Wheel brush type sampling device simulating feeding characteristic of bamboo weevil

Abstract

The invention discloses a wheel brush type detection sample device simulating the feeding characteristic of bamboo weevil. The wheel brush type detection sample device comprises a mounting shell, a guide cylinder, a middle rotating shaft, an annular brush disc, soft sampling bristles and hard sampling bristles. A double-wheel brush counter-rotating structure is adopted, so that the sampling process is stable and continuous, and the same sampling area can be repeatedly sampled for multiple times; meanwhile, a counter-rotating structure is utilized, so that the counter-acting force of the sampling device to a detection machine in the sampling process is remarkably reduced, and the working stability in a microgravity environment is effectively improved; the concave soft sampling bristles and the convex hard sampling bristles are adopted, so that the dual functions of brushing and sweeping and cutting in the sampling process can be realized, rock samples with different hardness can be coped with at the same time, and the adaptability and durability of the wheel brush type sampler in a complex sampling environment are expected to be improved.

Description

Technical Field

[0001] The invention relates to a wheel brush type sampling device, in particular to a wheel brush type sampling device imitating the feeding characteristics of a bamboo weevil, and belongs to the technical field of space sampling. Background Art

[0002] Asteroids are rich in mineral resources, such as metal elements and rare minerals. These resources are of great value to space exploration and can effectively alleviate the pressure of future resource depletion on Earth. Space resource development is in the transition stage from proof of concept to engineering practice. Research on various sampling technologies and implementation strategies lays the foundation for the efficient acquisition of space resources.

[0003] In the prior art, 1) a touch sampler suitable for extraterrestrial bodies disclosed in announcement number CN111947965A includes: a sampling shroud, a pneumatic impact rock-breaking mechanism, a flexible spring, etc.; the sampling shroud is located at the bottom of the touch sampler, the gas excitation nozzle is located on the inner side of the sampling shroud, the pneumatic impact rock-breaking mechanism is installed on the inner side of the sampling shroud, the flexible spring is installed on the upper end of the sampling shroud, the pneumatic expansion mechanism is installed on the upper end of the flexible spring, the sample channel is installed in the pneumatic expansion mechanism, one end is connected to the internal cavity of the sampling shroud, and the other end is connected to the sample container; the sealed door is installed in the sample channel, and the sample container is fixed to the upper end of the pneumatic expansion mechanism. The surface of the star body is crushed and peeled by using a pneumatic impact rock-breaking mechanism, and the surface sample is blown into the sample container through gas excitation and transmission to complete the recovery. It has the characteristics of short sampling time, strong adaptability to the star table, repeatable sampling, and reliable sampling; 2) A grab sampling device disclosed in announcement number CN102410940A includes: a driving device, an input gear is provided on its output shaft; an internal transmission shaft is provided with an internal transmission shaft input gear meshing with the input gear, and an internal transmission shaft output gear is also provided on it; an internal pulling shaft is provided with an axial limit The invention comprises an inner pull shaft input gear, which meshes with the inner drive shaft output gear and has a plurality of racks at its other end, threadedly engaged with the inner pull shaft; an outer cylinder, which is sleeved onto the outer side of the inner pull shaft; a sampling tube, which is disposed at the lower end of the outer cylinder, into which the racks extend; and claws, which are rotatably mounted on the sampling tube and have the same number of racks as the inner drive shaft output gear. The claws are equipped with rotating gears that mesh with the racks, thus resolving the problem that spiral sampling devices cannot collect high-density or low-density materials such as pellets and wood chips. Currently, mainstream sampling technologies have achieved certain results in their respective applications, but they still have many shortcomings: limited adaptability to sampling objects, often only suitable for samples of specific particle size or hardness, lacking compatibility; sampling structures are generally complex, with many moving parts and a high risk of failure; sampling lacks continuity, often only being performed once, and the sampled samples are not representative enough. Therefore, a new sampling device is urgently needed that can simultaneously meet the sampling task requirements of high adaptability and high reliability.

[0004] Research has shown that many organisms in nature are adept at drilling and digging for food or building nests in diverse media. The bamboo weevil is a prime example. Its mouthparts have a pair of sharp, hard teeth at the end that rotate and engage like a drill bit, cutting and drilling holes in the bamboo. Simultaneously, by constantly rotating its head and mouthparts, it expels the excavated wood chips and consumes the soft interior. This "drilling and eating" ability is due to its mouthparts' ability to simultaneously perform both cutting and transporting tasks. Inspired by this, sampler design could develop towards a single-machine, multifunctional design, combining cutting and sweeping functions to improve sampling efficiency.

