768 results about "Yarn tension" patented technology

The invention relates to the technical field of yarn force detection, in particular to glass fiber yarn tension detection equipment and method, and solves the problem that the detection result is low in accuracy due to the fact that glass fiber yarn tension detection only has an accurate measurement result on static tension, the equipment comprises a non-contact vibration measurement module and a dynamic compensation mechanism, a data acquisition and transmission device and a control processing system; the method comprises the steps that S100, vibration signals are extracted, and yarn transverse vibration displacement is measured; s200, establishing a correlation model of the tension T and the inherent frequency fn; s300, dynamic error compensation: introducing an additional tension error compensation item T caused in the movement of the guide wheel and the yarn, and compensating a tension error caused by a movement factor; and S400, tension calculation: calculating a yarn tension value by integrating the static tension and the dynamic error compensation amount. The device is used for detecting and measuring the tension of yarn guiding and winding in the production process of glass fiber yarn, dynamic compensation is achieved, and the result accuracy is higher.

This utility model discloses a yarn tension adjusting device for textile machinery, including a support plate. A first motor is fixedly connected to the upper surface of the support plate, and a lead screw is fixedly connected to the output end of the first motor. A slider is threadedly connected to the outer surface of the lead screw, and a connecting plate is fixedly connected to the front surface of the slider. A lifting block is fixedly connected to the lower surface of the connecting plate. The first and second limiting plates can block the yarn, preventing it from tangling during transport to the textile machinery and thus avoiding interference with yarn processing. The second motor, first guide post, and second guide post structure ensure that when the yarn comes into contact with the first and second guide posts, activating the second motor causes the first and second guide posts to rotate at a uniform speed, making the yarn more stable during transport to the textile machinery.

The invention relates to the technical field of sizing machines, and discloses a tension detection and control method for a sizing machine, and the method comprises the steps: obtaining the distance between length measurement rollers, a yarn process parameter and a yarn transmission path; performing tension calculation according to the distance between the length measuring rollers and the yarn process parameters to obtain yarn tension; associating the yarn tension with the yarn transmission path to obtain a tension node diagram; according to the tension node graph and a preset tension threshold value, carrying out anomaly judgment to obtain an abnormal node; performing ant colony tracing according to the abnormal node and the tension node graph to obtain an abnormal starting node; and marking corresponding yarns according to the abnormal starting node, and pulling out the connected warp beam. The method has the advantages that the abnormal yarn area can be accurately detected, and the tension detection accuracy of the sizing machine is improved.

The present invention relates to the technical field of yarn tension detection, and specifically to a yarn tensile strength detection device and detection process, comprising an equipment main body, a pay-off shaft is installed on the equipment main body, a top box is fixedly connected to the outer wall of the equipment main body, a bottom box is connected to the bottom of the top box, a middle hole is opened at the bottom of the top box, the middle hole is connected to the interior of the bottom box, an inner slide rail is opened inside the equipment main body, a driving motor is fixedly connected to the inner side wall of the inner slide rail, a threaded rod is arranged at the output end of the driving motor, a cross plate is threadedly sleeved on the outer wall of the threaded rod, and through the arrangement of the top box and the bottom box, when in use, the top box and the bottom box can repeatedly cut and install the same roll of yarn, so as to perform tension detection on the whole roll of yarn, which is more efficient and convenient than the traditional manual cutting and installing method, and improves the detection efficiency.

The invention relates to the technical field of yarn speed regulation control, in particular to a sisal hemp carpet loom yarn feeding speed regulation control system which comprises a temperature and pressure coordinated regulation module, a real-time monitoring module, a differential geometric analysis module and an environment response regulation module. According to the method, the responsiveness and accuracy of the weaving process are greatly improved by comprehensively applying real-time adjustment of temperature and pressure and dynamic yarn feeding speed adjustment and control, the weaving requirement can be accurately matched by adjusting the physical state of the yarn in real time, yarn supply continuity and stability are ensured, and the yarn quality is improved. Yarn breakage and yarn loss caused by mismatching are remarkably reduced, yarn tension adjustment is more targeted and scientific through differential geometric analysis, the quality and structural uniformity of the sisal hemp carpet are optimized, high-quality production is allowed to be maintained in a variable production environment through an intelligent response function to environmental factors, dependence on operators is reduced, and the production efficiency is improved. And the production automation and the efficiency are promoted to be improved.

