CN113858893A - Monitoring device and method for extremely advanced early warning of tire burst risk - Google Patents
Monitoring device and method for extremely advanced early warning of tire burst risk Download PDFInfo
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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
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Abstract
The invention discloses a monitoring device and a method for extremely early warning of tire burst danger. The invention comprises the following steps: various sensors are arranged near the position of a hub bearing, and tire noise signals such as vibration signals, audio signals and the like of the healthy tire under the condition of normal running state are continuously captured in real time; when the tire is rolled with foreign matters such as steel nails, stone particles and the like, the tire noise signal is changed, and the signal sent by the contact of the foreign matters is completely merged into the tire noise signal; based on the difference of tire noise signals before and after foreign matters are rolled on the tire, the signals are continuously analyzed in real time by matching with a speedometer, the position, the angle and the type characteristics of the foreign matters are obtained, and then the foreign matters are timely fed back to drivers and passengers, so that the tire condition is extremely early warned, and the tire is prevented from being damaged and developing into the tire burst danger. The invention has the characteristics of simple structure, easy maintenance, high sensitivity, high timeliness, high accuracy and the like, and is beneficial to training drivers and passengers to form good vehicle using habits of checking the working condition of the tire in time and cleaning foreign matters in the tire in time.
Description
Technical Field
The invention is applied to the field of vehicle tire burst prevention, carries out advanced monitoring and early warning on the tire burst danger, and ensures the life and property safety of drivers and passengers to a great extent.
Background
When a car runs on a foreign-object-free road surface, the tires press on the road surface to generate stable noise, which is called background tire noise. Different background tire noises may be generated on different road surfaces. When foreign matters such as screws, metal pieces, broken stone particles and the like appear on the road surface and are rolled by the tire, the foreign matters continuously impact the ground along with the rotation of the tire, and impact sounds of 'Da, …' are generated. Once a tire is punctured by a foreign object, there is a risk of tire puncture, especially at higher vehicle speeds. Aiming at the tire burst risk, some automobiles are additionally provided with anti-burst monitoring equipment, so that the damage caused by the tire burst of the automobile is reduced to a certain extent. The most commonly used monitoring instrument is a tire pressure detection system, in which when the air pressure of a tire changes, a tire pressure monitoring sensor senses the change of the air pressure in the tire and feeds back information to an acquisition host, the acquisition host displays the abnormal change of a tire pressure value after receiving the change information of the tire pressure, and a driver can automatically determine whether to take some tire burst prevention measures according to the abnormal tire pressure change value.
Qualitatively speaking, the tire pressure detection system belongs to a passive explosion-proof tire monitoring and early warning system. A large amount of investigation finds that the tire pressure detection system has a plurality of defects in actual use, abnormal error alarm occurs under the condition of normal working conditions, and weak tire pressure change induction is not sensitive enough, and the tire pressure detection system is late in learning, does not give early warning, is slow in early warning intervention and the like under the condition of abnormal working conditions. When foreign matters are rolled on the tire but the tire is not punctured, the early warning tire pressure detection system before the state can not be realized; when the tire is punctured, but no air leakage exists, and the tire pressure is not changed, the tire pressure detection system cannot realize early warning in such a state; when the tire is punctured and leaks to a certain degree, but the weak change of the tire pressure does not reach the sensing sensitivity of the air pressure sensor, the tire pressure detection system still cannot give an early warning of tire burst; the sensor can sense the tire pressure only when the tire is punctured and the change of the air pressure reaches the sensitive value of the air pressure sensor, and the tire pressure detection system can send out early warning information when the tire pressure is reduced to a set air pressure threshold value. However, in some cases, when the tire pressure detection system monitors the change of the air pressure and sends an alarm, but the driver does not take timely measures, the risk of tire burst of the vehicle also occurs. When the air pressure of the tires changes, the contact area between the tires and the ground is changed due to the air pressure difference, the rotating speed of four wheels is unbalanced with the friction force, the stress of a vehicle chassis is uneven, and the danger of tire burst is caused, which is very common under the condition of high-speed running.
