Tension detection yarn feeder and tension feedback yarn feeding control system

Abstract

The present invention relates to the technical field of textile machinery, and provides a yarn feeding device for tension detection and a tension feedback yarn feeding control system. The yarn feeding device for tension detection includes a support. A housing is arranged at the right bottom of the support. A tension sensor is arranged inside the housing. A yarn outlet support is arranged on the left side of the tension sensor. A first yarn outlet porcelain eye is fixed on the yarn outlet support. A second yarn outlet porcelain eye is arranged on the right side of the tension sensor. A tension detection circuit board is arranged in the housing. Among them, the tension sensor is arranged obliquely, and its strain gauge is located on the side close to the first yarn outlet porcelain eye, and the free end of the strain gauge is located at the bottom. The present invention can accurately detect the tension data of the yarn while feeding the yarn, and transmit the tension data to the knitting machine in real time. The main controller of the knitting machine controls the electric triangle component to drive the triangle to adjust the up and down position, so as to adjust the yarn feeding amount and tension of the yarn.

Description

Technical Field

[0001] The present invention relates to the technical field of textile machinery, and particularly to a yarn feeding device for tension detection and a tension feedback yarn feeding control system. Background Art

[0002] In the prior art, when producing fabric varieties with different tightness, according to a new order, a circular knitting machine generally sends an instruction to a yarn feeding motor through a main controller, controls the belt to rotate by driving the belt according to a set yarn feeding length, the belt drives a yarn feeding device to feed yarn, and the knitting needles of the needle cylinder perform knitting, and slowly adjusts the tightness of the produced fabric until the yarn feeding length completely meets the requirements. During this process, the yarn feeding tension of the circular knitting machine is generally judged manually by experience through the sense of hand, or measured by a special instrument for measuring yarn tension. However, manual judgment by experience often has differences and inaccuracies in the tension judgment of each strand of yarn, and the special instrument is expensive, with one equipped for each line, resulting in a sharp increase in cost. In addition, after obtaining the yarn tension data, in the prior art, the upper and lower positions of the triangle are mainly adjusted manually by adjusting the dial on the triangle seat to adjust the yarn feeding amount of the yarn. This adjustment process requires continuous measurement of the tension data, and the adjustment process is cumbersome and time-consuming. There is a need to propose a yarn feeding device for tension detection that can detect the tension of the yarn while feeding the yarn. In cooperation with a new structure such as the main controller of the circular knitting machine and an electric adjustment triangle, it can reduce the time for switching fabric varieties on the production line, ensure automatic control of the fabric quality during the production process, and reduce the need for machine adjustment during the production process, greatly improving the overall automation level of the knitting machinery. Summary of the Invention

[0003] Therefore, in view of the above problems, the present invention proposes a yarn feeding device for tension detection that can accurately detect the yarn tension data while feeding the yarn, and provides a tension feedback yarn feeding control system that measures the yarn tension and transmits the tension data to the knitting machinery in real time, and the main controller of the knitting machinery controls an electric triangle component to drive the triangle to adjust the upper and lower positions, so as to adjust the yarn feeding amount and the yarn tension, and reduce the time for switching fabric varieties, so as to solve the problems mentioned in the background art.

[0004] To solve this technical problem, the present invention adopts the following solution: a yarn feeding device with tension detection, comprising a support. A rotating shaft is vertically arranged on the support. A fixed wheel is installed at the top of the rotating shaft on the support, and a yarn feeding wheel is installed below the rotating shaft on the support. An inlet yarn support is installed on the left side of the support. An inlet yarn porcelain eye 1 and an inlet yarn porcelain eye 2 are respectively installed at the top and bottom of the inlet yarn support. A yarn scraping blade is installed in the middle of the inlet yarn support. An elastic wire clamp is arranged below the yarn scraping blade. A housing is arranged at the bottom right of the support. A tension sensor is arranged inside the housing. An outlet yarn support is arranged on the left side of the tension sensor. An outlet yarn porcelain eye 1 is fixed on the outlet yarn support. An outlet yarn porcelain eye 2 is arranged on the right side of the tension sensor. A tension detection circuit board is arranged inside the housing. Among them, the tension sensor is installed in an inclined manner, and its strain gauge is located on the side close to the outlet yarn porcelain eye 1, and the free end of the strain gauge is at the bottom.

