Capacitive high-precision weighing sensor

Abstract

The utility model discloses a capacitive high-precision weighing sensor, and relates to the technical field of weighing sensors. The capacitive high-precision weighing sensor comprises a capacitive weighing sensor body and a hollow guide cover, the upper surface of the capacitive weighing sensor body is movably connected with a moving pole, and the guide cover is fixedly connected to the upper side of the outer wall of the capacitive weighing sensor body. Supporting balls are embedded into the inner wall of the guide cover, and an upper supporting ring is movably inserted into an inner cavity of the guide cover. Through the supporting effect of the guide cover on the upper supporting ring, the contact area between the guide cover and the upper supporting ring is large, so that the upper supporting ring is not liable to tilt relative to the guide cover, the moving pole is not liable to tilt and deform due to pressure, and the capacitive weighing sensor body is accurate in measurement. And through cooperation between the sliding grooves and the supporting balls, the upper supporting ring moves more smoothly relative to the guide cover.

Description

Technical Field

[0001] The utility model relates to the technical field of weighing sensors, in particular to a capacitive high-precision weighing sensor. Background Art

[0002] A weighing sensor is actually a device that converts mass signals into measurable electrical signals. When using a sensor, you should first consider the actual working environment of the sensor.

[0003] A capacitive sensor is a capacitor with variable parameters. Its function is to convert the change of the measured value into a change of capacitance, based on which the weight is measured.

[0004] With the development of electronic and computer technologies, the shortcomings of capacitive sensors, such as susceptibility to interference and the influence of distributed capacitance, have been continuously overcome. They are now widely used in non-electrical measurement and automatic detection. They can measure parameters such as pressure, displacement, speed, acceleration, thickness, liquid level, humidity, vibration, and component content. Capacitive sensors have a bright future.

[0005] However, when the capacitive weighing sensor is in use, the upper weight is unevenly distributed on the upper part of the capacitive weighing sensor, and the moving pole of the capacitive weighing sensor is prone to tilting, resulting in friction between the moving pole and the sensor housing, affecting the gravity measurement results and easily causing the moving pole to be damaged. Utility Model Content

[0006] (1) Technical problems solved

[0007] In response to the shortcomings of the existing technology, the utility model provides a capacitive high-precision weighing sensor, which solves the problem that when the upper weight is unevenly distributed on the upper part of the capacitive weighing sensor, the moving pole of the capacitive weighing sensor is prone to tilting, resulting in friction between the moving pole and the sensor housing, affecting the gravity measurement results, and easily causing the moving pole to be damaged.

[0008] (2) Technical solution

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: A capacitive high-precision weighing sensor, comprising:

[0010] A capacitive weighing sensor body, wherein the upper surface of the capacitive weighing sensor body is movably connected to a movable pole;

[0011] The guide cover is hollow and fixedly connected to the upper side of the outer wall of the capacitive weighing sensor body. The inner wall of the guide cover is embedded with supporting balls. The inner cavity of the guide cover is movably plugged with an upper supporting ring. The upper supporting ring is fixedly connected to the top of the moving pole. A sliding groove corresponding to the position of the supporting ball is longitudinally opened on the outer wall of the upper supporting ring. The supporting ball is slidably connected to the sliding groove. An upper connecting plate is provided at the upper end of the outer wall of the upper support ring.

[0012] Preferably, a fixed connection edge is provided on the lower side of the outer wall of the capacitive weighing sensor body.

[0013] Preferably, an external thread is provided on the upper side of the outer wall of the capacitive weighing sensor body, and an internal thread matching the external thread is provided on the lower side of the inner wall of the guide cover.

[0014] Preferably, the inner cavity of the upper support ring is provided with a connecting plate, and the upper end of the moving pole is connected to the connecting plate.

[0015] Preferably, a connecting thread is provided on the upper side of the outer wall of the moving pole, and a limiting ring is provided on the outer wall of the moving pole and located below the connecting thread. A fastening nut is connected to the upper side of the outer wall of the moving pole through the connecting thread, and the fastening nut and the limiting ring are respectively located on the upper and lower sides of the connecting plate.

[0016] (3) Beneficial effects

[0017] The present invention provides a capacitive high-precision weighing sensor, which has at least the following advantages compared with the prior art:

[0018] Through the supporting effect of the guide cover on the upper support ring, the contact area between the guide cover and the upper support ring is large, making it difficult for the upper support ring to tilt relative to the guide cover. Therefore, the moving pole is not easily compressed and deformed, making the measurement of the capacitive weighing sensor body accurate.

[0019] The cooperation between the slide groove and the supporting ball makes the upper supporting ring move more smoothly relative to the guide cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the separate structure of the guide cover and the upper support ring of the utility model;

[0022] Figure 3 This is a schematic diagram of the split structure between the upper support ring, the guide cover, and the capacitive weighing sensor body of the utility model;

[0023] Figure 4This is a schematic diagram of the internal structure of the upper support ring of the present invention.

[0024] In the figure: 1. Capacitive weighing sensor body; 2. Fixed connection edge; 3. Moving pole; 4. External thread; 5. Guide cover; 6. Connecting thread; 7. Limiting ring; 8. Upper support ring; 9. Upper connecting plate; 10. Slide groove; 11. Support ball; 12. Connecting plate; 13. Fastening nut. DETAILED DESCRIPTION

[0025] 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 embodiments described 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.

