WO2019225276A1 - タイヤ外傷検出システム及びタイヤ外傷検出プログラム - Google Patents
タイヤ外傷検出システム及びタイヤ外傷検出プログラム Download PDFInfo
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- WO2019225276A1 WO2019225276A1 PCT/JP2019/017486 JP2019017486W WO2019225276A1 WO 2019225276 A1 WO2019225276 A1 WO 2019225276A1 JP 2019017486 W JP2019017486 W JP 2019017486W WO 2019225276 A1 WO2019225276 A1 WO 2019225276A1
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Classifications
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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
- B60C19/00—Tyre parts or constructions not otherwise provided for
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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
- B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/60—Analysis of geometric attributes
- G06T7/62—Analysis of geometric attributes of area, perimeter, diameter or volume
-
- 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
- B60C2200/00—Tyres specially adapted for particular applications
- B60C2200/06—Tyres specially adapted for particular applications for heavy duty vehicles
- B60C2200/065—Tyres specially adapted for particular applications for heavy duty vehicles for construction vehicles
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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
- B60C25/00—Apparatus or tools adapted for mounting, removing or inspecting tyres
- B60C25/002—Inspecting tyres
- B60C25/007—Inspecting tyres outside surface
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30108—Industrial image inspection
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30248—Vehicle exterior or interior
- G06T2207/30252—Vehicle exterior; Vicinity of vehicle
Definitions
- the present invention relates to a tire injury detection system and a tire injury detection program for detecting an injury at a tire side portion.
- Patent Document 1 a method of detecting a crack on a concrete surface and a width of the crack (crack width) by executing image processing on image data obtained by imaging the surface of a concrete structure has been proposed.
- Patent Document 1 describes that the width of a crack is detected by imaging a concrete structure and a scale that can specify the width of the crack together.
- Tires for detecting cracks by analyzing image data as described above and methods for detecting the width of the cracks particularly tires (tires for construction vehicles) mounted on vehicles (construction vehicles) traveling on rough terrain such as mines, etc. It is conceivable to apply it to the side part trauma detection.
- the present invention has been made in view of such a situation, and provides a tire injury detection system and a tire injury detection program capable of detecting an injury of a tire side portion without using a reference such as a scale. With the goal.
- One aspect of the present invention is a tire trauma detection system comprising a rim wheel (rim wheel 30) and a tire side portion (tire side portion 21a) of a tire (for example, tire 21) assembled to the rim wheel.
- An image data acquisition unit image data acquisition unit 120 that acquires image data including the rim information acquisition unit (rim information acquisition unit) that acquires rim information including the radial size of the rim wheel associated with the tire 130) and a trauma detection for detecting a trauma portion (crack C) of the tire side portion based on the image data and detecting a size of the trauma portion based on the diameter of the rim wheel based on the rim information.
- Unit trauma detection unit 140
- an output unit output unit that outputs information on the trauma portion detected by the trauma detection unit.
- One aspect of the present invention is a tire injury detection program, an image data acquisition process for acquiring image data including a rim wheel and a tire side portion of a tire assembled to the rim wheel, and the tire
- the rim information acquisition process for acquiring the rim information of the rim wheel being detected, and the trauma portion of the tire side portion based on the image data, and the diameter of the rim wheel based on the rim information
- a computer executes a trauma detection process for detecting the size of the trauma part and an output process for outputting information on the trauma part detected by the trauma detection process.
- FIG. 1 is an overall schematic configuration diagram of a tire trauma detection system 10.
- FIG. 2 is a single side view of the tire 21.
- FIG. 3 is a functional block configuration diagram of the mobile terminal 100.
- FIG. 4 is a diagram showing an overall operation flow for detecting a damaged portion of the tire side portion 21a by the mobile terminal 100.
- FIG. 5 is a diagram showing a detailed operation flow of the wound part detection.
- FIG. 6 is a diagram illustrating a region that is a target of image data on the side surface of the tire 21.
- FIG. 7 is a diagram illustrating an example of image data on the side surface of the tire 21.
- FIG. 8 is a diagram illustrating an example of image data in which only the wound portion estimated to be a crack is selected.
- FIG. 9 is a partially enlarged view of the wound portion shown in FIG.
- FIG. 1 is an overall schematic configuration diagram of a tire trauma detection system 10 according to the present embodiment.
- the tire injury detection system 10 includes a terminal device 60, a mobile terminal 100, and a tire information management server 200.
