WO2021118215A1 - Module for using, in sound wave communication, parking assist sensor (pas) or smart parking assist system (spas) - Google Patents

Module for using, in sound wave communication, parking assist sensor (pas) or smart parking assist system (spas) Download PDF

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Publication number
WO2021118215A1
WO2021118215A1 PCT/KR2020/017895 KR2020017895W WO2021118215A1 WO 2021118215 A1 WO2021118215 A1 WO 2021118215A1 KR 2020017895 W KR2020017895 W KR 2020017895W WO 2021118215 A1 WO2021118215 A1 WO 2021118215A1
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Prior art keywords
parking assist
signal
module
sound wave
voltage signal
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PCT/KR2020/017895
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French (fr)
Korean (ko)
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조원기
류제인
김동환
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주식회사 원키
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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/01—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
    • G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
    • G07C2009/00801—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means by acoustic waves

Definitions

  • the present invention relates to a vehicle opening/closing system for a vehicle, that is, a smart key system.
  • a vehicle opening/closing system for a vehicle that is, a smart key system.
  • it relates to a system that opens and closes the vehicle based on the sound wave generated by the vehicle reaching the driver's smartphone operated by the smart key of the vehicle.
  • the vehicle opening/closing system using radio communication which is currently generally applied, has a weakness in that it is vulnerable to radio wave hacking such as a relay station attack. In addition, it is difficult to open and close the car door with only a smartphone, and it is inconvenient to carry a keypop separately.
  • a system that opens and closes a vehicle using sound wave communication based on a parking assist sensor (PAS) or a smart parking assist system (SPAS) existing in an existing vehicle for easy installation is required. do.
  • PAS parking assist sensor
  • SPAS smart parking assist system
  • PAS parking assistance sensor
  • SPAS smart parking assistance system
  • the present invention provides a signal for generating a voltage signal having a preset frequency in a module for using a parking assistance sensor (PAS) or a smart parking assistance system (SPAS) provided in a vehicle for sound wave communication It includes a generator, a voltage amplifier that amplifies the voltage signal and transmits it to the parking assist sensor or smart parking assist system, and a controller for controlling the generation of the voltage signal, wherein the parking assist sensor or smart parking assist system receives the voltage signal by the module.
  • PAS parking assistance sensor
  • SPAS smart parking assistance system
  • the present invention provides a signal for generating a voltage signal having a preset frequency in a module for using a parking assistance sensor (PAS) or a smart parking assistance system (SPAS) provided in a vehicle for sound wave communication It includes a generator, a voltage amplifier that amplifies the voltage signal and transmits it to the parking assist sensor or smart parking assist system, and a controller for controlling the generation of the voltage signal, wherein the parking assist sensor or smart parking assist system receives the voltage signal by
  • the present invention it is possible to open and close a vehicle using sound wave communication based on an existing parking assistance sensor (PAS) or a smart parking assistance system (SPAS).
  • PAS parking assistance sensor
  • SPAS smart parking assistance system
  • FIG. 1 is a diagram schematically illustrating sound wave communication according to an embodiment of the present invention.
  • FIG. 2 is a flowchart illustrating a method for outputting a sound wave signal according to an embodiment of the present invention.
  • a signal generator for generating a voltage signal having a preset frequency
  • a voltage amplifying unit for amplifying the voltage signal and transmitting it to the parking assist sensor or smart parking assist system
  • a control unit for controlling the generation of the voltage signal
  • the parking assist sensor or smart parking assist system module characterized in that the output of the voltage signal as a sound wave signal by the module.
  • the distance between the vehicle and the mobile device 2 is measured by generating a sound wave signal (SW) through a speaker mounted on the vehicle, receiving the sound wave signal (SW) from a mobile device (2) such as a smartphone and measuring its strength can be calculated
  • SW sound wave signal
  • the distance can be calculated using an increase in signal strength as the distance between the mobile device 2 and the vehicle gets closer, and a plurality of sound waves using a plurality of speakers
  • Heron's formula is a formula to find the area through the lengths of three sides of a triangle.
  • FIG 1 schematically illustrates sound wave communication according to the present invention.
  • a signal generation command is transmitted to the wireless communication unit through wireless communication from the mobile device 2 in which the application for managing signal generation is installed.
  • the wireless communication unit transmits the signal generation command to the module 1 according to the present invention, and the module 1 according to the present invention generates a signal accordingly to a parking assistance sensor (PAS) or a smart parking assistance system (SPAS)
  • PAS parking assistance sensor
  • SPAS smart parking assistance system
  • a sound wave is output through a piezo sensor included in a parking assistance sensor (PAS) or a smart parking assistance system (SPAS).
  • the piezo sensor included in the parking assistance sensor or the smart parking assistance system is optimized to generate a sound wave of 40 to 60 kHz for the straightness of the sound wave.
  • the reception frequency range of the mounted microphone is generally 24 kHz or less, so it is required to lower the frequency.
  • the output of the piezo sensor is low at such a low frequency, a configuration for increasing the input voltage is required.
  • the module 1 includes a signal generating unit 11 , a voltage amplifying unit 12 , and a control unit 13 .
  • the control unit 13 is configured to control the generation of the voltage signal ES.
  • the control unit 13 causes the signal generation unit 11 to generate a signal according to the signal generation command received from the wireless communication unit, and records the transmission/reception time of the signal generation command. These timestamps are finally transferred to the mobile device 2 to be used for positioning calculations.
  • the signal generator 11 is configured to generate a voltage signal ES to be used for sound wave communication.
  • the voltage signal ES is an electrical signal that is converted into a sound wave signal SW to be output from the piezo sensor and output.
  • the signal generator 11 receives a signal generation command having a predetermined frequency, a start time, a duration, and a repetition period determined in advance from the controller 13 and generates a signal.
