KR100326299B1 - Measuring method for ground contact pressure - Google Patents
Measuring method for ground contact pressure Download PDFInfo
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- KR100326299B1 KR100326299B1 KR1019990019423A KR19990019423A KR100326299B1 KR 100326299 B1 KR100326299 B1 KR 100326299B1 KR 1019990019423 A KR1019990019423 A KR 1019990019423A KR 19990019423 A KR19990019423 A KR 19990019423A KR 100326299 B1 KR100326299 B1 KR 100326299B1
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- tire
- ground
- pressure distribution
- measuring
- pressure sensor
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000002474 experimental method Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
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- 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
- B60C23/08—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 touching the ground
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L17/00—Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies
- G01L17/005—Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies using a sensor contacting the exterior surface, e.g. for measuring deformation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
본 발명은 주행시의 타이어의 접지압력분포를 측정하는 방법에 관한 것으로, 차량을 실제로 주행시켜서 차량에 설치된 타이어(10)가 접지판(1)을 통과하도록 하되, 접지판(1)의 임의의 위치에 타이어가 도달된 시점에서의 압력센서(2ab)들의 측정값(Pab)만을 비교·연산처리하여 접지압력분포를 산출하므로, 실험의 정확도와 신뢰성이 향상된다.The present invention relates to a method for measuring the distribution of the ground pressure of the tire during driving, and actually driving the vehicle so that the tire 10 installed in the vehicle passes through the ground plate 1, but any position of the ground plate 1 By comparing and calculating only the measured value P ab of the pressure sensors 2 ab at the time when the tire is reached, the ground pressure distribution is calculated, thereby improving the accuracy and reliability of the experiment.
Description
본 발명은 주행시의 타이어의 접지압력분포를 측정하는 방법에 관한 것으로, 특히 실제 주행에서의 타이어 접지압력분포를 측정하여 실험의 정확도와 신뢰성이 향상되도록 하는 타이어의 접지압력분포를 측정하는 방법에 관한 것이다.The present invention relates to a method for measuring the ground pressure distribution of a tire during driving, and more particularly, to a method for measuring the tire ground pressure distribution for improving the accuracy and reliability of the experiment by measuring the tire ground pressure distribution in actual driving. will be.
주지된 바와 같이, 타이어의 접지압력분포는 타이어의 형상 및 특성을 결정하는데 있어서 중요한 기준요인으로서, 이를 측정하는 시험은 다른 어떤 시험보다도 중요하다.As is well known, the ground pressure distribution of a tire is an important criterion in determining the shape and characteristics of a tire, and the test for measuring it is more important than any other test.
도 3은 타이어의 접지압력분포를 측정하는 장치를 도시한 것으로, 종래 기술에 따른 측정방법을 설명하기 위한 도면인 바, 이에 의하면 측정장치는, 소정 간격을 이루며 행렬방향으로 균일하게 분포된 다수의 압력센서(2ab)가 구비되어 타이어의 접지압력분포를 검출하는 접지판(1)과, 압력센서(2ab)로부터의 출력신호인 아날로그신호를 증폭하는 증폭기(3), 증폭기(3)로부터의 출력신호의 노이즈를 제거하는 필터(4), 필터(4)로부터의 출력신호인 아날로그신호를 디지털신호로 변환하는 AD변환기(5), AD변환기(5)로부터의 출력신호를 입력받아 이를 비교·연산처리하여 접지압력분포를 산출하는 제어기(6) 및, 제어기(6)로부터의 출력신호인 제어신호에 따라 접지압력분포를 출력하는 출력기(7)로 이루어지되, 증폭기(3)와 필터(4) 및 AD변환기(5)는 한 셋트를 이루며 각각의 압력센서(2ab)에 개별적으로 연결되는 구조로 되어 있다.3 is a diagram illustrating an apparatus for measuring a tire pressure distribution, which is a view for explaining a measuring method according to the related art, whereby a measuring apparatus includes a plurality of uniformly distributed in a matrix direction at predetermined intervals. A pressure plate (2 ab ) is provided to detect the ground pressure distribution of the tire (1), from the amplifier (3) and the amplifier (3) for amplifying an analog signal which is an output signal from the pressure sensor (2 ab ). Filter (4) for removing the noise of the output signal of < RTI ID = 0.0 > (4) < / RTI > A controller 6 which calculates the ground pressure distribution by arithmetic processing, and an output unit 7 which outputs the ground pressure distribution in accordance with a control signal which is an output signal from the controller 6; 4) and AD converter 5 It is structured to be connected to each pressure sensor 2 ab individually.
