Method and system for ultrasonically detecting nonuniformity of internal components of transparent glass

Abstract

The invention discloses a method and system for detecting nonuniformity of internal components of transparent glass by adopting ultrasound, and the method comprises the following steps: S1, obtaining sound waves reflected or penetrated back from the interior of the glass, and forming ultrasonic imaging data of large-area glass; s2, according to the ultrasonic imaging data, obtaining a component non-uniform region in the glass; s3, quantitative analysis and quality evaluation are carried out on the non-uniform component area in the glass, by means of the technical scheme, efficient and accurate detection of the non-uniformity of the components in the large-area transparent glass can be achieved, and the level of material detection and quality control is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of glass detection, and in particular relates to a method and system for detecting uneven internal components of transparent glass by using ultrasound. Background Art

[0002] With the continuous innovation and development of technology, the performance of my country's flat glass has been continuously expanded and improved. It has been used more and more widely in high-tech fields and major strategic demand fields such as electronic information, encrypted storage, and high-end equipment manufacturing, and the requirements for the internal uniformity of glass are also constantly increasing. At present, there are two methods that can be used to detect the uneven composition of glass: density comparison method and streak detection method. Among them, the density detection method is to select a small piece of glass and compare the density with the standard sample for detection, so it is not possible to obtain a large-area uniformity detection of the complete glass strip; the streak detection method is to use the refractive index change of light to convert it into an image for detection. Although this method can be used for large-area detection and has high accuracy, it has strict requirements on the detection space environment. Under different external lighting conditions or different temperature and humidity conditions, the refractive index of the light source in the medium will have a large difference, which brings many uncertainties to the accuracy of the detection. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a method and system for detecting the uneven composition inside transparent glass by using ultrasound.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] A method for detecting uneven internal components of transparent glass using ultrasound, comprising:

[0006] Step S1, obtaining sound waves reflected or penetrated from the inside of the glass to form ultrasonic imaging data of a large area of ​​glass;

[0007] Step S2, obtaining the composition inhomogeneous region inside the glass according to the ultrasonic imaging data;

[0008] Step S3: quantitatively analyzing and evaluating the quality of the compositionally inhomogeneous region inside the glass.

[0009] Preferably, step S1 comprises:

[0010] Preset the scanning path of the ultrasonic transducer array to cover the entire glass surface;

[0011] The ultrasonic transducer array transmits ultrasonic waves at a preset frequency along the scanning path and receives the sound waves reflected from or penetrated through the inside of the glass;

[0012] The echo signal of each scanning point is recorded in real time to form ultrasonic imaging data of large-area glass.

[0013] Preferably, step S2 comprises:

[0014] Analyze the ultrasonic imaging data to extract key parameters, which are related to the density, elastic modulus and composition changes inside the glass;

[0015] Step 32, converting the two-dimensional scanning data into a three-dimensional structure diagram inside the glass;

[0016] Step 33: Based on the key parameters and according to the acoustic characteristics that form the contrast difference in the three-dimensional structure diagram inside the glass, the composition inhomogeneous areas that may exist inside the glass are identified.

[0017] Preferably, the key parameters include: sound velocity change and waveform attenuation.

[0018] The present invention also provides a system for ultrasonically detecting uneven composition inside transparent glass, comprising: an ultrasonic transducer array, a scanning and positioning system, a coupling medium, a glass sample fixing system and a data acquisition and processing system; wherein the coupling medium is applied between the ultrasonic transducer array and the glass surface; the scanning and positioning system is used to preset the scanning path of the ultrasonic transducer array to cover the entire glass surface; the glass sample fixing system is used to firmly fix the glass sample on the detection platform; the ultrasonic transducer array is used to obtain sound waves reflected or penetrated from the inside of the glass to form ultrasonic imaging data of a large area of ​​glass; the data acquisition and processing system is used to obtain the uneven composition area inside the glass based on the ultrasonic imaging data, and to perform quantitative analysis and quality evaluation on the uneven composition area inside the glass.

[0019] Preferably, the ultrasonic transducer array is used to transmit ultrasonic waves at a preset frequency along a scanning path, and receive sound waves reflected from or penetrating the inside of the glass, so as to form ultrasonic imaging data of a large area of ​​glass.

[0020] Preferably, the data acquisition and processing system is used to identify possible areas of compositional inhomogeneity inside the glass based on key parameters of the ultrasonic imaging data and acoustic characteristics that form contrast differences in the three-dimensional structure diagram inside the glass.

[0021] Preferably, the key parameters include: sound velocity change and waveform attenuation.

[0022] The present invention has the following technical effects:

[0023] 1. High-resolution detection: Ultrasonic imaging can detect micron-level component inhomogeneities, which is suitable for quality inspection of optical glass, architectural glass and electronic display glass with high precision requirements.

[0024] 2. Non-destructive testing: The testing process of this device is non-destructive and will not damage the glass itself. It is suitable for full-size non-destructive testing of large-area glass.

[0025] 3. Large area scanning: Through the automated scanning system, large areas of glass can be inspected, which is suitable for batch inspection and quality control in industrial-grade production.

