A digital cable high-precision meter counting device

Abstract

The present invention discloses a high-precision digital cable metering device, which relates to the field of cable metering, and comprises a metering frame, a metering guide wheel rotatably provided on the metering frame, an encoder installed on the measuring shaft of the metering guide wheel, a gravity guide wheel movably provided on the metering frame, an adjustable conveying space provided between the gravity guide wheel and the metering guide wheel, the digital cable passes through the conveying space, and under the action of the gravity guide wheel, a friction transmission pair is formed between the digital cable and the metering guide wheel, the metering frame is provided with a precision detection mechanism, the precision detection mechanism comprises a marking component, an identification sensor and a timer, the marking component and the identification sensor are arranged at both ends of the metering guide wheel along the conveying direction of the digital cable, the marking component is used to draw a detection line on the digital cable, the identification sensor is used to detect the detection line on the digital cable, the timer counts when the detection line is drawn, and the timing ends when the identification sensor identifies the detection line, thereby effectively improving the accuracy and reliability of metering.

Description

Technical Field

[0001] The present invention relates to the technical field of meter counting, in particular to a digital cable high-precision meter counting device. Background Art

[0002] Against the backdrop of the rapid development of communications and data transmission technologies, digital cables, as the core carrier of information transmission, are increasingly being used in a wide range of fields, including communication networks, data centers, and intelligent buildings. As mentioned in the paper "Research on Key Technologies for Length Measurement in Digital Cable Production," accurate length measurement of digital cables plays a key role in their production, processing, and use. This not only affects product quality but is also closely linked to the accuracy of project cost accounting and the efficient control of construction schedules.

[0003] Most common digital cable metering devices currently on the market use a roller-type structure. This mechanism utilizes friction between the roller and the digital cable to drive the roller's rotation, with an encoder recording the number of roller rotations to calculate the cable's length. However, numerous studies have demonstrated numerous drawbacks to this traditional metering method. The paper "Error Analysis and Improvement Strategies for Roller-Type Digital Cable Metering Devices" clearly states that the friction between the digital cable and the roller is affected by multiple factors and is highly unstable. The pressure applied to the digital cable is a key factor. Excessive pressure, as found in the paper "Experimental Study on the Influence of Digital Cable Physical Properties on Metering Accuracy," can significantly deform the digital cable, altering its cross-sectional shape. This can lead to a discrepancy between the actual circumference measured during roller rotation and the theoretically calculated circumference, severely impacting metering accuracy. On the other hand, insufficient pressure prevents sufficient friction between the digital cable and the roller, making it prone to cable slippage and similarly inaccurate metering results. Therefore, determining the precise transmission pressure for metering has become a key issue hindering the development of metering technology. Currently, related tests mostly rely on an empirical trial-and-error approach. This involves manually adjusting the pressure under different operating conditions and recording metering results, attempting to find the appropriate pressure value through numerous repetitive tests. This method is not only inefficient and time-consuming, but also lacks systematic parameter control and data analysis, making it difficult to accurately grasp the inherent relationship between pressure and metering accuracy. Furthermore, digital cables of varying specifications and materials exhibit significant variations in their sensitivity to pressure. Existing testing methods are unable to accurately test and optimize pressure for a wide range of digital cable products, making it difficult to obtain high-precision transmission pressures suitable for different digital cables. This makes it difficult for metering devices to achieve the desired level of accuracy in practical applications.

[0004] Furthermore, existing meter-counting devices generally lack effective accuracy detection and compensation mechanisms, making it difficult to detect and correct meter-counting deviations caused by factors such as equipment wear and installation errors. This results in a continuous increase in cumulative errors and is completely unable to meet the stringent requirements of high-precision meter-counting. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a digital cable high-precision metering device to solve the deficiencies of the prior art.

[0006] The objective of the present invention is achieved through the following technical solutions: a high-precision digital cable metering device, comprising a metering frame, a metering guide wheel rotatably provided on the metering frame, an encoder installed on the measuring shaft of the metering guide wheel, a gravity guide wheel movably provided on the metering frame, an adjustable conveying space provided between the gravity guide wheel and the metering guide wheel, the digital cable passes through the conveying space, and under the action of the gravity guide wheel, a friction transmission pair is formed between the digital cable and the metering guide wheel, an accuracy detection mechanism is provided on the metering frame, the accuracy detection mechanism includes a marking assembly, an identification sensor and a timer, the marking assembly and the identification sensor are arranged at both ends of the metering guide wheel along the conveying direction of the digital cable, the marking assembly is used to draw a detection line on the digital cable, the identification sensor is used to detect the detection line on the digital cable, the timer counts when the detection line is drawn, and the timing ends when the identification sensor identifies the detection line.

[0007] Furthermore, the marking assembly includes a positioning ring and a marking ring, two positioning rings are arranged at intervals along the conveying direction of the digital cable, the marking ring is coaxially arranged between the two positioning rings, the digital cable passes through the positioning ring and the marking ring, a plurality of sliding rods are passed through the marking ring, the plurality of sliding rods are arranged at intervals along the circumferential direction of the marking ring, the sliding rods move toward the center of the marking ring, and a marking pen is provided at one end of the sliding rod close to the center of the marking ring.

