EP2457101A2 - Détecteur de vitesse - Google Patents

Détecteur de vitesse

Info

Publication number
EP2457101A2
EP2457101A2 EP10733004A EP10733004A EP2457101A2 EP 2457101 A2 EP2457101 A2 EP 2457101A2 EP 10733004 A EP10733004 A EP 10733004A EP 10733004 A EP10733004 A EP 10733004A EP 2457101 A2 EP2457101 A2 EP 2457101A2
Authority
EP
European Patent Office
Prior art keywords
sensor
unit
lens
sensor according
housing
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Withdrawn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
EP10733004A
Other languages
German (de)
English (en)
Inventor
Martin Haverkamp
Wolfgang Jöckel
Thomas Zuccaro
Bernhard Schmid
Stephan Risch
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.)
Continental Teves AG and Co OHG
Original Assignee
Continental Teves AG and Co OHG
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 Continental Teves AG and Co OHG filed Critical Continental Teves AG and Co OHG
Publication of EP2457101A2 publication Critical patent/EP2457101A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/02—Housings
    • G01P1/026—Housings for speed measuring devices, e.g. pulse generator

Definitions

  • the invention relates to a sensor for detecting speeds and its use in motor vehicles, in particular as an optical speed sensor.
  • the invention is based, in particular, on the object of proposing a sensor whose detection principle is based on electromagnetic radiation which operates precisely and / or reliably and / or is relatively inexpensive.
  • the speed sensor is preferably designed as a sensor type, which is also referred to as a speed-over-ground sensor.
  • the radiation emitter element preferably emits electromagnetic radiation and the sensor element preferably detects electromagnetic radiation.
  • the lens of the soil deflecting unit or the pre-optical element or the lens of the soil deflecting unit and the pre-optical element are formed as a liquid lens, in particular with an electrically adjustable focal length.
  • the lens of the soil deflector unit or the pre-optical element or the lens of the dirt repellent purity and the pre-optical element have a liquid crystal layer, which can be controlled in particular as an optical shutter or optical shutter or is designed accordingly.
  • the lens of the soil deflector unit or the pre-optical element or the lens of the soil deflector unit and the pre-optical element are formed as discs and do not focus and do not dissipate the electromagnetic radiation or the light.
  • the sensor unit is preferably designed as a surface-mountable component, SMD, "surface-mounted device”.
  • the radiation emitter element is preferably designed as a laser, which is designed in particular such that it operates according to the self-modulating interference principle, SMI, "seif modulation interference.”
  • SMI self-modulating interference principle
  • reflected portions of the emitted laser beam modulate, in particular, the intrinsic laser power, whereby a velocity measurement
  • the sensor element is particularly preferably not separately formed but part of the laser or the laser itself.
  • the sensor element of the sensor unit is preferably integrated in the radiation emitter element, in particular as a photodiode.
  • the sensor housing preferably has an attachment unit for mounting the entire sensor, as well as a plug unit, the contact pins or contact pins are electrically connected to the lead frame.
  • the soil deflector unit preferably comprises a pipe.
  • This tube is expediently fastened to the sensor housing with a mechanically separable and closable closure, in particular a clip closure and / or at least one snap hook.
  • a disk is expediently arranged opposite the lens, so that no
  • This disc is arranged in particular in the region of the attachment to the sensor housing, for example at least in the first third of the tube length.
  • the tube is formed at least 3 times as long, in particular at least 5 times as long, as the diameter of the lens.
  • the sensor unit preferably comprises an electronic self-test device, which has an additional sensor element for this purpose.
  • the sensor is preferably designed such that the sensor unit comprises at least one laser which emits electromagnetic radiation and which reflects and / or diffuses and / or diffracts electromagnetic radiation from a roadway and / or from objects located thereon.
  • the sensor unit comprises at least one laser which emits electromagnetic radiation and which reflects and / or diffuses and / or diffracts electromagnetic radiation from a roadway and / or from objects located thereon.
  • the sensor is preferably integrated in a motor vehicle and aligned so that it detects the roadway or a roadway cutout, in particular in front of the motor vehicle.
  • the sensor preferably comprises a plurality of lasers directed onto the roadway, which are arranged together in the sensor unit, in which different working distances (focusing) are particularly preferably required depending on the application requirements.
