Device and method for detecting moisture regain of cotton bundle fibers

Abstract

The invention discloses a cotton bouquet fiber moisture regain detecting device and method, and relates to the technical field of cotton detection.The cotton bouquet fiber moisture regain detecting device comprises an image collecting module, a sliding table module, a sampling comb clamping module and a breaking strength measuring module, and the sampling comb clamping module and the breaking strength measuring module are installed on the sliding table module; the sampling comb clamp module is used for sampling cotton bundle fibers to be detected and can be driven by the sliding table module to move, the image collecting module is used for collecting image information of the cotton bundle fibers to be detected, and the sliding table module can drive the breaking strength measuring module to move according to the image information collected by the image collecting module. After the to-be-detected cotton bundle fiber is moved to the breaking strength measuring module, the breaking strength measuring module can clamp the second side of the to-be-detected cotton bundle fiber, and the to-be-detected cotton bundle fiber is measured by a resistance method. According to the invention, rapid detection of cotton fiber moisture regain can be realized, and detection precision and detection efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cotton detection, in particular to a cotton bundle fiber moisture regain detection device and method. BACKGROUND

[0002] In the process of cotton grading, the moisture regain of cotton can seriously affect the detection results of quality indicators such as length and breaking strength. Rapid detection of moisture regain can compensate and correct the detection results of cotton quality.

[0003] Currently, the method for measuring the moisture regain of cotton fibers usually uses a direct method, for example, using a drying method to detect the moisture regain of cotton. The specific process is as follows: the selected cotton sample is placed in an oven, and the oven equipment is started to heat the cotton sample. When the oven reaches the set time, the oven door can be opened, the cotton sample is taken out, and the moisture regain is calculated. The detection accuracy of the above drying method is high, but it is time-consuming and low in efficiency.

[0004] In the prior art, there is also a method of using resistance to detect the moisture regain of cotton, but the existing resistance detection equipment is mainly designed for loose cotton, so it is only suitable for measuring the moisture regain of cotton in a lump shape. However, cotton quality detection is usually carried out by combing cotton fibers into a bundle shape for detection. Therefore, a moisture regain measurement method for bundle fibers is needed to compensate and correct the detection results of cotton quality. SUMMARY

[0005] The purpose of the present application is to provide a cotton bundle fiber moisture regain detection device and method to solve the problems existing in the prior art, realize rapid detection of the moisture regain of cotton bundle fibers, and improve the detection accuracy and efficiency.

[0006] To achieve the above purpose, the present application provides the following solutions: The present application provides a cotton bundle fiber moisture regain detection device, which comprises an image acquisition module, a sliding table module, a sampling comb module and a breaking strength measurement module installed on the sliding table module. The sampling comb module is used to clamp the first side of the cotton bundle fiber to be detected, and the sampling comb module can move under the drive of the sliding table module. The image acquisition module is used to acquire image information of the cotton bundle fiber to be detected. The sliding table module can drive the breaking strength measurement module to move according to the image information acquired by the image acquisition module, and make the cotton bundle fiber to be detected move to the breaking strength measurement module. The breaking strength measurement module can clamp the second side of the cotton bundle fiber to be detected, and measure the cotton bundle fiber to be detected by resistance method.

[0007] Preferably, the sliding table module comprises a transverse sliding rail, a longitudinal sliding rail and two driving mechanisms, the transverse sliding rail and the longitudinal sliding rail are respectively driven by one of the driving mechanisms, the transverse sliding rail and the longitudinal sliding rail are perpendicular to each other, the sampling comb module is slidingly connected to the transverse sliding rail and can move laterally along the transverse sliding rail, the longitudinal sliding rail is located on one side of the transverse sliding rail, and the breaking strength measurement module is slidingly installed on the longitudinal sliding rail and can move longitudinally along the longitudinal sliding rail.

[0008] Preferably, one side of the transverse sliding rail is further provided with a tank belt, the tank belt is connected to the sampling comb module, a fully-enclosed screw module is arranged in the transverse sliding rail, a power output end of the fully-enclosed screw module is connected to the sampling comb module, a power input end of the fully-enclosed screw module is connected to a power output end of the driving mechanism, the driving mechanism can drive the fully-enclosed screw module to move, and the fully-enclosed screw module can drive the sampling comb module to move laterally.

[0009] Preferably, the transverse sliding rail and the image acquisition module are both installed on the upper surface of the rack.

