A large circular yarn length measuring device

Abstract

The utility model relates to the technical field of circular knitting machine detection, and specifically to a circular knitting machine yarn length measuring device. The utility model comprises: at least one detector, the detector comprises a rotation input component, the rotation input component comprises a main shaft, and a pulley is installed on the main shaft; the detector also comprises a shell, and the main shaft is rotatably installed on the shell; a rotation signal sensing module is arranged in the shell; a slave MCU control module is arranged in the shell, and the slave MCU control module comprises a storage chip, and the slave MCU control module is connected to the rotation signal sensing module in communication; a main controller, a display screen is arranged on the main controller, the main controller is arranged outside the shell, a main MCU control module is arranged in the main controller, the display screen is connected to the main MCU control module in communication, and the main MCU control module is connected to the slave MCU control module in communication. The yarn conveying parameters on each detector can be centrally displayed, and the advantages of convenient reading and good data storage reliability are good.

Description

Technical Field

[0001] The utility model relates to the technical field of large circular knitting machine detection, in particular to a yarn length measuring device for a large circular knitting machine. Background Art

[0002] In the circular knitting machine system, the cloth is woven continuously by hundreds of yarns. Yarn length, also known as coil length, refers to the length of yarn required to form the coil of knitted fabric. The size of yarn length determines the weight of the fabric, and the consistency of yarn length determines the flatness of the fabric and the clarity of the texture; yarn length not only determines the quality of the product, but also affects the cost accounting of the yarn usage and the economic benefits of the enterprise. Therefore, yarn length is a major indicator of knitted products, and the measurement and recording of yarn length is particularly important.

[0003] The existing yarn length measuring device integrates a detector and a controller that records and displays the detection data, which results in high cost of a single measuring device, and when reading data from the display, each controller needs to be read one by one, which makes reading data inconvenient; if one controller is used to correspond to multiple detectors, when the controller is damaged, all data will be lost, and there is a risk of data loss. Utility Model Content

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a large circular machine yarn length measuring device, which can centrally display the yarn conveying parameters on each detector and has the advantages of convenient reading and good data storage reliability.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A large circular machine yarn length measuring device, comprising:

[0007] At least one detector, the detector includes a rotation input component, the rotation input component includes a main shaft, and a pulley is installed on the main shaft; the detector also includes a shell, and the main shaft is rotatably installed on the shell; a rotation signal generator is provided on the main shaft, and a rotation signal sensing module is provided in the shell corresponding to the rotation signal generator; a slave MCU control module is provided in the shell, and the slave MCU control module includes a storage chip, and the slave MCU control module is communicatively connected with the rotation signal sensing module; a main controller, a display screen is provided on the main controller, the main controller is arranged on the outside of the shell, a main MCU control module is provided in the main controller, the display screen is communicatively connected with the main MCU control module, and the main MCU control module is communicatively connected with the slave MCU control module.

[0008] Furthermore, in the present application, a circular yarn length measuring device is provided with a pair of 485 communication interfaces on the detector, and a plurality of the detectors are connected in series through the 485 communication interfaces. A 485 communication interface corresponding to the detector is provided on the main controller, and the main MCU control module is connected in communication with the detector through the 485 communication interface. As a preferred solution of the present application, a plurality of the detectors are arranged in an interval arrangement, and communication connection is achieved between adjacent detectors by plugging communication cables in the 485 communication interface, which has the advantage of convenient wiring, and has an automatic networking function, realizing plug-and-play and automatic sorting in the order of communication series connection, without the need to set the address of the measuring tool by oneself.

[0009] Furthermore, in the present application, a circular knitting machine yarn length measuring device is provided, wherein the slave MCU control module is communicatively connected to a zero position detection sensor installed on a fixed part of the circular knitting machine, and the zero position detection sensor is used to detect whether the main rotor of the circular knitting machine rotates to a preset zero position; the main controller is provided with a corresponding zero position detection sensor communication interface, and the zero position detection sensor is connected to the main controller. As a preferred solution of the present application, if the zero position detection sensor is directly connected to a detector, a communication interface needs to be reserved on the detector, and since only one zero position detection sensor needs to be provided, the interface on the detector that is not connected to the zero position detection sensor will be wasted. Therefore, connecting the zero position detection sensor to the main controller can reduce the number of interfaces and reduce the overall manufacturing cost.

