Yarn tensile strength detection device

Abstract

A yarn tensile strength detection device comprises a distance measuring unit and a mark pasting unit. The pasting and marking unit is arranged right in front of the distance measuring unit, the distance measuring unit is used for detecting the stretched distance of the yarn, the pasting and marking unit is used for conducting pasting and marking on the yarn, the distance measuring unit comprises a visual displacement sensor and an identification lens, and the identification lens is arranged on the front portion of the visual displacement sensor; the mark pasting unit comprises a telescopic frame and a positioning mark, the positioning mark is arranged in the telescopic frame, the telescopic frame stretches out and draws back to drive the positioning mark to move, the positioning mark can be attached to the yarn to be detected, and when the yarn is stretched, the moving distance of the positioning mark is detected through a visual displacement sensor; and the deformation distance of the yarn can be tested more clearly.

Description

Technical Field

[0001] This invention belongs to the field of yarn testing, specifically referring to a yarn tensile strength testing device. Background Technology

[0002] Yarn is a type of textile product made from various textile fibers processed to a certain fineness. It is used for weaving, rope making, thread making, knitting, and embroidery, and is divided into short fiber yarn and continuous filament yarn. The fineness of yarn can be expressed in various ways, such as count, metric count, English count, denier, etc.

[0003] Yarn undergoes tensile strength testing before leaving the factory. However, these mechanical devices can only test the ultimate tensile strength of the yarn and cannot test whether the yarn meets the requirements under a specific tensile force. Furthermore, they have limited functions and cannot meet the diverse needs of yarn tensile strength testing. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides a yarn tensile strength testing device, which at least partially solves the above technical problems.

[0005] The technical solution adopted by the present invention is as follows: a yarn tensile strength testing device, comprising a distance measuring unit and a marking unit, wherein the marking unit is disposed in front of the distance measuring unit, and the distance measuring unit is used to detect the distance the yarn is stretched.

[0006] Furthermore, the ranging unit includes a visual displacement sensor and a recognition lens.

[0007] Furthermore, the labeling unit includes a telescopic frame and positioning marks.

[0008] Furthermore, the telescopic frame contains a plurality of positioning marks, and the telescopic frame is configured to extend in a driven manner to contact the yarn to be tested. Each of the positioning marks is used to adhere to the surface of the yarn to be tested when in contact with the yarn.

[0009] Furthermore, the visual displacement sensor is provided with a recognition lens at the front, which is positioned directly in front of the positioning mark. The recognition lens is used to identify the position of the positioning mark and thus detect the distance the yarn is stretched.

[0010] Furthermore, the ranging unit also includes a first vertical support, a scale, a data box, and a signal transmitting device.

[0011] Furthermore, a scale is provided on the side of the first vertical support, and a data box is provided on the other side of the first vertical support. The data box is used to analyze and identify the data identified by the lens. A signal transmitting device is provided on the upper part of the data box, and the signal transmitting device is used to send out the processed data.

[0012] Furthermore, the labeling unit also includes a second vertical support, a feeding hopper, a feed bin, a telescopic control console, and a cover opening.

[0013] Furthermore, a feeding hopper is provided on one side of the second vertical support, an inlet hopper is provided on the upper part of the feeding hopper, a telescopic control console is provided at one end of the feeding hopper, the telescopic control console is configured to control the telescopic frame's extension and retraction, and a cover is provided on the outside of the telescopic frame.

[0014] Furthermore, the yarn tensile strength testing device proposed in this invention includes a fixing unit, which is disposed above the measuring unit and configured to fix the yarn to be tested.

[0015] Furthermore, the fixing unit includes an upper horizontal support frame, a fixing slot, a fixing plate, a positioning slot, and an LED emitter.

[0016] Furthermore, the upper horizontal support frame has a fixing slot inside, and multiple fixing plates are provided inside the fixing slot. Each fixing plate has a positioning slot inside, which is used to place the yarn to be tested. An LED emitter is provided on the side of the upper horizontal support frame, which is used to emit focused light.

[0017] Furthermore, the fixing unit also includes a connecting frame, a sliding table, an air valve, an upper sliding frame, and a sliding groove.