  • a frequency tuning unit connected to the signal generator 11 is provided to generate a plurality of voltage signals ES at the same time to generate a plurality of different voltage signals ES from the voltage signal ES or , by being provided with a plurality of signal generators, it is possible to generate a plurality of voltage signals ES.
  • the voltage amplifying unit 12 may be provided.
  • the voltage amplifying unit 12 is configured to amplify the magnitude of the signal before being transmitted to the parking assistance sensor or the smart parking assistance system.
  • the voltage signal ES is amplified 5 to 20 times by the voltage amplifier 12 .
  • a frequency matching unit 14 may be further provided.
  • the frequency matching unit 14 is configured to match the resonance frequency of the circuit including the parking assistance sensor (PAS) or the smart parking assistance system (SPAS) with the frequency of the voltage signal (ES). This is due to the fact that the resonant frequency (40 kHz to 60 kHz) of a circuit including a parking assistance sensor (PAS) or a smart parking assistance system (SPAS) does not match the frequency of the voltage signal (ES) (approximately 20 kHz). This is to match the output because the output is lowered.
  • the frequency matching unit 14 may be an adjustable capacitor (capacitor) and an inductor (inductor).
  • SW sound wave signal
  • Signal generation step (s11) is a step of generating a voltage signal (ES) to be converted into a sound wave signal (SW) in the parking assistance sensor or smart parking assistance system. This is implemented by generating a signal with a predetermined frequency, start time, duration, and repetition period in the signal generator 11 .
  • the signal amplifying step (s12) is a step of amplifying the amplitude of the voltage signal (ES) generated in the signal generating step (s11). As described above, the voltage amplifying unit 12 amplifies the voltage signal ES by 5 to 20 times.
  • the frequency matching step (s13) is a step of matching the resonance frequency of the circuit including the parking assistance sensor (PAS) or the smart parking assistance system (SPAS) with the frequency of the voltage signal (ES).
  • the frequency matching step (s13) is not necessarily performed after the signal generating step (s11) and the signal amplifying step (s12), but may be simultaneously performed in parallel.
  • the control unit 13 uses the parking assist sensor or the smart parking assist system for the parking assist purpose. It may be provided to enable switching between the first mode and the second mode for use in sound wave communication.
  • the control unit 13 When set to the second mode, the control unit 13 transmits a command for generating the voltage signal ES to the signal generator 11 , and when set to the first mode, the voltage signal to the signal generator 11 . Sends a command to stop the occurrence of (ES). Accordingly, the parking assist sensor or smart parking assist system can be used for two purposes, and the configuration installed in the vehicle is reduced, thereby reducing costs.
  • the entire system including the module 1 and the wireless communication unit operates in synchronization with time.
  • only the module 1 and the wireless communication unit are time-synchronized and may not be time-synchronized with the mobile device 2 .
  • the time data that can be collected from the mobile device 2 or the vehicle is a time of wireless communication at which a sound wave transmission command is transmitted and received, and there is a time delay from the actual sound wave transmission time point. This is not a phenomenon in which the speed of communication itself is delayed, but a delay required to transmit a command from the mobile device 2 to the wireless communication unit.
  • the processor of the driver's mobile device 2 is multi-core instead of a single core, the same command is sent to the same command every time. It is understood that this is a phenomenon that occurs because memory and performance cannot be allocated. This delay causes problems in the distance measurement algorithm because two devices with different time axes cannot be synchronized.
  • the problem caused by the delay can be solved. Since sound waves are transmitted from each channel of all vehicles with one wireless communication command, the absolute delay of all piezo sensors is the same. That is, there is no difference in delay between the sound wave signals SW transmitted from each piezo sensor.
  • the module 1 may be installed in a vehicle and connected to a vehicle opening/closing system for opening and closing a door of the vehicle.
  • the vehicle opening/closing system is connected to the user's mobile device 2 through wireless communication, and the mobile device 2 receives the sound wave signal SW output from the parking assistance sensor or smart parking assistance system. and, based on the strength and arrival time of the received sound wave signal SW, it is possible to determine whether the mobile device 2 enters within a preset reference distance from the vehicle.
  • the driver can open and close the vehicle door by carrying only the mobile device 2 without carrying a separate keypop, and the vehicle such as relay hacking attack (RSA) Theft is prevented.
  • SW sound wave signal
  • RSA relay hacking attack
  • this module 1 can be applied to a smart door lock system in addition to a vehicle.
  • the present invention it is possible to open and close a vehicle using sound wave communication based on an existing parking assistance sensor (PAS) or a smart parking assistance system (SPAS).
  • PAS parking assistance sensor
  • SPAS smart parking assistance system

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lock And Its Accessories (AREA)

Abstract

The present invention provides a module for using, in sound wave communication, a parking assist sensor (PAS) or a smart parking assist system (SPAS) provided in a vehicle, the module comprising: a signal generation unit for generating a voltage signal having a preset frequency; a voltage amplification unit for amplifying the voltage signal and transmitting same to the PAS or the SPAS; and a control unit for controlling the generation of the voltage signal, wherein the PAS or the SPAS outputs the voltage signal as a sound wave signal by means of the module. The present invention can open/close a vehicle by using sound wave communication performed on the basis of a conventional PAS or SPAS, is not hacked, in comparison to a communication system using sound wave communication, so as to maximize security, and can remarkably reduce costs since application to a conventional vehicle can be easily performed.

Description

주차 보조 센서(PAS) 또는 스마트 주차 보조 시스템(SPAS)을 음파 통신에 이용하기 위한 모듈Module for using Parking Assist Sensor (PAS) or Smart Parking Assist System (SPAS) for sonic communication
본 발명은 자동차의 차량 개폐 시스템, 즉, 스마트 키 시스템에 관한 것이다. 보다 자세하게는 자동차에서 발생시킨 음파가 자동차의 스마트 키로 동작하는 운전자의 스마트폰에 도달하면 이를 기초로 차량을 개폐하는 시스템에 관한 것이다.The present invention relates to a vehicle opening/closing system for a vehicle, that is, a smart key system. In more detail, it relates to a system that opens and closes the vehicle based on the sound wave generated by the vehicle reaching the driver's smartphone operated by the smart key of the vehicle.