[0010] Furthermore, in the present application, a circular knitting machine yarn length measuring device, the main controller and the detector are detachably connected. As a preferred solution of the present application, it has the advantage of being easy to install, and there is no need to set a structure for installing the main controller on the circular knitting machine.

[0011] Furthermore, in the present application, a large circular machine yarn length measuring device is provided with a rotating connection seat between the main controller and the detector, and the rotating connection seat includes a first seat body and a second seat body respectively provided on the main controller and the detector, the first seat body and the second seat body are connected by connecting screws, and the fitting surface between the first seat body and the second seat body is provided with anti-slip grooves. As a preferred solution of the present application, loosening the connecting screws can adjust the installation angle of the main controller and the detector, and tightening the connecting screws prevents the main controller and the detector from rotating through the anti-slip grooves.

[0012] Preferably, in the present application, a large circular machine yarn length measuring device, the rotation signal generator is a magnetic ring coaxially arranged at the end of the spindle, the magnetic ring is provided with a pair of magnetic poles cut along the radial direction, the rotation signal sensing module includes a group of Hall sensors arranged in a surrounding manner and a decoding chip connected to the Hall sensor signal, a group of the Hall sensors surround the periphery of the magnetic ring, and the decoding chip is connected to the slave MCU control module in communication. A group of Hall sensors arranged in a surrounding manner and the decoding chip form an external linear Hall sensor, and the more Hall sensors there are, the higher the detection accuracy.

[0013] Preferably, a large circular machine yarn length measuring device in the present application includes a dual-inductance rotation position sensor, and the dual-inductance rotation position sensor includes a coil circuit board and a detection circuit board corresponding to the rotation signal generator and the rotation signal sensing module respectively; the coil circuit board is arranged at the lower end of the main shaft, the detection circuit board is communicatively connected to the slave MCU control module, and the coil circuit board and the detection circuit board are arranged relative to each other.

[0014] Furthermore, in the present application, a circular yarn length measuring device is provided, wherein the housing comprises an upper housing and a lower housing connected to each other in the axial direction of the spindle, a bearing is provided in the upper housing, the outer ring of the bearing is tightly matched with the inner wall of the upper housing, the spindle is passed through the inner ring of the bearing, a limiting boss is provided on the spindle, and the limiting boss is fitted to the lower end of the inner ring of the bearing;

[0015] The lower housing is integrally provided with a pair of vertically arranged support plates, the support plates are attached to the lower end of the outer ring of the bearing, and the circuit board corresponding to the slave MCU control module is embedded between the pair of support plates. As a preferred solution of the present application, it has the advantage of compact structure.

[0016] Furthermore, in the present application, a large circular machine yarn length measuring device is provided with a battery in the main controller, and the battery is used to power the electronic components arranged on the main controller. As a preferred solution of the present application, the main controller does not require an external power supply, so it can be used as a detection tool alone and placed on multiple machines for debugging, thereby improving the convenience of use.

[0017] Furthermore, in the present application, a circular yarn length measuring device is provided, wherein a light guide lampshade is disposed outside the main controller.

[0018] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0019] 1. The utility model provides a large circular knitting machine yarn length measuring device, which can centrally display the yarn conveying parameters on each detector, and has the advantage of convenient reading. In addition, since a slave MCU control module with a storage chip is provided in the detector, the yarn conveying parameters on each detector can be recorded. When the main controller fails and is replaced, the yarn conveying parameters corresponding to each detector can be directly read and displayed, and it has the advantage of good reliability.

[0020] 2. The utility model provides a large circular machine yarn length measuring device, wherein a plurality of the detectors are arranged at intervals, and communication connection is achieved between adjacent detectors by plugging communication cables in a 485 communication interface, which has the advantage of convenient wiring and an automatic networking function, realizing plug-and-play and automatic sorting in the order of communication serial connection, without the need to set the address of the measuring tool by oneself. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of a circular yarn length measuring device in one embodiment of the present application;

[0022] Figure 2 for Figure 1 A partial enlarged view of the area A in the middle circle;

[0023] Figure 3 A cross-sectional view of a detector in one embodiment of the present application;

[0024] Figure 4 An exploded diagram of the components of the main controller in one embodiment of the present application;

[0025] Figure 5 This is an exploded view of the components of the rotating connecting seat in one embodiment of the present application;

[0026] Figure 6 This is a schematic diagram of a control module of a circular yarn length measuring device in one embodiment of the present application;

[0027] Figure 7 A longitudinal cross-sectional view of a region corresponding to the main axis in a housing in an embodiment of the present application;

[0028] Figure 8 A transverse cross-sectional view of the position of the corresponding magnetic ring in the shell in one embodiment of the present application;

[0029] Fig. 9 A schematic diagram of presetting a starting point for a pair of Hall sensors in one embodiment of the present application;

[0030] Fig.10 Schematic diagram of interlaced waveforms corresponding to four Hall sensors in one embodiment of the present application.

