# US 10,309,768 B2 · Profile measuring method, profile measuring apparatus, and deformation detecting apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,309,768 B2 - Document ID: US10309768B2 - Status: Granted - Kind: B2 - Application number: 15/585,173 - Filed: 2017-05-03 - Published: 2018-06-14 - Granted: 2019-06-04 - Earliest claimed: 2016-12-13 - Assignees: Utechzone Co., Ltd. - Applicants: Utechzone Co., Ltd. - Inventors: Yueh-Long Lee; Po-Tsung Lin - Web page: https://patentgrep.com/patent/US10309768B2 ## CPC - G01B 11/2408: {for measuring roundness} - G01B 11/2433: {for measuring outlines by shadow casting} - G06T 7/62: of area, perimeter, diameter or volume - G06T 2207/30164: Workpiece; Machine component - G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL ## Abstract A profile measuring method used to measure a profile of an object-under-test includes the following steps. A light source, a light-transmissive projection film, and an image capturing device are provided, where the light-transmissive projection film is located between the light source and the image capturing device. The object-under-test is placed between the light source and the light-transmissive projection film, and a light beam is provided toward the light-transmissive projection film by the light source, to form an object-under-test projection of the object-under-test on the light-transmissive projection film. An image of the object-under-test projection is captured by the image capturing device, to obtain a projection size of the object-under-test projection. A measuring size of the object-under-test is calculated according to the projection size of the object-under-test projection. In addition, a profile measuring apparatus and a deformation detecting apparatus are also provided. ## Claims ### Claim 1 A profile measuring method, configured to measure a profile of an object-under-test, comprising: providing a light source, a light-transmissive projection film, and an image capturing device, wherein the light-transmissive projection film is located between the light source and the image capturing device; placing the object-under-test between the light source and the light-transmissive projection film, and providing a light beam toward the light-transmissive projection film by the light source to form an object-under-test projection on the light-transmissive projection film; capturing an image of the object-under-test projection by the image capturing device to obtain a projection size of the object-under-test projection; and calculating a measuring size of the object-under-test according to the projection size of the object-under-test projection. ### Claim 2 (depends on 1) The profile measuring method according to claim 1, wherein the step of calculating the measuring size of the object-under-test comprises: calculating the measuring size of the object-under-test according to the projection size of the object-under-test and an adjustment parameter. ### Claim 3 (depends on 2) The profile measuring method according to claim 2, wherein the adjustment parameter is obtained by means of the following steps, comprising: placing a standard object-under-test between the light source and the light-transmissive projection film, wherein the standard object-under-test has a standard size; providing the light beam toward the light-transmissive projection film by the light source to form a standard object-under-test objection on the light-transmissive projection film; capturing an image of the standard object-under-test projection by the image capturing device to obtain a projection size of the standard object-under-test projection; and comparing the standard size with the projection size of the standard object-under-test to obtain the adjustment parameter. ### Claim 4 (depends on 3) The profile measuring method according to claim 3, wherein the step of obtaining the standard size comprises: capturing an image of a scale by the image capturing device to obtain a size of one pixel of the image capturing device; and calculating the standard size according to a quantity of pixels corresponding to an image of the standard object-under-test projection captured by the image capturing device. ### Claim 5 (depends on 1) The profile measuring method according to claim 1, wherein the step of obtaining the projection size of the object-under-test projection comprises: capturing an image of a scale by the image capturing device, to obtain a size of one pixel of the image capturing device; and calculating the projection size of the object-under-test projection according to a quantity of pixels corresponding to an image of the object-under-test projection captured by the image capturing device. ### Claim 6 (depends on 1) The profile measuring method according to claim 1, comprising: analyzing a deformation degree of the object-under-test by an image analysis module according to the measuring size of the object-under-test. ### Claim 7 (depends on 5) The profile measuring method according to claim 5, wherein the object-under-test includes a ball-shaped object, and wherein the step of analyzing the deformation degree of the object-under-test includes analyzing roundness of the object-under-test according to the measuring size of the object-under-test. ### Claim 8 (depends on 1) The profile measuring method according to claim 1, comprising: driving the object-under-test to rotate by a driving unit when the light source provides the light beam. ### Claim 9 (depends on 7) The profile measuring method according to claim 7, wherein the step of driving the object-under-test to rotate comprises: driving the object-under-test to rotate around a rotating axis parallel to the light-transmissive projection film. ### Claim 10 (depends on 1) The profile measuring method according to claim 1, wherein the step of providing the light beam by the light source comprises: providing the light beam having directivity by the light source. ### Claim 11 A profile measuring device, configured to measure a profile of an object-under-test, comprising: a light source configured to provide a light beam toward the object-under-test; a light-transmissive projection film configured to form an object-under-test projection on a side of the light-transmissive projection film; a driving unit configured in an object-under-test placing area, and configured to drive the object-under-test; and an image capturing device located at another side of the light-transmissive projection film, and configured to capture an image of the object-under-test projection to obtain a projection size of the object-under-test projection, wherein at least one measuring size of the object-under-test is obtained though calculation according to the projection size of the object-under-test projection. ### Claim 12 (depends on 11) The profile measuring device according to claim 11, wherein the driving unit is configured to drive the object-under-test to rotate around a rotating axis parallel to the light-transmissive projection film. ### Claim 13 (depends on 11) The profile measuring device according to claim 11, wherein the driving unit comprises multiple scroll wheels, and the scroll wheels are configured to carry the object-under-test and rotate, to drive the object-under-test to rotate. ### Claim 14 (depends on 11) The profile measuring device according to claim 11, wherein the light source is configured to provide the light beam having directivity. ### Claim 15 A deformation detecting apparatus, comprising: a light-transmissive projection film; a light source, wherein an object-under-test placing area is located between the light source and the light-transmissive projection film, the object-under-test placing area is used to place an object-under-test, and the light source is configured to provide a light beam toward the light-transmissive projection film, to form an object-under-test projection of the object-under-test on the light-transmissive projection film; and an image capturing device, wherein the light-transmissive projection film is located between the light source and the image capturing device, and the image capturing device is configured to capture an image of the object-under-test projection, to obtain at least one size of the object-under-test projection; and an image analysis module, wherein at least one size of the object-under-test is obtained though calculation according to the size of the object-under-test projection, and the image analysis module is configured to analyze a deformation degree of the object-under-test according to the size of the object-under-test. ### Claim 16 (depends on 15) The deformation detecting apparatus according to claim 15, wherein the object-under-test is a ball-shaped object, and the image analysis module is configured to analyze roundness of the object-under-test according to the size of the object-under-test. ### Claim 17 (depends on 15) The deformation detecting apparatus according to claim 15, wherein the profile measuring device comprises a driving unit, and the driving unit is configured in the object-under-test placing area and is configured to drive the object-under-test to rotate. ### Claim 18 (depends on 17) The deformation detecting apparatus according to claim 17, wherein the driving unit is configured to drive the object-under-test to rotate around a rotating axis parallel to the light-transmissive projection film. ### Claim 19 (depends on 17) The deformation detecting apparatus according to claim 17, wherein the driving unit comprises multiple scroll wheels, and the scroll wheels are configured to carry the object-under-test and rotate, to drive the object-under-test to rotate. ### Claim 20 (depends on 15) The deformation detecting apparatus according to claim 15, wherein the light source is configured to provide the light beam having directivity.