[0010] Preferably, the breaking strength measurement module comprises a longitudinal connecting plate, a measuring rack, a breaking strength measurement upper jaw, a breaking strength measurement lower jaw and a clamping driving element, the longitudinal connecting plate is installed on the rack, the longitudinal sliding rail is installed on the longitudinal connecting plate, the measuring rack is slidingly connected to the longitudinal sliding rail, the breaking strength measurement upper jaw and the breaking strength measurement lower jaw are both installed on the side of the measuring rack facing the transverse sliding rail, the breaking strength measurement upper jaw is fixedly installed on the measuring rack, the breaking strength measurement lower jaw is slidingly connected to the measuring rack, the driving element is connected to the breaking strength measurement lower jaw and can drive the breaking strength measurement lower jaw to move towards or away from the breaking strength measurement upper jaw, and a temperature and humidity sensor is installed on the measuring rack.

[0011] Preferably, the driving mechanism connected to the longitudinal sliding rail comprises a linear module and a linear connecting plate, the longitudinal sliding rail is a guide rod, both ends of the guide rod are respectively installed on the longitudinal connecting plate through a support, a linear bearing is connected to the outer periphery of the guide rod, the linear connecting plate is installed on one side of the linear module, the linear connecting plate is connected to one side of the linear bearing, and the other side of the linear bearing is connected to the measuring rack.

[0012] Preferably, the lower end of the lower jaw of the breaking strength measuring module is provided with a clamping connecting plate, the clamping connecting plate is slidingly connected to the measuring frame, the clamping driving element is a pneumatic cylinder, and the output shaft of the pneumatic cylinder is connected to the clamping connecting plate and can drive the clamping connecting plate and the lower jaw of the breaking strength measuring module to move towards or away from the upper jaw of the breaking strength measuring module.

[0013] Preferably, the sampling comb module is slidingly connected to the transverse slide rail through a sampling mounting plate, and the sampling comb module comprises a first sampling comb, a second sampling comb, a first upper clamping plate, a second upper clamping plate, a first comb cylinder, a second comb cylinder, a first comb rotating shaft, a second comb rotating shaft, a first resistance measuring circuit board and a second resistance measuring circuit board, the first sampling comb and the second sampling comb are respectively fixed on a comb fixed seat made of insulating material, the first comb cylinder is connected to one end of the first sampling comb through a crank, the second comb cylinder is connected to one end of the second sampling comb through a crank, the first comb rotating shaft and the second comb rotating shaft are respectively installed on the corresponding comb fixed seat, the first comb cylinder can hook one end of the fiber of the cotton bundle, the second comb cylinder can hook the other end of the fiber of the cotton bundle, the first resistance measuring circuit board and the second resistance measuring circuit board are both installed on the rear side of the sampling mounting plate, the first resistance measuring circuit board is electrically connected to the first sampling comb, the second resistance measuring circuit board is electrically connected to the second sampling comb, and the outer periphery of the first resistance measuring circuit board and the second resistance measuring circuit board is further provided with a circuit board shielding cover.

[0014] The application also provides a cotton bundle fiber moisture regain detection method using the cotton bundle fiber moisture regain detection device. The relative positions between the first sampling comb and the second sampling comb in the breaking strength measuring module and the sampling comb module are adjusted, one end of the prepared cotton bundle fiber is clamped by the sampling comb module, and the cotton bundle fiber is moved to each module for quality detection under the guidance of the slide module; at the image acquisition module, the image acquisition module is used to acquire images of the cotton bundle fiber, extract gray scale features to represent the thickness of the cotton layer, and determine whether the thickness of the cotton bundle fiber meets the requirements, in the process, the slide module drives the breaking strength measuring module to move to a fixed distance away from the first sampling comb and the second sampling comb, the upper jaw and the lower jaw of the breaking strength measuring module jointly clamp the other side of the cotton bundle fiber, and the resistance value is measured, at the same time, the temperature of the cotton bundle fiber is collected, and the collected resistance value information and temperature information are transmitted to the upper computer, and the upper computer corrects the thickness of the cotton bundle fiber in combination with the temperature to predict the moisture regain of the cotton bundle fiber.

