Integrated manufacturing system and method of underwater acoustic sensor based on bionic cilia

Abstract

The present invention provides an integrated manufacturing model and method for an underwater acoustic sensor based on bionic cilia, belonging to the field of underwater acoustic sensor manufacturing. The model and method include a photocuring printing device for printing and two integrated manufacturing printing models for underwater acoustic sensors based on bionic cilia, which are respectively used to implement the print positioning function in the first print and the structural protection function in the second print. A photocuring printing method is also provided to protect fragile structures by improving the printing process. The present invention can directly form bionic cilia on the base of the underwater acoustic sensor through photocuring printing, effectively avoiding the traditional glue bonding method that leaves glue residue at the bottom of the bionic cilia, which has an adverse effect on the performance of the underwater acoustic sensor; effectively avoiding the problem of inaccurate positioning caused by manual visual positioning; and effectively protecting the fragile cross-beam structure on the surface of the sensor base.

Description

Technical Field

[0001] The present invention belongs to the field of underwater acoustic sensor manufacturing, and in particular relates to a manufacturing system and method for positioning and forming bionic cilia on a cross beam by utilizing light-curing printing technology. Background Art

[0002] An underwater acoustic sensor is a device used to detect acoustic signals in water and is widely used in underwater exploration, navigation, and environmental monitoring. Because low-frequency underwater acoustic signals are less absorbed in water and travel longer distances, they are a common method for long-range and deep-sea exploration. The acquisition and processing of low-frequency underwater acoustic signals is a topic of considerable interest to researchers in the fields of ocean acoustics and hydroacoustics. Currently, the use of ciliary vector underwater acoustic sensors to measure low-frequency underwater acoustic signals is becoming an increasingly popular trend. These sensors detect sound pressure gradients using a ciliary-cross-beam structure, eliminating the need for elastic suspension and thus avoiding interference from extremely low-frequency resonance peaks.

[0003] Stereolithography is an advanced 3D printing technology based on the unique property of photosensitive materials that cure under ultraviolet (UV) light. This technology primarily uses photopolymer resins as printing materials. When exposed to UV light of a specific wavelength, these resins undergo a photopolymerization reaction, transforming into a solid structure, enabling the precise modeling of 3D objects.

[0004] Weirong Ren and others from North University of China mentioned in the paper "Design and Implementation of Crossed-circle MEMS Ciliary Vector Hydrophone" published in Measurement in 2022 that the manufacturing method of the cilia of the underwater acoustic sensor mainly relies on manual bonding. Specifically, the operator uses tools such as microscopes and mobile platforms to visually adhere the prefabricated cilia to the center of the sensor's cross beam. This manual operation method requires high skills from the operator and has a series of problems: first, the cross beam of the sensor is very fragile and easily damaged during operation; second, the cilia bonding process often leaves glue residue at the bottom, affecting the performance of the sensor; finally, the accuracy of the final position of the cilia is difficult to guarantee, which further restricts the manufacturing accuracy of the sensor. Since the required bionic cilia have a radius of only 175μm, but a height of several millimeters, using conventional methods to print on the sensor will cause problems such as sample non-formation and damage to the cross beam structure. Summary of the Invention

[0005] This invention aims to overcome the shortcomings of existing technologies by providing a system and method for the integrated manufacturing of underwater acoustic sensors using a stereolithography printer. This method has a simple operational process, requiring only two specific printing operations and corresponding models to avoid damage to the cross-beam structure and resolve the problem of sample formation failure, while precisely forming the required biomimetic cilia on the sensor base.

[0006] In order to achieve the above object, the technical solution adopted in the present invention is:

[0007] A bionic cilia-based integrated manufacturing system for underwater acoustic sensors includes a photocuring printing device and two bionic cilia-based integrated manufacturing printing models for underwater acoustic sensors. The first integrated manufacturing printing model is used to implement print positioning during the first print, and is defined as the print positioning model. The second integrated manufacturing printing model is used to implement structural protection during the second print, and is defined as the structural protection model.

[0008] The printing positioning model includes a positioning printing base 10 with a plate-like structure, four fixing clips 11 for fixing the underwater acoustic sensor base 13 with a cross-beam structure on the positioning printing base 10, and a positioning base column 12 for positioning the center point of the underwater acoustic sensor base 13 to the center point of the recessed area, wherein there is a recessed area in the center of the positioning printing base 10.