- the terminal device 60, the mobile terminal 100, and the tire information management server 200 are connected via the communication network 40.
- the construction vehicle 20 is a vehicle that travels on rough terrain such as a mine. Specifically, the construction vehicle 20 is a large dump truck. The construction vehicle 20 has a wireless communication function and can be connected to the tire injury detection system 10 via the communication network 40.
- the tires 21 and 22 are mounted on the construction vehicle 20.
- the tire 21 is mounted at the front wheel position, and the tire 22 is mounted at the rear wheel position.
- the configuration of the rear wheel may be a double tire.
- Worker 50 is involved in the operation of construction vehicle 20. Specifically, the worker 50 manages the states of the tires 21 and the tires 22 mounted on the construction vehicle 20, and performs work according to the necessity of tire replacement or repair. The worker 50 can use the terminal device 60 and the mobile terminal 100.
- the terminal device 60 is typically realized by a personal computer disposed in a site management office (backyard) such as a mine.
- the terminal device 60 is used for searching and acquiring tire information managed by the tire information management server 200.
- the portable terminal 100 is typically realized by a portable communication terminal such as a smartphone or a tablet terminal that can be connected to a mobile communication network (PLMN). Similar to the terminal device 60, the portable terminal 100 is used for searching and acquiring tire information managed by the tire information management server 200.
- PLMN mobile communication network
- the mobile terminal 100 is also used for detecting damage on the side surfaces of the tire 21 and the tire 22.
- the tire information management server 200 manages information related to the tire 21 and the tire 22. Specifically, the tire information management server 200 determines the type of the construction vehicle 20, the size of the tire 21, the tire 22 and the rim wheel 30 (not shown in FIG. 1, refer to FIG. 2), setting information (set internal pressure corresponding to the load). Etc.) and tire 21 and tire 22 (including the rim wheel 30) use history (traveling time, traveling distance, attachment / detachment, etc.).
- the tire information management server 200 updates the usage history and the like according to the input from the terminal device 60 or the mobile terminal 100.
- FIG. 2 is a single side view of the tire 21. As shown in FIG. 2, the tire 21 is assembled to the rim wheel 30. The tire 22 is also assembled to the rim wheel 30 in the same manner as the tire 21.
- the rim wheel 30 has a predetermined radial size (for example, 63 inches) corresponding to the specifications of the construction vehicle 20.
- a rim flange portion 31 is formed on the outer peripheral portion of the rim wheel 30.
- the shape (size) of the rim flange portion 31 varies depending on the specifications of the rim wheel 30.
- the radial size is a distance (diameter) that is twice the linear distance from the center CT of the rim wheel 30 to the radially outer end of the rim wheel 30, and does not include the rim flange portion 31. That is, the radial size of the rim wheel 30 including the rim flange portion 31 may be different from the radial size of the rim wheel 30 not including the rim flange portion 31.
- the outer diameter of the tire 21 is the sum of the radial size of the rim wheel 30 and the radial size of the tire side portion 21a.
- the tire side portion 21a means from the inner end in the tire radial direction of the bead portion (not shown) of the tire 21 to the contact end with the road surface R in the tire width direction of the tread portion (not shown) of the tire 21.
- the imageable range in the side view of the tire 21 may be interpreted as the tire side portion 21a.
- FIG. 3 is a functional block configuration diagram of the mobile terminal 100. As illustrated in FIG. 3, the mobile terminal 100 includes an imaging unit 110, an image data acquisition unit 120, a rim information acquisition unit 130, a trauma detection unit 140, and an output unit 150.
- the mobile terminal 100 includes a processor, a memory, an input device, a display, and the outside as hardware elements.
- the computer program (software) may be provided via the communication network 40, or may be recorded on a computer-readable recording medium such as an optical disk, a hard disk drive, or a flash memory.
- the imaging unit 110 can be configured by a digital camera element mounted on the mobile terminal 100. Specifically, the imaging unit 110 captures an image of the side surface of the tire 21 (and the tire 22, the same applies hereinafter). The imaging unit 110 outputs image data of the side surface of the tire 21.
- the image data acquisition unit 120 acquires image data of the side surface of the tire 21.
- the image data acquisition unit 120 basically acquires image data of the side surface of the tire 21 attached to the construction vehicle 20.
- the tire 21 may be removed from the construction vehicle 20 as long as the image data of the side surface of the tire 21 can be acquired with an accuracy that does not affect the processing of the trauma detection unit 140.
