CN111999246A - Method and device for detecting density of fiber strands of pre-spinning equipment or fiber strand detection equipment - Google Patents
Method and device for detecting density of fiber strands of pre-spinning equipment or fiber strand detection equipment Download PDFInfo
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- CN111999246A CN111999246A CN202010961188.1A CN202010961188A CN111999246A CN 111999246 A CN111999246 A CN 111999246A CN 202010961188 A CN202010961188 A CN 202010961188A CN 111999246 A CN111999246 A CN 111999246A
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Abstract
The invention discloses a method and a device for detecting the density of a fiber strand of fore-spinning equipment or fiber strand detection equipment, wherein the fore-spinning equipment or the fiber strand detection equipment comprises a cotton guide, the fiber strand density detection device comprises a detection piece and a force sensor, the detection piece comprises a detection rod or a detection plate, one end of the detection piece is a detection end, the detection end of the detection piece is arranged in the cotton guide, a pin shaft is arranged on the fore-spinning equipment or the fiber strand detection equipment, the other end of the detection piece or a detection piece body is arranged on the pin shaft, the force sensor is abutted against or connected with the detection piece, and the force sensor is arranged on the fore-spinning equipment or the fiber strand detection equipment. The pin shaft is used as a fulcrum of the detection piece, and the distance from the fulcrum to the detection end is greater than the distance from the fulcrum to the position where the force sensor abuts against or is connected with the detection piece. The invention can accurately detect the density of the fiber strand, can also accurately detect the slight density change of the fiber strand, has simple structure, good repeatability and high reliability, and can realize the detection of the density of the fiber strand with different thicknesses.
Description
Technical Field
The invention relates to a sliver density detection method and device of fore-spinning equipment or sliver detection equipment, in particular to a sliver density detection method and device of fore-spinning equipment such as a carding machine, a combing machine and various drawing frames and sliver detection equipment, belonging to the technical field of textile equipment and technology.
Background
With the rapid development of textile technology, the requirements for the quality of textiles are increasing day by day. Cotton carding and drawing are important spinning processes and play a decisive role in improving and improving spinning quality, so that the instantaneous density change of the slivers needs to be monitored and adjusted at any time in the sliver production process to ensure the evenness of the slivers.
The present beard and strip density detection device, for example, chinese utility model patent, a structure that patent number is ZL201120221031.1 discloses, it includes silver input end, displacement sensor, the displacement sensor mount pad, spring and detection lever, it has the U-shaped groove to open on the silver input end, the detection lever sets up at the U-shaped inslot, the pole body and the silver input end of detection lever rotate the hookup, lower end is located the silver play oral cavity of silver input end, the top of upper end is on the spring, the spring other end pushes up on the spring holder of silver input end, displacement sensor's displacement measuring needle pushes up on the pole body of detection lever. When the cotton sliver detector works, when the density of the cotton sliver changes, the lower end head of the detection lever swings up and down around the rotating shaft under the combined action of the cotton sliver and the spring, so that the rod body of the detection lever is driven to move up and down, and a displacement measuring needle on the displacement sensor is triggered to generate a detection signal to be output. The device has the following disadvantages in the practical working process:
(1) the momentum is the product mv of the mass m of the particles and the speed v of the mass m, the momentum of the moving cotton sliver is the vector sum of the momentum of the particles in the cotton sliver, the moving cotton sliver is abutted against the lower end head of the detection lever, the cotton sliver with uneven thickness transmits a certain amount of momentum to the detection lever, the detection lever obtains the momentum to swing around the rotating shaft, and therefore, the swing amplitude of the detection lever is not only related to the thickness of the cotton sliver, but also related to the running speed of the cotton sliver, and the accuracy of the thickness detection data of the cotton sliver is greatly reduced;
(2) when the device works, the spring applies acting force to the detection lever, the cotton sliver has bulkiness, the lower end of the detection lever can swing around the rotating shaft, the spring changes the size of a channel when the cotton sliver leaves the cotton sliver input end through the detection lever, the thick cotton sliver provides a large channel, and conversely, the spring provides a small channel, namely, in the whole detection process, the volume of the cotton sliver, the density of the cotton sliver and the volume of the channel of the cotton sliver are dynamically changed, and the cotton sliver or the thickness is detected in unequal states, so that the accuracy of the thickness detection data of the cotton sliver is greatly reduced;
