Disclosure of Invention
The invention aims to solve the technical problem of providing an intelligent monitoring system for an automobile tire, which can intelligently monitor the performance state of the tire.
In order to solve the above technical problem, the present invention provides an intelligent monitoring system for an automobile tire, comprising:
the stress sensors and the strain sensors are arranged in the rubber body of the automobile tire and are respectively used for acquiring pressure and deformation data of the tire;
the wireless transmitting device is electrically connected with the stress sensor and the strain sensor and is used for transmitting data collected by the stress sensor and the strain sensor;
the intelligent tire performance monitoring system comprises a wireless receiving device and an intelligent system, wherein the wireless receiving device is integrated in an automobile running computer and used for receiving data, collected by the stress sensor and the strain sensor, sent by the wireless transmitting device, and the intelligent system is used for judging tire performance change according to the data collected by the stress sensor and the strain sensor.
Furthermore, the intelligent monitoring system for the automobile tire further comprises a display, wherein the display is electrically connected with the intelligent system and is used for displaying a stress cloud picture or a strain cloud picture of the tire.
Further, the intelligent system is also used for calculating the current tire thickness according to the data collected by the stress sensor and the strain sensor in the following mode:
F=a×ε·z+c
wherein epsilon represents the deformation of the tire and is the ratio of the strain quantity of the width of the tire to the original width; z represents the tire thickness; f represents the stress of the tire; a is a coefficient; c is a time dependent function.
Further, the intelligent system determines that the tire reaches the ultimate strength and warns when the calculated current tire thickness is less than a predetermined threshold.
Further, the intelligent system is also used for calculating the thickness of the tire according to the tire deformation data, obtaining the relation between the tire deformation and the time according to the tire deformation data at each moment, and judging the tire wear condition according to the relation.
The intelligent monitoring system has the advantages that the using state of the tire is intelligently monitored, the tire is prevented from being repaired after being damaged, the service life of the tire is prolonged, and meanwhile, the vehicle can run more safely.
Detailed Description
The following description of the embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the invention may be practiced.
Referring to fig. 1, an embodiment of the present invention provides an intelligent monitoring system for an automobile tire, including:
the stress sensors and the strain sensors are arranged in the rubber body of the automobile tire and are respectively used for acquiring pressure and deformation data of the tire;
the wireless transmitting device is electrically connected with the stress sensor and the strain sensor and is used for transmitting data collected by the stress sensor and the strain sensor;
the intelligent tire performance monitoring system comprises a wireless receiving device and an intelligent system, wherein the wireless receiving device is integrated in an automobile running computer and used for receiving data, collected by the stress sensor and the strain sensor, sent by the wireless transmitting device, and the intelligent system is used for judging tire performance change according to the data collected by the stress sensor and the strain sensor.
Specifically, in this embodiment, the stress sensors and the strain sensors are distributed in the tire rubber body and are respectively connected to the wireless signal transmitting device, and data measured by the stress sensors and the strain sensors are transmitted to the wireless receiving device through the wireless signal transmitting device and then transmitted to the intelligent system. The power supply of the stress and strain sensor and the wireless signal transceiver adopts a composite power supply, namely, a storage battery and an intelligent power generation device provide a long-term stable power supply.
Assuming that the tire material is uniform and the mechanical properties are the same (the tires produced by different types of tires by different manufacturers are different, and the embodiment does not perform specific analysis), the tire is subjected to the same force, the deformation is related to the tire strength, and the higher the tire strength is, the smaller the deformation is. When the materials are the same, the tire strength is related to the tire thickness (tire wall thickness in this embodiment), i.e. (1) the tire is subjected to the same magnitude of force F, the thicker the tire thickness z, the smaller the tire deformation epsilon; (2) the greater the thickness z of the tire, the limit of the force F it can withstand when the tire deformation ε is the samemaxThe larger. The expression is as follows: f ═ a × epsilon · z + c, where epsilon represents tire deformation and is the ratio of the amount of strain in the tire width (Δ L) to the original width (L), i.e., ∈ ═ Δ L/L, dimensionless; z represents the tire thickness; f represents the stress of the tire; a is a coefficient; c is a time-dependent number, and the value of c gradually decreases as time increases, and if the influence of time is not considered, c is 0.
The intelligent system receives the stress and the tire pressure and deformation data acquired by the strain sensor through the wireless receiving device and processes the data, and the pressure cloud picture and the strain cloud picture are visually displayed through the display, as shown in fig. 2. The intelligent system can analyze the tire performance change condition by comparing with the historical data of the initial state.
For example, assuming that a tire thickness z is 100 units, a force F of 100 units under normal conditions produces a deformation of 50 units, and a force F of 100 units under extreme conditions produces a deformation of 100 units, when the extreme strength of the tire material is reached, the intelligent system warns.
Application scenario 1: the tire wear was analyzed. When the tire thickness z changes, the pressure and strain change accordingly. When the tire becomes thinner due to wear, the tire deformation epsilon increases and the tire internal pressure will change, as compared with the tire in the initial state (new tire); and comparing the stress and the strain of different positions in the same state, so that the wear degrees of different positions can be judged. When the tire thickness z is reduced to 50% of the initial state, 100 units of deformation epsilon normally occurs under the force F of 100 units, and at the moment, the intelligent system judges that the tire reaches the ultimate strength and is in danger, and then a warning is given.
Application scenario 2: and monitoring the tire pressure of the tire. When the tire pressure is too large or too small, the safety of the tire and the vehicle is affected, and the deformation of the tire and the change of the rubber body pressure of the tire are reflected. Generally, when the tire pressure is large, the tire has large expansion volume, uniform deformation and small and concentrated ground contact area; when the tire pressure is small, the tire has small expansion volume, uneven deformation and large and diffused contact area.
Application scenario 3: and analyzing the damage cause of the tire. When the force F is unchanged, the intelligent system can calculate the thickness z of the tire by monitoring the deformation epsilon of the tire, obtain the relation between the deformation epsilon of the tire and time through epsilon data at each moment, and judge the wear condition of the tire according to the relation. Tire wear conditions are mainly classified into a long-term wear type and a short-term cut type, and a tire strain of the long-term wear type is uniform over a long period of time, while a tire strain of the short-term cut type is severe over a short period of time.
Application scenario 4: and analyzing the road condition. The road surface on which the vehicle travels can be roughly divided into three conditions of a highway, a mountain road and a sand road. The road is flat and hard, and the stress and strain at the similar position of the tire are similar along with the change of time; the mountain road is rugged and uneven, and has a lot of stones, and the stress on each position of the tire is inconsistent, so the stress and the strain change irregularly along with time; the stress condition of the tire in the silt road surface is similar to that of a road, but because the contact area of the tire and the road surface is large, the deformation range of the tire is large, meanwhile, the tire in the silt road has a slipping phenomenon, and the difference can be found by comparing the rotating speed of the tire with the actual speed.
Application scenario 5: tire maintenance and replacement analysis. Judging whether the wall thickness of the tire is in a safe range by monitoring the stress and the strain of the tire, and giving a suggestion of whether to replace the tire; providing a suggestion to maintain the tire by analyzing the tire pressure and the tire wear degree of the tire; according to the analysis of road conditions and the analysis of wear reasons, the installation of the adaptive special type of tires is recommended.
The intelligent monitoring system has the advantages that the using state of the tire is intelligently monitored, the tire is prevented from being repaired after being damaged, the service life of the tire is prolonged, and meanwhile, the vehicle can run more safely.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.