A filter-coupled detection device capable of multi-point detection

Abstract

The present invention discloses a filter coupling detection device capable of multi-point detection, which relates to the technical field of filter detection. It includes a frame, a shielding unit, a detection unit and a marking unit. The frame is used to install and fix the shielding unit, the detection unit and the marking unit. The shielding unit is used to shield the edge of the circular filter to be detected. The detection unit is used for simultaneous multi-point detection of the filter. The marking unit is used to mark the defective filter. When the filter is installed at the place to be detected, the shielding unit shields the edge of filters with different diameters to avoid possible phenomena such as reflection and scattering at the edge of the filter, so that the light transmittance at the edge is different from that in the central area, which may affect the detection result. The detection unit synchronously detects multiple points on the filter to improve the detection efficiency. When uneven defects are detected in a certain area of the filter, the marking unit marks the filter for subsequent classification.

Description

Technical Field

[0001] The present invention relates to the technical field of filter detection, and specifically, it is a filter coupling detection device that can perform multi-point detection. Background Art

[0002] With the continuous development of optical technology, filters are increasingly widely used in various fields, such as photography, optical instruments, medical devices, communications, etc. The performance of filters directly affects the optical performance and imaging quality of related devices. Therefore, it is crucial to accurately and efficiently detect filters.

[0003] Currently, the following problems exist in the detection of filters:

[0004] Traditional filter detection methods usually adopt single-point detection, that is, the optical performance is measured at a specific position of the filter. However, this method cannot comprehensively reflect the overall performance of the filter because there may be non-uniformities in the production process of the filter, and the optical performance at different positions may vary. For example, in some large filters or applications with high requirements for optical performance, single-point detection may ignore local defects or performance changes of the filter, resulting in misjudgment of the filter quality.

[0005] In the detection of the transmittance of filters, the edge region often has a greater impact on the detection result. There may be phenomena such as reflection and scattering at the edge of the filter, resulting in a difference in transmittance between the edge and the central region. Traditional detection methods usually do not effectively block or process the edge region, resulting in inaccurate transmittance detection results. This not only affects the accurate evaluation of the optical performance of the filter but also may lead to a decline in the performance of the optical system in actual applications.

[0006] When the filter has a defect of non-uniform transmittance, current detection methods often have difficulty quickly and accurately marking the defect. This makes it difficult to distinguish and process defective filters in subsequent production processes, increasing production costs and time. At the same time, the lack of an effective defect marking function is also not conducive to tracing and improving quality problems in the filter production process. Summary of the Invention

[0007] The purpose of the present invention is to provide a filter coupling detection device that can perform multi-point detection to solve the problems raised in the prior art.

[0008] To achieve the above purpose, the present invention provides the following technical solutions:

[0009] The described filter-coupled detection device capable of multi-point detection includes a frame, a detection unit, an occlusion unit, and a marking unit. The frame is placed on a horizontal base. A chute is provided on the frame. A vertical plate is provided on the surface of the end of the frame away from the horizontal base. The vertical plate and the frame are slidably installed in the chute. A circular through-hole is provided on the vertical plate. A clamping block is symmetrically rotatably installed in the circular through-hole with the horizontal axis as the center. A distance sensor is provided on the vertical plate. A thread is provided at the contact end of the clamping block and the vertical plate. The detection unit is fixedly installed on the surface of the end of the frame away from the horizontal base. The detection unit has the functions of multi-point detection of the filter and precise detection of defective filters with increased defects. The occlusion unit is fixedly installed on the surface of the end of the frame away from the horizontal base. The marking unit is fixedly connected to the frame. The marking unit has the function of marking defective filters.

[0010] The frame is used to install and fix the occlusion unit, the detection unit, and the marking unit. The occlusion unit is used to occlude the edge of the circular filter to be detected. The detection unit is used for simultaneous multi-point detection of the filter. The marking unit is used to mark defective filters. When the filter is installed at the detection position, the occlusion unit occludes the edge of filters with different diameters to avoid possible phenomena such as reflection and scattering at the edge of the filter, which may cause differences in the light transmittance between the edge and the central region and affect the detection result. The detection unit performs synchronous detection at multiple points on the filter to improve the detection efficiency. When uneven defects are detected in a certain area of the filter, the marking unit marks the filter for subsequent classification.

[0011] Further, the detection unit includes a first telescopic rod, a mounting box, a motor, a driving gear, a driven gear, a toothed ring, a connecting rod, a transmission plate, a buffer spring, a slider, a light source, a support cylinder, a photoresistor, a reflecting lens, a rotating column, a first memory spring and a second memory spring. The telescopic end of the first telescopic rod is fixedly connected to the vertical plate, and the fixed end of the first telescopic rod is fixedly connected to the mounting box. The mounting box is fixedly installed on the surface of one end of the frame away from the horizontal base. The fixed end of the motor is fixedly installed inside the mounting box, and the output end of the motor is fixedly connected to the driving gear. The driving gear is meshed with the driven gear. The driven gear is rotatably installed on the long rod at the fixed end of the motor. The driven gear is meshed with the toothed ring. The outer surface of the toothed ring is fixedly connected to the middle of the connecting rod. One end of the connecting rod is rotatably connected to the mounting box, and the other end is fixedly connected to the transmission plate. The transmission plate is provided with a rectangular groove. One end of the buffer spring is fixedly connected to the inner wall of the groove of the transmission plate away from the central axis, and the other end is fixedly connected to the slider. The slider is slidably installed in the groove of the transmission plate. The transmission plate is evenly provided with multiple groups of circular through holes along the groove. The light source is fixedly installed between the toothed ring and the transmission plate. An opaque soft film is arranged above the buffer spring. When the slider is parallel to the vertical axis, the number of circular through holes blocked by the lower slider is less than the number of circular through holes blocked by the upper slider. The support cylinder is fixedly installed at one end of the frame away from the horizontal base. The photoresistor is fixedly installed on the outer surface of the support cylinder near the motor. There are multiple reflecting lenses. The reflecting lenses are rotatably connected to the rotating column. A chute is provided on the inner surface of the support cylinder in the horizontal direction. Both ends of the rotating column are slidably connected to the chute of the support cylinder. One end of the first memory spring is fixedly connected to the inner wall of the support cylinder, and the other end is fixedly connected to the rotating column. One end of the second memory spring is fixedly connected to the inner wall of the support cylinder, and the other end is fixedly connected to the rotating column. The inner surface of the support cylinder near the horizontal base is evenly provided with sliding grooves. Each sliding groove is arranged at intervals below the rotating column. The rotating column connected to the first memory spring is slidably installed in the sliding groove of the support cylinder, and the rotating column connected to the second memory spring is slidably installed in the sliding groove of the support cylinder.