The invention discloses monofilament prepreg yarn dry-method winding equipment and a tension control method, and relates to the technical field of composite material forming, the monofilament prepreg yarn dry-method winding equipment comprises an unwinding yarn box, a yarn roll is connected with a driving motor and used for outputting yarn, the yarn is wound on a hook leg buffer mechanism after being led out of the yarn roll, and the hook leg buffer mechanism is used for adjusting the tension of the yarn; a main shaft is rotatably arranged on the gantry frame in the length direction, and a mold is arranged on the main shaft; the moving trolley is in sliding connection with the gantry frame in the length direction of the gantry frame, the moving trolley is provided with a yarn winding nozzle, the yarn winding nozzle corresponds to the mold, and the yarn enters the yarn winding nozzle after being led out of the hook leg buffering mechanism and is wound on the mold. According to the invention, high-speed automatic winding of monofilament prepreg yarns can be realized, the automation degree is high, and the production efficiency is improved. The yarn tension output by each yarn roll is independently adjusted based on the tension after stranding, the control precision of the yarn tension is improved, the tension is kept stable, and therefore the yarn winding quality is improved.

The invention discloses a spinning production process optimization method based on an intelligent terminal, and relates to the technical field of spinning production. According to the spinning production process optimization method based on the intelligent terminal, a sensor is integrated through the intelligent terminal, process parameters and yarn surface image data are obtained in real time and input into a spinning production process monitoring model, the matching degree of the process parameters and the yarn surface state is analyzed, and a process adaptation index is obtained. According to the process adaptation index, the yarn tension and the spinning speed are dynamically adjusted through a fuzzy control algorithm, and therefore the production process is optimized. Whether the textile equipment is abnormal or not is judged through the equipment position information and the process adaptation index, the inspection path is optimized through the A star algorithm, and it is ensured that the equipment is inspected and maintained in time. Intelligent monitoring and optimization adjustment in the spinning production process are achieved, the production efficiency, the yarn quality and the equipment operation stability are improved, and manual intervention and fault risks are reduced.

The invention relates to the technical field of heald frame self-adaptive control, and discloses a spinning heald frame self-adaptive control system and method.The spinning heald frame self-adaptive control system comprises a sensor set used for collecting heald frame displacement, yarn tension and fabric surface state data in real time and generating heald frame state data, and the input end of a defect detection module is connected with the sensor set; receiving the checked yarn tension and fabric surface state data, performing defect detection on the fabric surface state data, generating a suppression signal for abrupt change of heald frame acceleration according to correlation analysis of a fabric state rating signal and real-time displacement, dynamically deciding and receiving a defect identification result, querying a defect type mapping table, and determining whether the defect type mapping table is abnormal or not. According to the method, a control parameter forced priority sequence is determined, weft errors and tension changes on the surface of the fabric are judged, self-adaptive adjustment of the spinning heald frame through weaving state detection is achieved, and weaving accuracy is improved.

The invention relates to the field of textile control, in particular to a tension control method and system of a high-speed loom. The method comprises the following steps: firstly, obtaining the tension fluctuation degree of each moment according to the tension data difference of the loom at each moment and the tension data distribution of each moment in a preset time domain of each moment, clustering all moments to obtain a first cluster, and obtaining the tension fluctuation degree of each moment according to the tension data distribution of each moment in each first cluster; the method comprises the steps of obtaining a change state value of each first clustering cluster according to the tension fluctuation degree of each first clustering cluster and the difference of the tension fluctuation degree of each first clustering cluster at each moment, further clustering all the first clustering clusters to obtain second clustering clusters, and obtaining the tension change degree of the loom according to the position distribution of each first clustering cluster in each second clustering cluster. And performing PID control on the loom according to the deviation condition of the tension data of the loom at the current moment and the tension change degree. The control effect on the yarn tension of the high-speed loom can be improved.

