A position sensing device and tray delivery system suitable for harsh environments

Abstract

The utility model discloses a position sensing device and tray conveying system suitable for severe environment belongs to position sensor technical field, the utility model installs the seat and the swing board of hinged in the seat, wherein, the first end of swing board is connected with permanent magnet, the seat be equipped with hall probe, and the hall probe be located the below of permanent magnet, swing board under the natural state, because the gravity effect, the first end natural down, make permanent magnet and hall probe approach or contact each other, when the second end of swing board is affected by external force, force the first end on the table, make permanent magnet away from hall probe. The utility model discloses the hall sensor to the mobile position of planting tray is identified, has stronger anti outside environment interference ability, can be applicable to the multiple water, dust environment of hydroponic grass production system, guarantees the sensitivity of inductive effect.

Description

Technical Field

[0001] This utility model belongs to the field of position sensor technology, and more specifically, relates to a position sensing device and a tray conveying system suitable for harsh environments. Background Technology

[0002] Traditional forage cultivation methods are constrained by land resources, severely hindering the development of animal husbandry. In particular, some regions face problems such as scarce land resources, limited areas suitable for forage cultivation, and climatic limitations, resulting in a significant gap in the stable supply of high-quality feed throughout the year.

[0003] Hydroponics, as a special cultivation method for forage grasses, is not limited by land resources. It can utilize non-arable land space to significantly increase yield per unit area through vertical planting, thus saving arable land. At the same time, its growth cycle is controllable and significantly shortened, enabling batch continuous production and stable supply throughout the year, solving the seasonal and climatic constraints of traditional planting.

[0004] The applicant has been committed to the research and development of hydroponic forage technology. For example, in patent CN113273485A, the applicant disclosed a hydroponic plant production system. In this application, by setting a spirally extending support part on the main body of the production tower, the spirally extended support part forms a multi-layer structure in the vertical direction of the main body of the production tower, which can make full use of the vertical space and greatly improve the space utilization rate.

[0005] Patent CN114831010A discloses a seven-day forage planting and production equipment, which can achieve rapid maturation of forage in seven days.

[0006] For example, patent CN118556600A discloses a hydroponic forage production system. In this application, by optimizing the structure of the production system, fully automated production can be achieved from seed soaking and germination to forage growth and harvesting.

[0007] In the entire hydroponic forage production system, the movement of the planting trays needs to be identified at multiple points, typically using photoelectric sensors. For example, on the germination station production line, photoelectric sensors are used to detect and identify the position of the planting trays. Specifically, when the planting tray moves along the conveyor line to the bottom of the germination tank and is detected by the sensor, the discharge port of the germination tank opens, allowing the germinated seeds to fall into the planting tray. Then, the planting tray containing the germinated seeds is transferred to the grass tower for forage growth. However, due to the complexity of the environment in hydroponic forage production systems, which are generally characterized by high water and dust levels, the signals from photoelectric sensors are easily interfered with, leading to sensor malfunction and affecting the continuity of the entire production system. Utility Model Content

[0008] 1. The problem to be solved In view of at least some of the problems existing in the prior art, this utility model proposes a position sensing device and a tray conveying system suitable for harsh environments. Its purpose is to solve the problem that traditional photoelectric sensors are easily affected by external environmental interference, which leads to sensing failure.

[0009] 2. Technical Solution To solve the above problems, the technical solution adopted by this utility model is as follows: This utility model discloses a position sensing device suitable for harsh environments, comprising a mounting base and a swing plate hinged to the mounting base; wherein... The first end of the swing plate is connected to a permanent magnet, and the mounting base is equipped with a Hall probe, which is located below the permanent magnet. In its natural state, the first end of the swing plate naturally falls due to gravity, causing the permanent magnet to approach or contact the Hall probe. When the second end of the swing plate is subjected to an external force, the first end is forced to rise, causing the permanent magnet to move away from the Hall probe.

[0010] Furthermore, the mounting base is a hollow box-shaped structure with an opening on it for the swing plate to extend into and provide a certain swing space; the first end extends into the inner cavity of the mounting base through the opening, and the sensing element at the end of the Hall probe is located in the inner cavity of the mounting base.

[0011] Furthermore, the mounting base and the swing plate are rotatably connected by a pin, and the pin is equipped with a cotter pin.

[0012] Furthermore, the swing plate is provided with lugs on both sides; the lugs and the front and rear cover plates of the mounting base are provided with mounting holes for mounting pins.

