CN113670722A - Method for detecting tensile strength performance of metal - Google Patents
Method for detecting tensile strength performance of metal Download PDFInfo
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- CN113670722A CN113670722A CN202110960844.0A CN202110960844A CN113670722A CN 113670722 A CN113670722 A CN 113670722A CN 202110960844 A CN202110960844 A CN 202110960844A CN 113670722 A CN113670722 A CN 113670722A
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- 239000002184 metal Substances 0.000 title claims abstract description 54
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 37
- 239000007769 metal material Substances 0.000 claims abstract description 23
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 abstract description 7
- 238000012360 testing method Methods 0.000 abstract description 7
- 238000012827 research and development Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 abstract description 2
- 238000012797 qualification Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 5
- 239000000956 alloy Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000004148 unit process Methods 0.000 description 2
- 238000012800 visualization Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/066—Special adaptations of indicating or recording means with electrical indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0012—Constant speed test
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0617—Electrical or magnetic indicating, recording or sensing means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
- G01N2203/0647—Image analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
Abstract
The invention discloses a method for detecting the tensile strength performance of metal, which comprises an image acquisition unit, wherein the image acquisition unit can acquire an image of a metal material, the image acquisition unit is connected with a processing unit, the processing unit can process the image according to an algorithm, the processing unit is also connected with an angle sensor and a distance measuring sensor, the processing unit can obtain the distance and the angle between the metal material and the image acquisition unit through the angle sensor and the distance measuring sensor, and the processing unit is utilized to obtain the tensile strength of the metal. Through the image acquisition unit and utilize the calculation to handle, utilize angle sensor and range sensor to carry out the measurement of data simultaneously to total calculation obtains the tensile strength of metal specimen, can obtain the test data of different materials, conveniently carries out abundant experiment to the qualification rate of sample, provides powerful logistics support for the research and development of metal.
Description
Technical Field
The invention relates to the field of metal performance testing, in particular to a method for detecting tensile strength performance of metal.
Background
The metal is very common in daily life, but most of the commonly used metals are alloy materials, and the components in the alloy are different according to actual requirements. In particular, the requirement for high-performance and high-strength metal materials requires the development of metal materials with different properties.
However, for a metal material which is developed daily, the performance of the metal material needs to be detected, particularly, the tensile resistance of the metal needs to be tested, most of the existing testing methods obtain a stress-strain curve, and the performance of the metal is obtained through the stress-strain curve.
Therefore, the inventor of the present invention aims to invent a method for detecting tensile strength of metal in view of the above technical problems.
Disclosure of Invention
In order to overcome the defects, the invention aims to provide a method for detecting the tensile strength performance of metal.
In order to achieve the above purposes, the invention adopts the technical scheme that: the detection method for the tensile strength performance of the metal comprises an image acquisition unit, wherein the image acquisition unit can acquire images of the metal material, the image acquisition unit is connected with a processing unit, the processing unit can process the images according to an algorithm, the processing unit is further connected with an angle sensor and a distance measuring sensor, the processing unit can obtain the distance and the angle between the metal material and the image acquisition unit through the angle sensor and the distance measuring sensor, and the processing unit is utilized to obtain the tensile strength of the metal.
The tensile strength of general metal is that the metal is vertically placed, the angle is measured by an angle sensor, the distance is measured by a distance measuring sensor, and then a trigonometric function is utilized, if the horizontal distance b, the inclination angle theta, the vertical distance a of the workpiece, and a-b tan theta are measured, the vertical distance of the workpiece is obtained, obtaining different a through the change of the angle, calculating the stretching amount of the metal through the a at different moments, evaluating whether the metal is qualified or not through the stretching amount, moreover, the calculation of the stretching amount is high in stage, for example, whether the stretching amount is qualified under a certain tension, but when the stretching amount is qualified under a certain tension and a certain time, long-time monitoring is needed, which is difficult to be completed by manpower, therefore, the image acquisition unit is matched, the digital speckle algorithm is utilized to realize the processing of the image, and the measurement of the tensile strength can be realized by utilizing the position change of the pixel points of the image.
Preferably, the image acquisition unit includes the CCD camera, just the CCD camera sets up on the camera cloud platform, through the shooting angle of CCD camera can be adjusted to the camera cloud platform, the camera cloud platform adopts electronic cloud platform, just the camera cloud platform can be connected with the processing unit, just the processing unit can control the work of camera cloud platform. Namely, the processing unit processes the image according to the algorithm, and when the image is not clear or partially not clear, the camera pan-tilt is timely adjusted to obtain clear patterns, and the image is analyzed.
Preferably, the algorithm is a digital speckle algorithm, the processing unit can divide and select the sub-region with the speckle characteristics on the image, compare the sub-region with other images, and obtain displacement values of the sub-region with the speckle characteristics at different times by using the digital speckle algorithm to obtain displacement information of the surface of the workpiece. The method comprises the steps of selecting a sub-area through a spot (characteristic point), simultaneously identifying other images to obtain information of the characteristic point in the images in different time periods, and calculating a displacement value through pixel displacement, an angle obtained by an angle sensor and data obtained by a distance measuring sensor to obtain the performance of the metal material in a stretching state.