이러한 측정장치를 이용한 종래의 측정방법은, 우선 휠축(9)에 임의의 하중을 가하여 노면(8)에 설치된 접지판(1)에 타이어(10)가 접지되며 눌려지도록 하면, 접지판(1)에 구비된 각 압력센서(2ab)로부터의 측정값(Pab)을 제어기(6)에서 입력받아서 이를 비교·연산처리하여 접지압력분포를 산출하고, 제어기(6)로부터의 제어신호에 따라 출력기(7)로부터 접지압력분포가 출력되도록 한다.In the conventional measuring method using such a measuring device, if the tire 10 is grounded and pressed against the ground plate 1 provided on the road surface 8 by applying an arbitrary load to the wheel shaft 9, the ground plate 1 The measured value P ab from each pressure sensor 2 ab provided in the controller 6 is inputted and compared and computed to calculate the ground pressure distribution, and according to the control signal from the controller 6 The ground pressure distribution is to be output from (7).
여기서, 상기 압력센서(2ab)는 접지판(1)에 소정 간격을 이루며 행렬방향으로 균일하게 분포되어 있으므로, 출력기(7)로부터의 출력값으로는 타이어의 접지면적과, 타이어(10)의 각 부분에 가해지는 접지압력의 크기, 즉 타이어(10)의 어느 부분에 얼마만큼의 접지압력이 가해지는지를 알 수 있게 된다.Here, since the pressure sensor 2 ab is uniformly distributed in the matrix direction at predetermined intervals on the ground plate 1, the output value from the output device 7 is the ground area of the tire and the angle of the tire 10. It is possible to know the magnitude of the ground pressure applied to the portion, that is, how much ground pressure is applied to which portion of the tire 10.
상기 종래의 측정방법은, 타이어(10)가 휠축(9)에 고정되어 정지된 상태에서 접지압력분포를 측정하는 방법으로서, 단지 정지상태에서의 타이어 접지가 실제 주행에서의 타이어 접지와 동일하다는 가정하에 실시되고 있다.The conventional measuring method is a method of measuring the ground pressure distribution in a state in which the tire 10 is fixed to the wheel shaft 9 and stopped, assuming that the tire ground in the stationary state is the same as the tire ground in actual driving. Under the following conditions.
그러나, 이러한 종래 측정방법은 실제 주행에 있어서의 기타 조건들(일예로 주행시 발생되는 미끄러짐이나, 마찰, 또는 진동으로 인한 하중의 변화 등)이 배제되기 때문에 측정실험의 신뢰성이 낮고, 그 측정값 또한 실제 주행에서의 측정값과다소의 차이가 발생되는 문제가 있었다.However, such a conventional measuring method is low in reliability of the measurement experiment because other conditions in actual driving (for example, a change in load caused by driving, friction, or vibration, etc.) are excluded, and the measured value is also reduced. There was a problem that the difference between the measured value and the actual running occurs.
이에 본 발명은 상기와 같은 문제를 해소하기 위해 발명된 것으로, 실제 주행에서의 타이어 접지압력분포를 측정하여 실험의 정확도와 신뢰성이 향상되도록 하는 타이어의 접지압력분포를 측정하는 방법을 제공함에 그 목적이 있다.Accordingly, the present invention has been invented to solve the above problems, to provide a method for measuring the ground pressure distribution of the tire to improve the accuracy and reliability of the experiment by measuring the tire ground pressure distribution in the actual driving. There is this.