(3) when the device works, the spring acts on the detection lever, and the lower end head of the detection lever swings around the rotating shaft. The spring is an energy storage element, and the lower end head of the detection lever swings around the rotating shaft to generate friction damping. When the thickness, namely the density, of the cotton sliver is changed, the rigidity of the spring, the self inertia force of the spring and the friction damping enable the displacement sensor not to timely and rapidly reflect the change of the density of the cotton sliver, so that the serious hysteresis effect is achieved, and a certain transition process is shown in a time domain. At present, the drawing speed of a drawing frame reaches 600-1200 m/min, uneven weight detection of short sections (such as 0.25 m) of cotton slivers cannot be carried out in time, and the device is limited in application range;
(4) the lower end head of a detection lever of the device swings up and down around a rotating shaft, abnormal external excitation force is generated, a spring easily generates forced simple harmonic vibration which is background noise of a displacement sensor and seriously interferes the detection of the displacement sensor, thick and thin cotton slivers are easily generated, the cloth cover quality and the yarn evenness are affected, and mechanical waves are caused;
(5) the lower end head of a detection lever of the device swings up and down around a rotating shaft, friction damping can be generated between the detection lever and the rotating shaft, the damping is nonlinear, the magnitude of damping torque is related to the deformation of a spring and the moving speed of a cotton sliver, moreover, the swinging structure greatly weakens the rigid rigidity of the whole device, the speed of the cotton sliver discharging is about 700 m/min in a frequency domain, the thickness detection data of the cotton sliver can be trusted, and when the speed of the cotton sliver discharging is more than 900 m/min, the deviation of the thickness detection data of the cotton sliver exceeds an allowable range;
(6) the device uses a displacement sensor, the requirements on the processing precision of a detection lever and a spring and the thermal expansion performance of materials are very high, in addition, the reaction force of the spring is associated with a plurality of variables, the produced spring has large discrete property, and the output quantity deviation of the thickness change of the cotton sliver of the corresponding cotton sliver density detection device is very large, so the detection repeatability is poor, the detection precision is large in discrete property, the calibration is difficult, in addition, the device can not detect the fine density change of the cotton sliver, and the detection precision is poor;
(7) when the device works, cotton fiber sundries are adsorbed on the spring and are not easy to process, the normal work of the detection spring is disturbed, the daily maintenance workload is large, and the device has more parts, complex structure, complex working procedures and difficult replacement;
(8) the device's the scalable probe end of displacement offsets with detecting the lever is protruding, and when the silver thickness changed, the protruding outline curve of detection lever did not exert the normal pressure of displacement direction to the scalable probe end of displacement sensor displacement, has superpose the component force that is unfavorable for its work for flexible damping can appear in the displacement sensor displacement probe end, influences the device and detects the precision, and can not ensure the long-term reliable operation of displacement sensor.
In summary, in the fiber strand density detection device and the corresponding detection method in the prior art, because the above disadvantages greatly affect the detection precision, repeatability, stability and the like of the density, it is difficult to accurately monitor the yarn evenness CV% and the weight unevenness rate, which directly affects the cotton sliver evenness effect and the resultant yarn quality.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a fiber strand density detection method of a pre-spinning device or a fiber strand detection device, which can accurately detect the fiber strand density and is simple and convenient to operate. Meanwhile, the invention also provides a whisker density detection device of the pre-spinning equipment or the whisker detection equipment, which can accurately detect the density of the whisker, avoid multi-parameter correlation of detection results in a detection mechanism, avoid the adoption of a discrete large and low-repeatability component on a detection piece, and has the advantages of reasonable and simple structure, good repeatability and high reliability.
In order to solve the technical problem, the invention adopts the method for detecting the density of the fiber strands of the fore-spinning equipment or the fiber strand detection equipment, which comprises the following steps
a. Arranging a detection piece and a force sensor, wherein the detection piece comprises a detection rod or a detection plate, one end of the detection piece is set as a detection end, the detection piece is provided with a fulcrum, and the detection end of the detection piece is arranged in a cotton guide of a front spinning device or a whisker strip detection device;
b. the fiber strand moving in the cotton guide acts on the detection end of the detection piece, the acting force of the fiber strand is transmitted to the force sensor through the detection piece, and the force sensor obtains a signal of fiber strand density change according to the acting force to detect the fiber strand density; in the process that the beard strip transmits acting force to the force sensor through the detection piece, the detection end of the detection piece bears the pressure of the beard strip in the cotton guide device, and the detection piece does not move.
