2006 025 020 A1 describes a distance-measuring system or a time-of-flight (TOF) illumination with a lighting means for a transit time measurement system.
  • According to this Reference may be made to the TOF illumination together with a signal or area lighting together in a lighting housing be arranged.
  • These However, document only describes the arrangement of the IR or Laser light source in the same housing as that of the signal generator, so that in case of a conversion of the traffic lights also the Housing would have to be replaced.
  • Of Further, this document describes embodiments, where the TOF lighting and the signal and area lighting have the same lighting means. Such an arrangement is for high-frequency modulating lighting means, such as red light emitting diodes, applicable. However, in such a Case the TOF illumination and the signal or area lighting no longer be controlled independently of each other.
  • It is therefore an object of the invention, the devices according to the To improve the state of the art.
  • According to one aspect of the invention, this object is achieved by a lighting unit, comprising:
    • a first light emitting light having a wavelength in the visible range, and
    • a second light source that emits light with a wavelength in the non-visible range,
    • wherein the first lighting means and the second lighting means are integrated in a lighting unit and are separately controllable.
  • By the now high light output of individual bulbs such. B. light emitting diodes can be the number of required per light unit Bulbs are greatly reduced. There is a possibility with a single light source sufficient light intensity for the lighting unit to produce. The vacated place within the lighting unit can therefore be used for the necessary components for an IR or laser light source receive. The advantage of placement in the light unit is at the indirect lighting achieved thereby to the prevention Direct reflection by fog, rain or snow, as well as the relative the road user correct alignment of the lighting unit in the corresponding lane. Furthermore, the installation can be simplified because the lighting components are not additionally separate must be attached to the mast of a traffic light.
  • According to one Another aspect of the invention is the first light emitting means a light emitting diode and serves to output a light signal and is the second light source an infrared or laser light source of a transit time measurement system.
  • Furthermore, the invention provides a signal generator with at least one of the lighting unit described above. The lighting unit may further comprise a receiving unit for detecting the rays of the at least one second light source reflected by an object, wherein the receiving unit may be a camera with PMD sensors.
  • The The invention further provides a signal generator as described above with a light unit having only the first light source, ready.
  • Furthermore the invention provides a signal generator with at least two light units, as described above, wherein both the individual lighting units as well as the individual bulbs in the light units independently can be controlled from each other.
  • About that In addition, the invention provides a traffic light system with at least one of the aforementioned signal generator ready.
  • Of Furthermore, the invention provides a traffic light system with a first signal generator, as mentioned above, and at least a second signal generator, as mentioned above, ready, wherein the at least second signal generator alternately with or in addition is separately controllable to the first signal generator.
  • By alternating or additional driving of the lighting units in the first signal transmitter and the second signal transmitter leaves improve the illumination of the road and the detection can be made more reliable.
  • The The invention further provides an afore-mentioned traffic light system with a separate receiving unit for detecting the from an object reflected rays of the at least one second light source ready.
  • According to one Another aspect of the invention is the separate receiving unit Camera with PMD sensor.
  • in the Below is a preferred embodiment of Invention described with reference to the accompanying drawings.
  • In the attached drawings:
  • 1 shows a lighting unit according to an embodiment of the invention;
  • 2 shows a signal generator according to an embodiment of the invention;
  • 3 shows a traffic light system according to an embodiment of the invention; and
  • 4 shows an arrangement for light transit time measurement.