[0031] In the figure: 1-rotation input component; 11-spindle; 111-limiting boss; 1101-magnetic ring; 1102-coil circuit board; 12-pulley; 2-housing; 21-upper housing; 22-lower housing; 221-support plate; 23-bearing; 33-slave MCU control module; 331-Hall sensor; 332-detection circuit board; 4-main controller; 41-display screen; 42-battery; 43-light guide lamp cover; 5-main MCU control module; 6-detector; 7-zero position detection sensor; 8-rotation connecting seat; 81-first seat body; 82-second seat body; 83-connecting screw. DETAILED DESCRIPTION

[0032] Example 1

[0033] Combination Figure 1 , Figure 3 and Figure 4 A large circular yarn length measuring device is shown, comprising:

[0034] At least one detector 6, the detector 6 includes a rotation input component 1, the rotation input component 1 includes a main shaft 11, and a pulley 12 is installed on the main shaft 11; the detector 6 also includes a housing 2, and the main shaft 11 is rotatably installed on the housing 2; a rotation signal generator is provided on the main shaft 11, and a rotation signal sensing module is provided in the housing 2 corresponding to the rotation signal generator; a slave MCU control module 33 is provided in the housing 2, and the slave MCU control module 33 includes a storage chip, and the slave MCU control module 33 is communicatively connected with the rotation signal sensing module;

[0035] A main controller 4, wherein a display screen 41 is provided on the main controller 4, the main controller 4 is arranged outside the housing 2, a main MCU control module 5 is provided inside the main controller 4, the display screen 41 is communicatively connected with the main MCU control module 5, and the main MCU control module 5 is communicatively connected with the slave MCU control module 33;

[0036] The slave MCU control module 33 is communicatively connected with the zero position detection sensor 7 installed on the fixed part of the large circular knitting machine. The zero position detection sensor 7 is used to detect whether the large circular knitting machine main body rotor rotates to a preset zero position. The zero position detection sensor 7 is used to send a zero position signal to the slave MCU control module 33 when detecting that the large circular knitting machine main body rotor rotates to a preset zero position.

[0037] Based on the above structure, the principle of a circular knitting machine yarn length measuring device in the present application is: the detection probe of the zero position detection sensor 7 is installed on the fixed component of the circular knitting machine, that is, the preset zero position, the zero position detection sensor 7 can be a photoelectric sensor or a Hall sensor, and the corresponding photoelectric detection area or magnetic block is provided on the rotating component of the circular knitting machine. When the knitting machine is working, the transmission belt drives the pulley 12 on the yarn feeding device and the detector 6 to rotate synchronously, and the pulley 12 drives the main shaft 11 to rotate. The rotation signal sensing module is used to detect the rotation displacement of the main shaft 11 during the large circular knitting machine rotates one circle. Specifically, the slave MCU control module 33 is connected to the zero position detection sensor 7 in communication; the zero position detection sensor 7 is used to detect whether the large circular knitting machine rotates to the preset zero position. When the zero position detection sensor 7 detects that the large circular knitting machine rotates to the zero position, the slave MCU control module 33 starts to receive the rotation displacement of the main shaft 11 detected by the rotation signal sensing module until the zero position detection sensor 7 detects the zero position again, that is, the large circular knitting machine rotates one circle, and the rotation displacement of the main shaft 11 in this process is recorded. The storage chip is used to store the yarn conveying parameters, and the display screen 41 is used to display the yarn conveying parameters corresponding to each detector 6. The yarn conveying parameters are converted according to the rotation displacement of the main shaft 11 during one rotation of the large circular knitting machine. In this embodiment, the yarn conveying parameters include: yarn length per revolution, yarn length per hundred needles, and yarn speed. The yarn length per revolution is the length of the yarn conveyed when the large circular knitting machine rotates one circle; the yarn length per hundred needles is based on the unfolded length of 100 knitted fabric coils as the process standard, which is called the yarn length per hundred needles. The calculation formula of the yarn length per hundred needles disclosed in the Chinese utility model patent with publication number CN 216809140 U can be referred to; the yarn speed is the linear speed of the yarn conveying. Specifically, the slave MCU control module 33 also includes an alarm module. When the yarn conveying parameters exceed the preset value, the alarm module sends a signal to control the alarm to send an (sound, light) alarm signal and / or control the equipment to shut down.