In a preferred embodiment of the invention, the acting force of the density change of the fiber strand on the force sensor is amplified through the fulcrum arranged on the detection piece.
As a preferred embodiment of the invention, the method further comprises c, detecting the density of the fiber strands with different thicknesses by adjusting the position of the detection end of the detection piece in the cotton guide.
As a preferred embodiment of the present invention, a pin is provided on the fore-spinning device or the fiber strand detection device, and the pin is used as a fulcrum of the detection member.
In order to solve the technical problem, the invention adopts the fiber strand density detection device of the fore-spinning device or the fiber strand detection device, the fore-spinning device or the fiber strand detection device comprises a cotton guide, the fiber strand density detection device comprises a detection piece and a force sensor, the detection piece comprises a detection rod or a detection plate, one end of the detection piece is a detection end, the detection end of the detection piece is arranged in the cotton guide, a pin shaft is arranged on the fore-spinning device or the fiber strand detection device, the other end of the detection piece or a detection piece body is arranged on the pin shaft, the force sensor is abutted against or connected with the detection piece, and the force sensor is arranged on the fore-spinning device or the fiber strand detection device.
As a preferred embodiment of the present invention, the pin is used as a fulcrum of the detecting element, and a distance from the fulcrum to the detecting end is greater than a distance from the fulcrum to a position where the force sensor abuts against or is connected to the detecting element.
As a preferred embodiment of the present invention, the force-bearing axis of the force sensor coincides with a tangent line of an arc line at a position where the force sensor abuts against or is connected with the detection member, with the center line of the pin shaft as a circle center.
As a preferred embodiment of the present invention, the detection end of the detection member is provided with an arc surface.
As a preferred embodiment of the present invention, the strand density detecting apparatus further comprises a displacement mechanism, the displacement mechanism comprises a guide rail and a linear motion mechanism, the guide rail is mounted on the front spinning device or the strand detecting device, and the force sensor is driven by the linear motion mechanism to advance or retreat along the guide rail.
In a preferred embodiment of the present invention, the linear motion mechanism includes a motor and a screw-nut pair, the force sensor is connected to a nut of the screw-nut pair, and the nut is slidably connected to the guide rail.
After the technical scheme is adopted, the invention has the following beneficial effects:
in the process that the beard strips transmit acting force to the force sensor through the detection piece, the detection end of the detection piece bears the pressure of the beard strips in the cotton guide and the detection piece does not move, so that the detection device bears the pressure of the beard strips in the cotton guide through the detection end of the detection piece and the detection piece does not move, and a structure that the force sensor is abutted against or connected with the detection piece is adopted, so that the volume of a detection channel of the beard strips in the cotton guide is kept unchanged during detection, and the density of the beard strips can be accurately detected under the condition that the volume of the detection channel of the beard strips is unchanged.
According to the invention, the distance from the fulcrum to the detection end is larger than the distance from the fulcrum to the position where the force sensor abuts against or is connected with the detection piece through the fulcrum arranged on the detection piece, so that the acting force of the density change of the fiber strands on the force sensor can be amplified, the fine density change of the fiber strands can be caused, and the force sensor can sense and detect the density change of the fiber strands, thereby greatly improving the detection precision of the fiber strand density.
The invention adopts the structure that the stress axis of the force sensor coincides with the tangent of the arc line at the position where the force sensor abuts against or is connected with the detection piece by taking the central line of the pin shaft as the center of a circle, so that the acting force of the beard strip transmitted to the force sensor by the detection piece can be ensured to be positive pressure, the detection precision of the density of the beard strip is further improved, the detection result is more accurate, and meanwhile, the long-term reliable operation of the force sensor is ensured.
The invention can realize the detection of the density of the fiber strands with different thicknesses by adjusting the position of the detection end of the detection piece in the cotton guide. When the device works, the cotton guide does not need to be replaced according to the variety and the thickness of the fiber strands complexly, and the position of the force sensor which is abutted against or connected with the detection piece is adjusted electrically or manually by the displacement mechanism, so that the position of the detection end of the detection piece in the cotton guide is changed, and the specification of the thickness of the fiber strands applicable to each position is calibrated and stored, so that the front spinning equipment or the fiber strand detection equipment can replace different fiber strand varieties more conveniently and more quickly, the detection range of the fiber strands is expanded, the intelligent manufacturing is realized, and the production efficiency is improved.
