EP1894036A1 - Procede pour augmenter la precision d'un capteur a radar doppler - Google Patents

Procede pour augmenter la precision d'un capteur a radar doppler

Info

Publication number
EP1894036A1
EP1894036A1 EP06763706A EP06763706A EP1894036A1 EP 1894036 A1 EP1894036 A1 EP 1894036A1 EP 06763706 A EP06763706 A EP 06763706A EP 06763706 A EP06763706 A EP 06763706A EP 1894036 A1 EP1894036 A1 EP 1894036A1
Authority
EP
European Patent Office
Prior art keywords
transceiver antenna
microwave transceiver
irradiated
doppler
tilting
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Withdrawn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
EP06763706A
Other languages
German (de)
English (en)
Inventor
Hendrik Ibendorf
Chris Kakuschke
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1894036A1 publication Critical patent/EP1894036A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • G01S13/60—Velocity or trajectory determination systems; Sense-of-movement determination systems wherein the transmitter and receiver are mounted on the moving object, e.g. for determining ground speed, drift angle, ground track

Definitions

  • the invention relates to a method for increasing the accuracy of a Doppler radar sensor with a Mikrowellentrans- ceiverantenne for measuring the vehicle speed over ground.
  • the speed-proportional frequency shift of the received microwave ⁇ is compared with the emitted evaluated. If it is emitted obliquely to the ground, the beam angle is included in the calculation. As always a last small area of the substrate be ⁇ must be irradiated, wear different angle units to the total signal. The evaluation of the resulting Frequenzge ⁇ premix is fraught deviation such that a large range also leads to high variations in measurements. Therefore, it is attempted the irradiated area in the direction of movement mög ⁇ lichst narrow to hold. For this, costly antennas with a large aperture have been necessary.
  • the invention has for its object to provide a method for increasing the accuracy of a Doppler radar sensor for driving ⁇ zeug effetsunk.
  • the irradiated background surface is turned out of the direction of travel and adapted in a targeted manner to the isodoppler weighting of the irradiated substrate.
  • a much larger irradiation area fits between two accuracy-limiting isodoppler lines.
  • more scatterers are detected and statistical reliability increases.
  • the correlation length of the signal components of a scattered body as it traverses the irradiation surface increases, which increases the possible accuracy.
  • the aperture ie the antenna width in the less concentrated emission direction, can be further reduced without any losses compared to previous application variants.
  • the necessary area of expensive reducing Hochfrequenzleiterplat ⁇ tenmaterial which determines the antenna cost.
  • the corresponding sensor Due to the smaller antenna projection surface in the direction of travel and the very acute angle of the antenna surface with respect to the incoming air, especially in rain, snow and ver ⁇ dirty spray water, the corresponding sensor is less sensitive to pollution and weather.
  • inexpensive standard microwave transmission antennas can also be used.
  • FIG. 1 shows schematically the contribution of a scattering body to the FIG. 1
  • FIG. 2 shows a typical isodoppler structure and illumination surfaces of differently oriented antennas
  • FIG. 3 shows an isodoppler structure for illustrating the
  • the Doppler spectrum resulting from the frequency-weighted in amplitude and Fre ⁇ power fractions of all illuminated by the antenna scattering body is determined by the angle between the velocity component in the trajectory tion and the velocity component in the direction of the scattering body dependent.
  • y plane can be mapped according to terhin the illumination area of the antenna 2 wei ⁇ .
  • the position of the illumination surface in the isodoppler structure allows for estimations of the Doppler spectrum.
  • Each of the isodoppler lines in Figure 2 represents a frequency in the spectrum. Based on the spatial position of the illumination surface to individual lines can therefore be estimated which frequencies in the spectrum have the largest share.
  • the figure also shows how different Configuratio ⁇ nen the sensor on the footprint on the chart impact. Tilting around the longitudinal axis causes a parallel displacement of the footprint. Turning the entire sensor causes the footprint to move along a circular path. Combinations of both possibilities now allow a precise positioning of the footprint of the antenna in areas that ensure a very narrow Doppler spectrum.
  • FIG. 2 shows an example for this.
  • the antenna module is mounted almost horizontal to the front of the sensor. This is contrary to the common orientation.
  • Each of the isodoppler lines in FIG. 2 represents a frequency in the spectrum. Based on the spatial position of the illumination surface It is thus possible to estimate individual lines which frequencies in the spectrum have the largest share.
  • the advantage of this adaptation is still the relatively simple feasibility. By turning and tilting the module on the sensor front, the illumination spot of the antenna can be positioned anywhere on the ground. This An ⁇ order can be calculated from the underlying angle relationships and so practically realized.
  • an ideal pitch angle is determined from the installation conditions and corresponding to the frequency evaluation method. This results in the basic isodopes of the isodope field. According to the lane conditions an elliptical area as long as possible is placed in the diagram between the isodope pair resulting from the accuracy requirements. Based on the correlation length of the evaluation claims the ellipse Corridor ⁇ optionally yaws. The long axis of symmetry of the ellipse to the antenna posi ⁇ tion is moved parallel. This results in the tilt angle together with the desired height h (FIG. 1) above the ground.
  • the invention is not limited to the above-ge ⁇ above embodiment. On the contrary, a number of variants are conceivable which make use of the features of the invention even if they are of a fundamentally different type.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