[0008] Furthermore, a spring disk is fixedly sleeved on the sliding rod, and the spring disk is located at the inner ring of the marking ring. A spring is sleeved on the sliding rod, one end of the spring is connected to the spring disk, and the other end is connected to the inner ring of the marking ring. The marking assembly also includes a driving ring, which is rotatably sleeved on the marking ring. A plurality of arc-shaped protrusions are fixed on the outer wall of the driving ring, and each of the sliding rods corresponds to one arc-shaped protrusion. A through hole is provided on the sliding rod, and the driving ring passes through the through hole. Different positions of the arc-shaped protrusions contact the inner wall of the through hole, so as to drive the sliding rod to move toward the center of the marking ring.

[0009] Furthermore, the marking ring is coaxially fixed with a mounting piece, the mounting piece is fixedly connected to the meter frame, the outer ring of the marking ring is fixed with arc-shaped teeth, the arc-shaped teeth engage the rack, and a driving cylinder is installed on the meter frame, and the telescopic shaft of the driving cylinder is connected to one end of the rack.

[0010] Furthermore, a lower pressure shaft is coaxially fixed to the gravity guide wheel, and the end of the lower pressure shaft away from the gravity guide wheel is rotatably connected to the swing arm. A gravity main shaft is fixed on the swing arm, and the gravity main shaft is rotatably connected to the meter frame through a bearing. A pushing cylinder is provided on the meter frame, and the cylinder body of the pushing cylinder is hinged on the meter frame, and the telescopic shaft of the pushing cylinder is hinged on the swing arm.

[0011] Furthermore, a measuring window is provided on the meter frame, and the measuring window is opened through the conveying direction perpendicular to the digital cable. A measuring block is provided in the measuring window, and the measuring shaft rotates through the measuring block. A guide rod is fixed on the top of the measuring block, and a guide hole is provided on the inner top wall of the measuring window. The guide rod is slidably adapted to the guide hole. A radial pressure sensor is installed on the inner bottom wall of the measuring window, and the pressure shaft of the radial pressure sensor contacts the measuring block. A counterweight wheel is fixedly mounted on the end of the measuring shaft away from the meter guide wheel, and the counterweight wheel and the meter guide wheel are distributed at both ends of the measuring block.

[0012] Furthermore, the meter guide wheel includes a measuring disc, a rubber wheel and a pressure ring. A rectangular notch is provided in the middle of the measuring disc and the rubber wheel. A driving body is fixed to the end of the measuring shaft away from the counterweight wheel. The driving body is in the shape of a rectangular parallelepiped. The measuring disc and the rubber wheel are sequentially mounted on the driving body, and the rectangular notch is adapted to the driving body. An annular groove is provided on the outer ring of the rubber wheel. The cross-section of the annular groove is U-shaped. The digital cable passes through the annular groove. The pressure ring presses the rubber wheel against the measuring disc and squeezes the annular groove. An axial pressure sensor is installed on the meter frame. The pressure shaft of the axial pressure sensor contacts the measuring disc.

[0013] Furthermore, a compensation frame is fixed on the meter stand, and a compensation cylinder is installed on the compensation frame. The telescopic direction of the compensation cylinder is collinear with the axial direction of the measuring axis. The telescopic axis of the compensation cylinder is fixedly connected to the inner ring of the compensation bearing, and the pressure ring is fixedly sleeved on the outer ring of the compensation bearing.

[0014] Furthermore, a meter-counting spindle is rotatably mounted on the meter-counting frame, a driving pulley is mounted on the meter-counting spindle, a driven pulley is mounted on the measuring shaft, the driven pulley is connected to the driving pulley via a synchronous belt transmission, a motor is mounted on the meter-counting frame, and the output shaft of the motor is connected to the meter-counting spindle.

[0015] Furthermore, locking shaft assemblies are provided on both sides of the axial direction of the meter-counting spindle, and the locking shaft assemblies include a locking frame and an arc-shaped friction plate. A driving hole is opened at one end of the locking frame close to the meter-counting spindle, and a driving locking shaft is slidingly arranged in the driving hole. The driving locking shaft is connected to the arc-shaped friction plate, and an electromagnet is installed in the driving hole. A permanent magnet is fixed to the end of the driving locking shaft away from the arc-shaped friction plate, and a locking shaft spring is installed in the driving hole. The two ends of the locking shaft spring are respectively connected to the locking frame and the driving locking shaft, and the electromagnet generates magnetic poles with the same magnetic properties as the permanent magnet when energized.

