A non-contact measurement device based on Hall element

Abstract

This invention relates to a non-contact measuring device based on a Hall element, mainly comprising a lower base plate, a column, a guide rail, a slider, a measuring platform, a rotating mechanism, a model, a measuring plate, a permanent magnet, a Hall element, and a top plate. The column is fixed to the lower base plate, the guide rail is mounted on the column, the measuring platform is mounted on the slider, and the rotating mechanism is mounted on the measuring platform. The bottom of the rotating mechanism is connected to the measuring platform, and the top of the rotating mechanism is connected to the model. A permanent magnet is mounted on the model, and a Hall element is mounted on the measuring plate, which is fixed to the top plate. This device uses a motor to drive the model's movement, and the Hall element senses the magnetic field strength of the permanent magnets arranged on the model. Utilizing the principle that the magnetic field strength of the permanent magnets changes with distance, the distance relationship between the Hall element and the model is determined, thus completing the non-contact measurement of the model's position by the Hall element.

Description

Technical Field

[0001] This invention belongs to the field of experimental aerodynamics and relates to a non-contact measurement device based on Hall elements. Background Technology

[0002] Wind Tunnel Trajectory Test (CTS) is a special wind tunnel simulation test technology that uses the principle of relativity of motion and similarity theory to simulate the actual motion trajectory of an external object deployed by an aircraft during its motion, thereby achieving the separation of the external object from the aircraft body. It has been applied to the separation characteristic test research of various types of aircraft such as rockets, providing reliable test basis for the design and development of aircraft control systems.

[0003] Since the CTS mechanism is located inside the wind tunnel, it is subjected to wind load impact when the wind tunnel starts up, resulting in a certain deviation between its structure and the windless state. To measure this deviation, considering the limited space in the wind tunnel test, a Hall element (141) is used to sense the magnetic field strength to measure the distance deviation. First, a non-contact ground measurement device based on the Hall element (141) needs to be established to complete the technical verification before the wind tunnel test measurement.

[0004] Therefore, it is necessary to study a non-contact measurement device based on Hall elements, which is of great significance for solving the problem of positional deviation in wind tunnel tests of CTS mechanisms. Besides wind tunnel testing, this non-contact measurement device can also be applied to other extreme measurement scenarios with limited space. Summary of the Invention

[0005] The technical problem solved by this invention is to overcome the shortcomings of the prior art and propose a non-contact measurement device based on Hall elements to realize ground verification of non-contact measurement using Hall elements.

[0006] The solution of the present invention is:

[0007] This invention discloses a non-contact measuring device based on a Hall element, comprising: a lower base plate, a column, a guide rail, a back plate, a lead screw, a coupling, a lifting motor base, a lifting motor, a slider, a measuring platform, a lead screw connecting plate, a rotary motor base, a rotary motor, a model fixing plate, a rotary motor connector, a top plate, a measuring plate, a model, a permanent magnet, a Hall element, a rotary motor base, and a lead screw support; wherein,

[0008] The column is mounted on the bottom plate, and the guide rail is mounted on the column; the slider is mounted on the guide rail and can slide along the guide rail.

[0009] The back panel is installed on the column and serves to strengthen the structure.

[0010] The lifting motor mount is installed on the back plate, and the lifting motor is mounted on the lifting motor mount.

[0011] Two lead screw supports are mounted on the back plate and are respectively connected to the two ends of the lead screw;

[0012] The lead screw is connected to the lifting motor via a coupling;

[0013] The top panel is installed on the back panel;

[0014] The measuring plate is installed on the lower surface of the top plate;

[0015] One end of the lead screw connecting plate is connected to the lead screw, and the other end is connected to the measuring platform;

[0016] The rotary motor mount is installed on the measuring platform;

[0017] The rotary motor is mounted on a rotary motor mount;

[0018] The rotary motor connector is mounted on the motor shaft of the rotary motor, and the model fixing plate is mounted on the rotary motor connector;

[0019] The model is fixed on the model mounting plate;

[0020] The model is equipped with multiple permanent magnets;

[0021] The measuring board is equipped with multiple Hall elements;

[0022] The model moves up and down by rotating a lifting motor and rotates by rotating a rotary motor. The Hall element senses the magnetic field of the permanent magnet on the model and then determines the position and angle of the model relative to the Hall element.

[0023] Furthermore, in the aforementioned equipment, the lower base plate has a plate-like structure with a hole in the middle; the column is a long strip structure with a base, and the base has screw holes for connecting the lower base plate.

