Non-contact gradienter
By combining differential capacitance sensors with the principle of gravity, the contactless leveling instrument is designed to solve the problem that the existing technology cannot perform horizontal measurements in three-dimensional space and cannot identify um-level deviations, and high-precision contactless leveling measurement and calibration are achieved.
Patent Information
- Application Number
- CN202422152568.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-09-03
AI Technical Summary
Existing levels cannot be calibrated and measured in three-dimensional space. The quantization accuracy is not high, the um level cannot be recognized, and the level measurement and calibration of the surface of an incontact object cannot be carried out.
By combining a differential capacitance sensor with the principle of gravity, a contactless level is designed. When the instrument is placed vertically, a plurality of first differential capacitance sensors are arranged on the circumference of the center of gravity position of the arc surface, as a reference point for absolute horizontality, and contactless measurement is achieved.
Level calibration and measurement in three-dimensional space is realized, measurement accuracy is improved, deviations at the um level can be identified, and surfaces of incontact objects can be measured and calibrated without contact.
Smart Images
Figure CN222964648U_ABST
Abstract
Description
Technical Field
[0001] The embodiment of the utility model relates to the technical field of level measurement, in particular to a non-contact level gauge. Background Art
[0002] A plane level gauge is a precision measuring instrument often used for angle measurement in industrial fields such as aerospace, civil engineering, mechanical manufacturing, and information technology. Plane level gauges can be divided into bubble level gauges and digital level gauges according to the working principle.
[0003] In the existing market, level gauges generally achieve two-dimensional space level calibration and measurement based on a vacuum level bubble. They cannot achieve level calibration and measurement in three-dimensional space, and their level calibration and measurement quantization accuracy is not particularly high. They cannot identify the level in the order of micrometers, and for situations where the surface of the object to be measured cannot be contacted, level measurement and calibration cannot be performed. Summary of the Utility Model
[0004] The utility model provides a non-contact level gauge. By combining a differential capacitance sensor with the gravity principle, when the non-contact level gauge is placed vertically, multiple first differential capacitance sensors serve as reference points for absolute levelness, and based on the characteristics of the differential capacitance sensor, non-contact measurement can be achieved.
[0005] In a first aspect, the embodiment of the utility model provides a non-contact level gauge, which includes a lower cover housing and an upper cover housing;
[0006] The lower cover housing is fixedly connected to the upper cover housing;
[0007] The lower cover housing includes a curved surface protruding towards the side away from the upper cover housing;
[0008] The curved surface includes multiple first differential capacitance sensors;
[0009] The multiple first differential capacitance sensors are located on the same horizontal plane, and the multiple first differential capacitance sensors are arranged on a circumference around the center of gravity of the curved surface.
[0010] Optionally, the curved surface includes at least four first differential capacitance sensors; the at least four first differential capacitance sensors are evenly arranged.
[0011] Optionally, the curved surface further includes a second differential capacitance sensor; the second differential capacitance sensor is located at the center of gravity of the curved surface.
[0012] Optionally, the horizontal plane where the first differential capacitance sensor is located is the first horizontal plane, and the horizontal plane where the second differential capacitance sensor is located is the second horizontal plane;
[0013] The second horizontal plane is closer to the upper cover housing than the first horizontal plane;
[0014] The distance D between the first horizontal plane and the second horizontal plane satisfies: D ≤ L / 2, where L is the recognizable distance of the first differential capacitance sensor.
[0015] Optionally, the non-contact level further includes a circuit board, and the circuit board is located in the enclosed space formed by the fixation of the lower cover housing and the upper cover housing;
[0016] A plurality of display devices are arranged on the upper cover housing, and the circuit board is electrically connected to the plurality of first differential capacitance sensors and the plurality of display devices respectively.
[0017] Optionally, the upper cover housing includes a first surface facing the lower cover housing and a second surface away from the lower cover housing;
[0018] A groove is arranged on the first surface, and the circuit board is fixed in the groove;
[0019] The plurality of display devices are arranged on the second surface.
[0020] Optionally, a plurality of through holes are further arranged on the arc surface, and the through holes penetrate the arc surface;
[0021] The arc surface further includes a second differential capacitance sensor;
[0022] Both the first differential capacitance sensor and the second differential capacitance sensor are fixed in the through holes, so that the recognition parts of the first differential capacitance sensor and the second differential capacitance sensor are exposed on the outermost side of the non-contact level.