현재 일반적으로 적용되고 있는 전파 통신을 사용한 자동차 개폐 시스템은 릴레이 스테이션 어택과 같은 전파 해킹에 취약하다는 약점을 가지고 있다. 또한, 스마트폰 만으로는 자동차 문을 여닫는 것이 어렵고 키폽을 별도로 가지고 다녀야 하는 불편함이 있다.The vehicle opening/closing system using radio communication, which is currently generally applied, has a weakness in that it is vulnerable to radio wave hacking such as a relay station attack. In addition, it is difficult to open and close the car door with only a smartphone, and it is inconvenient to carry a keypop separately.
이러한 전파 통신 시스템의 한계를 극복하기 위해 암호화된 음파와 스마트폰을 활용하는 방법이 개발중이다. 이때 활용되는 알고리즘으로 블루투스 통신과 음파 통신의 시간차를 통한 차량과 스마트폰 간의 거리를 측위하는 방법이 있다.In order to overcome the limitations of this radio communication system, a method using encrypted sound waves and a smartphone is being developed. As an algorithm used at this time, there is a method of determining the distance between the vehicle and the smartphone through the time difference between Bluetooth communication and sound wave communication.
특히, 설치가 간편하도록 기존 차량에 존재하는 주차 보조 센서(PAS, parking assist sensor)또는 스마트 주차 보조 시스템(SPAS, smart parking assis system) 등을 기초로 음파 통신을 이용하여 차량을 개폐하는 시스템이 요구된다.In particular, a system that opens and closes a vehicle using sound wave communication based on a parking assist sensor (PAS) or a smart parking assist system (SPAS) existing in an existing vehicle for easy installation is required. do.
이 시스템은 스마트폰과 자동차에 설치된 통신장치 간의 블루투스 통신이 연결되면 스마트폰에서 특정 주파수, 길이, 부호와 같은 음파에 대한 정보를 통신장치로 전달하고 통신장치에서 해당 음파 생성을 명령하여, 자동차에 부착된 PAS, SPAS의 피에조 센서, 혹은 자체 설치한 컴팩트 모듈의 스피커를 통해 발생된 음파를 스마트폰 마이크로 측정하여 차량과 사용자 간의 거리 및 위치 등을 판별한 후 차량의 개폐를 결정하는 형태를 가진다.In this system, when Bluetooth communication between the smartphone and the communication device installed in the car is connected, information about sound waves such as a specific frequency, length, and sign is transmitted from the smartphone to the communication device, and the communication device commands the generation of the sound wave, The sound wave generated through the attached PAS, the piezo sensor of the SPAS, or the speaker of the self-installed compact module is measured with a smartphone microphone to determine the distance and location between the vehicle and the user, and then decides to open or close the vehicle.
[선행기술문헌][Prior art literature]
[특허문헌][Patent Literature]
대한민국 공개특허 제10-2018-0115783호 (2018년 10월 23일 공개)Republic of Korea Patent Publication No. 10-2018-0115783 (published on October 23, 2018)
본 발명의 기술적 과제는 주차 보조 센서(PAS) 또는 스마트 주차 보조 시스템(SPAS)을 기초로 음파 통신을 이용하여 차량을 개폐하는 시스템을 제공하는 것이다.It is an object of the present invention to provide a system for opening and closing a vehicle using sound wave communication based on a parking assistance sensor (PAS) or a smart parking assistance system (SPAS).
상기한 과제를 해결하기 위해 본 발명은 차량에 구비된 주차 보조 센서(PAS) 또는 스마트 주차 보조 시스템(SPAS)을 음파 통신에 이용하기 위한 모듈에 있어서, 미리 설정된 주파수를 갖는 전압 신호를 발생시키는 신호 발생부, 전압 신호를 증폭하여 주차 보조 센서 또는 스마트 주차 보조 시스템으로 전송하는 전압 증폭부 및 전압 신호의 발생을 제어하는 제어부를 포함하고, 주차 보조 센서 또는 스마트 주차 보조 시스템은 모듈에 의해 전압 신호를 음파 신호로 출력하는 모듈을 제공한다.In order to solve the above problems, the present invention provides a signal for generating a voltage signal having a preset frequency in a module for using a parking assistance sensor (PAS) or a smart parking assistance system (SPAS) provided in a vehicle for sound wave communication It includes a generator, a voltage amplifier that amplifies the voltage signal and transmits it to the parking assist sensor or smart parking assist system, and a controller for controlling the generation of the voltage signal, wherein the parking assist sensor or smart parking assist system receives the voltage signal by the module. Provides a module that outputs sound wave signals.
본 발명에 따르면 기존의 주차 보조 센서(PAS) 또는 스마트 주차 보조 시스템(SPAS)을 기초로 음파 통신을 이용하여 차량을 개폐할 수 있다.According to the present invention, it is possible to open and close a vehicle using sound wave communication based on an existing parking assistance sensor (PAS) or a smart parking assistance system (SPAS).
또한, 본 발명에 따르면 전파 통신을 이용한 통신 시스템 대비 해킹당하지 않아 보안성을 극대화할 수 있다.In addition, according to the present invention, compared to a communication system using radio wave communication, it is not hacked, and security can be maximized.
또한, 본 발명에 따르면 기존 차량에 용이하게 적용할 수 있어, 현저한 비용 절감이 가능하다.In addition, according to the present invention, it can be easily applied to an existing vehicle, so that a significant cost reduction is possible.
도 1은 본 발명의 일 실시예에 따른 음파 통신을 간략하게 나타내는 도면이다.1 is a diagram schematically illustrating sound wave communication according to an embodiment of the present invention.
도 2는 본 발명의 일 실시예에 따른 음파 신호 출력 방법을 나타내는 순서도이다.2 is a flowchart illustrating a method for outputting a sound wave signal according to an embodiment of the present invention.