[0012] When the filter is placed on the clamping block, on the one hand, the external controller controls the motor to start, driving the driving gear to rotate. Under the driving action of the driven gear, the toothed ring rotates, and then under the driving action of the connecting rod, the transmission plate rotates synchronously. Under the action of centrifugal force, the slider squeezes the buffer spring, no longer blocking the circular through-hole, so that the light source emits through the circular through-hole and irradiates the filter. When the slider is in the vertical direction, the upper slider moves downward under the action of its own gravity and the restoring force of the buffer spring, blocking more circular through-holes in the lower part than the lower slider at this time. Therefore, when in the vertical direction, multi-point detection of the filter is realized, improving the detection efficiency of the filter. When it is necessary to detect the light transmittance of the next area of the filter, the controller increases the motor speed. Under the action of centrifugal force, the slider further compresses the buffer spring, reducing the number of blocked circular through-holes, thereby increasing the irradiation area. On the other hand, the external controller controls the telescopic rod one to expand and contract, thereby pushing the vertical plate to move until it moves to the optimal test distance and then performs the filter coupling detection, thus improving the efficiency of the filter coupling detection. When the photoresistor detects that the light intensity of the light source passing through the filter is lower than the set value, it is determined that the filter to be detected is a defective product. At this time, the photoresistor feeds back a signal to the controller. On the one hand, a certain current value is passed into the first memory spring, causing the first memory spring to contract a certain distance when electrified, thereby pulling the inner rotating column to move along the sliding groove towards the inner wall of the support cylinder. While pulling the adjacent rotating columns closer to each other, the adjacent reflecting lenses deflect symmetrically with the middle rotating column as the center, making the reflecting lenses form a 45-degree angle with the light source. On the other hand, the controller passes an equal amount of current value into the second memory spring, causing the second memory spring to expand a certain distance when electrified, so that the outer rotating column moves along the sliding groove towards the middle of the support cylinder. While pulling the adjacent rotating columns closer to each other, the adjacent reflecting lenses also deflect symmetrically with the rotating column as the center, making the outer reflecting lenses also form a 45-degree angle with the light source. Thus, when the light source enters the first reflecting lens, the light intensity of the defective filter is reduced through continuous reflections, thereby expanding the light intensity loss value, making it easier for the receiver to detect the light intensity difference of the defective product, and thus improving the detection accuracy of the receiver.

[0013] Further, the shielding unit includes a fixed cylinder, an inclined slide plate, a push block, a telescopic rod two, a return spring, an arc-shaped soft plate and a shielding cloth. The fixed cylinder is fixedly installed at one end of the vertical plate close to the detection unit. One end of the inclined slide plate is fixedly installed on the inner surface of the fixed cylinder. A shielding cloth is fixedly installed between two adjacent inclined slide plates. The fixed end of the telescopic rod two is installed on the inner surface of the fixed cylinder. The telescopic end of the telescopic rod two is slidably connected with the push block. The push block is fixedly connected with the return spring. The return spring is installed inside the arc-shaped soft plate. The arc-shaped soft plate is connected with the fixed cylinder through the shielding cloth.

[0014] After the filter is placed on the clamping block, by rotating the thread of the clamping block, the depth of the clamping block entering the vertical plate is changed, so as to adjust the clamping diameter, so as to adapt to the clamping of filters with different diameters. At this time, the distance sensor detects the distance from the bottom of the upper clamping block to the frame, and feeds it back to the controller. The controller controls the second telescopic rod to extend, so as to push the push block to compress the return spring and move along the inclined slide plate until it stops moving after moving to a set distance from the edge of the filter. At this time, the arc-shaped soft plate drives the shielding cloth to shield the edge of the filter, so as to avoid the phenomena of reflection and scattering of the light source at the edge of the filter when the light transmittance of the filter is detected, resulting in a difference in the light transmittance between the edge and the central area, and the light transmittance detection result is inaccurate, thereby improving the detection accuracy of filter coupling.

[0015] Further, the marking unit includes a third telescopic rod, a guide plate, a moving plate, a storage box, a magnetic block, a pull rope, a guide column, a winding tube, a stirring rod, a torsion spring, a spray tube, a guide post, a compression spring, a marking pen, a box body and a receiver. The box body is fixedly installed on the surface of one end of the frame away from the horizontal base. One end of the third telescopic rod is fixedly connected to the inner wall of the storage box away from the detection unit, and the other end is fixedly connected to the moving plate. The moving plate is provided with a rectangular through hole. A rectangular cavity is arranged directly above the rectangular through hole of the moving plate. The guide plate is slidably connected to the rectangular through hole of the moving plate. The guide plate is fixedly installed on the inner walls of both sides of the storage box parallel to the horizontal axis. The storage box is fixedly installed on the inner surface of one end of the box body away from the horizontal base. Red ink is stored inside the storage box. The magnetic block is installed in the rectangular cavity of the moving plate. One end of the pull rope is fixedly connected to the magnetic block, and the other end is fixedly connected to the winding tube after passing around the guide column. The winding tube is rotatably connected to the moving plate through a torsion spring. One end of the stirring rod is fixedly connected to the winding tube, and the other end extends out of the moving plate. The spray tube is communicated with the storage box. The guide posts are fixedly installed at both ends inside the spray tube parallel to the horizontal axis. One end of the compression spring is fixedly connected to the fixed ring on the left side of the spray tube, and the other end is fixedly connected to the marking pen. The marking pen is slidably installed inside the spray tube. The receiver is fixedly installed inside the box body.

