EP3601967A1 - Method, control unit and system for detecting an oscillation of a vehicle part for a vehicle - Google Patents
Method, control unit and system for detecting an oscillation of a vehicle part for a vehicleInfo
- Publication number
- EP3601967A1 EP3601967A1 EP18706484.5A EP18706484A EP3601967A1 EP 3601967 A1 EP3601967 A1 EP 3601967A1 EP 18706484 A EP18706484 A EP 18706484A EP 3601967 A1 EP3601967 A1 EP 3601967A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vehicle
- vehicle part
- coil
- signal
- position element
- 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- Withdrawn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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
- G01H1/12—Measuring characteristics of vibrations in solids by using direct conduction to the detector of longitudinal or not specified vibrations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/02—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by magnetic means, e.g. reluctance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
Definitions
- the present invention relates to a method for detecting a
- a detection or measurement of vibrations is a common method for testing and also monitoring of materials and components. For this purpose, different measuring principles can be used in industry.
- the present invention provides an improved method for detecting a vibration of a vehicle part for a vehicle, an improved control device, an improved system for detecting a vibration of a vehicle part for a vehicle, an improved vehicle and an improved use of a detection device for detecting a vibration a vehicle part for a vehicle according to the main claims.
- an inductive vibration detection in a vibration measurement for example in the field of automotive electronics, passenger cars, vehicles, etc.
- the inductive vibration detection can be realized using at least one planar coil.
- an inductive vibration sensor having at least one electric coil can be designed to detect a vibration of at least one vehicle part of a vehicle.
- physical variables of vibration, noise, noise, pressure, forces, compression pressure, etc. in a vehicle can be reliably measured, space-saving, and monitored to improve or maintain comfort of vehicle occupants.
- vibration detection may be further realized for moving vehicle parts and additionally or alternatively rotating vehicle parts to monitor a physical condition of such vehicle parts and to increase safety.
- a stress on vehicle parts due to vibration can be detected early, so that cracks, fractures, fatigue and overstressing of vehicle parts can be avoided.
- a method for detecting a vibration of a vehicle part for a vehicle comprises at least the following steps:
- the vehicle may be a motor vehicle, in particular a land vehicle, a watercraft, an aircraft or the like, such as a passenger car, a truck or any other commercial vehicle.
- the vehicle part may or may not be installed in the vehicle. In this case, the vehicle part in a state installed in the vehicle relative be arranged to the vehicle translationally and additionally or alternatively rotatably movable.
- a vibration of the vehicle part can cause a vibration of the at least one position element.
- the at least one position element can be coupled mechanically directly or indirectly to the vehicle part.
- the electrical coil signal represents a signal picked up in response to the electrical excitation signal on the at least one coil and influenced by the at least one position element.
- the steps of the method may be performed during operation of the vehicle.
- Such an embodiment offers the advantage that a measurement and monitoring of the vehicle part can also be carried out on an oscillation, for example during a drive of the vehicle, in a test operation of the vehicle or the like.
- a sine signal or a signal having a further waveform than the electrical excitation signal can be applied to the at least one electrical coil.
- a suitable excitation signal can be applied in order to achieve a reliable resolution.
- an amplitude, a frequency and, additionally or alternatively, another magnitude of a vibration function may be determined as the at least one characteristic of the vibration of the vehicle part.
- a fast Fourier transform of the read electric coil signal can be performed. In this way, an analysis of the coil signal can be simplified and accelerated to detect the reliable oscillation.
- step of determining the read in electrical coil signal can be amplified.
- Such an embodiment offers the advantage that an exact and safe processing of the coil signal can be achieved, regardless of which type of position element is used or whether an attenuation of the coil signal by the position element occurs.
- the method also includes a step of generating a detection signal using the at least one characteristic of the vibration of the vehicle part determined in the step of determining.
- the detection signal may represent information about a physical condition of the vehicle part, in particular a probability of a crack, fracture, fatigue and additionally or alternatively a load of the vehicle part.
- control unit which is designed to execute, to control or to implement the steps of a variant of a method presented here in corresponding devices. Also by this embodiment of the invention in the form of a control device, the object underlying the invention can be achieved quickly and efficiently.
- control unit can have at least one arithmetic unit for processing signals or data, at least one memory unit for storing signals or data, at least one interface to a sensor or an actuator for reading sensor signals from the sensor or for outputting control signals to the actuator and / or or at least a communication interface for reading or outputting data embedded in a communication protocol.