[0038] Therefore, a large circular machine yarn length measuring device in the present application can centrally display the yarn conveying parameters on each detector 6, which has the advantage of convenient reading. In addition, since a slave MCU control module 33 with a storage chip is provided in the detector 6, the yarn conveying parameters on each detector 6 can be recorded. When the main controller 4 fails, after replacement, the yarn conveying parameters corresponding to each detector 6 can be directly read and displayed, which has the advantage of good reliability. Specifically, the display screen 41 adopts an LED display screen, which can display 5 groups of data at the same time, which is convenient for data reading. The main controller 4 is also provided with operation buttons.

[0039] Combination Figure 1As shown, in this embodiment, at least one pair of first 485 communication interfaces are provided on the detector 6, and the slave MCU control modules 33 in the detectors 6 are connected in series through the first 485 communication interfaces. The main controller 4 is provided with a second 485 communication interface corresponding to the detector 6, and the main MCU control module 5 is connected to the slave MCU control module 33 through the first 485 communication interface and the second 485 communication interface. Several detectors 6 are arranged in intervals, and adjacent detectors 6 are connected in communication by plugging communication cables in the 485 communication interface, which has the advantage of convenient wiring and automatic networking function, realizing plug-and-play and automatic sorting in the order of communication series connection, without setting the address of the measuring tool by oneself. Specifically, the 485 communication interface model adopts the type C interface.

[0040] Combination Figure 1 As shown, in this embodiment, the main controller 4 is provided with a communication interface corresponding to the zero position detection sensor 7, and the zero position detection sensor 7 is connected to the zero position communication interface and is communicated with the main MCU control module 5. If the zero position detection sensor 7 is directly connected to the detector 6, a communication interface needs to be reserved on the detector 6, and since only one zero position detection sensor 7 is required, the interface on the detector 6 that is not connected to the zero position detection sensor 7 will be wasted. Therefore, the zero position detection sensor 7 is connected to the main controller 4 and is communicated with the main MCU control module 5. Since the main MCU control module 5 is communicated with the slave MCU control module 33 through the 485 communication interface, the zero position detection sensor 7 can be communicated with the slave MCU control module 33, thereby reducing the number of interfaces and reducing the overall manufacturing cost.

[0041] Combination Figure 2 and Figure 5 As shown, in this embodiment, the main controller 4 and the detector 6 are detachably connected. It has the advantage of convenient installation, and there is no need to set a structure for installing the main controller 4 on the large circular machine. Specifically, a rotating connecting seat 8 is provided between the main controller 4 and the detector 6, and the rotating connecting seat 8 includes a first seat body 81 and a second seat body 82 respectively provided on the main controller 4 and the detector 6, and the first seat body 81 and the second seat body 82 are connected by connecting screws 83, and anti-slip grooves are provided on the fitting surface between the first seat body 81 and the second seat body 82. Loosening the connecting screws 83 can adjust the installation angle of the main controller 4 and the detector 6, and tightening the connecting screws 83 prevents the main controller 4 and the detector 6 from rotating by the anti-slip grooves.

[0042] Combination Figure 3As shown, in this embodiment, the housing 2 includes an upper housing 21 and a lower housing 22 connected to each other in the axial direction of the main shaft 11. A pair of coaxially arranged bearings 23 are arranged in the upper housing 21. The outer ring of the bearing 23 is tightly matched with the inner wall of the upper housing 21. The main shaft 11 is inserted into the inner ring of the bearing 23. The main shaft 11 is provided with a limiting boss 111, and the limiting boss 111 is attached to the lower end of the inner ring of the bearing 23. A pair of vertically arranged support plates 221 are integrally provided on the lower housing 22. The cross section of the support plate 221 is in an arc shape adapted to the outer ring of the bearing 23. The support plate 221 is attached to the lower end of the outer ring of the bearing 23. The circuit board corresponding to the slave MCU control module 33 is installed on the lower housing 22, and the circuit board corresponding to the slave MCU control module 33 is embedded between the pair of support plates 221. It has the advantage of compact structure.

