A pyrotechnic agent weighing device using variable runner micro-vibration precision feeding

Abstract

The application discloses a pyrotechnic agent weighing device adopting variable runner micro-vibration precise feeding, and relates to the technical field of high-precision material metering. The device comprises a feeding mechanism, a weighing mechanism and a control system. The feeding mechanism comprises at least one runner unit, the runner unit comprises a flexible base, a vibration mechanism and a deformation driving assembly, the top of the flexible base is provided with a material runner, the vibration mechanism and the deformation driving assembly are arranged on the bottom surface of the flexible base, and are respectively used for driving micro-vibration and adjusting the bending degree, changing the cross-sectional shape and size of the material runner, the weighing mechanism is connected with the outlet of the material runner, and the control system can dynamically adjust the vibration frequency, the vibration amplitude of the vibration mechanism and the driving parameters of the deformation driving assembly according to real-time weighing data. When the weight of the material approaches the target value, the vibration intensity is reduced, the feeding speed is reduced, the bending degree of the flexible base is changed, the cross-sectional size of the material runner is reduced, and the falling amount of the material is reduced. The application can actively adapt to the material characteristics, prevent residue and improve the weighing precision.

Description

Technical Field

[0001] This invention relates to the field of high-precision material metering technology, and in particular to a pyrotechnic agent weighing device that employs variable flow channel micro-vibration precision feeding. Background Technology

[0002] Precise metering of pyrotechnic agents is crucial for ensuring the performance and safety of pyrotechnic products. In existing technologies, vibratory feeding is a common precision feeding method. For example, Chinese patent CN118583263A discloses a device using dual vibratory grooves (a first linear vibratory groove and a second linear vibratory groove) for coarse and fine feeding, improving final accuracy by switching the operating states of different vibratory grooves. However, this technology has several significant limitations: Fixed flow channel, poor adaptability: Its flow channel (straight vibrating channel) is a rigid and fixed structure. When faced with pyrotechnic agents with different flowability and particle characteristics, a single fixed flow channel is difficult to achieve the best conveying efficiency and accuracy. Different pyrotechnic agents have different requirements for the flow channel due to differences in particle size, shape, surface properties, etc., and a fixed flow channel cannot meet these diverse needs.

[0003] Residues are easily formed, introducing errors: During repeated use, the fixed flow channel is prone to the adhesion and residue of pyrotechnic agents. These residues may irregularly detach during subsequent weighings, thus introducing errors into the weighing results and affecting the accuracy of pyrotechnic agent measurement.

[0004] Limited control dimensions: Its control methods are limited to the "start / stop" and "amplitude" adjustment of the vibrator, which is insufficient for dynamic optimization of the feeding process. In the actual feeding process, the material characteristics may change slightly or be affected by external environmental factors. It is difficult to achieve precise adjustment of the feeding process through simple vibration control alone.

[0005] Therefore, it is urgent to develop a precision weighing device that can actively adapt to material characteristics, effectively prevent residues, and achieve higher-dimensional intelligent control. Summary of the Invention

[0006] The purpose of this invention is to provide a pyrotechnic agent weighing device that uses variable flow channel micro-vibration precision feeding to solve the problems existing in the prior art. It can actively adapt to the material characteristics, effectively prevent residues, and effectively improve the weighing accuracy.

[0007] To achieve the above objectives, the present invention provides the following solution: This invention provides a pyrotechnic agent weighing device employing variable flow channel micro-vibration precision feeding, comprising: a feeding mechanism, a weighing mechanism, and a control system. The feeding mechanism includes at least one flow channel unit, which includes a flexible substrate, a vibration mechanism, and a deformation driving component. A material flow channel is formed on the top of the flexible substrate. The vibration mechanism is disposed on the bottom surface of the flexible substrate to drive the flexible substrate to generate micro-vibrations. The deformation driving component is disposed on the bottom surface of the flexible substrate to adjust the curvature of the flexible substrate, thereby changing the cross-sectional shape and size of the material flow channel. The weighing mechanism is connected to the material flow channel. The outlet of the channel is used to place medicine cups; the control system is signal-connected to the weighing mechanism, the vibration mechanism, and the deformation drive component. The control system can dynamically adjust the vibration frequency and amplitude of the vibration mechanism and the drive parameters of the deformation drive component based on the real-time weighing data fed back by the weighing mechanism. When the weighing mechanism detects that the material weight is close to the target value, the control system can reduce the vibration intensity of the vibration mechanism and reduce the material feeding speed. At the same time, the deformation drive component changes the bending degree of the flexible substrate and reduces the cross-sectional size of the material flow channel to reduce the amount of material falling.

