Non-contact tension ring sizing device and method

Abstract

The present application relates to petrochemical instrument measurement technical field, especially a kind of non-contact tension ring size measuring device and method, device includes dark box, light source and slit and scale slide rail, cooperate vertical horizontal hanging rod and adjustable hanging line, horizontal movable tension ring clamp and movable coordinate paper clamp, form the projection of tension ring on coordinate paper.By similar triangle relationship, get the actual diameter of tension ring;Through the difference of multi-axis projection diameter, the roundness is evaluated.The scheme is simple in structure, low in cost, accurate in measurement, and can replace expensive image instrument for non-contact measurement of platinum ring outer diameter.

Description

Technical Field

[0001] This invention relates to the field of petrochemical instrument measurement technology, and in particular to a non-contact tension ring size measurement device and method. Background Technology

[0002] The surface tension value reflects the physicochemical properties and composition of a liquid, and is one of the important indicators for evaluating product quality in many materials, engineering, and other fields. The most widely used instrument for measuring surface tension is the interfacial tensiometer, which consists of a tension measuring device, a test platform, a controllable moving device, and a tension ring (platinum ring) or platinum plate. This instrument is widely used in industries such as power, petroleum, and chemicals. The platinum ring method is particularly prevalent. Its measurement principle involves zeroing the tension measuring device connected to the platinum ring and gently immersing it in the liquid. Then, the platinum ring is slowly raised, causing the liquid level to drop relatively and eventually separate from the platinum ring. The highest value measured during this process is the surface tension value. Therefore, the platinum ring is a crucial component. It is made of high-purity platinum wire, and there are strict standards for the diameter of the platinum wire and the circumference of the platinum ring. Therefore, it is necessary to measure the diameter of the platinum wire and the outer diameter of the platinum ring. The measurement of the outer diameter of the platinum ring is usually done using non-contact methods, such as using a video measuring instrument, but video measuring instruments are very expensive.

[0003] Therefore, there is an urgent need to develop a non-contact tension ring size measurement device and method to solve the above problems. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a non-contact tension ring size measurement device and method.

[0005] A non-contact tension ring size measuring device, comprising at least one of a vertical structure or a horizontal structure, characterized in that:

[0006] The vertical structure includes a vertically placed dark box, with a light source and a slit at the top of the dark box. A slide rail is vertically placed on one side inside the dark box, and a horizontal hanging rod is placed on one side above the slide rail. A tension ring is suspended at the bottom of the horizontal hanging rod by an adjustable hanging line. A movable position indicator clip for aligning the tension ring is also provided on the slide rail. Graph paper is placed on the base inside the dark box.

[0007] The horizontal structure includes a dark box placed horizontally. A light source and a slit are provided on one side of the dark box. A slide rail is provided at the bottom of the dark box. A movable tension ring clamp and a movable coordinate paper clamp are slidably connected on the slide rail. The movable tension ring clamp holds a tension ring, and the movable coordinate paper clamp holds coordinate paper.

[0008] Furthermore, in order to better realize the present invention, the slide rail is provided with a scale on its side; the light source and the slit diameter are 5-10mm.

[0009] A method for measuring the dimensions of a vertical non-contact tension ring includes the following steps:

[0010] S1, keep the tension ring and measuring device at a constant temperature of 20°C for more than 4 hours;

[0011] S2, turn on the light source and fix the coordinate paper in the center of the base;

[0012] S3, attach an adjustable hanging line to the tension ring and suspend it on a horizontal hanging rod. Adjust the length of the adjustable hanging line to make the tension ring at a suitable height. The specific height is determined by the clarity and diameter of the tension ring projection on the coordinate paper. Stabilize the tension ring so that it is vertical and stationary.

[0013] S4. Adjust the movable position indicator clip on the slide rail bracket so that it is on the same horizontal line as the lowest ring of the tension ring.

[0014] S5, read the height h of the movable position indicator clamped on the slide rail bracket. The height H from the light source to the coordinate paper on the base is a fixed value;

[0015] S6. Based on the projection on the coordinate paper, read the projected diameter D of the tension rings with different axial directions, and mark the circumference on the coordinate paper with a pen.

[0016] S7. Read the diameter of different axes according to the marked circumference, and make a simple judgment on the roundness of the tension ring by the diameter of different axes;

[0017] S8. Based on the principle of similar triangles, calculate the diameter d of the tension ring. The calculation formula is: ; Calculate d using D along different axes and take the average value;

[0018] S9. To ensure accurate measurement, the tension ring height h2 can be adjusted again according to S3 to obtain a new projected diameter D2. Repeat steps 3 to 8 to obtain d2.

