Intelligent detection system and method for breaking specific strength of cotton fiber

Abstract

The invention discloses an intelligent detection system and method for the fracture specific strength of cotton fibers, and relates to the technical field of cotton fiber detection, and the intelligent detection system for the fracture specific strength of the cotton fibers comprises a sampling module, an image acquisition module, a resistance measurement module, a strength measurement module and a central control module. The sampling module is used for sampling on a cotton fiber sample and constructing the sample into a to-be-detected cotton fiber bundle; the image acquisition module is used for acquiring image information of a to-be-detected cotton fiber bundle; the resistance measurement module is used for measuring resistance information of the to-be-detected cotton fiber bundle; the strength measurement module is used for snapping the to-be-detected cotton fiber bundle from a fracture area of the to-be-detected cotton fiber bundle and recording real-time tension information and displacement information of the fracture area; the central control module is in communication connection with the image acquisition module, the resistance measurement module and the strength measurement module. According to the invention, the detection of the cotton fiber fracture specific strength in a non-standard laboratory environment can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of cotton fiber detection, and in particular to an intelligent detection system and method for cotton fiber breaking strength. Background Art

[0002] Cotton is an important strategic material in my country, occupying a crucial position in the national economy and social development. my country is not only a major cotton producer, but also a significant cotton importer. In the production, processing, and trade of cotton, cotton quality testing and grading are particularly important. In textile enterprises, cotton quality testing is used to select cotton to improve spinning quality. In the cotton trade, cotton quality grading serves as a reference for cotton trading prices. Common cotton indicators include length, micronaire, breaking strength, color grade, and short fiber content. These indicators reflect the quality of cotton. Breaking strength is one of these indicators. Relevant research shows that the breaking strength of a fiber has the greatest impact on yarn strength. Therefore, the evaluation of breaking strength plays an important role in determining cotton fiber quality and evaluating the quality of cotton fabrics.

[0003] The test instruments commonly used to measure the breaking strength of cotton bundle fibers include the Stello tensile tester, the Pu tester, the Y162 bundle fiber strength tester, etc. When measuring the breaking strength of bundle fibers, the above-mentioned testing instruments first need to prepare samples manually, comb the cotton samples into bundle fibers of fixed width, and then manually clamp them in the testing instrument. The cotton fibers are broken by mechanical or electronic methods to measure the fiber breaking strength. The broken fiber bundles are collected and weighed, and finally the breaking strength of the cotton bundle fibers is calculated. In addition, the test results need to be calibrated with standard cotton samples. The traditional sample preparation process is cumbersome and has a lot of manual interference. The quality of sample preparation has a great influence on the test results. The entire measurement process has a low degree of automation and low efficiency, and the test results are unstable. In addition, the test environment requirements are high. Before testing, the cotton samples need to be equilibrated in a constant temperature and humidity environment with a temperature of (20±2)℃ and a relative humidity of (65±3)% for 24 hours before testing.

[0004] Currently, the primary instrument for testing the specific breaking strength of cotton bundles both domestically and internationally is the Uster High Voltage Instrument (HVI) large-capacity cotton fiber tester. This instrument is a leading tool for cotton quality grading and testing both domestically and internationally, capable of measuring cotton length, specific breaking strength, micronaire value, color grade, and short fiber content. my country began introducing this instrument in the 1980s, and Uster's HVI 1000 is widely used in Chinese cotton inspection laboratories. This instrument uses light flux to automatically measure cotton fiber length and specific breaking strength. Cotton samples are equilibrated in a constant temperature and humidity chamber for 24 hours before testing to ensure consistent moisture regain. Imported from the United States, the HVI testing system is expensive, requiring high standards for both the operating environment and the personnel involved. Furthermore, relevant research has shown that specific breaking strength is significantly affected by moisture regain. These instruments require testing cotton samples in a constant temperature and humidity environment, making them difficult to adapt to testing during the procurement process. Therefore, the ability to test specific breaking strength in non-standard laboratory environments is crucial for guiding cotton procurement and processing. Summary of the Invention

[0005] The purpose of the present invention is to provide an intelligent detection system and method for cotton fiber breaking strength to solve the problems existing in the above-mentioned prior art and realize the detection of cotton fiber breaking strength in a non-standard laboratory environment.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides an intelligent detection system for cotton fiber breaking strength, comprising:

[0008] A sampling module is used to sample the cotton fiber sample and construct the sample into a cotton fiber bundle to be tested;

