A pencil lead size detection device based on intelligent sensor

Abstract

The application relates to a pencil core size detection equipment based on an intelligent sensor, and belongs to the technical field of pencil core size measurement. The application adopts three-stage diameter measurement sensor optical detection, cooperates with double-layer sub-bin subdivision of the screening barrel, realizes coarse division to fine division, initial inspection to re-inspection and final inspection of the pencil, is favorable for recognizing diameter deviation and rapidly performing size detection; and the cylinder one and the cylinder two cooperatively realize quantitative feeding, and prevent the pencil from being accumulated, blocked, spilled and thrown out.

Description

Technical Field

[0001] This invention relates to the field of pencil lead size measurement technology, and in particular to a pencil lead size detection device based on a smart sensor. Background Technology

[0002] Non-contact optical diameter sensors are devices that achieve high-precision measurement of outer diameter based on the principle of parallel light occlusion imaging or laser scanning. They do not require contact with the object being measured. By emitting a stable parallel light source, when a cylindrical workpiece such as a pencil passes through the detection area, it blocks part of the light. The receiver collects the shadow width in real time and converts it into a precise diameter value using an algorithm. They offer advantages such as high measurement accuracy, fast response speed, no wear, and no damage to the workpiece surface. The measurement range typically covers 0–10mm, perfectly adapting to the detection of pencil shafts and leads. Linear accuracy can reach ±0.001–0.005mm, and the high sampling frequency meets the high-speed online detection requirements of production lines. They can also simultaneously measure parameters such as ellipticity, radial runout, and taper. They have strong anti-dust interference capabilities, stable and reliable operation, and can directly output analog, digital, or Ethernet signals to connect to PLCs and displays, enabling out-of-tolerance alarms, automatic sorting, and data recording. They are a core component for diameter detection and quality control in pencil processing production lines. The dimensional accuracy of pencil leads, such as diameter, straightness, and cross-sectional integrity, directly determines product quality. Currently, there are still significant shortcomings in dimensional inspection and sorting within the industry. Traditional manual visual inspection and simple mechanical sieves can only perform rough screening, resulting in low accuracy, poor efficiency, and high rates of false positives and false negatives. While existing photo-based visual inspection and measurement equipment has achieved preliminary automation, it is easily affected by dust, lighting, and workpiece posture, resulting in insufficient measurement stability. Furthermore, it lacks three-level verification, compartmentalized subdivision, and online dust removal functions, making it prone to material accumulation and blockage during loading. Qualified and unqualified products are easily mixed, making it difficult to form a closed-loop quality control system and meet the demands of large-scale, high-precision, and high-stability automated inspection and production of pencil leads. Summary of the Invention

[0003] The technical problem to be solved by this invention is to provide a solution to the problems of existing pencil lead size detection methods that rely on manual labor and coarse screening, resulting in low accuracy; photographic measurement is easily interfered with, lacks three-level verification and dust removal, and is prone to clogging and mixing during feeding, making it difficult to meet the requirements of high-precision automated production.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A pencil lead size detection device based on intelligent sensors includes a conveyor belt, a support frame mounted on the top of one side of the conveyor belt, a screening box mounted at the middle of the top of the conveyor belt, a feeding box mounted on the top of the support frame, a blocking block mounted on the bottom of the feeding box near the screening box, a cylinder mounted on the bottom of the blocking block, and the cylinder fixedly connected to the support frame. A feeding channel is installed inside the screening box near the feeding box, the feeding channel contacting the blocking block on the side near the feeding box, a top plate mounted at the bottom of the feeding channel, and a cylinder mounted on the top of the top plate away from the feeding box, the output end of the cylinder fixedly connected to the bottom of the feeding channel. A fan is installed at the end of the screening box. A screening component is installed inside the screening box, which is used to complete the pencil lead size detection step and preliminary grading. A feeding component is installed at the bottom of the screening component, which is used to separate and directionally discharge qualified and unqualified products.

