KR20210054607A - Apparatus and metohd calculaing the axle load of vehicles - Google Patents

Apparatus and metohd calculaing the axle load of vehicles Download PDF

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Publication number
KR20210054607A
KR20210054607A KR1020190139866A KR20190139866A KR20210054607A KR 20210054607 A KR20210054607 A KR 20210054607A KR 1020190139866 A KR1020190139866 A KR 1020190139866A KR 20190139866 A KR20190139866 A KR 20190139866A KR 20210054607 A KR20210054607 A KR 20210054607A
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South Korea
Prior art keywords
tire
companion
vehicle
diameter
wheel
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KR1020190139866A
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Korean (ko)
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김도환
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현대자동차주식회사
기아 주식회사
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Priority to KR1020190139866A priority Critical patent/KR20210054607A/en
Publication of KR20210054607A publication Critical patent/KR20210054607A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
    • B60W40/12—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to parameters of the vehicle itself, e.g. tyre models
    • B60W40/13—Load or weight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0486—Signalling devices actuated by tyre pressure mounted on the wheel or tyre comprising additional sensors in the wheel or tyre mounted monitoring device, e.g. movement sensors, microphones or earth magnetic field sensors
    • B60C23/0488—Movement sensor, e.g. for sensing angular speed, acceleration or centripetal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/06—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle
    • B60C23/061—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle by monitoring wheel speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
    • B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
    • B60W40/105—Speed
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G17/00—Apparatus for or methods of weighing material of special form or property
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
    • G01G19/03—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing during motion
    • B60W2050/0078—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2422/00—Indexing codes relating to the special location or mounting of sensors
    • B60W2422/70—Indexing codes relating to the special location or mounting of sensors on the wheel or the tire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/28—Wheel speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2530/00—Input parameters relating to vehicle conditions or values, not covered by groups B60W2510/00 or B60W2520/00
    • B60W2530/10—Weight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2556/00—Input parameters relating to data
    • B60W2556/45—External transmission of data to or from the vehicle
    • B60W2556/50—External transmission of data to or from the vehicle for navigation systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/303—Speed sensors
    • B60Y2400/3032—Wheel speed sensors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mathematical Physics (AREA)
  • Transportation (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

The present invention relates to technology for calculating an axial load of a vehicle by using a basic device installed in the vehicle and vehicle data. According to the present invention, disclosed are an axial load calculation method for a vehicle and an apparatus thereof. The method includes the following steps of: calculating a current dynamic radius of a tire by using a current vehicle speed and wheel speed; receiving current pneumatic pressure of the tire through TPMS; using test data forming a relation between the pneumatic pressure of the tire, the vehicle speed and the dynamic radius of the tire, to estimate a dynamic radius of the tire when the current pneumatic pressure of the tire is the reference pressure; and using a map forming the pneumatic pressure of the tire, a load of a wheel and the dynamic radius of the tire, to calculate a wheel load with respect to the dynamic radius of the tire estimated in the reference pressure condition, and calculate an axial load based on the same.

Description

차량용 축하중 계산방법 및 장치{APPARATUS AND METOHD CALCULAING THE AXLE LOAD OF VEHICLES}Vehicle axis weight calculation method and device {APPARATUS AND METOHD CALCULAING THE AXLE LOAD OF VEHICLES}

본 발명은 차량에 기본 장착된 장치와 차량 데이터를 사용하여 차량의 축하중을 계산하는 차량용 축하중 계산방법 및 장치에 관한 것이다.The present invention relates to a vehicle axial weight calculation method and apparatus for calculating the axial weight of a vehicle by using an apparatus and vehicle data installed in a vehicle.

기존에는 차량의 중량을 측정하기 위해 타이어의 공기주입구에 압력측정유닛을 장착하여 타이어의 압력으로 하중을 측정하는 방식을 적용하고 있다.Conventionally, in order to measure the weight of a vehicle, a pressure measurement unit is installed at the air inlet of a tire and a method of measuring the load using the pressure of the tire is applied.

그러나, 주행 중 타이어의 온도 상승에 따른 압력상승으로 인해 측정된 하중에 오차가 생기는 문제점이 있다.However, there is a problem in that an error occurs in the measured load due to an increase in pressure due to an increase in the temperature of the tire during driving.

이 외에도, 판스프링의 기울기를 감지하거나, 스트레인게이지 또는 로드셀을 사용한 변형율 측정방식으로 축하중을 추정하는 방식도 제안되고 있다.In addition, a method of estimating the axial weight by detecting the inclination of the leaf spring or measuring the strain rate using a strain gauge or a load cell has also been proposed.