[0009] An image acquisition module, used for acquiring image information of the cotton fiber bundle to be detected;

[0010] a resistance measuring module, used for measuring the resistance information of the cotton fiber bundle to be detected;

[0011] A strength measurement module, configured to break the cotton fiber bundle to be tested from the breaking region of the cotton fiber bundle to be tested, and record real-time tension information and displacement information of the breaking region;

[0012] A central control module is communicatively connected to the image acquisition module, the resistance measurement module, and the strength measurement module; the central control module selects the broken area of ​​the cotton fiber bundle to be detected based on the image information and determines the weight of the broken area; the central control module determines the moisture regain based on the resistance information; the central control module determines the breaking strength of the cotton fiber bundle to be detected based on the tension information and the displacement information; the central control module determines the breaking specific strength based on the breaking strength, the weight of the fibers in the broken area of ​​the cotton fiber bundle to be detected, and the moisture regain of the cotton fiber bundle to be detected.

[0013] Preferably, it also includes a temperature and humidity sensor, which is used to detect the ambient temperature and humidity. The central control module determines the moisture regain based on the resistance information and temperature and humidity information of the cotton fiber bundle to be detected.

[0014] Preferably, a cotton fiber brushing module is further included, which is used to brush off free fibers on the surface of the cotton fiber bundle to be detected and straighten the cotton fiber bundle to be detected before image acquisition, resistance measurement and strength measurement.

[0015] Preferably, it also includes a fiber clamping mechanism and a first slide module, the fiber clamping mechanism is used to clamp the cotton fiber bundle to be detected obtained by sampling the sampling module, the fiber clamping mechanism is arranged on the first slide module, the sampling module, the image acquisition module, the resistance measurement module and the strength measurement module are arranged on the same side of the first slide module, and the first slide module can drive the fiber clamping mechanism to move and transfer the cotton fiber bundle to be detected to the image acquisition station of the image acquisition module, the resistance measurement station of the resistance measurement module and the strength measurement station of the strength measurement module.

[0016] Preferably, the image acquisition module includes a light source, a fan, a suction channel, a suction channel driving device and a camera, the suction channel is connected to the air inlet of the fan, one end of the suction channel is a suction port, at least the upper and lower parts of the suction channel are constructed of transparent materials, the camera is located directly above the suction channel, the light source is located directly below the suction channel, the suction port is used to generate negative pressure to straighten the cotton fiber bundle to be detected, and the suction channel driving device can drive the suction port close to and away from the cotton fiber bundle to be detected.

[0017] Preferably, the force measurement module includes a front clamp group, a rear clamp group, a tension sensor and a clamp cylinder, the front clamp group and the rear clamp group are used to clamp both sides of the length direction of the fracture area, the rear clamp group is connected with the tension sensor, the tension sensor is connected to the clamp cylinder, the clamp cylinder can drive the tension sensor to drive the rear clamp group to move away from the front clamp group, the tension sensor and the servo motor of the clamp cylinder are communicated with the central control module, and the central control module calculates the displacement information based on the pulse signal of the servo motor.

[0018] Preferably, the force measurement station and the resistance measurement station are at the same position, the resistance measurement module includes a resistance measurement circuit board and an SMA signal line, the fiber clamping mechanism is connected to the resistance measurement circuit board through the SMA signal line, and the front clamping group is connected to the resistance measurement circuit board through the SMA signal line.

[0019] Preferably, the force measurement module is arranged on a second slide module, and the second slide module can drive the force measurement module to move along the length direction of the cotton fiber bundle to be detected at the force measurement station.

[0020] The present invention also provides an intelligent detection method for cotton fiber breaking strength, comprising:

[0021] Obtaining a cotton fiber bundle to be tested;

[0022] Acquire image information of the cotton fiber bundle to be detected;

[0023] Obtaining resistance information of the cotton fiber bundle to be tested and ambient temperature information;

[0024] Breaking the cotton fiber bundle to be tested from the fracture area of ​​the cotton fiber bundle to be tested and obtaining the real-time tension;

[0025] The broken area of ​​the cotton fiber bundle to be detected, the position of the broken area, and the weight of the fibers in the broken area are determined based on the image information; the moisture regain is determined based on the resistance information and the ambient temperature information; the breaking strength is determined based on the tensile force information; and the breaking strength ratio is predicted based on the breaking strength, the weight of the fibers in the broken area, and the moisture regain.

