WO2017026703A1 - Dispositif d'auto-détection de vitesse d'un véhicule à l'aide d'un élément piézoélectrique et procédé de détection associé - Google Patents

Dispositif d'auto-détection de vitesse d'un véhicule à l'aide d'un élément piézoélectrique et procédé de détection associé Download PDF

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Publication number
WO2017026703A1
WO2017026703A1 PCT/KR2016/008195 KR2016008195W WO2017026703A1 WO 2017026703 A1 WO2017026703 A1 WO 2017026703A1 KR 2016008195 W KR2016008195 W KR 2016008195W WO 2017026703 A1 WO2017026703 A1 WO 2017026703A1
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WO
WIPO (PCT)
Prior art keywords
speed
vehicle
piezoelectric element
frequency
bracket
Prior art date
Application number
PCT/KR2016/008195
Other languages
English (en)
Korean (ko)
Inventor
이태형
이재형
Original Assignee
주식회사 다음에너지
주식회사 하이젠에너지
이태형
이재형
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 주식회사 다음에너지, 주식회사 하이젠에너지, 이태형, 이재형 filed Critical 주식회사 다음에너지
Publication of WO2017026703A1 publication Critical patent/WO2017026703A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K31/00—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
    • G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values

Definitions

  • the present invention detects the vehicle's own speed with a piezoelectric element and analyzes and detects the detected signal.
  • GPS signals are detected by detecting and measuring the vehicle's own speed.
  • the method of receiving GPS signal is that the inertial navigation system detects the speed by calculating the change of time and the coordinates of the current position, and there is a problem that an error occurs because it is mainly used in the satellite navigation device, that is, the navigation.
  • the speedometer that detects the speed and displays the speed is installed on all vehicles as a speed indicator. The speedometer is expressed in km / h in Korea, Japan, and Germany, and mile / h in the United States. In most cases, the speed display error is ⁇ 5%, which is faster than the actual speed on the instrument panel.
  • the speedometer also includes a built-in speed meter with a totalizer indicating the total distance traveled. A car with an alarm device measures 100 km per hour.
  • Warnings are given by sound and light when they are exceeded.
  • the analogue method is to rotate the output shaft of the transmission from the worm gear. Uh oh it gigyejik out most often to induce the meter flexible shaft.
  • the present invention has been made to solve the above problems, using piezoelectric element, bracket, low pass filter and transmission ratio input device to analyze and process the detection signal to measure the speed of the vehicle and use it with various devices related to the speed of the vehicle. Convenience
  • the purpose is to improve.
  • the present invention also relates to vibration generated by the up and down movement of a piston inside a vehicle engine.
  • the present invention also aims to install the vehicle anywhere in the vehicle body without any deformation or disassembly so that the vehicle's speed information is available to various devices by detecting and measuring the speed of the vehicle.
  • the present invention is a bracket which is fixed to the vehicle body surface of the vehicle to deliver the vibration generated when the vehicle engine is driven to achieve the above object; the vibration is fixed to the bracket and transmitted through the bracket as a voltage signal Piezoelectric element for converting and outputting; Low-pass filter for removing the high frequency and noise from the voltage signal of the piezoelectric element and passing the low frequency; According to the gear shift of the vehicle
  • RPM rotational speed
  • the speed ratio input device may include a ratio of 3.214: 1 of each gear when the output of the engine generated from the crankshaft of the vehicle is converted into a driving force in the transmission.
  • the present invention (a) inputting the speed ratio of the vehicle from the speed ratio input unit to the speed measuring CPU; (b) detecting vibration of the vehicle and converting the frequency into a frequency in a piezoelectric element coupled to the bracket fixed to the vehicle; (c) passing the frequency converted from the piezoelectric element after filtering the low frequency band from the low pass filter, and (d) the speed measuring CPU samples the signal input from the low pass filter to measure the number of revolutions.
  • the present invention provides a method of detecting a vehicle's own speed using a piezoelectric element, which includes converting to a subsequent degree and outputting a speed value of the vehicle in comparison with the speed ratio input by the speed ratio input unit.
  • the vehicle body can be installed at any place of the vehicle body without deforming or disassembling, and for measuring brackets, piezoelectric elements, low pass filters and speed measurement.
  • the manufacturing cost according to the design and manufacture of the circuit including the CPU is low, and it can be easily applied to various devices using the vehicle speed information, and the accuracy and reliability of the device for detecting the vehicle's own speed are improved.
  • FIG. 1 is an embodiment according to the present invention, and shows the speed of a vehicle using a piezoelectric element.
  • FIG. 2 is an apparatus for detecting a vehicle's own speed using a piezoelectric element according to the present invention. The configuration diagram shown.
