A portion of the disclosure of this patent document contains material that is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent files or records, but otherwise reserves all copyright rights whatsoever. The following notice applies to the disclosure provided herein and to the drawings that form a part of this document: Copyright 2018-2021 PhotoGAUGE, Inc., All Rights Reserved.
This patent application relates to computer-implemented software systems, metrology systems, photogrammetry-based systems, and automatic visual measurement or inspection systems, according to example embodiments, and more specifically to a system and method for measurement of inflation pressure and load of tires from three-dimensional (3D) geometry measurements.
Inflation pressure and compressive load on vehicle tires have a strong influence on their mechanical performance. Therefore, predicting tire performance depends critically on precise measurement of these quantities. However, such measurements are not easily performed in the field where tires are commonly used, e.g. on a highway or in an underground mine.
While there are pressure gauges and remote tire pressure sensors (commonly referred to as Tire Pressure Measurement Systems, or TPMS) to measure inflation pressure, the former is a contact type measurement requiring manual operation while the latter represents an investment for the tire owner. Measurement of compressive load on a tire is much more difficult in general as there are no direct compressive load measurement tools available.
Often, one can arrive at an average load knowing the total load on the vehicle and the number and distribution of tires on the vehicle. However, such techniques are too simplistic for measurement of the individual compressive load on a specific tire on a vehicle when the distribution of the load on the vehicle is asymmetric. Asymmetric loading is common in construction and mining vehicles (e.g., in mining trucks carrying excavated ores), which can be oddly shaped.
More recently, sensors such as accelerometers have been built into tires and empirical relationships derived to compute tire loads from accelerometer data obtained during use. However, these techniques suffer from the same drawbacks as TPMS, i.e., the additional cost of this technology.
In various example embodiments described herein, a system and method for measurement of inflation pressure and load of tires from three-dimensional (3D) geometry measurements are disclosed. In the various example embodiments described herein, a tire analysis tool is provided to address the shortcomings of the conventional technologies for measurement of inflation pressure and compressive loads on tires as described above. In the various example embodiments, systems and methods are disclosed for calculating vehicle tire inflation pressure and compressive load from a set of still images or a video clip, thus enabling non-contact measurements anywhere anytime.
For any given vehicle tire design (e.g., the composition, geometry, and usage of the tire), the inflation pressure and compressive load produce a unique tire signature related to the 3D shape of the tire. This unique tire signature is therefore associated with the inflation pressure and compressive load of a particular tire at a moment in time when the unique tire signature is captured. An accurate capture and measurement of the 3D shape of at least a portion of the tire (e.g., the unique tire signature) can be used to determine and associate the unique combination of pressure and compressive load that produces the measured 3D shape of the tire.
In the various example embodiments described herein, accurate capture of the 3D tire shapes (e.g., capture of the unique tire signature) can be obtained by a variety of means, including: white-light scanners, LiDAR (Light Detection and Ranging technology), cameras, infrared (IR) or thermal imaging systems, photogrammetry-based reconstructions, and the like. As disclosed herein, many of these unique tire signature capture systems can be installed in or on a vehicle to automatically capture the 3D shape of the vehicle tire without human intervention. As described in more detail below, the data associated with the capture of the unique tire signature of a vehicle tire can be analyzed and the current inflation pressure and load on the tire can be determined in real-time, without human intervention, and without contact with the tire. Details of the various example embodiments are provided below.
The various embodiments are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings in which:
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the various embodiments. It will be evident, however, to one of ordinary skill in the art that the various embodiments may be practiced without these specific details.