[0043] Combination Figure 4 As shown, in this embodiment, a battery 42 is provided inside the main controller 4, and the battery 42 is used to power the electronic components arranged on the main controller 4. The main controller 4 does not need an external power supply, so it can be placed on multiple machines as a detection tool for debugging, thereby improving the convenience of use. In this embodiment, a light guide lampshade 43 is provided outside the main controller 4. The light guide lampshade 43 is embedded in the four top corners of the main controller 4 housing.

[0044] Example 2

[0045] Based on Example 1, in this example, Figure 7 and Figure 8 As shown, the rotation signal generator is a magnetic ring 1101 coaxially arranged at the end of the main shaft 11, and the magnetic ring 1101 is provided with a pair of magnetic poles divided along the radial direction. The rotation signal sensing module is an external linear Hall sensor, and the external linear Hall sensor includes a group of Hall sensors 331 arranged in a surrounding manner and a decoding chip connected to the Hall sensor signal. A group of Hall sensors 331 surrounds the periphery of the magnetic ring, and the decoding chip is communicatively connected to the slave MCU control module 33.

[0046] When the main shaft 11 drives the magnetic ring 1101 to rotate, the external linear Hall sensor detects the changing trend of the magnetic field, and then transmits the obtained signal to the decoding chip for calculation; through the overlapping of the linear changes of the magnetic field detected by multiple Hall sensors, a very high detection accuracy can be obtained. The principle is: the waveform of a single linear Hall sensor detecting one circle is a single sine wave, and its detection accuracy is 1 / 360°. Multiple sensors will detect multiple waveforms, such as Figure 8 As shown, each waveform can have a preset start and end point in the program. Figure 8 The starting point and the end point correspond to the vertical line positions respectively to generate waveform interleaving, so that the interval of waveform interleaving of each sensor can be further subdivided to improve the detection accuracy of 1 / a*360°, where a is the number of sensors.

[0047] In this application, an external linear Hall sensor of model MT6709 is used. Specifically, a group of Hall sensors 331 has 4 sensors, which are evenly distributed in the circumferential direction and can generate the following Fig. 9 The waveforms shown are staggered, and the external linear Hall sensor and the slave MCU control module 33 are arranged on the same circuit board.

[0048] In this embodiment, the limiting boss 111 is a nut screwed onto the main shaft 11, and the magnetic ring 1101 is arranged below the nut. A threaded mounting shaft for mounting the nut is provided at the lower end of the main shaft 11, and a magnetic ring mounting shaft is extended below the threaded mounting shaft. The magnetic ring 1101 is sleeved and installed on the magnetic ring mounting shaft.

[0049] Example 3

[0050] On the basis of Example 1, this embodiment includes a dual-inductance rotation position sensor, which includes a coil circuit board 1102 and a detection circuit board 332 corresponding to the rotation signal generator and the rotation signal sensing module respectively; the coil circuit board 1102 is arranged at the lower end of the main shaft 11, the detection circuit board 332 is communicatively connected with the slave MCU control module 33, and the coil circuit board 1102 and the detection circuit board 332 are arranged relative to each other.

[0051] When the main shaft 11 rotates, the coil circuit board 1102 rotates accordingly, the coil on the detection circuit board 332 is energized to generate a magnetic field, the relative movement of the two sets of coils generates mutual inductance, and the magnetic field generates relative rotation. The detection chip is then used to detect the changes in the magnetic field to obtain detection data.

[0052] In this embodiment, the model of the dual inductor rotation position sensor is preferably NCS32100, and the coil circuit board 1102 is in a ring shape. The detection circuit board 332 is arranged on the circuit board where the slave MCU control module 33 is located.

[0053] In this embodiment, the limiting boss 111 is an annular gasket, and the annular gasket and the coil circuit board 1102 are mounted on the main shaft 11 from top to bottom. A screw is axially installed at the bottom of the main shaft 11, and the screw head on the screw contacts the coil circuit board 1102 to limit the bottom of the coil circuit board 1102.