차량에 구비된 주차 보조 센서(PAS) 또는 스마트 주차 보조 시스템(SPAS)을 음파 통신에 이용하기 위한 모듈에 있어서,In a module for using a parking assistance sensor (PAS) or a smart parking assistance system (SPAS) provided in a vehicle for sound wave communication,
미리 설정된 주파수를 갖는 전압 신호를 발생시키는 신호 발생부;a signal generator for generating a voltage signal having a preset frequency;
상기 전압 신호를 증폭하여 상기 주차 보조 센서 또는 스마트 주차 보조 시스템으로 전송하는 전압 증폭부; 및a voltage amplifying unit for amplifying the voltage signal and transmitting it to the parking assist sensor or smart parking assist system; and
상기 전압 신호의 발생을 제어하는 제어부;를 포함하고,Including; a control unit for controlling the generation of the voltage signal;
상기 주차 보조 센서 또는 스마트 주차 보조 시스템은 상기 모듈에 의해 상기 전압 신호를 음파 신호로 출력하는 것을 특징으로 하는 모듈.The parking assist sensor or smart parking assist system module, characterized in that the output of the voltage signal as a sound wave signal by the module.
이하, 첨부된 도면을 참조하여 본 발명의 실시 예에 대하여 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 상세히 설명한다. 그러나 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며 이하에서 개시되는 실시 예에 한정되지 않는다. 또한 도면에서 본 발명을 명확하게 개시하기 위해서 본 발명과 관계없는 부분은 생략하였으며, 도면에서 동일하거나 유사한 부호들은 동일하나 유사한 구성요소들을 나타낸다.Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily implement them. However, the present invention may be implemented in several different forms and is not limited to the embodiments disclosed below. In addition, in order to clearly disclose the present invention in the drawings, parts irrelevant to the present invention are omitted, and the same or similar symbols in the drawings indicate the same but similar components.
본 발명의 목적 및 효과는 하기의 설명에 의해서 자연스럽게 이해되거나 보다 분명해질 수 있으며, 하기의 기재만으로 본 발명의 목적 및 효과가 제한되는 것은 아니다.Objects and effects of the present invention can be naturally understood or made clearer by the following description, and the objects and effects of the present invention are not limited only by the following description.
본 발명의 목적, 특징 및 장점은 다음의 상세한 설명을 통하여 보다 분명해질 것이다. 또한, 본 발명을 설명함에 있어서 본 발명과 관련된 공지 기술에 대한 구체적인 설명이, 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우에는 그 상세한 설명을 생략하기로 한다. 이하, 첨부된 도면을 참조하여 본 발명에 따른 실시예를 상세히 설명하기로 한다.The objects, features and advantages of the present invention will become more apparent from the following detailed description. In addition, in the description of the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.
차량에 장착된 스피커를 통해 음파 신호(SW)를 발생하여, 스마트폰과 같은 모바일 장치(2)에서 상기 음파 신호(SW)를 수신하여 그 강도를 측정함으로써 차량과 모바일 장치(2) 간의 거리를 계산할 수 있다. 단일 음파 신호(SW)를 사용하는 경우 모바일 장치(2)와 차량간 거리가 가까워짐에 따라 신호의 강도가 증가하는 것을 이용해서 거리를 계산할 수 있으며, 복수의 스피커(speaker)를 사용하여 복수의 음파 신호(SW)를 사용하는 경우 ToA(Time of Arrival) 또는 TDoA(Time Difference of Arrival)을 기초로 헤론의 공식을 이용한 삼각 측량을 통해 계산될 수 있다. 여기서, 헤론의 공식은 삼각형의 세 변의 길이를 통해 넓이를 구하는 공식이다.The distance between the vehicle and the mobile device 2 is measured by generating a sound wave signal (SW) through a speaker mounted on the vehicle, receiving the sound wave signal (SW) from a mobile device (2) such as a smartphone and measuring its strength can be calculated When a single sound wave signal (SW) is used, the distance can be calculated using an increase in signal strength as the distance between the mobile device 2 and the vehicle gets closer, and a plurality of sound waves using a plurality of speakers When the signal SW is used, it may be calculated through triangulation using Heron's formula based on Time of Arrival (ToA) or Time Difference of Arrival (TDoA). Here, Heron's formula is a formula to find the area through the lengths of three sides of a triangle.
도 1은 본 발명에 따른 음파 통신을 간략하게 나타낸 것이다.1 schematically illustrates sound wave communication according to the present invention.
신호 발생을 관리하는 어플리케이션이 설치된 모바일 장치(2)로부터 무선통신을 통해 무선통신부에 신호 발생 명령이 전송된다. 무선통신부는 본 발명에 따른 모듈(1)에 상기 신호 발생 명령을 전달하게 되고, 본 발명에 따른 모듈(1)이 이에 따라 신호를 발생시켜 주차 보조 센서(PAS) 또는 스마트 주차 보조 시스템(SPAS)에 전송하며, 주차 보조 센서(PAS) 또는 스마트 주차 보조 시스템(SPAS)에 포함된 피에조(piezo) 센서를 통해 음파가 출력된다.A signal generation command is transmitted to the wireless communication unit through wireless communication from the mobile device 2 in which the application for managing signal generation is installed. The wireless communication unit transmits the signal generation command to the module 1 according to the present invention, and the module 1 according to the present invention generates a signal accordingly to a parking assistance sensor (PAS) or a smart parking assistance system (SPAS) A sound wave is output through a piezo sensor included in a parking assistance sensor (PAS) or a smart parking assistance system (SPAS).