그러나, 이들은 수많은 차량의 정확한 스프링상수를 알아야만 하고, 반드시 영점조절을 해야 하는 단점이 있다.However, they must know the exact spring constant of a number of vehicles, and have a disadvantage in that they must be zero-adjusted.

상기의 배경기술로서 설명된 사항들은 본 발명의 배경에 대한 이해 증진을 위한 것일 뿐, 이 기술분야에서 통상의 지식을 가진 자에게 이미 알려진 종래기술에 해당함을 인정하는 것으로 받아들여져서는 안 될 것이다.The matters described as the background art are only for enhancing an understanding of the background of the present invention, and should not be taken as acknowledging that they correspond to the prior art already known to those of ordinary skill in the art.

KR 10-1531792 B1KR 10-1531792 B1 KR 10-1519237 B1KR 10-1519237 B1 KR 10-1504573 B1KR 10-1504573 B1

본 발명은 전술한 바와 같은 문제점을 해결하기 위하여 안출한 것으로, 별도의 추가장치 없이 차량에 기본적으로 장착된 장치와 차량 데이터를 사용하여 차량의 축하중을 계산하는 차량용 축하중 계산방법 및 장치를 제공하는 데 있다.The present invention has been devised to solve the above-described problems, and provides a vehicle axial weight calculation method and apparatus for calculating the axial weight of a vehicle using a device basically installed in a vehicle and vehicle data without a separate additional device. I have to.

상기와 같은 목적을 달성하기 위한 본 발명의 구성은, 컨트롤러가, 현재 차속과 휠속도를 이용하여 현재 타이어의 동반경을 계산하는 동반경 계산단계; 컨트롤러가, TPMS에 의해 현재 타이어 공기압을 제공받는 공기압 검출단계; 컨트롤러가, 타이어 공기압과 차속과 타이어 동반경의 관계를 형성하는 시험데이터를 이용하여, 현재 타이어 공기압이 기준압력인 경우의 타이어 동반경을 추정하는 동반경 추정단계; 및 컨트롤러가, 타이어 공기압과 차륜의 하중과 타이어 동반경의 관계를 형성하는 맵을 이용하여, 상기 기준압력 조건에서 추정된 타이어 동반경에 대한 차륜 하중을 산출하고, 이를 기반으로 축하중을 산출하는 축하중 산출단계;를 포함하는 것을 특징으로 할 수 있다.The configuration of the present invention to achieve the above object, the controller, using the current vehicle speed and wheel speed to calculate the companion radius of the current tire by calculating the companion mirror step; An air pressure detection step of receiving, by the controller, a current tire air pressure by the TPMS; Companion diameter estimation step of estimating, by the controller, a tire companion diameter when the current tire air pressure is a reference pressure, using test data forming a relationship between the tire air pressure and the vehicle speed and the tire companion diameter; And the controller calculates the wheel load for the tire companion diameter estimated under the reference pressure condition, using a map that forms the relationship between the tire inflation pressure, the wheel load and the tire companion radius, and calculates the axis weight based on this. It may be characterized in that it includes; in the calculation step.

상기 동반경 계산단계에서는, GPS신호로 계산된 실체 차량의 속도와, 휠에 장착된 톤휠과, 초당 발생한 휠속도센서의 타코미터 신호를 이용하여 타이어의 동반경을 계산할 수 있다.In the calculation of the companion mirror, the vehicle speed calculated by the GPS signal, the tone wheel mounted on the wheel, and the tachometer signal of the wheel speed sensor generated per second may be used to calculate the companion radius of the tire.

상기 동반경 추정단계에서는, 차속이 일정하게 유지되는 조건에서 타이어 동반경을 추정할 수 있다.In the step of estimating the companion path, the companion path of the tire may be estimated under the condition that the vehicle speed is kept constant.

상기 축하중 산출단계에서는, 모든 차륜의 하중을 산출하고, 좌우측 한 쌍의 차륜의 하중을 더하여 축하중을 산출할 수 있다.In the axial weight calculation step, the axial weight may be calculated by calculating the loads of all the wheels and adding the loads of a pair of left and right wheels.