[0015] The present invention achieves the following technical effects compared to the prior art: The cotton bundle fiber moisture regain detection device and method provided by this invention includes an image acquisition module, a slide module, and a sampling comb clamp module and a breaking strength measurement module installed on the slide module. The sampling comb clamp module is used to clamp the first side of the cotton bundle fiber to be tested, thereby ensuring that the cotton bundle fiber is in an unfolded state, which facilitates subsequent image acquisition and resistance measurement. This invention overcomes the limitations of traditional loose cotton clump fiber moisture regain detection, realizes rapid measurement of the moisture regain of cotton in bundle fiber form, and provides a reliable data basis for dynamic compensation of indicators such as breaking strength. The sampling comb clamp module can move under the drive of the slide module, thereby realizing the movement of the cotton bundle fiber. The image acquisition module is used to acquire images of the cotton bundle fiber to be tested. Image acquisition module obtains information such as the position and thickness of cotton bundle fibers. The slide module can move the breaking strength measurement module according to the image information acquired by the image acquisition module. After the cotton bundle fiber to be tested is moved to the breaking strength measurement module, the breaking strength measurement module can clamp the second side of the cotton bundle fiber to be tested and perform resistance measurement on the cotton bundle fiber to be tested. This realizes the adaptive adjustment of the position of the breaking strength measurement module. At the same time, according to the coupling effect of the distance between the two clamping electrode plates of the breaking strength measurement module and the thickness of the cotton bundle fiber on the resistance measurement, a more accurate cotton bundle fiber moisture regain can be obtained, thereby improving detection efficiency and detection accuracy, and realizing the detection of cotton bundle fiber moisture regain in large batches. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the cotton bundle fiber moisture regain detection device in Example 1; Figure 2 This is a schematic diagram of the fracture strength measurement module in Example 1; Figure 3 This is a partial structural schematic diagram of the fracture strength measurement module in Example 1; Figure 4 This is a partial structural diagram of the sampling comb clip module in Example 1; Figure 5 This is a cross-sectional view of the first sampling comb clip in Embodiment 1; Figure 6 This is a schematic diagram of the resistance measurement of the fracture strength measurement module in Example 1; Figure 7This is a flowchart of the cotton bundle fiber moisture regain detection process in Example 2; Figure 8 This is a fitted regression curve of the electrical resistance and moisture regain of the cotton bundle fibers in Example 2; Figure 9 This is a curve showing the fitting of the model prediction and the actual value of the moisture regain of cotton bundle fibers in Example 2.

[0018] In the diagram: 1-Frame, 2-Slide table module, 3-Sampling comb clamp module, 4-Image acquisition module, 5-Breaking strength measurement module, 6-Limit key, 7-Comb teeth, 8-Comb clamp fixing seat, 9-Sampling bolt, 10-Clamping suction port, 11-Breaking strength measuring upper jaw, 12-Breaking strength measuring lower jaw, 13-Support, 14-Guide rod, 15-Linear bearing, 16-Clamping connecting plate, 17-Measuring frame, 18-Clamping cylinder, 19-Linear connection 20-Linear module, 21-Triangular block, 22-Sampling mounting plate, 23-First comb clamp cylinder, 24-First upper clamp plate, 25-First resistance measurement circuit board, 26-First sampling comb clamp, 27-First comb clamp shaft, 28-Second comb clamp shaft, 29-Second resistance measurement circuit board, 30-Second upper clamp plate, 31-Second sampling comb clamp, 32-Second comb clamp cylinder, 33-Fully enclosed screw module, 34-Tank belt, 35-Cotton bundle fiber. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The purpose of this invention is to provide a cotton bundle fiber moisture regain detection device and method to solve the problems existing in the prior art, realize rapid detection of cotton bundle fiber moisture regain, and improve detection accuracy and efficiency.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1 like Figures 1-6As shown, this embodiment provides a cotton bundle fiber moisture regain detection device, including an image acquisition module 4, a slide module 2, and a sampling comb clamp module 3 and a breaking strength measurement module 5 installed on the slide module 2. The sampling comb clamp module 3 is used to clamp the first side of the cotton bundle fiber 35 to be tested, thereby ensuring that the cotton bundle fiber 35 is in an unfolded state, which facilitates subsequent image acquisition and resistance measurement. It breaks through the limitations of traditional loose cotton clump fiber moisture regain detection, realizes rapid measurement of cotton moisture regain in bundle fiber form, and provides a reliable data basis for dynamic compensation of indicators such as breaking strength. The sampling comb clamp module 3 can move under the drive of the slide module 2, thereby realizing the movement of the cotton bundle fiber 35. The image acquisition module 4 is used to acquire images of the cotton bundle fiber 35 to be tested. The slide module 2 can move the breaking strength measurement module 5 according to the image information acquired by the image acquisition module 4, and move the cotton bundle fiber 35 to be tested to the breaking strength measurement module 5. After the cotton bundle fiber 35 to be tested is moved to the breaking strength measurement module 5, the breaking strength measurement module 5 can clamp the second side of the cotton bundle fiber 35 to be tested and perform resistance measurement on the cotton bundle fiber 35 to be tested. This realizes the adaptive adjustment of the position of the breaking strength measurement module 5. At the same time, according to the coupling effect of the distance between the two clamping electrode plates of the breaking strength measurement module 5 and the thickness of the cotton bundle fiber 35 on the resistance measurement, a more accurate moisture regain of the cotton bundle fiber 35 can be obtained, thereby improving the detection efficiency and detection accuracy, and realizing the detection of the moisture regain of cotton bundle fiber 35 in large batches.

