WO2018006549A1 - 轮胎状态检测方法及装置 - Google Patents
轮胎状态检测方法及装置 Download PDFInfo
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- WO2018006549A1 WO2018006549A1 PCT/CN2016/110062 CN2016110062W WO2018006549A1 WO 2018006549 A1 WO2018006549 A1 WO 2018006549A1 CN 2016110062 W CN2016110062 W CN 2016110062W WO 2018006549 A1 WO2018006549 A1 WO 2018006549A1
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- tire
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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
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- 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
Definitions
- the present invention relates to the field of vehicle detection technology, and in particular, to a tire condition detecting method and apparatus.
- a primary object of the present invention is to provide a tire condition detecting method and apparatus, which aim to solve the technical problem of more comprehensively detecting various states of a tire in a running state of the vehicle.
- the present invention provides a tire condition detecting method, and the tire condition detecting method includes:
- the tilt angle is analyzed according to a preset relationship between the tilt angle and the tire state, and the current tire state is determined, the tire state including at least one or more of tire wear, tire positioning, and tire air pressure.
- transmitting a plurality of radar waves to the tire in a rotating state comprises:
- the current tire speed is measured according to the current vehicle traveling speed and the tire size for adjusting the interval time of transmitting the radar wave, and according to the interval time, the radar wave is emitted to the tire in the rotating state.
- the calculating the tilt angle of the tire or the vehicle according to the distance comprises:
- the corresponding tilt angle is calculated according to the distance difference and the emission angle of the radar wave.
- the radar waves are transmitted in a symmetrical manner.
- the present invention also provides a tire condition detecting device, the tire state detecting device comprising:
- a detecting module configured to, when the vehicle is in a running state, emit a plurality of radar waves to the tire in a rotating state, and receive a corresponding reflected radar wave;
- a calculation module configured to calculate a distance between a radar emission point and a radar reflection point on the tire according to the information about the radar wave emitted and reflected, and calculate a tilt angle of the tire or the vehicle according to the distance;
- the state determining module is configured to analyze the tilt angle according to a preset relationship between the tilt angle and the tire state to determine a current tire state.
- the detecting module is further configured to:
- the current tire speed is measured according to the current vehicle traveling speed and the tire size for adjusting the interval time of transmitting the radar wave, and according to the interval time, the radar wave is emitted to the tire in the rotating state.
- the calculation module is further configured to:
- the corresponding tilt angle is calculated according to the distance difference and the emission angle of the radar wave.
- the radar waves are transmitted in a symmetrical manner.
- the invention adopts the method of transmitting radar waves, calculates the inclination angle of the tire or the vehicle according to the distance between the radar emission point and the radar reflection point on the tire, and then passes the analysis relationship according to the corresponding relationship between the preset inclination angle and the tire state.
- the angle of inclination is determined to determine the current tire condition.
- the invention can realize the tire state judgment in the running of the automobile, thereby providing the vehicle owner with a safe driving environment.
- FIG. 1 is a schematic flow chart of an embodiment of a tire condition detecting method according to the present invention.
- FIG. 2 is a schematic diagram of the refinement process of step S20 in Figure 1;
- FIG. 3 is a schematic diagram of functional modules of an embodiment of a tire condition detecting apparatus of the present invention.
- the tire condition detecting method includes:
- Step S10 when the vehicle is in a running state, transmitting a plurality of radar waves to the tire in a rotating state, and receiving a corresponding reflected radar wave;
- each wheel or each group of wheels corresponds to a radar transceiver; for example, the radar transceiver is mounted on the vehicle chassis.
- a change in the state of the tire will result in a change in the shape of the tire and even a tilting of the vehicle as a whole.
- tire wear will result in a decrease in the thickness of the tire, that is, a decrease in the ground clearance; for example, insufficient tire pressure will cause the tire to exhibit a flat change, that is, the tire and the ground contact portion become more curved.
- the determination of the state of the tire of the vehicle is indirectly realized by the method of transmitting the radar wave based on various characteristics caused by the above-described change in the state of the tire.
- electromagnetic waves having a higher transmission power and a more linear deviation of the propagation path are preferred in this embodiment.
- the multiple times of transmitting the radar wave can detect different positions on the tire, and then synthesize the received reflected radar waves and calculate the corresponding radar emission. Point to the distance between the radar reflection points on the tire, or adjust the launch angle of the radar wave to calculate the distance between the corresponding radar launch point and the radar reflection point on the tire.