[0024] Furthermore, in the aforementioned device, the backplate includes a first backplate, a second backplate, a third backplate, and a fourth backplate; wherein,

[0025] The guide rail is installed on the front end face of the column, the first back plate, the second back plate, and the third back plate are installed on the rear end face of the column, and the fourth back plate is installed on the front end face of the column.

[0026] The lifting motor base is installed on the first back plate; two lead screw supports are installed on the second and third back plates respectively, and are connected to the two ends of the lead screw respectively; the top plate is installed on the fourth back plate.

[0027] Furthermore, in the above-mentioned device, there are two pairs of guide rails and sliders, which are respectively installed on the front end faces of the two columns.

[0028] Furthermore, the aforementioned device also includes a connecting plate; the connecting plate is a right-angled plate structure with a reinforcing rib in the middle; one end of the connecting plate is connected to the slider, and the other end is connected to the measuring platform; the two connecting plates are respectively installed on the two sliders.

[0029] Furthermore, in the above-mentioned equipment, the measuring platform is a plate-shaped structure, and the lower surface of the measuring platform is connected to the connecting plate and the lead screw connecting plate respectively; the rotary motor base is installed on the upper surface of the measuring platform.

[0030] Furthermore, in the above-mentioned equipment, the lifting motor base is a right-angled plate structure with reinforcing ribs at both ends; the lifting motor base is vertically installed on the front end face of the first back plate, and the lifting motor is installed inside the lifting motor base;

[0031] The lifting motor is connected to the lead screw via a coupling; the lead screw is vertically fixed between the two columns via two upper and lower lead screw supports; the lead screw supports are respectively installed on the front end faces of the second back plate and the third back plate.

[0032] Furthermore, the above-mentioned device also includes a rib plate. The measuring plate is a cuboid plate structure with a slot at the lower end for fixing the Hall element. The upper end of the measuring plate has a threaded hole for connecting to the top plate. The top plate is a cuboid plate structure with a threaded hole on its surface and is perpendicular to the fourth back plate through the rib plate.

[0033] Furthermore, in the above-mentioned equipment, the model fixing plate is a cuboid plate structure, and the lower surface of the model fixing plate has threaded holes for fixing to the rotary motor connector;

[0034] The lower surface of the model fixing plate has threaded holes for fixing the model;

[0035] The rotary motor connector has a convex three-dimensional structure with a central hole for connecting the motor shaft of the rotary motor.

[0036] Furthermore, in the above-mentioned device, the model surface is provided with openings for fixing permanent magnets; when the model and the measuring plate are horizontal, the installation positions of the permanent magnets correspond one-to-one with the installation positions of the Hall elements, and the spacing is the same.

[0037] The advantages of this invention compared to the prior art are:

[0038] (1) The non-contact measurement device based on Hall element designed in this invention uses Hall element to sense the magnetic field strength of permanent magnet and completes non-contact measurement of model position by Hall element, providing a new non-contact measurement method for wind tunnel test.

[0039] (2) The non-contact measuring device based on Hall element designed in this invention uses a motor to drive the model and realize the automated control of the measurement process.

[0040] (3) The non-contact measurement device based on Hall element designed in this invention uses a very small Hall element that can be applied to extremely narrow spaces.

[0041] (4) The non-contact measuring device based on Hall element designed in this invention has a compact overall design, is simple and reliable, and is easy to process. Attached Figure Description

[0042] Figure 1 This is a diagram of a non-contact measurement device based on a Hall element according to an embodiment of the present invention. Detailed Implementation

[0043] The invention will now be further described with reference to the accompanying drawings.

[0044] This invention discloses a non-contact measuring device based on a Hall element, comprising: a lower base plate 1, a column 2, a guide rail 4, a back plate, a lead screw 25, a coupling 21, a lifting motor base 22, a lifting motor 23, a slider 7, a measuring platform 8, a lead screw connecting plate 19, a rotary motor base 18, a rotary motor 24, a model fixing plate 16, a rotary motor connector 17, a top plate 10, a measuring plate 14, a model 15, a permanent magnet 151, a Hall element 141, a rotary motor base 18, and a lead screw support 20; wherein,

[0045] The column 2 is mounted on the bottom plate 1, and the guide rail 4 is mounted on the column 2; the slider 7 is mounted on the guide rail 4 and can slide along the guide rail 4.

[0046] The back panel is installed on column 2 and serves to strengthen the structure.