[0054] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanation here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A large circular yarn length measuring device, characterized in that: include: At least one detector (6), the detector (6) comprising a rotation input component (1), the rotation input component (1) comprising a main shaft (11), the main shaft (11) being mounted with a pulley (12); the detector (6) further comprising a housing (2), the main shaft (11) being rotatably mounted on the housing (2); a rotation signal generator is provided on the main shaft (11), and a rotation signal sensing module is provided in the housing (2) corresponding to the rotation signal generator; a slave MCU control module (33) is provided in the housing (2), the slave MCU control module (33) comprising a storage chip, and the slave MCU control module (33) is communicatively connected with the rotation signal sensing module; A main controller (4), wherein a display screen (41) is provided on the main controller (4), the main controller (4) is arranged outside the housing (2), a main MCU control module (5) is provided inside the main controller (4), the display screen (41) is communicatively connected to the main MCU control module (5), and the main MCU control module (5) is communicatively connected to the slave MCU control module (33).

2. A circular yarn length measuring device according to claim 1, characterized in that: The rotation signal generator is a magnetic ring (1101) coaxially arranged at the end of the main shaft (11), and the magnetic ring (1101) is provided with a pair of magnetic poles cut along the radial direction. The rotation signal sensing module is an external linear Hall sensor including a group of Hall sensors arranged in a surrounding manner and a decoding chip connected to the Hall sensor signal. The group of Hall sensors surrounds the outer periphery of the magnetic ring, and the decoding chip is communicatively connected to the slave MCU control module (33).

3. A circular yarn length measuring device according to claim 1, characterized in that: It comprises a dual-inductance rotation position sensor, the dual-inductance rotation position sensor comprises a coil circuit board (1102) and a detection circuit board (332) respectively belonging to the rotation signal generator and the rotation signal sensing module; The coil circuit board (1102) is arranged at the lower end of the main shaft (11), the detection circuit board (332) is communicatively connected with the slave MCU control module (33), and the coil circuit board (1102) and the detection circuit board (332) are arranged relative to each other.

4. A circular yarn length measuring device according to claim 1, characterized in that: The detector (6) is provided with at least one pair of first 485 communication interfaces, and the slave MCU control modules (33) in the detectors (6) are connected in series in pairs through the first 485 communication interfaces. The main controller (4) is provided with a second 485 communication interface corresponding to the detector (6), and the main MCU control module (5) is connected in communication with the slave MCU control module (33) through the first 485 communication interface and the second 485 communication interface.

5. The circular yarn length measuring device according to claim 1, characterized in that: The slave MCU control module (33) is in communication connection with a zero position detection sensor (7) mounted on a fixed component of the circular knitting machine, and the zero position detection sensor (7) is used to detect that the main rotor of the circular knitting machine rotates to a preset zero position and sends a zero position signal to the slave MCU control module (33).

6. A circular yarn length measuring device according to claim 5, characterized in that: The main controller (4) is provided with a zero position communication interface corresponding to the zero position detection sensor (7), and the zero position detection sensor (7) is connected to the zero position communication interface to communicate with the main MCU control module (5).

7. The circular yarn length measuring device according to claim 1, characterized in that: The main controller (4) and the detector (6) are detachably connected; a rotating connection seat (8) is provided between the main controller (4) and the detector (6); the rotating connection seat (8) comprises a first seat body (81) and a second seat body (82) respectively provided on the main controller (4) and the detector (6); the first seat body (81) and the second seat body (82) are connected via a connecting screw (83); and anti-slip grooves are provided on the fitting surface between the first seat body (81) and the second seat body (82).

8. The circular yarn length measuring device according to claim 1, characterized in that: The housing (2) comprises an upper housing (21) and a lower housing (22) which are connected to each other in the axial direction of the main shaft (11); a bearing (23) is provided in the upper housing (21); the outer ring of the bearing (23) is tightly matched with the inner wall of the upper housing (21); the main shaft (11) is inserted into the inner ring of the bearing (23); a limiting boss (111) is provided on the main shaft (11); the limiting boss (111) is fitted to the lower end of the inner ring of the bearing (23); A pair of vertically arranged support plates (221) are integrally provided on the lower shell (22), and the support plates (221) are fitted to the lower ends of the outer rings of the bearings (23).

9. A circular yarn length measuring device according to claim 8, characterized in that: The circuit board corresponding to the slave MCU control module (33) is embedded between a pair of support plates (221).

10. The circular yarn length measuring device according to claim 1, characterized in that: A battery (42) is provided in the main controller (4), and the battery (42) is used to supply power to electronic devices arranged on the main controller (4).

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