An optical sensor

Abstract

The application relates to the technical field of sensors, in particular to an optical sensor; the optical sensor comprises a sensor body, a measuring groove is formed in the middle of the sensor body, yarn realizes diameter measurement after passing through the measuring groove, a pin is arranged at the bottom of the sensor body, limiting seats are fixedly connected at the two ends of the measuring groove, a center hole is arranged in the middle of the limiting seat, a rotating sleeve is rotationally connected in the center hole, and two center rods are arranged on the inner wall of the rotating sleeve and parallel to each other; the yarn entering the measuring groove is guided by the rotating roller, and the yarn is limited by the rotating sleeve, so that the shaking range of the yarn in the measuring process in the measuring groove is reduced, and the measurement accuracy and the measurement efficiency of the optical sensor on the yarn are improved.

Description

Technical Field

[0001] This invention relates to the field of sensor technology, specifically to an optical sensor. Background Technology

[0002] An optical sensor is a type of sensor that measures based on optical principles. It offers numerous advantages, such as non-contact and non-destructive measurement, near-unaffected operation, high-speed transmission, and remote measurement and control capabilities. It primarily includes general optical metrology instruments, laser interferometers, gratings, encoders, and fiber optic optical sensors and instruments. In design, they are mainly used to detect the presence of target objects or to perform motion detection in various industrial, automotive, electronic product, and retail automation applications.

[0003] The textile process refers to taking animal or plant fibers and twisting them to form a continuous, infinitely extending yarn, which is then woven into fabric using a weaving machine. Before weaving, the diameter of the yarn is measured using an optical sensor. A slender object is guided through the measurement area of ​​the optical sensor and observed in a projection manner. However, in the process of measuring the yarn diameter, the existing optical sensors are affected by the swaying of the yarn during the pulling and moving process, which affects the accuracy of the optical sensor's measurement of the yarn. At the same time, it makes the calculation of the measurement data of the optical sensor more complicated and affects the measurement efficiency.

[0004] In view of this, in order to overcome the above-mentioned technical problems, the present invention proposes an optical sensor that solves the above-mentioned technical problems. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention proposes an optical sensor. This invention guides the yarn entering the measuring groove using a rotating roller, and then uses a rotating sleeve to limit the yarn, thereby reducing the vibration amplitude of the yarn during the measurement process in the measuring groove, and thus improving the measurement accuracy and efficiency of the optical sensor.

[0006] The technical solution adopted by this invention to solve its technical problem is: an optical sensor as described in this invention, comprising:

[0007] Sensor body; a measuring groove is formed by a recess in the middle of the sensor body; the diameter of the yarn is measured after passing through the measuring groove;

[0008] Pins; the pins are located at the bottom of the sensor body;

[0009] The optical sensor also includes:

[0010] Limiting seat; the limiting seat is fixedly connected to both ends of the measuring groove;

[0011] The center hole is arranged in the middle of the limiting seat;

[0012] The rotating sleeve is rotationally connected in the center hole;

[0013] The center rods are two, and are arranged on the inner wall of the rotating sleeve in parallel with each other;

[0014] The rotating rollers are rotationally connected on the corresponding center rods.

[0015] Preferably, the inner walls of the two ends of the rotating sleeve are rotationally connected with the rotating rollers through the center rods; one of the inner walls of the rotating sleeve is provided with a groove; the groove is located between the rotating rollers at the two ends of the rotating sleeve; a U-shaped plate is slidably connected in the groove; the opening of the U-shaped plate faces away from the groove bottom, and the U-shaped plate and the groove bottom are connected through a first spring; the two ends of the U-shaped plate are rotationally connected with an adjusting roller.

[0016] Preferably, the groove is spirally distributed along the central axis of the rotating sleeve.

[0017] Preferably, the U-shaped plate is in sliding sealing connection with the groove; the middle part of the U-shaped plate is provided with a ventilation hole; one end of the ventilation hole faces the adjusting roller, and the other end communicates with the inside of the groove; the inside of the groove is internally provided with talcum powder.

[0018] Preferably, the inner sides of the two rotating sleeves close to each other are fixedly connected with a flexible film; the center of the flexible film is provided with a circular groove; an elastic ring is fixedly connected in the circular groove; the elastic ring is sleeved on the outer wall of the yarn under the action of the elastic force.

[0019] Preferably, a stepped hole is arranged between the upper end of the limiting seat and the inner wall of the center hole; the inner wall with a smaller diameter of the stepped hole is screw-connected with a screw.