[0023] Optionally, the upper cover housing includes a plurality of first screw holes, and the lower cover housing includes a plurality of second screw holes;
[0024] The first screw holes and the second screw holes are arranged correspondingly;
[0025] The first screw holes and the second screw holes are fixedly connected by screws.
[0026] Optionally, the arc surface includes a circular arc surface.
[0027] Optionally, the upper cover housing further includes a fixing structure, and the fixing structure is located at the center of the upper cover housing, so that when the non-contact level is fixed at a set position, the plurality of first differential capacitance sensors are located on the same horizontal plane.
[0028] An embodiment of the present utility model discloses a non-contact level. The non-contact level includes a lower cover housing and an upper cover housing. The lower cover housing is fixedly connected to the upper cover housing. The lower cover housing includes a curved surface protruding toward the side away from the upper cover housing, and the curved surface includes a plurality of first differential capacitance sensors. The plurality of first differential capacitance sensors are located on the same horizontal plane, and the plurality of first differential capacitance sensors are arranged on a circumference around the center of gravity of the curved surface. In this way, by combining the differential capacitance sensor with the principle of gravity, when the non-contact level is placed vertically, since the plurality of first differential capacitance sensors are arranged on a circumference around the center of gravity of the curved surface and the plurality of first differential capacitance sensors are located on the same horizontal plane, the plurality of first differential capacitance sensors are reference points for absolute levelness. And based on the characteristics of the differential capacitance sensor, non-contact measurement can be achieved. Description of the Drawings
[0029] Figure 1 is a schematic structural diagram of a non-contact level provided by an embodiment of the present utility model;
[0030] Figure 2 is a bottom view of a non-contact level provided by an embodiment of the present utility model;
[0031] Figure 3 is a schematic structural diagram of another non-contact level provided by an embodiment of the present utility model. Detailed Embodiments
[0032] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following will, in conjunction with the accompanying drawings in the embodiments of the present utility model, completely describe the technical solutions of the present utility model through specific embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.
[0034] Figure 1 is a schematic structural diagram of a non-contact level provided by an embodiment of the present utility model, Figure 2 is a bottom view of a non-contact level provided by an embodiment of the present utility model. Refer to Figure 1 and Figure 2 , the non-contact level includes a lower cover housing 10 and an upper cover housing 20. The lower cover housing 10 is fixedly connected to the upper cover housing 20. The lower cover housing 10 includes a curved surface 110 protruding toward a side away from the upper cover housing 20. A plurality of first differential capacitance sensors 111 are included on the curved surface 110. The plurality of first differential capacitance sensors 111 are located on the same horizontal plane, and the plurality of first differential capacitance sensors 111 are arranged on a circumference around the centroid position a of the curved surface 110.
[0035] Specifically, the upper cover housing 10 and the lower cover housing 20 are the outermost parts of the non-contact level, and the main material may include a metal material, which plays a protective role in the whole structure. The upper cover housing 20 and the lower cover housing 10 are fixedly connected to form a closed space between the upper cover housing 20 and the lower cover housing 20. It should be noted that the embodiment of the present utility model does not limit the specific fixing method of the upper cover housing 20 and the lower cover housing 10. For example, the upper cover housing 20 and the lower cover housing 10 can be fixed by means of a buckle, or can be fixed by means of screws, and those skilled in the art can set according to needs. In addition, the lower cover housing 10 includes a curved surface 110 protruding toward a side away from the upper cover housing 20, wherein the curved surface 110 can be a circular arc surface. Specifically, the lower cover housing 10 can be understood as a spherical section body, that is, a part of the sphere is cut off to form the lower cover housing 10, and the spherical surface of the cut-off part is the curved surface 110 of the lower cover housing 10. It can be understood that when the lower cover housing 10 includes the curved surface 110, the centroid position of the curved surface is the center position of the curved surface 110, wherein the centroid position is the balance point when the object is affected by gravity.
