WO2014114293A1 - Aufprallsensor mit triboelektrischem effekt für ein kraftfahrzeug - Google Patents
Aufprallsensor mit triboelektrischem effekt für ein kraftfahrzeug Download PDFInfo
- Publication number
- WO2014114293A1 WO2014114293A1 PCT/DE2014/200014 DE2014200014W WO2014114293A1 WO 2014114293 A1 WO2014114293 A1 WO 2014114293A1 DE 2014200014 W DE2014200014 W DE 2014200014W WO 2014114293 A1 WO2014114293 A1 WO 2014114293A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- impact sensor
- impact
- conductor
- sensor according
- electrical
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0052—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to impact
Definitions
- the invention relates to an impact sensor for a motor vehicle according to the preamble of claim 1.
- Such an impact sensor is known, for example, from EP 0937612 A2, where in particular the interruption of an electrical conductor or of this change in the electrostatic capacitance between 2 metallic plates is evaluated in the event of an impact.
- the electrical conductor must be permanently energized.
- a triboelectric sensor cable for burglar surveillance in which an air separation element and an electrically insulating plastic element are provided to detect vibrations acting on the sensor cable due to burglary attempts.
- the object of the present invention is to present an alternative concept for a crash sensor for a motor vehicle.
- An essential idea of the invention is that the triboelectric effect known per se (cf., Wikipedia for frictional electricity), ie the frictional electricity between materials with different electron affinity, can be utilized to detect relative movements, that is to say an impact.
- the electrical conductor is made of a first, electrically conductive material and disposed within a second material, wherein upon impact from a predetermined direction of the conductor and / or the second material relative to each other to generate friction between the first and The second material are movable and the resulting by this friction between the first and second material in the electrical conductor, electrical charge transfer, for example, is detected in the form of electrical voltage.
- the cross sections and at least the second material is partially elastic, as is already the case, for example, with conventional coaxial cables.
- the second material has at least a predetermined distance in the triboelectric series or a predetermined distance in the electron affinity with respect to the first material, a sufficient signal-to-noise ratio sufficient in response to a predetermined strength of the impact as a standard for suitable materials for a given cable shape is and also by the shape of the cable, in particular the size of the friction surface between 1. and 2. material can also be significantly influenced.
- the impact sensor is constructed as a round cable, wherein the electrical conductor is arranged in the interior of the second material.
- the charge shift can also be detected as such by means of a suitable circuit, for example a charge amplifier.
- a suitable circuit for example a charge amplifier.
- the detection of the charge shift is usually a form of voltage measurement, but perhaps not directly on the charge-carrying conductor but at the output of the intermediate circuit, so for example.
- a charge amplifier for example, the charge amplifier.
- the impact sensor is designed as a flat conductor, wherein the electrical conductor has at least one friction surface to the second material.
- a flat conductor arrangement also allows a very simple production and also a large friction surface between the 1. and 2. material.
- the impact sensor has an outer electrically conductive shielding shell, which is electrically connected to ground potential.
- the electrical conductor can be subjected to a test current. It should be noted, however, that the required test current can be extremely low, so that possibly even a permanent test at the same time for impact detection is possible, but preferably such a test, for example, when the vehicle is stationary and commissioning of the sensor, alternatively cyclically such test phases to be provided.
- reference numeral 1 denotes the electrical conductor and reference numeral 2 denotes the second material, which is preferably nonconductive and has sufficiently different electron affinity, and 3 denotes an outer, electrically conductive sheath for shielding.
- the directional indications X, Y and Z correspond to the definition in the motor vehicle with X as the direction of travel, Y as the transverse direction and Z in the vertical axis. Show it
- Figure 1 1. Design as coaxial cable.
- Figure 2 2nd embodiment as a flat conductor.
- Figure 3 embodiment with two electrical conductors in a cable and two
- FIG. 4 shows a cross-section of an impact sensor in the form of a coaxial cable arranged over the length of a vehicle front, that is to say in the Y direction, with a collision of the vehicle with a pedestrian or other obstacle being counteracted by a force F acting as the main impact direction Direction of travel is considered and there is a deformation, in particular crushing of the impact sensor.
- the sensor can be used on any other side of the vehicle, ie laterally or in the rear bumper.
- the electrical conductor (1) is made of a first electrically conductive material, for example copper or comparable metals.
- the conductor 1 is in contact with a second material (2), here even completely embedded in this or enclosed by this, wherein the second material is preferably selected non-conductive and with sufficiently different electron affinity.
- the conductor (1) and / or the second material (2) are movable relative to each other to create friction between the first and second materials.
- the second material 2 is primarily pressed by the force F around the conductor (1) and, due to the friction occurring, a charge carrier release and a voltage pulse are generated which are detected in a conventional manner by a suitable evaluation circuit. From the strength of this voltage pulse can be concluded that the presence and preferably even the strength of the impact.