[0023] Specifically, the slide module 2 includes a transverse slide rail, a longitudinal slide rail, and two drive mechanisms. The transverse and longitudinal slide rails are driven by a drive mechanism respectively, and the transverse and longitudinal slide rails are perpendicular to each other. The sampling comb clamp module 3 is slidably connected to the transverse slide rail, and the sampling comb clamp module 3 can move laterally along the transverse slide rail, thereby realizing the lateral movement of the cotton bundle fiber 35, so as to move the cotton bundle fiber 35 to the image acquisition module 4 for image acquisition, and to the breaking strength measurement module 5 for resistance value measurement. The longitudinal slide rail is located on one side of the transverse slide rail, and the breaking strength measurement module 5 is slidably installed on the longitudinal slide rail, and the breaking strength measurement module 5 can move longitudinally along the longitudinal slide rail to move towards or away from the transverse slide rail, ensuring that it can contact the cotton bundle fiber 35 and measure the resistance value of the cotton bundle fiber 35.

[0024] As a preferred embodiment, a tank belt 34 is also provided on one side of the transverse slide rail. The tank belt 34 is connected to the sampling comb clamp module 3, which facilitates the stable movement of the sampling comb clamp module 3. A fully enclosed screw module 33 is provided inside the transverse slide rail. The power output end of the fully enclosed screw module 33 is connected to the sampling comb clamp module 3, and the power input end of the fully enclosed screw module 33 is connected to the power output end of the drive mechanism. The drive mechanism can drive the fully enclosed screw module 33 to move and cause the fully enclosed screw module 33 to move the sampling comb clamp module 3 laterally.

[0025] The horizontal slide rail and the image acquisition module 4 are both mounted on the upper surface of the frame 1. The frame 1 is provided with support legs at the bottom to raise the frame 1 for easy observation and operation.

[0026] The breaking strength measurement module 5 includes a longitudinal connecting plate, a measuring frame 17, a breaking strength measuring upper jaw 11, a breaking strength measuring lower jaw 12, and a clamping drive element. There are two longitudinal connecting plates, symmetrically mounted on the frame 1, and two longitudinal slide rails are respectively mounted on the two longitudinal connecting plates. A triangular block 21 is also provided at the lower end of the longitudinal connecting plate to improve overall strength. The two sides of the measuring frame 17 are slidably connected to the longitudinal slide rails, facilitating simultaneous guidance of the measuring frame 17 via the two longitudinal slide rails. The breaking strength measuring upper jaw 11 and the breaking strength measuring lower jaw 12 are both mounted on the side of the measuring frame 17 facing the transverse slide rail. The breaking strength measuring upper jaw 11 and the breaking strength measuring lower jaw 12 are used to clamp cotton bundle fibers 35. When the cotton bundle fibers 35 are between the two... When the resistance of the cotton fiber bundle 35 is measured, it can be regarded as a resistor. The upper jaw 11 for measuring the breaking strength is fixedly installed on the measuring frame 17, and the lower jaw 12 for measuring the breaking strength is slidably connected to the measuring frame 17. The driving element is connected to the lower jaw 12 for measuring the breaking strength and can drive the lower jaw 12 for measuring the breaking strength to move closer to or further away from the upper jaw 11 for measuring the breaking strength, thereby adjusting the distance between the upper jaw 11 and the lower jaw 12 for measuring the breaking strength. As a preferred embodiment, the distance between the upper jaw 11 and the lower jaw 12 for measuring the breaking strength is 1mm-3mm. A temperature and humidity sensor is installed on the measuring frame 17 for detecting the temperature and humidity of the cotton fiber bundle 35. A clamping air intake 10 is also provided at the upper end of the measuring frame 17.

[0027] The drive mechanism connecting the longitudinal slide rail includes a linear module 20 and a linear connecting plate 19. The longitudinal slide rail is a guide rod 14. Both ends of the guide rod 14 are respectively mounted on the longitudinal connecting plate through a bracket 13 to fix the guide rod 14 so as to guide the measuring frame 17. A linear bearing 15 is connected to the outer periphery of the guide rod 14. The linear connecting plate 19 is installed on one side of the linear module 20 and connected to one side of the linear bearing 15. The other side of the linear bearing 15 is connected to the measuring frame 17 so as to realize the movement of the measuring frame 17 through the drive of the linear module 20.

