1754results about "Tyre measurements" patented technology

The invention relates to a tire pressure monitoring method and system, a storage medium and a vehicle, and belongs to the technical field of tire pressure monitoring. Performing image processing on the tire grounding state image to obtain a grounding contour, and fitting the grounding contour into an ellipse to obtain long axis and short axis parameters of the ellipse; calculating a deformation ratio based on long-axis and short-axis parameters of the ellipse; calculating the current tire pressure through a pre-constructed tire pressure calculation model based on the deformation ratio; and judging whether the slow air leakage phenomenon exists in the tire according to the current tire pressure and the standard tire pressure. According to the method, the tire grounding state image can be obtained in real time without adding extra hardware, the cost is reduced by analyzing the tire deformation and judging the current tire pressure state, the influence of low temperature is considered, the slow air leakage condition can be detected, and the monitoring precision is improved.

The invention discloses a wireless relay method, system and equipment for commercial vehicle tire pressure monitoring and a medium, relates to the technical field of commercial vehicle tire pressure monitoring, and solves the problems of poor system adaptability and unreliable real-time alarm caused by the fact that existing commercial vehicle tire pressure monitoring needs trailer transformation and wireless transmission is easy to conflict. The method specifically comprises the steps that ACL connection is established between a tire pressure receiving node and a wireless relay node, and channel scheduling parameters and tire pressure sensor working parameters are issued to the wireless relay node; the wireless relay node sends a report request message to the tire pressure sensor on a specified channel according to a preset period; after each tire pressure sensor receives the message, reporting tire pressure monitoring data in the exclusive response time slot, and if the tire pressure sensor detects a tire burst early warning event, repeatedly reporting the tire pressure monitoring data in the tire burst reporting time slot; the wireless relay node packages the data and sends the data to a tire pressure receiving node for receiving and processing, and if it is judged that a tire burst early warning event exists, an alarm is given within 100 ms. The method is used for monitoring the tire pressure of the commercial vehicle.

The invention relates to a vehicle static tire pressure monitoring method and device and a self-powered system thereof.The method comprises the steps that vehicle state information is obtained, and whether a vehicle enters a static state or not is judged according to the vehicle state information; after it is judged that the vehicle enters the static state, the tire pressure monitoring mode is switched to a static mode from a dynamic mode, tire pressure and temperature data are collected in the static mode, and the sampling frequency of the static mode is higher than that of the dynamic mode; energy support is provided for data acquisition in a static mode through a self-power supply system, and the self-power supply system at least partially converts mechanical energy generated during tire deformation into electric energy; according to the tire pressure and temperature data, the actual air leakage rate of the tire is determined through a temperature compensation algorithm; and triggering early warning information of a corresponding level according to the actual gas leakage rate.

An external TPMS sensor for heavy-duty trucks comprises a helical antenna and a 1225 cell, and is installed outside a tire of a vehicle; and system power consumption is reduced by increasing the communication rate of the TPMS sensor, and / or decreasing the sampling period, and / or decreasing the number of data frames transmitted every time, and / or decreasing RF output power, and / or disposing an LNA circuit at an input terminal of a corresponding receiver antenna. The requirement of the TPMS sensor for a long service life is met by reducing system power consumption; the helical antenna, the matching network, and the 5 dBm chip for outputting power are used to realize miniaturization of the TPMS sensor; and the 1225 cell is used, which, compared with traditional TPMS sensors, allows the diameter of the TPMS sensor to be reduced by about 8 mm and the weight of the TPMS sensor to be reduced by over ⅓, such that miniaturization of the TPMS sensor is further realized.

The invention relates to the technical field of vehicle control, and provides a vehicle tire pressure adjusting method and a vehicle. Vehicle running data and a road topographic image in front of the vehicle are obtained, so that the vehicle trapping risk of the vehicle is predicted, and vehicle trapping probability information of the vehicle is obtained; according to the method, the vehicle trapping risk of the vehicle can be predicted in advance, the accuracy of vehicle trapping risk prediction is ensured through environmental perception and operation data, and the vehicle trapping risk prediction accuracy is improved. The tire pressure adjusting quantity is determined in time according to the vehicle sinking probability information and the vehicle operation data, so that the tire pressure adjusting accuracy is ensured, the purpose of timely intervention before the vehicle sinking is achieved, the vehicle sinking caused by mismatching of the tire pressure under the complex road conditions such as sand and mud is avoided, the vehicle escaping capability is improved, and the vehicle safety is improved. And the trafficability of the vehicle under various complex road conditions is improved.