- Step S20 calculating a distance between a radar emission point and a radar reflection point on the tire according to the information about the radar wave transmitted and reflected, and calculating a tilt angle of the tire or the vehicle according to the distance;
- the tilt angle of the tire or the vehicle can be calculated according to the calculated distance between the radar launch point and the radar reflection point on the tire, and the specific calculation manner is not limited. Among them, there are many reasons for the tire to be tilted, such as unevenness of the road surface, improper positioning of the tire, etc. If the radar transceiver transmits radar waves to the side of the tire in a manner parallel to the ground plane, if the tire is not tilted, the tire is on the tire. The distance between each radar reflection point and the radar emission point should be theoretically the same, and if not the same, it is determined that the tire has tilted. Similarly, when the tire wears out or the tire pressure is insufficient, the vehicle will be tilted. Specifically, the corresponding tilt angle can be calculated from the distance between the radar launch point and the radar reflection point on the tire.
- the distance L in different time periods may be further compared, and if the distance change ⁇ L in different time periods exceeds a certain preset value, it is determined that the tire state changes.
- Step S30 analyzing the tilt angle according to a preset relationship between the tilt angle and the tire state to determine a current tire state, the tire state including at least one of tire wear, tire positioning, and tire air pressure.
- the tilt angle described in this embodiment includes not only the angle value but also the tilt direction.
- the front left tire is tilted
- the front right tire and the rear right tire are tilted in the direction of the front left tire to determine that the front left tire has insufficient tire pressure.
- the radar wave is transmitted in a symmetrical manner to Improve the accuracy of the analysis results. For example, firing a symmetrical tire, or simultaneously transmitting a radar wave to a symmetrical position of the same tire.
- the method of transmitting a radar wave is used to calculate the inclination angle of the tire or the vehicle according to the distance between the radar emission point and the radar reflection point on the tire, and then according to the corresponding relationship between the preset inclination angle and the tire state.
- the current tire condition is determined by analyzing the tilt angle.
- the step S10 further includes:
- the current tire speed is measured according to the current vehicle traveling speed and the tire size for adjusting the interval time of transmitting the radar wave, and according to the interval time, the radar wave is emitted to the tire in the rotating state.
- the radar reflection point In order to ensure the effectiveness of radar wave transmission, for example, the radar reflection point needs to be located in a plurality of different regions of the tire, therefore, it is necessary to determine the transmission interval of the radar wave.
- the current tire speed is measured according to the current vehicle traveling speed and the tire size, and the interval time of transmitting the radar wave is adjusted according to the current tire speed, thereby ensuring that the radar reflection points on the tire do not overlap. It also covers the entire tire area.
- FIG. 2 is a schematic diagram showing the refinement process of step S20 in FIG. Based on the foregoing embodiments of the foregoing method, in the embodiment, the foregoing step S20 includes:
- Step S201 calculating a distance difference between radar reflection points according to the distance corresponding to the plurality of radar reflection points
- Step S202 when the distance difference exceeds a preset difference, determining that the tire or the vehicle is tilted;
- Step S203 calculating a corresponding tilt angle according to the distance and the emission angle of the radar wave.
- the shape change on the tire can be indirectly measured by the distance difference between the radar reflection points.
- a preset difference may be correspondingly set, and if the distance difference exceeds the preset difference, it is determined that the tire or the vehicle is tilted. If it is determined that the tire or the vehicle is tilted, the tilt angle of the tire or the vehicle can be calculated according to the radar distance and the launch angle of the radar wave, and the specific calculation process is not described too much.
- the deformation of the vehicle tire is affected by the weight of the vehicle, that is, the deformation is concentrated on the ground contact portion. Therefore, in order to avoid misjudgment, the data of the four tires can be integrated for comprehensive comparison determination.
- the radiation angle of the radar transceiver device it is possible to keep the radiation angle of the radar transceiver device unchanged, thereby detecting a special state on the tire, which does not change position with the rotation of the tire, such as a tire bulge, a crack, or the like.
- FIG. 3 is a schematic diagram of functional modules of an embodiment of a tire condition detecting apparatus according to the present invention.
- the tire condition detecting device includes:
- the detecting module 10 is configured to, when the vehicle is in a running state, emit a plurality of radar waves to the tire in a rotating state, and receive a corresponding reflected radar wave;
- each wheel or each group of wheels corresponds to a radar transceiver; for example, the radar transceiver is mounted on the vehicle chassis.
- a change in the state of the tire will result in a change in the shape of the tire and even a tilting of the vehicle as a whole.