[0028] The lower end of the fracture strength measuring jaw 12 is provided with a clamping connecting plate 16. The clamping connecting plate 16 is slidably connected to the measuring frame 17. The clamping driving element is a cylinder. The output shaft of the cylinder is connected to the clamping connecting plate 16 and can drive the clamping connecting plate 16 and the fracture strength measuring jaw 12 to move closer to or further away from the fracture strength measuring upper jaw 11, thereby realizing the adjustment of the distance between the fracture strength measuring upper jaw 11 and the fracture strength measuring jaw 12.

[0029] The sampling comb clamp module 3 is slidably connected to the transverse slide rail via a sampling mounting plate 22. The sampling comb clamp module 3 includes a first sampling comb clamp 26, a second sampling comb clamp 31, a first upper clamping plate 24, a second upper clamping plate 30, a first comb clamp cylinder 23, a second comb clamp cylinder 32, a first comb clamp rotating shaft 27, a second comb clamp rotating shaft 28, a first resistance measuring circuit board 25, and a second resistance measuring circuit board 29. The first sampling comb clamp 26 and the second sampling comb clamp 31 are respectively fixed on a comb clamp fixing seat 8. Both the first sampling comb clamp 26 and the second sampling comb clamp 31 are in the shape of comb teeth 7 that can fit together vertically. The comb teeth 7 are installed on the corresponding comb clamp fixing seat 8. The comb teeth 7 can hook the end of the cotton bundle fiber 35, thereby cooperating with the limiting key 6 to realize the cotton bundle fiber 35 The first upper clamping plate 24 and the second upper clamping plate 30 are respectively installed on the comb clamp fixing seat 8 by sampling bolts 9. The comb clamp fixing seat 8 is made of insulating material. The first comb clamp cylinder 23 is connected to one end of the first sampling comb clamp 26 by a crank, and the second comb clamp cylinder 32 is connected to one end of the second sampling comb clamp 31 by a crank. The first comb clamp rotating shaft 27 and the second comb clamp rotating shaft 28 are respectively installed on the corresponding comb clamp fixing seat 8. The first comb clamp cylinder 23 can drive the opening and closing of the first sampling comb clamp 26, thereby driving the first sampling comb clamp 26 to hook one end of the cotton bundle fiber 35. The second comb clamp cylinder 32 can drive the opening and closing of the second sampling comb clamp 31, thereby driving the second sampling comb clamp 31 to open and close. 1. Hooking the other end of the cotton bundle fiber 35, as a specific solution in this embodiment, the first comb clamp cylinder 23 is fixed to the Y-type interface by a threaded connection. The Y-type interface is connected to the hook-type connector by a pin. There are open retaining rings between the two ends of the pin and the outside of the Y-type interface to fix the Y-type interface. The Y-type interface and the comb clamp fixing seat 8 are both insulated from the frame 1. The first comb clamp rotating shaft 27 is positioned by the hook-type connector. The first sampling comb clamp 26 is fixed to the comb clamp fixing seat 8 by bolts. The second comb clamp cylinder 32 is similar. In addition, the first comb clamp rotating shaft 27 and the second comb clamp rotating shaft 28 are both provided with keyways, which cooperate with the corresponding limit keys 6 to improve the stability of the first comb clamp rotating shaft 27 and the second comb clamp rotating shaft 28. The first resistance measuring circuit board 25 and The second resistance measurement circuit board 29 is mounted on the rear side of the sampling mounting plate 22. The first resistance measurement circuit board 25 is electrically connected to the first sampling comb 26, and the second resistance measurement circuit board 29 is electrically connected to the second sampling comb 31. The first resistance measurement circuit board 25 and the second resistance measurement circuit are provided with positive and negative electrodes and several through holes. Then, they are connected to the first sampling comb 26 and the second sampling comb respectively through the electrode measurement lines arranged in inner and outer layers. The electrode measurement lines are fixed on the electrode interfaces of the first sampling comb 26 and the second sampling comb 31. The outer periphery of the first resistance measurement circuit board 25 and the second resistance measurement circuit board 29 is also covered with a circuit board shielding cover to protect the first resistance measurement circuit board 25 and the second resistance measurement circuit board 29.

[0030] The first sampling comb 26 and the second sampling comb 31 can also be used in conjunction with the existing cotton fiber sampling module to complete the sample preparation of cotton bundle fiber 35. The first sampling comb 26 and the second sampling comb 31 jointly drive the cotton bundle fiber 35 to move. At the same time, when the first sampling comb 26 and the second sampling comb 31 clamp the cotton bundle fiber 35, they act as an electrode and are insulated from the entire frame 1. Thus, the measured resistance is the cotton bundle fiber 35 between the first sampling comb 26, the second sampling comb 31, and the breaking strength measuring upper jaw 11 and the breaking strength measuring lower jaw 12.