Five general stages of tire puncture of a vehicle tire are illustrated in fig. 2. The hysteresis of the tire pressure detection system determines that the system based on the air pressure change principle cannot achieve the favorable effects of advanced early warning and quick response to the risk of tire burst to a certain extent, so that the life safety of drivers is threatened, and serious potential safety hazards exist. Therefore, a new technology is urgently needed to realize the advanced monitoring and early warning of the vehicle tire burst phenomenon, so that the defects of a tire pressure detection system are overcome.
As described above, the tire with the foreign object thereon makes an abnormal sound when it comes into contact with the ground, and the abnormal sound can be sensed by the audio sensor. According to the amplitude and the energy of the audio signals received by the plurality of audio sensors at the same time, the tire where the foreign matter is located can be determined very accurately. Knowing the existence of the foreign matters and the tire where the foreign matters are located, the vehicle owner can very conveniently search the foreign matters on the tire surface, so that the foreign matters are cleaned in time, and the air leakage and tire burst risks caused by the fact that the tire is punctured are avoided. Meanwhile, the tire rolled with the foreign matter also generates vibration waves when contacting the ground, certain difference exists between the vibration waves without the foreign matter and the vibration waves with the foreign matter, the vibration waves have great difference in multiple aspects such as signal fluctuation peak value, energy value, frequency spectrum and the like, and the key problems such as the existence of the foreign matter, the tire where the foreign matter is located and the like can be very accurately judged through the contrast analysis of the difference of the vibration waves.
The invention can realize the advanced monitoring and early warning of the tire burst phenomenon, and the key is that the relied technical support is not based on the information acquired by the air pressure sensor, but is based on the information acquired by the sensors such as the vibration sensor, the audio sensor, the velocimeter and the like for analysis.
Disclosure of Invention
The invention provides a very advanced monitoring and early warning system and a method for preventing tire burst, which aims to carry out very advanced monitoring and early warning on the tire burst danger of a vehicle in a running state, thereby greatly ensuring the life and property safety of drivers and passengers. In order to achieve the purpose, each tire corresponds to a vibration sensor, an audio sensor and a tachometer, tire noise signals such as vibration signals, audio signals and the like of a healthy tire under the condition of normal running state, which are captured by three types of sensors arranged near a hub bearing in real time and continuously are used as analysis backgrounds, and when the tire is rolled with foreign matters such as steel nails, iron sheets, stone particles and the like, the tire noise signals can be changed along with the vibration signals, and the signals sent by the contact of the foreign matters are completely integrated into the tire noise signals; based on the difference of tire noise signals before and after foreign matters are rolled on the tire, real-time rotating speed information monitored by a speedometer is matched, the tire noise signals are analyzed continuously in real time, foreign matter signal characteristics are obtained, attributes such as positions, angles and types of the tire attached foreign matters are accurately analyzed and calculated, and then drivers and passengers are timely reminded to clear the tire attached foreign matters, so that the tire is damaged by the foreign matters such as steel nails, iron sheets and stone particles, the condition of early warning of the tire can be realized before air leakage is caused, and the tire is prevented from being damaged and developing into a tire burst danger.
The above description is only a preferred design of the present invention, and several modifications or substitutions may be made without departing from the technical principle of the present invention. Several improvements or alternatives include: the sensor is used alone or matched with other sensors; the signal acquisition and cache module and the signal processing and early warning module are integrated into a module with both functions; the working principle is the same as or similar to the technical realization method. Several modifications or substitutions include, but are not limited to, the above-described modifications or substitutions.