[0008] Preferably, the deformation driving assembly includes multiple independent actuation units arranged at intervals along the material flow channel, and the control system is capable of independently controlling the operating state of each actuation unit to generate local deformation at different locations on the flexible substrate.

[0009] Preferably, the actuation unit is a piezoelectric ceramic sheet or a piezoelectric fiber.

[0010] Preferably, at least a portion of the wall surface of the material flow channel is covered with a flexible electrode layer, the control system is electrically connected to the flexible electrode layer, and applies a controllable voltage to the flexible electrode layer to adjust the electrostatic adsorption force of the material flow channel wall surface.

[0011] Preferably, it also includes a cleaning mechanism, which is disposed at the end region of the material flow channel and includes an inert gas nozzle and a negative pressure suction nozzle that cooperates with the inert gas nozzle; the control system controls the cleaning mechanism to start during the working interval to blow and adsorb and clean the end of the material flow channel.

[0012] Preferably, the weighing mechanism includes a high-precision weighing sensor.

[0013] Preferably, the weighing mechanism further includes an automatic calibration device, which is signal-connected to the control system, and the control system can automatically start the automatic calibration device for online calibration when the device is started, after a preset number of working cycles, or when environmental parameters change beyond a threshold.

[0014] Preferably, the automatic calibration device includes a movable miniature standard weight and a driving component that drives the miniature standard weight to be loaded onto or removed from the weighing sensor, the driving component being signal-connected to the control system.

[0015] Preferably, it further includes an explosion-proof housing, the feeding mechanism is located inside the explosion-proof housing, and the outlet of the material flow channel extends through the wall of the explosion-proof housing to the outside and connects with the weighing mechanism.

[0016] Preferably, it also includes a feeding mechanism, which is disposed above the starting end of the feeding mechanism and is used to feed pyrotechnic agents into the material flow channel.

[0017] The present invention achieves the following technical effects compared to the prior art: This invention provides a pyrotechnic agent weighing device employing variable flow channel micro-vibration precision feeding. By incorporating a flexible substrate, a vibration mechanism, and a deformation drive component, the device achieves adjustable cross-sectional shape and size of the material flow channel and micro-vibration drive. This allows the feeding process to be flexibly adjusted based on real-time weighing data, improving feeding accuracy and meeting the weighing requirements of high-precision materials such as pyrotechnic agents. This dynamic adjustment mechanism effectively avoids weighing errors caused by excessive or excessively rapid feeding, ensuring that each weighing accurately approaches the target value. Attached Figure Description

[0018] 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.

[0019] Figure 1 A schematic diagram of the structure of the pyrotechnic agent weighing device with variable flow channel micro-vibration precision feeding provided by the present invention; Figure 2 A schematic diagram of the internal structure of the pyrotechnic agent weighing device with variable flow channel micro-vibration precision feeding provided by the present invention. Figure 3 A front view of the internal structure of the pyrotechnic agent weighing device with variable flow channel micro-vibration precision feeding provided by the present invention. In the diagram: 1. Feeding mechanism; 11. Flexible substrate; 12. Vibration mechanism; 13. Deformation drive assembly; 14. Flexible electrode layer; 2. Weighing mechanism; 3. Explosion-proof shell; 4. Workbench; 5. Feeding mechanism; 6. Medicine cup; 7. Inert gas nozzle; 8. Negative pressure suction nozzle. Detailed Implementation

[0020] 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.

[0021] The purpose of this invention is to provide a pyrotechnic agent weighing device that uses variable flow channel micro-vibration precision feeding to solve the problems existing in the prior art. It can actively adapt to the material characteristics, effectively prevent residues, and effectively improve the weighing accuracy.

[0022] 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.