일반적으로 주차 보조 센서 또는 스마트 주차 보조 시스템에 포함된 상기 피에조 센서는 음파의 직진성을 위해서, 40 내지 60kHz의 음파 발생에 최적화되어 있다. 하지만 스마트폰과 같은 모바일 장치(2)의 경우 장착되는 마이크의 수신 주파수 범위는 일반적으로 24kHz 이하이므로 주파수를 낮추는 것이 요구된다. 또한 이러한 낮은 주파수에서 피에조 센서의 출력이 낮아지기 때문에 입력 전압을 높여주기 위한 구성이 요구된다.In general, the piezo sensor included in the parking assistance sensor or the smart parking assistance system is optimized to generate a sound wave of 40 to 60 kHz for the straightness of the sound wave. However, in the case of the mobile device 2 such as a smartphone, the reception frequency range of the mounted microphone is generally 24 kHz or less, so it is required to lower the frequency. In addition, since the output of the piezo sensor is low at such a low frequency, a configuration for increasing the input voltage is required.
본 발명에 따르면 모듈(1)은 신호 발생부(11), 전압 증폭부(12) 및 제어부(13)를 포함한다.According to the present invention, the module 1 includes a signal generating unit 11 , a voltage amplifying unit 12 , and a control unit 13 .
제어부(13)는 전압 신호(ES)의 발생을 제어하기 위한 구성이다. 상세하게, 제어부(13)는 상기 무선통신부로부터 전달받은 신호 발생 명령에 따라 신호 발생부(11)로 하여금 신호를 발생하도록 하고, 상기 신호 발생 명령의 송수신 시간을 기록한다. 이러한 시간 기록들은 최종적으로 모바일 장치(2)로 전달되어 측위 계산에 사용될 수 있다.The control unit 13 is configured to control the generation of the voltage signal ES. In detail, the control unit 13 causes the signal generation unit 11 to generate a signal according to the signal generation command received from the wireless communication unit, and records the transmission/reception time of the signal generation command. These timestamps are finally transferred to the mobile device 2 to be used for positioning calculations.
신호 발생부(11)는 음파 통신에 사용될 전압 신호(ES)를 발생하는 구성이다. 전압 신호(ES)는 피에조 센서에서 출력될 음파 신호(SW)로 변환되어 출력되는 전기적 신호이다. 상세하게, 신호 발생부(11)는 제어부(13)로부터 미리 지정된 주파수, 시작 시간, 지속 시간 및 반복 주기가 정해진 신호의 발생 명령을 전달받아 신호를 발생시킨다. 바람직하게, 복수의 전압 신호(ES)를 동시에 발생할 수 있도록 상기 신호 발생부(11)에 연결되는 주파수 튜닝부가 구비되어 상기 전압 신호(ES)로부터 서로 다른 복수의 전압 신호(ES)를 발생시키거나, 복수의 신호발생부로 구비됨으로써 복수의 전압 신호(ES)를 발생시킬 수 있다.The signal generator 11 is configured to generate a voltage signal ES to be used for sound wave communication. The voltage signal ES is an electrical signal that is converted into a sound wave signal SW to be output from the piezo sensor and output. In detail, the signal generator 11 receives a signal generation command having a predetermined frequency, a start time, a duration, and a repetition period determined in advance from the controller 13 and generates a signal. Preferably, a frequency tuning unit connected to the signal generator 11 is provided to generate a plurality of voltage signals ES at the same time to generate a plurality of different voltage signals ES from the voltage signal ES or , by being provided with a plurality of signal generators, it is possible to generate a plurality of voltage signals ES.
신호 발생부(11)에서 발생시킨 전압 신호(ES)는 크기(Amplitude)가 작으므로 증폭이 필요하다. 따라서, 전압 증폭부(12)가 구비될 수 있다. 전압 증폭부(12)는 주차 보조 센서 또는 스마트 주차 보조 시스템에 전송되기전에 신호의 크기를 증폭시키는 구성이다. 일 실시예에 따라, 상기 전압 신호(ES)는 전압 증폭부(12)를 통해 5배 내지 20배 증폭된다.Since the voltage signal ES generated by the signal generator 11 has a small amplitude, amplification is required. Accordingly, the voltage amplifying unit 12 may be provided. The voltage amplifying unit 12 is configured to amplify the magnitude of the signal before being transmitted to the parking assistance sensor or the smart parking assistance system. According to an exemplary embodiment, the voltage signal ES is amplified 5 to 20 times by the voltage amplifier 12 .
바람직한 실시예로서, 주파수 매칭부(14)가 더 구비될 수 있다. 주파수 매칭부(14)는 주차 보조 센서(PAS) 또는 스마트 주차 보조 시스템(SPAS)이 포함된 회로의 공진(resonance) 주파수를 상기 전압 신호(ES)의 주파수와 매칭시키는 구성이다. 이는 주차 보조 센서(PAS) 또는 스마트 주차 보조 시스템(SPAS)이 포함된 회로가 일반적으로 갖는 공진 주파수(40 kHz 내지 60 kHz) 와 상기 전압 신호(ES)의 주파수(약 20 kHz)가 일치하지 않기 때문에 출력이 낮아지기 때문에 이를 매칭시키기 위함이다. 일 실시예로서, 주파수 매칭부(14)는 조절 가능한 커페시터(capacitor) 및 인덕터(inductor)일 수 있다. 주파수 매칭부(14)에 의해 공진 주파수가 매칭됨으로써 주차 보조 센서(PAS) 또는 스마트 주차 보조 시스템(SPAS)를 통해 원하는 출력으로 음파 신호(SW)를 발생시킬 수 있다.As a preferred embodiment, a frequency matching unit 14 may be further provided. The frequency matching unit 14 is configured to match the resonance frequency of the circuit including the parking assistance sensor (PAS) or the smart parking assistance system (SPAS) with the frequency of the voltage signal (ES). This is due to the fact that the resonant frequency (40 kHz to 60 kHz) of a circuit including a parking assistance sensor (PAS) or a smart parking assistance system (SPAS) does not match the frequency of the voltage signal (ES) (approximately 20 kHz). This is to match the output because the output is lowered. In one embodiment, the frequency matching unit 14 may be an adjustable capacitor (capacitor) and an inductor (inductor). By matching the resonant frequency by the frequency matching unit 14, it is possible to generate a sound wave signal SW with a desired output through a parking assistance sensor (PAS) or a smart parking assistance system (SPAS).