[0031] The specific coordination process of the first sampling comb 26, the second sampling comb 31, and the cotton fiber sampling module is as follows: The testing personnel first turn on the air pump of the cotton fiber sampling module to ensure that the negative pressure airflow of the entire system testing environment is smooth. A cotton sample is randomly selected and divided into two samples, left and right, and placed into the sampling port I and sampling port II of the cotton fiber sampling module, respectively. The start button is pressed, and the two sampling ports are connected to the corresponding sampling rollers. The cotton sample is pressed by the cotton sample pressure plate inside the sampling roller, so that the cotton fiber passes through the round hole arc sampling plate. The roller drives the round hole arc sampling plate to rotate around the axis, so that the first sampling comb 26 and the second sampling comb 31 scrape the cotton fiber, completing the random automated sampling. After the central control program controls the delay, the first sampling comb 26 and the second sampling comb 31 move the cotton fiber to the sampling platform of the cotton fiber brushing module, where the industrial brush brushes the sample, completing the automated brushing and realizing the sample preparation of cotton bundle fiber 35.

[0032] In practical application, when the upper jaw 11 and the lower jaw 12 of the breaking strength measuring device close and clamp the cotton bundle fiber 35, they can serve as an electrode and can be directly connected to the frame 1. The comb clamp fixing seat 8 constitutes another electrode and is insulated from the frame 1. A contact pin is in contact at the comb clamp fixing seat 8 and the contact pin is connected to the circuit board through the SMA line.

[0033] The image acquisition module 4 includes an image acquisition bracket, a CCD camera, a computer, an LED surface light source, an air intake, an optical glass plate, a detection stage, and a pneumatic slide. The CCD camera is mounted on top of the image acquisition bracket and is electrically connected to the computer via a data cable. The LED surface light source is mounted below the bracket, with its center aligned with the center of the CCD camera, for real-time acquisition of grayscale images of cotton fiber bundles and extraction of thickness features. Simultaneously, the CCD camera acquires images of cotton fiber bundles, and batch preprocesses the acquired images to obtain images of specific sizes. MATLAB software is used to read the cotton fiber bundle images, and the Otsu algorithm is used to analyze the grayscale distribution of the images to determine the optimal threshold. The air intake is located on an air intake box, with two pairs of vertically distributed grooves at the air intake. A cotton suction pipe is located behind the air intake. Two optical glass plates are installed in the two pairs of grooves, with the air intake facing the central opening of the optical glass plate. The pneumatic slide is equipped with a pneumatic valve, and the pneumatic slide can move longitudinally under the control of an external air source device.

[0034] In practical application, the system is first started, the first comb clamp cylinder 23 and the second comb clamp cylinder 32 are opened, and the prepared cotton bundle fibers 35 are placed into the first sampling comb clamp 26 and the second sampling comb clamp 31 respectively. After placement, the first comb clamp cylinder 23 and the second comb clamp cylinder 32 automatically close. The fully enclosed screw module 33 drives the sampling comb clamp module 3 to move laterally to the breaking strength measurement module 5. The breaking strength measuring jaw 12 moves upward under the action of the clamping cylinder 18. When the breaking strength measuring jaw 11 contacts the cotton, it acquires the cotton sample resistance information. The measured resistance value is converted into the moisture regain value of the cotton bundle fiber 35 using a formula, thus completing the real-time detection of the moisture regain of the cotton bundle fiber 35. The relationship between resistance and moisture regain is as follows: Figure 6 As shown.

[0035] Example 2 like Figures 7-9 As shown, this embodiment provides a method for detecting the moisture regain of cotton bundle fibers 35. Using the cotton bundle fiber moisture regain detection device from Embodiment 1, and with logic control via PLC, it can complete the three main processes of cotton bundle fiber 35 sampling, image acquisition, and moisture regain detection. In application, the length and thickness of the cotton bundle fiber 35 between the two clamping electrode plates affect the resistance measurement. The moisture regain and temperature of the cotton bundle fiber 35 also affect its resistivity. Therefore, a resistance-image synchronous acquisition platform must first be built. The cotton layer thickness is characterized by image features. The coupling mechanism between electrode spacing and cotton layer thickness on the resistance measurement value is explored to determine the optimal cotton bundle fiber 35 moisture regain detection scheme and construct a moisture regain prediction model suitable for bundled fibers. Specifically, the method also includes the following steps: Adjust the relative positions between the first sampling comb 26 and the second sampling comb 31 in the breaking strength measurement module 5 and the sampling comb module 3; select a sample of the prepared cotton bundle fiber 35 and clamp both ends of the cotton bundle fiber 35 through the sampling comb module 3; move the sampling comb module 3 through the slide module 2, and bring the sampling comb module 3 clamping the cotton bundle fiber 35 to the image acquisition module 4; acquire images of the cotton bundle fiber 35 through the image acquisition module 4, extract grayscale features to characterize the cotton layer thickness, and determine the strength of the cotton bundle fiber 35. To determine if the thickness meets the requirements, the slide module 2 moves the breaking strength measurement module 5 to a fixed distance from the first sampling comb clamp 26 and the second sampling comb clamp 31. The breaking strength measuring upper jaw 11 and the breaking strength measuring lower jaw 12 jointly clamp the other side of the cotton bundle fiber 35 and measure the resistance value. At the same time, the temperature of the cotton bundle fiber 35 is collected, and the collected resistance value information and temperature information are transmitted to the host computer. The host computer predicts the moisture regain of the cotton bundle fiber 35 based on the thickness of the cotton bundle fiber 35 and the temperature correction.