Preferably, the processing unit is further connected with a computer, displays the information through a display screen, and inputs the information through a mouse and a keyboard. The visualization degree of the detection system is increased, and the tester can conveniently export data according to the measured data.
Preferably, the metal material is arranged through a support, the support is arranged on a machine table, the metal material is clamped on the support, a tension machine is further arranged on the machine table, and the tension machine can apply tension to the metal material. The force given to the metal sample by the tension machine can be gradually increased or constant, if the force is gradually changed, the maximum stress during fracture can be clearly obtained along with the change of the tension, and the frame number of the CCD camera can be controlled at the moment of fracture to obtain a clearer fracture picture; however, if the metal sample is constant and the constant force acts on the metal sample, the deformation of the metal sample is gradual and slow, and the metal sample cannot be observed by people for a long time.
Preferably, the distance measuring sensor is one of a laser distance measuring sensor and an ultrasonic distance measuring sensor.
The method for detecting the tensile strength performance of the metal has the advantages that the image acquisition unit is used for processing by using a calculator, the angle sensor and the distance measuring sensor are used for measuring data, the total calculation is carried out, the tensile strength of the metal sample is obtained, test data of different materials can be obtained, the qualified rate of the sample can be conveniently and fully tested, and powerful logistics guarantee is provided for the research and development of the metal.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and unequivocally define the scope of the present invention.
The method for detecting the tensile strength performance of the metal in the embodiment comprises an image acquisition unit, wherein the image acquisition unit can acquire an image of the metal material, the image acquisition unit is connected with a processing unit, the processing unit can process the image according to an algorithm, the processing unit is further connected with an angle sensor and a distance measuring sensor, the processing unit can obtain the distance and the angle between the metal material and the image acquisition unit through the angle sensor and the distance measuring sensor, and the processing unit is utilized to obtain the tensile strength of the metal.
The tensile strength of general metal is that the metal is vertically placed, the angle is measured by an angle sensor, the distance is measured by a distance measuring sensor, and then a trigonometric function is utilized, if the horizontal distance b, the inclination angle theta, the vertical distance a of the workpiece, and a-b tan theta are measured, the vertical distance of the workpiece is obtained, obtaining different a through the change of the angle, calculating the stretching amount of the metal through the a at different moments, evaluating whether the metal is qualified or not through the stretching amount, moreover, the calculation of the stretching amount is high in stage, for example, whether the stretching amount is qualified under a certain tension, but when the stretching amount is qualified under a certain tension and a certain time, long-time monitoring is needed, which is difficult to be completed by manpower, therefore, the image acquisition unit is matched, the digital speckle algorithm is utilized to realize the processing of the image, and the measurement of the tensile strength can be realized by utilizing the position change of the pixel points of the image.
The image acquisition unit comprises a CCD camera, the CCD camera is arranged on a camera pan-tilt, the shooting angle of the CCD camera can be adjusted through the camera pan-tilt, the camera pan-tilt adopts an electric pan-tilt, the camera pan-tilt can be connected with the processing unit, and the processing unit can control the camera pan-tilt to work. Namely, the processing unit processes the image according to the algorithm, and when the image is not clear or partially not clear, the camera pan-tilt is timely adjusted to obtain clear patterns, and the image is analyzed.
The algorithm is a digital speckle algorithm, the processing unit can divide and select sub-regions with speckle characteristics on the image, compare the sub-regions with the other images, and obtain displacement values of the sub-regions with the speckle characteristics at different times by using the digital speckle algorithm to obtain displacement information of the surface of the workpiece. The method comprises the steps of selecting a sub-area through a spot (characteristic point), simultaneously identifying other images to obtain information of the characteristic point in the images in different time periods, and calculating a displacement value through pixel displacement, an angle obtained by an angle sensor and data obtained by a distance measuring sensor to obtain the performance of the metal material in a stretching state.
The processing unit is also connected with a computer, displays through a display screen, and inputs through a mouse and a keyboard. The visualization degree of the detection system is increased, and the tester can conveniently export data according to the measured data.
The metal material passes through the support setting, and the support setting is on the board to carry out centre gripping metal material on the support, and still set up the pulling force machine on the board, the pulling force machine can exert pulling force to metal material. The force given to the metal sample by the tension machine can be gradually increased or constant, if the force is gradually changed, the maximum stress during fracture can be clearly obtained along with the change of the tension, and the frame number of the CCD camera can be controlled at the moment of fracture to obtain a clearer fracture picture; however, if the metal sample is constant and the constant force acts on the metal sample, the deformation of the metal sample is gradual and slow, and the metal sample cannot be observed by people for a long time.
And a plurality of mark points can be arranged on the bracket. The distance measuring sensor is one of a laser distance measuring sensor and an ultrasonic distance measuring sensor.
