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WO2021188019A1 - Procédé d'inspection de pneumatiques automobiles - Google Patents

Procédé d'inspection de pneumatiques automobiles Download PDF

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Publication number
WO2021188019A1
WO2021188019A1 PCT/RU2021/050072 RU2021050072W WO2021188019A1 WO 2021188019 A1 WO2021188019 A1 WO 2021188019A1 RU 2021050072 W RU2021050072 W RU 2021050072W WO 2021188019 A1 WO2021188019 A1 WO 2021188019A1
Authority
WO
WIPO (PCT)
Prior art keywords
tire
group
bus
signals
examined
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/RU2021/050072
Other languages
English (en)
Russian (ru)
Inventor
Ольга Олеговна ЧУБАРОВА
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Obschestvo S Ogranichennoy Otvetstvennost'yu "mosagroteh"
Original Assignee
Obschestvo S Ogranichennoy Otvetstvennost'yu "mosagroteh"
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from RU2020111304A external-priority patent/RU2781773C2/ru
Application filed by Obschestvo S Ogranichennoy Otvetstvennost'yu "mosagroteh" filed Critical Obschestvo S Ogranichennoy Otvetstvennost'yu "mosagroteh"
Publication of WO2021188019A1 publication Critical patent/WO2021188019A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
    • 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 invention relates to the tire industry, and in particular to methods for inspecting automobile tires, including large-size tires (KGSH) of machines used in mining and construction, before their restoration. It allows you to investigate the internal structure of car tires, detect hidden defects and determine their sizes, as well as compare the tested tires with reference samples. In addition, the proposed invention can be used in other areas, for example, in the study of the structure of composite materials.
  • KGSH large-size tires
  • the advantage of this invention is the location of the receiver of sound waves in close proximity to the tested tire, which increases the measurement accuracy and reduces the level of interference.
  • the presence of the basic parameters of tires for comparison allows one to determine the size of defects, which is important when making a decision on the advisability of restoring used tires.
  • the disadvantages of this invention can be attributed to the lack of accuracy in determining the location and size of the defect, and in addition, the complexity of rotation of the KGSH due to their weight and size.
  • the interpretation of the data obtained is also difficult, since a sound wave is captured, coming from a sufficiently large section of the investigated tire.
  • the advantage of this invention is the efficiency of monitoring the state of the investigated tire.
  • the disadvantages of this invention include the impossibility of constructing a model of the investigated tire as a whole and the determination of wear by comparing the data obtained with a reference sample. This makes it difficult to make a decision on the expediency or inappropriateness of its restoration.
  • This system includes a transmitter, means for supplying electrical pulses to the ultrasonic transducer, means for controlling the frequency of electrical pulses, a receiving transducer of ultrasonic pulses back into electrical electrical impulses.
  • the system takes into account only the amplified signals corresponding to the reflected ultrasonic signal from the zero level adjacent to the inner part of the tire under study, from the tire carcass layer and the level of the outermost layer.
  • the means for processing the amplified signals is thus designed to account for signals indicative of degradation or separation of layers according to their time delay. This technical solution is considered by the authors as an analogue.
  • the advantages of the proposed invention also consist in the location of the transmitter of the ultrasonic signal and its receiver together, which increases the accuracy of the system, as well as the presence of basic parameters for comparison, which allows you to determine the size of defects.
  • An additional advantage is the presence of filtering the parameters of the reflected waves.
  • the disadvantages of the invention under consideration include the presence of interference in the form of side lobes and the presence of a "dead zone".
  • the sound signal obtained with the help of a piezoelectric transducer is less short and wideband, more energy and time are required to study the CHS.
  • the closest in technical essence and the achieved result to the technical solution proposed by the authors is "Non-destructive method of testing materials and equipment for it" (patent CZ308186, IPC G01H 9/00, dated 12.02.2020).
  • an optical pulse is generated using a pulsed laser, the received signal is transmitted to the object of study, the generation of an ultrasonic signal in the near-surface layer of the object under study, the reception of signals reflected from the structural elements of the object of study by a piezoelectric receiver and analysis of these signals, while the piezoelectric receiver is located on the same axis with the area of formation of ultrasonic signals, which is perpendicular to the surface of the research object and is in constant contact with it.
  • a preamplifier and an analog-to-digital converter connected to a computing device are used, and the reflected ultrashort waves are compared with their reference values.
  • the advantages of the invention are the ability to create a powerful broadband pulse with minimal equipment size and energy consumption.
  • the disadvantages of the invention under consideration include a decrease in the measurement accuracy with an increase in the speed of movement of a single source of an ultrasonic pulse, as well as the complexity of constructing 3D models of objects of complex shapes, such as automobile tires.
  • the technical result of the proposed invention is the creation of a method for examining car tires, which allows with high accuracy, speed and reliability to identify their hidden defects and ensure that an informed decision is made about the advisability of their restoration by comparing 3D models obtained as a result of examining used tires with their reference 3D models. , as well as to determine and predict their degree of wear.
  • the technical result is achieved due to the fact that the inspected tires are cleaned of dirt and foreign inclusions, positioned on a horizontal surface, generate a series of light pulses using a repetitively pulsed laser, transmit the received signals through a fiber-optic cable to an optically transparent waveguide in contact with the inspected bus, transmit the received an acoustic signal to the surface layer of the inner side of the bus, the signals reflected from the structural elements of the tested bus are received by the piezoelectric receiver, moreover, the optically transparent waveguide and the piezoelectric receiver form a single unit, the axis of which is always perpendicular to the inner side of the bus at the point of contact of the waveguide with it, amplify the electrical signals generated by the piezoelectric receiver.