[0005] Further, a ceramic part is fixed at the top of the free end of the strain gauge, and the top surface of the ceramic part is arranged in an arc structure.

[0006] Further, the strain gauge is made of a high-elastic steel sheet.

[0007] Further, the tension detection circuit board includes a central control unit, a tension interface circuit, a power supply unit, a display circuit board and a communication module. The tension interface circuit, the display circuit board and the communication module are connected to the central control unit. The tension interface circuit is used to connect the tension sensor to collect the tension data of the yarn. The display circuit board is used to display the working data of the yarn feeding device with tension detection and perform function operations on the device. The power supply unit supplies power to the yarn feeding device with tension detection.

[0008] Further, the communication module can be an RS485 communication module or a CAN bus communication module.

[0009] Further, the central control unit is respectively connected to a DI processing unit and a DO processing unit. The DI processing unit and the DO processing unit respectively reserve DI interfaces and DO interfaces, and can realize signal input and alarm output.

[0010] Further, the central control unit is connected to a USB interface module, which is used for a computer to directly connect to the device to perform data adjustment, modification and download.

[0011] Further, it further includes a power supply communication interface, and the power supply communication interface is a power supply & communication interface, which includes 8 pins such as 24V power supply, 485 communication, DI, and DO.

[0012] Further, the display circuit board includes a liquid crystal display interface circuit, a display module, and a button control circuit; the liquid crystal display interface circuit is respectively connected to the display module and the button control circuit; the display module is used to provide an operation interface and display the working data of the tension detection yarn feeder; the button control circuit is used to operate the device functions.

[0013] Further, it further includes a download port circuit and a debugging port circuit. The download port circuit provides a data download interface during mass production, and the debugging port circuit serves as a reserved interface for debugging operations.

[0014] The present invention also provides a tension feedback yarn feeding control system, which includes a plurality of tension detection yarn feeders. The plurality of tension detection yarn feeders are respectively connected to the main controller through 485 communication mode or CAN bus mode, and the main controller is connected with a plurality of electric triangle components.

[0015] Further, the electric triangle component includes a triangle mounting seat. An installation groove is formed on the front side of the triangle mounting seat. Slide grooves are respectively arranged on both sides of the installation groove. A slider is arranged in the installation groove. Slide bars are respectively convexly provided on both sides of the slider and are slidably connected with the corresponding slide grooves in a matching manner. A micro motor is fixed on the rear side of the triangle mounting seat. The output shaft of the micro motor penetrates into the installation groove, and a gear is fixed to the end thereof. A rack is fixed to the rear side surface of the slider, and the gear is meshed with the rack. A plurality of triangles are fixedly connected to the front side of the slider from top to bottom by bolts.

[0016] Further, the main controller is connected with 4 CAN buses or 485 buses, and each CAN bus or 485 bus is respectively connected with N tension detection yarn feeders.

[0017] Further, the maximum value of N is 32.

[0018] Beneficial effects

[0019] Compared with the prior art, the present invention has at least the following advantages: A tension sensor is fixed inside the housing provided on one side at the bottom of the yarn feeding device for tension detection. The tension sensor is located on the yarn feeding path to detect the tension of the yarn. The tension detection data is transmitted to the single-chip microcomputer of the central control unit through the tension interface circuit of the tension detection circuit board. The single-chip microcomputer receives the detection data of the tension sensor, processes the data, and transmits the processed data to the main controller of the knitting device through the communication module. When it is necessary to switch to fabric products with different tightness, the yarn feeding motor of the knitting machine drives the belt to rotate to control the yarn feeding amount of the yarn feeding device. The knitting machine obtains the tension data of each yarn, controls the up and down position adjustment of the cams of each corresponding electric cam component, and controls the yarn feeding amount, so that while realizing the conversion of fabric products, the yarn tension is within the allowable and reliable range, enabling the knitting machine to realize functions such as automatic conversion of fabrics with different tightness and automatic production. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the yarn feeding device for tension detection of the present invention;