[0016] The beneficial effects of the present invention are:

[0017] 1. First, test to obtain the optimal meter-counting pressure of the digital cable. The digital cable is transported between the meter-counting guide wheel and the gravity guide wheel. A detection line is drawn on the digital cable through the marking component. At this time, the timer starts timing. The timer stops timing when the identification sensor recognizes the detection line. The theoretical conveying length of the digital cable is obtained by combining the detection time of the timer with the conveying speed of the meter-counting guide wheel. The theoretical conveying length is compared with the actual conveying length recorded by the encoder. If the comparison result is within the allowable error range, this pressure is set as the meter-counting conveying pressure of the digital cable. If the comparison result exceeds the error range, the pressure of the gravity guide wheel on the digital cable is adjusted and retested until the comparison result falls within the allowable error range, thereby effectively improving the accuracy and reliability of the meter-counting. At the same time, during the meter-counting process, the precision detection mechanism regularly performs meter-counting accuracy detection on the digital cable to promptly discover errors in the meter-counting process and provide data support for subsequent error correction.

[0018] 2. The digital cable is partially covered by the annular groove of the rubber wheel for transportation, so that the friction force on the digital cable is uniform, which can effectively avoid the problem of the digital cable slipping during transportation, has a better transportation effect, and makes the meter counting accuracy higher.

[0019] 3. The radial pressure sensor detects the pressure of the gravity guide wheel on the digital cable in real time, and then compensates for the radial pressure on the digital cable through the movement of the gravity guide wheel. The axial pressure sensor detects the pressure between the digital cable and the rubber cable in real time, and then compensates for the axial pressure on the digital cable through the movement of the pressure ring. The factors that affect the friction of the digital cable transmission are fully considered, so that real-time adjustment and compensation are made during the meter counting process, so that the meter counting accuracy is always maintained within the set range, effectively improving the accuracy and reliability of the meter counting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a digital cable high-precision metering device of the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of a digital cable high-precision metering device of the present invention. Figure 2;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a schematic diagram of the structure of a digital cable high-precision metering device of the present invention. Figure 3 ;

[0024] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0025] Figure 6 This is a schematic diagram of the structure of a digital cable high-precision metering device of the present invention. Figure 4 ;

[0026] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0027] Figure 8 This is a schematic diagram of the structure of a digital cable high-precision metering device of the present invention. Figure 5 ;

[0028] Figure 9 This is a schematic diagram of the internal structure of a lock frame in a digital cable high-precision meter counting device of the present invention;

[0029] In the figure, 1-meter frame, 2-meter guide wheel, 3-measuring axis, 4-encoder, 5-gravity guide wheel, 6-identification sensor, 7-timer, 8-positioning ring, 9-marking ring, 10-sliding rod, 11-marking pen, 12-spring disk, 13-spring, 14-driving ring, 15-arc-shaped protrusion, 16-through hole, 17-mounting part, 18-arc-shaped tooth, 19-rack, 20-driving cylinder, 21-down pressure shaft, 22-swing arm, 23-gravity spindle, 24-pushing cylinder, 25-measuring window, 26-measuring block, 27-guide rod, 28-radial pressure sensor, 29-counterweight wheel, 30-measuring disc, 31-rubber wheel, 32-pressure ring, 33-drive body, 34-annular groove, 35-axial pressure sensor, 36-compensation frame, 37-compensation cylinder, 38-compensation bearing, 39-meter spindle, 40-driving pulley, 41-driven pulley, 42-synchronous belt, 43-motor, 44-lock frame, 45-arc friction plate, 46-drive hole, 47-drive lock shaft, 48-electromagnet, 49-permanent magnet, 50-lock shaft spring. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0031] Example 1

[0032] like Figures 1 to 9 As shown, a digital cable high-precision meter counting device includes a meter frame 1, a meter guide wheel 2 is rotatably provided on the meter frame 1, an encoder 4 is installed on the measuring shaft 3 of the meter guide wheel 2, a gravity guide wheel 5 is movably provided on the meter frame 1, an adjustable conveying space is provided between the gravity guide wheel 5 and the meter guide wheel 2, the digital cable passes through the conveying space, and under the action of the gravity guide wheel 5, a friction transmission pair is formed between the digital cable and the meter guide wheel 2, an accuracy detection mechanism is provided on the meter frame 1, and the accuracy detection mechanism includes a marking component, an identification sensor 6 and a timer 7, and the marking component and the identification sensor 6 are arranged on the meter guide along the conveying direction of the digital cable. At both ends of the wheel 2, the marking components are used to draw a detection line on the digital cable, the identification sensor 6 is used to detect the detection line on the digital cable, and the timer 7 counts when the detection line is drawn. When the identification sensor 6 recognizes the detection line, the timing ends, and the unwound digital cable passes through the conveying space. The meter-counting digital cable is reeled in by the reeling rack, and the digital cable is squeezed between the gravity guide wheel 5 and the meter-counting guide wheel 2, so that friction is generated between the digital cable and the meter-counting guide wheel 2. Through this friction, the digital cable moves with the meter-counting guide wheel 2 to complete the conveying and counting of meters. By adjusting the pressure of the gravity guide wheel 5 on the digital cable, the friction between the digital cable and the meter-counting guide wheel 2 is adjusted. force to adapt to the metering of different types of cables. The metering conveying pressure of different digital cables can be measured through the precision detection mechanism, so that the digital cable can complete the metering operation under the corresponding conveying pressure, thereby improving the accuracy of metering. Specifically, the digital cable is conveyed between the metering guide wheel 2 and the gravity guide wheel 5. A detection line is drawn on the digital cable through the marking component. At the same time, the timer 7 starts timing and stops timing when the recognition sensor 6 recognizes the detection line. The theoretical conveying length of the digital cable is obtained by combining the detection time of the timer with the conveying speed of the metering guide wheel 2, and the theoretical conveying length is compared with the actual conveying length recorded by the encoder 4. If the comparison result is within the allowable error range, the pressure is set as the meter-counting conveying pressure of the digital cable. If the comparison result exceeds the error range, the pressure of the gravity guide wheel 5 on the digital cable is adjusted and retested until the comparison result falls within the allowable error range and the test is stopped. Subsequently, the same type of digital cable uses the conveying pressure for meter counting, thereby effectively improving the accuracy and reliability of meter counting and being able to adapt to the precise meter counting of different cables. At the same time, during the meter counting process, the precision detection mechanism regularly performs meter counting accuracy detection on the digital cable, promptly discovers errors in the meter counting process, and provides data support for subsequent error correction.

