EP2457101A2 - Speed sensor - Google Patents
Speed sensorInfo
- 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- Withdrawn
Links
- 230000005855 radiation Effects 0.000 claims abstract description 8
- 238000011156 evaluation Methods 0.000 claims abstract description 3
- 230000003287 optical effect Effects 0.000 claims description 18
- 239000002689 soil Substances 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 239000004973 liquid crystal related substance Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract 1
- 230000005670 electromagnetic radiation Effects 0.000 description 7
- 238000005259 measurement Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009034485 | 2009-07-22 | ||
PCT/EP2010/060418 WO2011009834A2 (en) | 2009-07-22 | 2010-07-19 | Speed sensor |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2457101A2 true EP2457101A2 (en) | 2012-05-30 |
Family
ID=42953750
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10733004A Withdrawn EP2457101A2 (en) | 2009-07-22 | 2010-07-19 | Speed sensor |
Country Status (4)
Country | Link |
---|---|
US (1) | US20120162634A1 (en) |
EP (1) | EP2457101A2 (en) |
DE (1) | DE102010031510A1 (en) |
WO (1) | WO2011009834A2 (en) |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2256850A1 (en) * | 1972-11-20 | 1974-05-30 | Leitz Ernst Gmbh | METHODS OF MEASURING, CONTROLLING AND / OR DISPLAYING THE MOVEMENT OF LAND VEHICLES |
JP3083019B2 (en) * | 1993-03-05 | 2000-09-04 | キヤノン株式会社 | Optical device and speed information detecting device |
DE9311223U1 (en) * | 1993-07-27 | 1993-09-09 | Siemens Ag | Micro sensor with plug connection |
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 (en) * | 2002-03-20 | 2003-10-02 | Hitachi Ltd | Display device, and its driving method |
CN1166914C (en) * | 2002-05-31 | 2004-09-15 | 清华大学 | Frequency-dividing self-mixing feedback-type non-contact He-Ne laser micrometer |
AU2003291221A1 (en) * | 2003-04-02 | 2004-10-25 | Rand Afrikaans University | Optical system and method for monitoring variable in rotating member |
JP3915742B2 (en) * | 2003-06-20 | 2007-05-16 | 株式会社デンソー | Vehicle object recognition device |
JP4337638B2 (en) * | 2003-06-30 | 2009-09-30 | 株式会社日立製作所 | Ground speed measuring device |
US7280200B2 (en) * | 2003-07-18 | 2007-10-09 | Ade Corporation | Detection of a wafer edge using collimated light |
DE10342263A1 (en) * | 2003-09-11 | 2005-04-28 | Infineon Technologies Ag | Optoelectronic component and optoelectronic arrangement with an optoelectronic component |
TWI241042B (en) * | 2004-03-11 | 2005-10-01 | Chen-Lun Hsingchen | A low thermal resistance LED device |
JP3900300B2 (en) * | 2004-03-15 | 2007-04-04 | オムロン株式会社 | Detection end module for photoelectric sensor and photoelectric sensor |
NZ550393A (en) * | 2004-04-05 | 2010-03-26 | Fisher & Paykel Healthcare Ltd | Scope warming device with a white balance calibration feature to callibrate the scope |
US7378721B2 (en) * | 2005-12-05 | 2008-05-27 | Honeywell International Inc. | Chip on lead frame for small package speed sensor |
KR20080085741A (en) * | 2007-03-19 | 2008-09-24 | 한국원자력연구원 | Laser doppler velocity system for changing beam focusing |
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 |
-
2010
- 2010-07-19 WO PCT/EP2010/060418 patent/WO2011009834A2/en active Application Filing
- 2010-07-19 US US13/382,971 patent/US20120162634A1/en not_active Abandoned
- 2010-07-19 DE DE102010031510A patent/DE102010031510A1/en not_active Withdrawn
- 2010-07-19 EP EP10733004A patent/EP2457101A2/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2011009834A2 * |
Also Published As
Publication number | Publication date |
---|---|
WO2011009834A2 (en) | 2011-01-27 |
DE102010031510A1 (en) | 2011-01-27 |
WO2011009834A3 (en) | 2011-08-25 |
US20120162634A1 (en) | 2012-06-28 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20120227 |
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AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: ZUCCARO, THOMAS Inventor name: JOECKEL, WOLFGANG Inventor name: RISCH, STEPHAN Inventor name: SCHMID, BERNHARD Inventor name: HAVERKAMP, MARTIN |
|
DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20170201 |