L'invention concerne un procédé servant à augmenter la précision d'un capteur à radar Doppler comprenant une antenne émettrice-réceptrice hyperfréquence pour mesurer la vitesse d'un véhicule au sol. Selon ce procédé, l'antenne émettrice-réceptrice hyperfréquence est pivotée et/ou basculée de sorte que la surface souterraine exposée aux rayons est une ellipse allongée qui se situe pratiquement entre deux lignes isodoppler limitant la précision.
EP06763706A 2005-06-24 2006-06-14 Procede pour augmenter la precision d'un capteur a radar doppler Withdrawn EP1894036A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510030296 DE102005030296A1 (de) 2005-06-24 2005-06-24 Verfahren zur Erhöhung der Genauigkeit eines Dopplerradarsensors
PCT/EP2006/063202 WO2006136525A1 (fr) 2005-06-24 2006-06-14 Procede pour augmenter la precision d'un capteur a radar doppler

Publications (1)

Publication Number Publication Date
EP1894036A1 true EP1894036A1 (fr) 2008-03-05

Family

ID=36778172

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06763706A Withdrawn EP1894036A1 (fr) 2005-06-24 2006-06-14 Procede pour augmenter la precision d'un capteur a radar doppler

Country Status (4)

Country Link
EP (1) EP1894036A1 (fr)
CN (1) CN101208615A (fr)
DE (1) DE102005030296A1 (fr)
WO (1) WO2006136525A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101441451B (zh) * 2008-12-16 2013-04-24 中山火炬职业技术学院 厘米段微波传感器控制系统
DE102012219478A1 (de) * 2011-10-24 2013-04-25 Continental Teves Ag & Co. Ohg Sensorsystem zur eigenständigen Bewertung der Integrität seiner Daten
DE102012113020A1 (de) * 2012-12-21 2014-06-26 Deutsche Post Ag Verfahren zum automatischen Kontrollieren eines Fracht befördernden Fahrzeugs sowie ein Kontrollsystem zur Durchführung des Verfahrens
CN106405535B (zh) * 2015-07-31 2021-10-08 株式会社京三制作所 列车速度检测装置及列车速度检测方法
DE102022208311A1 (de) * 2022-08-10 2024-02-15 The Goodyear Tire & Rubber Company Verfahren und Schätzvorrichtung zum Schätzen eines Reibwertpotentials

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB803520A (en) * 1953-09-14 1958-10-29 Gen Precision Lab Inc Improvements in and relating to means for determining the relative speed and direction of travel between the earth's surface and any arbitrary reference on a vehicle
US3271772A (en) * 1962-12-06 1966-09-06 Gen Precision Inc Slot antenna array with side reflectors

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006136525A1 *

Also Published As

Publication number Publication date
CN101208615A (zh) 2008-06-25
WO2006136525A1 (fr) 2006-12-28
DE102005030296A1 (de) 2006-12-28

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