[0016] When the receiver receives the light source signal passing through the filter, after analysis, when the light transmittance is lower than the set value, the receiver feeds back a signal to the controller. At this time, the controller controls the third telescopic rod to extend, thereby driving the moving plate to move along the guide plate and squeezing the internal red ink into the nozzle to wet the marker pen. As the moving plate continues to move, under the action of pressure, the ink pushes the marker pen to extend out of the nozzle along the direction of the guide post and contact the filter, so as to quickly mark the defective filter, facilitating the subsequent staff to distinguish and process the defective products. During the movement of the moving plate along the guide plate, when the magnet passes through the groove on the guide plate, under the attraction of the opposite polarity of the electromagnet and the magnet, the magnet is attracted to move upward, thereby stretching the pull rope. The pull rope pulls the winding tube along the guide post to compress the torsion spring and rotate, thereby driving the stirring rod to rotate and stirring the red ink inside the storage box, improving the fluidity of the red ink, avoiding ink viscosity, and preventing the situation where the marker pen cannot be impregnated with ink and the marker pen cannot extend, thus affecting the marking of the defective filter. When the magnet passes through the middle of the two grooves on the guide plate, under the combined action of the repulsive force of the same polarity of the electromagnet and the magnet and the self-restoring force of the torsion spring, the magnet is driven to move downward in cooperation with the pull rope, so that the winding tube drives the stirring rod to rotate synchronously, and the red ink inside the storage box is stirred again to jointly improve the fluidity of the red ink. When the marker pen finishes marking, the controller controls the third telescopic rod to contract, thereby pulling the moving plate to reset. During the movement of the moving plate, on the one hand, the magnet and the electromagnet on the guide plate interact to stir the red ink twice to improve the fluidity. On the other hand, the marker pen resets under the action of the self-restoring force of the compression spring and slides into the nozzle to impregnate the ink, preparing for the next marking.

[0017] Further, the material of the shielding cloth is opaque fabric.

[0018] In order to facilitate the shielding of the edge of the filter, avoid the occurrence of phenomena such as reflection and scattering caused by the light source irradiating the edge of the filter, thereby improving the accuracy of the light transmittance detection result.

[0019] Further, a plurality of groups of grooves are evenly arranged on the surface of the guide plate away from one end of the horizontal base. Electromagnets with the same magnetism as the magnet are arranged between adjacent grooves, and electromagnets with the opposite magnetism to the magnet are arranged inside the grooves.

[0020] In order to make the magnet move up and down under the action of the electromagnet during the movement of the moving plate on the guide plate, thereby driving the winding tube and the stirring rod to rotate synchronously to stir the red ink in the storage box, improving the fluidity of the ink, avoiding ink viscosity, and preventing the situation where the marker pen cannot be impregnated with ink and the marker pen cannot extend, thus affecting the marking of the defective filter.

[0021] Further, the torsion spring drives the winding tube to rotate by a maximum angle of 60 degrees, and the torsion spring is initially in a stretched state.

[0022] In order to enable the magnetic block to drive the stirring rod to rotate when passing through the electromagnet, causing the stirring rod to swing reciprocally in a large amplitude, improving the uniform stirring of the ink. Since the torsion spring is initially in a stretched state, it continuously exerts a restoring force on the winding tube, causing the winding tube to move reciprocally continuously. This dynamic stirring effect can effectively break the possible layering phenomenon in the ink, ensuring that the ink is fully stirred throughout the container and improving the fluidity of the ink.

[0023] Further, a heater is provided inside the nozzle.

[0024] To prevent the ink from caking in winter, the heater heats the red ink entering the nozzle, improving the fluidity of the ink and the marking effect of the marker pen.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. When in the vertical direction, in the present invention, the slider above in the detection unit moves downward under the action of its own gravity and the restoring force of the buffer spring, blocking more circular through-holes below than the circular through-holes blocked by the lower slider at this time, realizing the multi-point detection of the filter, improving the detection efficiency of the filter. When the photosensitive resistor detects that the light intensity of the light source passing through the filter is lower than the set value, a certain current value is passed into the first memory spring and the second memory spring, causing the first memory spring to contract while the second memory spring expands, so that the reflection mirror forms a 45-degree angle with the light source irradiation direction. The light intensity of the defective filter is reduced through the reflection of multiple reflection mirrors, thereby expanding the light intensity loss value, making it easier for the receiver to detect the light intensity difference of the defective product, and thus improving the detection accuracy of the receiver.

[0027] 2. In the present invention, the second telescopic rod in the shielding unit extends to push the push block to compress the return spring and move along the inclined slide plate, thereby driving the arc-shaped soft plate to drive the shielding cloth to shield the edge of the filter, avoiding the phenomena of reflection and scattering of the light source at the edge of the filter during the transmittance detection of the filter, resulting in a difference in the transmittance between the edge and the central region, and inaccurate transmittance detection results, thereby improving the detection accuracy of the filter coupling.

[0028] 3. When the magnetic block in the marking unit passes through the guide plate, under the action of the electromagnet and the magnetic block whose polarities change constantly, the magnetic block is driven to move up and down. Thus, under the action of the pulling rope, the winding tube is pulled to drive the stirring rod to stir the red ink, improving the fluidity of the red ink and preventing the ink from becoming viscous, which may cause the situation that the marking pen cannot be dipped in the ink and cannot be extended, affecting the marking of defective filter plates. At the same time, the moving plate moves along the guide plate and squeezes the internal red ink into the spray tube to moisten the marking pen. As the moving plate continues to move, under the action of pressure, the ink pushes the marking pen to extend out of the spray tube along the direction of the guide post and contact the filter plate, quickly marking the defective filter plate, facilitating the subsequent distinction and treatment of defective products by the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 FIG. is a schematic diagram of the overall external structure of a filter plate coupling detection device capable of multi-point detection according to the present invention;

[0030] Figure 2 FIG. is a front view structure schematic diagram of a filter plate coupling detection device capable of multi-point detection according to the present invention;

[0031] Figure 3 FIG. is a top view structure schematic diagram of a filter plate coupling detection device capable of multi-point detection according to the present invention;

[0032] Figure 4 FIG. is a sectional view structure schematic diagram of a filter plate coupling detection device capable of multi-point detection according to the present invention at A-A; Figure 3 in FIG.