[0033] Example 2

[0034] On the basis of Example 1, a meter-counting spindle 39 is rotatably installed on the meter-counting frame 1, a driving pulley 40 is mounted on the meter-counting spindle 39, a driven pulley 41 is mounted on the measuring shaft 3, the driven pulley 41 is connected to the driving pulley 40 through a synchronous belt 42, a motor 43 is installed on the meter-counting frame 1, the output shaft of the motor 43 is connected to the meter-counting spindle 39, the motor 43 drives the driving pulley 40 to rotate, the driving pulley 40 drives the driven pulley 41 to rotate through the synchronous belt 42, the driven pulley 41 drives the meter-counting spindle 39 to rotate, and the digital cable is driven forward by the friction between the meter-counting spindle 39 and the digital cable, and the number of rotations of the meter-counting spindle 39 is recorded by the encoder 4, thereby reflecting the meter-counting length of the digital cable.

[0035] Example 3

[0036] Since the motor 43 will continue to drive the driving pulley 40 to rotate due to inertia when it stops, the final position of the digital cable meter will continue to be transported forward for a distance, resulting in the final cutting length of the digital cable exceeding the meter length. Therefore, based on the second embodiment, Figures 1 to 9 As shown, a locking shaft assembly is provided on both sides of the axial direction of the meter spindle 39, and the locking shaft assembly includes a locking frame 44 and an arc-shaped friction plate 45. A driving hole 46 is provided at one end of the locking frame 44 close to the meter spindle 39, and a driving locking shaft 47 is slidingly provided in the driving hole 46. The driving locking shaft 47 is connected to the arc-shaped friction plate 45, and an electromagnet 48 is installed in the driving hole 46. A permanent magnet 49 is fixed to the end of the driving locking shaft 47 away from the arc-shaped friction plate 45, and a locking shaft spring 50 is installed in the driving hole 46. The two ends of the locking shaft spring 50 are respectively connected to the locking frame 44 and the driving locking shaft 47. When the electromagnet 48 is energized, it generates a magnetic pole with the same magnetic property as the permanent magnet 49. When the lock shaft spring 50 is in normal state, the arc friction plate 45 is separated from the meter counting spindle 39. When the meter counting is finished, the electromagnet 48 is energized to repel the permanent magnet 49, so that the drive lock shaft 47 drives the arc friction plate 45 to move close to the meter counting spindle 39, so that the arc friction plates 45 in the two lock shaft assemblies clamp the meter counting spindle 39, so that the meter counting spindle 39 can stop rotating quickly, so that the difference between the length of the digital cable after cutting and the meter counting length of the digital cable is greatly reduced, thereby improving the accuracy of meter counting.

[0037] Example 4

[0038] Based on the third embodiment, Figures 1 to 7As shown, the marking assembly includes a positioning ring 8 and a marking ring 9. Two positioning rings 8 are arranged at intervals along the conveying direction of the digital cable. The marking ring 9 is coaxially arranged between the two positioning rings 8. The digital cable passes through the positioning ring 8 and the marking ring 9. A plurality of sliding rods 10 are passed through the marking ring 9. The plurality of sliding rods 10 are arranged at intervals along the circumferential direction of the marking ring 9. The sliding rods 10 move toward the center of the marking ring 9. A marking pen 11 is provided at one end of the sliding rod 10 close to the center of the marking ring 9. The movement of the sliding rod 10 drives the marking pen 11 to move close to the digital cable, so that the marking pen 11 draws a detection point on the digital cable. Since the cable is in a conveying state, in order not to affect the conveying of the cable, the detection points are marked on the digital cable in the form of punctuation. Through the simultaneous movement of multiple marking pens 11, multiple continuous or nearly continuous detection points are formed on the digital cable, so that the detection points form a detection line for recognition by the identification sensor 6. The detection points marked in this way can be arranged around the circumferential direction of the digital cable to avoid multiple detection points being arranged in a spiral shape during the conveyance of the digital cable, which affects the recognition action of the identification sensor 6. In a specific implementation, the identification sensor 6 is a color sensor, and the marking pen 11 is a color different from the digital cable, so that the color of the digital cable applied by the marking pen 11 can be accurately identified by the color sensor.