- the second material preferably has at least a predetermined distance in the triboelectric series or a predetermined distance in the electron affinity with respect to the first material.
- the strength of the voltage pulse can be influenced, depending on spatial and material conditions application-specific adjustments can be made to achieve a sufficient signal-to-noise ratio.
- the impact sensor is constructed there as a round cable, wherein the electrical conductor (1) is arranged in the interior of the second material (2).
- a wound around a core shape of an electrical conductor could be provided, wherein the core then, for example, may consist of the second material.
- the core then, for example, may consist of the second material.
- FIG. 2 shows the impact sensor as a flat conductor, wherein the electrical conductor (1) has at least one friction surface for the second material (2), here even two sides friction surfaces on both sides above and below the electrical conductor 1 with a significantly larger total friction surface and thus higher amount on free charge carriers than in a comparably large arrangement according to FIG. 1.
- the electrical conductor 1 is wider in its cross-sectional area in the direction of travel X than in the vertical direction Z, so that in a collision F, the second material can be displaced well along this relatively large friction surfaces.
- Such an arrangement can also be arranged running across the width of the vehicle front in the Y direction of the vehicle, for example within the bumper.
- the impact sensor preferably has an outer electrically conductive shielding shell (3), which is electrically connected to ground potential.
- the electrical conductor (1) for Test for integrity of the line subjected to a test current is particularly suitable in the outer region of the motor vehicle, in particular the bumper on the vehicle front or in the rear, but also the side areas, such as the doors.
- one sensor evaluation unit (S1, S2) is preferably provided at both ends of the impact sensor, which comprises means for detecting a voltage (here sketched as an operational amplifier) has at least one of the electrical conductors.
- a voltage here sketched as an operational amplifier
- there the electrical wiring for the generation of the test current in the form of a preferably switchable power source (ITEST) and the electrical ground connection of the conductor 1 via an example. High resistance at the opposite end of the conductor 1 is sketchily indicated.
- the outer shielding shell 3 is connected directly to ground potential.
- the current source can also be permanently switched on or configured non-switchable.
- the resistance should have a value at which the test current gives an evaluable voltage.
- the conductor can also be routed as a ring conductor over the crash zone and fed back and the sensor evaluation unit (S1, S2) structurally integrated into a housing or be connected in a multiplex operation, a single Sensorausnce niethacin alternately with the conductors.
- a temperature sensor is provided on the impact sensor outside in a distance which is still sufficiently short for the temperature conditions at the impact sensor or within the impact sensor, ie within this, and temperature influences in the measurement signal are reduced on the basis of the temperature and a temperature characteristic.
- a separate sensor such as, for example, a PTI element, can be used as a temperature sensor or a corresponding circuit on the wire itself, for example by energizing it and measuring the temperature-dependent internal resistance of the conductor.
- Moisture can also affect the mechanical friction and in particular the triboelectric effect and a corresponding signal of a humidity sensor can be used to detect any disturbances on the impact sensor and to warn the driver or their influence in the signal of the impact sensor based on the measured moisture and a characteristic to reduce.
- the path shown there as a ground terminal would either actually be connected to the ground potential of the circuit, that is, for example, also the shielding of the cable or conceivable also on a separate return line, such as in a ring conductor arrangement.