- tire wear will result in a decrease in the thickness of the tire, that is, a decrease in the ground clearance; for example, insufficient tire pressure will cause the tire to exhibit a flat change, that is, the tire and the ground contact portion become more curved.
- the determination of the state of the tire of the vehicle is indirectly realized by the method of transmitting the radar wave based on various characteristics caused by the above-described change in the state of the tire.
- electromagnetic waves having a higher transmission power and a more linear deviation of the propagation path are preferred in this embodiment.
- the multiple times of transmitting the radar wave can detect different positions on the tire, and then synthesize the received reflected radar waves and calculate the corresponding radar emission. Point to the distance between the radar reflection points on the tire, or adjust the launch angle of the radar wave to calculate the distance between the corresponding radar launch point and the radar reflection point on the tire.
- the calculating module 20 is configured to calculate a distance between a radar transmitting point and a radar reflection point on the tire according to the information about the radar wave transmitted and reflected, and calculate a tilt angle of the tire or the vehicle according to the distance;
- the tilt angle of the tire or the vehicle can be calculated according to the calculated distance between the radar launch point and the radar reflection point on the tire, and the specific calculation manner is not limited. Among them, there are many reasons for the tire to be tilted, such as unevenness of the road surface, improper positioning of the tire, etc. If the radar transceiver transmits radar waves to the side of the tire in a manner parallel to the ground plane, if the tire is not tilted, the tire is on the tire. The distance between each radar reflection point and the radar emission point should be theoretically the same, and if not the same, it is determined that the tire has tilted. Similarly, when the tire wears out or the tire pressure is insufficient, the vehicle will be tilted. Specifically, the corresponding tilt angle can be calculated from the distance between the radar launch point and the radar reflection point on the tire.
- the distance L in different time periods may be further compared, and if the distance change ⁇ L in different time periods exceeds a certain preset value, it is determined that the tire state changes.
- the state determining module 30 is configured to analyze the tilt angle according to a preset relationship between the tilt angle and the tire state to determine a current tire state.
- the tilt angle described in this embodiment includes not only the angle value but also the tilt direction.
- the front left tire is tilted
- the front right tire and the rear right tire are tilted in the direction of the front left tire to determine that the front left tire has insufficient tire pressure.
- the radar wave is transmitted in a symmetrical manner to Improve the accuracy of the analysis results. For example, firing a symmetrical tire, or simultaneously transmitting a radar wave to a symmetrical position of the same tire.
- the method of transmitting a radar wave is used to calculate the inclination angle of the tire or the vehicle according to the distance between the radar emission point and the radar reflection point on the tire, and then according to the corresponding relationship between the preset inclination angle and the tire state.
- the current tire condition is determined by analyzing the tilt angle.
- the detecting module 10 is further configured to: when the vehicle is in a running state, measure the current tire speed according to the current vehicle traveling speed and the tire size for adjusting the transmitting radar. The interval of the waves, and according to the interval time, the radar waves are emitted to the tires in a rotating state.
- the radar reflection point In order to ensure the effectiveness of radar wave transmission, for example, the radar reflection point needs to be located in a plurality of different regions of the tire, therefore, it is necessary to determine the transmission interval of the radar wave.
- the current tire speed is measured according to the current vehicle traveling speed and the tire size, and the interval time of transmitting the radar wave is adjusted according to the current tire speed, thereby ensuring that the radar reflection points on the tire do not overlap. It also covers the entire tire area.
- the calculating module 20 is further configured to:
- the corresponding tilt angle is calculated according to the distance and the emission angle of the radar wave.
- the shape change on the tire can be indirectly measured by the distance difference between the radar reflection points.
- a preset difference may be correspondingly set, and if the distance difference exceeds the preset difference, it is determined that the tire or the vehicle is tilted. If it is determined that the tire or the vehicle is tilted, the tilt angle of the tire or the vehicle can be calculated according to the radar distance and the launch angle of the radar wave, and the specific calculation process is not described too much.
- the deformation of the vehicle tire is affected by the weight of the vehicle, that is, the deformation is concentrated on the ground contact portion. Therefore, in order to avoid misjudgment, the data of the four tires can be integrated for comprehensive comparison determination.
- the radiation angle of the radar transceiver device it is possible to keep the radiation angle of the radar transceiver device unchanged, thereby detecting a special state on the tire, which does not change position with the rotation of the tire, such as a tire bulge, a crack, or the like.