A rotary sealing assembly comprises a static sealing ring cover and a movable sealing ring cover, the static sealing ring cover is provided with an air inlet channel connected with an external air supply source, the movable sealing ring cover is provided with an air outlet channel connected with the interior of a tire, and a sealing assembly is arranged between the static sealing ring cover and the movable sealing ring cover. The sealing assembly is used for achieving airtight sealing of the joint of the static sealing ring cover and the movable sealing ring cover, the sealing assembly comprises a static sealing ring fixed to the static sealing ring cover and a movable sealing ring fixed to the movable sealing ring cover, and the static sealing ring and the movable sealing ring abut against each other and are in interference contact to achieve dynamic sealing. The sealing device has the beneficial effects that dynamic sealing is achieved through interference contact of the static sealing ring and the movable sealing ring, the airtight reliability in the rotating state is effectively improved, and unstable tire pressure caused by gas leakage is prevented.

The invention discloses a tire detection method and system, an electronic device and a storage medium. The tire detection method comprises the following steps: collecting measurement data of a tire pressure sensor; identifying a vehicle state using the measured data; adjusting the acquisition frequency of a tire pressure sensor and an awakening mechanism of a microcontroller according to the vehicle state; acquiring tire pressure data by using a tire pressure sensor under the acquisition frequency; and under the awakening mechanism, awakening the microcontroller, and sending the tire pressure data to a receiving end according to a preset sending frequency corresponding to the vehicle state by utilizing the microcontroller. According to the technical scheme, the technical problem that in the prior art, a tire pressure sensor depends on periodic sampling and fixed-frequency communication, and consequently a large amount of invalid power consumption is generated can be solved.

The invention discloses a vehicle tire pressure monitoring reminding method and related equipment, and relates to the field of vehicle early warning, the method comprises the following steps: when a tire pressure sensor detects that a tire pressure change value of a target vehicle is greater than a tire pressure change threshold value, the tire pressure sensor sends a tire pressure sensor signal containing a preset wake-up identifier to tire pressure receiving equipment; the tire pressure receiving equipment verifies the sensor identifier to generate a verification result; the tire pressure processing equipment analyzes the tire pressure data of the target vehicle at the current moment, and when the current tire pressure state is an abnormal state, the tire pressure processing equipment marks a tire pressure sensor signal as an abnormal state signal and sends the abnormal state signal to the vehicle-mounted communication equipment; the vehicle-mounted communication equipment sends an abnormal state signal to the cloud platform; and based on the abnormal state signal and the current state parameter of the target vehicle, the cloud platform generates target alarm information and sends the target alarm information to the mobile terminal.

Systems and methods of controlling an air compressor are provided. A system of a vehicle can establish a bi-directional connection with a controller of an air compressor of the vehicle. The system can present, via a graphical user interface displayed on a display device, an icon for a preset configured with a target pressure for a type of object. The system can transmit, via the bi-directional connection responsive to a selection of the preset, an instruction to the controller to activate the air compressor to inflate the object to the target pressure.

The invention discloses a waste water and waste heat utilization management system for a hydrogen fuel cell hybrid power logistics truck. The waste water and waste heat utilization management system comprises a motor and transmission module, a storage battery module, a heat dissipation module, a fuel cell module, a power electronic module, a sensor module, a data analysis module and a heat dissipation control module. In special extremely cold weather, waste water and waste heat are recycled and utilized to heat the battery, the battery performance is optimized, meanwhile, the battery reaction can be promoted, and the battery efficiency is improved; when a truck is in a daily driving state and is braked, waste water generated by operation of a hydrogen fuel cell is fully utilized, and after cleaning treatment, spraying cooling is carried out on areas around tires and hubs, so that driving safety is ensured, and the service life of the tires is prolonged; in addition, the system is further integrated with an intelligent early warning and fault diagnosis system based on waste heat, heat changes of key components are monitored in real time, and rapid diagnosis and processing of faults are achieved.

The present invention is provided with a time-sequential load data acquisition unit that acquires data on a load of a predetermined loaded item in a time-sequential manner regarding a loading vehicle capable of loading the predetermined loaded item; a unit period setting unit that sets predetermined unit periods of which it is possible to change lengths according to a change in the load; a data division unit that divides time-sequential load data on the load of the loaded item by separating the time-sequential load data according to the unit periods; a representative value calculation unit that calculates respective representative values for each piece of divided data of the time-sequential load data divided by the data division unit; and a tire temperature prediction unit that predicts a temperature of tires mounted on the loading vehicle, at a specific time point, based on the respective representative values.