[0036] In practical applications, this embodiment can simultaneously collect the resistance value, temperature, and image features of 35 cotton fiber samples with different moisture regain rates, and construct a machine learning prediction model, using resistance and temperature as input variables, to output a predicted moisture regain value.

[0037] This embodiment, through the above design, achieves economical and practical application in the detection and application of 35% moisture regain of cotton bundle fibers, with high detection efficiency and accuracy. It can realize the detection of 35% moisture regain of cotton bundle fibers in large batches and provides technical support for dynamic compensation of physical performance indicators such as cotton breaking strength. It solves the technical problems of low efficiency and low accuracy in moisture regain detection, thereby promoting the development of intelligent cotton quality detection technology. At the same time, it can also provide theoretical support for the development of moisture regain sensing technology for other fibrous materials.

[0038] This embodiment provides a method for predicting the moisture regain of cotton bundle fibers 35 based on the resistance method, and verifies the optimal parameter selection and universality of the detection of cotton bundle fibers 35 moisture regain. Based on the coupling effect of the distance between the first and second resistance measuring electrode plates and the thickness of the cotton bundle fibers 35 on the resistance measurement, it is found that the resistance value measurement is positively correlated with the electrode spacing. The thickness is characterized by cotton fiber image features, and the grayscale image features of cotton fibers have a high correlation with resistance. Using grayscale image features to determine cotton fiber thickness, a decrease in cotton layer thickness significantly increases the resistance measurement error. Therefore, a 2mm electrode spacing is proposed as the optimal detection parameter, and under this parameter, there is no significant difference in the resistance of cotton bundle fibers 35 of different qualities, verifying the robustness of this method to fiber heterogeneity.

[0039] This embodiment also constructed and validated a moisture regain detection model. Resistance is negatively correlated with temperature and moisture regain. The resistance-temperature bivariate prediction model constructed based on the random forest algorithm has the best performance. The validation data standard deviation range shows that the model has good stability.

[0040] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A device for detecting the moisture regain of cotton bundle fibers, characterized in that: The device includes an image acquisition module, a slide module, and a sampling comb clamp module and a breaking strength measurement module mounted on the slide module. The sampling comb clamp module is used to clamp the first side of the cotton bundle fiber to be tested, and the sampling comb clamp module can move under the drive of the slide module. The image acquisition module is used to acquire image information of the cotton bundle fiber to be tested. The slide module can drive the breaking strength measurement module to move according to the image information acquired by the image acquisition module. After the cotton bundle fiber to be tested is moved to the breaking strength measurement module, the breaking strength measurement module can clamp the second side of the cotton bundle fiber to be tested and perform resistance measurement on the cotton bundle fiber to be tested.

2. The cotton bundle fiber moisture regain detection device according to claim 1, characterized in that: The slide module includes a transverse slide rail, a longitudinal slide rail, and two drive mechanisms. The transverse slide rail and the longitudinal slide rail are each driven by one of the drive mechanisms and are perpendicular to each other. The sampling comb clamp module is slidably connected to the transverse slide rail and can move laterally along the transverse slide rail. The longitudinal slide rail is located on one side of the transverse slide rail. The fracture strength measurement module is slidably mounted on the longitudinal slide rail and can move longitudinally along the longitudinal slide rail.

3. The cotton bundle fiber moisture regain detection device according to claim 2, characterized in that: A tank belt is also provided on one side of the transverse slide rail, and the tank belt is connected to the sampling comb clamp module; a fully enclosed lead screw module is provided inside the transverse slide rail, the power output end of the fully enclosed lead screw module is connected to the sampling comb clamp module, the power input end of the fully enclosed lead screw module is connected to the power output end of the drive mechanism, and the drive mechanism can drive the fully enclosed lead screw module to move, and the fully enclosed lead screw module can drive the sampling comb clamp module to move laterally.