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Abstract
一种轮胎状态检测方法及相应的检测装置，包括：当车辆处于行驶状态时，向处于旋转状态的轮胎发射多个雷达波，并接收对应反射的雷达波；根据发射与反射的雷达波的相关信息，计算雷达发射点到轮胎上雷达反射点之间的距离，并根据所述距离，计算轮胎或车辆的倾斜角度；根据预置的倾斜角度与轮胎状态的对应关系，分析所述倾斜角度，确定当前的轮胎状态，所述轮胎状态至少包括轮胎磨损、轮胎定位、轮胎气压中的一种或多种。该轮胎状态检测方法和装置能够实现汽车行驶中的轮胎状态判断，从而为车主提供安全驾驶环境。
Description
技术领域
本发明涉及车辆检测技术领域，尤其涉及轮胎状态检测方法及装置。
背景技术
轮胎状态的良好是车辆安全行驶的首要保障。现有轮胎状态检测技术中，通常都是在车辆处于静止状态下进行的，且大都采用人工识别方式进行检测。而在实际情况中，即使在行驶状态下用户对于轮胎状态也有着非常高的了解需求，但现有方式中仅仅只能实现对于某一类型轮胎状态的检测，比如胎压、胎温检测等，因而不能更为全面地了解轮胎的各类状态。
发明内容
本发明的主要目的在于提供一种轮胎状态检测方法及装置，旨在解决在车辆行驶状态下，更为全面地检测轮胎多种状态的技术问题。
为实现上述目的，本发明提供一种轮胎状态检测方法，所述轮胎状态检测方法包括：
当车辆处于行驶状态时，向处于旋转状态的轮胎发射多个雷达波，并接收对应反射的雷达波；
根据发射与反射的雷达波的相关信息，计算雷达发射点到轮胎上雷达反射点之间的距离，并根据所述距离，计算轮胎或车辆的倾斜角度；
根据预置的倾斜角度与轮胎状态的对应关系，分析所述倾斜角度，确定当前的轮胎状态，所述轮胎状态至少包括轮胎磨损、轮胎定位、轮胎气压中的一种或多种。
优选地，所述当车辆处于行驶状态时，向处于旋转状态的轮胎发射多个雷达波包括：
当车辆处于行驶状态时，根据当前车辆行驶速度及轮胎尺寸，测算当前轮胎转速以供调整发射雷达波的间隔时间，并根据所述间隔时间，向处于旋转状态的轮胎发射雷达波。
优选地，所述根据所述距离，计算轮胎或车辆的倾斜角度包括：
根据多个雷达反射点所对应的所述距离，计算雷达反射点之间的距离差；
当所述距离差超过预设差值时，确定轮胎或车辆发生倾斜；
根据所述距离差、雷达波的发射角度，计算对应的倾斜角度。
优选地，采用对称方式发射雷达波。
进一步地，为实现上述目的，本发明还提供一种轮胎状态检测装置，所述轮胎状态检测装置包括：
检测模块，用于当车辆处于行驶状态时，向处于旋转状态的轮胎发射多个雷达波，并接收对应反射的雷达波；
计算模块，用于根据发射与反射的雷达波的相关信息，计算雷达发射点到轮胎上雷达反射点之间的距离，并根据所述距离，计算轮胎或车辆的倾斜角度；
状态确定模块，用于根据预置的倾斜角度与轮胎状态的对应关系，分析所述倾斜角度，确定当前的轮胎状态。
优选地，所述检测模块还用于：
当车辆处于行驶状态时，根据当前车辆行驶速度及轮胎尺寸，测算当前轮胎转速以供调整发射雷达波的间隔时间，并根据所述间隔时间，向处于旋转状态的轮胎发射雷达波。
优选地，所述计算模块还用于：
根据多个雷达反射点所对应的所述距离，计算雷达反射点之间的距离差；
当所述距离差超过预设差值时，确定轮胎或车辆发生倾斜；
根据所述距离差、雷达波的发射角度，计算对应的倾斜角度。
优选地，采用对称方式发射雷达波。
本发明采用发射雷达波的方式，根据雷达发射点到轮胎上雷达反射点之间的距离，计算轮胎或车辆的倾斜角度，进而再根据预置的倾斜角度与轮胎状态的对应关系，通过分析所述倾斜角度，从而确定当前的轮胎状态。本发明能够实现汽车行驶中的轮胎状态判断，从而为车主提供安全驾驶环境。
附图说明
图1为本发明轮胎状态检测方法一实施例的流程示意图；
图2图1中步骤S20的细化流程示意图；
图3为本发明轮胎状态检测装置一实施例的功能模块示意图。