- the image data acquisition unit 120 acquires image data including the rim wheel 30 and the tire side portion 21a (see FIG. 2) of the tire 21 assembled to the rim wheel 30.
- the image data acquisition unit 120 acquires the image data of the side surface of the tire 21 imaged by the imaging unit 110. Note that the image data acquisition unit 120 may acquire image data of the side surface of the tire 21 captured by another method instead of the imaging unit 110.
- the rim information acquisition unit 130 acquires information (rim information) of the rim wheel 30 associated with the tire 21. Specifically, the rim information acquisition unit 130 acquires rim information including the radial size of the rim wheel 30.
- the radial size is the diameter (for example, 63 inches) of the rim wheel 30 (excluding the rim flange portion 31), and the radial size of the tire 21 is also defined based on the diameter.
- the rim information acquisition unit 130 may acquire the radial size input to the mobile terminal 100 by the worker 50, or provide a display (characters or figures) that can identify the radial size on the tire side portion 21a.
- the radial size may be acquired based on the display.
- the rim information acquisition unit 130 accesses the tire information management server 200 based on the peripheral information (for example, the type of the construction vehicle 20 or the tire size) input to the mobile terminal 100 by the worker 50, The direction size may be acquired.
- the rim information acquisition unit 130 may acquire the radial size by reading information of an RF tag attached to the tire 21 (rim wheel 30) using RFID (radio frequency identifier).
- RFID radio frequency identifier
- the rim information acquisition unit 130 can acquire rim information (rim type) including the radial size of the rim flange 31. As described above, since the radial size of the rim wheel 30 including the rim flange portion 31 may be different from the radial size (for example, 63 inches) of the rim wheel 30 not including the rim flange portion 31, the rim information acquisition unit 130 Obtains the radial size of the rim flange 31.
- the outer diameter of the rim wheel 30 included in the image data of the side surface of the tire 21 is actually a size obtained by adding the radial size of the annular rim flange portion 31 to the specification diameter of the rim wheel 30. This is because.
- the trauma detection unit 140 detects trauma of the tire side portion 21a. Specifically, the trauma detection unit 140 detects the trauma portion of the tire side portion 21a based on the image data acquired by the image data acquisition unit 120.
- the trauma detection unit 140 detects a crack in the tire side portion 21a. Since the construction vehicle 20 travels on rough terrain, the tire side portion 21a is liable to be damaged due to unevenness on the road surface. Since such cut flaws grow as cracks in the tire side portion 21a, it is desirable that they be detected early and reliably. In particular, when the crack exceeds a predetermined length or width, the tire 21 needs to be replaced or repaired to cause air leakage or the like.
- the trauma detection unit 140 uses a deep learning object recognition algorithm and an area division allyl algorithm to select a trauma part (crack) candidate (trauma candidate) of the tire side portion 21a included in the image data. To detect.
- the trauma detection unit 140 determines trauma candidates for the tire side portion 21a based on whether the trauma candidates included in the image data are darker than the surrounding area and whether the shape is longer than the predetermined shape. Narrow down.
- the trauma detection unit 140 further inputs the narrowed trauma candidates to a deep learning classifier (deep learning determination device), and determines whether the trauma candidate of the tire side portion 21a is a crack. Thereby, the trauma detection unit 140 detects the trauma portion of the tire side portion 21a.
- a deep learning classifier deep learning determination device
- the trauma detection unit 140 detects the size of the trauma portion based on the diameter of the rim wheel 30 based on the rim information acquired by the rim information acquisition unit 130.
- the trauma detection unit 140 detects the size of the trauma portion based on the ratio between the diameter of the rim wheel 30 included in the image data and the length and width of the trauma portion.
- the trauma detection unit 140 is a trauma portion based on the diameter of the rim wheel 30 including the rim flange portion 31. Detect the size of.
- the trauma detection unit 140 detects the width of a crack located within a predetermined range from a ground contact portion where the tire 21 is in contact with the road surface R (see FIG. 2).
- the width of a crack if the crack is not positioned in the vicinity of the ground contact portion, the crack is not opened by a load, and it becomes difficult to detect the width of the crack based on image data.
- the trauma detection unit 140 detects, for example, the width of a crack located within a range of ⁇ 10 to 15 ° with respect to the center of the ground contact portion in the tire circumferential direction (traveling direction).