[0023] Example 1 This invention provides a pyrotechnic agent weighing device employing variable flow channel micro-vibration precision feeding, as shown in Figures 1-3. It includes: a worktable 4, a feeding mechanism 1, a weighing mechanism 2, and a control system. The feeding mechanism 1, weighing mechanism 2, and control system are all mounted on the worktable 4. The feeding mechanism 1 includes at least one flow channel unit, which comprises a flexible substrate 11, a vibration mechanism 12, and a deformation driving component 13. A material flow channel is formed on the top of the flexible substrate 11. The vibration mechanism 12 is disposed on the bottom surface of the flexible substrate 11 to drive the flexible substrate 11 to generate micro-vibrations. The deformation driving component 13 is disposed on the bottom surface of the flexible substrate 11 to adjust the curvature of the flexible substrate 11, thereby changing the cross-sectional shape and size of the material flow channel. The weighing mechanism 2 is connected to the outlet of the material flow channel and is used to place the powder cup 6. The control system is connected to the weighing mechanism 2... The vibration mechanism 12 and the deformation drive component 13 are connected by a signal. The control system can dynamically adjust the vibration frequency and amplitude of the vibration mechanism 12 and the driving parameters of the deformation drive component 13 based on the real-time weighing data fed back by the weighing mechanism 2. When the weighing mechanism 2 detects that the material weight is close to the target value, the control system can reduce the vibration intensity of the vibration mechanism 12 and decrease the material feeding speed. At the same time, the deformation drive component 13 changes the bending degree of the flexible substrate 11 and reduces the cross-sectional size of the material flow channel to reduce the amount of material falling. By setting the flexible substrate 11, the vibration mechanism 12, and the deformation drive component 13, the shape and size of the material flow channel cross-section and micro-vibration drive can be realized, allowing the feeding process to be flexibly adjusted according to real-time weighing data, improving the accuracy of feeding and meeting the weighing requirements of high-precision materials such as pyrotechnic agents. This dynamic adjustment mechanism can effectively avoid weighing errors caused by excessive or excessive feeding, ensuring that each weighing is accurate and close to the target value.

[0024] In a preferred embodiment, the deformation driving component 13 includes multiple independent actuation units arranged at intervals along the material flow channel. The control system can independently control the operating state of each actuation unit to generate local deformation at different locations on the flexible substrate 11. The multiple independent actuation units arranged at intervals along the material flow channel and independently controllable greatly enhance the ability to finely control the shape of the material flow channel. The control system can precisely adjust the local shape of the flow channel according to the flow conditions of the material at different locations, further optimizing the material conveying process, thereby better adapting to pyrotechnic agents with different properties and improving the adaptability and feeding accuracy of the entire weighing device.

[0025] In a preferred embodiment, the actuation unit is a piezoelectric ceramic sheet or a piezoelectric fiber. Piezoelectric ceramic sheets or piezoelectric fibers, as actuation units, have advantages such as fast response speed, high precision, and good stability. They can rapidly deform under the action of electrical signals applied by the control system, achieving precise control over the bending degree of the flexible substrate 11, thereby timely and accurately changing the cross-sectional shape and size of the material flow channel, providing reliable driving support for the precise feeding of pyrotechnic agents.

[0026] In a preferred embodiment, at least a portion of the wall surface of the material flow channel is covered with a flexible electrode layer 14. The control system is electrically connected to the flexible electrode layer 14 and applies a controllable voltage to the flexible electrode layer 14 to adjust the electrostatic adsorption force of the material flow channel wall. By providing a flexible electrode layer 14 on the material flow channel wall and adjusting its electrostatic adsorption force by the control system, the adhesion of pyrotechnic agents to the flow channel wall can be effectively reduced. This not only helps to maintain the smooth flow of the material channel and avoid uneven feeding or blockage caused by agent adhesion, but also reduces the impact of residual agents on subsequent weighing, further improving the accuracy and reliability of weighing.

[0027] In a preferred embodiment, the vibration mechanism 12 is an ultrasonic micro-vibrator. The high-frequency micro-vibration generated by the vibrator can make the material fluidized in the flow channel, effectively reducing the frictional resistance between the material and the flow channel wall, promoting the uniform and stable flow of the material, and reducing the problem of material supply interruption or fluctuation caused by material accumulation or bridging. It is especially suitable for processing pyrotechnic agents with a certain viscosity or easy agglomeration.

[0028] In a preferred embodiment, a cleaning mechanism is also included. This cleaning mechanism is located at the end of the material flow channel and mounted on the workbench 4. It includes an inert gas nozzle 7 and a negative pressure suction nozzle 8 that cooperates with the inert gas nozzle 7. The control system activates the cleaning mechanism during work breaks to purge and absorb the material flow channel end. This purge and suction cleaning during work breaks effectively removes residual pyrotechnic agents from the flow channel end, preventing the accumulation of residual agents from affecting subsequent feeding and weighing accuracy. The purging action of the inert gas nozzle 7 loosens and blows off agent particles adhering to the flow channel wall, while the negative pressure suction nozzle 8 promptly removes these particles, effectively avoiding cross-contamination and weighing errors that may be caused by residual agents, and ensuring the long-term stable operation of the device.