[0018] Furthermore, each of the fixed plates is provided with a connecting frame on its upper part, and each of the connecting frames is provided with a sliding table on its upper part. The sliding table is provided with an air valve on its upper part. The sliding frame is provided with a sliding groove inside, and the sliding table is placed inside the sliding groove. The air valve is configured to drive the sliding table to reciprocate inside the sliding groove.

[0019] Furthermore, the yarn tensile strength testing device proposed in this invention includes a stretching unit, which is disposed at the lower part of the measuring unit, and the stretching unit is used to fix and stretch the yarn to be tested.

[0020] Furthermore, the stretching unit includes a lower horizontal support, a fixing controller, a connecting strip, a fixing round shaft, a notch, and a placement groove.

[0021] Furthermore, the lower horizontal support has a placement groove inside, and a fixed round shaft is movably connected inside the placement groove. A connecting strip is provided on one side of the fixed round shaft, and a fixed controller is provided at the other end of the connecting strip. The fixed controller is used to control the retraction of the fixed round shaft. A notch is provided on one side of the fixed round shaft, and the notch is used to facilitate the insertion of yarn into the fixed round shaft.

[0022] Furthermore, the stretching unit also includes a receiving plate, a telescopic rod, an electric cylinder, and a signal transmitter.

[0023] Furthermore, the upper surface of the lower horizontal support is provided with a receiving plate, which is located directly below the LED transmitter. The receiving plate is used to receive the focused light emitted by the LED transmitter. The lower part of the fixed circular shaft is fixed with a telescopic rod, and the lower part of the telescopic rod is provided with an electric cylinder. The electric cylinder is configured to stretch the yarn to be tested, and the side of the electric cylinder is provided with a signal transmitter, which is used to send out the stretching data.

[0024] Furthermore, the yarn tensile strength testing device proposed in this invention includes a control unit, which is disposed outside the measuring unit and is used to control the operation of the device and display the test data.

[0025] Furthermore, the control unit includes a base and an operating table.

[0026] Furthermore, the upper part of the base is provided with an operating table, which is used to control the operation of the equipment and receive and display experimental data.

[0027] The beneficial effects achieved by the present invention using the above structure are as follows: (1) The positioning mark can be moved by the telescopic frame, and the positioning mark can be attached to the yarn to be tested. When the yarn is stretched, the distance of the positioning mark movement can be detected by the visual displacement sensor, which can more clearly test the deformation distance of the yarn.

[0028] (2) By comparing the beam of light emitted by the LED emitter, the yarn fixed inside the positioning groove can be made to be in a completely vertical state, and the final test results are more accurate. Attached Figure Description

[0029] Figure 1 This is a perspective view of a yarn tensile strength testing device according to an embodiment of the present invention; Figure 2 This is a perspective view of the ranging unit proposed in an embodiment of the present invention; Figure 3 This is a perspective view of the labeling unit proposed in an embodiment of the present invention; Figure 4 This is a perspective view of the fixing unit proposed in an embodiment of the present invention; Figure 5 This is a perspective view of the stretching unit proposed in an embodiment of the present invention; Figure 6 This is a perspective view of the control unit proposed in an embodiment of the present invention.

[0030] Among them, 1. Distance measuring unit, 2. Marking unit, 3. Fixing unit, 4. Stretching unit, 5. Control unit; 11. First vertical support; 12. Scale; 13. Data box; 14. Signal transmitting device; 15. Visual displacement sensor; 16. Recognition lens; 21. Second vertical support; 22. Feed hopper; 23. Feeding hopper; 24. Telescopic control console; 25. Cover opening; 26. Telescopic frame; 27. Positioning mark. 31. Upper horizontal support frame; 32. Fixed slot; 33. Fixed plate; 34. Positioning slot; 35. Connecting frame; 36. Sliding table; 37. Air valve; 38. Upper sliding frame; 39. Sliding slot; 310. LED transmitter. 41. Lower horizontal support; 42. Vertical fixing frame; 43. Base platform; 44. Fixing controller; 45. Connecting strip; 46. Fixing round shaft; 47. Notch; 48. Receiving plate; 49. Placement slot; 410. Telescopic rod; 411. Electric cylinder; 412. Signal transmitter. 51. Base; 52. Control panel.