본 발명은, 현재 차속과 휠속도를 이용하여 현재 타이어의 동반경을 계산하는 동반경 계산부; TPMS에 의해 현재 타이어 공기압을 제공받는 공기압 검출부; 타이어 공기압과 차속과 타이어 동반경의 관계를 형성하는 시험값을 이용하여, 현재 타이어 공기압이 기준압력인 경우의 타이어 동반경을 추정하는 동반경 추정부; 및 타이어 공기압과 차륜의 하중과 타이어 동반경의 관계를 형성하는 맵을 이용하여, 상기 기준압력 조건에서 추정된 타이어 동반경에 대한 차륜 하중을 산출하고, 이를 기반으로 축하중을 산출하는 축하중 산출부;를 포함하는 것을 특징으로 할 수 있다.The present invention comprises: a companion-diameter calculation unit that calculates a companion-diameter of a current tire using a current vehicle speed and a wheel speed; An air pressure detection unit receiving the current tire air pressure by the TPMS; A companion-diameter estimating unit for estimating a tire companion radius when the current tire inflation pressure is a reference pressure, using a test value forming a relationship between the tire inflation pressure and the vehicle speed and the tire companion diameter; And an axle weight calculation unit that calculates the wheel load for the tire companion diameter estimated under the reference pressure condition, and calculates the axial weight based on the map that forms the relationship between the tire inflation pressure and the wheel load and the tire companion radius. It may be characterized by including;

상기 동반경 계산부는, GPS신호로 계산된 실체 차량의 속도와, 휠에 장착된 톤휠과, 초당 발생한 휠속도센서의 타코미터 신호를 이용하여 타이어의 동반경을 계산할 수 있다.The companion mirror calculation unit may calculate the companion radius of the tire by using the speed of the actual vehicle calculated by the GPS signal, the tone wheel mounted on the wheel, and the tachometer signal of the wheel speed sensor generated per second.

상기한 과제 해결수단을 통해 본 발명은, 차속과 휠속도를 이용하여 타이어 동반경을 계산하고, 타이어 공기압 상승을 고려하여 타이어 동반경을 보정함으로써, 타이어 압력상승에 의해 발생하는 하중 오차를 감소시키는 효과가 있다.Through the above-described problem solving means, the present invention calculates the tire travel diameter using the vehicle speed and the wheel speed, and corrects the tire travel diameter in consideration of the increase in tire pressure, thereby reducing the load error caused by the increase in tire pressure. It works.

더불어, 차량에 기본적으로 장착된 장치와 차량 데이터를 사용하여 차량의 축하중을 계산함으로써, 축하중 계산을 위한 장치 개발비 및 재료비가 불필요하여 차량의 원가를 절감하고, 차량의 SW 업데이트만으로 차량의 축하중을 계산하여 차량의 상품성을 향상시키는 효과도 있다.In addition, by calculating the axial weight of the vehicle using the device and vehicle data basically installed in the vehicle, the device development cost and material cost for calculating the celebratory weight are not required, thus reducing the vehicle cost and congratulating the vehicle only by updating the vehicle software There is also an effect of improving the marketability of the vehicle by calculating the weight.

도 1은 본 발명의 차량용 축하중 계산장치의 시스템 구성을 개략적으로 나타낸 도면.
도 2는 본 발명에 따른 차량용 축하중 계산방법의 흐름을 나타낸 도면.
도 3은 타이어 온도 상승에 따른 타이어 공기압의 관계를 설명하기 위한 도면.
도 4은 타이어 공기압과 차속과 타이어 동반경의 관계를 형성하는 시험데이터를 예시하여 나타낸 그래프.
도 5는 타이어 공기압과 차륜의 하중과 타이어 동반경의 관계를 예시하여 나타낸 그래프.1 is a view schematically showing the system configuration of the vehicle shaft weight calculation device of the present invention.
Figure 2 is a view showing the flow of the vehicle shaft weight calculation method according to the present invention.
Fig. 3 is a diagram for explaining a relationship between tire air pressure according to an increase in tire temperature.
4 is a graph illustrating test data forming a relationship between tire inflation pressure, vehicle speed, and tire travel diameter.
5 is a graph illustrating the relationship between tire inflation pressure, a wheel load, and a tire traveling diameter.

본 발명의 바람직한 실시예를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 차량용 축하중 계산장치의 시스템 구성도를 나타낸 것으로, 동반경 계산부(110)와, 공기압 검출부(120)와, 동반경 추정부(130) 및 축하중 산출부(140)를 포함하여 구성이 되고, 이들 구성요소들은 컨트롤러(100)에 포함되어 구성이 될 수 있다.1 shows a system configuration diagram of a vehicle shaft weight calculation device according to the present invention, a companion mirror calculation unit 110, an air pressure detection unit 120, a companion mirror estimation unit 130, and a shaft weight calculation unit 140 ), and these components may be included in the controller 100 to be configured.