[0033] Figure 5 FIG. is a schematic diagram of the internal structure of the installation box of a filter plate coupling detection device capable of multi-point detection according to the present invention;

[0034] Figure 6 FIG. is a schematic diagram of the installation positions of the driving gear, driven gear and gear ring of a filter plate coupling detection device capable of multi-point detection according to the present invention;

[0035] Figure 7 FIG. is a schematic diagram of the installation positions of the transmission plate, buffer spring and slider of a filter plate coupling detection device capable of multi-point detection according to the present invention;

[0036] Figure 8 FIG. is a schematic diagram of the installation positions of the fixed cylinder, shielding cloth and arc-shaped flexible plate of a filter plate coupling detection device capable of multi-point detection according to the present invention;

[0037] Figure 9 FIG. is a schematic diagram of the internal structure of the fixed cylinder of a filter plate coupling detection device capable of multi-point detection according to the present invention;

[0038] Figure 10 Schematic diagram of the installation position structure of the shielding unit part of a filter coupling detection device capable of multi-point detection according to the present invention;

[0039] Figure 11 Schematic diagram of the internal structure of the storage box of a filter coupling detection device capable of multi-point detection according to the present invention;

[0040] Figure 12 Schematic diagram of the internal structure of the moving plate of a filter coupling detection device capable of multi-point detection according to the present invention;

[0041] Figure 13 Schematic diagram of the internal structure of the support cylinder of a filter coupling detection device capable of multi-point detection according to the present invention, with the arrow representing the light source irradiation direction.

[0042] In the figure: 1, frame; 11, vertical plate; 12, clamping block; 2, detection unit; 21, first telescopic rod; 22, installation box; 23, motor; 24, driving gear; 25, driven gear; 26, gear ring; 27, connecting rod; 28, transmission plate; 29, buffer spring; 210, slider; 211, light source; 212, support cylinder; 213, photoresistor; 214, reflecting mirror; 215, rotating column; 216, first memory spring; 217, second memory spring; 3, shielding unit; 31, fixed cylinder; 32, inclined slide plate; 33, pushing block; 34, second telescopic rod; 35, reset spring; 36, arc-shaped flexible plate; 37, shielding cloth; 4, marking unit; 41, third telescopic rod; 42, guide plate; 43, moving plate; 44, storage box; 45, magnetic block; 46, pulling rope; 47, guide post; 48, winding tube; 49, stirring rod; 410, torsion spring; 411, spray pipe; 412, guide post; 413, compression spring; 414, marking pen; 415, box body; 416, receiver. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] Embodiment: As Figures 1 - 13 shown, the present invention provides a technical solution:

[0045] As Figure 1As shown in the figure, a filter-coupled detection device capable of multi-point detection includes a frame 1, a detection unit 2, a shielding unit 3, and a marking unit 4. The frame 1 is placed on a horizontal base. A chute is provided on the frame 1. A vertical plate 11 is provided on the surface of the frame 1 away from the horizontal base. The vertical plate 11 and the frame 1 are slidably installed in the chute. A circular through-hole is provided on the vertical plate 11. A clamping block 12 is symmetrically rotatably installed in the circular through-hole with the horizontal axis as the center. A distance sensor is provided on the vertical plate 11. A thread is provided at the contact end of the clamping block 12 and the vertical plate 11. The detection unit 2 is fixedly installed on the surface of the frame 1 away from the horizontal base. The detection unit 2 has the functions of multi-point detection of the filter and precise detection of defective filters. The shielding unit 3 is fixedly installed on the surface of the frame 1 away from the horizontal base. The marking unit 4 is fixedly connected to the frame 1. The marking unit 4 has the function of marking defective filters.

[0046] The frame 1 is used to install and fix the shielding unit 3, the detection unit 2, and the marking unit 4. The shielding unit 3 is used to shield the edge of the circular filter to be detected. The detection unit 2 is used for multi-point simultaneous detection of the filter. The marking unit 4 is used to mark defective filters. When the filter is installed at the place to be detected, the shielding unit 3 shields the edge of filters with different diameters to avoid possible phenomena such as reflection and scattering at the edge of the filter, so that the light transmittance at the edge is different from that in the central area, which affects the detection result. The detection unit 2 performs synchronous detection at multiple points on the filter to improve the detection efficiency. When uneven defects appear in a certain area of the filter, the marking unit 4 marks the filter for subsequent classification.

[0047] As Figure 2 , 3As shown in FIGS. 5, 6, 7, and 13, the detection unit 2 includes a first telescopic rod 21, a mounting box 22, a motor 23, a driving gear 24, a driven gear 25, a toothed ring 26, a connecting rod 27, a transmission plate 28, a buffer spring 29, a slider 210, a light source 211, a support cylinder 212, a photoresistor 213, a reflecting lens 214, a rotating column 215, a first memory spring 216, and a second memory spring 217. The telescopic end of the first telescopic rod 21 is fixedly connected to the vertical plate 11, and the fixed end of the first telescopic rod 21 is fixedly connected to the mounting box 22. The mounting box 22 is fixedly installed on the surface of one end of the frame 1 away from the horizontal base. The fixed end of the motor 23 is fixedly installed inside the mounting box 22, and the output end of the motor 23 is fixedly connected to the driving gear 24. The driving gear 24 is meshed with the driven gear 25. The driven gear 25 is rotatably installed on the long rod at the fixed end of the motor 23. The driven gear 25 is meshed with the toothed ring 26. The outer surface of the toothed ring 26 is fixedly connected to the middle of the connecting rod 27. One end of the connecting rod 27 is rotatably connected to the mounting box 22, and the other end is fixedly connected to the transmission plate 28. The transmission plate 28 is provided with a rectangular groove. One end of the buffer spring 29 is fixedly connected to the inner wall of the groove of the transmission plate 28 away from the central axis, and the other end is fixedly connected to the slider 210. The slider 210 is slidably installed in the groove of the transmission plate 28. The transmission plate 28 is evenly provided with multiple groups of circular through holes along the groove. The light source 211 is fixedly installed between the toothed ring 26 and the transmission plate 28. An opaque soft film is provided above the buffer spring 29. When the slider 210 is parallel to the vertical axis, the number of circular through holes blocked by the lower slider 210 is less than the number of circular through holes blocked by the upper slider 210. The support cylinder 212 is fixedly installed at one end of the frame 1 away from the horizontal base. The photoresistor 213 is fixedly installed on the outer surface of the support cylinder 212 near one end of the motor 23. There are multiple reflecting lenses 214. The reflecting lenses 214 are rotatably connected to the rotating column 215. A sliding groove is provided on the inner surface of the support cylinder 212 in the horizontal direction. Both ends of the rotating column 215 are slidably connected to the sliding groove of the support cylinder 212. One end of the first memory spring 216 is fixedly connected to the inner wall of the support cylinder 212, and the other end is fixedly connected to the rotating column 215. One end of the second memory spring 217 is fixedly connected to the inner wall of the support cylinder 212, and the other end is fixedly connected to the rotating column 215. The inner surface of the support cylinder 212 near one end of the horizontal base is evenly provided with sliding grooves. Each sliding groove is arranged at intervals below the rotating column 215. The rotating column 215 connected to the first memory spring 216 is slidably installed in the sliding groove of the support cylinder 212. The rotating column 215 connected to the second memory spring 217 is slidably installed in the sliding groove of the support cylinder 212.