[0009] Furthermore, the length and width of the positioning printing base 10 are the maximum length and width that can be printed by the light-curing printing device, and its height is twice the height of the underwater acoustic sensor base 13.

[0010] Furthermore, the length of a recessed area in the center of the positioning printing base 10 is twice the length of the underwater sensor base 13, and the width of the recessed area is twice the width of the underwater sensor base 13. The center of the recessed area is four symmetrical fixing clips 11 and a positioning base column 12.

[0011] Furthermore, the fixing clip 11 is a thin cylinder inclined at a certain angle to the positioning printing base 10. The distance between the center points of the bottom circles of each pair of centrally symmetrical fixing clips 11 is equal to the width of the underwater sensor base 13 plus twice the cylindrical diameter of the fixing clip 11. The clamping of the underwater sensor base is achieved through the inclined design.

[0012] Furthermore, the positioning base column 12 is a thin cylinder perpendicular to the positioning printing base 10, which is used to play a positioning role when the underwater acoustic sensor base 13 is embedded in the fixing clip 11.

[0013] Furthermore, the underwater acoustic sensor base 13 is a silicon device to be processed, not a printed product.

[0014] Furthermore, preferably, by widening the central recessed area of ​​the printed positioning model, the corresponding fixing clips 11 and positioning columns 12 are arranged in an array, and a plurality of underwater acoustic sensor bases 13 can be placed.

[0015] The structural protection model includes bionic cilia 14 and a surrounding protective layer structure 15. The bionic cilia 14 and the annular protective layer structure 15 are of the same height. The bionic cilia 14 are vertically formed at the center of the cross beam of the underwater acoustic sensor base 13, and the protective layer structure 15 is vertically formed on the positioning printing base 10.

[0016] Furthermore, the photocuring printing device includes: a movable guide rail 1 at the bottom, a resin tank shaft 2 that can move along the movable guide rail 1 in the y-axis direction, a resin tank 3 fixed to the resin tank shaft 2, a printing platform shaft 4 perpendicularly fixed to the resin tank shaft 2, a printing platform 5 that can move along the printing platform shaft 4 in the z-axis direction, a release film 6 mounted above the resin tank 3, a laser rangefinder 7, a UV curing light source 8, and a real-time monitoring camera 9 fixed directly above the center of the movable guide rail 1. The laser rangefinder 7 can move along the x-axis, and the printing platform 5 and release film 6 are both removable.

[0017] A bionic cilia-based integrated manufacturing method for underwater acoustic sensors, implemented based on the aforementioned integrated manufacturing system for underwater acoustic sensors, is a light-curing printing method that protects fragile structures by improving the printing process, and includes the following steps:

[0018] Step 1) Move the resin tank shaft 2, the resin tank 3 mounted thereon, the print platform shaft 4 fixed thereto, the print platform 5 mounted thereon, and the release film 6 mounted on the resin tank 3 along the movable guide rail 1 to the center of the guide rail so that the center points of the print platform 5, the release film 6, and the UV curing light source 8 are aligned vertically.

[0019] Step 2) Changing the y-axis position of the release film 6 mounted on the resin tank 3 by moving the resin tank shaft 2, and changing the x-axis position of the laser rangefinder 7 relative to the release film 6 by moving the laser rangefinder 7. The z-axis heights of the four corners of the release film 6 are measured using the laser rangefinder 7, and the release film 6 is leveled until the z-axis height difference between any two corners is less than 20 μm.

[0020] Step 3) Remove the release film 6 from the resin tank 3, change the y-axis position of the print platform 5 by moving the resin tank shaft 2, and change the x-axis position of the laser rangefinder 7 relative to the print platform 5 by moving the laser rangefinder 7. Use the laser rangefinder 7 to measure the z-axis heights of the four corners of the print platform 5, and level the print platform 5 until the z-axis height difference between any two corners is less than 20 μm.

[0021] Step 4) Install the release film 6 onto the resin tank 3. Use a dropper to add liquid resin to the tank 3 until the liquid surface is flush with the scale line inside the tank 3. At this point, the lower end of the print platform 5 is completely immersed in the liquid resin, and the lower surface of the release film 6 is in contact with the upper surface of the liquid resin.