[0026] Preferably, the position of the fracture area is determined by establishing a correspondence between pixels and actual length dimensions through programming software, calculating the actual length dimension corresponding to each pixel, and calculating the position of the fracture area, thereby feeding back the clamping fracture position information to the force measurement mechanism;

[0027] Determination of the weight of fibers in the broken area: A model between image features and fiber weight is pre-established through programming software. The image features are then extracted from the image information and the weight of fibers in the broken area with the image features is obtained based on the statistical model.

[0028] Determination of moisture regain: A statistical model between resistance, ambient temperature and moisture regain is pre-established through programming software. Then, the moisture regain of the cotton fiber bundle to be tested with the resistance is obtained according to the statistical model using the resistance information.

[0029] Determination of breaking strength: obtaining real-time tension and displacement information of the breaking region during the stretching process through programming software, and drawing a curve of the relationship between the stretching displacement and tension of the breaking region to obtain the breaking strength of the cotton fiber;

[0030] Determination of breaking strength: A statistical model between moisture regain, weight, breaking strength and breaking strength is pre-established through programming software, and then the breaking strength of the cotton fiber bundle to be tested with the moisture regain, weight and breaking strength is obtained through the moisture regain, weight and breaking strength.

[0031] Compared with the prior art, the present invention has achieved the following technical effects:

[0032] The cotton fiber breaking strength intelligent detection system and method provided by the present invention detects the moisture regain of the cotton fiber bundle to be detected and uses the moisture regain as one of the inference conditions for the breaking strength, thereby achieving the purpose of detecting the cotton fiber breaking strength in a non-standard laboratory environment, which is of great significance for guiding cotton procurement and processing. The present invention can be applied to the fiber breaking strength detection in the cotton procurement process, providing a scientific reference for the reasonable and fair pricing of cotton processing enterprises, and greatly reducing labor intensity, eliminating the influence of subjective factors, improving detection accuracy and efficiency, and providing a batch, normalized, and standardized detection method for cotton processing enterprises to detect cotton fiber length indicators. At the same time, the detection data can be uploaded to the cloud processor in real time, eliminating interference from human factors, promoting fairness and justice in the procurement process, and the device structure is simple, with great utilization value and promotion value.

[0033] The cotton fiber breaking strength intelligent detection system and method provided by the present invention use machine vision methods to detect the weight of broken cotton fibers, and use the advantages of machine vision to identify and repair impurity areas in the image to eliminate the influence of impurities on the detection of breaking strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 A schematic diagram of the internal structure of the intelligent detection system for cotton fiber breaking strength according to an embodiment of the present invention;

[0036] Figure 2 for Figure 1 Schematic diagram of the structure of the strong force measurement mechanism;

[0037] Figure 3 for Figure 2 Schematic diagram of the principle of the strong force measurement mechanism;

[0038] Figure 4 for Figure 1 Schematic diagram of the structure of the image acquisition module;

[0039] Figure 5 for Figure 1 Schematic diagram of the structure of the resistance measurement module;

[0040] Figure 6 for Figure 1 Schematic diagram of the workflow of the detection system;

[0041] Figure 7 This is the relationship curve between tensile displacement and tensile force in the fracture area.

[0042] In the figure: 1-solenoid valve; 2-second slide module; 3-lower jaw of front clamp group; 4-upper jaw of front clamp group; 5-tension sensor connecting trapezoidal groove; 6-tension sensor connecting screw; 7-tension sensor; 8-camera; 9-camera cover; 10-suction port; 11-light source; 12-brush; 13-lofting port; 14-fiber clamping mechanism; 15-resistance measurement circuit board; 16-first slide module; 17-chassis; 18-temperature and humidity sensor; 19-waste cotton collection box; 20-clamp cylinder; 21-cotton fiber bundle to be tested; 22-upper jaw of rear clamp group; 23-servo motor; 24-lower jaw of rear clamp group; 25-camera bracket; 27-suction channel drive device; 30-SMA signal line. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] First, some technical terms involved in the embodiments of this application are introduced.

[0046] Fiber breaking strength refers to the maximum external force that a fiber can withstand under the action of continuously increasing load until it breaks, and the unit is Newton (N).

[0047] The breaking strength of cotton fiber refers to the breaking strength that each tex fiber can withstand, and the unit is centinewon / tex (cN / tex)

[0048] Cotton regain refers to the percentage of the weight of water contained in cotton to the weight of dry cotton.

[0049] The following combination Figures 1 to 7 , describing embodiments of the present invention.