- the output unit 150 outputs information on the trauma portion detected by the trauma detection unit 140. Specifically, the output unit 150 can output the position, length, and width of a crack generated in the tire side portion 21a.
- FIG. 4 shows an overall operation flow for detecting a damaged portion of the tire side portion 21a by the mobile terminal 100.
- the portable terminal 100 acquires image data of the side surface of the tire 21 (S10). Specifically, the mobile terminal 100 acquires image data including the rim wheel 30 and the tire side portion 21a. As described above, the mobile terminal 100 may acquire the image data by the digital camera element mounted on the mobile terminal 100, or the image data of the side surface of the tire 21 captured by another method may be used as a communication network. It may be obtained via 40 or the like.
- FIG. 6 shows a target region of image data on the side surface of the tire 21.
- the mobile terminal 100 cuts out a region A1 on the side surface of the tire 21 from the still image data including the construction vehicle 20. Further, the mobile terminal 100 cuts out a region A2 on the side surface of the rim wheel 30 (including the rim flange portion 31) from the included still image data.
- the mobile terminal 100 may change the size of the extracted image data of the area A1 and the area A2 to a size that allows easy processing, as necessary.
- FIG. 7 shows an example of image data on the side surface of the tire 21.
- the surface of the tire side portion 21a has a lot of trauma such as cracks and scratches, dirt, and the like (black portions in the figure).
- the portable terminal 100 acquires the rim type (including size) of the rim wheel 30 included in the acquired image data (see FIG. 7) (S20). Specifically, the mobile terminal 100 includes the rim wheel 30 including the rim flange portion 31 based on the radial size (for example, 63 inches) of the rim wheel 30 and the type (rim type) of the rim flange portion 31. Get the radial size (eg 63 inches + 1.5 inches).
- the mobile terminal 100 detects the rim wheel 30, specifically, the center CT (see FIG. 2) of the tire 21 assembled to the rim wheel 30 based on the acquired image data (S30).
- the mobile terminal 100 detects a damaged portion (crack) of the tire side portion 21a based on the acquired image data (S40).
- S40 acquired image data
- the mobile terminal 100 outputs information on the detected trauma part (S50). Specifically, the mobile terminal 100 outputs the position, length, and width of a crack generated in the tire side portion 21a.
- the position of the crack may be indicated by a combination of the position in the tire radial direction and the angle from the reference position (for example, the position of the air valve) in the tire circumferential direction of the tire 21 (or rim wheel 30). You may show by the image containing the reference
- FIG. 5 shows a detailed operation flow for trauma part detection. Specifically, FIG. 5 shows a detailed operation flow of the wound part detection of S40 described above.
- the mobile terminal 100 aggregates pixels having similar brightness among pixel information (pixels) included in the cut-out image data (see FIG. 7) (S101). As a result, the mobile terminal 100 primarily selects a trauma candidate included in the cut-out image data.
- the portable terminal 100 determines whether or not the selected injury candidate is located on the tire side portion 21a (S103).
- the mobile terminal 100 determines whether or not the selected injury candidate is an area darker than the surrounding area (S105). This is because an area darker than the periphery among pixels having similar brightness is likely to be a crack.
- the mobile terminal 100 determines whether or not the selected injury candidate is a shape that is longer than the predetermined shape (S107). Specifically, the mobile terminal 100 has a ratio (L / W) of a size (length L) along the tire radial direction of a trauma candidate and a size (width W) along the tire circumferential direction of the trauma candidate. Based on whether or not a predetermined value (for example, 2.0) is exceeded, it is determined whether or not the wound candidate has a shape that is longer than the predetermined shape.
- a predetermined value for example, 2.0
- the mobile terminal 100 inputs the detected injury candidate to the classifier by deep learning, and determines whether or not the injury candidate is a crack (S108).
- the mobile terminal 100 detects a damaged portion of the tire side portion 21a that is estimated to be a crack based on the processing results in S103 to S108 (S109). Furthermore, the portable terminal 100 finally selects a damaged portion of the tire side portion 21a that is estimated to be a crack by a classifier using deep learning.
- the mobile terminal 100 detects the size of the wound portion based on the ratio between the diameter of the rim wheel 30 and the detected length and width of the wound portion.
- FIG. 8 shows an example of image data in which only the trauma portion estimated to be a crack is selected as a result of the processing up to S109. Specifically, FIG. 8 shows a state after the wound portion detection process is executed on the image data of the side surface of the tire 21 shown in FIG.