도 1은 접지압력분포를 측정하는 장치의 개략적인 구성도로서, 본 발명에 따른 측정방법을 설명하기 위한 도면,1 is a schematic configuration diagram of a device for measuring a ground pressure distribution, a view illustrating a measuring method according to the present invention;
도 2는 본 발명의 측정방법에 따른 제어흐름을 나타낸 순서도,2 is a flow chart showing a control flow according to the measuring method of the present invention,
도 3은 도 1에 대한 대응도로서, 종래 기술에 따른 측정방법을 설명하기 위한 도면이다.FIG. 3 is a diagram corresponding to FIG. 1 and illustrating a measuring method according to the related art.
1 ; 접지판, 2ab; 압력센서,One ; Ground plate, 2 ab ; Pressure sensor,
2a1; 제1열 압력센서, 3 ; 신호증폭기,2 a1 ; First row pressure sensor, 3; Signal Amplifier,
4 ; 필터, 5 ; AD변환기,4 ; Filter, 5; AD converter,
6 ; 제어기, 7 ; 출력기,6; Controller, 7; Writer,
8 ; 노면, 9 ; 휠축,8 ; Road surface, 9; Wheel Axle,
10 ; 타이어.10; tire.
상기와 같은 목적을 달성하기 위한 본 발명은, 다수의 압력센서가 구비된 접지판과, 각각의 압력센서로부터의 출력신호를 증폭하고 노이즈를 제거하며 아날로그신호를 디지털신호로 변환하는 수단, AD변환기로부터의 출력신호를 입력받아 이를 비교·연산처리하여 접지압력분포를 산출하는 제어기 및, 제어기로부터의 출력신호에 따라 접지압력분포를 출력하는 출력기로 이루어진 측정장치를 이용하여 타이어의 접지압력분포를 측정하는 방법에 있어서, 차량을 실제로 주행시켜서 차량의 타이어가 노면에 설치된 접지판을 통과하도록 하되, 제1열 압력센서에 타이어의 접지압력이 검출되는 시점부터 경과시간을 카운트하여, 타이어가 접지판의 설정된 위치에 도달할 때까지의 시간이 경과되면, 이 시점에서의 전체 압력센서로부터의 측정값만을 선택적으로 비교·연산처리하여 접지압력분포를 산출하는 것을 특징으로 하는 타이어의 접지압력분포를 측정하는 방법으로 되어 있다.The present invention for achieving the above object, the ground plate is provided with a plurality of pressure sensors, means for amplifying the output signal from each pressure sensor, removing noise and converting analog signals into digital signals, AD converter The tire's ground pressure distribution is measured using a measuring device that receives the output signal from the controller, compares and computes the ground pressure distribution, and outputs the ground pressure distribution according to the output signal from the controller. In the method, the vehicle is actually driven so that the tire of the vehicle passes through the ground plate installed on the road surface, and the elapsed time is counted from the time when the ground pressure of the tire is detected by the first row pressure sensor, so that the tire When the time until reaching the set position has elapsed, only the measured value from all the pressure sensors at this point is selected. The ground pressure distribution of the tire is measured by comparing and calculating the ground pressure distribution.
이하 본 발명을 첨부된 예시도면을 참조하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
도 1은 접지압력분포를 측정하는 장치의 개략적인 구성도로서, 본 발명에 따른 측정방법을 설명하기 위한 도면인 바, 이에 도시된 측정장치는 종래 기술을 도시한 도 3과 동일한 구성으로 이루어지므로, 동일한 부위에는 동일한 참조부호를 붙이면서 이에 대한 설명은 생략한다.Figure 1 is a schematic configuration diagram of a device for measuring the ground pressure distribution, which is a view for explaining a measuring method according to the present invention, since the measuring device shown in this is made of the same configuration as Figure 3 showing the prior art In the same part, the same reference numerals will be given, and description thereof will be omitted.