[0036] A plurality of first differential capacitors 111 are also arranged on the curved surface 110. Among them, the plurality of first differential capacitors 111 are used to measure the distances at different positions on the plane of the object to be measured. As Figure 2As shown in the figure, since multiple first differential capacitance sensors 111 are located on the circumference around the centroid position a of the arc surface 110 and the multiple first differential capacitance sensors are located on the same horizontal plane, when the non-contact level is placed vertically, under the action of gravity, the multiple first differential capacitance sensors 111 on the same concentric circle around the centroid position a are on an absolutely horizontal plane. Thus, the setting points of the multiple first differential capacitance sensors 111 are the reference points for absolute levelness. In this way, only the distance information measured by the multiple first differential capacitance sensors 111 needs to be obtained, and then the distance information of multiple points is compared to determine which direction has a levelness deviation. The measurement method is simple. In addition, based on the physical characteristics of the differential capacitance sensor, that is, the physical distance between the differential capacitance sensor itself and the object to be measured can be measured without contact, the effective recognition range can reach the 5 mm level, and the minimum resolution is 150 nm. Furthermore, during measurement, the non-contact level only needs to be set above the object to be measured, without contacting the object to be measured, and the levelness measurement and calibration can be carried out for those situations where the surface of the object to be detected cannot be contacted, expanding the application scenarios.
[0037] In summary, in the embodiment of the present utility model, the lower cover housing is fixedly connected to the upper cover housing. The lower cover housing includes an arc surface protruding toward the side away from the upper cover housing, and multiple first differential capacitance sensors are included on the arc surface. The multiple first differential capacitance sensors are located on the same horizontal plane, and the multiple first differential capacitance sensors are arranged on the circumference around the centroid position of the arc surface. In this way, the differential capacitance sensor is combined with the gravity principle. When the non-contact level is placed vertically, since the multiple first differential capacitance sensors are arranged on the circumference around the centroid position of the arc surface and the multiple first differential capacitance sensors are located on the same horizontal plane, the multiple first differential capacitance sensors are the reference points for absolute levelness. And based on the characteristics of the differential capacitance sensor, non-contact measurement can be achieved.
[0038] Optionally, on the basis of the above embodiment, continue to refer to Figure 1 and Figure 2 , at least four first differential capacitance sensors 111 are included on the arc surface 110, and the at least four first differential capacitance sensors 111 are evenly arranged. Exemplarily, in the embodiments shown in Figure 1 and Figure 2 , on the same concentric circle around the center position a, four first differential capacitance sensors 111 are arranged. The four first differential capacitance sensors 111 are evenly arranged, that is, the four first differential capacitance sensors 111 are respectively located directly in front of the centroid position a ( Figure 2 above in Figure 2below), directly to the left, and directly to the right. In this way, the distances in four directions of the object to be measured can be measured by four evenly arranged first differential capacitance sensors 111. Since the setting points of the four first differential capacitance sensors 111 are the reference points for absolute levelness, only the distance information measured by the four first differential capacitance sensors 111 needs to be obtained, and then the four distance information are compared to determine which direction has a deviation in levelness. The measurement method is simple.
[0039] It should be noted that the embodiments of the present invention are only exemplarily described with four first differential capacitance sensors 111 as an example, but are not limited thereto. In other embodiments, there may also be 6 first differential capacitance sensors or 8 first differential capacitance sensors, etc., which can be set by those skilled in the art according to needs.
[0040] Optionally, on the basis of the above embodiments, continue to refer to Figure 1 and Figure 2 Figure. There is also a second differential capacitance sensor 112 on the arc surface 110. The second differential capacitance sensor 112 is located at the centroid position a of the arc surface 110. Specifically, the second differential capacitance sensor 112 is used to control the distance between the non-contact level and the object to be measured. For example, the second differential capacitance sensor 112 is used to determine whether the distance between the non-contact level and the object to be measured is too far, so as to avoid the first differential capacitance sensor 111 being unable to detect the object to be measured due to too far a distance. At the same time, since the second differential capacitance sensor 112 is located at the centroid position a of the arc surface 110 and the first differential capacitance sensors 111 are located on the circumference around the centroid position, the horizontal plane where the second differential capacitance sensor 112 is located and the horizontal plane where the first differential capacitance sensors 111 are located can be set not to be in the same horizontal plane. Furthermore, a three-dimensional coordinate system of the object to be measured can be formed by the first differential capacitance sensors 111 and the second differential capacitance sensor 112 (installation position and detection distance), and then the levelness of the surface of the object to be measured can be judged from the three-dimensional space direction, improving the accuracy of levelness measurement.