[0005] Optionally, the screening component includes a servo motor, which is installed on the outer wall of the end of the screening box. A rotating rod is installed at the output end of the servo motor, and three sets of primary screening barrels are installed on the outer wall of the rotating rod away from the servo motor. The two ends of the primary screening barrels are made of filter screen material.

[0006] Optionally, a servo motor 2 is installed at the front end of the primary screening barrel, and a multi-group screening plate 1 is installed at the output end of the servo motor 2.

[0007] Optionally, an arc-shaped plate is rotatably connected to the top of the primary screening barrel, and the rotation angle of the arc-shaped plate is controlled by a rotating motor. An arc-shaped plate is rotatably connected to the bottom of the primary screening barrel, and the rotation angle of the arc-shaped plate is controlled by a rotating motor. A diameter measuring sensor is installed on one side of the primary screening barrel, and the probe of the diameter measuring sensor is aligned with the front end of the primary screening barrel.

[0008] Optionally, a connecting box is installed at the bottom of the primary screening barrel, and a secondary screening barrel is installed inside the connecting box. Both ends of the secondary screening barrel are made of filter screen material, and a servo motor is installed at the front end of the secondary screening barrel. Multiple screening plates are installed at the output end of the servo motor.

[0009] Optionally, an arc-shaped plate three is rotatably connected to the bottom of the secondary screening barrel. The rotation angle of the arc-shaped plate three is controlled by a rotating motor. A diameter measuring sensor two is installed on one side of the connecting box, and the probe of the diameter measuring sensor two is aligned with the front end of the secondary screening barrel.

[0010] Optionally, the feeding assembly includes a screening box, the top of which is fixed to the bottom of the connecting box, and multiple sets of rotating plates are installed inside the screening box. The rotating plates are rotatably connected to the inner wall of the screening box via torsion springs.

[0011] Optionally, the inner wall of the end of the screening box is provided with multiple sets of electric push rods, the electric push rods are fixed to the inner wall of the screening box, and the output end of the electric push rods is equipped with a push plate.

[0012] Optionally, a diameter measuring sensor three is installed on the inner wall of the front end of the screening box, the probe of the diameter measuring sensor three is aligned with the screening box, and a rotating channel is provided at the front end of the screening box, with a micro motor installed at the front end of the rotating channel near the feed box.

[0013] Optionally, the rotating channel is provided with a discharge channel on the side away from the feed box, and a discharge box is provided on the top of the discharge channel, with two sets of rubber plates installed inside the discharge box.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: In the above solution, a three-stage optical inspection process using diameter sensor 1, diameter sensor 2, and diameter sensor 3, combined with a double-layered compartmentalized subdivision system in primary and secondary sieving barrels, achieves a closed-loop verification of the entire process from coarse to fine separation of pencils, from initial inspection to re-inspection and finally to inspection. This facilitates the identification of dimensional defects such as diameter deviation, length abnormalities, bending deformation, and cross-sectional defects, reducing the probability of false detection, missed detection, and misclassification. Non-conforming products are located at the single-compartment level, and quality control standards are unified and quantifiable. From material feeding and control, compartmentalized feeding, optical inspection, dust removal and cleaning, grading and diversion, to the directional discharge of qualified / unconforming products, the entire process requires no manual operation or sorting. The equipment can operate continuously and stably, and the detection volume per unit time far exceeds that of manual and semi-automatic equipment. The three sets of primary sieving barrels circulate and switch stations, with feeding, inspection, dust removal, and unloading occurring simultaneously and in parallel, eliminating idle time and improving equipment utilization and production efficiency.

[0015] Quantitative feeding is achieved through the coordinated operation of cylinders one and two, eliminating pencil accumulation, blockage, spillage, and ejection. The filter material of the sieving barrel is both light-transmitting and gentle on the skin, while the feed box has a built-in rubber buffer structure, significantly reducing the risk of bumps, scratches, and breakage during discharge, protecting the appearance and dimensional accuracy of the pencils, and reducing defective product loss and raw material waste. The enclosed screening box design isolates external dust, debris, and light interference, providing a constant and stable operating environment for optical inspection. A fan blows air onto the sieving barrel and pencils in real time to remove surface debris and dust, ensuring the measurement accuracy of the non-contact optical diameter sensor, avoiding measurement errors caused by debris and dust, and improving the long-term continuous operation stability of the equipment.

