CN-121979155-A - Plant fiber flexible dissociation and high-valued intelligent production system and method

CN121979155ACN 121979155 ACN121979155 ACN 121979155ACN-121979155-A

Abstract

The invention relates to the technical field of fiber material processing, and discloses a plant fiber flexible dissociation and high-value intelligent production system and method, wherein the system comprises; the collaborative preprocessing module calculates a medicament concentration compensation value based on a raw material component fingerprint and a reaction product release rate, performs characteristic feedforward control, the signal sensing module acquires multisource physical field signals such as stator current, mechanical vibration and the like, the operation control module receives the signals and performs a carrier frequency shift and angular domain resampling double noise suppression strategy, residual signals representing the rheological state of materials are separated, further, characteristics of raw material rigidity and toughness modulus are calculated in a decoupling mode, a variable impedance control model constructed based on the characteristics generates equivalent rigidity and damping coefficient instructions in real time, and the double-path dissociation module is driven to adaptively switch between a rigid positioning mode and a flexible floating mode. The invention effectively solves the problem of fiber damage caused by raw material heterogeneity, and improves the production efficiency and the fiber quality.

Inventors

ZHU FU
ZHANG CHANGPING
ZHANG WEN

Assignees

山东禾名生物科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260206

Claims (10)

1. The utility model provides a plant fiber flexible dissociation and high value intelligence production system which characterized in that includes: the collaborative pretreatment module is used for acquiring fingerprint data of raw material components and product release rate data in the enzymolysis reaction process, calculating a medicament concentration compensation value of a chemical treatment process based on the fingerprint data of the raw material components and the product release rate data, and executing characteristic feedforward control; The double-path dissociation module comprises a variable frequency driving unit for adjusting the rotation movement of the dissociation rotor and a hydraulic servo unit for adjusting the axial feeding movement of the dissociation cavity, and is used for receiving a control instruction to drive the physical execution mechanism to switch between a rigid positioning mode and a flexible floating mode; The signal sensing module is used for collecting physical field signals reflecting the running state of the system and the rheological behavior of the material, and the physical field signals at least comprise stator current of a driving motor, mechanical vibration of a dissociation cavity and angular position signals of a dissociation rotor; The operation control module is used for receiving the physical field signals, executing a double noise suppression strategy to separate residual signals representing the rheological state of the raw materials, carrying out characteristic decoupling analysis on the residual signals, calculating rigidity modulus characteristics representing the hard brittleness of the raw materials and toughness modulus characteristics representing the toughness of the raw materials, further constructing a variable impedance control model, generating a composite control instruction containing an equivalent rigidity coefficient and an equivalent damping coefficient in real time, and sending the composite control instruction to the double-path dissociation module.
2. The plant fiber flexible dissociation and high-value intelligent production system according to claim 1, wherein the collaborative pretreatment module comprises a spectrum analysis unit, a biological enzymolysis reaction unit and a chemical dissociation reaction unit which are sequentially arranged along the material flow direction, wherein the collaborative pretreatment module is configured to determine a target set concentration of chemical agents of the chemical dissociation reaction unit, the target set concentration is determined by subtracting a compensation gain term from a reference concentration term, the reference concentration term is a product of a raw material type correction coefficient and a reference concentration constant of a process design, and the compensation gain term is a product of a biochemical reaction efficiency compensation gain coefficient and a time integral value of a reducing sugar release rate.
3. The plant fiber flexible dissociation and high-value intelligent production system according to claim 1 is characterized in that a hydraulic servo unit in the double-path dissociation module adopts a variable structure execution mechanism based on a variable impedance model, the hydraulic servo unit outputs an axial acting force according to an equivalent stiffness coefficient and an equivalent damping coefficient issued by the operation control module, the axial acting force is formed by superposition of a reference force bias, a position adjustment item and a speed adjustment item, wherein the position adjustment item is the product of the equivalent stiffness coefficient and the clearance position deviation of a grinding disc, and the speed adjustment item is the product of the equivalent damping coefficient and the clearance speed deviation of the grinding disc.
4. The plant fiber flexible dissociation and high-value intelligent production system of claim 1, in which the signal sensing module comprises an electrical acquisition unit, a vibration acquisition unit and an angle acquisition unit; The electric acquisition unit comprises a high-frequency current transformer arranged at the output end of the variable-frequency driving unit, and the bandwidth upper limit cutoff frequency of the high-frequency current transformer is set to be not lower than 3 times of the carrier frequency of the variable-frequency driving unit; The vibration acquisition unit comprises a piezoelectric acceleration sensor arranged on the dissociation cavity, the angle acquisition unit comprises a rotary encoder arranged on the dissociation rotor spindle, and the pulse number per rotation of the rotary encoder is set according to an angular domain sampling theorem and is used as a signal reference for executing angular domain resampling by the operation control module.