[0013] Furthermore, the rear cover plate of the mounting base has extension sections at both ends, and the extension sections have assembly holes for mounting with the frame; the base plate of the mounting base has assembly holes for mounting Hall probes.

[0014] Furthermore, the permanent magnet is disposed on the lower surface of the swing plate via a connector.

[0015] Furthermore, the connecting component includes a bolt; wherein the bolt passes sequentially through a countersunk hole on the permanent magnet and an assembly hole on the swing plate before being connected to a nut.

[0016] Furthermore, the sensing element or permanent magnet is provided with a protective pad.

[0017] Furthermore, a connection hole is provided on the swing plate near the Hall probe, and a counterweight is connected to the connection hole.

[0018] The present invention provides a material tray conveying system, including a frame and a conveyor line mounted on the frame, wherein the side of the frame is provided with a position sensing device suitable for harsh environments as described above.

[0019] 3. Beneficial effects Compared with the prior art, the beneficial effects of this utility model are as follows: (1) The present invention provides a position sensing device suitable for harsh environments. It uses a Hall sensor to identify the movement position of the planting tray. Compared with traditional photoelectric sensors, it has stronger resistance to external environmental interference and can be used in the watery and dusty environment of hydroponic forage production systems, ensuring the sensitivity of the sensing effect. At the same time, through the hinged setting of the swing plate, the Hall sensor is turned on and off by utilizing the gravity difference between the two ends of the swing plate. Compared with the traditional spring structure, it is not only simpler in structure, but also has a good service life.

[0020] (2) The position sensing device of this utility model is suitable for harsh environments. The mounting base adopts a hollow box structure, and the permanent magnet and sensing element are placed in the inner cavity of the mounting base, which is equivalent to adding a layer of physical protection, which can further ensure that the Hall sensor is protected from direct corrosion by water vapor, dust and impurities in the external environment.

[0021] (3) The position sensing device of this utility model is suitable for harsh environments. A protective pad is provided on the sensing element of the Hall sensor, which can effectively avoid direct collision between the sensing element and the permanent magnet, thereby helping to extend the service life of the Hall sensor.

[0022] (4) A position sensing device suitable for harsh environments according to this utility model can add a counterweight block with freely controllable weight to one end of the swing plate to improve the stability of the reset; at the same time, the swing plate without the counterweight block has very small swing resistance, so even if the transported plate is a very light plate, pressing down the swing plate will not affect the posture of the plate, thus improving the stability of the plate transport. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a position sensing device suitable for harsh environments according to the present invention; Figure 2 This is a schematic diagram of the mounting base in this utility model; Figure 3 This is a schematic diagram of the swing plate in this utility model; Figure 4 This is a schematic diagram of the Hall probe in this utility model; Figure 5 This is a schematic diagram of the assembly between the permanent magnet and the swing plate in this utility model; Figure 6 This is a schematic diagram of the structure of a material tray conveying system according to the present invention.

[0024] In the diagram: 100, mounting base; 101, clearance opening; 110, front cover plate; 120, rear cover plate; 130, top plate; 140, bottom plate; 150, side plate; 160, extension section; 200, swing plate; 210, first end; 220, second end; 230, lug; 300. Permanent magnet; 400. Hall effect sensor; 410. Sensing element; 420. Protective pad; 500, Pin; 510, Cotter pin; 600, Connector; 610, Bolt; 620, Nut; 700, frame; 800, conveyor line; 900, planting tray. Detailed Implementation

[0025] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] The present invention will be further described below with reference to specific embodiments.

[0028] like Figure 1 As shown, this embodiment of a position sensing device suitable for harsh environments includes a mounting base 100 and a swing plate 200. The swing plate 200 is hinged to the mounting base 100, allowing it to swing around the hinge point. A Hall sensor 400 is mounted on the mounting base 100; a permanent magnet 300 is located at one end of the swing plate 200, positioned above the Hall sensor 400. For ease of description below, the end of the swing plate 200 connected to the permanent magnet 300 is defined as the first end 210, and the other end as the second end 220.

[0029] In this embodiment, a position sensing device suitable for harsh environments is described. In its natural state, the first end 210 of the swing plate 200, which is connected to the permanent magnet 300, will naturally fall due to gravity, causing the permanent magnet 300 to approach or contact the Hall probe 400. When the planting tray 900 moves to the second end 220 and applies a downward force to it, the first end 210 is forced to rise, causing the permanent magnet 300 to move away from the Hall probe 400.