The invention belongs to the technical field of automobile electronics, and particularly relates to a tire pressure monitoring dynamic calibration method and system fused with vehicle speed data, and the method comprises the steps: obtaining real-time tire pressure, tire temperature, vehicle speed and environment temperature; based on the vehicle speed, the environment temperature and the calibration parameters, the tire theoretical temperature is estimated through a dynamic thermodynamic model; the real-time tire temperature and the theoretical temperature are fused through Kalman filtering, and the corrected internal temperature is obtained; and according to the real-time tire pressure, the corrected internal temperature and the cold tire reference temperature, a cold tire pressure equivalent value is calculated to judge the tire pressure state. By the adoption of the technical scheme, the interpretation ambiguity of traditional tire pressure monitoring can be overcome, the cold tire pressure equivalent value with more guiding significance is provided, and the accuracy, robustness and self-adaptive learning capacity of the system are enhanced.

Sensor modules mountable on a wheel are described with methods of use. A sensor module for a wheel includes a base module mountable to a rim. The sensor module further includes a first set of piezoelectric sensors coupled to the base module at a first side and a second set of piezoelectric sensors coupled to the base module at a second side. A method includes receiving a first force from a tire on a piezoelectric sensor mounted on a rim, the force resulting from an inflation of the tire and causing a first strain on the sensor. The method further includes receiving a second force on the sensor corresponding to a deformation of the tire due to surface contact, where the second force causes a second strain. The method also includes generating wheel data from electrical signals produced by the sensor; and transmitting the wheel data to a remote device.

A hydroplaning detection system includes a processor in communication with a communication system and a warning module in communication with the processor. The warning module receives data from vehicle-based sensors and generates an expected slip, a grip utilization, a drag force, and a calculated slip. The warning module receives data from a tire sensor unit and determines a confidence level by comparing the generated drag force to an expected drag. The warning module includes a hydroplaning detection logic that receives the expected slip, the grip utilization, the drag force, the calculated slip, and the confidence level and generates a hydroplaning detection warning and a warning confidence level. The warning module communicates the warning and the warning confidence level to at least one of a vehicle control system and an operator of the vehicle for action by the vehicle control system or the vehicle operator.

This disclosure describes systems and methods for determining tire inflation pressure loss. An example method may include receiving first tire pressure data for a first tire of a vehicle at a first time. The example method may also include receiving second tire pressure data for the first tire at a second time. The example method may also include identifying a slow leak in the first tire based on a relationship between the first tire pressure data and the second tire pressure data. The example method may also include causing to send an alert to a user.

A control method for radio frequency broadcast signals. The method comprises: acquiring tire pressure information and the wheel speed of a vehicle (1) (S100); on the basis of the tire pressure information and the wheel speed, determining the operational status of tire pressure measurement devices (11, 12, 13, 14) (S200); and on the basis of the operational status of the tire pressure measurement devices (11, 12, 13, 14), enabling or disabling the transmission of radio frequency broadcast signals. In the method, a radio frequency broadcast function is intelligently enabled or disabled on the basis of the operational status of tire pressure measurement devices (11, 12, 13, 14), thereby ensuring the reliability, efficiency and safety of a system and also reducing the unnecessary energy consumption of the devices in each operating stage, and thus prolonging the service life of the devices; and a whitelist mechanism is combined with an identity authentication process within a limited time period to provide a safer and more efficient authentication method for the tire pressure measurement devices (11, 12, 13, 14), thereby preventing access by unauthorized devices, and also enhancing the user convenience for authenticated devices by means of a simplified reconnection process. Further disclosed are a control apparatus for radio frequency broadcast signals, and a tire pressure monitoring system.

In the determination of location of tire-mounted sensors, for a tire position of a plurality of tire positions, a tested pressure reading of a tire at the tire position is determined via a pressure sensor, other than the tire-mounted sensor of the tire, operatively connected to the tire. The tested pressure reading is then compared with an associated past pressure reading provided by a tire-mounted sensor most recently associated with the tire position. When the tested pressure reading does not compare favorably with the associated past pressure reading, the tested pressure reading is compared with non-associated past pressure readings provided by tire-mounted sensors that were not most recently associated with the tire position. When the tested pressure reading compares favorably with a particular non-associated past pressure reading corresponding to a particular tire-mounted sensor, the sensor identification of the particular tire-mounted sensor is associated with the tire position.