- the arithmetic unit may be, for example, a signal processor, a microcontroller or the like, wherein the memory unit may be a flash memory, an EEPROM or a magnetic memory unit.
- the communication interface can be designed to read in or output data wirelessly and / or by cable, wherein a communication interface which can read in or output line-bound data, for example electrically or optically transmits these data. read table from a corresponding data transmission line or can output to a corresponding data transmission line.
- a control device can be understood as meaning an electrical device which processes sensor signals and outputs control and / or data signals in dependence thereon.
- the control unit may have an interface, which may be formed in hardware and / or software.
- the interfaces can be part of a so-called system ASIC, for example, which contains various functions of the control unit.
- the interfaces are their own integrated circuits or at least partially consist of discrete components.
- the interfaces may be software modules that are present, for example, on a microcontroller in addition to other software modules.
- Also of advantage is a computer program product with program code which can be stored on a machine-readable carrier such as a semiconductor memory, a hard disk memory or an optical memory and is used to carry out the method according to one of the embodiments described above, when the program is stored on a computer, a control unit or a device is executed.
- a machine-readable carrier such as a semiconductor memory, a hard disk memory or an optical memory
- a system for detecting a vibration of a vehicle part for a vehicle comprises at least the following features: an embodiment of the aforementioned control device; and at least one detection device, wherein the at least one detection device comprises at least one electrical coil and at least one position element, wherein the at least one position element is coupled or coupled to the vehicle part, wherein the at least one electrical coil is inductively coupled or coupled to at least one position element, wherein the control unit and the at least one electrical coil signal transmission capable of being connected or connected to each other.
- an embodiment of the above-mentioned controller in conjunction with the at least one detecting device may be used or used to detect the vibration of the vehicle part.
- the at least one electrical coil can be embodied as a single-layered or multi-layered coil and / or as a planar coil.
- Such an embodiment offers the advantage that, depending on the specific application of the detection device, a suitable and, in particular, space-saving design of the coil can be selected.
- the at least one position element can be formed from an electrically conductive material or an electrically insulating and magnetically permeable material.
- a gain or an attenuation of the coil signal can be realized in order to enable a reliable and accurate detection of the oscillation.
- the at least one position element in a state coupled to the vehicle part may be movable along and additionally along a rotation of the vehicle part, or alternatively transversely to a winding axis of the at least one electrical coil.
- Vibration of the vehicle part a suitable detection and reliable detection can be enabled.
- the at least one detection device may comprise at least one membrane.
- the at least one position element can be attached to a first side of the at least one membrane.
- a second side of the membrane may be disposed on the vehicle part.
- the system may include at least one detection device for each vehicle part.
- a use of a detection device for detecting a vibration of a vehicle part for a vehicle is also presented, wherein the detection device has at least one electric coil and at least one position element, wherein the at least one position element can be coupled or coupled to the vehicle part, wherein the at least one electrical coil inductively coupled or coupled with at least one position element.
- Fig. 1 is a schematic representation of a vehicle with a system according to an embodiment of the present invention
- FIG. 2 is a schematic illustration of a vehicle having a system according to an embodiment of the present invention
- FIG. 3 is a flowchart of a method for detecting according to an embodiment of the present invention.
- FIG. 4a, b is a perspective view of a two-ply planar coil and a two-ply planar coil with a position element / damping element;
- FIG. 4c, d schematic plan view of a planar coil with a hexagonal shaped position element / damping element (copper or ferrite) and a planar coil with a diamond-shaped position element / damping element;
- FIG. 5a, b is a schematic representation of an embodiment of an inductive vibration sensor and a schematic representation of the embodiment shown in Fig. 5a of an inductive vibration sensor in the mounted state on a vibrating surface.
- the vehicle 100 is a motor vehicle, such as a passenger car, truck or other commercial vehicle.
- the vehicle 100 has at least one vehicle part 105 and the system 110.
- the vehicle 100 has, for example, only one vehicle part 105 or, for example, only one vehicle part 105 is shown by the vehicle 100.
- the vehicle part 105 may be subject to vibration, for example during operation of the vehicle 100.
- the vehicle part 105 may be rotatably or slidably disposed in the vehicle 100 relative to the vehicle 100.
