EP3625575A1 - Kalibration von fahrzeugsensoren - Google Patents
Kalibration von fahrzeugsensorenInfo
- Publication number
- EP3625575A1 EP3625575A1 EP18750348.7A EP18750348A EP3625575A1 EP 3625575 A1 EP3625575 A1 EP 3625575A1 EP 18750348 A EP18750348 A EP 18750348A EP 3625575 A1 EP3625575 A1 EP 3625575A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- calibration
- measured values
- rail vehicle
- filter
- state variable
- 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- Withdrawn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
- 238000000034 method Methods 0.000 claims abstract description 39
- 239000011159 matrix material Substances 0.000 claims description 12
- 238000004590 computer program Methods 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 9
- 238000001914 filtration Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229940072033 potash Drugs 0.000 description 2
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- 238000000342 Monte Carlo simulation Methods 0.000 description 1
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- 238000007689 inspection Methods 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
- G01P21/02—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
Definitions
- the invention relates to a method for self-calibration of vehicle sensors. Furthermore, the invention relates to a calibration device. Moreover, the invention relates to a rail vehicle.
- Rail vehicles need exact sensor data and odometric data in order to operate safely.
- Rail vehicles rely on a variety of on-board sensors, such as encoders, Doppler radar, GPS and Balise detectors, to determine their position and speed.
- the odometric data is only correct if the sensor used was precisely calib ⁇ riert. Often errors occur during such a calibration. Such errors can be directly due to errors in the calibration process or caused by a drifting process that begins after the calibration. In this way, the readings become inaccurate and unreliable.
- measured values are recorded on the basis of sensor data of the vehicle sensors.
- an optimal filter is applied to the measured values.
- the optimum filter is to be understood as a filter which generates an estimated value, whereby an uncertainty of the estimated value, which is determined on the basis of uncertain measured values, is minimized.
- a linearized optimal filter such as a linearized Kalman filter can be used.
- Such linearized matched filter includes a one previous value of a state variable line- Aryanised state transition model and / or Beobachtungsmo ⁇ dell.
- nonlinear filters such as Unscented Kalman filters or so-called particle filters based on stochastic sequential Monte Carlo methods, may also be used.
- the calibration means according to the invention has a ⁇ Since tenempfangsaku for detecting measured values on the basis of sensor data from the vehicle sensors.
- Part of the calibration device according to the invention is also a filter unit for applying an optimum filter to the measured values.
- the filters ⁇ unit is also used to determine an updated potash brationswerts a Kalibrationsucc as an updated value of a state variable of the matched filter.
- the inventive Calibration device shares the advantages of erfindungsge ⁇ MAESSEN method for self-calibration of vehicle sensors of a rail vehicle.
- the rail vehicle according to the invention has the erfindungsge ⁇ Permitted calibration device.
- the time ⁇ estimating device according to the invention shares the advantages of the calibration device according to the invention.
- Some components of the calibration device according to the invention can be formed predominantly in the form of software components. This concerns in particular parts of the filter unit. In principle, however, this component can also be partially realized, in particular when it comes to particularly fast calculations, in the form of software-supported hardware, for example FPGAs or the like.
- the required interfaces for example, if it is only about a transfer of data from other software components, be designed as software interfaces. However, they can also be configured as hardware-based interfaces, which are controlled by suitable software.
- a largely software-based implementation has the advantage that already existing in a rail vehicle computer systems can be retrofitted in a simple way by a software update to work on the inventive way.
- the object is also achieved by a corresponding computer program product with a computer program, which is directly in a storage device ei ⁇ nes such a computer system can be loaded, ⁇ lead with Programmabschnit ⁇ th order for For all steps of the inventive method when the computer program in the computer system is performed.
- Such a computer program product in addition to the computer ⁇ program optionally additional components, such as a documentation and / or additional components, also Hardware components, such as hardware keys (dongles, etc.) for using the software include.
- a computer-readable medium for example a memory stick, a hard disk or another portable or permanently installed data carrier can be used, on which the computer program readable and executable by a computer unit are stored.
- the computer unit may be for example a purpose or more cooperating micropro ⁇ processors or the like.
- the state variable comprises a vector variable.
- a state variable ⁇ includes as components both a calibration size as well as further processed information about the technical and / or dynamic state of a vehicle.
- the measured data or sensor data can be generated by odometry sensors and odometry data can be determined as measured values.
- the measurement of the state quantity values can a rotational frequency of a rotary encoder of a tachometer include.
- other speed measurement methods may be used with other metrics, such as time intervals between traversing two Measuring points or the like, to be used.
- the estimate ⁇ de state variable includes the case of the speed measurement as vector components, the speed and size tion the CALIBRATORS, which in the case of a rotary encoder keitsmessaku as velocity indicates the wheel circumference.