In various example embodiments described herein, a system and method for measurement of inflation pressure and load of tires from three-dimensional (3D) geometry measurements are disclosed. In the various example embodiments described herein, a tire analysis system can be implemented on a computing platform, such as the computing platform described below in connection with
In the various example embodiments described herein, accurate capture of the 3D tire shapes (e.g., capture of the unique tire signature) can be obtained by a variety of perception sensing means, including: white-light scanners, LiDAR (Light Detection and Ranging technology), cameras, photogrammetry-based reconstructions, X-ray imaging devices, thermal imaging devices, Radar devices, acoustic data receivers, lasers, and the like. A white light scanner (WLS) is a well-known device for performing surface height measurements of an object using coherence scanning interferometry (CSI) with spectrally-broadband “white light” illumination. LiDAR is a well-known technology for measuring distances by illuminating the target with laser light and measuring the reflection with a sensor. Differences in laser return times and wavelengths can then be used to make digital 3D representations of the target. Photogrammetry refers to the science of making measurements from photographs or images. The input to photogrammetry is typically photographs or images, and the output is typically a map, a drawing, a measurement, or a three-dimensional (3D) model of some real-world object or scene captured in the photographs or images. It will be apparent to those of ordinary skill in the art in view of the disclosure herein that other well-known perception data capture technologies can be used to capture the unique signature of a vehicle tire in real-time, without human intervention, and without contact with the tire. As disclosed herein, many of these unique tire signature capture systems can be installed in or on a vehicle to automatically capture the 3D shape of the vehicle tire. In addition to tire shape, the unique tire signature can also be based on the capture of a set of points of the tire from various types of sensors, including the perception sensing devices listed above. For example, a unique tire signature can be based on a set of acoustic pulses applied to a tire at various points on the tire and receiving the acoustic returns from the set of points. As described in more detail below, the data associated with the capture of the unique tire signature of a vehicle tire can be analyzed by the tire analysis system and the current inflation pressure and load on the tire can be determined in real-time, without human intervention, and without contact with the tire.
Referring now to
Referring still to
In another example embodiment, a white-light scanner or LiDAR scanner can be used by a human operator or in an automated setup to acquire perception data of a tire under analysis. Using the white-light scanner perception data or LiDAR perception data, the image analysis system of an example embodiment can generate an accurate 3D shape of the tire, representing the unique tire signature, from the captured perception data.
Once the unique signature of a tire under analysis is generated from the received or captured perception data, the unique tire signature can be compared to a baseline tire signature retrieved from a baseline tire signature database or 3D tire shape database. As described in more detail below, the baseline tire signature database retains a plurality of baseline tire signatures for a variety of different types and sizes of tires under a variety of different conditions, such as inflation pressures, compressive loads, temperature, precipitation, terrain, wear patterns, etc. The baseline tire signature database can create an association between a particular unique signature of a tire and the inflation pressure and compressive load that created the unique tire signature. The unique tire signature of a tire under analysis can be compared to a baseline tire signature corresponding to a same or similar type and size of tire under similar conditions. Based on this comparison of elements in the baseline tire signature database, the tire analysis system can determine the particular combination of inflation pressure and compressive load that produces the 3D shape corresponding to the unique tire signature of the tire under analysis. In this manner, the tire analysis system of an example embodiment can determine the current inflation pressure and compressive load on a vehicle tire in real-time, without human intervention, and without contact with the tire.
In an example embodiment, the baseline tire signature database, and the baseline tire signature elements therein, can be generated and used in one of several ways. One way to generate the database-resident baseline tire signature elements, each representing specific combinations of inflation pressures and compressive loads, is described below.
Referring now to
Various embodiments of the tire analysis system 100 as disclosed herein can be used with any of a variety of mathematical techniques that can be used to construct and derive the baseline tire signature database, compare a unique tire signature of a tire under analysis to a baseline tire signature corresponding to a same or similar type and size of tire under similar conditions, and determine an unknown inflation pressure and compressive load from a scan of a portion of a tire under analysis.