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。
参照图1，图1为本发明轮胎状态检测方法一实施例的流程示意图。本实施例中，所述轮胎状态检测方法包括：
步骤S10，当车辆处于行驶状态时，向处于旋转状态的轮胎发射多个雷达波，并接收对应反射的雷达波；
本实施例中，对于雷达收发装置的数量、安装位置、雷达波的类型以及雷达的发射方式不限，具体根据实际需要进行设置。比如每一车轮或每一组车轮对应一雷达收发装置；比如将雷达收发装置安装在车辆底盘上等。
通常，轮胎的状态发生变化将相应导致轮胎的外形发生变化，甚至导致车辆整体发生倾斜。例如轮胎磨损将导致轮胎的厚度减小，也即离地间隙降低；比如，轮胎的胎压不足，将导致轮胎呈现扁平的变化，也即轮胎与地面接触部分变得更加的弯曲。
因此，本实施例中，基于上述轮胎状态变化所导致的各种特征，通过发射雷达波的方式间接实现对车辆轮胎状态的判断。
为避免雷达波在传播过程中的耗损，因此，本实施例中优选发射功率更高、传播路径更偏向直线的电磁波。同时，车辆在行驶过程中，若保持雷达收发装的发射位置不变，则多次发射雷达波可对应检测轮胎上的不同位置，进而综合各次接收到的反射雷达波，计算对应的雷达发射点到轮胎上雷达反射点之间的距离，或者调整雷达波的发射角度，以计算对应的雷达发射点到轮胎上雷达反射点之间的距离。
步骤S20，根据发射与反射的雷达波的相关信息，计算雷达发射点到轮胎上雷达反射点之间的距离，并根据所述距离，计算轮胎或车辆的倾斜角度；
本实施例中，具体可根据雷达波的发射时间、反射时间，确定雷达发射点到轮胎上雷达反射点之间的距离。假设距离为L，发射时间为t1，反射时间为t2，则L=（t2-t1）*C，C为光速。
本实施例中，根据计算的到的雷达发射点到轮胎上雷达反射点之间的距离，即可计算轮胎或车辆的倾斜角度，具体计算方式不限。其中，造成轮胎发生倾斜的原因很多，例如路面的不平整、轮胎安装定位不正等，若雷达收发装置以平行于地平面的方式向轮胎侧面部分发射雷达波，若轮胎未发生倾斜，则轮胎上各雷达反射点到雷达发射点之间的距离理论上应是相同的，而若不相同，则确定轮胎发生了倾斜。同理，当轮胎发生磨损或胎压不足时，将导致车辆发生倾斜，具体也可通过雷达发射点到轮胎上雷达反射点之间的距离计算得到对应的倾斜角度。
此外，本实施例中还可以进一步根据比对不同时间段内的距离L，若不同时间段内的距离变化△L超过某预设值，则确定轮胎状态发生变化。
步骤S30，根据预置的倾斜角度与轮胎状态的对应关系，分析所述倾斜角度，确定当前的轮胎状态，所述轮胎状态至少包括轮胎磨损、轮胎定位、轮胎气压中的一种或多种。
本实施例中，可预先根据采集的样本数据，进行统计分析，从而得到倾斜角度与轮胎状态的对应关系。需要说明的是，本实施例中所述的倾斜角度不仅包括角度值，还包括倾斜的方向。比如，前左轮胎发生倾斜，同时前右轮胎，后右轮胎都向前左轮胎方向发生倾斜，则可确定前左轮胎的胎压不足。
可选的，基于轮胎的对称性（圆形）以及车辆轮胎的对称性（前面两个轮胎对称，后面两个轮胎对称，或者四个轮胎都对称），因此，采用对称方式发射雷达波，以提高分析结果的准确性。例如，分别向对称的轮胎发射，或者同时向同一轮胎的对称位置发射雷达波。
本实施例中，采用发射雷达波的方式，根据雷达发射点到轮胎上雷达反射点之间的距离，计算轮胎或车辆的倾斜角度，进而再根据预置的倾斜角度与轮胎状态的对应关系，通过分析所述倾斜角度，从而确定当前的轮胎状态。本实施例能够实现汽车行驶中的轮胎状态判断，从而为车主提供安全驾驶环境。
可选的，在本发明轮胎状态检测方法一实施例中，基于上述方法第一实施例，本实施例中，上述步骤S10进一步包括：
当车辆处于行驶状态时，根据当前车辆行驶速度及轮胎尺寸，测算当前轮胎转速以供调整发射雷达波的间隔时间，并根据所述间隔时间，向处于旋转状态的轮胎发射雷达波。