참고로, 본 발명의 예시적인 실시예에 따른 컨트롤러(100)는 차량의 다양한 구성 요소의 동작을 제어하도록 구성된 알고리즘 또는 상기 알고리즘을 재생하는 소프트웨어 명령어에 관한 데이터를 저장하도록 구성된 비휘발성 메모리(도시되지 않음) 및 해당 메모리에 저장된 데이터를 사용하여 이하에 설명되는 동작을 수행하도록 구성된 프로세서(도시되지 않음)를 통해 구현될 수 있다. 여기서, 메모리 및 프로세서는 개별 칩으로 구현될 수 있다. 대안적으로는, 메모리 및 프로세서는 서로 통합된 단일 칩으로 구현될 수 있다. 프로세서는 하나 이상의 프로세서의 형태를 취할 수 있다.For reference, the controller 100 according to the exemplary embodiment of the present invention is a non-volatile memory (not shown) configured to store data related to an algorithm configured to control the operation of various components of a vehicle or a software command for reproducing the algorithm. (Not shown) and data stored in the corresponding memory may be implemented through a processor (not shown) configured to perform an operation described below. Here, the memory and the processor may be implemented as individual chips. Alternatively, the memory and processor may be implemented as a single chip integrated with each other. The processor may take the form of one or more processors.

첨부된 도면을 참조하여, 본 발명의 축하중 계산장치에 대해 구체적으로 살펴보면, 먼저 동반경 계산부(110)에서는 현재 차속과 휠속도를 이용하여 현재 타이어의 동반경을 계산한다.Referring to the accompanying drawings, referring to the accompanying drawings in detail with respect to the axial weight calculation apparatus of the present invention, first, the companion radius calculation unit 110 calculates the companion radius of the current tire by using the current vehicle speed and the wheel speed.

바람직하게는, GPS(200)신호로 계산된 실체 차량의 속도와, 휠에 장착된 톤휠과, 초당 발생한 휠속도센서(300)의 타코미터 신호를 이용하여 타이어의 동반경을 계산한다.Preferably, the companion radius of the tire is calculated using the speed of the actual vehicle calculated by the GPS 200 signal, the tone wheel mounted on the wheel, and the tachometer signal of the wheel speed sensor 300 generated per second.

예컨대, 수신된 GPS(200) 속도를 기준으로 각 휠에서 발생한 톤휠의 값으로 나누어 각 타이어의 동반경을 계산하는 것으로, GPS(200)로부터 수신한 차속이 68km/h 이고, 휠에 장착된 톤휠이 개수가 47개이며, 초당 발생한 타코미터의 신호가 470Hz 라면 하기의 수식(1)으로부터 타이어 동반경을 계산할 수 있다.For example, by dividing the value of the tone wheel generated from each wheel based on the received GPS 200 speed to calculate the companion diameter of each tire, the vehicle speed received from the GPS 200 is 68 km/h, and the tone wheel mounted on the wheel If the number is 47 and the signal of the tachometer generated per second is 470 Hz, the tire companion diameter can be calculated from the following equation (1).

Figure pat00001
.........(1)
Figure pat00001
.........(One)

즉, 타이어 회전 속도는 CAN의 타코미터 신호로 나오고, 이 신호를 GPS(200) 속도로 나줘주면 동반경을 구할 수 있다.That is, the tire rotation speed comes out as a tachometer signal of CAN, and if this signal is given as the speed of the GPS 200, a companion mirror can be obtained.

아울러, 공기압 검출부(120)에서는 TPMS(Tire Pressure Monitoring System)(400)에 의해 현재 타이어 공기압을 제공받는다.In addition, the air pressure detection unit 120 receives the current tire air pressure by the TPMS (Tire Pressure Monitoring System) 400.

그리고, 동반경 추정부(130)에서는 타이어 공기압과 차속과 타이어 동반경의 관계를 형성하는 시험데이터를 이용하여, 현재 타이어 공기압이 기준압력인 경우의 타이어 동반경을 추정한다. 여기서, 기준압력은 타이어의 초기 공기압으로 설정될 수 있다.In addition, the companion diameter estimating unit 130 estimates the tire companion diameter when the current tire air pressure is the reference pressure by using test data forming a relationship between the tire air pressure and the vehicle speed and the tire companion diameter. Here, the reference pressure may be set as the initial air pressure of the tire.