[0039] Furthermore, a mounting groove is provided at one end of the sliding rod 10 for providing the marking pen 11, and one end of the marking pen 11 is inserted into the mounting groove. A fastening screw is threadedly connected to the side wall of the sliding rod 10, and the tail end of the fastening screw is inserted into the mounting groove to tighten the marking pen 11, thereby being able to adjust the position of the marking pen 11. For different types of digital cables, the position of the marking pen 11 is adjusted accordingly, so that the marking pen 11 can smoothly draw the detection point on the digital cable without squeezing the digital cable to affect the metering accuracy.

[0040] Example 5

[0041] Based on the fourth embodiment, Figures 1 to 5As shown, a spring disk 12 is fixedly sleeved on the sliding rod 10, and the spring disk 12 is located in the inner ring of the marking ring 9. A spring 13 is sleeved on the sliding rod 10, and one end of the spring 13 is connected to the spring disk 12, and the other end is connected to the inner ring of the marking ring 9. The marking assembly also includes a driving ring 14, which is rotatably sleeved on the marking ring 9. A plurality of arc-shaped protrusions 15 are fixed on the outer wall of the driving ring 14, and each sliding rod 10 corresponds to an arc-shaped protrusion 15. A through hole 16 is opened on the sliding rod 10, and the driving ring 14 passes through the through hole 16. Different positions of the arc-shaped protrusion 15 contact the inner wall of the through hole 16 for driving the sliding The rod 10 moves toward the center of the circle of the marking ring 9. The marking ring 9 is coaxially fixed with a mounting member 17. The mounting member 17 is fixedly connected to the meter frame 1. The outer ring of the marking ring 9 is fixed with an arc-shaped tooth 18. The arc-shaped tooth 18 engages with the rack 19. A driving cylinder 20 is installed on the meter frame 1. The telescopic shaft of the driving cylinder 20 is connected to one end of the rack 19. An arc-shaped groove is provided on the outer wall of the marking ring 9. An arc-shaped slider is fixed on the inner wall of the driving ring 14. The arc-shaped slider slides and fits in the arc-shaped groove. Initially, the top of the arc-shaped protrusion 15 contacts the inner wall of the through hole 16, and the spring 13 is in a compressed state. When it is necessary to draw a detection line on the digital cable, the driving cylinder 20 is driven. The cylinder 20 drives the rack 19 to move, so that the rack 19 drives the driving ring 14 to deflect on the marking ring 9 through the arc-shaped teeth 18, so that the top of the arc-shaped protrusion 15 is separated from the inner wall of the through hole 16. At this time, the marking pen 11 moves toward the digital cable under the reaction force of the spring 13, thereby drawing a detection point on the digital cable. The driving cylinder 20 immediately resets after driving the rack 19 to move, so that the arc-shaped protrusion 15 pushes up the sliding rod 10, thereby separating the marking pen 11 from the digital cable. The driving cylinder 20 adopts a reciprocating action to make the marking pen 11 quickly contact the digital cable and reset, so that the detection point can be smoothly drawn on the digital cable. Each sliding rod 10 is correspondingly provided with an arc-shaped protrusion 15, and the contact mode of each sliding rod 10 and the arc-shaped protrusion 15 is consistent, so that multiple marking pens 11 can be driven to move simultaneously, and multiple marking pens 11 are arranged along the circumferential direction of the digital cable to stably form a detection line for identification sensor 6 to identify; the above operation requires the digital cable to pass through the marking ring 9 coaxially. For this purpose, two positioning rings 8 are provided. The inner diameter size of the positioning ring 8 matches the outer diameter of the digital cable, so that the digital cable is conveyed through the positioning ring 8, thereby guiding the digital cable and making the digital cable pass through the marking ring 9 coaxially, so that the detection line can be accurately drawn.

