Self-adaptive microfluid flexible plasma sterilization device and method

Abstract

The invention belongs to the field of plasma disinfection and sterilization, and provides a self-adaptive microfluid flexible plasma sterilization device and method.The self-adaptive microfluid flexible plasma sterilization device comprises a conveying sub-device, a flexible plasma generation sub-device, a surface scanning sub-device and a height collection sub-device; an electrode controller, a plurality of flexible electrodes and a plurality of miniature electric push rods are embedded in the flexible plasma generation sub-device. The basic information of the target sterilization object is obtained through the surface scanning sub-device and the height acquisition sub-device, and the shape of the flexible plasma generation sub-device is changed by using the electrode controller, so that the distance between the flexible electrode and the target sterilization object is consistent, and the function of automatically adjusting the shape of the flexible plasma generation sub-device is realized; meanwhile, the sterilization efficiency of the device is improved.

Description

Technical Field

[0001] The invention relates to the field of plasma disinfection and sterilization, and in particular to an adaptive microfluid flexible plasma sterilization device and method. Background Art

[0002] Plasma has the characteristics of high chemical activity and low temperature, and its applications in energy conversion, biomedicine, disinfection and sterilization are attracting more and more attention.

[0003] Although a large number of plasma sources have been developed, they are all only applicable to planar surfaces. For curved surfaces, the corresponding plasma array must be customized, otherwise the plasma will be processed unevenly, which limits the application of plasma arrays. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a method for monitoring the disinfection effect of a biosafety cabinet in a confined space.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] An adaptive microfluidic flexible plasma sterilization device comprises: a conveying sub-device, a flexible plasma generating sub-device, a surface scanning sub-device and a height acquisition sub-device; the flexible plasma generating sub-device is embedded with an electrode controller, a plurality of flexible electrodes and a plurality of micro electric push rods;

[0007] The flexible plasma generating sub-device and the height collecting sub-device are arranged on the upper side of the conveying sub-device; the surface scanning sub-device is arranged on the inner side wall of the conveying sub-device;

[0008] The conveying sub-device is used to transport the target sterilization object; the surface scanning sub-device is used to scan and record the shape and geometric information of the target sterilization object, and send the shape and geometric information to the electrode controller; the height collection sub-device is used to collect the height information of the target sterilization object, and send the height information to the electrode controller; the electrode controller is used to change the position of the flexible electrode through the micro electric push rod according to the shape and geometric information and the height information; the flexible plasma generating sub-device is used to generate sterilizing plasma.

[0009] Preferably, it also includes: a gas detection sub-device;

[0010] The gas detection sub-device is arranged on the inner side wall of the conveying sub-device;

[0011] The gas detection sub-device is used to collect gas information of the target sterilization object, and classify the freshness of the target sterilization object according to the gas information to obtain freshness data; the freshness data includes: fresh state and deteriorated state.

[0012] Preferably, it also includes: a sorting electric push rod and a collection box;

[0013] The collecting box is arranged on the outside of the conveying sub-device; the sorting electric push rod is arranged on the outside of the conveying sub-device opposite to the collecting box;

[0014] The sorting electric push rod is used to push the target sterilized objects whose freshness data is the deteriorated state into the collection box; the collection box is used to store the target sterilized objects whose freshness data is the deteriorated state.

[0015] Preferably, the surface scanning sub-device comprises: a scanning module, a connecting ball and a base;

[0016] The scanning module is connected to the connecting ball; the connecting ball is hinged to the base; the base is fixed on the inner wall of the conveying sub-device;

[0017] The base is used to fix the connecting ball and the scanning module; the connecting ball is used to change the angle of the scanning module; the scanning module is used to record the surface information of the target sterilization object at different angles, and integrate the surface information to obtain the shape geometry information.

[0018] Preferably, the height acquisition sub-device is embedded with: an infrared transmitter and a light receiver;

[0019] The infrared transmitter is used to transmit infrared rays to the upper side of the target sterilization object; the light receiver is used to receive reflected light from the target sterilization object and integrate the reflected light into the height information.