[0016] Modular assembly of various functional components makes workstation switching, component replacement, and troubleshooting convenient and efficient. The screening plate, screening barrel, and feeding channel can be quickly adjusted to accommodate pencils of different diameters and lengths, improving the equipment's versatility and flexibility. It can adapt to the production needs of multiple product categories without major modifications. The feeding component adopts a combination mechanism of rotating plate diversion, electric push rod directional pushing, and rotating channel flipping discharge. Qualified and unqualified products are physically separated, discharged in a directional manner, and transported in zones, avoiding mixing problems at the source and facilitating subsequent packaging, rework, and scrap disposal. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of a pencil lead size detection device based on intelligent sensors; Figure 2 This is a cross-sectional diagram of a pencil lead size detection device based on intelligent sensors. Figure 3 A cross-sectional structural diagram showing the support frame, screening box, feed box, block, cylinder one, feed channel, top plate, and cylinder two. Figure 4 A schematic diagram of the cross-sectional structure of the conveyor belt, fan, screening box, feed channel, top plate, screening assembly and discharge assembly; Figure 5 A schematic diagram of the cross-sectional structure of the servo motor, screening box, feed channel, rotating rod, primary screening barrel, connecting box, screening box, electric push rod and rotating channel; Figure 6 This is a schematic diagram of the structure of the rotating rod, primary screening barrel, servo motor II, arc plate I, diameter sensor I, connecting box, secondary screening barrel, servo motor III, screening plate II, arc plate III, and diameter sensor II. Figure 7 A schematic diagram showing the disassembled cross-sectional structure of the primary screening barrel, servo motor 2, screening plate 1, arc plate 1, arc plate 2, diameter sensor 1, connecting box, secondary screening barrel, servo motor 3, screening plate 2, arc plate 3, and diameter sensor 2. Figure 8 A cross-sectional structural diagram showing the connecting box, secondary screening barrel, servo motor III, screening plate II, arc plate III, diameter measuring sensor II, screening box, rotating plate, electric push rod, diameter measuring sensor III, rotating channel, and micro motor. Figure 9 A cross-sectional structural diagram showing the electric push rod, push plate, screening box, and rotating plate; Figure 10 This is a schematic diagram of the equipment's material feeding and operating status. Figure 11 for Figure 10 Partial enlarged cross-sectional structural diagram.