즉, 일반적으로 주행중 타이어의 온도는 50℃ 이상 변화하며, 이때에 타이어의 압력은 온도에 비례하여 선형적으로 변한다. 이에, GPS(200)와 타코미터로부터 계산한 동하중 반경을 보상해 주어야 한다.That is, in general, the temperature of the tire during driving changes by 50°C or more, and at this time, the pressure of the tire changes linearly in proportion to the temperature. Accordingly, the dynamic load radius calculated from the GPS 200 and the tachometer must be compensated.

예를 들어, 타이어의 초기 공기압이 200kPa이고, 타이어 온도가 25℃인 경우, 차량의 주행에 따라 타이어 온도가 40℃ 증가하여 65℃가 된다면 아래의 수식(2)에 따라 타이어 공기압은 226.8kPa 정도가 된다.For example, if the initial inflation pressure of the tire is 200kPa and the tire temperature is 25℃, if the tire temperature increases by 40℃ and reaches 65℃ according to the driving of the vehicle, the tire inflation pressure is about 226.8kPa according to Equation (2) below. Becomes.

Figure pat00002
...............(2)
Figure pat00002
...............(2)

도 4은 타이어 공기압과 차속과 타이어 동반경의 관계를 형성하는 시험데이터를 예시하여 나타낸 그래프로서, 이 시험데이터에 따르면 타이어 온도가 65℃가 되어 226.8kPa의 공기압 조건에서 68kph로 주행시 약 300mm의 동하중 반경을 갖지만, 타이어 온도가 25℃이고 타이어 공기압이 200kPa인 조건에서 68kph로 주행시 약 298.5mm의 동하중 반경을 갖는 것을 확인할 수 있다.FIG. 4 is a graph illustrating test data forming the relationship between tire inflation pressure and vehicle speed and tire travel diameter. According to this test data, a dynamic load radius of about 300mm when the tire temperature reaches 65℃ and runs at 68kph under the pneumatic condition of 226.8kPa. However, when driving at 68 kph under the condition that the tire temperature is 25°C and the tire inflation pressure is 200 kPa, it can be seen that the dynamic load radius is about 298.5 mm.

이에, GPS(200)와 휠속도센서(300)를 통해 구해진 300mm의 동하중 반경을 298.5mm로 보정하게 된다.Accordingly, the dynamic load radius of 300 mm obtained through the GPS 200 and the wheel speed sensor 300 is corrected to 298.5 mm.

아울러, 축하중 산출부(140)에서는 타이어 공기압과 차륜의 하중과 타이어 동반경의 관계를 형성하는 맵을 이용하여, 추정된 타이어 동반경에 대한 차륜 하중을 산출하고, 이를 기반으로 축하중을 산출한다.In addition, the axis weight calculation unit 140 calculates the wheel load for the estimated tire companion radius by using a map that forms a relationship between the tire inflation pressure, the wheel load and the tire companion radius, and calculates the axis weight based on this. .

예컨대, 도 5는 타이어 공기압과 차륜의 하중과 타이어 동반경의 관계를 나타내는 그래프로서, 타이어 공기압이 200kpa인 조건에서 구해진 동하중 반경 298.5mm에 대해 차륜 하중으로 보간하여 구하면, 해당 차륜이 약 3500N의 하중을 지지하고 있는 것으로 확인할 수 있다.For example, FIG. 5 is a graph showing the relationship between tire inflation pressure, wheel load, and tire companion diameter. It can be confirmed that it supports.

이를 4바퀴 모두 구한 후 각 차륜의 하중을 구하고, 좌우측 한 쌍의 차륜의 하중을 더하여 축하중을 산출한 후, 클러스터(500)에 디스플레이할 수 있게 된다.After all 4 wheels are obtained, the load of each wheel is calculated, and the axial weight is calculated by adding the loads of a pair of left and right wheels, and then displayed on the cluster 500.

상기한 구성에 따라, 차속과 휠속도를 이용하여 타이어 동반경을 계산하고, 타이어 공기압 상승을 고려하여 타이어 동반경을 보정함으로써, 압력상승에 의해 발생하는 하중 오차를 감소시키게 된다.According to the above-described configuration, the tire traveling diameter is calculated using the vehicle speed and the wheel speed, and the tire traveling diameter is corrected in consideration of the increase in the tire inflation pressure, thereby reducing the load error caused by the pressure increase.