  • FIG. 3 is a flowchart illustrating a method of detecting a vehicle's own speed using a piezoelectric element according to the present invention.
  • the vibration signal of the vehicle is input to the low pass filter 30, and the low pass filter 30 inputs the baseband frequency to the speed measurement CPU 40 to sample the signal from the speed measurement CPU 40, and then the vehicle. Allows you to measure the engine speed (RPM).
  • the speed measurement CPU 40 converts the speed ratio input from the speed ratio input unit 50 of the vehicle so as to output the speed value.
  • the bracket 20 is fixedly mounted on the vehicle body surface to transmit vibrations generated when the vehicle engine is driven.
  • the bracket 20 is a vibration of the vehicle, i.e., a piston operating inside the engine. It is preferable to be mounted where it can easily detect the rotational vibration of the tank shaft by the undressing movement, but it can be mounted anywhere that can detect the vibration generated after the vehicle starts up.
  • the piezoelectric element 10 is fixedly coupled to the bra 3 ⁇ 4 (20) to provide vibrations transmitted through the bracket.
  • the piezoelectric element 10 represents a piezoelectric phenomenon and is called a piezoelectric element.
  • the piezoelectric element is mainly used for crystal, tourmaline or Rochelle salt. Recently, barium titanate, ammonium dihydrogen phosphate, ethylene diartarate, etc., which have excellent piezoelectricity by artificial crystals, are used. .
  • the low pass filter 30 has a high frequency in the voltage signal of the piezoelectric element 10.
  • the low pass filter 30 is a filter for passing the low part of the frequency. Therefore, the low pass filter 30 attenuates and cuts the frequency above a certain frequency except for a freely passable frequency pass. Furthermore, in the pulse code modulation (PCM) method, the analog signal is sampled at a constant sampling period to digitize the sampling again. In this case, it is a low-pass filter used to suppress the generation of noise by aliasing by blocking components with frequencies exceeding half of the sampling frequency included in the input analog signal.
  • PCM pulse code modulation
  • the speed ratio input device 50 is configured to determine the number of revolutions of the wheels according to the gear shift of the vehicle.
  • the gear ratio is the ratio of the engine speed to the speed of the propulsion or transmission spindle, that is, the ratio of the speed of the transmission input shaft to the speed of the output shaft, and the gear ratio according to the gear position. At low speeds with small rotational power but high driving force, the gear ratio is high, and at high speeds with high rotational power and small driving force, the gear ratio is small. Furthermore, the gear ratio is expressed as a value such as 3.214: 1 or 3.214 in simple terms. If the engine speed is 3,000rpm, the propeller shaft speed is 1,000rpm and the speed is decelerated by 1/3, and the speed of the wheel is decelerated once again by the differential gear and becomes less than 1,000rpm. The final reduction ratio.
  • the speed measuring CPU 40 has a low pass and the rotation speed input from the speed ratio input device 50.
  • the low frequency frequency input from the filter 30 is converted into the speed of the vehicle according to the gear shift.
  • the speed measurement CPU 40 has a rotational speed (RPM) so as to be consistent in converting the speed according to the gear shift of the vehicle.
  • the speed ratio is input from a speed ratio input unit 50 capable of contrasting the rotational speed of the contrast wheel.
  • the speed measurement CPU 40 determines the speed ratio after the vehicle is started.
  • the speed ratio of the vehicle is input from the input device 50 (S11). At this time, when the vehicle does not move, the speed ratio value is not generated in the speed ratio input device 50, and the speed value of the vehicle is output from the speed measurement CPU 40. It doesn't work.
  • the vibration of the vehicle is detected by the piezoelectric element 10 coupled to the bracket 20 fixed to the vehicle (S12).
  • the piezoelectric element 10 detects the vibration of the vehicle as a frequency signal.
  • the frequency converted by the piezoelectric element 10 is outputted through the signal line 21 to the low pass filter 30, and then low pass.
  • the filter 30 filters the baseband among the input frequencies and then passes the signal (S14).
  • the speed measuring CPU 40 passes the signal input from the low pass filter 30.
  • step S15 the speed measurement CPU 40 samples the input signal with the value taken out at discrete time points.
  • the speed measurement CPU 40 measures the rotational speed (RPM) from the sampled signal. Then, the speed measurement CPU 40 converts the measured rotation speed into the speed (S17), and compares the speed of the vehicle with the speed ratio input from the speed ratio input device 50. Output the speed value (SI 8).
  • the method for detecting the vehicle's own speed using the piezoelectric element of the present invention converts and analyzes the vibration frequency of the vehicle and the transmission ratio signal of the vehicle input from the speed ratio input unit in the piezoelectric element coupled to the bracket in the speed measuring CPU. And by outputting the vehicle's own speed by processing, there is an advantage to improve the utilization of various devices that use the speed of the vehicle.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Control Of Transmission Device (AREA)