[0042] Example 6

[0043] During the meter counting process, a friction pair is formed between the digital cable and the meter counting guide wheel 2, resulting in wear at the contact position between the meter counting guide wheel 2 and the digital cable, which reduces the friction between the digital cable and the meter counting guide wheel 2, causing the delivery pressure of the digital cable to fail to reach the marked delivery pressure. The friction force on the digital cable is reduced, and the digital cable is prone to slippage, affecting the meter counting accuracy. Therefore, based on the fifth embodiment, as shown in FIG. Figures 1 to 7 As shown, the gravity guide wheel 5 is coaxially fixed with a lower pressure shaft 21, and the end of the lower pressure shaft 21 away from the gravity guide wheel 5 is rotatably connected to the swing arm 22. A gravity main shaft 23 is fixed on the swing arm 22, and the gravity main shaft 23 is rotatably connected to the meter frame 1 through a bearing. The meter frame 1 is provided with a push cylinder 24, and the cylinder body of the push cylinder 24 is hinged on the meter frame 1. The telescopic shaft of the push cylinder 24 is hinged on the swing arm 22. The swing arm 22 is deflected around the gravity main shaft 23 by the telescopic movement of the push cylinder 24, so that the gravity guide wheel 5 is deflected close to or away from the meter guide wheel 2, thereby adjusting the extrusion force on the digital cable, which is equivalent to adjusting The positive pressure of the digital cable is adjusted by adjusting the friction between the digital cable and the meter guide wheel 2. A measuring window 25 is provided on the meter frame 1. The measuring window 25 is opened along a direction perpendicular to the conveying direction of the digital cable. A measuring block 26 is provided in the measuring window 25. The measuring shaft 3 rotates through the measuring block 26. A guide rod 27 is fixed to the top of the measuring block 26. A guide hole is provided on the inner top wall of the measuring window 25. The guide rod 27 is slidably adapted to the guide hole. A radial pressure sensor 28 is installed on the inner bottom wall of the measuring window 25. The pressure shaft of the radial pressure sensor 28 contacts the measuring block 2 6. A counterweight wheel 29 is fixedly mounted on the end of the measuring shaft 3 away from the meter guide wheel 2. The counterweight wheel 29 and the meter guide wheel 2 are distributed at both ends of the measuring block 26. When the accuracy detection mechanism tests and obtains the delivery pressure of the digital cable, the radial pressure sensor 28 will obtain the radial delivery pressure of the digital cable. This radial delivery pressure is used as the standard radial delivery pressure. The guide rod 27 cooperates with the guide hole to make the measuring block 26 directly act on the radial pressure sensor 28. The squeezing force of the gravity guide wheel 5 on the digital cable is transmitted to the radial pressure sensor 28 through the meter guide wheel 2 and the measuring block 26, thereby being able to The radial delivery pressure of the digital cable is monitored in real time. When the contact position between the meter guide wheel 2 and the digital cable gradually wears out, the digital cable gradually separates from the gravity guide wheel 5, and the detection value of the radial pressure sensor 28 will decrease. At this time, the push cylinder 24 drives the swing arm 22 to deflect close to the meter guide wheel 2, so that the gravity guide wheel 5 continues to squeeze the digital cable. When the pressure value fed back by the radial pressure sensor 28 is equal to the standard radial delivery pressure, the push cylinder 24 stops running, so that the radial delivery pressure of the digital cable can be monitored in real time, and the radial delivery pressure can be adjusted in real time according to the monitoring value to improve the metering accuracy.