The invention abandons the prior art that a spring is adopted as a detection piece, thereby avoiding the multi-parameter correlation of the detection result on the detection mechanism, and avoiding a part with large dispersion and low repeatability on the detection piece.
The fiber strand density detection device is a minimum inertia detection device, has good quick response, can quickly and efficiently detect uneven weight of short segments of fiber strands, and lays a good foundation for reducing broken ends, dyeing color difference and color formation on the surface of a fabric in the subsequent process.
The invention has the advantages of reasonable and simple structure, convenient installation, simple operation, convenient maintenance, good matching performance and easy replacement, greatly improves the accuracy and reliability of the strand detection, and has no special requirements on the processing and assembling precision of the detection device.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of a fiber strand density detecting device of a front spinning device or a fiber strand detecting device according to the present invention.
FIG. 2 is a schematic front view of a fiber strand density detecting device of the front spinning device or the fiber strand detecting device according to the present invention.
FIG. 3 is a schematic view showing a structure of a density detecting device of a fiber strand for a front spinning device or a fiber strand detecting device according to the present invention.
FIG. 4 is a schematic view of a detecting member according to the present invention.
FIG. 5 is another schematic view of the detecting member of the present invention.
Detailed Description
Referring to fig. 1 to 5, a method for detecting a density of a fiber strand of a pre-spinning device or a fiber strand detecting device includes
a. Arranging a detection piece 1 and a force sensor 2, wherein the detection piece 1 comprises a detection rod or a detection plate, one end of the detection piece 1 is set as a detection end 1-1, the detection piece is provided with a fulcrum 0, and the detection end 1-1 of the detection piece is arranged in a cotton guide 3 of a front spinning device or a beard strip detection device;
b. the fiber strand 8 moving in the cotton guide 3 acts on the detection end 1-1 of the detection piece 1, the acting force of the fiber strand 8 is transmitted to the force sensor 2 through the detection piece 1, and the force sensor 2 obtains a fiber strand density change signal according to the acting force to detect the density of the fiber strand 8; in the process that the fiber strand 8 transmits acting force to the force sensor 2 through the detection piece 1, the detection end 1-1 of the detection piece 1 bears the pressure of the fiber strand 8 in the cotton guide 3, and the detection piece 1 does not move. In the invention, after the force sensor 2 obtains the signal of the density change of the fiber strand, the density of the fiber strand 8 is detected by a conventional means, for example, the signal can be processed by a self-contained microprocessor to obtain a density detection result, and the signal can also be input into an electric controller, for example, a DDC digital controller or an industrial personal computer or a singlechip to be processed to obtain the density detection result.
In a preferred embodiment of the present invention, the acting force of the density change of the fiber strand on the force sensor 2 is amplified by the fulcrum 0 provided on the detecting member 1, so that the force sensor 2 can sense and detect the fine density change of the fiber strand 8.
In a preferred embodiment of the invention, the method further comprises c, detecting the density of the fiber strands 8 with different thicknesses by adjusting the position of the detection end 1-1 of the detection member 1 in the cotton guide 3.
In a preferred embodiment of the present invention, a pin 4 is preferably disposed on the frame 9 of the front spinning device or the fiber strand detecting device, and the pin 4 is used as the fulcrum 0 of the detecting member 1. In the present invention, when the force sensor 2 is removed, the detecting member 1 can rotate around the fulcrum 0, i.e. the pin 4.