为保证雷达波发射的有效性，比如雷达反射点需要位于轮胎的多个不同区域位置，因此，需要确定雷达波的发射间隔时间。本实施例中，当车辆行驶过程中，根据当前车辆行驶速度及轮胎尺寸，测算当前轮胎转速，并根据当前轮胎转速来调整发射雷达波的间隔时间，从而保证轮胎上的雷达反射点不重叠、同时能够覆盖整个轮胎区域。
参照图2，图2图1中步骤S20的细化流程示意图。基于上述方法各实施例，本实施例中，上述步骤S20包括：
步骤S201，根据多个雷达反射点所对应的所述距离，计算雷达反射点之间的距离差；
步骤S202，当所述距离差超过预设差值时，确定轮胎或车辆发生倾斜；
步骤S203，根据所述距离、雷达波的发射角度，计算对应的倾斜角度。
本实施例中，由于轮胎状态发生变化，从而导致轮胎外形产生相应变化，因此，轮胎上的外形变化具体可通过雷达反射点之间的距离差进行间接衡量。同时，为避免产生误判，可对应设置一预设差值，若该距离差值超过该预设差值，则确定轮胎或车辆发生倾斜。若确定轮胎或车辆发生倾斜，则可根据雷达距离、雷达波的发射角度，计算轮胎或车辆的倾斜角度，具体计算过程不做过多赘述。
本实施例中，考虑到车辆轮胎受车辆重量影响而发生形变，也即形变集中在于地面接触部分，因此，为避免误判，可综合四个轮胎的数据进行综合比对确定。
此外，本实施例中，既可以是保持雷达收发装置的发射角度不变，从而检测轮胎上的特殊状态，该特殊状态不随轮胎的旋转而发生位置变化，例如轮胎鼓包、裂纹等。同时，还可以通过调整雷达收发装置的发射角度，从而实现对轮胎不同位置区域的检测，比如检测轮胎与地面接触位置区域以及非接触位置区域，从而根据对应确定的倾斜角度判断轮胎的胎压是否充足等。
参照图3，图3为本发明轮胎状态检测装置一实施例的功能模块示意图。所述轮胎状态检测装置包括：
检测模块10，用于当车辆处于行驶状态时，向处于旋转状态的轮胎发射多个雷达波，并接收对应反射的雷达波；
本实施例中，对于雷达收发装置的数量、安装位置、雷达波的类型以及雷达的发射方式不限，具体根据实际需要进行设置。比如每一车轮或每一组车轮对应一雷达收发装置；比如将雷达收发装置安装在车辆底盘上等。
通常，轮胎的状态发生变化将相应导致轮胎的外形发生变化，甚至导致车辆整体发生倾斜。例如轮胎磨损将导致轮胎的厚度减小，也即离地间隙降低；比如，轮胎的胎压不足，将导致轮胎呈现扁平的变化，也即轮胎与地面接触部分变得更加的弯曲。
因此，本实施例中，基于上述轮胎状态变化所导致的各种特征，通过发射雷达波的方式间接实现对车辆轮胎状态的判断。
为避免雷达波在传播过程中的耗损，因此，本实施例中优选发射功率更高、传播路径更偏向直线的电磁波。同时，车辆在行驶过程中，若保持雷达收发装的发射位置不变，则多次发射雷达波可对应检测轮胎上的不同位置，进而综合各次接收到的反射雷达波，计算对应的雷达发射点到轮胎上雷达反射点之间的距离，或者调整雷达波的发射角度，以计算对应的雷达发射点到轮胎上雷达反射点之间的距离。
计算模块20，用于根据发射与反射的雷达波的相关信息，计算雷达发射点到轮胎上雷达反射点之间的距离，并根据所述距离，计算轮胎或车辆的倾斜角度；
本实施例中，具体可根据雷达波的发射时间、反射时间，确定雷达发射点到轮胎上雷达反射点之间的距离。假设距离为L，发射时间为t1，反射时间为t2，则L=（t2-t1）*C，C为光速。
本实施例中，根据计算的到的雷达发射点到轮胎上雷达反射点之间的距离，即可计算轮胎或车辆的倾斜角度，具体计算方式不限。其中，造成轮胎发生倾斜的原因很多，例如路面的不平整、轮胎安装定位不正等，若雷达收发装置以平行于地平面的方式向轮胎侧面部分发射雷达波，若轮胎未发生倾斜，则轮胎上各雷达反射点到雷达发射点之间的距离理论上应是相同的，而若不相同，则确定轮胎发生了倾斜。同理，当轮胎发生磨损或胎压不足时，将导致车辆发生倾斜，具体也可通过雷达发射点到轮胎上雷达反射点之间的距离计算得到对应的倾斜角度。
此外，本实施例中还可以进一步根据比对不同时间段内的距离L，若不同时间段内的距离变化△L超过某预设值，则确定轮胎状态发生变化。