[0026] The present invention can realize efficient and accurate detection of the internal component non-uniformity of large-area transparent glass, and improve the level of material detection and quality control. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0028] Figure 1 This is a flow chart of a method for ultrasonically detecting uneven internal composition of transparent glass according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Embodiment 1:

[0032] like Figure 1 As shown, an embodiment of the present invention provides a method for ultrasonically detecting uneven internal components of transparent glass, comprising:

[0033] Step 1: Work accurately

[0034] Select a large transparent glass sample of appropriate size, clean the surface to ensure it is dust-free and dirt-free to avoid affecting ultrasonic propagation; calibrate the ultrasonic transducer array to determine the optimal operating frequency and transmission power to ensure that tiny component inhomogeneities inside the glass can be detected; apply coupling agent to the area where the glass surface contacts the transducer array to ensure that sound waves can be effectively transmitted into the glass.

[0035] Step 2: Acquire the sound waves reflected or penetrated from the inside of the glass to form ultrasonic imaging data of large-area glass, including:

[0036] Step 21, using a computer system to preset a scanning path of the ultrasonic transducer array to cover the entire glass surface; the scanning may be performed point by point in a matrix form by plane scanning;

[0037] Step 22, the ultrasonic transducer array transmits ultrasonic waves at a preset frequency on the scanning path, and receives the sound waves reflected from or penetrating the inside of the glass; the uneven composition will affect the speed and attenuation of the sound waves, which is reflected as a change in the echo signal;

[0038] Step 23: Record the echo signal of each scanning point in real time to form ultrasonic imaging data of large-area glass.

[0039] Step 3: Obtain the compositionally inhomogeneous region inside the glass based on the ultrasonic imaging data, specifically including:

[0040] Step 31, analyzing the ultrasonic imaging data to extract key parameters (such as sound velocity change, waveform attenuation), which are associated with the density, elastic modulus and composition changes inside the glass;

[0041] Step 32: using an imaging algorithm (such as a tomography reconstruction algorithm) to convert the two-dimensional scanning data into a three-dimensional structure diagram inside the glass;

[0042] Step 33: Based on the key parameters and according to the acoustic characteristics that form the contrast difference in the three-dimensional structure diagram inside the glass, the composition inhomogeneous areas that may exist inside the glass are identified.

[0043] Step 4: Quantitatively analyze and evaluate the quality of the inhomogeneous composition areas inside the glass, including:

[0044] Quantitatively analyze the compositionally inhomogeneous regions inside the glass to obtain the distribution, shape and size of these regions in the glass;

[0045] Combined with the analysis of the physical properties of the material, the potential impact of these inhomogeneities on the strength and optical properties of the glass is evaluated to determine the overall quality of the glass material.

[0046] Embodiment 2:

[0047] The embodiment of the present invention also provides a system for detecting the uneven composition of the internal components of transparent glass by using ultrasound, comprising: an ultrasonic transducer array, a scanning and positioning system, a coupling medium, a glass sample fixing system and a data acquisition and processing system.

[0048] The ultrasonic transducer array uses a set of two-dimensional movable ultrasonic transducer arrays. The array includes multiple ultrasonic transmitters and receivers, which can synchronously transmit and receive signals at multiple points on a large area of ​​glass. The transducer operates in a high frequency range (usually between 5-20MHz) and can provide sufficient spatial resolution. In order to cope with glass of different thicknesses and materials, the transducer system should have adjustable ultrasonic frequency and emission intensity. Ultrasonic waves of different frequencies can penetrate different depths of glass and reflect compositional inhomogeneities.

[0049] The scanning and positioning system includes: a mechanical mobile platform, an automated control system, and a positioning sensor; the glass sample is fixed on a mechanical movable platform that can move accurately in three directions of the coordinate system. The transducer array can also move along the Z axis to adjust the distance to cope with glass of different thicknesses; the automated control system is used for the scanning platform, which is controlled by a computer and can perform grid scanning on the glass surface according to a preset path to ensure that the transducer array covers the entire glass area; the positioning sensor uses a high-precision displacement sensor to ensure that the scanning position of the transducer relative to the glass surface is accurate to avoid offset affecting the detection results.

[0050] The coupling medium is a liquid coupling agent. In order to ensure that the sound waves can be effectively transmitted to the inside of the glass, an appropriate amount of liquid coupling agent (such as water or special ultrasonic coupling glue) can be applied between the transducer and the glass surface to ensure that the transducer is in close contact with the glass and reduce the loss of sound wave reflection.

[0051] The glass sample fixing system uses mechanical clamps or vacuum adsorption systems to firmly fix the glass sample on the testing platform to ensure that the glass is stable and motionless during the testing process.

[0052] The data acquisition and processing system obtains ultrasonic echo signals through high-speed data acquisition cards and transmits them to the computer system in real time. Through signal processing algorithms (such as Fourier transform, beam forming, time-frequency analysis, etc.), the echo signals are processed into component difference maps; image reconstruction algorithms are used to generate three-dimensional imaging inside the glass to display areas with uneven composition.