[0050] Example 1

[0051] An embodiment of the present invention provides an intelligent detection system for the specific breaking strength of cotton fibers, comprising: a sampling module, an image acquisition module, a resistance measurement module, a strength measurement module, and a central control module. The sampling module is used to sample a cotton fiber sample and form cotton bundle fibers; the image acquisition module is used to obtain image information of the cotton fiber bundle 21 to be detected; the resistance measurement module is used to measure the resistance information of the cotton fiber bundle 21 to be detected; the strength measurement module is used to pull the cotton fiber bundle 21 to be detected from the broken region of the cotton fiber bundle 21 to be detected and record real-time tension information and displacement information of the broken region; the central control module is communicatively connected to the image acquisition module, the resistance measurement module, and the strength measurement module; the central control module selects the broken region of the cotton fiber bundle 21 to be detected based on the image information and determines the weight of the broken region; the central control module determines the moisture regain based on the resistance information; the central control module determines the breaking strength of the cotton fiber bundle 21 to be detected based on the tension information and displacement information; and the central control module determines the specific breaking strength based on the breaking strength, the weight of the fibers in the broken region of the cotton fiber bundle 21 to be detected, and the moisture regain of the cotton fiber bundle 21 to be detected.

[0052] First, the cotton fiber breaking strength intelligent detection system provided by the present invention detects the moisture regain of the cotton fiber bundle 21 to be detected, and uses the moisture regain as one of the inference conditions for the breaking strength, thereby achieving the purpose of detecting the cotton fiber breaking strength in a non-standard laboratory environment, which is of great significance for guiding cotton purchasing and processing. The present invention can be applied to the fiber breaking strength detection in the cotton purchasing link, providing a scientific reference for the reasonable and fair pricing of cotton processing enterprises, and greatly reducing labor intensity, eliminating the influence of subjective factors, improving detection accuracy and efficiency, and providing a batch, normalized, and standardized detection method for cotton processing enterprises to detect cotton fiber length indicators. At the same time, the detection data can be uploaded to the cloud processor in real time, eliminating interference from human factors, promoting fairness and justice in the purchasing link, and the device structure is simple, energy consumption is low, and it has great utilization value and promotion value.

[0053] Second, the cotton fiber breaking strength intelligent detection system provided by the present invention uses machine vision methods to detect the weight of broken cotton fibers, and uses the advantages of machine vision to identify and repair impurity areas in the image to eliminate the impact of impurities on the detection of breaking strength.

[0054] In some embodiments, the intelligent detection system for cotton fiber breaking strength ratio further includes a chassis 17, in which a sampling module, an image acquisition module, a resistance measurement module, and a strength measurement module are arranged. A sampling port 13 and an observation window are provided on the chassis 17. The staff places the cotton fiber sample from the sampling port 13 on or on one side of the sampling module to facilitate sampling by the sampling module.

[0055] In some embodiments, the chassis 17 is connected to an external display, which is connected to the central control module. The display is used to display some intermediate information and the final result (ie, the breaking strength ratio) during the detection process.

[0056] In some embodiments, the present invention further includes a temperature and humidity sensor 18, which is used to detect ambient temperature and humidity. The central control module determines the moisture regain based on the resistance information and temperature and humidity information of the cotton fiber bundle 21 to be detected.

[0057] This embodiment uses temperature and humidity information as one of the conditions for determining the moisture regain, thereby improving the accuracy of the moisture regain.

[0058] In some embodiments, the embodiments of the present invention further include a cotton fiber brush module, which is used to brush off free fibers on the surface of the cotton fiber bundle 21 to be detected and straighten the cotton fiber bundle 21 to be detected before image acquisition, resistance measurement and strength measurement.

[0059] This embodiment facilitates the image acquisition module to acquire clear image information.

[0060] The sampling module and cotton fiber brushing module in the present invention both utilize existing solutions, and the present invention does not improve upon these solutions. Specifically, the sampling module primarily comprises two sets of sampling rollers. The cotton fiber brushing module is used to straighten the sample cotton fibers and remove loose cotton fibers. Its structure primarily comprises a brushing support, on which is mounted a sample placement platform and an industrial brush 12.

[0061] In some embodiments, the sampling module and cotton fiber brush sample module in the present invention may adopt the sampling module and cotton fiber brush sample module in the patent application "CN114877810B-Cotton fiber length detection device and application method based on machine vision".