[0029] In a preferred embodiment, the weighing mechanism 2 includes a high-precision weighing sensor. This sensor accurately measures the weight of the material in the medicine cup 6, providing accurate real-time weighing data to the control system. This allows the control system to precisely adjust the vibration frequency and amplitude of the feeding mechanism 1, as well as the shape and size of the material flow channel, based on the accurate weight information. This achieves high-precision weighing of the pyrotechnic agent, meeting the stringent precision requirements for pyrotechnic agent metering.

[0030] In a preferred embodiment, the weighing mechanism 2 further includes an automatic calibration device. This device is signal-connected to the control system, and the control system can automatically activate the automatic calibration device for online calibration when the device starts, after a preset number of working cycles, or when environmental parameters change beyond a threshold. The automatic calibration device, in conjunction with the control system, ensures the accuracy of the weighing mechanism 2 upon startup, eliminating initial errors caused by prolonged disuse or changes in equipment status. Calibration after a preset number of working cycles promptly corrects errors that may accumulate due to continuous operation, ensuring long-term stability of weighing accuracy. Automatic calibration when environmental parameters change beyond a threshold adapts to different working environments, such as variations in temperature and humidity, ensuring consistently accurate and reliable weighing results.

[0031] In a preferred embodiment, the automatic calibration device includes a movable miniature standard weight and a driving component that drives the miniature standard weight to be loaded onto or removed from the load cell. The driving component is signal-connected to the control system. The movable miniature standard weight cooperates with the driving component and, driven by the control system signal, can be automatically loaded onto the load cell for calibration, and then automatically removed after calibration. This automated calibration method improves calibration efficiency and accuracy, reduces errors that may be caused by manual operation, and ensures that the load cell always maintains a high-precision working state.

[0032] In a preferred embodiment, the driving component is a robotic arm driven by a high-precision servo motor, coupled with a precision guide rail and ball screw structure, enabling precise displacement of the miniature standard weight in three-dimensional space. Its repeatability is ±0.01mm, ensuring the miniature standard weight is accurately and stably loaded onto or removed from the weighing sensor, avoiding adverse effects on calibration accuracy due to loading position deviations or mechanical impacts. The robotic arm's movements are precisely controlled by the control system. After starting the calibration program, the robotic arm smoothly places the miniature standard weight onto the weighing platform of the weighing sensor according to a preset path. After the weighing sensor reading stabilizes, the data is recorded. After calibration, the weight is safely moved back to its initial storage position. The entire process is highly automated, requiring no manual intervention. The high-precision servo motor-driven robotic arm, combined with the precision guide rail and ball screw structure, achieves precise displacement of the miniature standard weight in three-dimensional space. The extremely high repeatability ensures the accuracy and stability of the loading position of the miniature standard weight during calibration. This effectively avoids the negative impact of loading position deviation or mechanical shock on calibration accuracy, further improving the reliability of calibration and the accuracy of the weighing sensor. The entire calibration process is highly automated, requiring no manual intervention, which not only improves work efficiency but also reduces errors that may be introduced by human factors, ensuring that the weighing device provides high-precision weighing results stably over a long period of time.

[0033] In a preferred embodiment of this invention, the pyrotechnic agent weighing device employing variable flow channel micro-vibration precision feeding further includes an explosion-proof housing 3. The feeding mechanism 1 is located within the explosion-proof housing 3, and the outlet of the material flow channel extends through the wall of the explosion-proof housing 3 to the outside, connecting with the weighing mechanism 2. The explosion-proof housing 3 provides crucial safety assurance for the weighing process of the pyrotechnic agent. Placing the feeding mechanism 1 within the explosion-proof housing 3 effectively prevents potential explosions of the pyrotechnic agent during the feeding process from causing harm to surrounding personnel and equipment. Even in the event of an explosion, the explosion-proof housing 3 limits the blast radius, protecting the lives of operators and the integrity of other equipment, ensuring the entire weighing device operates in a safe environment.

[0034] In a preferred embodiment of this invention, the pyrotechnic agent weighing device employing variable flow channel micro-vibration precision feeding further includes a feeding mechanism 5. The feeding mechanism 5 is positioned above the starting end of the feeding mechanism 1 and is used to feed pyrotechnic agents into the material flow channel. The feeding mechanism 5 allows the pyrotechnic agents to be conveniently and accurately fed into the material flow channel, providing an initial material supply for subsequent feeding and weighing processes. It ensures that materials can enter the feeding mechanism 1 in an orderly manner, which is the foundation for the continuous and stable operation of the entire weighing device, and helps improve work efficiency and weighing accuracy.