[0030] Compared to traditional photoelectric sensors that detect changes in the position of the planting tray 900 by emitting and receiving light, in this embodiment, the Hall probe 400 identifies the movement of the planting tray 900 by sensing changes in magnetic field strength. This method is less susceptible to interference from moisture and dust, making it better suited to the complex environment of hydroponic forage production systems and ensuring the sensitivity of the detection results.

[0031] Furthermore, compared to the traditional spring-compression structure, which has its limits and may malfunction after too many resets, this embodiment utilizes the hinged design of the swing plate 200 and the gravity difference between its two ends to achieve the on / off operation of the Hall probe 400. This not only simplifies the structure but also ensures a longer service life.

[0032] In some embodiments, the mounting base 100 adopts a hollow box structure, housing the key components of the Hall probe 400 and the permanent magnet 300 within the inner cavity of the mounting base 100. This is equivalent to adding a layer of physical protection to the Hall probe 400 and the permanent magnet 300, preventing them from being directly corroded by moisture, dust, and impurities in the external environment, thereby further extending their service life.

[0033] Specifically, refer to Figure 3 As shown, the mounting base 100 is formed by a front cover plate 110, a rear cover plate 120, a top plate 130, a bottom plate 140, and a side plate 150. A clearance opening 101 is provided at the junction of one side plate 150 and the top plate 130, through which the first end 210 of the swing plate 200 extends into the inner cavity of the mounting base 100. Simultaneously, the clearance opening 101 also provides a certain amount of swing space for the swing plate 200.

[0034] Specifically, in this embodiment, for ease of processing, the left side of the mounting base 100 (with...) Figure 2 (Based on the paper orientation) no side plate 150 is provided. That is, the left side opening of the entire mounting base 100 is to provide sufficient swing space for the swing plate 200.

[0035] In some implementations, the Hall probe 400 is encased within a plastic film to further enhance its anti-interference capabilities and suitability for use in harsh environments.

[0036] In some embodiments, the mounting base 100 and the swing plate 200 are rotatably connected by a pin 500 to reduce the frictional resistance when the swing plate 200 swings. Meanwhile, the pin 500 is equipped with a cotter pin 510 to prevent the pin 500 from falling off after repeated rotations.

[0037] Specifically, refer to Figure 3 As shown, the swing plate 200 has lugs 230 on both sides, and the lugs 230 and the corresponding positions of the front cover plate 110 and the rear cover plate 120 have mounting holes for the pin 500 to pass through. Preferably, the lugs 230 are located at the middle position of the swing plate 200 to ensure the left and right weight balance of the pin 500 to the greatest extent, so as to reduce the swing resistance of the swing plate 200.

[0038] Meanwhile, a mounting hole for mounting the Hall probe 400 is provided on the base plate 140. The sensing element 410 at the top end of the Hall probe 400 can enter the inner cavity of the mounting base 100 through this mounting hole. Preferably, the mounting hole is an oblong groove to allow for left and right adjustment of the Hall probe 400.

[0039] like Figure 4 As shown, in some embodiments, a protective pad 420 is provided on the top of the sensing element 410 to avoid direct collision between the sensing element 410 and the permanent magnet 300, thereby helping to ensure the service life of the Hall probe 400. Of course, the protective pad 420 can also be provided on the permanent magnet 300, which can also achieve the same anti-collision effect.

[0040] In addition, to facilitate the installation of the entire sensing device on the frame 700 of the tray conveying system, extensions 160 are provided at both ends of the rear cover plate 120. Each extension 160 has mounting holes for self-tapping screws to pass through. Similarly, these mounting holes can also be oblong holes to facilitate fine-tuning of the mounting position of the mounting base 100.

[0041] In some embodiments, the permanent magnet 300 is disposed on the lower surface of the oscillating plate 200 via a connector 600. The connector 600 can be adhesive or a fastener from the prior art, such as a rivet or screw.

[0042] Specifically, in this embodiment, such as Figure 5As shown, the connector 600 is a bolt 610, which passes through the countersunk hole on the permanent magnet 300 and the mounting hole on the swing plate 200 in sequence, and is then connected to a nut 620. The connector 600 uses a matching bolt 610 and nut 620, which on the one hand ensures a firm connection between the permanent magnet 300 and the swing plate 200; on the other hand, the bolt 610 and nut 620 can be used as a counterweight to ensure that, without the action of external force, the first end 210 of the swing plate 200 connected to the permanent magnet 300 can fall naturally and come into contact with the sensing element 410 of the Hall probe 400.