- a measurement of the charge transfer, for example, by means of such a charge amplifier circuit has advantages over the direct voltage measurement, for example, is less susceptible to EMC and allows an amplification of the relatively small charge displacement by the triboelectric effect.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112014000503.7T DE112014000503B4 (de) | 2013-01-22 | 2014-01-20 | Aufprallsensor mit triboelektrischem Effekt für ein Kraftfahrzeug |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013100624.8A DE102013100624A1 (de) | 2013-01-22 | 2013-01-22 | Aufprallsensor mit triboelektrischem Effekt für ein Kraftfahrzeug |
DE102013100624.8 | 2013-01-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014114293A1 true WO2014114293A1 (de) | 2014-07-31 |
Family
ID=50272245
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2014/200014 WO2014114293A1 (de) | 2013-01-22 | 2014-01-20 | Aufprallsensor mit triboelektrischem effekt für ein kraftfahrzeug |
Country Status (2)
Country | Link |
---|---|
DE (2) | DE102013100624A1 (de) |
WO (1) | WO2014114293A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111562617A (zh) * | 2020-05-27 | 2020-08-21 | 珠海格力智能装备有限公司 | 碰撞检测装置 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014204864A1 (de) | 2014-03-17 | 2015-09-17 | Continental Automotive Gmbh | Triboelektrischer Aufprallsensor für ein Kraftfahrzeug mit Leiterabschlusselement |
DE102014204867A1 (de) | 2014-03-17 | 2015-09-17 | Continental Automotive Gmbh | Triboelektrischer Aufprallsensor für ein Kraftfahrzeug mit beidseitiger Ladungsverstärkerschaltung |
DE102014204866A1 (de) | 2014-03-17 | 2015-09-17 | Continental Automotive Gmbh | Aufprallsensor mit triboelektrischem Effekt mit Zonen unterschiedlicher Elastizität für ein Kraftfahrzeug |
FR3043864A1 (fr) * | 2015-11-13 | 2017-05-19 | Patrice Cocheteux | Dispositif de detection d'impact par triboelectrification |
WO2018077355A1 (de) | 2016-10-26 | 2018-05-03 | Continental Automotive Gmbh | Sensor mit triboelektrischem und kapazitivem effekt |
DE102016221081A1 (de) | 2016-10-26 | 2018-04-26 | Continental Automotive Gmbh | Aufprallsensorsystem mit triboelektrischem und kapazitivem Effekt |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2787784A (en) * | 1954-04-30 | 1957-04-02 | Harold T Meryman | Triboelectric detecting system |
EP0937612A2 (de) | 1998-02-24 | 1999-08-25 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Aufprallerkennungsvorrichtung für Kraftfahrzeug mit Detektionselementen in der Vorderstossstange |
US6130627A (en) * | 1996-11-07 | 2000-10-10 | Tyburski; Robert M. | Residual charge effect sensor |
US6367332B1 (en) * | 1999-12-10 | 2002-04-09 | Joseph R. Fisher | Triboelectric sensor and methods for manufacturing |
DE10230560A1 (de) * | 2002-07-05 | 2004-06-24 | Volkswagen Ag | Aufprallsensor |
DE112004001382T5 (de) | 2003-07-28 | 2006-06-29 | Senstar-Stellar Corp., Carp | Triboelektrisches Vermessungs- oder Doppelnutzungssicherheitssensorkabel und Verfahren zu seiner Herstellung |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29520731U1 (de) * | 1995-01-23 | 1996-03-14 | Siemens AG, 80333 München | Kabelsensor zur Detektion von Intrudern |
US6744354B2 (en) | 2002-09-23 | 2004-06-01 | Ford Global Technologies, Llc | System for sensing whether an object struck in a collision is a pedestrian |
DE20321016U1 (de) * | 2003-10-24 | 2005-12-01 | Cascade Microtech, Inc., Beaverton | Prüfstation mit rauscharmen Eigenschaften |
JP4161270B2 (ja) * | 2003-10-29 | 2008-10-08 | 株式会社デンソー | 衝突荷重検出センサ |
DE102004034001B4 (de) * | 2004-07-14 | 2008-07-10 | Siemens Ag | Vorrichtung zum Erfassen einer Kollision |
DE102005005908B3 (de) * | 2005-02-09 | 2006-10-05 | Siemens Ag | Kollisionssensor |
-
2013
- 2013-01-22 DE DE102013100624.8A patent/DE102013100624A1/de not_active Withdrawn
-
2014
- 2014-01-20 DE DE112014000503.7T patent/DE112014000503B4/de active Active
- 2014-01-20 WO PCT/DE2014/200014 patent/WO2014114293A1/de active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2787784A (en) * | 1954-04-30 | 1957-04-02 | Harold T Meryman | Triboelectric detecting system |
US6130627A (en) * | 1996-11-07 | 2000-10-10 | Tyburski; Robert M. | Residual charge effect sensor |
EP0937612A2 (de) | 1998-02-24 | 1999-08-25 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Aufprallerkennungsvorrichtung für Kraftfahrzeug mit Detektionselementen in der Vorderstossstange |
US6367332B1 (en) * | 1999-12-10 | 2002-04-09 | Joseph R. Fisher | Triboelectric sensor and methods for manufacturing |
DE10230560A1 (de) * | 2002-07-05 | 2004-06-24 | Volkswagen Ag | Aufprallsensor |
DE112004001382T5 (de) | 2003-07-28 | 2006-06-29 | Senstar-Stellar Corp., Carp | Triboelektrisches Vermessungs- oder Doppelnutzungssicherheitssensorkabel und Verfahren zu seiner Herstellung |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111562617A (zh) * | 2020-05-27 | 2020-08-21 | 珠海格力智能装备有限公司 | 碰撞检测装置 |
CN111562617B (zh) * | 2020-05-27 | 2023-05-09 | 珠海格力智能装备有限公司 | 碰撞检测装置 |
Also Published As
Publication number | Publication date |
---|---|
DE112014000503B4 (de) | 2022-04-21 |
DE112014000503A5 (de) | 2016-03-31 |
DE102013100624A1 (de) | 2014-07-24 |
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