状态确定模块30，用于根据预置的倾斜角度与轮胎状态的对应关系，分析所述倾斜角度，确定当前的轮胎状态。
本实施例中，可预先根据采集的样本数据，进行统计分析，从而得到倾斜角度与轮胎状态的对应关系。需要说明的是，本实施例中所述的倾斜角度不仅包括角度值，还包括倾斜的方向。比如，前左轮胎发生倾斜，同时前右轮胎，后右轮胎都向前左轮胎方向发生倾斜，则可确定前左轮胎的胎压不足。
可选的，基于轮胎的对称性（圆形）以及车辆轮胎的对称性（前面两个轮胎对称，后面两个轮胎对称，或者四个轮胎都对称），因此，采用对称方式发射雷达波，以提高分析结果的准确性。例如，分别向对称的轮胎发射，或者同时向同一轮胎的对称位置发射雷达波。
本实施例中，采用发射雷达波的方式，根据雷达发射点到轮胎上雷达反射点之间的距离，计算轮胎或车辆的倾斜角度，进而再根据预置的倾斜角度与轮胎状态的对应关系，通过分析所述倾斜角度，从而确定当前的轮胎状态。本实施例能够实现汽车行驶中的轮胎状态判断，从而为车主提供安全驾驶环境。
可选的，在本发明轮胎状态检测装置一实施例中，所述检测模块10还用于：当车辆处于行驶状态时，根据当前车辆行驶速度及轮胎尺寸，测算当前轮胎转速以供调整发射雷达波的间隔时间，并根据所述间隔时间，向处于旋转状态的轮胎发射雷达波。
为保证雷达波发射的有效性，比如雷达反射点需要位于轮胎的多个不同区域位置，因此，需要确定雷达波的发射间隔时间。本实施例中，当车辆行驶过程中，根据当前车辆行驶速度及轮胎尺寸，测算当前轮胎转速，并根据当前轮胎转速来调整发射雷达波的间隔时间，从而保证轮胎上的雷达反射点不重叠、同时能够覆盖整个轮胎区域。
可选的，在本发明轮胎状态检测装置一实施例中，所述计算模块20还用于：
根据多个雷达反射点所对应的所述距离，计算雷达反射点之间的距离差；
当所述距离差超过预设差值时，确定轮胎或车辆发生倾斜；
根据所述距离、雷达波的发射角度，计算对应的倾斜角度。
本实施例中，由于轮胎状态发生变化，从而导致轮胎外形产生相应变化，因此，轮胎上的外形变化具体可通过雷达反射点之间的距离差进行间接衡量。同时，为避免产生误判，可对应设置一预设差值，若该距离差值超过该预设差值，则确定轮胎或车辆发生倾斜。若确定轮胎或车辆发生倾斜，则可根据雷达距离、雷达波的发射角度，计算轮胎或车辆的倾斜角度，具体计算过程不做过多赘述。
本实施例中，考虑到车辆轮胎受车辆重量影响而发生形变，也即形变集中在于地面接触部分，因此，为避免误判，可综合四个轮胎的数据进行综合比对确定。
此外，本实施例中，既可以是保持雷达收发装置的发射角度不变，从而检测轮胎上的特殊状态，该特殊状态不随轮胎的旋转而发生位置变化，例如轮胎鼓包、裂纹等。同时，还可以通过调整雷达收发装置的发射角度，从而实现对轮胎不同位置区域的检测，比如检测轮胎与地面接触位置区域以及非接触位置区域，从而根据对应确定的倾斜角度判断轮胎的胎压是否充足等。
以上仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。
Claims (16)
- 一种轮胎状态检测方法，其特征在于，所述轮胎状态检测方法包括：当车辆处于行驶状态时，向处于旋转状态的轮胎发射多个雷达波，并接收对应反射的雷达波；根据发射与反射的雷达波的相关信息，计算雷达发射点到轮胎上雷达反射点之间的距离，并根据所述距离，计算轮胎或车辆的倾斜角度；根据预置的倾斜角度与轮胎状态的对应关系，分析所述倾斜角度，确定当前的轮胎状态，所述轮胎状态至少包括轮胎磨损、轮胎定位、轮胎气压中的一种或多种。
- 如权利要求1所述的轮胎状态检测方法，其特征在于，所述当车辆处于行驶状态时，向处于旋转状态的轮胎发射多个雷达波包括：当车辆处于行驶状态时，根据当前车辆行驶速度及轮胎尺寸，测算当前轮胎转速以供调整发射雷达波的间隔时间，并根据所述间隔时间，向处于旋转状态的轮胎发射雷达波。