[0020] Preferably, the inner wall with a larger diameter of the stepped hole is symmetrically and transversely provided with a sliding groove; an isosceles trapezoidal strip is slidably connected in the sliding groove; the parts of the isosceles trapezoidal strips away from each other are elastic.

[0021] Preferably, the inner wall of the other rotating sleeve is transversely and rotationally connected with a limiting roller above; the yarn passes around the limiting roller; a marker pen is arranged above the limiting roller; a threaded hole is arranged in the rotating sleeve above the marker pen; the upper end of the threaded hole penetrates through the limiting seat; a stop screw is screw-connected in the threaded hole; the marker pen is fixedly connected with the lower end of the stop screw.

[0022] The beneficial effects of the present application are as follows:

[0023] 1. The present application guides the yarn entering the measuring groove through the rotating roller, and cooperates with the rotating sleeve to limit the yarn, thereby reducing the shaking amplitude of the yarn during the measuring process in the measuring groove, and further improving the measuring accuracy and efficiency of the optical sensor on the yarn.

[0024] 2. In the process of excessive pulling of the yarn length, the yarn will extrude the adjusting roller, so that the adjusting roller pushes the U-shaped plate to slide along the groove, i.e. the No. 1 spring is compressed, thereby releasing the yarn length for excessive pulling of the yarn, ensuring that the yarn is tightly appropriate, avoiding that the diameter of some elastic yarns will be smaller after being excessively pulled, thereby causing measurement error.

[0025] 3. Under the rolling and crushing effect of the adjusting roller, the fluff and fibers on the surface of the yarn are bent and then pressed onto the surface of the yarn, and the irregular places on the surface of the yarn are also pressed, so that the surface of the yarn is more flat after being crushed by the adjusting roller, and some bent places of the yarn are straightened under the crushing effect of the adjusting roller, so that the part of the yarn entering the measuring groove becomes regular. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application will be further described below in combination with the drawings and embodiments.

[0027] Figure 1 is a perspective view of the present application;

[0028] Figure 2 is a sectional view of the present application;

[0029] Figure 3 is Figure 2 an enlarged view of A in

[0030] Figure 4 is Figure 2 an enlarged view of B in

[0031] Figure 5 is Figure 2 an enlarged view of C in

[0032] Figure 6 is a position structure diagram of the isosceles trapezoidal strip in the present application;

[0033] Figure 7 is Figure 6 an enlarged view of D in

[0034] In the figure: sensor body 1, measuring groove 11, pin 2, limiting seat 3, center hole 31, stepped hole 32, screw 33, sliding groove 34, isosceles trapezoidal strip 35, rotating sleeve 4, groove 41, U-shaped plate 42, No. 43 spring, adjusting roller 44, air hole 45, talcum powder 46, flexible film 47, circular groove 48, elastic ring 49, center rod 5, rotating roller 6, limiting roller 7, marker pen 71, threaded hole 72, set screw 73, transition roller 8. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0036] As Figures 1 to 7 shown, the optical sensor comprises:

[0037] Sensor body 1; the measuring groove 11 is recessed in the middle of the sensor body 1; the yarn realizes diameter measurement after passing through the measuring groove 11;

[0038] Pin 2; the pin 2 is arranged at the bottom of the sensor body 1;

[0039] The optical sensor further comprises:

[0040] Limiting seat 3; the limiting seat 3 is fixedly connected at both ends of the measuring groove 11;

[0041] Center hole 31; the center hole 31 is arranged through the middle of the limiting seat 3;

[0042] Rotating sleeve 4; the rotating sleeve 4 is rotationally connected in the center hole 31;

[0043] Center rod 5; the center rod 5 is two; the center rod 5 is arranged on the inner wall of the rotating sleeve 4 in parallel with each other;

[0044] Rotating roller 6; the rotating roller 6 is rotationally connected on the corresponding center rod 5;

[0045] When working, the existing optical sensor will be affected in the process of measuring the yarn diameter because the yarn is moved by traction, the shaking of the yarn in the moving process will affect the accuracy of the optical sensor measuring the yarn, at the same time, the operation of the optical sensor measuring data is more complicated, which affects the measuring efficiency;