도 2는 본 발명의 일 실시예에 따른 음파 신호(SW) 출력 방법을 나타낸 순서도이다.2 is a flowchart illustrating a method for outputting a sound wave signal (SW) according to an embodiment of the present invention.
신호 발생 단계(s11)는 상기 주차 보조 센서 또는 스마트 주차 보조 시스템에서 음파 신호(SW)로 변환될 전압 신호(ES)를 발생시키는 단계이다. 이는 신호 발생부(11)에서 미리 지정된 주파수, 시작 시간, 지속 시간 및 반복 주기를 가진 신호를 발생시킴으로써 실시된다.Signal generation step (s11) is a step of generating a voltage signal (ES) to be converted into a sound wave signal (SW) in the parking assistance sensor or smart parking assistance system. This is implemented by generating a signal with a predetermined frequency, start time, duration, and repetition period in the signal generator 11 .
신호 증폭 단계(s12)는 상기 신호 발생 단계(s11)에서 발생된 전압 신호(ES)의 크기(amplitude)를 증폭하는 단계이다. 상술한 바와 같이 전압 증폭부(12)에서 상기 전압 신호(ES)의 크기를 5배 내지 20배로 증폭시킨다.The signal amplifying step (s12) is a step of amplifying the amplitude of the voltage signal (ES) generated in the signal generating step (s11). As described above, the voltage amplifying unit 12 amplifies the voltage signal ES by 5 to 20 times.
주파수 매칭 단계(s13)는 주차 보조 센서(PAS) 또는 스마트 주차 보조 시스템(SPAS)이 포함된 회로의 공진(resonance) 주파수를 상기 전압 신호(ES)의 주파수와 매칭시키는 단계이다. 주파수 매칭 단계(s13)는 반드시 상기 신호 발생 단계(s11) 및 신호 증폭 단계(s12) 이후에 실시되는 것은 아니며, 동시에 병렬적으로 실시될 수 있다.The frequency matching step (s13) is a step of matching the resonance frequency of the circuit including the parking assistance sensor (PAS) or the smart parking assistance system (SPAS) with the frequency of the voltage signal (ES). The frequency matching step (s13) is not necessarily performed after the signal generating step (s11) and the signal amplifying step (s12), but may be simultaneously performed in parallel.
한편, 주차 보조 센서(PAS) 또는 스마트 주차 보조 시스템(SPAS)는 본래의 기능인 주차 보조로 활용될 수 있어야 하므로, 제어부(13)는 주차 보조 센서 또는 스마트 주차 보조 시스템을 주차 보조 용도로 사용하기 위한 제 1 모드 및 음파 통신에 사용하기 위한 제 2 모드간의 전환이 가능하도록 구비될 수 있다.On the other hand, since the parking assist sensor (PAS) or the smart parking assist system (SPAS) must be able to be utilized as the original function of the parking assist, the control unit 13 uses the parking assist sensor or the smart parking assist system for the parking assist purpose. It may be provided to enable switching between the first mode and the second mode for use in sound wave communication.
제어부(13)는 제 2 모드로 설정되면 상기 신호 발생부(11)에 상기 전압 신호(ES)를 발생시키는 명령을 전송하고, 제 1 모드로 설정되면 상기 신호 발생부(11)에 상기 전압 신호(ES)의 발생을 중지시키는 명령을 전송한다. 이에 따라 주차 보조 센서 또는 스마트 주차 보조 시스템은 두가지 용도로 활용될 수 있으며 차량에 설치되는 구성이 감소되어 비용 절감의 효과가 있다.When set to the second mode, the control unit 13 transmits a command for generating the voltage signal ES to the signal generator 11 , and when set to the first mode, the voltage signal to the signal generator 11 . Sends a command to stop the occurrence of (ES). Accordingly, the parking assist sensor or smart parking assist system can be used for two purposes, and the configuration installed in the vehicle is reduced, thereby reducing costs.
바람직한 실시예로서, 상기 모듈(1) 및 상기 무선통신부를 포함한 전체 시스템은 모두 시간 동기화 되어 동작한다. 단, 상기 모듈(1) 및 상기 무선통신부만 시간 동기화 되어 동작하며, 모바일 장치(2)와는 시간 동기화 되지 않을 수 있다. 이는 복수의 주차 보조 센서 또는 스마트 주차 보조 시스템에서 출력되는 각 음파 신호가 시간 동기화 되지 않는 경우, 실제로 송출되는데까지 걸리는 시간이 불규칙하기 때문이다. 모바일 장치(2) 또는 차량에서 각각 수집 가능한 시간 데이터들은 음파 송출을 명령을 송신 및 수신하는 무선통신의 시점이므로 실제 음파 송출이 완료된 시점과는 시간적인 차이(delay)가 생기기 때문이다. 이는 통신 자체의 속도가 지체되는 현상이 아닌 모바일 장치(2)에서 무선통신부로 명령이 전달되는데 걸리는 딜레이로서, 운전자 모바일 장치(2)의 프로세서가 싱글 코어가 아닌 멀티 코어인 경우 같은 명령에 매번 동일한 메모리와 성능을 할당할 수 없기 때문에 발생하는 현상으로 파악된다. 이러한 딜레이는 시간 축이 다른 두 기기를 동기화 시킬 수 없기 때문에 거리 측정 알고리즘에 문제가 생긴다.In a preferred embodiment, the entire system including the module 1 and the wireless communication unit operates in synchronization with time. However, only the module 1 and the wireless communication unit are time-synchronized and may not be time-synchronized with the mobile device 2 . This is because, when each sound wave signal output from a plurality of parking assist sensors or smart parking assist system is not time-synchronized, the time it takes to actually be transmitted is irregular. This is because the time data that can be collected from the mobile device 2 or the vehicle is a time of wireless communication at which a sound wave transmission command is transmitted and received, and there is a time delay from the actual sound wave transmission time point. This is not a phenomenon in which the speed of communication itself is delayed, but a delay required to transmit a command from the mobile device 2 to the wireless communication unit. If the processor of the driver's mobile device 2 is multi-core instead of a single core, the same command is sent to the same command every time. It is understood that this is a phenomenon that occurs because memory and performance cannot be allocated. This delay causes problems in the distance measurement algorithm because two devices with different time axes cannot be synchronized.