[0044] Example 7

[0045] Based on Example 6, Figures 1 to 9As shown, the meter guide wheel 2 includes a measuring disc 30, a rubber wheel 31 and a pressure ring 32. A rectangular notch is provided in the middle of the measuring disc 30 and the rubber wheel 31. A driving body 33 is fixed to the end of the measuring shaft 3 away from the counterweight wheel 29. The driving body 33 is in the shape of a rectangular parallelepiped. The measuring disc 30 and the rubber wheel 31 are sequentially sleeved on the driving body 33, and the rectangular notch is adapted to the driving body 33. An annular groove 34 is provided on the outer ring of the rubber wheel 31. The cross section of the annular groove 34 is U-shaped. The digital cable passes through the annular groove 34. The pressure ring 32 presses the rubber wheel 31 against the measuring disc 30 and squeezes the annular groove 34. An axial pressure sensor 35 is installed on the meter frame 1. The pressure shaft of the axial pressure sensor 35 contacts the measuring disc 30. A compensation frame 36 is fixed on the meter frame 1. A compensation cylinder 37 is installed on the compensation frame 36. The telescopic direction of the compensation cylinder 37 is collinear with the axial direction of the measuring shaft 3. The telescopic shaft of the compensation cylinder 37 is fixedly connected to the inner ring of the compensation bearing 38, and the pressure ring 32 is fixedly sleeved on the outer ring of the compensation bearing 38. When the precision detection mechanism tests and obtains the delivery pressure of the digital cable, the axial pressure sensor 35 will obtain the axial delivery pressure of the digital cable, and take the axial delivery pressure as the standard axial delivery pressure. Due to the U-shaped design of the annular groove 34, the digital cable and the rubber wheel 31 are in arc contact, with a large contact area, that is, the two sides of the rubber wheel 31 contact the digital cable to form axial pressure, and the digital cable contacts the bottom wall of the annular groove 34 to form radial pressure, so that the extrusion force on the digital cable is more uniform, which can effectively avoid the digital cable from being squeezed. The rubber wheel 31 slips. This large-area contact causes the rubber wheel 31 to wear on both side walls and the bottom wall of the annular groove 34. The wear of the bottom wall of the annular groove 34 affects the radial delivery pressure of the digital cable. The wear of the side walls of the annular groove 34 affects the axial delivery pressure of the digital cable. The axial delivery pressure and the radial delivery pressure are superimposed to form a meter delivery pressure. Therefore, the meter delivery pressure is affected by the axial delivery pressure and the radial delivery pressure. The radial delivery pressure is monitored in real time by the radial pressure sensor 28 and compensated in real time by the movement of the gravity guide wheel 5, while the axial delivery pressure is monitored in real time by the axial pressure sensor 35 and compensated in real time by the movement of the pressure ring 32. Specifically, the detection of the axial pressure sensor 35 The measuring position is at the same horizontal position as the side wall of the annular groove 34, and the position where the pressure ring 32 squeezes the rubber wheel 31 is at the side wall of the annular groove 34, so that the axial pressure of the cable can be detected more accurately. At the same time, the pressure ring 32 can also stably squeeze the rubber wheel 31, so that the side wall of the annular groove 34 is close to the digital cable. When the side wall of the annular groove 34 is worn, the squeezing force of the pressure ring 32 on the digital cable becomes smaller, the reaction force of the rubber wheel 31 on the measuring disk 30 is reduced, and the detection value of the axial pressure sensor 35 is reduced. At this time, the compensation cylinder 37 drives the pressure ring 32 to move closer to the rubber wheel 31, so that the pressure ring 32 continues to squeeze the rubber wheel 31 to produce deformation, so that the side wall of the annular groove 34 is close to the digital cable again, and the axial delivery pressure is fed back through the axial pressure sensor 35.When the detected axial delivery pressure equals the standard axial delivery pressure, the compensation cylinder 37 stops operating, thus enabling real-time compensation of the axial delivery pressure. This decouples the force applied to the digital cable and rationally arranges the compensation mechanism to ensure that the compensated delivery pressure equals the standard delivery pressure, improving the metering accuracy of the digital cable. The provision of the compensation bearing 38 allows rotational freedom between the pressure ring 32 and the compensation cylinder 37, allowing the pressure ring 32 to move along with the rubber wheel 31, preventing the pressure ring from affecting the rotation of the rubber wheel 31 and, in turn, affecting metering accuracy. Furthermore, the metering guide wheel 2 is configured as a split structure. This facilitates replacement of the rubber wheel 31 when wear exceeds the compensation range, and also facilitates replacement of the corresponding rubber wheel 31 according to the model and diameter of the digital cable.

Claims

1. A digital cable high-precision metering device, characterized in that: The invention comprises a meter frame (1), wherein a meter guide wheel (2) is rotatably provided on the meter frame (1), an encoder (4) is installed on the measuring shaft (3) of the meter guide wheel (2), a gravity guide wheel (5) is movably provided on the meter frame (1), an adjustable conveying space is provided between the gravity guide wheel (5) and the meter guide wheel (2), a digital cable passes through the conveying space, and under the action of the gravity guide wheel (5), a friction transmission pair is formed between the digital cable and the meter guide wheel (2), an accuracy detection mechanism is provided on the meter frame (1), the accuracy detection mechanism comprises a marking component, an identification sensor (6) and a timer (7), the marking component and the identification sensor (6) are arranged at both ends of the meter guide wheel (2) along the conveying direction of the digital cable, the marking component is used to draw a detection line on the digital cable, the identification sensor (6) is used to detect the detection line on the digital cable, and the timer (7) counts when the detection line is drawn, and the timing ends when the identification sensor (6) identifies the detection line; The marking assembly includes a positioning ring (8) and a marking ring (9), two positioning rings (8) are arranged at intervals along the conveying direction of the digital cable, the marking ring (9) is coaxially arranged between the two positioning rings (8), and the digital cable passes through the positioning ring (8) and the marking ring (9), and a plurality of sliding rods (10) are passed through the marking ring (9), and the plurality of sliding rods (10) are arranged at intervals along the circumferential direction of the marking ring (9), and the sliding rods (10) move toward the center of the marking ring (9), and a marking pen (11) is provided at one end of the sliding rod (10) close to the center of the marking ring (9), and a mounting groove is opened at one end of the sliding rod (10) where the marking pen (11) is provided, and one end of the marking pen (11) is inserted into the mounting groove, and a fastening screw is threadedly connected to the side wall of the sliding rod (10), and the tail of the fastening screw penetrates into the mounting groove and presses against the marking pen (11).

2. A digital cable high-precision metering device according to claim 1, characterized in that: A spring disk (12) is fixedly sleeved on the sliding rod (10), and the spring disk (12) is located on the inner ring of the marking ring (9). A spring (13) is sleeved on the sliding rod (10), and one end of the spring (13) is connected to the spring disk (12), and the other end is connected to the inner ring of the marking ring (9). The marking assembly also includes a driving ring (14), and the driving ring (14) is rotatably sleeved on the marking ring (9). A plurality of arc-shaped protrusions (15) are fixed on the outer wall of the driving ring (14), and each of the sliding rods (10) corresponds to one of the arc-shaped protrusions (15). A through hole (16) is opened on the sliding rod (10), and the driving ring (14) passes through the through hole (16). Different positions of the arc-shaped protrusions (15) contact the inner wall of the through hole (16) to drive the sliding rod (10) to move toward the center of the marking ring (9).