[0005] Therefore, it is of great strategic significance to combine biomimetic technology with space sampling engineering, explore new composite and bionic samplers, and realize efficient and stable sampling of asteroid surface sampling missions. Based on this, this application proposes a wheel brush sampling device that imitates the feeding characteristics of bamboo weevils. Summary of the Invention

[0006] The purpose of the present invention is to provide a wheel brush type sampling device that imitates the feeding characteristics of bamboo weevils in order to solve at least one of the above technical problems.

[0007] The present invention achieves the above-mentioned object through the following technical solutions: a wheel brush type sampling device imitating the feeding characteristics of bamboo weevils, comprising a mounting shell and a guide tube mounted above the mounting shell, and a wheel brush type sampler is provided at an opening below the mounting shell; The wheel brush sampler includes a central rotating shaft and an annular brush disc mounted on the central rotating shaft. A sampling bristle unit is mounted on the edge of the annular brush disc. The shape of the sampling bristle unit is the mouthpart structure of a bamboo weevil. The sampling bristle unit is divided into soft sampling bristles and hard sampling bristles, and the soft sampling bristles are evenly distributed and connected to the edge of the annular brush plate, and the hard sampling bristles are respectively connected to the outer ends of the soft sampling bristles.

[0008] As a further solution of the present invention: the wheel brush sampler adopts a double wheel brush counter-rotating structure, and both wheel brush samplers are driven by a motor.

[0009] As a further solution of the present invention: the soft sampling bristles and hard sampling bristles of the sampling brush unit constitute soft and hard composite sampling bristles composed of soft and hard fibers. The soft sampling bristles are used to sweep small sample particles, and the hard sampling bristles are used to cut hard rock samples.

[0010] As a further solution of the present invention: the hard sampling bristles adopt an outward convex arc shape; the soft sampling bristles adopt an inward concave arc shape.

[0011] As a further solution of the present invention: the soft sampling bristles and the hard sampling bristles can both rotate at a certain angle relative to the annular brush disk, and the soft sampling bristles and the hard sampling bristles are retracted into a closed structure when the mobile detection machine performs the detection task; the soft sampling bristles and the hard sampling bristles gradually open when the mobile detection machine performs the sampling task.

[0012] The beneficial effects of the present invention are: 1. The present invention adopts a dual-wheel counter-rotating structure, which makes the sampling process smooth and continuous, and can perform repeated sampling on the same sampling area. At the same time, the counter-rotating structure significantly reduces the reaction force of the sampling device on the detection machine during the sampling process, effectively improving the stability of operation in a microgravity environment. 2. Compared with traditional wheel-brush sampling devices, this sampling device imitates the mouthpart structure of bamboo weevils with hard teeth and flexible maxillary grooves. It is designed with a soft and hard composite sampling bristles, specifically concave soft sampling bristles and convex hard sampling bristles. It can achieve the dual functions of "brushing and cutting" during the sampling process, and can handle rock samples of different hardnesses at the same time. It is expected to improve the adaptability and durability of wheel-brush samplers in complex sampling environments. 3. Incorporating the feeding mechanism of bamboo weevils, a sampling bristle structure with adjustable opening and closing angles was designed around the edge of the circular brush disc. When the mobile detector is performing a detection task, the bristles are retracted into the shell, forming a closed structure. During sampling, the bristles gradually open and rotate in coordination to complete the designated sampling task, potentially improving the detector's efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional schematic diagram of the present invention; Figure 2 Schematic diagram of a three-dimensional model of the wheel brush sampler of the present invention; Figure 3 This is a kinetic diagram of the cutting process of the outward convex hard sampling bristles of the present invention; Figure 4 This is a dynamic diagram of the brushing process of the concave soft sampling bristles of the present invention; Figure 5 This is a schematic diagram of adjusting the opening and closing angles of the sampling bristles of the present invention; Figure 6 This is a schematic diagram of an application scenario of the wheel brush sampling device of the present invention; In the figure: 1. Installation shell; 2. Guide tube; 3. Middle rotating shaft; 4. Annular brush plate; 5. Soft sampling bristles; 6. Hard sampling bristles. DETAILED DESCRIPTION

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0015] Example 1, as Figures 1 to 6 As shown, a brush-type sampling device imitating the feeding characteristics of bamboo weevils comprises a mounting shell 1 and a guide tube 2 mounted above the mounting shell 1, and a brush-type sampler is provided at the opening below the mounting shell 1; The wheel brush sampler includes a central rotating shaft 3 and an annular brush disc 4 mounted on the central rotating shaft 3. A sampling bristle unit is mounted on the edge of the annular brush disc 4. The shape of the sampling bristle unit is the mouthpart structure of a bamboo weevil. The sampling bristle unit is divided into soft sampling bristles 5 and hard sampling bristles 6, and the soft sampling bristles 5 are evenly distributed and connected to the edge of the annular brush plate 4, and the hard sampling bristles 6 are respectively connected to the outer ends of the soft sampling bristles 5.

