SE533543C2 - Device for detecting driver presence in vehicle - Google Patents

Device for detecting driver presence in vehicle

Info

Publication number
SE533543C2
SE533543C2 SE0900490A SE0900490A SE533543C2 SE 533543 C2 SE533543 C2 SE 533543C2 SE 0900490 A SE0900490 A SE 0900490A SE 0900490 A SE0900490 A SE 0900490A SE 533543 C2 SE533543 C2 SE 533543C2
Authority
SE
Sweden
Prior art keywords
driver
seat
sensor
attenuation
vehicle
Prior art date
Application number
SE0900490A
Other languages
Swedish (sv)
Other versions
SE0900490A1 (en
Inventor
Tomas Lagoe
Original Assignee
Acticut Internat Ab
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 Acticut Internat Ab filed Critical Acticut Internat Ab
Priority to SE0900490A priority Critical patent/SE533543C2/en
Priority to PCT/SE2010/000095 priority patent/WO2010120226A1/en
Publication of SE0900490A1 publication Critical patent/SE0900490A1/en
Publication of SE533543C2 publication Critical patent/SE533543C2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/002—Seats provided with an occupancy detection means mounted therein or thereon
    • 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
    • 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
    • G01H1/14—Frequency
    • 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
    • G01H1/16—Amplitude
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/22—Status alarms responsive to presence or absence of persons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2210/00—Sensor types, e.g. for passenger detection systems or for controlling seats
    • B60N2210/50—Inertial sensors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Seats For Vehicles (AREA)

Description

533 543 <9~ Uppfinningen avser även ett sätt att detektera förarnârvaro i en anordning av det nânmda slaget. The invention also relates to a method of detecting driver presence in a device of the type mentioned.

Uppfinningen skall nu beskrivas närmare med hänvisning till de bifogade ñgurema, av vilka: figur 1 schematiskt visar en förarstol utan förare och figur 2 visar ett diagram för amplituden vid egenfrekvenser i förarstolen utan och med förare I figur 1 betecknas ett förarsåte med l , uppburet av ett centralt stödelement 2, som är förankrat i ett fordon eller en farkost 3, som inte visas närmare.The invention will now be described in more detail with reference to the accompanying drawings, of which: Figure 1 schematically shows a driver's seat without a driver and Figure 2 shows a diagram of the amplitude at natural frequencies in the driver's seat without a driver. Figure 1 shows a driver seat with 1, supported by a central support element 2, which is anchored in a vehicle or a vehicle 3, which is not shown in more detail.

En sensor 4 år innesluten, skyddad i ßrarsâtet 1. I detta fall utgörs sensorn 4 av en accelerometer, som mäter i två mot varandra vinkelrâta riktningar.A sensor 4 is enclosed, protected in the outer seat 1. In this case, the sensor 4 consists of an accelerometer, which measures in two mutually perpendicular directions.

Sensorn 4 är ansluten till ett registreringsorgan 5, som fortlöpande registrerar de av sensorn uppmätta egenfrekvensema.The sensor 4 is connected to a recording means 5, which continuously records the natural frequencies measured by the sensor.

I det visade diagrammet visar x- axeln respektive egenfrekvenser, heldragen kurva utan förare och streckad kurva med förare, medan y-axeln visar egenfrekvensemas amplítuder i volt (minsta kvadratrotsmetoden).In the diagram shown, the x-axis shows the respective natural frequencies, the solid curve without the driver and the dashed curve with the driver, while the y-axis shows the amplitudes of the natural frequencies in volts (least square root method).

För fastställande av den tid en förare suttit i förarstolen avlåser man den tid egenfrekvenser dämpats, t e x från cza x = 13,2 Hz/y = 0,82 V till x = 4,6 Hz/ y = 0,51 V. Givetvis måste hänsyn tagas till att en förare under sin vistelse på förarstolen kan vara belastad med föremål, som något förskjuter egenfrekvensen.To determine the time a driver has been in the driver 's seat, the time frequencies have been attenuated is locked, for example from cza x = 13.2 Hz / y = 0.82 V to x = 4.6 Hz / y = 0.51 V. Of course it is taken into account that a driver during his stay on the driver 's seat may be loaded with objects that slightly shift the natural frequency.