  • the lens is suitably by a suitable
  • the postponed lens directs the beam path in the intended direction, focuses it, determines the working distance and at the same time serves as the cover of the sensor housing.
  • the lens and / or the Vorop- tikelement are formed as a liquid lens.
  • a liquid lens is understood to mean, in particular, an optical lens with an electrically variable focal length.
  • an autofocus function and / or an electrically adjustable working distance is particularly preferably implemented. This working distance can z. B. be dynamically adjusted depending on the loading condition of the vehicle. The working distance measurement can done by an additional functionality of the sensor component.
  • the sensor preferably comprises a self-test function.
  • the sensor has, in particular, an electronic self-test device which, for example, can also be integrated into another or general electronic circuit of the sensor.
  • the sensor particularly additionally additionally has an additional sensor element which is designed and arranged such that it detects the radiation attenuation (loss of intensity) in the sensor housing.
  • the at least one laser as part of the sensor unit, expediently detects the change in the beam path for self-test purposes itself.
  • the complete optical beam path including processing electronics is thus checked.
  • the sensor is expediently of modular construction, the sensor unit, the sensor housing and the dirt deflector unit forming prefabricated modules.
  • the mounting of the sensor can be done with a few individual parts while focusing and adjusting the optics
  • the lens of the soil deflecting unit and / or the pre-optic element are preferred as conventional optical elements or optical lenses formed or alternatively preferably as liquid lenses.
  • an embodiment of the sensor housing with press-in contacts is possible, on which a printed circuit board with SMD sensor, which has one or more lasers (SMI), is mechanically fastened and electrically contacted.
  • the fastening unit can alternatively be designed as a locking element.
  • the plug can alternatively be designed as a cable outlet.
  • the invention also relates to the use of the sensor in motor vehicles, in particular as an optical speed sensor for absolute and relatively precise speed measurement in motor vehicles, particularly preferably as a so-called speed-over-ground sensor.
  • FIG. 2 shows an exemplary sensor housing, an exemplary sensor unit and an exemplary lens of the soil deflector unit, as an isolated sensor
  • 3 shows an exemplary housing part for inserting an exemplary leadframe
  • Fig. 4 shows an example sensor without lens, as well
  • Fig. 5 shows an embodiment of a sensor with a
  • the sensor shown by way of example in FIG. 1 comprises a sensor housing 4 with a plug unit 5 and a fastening unit 6, which are integrally connected to the sensor housing 4.
  • the sensor unit is not shown and arranged under optically non-transmissive lens 3 of the soil deflecting unit, said lens 3 transmits electromagnetic radiation longer wavelength.
  • the lens 3 of the soil deflecting unit, the sensor unit 1 and the sensor housing 4 are shown by way of example.
  • sensor housing 4 a leadframe 9 is inserted.
  • Sensor unit 1 is formed, for example, as an SMD component and has a pre-optical element 2, which is designed as a protective screen.
  • the lens 3 is welded to the sensor housing.
  • Sensor unit 1 also includes a radiation emitter element, not visible in this figure, a sensor element and an electronic evaluation circuit.
  • FIG. 3 shows, by way of example, a metal sleeve 10 and a leadframe 9 for mounting in a sensor housing (not shown).
  • the metal sleeve 10 is placed in a fastening integrated unit, in particular injected into this, and is used for solid attachment of the housing at the installation or in the motor vehicle, while the leadframe of contacting between a plug unit and a sensor unit is used.
  • FIG. 4 illustrates a sensor without imaged lens, in which leadframe 9 is injected into sensor housing 4.
  • Sensor unit 1 is formed as an SMD component and in the sensor housing on the
  • the sensor housing 4 includes a rolled metal sleeve 10 for mounting the sensor at the installation by means of a screw connection. Furthermore, the sensor housing includes a plug unit 5 for electrical contacting.
  • Fig. 5 shows an embodiment of the sensor with a tube 7, made of plastic, as part of the soil deflector unit.
  • This tube 7 is secured by means not shown, releasable mechanical means to the sensor housing 4.
  • the length of the tube is at least three times as large as the diameter of the lens 3.
  • Pipe 7 has a disc 8 as a dirt deflector with respect to the lens 3, which is arranged in the first third of the tube.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)