[0048] When the filter is placed on the clamping block 12, on the one hand, the external controller controls the motor 23 to start, driving the driving gear 24 to rotate. Under the driving action of the driven gear 25, the toothed ring 26 rotates, and then under the driving action of the connecting rod 27, the transmission plate 28 rotates synchronously. Under the action of centrifugal force, the slider 210 presses the buffer spring 29, no longer blocking the circular through-hole, so that the light source 211 emits light from the circular through-hole and irradiates the filter. When the slider 210 is in the vertical direction, the upper slider 210 moves downward under the action of its own gravity and the restoring force of the buffer spring 29, blocking more circular through-holes in the lower part than the lower slider 210 at this time. Thus, when in the vertical direction, multi-point detection of the filter is realized, improving the detection efficiency of the filter. When it is necessary to detect the light transmittance of the next area of the filter, the controller increases the rotation speed of the motor 23. Under the action of centrifugal force, the slider 210 further compresses the buffer spring 29, reducing the number of blocked circular through-holes, thereby increasing the irradiation area. On the other hand, the external controller controls the telescopic rod 21 to extend and retract, thereby pushing the vertical plate 11 to move until it reaches the optimal test distance and then performing filter coupling detection, thus improving the efficiency of filter coupling detection. When the photosensitive resistor 213 detects that the light intensity of the light source 211 passing through the filter is lower than the set value, it is determined that the filter to be detected is a defective product. At this time, the photosensitive resistor 213 feeds back a signal to the controller. On the one hand, a certain current value is passed into the first memory spring 216, causing the first memory spring 216 to contract by a certain distance when energized, thereby pulling the inner rotating column 215 to move along the sliding groove towards the inner wall of the support cylinder 212. While pulling the adjacent rotating columns 215 closer to each other, the adjacent reflecting lenses 214 are symmetrically deflected with the middle rotating column 215 as the center, making the reflecting lens 214 form a 45-degree angle with the light source 211. On the other hand, the controller passes an equal amount of current value into the second memory spring 217, causing the second memory spring 217 to expand by a certain distance when energized, so that the outer rotating column 215 moves along the sliding groove towards the middle of the support cylinder 212. While pulling the adjacent rotating columns 215 closer to each other, the adjacent reflecting lenses 214 are also symmetrically deflected with the rotating column 215 as the center, making the outer reflecting lens 214 also form a 45-degree angle with the light source 211. Thus, when the light source 211 enters the first reflecting lens 214, the light intensity of the defective filter is reduced through continuous multiple reflections, thereby expanding the light intensity loss value, making it easier for the receiver 416 to detect the light intensity difference of the defective product, thus improving the detection accuracy of the receiver 416.

[0049] Such as Figure 4 、 8As shown in FIGS. 9 and 10, the shielding unit 3 includes a fixed cylinder 31, an inclined slide plate 32, a pushing block 33, a second telescopic rod 34, a return spring 35, an arc-shaped flexible plate 36 and a shielding cloth 37. The fixed cylinder 31 is fixedly installed at one end of the vertical plate 11 close to the detection unit 2. One end of the inclined slide plate 32 is fixedly installed on the inner surface of the fixed cylinder 31. A shielding cloth 37 is fixedly installed between two adjacent inclined slide plates 32. The fixed end of the second telescopic rod 34 is installed on the inner surface of the fixed cylinder 31. The telescopic end of the second telescopic rod 34 is slidably connected to the pushing block 33. The pushing block 33 is fixedly connected to the return spring 35. The return spring 35 is installed inside the arc-shaped flexible plate 36. The arc-shaped flexible plate 36 is connected to the fixed cylinder 31 through the shielding cloth 37.

[0050] After the filter is placed on the clamping block 12, by rotating the thread of the clamping block 12, the depth of the clamping block 12 entering the vertical plate 11 is changed, so as to adjust the clamping diameter to adapt to the clamping of filters with different diameters. At this time, the distance sensor detects the distance from the bottom of the upper clamping block 12 to the frame 1, and feeds it back to the controller. The controller controls the second telescopic rod 34 to extend, thereby pushing the pushing block 33 to compress the return spring 35 and move along the inclined slide plate 32 until it stops moving after moving to a set distance from the edge of the filter. At this time, the arc-shaped flexible plate 36 drives the shielding cloth 37 to shield the edge of the filter, so as to avoid the phenomena of reflection and scattering of the light source 211 at the edge of the filter during the light transmittance detection of the filter, resulting in a difference in the light transmittance between the edge and the central area, and inaccurate light transmittance detection results, thereby improving the detection accuracy of filter coupling.

[0051] As Figure 3 、 4As shown in FIGS. 11 and 12, the marking unit 4 includes a telescopic rod III 41, a guide plate 42, a moving plate 43, a storage box 44, a magnetic block 45, a pull rope 46, a guide post 47, a winding tube 48, a stirring rod 49, a torsion spring 410, a spray tube 411, a guide post 412, a compression spring 413, a marking pen 414, a box body 415 and a receiver 416. The box body 415 is fixedly installed on the surface of one end of the frame 1 away from the horizontal base. One end of the telescopic rod III 41 is fixedly connected to the inner wall of one end of the storage box 44 away from the detection unit 2, and the other end is fixedly connected to the moving plate 43. The moving plate 43 is provided with a rectangular through hole. A rectangular cavity is arranged directly above the rectangular through hole of the moving plate 43. The guide plate 42 is slidably connected to the rectangular through hole of the moving plate 43. The guide plate 42 is fixedly installed on the inner walls on both sides of the storage box 44 parallel to the horizontal axis. The storage box 44 is fixedly installed on the inner surface of one end of the box body 415 away from the horizontal base. The storage box 44 contains red ink inside. The magnetic block 45 is installed in the rectangular cavity of the moving plate 43. One end of the pull rope 46 is fixedly connected to the magnetic block 45, and the other end is fixedly connected to the winding tube 48 after passing around the guide post 47. The winding tube 48 is rotatably connected to the moving plate 43 through the torsion spring 410. One end of the stirring rod 49 is fixedly connected to the winding tube 48, and the other end extends out of the moving plate 43. The spray tube 411 is in conduction connection with the storage box 44. The guide post 412 is fixedly installed at both ends inside the spray tube 411 parallel to the horizontal axis. One end of the compression spring 413 is fixedly connected to the fixed ring on the left side of the spray tube 411, and the other end is fixedly connected to the marking pen 414. The marking pen 414 is slidably installed inside the spray tube 411. The receiver 416 is fixedly installed inside the box body 415.