[0062] In some embodiments, the embodiments of the present invention also include a fiber clamping mechanism 14 and a first slide module 16. The fiber clamping mechanism 14 is used to clamp the cotton fiber bundle 21 to be detected obtained by sampling the sampling module. The fiber clamping mechanism 14 is arranged on the first slide module 16. The sampling module, image acquisition module, resistance measurement module and strength measurement module are arranged on the same side of the first slide module 16. The first slide module 16 can drive the fiber clamping mechanism 14 to move and transfer the cotton fiber bundle 21 to be detected to the image acquisition station of the image acquisition module, the resistance measurement station of the resistance measurement module and the strength measurement station of the strength measurement module.

[0063] In the embodiment of the present invention, the position of the cotton fiber bundle 21 to be detected is switched by the first slide module 16 and the fiber clamping mechanism 14 to facilitate automatic image acquisition, resistance measurement, and strength measurement.

[0064] In this embodiment, the sampling module has two sets of sampling rollers. The sampling rollers rotate during the sampling process and cooperate with the fiber clamping mechanism 14 to obtain the cotton fiber bundle 21 to be tested.

[0065] After preparing the cotton fiber bundle 21 to be tested, the first slide module 16 drives the fiber clamping mechanism 14 to clamp the cotton fiber bundle 21 to be tested and move it to the brush 12 of the cotton fiber brush sample module. The brush 12 is driven by the motor to rotate, brushing away the fibers that are not completely clamped (i.e., free fibers), completing the pretreatment of the cotton fiber bundle 21 to be tested, and brushing the cotton fiber bundle 21 to be tested straight under appropriate pressure from the brush 12.

[0066] In some embodiments, the image acquisition module includes a light source 11, a fan, a suction channel, a suction channel drive device 27, and a camera 8. The suction channel is connected to the air inlet of the fan, and one end of the suction channel is a suction port 10. At least the upper and lower portions of the suction channel are constructed of transparent material. The camera 8 is located directly above the suction channel, and the light source 11 is located directly below the suction channel. The suction port 10 is used to generate negative pressure to straighten the cotton fiber bundle 21 to be detected. The suction channel drive device 27 can drive the suction port 10 to move closer to and away from the cotton fiber bundle 21 to be detected. The camera 8 is preferably a CCD camera. The suction channel drive device 27 is a cylinder.

[0067] The suction channel and fan in this embodiment cooperate to further straighten the cotton fiber bundle 21 to be inspected. During operation, the suction channel draws in the cotton fiber bundle 21 to be inspected and straightens the fibers. Light emitted by the light source 11 passes through the cotton fiber bundle 21 to be inspected and is received by the camera 8, forming an image of the cotton fiber bundle 21 to be inspected, thereby completing image acquisition of the cotton fiber bundle 21 to be inspected.

[0068] Specifically, the camera 8 is supported by a camera bracket 25, and the camera bracket 25 can adjust the height of the camera 8. The air suction channel driving device 27 is a pneumatic push rod, which pushes the air suction channel to move back and forth.

[0069] In some embodiments, the strength measurement module includes a front clamp group, a rear clamp group, a tension sensor 7 and a clamp cylinder 20. The front clamp group and the rear clamp group are used to clamp both sides of the length direction of the fracture area. The rear clamp group is connected to the tension sensor 7. Specifically, one end of the tension sensor 7 is connected to the rear clamp group through the tension sensor connecting trapezoidal groove 5 and the tension sensor connecting screw 6. The tension sensor 7 is connected to the clamp cylinder 20. The clamp cylinder 20 can drive the tension sensor 7 to drive the rear clamp group to move away from the front clamp group. The servo motor 23 of the tension sensor 7 and the clamp cylinder 20 is communicated with the central control module, and the central control module calculates the displacement information based on the pulse signal of the servo motor 23.

[0070] This embodiment provides a solution for breaking the cotton fiber bundle 21 to be detected.

[0071] Specifically, the front clamp group and the rear clamp group are composed of upper jaw clamp and lower jaw clamp, that is, Figure 2The front clamp group comprises a lower jaw clamp 3, an upper jaw clamp 4, an upper jaw clamp 22 and a lower jaw clamp 24 of the rear clamp group. The lower jaw clamp is driven by the clamp cylinder 20 to move up and down, and the rear clamp group can move in the direction away from and close to the front clamp group. When it moves away from the front clamp group, it can stretch the cotton fiber bundle 21 to be tested. Before the next stretching, the rear clamp group moves in the direction close to the front clamp group to return to its original position. It can be understood that after the cotton fiber bundle 21 to be tested is broken, the lower jaw clamp is driven by the cylinder to move downward, releases the broken cotton fiber bundle 21 to be tested, and then is sucked away by the waste cotton recovery device configured in the chassis 17 using the principle of negative pressure suction, so as to facilitate the cleaning of the strength measurement module, and then facilitate the strength measurement module to perform the next stretching process. The waste cotton recovery device will eventually recycle the discarded cotton fibers into the waste cotton collection box 19.