[0046] Therefore, the sensor body 1 is first fixed on the support frame through the connecting member such as the screw 33, and then the electric wire is connected through the pin 2. The installation position of the sensor body 1 is such that the length direction of the sensor body 1 is not parallel to the pulling direction of the yarn, so that the yarn can be inclined to a certain extent into the rotating sleeve 4, that is, the yarn can contact at least one of the two rotating rollers 6 in the rotating sleeve 4, so that the rotating roller 6 can rotate under the action of the friction force of the yarn in the process of realizing the guiding of the yarn, so that the rotating roller 6 can rotate around the center rod 5. The pulled yarn is located inside the rotating sleeve 4 at the other end of the measuring groove 11 after passing through the measuring groove 11, and is pulled out under the guidance of the other group of rotating rollers 6. After the pin 2 is powered on, the sensor body 1 emits a light source from one of the groove walls of the measuring groove 11, which irradiates the surface of the yarn. The diameter change of the yarn will change the amount of transmitted light, and then the light source irradiates the other groove wall, so that the internal elements of the sensor body 1 record it. The detection data is transmitted out through the pin 2 to calculate the diameter data of the yarn. When the diameter data of the yarn exceeds the set threshold value, an alarm will be realized. The staff will check and mark the alarm part, so as to avoid the diameter unqualified yarn being woven into the cloth to affect the quality of the cloth. According to the angle of the yarn entering the rotating sleeve 4, the rotating sleeve 4 can be adjusted to rotate in the center hole 31, so that the yarn at least contacts one rotating roller 6 inside the rotating sleeve 4 during the process of passing through the rotating sleeve 4, so as to ensure that the rolling friction is generated when the yarn is guided. Compared with sliding friction, rolling friction can better reduce the wear of the rotating roller 6 and the surface of the yarn, so as to avoid the fibers on the surface of the yarn being hooked out after wear, causing the surface of the yarn to be uneven or even deformed, and causing the optical sensor to make a wrong judgment on the diameter measurement of the yarn. Therefore, the rolling guidance of the rotating roller 6 to the yarn is necessary. It can also be seen that the application can be applied to yarns entering the rotating sleeve 4 in different directions, and the applicability is stronger. After the yarn is pulled, it will vibrate and shake. The yarn is inclined to enter the rotating sleeve 4 and is also inclined to pull out the other rotating sleeve 4. Therefore, the rotating rollers 6 in the two rotating sleeves 4 guide the yarn, and with the vibration of the yarn, the rotating sleeve 4 will slightly rotate in the center hole 31. The direction of the pulled yarn is closer to the center axis of the two rotating sleeves 4, so the influence on the shaking of the yarn in the measuring groove 11 is small. The amplitude of the yarn shaking of the application is small, and the calculation difficulty is also small, that is, the calculation efficiency is improved. The middle diameter of the rotating roller 6 is smaller than the diameters at both ends, so that the yarn moves close to the middle part of the rotating roller 6 during the pulling process, reducing the probability of slipping off the rotating roller 6.

[0047] The application guides the yarn entering the measuring groove 11 through the rotating roller 6, and cooperates with the rotating sleeve 4 to limit the yarn, thereby reducing the shaking amplitude of the yarn during the measuring process in the measuring groove 11, and further improving the measuring accuracy and efficiency of the optical sensor on the yarn.

[0048] As an embodiment of the application, the inner walls of the two ends of the rotating sleeve 4 are rotatably connected with the rotating roller 6 through the center rod 5; one of the inner walls of the rotating sleeve 4 is provided with a groove 41; the groove 41 is located between the rotating rollers 6 at the two ends of the rotating sleeve 4; a U-shaped plate 42 is slidably connected in the groove 41; the opening of the U-shaped plate 42 faces away from the groove bottom of the groove 41, and the U-shaped plate 42 and the groove bottom of the groove 41 are connected through a first spring 43; an adjusting roller 44 is rotatably connected between the two ends of the U-shaped plate 42;

[0049] During the yarn is being pulled, the first spring 43 provides a pushing force to the U-shaped plate 42, so that the adjusting roller 44 rotatably connected to the U-shaped plate 42 is pressed against the yarn under the pushing force of the first spring 43, so that the yarn in the rotating sleeve 4 is pressed by the adjusting roller 44. As known to all, the straight line between two points is the shortest, and after the yarn in the rotating sleeve 4 is pressed by the adjusting roller 44 in this embodiment, the length of the yarn in the rotating sleeve 4 will increase, so that the yarn is tightened through the cooperation of the first spring 43 and the adjusting roller 44 during the relaxation of the yarn. Compared with the relaxed yarn entering the measuring groove 11 for measurement, the measurement difficulty of the tightened yarn is smaller and the accuracy is higher. During the yarn is being excessively pulled, the yarn will extrude the adjusting roller 44, so that the adjusting roller 44 pushes the U-shaped plate 42 to slide along the groove 41, that is, the first spring 43 is compressed, thereby releasing the yarn length for excessive pulling of the yarn, ensuring that the yarn is tightened appropriately, avoiding that the diameter of some elastic yarns will be smaller after being excessively pulled, thereby causing measurement error. Therefore, this embodiment can appropriately tighten the yarn of relaxation or elasticity, thereby improving the measurement accuracy. In this embodiment, the adjusting roller 44 is arranged to roll, and the yarn can form rolling between the adjusting roller 44, thereby reducing the abrasion through rolling friction.