- FIG. 9 is a partially enlarged view of the trauma portion shown in FIG.
- the crack C has an elongated shape rather than a predetermined shape.
- the ratio (L / W) between the length L of the crack C (trauma candidate) along the tire radial direction and the width W of the crack C along the tire circumferential direction is a predetermined value. (For example, 2.0).
- the length L along the tire radial direction is not necessarily parallel to the tire radial direction, and may be slightly inclined according to the shape of the crack C.
- the tire trauma detection system 10 detects the trauma portion of the tire side portion 21a based on image data including the rim wheel 30 and the tire side portion 21a, and based on the rim information. Thus, the size of the trauma portion based on the diameter of the rim wheel 30 is detected. Further, the tire trauma detection system 10 outputs information (position, size) of the detected trauma portion.
- a trauma portion (trauma candidate) of the tire side portion 21a can be easily detected by a relatively simple operation of acquiring image data including the rim wheel 30 and the tire side portion 21a.
- a special standard such as a scale (ruler) is imaged together with the tire 21 (or tire 22). There is no need to do.
- the tire injury detection system 10 it is possible to detect an injury on the tire side portion without using a reference such as a scale.
- the tire trauma detection system 10 uses the cracks in the tire side portion 21a as trauma portions based on whether the trauma candidates are darker than the surrounding area and whether the shape is longer than a predetermined shape. To detect. For this reason, it is possible to more accurately detect a crack in the tire side portion 21a while discriminating it from other trauma (such as an abrasion) and dirt.
- the tire trauma detection system 10 can detect the size of the trauma portion based on the diameter of the rim wheel 30 including the rim flange portion 31. For this reason, even when a plurality of types of the rim flange portion 31 are defined, it is possible to detect an accurate size of the damaged portion.
- the tire trauma detection system 10 detects the width W of a crack located within a predetermined range from the ground contact portion where the tire 21 is in contact with the road surface R. This is because when detecting the width W, detecting the width W in a state in which the crack is opened by the load is useful for determining whether the tire 21 is to be replaced or repaired.
- the tire injury detection system 10 can output the position, length L, and width W of the crack. For this reason, the worker 50 and the like can accurately determine whether or not the tire 21 needs to be replaced or repaired.
- the size of the wound portion is detected based on the diameter of the rim wheel 30 including the rim flange portion 31, but such processing is not necessarily essential.
- the shape of the rim flange portion 31 is only one type depending on the type of the construction vehicle 20, the diameter of the rim wheel 30 including the rim flange portion 31 may be used in advance.
- the trauma detection unit 140 determines whether the tire side portion 21a has a trauma candidate included in the image data based on whether the area is darker than the surrounding area and whether the shape is longer than the predetermined shape. We narrowed down the trauma candidates and entered the narrowed trauma candidates into the deep learning classifier (deep learning discriminator) to determine whether or not the trauma candidates on the tire side portion 21a were cracks.
- the trauma candidate included in the image data may be directly input to the classifier.
- the image data of the side surface of the tire 21 is acquired using the imaging unit 110 of the mobile terminal 100, but a fixed camera is installed at a gate or the like through which the construction vehicle 20 passes.
- the side surface of the tire 21 may be imaged when the construction vehicle 20 passes.
- the tire injury detection system 10 is configured by the terminal device 60, the mobile terminal 100, and the tire information management server 200, but not all devices are necessarily required.
- the terminal device 60 is not essential.
- the functions of the mobile terminal 100 may be realized by the terminal device 60.
- the information managed by the tire information management server 200 may be held in the portable terminal 100 (memory).
- the dump truck has been described as an example.
- other construction vehicles such as an articulated dump truck and a wheel loader may be used.
- the rear wheel of the construction vehicle 20 is a double tire, it is conceivable to acquire image data of the side surface of the tire when the inner rear wheel is removed from the construction vehicle 20.
- the outer tire side portion 21a is likely to crack when the vehicle is mounted, the inner rear wheel of the double tire is relatively less likely to crack.