도 1에 의하면 본 발명에 따른 측정방법은, 차량의 휠축(9)에 타이어(10)를 설치한 후, 타이어(10)가 노면(8)에 설치된 접지판(1)을 통과하도록 차량을 실제 주행하면, 타이어(10)가 접지판(1)의 임의의 위치를 통과할 때, 전체 압력센서(2ab)로부터의 측정값을 제어기(6)에서 입력받아서 이를 비교·연산처리하여 접지압력분포를 산출하고, 제어기(6)로부터의 제어신호에 따라 출력기(7)로부터 접지압력분포가 출력되도록 한다.According to FIG. 1, in the measuring method according to the present invention, after the tire 10 is installed on the wheel shaft 9 of the vehicle, the vehicle is actually mounted so that the tire 10 passes through the ground plate 1 installed on the road surface 8. When running, when the tire 10 passes through the arbitrary position of the ground plate 1, the measured value from the entire pressure sensor 2 ab is input from the controller 6, and it is compared and computed and the ground pressure distribution. Is calculated and the ground pressure distribution is output from the output unit 7 according to the control signal from the controller 6.
이때 측정 위치는 차량의 주행속도와, 차량 주행방향으로의 접지판(1)의 길이를 감안하여 설정하게 되는데, 가능하면 타이어(10)가 접지판(1)의 중심에 위치되었을 때로 하는 것이 바람직하다.In this case, the measurement position is set in consideration of the traveling speed of the vehicle and the length of the ground plate 1 in the vehicle driving direction. Preferably, the tire 10 is positioned when the tire 10 is located at the center of the ground plate 1. Do.
예를 들면, 제1열 압력센서(2a1)의 감지시점부터 최종열 압력센서(2ab)의 감지시점까지의 경과 시간이 약 0.003초라면 타이어(10)가 길이 중심을 통과하는 시점은 제1열 압력센서(2a1)의 감지시점부터 약 0.0015초가 경과되었을 때이다. 따라서, 제어기(6)에서 제1열 압력센서(2a1)의 감지시점부터 경과시간을 카운트하여 약 0.0015초가 경과된 시점에서의 전체 압력센서(2ab)로부터의 측정값을 취하면, 접지판(1)의 대략 중심에 위치된 타이어(10)의 실제 주행시의 접지압력분포를 알 수 있게 된다.For example, if the elapsed time from the time of detecting the first heat pressure sensor 2 a1 to the time of detecting the last heat pressure sensor 2 ab is about 0.003 seconds, the time when the tire 10 passes through the center of the length is the first time. This is when about 0.0015 seconds have elapsed since the detection of the thermal pressure sensor 2 a1 . Therefore, when the controller 6 counts the elapsed time from the time of detection of the first row pressure sensor 2 a1 and takes the measured value from the total pressure sensor 2 ab at the time when about 0.0015 seconds have elapsed, the ground plate It is possible to know the distribution of the ground pressure at the time of actual running of the tire 10 located approximately at the center of (1).
도 2는 본 발명의 측정방법에 따른 제어흐름을 나타낸 순서도인 바, 이를 참조하여 본 발명의 측정방법을 제어흐름에 따라 보다 상세히 설명해 보면, 제1열 압력센서(2a1)의 감지시점부터 타이어(10)가 접지판(1)의 중심에 위치되는 시점까지의 경과시간인 기준값(Nt)을 설정하고, 비교값(Nc)을 0으로 초기화 한 후, 차량을 주행한다.2 is a flow chart showing a control flow according to the measuring method of the present invention. Referring to this, the measuring method of the present invention will be described in detail according to the control flow, and the tire from the time of detecting the first thermal pressure sensor 2 a1 will be described. After setting the reference value Nt which is the elapsed time until the point where 10 is located at the center of the ground plate 1, and initializing the comparison value Nc to 0, the vehicle is driven.