[0050] As an embodiment of the application, the groove 41 is spirally distributed along the central axis of the rotating sleeve 4;

[0051] During operation, spring 43 exerts a pushing force on U-shaped plate 42, causing U-shaped plate 42 to press against the yarn surface in conjunction with adjusting roller 44 under the pushing force of spring 43. As the yarn is pulled, friction drives adjusting roller 44 to rotate. The rotation of adjusting roller 44 applies a certain force to the yarn surface, causing protruding fibers or other protruding materials on the yarn surface to bend and then pressed against the yarn surface. Simultaneously, it presses together irregular areas of the yarn surface, making the yarn surface smoother after being pressed by adjusting roller 44, and also smoothing out some bends in the yarn. The yarn is straightened under the rolling action of the adjusting roller 44, making the part of the yarn entering the measuring groove 11 more regular. In this embodiment, the groove 41 is spirally arranged on the inner wall of the rotating sleeve 4, so the adjusting roller 44 can roll the yarn surface from all directions, making the surface of the adjusting roller 44 smoother. Because it is spiral rolling, some longer fibers and other materials are rolled and rolled along the spiral to the yarn surface, so that the longer fibers are not easy to loosen and fall off again after being spirally bound to the yarn surface, thereby improving the surface smoothness of the yarn entering the measuring groove 11. In this embodiment, the groove 41 is spirally distributed around the central axis of the rotating sleeve 4 at least once.

[0052] In one embodiment of the present invention, the U-shaped plate 42 is slidably and sealingly connected to the groove 41; a vent 45 is provided in the middle of the U-shaped plate 42; one end of the vent 45 faces the adjusting roller 44, and the other end communicates with the inside of the groove 41; the inside of the groove 41 is filled with talcum powder 46.

[0053] During operation, the yarn sways as it is pulled, causing it to pull or loosen within the rotating sleeve 4. This pulling action compresses the adjusting roller 44, causing it to move the U-shaped plate 42 closer to the bottom of the groove 41. As the U-shaped plate 42 moves, the space within the groove 41 decreases. With the amount of gas remaining constant, the air pressure within the groove 41 increases. This increased pressure causes gas to be ejected through the vent 45. As the gas exits through the vent 45, it carries talcum powder 46 out of the groove 41, which then coats the outer wall of the adjusting roller 44 and subsequently spreads it onto the outer surface of the yarn. The main function of talcum powder 46 is to absorb moisture and oil from the roller surface and spinning channel, keeping the surface smooth and slippery, thereby reducing entanglement caused by oil adhesion. In particular, pure synthetic fibers contain a large amount of oil, which can easily cause entanglement and blockage due to oil adhesion, thus ensuring smooth spinning. At the same time, it also reduces the friction between the yarn and the adjusting roller 44, as well as the friction between the yarn and the rotating roller 6, reducing damage to the yarn surface and its impact on yarn measurement. Excess talcum powder 46 on the yarn surface falls into the lower inner part of the rotating sleeve 4. During the relaxation of the yarn in the rotating sleeve 4, the first spring 43 will drive the U-shaped plate 42 to reset along the groove 41, thereby creating a negative pressure in the groove 41, causing the excess talcum powder 46 to be drawn back into the groove 41 with the airflow.

[0054] In one embodiment of the present invention, a flexible membrane 47 is fixedly connected to the inner openings of the two rotating sleeves 4 that are close to each other; a circular groove 48 is provided in the center of the flexible membrane 47; an elastic ring 49 is fixedly connected in the circular groove 48; the elastic ring 49 is sleeved on the outer wall of the yarn under the action of elastic force.