특히, 별도의 추가장치 없이 차량에 기본적으로 장착된 장치와 차량 데이터를 사용하여 차량의 축하중을 계산함으로써, 축하중 계산을 위한 장치 개발비 및 재료비가 불필요하여 차량의 원가를 절감하고, 차량의 SW 업데이트만으로 차량의 축하중을 계산하여 상품성을 향상시키게 된다.In particular, by calculating the axial weight of the vehicle using the device and vehicle data that are basically installed in the vehicle without a separate additional device, the device development cost and material cost for calculating the axial weight are unnecessary, thus reducing the vehicle cost and reducing the vehicle's SW By only updating the vehicle's celebratory weight, it improves the marketability.

한편, 본 발명에 따른 차량용 축하중 계산방법은, 컨트롤러(100)가, 현재 차속과 휠속도를 이용하여 현재 타이어의 동반경을 계산하는 동반경 계산단계; 컨트롤러(100)가, TPMS(400)에 의해 현재 타이어 공기압을 제공받는 공기압 검출단계; 컨트롤러(100)가, 타이어 공기압과 차속과 타이어 동반경의 관계를 형성하는 시험값을 이용하여, 현재 타이어 공기압이 기준압력으로 변경되는 경우의 타이어 동반경을 추정하는 동반경 추정단계; 및 컨트롤러(100)가, 타이어 동반경과 차륜 하중의 관계를 형성하는 하중맵을 이용하여, 추정된 타이어 동반경에 대한 차륜 하중을 산출하고, 이를 기반으로 축하중을 산출하는 축하중 산출단계;를 포함하여 구성이 된다.On the other hand, the vehicle shaft weight calculation method according to the present invention, the controller 100, the companion diameter calculation step of calculating the companion diameter of the current tire using the current vehicle speed and the wheel speed; In the controller 100, the air pressure detection step of receiving the current tire air pressure by the TPMS (400); Companion diameter estimation step of estimating, by the controller 100, a tire companion diameter when the current tire air pressure is changed to a reference pressure using a test value forming a relationship between the tire air pressure and the vehicle speed and the tire companion diameter; And the controller 100 calculates the wheel load for the estimated tire companion radius using a load map that forms a relationship between the tire companion mirror and the wheel load, and calculates the axial weight based on this calculation step; It is composed of including.

여기서, 상기 동반경 계산단계에서는, GPS(200)신호로 계산된 실체 차량의 속도와, 휠에 장착된 톤휠과, 초당 발생한 휠속도센서(300)의 타코미터 신호를 이용하여 타이어의 동반경을 계산하게 된다.Here, in the calculation of the companion radius, the companion radius of the tire is calculated using the speed of the actual vehicle calculated by the GPS 200 signal, the tone wheel mounted on the wheel, and the tachometer signal of the wheel speed sensor 300 generated per second. It is done.

그리고, 상기 동반경 추정단계에서는, 차속이 일정하게 유지되는 조건으로 타이어 동반경을 추정하게 된다.In addition, in the step of estimating the driving distance of the tire, the driving distance of the tire is estimated under the condition that the vehicle speed is kept constant.

예컨대, 68kph의 차속으로 주행시 동하중 반경을 연산한 경우, 68kph의 차속조건을 유지하는 상태에서 시험데이터를 이용하여 동하중 반경을 추정할 수 있다.For example, when a dynamic load radius is calculated while driving at a vehicle speed of 68 kph, the dynamic load radius can be estimated using test data while maintaining the vehicle speed condition of 68 kph.

아울러, 상기 축하중 산출단계에서는, 모든 차륜의 하중을 산출하고, 좌우측 한 쌍의 차륜의 하중을 더하여 축하중을 산출할 수 있다.In addition, in the step of calculating the shaft weight, the load of all the wheels may be calculated, and the load of the pair of left and right wheels may be added to calculate the shaft weight.

도 2를 참조하여, 본 발명의 축하중 계산과정의 흐름을 설명하면, 차량의 주행 중 휠속도센서(300)와 GPS(200)에서 신호가 수신되면(S10), 수신된 신호를 이용하여 타이어 동반경을 계산한다(S20).Referring to FIG. 2, the flow of the calculation process of the axis of the present invention is described. When a signal is received from the wheel speed sensor 300 and the GPS 200 while the vehicle is running (S10), the tire is Compute the companion mirror (S20).

그리고, TPMS(400)로부터 타이어 공기압을 수신한다(S30).Then, the tire air pressure is received from the TPMS 400 (S30).

이어서, 타이어 공기압과 차속과 타이어 동반경의 관계를 형성하는 시험데이터에 의해 수신된 타이어 공기압을 타이어 초기 공기압으로 가정했을 때의 타이어 동반경을 추정하여, S20에서 구해진 타이어 동반경을 보정한다(S40).Subsequently, the tire traveling radius obtained in S20 is corrected by estimating the tire traveling radius assuming that the tire inflation pressure received by the test data forming the relationship between the tire inflation pressure and the vehicle speed and the tire traveling radius is the initial tire pressure (S40). .