[0020] Preferably, the flexible plasma generating sub-device further comprises: an ABS plastic frame; the ABS plastic frame comprises a plurality of frame circular holes;

[0021] One of the flexible electrodes is disposed in each of the circular holes of the frame;

[0022] The ABS plastic frame is a double-layer square frame with an interval of a; the frame circular holes are distributed in a rectangular shape along the x-axis and y-axis directions on the ABS plastic frame; the distance between adjacent frame circular holes in the x-axis direction is b x The distance between adjacent circular holes of the frame in the y-axis direction is b y ; The number of circular holes in the frame in the x-axis direction is n x; The number of circular holes in the frame in the y-axis direction n y ; The minimum distance between the frame circular hole and the edge of the ABS plastic frame is c; The calculation formula for the length of the ABS plastic frame in the x-axis direction is L x =2c+n x ·l+(n x -l)b x ; L x is the length of the ABS plastic frame in the x-axis direction; l is the diameter of the circular hole of the frame; the calculation formula of the length of the ABS plastic frame in the y-axis direction is L y =2c+n y ·l+(n y -l)b y ; said L y is the length of the ABS plastic frame in the y-axis direction; the calculation formula for the total number of circular holes in the frame is: N is the total number of circular holes in the frame; α is the electrode array parameter.

[0023] Preferably, an adaptive microfluidic flexible plasma sterilization method comprises:

[0024] Using the conveying sub-device to control the target sterilized object to be transferred;

[0025] Using the gas detection sub-device to collect the gas information of the target sterilization object, and classifying the freshness of the target sterilization object according to the gas information to obtain the freshness data;

[0026] When the freshness data is in the fresh state, using the surface scanning sub-device to collect the shape and geometry information of the target sterilization object;

[0027] Using the height collection sub-device to collect the height information of the target sterilization object;

[0028] Based on the shape geometry information and the height information, using the electrode controller to control the micro electric push rod to change the position of the flexible electrode in the flexible plasma generating sub-device;

[0029] The target sterilization object is sterilized by using the flexible plasma generating sub-device.

[0030] Preferably, it also includes:

[0031] When the freshness data indicates the deteriorated state, the target sterilization object is pushed into the collection box by using the sorting electric push rod.

[0032] Preferably, the freshness of the target sterilization object is classified according to the gas information, and before the freshness data is obtained, the following steps are included:

[0033] The gas information is subjected to signal transformation to obtain denoised gas data.

[0034] Preferably, based on the shape geometry information and the height information, using the electrode controller to control the micro electric push rod to change the position of the flexible electrode in the flexible plasma generating sub-device comprises:

[0035] Based on the shape geometry information and the height information, using the electrode controller to control all the flexible electrodes to fit the upper surface of the target sterilization object;

[0036] Based on the shape geometry information and the height information, an adjustment value is calculated; the calculation formula of the adjustment value is: d is the adjustment value; H is the shortest distance between the ABS plastic frame and the belt conveyor in the conveying sub-device; p and q are both surface parameters;

[0037] The electrode controller is used to control all the flexible electrodes to move upward by a distance corresponding to the adjustment value.

[0038] The present invention discloses the following technical effects:

[0039] The present invention provides an adaptive microfluidic flexible plasma sterilization device and method. The surface scanning sub-device and the height acquisition sub-device are used to solve the problem of collecting structural information of the target sterilization object, and the acquisition of the upper surface shape information and height information of the target sterilization object is realized. The controller, the flexible electrode and the micro electric push rod are used to solve the problem of the fixed shape of the plasma generating device, and the function of using the controller to control the micro electric push rod to change the position of the flexible electrode is realized. The flexible plasma generating sub-device solves the problem of the source of plasma, and realizes the plasma sterilization function of the target sterilization object. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. 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 creative labor.