[0016] Embodiment 2. In addition to all the technical features of embodiment 1, this embodiment also includes: the wheel brush sampler adopts a double-wheel brush counter-rotating structure, and the two wheel brush samplers are driven by a motor. Under the drive of the motor, the annular brush disks 4 of the two wheel brush samplers rotate in opposite directions, forming a fan-shaped sweeping area under the mounting shell 1. The resultant force will sweep the sample particles located in the middle area of ​​the fan to the guide tube 2, thereby enabling the sample particles to reach the collection container.

[0017] The soft sampling bristles 5 and hard sampling bristles 6 of the sampling brush unit constitute a soft-hard composite sampling bristle composed of soft and hard fibers. The soft sampling bristles 5 are used to sweep small sample particles, and the hard sampling bristles 6 are used to cut hard rock samples. This design imitates the composite function of "biting + sweeping" when the bamboo weevil feeds.

[0018] The hard sampling bristles 6 are in the shape of an outward convex arc to imitate the hard teeth in the mouthparts of the bamboo weevil; the soft sampling bristles 5 are in the shape of an inward concave arc to simulate the grooves in the upper jaw of the mouthparts of the bamboo weevil.

[0019] Both the soft sampling bristles 5 and the hard sampling bristles 6 can rotate at a certain angle relative to the annular brush disk 4, and the soft sampling bristles 5 and the hard sampling bristles 6 are retracted into a closed structure when the mobile detection machine performs the detection task; the soft sampling bristles 5 and the hard sampling bristles 6 gradually open when the wheel mobile detection machine performs the sampling task, which enables the bristles to rotate in coordination to complete the cutting and sweeping actions to imitate the feeding action of the bamboo weevil: lift the front legs, tilt the head, and rotate the lower jaw around the edge of the gnawing hole, so that the mouthparts of the bamboo weevil imitated by the soft sampling bristles 5 and the hard sampling bristles 6 are embedded like a drill bit, and at the same time the base of the mouthparts is bent and stretched to form a pumping effect, forming a sampling bristle structure with adjustable opening and closing angles, thereby improving the working efficiency of the wheel brush sampler.

[0020] Example 3, as Figure 3 and Figure 4 As shown, in addition to all the technical features of the first embodiment, this embodiment also includes: the soft sampling bristles 5 and the hard sampling bristles 6 adopt a bionic microstructure, imitating the hard serrations and tough mandibular grooves on the surface of the bamboo weevil's mouthparts. Therefore, the hard sampling bristles 6 are designed to adopt a convex shape, while the soft sampling bristles 5 adopt a concave shape. Specifically, the hard sampling bristles 6 are convex arc-shaped.

[0021] like Figure 3 As shown, the cutting force of the hard sampling bristles 6 on the sample particles that have been cut off is F NCan be decomposed into centrifugal force F 1 and circumferential force F 2. The cut sample particles will be F 1, a positive pressure is generated on the surface of the hard sample to be cut. At this time, the surface of the hard sample to be cut will react to the sample particles that have been cut with a force of the same size but in the opposite direction. F 3. Make sure that the sample particles that have been cut do not move in the centripetal direction. At the same time, due to the circumferential force F 2. Make the sample particles that have been cut do circumferential motion, forcing the sample particles that have been cut to produce an opposite movement trend on the surface of the hard sample to be cut. Thus, the surface of the hard sample to be cut produces a circumferential force on the sample particles that is the same as the circumferential force. F 2. A frictional resistance in opposite directions F u , which prevents the movement of the cut sample particles, so that the cut sample particles cannot move along the cutting force. F N Therefore, a differential effect is formed between the cut sample particles and the hard sampling bristles 6, making the hard sampling bristles 6 have a stronger cutting effect on the cut sample particles. Therefore, the sample particles cut off the surface of the sample to be cut gradually increase, and the volume gradually decreases. Assuming that the density remains unchanged, the mass of the sample particles is significantly reduced, which is conducive to the wheel brush type sampling device to sweep them to complete the sampling task. The soft sampling bristles 5 are specifically concave arc-shaped, and the working principle is as follows Figure 4 As shown, the sample particles to be swept are subjected to the squeezing force of the soft sampling brush 5 perpendicular to its surface. F , the extrusion force F Decomposed into the force component along the collecting direction of the guide tube 2 F 4 and circumferential direction components F 5. The decomposition results show that the force F 4 points to the direction of guide tube 2, force F 5 points to the fan-shaped sweep in the middle area, and finally the sample particles swept by the soft sampling bristles 5 are forced to be squeezed in the collection direction of the guide tube 2, which is expected to reduce the probability of sample particles leaking out and is conducive to the efficient operation of the sampling device.