A density detection device for a fiber strand of a fore-spinning device or a fiber strand detection device is disclosed, and referring to fig. 1 to 5, the fore-spinning device or the fiber strand detection device comprises a cotton guide 3 and a frame 9, the density detection device for the fiber strand comprises a detection piece 1 and a force sensor 2, the force sensor 2 can adopt a pressure sensor, preferably a strain gauge force sensor, the detection piece 1 comprises a detection rod or a detection plate, for example, the detection plate is shown in fig. 4, the detection rod is shown in fig. 5, one end of the detection piece 1 is a detection end 1-1, the detection end 1-1 of the detection piece 1 is arranged in the cotton guide 3, as shown in the figure, the detection end 1-1 is preferably arranged in a fiber strand channel 3a of the cotton guide 3, a pin shaft 4 is arranged on the fore-spinning device or the fiber strand detection device, the other end 1-2 of the detection piece 1 or a body of the detection piece 1 is arranged on the pin shaft 4, and the force sensor 2 is abutted against or connected, the connection can be detachable connection through bolts or fixed connection such as welding, and the force sensor 2 is installed on a front spinning device or a strand detection device, such as a rack 9.
As a preferred embodiment of the present invention, as shown in fig. 2 and 3, the pin 4 is used as a fulcrum 0 of the detecting element 1, and a distance L1 from the fulcrum 0 to the detecting end 1-1 is greater than a distance L2 from the fulcrum 0 to a position where the force sensor 2 abuts against or is connected with the detecting element 1, so that an acting force of a density change of the strands on the force sensor 2 can be amplified, a fine density change of the strands 8 can be sensed and detected by the force sensor 2, and a detection accuracy of the density of the strands can be greatly improved.
As a preferred embodiment of the present invention, as shown in fig. 2 and 3, the force-bearing axis of the force sensor 2 coincides with a tangent line 11 of an arc line 10 at the position where the force sensor 2 abuts against or is connected with the detecting element 1, with the center line of the pin 4, that is, the fulcrum 0, as a center of circle, so that the acting force of the whisker strip 8 transmitted to the force sensor 2 through the detecting element 1 can be guaranteed to be a positive pressure.
As a preferred embodiment of the present invention, as shown in fig. 1 to 5, the detecting end 1-1 of the detecting member 1 is provided with an arc surface 1 a. The cambered surface 1a is preferably an arc surface or an involute cambered surface.
In a preferred embodiment of the present invention, the pin 4 is fixedly mounted on a frame 9 of the fore-spinning device or the fiber strand detecting device, and the other end 1-2 of the detecting member 1 or the body of the detecting member 1 is rotatably mounted on the pin 4 preferably through a bearing or a shaft sleeve. In the invention, the pin shaft 4 can also be rotatably installed on a frame 9 of the fore-spinning device or the fiber strand detection device through a bearing, and the other end 1-2 of the detection piece 1 or the body of the detection piece 1 is fixedly installed on the pin shaft 4 or is rotatably installed on the pin shaft 4 through a bearing or a shaft sleeve.
As a preferred embodiment of the present invention, as shown in fig. 1, 2 and 3, the strand density detecting device further comprises a displacement mechanism, the displacement mechanism comprises a guide rail 5 and a linear motion mechanism, the guide rail 5 is mounted on a frame 9 of the fore-spinning device or the strand detecting device, and the force sensor 2 is driven by the linear motion mechanism to advance or retreat along the guide rail 5.
As shown in fig. 1, 2 and 3, the linear motion mechanism includes a motor 6 and a screw-nut pair, the force sensor 2 is connected with a nut 7 of the screw-nut pair, and the nut 7 is slidably connected with the guide rail 5. In the present invention, the linear motion mechanism may be configured to advance or retreat the nut 7 along the guide rail 5 by manually screwing the lead screw using only the lead screw-nut pair without using the motor 6. In the invention, the detection of the density of the fiber strands with different thicknesses can be realized only by electrically or manually adjusting the position of the force sensor 2 against or connected with the detection piece 1 through the displacement mechanism so as to change the position of the detection end 1-1 of the detection piece 1 in the fiber guide 3 in the preferred fiber strand channel 3 a. In the present invention, the linear motion mechanism may also be an electric push rod or an air cylinder, which is not shown in the figure.
Through tests, the density detection device can accurately detect the density of the fiber strands, can also accurately detect the fine density change of the fiber strands, and has the advantages of reasonable and simple structure, good repeatability, high reliability and good effect.