The invention discloses a tire pressure alarm method, a vehicle and a storage medium, and belongs to the technical field of vehicle electronic control. According to the scheme, firstly, the current capacitance change value of a vehicle kick sensor is detected, and the current capacitance change value can sensitively reflect the change of the distance between a vehicle and the ground; then, according to the current state of the vehicle, a corresponding target reference capacitance change value is matched, and the reference capacitance change value represents a capacitance change reference caused by passenger load and suspension height change under the standard tire pressure; and finally, the tire pressure alarm is triggered by judging whether the deviation between the current capacitance change value and the target reference capacitance change value exceeds a preset threshold value or not. According to the scheme, tire pressure monitoring is achieved by reusing the existing kicking sensor, and tire pressure early warning is achieved on the basis that additional hardware does not need to be introduced.

The invention provides a tire pressure adjusting method, a readable storage medium and a vehicle, and is applied to the technical field of tire pressure control. The method comprises the steps that in the vehicle driving process, before a current vehicle drives into a target road section in front, the target tire pressure of the current vehicle driving on the target road section is determined, the target performance parameter of the current vehicle driving on the target road section at the target tire pressure is predicted, and under the condition that the target performance parameter reaches the standard, the target tire pressure of the current vehicle is determined; and adjusting the tire pressure of the current vehicle to the target tire pressure. According to the method provided by the invention, the tire pressure of the vehicle can be adjusted to the target tire pressure with relatively high reliability before the vehicle is driven into the target road section in front of the vehicle, so that the vehicle has relatively high performance after being driven into the target road section.

A method for deactivating a remote automatic parking mode of a vehicle in a parking garage. The vehicle being equipped with a tire monitoring system, including wheel units mounted in each wheel of the vehicle and each being provided with an accelerometer measuring a radial component of an acceleration of the wheel and being dependent on a terrestrial gravitational field. The vehicle being provided with an automatic parking mode remotely controlled by portable equipment carried by a user. The method includes, if the conditions for activating the measurements of the wheel units are verified: each wheel unit measuring acceleration values over time; comparing said values with a threshold value, for each wheel unit; if the acceleration values of at least two wheel units exceed said threshold value, then: detecting any movement of said vehicle in a parking garage; and deactivating the remote automatic parking mode.

A tire inflation assembly includes a housing that includes a fluid supply port and at least partially defining a fluid chamber in fluid communication with the fluid supply port. The tire inflation assembly further includes a first valve subassembly operatively connected to the housing and in fluid communication with the fluid chamber, wherein the first valve subassembly is configured to be operatively connected to and in fluid communication with a first tire. The first valve subassembly includes a first fluid valve and a second fluid valve each disposed between and in fluid communication with the fluid chamber and with the first tire. The first fluid valve is configured to open responsive to a pressure differential between the fluid chamber and the first tire, and the second fluid valve is configured to open responsive to pressure in the fluid chamber being greater than a first pressure threshold.

A multi-tire inflation / deflation system. The multi-tire inflation / deflation system includes an air compressor, the air compressor configured to take in ambient air and discharge compressed air at a pressure higher than ambient pressure and a power input for the air compressor, where the power input is configured to provided electrical power to the air compressor. The multi-tire inflation / deflation system also includes a control, where the control allows the user to select a desired pressure and an output hose, where the compressed air is output from the air compressor. The multi-tire inflation / deflation system further includes a connector, where the connector allows the output to be connected to an external device and a slide valve, where the slide valve is configured to allow a user to turn off or on the air flow as desired.

An auto-location system locates a position of a tire that supports a vehicle. The system includes a sensor unit that is mounted on the tire and includes a footprint length measurement sensor to measure a length of a footprint of the tire. A processor is in electronic communication with the sensor unit and receives the measured footprint length. A driving event classifier is executed on the processor and employs the measured footprint length to determine the position of the tire on the vehicle. An auto-location output block is executed on the processor and receives the determined position of the tire on the vehicle and generates a message correlating the sensor unit to the position of the tire on the vehicle.