[0072] In some embodiments, the bottom surface of the upper jaw pliers is configured with a slot, and the top surface of the lower jaw pliers is configured with a protrusion. The lower jaw pliers moves upward and is inserted into the slot to press, fix or clamp the cotton fiber bundle 21 to be detected. In some examples, a polyurethane material is embedded in the slot of the upper jaw pliers, which has a certain hardness and can prevent the cotton fiber bundle 21 to be detected from being pinched off when the cotton fiber bundle 21 to be detected is clamped.

[0073] In some embodiments, the force measurement station and the resistance measurement station are located at the same position, the resistance measurement module includes a resistance measurement circuit board 15 and an SMA signal line 30, the fiber clamping mechanism 14 is connected to the resistance measurement circuit board 15 through the SMA signal line 30, and the front clamping group is connected to the resistance measurement circuit board 15 through the SMA signal line 30.

[0074] This embodiment utilizes the fiber clamping mechanism 14 and the front clamping group as electrodes for resistance measurement, and does not require additional electrodes, thereby simplifying the structure and saving costs.

[0075] When this embodiment is used, resistance measurement is performed first, followed by force measurement. Specifically, after the cotton fiber bundle 21 to be tested passes through the image acquisition module, it moves to the force measurement station or the resistance measurement station. Driven by the second slide module 2, the force measurement module moves to the corresponding position, clamps the cotton fiber bundle 21 to be tested, and uses the resistance measurement circuit board 15 to complete the collection of fiber resistance information. After the resistance information collection is completed, the force measurement module is activated to break the cotton fiber bundle 21 to be tested and record the tension information and displacement information.

[0076] In some embodiments, the force measurement module is disposed on the second slide module 2 , and the second slide module 2 can drive the force measurement module to move along the length direction of the cotton fiber bundle 21 to be detected at the force measurement station.

[0077] This embodiment can control the second slide module 2 to drive the force measurement module to move according to the position of the fracture area, thereby improving the adaptability of the device.

[0078] During the detection process of the present invention, the power source of the cylinder is provided by the air pump, and the operation of each cylinder is controlled by the solenoid valve 1. During the detection, the detection personnel only need to put the cotton sample into the sampling module and press the start button. Under the control of the central control module, a detection can be completed within 1 minute.

[0079] The sampling module, image acquisition module, resistance measurement module, strength measurement module, first slide module 16, fiber clamping mechanism 14, second slide module 2 and cotton fiber brush sample module in the present invention are uniformly controlled by the central control module, and the various components cooperate with each other, so that in the process of cotton fiber breaking strength detection, the problems of low automation level of cotton fiber breaking strength detection, cumbersome detection process, high labor intensity, large influence of human factors, and difficulty in meeting the actual needs of cotton production are solved. The detection system of the present application can realize automatic and rapid detection of cotton fiber breaking strength.

[0080] Example 2

[0081] The embodiment of the present invention further provides an intelligent detection method for cotton fiber breaking strength, comprising:

[0082] Obtaining a cotton fiber bundle to be tested 21;

[0083] Acquire image information of the cotton fiber bundle 21 to be detected;

[0084] Obtaining resistance information and ambient temperature information of the cotton fiber bundle 21 to be detected;

[0085] Breaking the cotton fiber bundle 21 to be tested from the fracture area of ​​the cotton fiber bundle 21 to be tested and obtaining the real-time tension;

[0086] The broken area and position of the broken area, and the weight of the fibers in the broken area of ​​the cotton fiber bundle 21 to be detected are determined based on the image information; the moisture regain is determined based on the resistance information and the ambient temperature information; the breaking strength is determined based on the tensile force information; and the breaking strength ratio is predicted based on the breaking strength, the weight of the fibers in the broken area, and the moisture regain.

[0087] The present invention has the following two effects.