그리고, 타이어 공기압과 차륜의 하중과 타이어 동반경의 관계를 형성하는 맵을 이용하여 추정된 타이어 동반경에 대한 차륜의 하중을 구한다(S50). 이때에 모든 차륜의 하중을 각각 구한다.Then, the load of the wheel with respect to the estimated tire travel radius is obtained by using a map that forms a relationship between the tire inflation pressure, the wheel load and the tire travel diameter (S50). At this time, the loads of all the wheels are calculated separately.

이어서, 좌우 한쌍의 차륜 하중을 더하여 축하중을 연산한다(S60).Subsequently, the shaft load is calculated by adding the left and right wheel loads (S60).

그리고, 이처럼 연산된 축하중을 클러스터(500)에 디스플레이시키고(S70), 이를 차량의 시동 오프시까지 지속적으로 실시하게 된다.Then, the calculated celebratory weight is displayed on the cluster 500 (S70), and this is continuously performed until the vehicle is turned off.

상술한 바와 같이, 본 발명은 별도의 추가장치 없이 차량에 기본적으로 장착된 장치와 차량 데이터를 사용하여 차량의 축하중을 계산함으로써, 축하중 계산을 위한 장치 개발비 및 재료비가 불필요하여 차량의 원가를 절감하고, 차량의 SW 업데이트만으로 차량의 축하중을 계산하여 차량의 상품성을 향상시키게 된다.As described above, the present invention calculates the axle weight of the vehicle using the device and vehicle data basically installed in the vehicle without a separate additional device, so that the device development cost and material cost for calculating the axial weight are unnecessary, thus reducing the cost of the vehicle. It saves money, and improves the marketability of the vehicle by calculating the axial weight of the vehicle only by updating the vehicle's SW.

한편, 본 발명은 상기한 구체적인 예에 대해서만 상세히 설명되었지만 본 발명의 기술사상 범위 내에서 다양한 변형 및 수정이 가능함은 당업자에게 있어서 명백한 것이며, 이러한 변형 및 수정이 첨부된 특허청구범위에 속함은 당연한 것이다.On the other hand, the present invention has been described in detail only for the above specific examples, but it is obvious to those skilled in the art that various modifications and modifications are possible within the scope of the technical idea of the present invention, and it is natural that such modifications and modifications belong to the appended claims. .

100 : 컨트롤러
110 : 동반경 계산부
120 : 공기압 검출부
130 : 동반경 추정부
140 : 축하중 산출부
200 : GPS
300 : 휠속도센서
400 : TPMS
500 : 클러스터100: controller
110: companion mirror calculation unit
120: air pressure detection unit
130: companionship estimation unit
140: calculation during celebration
200: GPS
300: wheel speed sensor
400: TPMS
500: cluster

Claims (6)