[0021] Figure 2 is a schematic cross-sectional structural diagram of the yarn feeding device for tension detection of the present invention;

[0022] Figure 3 is a schematic structural diagram of the tension sensor in an embodiment of the present invention;

[0023] Figure 4 is a schematic structural diagram of the electric cam component in an embodiment of the present invention;

[0024] Figure 5 is a schematic transverse cross-sectional view of the electric cam component in an embodiment of the present invention;

[0025] Figure 6 is a structural block diagram of the tension detection circuit board in an embodiment of the present invention;

[0026] Figure 7 is a circuit schematic diagram of the single-chip microcomputer in an embodiment of the present invention;

[0027] Figure 8 is a circuit schematic diagram of the tension interface circuit in an embodiment of the present invention;

[0028] Figure 9 is a circuit schematic diagram of the DI processing unit and the DO processing unit in an embodiment of the present invention;

[0029] Figure 10 is a circuit schematic diagram of the power supply communication interface in an embodiment of the present invention;

[0030] Figure 11 is a circuit schematic diagram of the RS485 communication module in an embodiment of the present invention;

[0031] Figure 12 is the circuit schematic diagram of the USB interface module in the embodiment of the present invention;

[0032] Figure 13 is the circuit schematic diagram of the download port circuit and the debug interface circuit in the embodiment of the present invention;

[0033] Figure 14 is the circuit schematic diagram of the display screen circuit board in the embodiment of the present invention;

[0034] Figure 15 is the circuit schematic diagram of the bridge rectifier circuit and the power supply in the present invention.

[0035] In the figure: 1 - support; 2 - yarn feeding bracket; 2a - vertical plate 1; 2b - horizontal plate; 2c - vertical plate 2; 2d - upper end plate; 2e - convex plate; 2f - side plate; 2g - bottom plate; 2h - lower end plate; 3 - yarn feeding porcelain eye 1; 4 - yarn scraping blade; 5 - spring wire clamp; 6 - front probe; 7 - yarn feeding wheel; 8 - yarn output porcelain eye 1; 9 - tension sensor; 90 - strain gauge; 91 - force-bearing ceramic part; 92 - signal processing circuit board; 10 - display screen; 11 - key; 12 - yarn feeding porcelain eye 2; 13 - yarn output bracket; 14 - yarn output porcelain eye 2; 15 - housing; 16 - circuit connection plug; 17 - electronic control triangle; 170 - triangle mounting seat; 171 - micro motor; 172 - slider; 173 - triangle; 174 - mounting groove; 175 - rack; 176 - gear; 177 - slide bar; 178 - slide groove; 18 - rotating shaft; 19 - bushing; 20 - fixed wheel; 21 - DI processing unit; 22 - DO processing unit; 23 - download port circuit; 24 - debug port circuit; 25 - display module; 26 - key control circuit; 27 - liquid crystal display screen interface circuit; 28 - indicator light module; 29 - bridge rectifier circuit; 30 - 24V to 5V power conversion circuit; 31 - power voltage detection circuit; 32 - power failure detection circuit; 33 - 5V to 3.3V power conversion circuit; 34 - static electricity export circuit. Specific Embodiments

[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] Refer to Figures 1 - 15, The yarn feeding device for tension detection includes a support 1. The support 1 is vertically provided with a rotating shaft 18. At the top of the support 1, the rotating shaft 18 is installed with two fixed wheels 20. Below the support 1, the rotating shaft 18 is installed with a yarn feeding wheel 7. Among them, a bushing 19 is provided between the rotating shaft 18, the fixed wheels 20, the yarn feeding wheel 7 and the support 1. When multiple yarn feeding devices for tension detection are installed around a circular knitting machine, a belt is arranged on the outside of the fixed wheels of multiple yarn feeding devices for tension detection. The belt is driven by a yarn feeding motor to rotate, so that the belt drives the fixed wheel 20 to rotate, and synchronous rotation is achieved between the fixed wheel 20 and the yarn feeding wheel 7.