The invention discloses a yarn tension balancing device of a weaving machine, which belongs to the technical field of weaving machine yarns and comprises a weaving machine body, and two sides of the weaving machine body are rotatably connected with a yarn winding roller and a yarn scaling roller respectively; according to the yarn tension balancing device of the weaving machine, the yarn winding roller is driven to rotate, the air conveying assembly is driven to rotate as a whole and is matched with the driving part, so that air in the air cylinder enters the spiral strip-shaped air bag in a reciprocating mode through the air conveying pipe, and the spiral strip-shaped air bag on the rotating yarn winding roller slowly expands outwards; the outer elastic sleeve is expanded and enlarged, yarns on the yarn winding roller are expanded outwards, gaps between the yarns are reduced, winding and winding are tighter, when the yarns are wound tightly, the size of a yarn roll can be obviously reduced, the rental area of a warehouse can be reduced, the storage cost can be reduced, the layout of the warehouse can be more reasonable, and the service life of the warehouse can be prolonged. Stock management is facilitated, deformation of the yarn roll can be prevented, and the overall strength and stability of the yarn roll are enhanced.

The invention relates to the technical field of spinning quality detection, and discloses a jute spinning product quality detection method and system based on an intelligent sensor. The method comprises the following steps: acquiring real-time process parameters of a jute spinning production line, and synchronously capturing yarn surface temperature field distribution in combination with an infrared thermal imager; performing space-time alignment processing on the yarn tension fluctuation data and the temperature field distribution to generate a fused dynamic process characteristic matrix; according to the tension gradient change rate and the temperature field abnormal region coordinates in the dynamic process characteristic matrix, dividing potential occurrence sections of yarn quality defects; a microstructure image of the yarn in the potential generation section is extracted, a fiber arrangement angle deviation value is measured through a polarized light interferometer, and fiber molecular bond vibration frequency data is obtained in combination with a Raman spectrometer; and inputting the fiber arrangement angle deviation value and the molecular bond vibration frequency data into a cascade quality analysis model, and outputting a quantitative index set of the internal structure defects of the yarns.

The invention relates to the field of yarn quality prediction, in particular to a high-strength yarn quality prediction method, which comprises the following steps of: acquiring an image when silk threads are twisted, obtaining a contour line of each silk thread, and connecting two points on the contour lines of the silk threads to form a datum line; taking the ratio of the product of the transverse deviation value and the longitudinal deviation value to a pre-obtained quality value as a first evaluation value; constructing segmentation lines on the image, wherein the segmentation lines intersect with the reference line to form a plurality of reference lines; obtaining a second evaluation value based on the difference between the reference line in the real-time image and the reference line in the historical moment image, and obtaining a third evaluation value based on the ratio of the reference line length in the real-time image; and inputting the first evaluation value, the second evaluation value, the third evaluation value, the drawing speed collected in real time and the silk yarn tension value collected in real time into a trained sequential network model, and predicting the yarn quality. According to the method, the yarn quality is comprehensively analyzed and predicted through multiple factors, and the yarn quality prediction accuracy is improved.

The utility model relates to the technical field of textile yarns, in particular to a textile yarn tension adjustment device, comprising an operating table, a pressure plate is provided at the upper end of the first connecting rod, a positioning tip is provided at the upper end of the second connecting rod, the gear matches the positioning tip, a vortex spring is provided on the surface of the gear close to the second roller, one end of the two vortex springs away from the gear is connected to the second roller, a plurality of fixing rods are provided on the surface of the second roller, and a plurality of V-shaped notches are provided on the upper ends of the fixing rods. The utility model first pulls the yarn under the pressure plate, then presses the yarn onto the first roller on the left, then passes the yarn under the first roller on the right, and finally presses the yarn into the V-shaped notch set on the fixing rod, then selects the rotating gear, and engages the second connecting rod with the gear. Under the action of the second spring, the gear is firmly clamped; there is no threading work, which reduces the operation time.