[0052] When the receiver 416 receives the signal of the light source 211 passing through the filter and analyzes it, when the light transmittance is lower than the set value, the receiver 416 feeds back a signal to the controller. At this time, the controller controls the telescopic rod three 41 to extend, thereby driving the moving plate 43 to move along the guide plate 42 and squeezing the internal red ink into the nozzle 411 and wetting the marker 414. As the moving plate 43 continues to move, under the action of pressure, the ink pushes the marker 414 to extend out of the nozzle 411 along the direction of the guide post 412 and contact the filter, so as to quickly mark the defective filter, which is convenient for subsequent staff to distinguish and process defective products. During the process of the moving plate 43 moving along the guide plate 42, when the magnet 45 passes through the groove on the guide plate 42, under the attraction of the opposite polarity of the electromagnet and the magnet 45, the magnet 45 is attracted to move upward, thereby stretching the pull rope 46. The pull rope 46 pulls the winding tube 48 along the guide post 47 to compress the torsion spring 410 and rotate, thereby driving the stirring rod 49 to rotate and stirring the red ink inside the storage box 44 to improve the fluidity of the red ink and avoid the ink from being sticky, resulting in the situation that the marker 414 cannot be impregnated with ink and the marker 414 cannot extend, thus affecting the marking of the defective filter. When the magnet 45 passes through the middle of the two grooves on the guide plate 42, under the combined action of the repulsive force of the same polarity of the electromagnet and the magnet 45 and the self-restoring force of the torsion spring 410, and in cooperation with the pull rope 46, the magnet 45 moves downward, so that the winding tube 48 drives the stirring rod 49 to rotate synchronously, and stirs the red ink inside the storage box 44 again to jointly improve the fluidity of the red ink. When the marker 414 completes the marking, the controller controls the telescopic rod three 41 to contract, thereby pulling the moving plate 43 to reset. During the movement of the moving plate 43, on the one hand, the magnet 45 and the electromagnet on the guide plate 42 interact to stir the red ink for the second time to improve the fluidity. On the other hand, the marker 414 resets under the action of the self-restoring force of the compression spring 413 and slides into the nozzle 411 to impregnate the ink, preparing for the next marking.

[0053] As Figure 8 shown, the material of the shielding cloth 37 is opaque cloth.

[0054] In order to facilitate the shielding of the edge of the filter and avoid the occurrence of phenomena such as reflection and scattering caused by the light source 211 irradiating the edge of the filter, thereby improving the accuracy of the light transmittance detection result.

[0055] As Figure 11 shown, a plurality of groups of grooves are evenly arranged on the surface of the guide plate 42 far from one end of the horizontal base. An electromagnet with the same magnetism as the magnet 45 is arranged between adjacent grooves, and an electromagnet with the opposite magnetism to the magnet 45 is arranged inside the groove.

[0056] In order to make the magnetic block 45 move up and down under the action of the electromagnet during the movement of the moving plate 43 on the guide plate 42, so as to drive the coiling tube 48 and the stirring rod 49 to rotate synchronously to stir the red ink in the storage box 44, improve the fluidity of the ink, and avoid the ink from becoming sticky, resulting in the situation that the marker pen 414 cannot be impregnated with ink and the marker pen 414 cannot be extended, thus affecting the marking of defective filter plates.

[0057] As Figure 11 shown, the maximum rotation angle of the coiling tube 48 driven by the torsion spring 410 is 60 degrees, and the torsion spring 410 is initially in a stretched state.

[0058] In order to make the magnetic block 45 drive the stirring rod 49 to rotate when passing through the electromagnet, so that the stirring rod 49 makes large-amplitude reciprocating swings, improving the uniform stirring of the ink. Since the torsion spring 410 is initially in a stretched state, it will continuously apply a restoring force to the coiling tube 48, causing the coiling tube 48 to continuously perform reciprocating motions. This dynamic stirring effect can effectively break the possible layering phenomenon in the ink, ensure that the ink is fully stirred throughout the container, and improve the fluidity of the ink.

[0059] As Figure 11 shown, a heater is provided inside the spray pipe 411.

[0060] In order to prevent the ink from caking in winter, the heater heats the red ink entering the spray pipe 411, improving the fluidity of the ink and the marking effect of the marker pen 414.

[0061] The working principle of the present invention:

[0062] After the filter plate is placed on the clamping block 12, by rotating the thread of the clamping block 12, the depth of the clamping block 12 entering the vertical plate 11 is changed, so as to adjust the clamping diameter to adapt to the clamping of filter plates of different diameters. At this time, the distance sensor detects the distance from the bottom of the upper clamping block 12 to the frame 1, and feeds it back to the controller. The controller controls the second telescopic rod 34 to extend, thereby pushing the push block 33 to compress the return spring 35 and move along the inclined slide plate 32 until it stops moving after reaching the set distance from the edge of the filter plate. At this time, the arc-shaped flexible plate 36 drives the shielding cloth 37 to shield the edge of the filter plate, so as to avoid the phenomena of reflection and scattering of the light source 211 at the edge of the filter plate during the light transmittance detection of the filter plate, resulting in a difference in the light transmittance between the edge and the central region and inaccurate light transmittance detection results, thereby improving the detection accuracy of filter plate coupling.