[0038] On the left side of the support 1, a yarn inlet support 2 is installed. The yarn inlet support 2 includes a vertical plate 2a fixed to the support 1. The top of the vertical plate 2a is connected with a horizontal plate 2b. The top surface of the end of the horizontal plate 2b is connected with a vertical plate 2c. The top of the vertical plate 2c is connected with an inclined upper end plate 2d. The upper end plate 2d is installed with a first yarn inlet porcelain eye 3. The horizontal plate 2a extends outward and even has a convex plate. The convex plate 2e is located in the middle of the yarn inlet support 2 and is installed with a yarn scraping blade 4. On one side of the vertical plate 2a, a side plate 2f is fixed. The side plate 2f is installed with an elastic wire clamp 5. The elastic wire clamp 5 is located below the yarn scraping blade 4. At the bottom of the vertical plate 2a, a lower end plate 2h is fixed. At the bottom of the lower end plate 2h, a bottom plate 2g is fixed. The bottom plate 2g is installed with a second yarn inlet porcelain eye 12. A notch is provided on one side of the lower end plate 2h where the bottom plate 2g is located. The support 1 is rotatably connected with a front probe rod 6. A display screen 10 and a key 11 are provided on the housing 15.

[0039] As Figure 1 and Figure 2 As shown, a housing 15 is provided at the bottom right of the support 1. A tension sensor 9 is arranged inside the housing 1. A yarn outlet support 13 is arranged on the left side of the tension sensor 9. A first yarn outlet porcelain eye 8 is fixed on the yarn outlet support 13. A second yarn outlet porcelain eye 14 is arranged on the right side of the tension sensor 9; a tension detection circuit board is arranged inside the housing 1. In the technical solution of the present invention, the tension sensor 9 is installed in an inclined manner, and its strain gauge is located on the side close to the first yarn outlet porcelain eye 8. The free end of the strain gauge 90 is at the bottom, and a ceramic part 91 is fixed on the top of the free end of the strain gauge 90. The top surface of the ceramic part 91 is arranged in an arc structure, so that the ceramic part 91 is in a semi-cylindrical structure. In this embodiment, an arc-shaped groove adapted to the ceramic part 91 is provided on the bottom surface of the housing 15, and the yarn passes through the gap between the arc-shaped groove and the ceramic part 15. The strain gauge is made of high-elastic steel sheet. Preferably, two jacks are provided at the free end of the strain gauge, and fixing columns corresponding to the two jacks are provided at the bottom of the ceramic part 91, and the fixing columns are inserted into the jacks, which can strengthen the firm connection between the ceramic part 91 and the strain gauge.

[0040] In a specific application, the yarn enters from the first yarn inlet porcelain eye 3, sequentially passes through the yarn scraping blade 4 and the elastic wire clamp 5, and then enters the second yarn inlet porcelain eye 12 from the bottom of the front probe 6. The yarn passing through the second yarn inlet porcelain eye 12 is wound around the yarn delivery wheel 7, and finally passes through the first yarn outlet porcelain eye 8, the ceramic part 91 and the second yarn outlet porcelain eye 14. The yarn output by the second yarn outlet porcelain eye 4 is guided by the yarn guide base of the circular knitting machine and knitted by the knitting needles on the needle cylinder. With the change of the yarn conveying tension, the free end of the strain gauge will generate displacement due to the entanglement between the yarn and the ceramic part 91, causing the strain gauge 90 to produce elastic changes up and down. The signal processing circuit board 92 of the tension sensor 9 amplifies the electrical signal of the strain gauge and outputs it to the tension detection circuit board.

[0041] As Figure 6 shown, the tension detection circuit board includes a central control unit, a tension interface circuit, a power supply unit, a display circuit board and a communication module; the tension interface circuit, the display circuit board and the communication module are connected to the central control unit; the tension interface circuit is used to connect the tension sensor to collect the tension of the yarn; the display circuit board is used to display the working data of the tension detection yarn feeder and perform function operations on the device, and the power supply unit supplies power to the tension detection yarn feeder.