[0031] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0034] like Figure 1 , Figure 2 and Figure 3As shown in the figure, an embodiment of the present invention proposes a yarn tensile strength testing device, including a distance measuring unit 1 and a marking unit 2. The marking unit 2 is located directly in front of the distance measuring unit 1. The distance measuring unit 1 is used to detect the distance the yarn is stretched, and the marking unit 2 is used to mark the yarn.

[0035] The ranging unit 1 includes a first vertical support 11, a scale 12, a data box 13, a signal transmitting device 14, a visual displacement sensor 15, and a recognition lens 16.

[0036] The labeling unit 2 includes a second vertical support 21, a feeding bin 22, a feed hopper 23, a telescopic control console 24, a cover opening 25, a telescopic frame 26, and a positioning mark 27.

[0037] In this embodiment of the invention, a visual displacement sensor 15 is provided on one side of the first vertical support 11, and a recognition lens 16 is provided at the front end of the visual displacement sensor 15. The recognition lens 16 can recognize the positioning mark 27, and the visual displacement sensor 15 can identify the distance of the object's displacement. A scale 12 is provided on the upper part of the visual displacement sensor 15. When the yarn is stretched, the scale 12 can preliminarily determine the distance of the yarn's displacement. A data box 13 is provided on the other side of the first vertical support 11. The data box 13 can analyze the data recorded by the visual displacement sensor 15. A signal transmitting device 14 is provided on the upper part of the data box 13. The signal transmitting device 14 can send the received data to the operating table 52.

[0038] A second vertical support 21 is provided directly in front of the first vertical support 11. A cover 25 is provided on one side of the second vertical support 21, and a telescopic frame 26 is provided inside the cover 25. A positioning mark 27 is provided at the front end of the telescopic frame 26. A feeding hopper 23 is provided on the other side of the second vertical support 21, and an inlet hopper 22 is provided above the feeding hopper 23. A telescopic control console 24 is provided on the other side of the feeding hopper 23. The telescopic control console 24 can control the extension and retraction of the telescopic frame 26. The inlet hopper 22 can hold the positioning mark 27. 7. The yarn is placed from the feed hopper 22 into the feed hopper 23. First, the telescopic control console 24 controls the telescopic frame 26 to retract into the feed hopper 23. Then, the telescopic control console 24 controls the telescopic frame 26 to extend outward. At this time, the front of the telescopic frame 26 will push out the positioning mark 27. The yarn to be tested will be installed between the ranging unit 1 and the labeling unit 2. As the positioning mark 27 is pushed out, the positioning mark 27 will be attached to the yarn to be tested. Therefore, when the yarn moves, it will drive the attached positioning mark 27 to move.

[0039] When the yarn is stretched, the positioning mark 27 attached to the yarn surface also moves accordingly. The visual displacement sensor 15 set on one side of the first vertical support 11 records the precise distance the positioning mark 27 moves. Traditional tensile strength testing devices can only detect the yarn's ability to withstand the ultimate breaking point. This invention can detect the distance the yarn moves under a specific tensile force. By comparing the distance the yarn moves under the same test conditions, the tensile strength grade of the yarn can be determined. For example, under the same tensile force, a qualified yarn will stretch 5cm. If the distance of the yarn is greater than 5cm during testing, it indicates that the yarn's tensile strength is unqualified. If the distance the yarn is stretched is less than 5cm, it indicates that the yarn's tensile strength is relatively strong. By classifying the stretching distance, the tensile strength of the yarn can be classified. For example, if the stretching distance is between 4-5cm, the yarn's tensile strength grade is 1; if the stretching distance is 3-4cm, it indicates that the yarn's tensile strength grade is 2. This allows for a clearer distinction of the yarn's tensile strength grade, facilitating subsequent yarn grading.