- Tire Injury Detection System 20 Construction Vehicle 21, 22 Tire 21a Tire Side 30 Rim Wheel 31 Rim Flange 40 Communication Network 50 Worker 60 Terminal Device 100 Mobile Terminal 110 Imaging Unit 120 Image Data Acquisition Unit 130 Rim Information Acquisition Unit 140 Injury Detection unit 150 Output unit 200 Tire information management server
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Abstract
Description
図1は、本実施形態に係るタイヤ外傷検出システム10の全体概略構成図である。図1に示すように、タイヤ外傷検出システム10は、端末装置60、携帯端末100及びタイヤ情報管理サーバ200によって構成される。端末装置60、携帯端末100及びタイヤ情報管理サーバ200は、通信ネットワーク40を介して接続される。
次に、タイヤ外傷検出システム10の機能ブロック構成について説明する。具体的には、携帯端末100の機能ブロック構成について説明する。上述したように、本実施形態では、携帯端末100は、タイヤ21及びタイヤ22の側面の外傷検出に用いられる。
次に、上述したタイヤ外傷検出システム10の動作について説明する。具体的には、タイヤ外傷検出システム10(携帯端末100)によるタイヤサイド部の外傷部分の検出動作について説明する。以下では、タイヤ21を例として説明するが、タイヤ22についても同様の動作が適用される。
図4は、携帯端末100によるタイヤサイド部21aの外傷部分検出の全体動作フローを示す。
図5は、外傷部分検出の詳細動作フローを示す。具体的には、図5は、上述したS40の外傷部分検出の詳細動作フローを示す。
上述した実施形態によれば、以下の作用効果が得られる。具体的には、タイヤ外傷検出システム10(携帯端末100)は、リムホイール30と、タイヤサイド部21aとを含む画像データに基づいてタイヤサイド部21aの外傷部分を検出するとともに、リム情報に基づいて、リムホイール30の径を基準とした当該外傷部分のサイズを検出する。さらに、タイヤ外傷検出システム10は、検出した当該外傷部分の情報(位置、サイズ)を出力する。
以上、実施例に沿って本発明の内容を説明したが、本発明はこれらの記載に限定されるものではなく、種々の変形及び改良が可能であることは、当業者には自明である。
20 建設車両
21, 22 タイヤ
21a タイヤサイド部
30 リムホイール
31 リムフランジ部
40 通信ネットワーク
50 作業員
60 端末装置
100 携帯端末
110 撮像部
120 画像データ取得部
130 リム情報取得部
140 外傷検出部
150 出力部
200 タイヤ情報管理サーバ
Claims (6)
- リムホイールと、前記リムホイールに組み付けられたタイヤのタイヤサイド部とを含む画像データを取得する画像データ取得部と、
前記タイヤと対応付けられている前記リムホイールの径方向サイズを含むリム情報を取得するリム情報取得部と、
前記画像データに基づいてタイヤサイド部の外傷部分を検出するとともに、前記リム情報に基づいて前記リムホイールの径を基準とした前記外傷部分のサイズを検出する外傷検出部と、
前記外傷検出部によって検出された前記外傷部分の情報を出力する出力部と
を備えるタイヤ外傷検出システム。 - 前記外傷検出部は、前記画像データに含まれる外傷候補のうち、周辺よりも暗い領域か否か、及び所定形状よりも細長い形状か否かに基づいて、前記タイヤサイド部の亀裂を前記外傷部分として検出する請求項1に記載のタイヤ外傷検出システム。
- 前記外傷検出部は、前記タイヤが路面と接地している接地部分から所定範囲内に位置する前記亀裂の幅を検出する請求項2に記載のタイヤ外傷検出システム。
- 前記出力部は、前記亀裂の位置、長さ及び幅を出力する請求項3に記載のタイヤ外傷検出システム。
- 前記リム情報取得部は、前記リムホイールのリムフランジ部の径方向サイズを含む前記リム情報を取得し、
前記外傷検出部は、前記リムフランジ部を含む前記リムホイールの径を基準とした前記外傷部分のサイズを検出する請求項1乃至4の何れか一項に記載のタイヤ外傷検出システム。 - リムホイールと、前記リムホイールに組み付けられたタイヤのタイヤサイド部とを含む画像データを取得する画像データ取得処理と、
前記タイヤと対応付けられている前記リムホイールのリム情報を取得するリム情報取得処理と、
前記画像データに基づいてタイヤサイド部の外傷部分を検出するとともに、前記リム情報に基づいて前記リムホイールの径を基準とした前記外傷部分のサイズを検出する外傷検出処理と、
前記外傷検出処理によって検出された前記外傷部分の情報を出力する出力処理と
をコンピュータに実行させるタイヤ外傷検出プログラム。
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