The detection method for the tensile strength performance of the metal has the advantages that the detection method is processed through the image acquisition unit and by using the calculator, meanwhile, the angle sensor and the distance measuring sensor are used for measuring data, the total calculation is carried out, the tensile strength of the metal sample is obtained, test data made of different materials can be obtained, sufficient experiments can be conveniently carried out on the qualified rate of the sample, and powerful logistics guarantee is provided for the research and development of the metal.
The test principle is as follows: the image acquisition unit acquires images in real time, evaluates the clearness of the images according to an image clearness algorithm, and utilizes the camera pan-tilt to adjust the angle to obtain clear images, thereby facilitating the calculation of the subsequent digital speckle algorithm.
The angle sensor and the distance measuring sensor can measure an angle theta and a linear distance a between a testing part and a metal sample to be tested, the other right-angle side is b, the bevel side is c, one side and the angle theta are known, the lengths of b and c can be obtained by utilizing a trigonometric function, the length of b changes along with the change of the stretching amount, the stretching strength performance of the metal is finally obtained, meanwhile, images are shot in real time, the change relation of the stretching amount in continuous time can be obtained by utilizing a digital speckle algorithm, the stretching resistance of the metal to be tested is comprehensively obtained, the performance of the metal to be tested can be comprehensively evaluated, and visual data support is provided for the research and development of the metal.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the present invention is not limited thereto, and any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (6)
1. A method for detecting the tensile strength performance of metal is characterized by comprising the following steps: the device comprises an image acquisition unit, the image acquisition unit can acquire images of metal materials, the image acquisition unit is connected with a processing unit, the processing unit can process the images according to an algorithm, the processing unit is further connected with an angle sensor and a distance measuring sensor, the processing unit can obtain the distance and the angle between the metal materials and the image acquisition unit through the angle sensor and the distance measuring sensor, and the processing unit is utilized to obtain the tensile strength of the metal.
2. The method for detecting the tensile strength performance of the metal according to claim 1, wherein the method comprises the following steps: the image acquisition unit comprises a CCD camera, the CCD camera is arranged on a camera pan-tilt, the shooting angle of the CCD camera can be adjusted by the camera pan-tilt, the camera pan-tilt adopts an electric pan-tilt, the camera pan-tilt can be connected with the processing unit, and the processing unit can control the camera pan-tilt to work.
3. The method for detecting the tensile strength performance of the metal according to claim 1, wherein the method comprises the following steps: the algorithm is a digital speckle algorithm, the processing unit can divide and select sub-regions with speckle characteristics on the image, compare the sub-regions with the other images, and obtain displacement values of the sub-regions with the speckle characteristics at different times by using the digital speckle algorithm to obtain displacement information of the surface of the workpiece.
4. The method for detecting the tensile strength performance of the metal according to claim 1, wherein the method comprises the following steps: the processing unit is also connected with a computer, displays through a display screen, and inputs through a mouse and a keyboard.
5. The method for detecting the tensile strength performance of the metal according to claim 1, wherein the method comprises the following steps: the metal material passes through the support setting, the support sets up on the board to carry out centre gripping metal material on the support, and still set up the pulling force machine on the board, the pulling force machine can exert pulling force to metal material.
6. The method for detecting the tensile strength performance of the metal according to claim 1, wherein the method comprises the following steps: the distance measuring sensor is one of a laser distance measuring sensor and an ultrasonic distance measuring sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110960844.0A CN113670722A (en) | 2021-08-20 | 2021-08-20 | Method for detecting tensile strength performance of metal |
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| CN202110960844.0A CN113670722A (en) | 2021-08-20 | 2021-08-20 | Method for detecting tensile strength performance of metal |
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| CN113670722A true CN113670722A (en) | 2021-11-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116213291A (en) * | 2023-05-06 | 2023-06-06 | 深圳市百思泰科技有限公司 | Spanner blank detection device and detection method thereof |
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| US20200249138A1 (en) * | 2017-10-16 | 2020-08-06 | Imprintec GmbH | Device and Method for Automatic Workpiece Inspection |
| CN213516320U (en) * | 2020-12-15 | 2021-06-22 | 苏州中科计量技术有限公司 | Mechanical precision calibration test equipment |
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2021
- 2021-08-20 CN CN202110960844.0A patent/CN113670722A/en active Pending
Patent Citations (5)
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| US20200249138A1 (en) * | 2017-10-16 | 2020-08-06 | Imprintec GmbH | Device and Method for Automatic Workpiece Inspection |
| CN108489692A (en) * | 2018-03-14 | 2018-09-04 | 江苏省特种设备安全监督检验研究院 | A kind of measurement method and device of crane Static stiffness |
| CN208043364U (en) * | 2018-03-14 | 2018-11-02 | 江苏省特种设备安全监督检验研究院 | A kind of crane girder Static stiffness detector |
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| CN116213291A (en) * | 2023-05-06 | 2023-06-06 | 深圳市百思泰科技有限公司 | Spanner blank detection device and detection method thereof |
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