[0063] On the one hand, an external controller controls the start of the motor 23, thereby driving the rotation of the driving gear 24. Under the transmission action of the driven gear 25, the ring gear 26 is driven to rotate. Thereby, under the transmission action of the connecting rod 27, the transmissive plate 28 is driven to rotate synchronously. Under the action of centrifugal force, the slider 210 is driven to squeeze the buffer spring 29, so that the circular through-hole is no longer blocked, and the light source 211 is transmitted through the circular through-hole and irradiates the filter. When the slider 210 is in the vertical direction, the upper slider 210 moves downward under the action of its own gravity and the restoring force of the buffer spring 29, blocking more circular through-holes below than the circular through-holes blocked by the lower slider 210 at this time. Thus, when in the vertical direction, the multi-point position detection of the filter is realized, and the detection efficiency of the filter is improved. When it is necessary to detect the light transmittance of the next area of the filter, the controller increases the rotation speed of the motor 23. Under the action of centrifugal force, the slider 210 further compresses the buffer spring 29, reducing the number of blocked circular through-holes, thereby increasing the irradiation area. On the other hand, the external controller controls the telescopic rod 21 to extend and retract, thereby pushing the vertical plate 11 to move until it moves to the optimal test distance and then performs the filter coupling detection, thereby improving the efficiency of the filter coupling detection. When the photosensitive resistor 213 detects that the light intensity of the light source 211 passing through the filter is lower than the set value, it is determined that the filter to be detected is a defective product. At this time, the photosensitive resistor 213 feeds back a signal to the controller. On the one hand, a certain current value is passed into the first memory spring 216, so that the first memory spring 216 contracts by a certain distance when electrified, thereby pulling the inner rotating column 215 to move along the sliding groove towards the inner wall of the support cylinder 212. While pulling the adjacent rotating columns 215 closer to each other, the adjacent reflecting lenses 214 are symmetrically deflected with the middle rotating column 215 as the center, so that the reflecting lens 214 forms a 45-degree angle with the light source 211. On the other hand, the controller passes an equal amount of current value into the second memory spring 217, so that the second memory spring 217 expands by a certain distance when electrified, thereby causing the outer rotating column 215 to move along the sliding groove towards the middle of the support cylinder 212. While pulling the adjacent rotating columns 215 closer to each other, the adjacent reflecting lenses 214 are also symmetrically deflected with the rotating column 215 as the center, so that the outer reflecting lens 214 also forms a 45-degree angle with the light source 211. Thus, when the light source 211 enters the first reflecting lens 214, the light intensity of the defective filter is reduced through continuous multiple reflections, thereby expanding the light intensity loss value, making it easier for the receiver 416 to detect the light intensity difference of the defective product, and thus improving the detection accuracy of the receiver 416.

[0064] When the receiver 416 receives the signal of the light source 211 passing through the filter, after analysis, when the light transmittance is lower than the set value, the receiver 416 feeds back a signal to the controller. At this time, the controller controls the telescopic rod three 41 to extend, thereby driving the moving plate 43 to move along the guide plate 42 and squeezing the internal red ink into the nozzle 411 and wetting the marker 414. As the moving plate 43 continues to move, under the action of pressure, the ink pushes the marker 414 to extend out of the nozzle 411 along the direction of the guide post 412 and contact the filter, so as to quickly mark the defective filter, which is convenient for subsequent staff to distinguish and process defective products. During the movement of the moving plate 43 along the guide plate 42, when the magnet 45 passes through the groove on the guide plate 42, under the attraction of the opposite polarity of the electromagnet and the magnet 45, the magnet 45 is attracted to move upward, thereby stretching the pull rope 46. The pull rope 46 pulls the winding tube 48 along the guide post 47 to compress the torsion spring 410 and rotate, thereby driving the stirring rod 49 to rotate and stirring the red ink inside the storage box 44 to improve the fluidity of the red ink and avoid the ink from being viscous, resulting in the situation that the marker 414 cannot be impregnated with ink and the marker 414 cannot extend, thus affecting the marking of the defective filter. When the magnet 45 passes through the middle of the two grooves on the guide plate 42, under the combined action of the repulsive force of the same polarity of the electromagnet and the magnet 45 and the self-restoring force of the torsion spring 410, the magnet 45 is driven to move downward in cooperation with the pull rope 46, so that the winding tube 48 drives the stirring rod 49 to rotate synchronously, and the red ink inside the storage box 44 is stirred again to jointly improve the fluidity of the red ink. When the marker 414 finishes marking, the controller controls the telescopic rod three 41 to contract, thereby pulling the moving plate 43 to reset. During the movement of the moving plate 43, on the one hand, the magnet 45 interacts with the electromagnet on the guide plate 42 to stir the red ink for the second time to improve the fluidity; on the other hand, the marker 414 resets under the action of the self-restoring force of the compression spring 413 and slides into the nozzle 411 to be impregnated with ink, preparing for the next marking.