[0022] Step 5) Turn on the UV curing light source 8 and observe the pattern formed by the UV curing light source 8 on the release film 6 using the real-time monitoring camera 9. The position of the release film 6 on the z-axis is changed by adjusting the height of the resin tank 3 until the UV curing light source 8 forms a highly concentrated light spot on the release film 6;

[0023] Step 6) Turn off the UV curing light source 8, move the laser rangefinder 7 to be directly above the center point of the release film 6, and measure and record the z-axis position of the release film 6 at this time;

[0024] Step 7) Remove the release film 6 from the resin tank 3 and use a blade to gently scrape off the solid resin attached to the lower surface of the release film 6 due to the light spot formed by the UV curing light source 8 in the previous step;

[0025] Step 8) Install the release film 6 onto the resin tank 3. Adjust the position of the print platform 5 on the print platform axis 4 based on the z-axis position of the release film 6 measured in step 6) until the upper surface of the lower end of the print platform 5 is in contact with the lower surface of the release film 6.

[0026] Step 9) Import the printing model file used to implement the print positioning function, set the illumination time and intensity of the UV curing light source 8 during the printing process, set the descent speed and single descent distance of the printing platform 5 during the printing process, set the waiting time for the liquid resin to level after each descent of the printing platform 5, and perform the first print;

[0027] Step 10) After the first print is complete, remove the release film 6 from the resin tank 3, remove the print platform 5 from the print platform shaft 4, and remove the printed part adhered to the upper surface of the lower end of the print platform 5. The printed part includes a positioning printing base 10 formed by liquid resin cured by UV curing light source 8, four fixing clips 11, and a positioning base column 12;

[0028] Step 11) Clean the printing platform 5 and the positioning printing base 10, four fixing clips 11, and positioning pillars 12 still attached to the printing platform 5 with 95% ethanol. Push the silicon hydroacoustic sensor base 13 horizontally into the square gap formed by the four fixing clips 11 and positioning pillars 12.

[0029] Step 12) Install the release film 6 onto the resin tank 3. Use a rubber-tipped dropper to add liquid resin to the resin tank 3 up to the scale line on the inner cavity of the resin tank 3. Repeat the operation in step 5). When the UV curing light source 8 forms a highly concentrated light spot on the release film 6, adjust the height of the resin tank 3 and move the z-axis position of the release film 6 upward by 0.1 mm.

[0030] The above steps ensure that during subsequent printing, the upper surface of the solid resin part generated by the UV curing light source 8 will not adhere very firmly to the lower surface of the release film 6, thereby avoiding the tension generated when the release film 6 is removed after printing is completed, which may cause damage to the printed bionic cilia 14 and the cross beam structure on the underwater acoustic sensor base 13 connected thereto.

[0031] Step 13) Turn off the UV curing light source 8, move the laser rangefinder 7 to be directly above the center point of the release film 6, and measure and record the z-axis position of the release film 6 at this time;

[0032] Step 14) Remove the release film 6 from the resin tank 3 and use a blade to gently scrape off the solid resin attached to the lower surface of the release film 6 due to the light spot formed by the UV curing light source 8 in the previous step;

[0033] Step 15) Mount the print platform 5 onto the print platform shaft 4 and the release film 6 onto the resin tank 3. Adjust the position of the print platform 5 on the print platform shaft 4 based on the z-axis position of the release film 6 measured in step 13) until the upper surface of the hydroacoustic sensor base 13 embedded in the first print on the print platform 5 is in contact with the lower surface of the release film 6.

[0034] Step 16) Import the printing model file used to implement the structure protection function, set the illumination time and intensity of the UV curing light source 8 during the printing process, set the single descent distance of the printing platform 5, set the waiting time for the liquid resin to level after each descent of the printing platform 5, set the descent speed of the printing platform 5 during the printing process to half of the setting of the first printing to prevent the liquid resin in the resin tank 3 from flowing too fast and damaging the printed structure, and perform a second print;

[0035] Step 17) After the second print is completed, remove the printing platform 5 and the resin print adhered to the surface of the printing platform 5 and the underwater acoustic sensor base 13 embedded in the positioning printing base 10. The resin print includes the positioning printing base 10, four fixing clips 11, the positioning base 12, the bionic cilia 14 and the protective layer structure 15. After removing them, place them in 95% ethanol and shake them gently for one minute to wash off the residual liquid resin on the sample. Finally, remove them and wait for them to dry naturally.