[0041] Figure 1 A schematic diagram of the core structure provided by an embodiment of the present invention;

[0042] Figure 2A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0043] Figure 3 A schematic diagram of the side structure provided by an embodiment of the present invention;

[0044] Figure 4 A schematic structural diagram of a flexible plasma generating sub-device provided in an embodiment of the present invention;

[0045] Figure 5 A schematic diagram of a collection box provided by an embodiment of the present invention;

[0046] Figure 6 A schematic diagram of a sorting electric push rod provided in an embodiment of the present invention;

[0047] Figure 7 A structural diagram of a surface scanning sub-device provided in an embodiment of the present invention;

[0048] Figure 8 A schematic diagram of a height acquisition sub-device provided in an embodiment of the present invention;

[0049] Fig. 9 A schematic diagram of a flexible electrode structure provided by an embodiment of the present invention;

[0050] Fig.10 A schematic diagram of the structure of a gas detection sub-device provided in an embodiment of the present invention;

[0051] Fig.11 A schematic diagram of a plasma sterilization process provided by an embodiment of the present invention;

[0052] Description of reference numerals:

[0053] 101-belt conveyor, 102-support frame, 103-baffle, 2-flexible plasma generating sub-device, 201-electric guide sleeve, 202-micro electric push rod, 203-connecting seat, 204-flexible electrode, 205-ABS plastic frame, 3-surface scanning sub-device, 301-scanning module, 302-connecting ball, 303-base, 4-height acquisition sub-device, 501-sorting electric push rod, 502-collection box, 6-gas detection sub-device, 601-switch, 602-indicator light. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0055] 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.

[0056] Figure 1 A core structure diagram provided for an embodiment of the present invention, Figure 2 The overall structural diagram provided by the embodiment of the present invention is as follows: Figure 3 A schematic diagram of the side structure provided by an embodiment of the present invention, Figure 4 The schematic diagram of the structure of the flexible plasma generating sub-device 2 provided in the embodiment of the present invention is as follows: Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the present invention provides an adaptive microfluidic flexible plasma sterilization device, including: a transport sub-device, a flexible plasma generating sub-device 2, a surface scanning sub-device 3 and a height acquisition sub-device 4; the flexible plasma generating sub-device 2 has an embedded electrode controller, a plurality of flexible electrodes 204 and a plurality of micro electric push rods 202;

[0057] The flexible plasma generating sub-device 2 and the height collecting sub-device 4 are arranged on the upper side of the conveying sub-device; the surface scanning sub-device 3 is arranged on the inner side wall of the conveying sub-device;

[0058] The transport sub-device is used to transport the target sterilized object; the surface scanning sub-device 3 is used to scan and record the shape and geometry information of the target sterilized object, and send the shape and geometry information to the electrode controller; the height acquisition sub-device 4 is used to acquire the height information of the target sterilized object, and send the height information to the electrode controller; the electrode controller is used to change the position of the flexible electrode 204 through the micro electric push rod 202 according to the shape and geometry information and the height information; the flexible plasma generating sub-device 2 is used to generate sterilizing plasma.

[0059] Specifically, the conveying sub-device includes: a belt conveyor 101, a support frame 102 and a baffle 103; the belt conveyor 101 is used to convey the target sterilization object; the support frame 102 is used to support the belt conveyor 101 to ensure the stability of the overall device; the baffle 103 is used to install a surface scanner, and the baffle 103 can be disassembled and installed according to corresponding work requirements to meet the diverse work requirements of the device.

[0060] Furthermore, it also includes: a gas detection sub-device 6;

[0061] The gas detection sub-device 6 is arranged on the inner side wall of the conveying sub-device;

[0062] The gas detection sub-device 6 is used to collect gas information of the target sterilization object, and classify the freshness of the target sterilization object according to the gas information to obtain freshness data; the freshness data includes: fresh state and deteriorated state.

[0063] refer to Figure 5 and Figure 6 , further comprising: a sorting electric push rod 501 and a collection box 502;

[0064] The collecting box 502 is arranged on the outside of the conveying sub-device; the sorting electric push rod 501 is arranged on the outside of the conveying sub-device opposite to the collecting box 502;

[0065] The sorting electric push rod 501 is used to push the target sterilized objects whose freshness data is a deteriorated state into the collection box 502; the collection box 502 is used to store the target sterilized objects whose freshness data is a deteriorated state.