The invention relates to the technical field of spinning yarn untwisting speed regulation, and particularly discloses an untwisting speed regulation method for vortex spinning yarn twist test, which comprises the following steps: additionally arranging a current sampling module in a motor background system of an untwisting motor, and monitoring the working current of the untwisting motor at the current moment in the spinning yarn untwisting process in real time; determining a first predicted tension of the spinning yarn of the target specification at the current moment; the method comprises the following steps of: monitoring swinging parameters of a free swinging yarn guide hook in each swinging period in real time through the free swinging yarn guide hook mounted on a spinning yarn untwisting path; comprehensively calculating a second predicted tension of the spinning yarn of the target specification at the current moment; and finally, the predicted tension of the target specification spinning yarn at the current moment is comprehensively determined, the untwisting speed of the target specification spinning yarn at the current moment is correspondingly adjusted based on the predicted tension, and by monitoring and adjusting the yarn tension in real time, the product quality and the production efficiency can be improved, the service life of equipment can be prolonged, and the cost can be reduced.

The utility model relates to the technical field of yarn tension adjustment, in particular to a yarn tension adjusting device which comprises an adjusting mechanism, a fixing mechanism and a rotating mechanism, the fixing mechanism is fixedly arranged on one side of the adjusting mechanism, and the rotating mechanism is fixedly arranged on the fixing mechanism. The adjusting mechanism comprises a fixing plate, a nesting ring, a threaded groove, a threaded rod, a bearing, a connecting opening, a rotating disc, a fixing opening and a crank, and the nesting ring is fixedly arranged on one side of the fixing plate. When the yarn tension adjusting device is used, firstly, yarn sequentially penetrates through rotating grooves in a rotating wheel, a rotating disc rotates by rotating a crank, so that a threaded rod rotates, the length of the threaded rod in a fixed plate can be adjusted through rotation of the threaded rod, and therefore a movable plate moves; the yarn tension adjusting device has the advantages that the yarn tension adjusting device is simple in structure, small in size, convenient to carry and flexible and convenient to adjust.

The invention relates to the field of warp knitting machines, in particular to a weft selecting trolley with a yarn tension adjusting function, which comprises a weft selecting trolley unit and can monitor the tension state of yarns in real time by arranging a capacitive proximity switch: when the yarns are loose, the capacitive proximity switch does not send out a signal, a system automatically triggers a tension adjusting mechanism, and the tension state of the yarns is adjusted; the assembly mounting plate is pulled through the driving mechanism to ensure that the yarn is always in a tensioned state, the yarn loosening phenomenon in the weft laying process is effectively avoided, the tensioning of the yarn can be automatically adjusted, all the yarn clamping units can be controlled through the adjusting unit to clamp the yarn, and the yarn laying efficiency is improved. Synchronous work of yarn clamping of the clamping assemblies and the capacitive proximity switch is achieved through the adjusting piece, single adjustment of the single assembly mounting plate in the yarn clamping state can be achieved through cooperation of the adjusting piece and the guide frame, the synchronous adjusting plate drives the clamping assemblies on the two sides to synchronously move through the limiting sliding grooves, and it is guaranteed that clamping force is evenly distributed; yarn deviation or distortion is avoided, and weft laying quality is improved.

The invention belongs to the technical field of textile, and discloses a reinforcement learning and physical modeling combined broken end dynamic capturing method and system. The method comprises the following steps: constructing a yarn microstructure evolution model; inputting real-time environment parameters of the textile workshop into the microstructure evolution model, and predicting to obtain real-time microstructure parameters of the yarn; performing nonlinear coupling feature extraction on the real-time environment parameters, and calculating an environment coupling feature vector; inputting the real-time microstructure parameters as material attributes into a yarn tension dynamical equation, and solving to obtain a predicted yarn macroscopic stress state; splicing the macroscopic stress state of the yarn and the environment coupling feature vector to form a state observation value; the reinforcement learning agent outputs a broken end risk probability value according to the state observation value; and when the broken end risk probability value exceeds a preset threshold value, generating and outputting a broken end early warning signal. According to the invention, early and accurate early warning of yarn breakage in a complex dynamic environment can be realized.