  • reception of acoustic signals reflected from the structural elements of the examined tire and its outer surface analyze these signals by comparing them with reference signals and build 3D models of the examined tire, while transmitting the received acoustic signal into the surface layer of the inner side of the tested tire and the reception of signals reflected from the structural elements of the examined bus is carried out sequentially through blocks arranged in one row, consisting of an optically transparent waveguide and piezoelectric receiver and forming groups, moreover, the minimum number of blocks in a group is sixteen or always a multiple of eight, and the delay time of laser pulses supplied to neighboring blocks of the group is determined by the response time of the acoustic signal from the internal elements of the tested bus, while the duration of the laser pulses that determine the frequency range of ultrasonic signals is selected based on the maximum thickness of the tested tire and the attenuation of ultrasonic signals in the material from which it is made.
  • a group of blocks located in one row is moved along the inner surface of the examined car tire in a spiral, the axis of which coincides with the axis of rotation of the examined tire, while the angular velocity of movement of this group is unchanged during the entire time of the tire inspection, and its value is determined the response time of signals reflected from the internal elements of the examined bus, and the step of moving a group of blocks along the vertical axis of a given spiral, is equal to the required accuracy of constructing a model of the internal structure of the examined automobile tire.
  • a group of blocks located in one row is pressed against the inner surface of the tested tire during its movement element by element and in such a way that the axis of each block included in its composition is always perpendicular to the inner surface of the tire at the point of their contact.
  • the claimed technical result is also achieved by the fact that the place of contact of a group of blocks located in one row is constantly moistened with an immersion liquid during the inspection of a car tire.
  • all construction during inspections of 3D models of tires are stored in digital form throughout the entire operation of the tire and are used in comparing the 3D model obtained during the last inspection of the tire with the 3D model of the reference tire, while comparison of the obtained 3D models with the reference model is carried out in the same order as they were created.
  • Fig. 1 shows a sample of visualization of an ultrasonic reference signal
  • Fig. 2 is a sample of visualization of an ultrasonic signal in an undisturbed section of the tire
  • FIG. 3 is a sample of visualization of an ultrasonic signal in a tire having a break
  • FIG. 4 is a sample of visualization of an ultrasonic signal in a tire section containing a metal frame element.
  • the method is carried out as follows.
  • the KGSH removed from the car or other wheeled vehicles, is washed and inspected, removing foreign objects stuck in the tread elements.
  • the car tire prepared for examination is placed on a flat horizontal platform and centered relative to its axis of rotation. For this, appropriate markings and devices are used, similar to those used for tire fitting.
  • a series of light pulses are generated using a pulse-periodic laser, the received signals are transmitted through a fiber-optic cable to an optically transparent waveguide in contact with the inner surface of the tested bus and the signals reflected from the structural elements of the examined bus are received by a piezoelectric detector.
  • plexiglass prisms placed in metal cases are used, one end of which is in contact with the surface of the tested tire, and the other end is connected to a piezoelectric element.
  • Each such prism forms a separate unit, in which an optically transparent waveguide is connected through an optical system with a repetitively pulsed laser, and a piezoelectric element with an analog multiband preamplifier.
  • These blocks are collected in a group in the form of a line, the axis of which coincides with the specified direction of inspection of the car tire.
  • the blocks included in the group are pressed against it separately in order to maintain constant contact between the optically transparent waveguide and this surface, as well as to ensure the perpendicular position of the waveguide axis and the place of its contact with the tire surface.
  • the distances between blocks included in one group are always the same, and it cannot be less than half the diameter of an optically transparent acoustic waveguide.
  • the place of contact between the waveguides and the inner surface of the car tire is wetted with an immersion liquid, for example, water.
  • the parameters of the tested bus are specified, namely the speed of the ultrasonic signal, and the speed of movement of the group of blocks is set, as well as the delay time of the laser pulses, which is determined by the response time of the signals reflected from the internal elements of the examined bus.
  • the ultrasonic signal used for this is characterized as "reference”.
  • An example of visualization of such a signal is shown in Fig. 1. The data obtained in this case is used to inspect the entire batch of tires of a given article.
  • a car tire is examined by moving a working group of blocks along its inner surface.
  • the trajectory of movement of a group of blocks has the shape of a spiral, the axis of which coincides with the axis of rotation of the examined tire.
  • the data on the angular velocity of movement of a group of blocks and the delay time of laser pulses obtained at the previous stage are used.
  • the step of moving a group of blocks along the vertical axis of the spiral along which its movement is carried out is set based on the required accuracy of constructing a 3D model of the internal structure of the examined car tire. It is also the same for all tires of the same article.
  • All data coming from the blocks of the group to the analog multiband preamplifier is transmitted to the converter, where they are digitized.
  • the digitized information is converted by a computer using a back projection algorithm and displayed in a visual form using a graphics processor.
  • FIG. 2 is a sample of an ultrasonic signal in an undisturbed section of the tire that does not contain metal frame elements
  • FIG. 3 is a sample of an ultrasonic signal in a tire with a rupture, but also not containing metal frame elements
  • FIG. 4 a sample of an ultrasonic signal in a tire containing a metal frame element.
  • a prerequisite for the implementation of the proposed method is the constant moistening of the immersion liquid of the inner surface of the examined tire along the trajectory of the group of blocks. This reduces the distortion of the received reflected signal and facilitates the process of moving a group of blocks by reducing the friction force.
  • the obtained 3D model of the examined tire is compared with the reference model obtained earlier, for example, when examining a tire of this article that has not yet been used.
  • the comparison of the most recent 3D model of the examined tire is made sequentially, comparing it with the 3D models stored in digital form, obtained earlier and only after that comparing it with the reference model.
  • the entire construction of the 3D model of the tire during inspections is stored in digital form throughout the operation of this tire.
  • tire inspections can be carried out in part, even without removing the tire from the vehicle.
  • a group of blocks moves in manual mode along a visually determined trajectory.
  • the 3D model of the tire is not built, but in real time the presence of certain defects that do not manifest themselves on its surface is determined in real time.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