[0066] refer to Figure 7 , the surface scanning sub-device 3 includes: a scanning module 301, a connecting ball 302 and a base 303;

[0067] The scanning module 301 is connected to the connecting ball 302; the connecting ball 302 is hinged to the base 303; the base 303 is fixed on the inner wall of the conveying sub-device; the fixing method of the base 303 can be hinged or magnetically adsorbed;

[0068] The base 303 is used to fix the connecting ball 302 and the scanning module 301; the connecting ball 302 is used to change the angle of the scanning module 301; the scanning module 301 is used to record the surface information of the target sterilization object at different angles, and integrate the surface information to obtain shape geometry information.

[0069] Optionally, the height acquisition sub-device 4 (refer to Figure 8 )Embedded: infrared transmitter and light receiver;

[0070] The infrared transmitter is used to transmit infrared rays to the upper side of the target sterilization object; the light receiver is used to receive the reflected light from the target sterilization object and integrate the reflected light into height information.

[0071] Furthermore, the flexible plasma generating sub-device 2 further comprises: an ABS plastic frame 205; the ABS plastic frame 205 comprises a plurality of frame circular holes;

[0072] Each of the circular holes of the frame is provided with a flexible electrode 204;

[0073] The ABS plastic frame 205 is a double-layer square frame with an interval of a. The frame circular holes are distributed in a rectangular shape along the x-axis and y-axis directions on the ABS plastic frame 205. The distance between adjacent frame circular holes in the x-axis direction is b. x The distance between adjacent circular holes of the frame in the y-axis direction is b y ; The number of circular holes in the frame in the x-axis direction is n x ; The number of circular holes in the frame in the y-axis direction n y The minimum distance between the circular hole of the frame and the edge of the ABS plastic frame 205 is c; the calculation formula of the length of the ABS plastic frame 205 in the x-axis direction is L x =2c+n x ·l+(n x -l)b x ; L x is the length of the ABS plastic frame 205 in the x-axis direction; l is the diameter of the circular hole of the frame; the calculation formula of the length of the ABS plastic frame 205 in the y-axis direction is L y =2c+n y ·l+(n y -l)b y ; said L y is the length of the ABS plastic frame 205 in the y-axis direction; the calculation formula for the total number of circular holes in the frame is: N is the total number of circular holes in the frame; α is the electrode array parameter.

[0074] Specifically, an adaptive microfluidic flexible plasma sterilization method comprises:

[0075] The target sterilized object is transferred by controlling the transfer sub-device;

[0076] The gas detection sub-device 6 is used to collect gas information of the target sterilization object, and the freshness of the target sterilization object is classified according to the gas information to obtain freshness data;

[0077] When the freshness data is in a fresh state, the surface scanning sub-device 3 is used to collect the shape and geometry information of the target sterilization object;

[0078] The height information of the target sterilization object is collected by using the height collection sub-device 4;

[0079] Based on the shape geometry information and height information, the electrode controller is used to control the micro electric push rod 202 to change the position of the flexible electrode 204 in the flexible plasma generating sub-device 2;

[0080] The flexible plasma generating sub-device 2 is used to sterilize the target sterilization object.

[0081] Furthermore, it also includes:

[0082] When the freshness data indicates a deteriorated state, the sorting electric push rod 501 is used to push the target sterilized object into the collection box 502 .

[0083] Preferably, the freshness of the target sterilization object is classified according to the gas information, and before the freshness data is obtained, the following steps are included:

[0084] Perform signal transformation on the gas information to obtain denoised gas data.