[0019] S10, tension ring at different heights d i The calculated average value is the actual diameter d of the tension ring.

[0020] A method for measuring the dimensions of a horizontal non-contact tension ring includes the following steps:

[0021] S1, keep the tension ring and measuring device at a constant temperature of 20°C for more than 4 hours;

[0022] S2, turn on the light source and fix the coordinate paper in the center of the movable coordinate paper holder;

[0023] S3. Clamp the tension ring metal rod at an angle parallel to the optical path onto the movable tension ring fixture. Adjust the position of the movable tension ring fixture on the slide rail to place the tension ring in a suitable position. The specific position is determined by the clarity and diameter of the tension ring projection on the coordinate paper.

[0024] S4, Read the position of the movable tension ring clamp. l The length from the light source to the graph paper is L;

[0025] S5. Based on the projection on the coordinate paper, read the projected diameter D of the tension ring and mark the circumference on the coordinate paper with a pen.

[0026] S6. Read the diameter of different axes according to the marked circumference, and judge the roundness of the tension ring by the diameter of different axes;

[0027] S7. Based on the principle of similar triangles, calculate the diameter d of the tension ring. The calculation formula is: ; Calculate d using D along different axes and take the average value;

[0028] S8, to ensure measurement accuracy, the distance between the tension ring and the light source can be adjusted again according to S3. l 2 To obtain the new projected diameter D 2. Repeat steps 3-7 to obtain... d 2;

[0029] S9, tension ring at different heights d i The calculated average value is the actual diameter d of the tension ring.

[0030] The beneficial effects of this invention are as follows:

[0031] This invention can determine the roundness of a tension ring and accurately measure its diameter in a non-contact manner. The measuring device has a simple structure and a clear principle, avoiding the high investment required for expensive instruments such as imaging devices. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the vertical structure of the non-contact tension ring size measuring device of the present invention;

[0033] Figure 2 This is a schematic diagram of the horizontal structure of the non-contact tension ring size measuring device of the present invention.

[0034] Figure 3 This is a schematic diagram of the reading geometry of the vertical structure of the non-contact tension ring size measuring device of the present invention;

[0035] Figure 4 This is a schematic diagram of the reading geometry of the horizontal structure of the non-contact tension ring size measuring device of the present invention.

[0036] In the picture,

[0037] 1. Dark box, 2. Horizontal hanging rod, 3. Adjustable hanging line, 4. Graph paper, 5. Base, 6. Movable position indicator clamp, 7. Slide rail, 8. Light source and slit, 9. Movable tension ring clamp, 10. Movable graph paper clamp. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0040] Figure 1 Figure 3 This is a first specific embodiment of the present invention, which is a measurement method for a vertical non-contact tension ring size measuring device:

[0041] 1. Incubate the tension ring and measuring device in a constant temperature chamber at 20°C for at least 4 hours.

[0042] 2. Turn on the light source and fix the coordinate paper in the center of the base.

[0043] 3. Attach an adjustable hanging line to the tension ring and suspend it on a horizontal hook. Adjust the length of the adjustable hanging line to bring the tension ring to a suitable height. The specific height is determined by the clarity and diameter of the tension ring projection on the graph paper. Stabilize the tension ring so that it is vertical and stationary.

[0044] 4. Adjust the movable position indicator clip on the slide rail bracket so that it is on the same horizontal line as the lowest ring of the tension ring.

[0045] 5. Read the position height of the movable position indicator clamped on the slide rail bracket. h The distance is 123 mm. The height from the light source to the graph paper on the base is a fixed value. H It is 394 mm.

[0046] 6. Based on the projection on the graph paper, read the projected diameters of the tension rings with different axial directions as 63 mm, 62 mm, 63 mm, and 62.5 mm, and mark the circumference on the graph paper with a pen.

[0047] 7. Read the diameter of different axes according to the marked circumference. The roundness of the tension ring can be easily judged by the diameter of different axes. The maximum diameter is 63 mm, the minimum diameter is 62 mm, and the roundness error is 1 mm.

[0048] 8. Calculate the diameter of the tension ring based on the principle of similar triangles. d The calculation formula is: Through different axes D calculate d The values ​​were 19.668 mm, 19.355 mm, 19.668 mm, and 19.511 mm, respectively, and the average value was taken. d It is 19.551 mm.