Abstract

L'invention concerne un détecteur pour détecter des vitesses, comportant au moins une unité de détection (1) comprenant un élément rayonnant, un élément de détection, un élément préoptique (2) et un circuit d'évaluation; un boîtier de détecteur (4) comprenant un cadre de montage (9); et une unité anti-salissure comprenant une lentille (3). L'unité de détection (1) est en contact électrique avec le cadre de montage (9) du boîtier de détecteur (4) et la lentille (3) de l'unité anti-salissure ferme le boîtier de détecteur en tant que couvercle.
EP10733004A 2009-07-22 2010-07-19 Détecteur de vitesse Withdrawn EP2457101A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009034485 2009-07-22
PCT/EP2010/060418 WO2011009834A2 (fr) 2009-07-22 2010-07-19 Détecteur de vitesse

Publications (1)

Publication Number Publication Date
EP2457101A2 true EP2457101A2 (fr) 2012-05-30

Family

ID=42953750

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10733004A Withdrawn EP2457101A2 (fr) 2009-07-22 2010-07-19 Détecteur de vitesse

Country Status (4)

Country Link
US (1) US20120162634A1 (fr)
EP (1) EP2457101A2 (fr)
DE (1) DE102010031510A1 (fr)
WO (1) WO2011009834A2 (fr)

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DE2256850A1 (de) * 1972-11-20 1974-05-30 Leitz Ernst Gmbh Verfahren zum messen, regeln und/oder anzeigen der bewegung von landfahrzeugen
JP3083019B2 (ja) * 1993-03-05 2000-09-04 キヤノン株式会社 光学装置及び速度情報検出装置
DE9311223U1 (de) * 1993-07-27 1993-09-09 Siemens AG, 80333 München Mikrosensor mit Steckeranschluß
US5634855A (en) * 1995-06-07 1997-06-03 King; James A. Portable golf club swing speed indicator with downward angled collimated light sensors
US6831268B2 (en) * 2002-01-10 2004-12-14 Gentex Corporation Sensor configuration for substantial spacing from a small aperture
JP2003280600A (ja) * 2002-03-20 2003-10-02 Hitachi Ltd 表示装置およびその駆動方法
CN1166914C (zh) * 2002-05-31 2004-09-15 清华大学 频率分裂氦-氖激光回馈自混合非接触测微仪
DE60308068T2 (de) * 2003-04-02 2007-03-15 University Of Johannesburg Optisches system und verfahren zur variablenüberwachung in einem drehglied
JP3915742B2 (ja) * 2003-06-20 2007-05-16 株式会社デンソー 車両用物体認識装置
JP4337638B2 (ja) * 2003-06-30 2009-09-30 株式会社日立製作所 対地速度計測装置
US7280200B2 (en) * 2003-07-18 2007-10-09 Ade Corporation Detection of a wafer edge using collimated light
DE10342263A1 (de) * 2003-09-11 2005-04-28 Infineon Technologies Ag Optoelektronisches Bauelement und optoelektronische Anordnung mit einem optoelektronischen Bauelement
TWI241042B (en) * 2004-03-11 2005-10-01 Chen-Lun Hsingchen A low thermal resistance LED device
JP3900300B2 (ja) * 2004-03-15 2007-04-04 オムロン株式会社 光電センサ用検出端モジュールおよび光電センサ
WO2005096916A1 (fr) * 2004-04-05 2005-10-20 Fisher & Paykel Healthcare Limited Dispositif de chauffage pour instrument optique
US7378721B2 (en) * 2005-12-05 2008-05-27 Honeywell International Inc. Chip on lead frame for small package speed sensor
KR20080085741A (ko) * 2007-03-19 2008-09-24 한국원자력연구원 초점이 가변되는 광학유속측정장치
US7497124B2 (en) * 2007-04-20 2009-03-03 Delphi Technologies, Inc. Dual pressure sensor apparatus
US7764388B2 (en) * 2007-12-31 2010-07-27 Honeywell International Inc. Autofocus control voltage for indicating package dimensions

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011009834A2 *

Also Published As

Publication number Publication date
WO2011009834A3 (fr) 2011-08-25
US20120162634A1 (en) 2012-06-28
DE102010031510A1 (de) 2011-01-27
WO2011009834A2 (fr) 2011-01-27

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Inventor name: ZUCCARO, THOMAS

Inventor name: JOECKEL, WOLFGANG

Inventor name: RISCH, STEPHAN

Inventor name: SCHMID, BERNHARD

Inventor name: HAVERKAMP, MARTIN

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