컨트롤러가, 현재 차속과 휠속도를 이용하여 현재 타이어의 동반경을 계산하는 동반경 계산단계;
컨트롤러가, TPMS에 의해 현재 타이어 공기압을 제공받는 공기압 검출단계;
컨트롤러가, 타이어 공기압과 차속과 타이어 동반경의 관계를 형성하는 시험데이터를 이용하여, 현재 타이어 공기압이 기준압력인 경우의 타이어 동반경을 추정하는 동반경 추정단계; 및
컨트롤러가, 타이어 공기압과 차륜의 하중과 타이어 동반경의 관계를 형성하는 맵을 이용하여, 상기 기준압력 조건에서 추정된 타이어 동반경에 대한 차륜 하중을 산출하고, 이를 기반으로 축하중을 산출하는 축하중 산출단계;를 포함하는 차량용 축하중 계산방법.A companion-diameter calculation step of calculating, by the controller, a companion-diameter of the current tire using the current vehicle speed and the wheel speed;
An air pressure detection step of receiving, by the controller, a current tire air pressure by the TPMS;
Companion diameter estimation step of estimating, by the controller, a tire companion diameter when the current tire air pressure is a reference pressure, using test data forming a relationship between the tire inflation pressure and the vehicle speed and the tire companion diameter; And
The controller calculates the wheel load for the tire companion diameter estimated under the reference pressure condition, using a map that forms the relationship between the tire inflation pressure and the wheel load and the tire companion radius, and calculates the axis weight based on this. Calculation step; calculation method for vehicle axial weight including. 청구항 1에 있어서,
상기 동반경 계산단계에서는,
GPS신호로 계산된 실체 차량의 속도와, 휠에 장착된 톤휠과, 초당 발생한 휠속도센서의 타코미터 신호를 이용하여 타이어의 동반경을 계산하는 것을 특징으로 하는 차량용 축하중 계산방법.The method according to claim 1,
In the companion mirror calculation step,
A method for calculating axle weight for a vehicle, comprising calculating a companion radius of a tire using the speed of the actual vehicle calculated by the GPS signal, the tone wheel mounted on the wheel, and the tachometer signal of the wheel speed sensor generated per second. 청구항 1에 있어서,
상기 동반경 추정단계에서는,
차속이 일정하게 유지되는 조건에서 타이어 동반경을 추정하는 것을 특징으로 하는 차량용 축하중 계산방법.The method according to claim 1,
In the companion relationship estimation step,
A method for calculating axle load for a vehicle, characterized in that estimating a tire companion radius under a condition in which the vehicle speed is kept constant. 청구항 1에 있어서,
상기 축하중 산출단계에서는,
모든 차륜의 하중을 산출하고, 좌우측 한 쌍의 차륜의 하중을 더하여 축하중을 산출하는 것을 특징으로 하는 차량용 축하중 계산방법.The method according to claim 1,
In the calculation step of the celebration,
A method for calculating axle weight for a vehicle, characterized in that the load of all wheels is calculated and the load of a pair of left and right wheels is added to calculate the shaft weight. 현재 차속과 휠속도를 이용하여 현재 타이어의 동반경을 계산하는 동반경 계산부;
TPMS에 의해 현재 타이어 공기압을 제공받는 공기압 검출부;
타이어 공기압과 차속과 타이어 동반경의 관계를 형성하는 시험값을 이용하여, 현재 타이어 공기압이 기준압력인 경우의 타이어 동반경을 추정하는 동반경 추정부; 및
타이어 공기압과 차륜의 하중과 타이어 동반경의 관계를 형성하는 맵을 이용하여, 상기 기준압력 조건에서 추정된 타이어 동반경에 대한 차륜 하중을 산출하고, 이를 기반으로 축하중을 산출하는 축하중 산출부;를 포함하는 차량용 축하중 계산장치.A companion-diameter calculation unit that calculates a companion-diameter of the current tire using the current vehicle speed and wheel speed;
An air pressure detection unit receiving the current tire air pressure by the TPMS;
A companion-diameter estimating unit for estimating a tire companion radius when the current tire inflation pressure is a reference pressure, using a test value forming a relationship between the tire inflation pressure and the vehicle speed and the tire companion diameter; And
An axle weight calculation unit that calculates a wheel load for a tire companion diameter estimated under the reference pressure condition, and calculates an axle weight based on the map for forming a relationship between the tire inflation pressure and the wheel load and the tire companion diameter; Vehicle axial weight calculation device comprising a. 청구항 5에 있어서,
상기 동반경 계산부는,
GPS신호로 계산된 실체 차량의 속도와, 휠에 장착된 톤휠과, 초당 발생한 휠속도센서의 타코미터 신호를 이용하여 타이어의 동반경을 계산하는 것을 특징으로 하는 차량용 축하중 계산장치.The method of claim 5,
The companion mirror calculation unit,
A vehicle axis weight calculation device, characterized in that it calculates a companion radius of a tire using the speed of the actual vehicle calculated by the GPS signal, the tone wheel mounted on the wheel, and the tachometer signal of the wheel speed sensor generated per second.
KR1020190139866A 2019-11-05 2019-11-05 Apparatus and metohd calculaing the axle load of vehicles KR20210054607A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101504573B1 (en) 2014-09-04 2015-03-23 주식회사 유디코 Apparatus and method for measuring axle weight of vehicle
KR101519237B1 (en) 2013-11-20 2015-05-11 현대자동차주식회사 Axial-load-measuring-device of truck and operation-method thereof
KR101531792B1 (en) 2014-04-08 2015-06-25 주식회사 더원 Loading weight measuring device for truck

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101519237B1 (en) 2013-11-20 2015-05-11 현대자동차주식회사 Axial-load-measuring-device of truck and operation-method thereof
KR101531792B1 (en) 2014-04-08 2015-06-25 주식회사 더원 Loading weight measuring device for truck
KR101504573B1 (en) 2014-09-04 2015-03-23 주식회사 유디코 Apparatus and method for measuring axle weight of vehicle

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