[0088] First, the present invention provides an intelligent method for detecting the specific breaking strength of cotton fibers by testing the moisture regain of the cotton fiber bundle 21 to be tested and using the moisture regain as one of the calculation criteria for the specific breaking strength. This method achieves the purpose of detecting the specific breaking strength of cotton fibers in a non-standard laboratory environment, which is of great significance for guiding cotton procurement and processing. The present invention can be applied to the detection of specific breaking strength of fibers in the cotton procurement process, providing a scientific reference for reasonable and fair pricing by cotton processing companies. It also significantly reduces labor intensity, eliminates the influence of subjective factors, improves detection accuracy and efficiency, and provides a batch-based, standardized, and standardized detection method for cotton processing companies to detect cotton fiber length indicators.

[0089] Second, the intelligent detection method for the breaking strength of cotton fibers provided by the present invention uses machine vision to detect the weight of broken cotton fibers, and uses the advantages of machine vision to identify and repair the impurity areas of the image to eliminate the influence of impurities on the detection of the breaking strength.

[0090] In some embodiments, the position of the fracture area is determined by: establishing a corresponding relationship between pixels and actual length dimensions through programming software, calculating the actual length dimension corresponding to each pixel, and calculating the position of the fracture area, thereby feeding back the clamping fracture position information to the force measurement mechanism.

[0091] Determination of the weight of fibers in the broken area: A statistical model between image features and fiber weight is pre-established through programming software, and then the image features in the image information are extracted and the weight of fibers in the broken area having the image features is obtained based on the statistical model; the image features can be grayscale features, etc.

[0092] Determination of moisture regain: A statistical model between resistance, ambient temperature and moisture regain is pre-established by programming software, and then the moisture regain of the cotton fiber bundle 21 to be tested with the resistance is obtained according to the statistical model based on the resistance information and ambient temperature information;

[0093] Determination of breaking strength: The real-time tension and displacement information of the breaking area during the stretching process is obtained through programming software, and a curve diagram of the relationship between the tensile displacement and tension of the breaking area is drawn to obtain the breaking strength of the cotton fiber.

[0094] Determination of breaking strength: A statistical model between moisture regain, weight, breaking strength and breaking strength is pre-established through programming software, and then the breaking strength of the cotton fiber bundle 21 to be tested with the moisture regain, weight and breaking strength is obtained through the moisture regain, weight and breaking strength.

[0095] In some examples, ambient humidity can also be used as one of the conditions for moisture regain detection. Specifically, in the moisture regain determination step, it is necessary to pre-establish a statistical model between resistance, temperature, and moisture regain using programming software. Then, the resistance information, ambient humidity information, and ambient temperature information are used to obtain the moisture regain of the cotton fiber bundle 21 to be detected with the specified resistance based on the statistical model. This embodiment further improves the accuracy of the results.

[0096] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. An intelligent detection system for cotton fiber breaking strength, characterized by: include: A sampling module is used to sample the cotton fiber sample and construct the sample into a cotton fiber bundle to be tested; An image acquisition module, used for acquiring image information of the cotton fiber bundle to be detected; a resistance measuring module, used for measuring the resistance information of the cotton fiber bundle to be detected; A strength measurement module, configured to break the cotton fiber bundle to be tested from the breaking region of the cotton fiber bundle to be tested, and record real-time tension information and displacement information of the breaking region; a central control module, communicatively connected to the image acquisition module, the resistance measurement module, and the strength measurement module; the central control module selects the broken area of ​​the cotton fiber bundle to be detected based on the image information and determines the weight of the broken area; the central control module determines the moisture regain based on the resistance information; and the central control module determines the breaking strength of the cotton fiber bundle to be detected based on the tension information and the displacement information; The central control module determines the breaking strength according to the breaking strength, the weight of the fibers in the broken area of ​​the cotton fiber bundle to be detected, and the moisture regain of the cotton fiber bundle to be detected.

2. The cotton fiber breaking strength intelligent detection system according to claim 1, characterized in that: It also includes a temperature and humidity sensor, which is used to detect the ambient temperature and humidity. The central control module determines the moisture regain based on the resistance information and temperature and humidity information of the cotton fiber bundle to be detected.

3. The intelligent detection system for cotton fiber breaking strength according to claim 1, characterized in that: It also includes a cotton fiber brush module, which is used to brush off the free fibers on the surface of the cotton fiber bundle to be detected and straighten the cotton fiber bundle to be detected before image acquisition, resistance measurement and strength measurement.