[0018] Figure label: 100. Conveyor belt; 101. Support frame; 102. Screening box; 103. Feed box; 104. Block; 105. Cylinder 1; 106. Feed channel; 107. Top plate; 108. Cylinder 2; 109. Fan; 110. Screening assembly; 111. Servo motor 1; 112. Rotating rod; 113. Primary screening barrel; 114. Servo motor 2; 115. Screening plate 1; 116. Arc plate 1; 117. Arc plate 2; 118. Measuring... 119. Diameter sensor 1; 120. Connecting box; 121. Secondary screening barrel; 122. Servo motor 3; 123. Screening plate 2; 124. Arc plate 3; 125. Diameter sensor 2; 136. Feeding assembly; 137. Screening box; 138. Rotating plate; 139. Electric push rod; 130. Push plate; 131. Diameter sensor 3; 131. Rotating channel; 132. Micro motor; 133. Feeding channel; 134. Feeding box; 145. Rubber plate. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0020] like Figures 1 to 11As shown, an embodiment of the present invention provides a pencil lead size detection device based on intelligent sensors, including a conveyor belt 100, which is supported by a frame. A separator is provided at the front end of the belt to effectively separate defective and qualified products, preventing mixing and achieving continuous and stable pencil conveying. A support frame 101 is installed on the top of one side of the conveyor belt 100, and the support frame 101 is bolted to the frame to ensure structural stability during the feeding process. A screening box 102 is installed at the top center of the conveyor belt 100, and the screening box 102 is also rigidly connected to the frame by bolts to form a closed detection area. To minimize interference from external dust and debris with testing accuracy, a feeding box 103 is installed on top of the support frame 101. The feeding box 103 has a funnel-shaped feeding port at its top and an inclined guiding structure inside to ensure pencils can slide smoothly under their own weight and enter subsequent testing stations in an orderly manner. A blocking block 104 is installed at the bottom of the feeding box 103 near the screening box 102. A cylinder 105 is installed at the bottom of the blocking block 104. The extension and retraction of the cylinder 105 moves the blocking block 104 up and down, controlling the opening and closing of the feeding channel and preventing pencils from accumulating and overflowing in the primary screening barrel 113. The cylinder 105 and the support frame... 101 is fixedly connected. The feed channel 106 serves as a pencil guide, ensuring that pencils enter the primary screening barrel 113 in a single, orderly manner. The end of the feed channel 106 closest to the feed box 103 is sealed to the block 104. A top plate 107 is installed at the bottom of the feed channel 106. A cylinder 108 is installed on the top of the top plate 107 on the side furthest from the feed box 103. The output end of the cylinder 108 is fixedly connected to the bottom of the feed channel 106. The end of the feed channel 106 closest to the cylinder 108 is made of a flexible, wear-resistant material. When the cylinder 108 lifts, it can raise the end of the feed channel 106, blocking the flow of material during the replacement of the primary screening barrel 113. To prevent pencil spillage, a fan 109 is installed at the end of the screening box 102. When the servo motor 111 drives the primary screening barrel 113 to rotate to the horizontal position of the fan 109, it can blow air to remove dust from the inside of the primary screening barrel 113, removing pencil debris and dust, and improving the clarity of optical detection. A screening component 110 is installed inside the screening box 102. The screening component 110 is used to complete the detection step and preliminary grading of the pencil lead size. A feeding component 130 is installed at the bottom of the screening component 110. The feeding component 130 is used to separate qualified and unqualified products and discharge them in a directional manner.

[0021] like Figures 1 to 11As shown, the screening component 110 includes a servo motor 111, which is mounted on the outer wall of the end of the screening box 102. A rotating rod 112 is mounted on the output end of the servo motor 111. Three sets of primary screening barrels 113 are mounted on the outer wall of the end of the rotating rod 112 away from the servo motor 111. The three sets of primary screening barrels 113 are circumferentially distributed and can switch positions by rotating the servo motor 111 to complete the feeding, detection, dust removal, and unloading actions in sequence. The two ends of the primary screening barrels 113 are made of high-transmittance filter material, which not only ensures the measurement optical accuracy of the diameter sensor 118, but also facilitates the airflow of the fan 109 to pass through for dust removal. A servo motor 2 is mounted on the front end of the primary screening barrels 113. 114. Servo motor 114 has a multi-section sieve plate 115 installed at its output end. The sieve plate 115 divides the inner cavity of the primary sieve barrel 113 into multiple independent compartments, and the front end of the sieve plate 115 is marked with a numerical code to facilitate the vision system in locating the compartment where the defective product is located. Servo motor 114 can drive the sieve plate 115 to rotate, turning the compartment where the defective product is located to the discharge position. The top of the primary sieve barrel 113 is rotatably connected to an arc plate 116. The rotation angle of the arc plate 116 is controlled by a rotating motor. When the arc plate 116 is closed, it can prevent pencils from being thrown out during the rotation of the primary sieve barrel 113. The bottom of the primary sieve barrel 113 is rotatably connected to an arc plate. The second arc-shaped plate 117 rotates at an angle controlled by a rotating motor. When the arc-shaped plate 117 opens, the pencils in the corresponding compartment fall into the secondary sieving bin 120 below. A diameter sensor 118 is installed on one side of the primary sieving bin 113. The probe of the diameter sensor 118 is aligned with the front end of the primary sieving bin 113 to detect the diameter of the pencils in real time and transmit the data to the background control system, completing the first intelligent detection of the pencil lead size. A connecting box 119 is installed at the bottom of the primary sieving bin 113 to support the secondary sieving bin 120. The secondary sieving bin 120 is installed inside the connecting box 119, and the two ends of the secondary sieving bin 120 are filter screens. The material ensures unobstructed optical detection. A servo motor 3 121 is installed at the front end of the secondary screening barrel 120. The output end of the servo motor 3 121 is equipped with a multi-group screening plate 2 122, which further subdivides the pencils that fall from the primary screening, thus reducing the range of defective products. An arc-shaped plate 3 123 is rotatably connected to the bottom of the secondary screening barrel 120. The rotation angle of the arc-shaped plate 3 123 is controlled by a rotating motor to complete the discharge of pencils after secondary screening. A diameter sensor 2 124 is installed on one side of the connecting box 119. The probe of the diameter sensor 2 124 is aligned with the front end of the secondary screening barrel 120 to realize secondary verification and detection of the pencil lead size, thereby improving the detection accuracy.