The invention relates to the technical field of carbon fiber prepreg cloth production, and discloses a low-gram-weight yarn spreading device for carbon fiber prepreg cloth, which comprises a rack, and a modular yarn releasing unit, a hot roller yarn spreading unit and an airflow auxiliary yarn spreading unit which are arranged on the rack, the hot roller yarn spreading unit comprises at least three hot roller groups, the airflow auxiliary yarn spreading unit comprises an airflow nozzle assembly and an airflow buffer plate which are oppositely distributed up and down, the airflow nozzle assembly sprays airflow and is used for transversely pushing away fibers to assist yarn spreading, and the airflow buffer plate releases the airflow to form an air cushion to buffer yarn tension fluctuation. According to the low-gram-weight yarn spreading device for the carbon fiber prepreg cloth, the hot roller yarn spreading unit and the airflow auxiliary yarn spreading unit cooperate, efficient yarn spreading is achieved, meanwhile, the airflow buffer plate releases low-pressure airflow, an air cushion is formed, tension fluctuation is absorbed, and the yarn breaking rate is reduced.

The utility model relates to the technical field of tension regulators, in particular to a traditional spinning yarn tension regulator, which is characterized in that a yarn main body is pulled by a traction device to slide along a quartz wheel and three yarn wheels in sequence, and in the process, the quartz wheel and the three yarn wheels apply pressure to the yarn main body from different angles; when the yarn inlet end is clamped, the yarn body in the adjusting device can be tensioned, the tensioned yarn body can apply pressure to the yarn wheel, the yarn wheel can apply pressure to the spring through the sliding block, the spring is shrunk, the tensile force borne by the yarn body is converted into the elastic force of the spring, and the yarn body is tensioned. Meanwhile, the bent yarn main body can be straightened, more yarn main bodies are released, the length pulled by the traction device is supplemented, the tensile force borne by the yarn main body is shared through the yarn wheel capable of sliding, and the effect that the yarn main body is prevented from being snapped by the traction device due to the fact that the yarn inlet end is clamped is achieved.

The invention discloses a warp rebeaming machine unwinding device with a tension adjusting device and a using method thereof.The warp rebeaming machine unwinding device comprises a creel, a warp fixing frame is fixedly installed on the creel, a warp beam is rotatably installed on the warp fixing frame, a yarn guide arrangement plate is fixedly installed on the creel, a winding shaft is rotatably installed on the creel, and a tension adjusting device is installed on the winding shaft. A tension balancing mechanism located between the yarn guide row plate and the winding shaft is installed on the creel, a winding motor is fixedly installed on the creel, and an output shaft of the winding motor is fixedly connected with the winding shaft. According to the warp yarn rebeaming device, when the tension of the inlet yarn changes due to factors such as environment or warp yarn, the supporting capacity of the dynamic tension wheel is adjusted in real time, the tension of the warp yarn is kept constant, and the problem that the tension of the yarn is unstable, so that the tension of the warp yarn is not uniform after rebeaming is solved; the reaction to tension change is more sensitive and reliable, and the winding quality after warp rebeaming is balanced and stable.

The present invention relates to the technical field of winding of a winding machine, and in particular to a control system based on the distribution of the initial and final speeds of the winding machine, comprising an input unit; a control unit, coupled to the input unit, for calculating a stepped curve with increasing speed; an execution unit, coupled to the control unit, for gradually increasing the linear speed of the winding machine according to the calculated stepped curve, wherein the control unit further comprises a dynamic optimization module, which adjusts the formula in real time according to the yarn tension and winding characteristics to achieve the most optimized winding speed distribution; through the precise distribution and adaptive adjustment of the initial and final speeds of the winding machine, the accuracy and adaptive ability of speed control are improved, the occurrence of the problem of white spot color difference in the inner layer is effectively avoided, and at the same time, fault prediction and diagnosis capabilities are provided, the production efficiency and product quality are improved, and significant technical advantages and economic benefits are achieved.