[0042] In this embodiment, as Figure 7 shown, the central control unit uses a single-chip microcomputer of model M483SIDAE and its peripheral circuits. As Figure 8 shown, the tension interface circuit includes a 2*4 pin header socket J3. The 3rd and 5th pins of the pin header socket J3 are respectively connected to the 56th and 55th pins of the single-chip microcomputer through resistors, and the tension sensor 9 is connected through the pin header socket J3.

[0043] The communication module can be an RS485 communication module or a CAN bus communication module. In this embodiment, the communication module is an RS485 communication module. As Figure 11 shown, the RS485 communication module includes an RS-485 transceiver of model SP485 and its peripheral circuits. The 35th and 36th pins of the single-chip microcomputer are respectively connected to the 4th and 1st pins of the SP485 transceiver. Through the RS485 communication module, the tension detection yarn feeder communicates with the upper-level device (i.e., the knitting machine) in the form of 485 communication for data communication.

[0044] In this embodiment, the 64th and 63rd pins of the single-chip microcomputer are respectively connected to a DI processing unit 1 and a DO processing unit 2. The DI processing unit 1 and the DO processing unit 2 respectively reserve DI and DO interfaces, which can realize signal input and alarm output. Among them, the DI interface is a data input interface, and the DO interface is a data output interface. As Figure 9As shown, the DI processing unit 1 is a data input processing unit, which includes an AC input optocoupler of model EL3H4 and its peripheral circuit. The DO processing unit 2 is a data output processing unit, which includes a relay of model KAQY214STLD and its peripheral circuit.

[0045] In this embodiment, the central control unit is connected with a USB interface module for directly connecting a computer to the device to perform data adjustment, modification, and download. The USB interface module, as Figure 12 shown, adopts mini_USB. The first, second, third, and fourth pins of mini_USB are respectively connected to the 43rd, 44th, 46th, and 48th pins of the single-chip microcomputer. This embodiment also includes a power supply communication interface, which is a power supply & communication interface and includes 8 pins such as 24V power supply, 485 communication, DI, and DO.

[0046] In this embodiment, the display screen circuit board includes a liquid crystal display screen interface circuit 7, a display module 5, and a key control circuit 6. The liquid crystal display screen interface circuit is respectively connected to the display module and the key control circuit. The display module is used to provide an operation interface and display the working data of the tension detection yarn feeder. The key control circuit is used to operate the functions of the device, such as calibration and zero clearing of the sensor, setting of communication parameters, and parameter adjustment of the display screen. Among them, the setting of communication parameters includes setting the baud rate and node number. It should be noted that the node number is the number of this tension detection yarn feeder. The parameter setting of the display screen includes display screen brightness, positive and negative colors, rotation, screen-on time, etc. The display screen interface circuit 7 is connected to the single-chip microcomputer. Preferably, the display screen circuit board further includes an indicator light module 8, which is used for the status indicator function of the display screen circuit board.

[0047] In this embodiment, the tension detection circuit board further includes a download port circuit 3 and a debugging port circuit 4. The download port circuit 3 provides a data download interface during mass production, and the debugging port circuit 4 serves as a reserved interface for debugging operations.

[0048] In the specific implementation process, the tension sensor detects the tension of the yarn and transmits the data to the single-chip microcomputer of the central control unit through the tension interface circuit. The single-chip microcomputer receives the detection data of the tension sensor, processes the data, and transmits the processed data in a packet through the communication module to the upper-level control device.

[0049] This embodiment is powered by a power supply unit, which includes a 24V-to-5V power conversion circuit, a power voltage detection circuit, a power loss detection circuit, and a 5V-to-3.3V power conversion circuit. The tension detection yarn feeder is externally connected to an AC / DC 9V or 24V power supply, and after being rectified by a bridge rectifier circuit, it is input into the 24V-to-5V power conversion circuit, the power voltage detection circuit, and the power loss detection circuit. The 24V-to-5V power conversion circuit converts the externally input AC / DC 24V into DC 5V. The power voltage detection circuit is used to detect the voltage at the power input end, and the power loss detection circuit is used to detect the voltage at the 5V output end. Preferably, the power supply unit further includes an electrostatic discharge circuit 14 to discharge the static electricity of the tension detection yarn feeder and avoid problems such as yarn winding caused by static electricity accumulation.