[0022] Example 4, as Figure 5 As shown, in addition to all the technical features of the first embodiment, this embodiment also includes: a sampling bristle structure with adjustable opening and closing angles. As a derivative device of the present invention, in order to facilitate analysis, four pieces of soft and hard composite sampling bristles are taken as an example. Figure 5As shown, when the brush discs rotate in opposite directions, the sampling bristles can adjust their opening and closing ranges to a certain angle. When the mobile detection machine is performing a mobile detection task, the bristles are closed, facilitating efficient movement of the detector. When the mobile detection machine is performing a sampling task, the bristles gradually open and rotate in coordination, completing cutting and sweeping actions in the designated sampling area, mimicking the feeding action of the bamboo weevil: "It raises its forelegs, tilts its head, and rotates its lower jaw around the edge of the gnawing hole, allowing the mouthparts to penetrate like a drill bit. Simultaneously, the base of the mouthparts bends and stretches to create a pumping action." This bionic design is expected to improve the detector's working efficiency.

[0023] like Figure 6 As shown, a wheel brush sampling device imitating the feeding characteristics of bamboo weevils is pre-installed under the mobile detection machine. When the wheel brush sampling device approaches the designated sampling area, the soft and hard composite sampling bristles 5 and hard sampling bristles 6 gradually open, and the running motor controls the central rotating shaft 3 to drive the annular brush disc 4 to start counter-rotating at a certain speed. The corresponding control strategy is designed to make the speed adaptively adjusted according to the characteristics of the rock sample to be collected. The soft sampling bristles 5 and hard sampling bristles 6 continuously sweep the surface of the area to be sampled, and the loose and soft sample particles are drawn into the fan-shaped sweeping area below the shell 1. Under the action of centrifugal force, they enter the collection container along the guide tube 2. The sample collection container adopts a detachable sealing structure. When the container is full or the predetermined sampling time is completed, the motor gradually decelerates, and at the same time, the soft sampling bristles 5 and hard sampling bristles 6 are retracted, and the detection machine moves to the next sampling area for sampling operation. If the sampling device encounters a large hard rock sample during the collection process and cannot be directly swept and collected, the innovatively designed soft-hard composite soft sampling brush 5 and hard sampling brush 6 of the present invention can achieve the dual functions of "brushing + cutting", that is, the differential effect formed between the cut sample particles and the hard sampling brush 6 is utilized to continuously cut out more sample particles with smaller volume and mass on the surface of the hard rock sample to be cut, which are rotated and swept in the direction of the guide tube 2 under the action of the soft sampling brush 5 and finally enter the collection container. After the sampling work is completed, the soft sampling brush 5 and the hard sampling brush 6 are retracted into the shell 1 and wait for the next sampling task.

[0024] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0025] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A brush-type sampling device imitating the feeding characteristics of bamboo weevils, comprising a mounting housing (1) and a guide tube (2) mounted above the mounting housing (1), characterized in that: A wheel brush type sampler is provided at the opening below the mounting shell (1); The wheel brush type sampler comprises a central rotating shaft (3) and an annular brush disc (4) mounted on the central rotating shaft (3); a sampling bristle unit is mounted on the edge of the annular brush disc (4); and the sampling bristle unit is shaped like a bamboo weevil mouthpart structure; The sampling bristle unit is divided into soft sampling bristles (5) and hard sampling bristles (6), and the soft sampling bristles (5) are evenly distributed and connected to the edge of the annular brush disc (4), and the hard sampling bristles (6) are respectively connected to the outer ends of the soft sampling bristles (5).

2. The wheel brush type sampling device according to claim 1, characterized in that: The wheel brush type sampler adopts a double wheel brush counter-rotating structure, and both of the wheel brush type samplers are driven by a motor.

3. The wheel brush type sampling device according to claim 1, characterized in that: The soft sampling bristles (5) and the hard sampling bristles (6) of the sampling bristle unit constitute a soft-hard composite sampling bristle composed of soft and hard fibers. The soft sampling bristles (5) are used to sweep fine sample particles, and the hard sampling bristles (6) are used to cut hard rock samples.

4. The wheel brush type sampling device according to claim 1, characterized in that: The hard sampling bristles (6) are in the shape of an outward convex arc; the soft sampling bristles (5) are in the shape of an inward concave arc.

5. The wheel brush type sampling device according to claim 1, characterized in that: The soft sampling bristles (5) and the hard sampling bristles (6) can both be angularly rotated relative to the annular brush disc (4), and the soft sampling bristles (5) and the hard sampling bristles (6) are retracted into a closed structure when the mobile detection machine performs a detection task; the soft sampling bristles (5) and the hard sampling bristles (6) gradually open when the mobile detection machine performs a sampling task.

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