- the optimum filter comprises an extended Kalman filter.
- B k describes the dynamics of a determi ⁇ nist disorder Uk
- w k describes the random portion of the disorder.
- Another equation describes a line ⁇ ares observation model, that is a linear relationship between the true state x k and an observed state z k:
- the matrix H k describes the actual observation model that represents the relationship between the true state and the observed state
- v k represents ei ⁇ NEN noise term
- Self-calibration of vehicle sensors is calculated to determine the linearized state transition model and observation ⁇ model based on the previous values of the state variable Jakobi matrix. If the observation model and the state transition model are initially non-linear, then, using an extended Kalman filter method, first a linearization of the two matrices F k and H k can be performed using a Jakobi matrix. When viewed continuously over time, the linearized matrix F (instead of F k ) results
- Time t, and x f (x, u) describes a non-linear to ⁇ state transition model, wherein x represents an estimated by ⁇ average value of the state variable x.
- the value At is the time between two filter operations.
- the nonlinear observation model h (x) can be linearized as follows: where H again represents the linearized observation matrix.
- the state transition model F is linear, so it does not have to be linearized.
- the matrix is F
- the Kalman matrix K From the linearized observation matrix H and the prediction value P of the covariance P and the measurement uncertainty R, the Kalman matrix K can be calculated:
- the superscript T signals a transposed matrix
- the size y describes how closely the predicted value x means ⁇ the current measured value by means of the Beobachtungsmo ⁇ H dells to describe is capable.
- the measured values relating to a wear process of a functional element of the slide ⁇ nenEnglishs and the state variable comprises a wear ⁇ state of the functional element.
- this variant can be applied to an opening operation of a vehicle door, wherein the state variable relates to a wear state of functional elements of the door.
- the calibration values serve in this embodiment of the information whether a functional element is worn and needs to be replaced or not.
- an automated function monitoring can be performed.
- the Maintenance intervals can be based on the actual wear of the vehicle door, whereby unnecessary maintenance and personnel costs can be avoided and still the functionality of the vehicle door can be guaranteed.
- a wear of a wheel of a rail vehicle can be monitored as a wear process. If a wheel diameter is determined which is below a predetermined threshold value, the wheel must be replaced.
- personnel can be saved for complex inspection views of technical components of a rail vehicle. The invention will be explained in more detail below with reference to the beige ⁇ added figures using exemplary embodiments. Show it:
- FIG. 1 shows a flowchart which illustrates a method for self-calibration of vehicle sensors of a rail vehicle according to a first exemplary embodiment of the invention
- FIG. 2 shows a block diagram which illustrates a calibration device according to an embodiment of the invention
- FIG 3 shows a block diagram illustrating a rail vehicle with egg ⁇ ner calibration device according to an embodiment of the invention.
- a flow chart 100 is shown which comprises a United ⁇ go to self-calibration of a sensor system of a slide ⁇ nenhuss according illustrates an embodiment of the invention.
- step 1.1 first reco ⁇ te W t of the rotation frequency W received as sensor data from a rotary encoder.
- the measured values W t indicate the height of the rotational frequency of the wheels of the rail vehicle.
- step l.II the current using an extended Kalman filter values v t, Ct for the speed v and the wheel circumference c ermit- telt.
- the circumference at the same time c to the aktualisie ⁇ leaders calibration value is based on older values v t -At / c t -At for the speed v and the wheel circumference c and the currently determined value W t of the rotational frequency of the W Wheels of the rail vehicle.
- the calculated new values c t, v t for the wheel circumference and the VELOCITY c ⁇ velocity v of the rail vehicle are output at step l.III to a control device and at least the actual speed value v t browser displays a vehicle operator. Furthermore, it returns to the step 1.1 and detects a new measured value W t + At the rotational frequency W of the rotary encoder and thus the wheels of the rail vehicle.
- step l.II new values c t + At / t + At are determined on the basis of the new measured value W t + At and the updated values c t , v t .
- the determined values c t + At / t + At are output to a controller, and the speed value v t + At is displayed to the driver.
- tion means a CALIBRATORS 20 according to an exemplary embodiment of the invention ⁇ illustrated.
- the calibration means 20 includes fully a data receive interface 21, with the Messda ⁇ t th W from one or more sensor units are received.
- the measurement data W t averages to a filter unit 22 exceeds that on the basis of the measurement data W t and on the basis ⁇ l ⁇ more excellent values v t -At / c t -At for the speed v and the wheel ⁇ circumference C using an extended Kalman filters new Wer ⁇ te v t , c t for the speed v and the wheel circumference c he ⁇ averages.