[0036] Step 18) Use a thin blade to insert along the contact surface between the printing platform 5 and the printed positioning printing base 10, and completely scrape off the positioning printing base 10 and the four fixing clips 11 and the positioning column 12 on the positioning printing base 10, as well as the underwater acoustic sensor base 13 embedded between the fixing clips 11 and the positioning column 12, the bionic cilia 14 generated at the center of the cross cantilever beam of the underwater acoustic sensor base 13, and the protective layer structure 15 surrounding the periphery of the underwater acoustic sensor base 13. Use the tip of the knife to gently push the underwater acoustic sensor base 13 with the bionic cilia 14 in the center of the cross beam, and remove the bionic cilia 14 together with the underwater acoustic sensor base 13 from the side of the fixing clip 11 without the positioning column 12, so that the underwater acoustic sensor composed of the bionic cilia 14 and the underwater acoustic sensor base 13 can be obtained.

[0037] The beneficial effects of the present invention are as follows:

[0038] (1) The present invention can directly form bionic cilia on the base of the underwater acoustic sensor by photocuring printing, effectively avoiding the traditional glue bonding method that leaves glue residue at the bottom of the bionic cilia and has an adverse effect on the performance of the underwater acoustic sensor.

[0039] (2) The present invention uses the equipment in the light-curing printing system to locate the position of the bionic cilia on the sensor, effectively avoiding the problem of inaccurate positioning caused by manual visual positioning.

[0040] (3) The present invention can effectively protect the fragile cross-beam structure on the surface of the sensor base. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic structural diagram of the light-curing printing device used in the present invention.

[0042] Figure 2 It is a structural diagram of a printing model for realizing the printing positioning function of the present invention.

[0043] Figure 3 It is a structural schematic diagram of the printing model of the present invention that realizes the structural protection function.

[0044] Figure 4 Schematic diagram of the protective printing structure and the cross beam structure of the underwater acoustic sensor base of the printing method of the present invention; Figure 4 (a) is the principle of traditional light-curing printing. Figure 4 (b) is the light-curing printing principle of the method of the present invention.

[0045] Figure 5 This is a diagram showing the effect of a manual bonding method compared to the method of the present invention; Figure 5 (a) The effect of the underwater acoustic sensor made by the traditional manual bonding method. Figure 5 (b) is the effect of the underwater acoustic sensor made by the method of the present invention.

[0046] In the figure: 1 moving guide rail; 2 resin tank shaft; 3 resin tank; 4 printing platform shaft; 5 printing platform; 6 release film; 7 laser rangefinder; 8 UV curing light source; 9 real-time monitoring camera; 10 positioning printing base; 11 fixing clip; 12 positioning base column; 13 underwater acoustic sensor base; 14 bionic cilia; 15 protective layer structure. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below with reference to the embodiments so that those skilled in the art can implement the invention with reference to the description.

[0048] like Figure 1 As shown in FIG, the light-curing printing device to which the present invention is applied comprises: a movable guide rail 1, a resin tank shaft 2, a resin tank 3, a printing platform shaft 4, a printing platform 5, a release film 6, a laser rangefinder 7, a UV curing light source 8, and a real-time monitoring camera 9; Figure 2 As shown in FIG, the printing model of the present invention realizes the printing positioning function, and the model includes a positioning printing base 10, a fixing clip 11 and a positioning base column 12. The underwater acoustic sensor base 13 does not belong to this model, but is an additional silicon device to be processed that is inserted after the printing of this model is completed; Figure 3 1 is a printed model of the present invention for realizing the structural protection function, and the model includes bionic cilia 14 and a protective layer structure 15. The height of the underwater acoustic sensor base 10 is measured in advance to be 300 μm, and the length and width are both 4.6 mm.

[0049] Step 1) Move the resin tank shaft 2, the resin tank 3 mounted thereon, the print platform shaft 4 fixed thereto, the print platform 5 mounted thereon, and the release film 6 mounted on the resin tank 3 along the movable guide rail 1 to the center of the guide rail so that the center points of the print platform 5, the release film 6, and the UV curing light source 8 are aligned vertically.