Drawings
FIG. 1 is a simplified schematic installation diagram of a monitoring device and method for ultra-advanced early warning of tire puncture risk;
FIG. 2 illustrates five conventional stages of a vehicle tire undergoing a flat tire;
FIG. 3 is a schematic diagram of a system architecture of a monitoring device and method for advanced early warning of tire burst risk (mode 1);
FIG. 4 is a schematic diagram of a system architecture of a monitoring device and method for advanced early warning of tire burst risk (mode 2);
the system comprises a sensor group 1, a signal acquisition and cache module 2, a signal processing and early warning module 3, a foreign matter attachment module 4 and a tire 5.
Detailed Description
The invention is further described below with reference to the accompanying drawings: when a vehicle runs on a road surface, if foreign matters 4 such as screws, metal pieces, and crushed stone particles appear on the road surface and are rolled by the tire 5, the foreign matters 4 continuously hit the ground along with the rotation of the tire 5, and the hitting sounds of "Da, …" are generated. The sensor group 1 arranged near the position of the hub bearing can continuously capture information such as vibration signals, audio signals and the like of the tire 5 under the condition of running in real time, and the signal acquisition and cache module 2 captures the tire noise signals sensed by the sensor group 1 and transmits the tire noise signals to the signal processing and early warning module 3; the signal processing and early warning module 3 applies a frequency spectrum analysis method, a ringing analysis method, an SVT analysis method and an equivalent comparison analysis method to the acquired signals to process the information in real time, displays the processing result in real time, and carries out real-time early warning on the running condition which is consistent with the abnormal characteristics and the abnormal working condition criterion. And then remind driver and crew to clear up the tire adhesion foreign matter in time for foreign matters such as steel nail, iron sheet, stone grain just can realize the extremely advanced early warning tire operating mode before damage tire, cause the gas leakage, avoid the tire impaired development to become the danger of blowing out.
Fig. 3 and 4 are two system architecture modes of a monitoring device and a monitoring method for extremely advanced early warning of tire burst risks. The first system architecture is a conventional universal mode of the invention, is suitable for four-wheel vehicles and almost meets the use requirements of all four-wheel vehicles. Each set of system comprises 4 vibration sensors, 4 audio sensors and 4 velocimeters, and the total number of the channels is 12; 1 vibrations sensor, 1 audio sensor, 1 tachometer constitute 1 and organize, pair the use, correspond to 1 tire. Each set of systems is default approved for installation of 4 tires. The second system architecture is a non-universal mode of the invention, is suitable for single-wheel or multi-wheel vehicles, and has variable interfaces of 1, 2, 3, 4, 6, 8 and …. 1 vibrations sensor, 1 audio sensor, 1 tachometer constitute 1 and organize, pair the use, correspond to 1 tire of vehicle. According to the actual number of tires of the vehicle, the tires are freely matched for use, and a plurality of groups of tires are installed when explosion-proof real-time early warning monitoring is needed to be carried out on the tires. In the two modes, the two modules of the signal acquisition and cache module and the signal processing and early warning module can exist independently and can be fused into a module with both functions.
The analysis method adopted for the acquired contact signal of the tire 5 containing the foreign matter 4 is as follows:
the first analysis method comprises the following steps: ringing analysis method. After the foreign matter is rolled on the tire, the foreign matter continuously collides with the ground along with the rotation of the tire, and an audio signal and a vibration signal are generated, just like a dotting counter. The circumference of one tire rotation is the product of the time difference of two continuous impacts of the same foreign matter on the ground under the condition of tire rotation and the average linear speed measured by the tachometer within two dotting moments. If the calculated circumference of the tire is equal to the actual circumference of the tire, then it is highly certain that the dotting foreign object is in a fixed location on the tire. The more ringing that occurs during any one tire revolution indicates the more foreign matter is stuck on the tire. The ring numbers in a plurality of continuous tire circumferences are compared to determine the number and the position of foreign matters on the tire.