The invention discloses textile winding equipment with a tension detection function, and relates to the technical field of tension detection, the textile winding equipment comprises a double-station winding machine, the double-station winding machine comprises a base and a rotating frame, an electric control part is arranged above the base, two winding shafts are rotatably arranged on one side of the rotating frame and are horizontal to each other, the outer walls of the winding shafts are sleeved with yarn bobbins, and the yarn bobbins are arranged on the rotating frame. The rotating frame is controlled by the electric control part to rotate so that the positions of the two winding shafts can be switched, and a tension detection mechanism is arranged at the yarn inlet end of the double-station winding machine and used for monitoring yarn tension in real time. The problems that in the prior art, when yarn is wound, a tension wheel generally only has the tension adjusting function, the tension cannot be monitored in real time, then adjustment cannot be conducted in time when the tension is abnormal, and yarn breakage is caused are solved. The yarn winding device has the advantages that the tension is monitored in real time through the tension detection mechanism in the yarn winding work, and when the tension is abnormal, processing can be conducted in time.

The utility model relates to a yarn surface sizing device and relates to the technical field of yarn sizing, in order to solve the problem that yarn transmission is prone to being too loose or too tight, the yarn surface sizing device comprises a rack, and a pay-off mechanism, a transmission mechanism, a sizing mechanism, a mud jacking mechanism and a drying mechanism are arranged on the rack; the pay-off mechanism comprises a pay-off roller, two tensioning air cylinders and two bearing plates, the pay-off roller is rotationally arranged between the two bearing plates, the two bearing plates are arranged on the rack, the two tensioning air cylinders correspond to the two bearing plates respectively, cylinder bodies of the tensioning air cylinders are hinged to the rack, the output ends of the tensioning air cylinders are hinged to the bearing plates, and the output ends of the tensioning air cylinders are hinged to the bearing plates. The ends, away from the tensioning air cylinders, of the bearing plates are hinged to the rack, and one bearing plate is provided with a driving piece used for driving the pay-off roller to rotate. The yarn tension adjusting device has the effects of accurately adjusting the yarn tension in real time and improving the product quality and consistency.

The utility model discloses a warp knitting machine yarn path tension control device which is installed on a yarn feeding path between a warp beam and a looping area and comprises a support, a first yarn guide rod, a first swing rod and a tension detection mechanism used for detecting yarn tension. The first yarn guide rod is in transmission connection with a servo motor, a plurality of first elastic connecting pieces are installed on the first yarn guide rod at intervals in the axial direction of the first yarn guide rod, the other ends of the first elastic connecting pieces are connected with the first swing rod, and the axial direction of the first swing rod is the same as the axial direction of the first yarn guide rod. Yarn sequentially bypasses the first swing rod and the first yarn guide rod to enter the looping area, the tension detection mechanism is located on a yarn feeding path between the first yarn guide rod and the looping area, and the tension detection mechanism and the servo motor are in communication connection with a controller. The structure is simple, yarn active compensation is achieved, and yarn tension is balanced.

The invention relates to the technical field of spinning. The invention relates to a yarn twist control method and device, computer equipment and a storage medium, and the method comprises the steps: obtaining yarn type information, setting target twist information according to the yarn type information, setting a forward twist value and a reverse twist value according to the target twist information, monitoring the tension change of the yarn in the twist change process in real time, and controlling the twist of the yarn according to the tension change. Yarn tension information is obtained, the yarn tension information, the forward twist value and the reverse twist value are input into the trained twist and tension relation model, an output result of the twist and tension relation model is obtained, and twist parameters of the yarn are dynamically adjusted according to the output result of the twist and tension relation model. The device has the effect of improving the yarn quality and the production efficiency.

The invention discloses a yarn conveying method, device and system, a storage medium and a dyeing and embroidering system. The yarn conveying method comprises the steps that the real-time yarn feeding length and the set yarn feeding length of the current needle sequence are obtained; determining a yarn feeding deviation value based on the real-time yarn feeding length and the set yarn feeding length; using the yarn feeding deviation value to determine the candidate yarn feeding length of the next needle sequence adjacent to the current needle sequence; the current tension of the yarn is obtained, and the candidate yarn feeding length is adjusted based on the current tension so as to obtain the target yarn feeding length for the rear needle sequence. According to the yarn feeding method and device, the deviation is made between the real-time yarn conveying amount and the set amount, the yarn feeding amount is dynamically adjusted on the basis of the deviation and the current yarn tension, feedback data of the dyeing equipment and feedback data of the weaving and embroidering equipment can be linked, and accurate yarn feeding is achieved.