[0050] Step 2) Changing the y-axis position of the release film 6 mounted on the resin tank 3 by moving the resin tank shaft 2, and changing the x-axis position of the laser rangefinder 7 relative to the release film 6 by moving the laser rangefinder 7. The z-axis heights of the four corners of the release film 6 are measured using the laser rangefinder 7, and the release film 6 is leveled until the z-axis height difference between any two corners is less than 20 μm.

[0051] Step 3) Remove the release film 6 from the resin tank 3, change the y-axis position of the print platform 5 by moving the resin tank shaft 2, and change the x-axis position of the laser rangefinder 7 relative to the print platform 5 by moving the laser rangefinder 7. Use the laser rangefinder 7 to measure the z-axis heights of the four corners of the print platform 5, and level the print platform 5 until the z-axis height difference between any two corners is less than 20 μm.

[0052] Step 4) Install the release film 6 onto the resin tank 3. Use a dropper to add liquid resin to the tank 3 until the liquid surface is flush with the scale line inside the tank 3. At this point, the lower end of the print platform 5 is completely immersed in the liquid resin, and the lower surface of the release film 6 is in contact with the upper surface of the liquid resin.

[0053] Step 5) Turn on the UV curing light source 8 and observe the pattern formed by the UV curing light source 8 on the release film 6 using the real-time monitoring camera 9. The position of the release film 6 on the z-axis is changed by adjusting the height of the resin tank 3 until the UV curing light source 8 forms a highly concentrated light spot on the release film 6;

[0054] Step 6) Turn off the UV curing light source 8, move the laser rangefinder 7 to be directly above the center point of the release film 6, and measure and record the z-axis position of the release film 6 at this time;

[0055] Step 7) Remove the release film 6 from the resin tank 3 and use a blade to gently scrape off the solid resin attached to the lower surface of the release film 6 due to the light spot formed by the UV curing light source 8 in the previous step;

[0056] Step 8) Install the release film 6 onto the resin tank 3. Adjust the position of the print platform 5 on the print platform axis 4 based on the z-axis position of the release film 6 measured in step 6) until the upper surface of the lower end of the print platform 5 is in contact with the lower surface of the release film 6.

[0057] Step 9) Import the print model file used to implement the print positioning function and set the parameters for UV curing light source 8 used during the printing process. The illumination time for the first layer is 4 seconds, the illumination intensity is 100, and the liquid resin leveling time is 600 seconds. The illumination time for layers 2 to 6 is 3.5 seconds, the illumination intensity is 100, and the liquid resin leveling time is 400 seconds. The illumination time for layers 7 to 20 is 3 seconds, the illumination intensity is 100, and the liquid resin leveling time is 300 seconds. The illumination time for layers 20 and above is 3 seconds, the illumination intensity is 100, and the liquid resin leveling time is 200 seconds. Set the parameters used by the printing platform 5 during the printing process. After each layer is printed, the printing platform 5 descends a distance of 50μm and the descending speed is 2mm / s.

[0058] The print model used to achieve the print positioning function measures 48mm by 27mm in length and width, with a distance of 600μm from its highest plane to the print platform 5. The model has a recessed area in its center, with a distance of 300μm from the print platform 5. The recessed area measures 8mm by 8mm in length and width. The recessed area contains four symmetrical fixing clips 11 and a positioning pillar 12. The fixing clips 11 are two pairs of mutually inclined cylinders with a diameter of 0.1mm, each inclined at an angle of approximately 22°. The center points of the bottoms of each pair of symmetrical fixing clips 11 are spaced 4.8mm apart. The positioning pillar 8 is a vertical cylinder with a diameter of 0.1mm, perpendicular to the positioning print base 10. All of the above printed parts are made of resin, with their top surfaces being flush and 600μm from the top surface of the print platform 5.

[0059] Step 10) After the first print is complete, remove the release film 6 from the resin tank 3, remove the print platform 5 from the print platform shaft 4, and remove the printed part adhered to the upper surface of the lower end of the print platform 5. The printed part includes a positioning printing base 10 formed by liquid resin cured by UV curing light source 8, four fixing clips 11, and a positioning base column 12;

[0060] Step 11) Clean the printing platform 5 and the positioning printing base 10, four fixing clips 11, and positioning pillars 12 still attached to the printing platform 5 with 95% ethanol. Push the silicon hydroacoustic sensor base 13 horizontally into the square gap formed by the four fixing clips 11 and positioning pillars 12.