The second analysis method comprises the following steps: SVT assay. The method comprises the steps of recording counting time T1 and T2 of two continuous times of a foreign matter impacting the ground by a vibration sensor and an audio sensor (the two can be used simultaneously or singly), calculating a time difference dt (T2-T1) of two continuous ringing, recording an average linear velocity dv from T1 to T2 in real time by a tachometer, measuring the circumference length L of a tire, calculating ds and L by dt and dv according to an S (VT) formula, comparing the ds and the L, calculating V and dv by L and dt, comparing the T and dt, and comprehensively and accurately determining the position of the tire where the foreign matter is located and the quantity of the foreign matter by three comparison methods.
The third analysis method: equivalent weight comparison analysis. Equally dividing the tire into N parts from the center point according to the angle, determining N according to the convenience degree of hub installation, wherein the larger N is, the smaller the unit angle is, and the better the monitoring effect is. Each of the equal portions has a specific sampling duration dT and angular speed dV while the tyre is rotating, and after one tyre revolution there is: VT-dV 1dT 1-dV 2dT 2-dV 3dT 3- … -dVNdTN. Where V and T are preset reference values. And converting the number of data signal points in the 1/N grid into a new number of data points according to the ratio of VT to VNTN, and forming new data of one tire revolution. In so doing, the total number of data points per tire revolution remains the same throughout. The data points of each circle of the tire are displayed side by side, so that the existence of the foreign matters can be determined as long as the abnormal change in the signals always appears and appears at the same equivalent time, and the position angle and the quantity of the foreign matters can be determined very accurately.
The fourth analysis method: and (3) spectrum analysis. And carrying out short-time Fourier transform on the collected continuous vibration signals and the collected audio signals, and observing the real-time change condition of the signal frequency spectrum. If the spectrogram has not changed basically, it indicates that the tyre is safe; if a stable, continuous pattern of anomalies is present and there is a positive correlation change with the speed change of the tire, it is an indication that a foreign object has been rolled on the tire. And resolving the attributes such as the quantity, the position, the type and the like of the foreign matters according to the frequency spectrum.
Claims (6)
1. A monitoring device and method for extremely advanced early warning of tire burst danger is characterized by mainly comprising three core hardware modules and four types of signal analysis algorithms, wherein the three core hardware modules comprise a sensor module, a signal acquisition and cache module and a signal processing and early warning module; the sensor module comprises a vibration sensor, a microphone audio sensor and a speedometer, which are respectively arranged on the fixed point position of the automobile chassis, which is closest to the tire bearing, is most easy to install, does not wind wires and does not influence the normal work of other parts; the signal acquisition and cache module is arranged in a vacant position which is convenient to place in a vehicle cab; the signal processing and early warning module has the function of displaying signal graphs in real time and is also arranged in a vacant position which is convenient to place in a vehicle cab; the sensor module continuously senses vibration signals, audio signals and instantaneous rotating speed generated between the tire and a contact object in real time, and the signal acquisition and cache module captures the tire noise signals sensed by the sensor and transmits the tire noise signals to the signal processing and early warning module; the signal processing and early warning module processes the acquired signals in real time, displays the processing result in real time and carries out real-time early warning on the running condition which is consistent with the abnormal characteristic and the abnormal working condition criterion; the four types of signal analysis algorithms comprise a frequency spectrum analysis method, a ringing analysis method, an SVT analysis method and an equivalent weight comparison analysis method, and the algorithms are all integrated in an embedded software system of the signal processing and early warning module.
2. The monitoring device and the method for extremely advanced early warning of tire burst danger according to claim 1 are characterized in that the extremely advanced monitoring and early warning for realizing the tire burst phenomenon is realized based on three sensors, namely a vibration sensor, a microphone audio sensor and a velocimeter; the three sensors can be used simultaneously, or two of the three sensors can be used in combination, or can be used independently; the user can freely switch and select the type of the used sensor and the signal processing method according to the needs and the use preference, and the more analysis methods, the higher the reliability.