[0053] Furthermore, the ultrasonic transducer array is used to obtain sound waves reflected or penetrated from the inside of the glass to form ultrasonic imaging data of a large area of ​​glass; the data acquisition and processing system is used to obtain the composition-inhomogeneous area inside the glass based on the ultrasonic imaging data; and to perform quantitative analysis and quality assessment on the composition-inhomogeneous area inside the glass.

[0054] Furthermore, the ultrasonic transducer array emits ultrasonic waves at a preset frequency along the scanning path and receives sound waves reflected or penetrated from the inside of the glass; uneven composition affects the speed and attenuation of the sound waves, which is reflected as changes in the echo signal; the echo signal of each scanning point is recorded in real time to form ultrasonic imaging data of large areas of glass.

[0055] Furthermore, the data acquisition and processing system is used to analyze the ultrasonic imaging data and extract key parameters (such as changes in sound velocity and waveform attenuation), which are associated with the density, elastic modulus and composition changes inside the glass; use imaging algorithms (such as tomography reconstruction algorithms) to convert the two-dimensional scanning data into a three-dimensional structure map inside the glass; based on the key parameters, according to the acoustic characteristics that form contrast differences in the three-dimensional structure map inside the glass, identify possible areas of compositional inhomogeneity inside the glass.

[0056] Furthermore, the data acquisition and processing system is used to perform quantitative analysis and quality assessment on the areas with uneven composition inside the glass, specifically including: quantitative analysis on the areas with uneven composition inside the glass to obtain the distribution, shape and size of these areas in the glass; combined with the analysis of the physical properties of the material, assess the potential impact of these inhomogeneities on the strength, optical properties, etc. of the glass, and judge the overall quality of the glass material.

[0057] The embodiments described above are only descriptions of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for detecting the uneven composition of transparent glass by ultrasonic detection, characterized in that: include: Step S1, obtaining sound waves reflected or penetrated from the inside of the glass to form ultrasonic imaging data of a large area of ​​glass; Step S2, obtaining the composition inhomogeneous region inside the glass according to the ultrasonic imaging data; Step S3: quantitatively analyzing and evaluating the quality of the compositionally inhomogeneous region inside the glass.

2. The method for detecting the uneven composition of the interior of transparent glass by using ultrasound according to claim 1, characterized in that: Step S1 includes: Preset the scanning path of the ultrasonic transducer array to cover the entire glass surface; The ultrasonic transducer array transmits ultrasonic waves at a preset frequency along the scanning path and receives the sound waves reflected from or penetrated through the inside of the glass; The echo signal of each scanning point is recorded in real time to form ultrasonic imaging data of large-area glass.

3. The method for detecting the uneven composition of the interior of transparent glass by using ultrasound according to claim 2, characterized in that: Step S2 includes: Analyze the ultrasonic imaging data to extract key parameters, which are related to the density, elastic modulus and composition changes inside the glass; Step 32, converting the two-dimensional scanning data into a three-dimensional structure diagram inside the glass; Step 33: Based on the key parameters and according to the acoustic characteristics that form the contrast difference in the three-dimensional structure diagram inside the glass, the composition inhomogeneous areas that may exist inside the glass are identified.

4. The method for detecting the uneven composition of the interior of transparent glass by using ultrasound according to claim 3, characterized in that: Key parameters include: sound velocity change and waveform attenuation.

5. A system for detecting uneven internal components of transparent glass using ultrasound, characterized in that: include: Ultrasonic transducer array, scanning and positioning system, coupling medium, glass sample fixing system and data acquisition and processing system; wherein, coupling medium is applied between the ultrasonic transducer array and the glass surface; the scanning and positioning system is used to preset the scanning path of the ultrasonic transducer array to cover the entire glass surface; the glass sample fixing system is used to firmly fix the glass sample on the detection platform; the ultrasonic transducer array is used to obtain the sound waves reflected or penetrated from the inside of the glass to form ultrasonic imaging data of a large area of ​​glass; the data acquisition and processing system is used to obtain the composition inhomogeneous area inside the glass based on the ultrasonic imaging data, and to perform quantitative analysis and quality evaluation on the composition inhomogeneous area inside the glass.

6. The system for detecting uneven internal composition of transparent glass using ultrasound as claimed in claim 5, characterized in that: The ultrasonic transducer array is used to transmit ultrasonic waves at a preset frequency along the scanning path and receive sound waves reflected or penetrated from the inside of the glass to form ultrasonic imaging data of a large area of ​​glass.

7. The system for detecting the uneven composition of the interior of transparent glass by using ultrasound according to claim 6, characterized in that: The data acquisition and processing system is used to identify possible areas of compositional inhomogeneity inside the glass based on key parameters of the ultrasonic imaging data and the acoustic characteristics that form contrast differences in the three-dimensional structure map inside the glass.

8. The system for detecting the uneven composition of the interior of transparent glass by using ultrasound according to claim 7, characterized in that: Key parameters include: sound velocity change and waveform attenuation.

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