[0022] like Figures 2 to 11As shown, the feeding assembly 130 includes a sieving box 131. The top of the sieving box 131 is fixed to the bottom of the connecting box 119, receiving pencils after secondary sieving. Multiple sets of rotating plates 132 are installed inside the sieving box 131. The rotating plates 132 are rotatably connected to the inner wall of the sieving box 131 via torsion springs. When a pencil falls, the torsion spring is pressed down, achieving a third diversion of the pencils and ensuring a uniform number of pencils in a single compartment. Multiple sets of electric push rods 133 are installed on the inner wall of the end of the sieving box 131 corresponding to the compartments of each rotating plate 132. The electric push rods 133 are fixed to the inner wall of the screening box 102. A push plate 134 is installed at the output end of the electric push rod 133, which can horizontally push out the pencils in the corresponding compartments. A diameter sensor 135 is installed on the inner wall of the front end of the sieving box 131. The probe of the diameter sensor 135 is aligned with the sieving box 131 to complete the final verification and confirmation of the pencil lead size. The back-end system controls the corresponding electric push rod 133 to operate based on the detection results. The front end of the sieving box 131 is equipped with... A rotating channel 136 has a micro motor 137 installed at its front end near the feed box 103. When defective products enter the rotating channel 136, it flips towards the front end of the conveyor belt 100, discharging the defective products in a directional manner. Qualified products are then fed into the subsequent discharge channel through the rotating channel 136. A discharge channel 138 is located on the side of the rotating channel 136 away from the feed box 103. A discharge box 139 is located at the top of the discharge channel 138, and two [unclear - possibly referring to components or components] are installed inside the discharge box 139. Rubber plate 140 acts as a buffer when the pencil falls, preventing damage to the pencil surface. After all the defective products in the secondary screening barrel 120 are removed, servo motor 111 drives the primary screening barrel 113 to rotate to the upper part of the feeding box 139. Servo motor 3121 and servo motor 214 rotate in sequence to send the qualified products into the feeding box 139. After being buffered by rubber plate 140, the qualified products fall smoothly onto the conveyor belt 100, completing the entire process of inspection and sorting.