3. The device and the method for monitoring the tire burst risk of the ultra-advanced early warning tire according to claim 1 are characterized in that: the overall architecture of the system is divided into two modes, the first system architecture is a conventional general mode of the system, the system is suitable for four-wheel vehicles and almost meets the use requirements of all the four-wheel vehicles, each set of system comprises 4 vibration sensors, 4 audio sensors and 4 velocimeters, 12 channels are totally formed, 1 vibration sensor, 1 audio sensor and 1 velocimeter form 1 group which is used in a matched mode and corresponds to 1 tire, and each set of system can be defaultly used for installing 4 tires; the second system architecture is a non-universal mode of the invention, is suitable for single-wheel or multi-wheel vehicles, the number of interfaces is variable, 1, 2, 3, 4, 6, 8, …, 1 vibration sensor, 1 audio sensor and 1 velocimeter form 1 group, and the 1 group is used in a matched manner, corresponding to 1 tire of the vehicle, the 1 group is freely matched and used according to the actual number of the tires of the vehicle, and several groups are installed when the tires need to be subjected to tire explosion prevention real-time early warning monitoring; in the two modes, the two modules of the signal acquisition and cache module and the signal processing and early warning module can exist independently and can be fused into a module with both functions.
4. The monitoring device and method for the advanced early warning of tire burst danger according to claim 1, wherein the invention deeply analyzes the vibration signal and the audio signal by using a plurality of embedded signal processing algorithms such as spectrum analysis, ringing analysis, SVT analysis, equivalent weight comparison and the like to the information such as the vibration signal, the audio signal, the rotating speed and the like generated by the real-time, continuous and synchronous capture of the sensor of the automobile tire in the rotating state by adopting a plurality of embedded signal processing algorithms to obtain the related physical quantities such as the spectrum parameter, the ringing parameter, the speed parameter, the time difference parameter, the amplitude peak valley parameter and the like, so that the analyzed results of the plurality of signals are mutually compared and verified, and the high reliability of the advanced early warning of the explosion-proof tire is realized.
5. The device and the method for monitoring the tire burst risk of the ultra-advanced early warning tire according to claim 1 are characterized in that: defined in terms of tire specifications, the present invention is applicable to pneumatic tires of various specifications; defined in terms of driving conditions, the invention applies to tires in normal driving conditions and in contact with the ground, and not to tires in rest condition; the system is defined according to the hardness of the pavement, is widely suitable for hard and medium hard pavements such as concrete pavements, asphalt pavements and the like, and has low applicability to soft pavements such as dirt roads, stone roads and the like, namely, the harder the pavement is, the more applicable the system is; the invention is defined according to the mechanical property of the pavement, is widely applied to rigid pavements and semi-rigid pavements, and is applied to flexible pavements to a certain extent; the invention is widely applied to the working condition that a plurality of foreign matters are adhered on the tire according to the quantity of the adhered foreign matters on the tire.
6. The device and the method for monitoring the tire burst risk of the ultra-advanced early warning tire according to claim 1 are characterized in that: the early warning system can early warn the foreign matters on the tire in real time within a very short time when the tire is rolled with the foreign matters such as steel nails, iron sheets, stone particles and the like, does not need to respond until the air pressure changes after the tire is punctured by the foreign matters, has an early warning characteristic and high accuracy as the early warning effect is completely advanced to an explosion-proof system taking monitoring of the change of the tire pressure as a target; the tire burst early warning device not only can early warn tire burst, but also can analyze and evaluate foreign bodies attached to the tire, evaluate the quantity, the direction, the type and other attributes of the foreign bodies, facilitate drivers and passengers to clean the foreign bodies in time, prevent the potential tire burst danger caused by the existence of the foreign bodies but not knowing, ensure the safety of drivers, passengers, goods and materials, vehicles and the like in time, and reduce the accident rate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115519946A (en) * | 2022-10-25 | 2022-12-27 | 深圳曦华科技有限公司 | Tire pressure signal processing method, vehicle body area controller and related device |
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