[0040] like Figure 1 and Figure 4 As shown in the figure, an embodiment of the present invention proposes a yarn tensile strength testing device, including a fixing unit 3, which is disposed on the upper part of the measuring unit 1, and the fixing unit 3 is configured to fix the yarn to be tested.

[0041] The fixing unit 3 includes an upper horizontal support frame 31, a fixing slot 32, a fixing plate 33, a positioning slot 34, a connecting frame 35, a sliding table 36, an air valve 37, an upper sliding frame 38, a sliding slot 39, and an LED emitter 310.

[0042] In this embodiment of the invention, a fixing slot 32 is provided inside the upper horizontal support frame 31, and multiple sets of fixing plates 33 are provided inside the fixing slot 32. Each fixing plate 33 has a positioning slot 34 on its inner side. The positioning slot 34 is used to place the yarn to be tested. A connecting frame 35 is provided on the upper part of the fixing plate 33, and a sliding table 36 is provided on the upper part of the connecting frame 35. The sliding table 36 is placed in the sliding groove 39. The upper sliding frame 38 has a sliding groove 39 inside. An air valve 37 is provided on the upper part of each sliding table 36. The air valve 37 is connected to compressed gas. The air valve 37 can drive the sliding table 36 to slide back and forth on the sliding groove 39. Since the lower part of the sliding table 36 is fixed to the connecting frame 35, the movement of the sliding table 36 will drive the fixing plate 33 to move. As the fixing plate 33 moves, the yarn placed in the positioning groove 34 can be clamped.

[0043] An LED emitter 310 is provided on one side of the upper horizontal support frame 31. The LED emitter 310 can emit a focused beam of light, which can form a clear beam of light. When the yarn is completely fixed, the beam of light emitted by the LED emitter 310 can be used as a reference. By adjusting the position of the yarn, the yarn can be adjusted to be completely vertical, which can make the final test results more accurate.

[0044] like Figure 1 and Figure 5 As shown, this embodiment of the invention proposes a yarn tensile strength testing device, including a tensioning unit 4, which is disposed at the lower part of the measuring unit 1, and is used to fix and stretch the yarn to be tested.

[0045] The tensioning unit 4 includes a lower horizontal support 41, a vertical fixing frame 42, a base 43, a fixing controller 44, a connecting bar 45, a fixing round shaft 46, a notch 47, a receiving plate 48, a placement slot 49, a telescopic rod 410, an electric cylinder 411, and a signal transmitter 412.

[0046] In this embodiment of the invention, a placement groove 49 is provided inside the lower horizontal support 41, and a fixed round shaft 46 is provided inside the placement groove 49. The fixed round shaft 46 is movably connected in the placement groove 49. A fixed controller 44 is provided on one side of the lower horizontal support 41, and a connecting strip 45 is provided on one side of the fixed controller 44. The connecting strip 45 is connected to the fixed round shaft 46. The fixed round shaft 46 can be controlled to retract by controlling the connecting strip 45 through the fixed controller 44. A notch 47 is provided on one side of the fixed round shaft 46. The notch 47 facilitates the placement of yarn. When the connecting strip 45 controls the fixed round shaft 46 to retract, the yarn placed in the fixed round shaft 46 can be completely fixed.

[0047] A receiving plate 48 is provided on the upper surface of the lower horizontal support 41. The receiving plate 48 is located directly below the LED emitter 310. The receiving plate 48 is used to receive the focused light emitted by the LED emitter 310, and the detected yarn can be made to appear vertical by comparing the focused light.

[0048] A telescopic rod 410 is fixed to the lower part of the fixed cylindrical shaft 46. An electric cylinder 411 is provided at the lower part of the telescopic rod 410. The electric cylinder 411 can precisely control the tension of the telescopic rod 410. The telescopic rod 410 can drive the fixed cylindrical shaft 46 to move. Since the fixed cylindrical shaft 46 is slung in the placement groove 49, when the telescopic rod 410 controls the movement of the fixed cylindrical shaft 46, it can drive the yarn placed inside the fixed cylindrical shaft 46 to move. By applying a specific tension to the telescopic rod 410 through the electric cylinder 411, the yarn can be moved. The yarn placed inside the fixed cylindrical shaft 46 is stretched by a specific tension to meet the yarn detection under different conditions. A signal transmitter 412 is provided on one side of the electric cylinder 411. The signal transmitter 412 can transmit the data collected by the electric cylinder 411 to the operating table 52, and the yarn force analysis diagram can be displayed on the operating table 52. Multiple sets of vertical fixing frames 42 are provided at the lower part of the lower horizontal support 41. A base 43 is provided at the lower part of the vertical fixing frame 42. The base 43 is used to fix the electric cylinder 411 and the signal transmitter 412.