- 如权利要求1所述的轮胎状态检测方法，其特征在于，所述根据所述距离，计算轮胎或车辆的倾斜角度包括：根据多个雷达反射点所对应的所述距离，计算雷达反射点之间的距离差；当所述距离差超过预设差值时，确定轮胎或车辆发生倾斜；根据所述距离差、雷达波的发射角度，计算对应的倾斜角度。
- 如权利要求2所述的轮胎状态检测方法，其特征在于，所述根据所述距离，计算轮胎或车辆的倾斜角度包括：根据多个雷达反射点所对应的所述距离，计算雷达反射点之间的距离差；当所述距离差超过预设差值时，确定轮胎或车辆发生倾斜；根据所述距离差、雷达波的发射角度，计算对应的倾斜角度。
- 如权利要求1所述的轮胎状态检测方法，其特征在于，采用对称方式发射雷达波。
- 如权利要求2所述的轮胎状态检测方法，其特征在于，采用对称方式发射雷达波。
- 如权利要求3所述的轮胎状态检测方法，其特征在于，采用对称方式发射雷达波。
- 如权利要求4所述的轮胎状态检测方法，其特征在于，采用对称方式发射雷达波。
- 一种轮胎状态检测装置，其特征在于，所述轮胎状态检测装置包括：检测模块，用于当车辆处于行驶状态时，向处于旋转状态的轮胎发射多个雷达波，并接收对应反射的雷达波；计算模块，用于根据发射与反射的雷达波的相关信息，计算雷达发射点到轮胎上雷达反射点之间的距离，并根据所述距离，计算轮胎或车辆的倾斜角度；状态确定模块，用于根据预置的倾斜角度与轮胎状态的对应关系，分析所述倾斜角度，确定当前的轮胎状态。
- 如权利要求9所述的轮胎状态检测装置，其特征在于，所述检测模块还用于：当车辆处于行驶状态时，根据当前车辆行驶速度及轮胎尺寸，测算当前轮胎转速以供调整发射雷达波的间隔时间，并根据所述间隔时间，向处于旋转状态的轮胎发射雷达波。
- 如权利要求9所述的轮胎状态检测装置，其特征在于，所述计算模块还用于：根据多个雷达反射点所对应的所述距离，计算雷达反射点之间的距离差；当所述距离差超过预设差值时，确定轮胎或车辆发生倾斜；根据所述距离差、雷达波的发射角度，计算对应的倾斜角度。
- 如权利要求10所述的轮胎状态检测装置，其特征在于，所述计算模块还用于：根据多个雷达反射点所对应的所述距离，计算雷达反射点之间的距离差；当所述距离差超过预设差值时，确定轮胎或车辆发生倾斜；根据所述距离差、雷达波的发射角度，计算对应的倾斜角度。
- 如权利要求9所述的轮胎状态检测装置，其特征在于，采用对称方式发射雷达波。
- 如权利要求10所述的轮胎状态检测装置，其特征在于，采用对称方式发射雷达波。
- 如权利要求11所述的轮胎状态检测装置，其特征在于，采用对称方式发射雷达波。
- 如权利要求12所述的轮胎状态检测装置，其特征在于，采用对称方式发射雷达波。
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| JP7332861B2 (ja) * | 2019-06-03 | 2023-08-24 | 横浜ゴム株式会社 | タイヤ故障予知システム、タイヤ故障予知方法 |
| JP7336016B2 (ja) * | 2019-07-15 | 2023-08-30 | ファイヤーストーン インダストリアル プロダクツ カンパニー エルエルシー | ミリメートル波長レーダを使用した内部膨張高さ及び接触パッチセンサを含む車両用タイヤ組立体 |
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| Publication number | Publication date |
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| CN106183662B (zh) | 2018-10-30 |
| CN106183662A (zh) | 2016-12-07 |
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