[0061] Step 12) Install the release film 6 onto the resin tank 3. Use a rubber-tipped dropper to add liquid resin to the resin tank 3 up to the scale line on the inner cavity of the resin tank 3. Repeat the operation in step 5). When the UV curing light source 8 forms a highly concentrated light spot on the release film 6, adjust the height of the resin tank 3 and move the z-axis position of the release film 6 upward by 0.1 mm.

[0062] Step 13) Turn off the UV curing light source 8, move the laser rangefinder 7 to be directly above the center point of the release film 6, and measure and record the z-axis position of the release film 6 at this time;

[0063] Step 14) Remove the release film 6 from the resin tank 3 and use a blade to gently scrape off the solid resin attached to the lower surface of the release film 6 due to the light spot formed by the UV curing light source 8 in the previous step;

[0064] Step 15) Mount the print platform 5 onto the print platform shaft 4 and the release film 6 onto the resin tank 3. Adjust the position of the print platform 5 on the print platform shaft 4 based on the z-axis position of the release film 6 measured in step 13) until the upper surface of the hydroacoustic sensor base 13 embedded in the first print on the print platform 5 is in contact with the lower surface of the release film 6.

[0065] Step 16) Import the printing model file for implementing the structural protection function and set the parameters of the UV curing light source 8 used during the printing process. The illumination time for the first layer is 4 seconds, the illumination intensity is 100, and the liquid resin leveling time is 600 seconds. The illumination time for layers 2 to 6 is 3.5 seconds, the illumination intensity is 100, and the liquid resin leveling time is 400 seconds. The illumination time for layers 7 to 20 is 3 seconds, the illumination intensity is 100, and the liquid resin leveling time is 300 seconds. The illumination time for layers 20 and above is 3 seconds, the illumination intensity is 100, and the liquid resin leveling time is 200 seconds. Set the parameters used by the printing platform 5 during the printing process. After each layer is printed, the printing platform 5 descends a distance of 50 μm and the descending speed is half of the setting for the first print, that is, 1 mm / s. This prevents the liquid resin in the resin tank 3 from flowing too fast and damaging the printed structure.

[0066] The printed model for structural protection includes biomimetic cilia 14 and a surrounding protective layer structure 15. The biomimetic cilia 14 have a radius of 175 μm and a height of 3.5 mm. The protective layer structure 15 has an inner radius of 6.3 mm, an outer radius of 6.5 mm, and a height of 3.5 mm.

[0067] Step 17) After the second print is completed, remove the printing platform 5 and the resin print adhered to the surface of the printing platform 5 and the underwater acoustic sensor base 13 embedded in the positioning printing base 10. The resin print includes the positioning printing base 10, four fixing clips 11, the positioning base 12, the bionic cilia 14 and the protective layer structure 15. After removing them, place them in 95% ethanol and shake them gently for one minute to wash off the residual liquid resin on the sample. Finally, remove them and wait for them to dry naturally.

[0068] Step 18) Use a thin blade to insert along the contact surface between the printing platform 5 and the printed positioning printing base 10, and completely scrape off the positioning printing base 10 and the four fixing clips 11 and the positioning column 12 on the positioning printing base 10, as well as the underwater acoustic sensor base 13 embedded between the fixing clips 11 and the positioning column 12, the bionic cilia 14 generated at the center of the cross cantilever beam of the underwater acoustic sensor base 13, and the protective layer structure 15 surrounding the periphery of the underwater acoustic sensor base 13. Use the tip of the knife to gently push the underwater acoustic sensor base 13 with the bionic cilia 14 in the center of the cross beam, and remove the bionic cilia 14 together with the underwater acoustic sensor base 13 from the side of the fixing clip 11 without the positioning column 12, so that the underwater acoustic sensor composed of the bionic cilia 14 and the underwater acoustic sensor base 13 can be obtained.