일 실시예에 따라, 무선통신의 연결 시의 시간을 기준으로 동일시간 축을 설정하는 경우 이러한 딜레이에 의한 문제를 해결할 수 있다. 한번의 무선통신 명령으로 모든 차량의 각 채널에서 음파가 송출되기 때문에 모든 피에조 센서 에서의 절대적인 딜레이가 동일하다. 즉, 각 피에조 센서에서 송출되는 음파 신호(SW)들끼리의 딜레이 차이는 존재하지 않게 된다.According to an embodiment, when the same time axis is set based on the time when the wireless communication is connected, the problem caused by the delay can be solved. Since sound waves are transmitted from each channel of all vehicles with one wireless communication command, the absolute delay of all piezo sensors is the same. That is, there is no difference in delay between the sound wave signals SW transmitted from each piezo sensor.
본 발명에 따른 모듈(1)은 차량에 설치되어 차량의 도어를 개폐하는 차량 개폐 시스템에 연결될 수 있다. 상세하게, 상기 차량 개폐 시스템은 사용자의 모바일 장치(2)와 무선통신을 통해 연결되고, 상기 모바일 장치(2)는 상기 주차 보조 센서 또는 스마트 주차 보조 시스템에서 출력된 상기 음파 신호(SW)를 수신하고, 수신된 상기 음파 신호(SW)의 강도 및 도달 시간에 근거하여, 상기 모바일 장치(2)가 상기 차량으로부터 미리 설정된 기준 거리 이내에 진입했는지 여부를 판단할 수 있다.The module 1 according to the present invention may be installed in a vehicle and connected to a vehicle opening/closing system for opening and closing a door of the vehicle. In detail, the vehicle opening/closing system is connected to the user's mobile device 2 through wireless communication, and the mobile device 2 receives the sound wave signal SW output from the parking assistance sensor or smart parking assistance system. and, based on the strength and arrival time of the received sound wave signal SW, it is possible to determine whether the mobile device 2 enters within a preset reference distance from the vehicle.
이와 같이 음파 신호(SW)를 사용하여 차량의 도어를 개폐함으로써 운전자가 별도의 키폽을 휴대하지 않고 모바일 장치(2)만 휴대하여 차량의 도어를 개폐할 수 있으며 중계 해킹 공격(RSA)와 같은 차량 절도가 방지된다.As described above, by using the sound wave signal (SW) to open and close the vehicle door, the driver can open and close the vehicle door by carrying only the mobile device 2 without carrying a separate keypop, and the vehicle such as relay hacking attack (RSA) Theft is prevented.
본 발명에 따르면 차량에 이미 탑재되어 있는 주차 보조 센서(PAS) 또는 스마트 주차 보조 시스템(SPAS)을 활용하여 차량에 추가적인 공정 없이 음파 통신을 손쉽게 구성하는 것이 가능하다. 아울러 이러한 모듈(1)은 차량 이외에도 스마트 도어락 시스템 등에 적용이 가능하다.According to the present invention, it is possible to easily configure sound wave communication without an additional process in the vehicle by utilizing a parking assistance sensor (PAS) or a smart parking assistance system (SPAS) already installed in the vehicle. In addition, this module 1 can be applied to a smart door lock system in addition to a vehicle.
상기한 본 발명의 바람직한 실시 예는 예시의 목적으로 개시된 것이고, 본 발명에 대해 통상의 지식을 가진 당업자라면 본 발명의 사상과 범위 안에서 다양한 수정, 변경 및 부가가 가능할 것이며, 이러한 수정, 변경 및 부가는 상기의 특허청구 범위에 속하는 것으로 보아야 할 것이다.The above-described preferred embodiments of the present invention are disclosed for the purpose of illustration, and those skilled in the art with ordinary knowledge for the present invention will be able to make various modifications, changes and additions within the spirit and scope of the present invention. should be considered to be within the scope of the above claims.
본 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면, 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서, 여러 가지 치환, 변형 및 변경이 가능하므로, 본 발명은 전술한 실시 예 및 첨부된 도면에 의해 한정되는 것이 아니다.Those of ordinary skill in the art to which the present invention pertains, within the scope of not departing from the technical spirit of the present invention, various substitutions, modifications and changes are possible, so the present invention is described in the above-described embodiments and the accompanying drawings. not limited by
상술한 예시적인 시스템에서, 방법들은 일련의 단계 또는 블록으로써 순서도를 기초로 설명되고 있지만, 본 발명은 단계들의 순서에 한정되는 것은 아니며, 어떤 단계는 상술한 바와 다른 단계와 다른 순서로 또는 동시에 발생할 수 있다. 또한, 당업자라면 순서도에 나타낸 단계들이 배타적이지 않고, 다른 단계가 포함되거나 순서도의 하나 또는 그 이상의 단계가 본 발명의 범위에 영향을 미치지 않고 삭제될 수 있음을 이해할 수 있을 것이다.In the exemplary system described above, the methods are described on the basis of a flowchart as a series of steps or blocks, however, the present invention is not limited to the order of steps, and some steps may occur in a different order or concurrent with other steps as described above. can In addition, those skilled in the art will understand that the steps shown in the flowchart are not exhaustive and that other steps may be included or that one or more steps in the flowchart may be deleted without affecting the scope of the present invention.