3. A digital cable high-precision metering device according to claim 2, characterized in that: The marking ring (9) is coaxially fixed with a mounting member (17), the mounting member (17) is fixedly connected to the meter frame (1), the outer ring of the marking ring (9) is fixed with an arc-shaped tooth (18), the arc-shaped tooth (18) engages with a rack (19), and a driving cylinder (20) is installed on the meter frame (1), and the telescopic shaft of the driving cylinder (20) is connected to one end of the rack (19).

4. A digital cable high-precision metering device according to claim 1, characterized in that: The gravity guide wheel (5) is coaxially fixed with a lower pressure shaft (21), and one end of the lower pressure shaft (21) away from the gravity guide wheel (5) is rotatably connected to a swing arm (22), a gravity main shaft (23) is fixed on the swing arm (22), and the gravity main shaft (23) is rotatably connected to the meter frame (1) through a bearing, and a pushing cylinder (24) is provided on the meter frame (1), a cylinder body of the pushing cylinder (24) is hinged on the meter frame (1), and a telescopic shaft of the pushing cylinder (24) is hinged on the swing arm (22).

5. A digital cable high-precision metering device according to claim 4, characterized in that: The meter frame (1) is provided with a measuring window (25), the measuring window (25) is opened perpendicular to the conveying direction of the digital cable, a measuring block (26) is provided in the measuring window (25), the measuring shaft (3) rotates through the measuring block (26), a guide rod (27) is fixed to the top of the measuring block (26), the inner top wall of the measuring window (25) is provided with a guide hole, the guide rod (27) is slidably adapted to the guide hole, a radial pressure sensor (28) is installed on the inner bottom wall of the measuring window (25), the pressure shaft of the radial pressure sensor (28) contacts the measuring block (26), and a counterweight wheel (29) is fixedly sleeved on one end of the measuring shaft (3) away from the meter guide wheel (2), and the counterweight wheel (29) and the meter guide wheel (2) are distributed at both ends of the measuring block (26).

6. A digital cable high-precision metering device according to claim 5, characterized in that: The meter guide wheel (2) includes a measuring disc (30), a rubber wheel (31) and a pressure ring (32). A rectangular notch is provided in the middle of each of the measuring disc (30) and the rubber wheel (31). A driving body (33) is fixed to one end of the measuring shaft (3) away from the counterweight wheel (29). The driving body (33) is in the shape of a rectangular parallelepiped. The measuring disc (30) and the rubber wheel (31) are sequentially sleeved on the driving body (33), and the rectangular notch is adapted to the driving body (33). An annular groove (34) is provided on the outer ring of the rubber wheel (31). The cross section of the annular groove (34) is U-shaped. The digital cable passes through the annular groove (34). The pressure ring (32) presses the rubber wheel (31) against the measuring disc (30) and squeezes the annular groove (34). An axial pressure sensor (35) is installed on the meter frame (1). The pressure shaft of the axial pressure sensor (35) contacts the measuring disc (30).

7. A digital cable high-precision metering device according to claim 6, characterized in that: A compensation frame (36) is fixed on the meter frame (1), and a compensation cylinder (37) is installed on the compensation frame (36). The telescopic direction of the compensation cylinder (37) is collinear with the axial direction of the measuring shaft (3). The telescopic shaft of the compensation cylinder (37) is fixedly connected to the inner ring of the compensation bearing (38), and the pressure ring (32) is fixedly sleeved on the outer ring of the compensation bearing (38).

8. The high-precision digital cable metering device according to claim 1, characterized in that: A meter counting spindle (39) is rotatably mounted on the meter counting frame (1), a driving pulley (40) is sleeved on the meter counting spindle (39), a driven pulley (41) is sleeved on the measuring shaft (3), the driven pulley (41) is connected to the driving pulley (40) via a synchronous belt (42), a motor (43) is mounted on the meter counting frame (1), and an output shaft of the motor (43) is connected to the meter counting spindle (39).

9. A digital cable high-precision metering device according to claim 8, characterized in that: The meter-counting spindle (39) is provided with a locking shaft assembly on both axial sides, and the locking shaft assembly includes a locking frame (44) and an arc-shaped friction plate (45). The locking frame (44) is provided with a driving hole (46) at one end close to the meter-counting spindle (39). A driving locking shaft (47) is slidably provided in the driving hole (46). The driving locking shaft (47) is connected to the arc-shaped friction plate (45). An electromagnet (48) is installed in the driving hole (46). A permanent magnet (49) is fixed to one end of the driving locking shaft (47) away from the arc-shaped friction plate (45). A locking shaft spring (50) is installed in the driving hole (46). The two ends of the locking shaft spring (50) are respectively connected to the locking frame (44) and the driving locking shaft (47). When the electromagnet (48) is energized, it generates a magnetic pole with the same magnetic property as the permanent magnet (49).

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