- the new speed value v t a starting interface output to a control device 23 which t the speed value v for example in a Füh ⁇ rerstand for displaying brings.
- the new values are v t, c t from the filter unit 22 at a later time t + At utilized to re-updated calibration values Ct + At and speed values v t + At identify etc ..
- a rail vehicle 30 is illustrated.
- the rail vehicle 30 includes a sensor unit 31, ⁇ example, a rotary encoder unit, with the values of W t ⁇ the rotation frequency W of the wheels of the railway vehicle 30 determines the advertising.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Manufacturing & Machinery (AREA)
- Computer Networks & Wireless Communication (AREA)
- Navigation (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017213806.8A DE102017213806A1 (de) | 2017-08-08 | 2017-08-08 | Kalibration von Fahrzeugsensoren |
| PCT/EP2018/069629 WO2019029967A1 (de) | 2017-08-08 | 2018-07-19 | Kalibration von fahrzeugsensoren |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3625575A1 true EP3625575A1 (de) | 2020-03-25 |
Family
ID=63113478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18750348.7A Withdrawn EP3625575A1 (de) | 2017-08-08 | 2018-07-19 | Kalibration von fahrzeugsensoren |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3625575A1 (de) |
| DE (1) | DE102017213806A1 (de) |
| WO (1) | WO2019029967A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018213940A1 (de) * | 2018-08-17 | 2020-02-20 | Robert Bosch Gmbh | Vorrichtung mit einer Sensoreinheit und einer Selbstkalibrierungsfunktion |
| DE102019211944A1 (de) * | 2019-08-08 | 2021-02-11 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Verfahren zur Bestimmung einer lokalen Wagengeschwindigkeit eines Wagens |
| WO2022236833A1 (zh) * | 2021-05-14 | 2022-11-17 | 华为技术有限公司 | 参数标定模型、训练方法、参数标定装置和车辆 |
| DE102022208176A1 (de) * | 2022-08-05 | 2024-02-08 | Robert Bosch Gesellschaft mit beschränkter Haftung | Verfahren zum Auswerten von Sensordaten, Recheneinheit zum Auswerten von Sensordaten und Sensorsystem, Verfahren zum Herstellen eines Sensorsystems |
| CN116156445B (zh) * | 2023-01-04 | 2025-01-28 | 西安电子科技大学 | 通感一体化背景下的多传感器网络系统误差校正方法 |
| CN120233119A (zh) * | 2025-06-03 | 2025-07-01 | 创值汽车配件(上海)有限公司 | 一种汽车传感器的校准方法和系统 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19757333C1 (de) * | 1997-12-22 | 1999-09-16 | Litef Gmbh | Selbsttätige, schnelle Kalibrierung einer bordautonomen Messung eines Geschwindigkeitsvektors |
| DE19812426A1 (de) * | 1998-03-20 | 1999-09-23 | Valeo Electronics Gmbh & Co Kg | Einstellung von Sensoren mit dem Geschwindigkeitsvektor |
| DE19919249A1 (de) * | 1999-04-28 | 2000-11-02 | Bodenseewerk Geraetetech | Koppelnavigationssystem |
| AU2003264048A1 (en) * | 2002-08-09 | 2004-02-25 | Intersense, Inc. | Motion tracking system and method |
| US7511662B2 (en) * | 2006-04-28 | 2009-03-31 | Loctronix Corporation | System and method for positioning in configured environments |
| DE102014226612B4 (de) * | 2014-12-19 | 2021-05-20 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Verfahren zur Ermittlung der Geschwindigkeit eines Schienenfahrzeuges |
| CA2932782A1 (en) * | 2015-06-12 | 2016-12-12 | 7725965 Canada Inc. | Orientation model for inertial devices |
-
2017
- 2017-08-08 DE DE102017213806.8A patent/DE102017213806A1/de not_active Ceased
-
2018
- 2018-07-19 EP EP18750348.7A patent/EP3625575A1/de not_active Withdrawn
- 2018-07-19 WO PCT/EP2018/069629 patent/WO2019029967A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102017213806A1 (de) | 2019-02-14 |
| WO2019029967A1 (de) | 2019-02-14 |
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| Date | Code | Title | Description |
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| AX | Request for extension of the european patent |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: PALMER, ANDREW Inventor name: CALDER, STEVEN ALEXANDER Inventor name: NOURANI-VATANI, NAVID Inventor name: KETABDAR, HAMED |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: PALMER, ANDREW Inventor name: KETABDAR, HAMED Inventor name: CALDER, STEVEN ALEXANDER Inventor name: NOURANI-VATANI, NAVID |
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| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
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| 18D | Application deemed to be withdrawn |
Effective date: 20200728 |