본 발명에 따르면 기존의 주차 보조 센서(PAS) 또는 스마트 주차 보조 시스템(SPAS)을 기초로 음파 통신을 이용하여 차량을 개폐할 수 있다.According to the present invention, it is possible to open and close a vehicle using sound wave communication based on an existing parking assistance sensor (PAS) or a smart parking assistance system (SPAS).
또한, 본 발명에 따르면 전파 통신을 이용한 통신 시스템 대비 해킹당하지 않아 보안성을 극대화할 수 있다.In addition, according to the present invention, compared to a communication system using radio wave communication, it is not hacked, and security can be maximized.
또한, 본 발명에 따르면 기존 차량에 용이하게 적용할 수 있어, 현저한 비용 절감이 가능하다.In addition, according to the present invention, it can be easily applied to an existing vehicle, so that a significant cost reduction is possible.

Claims (7)

  1. 차량에 구비된 주차 보조 센서(PAS) 또는 스마트 주차 보조 시스템(SPAS)을 음파 통신에 이용하기 위한 모듈에 있어서,In a module for using a parking assistance sensor (PAS) or a smart parking assistance system (SPAS) provided in a vehicle for sound wave communication,
    미리 설정된 주파수를 갖는 전압 신호를 발생시키는 신호 발생부;a signal generator for generating a voltage signal having a preset frequency;
    상기 전압 신호를 증폭하여 상기 주차 보조 센서 또는 스마트 주차 보조 시스템으로 전송하는 전압 증폭부; 및a voltage amplifying unit for amplifying the voltage signal and transmitting it to the parking assist sensor or smart parking assist system; and
    상기 전압 신호의 발생을 제어하는 제어부;를 포함하고,Including; a control unit for controlling the generation of the voltage signal;
    상기 주차 보조 센서 또는 스마트 주차 보조 시스템은 상기 모듈에 의해 상기 전압 신호를 음파 신호로 출력하는 것을 특징으로 하는 모듈.The parking assist sensor or smart parking assist system module, characterized in that the output of the voltage signal as a sound wave signal by the module.
  2. 제 1 항에 있어서,The method of claim 1,
    상기 모듈은 차량에 설치되어 차량의 도어를 개폐하는 차량 개폐 시스템에 연결되는 것을 특징으로 하는 모듈.The module is installed in the vehicle, characterized in that connected to the vehicle opening and closing system for opening and closing the door of the vehicle.
  3. 제 2 항에 있어서,3. The method of claim 2,
    상기 차량 개폐 시스템은 사용자의 모바일 장치와 무선통신을 통해 연결되고,The vehicle opening and closing system is connected to the user's mobile device through wireless communication,
    상기 모바일 장치는,The mobile device is
    상기 주차 보조 센서 또는 스마트 주차 보조 시스템에서 출력된 상기 음파 신호를 수신하고, 수신된 상기 음파 신호의 강도에 근거하여, 상기 모바일 장치가 상기 차량으로부터 미리 설정된 기준 거리 이내에 진입했는지 여부를 판단하는 것을 특징으로 하는 모듈.receiving the sound wave signal output from the parking assist sensor or smart parking assist system, and determining whether the mobile device enters within a preset reference distance from the vehicle based on the strength of the received sound wave signal module to.
  4. 제 1 항에 있어서,The method of claim 1,
    상기 제어부는,The control unit is
    상기 주차 보조 센서 또는 스마트 주차 보조 시스템을 주차 보조 용도로 사용하기 위한 제 1 모드; 및a first mode for using the parking assist sensor or smart parking assist system for a parking assist purpose; and
    상기 주차 보조 센서 또는 스마트 주차 보조 시스템을 음파 통신에 사용하기 위한 제 2 모드; 간의 전환이 가능하고,a second mode for using the parking assist sensor or smart parking assist system for sonic communication; It is possible to switch between
    상기 제어부는 제 2 모드로 설정되면 상기 신호 발생부에 상기 전압 신호를 발생시키는 명령을 전송하고,When the control unit is set to the second mode, transmits a command to generate the voltage signal to the signal generating unit,
    상기 제어부는 제 1 모드로 설정되면 상기 신호 발생부에 상기 전압 신호의 발생을 중지시키는 명령을 전송하는 것을 특징으로 하는 모듈.When the control unit is set to the first mode, the module characterized in that it transmits a command to stop the generation of the voltage signal to the signal generating unit.
  5. 제 1 항에 있어서,The method of claim 1,
    상기 전압 신호는 19kHz 내지 21kHz 의 주파수를 갖는 것을 특징으로 하는 모듈.The voltage signal module, characterized in that having a frequency of 19 kHz to 21 kHz.
  6. 제 1 항에 있어서,The method of claim 1,
    상기 신호 발생부에 연결되어 구비되고, 상기 전압 신호로부터 서로 다른 복수의 전압 신호를 발생시키는 주파수 튜닝부를 더 구비하며,It is provided connected to the signal generating unit, further comprising a frequency tuning unit for generating a plurality of different voltage signals from the voltage signal,
    상기 제어부는 상기 주파수 튜닝부를 제어함으로써 복수의 전압 신호의 발생을 제어하는 것을 특징으로 하는 모듈.The control unit controls the generation of a plurality of voltage signals by controlling the frequency tuning unit.
  7. 제 1 항에 있어서,The method of claim 1,
    상기 주차 보조 센서 또는 스마트 주차 보조 시스템이 포함된 회로의 공진주파수를 상기 전압 신호의 주파수와 매칭시키는 주파수 매칭부를 더 포함하는 것을 특징으로 하는 모듈.Module characterized in that it further comprises a frequency matching unit for matching the resonant frequency of the circuit including the parking assistance sensor or smart parking assistance system with the frequency of the voltage signal.
PCT/KR2020/017895 2018-12-07 2020-12-09 Module for using, in sound wave communication, parking assist sensor (pas) or smart parking assist system (spas) WO2021118215A1 (en)

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