[0035] In a preferred embodiment, the feeding mechanism 5 is a feeding funnel, which is positioned above the end of the flexible substrate 11 furthest from the weighing mechanism 2. The feeding funnel has a simple structure, is easy to use, and can guide the pyrotechnic agent smoothly into the material flow channel. Positioning it above the end of the flexible substrate 11 furthest from the weighing mechanism 2 conforms to the material flow direction and the overall layout of the device, facilitating the natural and smooth entry of material into the material flow channel and preventing blockages or spillage during entry, thus ensuring a smooth feeding process.

[0036] The present invention also provides a method for using a pyrotechnic agent weighing device employing variable flow channel micro-vibration precision feeding: 1. Preparation Equipment Installation and Inspection: Place the workbench 4 in a stable operating area, ensuring a safe and interference-free environment around the device. Check that the explosion-proof housing 3 is properly sealed, that all component connections are secure, and that wiring connections are correct and undamaged. Pay particular attention to checking the installation of the flexible substrate 11, vibration mechanism 12, and deformation drive assembly 13 in the feeding mechanism 1, as well as the status of the high-precision weighing sensor and automatic calibration device in the weighing mechanism 2. Ensure that the inert gas nozzle 7 and negative pressure suction nozzle 8 of the cleaning mechanism are not clogged.

[0037] Parameter setting: The target weight, as well as preset working cycle number, environmental parameter thresholds, and other related parameters are set through the control system. At the same time, based on the characteristics of the pyrotechnic agent to be weighed, the vibration frequency and amplitude of the vibration mechanism 12, the initial driving parameters of the deformation drive component 13, and the voltage of the flexible electrode layer 14 are initially set to provide initial conditions for the feeding and weighing process.

[0038] 2. Feeding process Adding the pyrotechnic agent: Pour the pyrotechnic agent into the feeding funnel. The feeding funnel guides the pyrotechnic agent smoothly into the beginning of the material flow channel, ensuring that the agent enters the feeding mechanism 1 in an orderly manner.

[0039] 3. Feeding and Weighing Process Start-up: The control system is turned on, and the device begins to operate. The vibration mechanism 12 drives the flexible substrate 11 to generate micro-vibrations, which causes the material to flow in the material channel. At the same time, the deformation drive component 13 adjusts the bending degree of the flexible substrate 11 according to preset parameters, changing the cross-sectional shape and size of the material channel to control the material feeding speed.

[0040] Real-time adjustment: A high-precision weighing sensor measures the weight of the material inside the medicine cup 6 in real time and feeds the data back to the control system. Based on the real-time weighing data, the control system dynamically adjusts the vibration frequency and amplitude of the vibration mechanism 12 and the driving parameters of the deformation drive component 13. When the material weight is detected to be close to the target value, the vibration intensity of the vibration mechanism 12 is reduced, the material feeding speed is decreased, and the cross-sectional size of the material flow channel is reduced by the deformation drive component 13 to reduce the amount of material falling, ensuring the accuracy of weighing. During this process, the control system will also adjust the voltage of the flexible electrode layer 14 as needed to reduce the adhesion of pyrotechnic agents to the flow channel wall and ensure smooth material conveying.

[0041] 4. Cleaning process Scheduled cleaning: During work breaks, the control system automatically starts the cleaning mechanism. Inert gas nozzle 7 sprays inert gas to purge the end area of ​​the material flow channel, loosening and blowing off the agent particles attached to the channel wall. At the same time, negative pressure suction nozzle 8 sucks away these particles in time, removing residual pyrotechnic agents at the end of the channel and preventing the accumulation of residual agents from affecting subsequent feeding and weighing accuracy.

[0042] 5. Calibration Process Automatic calibration: Start-up calibration: When the device is started, the control system automatically triggers the automatic calibration device. The drive component (such as a robotic arm driven by a high-precision servo motor) accurately loads miniature standard weights onto the weighing platform of the weighing sensor according to a preset path.

[0043] Calibration procedure: After the load cell reading stabilizes, record the data to complete the zero-point calibration. Subsequently, miniature standard weights of varying weights can be loaded as needed to perform range calibration. Once calibration is complete, the robotic arm safely returns the miniature standard weights to their initial storage position.