[0043] like Figure 6 As shown, this embodiment also provides a tray conveying system, which includes a frame 700 and a conveyor line 800 disposed on the frame 700. Meanwhile, the aforementioned position sensing device is provided on the side of the frame 700.

[0044] In this embodiment, a material tray conveying system operates such that, during operation, the planting tray 900 moves synchronously with the conveyor line 800. Before the planting tray 900 reaches the position of the sensing device, the first end 210 of the swing plate 200 is in a natural downward state, and the permanent magnet 300 is in contact with the Hall probe 400. When the planting tray 900 moves to the position of the sensing device, it begins to apply a downward gravitational force to the raised second end 220, thereby driving the first end 210 onto the platform, causing the permanent magnet 300 to gradually move away from the Hall probe 400. At this time, the Hall probe 400 can sense the planting tray 900 based on the change in magnetic field strength.

[0045] It is worth mentioning that when the planting tray 900 moves on the conveyor line 800, the end of the planting tray 900 needs to extend beyond the conveyor line 800 to facilitate the subsequent pressing down of the second end 220. Simultaneously, if there is a significant difference in the weight of the first end 210 and the second end 220, a connection hole can be provided on the swing plate 200 near the sensing element 410, and a counterweight can be installed in the connection hole. This ensures that, under natural conditions, the first end 210 is in a downward state, allowing the Hall probe 400 to contact the permanent magnet 300; and that the weight of the planting tray 900 and the seeds within it is sufficient to tilt the downward-falling first end 210, thus separating the Hall probe 400 and the permanent magnet 300 by a certain distance.

[0046] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A position sensing device suitable for harsh environments, characterized in that: Includes a mounting base (100) and a swing plate (200) hinged to the mounting base (100); wherein, The first end (210) of the swing plate (200) is connected to a permanent magnet (300), and the mounting base (100) is provided with a Hall probe (400), which is located below the permanent magnet (300); In its natural state, the first end (210) of the swing plate (200) naturally falls due to gravity, causing the permanent magnet (300) and the Hall probe (400) to approach or contact each other; when the second end (220) of the swing plate (200) is subjected to external force, the first end (210) is forced to rise, causing the permanent magnet (300) to move away from the Hall probe (400).

2. A position sensing device suitable for harsh environments according to claim 1, characterized in that: The mounting base (100) is a hollow box-shaped structure with a clearance opening (101) on it for the swing plate (200) to extend into and provide a certain swing space; the first end (210) extends into the inner cavity of the mounting base (100) through the clearance opening (101), and the sensing element (410) at the end of the Hall probe (400) is located in the inner cavity of the mounting base (100).

3. A position sensing device suitable for harsh environments according to claim 1 or 2, characterized in that: The mounting base (100) and the swing plate (200) are rotatably connected by a pin (500), and the pin (500) is equipped with a cotter pin (510).

4. A position sensing device suitable for harsh environments according to claim 3, characterized in that: The swing plate (200) has lugs (230) on both sides; the lugs (230) and the front and rear cover plates of the mounting base (100) are provided with mounting holes for mounting pins (500).

5. A position sensing device suitable for harsh environments according to claim 1, characterized in that: The rear cover plate (120) of the mounting base (100) has extension sections (160) at both ends, and the extension sections (160) have assembly holes for mounting with the frame (700); the base plate (140) of the mounting base (100) has assembly holes for mounting the Hall probe (400).

6. A position sensing device suitable for harsh environments according to claim 3, characterized in that: The permanent magnet (300) is disposed on the lower surface of the swing plate (200) via a connector (600).

7. A position sensing device suitable for harsh environments according to claim 6, characterized in that: The connector (600) includes a bolt (610); wherein the bolt (610) passes through the countersunk hole on the permanent magnet (300) and the mounting hole on the swing plate (200) in sequence and is connected to a nut (620).

8. A position sensing device suitable for harsh environments according to claim 2, characterized in that: The sensing element (410) or permanent magnet (300) is provided with a protective pad (420).

9. A position sensing device suitable for harsh environments according to claim 1, characterized in that: The swing plate (200) has a connection hole near the Hall probe (400), and a counterweight is connected to the connection hole.

10. A tray conveying system, comprising a frame (700) and a conveyor line (800) disposed on the frame (700), characterized in that: The side of the frame (700) is provided with a position sensing device suitable for harsh environments as described in any one of claims 1-9.

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