Claims (4)

1. 533 543 3 Patenth-av 1. Anordning för detektering av förarnärvaro i ßrarsäte (1) i farkost för ñrd till lands, sjöss eller i luften innefattande åtminstone en sensor (4), kännetecknad av att denna sensor (4) år inrättad att fortlöpande mäta frekvens och amplitud hos förarsátets (4) vibration i horisontalplanets båda riktningar varvid anordningen innefattar organ (5) för fortlöpande registrering av dâmpningen, d v s sänkningen av åtminstone en karaktäristisk resonansfrekvens och dess amplitud, vilken dämpning utgör indikation på förarnärvaro.A device for detecting the presence of a driver in a seat (1) in a land, sea or air vehicle comprising at least one sensor (4), characterized in that this sensor (4) is arranged to: continuously measuring the frequency and amplitude of the vibration of the driver seat (4) in both directions of the horizontal plane, the device comprising means (5) for continuously recording the attenuation, i.e. the lowering of at least one characteristic resonant frequency and its amplitude, which attenuation is indicative of driver presence. 2. Anordning enligt krav 1 , kánnetecknad av att sensorn (4) âr innesluten, skyddad i förarsätet (1).Device according to claim 1, characterized in that the sensor (4) is enclosed, protected in the driver's seat (1). 3. Anordning enligt krav 1 eller 2, kånnetecknad av att förarsätet (1) uppbârs av ett väsentligen centralt inrättat stödelement (2)-Device according to claim 1 or 2, characterized in that the driver's seat (1) is supported by a substantially centrally arranged support element (2) - 4. Sätt att detektera förarnârvaro i en anordning enligt något av krav 1 till 3, kännetecknat av att dâmpningen av åtminstone en egenfrekvens i förarsätet mäts och registreras dels utan förarnårvaro i förarsätet och dels vid förarnârvaro i det samma.Method for detecting driver presence in a device according to one of Claims 1 to 3, characterized in that the attenuation of at least one natural frequency in the driver's seat is measured and registered partly without a driver presence in the driver's seat and partly in the presence of a driver in the same.
SE0900490A 2009-04-14 2009-04-14 Device for detecting driver presence in vehicle SE533543C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE0900490A SE533543C2 (en) 2009-04-14 2009-04-14 Device for detecting driver presence in vehicle
PCT/SE2010/000095 WO2010120226A1 (en) 2009-04-14 2010-04-13 Device for the detection of the presence of a driver in a vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0900490A SE533543C2 (en) 2009-04-14 2009-04-14 Device for detecting driver presence in vehicle

Publications (2)

Publication Number Publication Date
SE0900490A1 SE0900490A1 (en) 2010-10-15
SE533543C2 true SE533543C2 (en) 2010-10-19

Family

ID=42982712

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0900490A SE533543C2 (en) 2009-04-14 2009-04-14 Device for detecting driver presence in vehicle

Country Status (2)

Country Link
SE (1) SE533543C2 (en)
WO (1) WO2010120226A1 (en)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6968263B1 (en) * 1993-11-23 2005-11-22 Peter Norton Vehicle occupant presence and position sensing system
WO1998014096A1 (en) * 1996-10-04 1998-04-09 Matsushita Electric Industrial Co., Ltd. Human body sensor for seat
JPH11510122A (en) * 1995-07-29 1999-09-07 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Vehicle seat occupancy type identification device
US6466849B2 (en) * 2000-03-21 2002-10-15 Honda Giken Kogyo Kabushiki Kaisha Occupant position detection system
WO2002002368A1 (en) * 2000-07-03 2002-01-10 Med-Dev Limited Method and apparatus for determining the presence and/or absence and/or a characteristic of an object on a support
US7333023B2 (en) * 2004-06-10 2008-02-19 Tk Holdings Inc. Occupant classification system and method
US7120527B2 (en) * 2004-11-08 2006-10-10 Delphi Technologies, Inc. Vehicle occupant characterization method based on the power spectrum of a seat sensor output signal
WO2007000022A1 (en) * 2005-06-28 2007-01-04 Allan Martin James Safety system and sensors therefor
EP1972487B1 (en) * 2005-12-28 2014-06-18 Delta Tooling Co., Ltd. Vehicle seat and vehicle seat evaluation method
EP2017139A1 (en) * 2007-07-17 2009-01-21 IEE International Electronics &amp; Engineering S.A.R.L. Occupant detection system for an automotive vehicle

Also Published As

Publication number Publication date
WO2010120226A1 (en) 2010-10-21
SE0900490A1 (en) 2010-10-15

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