4. The cotton bundle fiber moisture regain detection device according to claim 2, characterized in that: Both the transverse slide rail and the image acquisition module are mounted on the upper surface of the frame.

5. The cotton bundle fiber moisture regain detection device according to claim 4, characterized in that: The fracture strength measurement module includes a longitudinal connecting plate, a measuring frame, a fracture strength measuring upper jaw, a fracture strength measuring lower jaw, and a clamping drive element. The longitudinal connecting plate is mounted on the frame, and the longitudinal slide rail is mounted on the longitudinal connecting plate. The measuring frame is slidably connected to the longitudinal slide rail. The fracture strength measuring upper jaw and the fracture strength measuring lower jaw are both mounted on the side of the measuring frame facing the transverse slide rail. The fracture strength measuring upper jaw is fixedly mounted on the measuring frame, and the fracture strength measuring lower jaw is slidably connected to the measuring frame. The drive element is connected to the fracture strength measuring lower jaw and can drive the fracture strength measuring lower jaw to move closer to or away from the fracture strength measuring upper jaw. A temperature and humidity sensor is installed on the measuring frame.

6. The cotton bundle fiber moisture regain detection device according to claim 5, characterized in that: The drive mechanism connecting the longitudinal slide rail includes a linear module and a linear connecting plate. The longitudinal slide rail is a guide rod. Both ends of the guide rod are respectively mounted on the longitudinal connecting plate via a bracket. A linear bearing is connected to the outer periphery of the guide rod. The linear connecting plate is mounted on one side of the linear module and connected to one side of the linear bearing. The other side of the linear bearing is connected to the measuring frame.

7. The cotton bundle fiber moisture regain detection device according to claim 5, characterized in that: The lower end of the fracture strength measuring jaw is provided with a clamping connecting plate, which is slidably connected to the measuring frame. The clamping driving element is a cylinder, and the output shaft of the cylinder is connected to the clamping connecting plate and can drive the clamping connecting plate and the fracture strength measuring jaw to move closer to or away from the fracture strength measuring upper jaw.

8. The cotton bundle fiber moisture regain detection device according to claim 2, characterized in that: The sampling comb clamp module is slidably connected to the transverse slide rail via a sampling mounting plate. The sampling comb clamp module includes a first sampling comb clamp, a second sampling comb clamp, a first upper clamping plate, a second upper clamping plate, a first comb clamp cylinder, a second comb clamp cylinder, a first comb clamp rotating shaft, a second comb clamp rotating shaft, a first resistance measuring circuit board, and a second resistance measuring circuit board. The first sampling comb clamp and the second sampling comb clamp are respectively fixed to a comb clamp fixing seat, which is made of insulating material. The first comb clamp cylinder is connected to one end of the first sampling comb clamp via a crank, and the second comb clamp cylinder is connected to one end of the second sampling comb clamp via a crank. A comb clamp rotating shaft and a second comb clamp rotating shaft are respectively installed on corresponding comb clamp fixing seats. The first comb clamp cylinder can drive the first sampling comb clamp to hook one end of the cotton bundle fiber, and the second comb clamp cylinder can drive the second sampling comb clamp to hook the other end of the cotton bundle fiber. The first resistance measuring circuit board and the second resistance measuring circuit board are both installed on the rear side of the sampling mounting plate, and the first resistance measuring circuit board is electrically connected to the first sampling comb clamp, and the second resistance measuring circuit board is electrically connected to the second sampling comb clamp. The outer periphery of the first resistance measuring circuit board and the second resistance measuring circuit board is also covered with a circuit board shielding cover.

9. A method for detecting the moisture regain of cotton bundle fibers, characterized in that: Using the cotton bundle fiber moisture regain detection device according to any one of claims 1-8 includes the following steps: Adjust the relative positions between the first and second sampling combs in the breaking strength measurement module and the sampling comb module; select a sample of prepared cotton fiber bundle and clamp both ends of the cotton fiber bundle using the sampling comb module; move the sampling comb module via the slide module, and bring the cotton fiber bundle clamped by the sampling comb module to the image acquisition module. The image acquisition module acquires images of the cotton fiber bundle, extracts grayscale features to characterize the cotton layer thickness, and determines whether the thickness of the cotton fiber bundle meets the requirements. During this process, the slide module moves the breaking strength measurement module to a fixed distance from the first and second sampling combs. The upper and lower jaws of the breaking strength measurement module clamp the other side of the cotton fiber bundle and measure the resistance value. Simultaneously, the temperature of the cotton fiber bundle is acquired, and the acquired resistance and temperature information is transmitted to the host computer. The host computer predicts the moisture regain of the cotton fiber bundle based on the thickness of the cotton fiber bundle and temperature correction.

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