[0049] By applying specific tension to the fixed cylindrical shaft 46 using the electric cylinder 411, the yarn can be tested for specific tension. Not only can the yarn displacement distance be detected under specific tension conditions, but it can also be tested for the ultimate tensile force when the yarn breaks, just like a traditional tensile testing device. Through various different testing conditions, the tensile strength of the yarn can be detected more quickly and accurately.

[0050] like Figure 1 and Figure 6 As shown in the figure, an embodiment of the present invention proposes a yarn tensile strength testing device, including a control unit 5. The control unit 5 is disposed outside the measuring unit 1, and the control unit 5 is used to control the operation of the device and display the test data.

[0051] The control unit 5 includes a base 51 and an operating table 52.

[0052] In this embodiment of the invention, the upper part of the base 51 is provided with an operating table 52. The operating table 52 is used to control the operation of the equipment and receive and display experimental data. The final test results will be sent to the operating table 52 and displayed in the form of icons.

[0053] First, the operator fixes one end of the yarn in the positioning groove 34 and the other end in the fixing shaft 46. As the fixing plate 33 moves the positioning groove 34, the yarn placed inside the positioning groove 34 can be clamped. The fixing shaft 46 at the bottom is tightened under the control of the fixing controller 44, which can firmly fix the yarn placed in the fixing shaft 46. At this time, the yarn will be completely fixed. Then, the telescopic frame 26 moves the positioning mark 27. As the telescopic frame 26 moves, the positioning mark 27 at its front end can be attached to the surface of the yarn to be tested. When the yarn surface is attached to the positioning mark 27, the visual displacement sensor 15 will record the initial position of the positioning mark 27.

[0054] Next, the electric cylinder 411 drives the telescopic rod 410 to apply a specific pulling force. As the fixed round shaft 46 is stretched, the yarn fixed inside it is also stretched. The stretched yarn will deform. The visual displacement sensor 15 will record the distance of yarn displacement under the specific pulling force and compare it with the distance of qualified yarn displacement under the same conditions. The final result will be sent to the operating table 52. The electric cylinder 411 can also break the yarn to test the yarn's ultimate tensile strength. Through the above scheme, the final result can be more accurate.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

[0057] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A yarn tensile strength testing device, characterized in that: It includes a distance measuring unit (1) and a labeling unit (2), wherein the labeling unit (2) is located directly in front of the distance measuring unit (1), and the distance measuring unit (1) is used to detect the distance the yarn is stretched; The ranging unit (1) includes a visual displacement sensor (15) and a recognition lens (16); the recognition lens (16) is used to identify the distance the yarn is stretched. The labeling unit (2) includes a telescopic frame (26) and a positioning mark (27). The telescopic frame (26) contains a plurality of positioning marks (27), and the telescopic frame is configured to extend in a driven manner to contact the yarn to be tested. Each of the positioning marks (27) is used to adhere to the surface of the yarn to be tested when in contact with the yarn. The visual displacement sensor (15) is provided with a recognition lens (16) at the front. The recognition lens (16) is located directly in front of the positioning mark (27). The recognition lens (16) is used to identify the position of the positioning mark (27) and thus detect the distance the yarn is stretched.

2. The yarn tensile strength testing device according to claim 1, characterized in that: The ranging unit (1) also includes a first vertical support (11), a scale (12), a data box (13), and a signal transmitting device (14). The first vertical support (11) has a scale (12) on its side and a data box (13) on its other side. The data box (13) is used to analyze and identify the data identified by the lens (16). The upper part of the data box (13) is equipped with a signal transmitting device (14) for transmitting the processed data.