Referring now to
The example mobile computing and/or communication system 700 includes a data processor 702 (e.g., a System-on-a-Chip (SoC), general processing core, graphics core, and optionally other processing logic) and a memory 704, which can communicate with each other via a bus or other data transfer system 706. The mobile computing and/or communication system 700 may further include various input/output (I/O) devices and/or interfaces 710, such as a touchscreen display, an audio jack, and optionally a network interface 712. In an example embodiment, the network interface 712 can include one or more radio transceivers configured for compatibility with any one or more standard wireless and/or cellular protocols or access technologies (e.g., 2nd (2G), 2.5, 3rd (3G), 4th (4G) generation, and future generation radio access for cellular systems, Global System for Mobile communication (GSM), General Packet Radio Services (GPRS), Enhanced Data GSM Environment (EDGE), Wideband Code Division Multiple Access (WCDMA), LTE, CDMA2000, WLAN, Wireless Router (WR) mesh, and the like). Network interface 712 may also be configured for use with various other wired and/or wireless communication protocols, including TCP/IP, UDP, SIP, SMS, RTP, WAP, CDMA, TDMA, UMTS, UWB, WiFi, WiMax, Bluetooth™, IEEE 802.11x, and the like. In essence, network interface 712 may include or support virtually any wired and/or wireless communication mechanisms by which information may travel between the mobile computing and/or communication system 700 and another computing or communication system via network 714.
The memory 704 can represent a machine-readable medium on which is stored one or more sets of instructions, software, firmware, or other processing logic (e.g., logic 708) embodying any one or more of the methodologies or functions described and/or claimed herein. The logic 708, or a portion thereof, may also reside, completely or at least partially within the processor 702 during execution thereof by the mobile computing and/or communication system 700. As such, the memory 704 and the processor 702 may also constitute machine-readable media. The logic 708, or a portion thereof, may also be configured as processing logic or logic, at least a portion of which is partially implemented in hardware. The logic 708, or a portion thereof, may further be transmitted or received over a network 714 via the network interface 712. While the machine-readable medium of an example embodiment can be a single medium, the term “machine-readable medium” should be taken to include a single non-transitory medium or multiple non-transitory media (e.g., a centralized or distributed database, and/or associated caches and computing systems) that stores the one or more sets of instructions. The term “machine-readable medium” can also be taken to include any non-transitory medium that is capable of storing, encoding or carrying a set of instructions for execution by the machine and that cause the machine to perform any one or more of the methodologies of the various embodiments, or that is capable of storing, encoding or carrying data structures utilized by or associated with such a set of instructions. The term “machine-readable medium” can accordingly be taken to include, but not be limited to, solid-state memories, optical media, and magnetic media.
As described herein for various example embodiments, a system and method for measurement of inflation pressure and load of tires from three-dimensional (3D) geometry measurements are disclosed. In various embodiments, a software application program is used to enable the capture and processing of images on a computing or communication system, including mobile devices. As described above, in a variety of contexts, the various example embodiments can be configured to automatically capture images of a vehicle tire being analyzed, all from the convenience of a portable electronic device, such as a smartphone. This collection of images can be processed and results can be distributed to a variety of network users. As such, the various embodiments as described herein are necessarily rooted in computer and network technology and serve to improve these technologies when applied in the manner as presently claimed. In particular, the various embodiments described herein improve the use of mobile device technology and data network technology in the context of automated object visual inspection via electronic means.
The Abstract of the Disclosure is provided to allow the reader to quickly ascertain the nature of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. In addition, in the foregoing Detailed Description, it can be seen that various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments require more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive subject matter lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby incorporated into the Detailed Description, with each claim standing on its own as a separate embodiment.
This is a continuation-in-part (CIP) patent application claiming priority to U.S. non-provisional patent application Ser. No. 17/128,141, filed on Dec. 20, 2020; which is a continuation application of patent application Ser. No. 16/023,449, filed on Jun. 29, 2018. This is also a CIP patent application claiming priority to U.S. non-provisional patent application Ser. No. 16/131,456, filed on Sep. 14, 2018; which is a CIP of patent application Ser. No. 16/023,449, filed on Jun. 29, 2018. This present patent application draws priority from the referenced patent applications. The entire disclosure of the referenced patent applications is considered part of the disclosure of the present application and is hereby incorporated by reference herein in its entirety.
Number | Date | Country | |
---|---|---|---|
Parent | 16023449 | Jun 2018 | US |
Child | 17128141 | US |
Number | Date | Country | |
---|---|---|---|
Parent | 17128141 | Dec 2020 | US |
Child | 17203943 | US | |
Parent | 16131456 | Sep 2018 | US |
Child | 16023449 | US | |
Parent | 16023449 | Jun 2018 | US |
Child | 16131456 | US |