  • In 1 denotes reference numeral 10 a lighting unit. The lighting unit 10 includes a first light source 11 and a second light source 12 , The first light source 11 is z. B. a light emitting diode (LED) for emitting light having a wavelength in the visible range. The second light source 12 is a light source for emitting light having a wavelength in the non-visible range, such as an IR or laser light source, for. B. an LED used for the PMD sensor system. How out 1 it can be seen, are the first light source 11 and the second light source 12 together in a lighting unit 10 installed, ie both bulbs are integrated in a lighting unit. However, both light sources can be controlled separately.
  • In addition, in the lighting unit 10 a receiving unit 13 be integrated, which reflects the reflected from an object rays of the at least one second light source 12 detected. The receiving unit 13 may be a camera with a PMD sensor.
  • 1 shows an example of a division of the two bulbs 11 and 12 and the receiving unit 13 within the light unit 10 , The division and number of the two bulbs 11 and 12 and the receiving unit 13 in the lighting unit 10 is not on the in 1 limited case shown. Any number and arrangement of the two bulbs for the light unit is applicable. The receiving unit 13 can also be provided separately, which will be described below with reference to 3 is described.
  • 2 shows a signal generator according to an embodiment of the invention. The in 2 illustrated signal generator 21 comprises a total of three lighting units 22 to 24 , The receiving unit 13 is in 2 not shown. The first two light units 22 and 23 each have the two bulbs 11 and 12 for visible and invisible light, the third light unit 24 only the first light source 11 for visible light. Both the individual lighting units 22 to 24 as well as the individual bulbs 11 and 12 in the light units are independently controllable. That is, to improve illumination of the road with light in the non-visible area, for example, in addition to controlling the bulbs 11 and 12 in the first light unit 22 the bulb 12 the second light unit 23 be controlled. Furthermore, z. B. in a control of the lighting unit 24 that only one bulb 11 for visible light, one or both of the bulbs 12 the lighting units 22 and 23 be controlled.
  • 3 shows a traffic light system according to an embodiment of the invention.
  • In the 3 The traffic light system shown comprises a first signal transmitter 31 and a second signal generator 32 , each having three light units. The traffic light system according to 3 includes a separate camera 33 as a receiving unit for receiving by an object 34 , such as As a vehicle, reflected rays of the second light source in the light units in the signalers. The camera 33 includes a PMD sensor. The camera 33 can be used in addition to or instead of the receiver unit integrated in the light unit 13 to be provided.
  • The separate camera 33 can be installed at any point where it can receive the reflected beams. Advantageously, it is attached to a raised point of the traffic light system with good visibility into the intersection. The bulbs are synchronized with the camera system.
  • According to 3 is shown a traffic light system with two signal transmitters, wherein the signal transmitter 31 has two light units with the IR or laser light sources and the signal generator 32 has only one light unit with the IR or laser light sources. The remaining light units in the signal transmitters include only the visible light emitting diodes without the IR or laser light sources as described above with reference to FIG 2 described.
  • It should be noted, however, that the traffic light system does not affect the in 3 shown arrangement is limited. A traffic light system to which the invention is applicable can have only one or more than two signal transmitters, wherein the signal transmitters can each have any desired number of light units with the IR or laser light sources. In addition, the receiving unit may already be integrated in one or more of the lighting units.
  • ever after necessary light intensity or efficiency The light source may have certain or all light units with an IR or laser light source compatible with the camera system of the illuminated area is synchronized.
  • The individual lamps of the traffic light system can be controlled separately and the bulbs in the signal generator 32 can alternate with the bulbs of the signaler 31 or in addition to the bulbs of the signaler 31 be controlled to improve illumination of the road with light in the non-visible area.
  • The Operation of the described device for detecting objects by means of light transit time measurement corresponds to the operation of the above described PMD sensor system according to the prior of the technique.
  • in view of the above description of embodiment can be seen that made modifications and changes can be without departing from the scope of the invention.
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
  • Cited patent literature
    • - DE 102006025020 A1 [0006]