[0085] Further, based on the shape geometry information and the height information, the electrode controller is used to control the micro electric push rod 202 to change the position of the flexible electrode 204 in the flexible plasma generating sub-device 2, including:

[0086] Based on the shape geometry information and the height information, the electrode controller is used to control all the flexible electrodes 204 to fit the upper surface of the target sterilization object;

[0087] Based on the shape geometry information and height information, the adjustment value is calculated; the calculation formula of the adjustment value is: d is the adjustment value; H is the shortest distance between the ABS plastic frame 205 and the belt conveyor 101 in the conveying sub-device; p and q are both surface parameters;

[0088] The electrode controller is used to control all the flexible electrodes 204 to move upward by a distance corresponding to the adjustment value.

[0089] Specifically, the specific parameters for adjusting the numerical values ​​in the embodiment of the present invention are: H=50 mm; S(p,q)=10; d=5 mm.

[0090] Specifically, the height collection sub-device 4 includes on its surface: an infrared transmitter and a light receiver. The infrared transmitter emits an infrared light beam, and the light receiver receives the reflected light, and calculates the distance between the target sterilization object and the surface of the height collection sub-device 4 by measuring the time delay of the light, thereby providing accurate vertical displacement information.

[0091] Specifically, the surface scanning sub-device 3 is used to obtain detailed topological information of the surface of the target sterilized object in the scanning area, and accurately perceive the shape and geometric features of the surface of the target sterilized object. The calculation formula of the object surface feature parameters is: Among them, V i,j is the feature polygon vertex, m and n are the number of rows and columns of the matrix represented by the feature polygon vertex; p and q are surface parameters, A i,k (p) and A j,l(q) are the k-order and l-order spline functions in the direction of parameters p and q respectively. The surface scanning sub-device 3 obtains the specific shape information of the surface of the target sterilization object by scanning the entire surface.

[0092] Optionally, the ABS plastic frame 205 is a double-layer square frame with an interval of a. Each circular hole in the ABS plastic frame 205 has a single flexible electrode 204, which is used to ensure that each flexible electrode 204 has enough space to move flexibly. The ABS plastic frame 205 is a double-layer square frame with an interval of a; the circular holes of the frame are distributed in a rectangular shape on the ABS plastic frame 205 and are distributed in the x and y directions of the rectangle. The diameter of the circular holes of the frame is l; the distance between adjacent circular holes of the frame in the x direction is b x , the distance between adjacent circular holes of the frame in the y direction is b y ; The number of circular holes in the frame in the x direction is n x , the number of circular holes in the frame in the x direction is n y The minimum distance between the frame circular hole and the edge of the ABS plastic frame 205 is c; the lengths of the ABS plastic frame 205 in the x and y directions are L respectively. x =2c+n x ·l+(n x -l)b x ; L y =2c+n y ·l+(n y -l)b y ; The calculation formula for the number N of the frame circular holes is: And the number of circular holes in the ABS plastic frame 205 corresponds to the number of holes. The flexible electrode 204 array is divided into multiple independent control channels to achieve precise control of different areas. For example: according to the size of the surface of the target sterilization object, the movement of the flexible electrode 204 within the range of the surface of the target sterilization object is independently controlled to avoid unnecessary movement of the electrode outside the treatment range; or according to the shape integrity of the surface of the target sterilization object, the flexible electrode 204 is controlled to move in a telescopic manner to avoid wasting plasma resources.

[0093] Furthermore, the specific parameters of the flexible plasma generating sub-device 2 of the embodiment of the present invention are as follows: a=20 mm, c=19 mm, α=12 / 13, b x =b y =2mm, n x =n y (The circular holes of the frame are distributed in a square shape on the ABS plastic frame) According to the formula Calculate the number of flexible electrodes 204 N = n x ·n y =169;n x =ny =13.

[0094] See also Fig. 9 The micro electric push rod 202 includes: an electric guide sleeve 201, a push rod and a connection seat; the electric guide sleeve 201 is provided with a retractable push rod, and one end of the push rod is provided with a connection seat. The micro electric push rod 202 pushes or pulls back the flexible electrode 204 under the action of the electrode controller. Each flexible electrode 204 is connected to a micro electric push rod 202 to ensure the independence of the movement of each flexible electrode 204.