- the system 110 is configured to detect a vibration of the vehicle part 105.
- the system 110 includes an at least detection device 120 and a controller 130. According to the embodiment of the present invention shown in FIG. 1, the system 110 has, for example, only one detection device 120 and the control device 130. The control device 130 and the detection device 120 are connected to each other in a signal-transmitting manner.
- the detection device 120 has at least one position element 122 and at least one electrical coil 124. In accordance with the exemplary embodiment of the present invention illustrated here, the detection device 120 has, for example, only one position element 122 and by way of example only one electrical coil 124.
- the position element 122 and the electric coil 124 are disposed adjacent to each other. Here, the position element 122 and the electric coil 124 are inductively coupled together.
- the position element 122 is coupled to the vehicle part 105. Specifically, the positioning member 122 is mechanically or directly mechanically attached to the vehicle part 105 or vibrationally coupled to the vehicle part 105. According to one embodiment, the position element 122 is formed of an electrically conductive material. According to a further embodiment, the position element 122 is formed from an electrically insulating and magnetically permeable material. In a coupled to the vehicle part 105 state, the position element 122 is movable according to one embodiment by a vibration of the vehicle part 105 along and / or transversely to a winding axis of the electric coil 124. The electric coil 124 is connected to the control unit 130 of the system 110 in a signal-transmitting manner. The electric coil 124 is designed, for example, as a single-layer or multi-layer coil. Additionally or alternatively, the electrical coil 124 is designed as a planar coil.
- the controller 130 is configured to control detection of the vibration of the vehicle part 105 and / or to perform using the detection device 120.
- the control device 130 has an application device 132, a read-in device 134 and a determination device 136.
- the application device 132 is designed to apply an electrical excitation signal 133 to the electrical coil 124.
- the excitation signal 132 is, for example, a rectangular signal, a sine signal or a signal having a further signal form.
- the read-in device 134 is designed to read in an electrical coil signal 125 from the electrical coil 124.
- the electrical coil signal 125 is a signal which, in response to the electrical excitation signal 133, is tapped on the electric coil 124 and through which at least a position element 122 or its effect on the excitation signal 133 is influenced.
- the read-in device 134 is also designed to forward the electrical coil signal 125 to the determination device 136.
- the determining device 136 is configured to determine at least one property of the vibration of the vehicle part 105 using the electric coil signal 125.
- the determining device 136 is designed to determine an amplitude, a frequency and / or a further variable of a vibration function as the at least one property of the vibration of the vehicle part 105.
- the determining device 136 according to an embodiment is designed to perform a fast Fourier transformation on the read-in electric coil signal 125 and / or to amplify the electrical coil signal 125.
- the determining means 136 is configured to provide property information 137 representing the at least one specific characteristic of the vibration.
- the control unit 130 further has a generator 138.
- the generator 138 is configured to generate a detection signal 139 using the property information 137.
- the detection signal 139 in this case represents information about a physical state of the vehicle part 105.
- the information about the physical state for example, a probability of crack, fracture, fatigue and / or stress of the vehicle part 105th
- FIG. 2 shows a schematic representation of a vehicle 100 with a system 110 according to an embodiment of the present invention.
- the system 1 10 corresponds to the system of FIG. 1 except that the detection device 120 has a diaphragm 223 to which the position element 122 is attached.
- the position element 122 is attached to a first side of the membrane 223.
- a second side of the diaphragm 223 facing away from the first side is arranged on the vehicle part 105 or facing the vehicle part 105.
- 3 shows a flow chart of a method 300 for detecting according to an embodiment of the present invention.
- the method 300 is operable to detect a vibration of a vehicle part for a vehicle.
- the method 300 for detecting in conjunction with the system and / or by means of the control unit and using the detection device of FIG. 1 or FIG. 2 or a similar system, a similar control device or a similar detection device executable.
- step 310 of the application in the method 300, an electrical excitation signal is applied to the at least one electrical coil of the detection device.
- step 320 of the read-in an electrical coil signal is read in by the at least one electrical coil.
- the electrical coil signal represents a signal picked up in response to the electrical excitation signal applied in step 310 of the application on the at least one coil tapped and influenced by the at least one position element.
- at least one property of the vibration of the vehicle part is determined in a step 330 of determining using the electric coil signal read in step 320 of the read-in.