[0041] On the basis of the above embodiments, continue to refer to Figure 1 and Figure 2 Figure. The horizontal plane where the first differential capacitance sensors 111 are located is the first horizontal plane, and the horizontal plane where the second differential capacitance sensor 112 is located is the second horizontal plane. The second horizontal plane is closer to the upper cover housing 20 than the first horizontal plane. The distance D between the first horizontal plane and the second horizontal plane satisfies: D ≤ L / 2, where L is the recognizable distance of the first differential capacitance sensor.
[0042] Specifically, the second differential capacitance sensor 112 and the first differential capacitance sensor 111 are of the same type of sensor, that is, the recognizable distances of the first differential capacitance sensor 111 and the second differential capacitance sensor 112 are the same. In addition, the second differential capacitance sensor 112 is located on the side of the first differential capacitance sensor 111 close to the upper cover housing 20. In other words, the first differential capacitance sensor 111 can be located on the outer wall of the lower cover housing 10, while the second differential capacitance sensor 112 can be located inside the lower cover housing 10 and at the centroid position a (central axis) of the arc surface 110, so that the horizontal plane where the second differential capacitance sensor 112 is located is closer to the upper cover housing 20 than the horizontal plane where the first differential capacitance sensor 111 is located. In addition, since when the object to be measured is outside the recognizable distance of the first differential capacitance sensor 111, the first differential capacitance sensor 111 detects the levelness of the non-contact level gauge. Furthermore, by setting the distance D between the first horizontal plane and the second horizontal plane to satisfy: D ≤ L / 2, in this way, when the second differential capacitance sensor 112 detects the object to be measured, the object to be measured is within the recognizable distance of the first differential capacitance sensor 111, thereby ensuring that the first differential capacitance sensor 111 can detect the levelness of the object to be measured.
[0043] Optionally, based on the above embodiment, continue to refer to Figure 1 , the non-contact level gauge further includes a circuit board 30, and the circuit board 30 is located in the enclosed space formed by the fixation of the lower cover housing 10 and the upper cover housing 20. A plurality of display devices 210 are provided on the upper cover housing 20, and the circuit board 30 is electrically connected to the plurality of first differential capacitance sensors 111 and the plurality of display devices 210 respectively.
[0044] Specifically, a circuit board 30 is further provided in the enclosed space formed by the fixation of the lower cover housing 10 and the upper cover housing 20. The circuit board 30 integrates electrical characteristic link processing and levelness conversion algorithm functions. The first differential capacitance sensors 111 and the display devices 210 are arranged in one-to-one correspondence and are both electrically connected to the circuit board 30. Furthermore, the circuit board 30 can display the information measured by each first differential capacitance sensor 111 on the corresponding display device, realizing the rapid real-time and visualization of the measurement data.
[0045] Optionally, Figure 3 is a schematic structural diagram of another non-contact level gauge provided by an embodiment of the present invention. Refer to Figure 1 and Figure 3 , the upper cover housing 20 includes a first surface S1 facing the lower cover housing 10 and a second surface S2 away from the lower cover housing 10. A groove 220 is provided on the first surface S1, and the circuit board 30 is fixed in the groove 220. A plurality of display devices 210 are provided on the second surface S2.
[0046] Specifically, the first surface S1 is the inner surface of the upper cover housing 20, and the second surface S2 is the outer surface of the upper cover housing 20. Further, by disposing the display device 210 on the second surface S2, it is convenient for the user to observe the final level measurement result. In addition, the circuit board 30 is fixed in the groove on the first surface S1, thereby reducing the thickness of the non-contact level and making full use of the internal space.
[0047] Optionally, based on the above embodiment, refer to Figure 1 , a plurality of through holes 113 are further provided on the arc surface 110, and the through holes 113 penetrate through the arc surface 110. The arc surface 110 further includes a second differential capacitance sensor (not shown in the figure). The first differential capacitance sensor 111 and the second differential capacitance sensor are both fixed in the through holes 113 so that the identification parts of the first differential capacitance sensor 111 and the second differential capacitance sensor are exposed on the outermost side of the non-contact level. Further, it is ensured that the first differential capacitance sensor 111 and the second differential capacitance sensor can work normally.