이후, 제어기(6)에서 제1열 압력센서(2a1)의 측정값(Pa1)과 기본값(P0)를 비교하여, 적어도 어느 하나 이상의 제1열 압력센서(2a1)의 측정값(Pa1)이 기본값(P0)보다 클 경우에는 이하의 단계를 수행하고, 이를 만족하지 못한 경우에는 제1열 압력센서(2a1)의 측정값(Pa1)과 기본값(P0)의 비교작업을 반복적으로 수행한다. 여기서, 상기 기본값(P0)은 압력센서(2ab) 초기값으로 프로그램상에서 어느 한 값으로 셋팅되거나, 실험준비단계에서 임의로 설정할 수 있는데, 그 값으로는 통상 0이 이용되지만, 본 발명의 경우에는 실제 노면에서 차량을 직접 주행하는 방식이므로 실험중에 발생할 수 있는 오차를 감안하여 0 이외의 값으로도 설정할 수 있다.Thereafter, the controller 6 compares the measured value P a1 of the first thermal pressure sensor 2 a1 with the default value P 0 , thereby measuring the measured value of the at least one first thermal pressure sensor 2 a1 ( P a1) a comparison of the default value (P 0) measured values (P a1) and the default value (P 0) of the case is greater than, perform the following steps, and the failure to satisfy this requirement, the first heat-pressure sensor (2 a1) Repeat the operation. Here, the default value (P 0 ) may be set to any value in the program as an initial value of the pressure sensor (2 ab ) or arbitrarily set in an experimental preparation step, but the value 0 is generally used as the present invention. Since the vehicle is driven directly on the actual road surface, it can be set to a value other than 0 in consideration of errors that may occur during the experiment.
이후, 제1열 압력센서(2a1)의 측정값(Pa1)이 기본값(P0)보다 클 경우, 임의의 시간값(통상 1×10-4∼1×10-5sec)으로 경과시간을 카운트하여 비교값(Nc)으로 하고,카운트된 비교값(Nc)을 기준값(Nt)과 비교하여 비교값(Nc)이 기준값(Nt)보다 작은 경우에는 본 단계를 반복하고, 비교값(Nc)이 기준값(Nt)보다 크거나 같은 경우에는 이하의 단계를 수행한다. 여기서 상기 기준값(Nt)은 앞서 설명한 바와 같이 제1열 압력센서(2a1)의 감지시점부터 타이어(10)가 접지판(1)의 중심에 위치되는 시점까지의 경과시간이므로, 경과시간을 카운트한 비교값(Nc)이 기준값(Nt)과 같거나, 이를 처음으로 초과할 때는 타이어(10)가 접지판(1)의 중심에 위치된 상태이거나, 중심에서 약간 이격된 곳에 위치된 상태이다.After that, when the measured value P a1 of the first row pressure sensor 2 a1 is larger than the default value P 0 , the elapsed time is a random time value (usually 1 × 10 −4 to 1 × 10 −5 sec). Is counted as a comparison value Nc, the counted comparison value Nc is compared with the reference value Nt, and the comparison value Nc is repeated if the comparison value Nc is smaller than the reference value Nt. ) Is greater than or equal to the reference value Nt, the following steps are performed. The reference value Nt is the elapsed time from the time when the first row pressure sensor 2 a1 is detected to the time when the tire 10 is located at the center of the ground plate 1 as described above, so that the elapsed time is counted. When the comparison value Nc is equal to or exceeds the reference value Nt for the first time, the tire 10 is located at the center of the ground plate 1 or at a position slightly away from the center.
이후, 비교값(Nc)이 기준값(Nt)보다 크거나 같은 경우, 이 시점에서의 전체 압력센서(2ab)로부터의 측정값(Pab)만을 선택적으로 비교·연산처리하여 접지판(1)에 대한 타이어(10)의 접지압력분포를 산출한 후 이를 출력한다.Subsequently, when the comparison value Nc is greater than or equal to the reference value Nt, only the measured value P ab from the total pressure sensor 2 ab at this point in time is selectively compared and computed so that the ground plate 1 Calculate the ground pressure distribution of the tire 10 for and output it.