4. The cotton fiber breaking strength intelligent detection system according to claim 1, characterized in that: It also includes a fiber clamping mechanism and a first slide module, the fiber clamping mechanism is used to clamp the cotton fiber bundle to be detected sampled by the sampling module, the fiber clamping mechanism is arranged on the first slide module, the sampling module, the image acquisition module, the resistance measurement module and the strength measurement module are arranged on the same side of the first slide module, and the first slide module can drive the fiber clamping mechanism to move and transfer the cotton fiber bundle to be detected to the image acquisition station of the image acquisition module, the resistance measurement station of the resistance measurement module and the strength measurement station of the strength measurement module.

5. The cotton fiber breaking strength intelligent detection system according to claim 4, characterized in that: The image acquisition module includes a light source, a fan, a suction channel, a suction channel driving device and a camera. The suction channel is connected to the air inlet of the fan. One end of the suction channel is a suction port. At least the upper and lower parts of the suction channel are constructed of transparent materials. The camera is located directly above the suction channel. The light source is located directly below the suction channel. The suction port is used to generate negative pressure to straighten the cotton fiber bundle to be detected. The suction channel driving device can drive the suction port to approach and away from the cotton fiber bundle to be detected.

6. The intelligent detection system for cotton fiber breaking strength according to claim 5, characterized in that: The force measurement module includes a front clamp group, a rear clamp group, a tension sensor and a clamp cylinder. The front clamp group and the rear clamp group are used to clamp both sides of the length direction of the fracture area. The rear clamp group is connected to the tension sensor, and the tension sensor is connected to the clamp cylinder. The clamp cylinder can drive the tension sensor to drive the rear clamp group to move away from the front clamp group. The servo motor of the tension sensor and the clamp cylinder is communicated with the central control module, and the central control module calculates the displacement information based on the pulse signal of the servo motor.

7. The cotton fiber breaking strength intelligent detection system according to claim 6, characterized in that: The force measurement station and the resistance measurement station are located at the same position. The resistance measurement module includes a resistance measurement circuit board and an SMA signal line. The fiber clamping mechanism is connected to the resistance measurement circuit board via the SMA signal line. The front clamping group is connected to the resistance measurement circuit board via the SMA signal line.

8. The intelligent detection system for cotton fiber breaking strength according to claim 6, characterized in that: The force measurement module is arranged on the second slide module, and the second slide module can drive the force measurement module to move along the length direction of the cotton fiber bundle to be detected at the force measurement station.

9. An intelligent detection method for cotton fiber breaking strength, characterized by: include: Obtaining a cotton fiber bundle to be tested; Acquire image information of the cotton fiber bundle to be detected; Obtaining resistance information of the cotton fiber bundle to be tested and ambient temperature information; Breaking the cotton fiber bundle to be tested from the fracture area of ​​the cotton fiber bundle to be tested and obtaining the real-time tension; The broken area of ​​the cotton fiber bundle to be detected, the position of the broken area, and the weight of the fibers in the broken area are determined based on the image information; the moisture regain is determined based on the resistance information and the ambient temperature information; the breaking strength is determined based on the tensile force information; and the breaking strength ratio is predicted based on the breaking strength, the weight of the fibers in the broken area, and the moisture regain.

10. The intelligent detection method for cotton fiber breaking strength according to claim 9, characterized in that: Determination of the fracture area position: The corresponding relationship between pixels and actual length dimensions is established through programming software, the actual length dimension corresponding to each pixel is calculated, and the fracture area position is calculated, thereby feeding back the clamping fracture area position information to the force measurement mechanism; Determination of the weight of fibers in the broken area: A statistical model between image features and fiber weight is pre-established through programming software. The image features are then extracted from the image information and the weight of fibers in the broken area with the image features is obtained based on the statistical model. Determination of moisture regain: A statistical model between resistance, ambient temperature and moisture regain is pre-established through programming software. Then, the moisture regain of the cotton fiber bundle to be tested with the resistance is obtained according to the statistical model based on the resistance information and ambient temperature information. Determination of breaking strength: obtaining real-time tension and displacement information of the breaking region during the stretching process through programming software, and drawing a curve of the relationship between the stretching displacement and tension of the breaking region to obtain the breaking strength of the cotton fiber; Determination of breaking strength: A statistical model between moisture regain, weight, breaking strength and breaking strength is pre-established through programming software, and then the breaking strength of the cotton fiber bundle to be tested with the moisture regain, weight and breaking strength is obtained through the moisture regain, weight and breaking strength.

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