[0047] The lifting motor base 22 is mounted on the back plate, and the lifting motor 23 is mounted on the lifting motor base 22;

[0048] Two lead screw supports 20 are mounted on the back plate and are respectively connected to the two ends of the lead screw 25;

[0049] The lead screw 25 is connected to the lifting motor 23 via the coupling 21;

[0050] Top plate 10 is installed on back plate;

[0051] Measuring plate 14 is installed on the lower surface of top plate 10;

[0052] One end of the lead screw connecting plate 19 is connected to the lead screw 25, and the other end is connected to the measuring platform 8;

[0053] Rotary motor mount 18 is mounted on measuring platform 8;

[0054] The rotary motor 24 is mounted on the rotary motor base 18;

[0055] The rotary motor connector 17 is mounted on the motor shaft of the rotary motor 24, and the model fixing plate 16 is mounted on the rotary motor connector 17;

[0056] Model 15 is fixed on model fixing plate 16;

[0057] Model 15 is equipped with multiple permanent magnets 151;

[0058] The measuring plate 14 is provided with multiple Hall elements 141;

[0059] The lifting motor 23 rotates to drive the model 15 to move up and down, and the rotary motor 24 rotates to drive the model 15 to rotate. The Hall element 141 senses the magnitude of the magnetic field of the permanent magnet 151 set on the model 15, and then determines the position and angle of the model 15 relative to the Hall element 141.

[0060] Preferably, the lower base plate 1 has a plate-like structure with a hole in the middle; the column 2 is a long strip structure with a base, and the base has screw holes for connecting the lower base plate 1.

[0061] Preferably, the back panel includes a first back panel 3, a second back panel 5, a third back panel 9, and a fourth back panel 12; wherein,

[0062] The guide rail 4 is installed on the front end face of the column 2, the first back plate 3, the second back plate 5, and the third back plate 9 are installed on the rear end face of the column 2, and the fourth back plate 12 is installed on the front end face of the column 2.

[0063] The lifting motor base 22 is installed on the first back plate 3; two lead screw supports 20 are installed on the second back plate 5 and the third back plate 9 respectively, and are connected to the two ends of the lead screw 25 respectively; the top plate 10 is installed on the fourth back plate 12.

[0064] Preferably, there are two pairs of guide rails 4 and sliders 7, which are respectively installed on the front end faces of the two columns 2.

[0065] Preferably, it also includes a connecting plate 6; the connecting plate 6 is a right-angled plate structure with a reinforcing rib in the middle; one end of the connecting plate 6 is connected to the slider 7, and the other end is connected to the measuring platform 8; the two connecting plates 6 are respectively installed on the two sliders 7.

[0066] Preferably, the measuring platform 8 has a plate-like structure, and the lower surface of the measuring platform 8 is connected to the connecting plate 6 and the lead screw connecting plate 19 respectively; the rotary motor base 18 is installed on the upper surface of the measuring platform 8.

[0067] Preferably, the lifting motor base 22 is a right-angled plate structure with reinforcing ribs at both ends; the lifting motor base 22 is vertically installed on the front end face of the first back plate 3, and the lifting motor 23 is installed inside the lifting motor base 22;

[0068] The lifting motor 23 is connected to the lead screw 25 via the coupling 21; the lead screw 25 is vertically fixed between the two columns 2 via two upper and lower lead screw supports 20; the lead screw supports 20 are respectively installed on the front end faces of the second back plate 5 and the third back plate 9.

[0069] Preferably, it also includes a rib plate 11, the measuring plate 14 is a cuboid plate structure with a slot at the lower end for fixing the Hall element 141; the measuring plate 14 has a threaded hole at the upper end for connecting the top plate 10; the top plate 10 is a cuboid plate structure with a threaded hole on its surface, and is perpendicular to the fourth back plate 12 through the rib plate 11.

[0070] Preferably, the model fixing plate 16 is a cuboid plate structure, and the lower surface of the model fixing plate 16 has threaded holes for fixing to the rotary motor connector 17;

[0071] The lower surface of the model fixing plate 16 is provided with threaded holes for fixing the model 15;

[0072] The rotary motor connector 17 has a convex three-dimensional structure with a central hole for connecting the motor shaft of the rotary motor 24.

[0073] Preferably, the surface of the model 15 is provided with openings for fixing the permanent magnet 151; when the model 15 and the measuring plate 14 are horizontal, the installation position of the permanent magnet 151 corresponds one-to-one with the installation position of the Hall element 141, and the spacing is the same.

[0074] Example

[0075] The present invention discloses a non-contact measurement device based on Hall element. First, the model 15 is installed on the model fixing plate 16. The lifting motor 23 rotates to drive the model 15 to move downward. The level of the model 15 is measured by a level instrument and other equipment. After the model stops falling, the level is measured again. The model 15 is adjusted to a horizontal state by driving the rotary motor 24.