3. The yarn tensile strength testing device according to claim 1, characterized in that: The labeling unit (2) also includes a second vertical support (21), a feeding hopper (22), a feeding hopper (23), a telescopic control console (24), and a cover opening (25); The second vertical support (21) has a feeding hopper (23) on one side, a feeding hopper (22) on the upper part of the feeding hopper (23), a telescopic control console (24) at one end of the feeding hopper (23), the telescopic control console (24) is configured to control the telescopic frame (26) and the telescopic frame (26) has a cover (25) on the outside.

4. The yarn tensile strength testing device according to claim 1, characterized in that: It includes a fixing unit (3), which is disposed on the upper part of the ranging unit (1) and is configured to fix the yarn to be detected.

5. The yarn tensile strength testing device according to claim 4, characterized in that: The fixing unit (3) includes an upper horizontal support frame (31), a fixing slot (32), a fixing plate (33), a positioning slot (34), and an LED emitter (310). The upper horizontal support frame (31) has a fixed slot (32) inside, and multiple fixed plates (33) are provided inside the fixed slot (32). Each fixed plate (33) has a positioning slot (34) inside. The positioning slot (34) is used to place the yarn to be tested. The side of the upper horizontal support frame (31) is provided with an LED emitter (310). The LED emitter (310) is used to emit focused light.

6. The yarn tensile strength testing device according to claim 5, characterized in that: The fixing unit (3) also includes a connecting frame (35), a sliding table (36), an air valve (37), an upper sliding frame (38), and a sliding groove (39). Each of the fixed plates (33) is provided with a connecting frame (35) on its upper part, and each of the connecting frames (35) is provided with a sliding table (36) on its upper part. The sliding table (36) is provided with an air valve (37) on its upper part. The sliding frame (38) is provided with a sliding groove (39) inside. The sliding table (36) is placed inside the sliding groove (39). The air valve (37) is configured to drive the sliding table (36) to reciprocate inside the sliding groove (39).

7. The yarn tensile strength testing device according to claim 1, characterized in that: Includes a stretching unit (4), which is disposed at the lower part of the measuring unit (1) and is used to fix and stretch the yarn to be tested.

8. The yarn tensile strength testing device according to claim 7, characterized in that: The stretching unit (4) includes a lower horizontal support (41), a fixed controller (44), a connecting bar (45), a fixed round shaft (46), a notch (47), and a placement groove (49). The lower horizontal support (41) has a placement groove (49) inside, and a fixed round shaft (46) is movably connected inside the placement groove (49). A connecting strip (45) is provided on one side of the fixed round shaft (46), and a fixed controller (44) is provided at the other end of the connecting strip (45). The fixed controller (44) is used to control the retraction of the fixed round shaft (46). A notch (47) is provided on one side of the fixed round shaft (46), and the notch (47) is used to facilitate the insertion of yarn into the fixed round shaft (46).

9. The yarn tensile strength testing device according to claim 8, characterized in that: The stretching unit (4) also includes a receiving plate (48), a telescopic rod (410), an electric cylinder (411), and a signal transmitter (412). The lower horizontal support (41) has a receiving plate (48) on its upper surface. The receiving plate (48) is located directly below the LED transmitter (310). The receiving plate (48) is used to receive the focused light emitted by the LED transmitter (310). The lower part of the fixed round shaft (46) is fixed to the telescopic rod (410). The lower part of the telescopic rod (410) is equipped with an electric cylinder (411). The electric cylinder (411) is configured to stretch the yarn to be tested. The side of the electric cylinder (411) is equipped with a signal transmitter (412). The signal transmitter (412) is used to send out the stretching data.

10. The yarn tensile strength testing device according to claim 1, characterized in that: Includes a control unit (5), which is disposed outside the ranging unit (1), and the control unit (5) is used to control the operation of the device and display the test data; The control unit (5) includes a base (51) and an operating table (52); The base (51) is provided with an operating table (52) on its upper part. The operating table (52) is used to control the operation of the equipment and to receive and display experimental data.

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