A double-use nozzle adapter includes a main body, a switch unit, and a needle unit. The switch unit includes a shifting member and a rigid retaining member. The rigid retaining member is arranged between the shifting member and the main body. The shifting member shifts the rigid retaining member between a first position and a second position. The needle unit is slidably installed in the main body and includes a needle. In the first position, the shifting member drives the rigid retaining member to press against the needle, thereby preventing the needle from moving with respect to the main body and making the needle connectable to a Schrader valve. In the second position, the rigid retaining member moves between the shifting member and the main body, so as to allow the needle to move with respect to the main body and make the needle connectable to a Presta valve.

The utility model provides an unmanned logistics vehicle chassis and an unmanned logistics vehicle. The unmanned logistics vehicle chassis comprises a vehicle frame assembly, a front suspension assembly and a rear suspension assembly, wherein the front suspension assembly and the rear suspension assembly are arranged on the vehicle frame assembly; the upper surface of the frame assembly is used for mounting a container; the front suspension assembly comprises a transversely-arranged plate spring arranged in the width direction of the frame, the two ends of the transversely-arranged plate spring are connected with the knuckle assemblies respectively, and the middle of the transversely-arranged plate spring is connected with the frame assembly. The rear suspension assembly comprises plate spring suspension assemblies arranged left and right at intervals, each plate spring suspension assembly comprises a plate spring set formed by stacking a plurality of plate springs, the two ends of each plate spring set are connected to the frame assembly, and the middle of each plate spring set is connected to the rear axle assembly. According to the chassis of the unmanned logistics vehicle, the front suspension assembly with the transverse plate spring structure and the rear suspension assembly with the plate spring suspension assembly structure are adopted, so that the chassis is high in bearing capacity, low in manufacturing cost and good in using effect.

Disclosed are various embodiments for integrating one or more sensing device(s) into a tire during a tire manufacturing process. In one example, the sensor device includes an electronic device (e.g., a sensing and / or energy harvesting device), a communication device, or any combination thereof. The sensing and / or energy harvesting device is positioned between a chafer and a ply of a tire, at an axially outward side of the ply, wherein the chafer is configured to form a seal with a rim flange of a wheel. The communication device is positioned between a liner and the ply at an axially inward side of the ply. In some examples, a connector is connected between the sensing and / or energy harvesting device and the communication device.

A method for measuring impact signals over a plurality of revolutions of a tire that rolls on a road surface is provided, the impact signals being induced in acceleration data measured by an acceleration sensor mounted in the tire at a contact patch coming into contact with the road surface with each revolution of the tire. The method comprises acquiring the acceleration data over a plurality of revolutions of the tire and processing the acceleration data at the sensor. Processing the acceleration data at the sensor comprises processing the acceleration data to measure acceleration values for each impact signal and calculate an impact peak acceleration value (a_min); calculating a running average of the impact peak acceleration value (a_min) over the plurality of revolutions of the tire; measuring a start time and an end time of each impact signal by comparing acceleration values of the acceleration data to a first or second dynamic threshold, wherein the dynamic threshold is adjusted dependent on the running average of the impact peak acceleration value (a_min); and generating, from the measured start time and end time of each impact signal, a time-related parameter chosen from one or more of: a duration of an impact signal (t_patch), a time period between two consecutive impact signals (t_rev), and a ratio between the duration (t_patch) and the time period (t_rev). The method further comprises transmitting the time-related parameter to an external server.

Provided is a method, etc., for estimating uneven tire wear. This tire state estimation method involves: obtaining an image which includes both ends of the tread of a target tire, and captures said tread from the front in a manner such that said tread is continuous in a prescribed direction; inputting the obtained image into a trained first machine learning model; and deriving an output from the trained first machine learning model. Therein, the output of the trained first machine learning model corresponds to the estimation results for the uneven wear of the target tire.

An embodiment of the present invention comprises: a first step of filtering data collected by a data collection unit and tracking an effective rolling radius (ERR) in an operation unit that performs an operation; a second step of correcting the effective rolling radius on the basis of the contact ratio in the calculation unit; a third step in which the calculation unit confirms whether the effective rolling radius increases; a fourth step in which the calculation unit generates a wear rate during the period in which the effective rolling radius increases by using a graph; a fifth step in which the calculation unit outputs wear when the effective rolling radius increases; a sixth step in which the calculation unit corrects the effective rolling radius on the basis of the contact ratio when the effective rolling radius decreases; a seventh step in which the calculation unit estimates the wear of the tire using the linear relationship between the effective rolling radius and the amount of wear of the tire in the portion where the effective rolling radius is reduced; and an eighth step in which the calculation unit outputs wear when the effective rolling radius is reduced.