[0023] The working principle of the technical solution provided by this invention is as follows: The pencils to be sampled are placed in batches into the feeding box 103. Relying on their own weight, they smoothly slide down the inclined guide structure of the inner cavity to the discharge port. The cylinder 105 is fixedly connected to the support frame 101. Through the telescopic movement, it drives the block 104 to move up and down, controlling the opening and closing of the feeding channel. This effectively avoids problems such as pencils accumulating and overflowing at the feeding port. After the pencils smoothly enter the feeding channel 106, the cylinder 2 108 lifts the end of the feeding channel 106 through the top plate 107. During the switching interval of the first-stage screening barrel 113, the feeding is blocked in time to prevent pencils from spilling, being thrown out, or clogging. The feeding channel 106 smoothly guides the pencils into the first-stage screening barrel 113 in a single row. The servo motor 2 114 synchronously drives the screening plate 115 to rotate, which evenly divides the inner cavity of the first-stage screening barrel 113 into multiple independent small compartments to complete the initial compartmenting and quantitative feeding process of the pencils. At the same time, the arc plate 116 closes under the control of the rotating motor to prevent the pencils from being accidentally thrown out during the rotation of the first-stage screening barrel 113. Then, servo motor 111 drives rotating rod 112 to rotate stably, driving three sets of circumferentially distributed primary screening barrels 113 to cycle through feeding, detection, dust removal and unloading stations, realizing multi-station synchronous parallel operation. Diameter sensor 118 continuously aligns with the front end of primary screening barrel 113 to perform optical detection, completing the first detection step of the dimensional parameter of the end face diameter of the pencil lead in the pencil. The detection data is transmitted to the background control system in real time and the current stop position of servo motor 111 is recorded. When the primary screening barrel 113 rotates to the corresponding position of the blower 109, the blower 109 starts and blows through the filter material structure at both ends of the primary screening barrel 113 to remove dust and debris from the pencil surface, ensuring clear and unobstructed subsequent optical inspection. After the initial inspection and dust removal are completed, the arc plate 117 opens under the control of the rotating motor, allowing the pencil in the corresponding compartment to fall smoothly into the secondary screening barrel 120 in the lower connecting box 119. After the pencil enters the secondary screening barrel 120, the servo motor 121 drives the screening plate 122 to rotate, further dividing the inner cavity of the secondary screening barrel 120 into smaller independent compartments, realizing secondary subdivision of the pencil and significantly reducing the range of defective products. The diameter sensor 124 is aligned with the front end of the secondary screening barrel 120 to complete the secondary verification inspection of the pencil lead in the pencil, further improving the detection accuracy and reliability. After the secondary inspection is completed, the arc plate 123 opens and the pencil falls into the screening box 131 of the feeding assembly 130. After the pencils enter the sieving box 131, the multiple sets of rotating plates 132 inside automatically press down as the pencils fall under the action of torsion springs, realizing the third diversion and ensuring that the number of pencils in each compartment is evenly distributed. The diameter sensor 135 performs the final size verification and confirmation of the pencil leads in the sieving box 131. The background control system locks the corresponding compartments of qualified and unqualified products based on the three-level detection results. Non-conforming product handling: The control system triggers the electric push rod 133 of the corresponding compartment to move. The electric push rod 133 drives the push plate 134 to smoothly push the non-conforming product into the rotating channel 136. The micro motor 137 then drives the rotating channel 136 to rotate in a directional manner, discharging the non-conforming product to the designated section of the conveyor belt 100, thus achieving physical isolation of the non-conforming product. Qualified product processing: The rotating channel 136 remains in its original position and smoothly feeds qualified products into the unloading channel 138. After the unqualified products in the secondary screening barrel 120 are completely removed, the servo motor 111 drives the primary screening barrel 113 to rotate to the upper part of the unloading box 139. The servo motor 3121 and the servo motor 214 rotate in sequence to orderly feed qualified products into the unloading box 139. After being flexibly buffered and protected by two sets of rubber plates 140 inside the unloading box 139, the pencils fall smoothly onto the conveyor belt 100 to complete the conveying. The entire process avoids the pencils from being bumped, scratched, or broken. Finally, the automated detection and sorting operation of pencil lead size is completed, from feeding, three-level optical detection, double-layer compartment subdivision, dust removal and cleaning to the directional diversion and discharge of qualified and unqualified products.