[0095] Furthermore, the electrode controller can realize dynamic adjustment of the flexible electrode 204 to better adapt to the shape of the surface of the target sterilization object.

[0096] Furthermore, the controller monitors the distance h between the flexible electrode 204 and the surface of the target sterilization object in real time and ensures that the operation is performed within a safe range. This safety limit setting is implemented through a height sensor, which provides real-time feedback information to guide the controller to adjust the position of all flexible electrodes 204 in real time. In addition, the safety limit can also include controlling the contact force between the flexible electrode 204 and the target sterilization object and monitoring the force F applied to the surface of the target sterilization object. By setting the maximum allowable force value to F max A force sensor is set at the end of the flexible electrode 204 to monitor the contact force in real time; the controller can identify it in time to prevent the occurrence of situations that may cause damage to the flexible electrode 204. The distance range and force range in the safety limit setting are as follows:

[0097]

[0098] Wherein, H is the distance between the lowermost ABS plastic frame 205 and the upper surface of the conveyor belt of the conveyor device; h1 is the height at which the target sterilization object is horizontally placed on the conveyor device.

[0099] See also Fig.10 The gas detection sub-device 6 includes: a gas detection sensor array, a switch 601, an indicator light 602 and a gas inlet and outlet; the switch 601 and the gas inlet and outlet are respectively placed on the two sides of the gas detection device box body. The bottom of the box body can be placed on the baffles 103 on the left and right sides of the conveying device. The gas detection sensor device adopts a signal processing method for a gas detection sensor device to process the odor information of the target sterilization object, judge the freshness of the target sterilization object, and divide the freshness of the target sterilization object into two levels: deterioration and freshness.

[0100] Furthermore, a signal processing algorithm is used to process the multivariate time series data generated by the gas detection sensor array. The effect of the signal processing algorithm is affected by the noise input from the gas sensor array, and the presence of noise has an adverse effect on the signal processing algorithm. The embodiment of the present invention uses signal transformation to perform noise filtering; the purpose of noise filtering is to reduce the noise level and reduce the impact of noise on the signal processing algorithm. For a given signal Perform a signal transformation, mathematically expressed as:

[0101]

[0102] Among them, ψ(u,v) is the gas information after noise reduction; u and v represent the signal transformation scale and translation parameters, t is time, and ε * () represents the complex conjugate of ε().

[0103] In the process of signal processing, signal transformation is required to ensure that the reconstructed signal x(t) can represent the information content of the original signal. The reconstruction of the signal x(t) satisfies:

[0104]

[0105] In the formula, α u,v Represents the approximate coefficient after signal transformation; β u,v Detailed coefficients after signal transformation; φ u,v (t) represents the scaling factor after signal transformation; ε u,v (t) is the signal decomposition function.

[0106] A signal contaminated by noise is represented as:

[0107] y(t)=x(t)+μ*λ(t)

[0108] Where x(t) and y(t) represent the reconstructed signal and the original (noise-containing) signal, respectively; μ and λ(t) represent the noise level and the noise function, respectively.

[0109] Furthermore, information quality is an important factor in finding the best characteristic frequency for each signal. A high-quality reconstructed signal means that more important information from the original signal can be stored. The present invention uses information quality ratio to determine the most appropriate characteristic frequency, and the calculation formula is as follows:

[0110]

[0111] Where K(x(t), y(t)) is the information quality ratio; x, y, δ(x), δ(y), δ(x, y) represent the specific value of the original signal, the specific value of the denoised signal, the marginal probability function of the original signal, the marginal probability function of the denoised signal, and the joint probability function of the two signals, respectively.

[0112] Specifically, K=0 means that the reconstructed signal completely loses important information from the original signal, and the characteristic frequency of the selected signal is incompatible with the original signal; K=1 means that the selected signal can perfectly reconstruct the original signal without losing important information.