L'invention se rapporte au domaine de l'industrie des pneumatiques et concerne notamment des procédés d'inspection de pneumatiques automobiles. Le résultat technique consiste en une grande précision, et la rapidité et la fiabilité de révélation de défauts cachés de pneumatiques. L'invention consiste à utiliser des impulsions ultrasoniques puissantes et à bande large générées par un laser impulsion périodique qui sont envoyées vers le pneumatique examiné via un guide d'onde optiquement transparent en contact avec celui-ci, et à recevoir les signaux réfléchis depuis les éléments structurels du pneumatique examiné à l'aide d'un piézorécepteur. L'émission des impulsions ultrasoniques et la réception des signaux réfléchis depuis les éléments structurels du pneumatique se font successivement à l'aide d'unités disposées en une rangée qui combinent dans leur composition un guide d'onde acoustique et un piézorécepteur, et le mouvement du groupe formé par ces derniers se fait selon une spirale dont l'axe coïncide avec l'axe de rotation du pneumatique examiné.
PCT/RU2021/050072 2020-03-18 2021-03-17 Procédé d'inspection de pneumatiques automobiles Ceased WO2021188019A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2020111304 2020-03-18
RU2020111304A RU2781773C2 (ru) 2020-03-18 Способ обследования автомобильных шин

Publications (1)

Publication Number Publication Date
WO2021188019A1 true WO2021188019A1 (fr) 2021-09-23

Family

ID=77745196

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2021/050072 Ceased WO2021188019A1 (fr) 2020-03-18 2021-03-17 Procédé d'inspection de pneumatiques automobiles

Country Status (1)

Country Link
WO (1) WO2021188019A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120131995A1 (en) * 2009-06-10 2012-05-31 Universidad Catolica Del Norte Method for Inspecting Tires, Enabling the On-Site Detector of Defects, the State of Wear of the Rubber, or the internal Condition of the Tire
RU2678224C1 (ru) * 2015-11-19 2019-01-24 Пирелли Тайр С.П.А. Способ и линия контроля шин для колес транспортных средств
EP3289330B1 (fr) * 2015-04-30 2020-01-01 Pirelli Tyre S.p.A. Procédé et appareil de vérification de pneus, dans un procédé et usine de fabrication de pneus pour roues de véhicule
CZ308186B6 (cs) * 2018-08-07 2020-02-12 Alexander KRAVCOV Způsob nedestruktivní kontroly materiálů a zařízení pro jeho provádění

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120131995A1 (en) * 2009-06-10 2012-05-31 Universidad Catolica Del Norte Method for Inspecting Tires, Enabling the On-Site Detector of Defects, the State of Wear of the Rubber, or the internal Condition of the Tire
EP3289330B1 (fr) * 2015-04-30 2020-01-01 Pirelli Tyre S.p.A. Procédé et appareil de vérification de pneus, dans un procédé et usine de fabrication de pneus pour roues de véhicule
RU2678224C1 (ru) * 2015-11-19 2019-01-24 Пирелли Тайр С.П.А. Способ и линия контроля шин для колес транспортных средств
CZ308186B6 (cs) * 2018-08-07 2020-02-12 Alexander KRAVCOV Způsob nedestruktivní kontroly materiálů a zařízení pro jeho provádění

Also Published As

Publication number Publication date
RU2020111304A (ru) 2021-09-20
RU2020111304A3 (fr) 2021-09-20

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