[0048] Optionally, based on the above embodiment, continue to refer to Figure 1 , the upper cover housing 20 includes a plurality of first screw holes 240, and the lower cover housing includes a plurality of second screw holes 114. The first screw holes 240 and the second screw holes 114 are correspondingly arranged, and the first screw holes and the second screw holes are fixedly connected by screws. In this way, the upper cover housing 20, the lower cover housing 10, and the circuit board 30 are fixed by screws, ensuring that the fixing method is simple.
[0049] Optionally, based on the above embodiment, continue to refer to Figure 1 , the upper cover housing 20 further includes a fixing structure 250, and the fixing structure 250 is located at the center of the upper cover housing 20 so that when the non-contact level is fixed at the set position, a plurality of first differential capacitance sensors 111 are located on the same horizontal plane. That is, by means of the fixing structure 250 located at the center of the upper cover housing 20, when the non-contact level is fixed at the set position, under the action of gravity, a plurality of first differential capacitance sensors 111 on the same concentric circle around the center of gravity position a are in an absolutely horizontal plane, so that the setting points of the plurality of first differential capacitance sensors 111 are reference points for absolute levelness.
[0050] Note that the above is only the preferred embodiment of the present utility model and the technical principles applied. Those skilled in the art will understand that the present utility model is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments, combinations with each other, and substitutions can be made by those skilled in the art without departing from the protection scope of the present utility model. Therefore, although the present utility model has been described in more detail through the above embodiments, the present utility model is not limited to the above embodiments only. Without departing from the concept of the present utility model, more other equivalent embodiments can be included, and the scope of the present utility model is determined by the scope of the appended claims.
Claims
1. A non-contact level, characterized in that: The non-contact level comprises a lower cover shell and an upper cover shell; The lower cover shell is fixedly connected to the upper cover shell; The lower cover shell comprises a curved surface convex toward a side away from the upper cover shell; The arc surface includes a plurality of first differential capacitance sensors; The plurality of first differential capacitance sensors are located on the same horizontal plane, and the plurality of first differential capacitance sensors are arranged on a circumference surrounding the center of gravity of the arc surface.
2. The non-contact level according to claim 1, characterized in that: The arc surface includes at least four first differential capacitance sensors; At least four first differential capacitance sensors are evenly arranged.
3. The non-contact level according to claim 1, characterized in that: The arc surface also includes a second differential capacitance sensor; The second differential capacitance sensor is located at the center of gravity of the arc surface.
4. The non-contact level according to claim 3, characterized in that: The horizontal plane where the first differential capacitance sensor is located is a first horizontal plane, and the horizontal plane where the second differential capacitance sensor is located is a second horizontal plane; The second horizontal plane is closer to the upper cover shell than the first horizontal plane; A distance D between the first horizontal plane and the second horizontal plane satisfies: D≤L / 2, where L is a recognizable distance of the first differential capacitive sensor.
5. The non-contact level according to claim 1, characterized in that: The non-contact level further comprises a circuit board, and the circuit board is located in a closed space formed by fixing the lower cover shell and the upper cover shell; A plurality of display devices are disposed on the upper cover shell, and the circuit board is electrically connected to the plurality of first differential capacitance sensors and the plurality of display devices.
6. The non-contact level according to claim 5, characterized in that: The upper cover shell comprises a first surface facing the lower cover shell and a second surface away from the lower cover shell; A groove is provided on the first surface, and the circuit board is fixed in the groove; A plurality of the display devices are arranged on the second surface.
7. The non-contact level according to claim 1, characterized in that: The arc surface is also provided with a plurality of through holes, and the through holes penetrate the arc surface; The arc surface also includes a second differential capacitance sensor; The first differential capacitance sensor and the second differential capacitance sensor are both fixed in the through hole, so that identification parts of the first differential capacitance sensor and the second differential capacitance sensor are exposed at the outermost side of the contactless level.
8. The non-contact level according to claim 1, characterized in that: The upper cover shell includes a plurality of first screw holes, and the lower cover shell includes a plurality of second screw holes; The first screw hole and the second screw hole are arranged correspondingly; The first screw hole and the second screw hole are fixedly connected by screws.
9. The non-contact level according to claim 1, characterized in that: The arc surface includes an arc surface.
10. The non-contact level according to claim 1, characterized in that: The upper cover shell further comprises a fixing structure, and the fixing structure is located at the center of the upper cover shell, so that when the non-contact level is fixed at a set position, the plurality of the first differential capacitance sensors are located on the same horizontal plane.