[0113] Specifically, the sorting electric push rod 501 includes a DC drive motor, a retractable push rod and a base 303. The electric push rod and the collection box 502 are respectively located on both sides of the conveying device to ensure that the electric push rod can push the deteriorated target sterilization objects on the conveying device into the collection box 502.

[0114] In summary, the plasma sterilization process provided in this embodiment is as follows: Fig.11 As shown, it specifically includes: the object to be tested is transported to the surface scanning sub-device and the height acquisition sub-device in sequence through the conveying sub-device, and the shape and geometry information of the target sterilized object and the height information of the target sterilized object are recorded and acquired respectively. The electrode controller controls each micro electric push rod to push and pull the flexible electrode according to the acquired shape and geometry information and height information, and ensures that each electrode tip (with a force sensor) contacts the object to be tested first. If the force F on the surface of the target sterilized object is greater than F max , then due to safety restrictions, all flexible electrodes return to their initial states, and the electrode controller continues to control their height positions through the micro-electric push rod; otherwise, the micro-electric push rod will pull all electrodes to move the same distance to ensure that the distance between each electrode and the object to be tested is consistent, and plasma sterilization begins; after sterilization, the gas detection sub-device collects gas information of the target sterilized object, and classifies the freshness of the target sterilized object according to the gas information into a deteriorated state and a fresh state. If the target sterilized object is in a deteriorated state, the conveying sub-device transports the target sterilized object to the sorting electric push rod, and the sorting electric push rod pushes the target sterilized object into the collection box; otherwise, the next object to be tested is conveyed to start the next cycle.

[0115] The beneficial effects of the present invention are as follows:

[0116] The present invention obtains basic information of the target sterilization object through a surface scanning sub-device and a height acquisition sub-device, and uses an electrode controller to change the shape of the flexible plasma generating sub-device so that the distance between the flexible electrode and the target sterilization object is consistent, thereby realizing the function of autonomously adjusting the shape of the flexible plasma generating sub-device and improving the sterilization efficiency of the device.

[0117] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0118] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An adaptive microfluidic flexible plasma sterilization device, characterized in that: include: A conveying sub-device, a flexible plasma generating sub-device, a surface scanning sub-device, and a height collecting sub-device; The flexible plasma generating sub-device is embedded with an electrode controller, a plurality of flexible electrodes and a plurality of micro electric push rods; The flexible plasma generating sub-device and the height collecting sub-device are arranged on the upper side of the conveying sub-device; the surface scanning sub-device is arranged on the inner side wall of the conveying sub-device; The transport sub-device is used to transport the target sterilized object; the surface scanning sub-device is used to scan and record the shape and geometry information of the target sterilized object, and send the shape and geometry information to the electrode controller; The height acquisition sub-device is used to collect height information of the target sterilization object and send the height information to the electrode controller; the electrode controller is used to change the position of the flexible electrode through the micro electric push rod according to the shape geometry information and height information; the flexible plasma generation sub-device is used to generate sterilization plasma.

2. The adaptive microfluidic flexible plasma sterilization device according to claim 1, characterized in that: Also included: a gas detection sub-device; The gas detection sub-device is arranged on the inner side wall of the conveying sub-device; The gas detection sub-device is used to collect gas information of the target sterilization object, and classify the freshness of the target sterilization object according to the gas information to obtain freshness data; the freshness data includes: fresh state and deteriorated state.

3. The adaptive microfluidic flexible plasma sterilization device according to claim 2, characterized in that: Also includes: Sorting electric push rods and collection boxes; The collecting box is arranged on the outside of the conveying sub-device; the sorting electric push rod is arranged on the outside of the conveying sub-device opposite to the collecting box; The sorting electric push rod is used to push the target sterilized object whose freshness data is the deteriorated state into the collection box; The collection box is used to store the target sterilization objects whose freshness data is the deteriorated state.