[0055] During operation, the elastic ring 49, under its own elastic force, will be fitted onto the yarn. As the yarn is stretched, the U-shaped plate 42 will compress the gas in the groove 41. The gas will enter the inner side of the rotating sleeve 4 through the vent 45. Due to the obstruction of the flexible membrane 47, the talcum powder 46 propelled by the gas will not float between the two rotating sleeves 4, thus preventing the floating talcum powder 46 from affecting the accuracy of yarn measurement. Simultaneously, the elastic ring 49 will slide off excess talcum powder 46 from the yarn surface, serving both the purpose of talcum powder 46 recovery and improving the cleanliness of the yarn surface. The compacted talcum powder 46 on the yarn surface will not be removed by the elastic ring 49. During the process of yarn stretching and loosening, because there are elastic rings 49 binding at both ends of the measuring groove 11, the yarn between the two elastic rings 49 only reacts after the first spring 43 changes, thus delaying the change of the yarn between the two elastic rings 49. This prevents the stretching or loosening of the yarn from being immediately transmitted to the part of the yarn being measured, ensuring that the yarn is in a stable state for measurement by the optical sensor. Furthermore, the elastic rings 49 are flexible enough to be used for different diameters, and their elasticity provides a binding force on the passing yarn, thereby shaping the cross-section of some yarns.

[0056] In one embodiment of the present invention, a stepped hole 32 is provided between the upper end of the limiting seat 3 and the inner wall of the central hole 31; the inner wall of the stepped hole 32 with a smaller diameter is threaded with a screw 33; during operation, the optical sensor is first installed in a suitable position, and then the screw 33 is loosened so that the end of the screw does not contact the outer wall of the rotating sleeve 4. Then, the rotating sleeve 4 is rotated at the position of the central hole 31 according to the angle at which the yarn enters the inner wall of the rotating sleeve 4, so that the yarn can be placed on at least one of the rotating rollers 6 while entering the rotating sleeve 4. Then, the screw 33 is tightened, and the screw 33 abuts against the outer wall of the rotating sleeve 4, thereby increasing the friction between the screw 33 and the outer wall of the rotating roller 6, so that the rotating sleeve 4 cannot rotate freely, thereby reducing the influence of the rotating sleeve 4 on the yarn detection in the measuring groove 11 due to the rotation of the rotating sleeve 4 during the yarn shaking process, and improving the measurement stability.

[0057] In one embodiment of the present invention, the inner wall of the stepped hole 32 with a larger diameter is provided with a symmetrical transverse groove 34; an isosceles trapezoidal strip 35 is slidably connected in the groove 34; the portions of the isosceles trapezoidal strip 35 that are far apart from each other are elastic;

[0058] During operation, as the screw 33 is screwed into the stepped hole 32, the tip of the screw 33 presses against the inclined surface of the isosceles trapezoidal strip 35. This causes the two isosceles trapezoidal strips 35 to slide along the groove 34 and move away from each other after being pressed. Finally, the parts of the isosceles trapezoidal strips 35 that have moved away from each other contact the wall of the measuring groove 11 after sliding. The isosceles trapezoidal strips 35 increase the friction between the limiting seat 3 and the measuring groove 11, thus locking the limiting seat 3 into the measuring groove 11. To unlock, simply unscrew the screw 33 from the stepped hole 32. The unlocked limiting seat 3 can then slide freely within the measuring groove 11. The position of the yarn being measured in the measuring groove 11 can be changed by moving the two limit seats 3, and the length of the yarn being measured by the optical sensor can also be changed by changing the distance between the two limit seats 3, thus meeting different needs. During maintenance, the limit seats 3 can be directly unlocked from the measuring groove 11, which is convenient for disassembly and maintenance, and also makes it easy for the yarn to pass back through the rotating sleeve 4, which is convenient for inspection and installation. The purpose of making the isosceles trapezoidal bars 35 more flexible is to reduce the scratches on the bottom of the measuring groove 11 by the isosceles trapezoidal bars 35 and protect the integrity of the groove wall of the measuring groove 11.