Claims (12)

  1. Light unit ( 10 ), comprising: a first light source ( 11 ), which emits light having a wavelength in the visible range, and a second illuminant ( 12 ), which emits light having a wavelength in the non-visible range, wherein the first lighting means and the second lighting means are integrated in a lighting unit and are separately controllable.
  2. Light unit ( 10 ) according to claim 1, wherein the first lighting means ( 11 ) is a light emitting diode and is used to output a light signal.
  3. Light unit ( 10 ) according to claim 1 or 2, wherein the second illuminant ( 12 ) is an infrared or laser light source of a transit time measurement system.
  4. Light unit ( 10 ) according to one of claims 1 to 3, further comprising a receiving unit ( 13 ) for detecting the rays of the at least one second luminous means reflected by an object ( 12 ).
  5. Lighting unit according to claim 4, wherein the receiving unit ( 13 ) is a camera with PMD sensor technology.
  6. Signal transmitter ( 21 ) with at least one lighting unit ( 10 ) according to one of claims 1 to 5.
  7. Signal transmitter ( 21 ) according to claim 6, further comprising at least one lighting unit, which only the first lighting means ( 11 ) having.
  8. Signal transmitter ( 21 ) according to claim 6 or 7 with at least two light units ( 10 ), whereby both the individual lighting units and the individual lighting means ( 11 . 12 ) are independently controllable in the light units.
  9. Traffic light system with at least one signal generator ( 21 ) according to one of claims 6 to 8.
  10. Traffic light system according to claim 9 with a first signal transmitter ( 31 ) and at least one second signal generator ( 32 ), wherein the at least second signal generator is alternately controllable with or in addition to the first signal generator.
  11. A traffic light system according to claim 9 or 10, further comprising a separate receiving unit ( 33 ) for capturing the of an object ( 34 ) reflected rays of the at least one second light source ( 12 ).
  12. A traffic light system according to claim 11, wherein the separate receiving unit ( 33 ) is a camera with PMD sensor technology.
DE200820007078 2008-05-26 2008-05-26 Video detection with PMD sensors Expired - Lifetime DE202008007078U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE200820007078 DE202008007078U1 (en) 2008-05-26 2008-05-26 Video detection with PMD sensors

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE200820007078 DE202008007078U1 (en) 2008-05-26 2008-05-26 Video detection with PMD sensors
CZ200920964U CZ19695U1 (en) 2008-05-26 2009-03-10 Video-detection with PMD sensorics
HU0900109U HU3689U (en) 2008-05-26 2009-05-25 Videodetector with pmo sensor
PL388112A PL388112A1 (en) 2008-05-26 2009-05-25 Light unit, signalling device and signal light device

Publications (1)

Publication Number Publication Date
DE202008007078U1 true DE202008007078U1 (en) 2008-09-04

Family

ID=39736668

Family Applications (1)

Application Number Title Priority Date Filing Date
DE200820007078 Expired - Lifetime DE202008007078U1 (en) 2008-05-26 2008-05-26 Video detection with PMD sensors

Country Status (4)

Country Link
CZ (1) CZ19695U1 (en)
DE (1) DE202008007078U1 (en)
HU (1) HU3689U (en)
PL (1) PL388112A1 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009015120A1 (en) * 2009-03-31 2010-10-07 Siemens Aktiengesellschaft Apparatus for signal delivery and image acquisition in road traffic, has video detector partially arranged in transmitter housing, where detector includes exposure device with infrared-LEDs that are mounted with signal-LEDs on circuit board
EP2306426A1 (en) * 2009-10-01 2011-04-06 Kapsch TrafficCom AG Device for detecting vehicles on a traffic surface
WO2011051286A1 (en) * 2009-10-28 2011-05-05 Ifm Electronic Gmbh Camera system
US8242476B2 (en) 2005-12-19 2012-08-14 Leddartech Inc. LED object detection system and method combining complete reflection traces from individual narrow field-of-view channels
US8310655B2 (en) 2007-12-21 2012-11-13 Leddartech Inc. Detection and ranging methods and systems
US8436748B2 (en) 2007-06-18 2013-05-07 Leddartech Inc. Lighting system with traffic management capabilities
US8600656B2 (en) 2007-06-18 2013-12-03 Leddartech Inc. Lighting system with driver assistance capabilities
US8723689B2 (en) 2007-12-21 2014-05-13 Leddartech Inc. Parking management system and method using lighting system
US8842182B2 (en) 2009-12-22 2014-09-23 Leddartech Inc. Active 3D monitoring system for traffic detection
US8908159B2 (en) 2011-05-11 2014-12-09 Leddartech Inc. Multiple-field-of-view scannerless optical rangefinder in high ambient background light
US9235988B2 (en) 2012-03-02 2016-01-12 Leddartech Inc. System and method for multipurpose traffic detection and characterization
US9378640B2 (en) 2011-06-17 2016-06-28 Leddartech Inc. System and method for traffic side detection and characterization
US10488492B2 (en) 2014-09-09 2019-11-26 Leddarttech Inc. Discretization of detection zone