이와 같이 산출된 접지압력분포는 타이어(10)가 대략 접지판(1)의 중심에 위치된 상태에서의 것으로, 실제 주행시의 타이어(10)의 접지압력분포를 나타낸다.The ground pressure distribution calculated as described above is in a state where the tire 10 is located approximately at the center of the ground plate 1, and represents the ground pressure distribution of the tire 10 during actual driving.
본 발명은 상기 실시예에 한정되지 않고 이하의 청구범위를 벗어나지 않는 한도내에서 다양하게 변형 실시될 수 있는데, 일예로 제1열 압력센서(2a1)만을 별도로 분리하여 차량진행방향의 임의의 위치에 설치할 수 있음은 물론이다.The present invention is not limited to the above embodiments and may be variously modified without departing from the scope of the following claims. For example, any position in the vehicle traveling direction may be separately separated from the first row pressure sensor 2 a1 . Of course it can be installed on.
이상 상기한 바와 같은 본 발명에 따르면, 차량을 실제로 주행시켜서 타이어가 접지판을 통과하도록 하되, 접지판의 임의의 위치에 타이어가 도달된 시점에서의 압력센서들의 측정값만을 비교·연산처리하여 접지압력분포를 측정하는 방식이므로, 실제 주행에서의 모든 조건들이 고려된 접지압력분포 상태를 파악할 수 있다.According to the present invention as described above, the vehicle is actually driven so that the tire passes through the ground plate, but only the measured values of the pressure sensors at the point where the tire reaches an arbitrary position on the ground plate are compared and calculated and grounded. Since the pressure distribution is measured, it is possible to grasp the state of the ground pressure distribution considering all the conditions in actual driving.
따라서, 실험의 정확도와 신뢰성이 향상되고, 타이어의 성능향을 꾀할 수 있는 효과가 있다.Therefore, the accuracy and reliability of the test is improved, and there is an effect that the performance of the tire can be made.
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| KR1019990019423A KR100326299B1 (en) | 1999-05-28 | 1999-05-28 | Measuring method for ground contact pressure |
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| CN116358760B (en) * | 2023-06-01 | 2023-08-25 | 深圳亿维锐创科技股份有限公司 | Method, device, equipment and storage medium for measuring load distribution of vehicle tyre |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4630470A (en) * | 1984-11-16 | 1986-12-23 | The United States Of America As Represented By The Secretary Of The Army | Remote sensing of vehicle tire pressure |
| JPS63286724A (en) * | 1987-05-20 | 1988-11-24 | Kyowa Electronic Instr Corp Ltd | Method and device for measuring wheel load of running vehicle |
| JPH03226636A (en) * | 1990-02-01 | 1991-10-07 | Sumitomo Rubber Ind Ltd | Measuring apparatus for ground-contacting shape and grounding pressure of tire and sheet body for measuring grounding pressure of tire |
| JPH05248980A (en) * | 1991-11-29 | 1993-09-28 | Exxon Res & Eng Co | Tire pressure/car speed measuring apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4630470A (en) * | 1984-11-16 | 1986-12-23 | The United States Of America As Represented By The Secretary Of The Army | Remote sensing of vehicle tire pressure |
| JPS63286724A (en) * | 1987-05-20 | 1988-11-24 | Kyowa Electronic Instr Corp Ltd | Method and device for measuring wheel load of running vehicle |
| JPH03226636A (en) * | 1990-02-01 | 1991-10-07 | Sumitomo Rubber Ind Ltd | Measuring apparatus for ground-contacting shape and grounding pressure of tire and sheet body for measuring grounding pressure of tire |
| JPH05248980A (en) * | 1991-11-29 | 1993-09-28 | Exxon Res & Eng Co | Tire pressure/car speed measuring apparatus |
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