[0059] In one embodiment of the present invention, a limiting roller 7 is laterally rotatably connected to the upper part of the inner wall of another rotating sleeve 4; the yarn passes over and around the limiting roller 7 via a transition roller 8; a marker 71 is provided directly above the limiting roller 7; a threaded hole 72 is provided through the rotating sleeve 4 directly above the marker 71; the upper end of the threaded hole 72 passes through the limiting seat 3; a set screw 73 is threadedly connected inside the threaded hole 72; the lower end of the marker 71 is fixedly connected to the set screw 73; the transition roller 8 is rotatably connected to the inner wall of the rotating sleeve 4; by setting the transition roller 8, the yarn is kept as parallel as possible to the center line of the center hole 31 during its movement in the measuring groove 11, thereby improving the measurement accuracy;

[0060] During operation, the diameter of the middle part of the limiting roller 7 is smaller than the diameter of the end part, so that the yarn can remain in the middle position during the movement of the limiting roller 7. The operator will turn the set screw 73 in the threaded hole 72, which will drive the marker pen 71 to move up and down. This will make the distance between the marker pen 71 and the outer wall of the middle part of the limiting roller 7 equal to the upper limit of the yarn diameter. When the diameter of the yarn is greater than the threshold, the yarn will come into contact with the marker pen 71, and the marker pen 71 will draw ink on the outer wall of the yarn. The yarn will move away from the marker pen 71 when the diameter of the yarn is less than the threshold, and the marker pen 71 will stop marking. At the same time, this application can be applied to marking yarns of different diameters, that is, by turning the set screw 73 to change the distance between the marker pen 71 and the outer wall of the limiting roller 7.

[0061] The specific workflow is as follows:

[0062] In this invention, the sensor body 1 is first fixed to the support frame by a connector such as screw 33, and then connected to an electrical wire by a pin 2. The installation position of the sensor body 1 is such that the length direction of the sensor body 1 is not parallel to the traction direction of the yarn, allowing the yarn to enter the rotating sleeve 4 at a certain degree of inclination. That is, the yarn can contact at least one of the two rotating rollers 6 inside the rotating sleeve 4. Thus, during the traction process, the rotating roller 6 can rotate under the action of the yarn's friction while guiding the yarn, causing the rotating roller 6 to rotate around the central rod 5. After passing through the measuring groove 11, the pulled yarn is located inside the rotating sleeve 4 at the other end of the measuring groove 11, and is pulled out under the guidance of another set of rotating rollers 6. After the sensor body 1 is energized by the pin 2, a light source is emitted from one of the groove walls of the measuring groove 11, which illuminates the surface of the yarn. The change in the diameter of the yarn will change the amount of transmitted light. Subsequently, the light source illuminates the other groove wall, which is then recorded by the internal components of the sensor body 1. The detection data is then transmitted out by the pin 2. The yarn diameter data is calculated. When the yarn diameter data exceeds the set threshold, an alarm will be triggered, and the operator will be notified. The alarm section will be inspected and marked to prevent substandard yarn from being woven into the fabric and affecting its quality. Based on the angle at which the yarn enters the rotating sleeve 4, this application allows adjustment of the rotating sleeve 4 within the central hole 31. This ensures that the yarn contacts at least one internal rotating roller 6 during its passage through the rotating sleeve 4, guaranteeing that rolling friction occurs during yarn guidance. Compared to sliding friction, rolling friction better reduces wear between the rotating roller 6 and the yarn surface, thus preventing fibers from being pulled out after yarn wear, which could cause unevenness or even deformation of the yarn surface. The optical sensor misjudges the yarn diameter measurement, so the rotating roller 6 is necessary to guide the rolling of the yarn. It can also be seen that this application can be applied to yarns injected into the rotating sleeve 4 from different directions, and has stronger applicability. After the yarn is pulled, it will shake and sway. The yarn is pulled into the rotating sleeve 4 at an angle and pulled out of the other rotating sleeve 4 at an angle. Therefore, the rotating roller 6 in both rotating sleeves 4 guides the yarn. As the yarn shakes, the rotating sleeve 4 will rotate slightly in the central hole 31, and the yarn is closer to the central axis of the two rotating sleeves 4 in the direction of being pulled.