Claims (10)
1. A method for detecting the density of fiber strands of a fore-spinning device or a fiber strand detection device is characterized in that: comprises that
a. Arranging a detection piece and a force sensor, wherein the detection piece comprises a detection rod or a detection plate, one end of the detection piece is set as a detection end, the detection piece is provided with a fulcrum, and the detection end of the detection piece is arranged in a cotton guide of a front spinning device or a whisker strip detection device;
b. the fiber strand moving in the cotton guide acts on the detection end of the detection piece, the acting force of the fiber strand is transmitted to the force sensor through the detection piece, and the force sensor obtains a signal of fiber strand density change according to the acting force to detect the fiber strand density; in the process that the beard strip transmits acting force to the force sensor through the detection piece, the detection end of the detection piece bears the pressure of the beard strip in the cotton guide device, and the detection piece does not move.
2. The method for detecting the density of the fiber strands of the fore-spinning device or the fiber strand detecting device according to claim 1, wherein: the acting force of the density change of the fiber strands on the force sensor is amplified through the fulcrum arranged on the detection piece.
3. The method for detecting the density of the fiber strands of the pre-spinning apparatus or the fiber strand detecting apparatus according to claim 1 or 2, wherein: the method also comprises c, detecting the density of the fiber strands with different thicknesses by adjusting the position of the detection end of the detection piece in the cotton guide.
4. The method for detecting the density of the fiber strands of the fore-spinning device or the fiber strand detecting device according to claim 1, wherein: and arranging a pin shaft on the fore-spinning equipment or the whisker detecting equipment, and taking the pin shaft as a fulcrum of the detecting piece.
5. The utility model provides a device for detecting the density of whisker strips of preceding equipment of spinning or whisker strip check out test set, preceding equipment of spinning or whisker strip check out test set includes cotton guide (3), its characterized in that: the whisker strip density detection device comprises a detection piece (1) and a force sensor (2), wherein the detection piece (1) comprises a detection rod or a detection plate, one end of the detection piece (1) is a detection end (1-1), the detection end (1-1) of the detection piece (1) is arranged in a cotton guide (3), a pin shaft (4) is arranged on a front spinning device or whisker strip detection device, the other end (1-2) of the detection piece (1) or a body of the detection piece (1) is arranged on the pin shaft (4), the force sensor (2) is abutted to or connected with the detection piece (1), and the force sensor (2) is arranged on the front spinning device or whisker strip detection device.
6. The device for detecting the density of the fiber strands of a fore-spinning device or a fiber strand detecting device according to claim 5, wherein: the pin shaft (4) is used as a fulcrum of the detection piece (1), and the distance from the fulcrum to the detection end (1-1) is larger than the distance from the fulcrum to the position where the force sensor (2) abuts against or is connected with the detection piece (1).
7. The device for detecting the density of the fiber strands of a fore-spinning device or a fiber strand detecting device according to claim 5, wherein: the stress axis of the force sensor (2) coincides with the tangent of the arc line which takes the central line of the pin shaft (4) as the center of a circle and the butting part or the connecting part of the force sensor (2) and the detecting part (1).
8. The device for detecting the density of the fiber strands of a fore-spinning device or a fiber strand detecting device according to claim 5, wherein: the detection end (1-1) of the detection piece (1) is provided with an arc surface (1 a).
9. The device for detecting the density of the fiber strand of a fore-spinning apparatus or a fiber strand detecting apparatus according to any one of claims 5 to 8, wherein: the strand density detection device further comprises a displacement mechanism, the displacement mechanism comprises a guide rail (5) and a linear motion mechanism, the guide rail (5) is installed on the front spinning device or the strand detection device, and the force sensor (2) is driven by the linear motion mechanism to move forwards or backwards along the guide rail (5).
10. The device for detecting the density of the fiber strands of a front spinning apparatus or a fiber strand detecting apparatus according to claim 9, wherein: the linear motion mechanism comprises a motor (6) and a screw-nut pair, the force sensor (2) is connected with a nut (7) of the screw-nut pair, and the nut (7) is in sliding connection with the guide rail (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010961188.1A CN111999246A (en) | 2020-09-14 | 2020-09-14 | Method and device for detecting density of fiber strands of pre-spinning equipment or fiber strand detection equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010961188.1A CN111999246A (en) | 2020-09-14 | 2020-09-14 | Method and device for detecting density of fiber strands of pre-spinning equipment or fiber strand detection equipment |
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| CN202010961188.1A Pending CN111999246A (en) | 2020-09-14 | 2020-09-14 | Method and device for detecting density of fiber strands of pre-spinning equipment or fiber strand detection equipment |
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