[0044] Regular and on-demand calibration: After a preset number of working cycles, or when environmental parameters (such as temperature, humidity, etc.) change beyond the threshold, the control system will automatically start the automatic calibration device to repeat the above calibration operation, ensuring that the load cell always maintains a high-precision working state and eliminating errors caused by continuous operation or environmental changes.

[0045] 6. End of work Shutting down the equipment: After completing the weighing task, shut down the control system and stop the operation of the vibration mechanism 12, deformation drive assembly 13 and other components.

[0046] Equipment cleaning: Perform a thorough cleaning of the equipment, including removing any residual chemicals and cleaning the equipment surfaces, to prepare it for the next use.

[0047] 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 pyrotechnic agent weighing device employing variable flow channel micro-vibration precision feeding, characterized in that: include: A feeding mechanism includes at least one flow channel unit, the flow channel unit including a flexible substrate, a vibration mechanism and a deformation driving component. A material flow channel is formed on the top of the flexible substrate. The vibration mechanism is disposed on the bottom surface of the flexible substrate to drive the flexible substrate to generate micro-vibrations. The deformation driving component is disposed on the bottom surface of the flexible substrate to adjust the degree of bending of the flexible substrate, thereby changing the cross-sectional shape and size of the material flow channel. A weighing mechanism, connected to the outlet of the material flow channel, is used to place medicine cups; as well as The control system is signal-connected to the weighing mechanism, the vibration mechanism, and the deformation drive component. Based on real-time weighing data fed back by the weighing mechanism, the control system dynamically adjusts the vibration frequency and amplitude of the vibration mechanism and the drive parameters of the deformation drive component. When the weighing mechanism detects that the material weight is close to the target value, the control system reduces the vibration intensity of the vibration mechanism, decreases the material feeding speed, and simultaneously changes the bending degree of the flexible substrate through the deformation drive component, reducing the cross-sectional size of the material flow channel to decrease the amount of material falling.

2. The pyrotechnic agent weighing device using variable flow channel micro-vibration precision feeding as described in claim 1, characterized in that: The deformation driving assembly includes multiple independent actuation units arranged at intervals along the material flow channel. The control system can independently control the operating state of each actuation unit to generate local deformation at different locations on the flexible substrate.

3. The pyrotechnic agent weighing device using variable flow channel micro-vibration precision feeding according to claim 2, characterized in that: The actuation unit is a piezoelectric ceramic sheet or a piezoelectric fiber.

4. The pyrotechnic agent weighing device using variable flow channel micro-vibration precision feeding according to claim 3, characterized in that: At least a portion of the wall surface of the material flow channel is covered with a flexible electrode layer. The control system is electrically connected to the flexible electrode layer and applies a controllable voltage to the flexible electrode layer to adjust the electrostatic adsorption force of the material flow channel wall surface.

5. The pyrotechnic agent weighing device using variable flow channel micro-vibration precision feeding according to claim 1, characterized in that: It also includes a cleaning mechanism, which is located at the end area of ​​the material flow channel and includes an inert gas nozzle and a negative pressure suction nozzle that cooperates with the inert gas nozzle; the control system controls the cleaning mechanism to start during the working interval to blow and adsorb and clean the end of the material flow channel.

6. The pyrotechnic agent weighing device using variable flow channel micro-vibration precision feeding according to claim 1, characterized in that: The weighing mechanism includes a high-precision weighing sensor.

7. The pyrotechnic agent weighing device using variable flow channel micro-vibration precision feeding according to claim 6, characterized in that: The weighing mechanism also includes an automatic calibration device, which is connected to the control system. The control system can automatically start the automatic calibration device for online calibration when the device is started, after a preset number of working cycles, or when environmental parameters change beyond a threshold.

8. The pyrotechnic agent weighing device with variable flow channel micro-vibration precision feeding according to claim 7, characterized in that: The automatic calibration device includes a movable miniature standard weight and a drive component that drives the miniature standard weight to be loaded onto or removed from the weighing sensor. The drive component is signal-connected to the control system.

9. The pyrotechnic agent weighing device with variable flow channel micro-vibration precision feeding according to claim 1, characterized in that: It also includes an explosion-proof enclosure, the feeding mechanism is located inside the explosion-proof enclosure, and the outlet of the material flow channel extends through the wall of the explosion-proof enclosure to the outside and connects with the weighing mechanism.

10. The pyrotechnic agent weighing device with variable flow channel micro-vibration precision feeding according to claim 1, characterized in that: It also includes a feeding mechanism, which is located above the starting end of the feeding mechanism and is used to feed pyrotechnic agents into the material flow channel.

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