[0063] During the yarn pulling process, spring 43 provides a pushing force to U-shaped plate 42, causing the adjusting roller 44 rotatably connected to U-shaped plate 42 to press against the yarn under the pushing force of spring 43. This causes the yarn inside rotating sleeve 4 to bend under the pressure of adjusting roller 44. As is well known, the shortest distance between two points is a straight line. In this embodiment, after the yarn inside rotating sleeve 4 is bent by adjusting roller 44, the length of the yarn inside rotating sleeve 4 increases. This allows the yarn to be tightened during the relaxation process through the combination of spring 43 and adjusting roller 44. Compared to measuring a relaxed yarn in measuring groove 11, measuring a tightened yarn is much easier. This method offers higher accuracy. During excessive stretching of the yarn, the yarn compresses the adjusting roller 44, causing it to push the U-shaped plate 42 along the groove 41, thus compressing the first spring 43. This releases excess yarn length and ensures proper yarn tension. The first spring 43 exerts a pushing force on the U-shaped plate 42, causing it to press against the yarn surface in conjunction with the adjusting roller 44. During the stretching process, friction drives the adjusting roller 44 to rotate. This rotation applies pressure to the yarn surface, causing protruding fibers or fuzz to be crushed. Under the rolling and pressing action of the adjusting roller 44, the fluff and fibers on the yarn surface are bent by the adjusting roller 44 and then pressed to the yarn surface. At the same time, irregular areas on the yarn surface are pressed, making the yarn surface smoother after being rolled by the adjusting roller 44. Some bent parts of the yarn are straightened under the rolling action of the adjusting roller 44, making the part of the yarn entering the measuring groove 11 more regular. In this embodiment, the groove 41 is spirally arranged on the inner wall of the rotating sleeve 4, so the adjusting roller 44 can roll the yarn surface from all directions. And because it is spiral rolling, some longer fibers and other materials are rolled and pressed to the yarn surface along the spiral. The yarn will sway during the pulling process. The swaying yarn will cause a certain degree of tension to the yarn in the rotating sleeve 4, that is, tightening or loosening. During the pulling process of the yarn in the rotating sleeve 4, the yarn will squeeze the adjusting roller 44, causing the adjusting roller 44 to drive the U-shaped plate 42 to slide along the bottom of the groove 41. The space in the groove 41 becomes smaller under the action of the movement of the U-shaped plate 42. With the amount of gas in the space remaining unchanged, the air pressure in the groove 41 increases. After the air pressure in the groove 41 increases, the gas will be ejected along the vent hole 45. During the process of the gas being ejected along the vent hole 45, the gas will drive the talcum powder 46 in the groove 41 to be ejected.The elastic ring 49, under its own elastic force, will be fitted onto the yarn. During the process of the yarn being tightened and pulled, it will cause the U-shaped plate 42 to compress the gas in the groove 41. The gas will enter the inner side of the rotating sleeve 4 along the vent 45. Due to the obstruction of the flexible membrane 47, the talcum powder 46 that is propelled by the gas will not float between the two rotating sleeves 4, thus avoiding the floating talcum powder 46 affecting the accuracy of yarn measurement. At the same time, the elastic ring 49 will slide off the excess talcum powder 46 on the yarn surface, which serves two purposes: firstly, to recover the talcum powder 46, and secondly, to improve the cleanliness of the yarn surface. The talcum powder 46 on the compacted yarn surface will not be scraped away by the elastic ring 49. During the process of yarn tension and relaxation, Because both ends of the measuring groove 11 are bound by elastic rings 49, the yarn between the two elastic rings 49 only reacts after the first spring 43 changes, thus delaying the change in the yarn between the two elastic rings 49. This prevents the tension or slack of the yarn from being immediately transmitted to the part of the yarn being measured, ensuring that the yarn is in a stable state for measurement by the optical sensor. After installing the optical sensor in the appropriate position, the screw 33 is loosened so that the end of the screw does not contact the outer wall of the rotating sleeve 4. Then, the rotating sleeve 4 is rotated at the position of the central hole 31 according to the angle at which the yarn enters the inner wall of the rotating sleeve 4, so that the yarn can at least overlap the center hole while entering the rotating sleeve 4. On one of the rotating rollers 6, screw 33 is then tightened. Screw 33 abuts against the outer wall of the rotating sleeve 4, increasing the friction between the screw 33 and the outer wall of the rotating roller 6. This prevents the rotating sleeve 4 from rotating freely, thus reducing the impact on yarn detection in the measuring groove 11 caused by the rotating sleeve 4 rotating during yarn movement. During the screwing of screw 33 into the stepped hole 32, the tip of screw 33 presses against the inclined surface of the isosceles trapezoidal strip 35. This causes the two isosceles trapezoidal strips 35 to slide along the slide groove 34 after pressing and move away from each other. Finally, the parts of the isosceles trapezoidal strips 35 that move away from each other contact the groove wall of the measuring groove 11 after sliding. The strip 35 increases the friction between the limiting seat 3 and the measuring groove 11, thus locking the limiting seat 3 in the measuring groove 11. To unlock, simply unscrew the screw 33 from the stepped hole 32. The unlocked limiting seat 3 can slide and move freely in the measuring groove 11. By moving the two limiting seats 3, the position of the yarn being measured in the measuring groove 11 can be changed. The length of the yarn being measured by the optical sensor can also be changed by changing the distance between the two limiting seats 3, thus meeting different needs. During maintenance, the limiting seat 3 can also be unlocked directly from the measuring groove 11, which is convenient for disassembly and maintenance, and also makes it easy for the yarn to pass back through the rotating sleeve 4, which is convenient for inspection and installation.The diameter of the middle part of the limiting roller 7 is smaller than the diameter of its ends, ensuring that the yarn remains in the middle position as it moves along the limiting roller 7. The operator tightens the set screw 73 in the threaded hole 72, which moves the marker pen 71 up and down. This ensures that the distance between the marker pen 71 and the outer wall of the middle part of the limiting roller 7 is equal to the upper limit of the yarn diameter. When the yarn diameter exceeds the threshold, the yarn comes into contact with the marker pen 71, and the marker pen 71 applies ink to the outer wall of the yarn. Ink application continues until the yarn diameter falls below the threshold, at which point the yarn moves away from the marker pen 71, and the marker pen 71 stops marking.