5. The plant fiber flexible dissociation and high-value intelligent production system according to claim 1, wherein the dual noise suppression strategy operated by the operation control module comprises electric carrier active cleaning logic, the operation control module monitors the carrier frequency of the variable frequency driving unit and the mechanical characteristic frequency of the mechanical structure in real time, when the carrier frequency falls within the sideband protection range of the mechanical characteristic frequency, an adjusted carrier frequency set value is calculated and sent to the dual dissociation module, the carrier frequency set value is set to be the sum of an original carrier frequency and a frequency shift compensation amount, the frequency shift compensation amount is determined by multiplying a direction sign function after the superposition of a frequency domain protection bandwidth and a safety margin frequency, and the direction sign function depends on the difference between the original carrier frequency and the mechanical characteristic frequency to be positive or negative.
6. The plant fiber flexible dissociation and high-value intelligent production system of claim 1, wherein the dual noise suppression strategy operated by the operation control module further comprises angular domain signal reconstruction logic and mechanical background difference logic, the operation control module resamples the mechanical vibration signal into an angular domain stationary signal by using the dissociation rotor angular position signal, and constructs a mechanical background baseline by using a synchronous average algorithm, and the rheological residual signal is separated by subtracting the angular domain stationary signal from the mechanical background baseline.
7. The plant fiber flexible dissociation and high-value intelligent production system of claim 6, wherein the operation control module is used for calculating the stiffness modulus characteristic in the following calculation manner: and integrating the power spectral density of the rheological residual signal in a preset high-frequency characteristic frequency band, and dividing the integration result by a normalized reference energy constant.
8. The intelligent production system for flexible dissociation and high-valued plant fibers according to claim 6, wherein the operation control module is configured to calculate the modulus of toughness characteristic in the following manner: and calculating the ratio of the sum of the current amplitudes at the characteristic sideband frequency to the current amplitude at the fundamental frequency by adopting a sideband energy ratio method based on the stator current signal.
9. A plant fiber flexible dissociation and high-valued intelligent production system as claimed in claim 3, wherein said operation control module calculates said equivalent stiffness coefficient and said equivalent damping coefficient in real time according to said stiffness modulus characteristic and said toughness modulus characteristic; The equivalent stiffness coefficient is set to be the sum of basic stiffness and a stiffness increment term, the stiffness increment term is in direct proportion to the part of the stiffness modulus characteristic exceeding the stiffness characteristic triggering threshold, the equivalent damping coefficient is set to be the difference between a nominal damping coefficient and a damping reduction term, and the damping reduction term is in direct proportion to the toughness modulus characteristic.
10. A plant fiber flexible dissociation and high-valued intelligent production method applied to the plant fiber flexible dissociation and high-valued intelligent production system as claimed in any one of claims 1-9, which is characterized by comprising the following steps: Acquiring raw material spectrum data by utilizing a near infrared spectrum to calculate a type correction factor, monitoring the release rate of reducing sugar in the enzymolysis reaction process in real time, and dynamically calculating and adjusting the concentration of the chemical agent in the subsequent chemical treatment process based on the integral deviation of the type correction factor and the release rate; synchronously collecting stator current of a driving motor, mechanical vibration of a dissociation cavity and rotor angle position signals through a current transformer, an acceleration sensor and a rotary encoder; In the acquisition process, judging whether the carrier frequency of the frequency converter covers a characteristic frequency band, if so, executing carrier active frequency shift, and simultaneously carrying out angular domain resampling and synchronous average difference on the mechanical vibration signal by utilizing the rotor angular position signal, eliminating deterministic mechanical background noise and acquiring a rheological residual signal; performing high-frequency energy integration on the rheological residual signal to calculate a stiffness modulus characteristic representing the microhardness of the raw material, and performing sideband analysis on the stator current signal to calculate a toughness modulus characteristic representing the entanglement degree of the raw material; Substituting the rigidity modulus characteristic and the toughness modulus characteristic into a variable impedance control model, calculating an equivalent rigidity coefficient and an equivalent damping coefficient required by a system in real time, and generating a pressure and position compound instruction to drive a hydraulic servo mechanism according to the equivalent rigidity coefficient and the equivalent damping coefficient, so that the physical properties of the dissociation process are adaptively switched between rigid crushing and flexible kneading.