[0049] 9. To ensure accurate measurement, the tension ring height can be adjusted again according to step 3. h 2 is 169 mm, thus obtaining the new average projected diameter. D 2 is 45 mm, repeat steps 3-8 to obtain d 2 is 19.731 mm.

[0050] 10. Tension ring at different heights d i The calculated average value is the actual diameter of the tension ring. d It is 19.641mm.

[0051] 11. Verify the actual tension ring measurement using an imaging device. d The value is 19.738 mm. The measurement error between the measuring device and the image instrument is -0.097 mm.

[0052] The second specific embodiment of the vertical structure is as follows:

[0053] 1. Incubate the tension ring and measuring device in a constant temperature chamber at 20°C for at least 4 hours.

[0054] 2. Turn on the light source and fix the coordinate paper in the center of the base.

[0055] 3. Attach an adjustable hanging line to the tension ring and suspend it on a horizontal hook. Adjust the length of the adjustable hanging line to bring the tension ring to a suitable height. The specific height is determined by the clarity and diameter of the tension ring projection on the graph paper. Stabilize the tension ring so that it is vertical and stationary.

[0056] 4. Adjust the movable position indicator clip on the slide rail bracket so that it is on the same horizontal line as the lowest ring of the tension ring.

[0057] 5. Read the position height of the movable position indicator clamped on the slide rail bracket. hThe distance is 212 mm. The height from the light source to the graph paper on the base is a fixed value. H It is 394 mm.

[0058] 6. Based on the projection on the graph paper, read the projected diameters of the different axial tension rings as 36.5 mm, 37 mm, 36 mm, and 37 mm, and mark the circumference on the graph paper with a pen.

[0059] 7. Read the diameter of different axes according to the marked circumference. The roundness of the tension ring can be easily judged by the diameter of different axes. The maximum diameter is 37.5 mm, the minimum diameter is 36 mm, and the roundness error is 1.5 mm.

[0060] 8. Calculate the diameter of the tension ring based on the principle of similar triangles. d The calculation formula is: Through different axes D calculate d The values ​​were 19.640 mm, 19.909 mm, 19.371 mm, and 19.909 mm, respectively, and the average value was taken. d It is 19.707 mm.

[0061] 9. To ensure accurate measurement, the tension ring height can be adjusted again according to step 3. h 2 is 118 mm, thus obtaining a new average projected diameter. D 2 is 65.6 mm, repeat steps 3-8 to obtain d 2 is 19.647 mm.

[0062] 10. Tension ring at different heights d i The calculated average value is the actual diameter of the tension ring. d It measures 19.677 mm.

[0063] 11. Verify the actual tension ring measurement using an imaging device. d The value is 19.738 mm. The measurement error between the measuring device and the image instrument is -0.061 mm.

[0064] Figure 2 Figure 4 This is the third specific embodiment of the present invention, which is a measurement method for a vertical non-contact tension ring size measuring device:

[0065] 1. Incubate the tension ring and measuring device in a constant temperature chamber at 20°C for at least 4 hours.

[0066] 2. Turn on the light source and fix the coordinate paper in the center of the movable coordinate paper holder.

[0067] 3. Clamp the tension ring metal rod at an angle parallel to the optical path onto the movable tension ring fixture. Adjust the position of the movable tension ring fixture on the slide rail to place the tension ring in a suitable position. The specific position is determined by the clarity and diameter of the tension ring projection on the coordinate paper.

[0068] 4. Read the position of the movable tension ring clamp. l It is 203 mm. The length from the light source to the graph paper. L It is 400 mm.

[0069] 5. Read the projected diameter of the tension ring based on the projection on the graph paper. D Use a pen to mark the circumference on the graph paper.

[0070] 6. According to the marked circumference, the diameters of different axes are 39 mm, 38.5 mm, 38.5 mm, and 39 mm. The roundness of the tension ring is judged by the diameters of different axes. The maximum value is 39 mm, the minimum value is 38.5 mm, and the roundness error is 0.5 mm.

[0071] 7. Calculate the diameter of the tension ring based on the principle of similar triangles. d The principle is shown in the diagram below. The calculation formula is: Through different axes D calculate d The values ​​are 19.793 mm, 19.539 mm, 19.539 mm, and 19.793 mm, respectively, with an average value of 19.666 mm.