- the method 300 also includes a step 340 of generating a detection signal using the at least one property of the vibration of the vehicle part determined in step 330 of determining.
- the detection signal represents information about a physical condition of the vehicle part, in particular a probability of a crack, fracture, fatigue and / or stress on the vehicle part.
- step 310 of the application the step 320 of the read in and the step 330 of the determination during an operation or test operation of the vehicle are carried out.
- step 320 of the read in the step 320 of the read in and the step 330 of the determination during an operation or test operation of the vehicle are carried out.
- FIGS. 1 to 3 exemplary embodiments of the present invention will be summarized in other words and / or briefly explained.
- Inductive vibration detection may be performed by the system 110 or by performing the method 300 using at least one single-layer or multi-layer (two-layer) planar coil 124 having a horizontally sliding or vertically movable conductive metal piece, for example, copper, aluminum, or brass over the at least one planar coil 124 be performed as a position element 122, wherein the electrical coil 124 or Planarin- dutationsspule a variable coil signal 125 generates the magnitude and frequency with a vibration frequency (both vertically and horizontally) or moving distance (vertical and horizontal) of the conductive metal piece or position element 122 changes under the influence of eddy current damping effects.
- an electrically non-conductive or insulating, but magnetically permeable activator element or position element 122 may be used instead of the conductive position element made of copper, aluminum or brass.
- a sturdy but thin membrane 223 of plastic, polymer, or other suitable material to which the activator element 122 is fixedly attached may additionally be used, with the second side of the membrane 223 attached to it Vehicle part 105 and a vibrating surface is arranged. Together with the vibrating surface, the diaphragm 223 vertically moves up and down at an oscillation frequency, thereby causing the positioning element 122 to vertically move up and down at the same frequency above / below the electric coil 124.
- FFT Fast Fourier Transform
- the electrical coil 124 may be excited with a square / square / sine signal as the excitation signal 133.
- a highly permeable ferrite material (electrically non-conductive or insulating) can thus be used for the position element 122.
- the coil signal 125 is amplified by the high permeability ferrite material rather than attenuated.
- a minor modification of electrical circuitry and physical arrangements of the thin, robust membrane 223 and position element (activator element) 122 and the at least one coil 124 may be performed to include an inductive sensor for pressure, force / compression pressure, noise, and also Shift (in all three directions X, Y, Z) to realize.
- Fig. 4a shows a perspective view of a two-ply planar coil, which can serve as a coil 124 in a system for vibration detection.
- the planar coil can be printed on a circuit board, for example.
- FIG. 4b shows a two-layer planar coil 124 with a position element 122 / damping element, wherein the position element 122 is configured as a rhombus-shaped copper element.
- the rhombus / diamond-shaped position element serves to influence the inductance of the coil 124 as a function of the distance to the coil 124.
- 4c shows a schematic plan view of a planar coil with a hexagonally shaped position element / damping element 122, wherein only the shaped part contour of the position element 122 is shown.
- the position element 122 may be formed of copper, and in this case serves to further attenuate the inductance of the coil 124 as the position element 122 approaches the coil 124.
- the position element can also be made of a ferrite. Thus, the inductance of the coil 124 is increased with decreasing distance between the coil 124 and the position member 122.
- 4 d shows a planar coil 124 with the molded part contour of a diamond-shaped positioning element / damping element 122.
- the geometry of the positioning element 122 plays a role in the damping properties of the position element 122 with respect to the inductance of the coil 124.
- FIG. 5a shows a schematic illustration of an embodiment of an inductive vibration sensor
- FIG. 5b shows a schematic representation of the embodiment of an inductive vibration sensor shown in FIG. 5a in the assembled state on a vibrating surface 700.
- the inductive oscillation sensor Sensor can be understood as a system 1 10 for vibration detection.
- the sensor 1 10 includes a housing 550 made of a plastic. A lower side of the housing 550 is closed by a membrane 223. On the membrane 223 inside the housing 550, a position element 122 is arranged. The diaphragm 223 and the position member 122 are configured to vibrate synchronously with the vibrating surface 700 of a vehicle part to be monitored. Opposite the position element 122, an electrical coil 124 is arranged on a circuit board 570.
- the coil 124 and the position element 122 are spatially separated from each other by a distance d.