Abstract

La présente invention concerne un dispositif d'auto-détection de la vitesse d'un véhicule qui détecte automatiquement la vitesse d'un véhicule à l'aide d'un élément piézoélectrique puis analyse et traite un signal détecté de façon à mesurer la vitesse du véhicule, ainsi qu'un procédé de détection associé, ledit dispositif comprenant : un support monté de manière fixe sur la surface d'une carrosserie de véhicule de manière à transmettre les vibration générées lorsqu'un moteur du véhicule est entraîné ; un élément piézoélectrique qui est couplé de manière fixe au support pour convertir les vibrations transmises à travers le support en un signal de tension de manière à délivrer en sortie ledit signal de tension ; un filtre de fréquence passe-bas permettant d'éliminer les hautes fréquences et le bruit du signal de tension de l'élément piézoélectrique et de laisser passer les basses fréquences ; une unité d'entrée de rapport de transmission qui fournit un rapport de transmission afin de comparer le nombre de tours (RPM) de la roue avec le nombre de tours correspondant à un rapport de transmission du véhicule ; et une unité centrale de mesure de vitesse qui convertit le nombre de tours entré par l'unité d'entrée de rapport de transmission ainsi que les basses fréquences entrées par le filtre de fréquence passe-bas en une vitesse du véhicule correspondant au rapport de transmission, de manière à délivrer en sortie ladite vitesse. La présente invention permet d'installer un dispositif capable de détecter automatiquement la vitesse d'un véhicule au niveau d'une position souhaitée sur une carrosserie de véhicule sans déformer ou démonter ledit véhicule et permet de réduire le coût de fabrication et de conception d'un circuit comprenant un support, un élément piézoélectrique, un filtre de fréquence passe-bas et une unité centrale de mesure de vitesse, peut être facilement appliquée à divers dispositifs utilisant les informations de vitesse du véhicule et améliore la précision et la fiabilité d'un dispositif de détection.
PCT/KR2016/008195 2015-08-11 2016-07-27 Dispositif d'auto-détection de vitesse d'un véhicule à l'aide d'un élément piézoélectrique et procédé de détection associé WO2017026703A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020150113443A KR101598588B1 (ko) 2015-08-11 2015-08-11 압전소자를 이용한 차량의 자체 속도 감지장치 및 그 감지방법
KR10-2015-0113443 2015-08-11

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WO2017026703A1 true WO2017026703A1 (fr) 2017-02-16

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WO (1) WO2017026703A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101963323B1 (ko) * 2017-02-27 2019-07-31 대한민국 차량의 속도 추정 방법 및 시스템

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS545477A (en) * 1977-06-13 1979-01-16 Matsushita Electric Ind Co Ltd Measuring method of resistance toruqe of pivot bearings and apparatus for the same
JPS60222775A (ja) * 1984-04-20 1985-11-07 Automob Antipollut & Saf Res Center デイ−ゼルエンジン回転検出装置
JPH01265163A (ja) * 1988-04-18 1989-10-23 Honda Motor Co Ltd エンジン回転数計測装置
JPH0463067U (fr) * 1990-10-12 1992-05-29
KR101504344B1 (ko) * 2014-01-23 2015-03-30 주식회사 유시스 회전수 측정 알고리즘, 회전수 측정 장치, 및 회전수 측정 방법

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS555477A (en) * 1978-06-28 1980-01-16 Okuda Koki Kk Revolution-speed measuring method for diesel engine
JP3099580B2 (ja) * 1992-12-01 2000-10-16 ヤマハ株式会社 電子ドラム
KR20000026424A (ko) 1998-10-20 2000-05-15 정우경 문자-음성 변환을 이용한 음성 메시지 서비스 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS545477A (en) * 1977-06-13 1979-01-16 Matsushita Electric Ind Co Ltd Measuring method of resistance toruqe of pivot bearings and apparatus for the same
JPS60222775A (ja) * 1984-04-20 1985-11-07 Automob Antipollut & Saf Res Center デイ−ゼルエンジン回転検出装置
JPH01265163A (ja) * 1988-04-18 1989-10-23 Honda Motor Co Ltd エンジン回転数計測装置
JPH0463067U (fr) * 1990-10-12 1992-05-29
KR101504344B1 (ko) * 2014-01-23 2015-03-30 주식회사 유시스 회전수 측정 알고리즘, 회전수 측정 장치, 및 회전수 측정 방법

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