[0024] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A pencil lead size detection device based on intelligent sensors, characterized in that, The system includes a conveyor belt (100), a support frame (101) mounted on the top of one side of the conveyor belt (100), a screening box (102) mounted at the middle of the top of the conveyor belt (100), a feed box (103) mounted on the top of the support frame (101), a block (104) mounted on the bottom of the feed box (103) near the screening box (102), a cylinder (105) mounted on the bottom of the block (104), and the cylinder (105) fixedly connected to the support frame (101). A feeding channel (106) is installed inside the box (102) near the feeding box (103). The feeding channel (106) is in contact with the block (104) on the side near the feeding box (103). A top plate (107) is installed at the bottom of the feeding channel (106). A cylinder (108) is installed on the top of the top plate (107) away from the feeding box (103). The output end of the cylinder (108) is fixedly connected to the bottom of the feeding channel (106). A fan (109) is installed at the end of the screening box (102). The screening box (102) is equipped with a screening component (110), which is used to complete the detection step and preliminary grading of pencil lead size; The screening component (110) is equipped with a feeding component (130) at its bottom, which is used to separate qualified products from unqualified products and to discharge them in a directional manner.

2. The pencil lead size detection device based on intelligent sensors according to claim 1, characterized in that, The screening component (110) includes a servo motor (111), which is installed on the outer wall of the end of the screening box (102). A rotating rod (112) is installed at the output end of the servo motor (111). Three sets of primary screening barrels (113) are installed on the outer wall of the rotating rod (112) away from the servo motor (111). Both ends of the primary screening barrels (113) are made of filter screen material.

3. The pencil lead size detection device based on intelligent sensors according to claim 2, characterized in that, The first-stage screening barrel (113) is equipped with a servo motor 2 (114) at the front end, and a multi-group screening plate 1 (115) is installed at the output end of the servo motor 2 (114).

4. The pencil lead size detection device based on intelligent sensors according to claim 3, characterized in that, The top of the primary screening barrel (113) is rotatably connected to an arc plate (116), the arc plate (116) is rotated by a rotating motor, and the bottom of the primary screening barrel (113) is rotatably connected to an arc plate (117), the arc plate (117) is rotated by a rotating motor, and a diameter sensor (118) is installed on one side of the primary screening barrel (113), the probe of the diameter sensor (118) is aligned with the front end of the primary screening barrel (113).

5. The pencil lead size detection device based on intelligent sensors according to claim 4, characterized in that, The bottom of the primary screening barrel (113) is equipped with a connecting box (119), and the secondary screening barrel (120) is installed inside the connecting box (119). The two ends of the secondary screening barrel (120) are made of filter screen material. The front end of the secondary screening barrel (120) is equipped with a servo motor three (121), and the output end of the servo motor three (121) is equipped with multiple screening plates two (122).

6. The pencil lead size detection device based on intelligent sensors according to claim 5, characterized in that, The bottom of the secondary screening barrel (120) is rotatably connected to an arc plate three (123). The rotation angle of the arc plate three (123) is controlled by a rotating motor. A diameter measuring sensor two (124) is installed on one side of the connecting box (119). The probe of the diameter measuring sensor two (124) is aligned with the front end of the secondary screening barrel (120).

7. The pencil lead size detection device based on intelligent sensors according to claim 6, characterized in that, The feeding assembly (130) includes a screening box (131), the top of which is fixed to the bottom of the connecting box (119). Multiple sets of rotating plates (132) are installed inside the screening box (131), and the rotating plates (132) are rotatably connected to the inner wall of the screening box (131) by torsion springs.

8. The pencil lead size detection device based on intelligent sensors according to claim 7, characterized in that, The inner wall of the end of the sieving box (131) is provided with multiple sets of electric push rods (133), the electric push rods (133) are fixed to the inner wall of the screening box (102), and the output end of the electric push rods (133) is equipped with a push plate (134).

9. The pencil lead size detection device based on intelligent sensors according to claim 8, characterized in that, A diameter measuring sensor (135) is installed on the inner wall of the front end of the sieve box (131). The probe of the diameter measuring sensor (135) is aligned with the sieve box (131). A rotating channel (136) is provided at the front end of the sieve box (131). A micro motor (137) is installed at the front end of the rotating channel (136) near the feed box (103).

10. The pencil lead size detection device based on intelligent sensors according to claim 9, characterized in that, The rotating channel (136) is provided with a discharge channel (138) on the side away from the feed box (103). The top of the discharge channel (138) is provided with a discharge box (139), and two sets of rubber plates (140) are installed inside the discharge box (139).

Images