[0026] Example 1:

[0027] See also Figure 1-4 , the utility model provides a technical solution: a capacitive high-precision weighing sensor, comprising: a capacitive weighing sensor body 1, a guide cover 5;

[0028] The upper surface of the capacitive weighing sensor body 1 is movably connected with the moving pole 3, the guide cover 5 is hollow, the guide cover 5 is fixedly connected to the upper side of the outer wall of the capacitive weighing sensor body 1, the inner wall of the guide cover 5 is embedded with a supporting ball 11, the inner cavity of the guide cover 5 is movably inserted with an upper support ring 8, the upper support ring 8 is fixedly connected to the top of the moving pole 3, and a slide groove 10 corresponding to the position of the support ball 11 is longitudinally opened on the outer wall of the upper support ring 8, the support ball 11 is slidably connected to the slide groove 10, and an upper connecting plate 9 is provided at the upper end of the outer wall of the upper support ring 8.

[0029] Analysis of the above content: The capacitive weighing sensor body 1 adopts the existing capacitive weighing sensor (such as the MD 4000 model sensor of the Eilersen brand), and the capacitive weighing sensor body 1 and the upper connecting plate 9 are respectively in contact with the upper and lower objects. Under the action of gravity, the upper object presses down the upper connecting plate 9, the upper support ring 8, and the moving pole 3. The moving pole 3 presses down one of the plates of the capacitive weighing sensor body 1, and the plate moves relative to the other plate, changing the capacitance, and the weight of the upper object is measured based on this (existing technology, which will not be repeated here).

[0030] The guiding cover 5 and the supporting balls 11 support the upper supporting ring 8 and the sliding groove 10 , so that the upper supporting ring 8 moves smoothly relative to the guiding cover 5 .

[0031] Example 2:

[0032] See also Figure 1-4 The present invention provides a technical solution based on the first embodiment: a fixed connection edge 2 is provided on the lower side of the outer wall of the capacitive weighing sensor body 1 .

[0033] Analysis of the above content: By setting the fixed connecting edge 2, it is convenient to fix the capacitive weighing sensor body 1 from the bottom.

[0034] Example 3:

[0035] See also Figure 1-4 The present invention provides a technical solution based on the first embodiment: an external thread 4 is provided on the upper side of the outer wall of the capacitive weighing sensor body 1, and an internal thread matching the external thread 4 is provided on the lower side of the inner wall of the guide cover 5.

[0036] Analysis of the above content: The external thread 4 is connected to the internal thread of the guide cover 5, which is convenient for connection, disassembly and internal maintenance.

[0037] Example 4:

[0038] See also Figure 1-4 , the utility model provides a technical solution based on embodiment 1: the inner cavity of the upper support ring 8 is provided with a connecting plate 12, the upper end of the moving pole 3 is connected to the connecting plate 12, and a connecting thread 6 is provided on the upper side of the outer wall of the moving pole 3. A limiting ring 7 is provided on the outer wall of the moving pole 3 and located below the connecting thread 6. A fastening nut 13 is connected to the upper side of the outer wall of the moving pole 3 through the connecting thread 6. The fastening nut 13 and the limiting ring 7 are respectively located on the upper and lower sides of the connecting plate 12.

[0039] Analysis of the above content: The fastening nut 13 and the limiting ring 7 are used to connect and fix the moving pole 3 and the connecting plate 12 from the upper and lower sides.

[0040] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A capacitive high-precision weighing sensor, characterized in that: include: A capacitive weighing sensor body (1), wherein the upper surface of the capacitive weighing sensor body (1) is movably connected to a movable pole (3); A guide cover (5) is hollow and fixedly connected to the upper side of the outer wall of the capacitive weighing sensor body (1). The inner wall of the guide cover (5) is embedded with a supporting ball (11). The inner cavity of the guide cover (5) is movably connected with an upper supporting ring (8). The upper supporting ring (8) is fixedly connected to the top of the moving pole (3). A sliding groove (10) corresponding to the position of the supporting ball (11) is longitudinally opened on the outer wall of the upper supporting ring (8). The supporting ball (11) is slidably connected to the sliding groove (10). An upper connecting plate (9) is provided at the upper end of the outer wall of the upper supporting ring (8).

2. A capacitive high-precision weighing sensor according to claim 1, characterized in that: A fixed connection edge (2) is provided on the lower side of the outer wall of the capacitive weighing sensor body (1).

3. A capacitive high-precision weighing sensor according to claim 1, characterized in that: An external thread (4) is provided on the upper side of the outer wall of the capacitive weighing sensor body (1), and an internal thread matching the external thread (4) is provided on the lower side of the inner wall of the guide cover (5).

4. A capacitive high-precision weighing sensor according to claim 1, characterized in that: The inner cavity of the upper support ring (8) is provided with a connecting plate (12), and the upper end of the moving pole (3) is connected to the connecting plate (12).

5. A capacitive high-precision weighing sensor according to claim 4, characterized in that: A connecting thread (6) is provided on the upper side of the outer wall of the movable pole (3); a limiting ring (7) is provided on the outer wall of the movable pole (3) and located below the connecting thread (6); a fastening nut (13) is connected to the upper side of the outer wall of the movable pole (3) via the connecting thread (6); the fastening nut (13) and the limiting ring (7) are respectively located on the upper and lower sides of the connecting plate (12).

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