[0050] The present invention also provides a tension feedback yarn feeding control system, which includes a plurality of the above-mentioned tension detection yarn feeders. The plurality of tension detection yarn feeders are respectively connected to the main controller of the knitting machine through 485 communication or CAN bus. Each tension detection yarn feeder is correspondingly provided with a node number, and each node number corresponds to the tension data of one yarn. The tension data of the yarn includes the real-time value of the yarn, the maximum value, the minimum value, and the average value of one measurement cycle. The single-chip microcomputer compares the obtained yarn tension data with the preset value, can quickly judge whether the yarn is broken, and the tension detection yarn feeder can give an alarm for broken yarn; it can also give an alarm for hook line and alarm for tension range according to the tension data.

[0051] In this embodiment, the main controller is connected with 4 CAN buses or 485 buses, and each CAN bus or 485 bus is respectively connected with 32 tension detection yarn feeders.

[0052] The main controller is connected with 32 electric triangle components 17. The electric triangle component 17 includes a triangle mounting seat 170. An installation groove 174 is formed on the front side of the triangle mounting seat 170. Slide grooves 178 are respectively arranged on both sides of the installation groove 174. A slider 172 is arranged in the installation groove 174. Slide bars 177 that are slidably connected to the slide grooves 178 in a matching manner are respectively convexly provided on both sides of the slider 172. A micro motor 171 is fixed to the rear side of the triangle mounting seat 170. The output shaft of the micro motor 171 penetrates into the installation groove 174, and a gear 176 is fixed to its end. A rack 175 is fixed to the rear side surface of the slider 172. The gear 176 is meshed with the rack 175. A plurality of triangles 173 are fixed to the front side of the slider 172 from top to bottom by bolts.

[0053] In specific applications, it is necessary to convert and produce cloth pieces with different tightness levels without stopping the machine. The main controller drives the yarn feeding motor of the circular knitting machine to operate at a set speed according to the required yarn feeding length of the fabric product to be knitted. The yarn feeding motor drives the belt to rotate, driving the fixed wheel of the tension detection yarn feeder to rotate, and the yarn feeding wheel rotates synchronously to feed the yarn. The faster the yarn feeding motor rotates, the faster the yarn feeding wheel rotates, and the faster the yarn is fed. Conversely, the slower the yarn feeding motor rotates, the slower the yarn feeding wheel rotates, and the slower the yarn is fed.

[0054] The knitting needles installed on the cylinder of the circular knitting machine perform knitting actions along the tracks of the cams, slowly adjusting the tightness of the fabric. However, the tension of the yarn must be within the set range during this process to prevent the yarn from being too loose. During the adjustment process, the tension sensor of the tension detection yarn feeder that conveys the yarn monitors the tension of the yarn and transmits it to the single-chip microcomputer. The single-chip microcomputer processes the data and transmits the processed tension data to the main controller of the circular knitting machine through 485 communication. The main controller processes the received tension data and sends control instructions to the electric cam component corresponding to the yarn, controlling the micro-motor to rotate. The rotation of the micro-motor drives the gear to rotate, and the rotation of the gear drives the rack to move up and down, thereby adjusting the up and down position of the cam. As the up and down position of the cam changes, the knitting needles that rely on the cam for knitting actions change the yarn feeding amount under the influence of the cam position adjustment, so that the tension data of the yarn is within the allowable data range during the adjustment of the fabric variety. During the adjustment process, the higher the position of the cam, the less yarn is used, and the denser the fabric. Conversely, the lower the position of the cam, the greater the amount of yarn used, and the looser the fabric. When the yarn feeding length reaches the requirement, the main controller controls the electric cam component to make fine adjustments. If the yarn is too tight, the cam is adjusted upward; if the yarn is too loose, the cam is adjusted downward to make the tension of the yarn meet the requirement of constant tension, and the adjustment of the fabric variety is completed, greatly shortening the time for manually adjusting the cam and yarn tension in the past.