4. The adaptive microfluidic flexible plasma sterilization device according to claim 1, characterized in that: The surface scanning sub-device comprises: a scanning module, a connecting ball and a base; The scanning module is connected to the connecting ball; the connecting ball is hinged to the base; the base is fixed on the inner wall of the conveying sub-device; The base is used to fix the connecting ball and the scanning module; the connecting ball is used to change the angle of the scanning module; the scanning module is used to record the surface information of the target sterilization object at different angles, and integrate the surface information to obtain the shape geometry information.

5. The adaptive microfluidic flexible plasma sterilization device according to claim 1, characterized in that: The height acquisition sub-device is embedded with: an infrared transmitter and a light receiver; The infrared transmitter is used to transmit infrared rays to the upper side of the target sterilization object; the light receiver is used to receive reflected light from the target sterilization object and integrate the reflected light into the height information.

6. The adaptive microfluidic flexible plasma sterilization device according to claim 1, characterized in that: The flexible plasma generating sub-device further comprises: an ABS plastic frame; the ABS plastic frame comprises a plurality of frame circular holes; One of the flexible electrodes is disposed in each of the circular holes of the frame; The ABS plastic frame is a double-layer square frame with an interval of a; the frame circular holes are distributed in a rectangular shape along the x-axis and y-axis directions on the ABS plastic frame; the distance between adjacent frame circular holes in the x-axis direction is b x The distance between adjacent circular holes of the frame in the y-axis direction is b y ; The number of circular holes in the frame in the x-axis direction is n x ; The number of circular holes in the frame in the y-axis direction n y ; The minimum distance between the frame circular hole and the edge of the ABS plastic frame is c; The calculation formula for the length of the ABS plastic frame in the x-axis direction is L x =2c+n x ·l+(n x -l)b x ; L x is the length of the ABS plastic frame in the x-axis direction; l is the diameter of the circular hole of the frame; the calculation formula of the length of the ABS plastic frame in the y-axis direction is L y =2c+n y ·l+(n y -l)b y ; said L y is the length of the ABS plastic frame in the y-axis direction; the calculation formula for the total number of circular holes in the frame is: N is the total number of circular holes in the frame; α is the electrode array parameter.

7. An adaptive microfluidic flexible plasma sterilization method, characterized in that: Applied to an adaptive microfluidic flexible plasma sterilization device as described in claims 1 to 6, the sterilization method comprises: Using the conveying sub-device to control the target sterilized object to be transferred; Using the gas detection sub-device to collect the gas information of the target sterilization object, and classifying the freshness of the target sterilization object according to the gas information to obtain the freshness data; When the freshness data is in the fresh state, using the surface scanning sub-device to collect the shape and geometry information of the target sterilization object; Using the height collection sub-device to collect the height information of the target sterilization object; Based on the shape geometry information and the height information, using the electrode controller to control the micro electric push rod to change the position of the flexible electrode in the flexible plasma generating sub-device; The target sterilization object is sterilized by using the flexible plasma generating sub-device.

8. The adaptive microfluidic flexible plasma sterilization method according to claim 7, characterized in that: Also includes: When the freshness data indicates the deteriorated state, the target sterilization object is pushed into the collection box by using the sorting electric push rod.

9. The adaptive microfluidic flexible plasma sterilization method according to claim 7, characterized in that: Classifying the freshness of the target sterilization object according to the gas information and obtaining the freshness data includes: The gas information is subjected to signal transformation to obtain denoised gas data.

10. The adaptive microfluidic flexible plasma sterilization method according to claim 7, characterized in that: Based on the shape geometry information and the height information, the electrode controller is used to control the micro electric push rod to change the position of the flexible electrode in the flexible plasma generating sub-device, including: Based on the shape geometry information and the height information, using the electrode controller to control all the flexible electrodes to fit the upper surface of the target sterilization object; Based on the shape geometry information and the height information, an adjustment value is calculated; the calculation formula of the adjustment value is: d is the adjustment value; H is the shortest distance between the ABS plastic frame and the belt conveyor in the conveying sub-device; p and q are both surface parameters; The electrode controller is used to control all the flexible electrodes to move upward by a distance corresponding to the adjustment value.

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