[0064] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description only, and are not intended to 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 limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be construed as indicating or implying relative importance.

[0065] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An optical sensor, comprising: Sensor body (1); a measuring groove (11) is formed by a recess in the middle of the sensor body (1); the yarn passes through the measuring groove (11) to achieve diameter measurement; Pin (2); the pin (2) is disposed at the bottom of the sensor body (1); The optical sensor is characterized in that it further includes: Limiting seat (3); the limiting seat (3) is fixedly connected to both ends of the measuring groove (11); A central hole (31) is provided through the middle of the limiting seat (3); Rotating sleeve (4); the rotating sleeve (4) is rotatably connected inside the central hole (31); Center rod (5); there are two center rods (5); the center rods (5) are arranged parallel to each other on the inner wall of the rotating sleeve (4); Rotating roller (6); the rotating roller (6) is rotatably connected to the corresponding central rod (5); The inner walls of both ends of the rotating sleeve (4) are rotatably connected to the rotating roller (6) via the central rod (5); one of the inner walls of the rotating sleeve (4) is provided with a groove (41); the groove (41) is located between the rotating rollers (6) at both ends of the rotating sleeve (4); a U-shaped plate (42) is slidably connected in the groove (41); the opening of the U-shaped plate (42) faces away from the bottom of the groove (41), and the U-shaped plate (42) and the bottom of the groove (41) are connected by a spring (43); an adjusting roller (44) is rotatably connected between the two ends of the U-shaped plate (42).

2. An optical sensor according to claim 1, characterized in that: The groove (41) is spirally distributed along the central axis of the rotating sleeve (4).

3. An optical sensor according to claim 2, characterized in that: The U-shaped plate (42) is slidably and sealed to the groove (41); a vent hole (45) is provided in the middle of the U-shaped plate (42); one end of the vent hole (45) faces the adjusting roller (44), and the other end communicates with the inside of the groove (41); the inside of the groove (41) is filled with talcum powder (46).

4. An optical sensor according to claim 3, characterized in that: The inner openings of the two rotating sleeves (4) are close to each other and are fixed to a flexible membrane (47); a circular groove (48) is provided in the center of the flexible membrane (47); an elastic ring (49) is fixed in the circular groove (48); the elastic ring (49) is sleeved on the outer wall of the yarn under the action of elastic force.

5. An optical sensor according to claim 1, characterized in that: A stepped hole (32) is provided between the upper end of the limiting seat (3) and the inner wall of the central hole (31); a screw (33) is threaded onto the inner wall of the stepped hole (32) with a smaller diameter.

6. An optical sensor according to claim 5, characterized in that: The inner wall of the stepped hole (32) with a larger diameter is symmetrically provided with a sliding groove (34); an isosceles trapezoidal strip (35) is slidably connected in the sliding groove (34); the parts of the isosceles trapezoidal strip (35) that are far apart from each other are elastic.

7. An optical sensor according to claim 1, characterized in that: Another rotating sleeve (4) is laterally rotatably connected to a limiting roller (7) on its upper inner wall; the yarn is laid on and passes over the limiting roller (7); a marker (71) is provided directly above the limiting roller (7); the rotating sleeve (4) is provided with a threaded hole (72) directly above the marker (71); the upper end of the threaded hole (72) passes through the limiting seat (3); a set screw (73) is threaded inside the threaded hole (72); the lower end of the marker (71) is fixedly connected to the set screw (73).

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