[0055] The present invention shortens the cycle time from tension detection to the control of the yarn feeding amount by the cams of the knitting machine, further reducing the product switching time of the production line, and avoiding the cumbersome work and time consumption caused by manually adjusting the cams when changing the variety of the produced fabric.

[0056] Although the present invention is specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present invention in terms of form and details without departing from the spirit and scope of the present invention defined by the appended claims, and all of them fall within the protection scope of the present invention.

Claims

1. Tension detection yarn feeder, characterized in that, It includes a support. A rotating shaft is vertically arranged on the support. A fixed wheel is installed at the top of the rotating shaft on the support, and a yarn feeding wheel is installed below the rotating shaft on the support. An inlet yarn support is installed on the left side of the support. An inlet yarn porcelain eye 1 and an inlet yarn porcelain eye 2 are respectively installed at the top and bottom of the inlet yarn support. A scraping blade is installed in the middle of the inlet yarn support. An elastic wire clamp is arranged below the scraping blade. A housing is arranged at the bottom right of the support. A tension sensor is arranged inside the housing. An outlet yarn support is arranged on the left side of the tension sensor. An outlet yarn porcelain eye 1 is fixed on the outlet yarn support. An outlet yarn porcelain eye 2 is arranged on the right side of the tension sensor. A tension detection circuit board is arranged in the housing. Among them, the tension sensor is installed in an inclined manner, and its strain gauge is located on the side close to the outlet yarn porcelain eye 1, and the free end of the strain gauge is at the bottom. A ceramic part is fixed on the top of the free end of the strain gauge, and the top surface of the ceramic part is arranged in an arc structure. The tension detection circuit board includes a central control unit, a tension interface circuit, a power supply unit, a display screen circuit board and a communication module. The tension interface circuit, the display screen circuit board and the communication module are connected to the central control unit. The tension interface circuit is used to connect the tension sensor to collect the tension data of the yarn. The display screen circuit board is used to display the working data of the tension detection yarn feeder and perform function operations on the device. The power supply unit supplies power to the tension detection yarn feeder. It also includes an electric triangular component. The electric triangular component includes a triangular mounting seat. An installation groove is opened on the front side of the triangular mounting seat. Slide grooves are respectively arranged on both sides of the installation groove. A slider is arranged in the installation groove. Slide bars are respectively convexly arranged on both sides of the slider and are slidably connected to the slide grooves in a matching manner. A micro motor is fixed on the rear side of the triangular mounting seat. The output shaft of the micro motor penetrates into the installation groove, and a gear is fixed at its end. A rack is fixed on the rear side of the slider. The gear is meshed with the rack. A plurality of triangles are fixed on the front side of the slider from top to bottom by bolts.

2. The yarn feeding device for tension detection according to claim 1, wherein The strain gauge is made of a high-elastic steel sheet.

3. The yarn feeding device for tension detection according to claim 1, wherein The central control unit is respectively connected with a DI processing unit and a DO processing unit. The DI processing unit and the DO processing unit respectively reserve DI interfaces and DO interfaces, and can realize signal input and alarm output.

4. The yarn feeding device for tension detection according to claim 1, characterized in that The display screen circuit board includes a liquid crystal display screen interface circuit, a display module and a key control circuit. The liquid crystal display screen interface circuit is respectively connected with the display module and the key control circuit. The display module is used to provide an operation interface and display the working data of the tension detection yarn feeder. The key control circuit is used to perform operations on the functions of the device.

5. A yarn feeding control system with tension feedback, characterized in that, It includes a plurality of tension detection yarn feeders as described in any one of claims 1-4. The plurality of tension detection yarn feeders are respectively connected to the main controller through a 485 bus communication method or a CAN bus method. The main controller is connected with a plurality of electric triangular components.

6. A yarn feeding control system with tension feedback according to claim 5, characterized in that, The main controller is connected with 4 CAN buses or 485 buses, and each CAN bus or 485 bus is respectively connected with N tension detection yarn feeders.

7. A yarn feeding control system with tension feedback according to claim 6, characterized in that, The maximum value of N is 32.

Images