The utility model discloses a weft yarn tension control device of a weft knitting machine, which comprises a support frame, two ends of the support frame are rotatably connected with guide wheels, an open groove is arranged inside the support frame, a movable block slides inside the open groove, the inside of the movable block is rotatably connected with an adjusting wheel, and the adjusting wheel is connected with the guide wheels. A connecting frame is fixedly connected to the lower end of the supporting frame, an air cylinder is arranged in the connecting frame, the height of an adjusting wheel can be adjusted by arranging the air cylinder, a connecting block and a movable block, and therefore the yarn tension of the whole device can be adjusted; the damping and buffering assembly is arranged at the lower end of the movable block, damping is conducted on the adjusting wheel, meanwhile, the adjusting wheel has certain elasticity, the phenomenon of weft breaking caused by too tight yarn traction of the adjusting wheel can be effectively avoided, the device is simple in structure and convenient to operate, too tight yarn traction or weft breaking is avoided, and the service life of the adjusting wheel is prolonged. And the weaving quality can be guaranteed.

The invention relates to the field of yarn tension detection, in particular to a single-strand yarn tension detection mechanism of a warp knitting fabric for automobile seat base cloth, which measures the tension of the single-strand yarn of the warp knitting fabric for the automobile seat base cloth through the cooperation of a tension detection unit and a yarn pressing frame, so that the accuracy of a measurement result can be ensured; the yarn clamping mechanism is matched with driving of a second synchronous plate, so that when the yarn pressing frame moves, the yarn clamping mechanism can synchronously move, the yarn is fixed and divided into two sections to be measured, the adjusting mechanisms on the two sides are matched with the yarn sensing mechanism, it is guaranteed that the yarn can be measured when the yarn is tightened, and the situation that the measurement result is affected due to the fact that the yarn is not tightened can be prevented; in this way, two tension values can be measured at a time, and after yarn measurement results of different sections are integrated, the accurate single-strand yarn tension value of the warp knitting fabric for the automobile seat bottom cloth can be obtained.

The invention provides a constant tension control automatic yarn take-up and pay-off yarn carrier and a control method thereof, and belongs to the technical field of three-dimensional weaving, the constant tension control automatic yarn take-up and pay-off yarn carrier comprises a spring thread guide mechanism, a yarn guide rod and a yarn bobbin, the spring thread guide mechanism, the yarn guide rod and the yarn bobbin are all fixedly installed on a base, the yarn bobbin is driven by a motor, and the motor is connected with a battery and a single-chip microcomputer. When the yarn tension adjusting device works, the real-time tension value of the yarn is compared with the set tension value, then the corresponding actual output value is calculated through the PID algorithm, and the motor is driven to rotate so as to drive the yarn cylinder to rotate to collect and release the yarn, so that the yarn tension is adjusted. The device is simple in structure, external power supply is not needed during working, the influence of a yarn path on the yarn quality in the yarn winding and unwinding process is small, the tension can be rapidly and accurately adjusted, the tension is kept at a set value, extremely high universality is achieved, the knitting efficiency and the quality of knitted fabric can be improved, and development of the three-dimensional knitting technology and expansion of the application range are promoted.

The invention discloses a yarn tension detection mechanism, and relates to the technical field of yarn tension detection, the yarn tension detection mechanism comprises a detection table, and also comprises a single multi-section tension detection mechanism installed at the top of the detection table; according to the invention, the center tightening mechanism is installed to make the yarn in a tensioning state before segmentation, the tensioning degree and length of multiple segments of yarns are kept consistent, the consistency of detection results is guaranteed, the multiple segments of isolation clamping mechanisms are installed to divide a single yarn into multiple segments of detection segments, the multiple segments of yarns are isolated, mutual influence of the multiple segments of yarns is avoided, and the detection efficiency is improved. The method comprises the following steps of: arranging a yarn humidifying mechanism, monitoring tension data of the yarn in real time, selectively humidifying the yarn by adding a specified amount by installing the yarn humidifying mechanism, and testing the tension of the yarn by utilizing a single multi-section tension detection mechanism after humidifying, so as to obtain the tension data of the yarn with different humidity and obtain the performance of the yarn in different environments; and evaluating the yarns according to the performance data.