[0072] 8. To ensure accurate measurement, the distance between the tension ring and the light source can be adjusted again according to the steps. l 2 is 165 mm, thus obtaining the new average projected diameter. D 2 is 47.9 mm, repeat steps 3-7 to obtain d 2 is 19.759 mm.

[0073] 9. Tension ring in different positions d i The calculated average value is the actual diameter of the tension ring. d It is 19.712mm.

[0074] 10. Verify the actual tension ring measurement using an imaging device. d The value is 19.738 mm. The measurement error between the measuring device and the image instrument is -0.026 mm.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A measurement method for a vertical non-contact tension ring size measuring device, wherein the vertical structure includes a vertically placed dark box (1), a light source and a slit (8) are provided on the top of the dark box (1), a slide rail (7) is vertically erected on one side inside the dark box (1), a horizontal hanging rod (2) is provided on one side above the slide rail (7), the tension ring is suspended at the bottom of the horizontal hanging rod (2) by an adjustable hanging line (3), a movable position indicator clip (6) for aligning the tension ring is also provided on the slide rail (7), and coordinate paper (4) is provided on the base (5) inside the dark box (1); a scale is provided on the side of the slide rail (7); the diameter of the slit of the light source and the slit (8) is 5-10 mm; characterized in that, Includes the following steps: S1, keep the tension ring and measuring device at a constant temperature of 20°C for more than 4 hours; S2, turn on the light source and fix the coordinate paper in the center of the base; S3, attach an adjustable hanging line to the tension ring and suspend it on a horizontal hanging rod. Adjust the length of the adjustable hanging line to make the tension ring at a suitable height. The specific height is determined by the clarity and diameter of the tension ring projection on the coordinate paper. Stabilize the tension ring so that it is vertical and stationary. S4. Adjust the movable position indicator clip on the slide rail bracket so that it is on the same horizontal line as the lowest ring of the tension ring. S5, read the position height h of the movable position indicator clamped on the slide rail bracket, the height from the light source to the coordinate paper on the base is a fixed value H; S6. Based on the projection on the coordinate paper, read the projected diameter D of the tension rings with different axial directions, and mark the circumference on the coordinate paper with a pen. S7. Read the diameter of different axes according to the marked circumference, and make a simple judgment on the roundness of the tension ring by the diameter of different axes; S8. Based on the principle of similar triangles, calculate the diameter d of the tension ring. The calculation formula is: ; Calculate d using D along different axes and take the average value; S9. To ensure accurate measurement, adjust the tension ring height h2 again according to S3 to obtain a new projected diameter D2. Repeat steps 3 to 8 to obtain d2. S10, tension ring at different heights d i The calculated average value is the actual diameter d of the tension ring.

2. A measurement method for a horizontal non-contact tension ring size measuring device, wherein the horizontal structure includes a horizontally placed dark box (1), a light source and a slit (8) are provided on one side of the dark box (1), a slide rail (7) is provided at the bottom inside the dark box (1), a movable tension ring clamp (9) and a movable coordinate paper clamp (10) are slidably connected on the slide rail (7), the movable tension ring clamp (9) holds a tension ring, and the movable coordinate paper clamp (10) holds coordinate paper (4); characterized in that, Includes the following steps: S1, keep the tension ring and measuring device at a constant temperature of 20°C for more than 4 hours; S2, turn on the light source and fix the coordinate paper in the center of the movable coordinate paper holder; S3. Clamp the tension ring metal rod at an angle parallel to the optical path onto the movable tension ring fixture. Adjust the position of the movable tension ring fixture on the slide rail to place the tension ring in a suitable position. The specific position is determined by the clarity and diameter of the tension ring projection on the coordinate paper. S4, Read the position of the movable tension ring clamp. l The length from the light source to the graph paper is L; S5. Based on the projection on the coordinate paper, read the projected diameter D of the tension ring and mark the circumference on the coordinate paper with a pen. S6. Read the diameter of different axes according to the marked circumference, and judge the roundness of the tension ring by the diameter of different axes; S7. Based on the principle of similar triangles, calculate the diameter d of the tension ring. The calculation formula is: ; Calculate d using D along different axes and take the average value; S8, to ensure accurate measurement, adjust the distance between the tension ring and the light source again according to S3. l 2 To obtain the new projected diameter D 2. Repeat steps 3-7 to obtain... d 2; S9, tension ring at different heights d i The calculated average value is the actual diameter d of the tension ring.

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