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006025020A1 (en) 2006-05-26 2007-11-29 Pmd Technologies Gmbh Time of flight lighting for illumination to capture three dimensional scenery, has illuminant and is combined with signal lighting and surface lighting

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006025020A1 (en) 2006-05-26 2007-11-29 Pmd Technologies Gmbh Time of flight lighting for illumination to capture three dimensional scenery, has illuminant and is combined with signal lighting and surface lighting

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8242476B2 (en) 2005-12-19 2012-08-14 Leddartech Inc. LED object detection system and method combining complete reflection traces from individual narrow field-of-view channels
US8436748B2 (en) 2007-06-18 2013-05-07 Leddartech Inc. Lighting system with traffic management capabilities
US8600656B2 (en) 2007-06-18 2013-12-03 Leddartech Inc. Lighting system with driver assistance capabilities
US8723689B2 (en) 2007-12-21 2014-05-13 Leddartech Inc. Parking management system and method using lighting system
US8310655B2 (en) 2007-12-21 2012-11-13 Leddartech Inc. Detection and ranging methods and systems
DE102009015120B4 (en) * 2009-03-31 2011-06-16 Siemens Aktiengesellschaft Device for emitting light signals and for recording video images in traffic
DE102009015120A1 (en) * 2009-03-31 2010-10-07 Siemens Aktiengesellschaft Apparatus for signal delivery and image acquisition in road traffic, has video detector partially arranged in transmitter housing, where detector includes exposure device with infrared-LEDs that are mounted with signal-LEDs on circuit board
EP2306426A1 (en) * 2009-10-01 2011-04-06 Kapsch TrafficCom AG Device for detecting vehicles on a traffic surface
WO2011051286A1 (en) * 2009-10-28 2011-05-05 Ifm Electronic Gmbh Camera system
US8842182B2 (en) 2009-12-22 2014-09-23 Leddartech Inc. Active 3D monitoring system for traffic detection
US8908159B2 (en) 2011-05-11 2014-12-09 Leddartech Inc. Multiple-field-of-view scannerless optical rangefinder in high ambient background light
USRE47134E1 (en) 2011-05-11 2018-11-20 Leddartech Inc. Multiple-field-of-view scannerless optical rangefinder in high ambient background light
US9378640B2 (en) 2011-06-17 2016-06-28 Leddartech Inc. System and method for traffic side detection and characterization
US9235988B2 (en) 2012-03-02 2016-01-12 Leddartech Inc. System and method for multipurpose traffic detection and characterization
US10488492B2 (en) 2014-09-09 2019-11-26 Leddarttech Inc. Discretization of detection zone

Also Published As

Publication number Publication date
HU3689U (en) 2009-12-28
HU0900109V0 (en) 2009-07-28
PL388112A1 (en) 2009-12-07
CZ19695U1 (en) 2009-06-17

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Legal Events

Date Code Title Description
R207 Utility model specification

Effective date: 20081009

R081 Change of applicant/patentee

Owner name: SWARCO TRAFFIC SYSTEMS GMBH, DE

Free format text: FORMER OWNER: SIGNALBAU HUBER GMBH, 72669 UNTERENSINGEN, DE

Effective date: 20110202

R150 Term of protection extended to 6 years
R150 Term of protection extended to 6 years

Effective date: 20111025

R157 Lapse of ip right after 6 years
R157 Lapse of ip right after 6 years

Effective date: 20141202