- the distance d may be, for example, between 0.15 and 0.45 mm. Due to the changes in the distance caused by the vibrations, the inductance of the coil 124 changes. Monitoring the inductance can thus serve as monitoring of the vibration of the vehicle part.
- the sensor 10 further comprises a control device 130 with a contact device 132 and a read-in device 134.
- the application direction 132 sends an excitation signal 133 to the coil 124.
- the read-in device 134 serves to read in a coil signal 125 from the coil 124.
- the controller 130 outputs a detection signal 139.
- an embodiment comprises a "and / or" link between a first feature and a second feature, this can be read so that the embodiment according to an embodiment, both the first feature and also has the second feature and according to another embodiment either only the first feature or only the second feature.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017205052.7A DE102017205052A1 (en) | 2017-03-24 | 2017-03-24 | Method, control unit and system for detecting a vibration of a vehicle part for a vehicle |
PCT/EP2018/053971 WO2018171999A1 (en) | 2017-03-24 | 2018-02-19 | Method, control unit and system for detecting an oscillation of a vehicle part for a vehicle |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3601967A1 true EP3601967A1 (en) | 2020-02-05 |
Family
ID=61256950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18706484.5A Withdrawn EP3601967A1 (en) | 2017-03-24 | 2018-02-19 | Method, control unit and system for detecting an oscillation of a vehicle part for a vehicle |
Country Status (5)
Country | Link |
---|---|
US (1) | US20200096386A1 (en) |
EP (1) | EP3601967A1 (en) |
CN (1) | CN110446908A (en) |
DE (1) | DE102017205052A1 (en) |
WO (1) | WO2018171999A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11016002B2 (en) * | 2018-10-30 | 2021-05-25 | Ford Global Technologies, Llc | In situ vibration-based verification of vehicle doors |
CN109520695B (en) * | 2019-01-11 | 2023-10-20 | 广西科技大学 | Vibrating table for researching vibration characteristics of oval packaging material |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9017718U1 (en) | 1990-11-29 | 1991-10-10 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De | |
US7421321B2 (en) * | 1995-06-07 | 2008-09-02 | Automotive Technologies International, Inc. | System for obtaining vehicular information |
US5580084A (en) * | 1995-09-12 | 1996-12-03 | Artistic Analytical Methods, Inc. | System and method for controlling vehicle safety device |
US7081801B2 (en) * | 2004-03-05 | 2006-07-25 | Key Safety Systems, Inc. | Magnetostrictive stress wave sensor |
DE102005028214A1 (en) | 2005-06-17 | 2006-12-21 | Siemens Ag | Vibration Measurement System |
CN102759394B (en) * | 2011-04-26 | 2014-05-21 | 中国移动通信集团公司 | Device and method for detecting vibration of vehicle body |
DE102011102796A1 (en) | 2011-05-23 | 2012-11-29 | Trw Automotive Electronics & Components Gmbh | Position sensor, actuator-sensor device and method for inductive detection of a position |
DE102015200620A1 (en) | 2015-01-16 | 2016-07-21 | Zf Friedrichshafen Ag | Inductive position determination |
CN105203203B (en) * | 2015-09-07 | 2018-09-28 | 中国科学院地质与地球物理研究所 | A kind of microvibration measuring device and its measurement method based on magnetic field |
US9824511B2 (en) * | 2015-09-11 | 2017-11-21 | GM Global Technology Operations LLC | Vehicle diagnosis based on vehicle sounds and vibrations |
DE202016003492U1 (en) | 2016-06-02 | 2016-06-22 | Werhahn & Nauen SE & Co. OHG | Sensor for vibration machine |
-
2017
- 2017-03-24 DE DE102017205052.7A patent/DE102017205052A1/en not_active Withdrawn
-
2018
- 2018-02-19 CN CN201880019770.7A patent/CN110446908A/en active Pending
- 2018-02-19 US US16/496,318 patent/US20200096386A1/en not_active Abandoned
- 2018-02-19 WO PCT/EP2018/053971 patent/WO2018171999A1/en active Application Filing
- 2018-02-19 EP EP18706484.5A patent/EP3601967A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
WO2018171999A1 (en) | 2018-09-27 |
DE102017205052A1 (en) | 2018-09-27 |
US20200096386A1 (en) | 2020-03-26 |
CN110446908A (en) | 2019-11-12 |
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