[0065] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A filter coupling detection device capable of multi-point detection, characterized in that: A filter coupling detection device capable of multi-point detection comprises a frame (1), a detection unit (2), a shielding unit (3) and a marking unit (4), wherein the frame (1) is placed on a horizontal base, a slide groove is arranged on the frame (1), a vertical plate (11) is arranged on the surface of one end of the frame (1) away from the horizontal base, the vertical plate (11) is slidably mounted in the slide groove on the frame (1), a circular through hole is opened on the vertical plate (11), a clamping block (12) is axially symmetrically mounted in the circular through hole with a horizontal axis as the center, a distance sensor is arranged on the vertical plate (11), and a thread is arranged at the contact end of the clamping block (12) and the vertical plate (11), the detection unit (2) is fixedly mounted on the surface of one end of the frame (1) away from the horizontal base, and the detection unit (2) having the function of multi-point detection of optical filters and increasing the precision detection of defective optical filters, the detection unit (2) comprising a telescopic rod (21), a mounting box (22), a motor (23), a driving gear (24), a driven gear (25), a gear ring (26), a connecting rod (27), a transmission plate (28), a buffer spring (29), a slider (210), a light source (211), a support tube (212), a photoresistor (213), a reflective lens (214), a rotating column (215), a first memory spring (216) and a second memory spring (217), the shielding unit (3) being fixedly mounted on a surface of an end of the frame (1) away from a horizontal base, the marking unit (4) being fixedly connected to the frame (1), and the marking unit (4) having the function of marking defective optical filters; The shielding unit (3) comprises a fixed cylinder (31), an inclined slide plate (32), a push block (33), a second telescopic rod (34), a return spring (35), an arc-shaped soft plate (36) and a shielding cloth (37); the fixed cylinder (31) is fixedly mounted on one end of the vertical plate (11) close to the detection unit (2); one end of the inclined slide plate (32) is fixedly mounted on the inner surface of the fixed cylinder (31); two adjacent inclined slide plates (32) are fixedly mounted with a shielding cloth (37); the fixed end of the second telescopic rod (34) is mounted on the inner surface of the fixed cylinder (31); the telescopic end of the second telescopic rod (34) is slidably connected to the push block (33); the push block (33) is fixedly connected to the return spring (35); the return spring (35) is mounted inside the arc-shaped soft plate (36); and the arc-shaped soft plate (36) is connected to the fixed cylinder (31) via the shielding cloth (37); The marking unit (4) comprises a telescopic rod (41), a guide plate (42), a movable plate (43), a storage box (44), a magnetic block (45), a pull rope (46), a guide column (47), a reel (48), a stirring rod (49), a torsion spring (410), a nozzle (411), a guide column (412), a compression spring (413), a marking pen (414), a box (415) and a receiver (416), wherein the box (415) is fixedly mounted on the frame (1) away from the horizontal foundation. The telescopic rod (41) is fixedly connected to the inner wall of the receiving box (44) at one end away from the detection unit (2), and the other end is fixedly connected to the moving plate (43). The moving plate (43) is provided with a rectangular through hole. A rectangular cavity is provided directly above the rectangular through hole of the moving plate (43). The guide plate (42) is slidably connected to the rectangular through hole of the moving plate (43). The guide plate (42) is fixedly mounted on the inner walls of both sides of the receiving box (44) parallel to the horizontal axis. The receiving box (44) is provided with a plurality of movable plates (43). ) is fixedly mounted on the inner surface of one end of the box body (415) away from the horizontal base, the containing box (44) contains red ink, the magnetic block (45) is installed in the rectangular cavity of the movable plate (43), one end of the pull rope (46) is fixedly connected to the magnetic block (45), and the other end is fixedly connected to the winding tube (48) by bypassing the guide column (47), and the winding tube (48) is rotatably connected to the movable plate (43) through the torsion spring (410), and one end of the stirring rod (49) is fixedly connected to the winding tube (48). The nozzle (411) is electrically connected to the containing box (44), the guide column (412) is fixedly mounted at both ends of the nozzle (411) parallel to the horizontal axis, one end of the compression spring (413) is fixedly connected to the fixing ring on the left side of the nozzle (411), and the other end is fixedly connected to the marking pen (414), the marking pen (414) is slidably mounted inside the nozzle (411), and the receiver (416) is fixedly mounted inside the box (415).

2. The filter coupling detection device capable of multi-point detection according to claim 1, characterized in that: The telescopic end of the telescopic rod (21) is fixedly connected to the vertical plate (11), the fixed end of the telescopic rod (21) is fixedly connected to the installation box (22), the installation box (22) is fixedly mounted on the surface of one end of the frame (1) away from the horizontal foundation, the fixed end of the motor (23) is fixedly mounted inside the installation box (22), the output end of the motor (23) is fixedly connected to the driving gear (24), the driving gear (24) is meshingly connected to the driven gear (25), the driven gear (25) is rotatably mounted on the long rod at the fixed end of the motor (23), the driven gear (25) is meshingly connected to the gear ring (26), the outer surface of the gear ring (26) The connecting rod (27) is fixedly connected to the middle part of the connecting rod (27); one end of the connecting rod (27) is rotatably connected to the installation box (22); the other end is fixedly connected to the transmission plate (28); the transmission plate (28) is provided with a rectangular groove; one end of the buffer spring (29) is fixedly connected to the inner wall of the groove of the transmission plate (28) away from the central axis; the other end is fixedly connected to the slider (210); the transmission plate (28) is provided with a plurality of groups of circular through holes evenly along the groove; the light source (211) is fixedly installed between the gear ring (26) and the transmission plate (28); an opaque soft film is provided above the buffer spring (29); when the slider (210) is parallel to the vertical axis, The number of circular through holes blocked by the lower slider (210) is less than the number of circular through holes blocked by the upper slider (210); the support tube (212) is fixedly mounted on an end of the frame (1) away from the horizontal base; the photoresistor (213) is fixedly mounted on the outer surface of the support tube (212) at an end close to the motor (23); there are a plurality of reflective lenses (214); the reflective lenses (214) are rotatably connected to the rotating column (215); a sliding groove is provided on the inner surface of the support tube (212) in the horizontal direction; two ends of the rotating column (215) are slidably connected to the sliding groove of the support tube (212); one end of the first memory spring (216) is connected to the rotating column (215); The support tube (212) is fixedly connected to the inner wall, and the other end is fixedly connected to the rotating column (215); one end of the second memory spring (217) is fixedly connected to the inner wall of the support tube (212), and the other end is fixedly connected to the rotating column (215); the inner surface of one end of the support tube (212) close to the horizontal base is evenly provided with sliding grooves, and each sliding groove is arranged at intervals below the rotating column (215); the rotating column (215) connected to the first memory spring (216) is slidably installed in the sliding groove of the support tube (212), and the rotating column (215) connected to the second memory spring (217) is slidably installed in the sliding groove of the support tube (212).

3. The filter coupling detection device capable of multi-point detection according to claim 1, characterized in that: The shielding cloth (37) is made of opaque cloth.

4. The filter coupling detection device capable of multi-point detection according to claim 1, characterized in that: The surface of one end of the guide plate (42) away from the horizontal base is evenly provided with a plurality of groups of grooves, an electromagnet having the same magnetic property as the magnetic block (45) is arranged between adjacent grooves, and an electromagnet having the opposite magnetic property to the magnetic block (45) is arranged inside the groove.

5. The filter coupling detection device capable of multi-point detection according to claim 1, characterized in that: The torsion spring (410) drives the reel tube (48) to rotate to a maximum angle of 60 degrees, and the torsion spring (410) is initially in a stretched state.

6. The filter coupling detection device capable of multi-point detection according to claim 1, characterized in that: A heater is arranged inside the nozzle (411).

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