[0069] The above-described embodiments merely express the implementation methods of the present invention, but should not be understood as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. An integrated manufacturing system for underwater acoustic sensors based on bionic cilia, characterized in that: The integrated manufacturing system for underwater acoustic sensors includes a light-curing printing device for printing and two integrated manufacturing printing models for underwater acoustic sensors based on bionic cilia. The first integrated manufacturing printing model is used to implement a printing positioning function in the first printing and is defined as a printing positioning model. The second integrated manufacturing printing model is used to implement a structural protection function in the second printing and is defined as a structural protection model. The printing positioning model comprises a positioning printing base (10) of a plate-like structure, four fixing clips (11) for fixing an underwater acoustic sensor base (13) with a cross-beam structure on the positioning printing base (10), and a positioning base column (12) for positioning the center point of the underwater acoustic sensor base (13) at the center point of a recessed area, wherein a recessed area is provided at the exact center of the positioning printing base (10); wherein the underwater acoustic sensor base (13) is a component to be processed; The structural protection model includes bionic cilia (14) and a protective layer structure (15) surrounding the bionic cilia (14). The bionic cilia (14) and the annular protective layer structure (15) are of the same height. The bionic cilia (14) are vertically formed at the center of the cross beam of the underwater acoustic sensor base (13). The protective layer structure (15) is vertically formed on the positioning printing base (10). In the printing positioning model: The length and width of the positioning printing base (10) are the maximum length and width that can be printed by the light-curing printing device, and its height is twice the height of the hydroacoustic sensor base (13); The length of a recessed area in the center of the positioning printing base (10) is twice the length of the underwater acoustic sensor base (13), and the width of the recessed area is twice the width of the underwater acoustic sensor base (13). The center of the recessed area is four symmetrical fixing clips (11) and a positioning base column (12).

2. The integrated manufacturing system of underwater acoustic sensors based on bionic cilia according to claim 1 is characterized in that: In the printing positioning model: The fixing clips (11) are thin cylinders arranged obliquely with respect to the positioning printing base (10), and the spacing between the centers of the bottom circles of each pair of centrally symmetrical fixing clips (11) is equal to the width of the underwater acoustic sensor base (13) plus twice the cylinder diameter of the fixing clips (11); The positioning base column (12) is a thin cylinder perpendicular to the positioning printing base (10).

3. The integrated manufacturing system of underwater acoustic sensors based on bionic cilia according to claim 1 is characterized in that: By widening the central recessed area of ​​the positioning printing base (10) of the printing positioning model, the corresponding fixing clips (11) and the positioning base columns (12) are arranged in an array form, so that a plurality of underwater acoustic sensor bases (13) can be placed.

4. The integrated manufacturing system of underwater acoustic sensors based on bionic cilia according to claim 1 is characterized in that: The light-curing printing device comprises: a movable guide rail (1) at the bottom, a resin tank shaft (2) movable along the movable guide rail (1) in the y-axis direction, a resin tank (3) fixed on the resin tank shaft (2), a printing platform shaft (4) vertically fixed on the resin tank shaft (2), a printing platform (5) movable along the z-axis direction on the printing platform shaft (4), a release film (6) installed above the resin tank (3), a laser rangefinder (7) fixed directly above the center of the movable guide rail (1), a UV curing light source (8) and a real-time monitoring camera (9).