Description

Plant fiber flexible dissociation and high-valued intelligent production system and method Technical Field The invention relates to the technical field of fiber material processing, in particular to a plant fiber flexible dissociation and high-value intelligent production system and method. Background The high value utilization of plant fibers relies on an efficient dissociation process, i.e., the mechanical action that separates the plant material into individual fibers and causes them to fibrillate, exposing more active hydroxyl groups. At present, mechanical equipment such as a disc grinder and the like is mainly adopted in industrial production, and shearing, extrusion and friction force are generated by a high-speed rotating millstone to act on fiber raw materials so as to change the morphological structure of the fiber raw materials. The plant raw material is derived from the nature and has obvious biological heterogeneity. The lignin content, hardness, toughness and fiber length-diameter ratio of the raw materials in different production places, different batches and even the same batch have dynamic differences. Most existing dissociation devices employ a constant gap, constant power or simple constant specific energy consumption control mode. Such rigid control logic is difficult to accommodate for real-time fluctuations in feedstock characteristics. In actual production, when the hardness of the raw materials is high or the feeding is uneven, the mechanical gap which is set rigidly often causes excessive shearing force to be applied to the fibers by the grinding teeth, so that the fibers are directly cut off instead of the expected kneading and yarn-separating effect. Unexpected decreases in the average length of the fibers can severely lose the physical strength of the final formed material. Conversely, when the material is softer or more ductile, the force of immobilization may be insufficient to disrupt the cell wall structure, resulting in insufficient dissociation and increased energy efficiency. In order to optimize the dissociation effect, some prior art attempts have been made to introduce automatic control systems. However, the dissociation device is accompanied by high-intensity mechanical background vibration during operation, and the high-power variable-frequency driving device can introduce complex electromagnetic interference. The weak physical field signals generated by the rheological behavior of the fiber material in the disc gap tend to be submerged in the inherent structural vibrations and high frequency carrier noise of the device. The existing signal monitoring means mainly pay attention to macroscopic current or total vibration amplitude, and is difficult to effectively separate out characteristic signals which truly represent the microscopic rheological state of materials in a strong noise environment. The lack of process feedback data with high signal-to-noise ratio makes the control system unable to sense the real-time state of the fiber, and it is difficult to realize fine flexible regulation and control for fiber protection. In addition, the existing production line generally manages the chemical pretreatment and the subsequent mechanical dissociation of the precursor as independent processes, lacks cross-process cooperative linkage based on raw material characteristics, and is difficult to further reduce comprehensive energy consumption on the premise of ensuring the morphological integrity of the fiber. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a plant fiber flexible dissociation and high-valued intelligent production system and method, which solve the technical problems that the prior dissociation equipment is difficult to sense the real-time rheological state of materials due to the interference of strong background noise, so that constant control parameters cannot adapt to the biological heterogeneity of raw materials, and further the fiber damage is serious and the dissociation efficiency is low. In order to achieve the purpose, the invention is realized by the following technical scheme that the plant fiber flexible dissociation and high-valued intelligent production system comprises; the collaborative pretreatment module is used for acquiring fingerprint data of raw material components and product release rate data in the enzymolysis reaction process, calculating a medicament concentration compensation value of a chemical treatment process based on the fingerprint data of the raw material components and the product release rate data, and executing characteristic feedforward control; The double-path dissociation module comprises a variable frequency driving unit for adjusting the rotation movement of the dissociation rotor and a hydraulic servo unit for adjusting the axial feeding movement of the dissociation cavity, and is used for receiving a control instruction to drive the physical execution mechanism to switch betwe