5. A method for integrated manufacturing of an underwater acoustic sensor based on bionic cilia, implemented based on the integrated manufacturing system of an underwater acoustic sensor according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1) aligning the center points of the printing platform (5), the release film (6) and the UV curing light source (8) in a vertical line; Step 2) changing the y-axis position of the release film (6) by moving the resin tank shaft (2), changing the x-axis position of the laser rangefinder (7) relative to the release film (6) by moving the laser rangefinder (7), and measuring the z-axis heights of the four corners of the release film (6) using the laser rangefinder (7); Step 3) Remove the release film (6), change the y-axis position of the printing platform (5) by moving the resin tank shaft (2), change the x-axis position of the laser rangefinder (7) relative to the printing platform (5) by moving the laser rangefinder (7), and use the laser rangefinder (7) to measure the z-axis heights of the four corners of the printing platform (5); Step 4) Install the release film (6) on the resin tank (3), add liquid resin to the resin tank (3) until the liquid surface is flush with the scale line of the inner cavity of the resin tank (3), at this time, the lower end of the printing platform (5) is completely immersed in the liquid resin, and the lower surface of the release film (6) is in contact with the upper surface of the liquid resin; Step 5) Turn on the UV curing light source (8), observe the pattern formed by the UV curing light source (8) on the release film (6) through the real-time monitoring camera (9), and change the position of the release film (6) on the z-axis by adjusting the height of the resin tank (3) until the UV curing light source (8) forms a highly concentrated light spot on the release film (6); Step 6) Turn off the UV curing light source (8), move the laser rangefinder (7) to the position directly above the center point of the release film (6), and measure and record the z-axis position of the release film (6) at this time; Step 7) Remove the release film (6) again and scrape off the solid resin attached to the lower surface of the release film (6); Step 8) Install the release film (6) onto the resin tank (3), and adjust the position of the printing platform (5) until the upper surface of the lower end of the printing platform (5) contacts the lower surface of the release film (6); Step 9) Import the printing model file for realizing the printing positioning function, set the illumination time and illumination intensity of the UV curing light source (8) during the printing process, set the descent speed and single descent distance of the printing platform (5) during the printing process, set the waiting time for the liquid resin to level after each descent of the printing platform (5), and perform the first printing; Step 10) After the first print is completed, the release film (6) is removed from the resin tank (3), the printing platform (5) is removed from the printing platform shaft (4), and the printed part adhered to the upper surface of the lower end of the printing platform (5), the printed part including a positioning printing base (10) formed by curing liquid resin by UV curing light source (8), four fixing clips (11) and a positioning base column (12); Step 11) Clean the printing platform (5) and the positioning printing base (10), four fixing clips (11) and positioning base column (12) on the printing platform (5), and push the silicon water acoustic sensor base (13) horizontally into the square gap formed by the four fixing clips (11) and the positioning base column (12); Step 12) Install the release film (6) onto the resin tank (3), add liquid resin to the resin tank (3) until the scale line of the inner cavity of the resin tank (3), repeat the operation of step 5), and when the UV curing light source (8) forms a highly concentrated light spot on the release film (6), adjust the height of the resin tank (3) and move the z-axis position of the release film (6) upward; Step 13) Turn off the UV curing light source (8), move the laser rangefinder (7) to the position directly above the center point of the release film (6), and measure and record the z-axis position of the release film (6) at this time; Step 14) removing the release film (6) from the resin tank (3) and removing the solid resin attached to the lower surface of the release film (6); Step 15) Install the printing platform (5) on the printing platform shaft (4), install the release film (6) on the resin tank (3), and adjust the position of the printing platform (5) on the printing platform shaft (4) according to the z-axis position of the release film (6) measured in step 13) until the upper surface of the water acoustic sensor base (13) embedded in the first print on the printing platform (5) contacts the lower surface of the release film (6); Step 16) Import the printing model file for realizing the structure protection function, set the illumination time and illumination intensity of the UV curing light source (8) during the printing process, set the single descent distance of the printing platform (5), set the waiting time for the liquid resin to level after each descent of the printing platform (5), set the descent speed of the printing platform (5) during the printing process to half of the setting of the first printing, so as to avoid the liquid resin in the resin tank (3) flowing too fast and damaging the printed structure, and perform the second printing; Step 17) After the second printing is completed, the printing platform (5) and the resin printed part adhered to the surface of the printing platform (5) and the underwater acoustic sensor base (13) embedded in the positioning printing base (10) are removed, wherein the resin printed part includes the positioning printing base (10), four fixing clips (11), a positioning base column (12), bionic cilia (14) and a protective layer structure (15); Step 18) The positioning printing base (10) and the structure on the surface of the positioning printing base (10) are completely scraped off, and the bionic cilia (14) are taken out together with the underwater acoustic sensor base (13) to obtain an underwater acoustic sensor composed of the bionic cilia (14) and the underwater acoustic sensor base (13).

6. The integrated manufacturing method of an underwater acoustic sensor based on bionic cilia according to claim 5 is characterized in that: The step 2) requires leveling the release film (6) until the height difference between any two corners on the z-axis is less than 20 μm.

7. The integrated manufacturing method of an underwater acoustic sensor based on bionic cilia according to claim 5 is characterized in that: The step 3) requires leveling the printing platform (5) until the height difference between any two corners on the z-axis is less than 20 μm.

8. The integrated manufacturing method of an underwater acoustic sensor based on bionic cilia according to claim 5 is characterized in that: In step 12), the z-axis position of the release film (6) is moved upward by 0.1 mm.

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