[0076] The lifting motor 23 rotates to drive the model 15 upward. It stops when the permanent magnet 151 on the model 15 comes into contact with the Hall element 141.

[0077] The drive model 15 then descends by 1 mm each time, and the Hall element 141 is used for synchronous measurement to obtain the distance value measured by the Hall element 141.

[0078] When model 15 descends to 3mm, it is driven to rotate 0.5° each time, and the Hall element 141 is used for synchronous measurement. The angle value measured by the Hall element 141 is calculated. The pitch angle of model 15 is no greater than ±2 degrees, and the rotation step is no greater than 0.5° each time.

[0079] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A non-contact measuring device based on a Hall element, characterized in that, include: Bottom plate (1), column (2), guide rail (4), back plate, lead screw (25), coupling (21), lifting motor base (22), lifting motor (23), slider (7), measuring platform (8), lead screw connecting plate (19), rotary motor base (18), rotary motor (24), model fixing plate (16), rotary motor connector (17), top plate (10), measuring plate (14), model (15), permanent magnet (151), Hall element (141), rotary motor base (18), lead screw support (20); among which, The column (2) is installed on the bottom plate (1), and the guide rail (4) is installed on the column (2); the slider (7) is installed on the guide rail (4) and can slide along the guide rail (4); The back panel is installed on the column (2) and serves to strengthen the structure; The lifting motor base (22) is mounted on the back plate, and the lifting motor (23) is mounted on the lifting motor base (22); Two lead screw supports (20) are installed on the back plate and are respectively connected to the two ends of the lead screw (25); The lead screw (25) is connected to the lifting motor (23) via a coupling (21); Top plate (10) is installed on back plate; The measuring plate (14) is installed on the lower surface of the top plate (10); One end of the lead screw connecting plate (19) is connected to the lead screw (25), and the other end is connected to the measuring platform (8); The rotary motor mount (18) is mounted on the measuring platform (8); The rotary motor (24) is mounted on the rotary motor mount (18); The rotary motor connector (17) is mounted on the motor shaft of the rotary motor (24), and the model fixing plate (16) is mounted on the rotary motor connector (17); The model (15) is fixed on the model fixing plate (16); The model (15) is equipped with multiple permanent magnets (151); The measuring plate (14) is provided with multiple Hall elements (141); The lifting motor (23) rotates to drive the model (15) to move up and down, and the rotary motor (24) rotates to drive the model (15) to rotate. The Hall element (141) senses the magnitude of the magnetic field of the permanent magnet (151) placed on the model (15) and thus obtains the position and angle of the model (15) relative to the Hall element (141).

2. The non-contact measuring device based on a Hall element according to claim 1, characterized in that, The lower base plate (1) is a plate-shaped structure with a hole in the middle; the column (2) is a long strip structure with a base, and the base has screw holes for connecting the lower base plate (1).

3. The non-contact measuring device based on a Hall element according to claim 1, characterized in that, The backplate includes a first backplate (3), a second backplate (5), a third backplate (9), and a fourth backplate (12); wherein, The guide rail (4) is installed on the front end face of the column (2), the first back plate (3), the second back plate (5), and the third back plate (9) are installed on the rear end face of the column (2), and the fourth back plate (12) is installed on the front end face of the column (2); The lifting motor base (22) is installed on the first back plate (3); two screw supports (20) are installed on the second back plate (5) and the third back plate (9) respectively, and are connected to the two ends of the screw (25); the top plate (10) is installed on the fourth back plate (12).

4. A non-contact measuring device based on a Hall element according to claim 3, characterized in that, The guide rail (4) and slider (7) are provided in two pairs and are respectively installed on the front end face of the two columns (2).

5. A non-contact measuring device based on a Hall element according to claim 1, characterized in that, It also includes a connecting plate (6); the connecting plate (6) is a right-angled plate structure with a reinforcing rib in the middle; one end of the connecting plate (6) is connected to the slider (7), and the other end is connected to the measuring platform (8); the two connecting plates (6) are respectively installed on the two sliders (7).

6. A non-contact measuring device based on a Hall element according to claim 5, characterized in that, The measuring platform (8) is a plate-shaped structure. The lower surface of the measuring platform (8) is connected to the connecting plate (6) and the lead screw connecting plate (19) respectively. The rotary motor base (18) is installed on the upper surface of the measuring platform (8).

7. A non-contact measuring device based on a Hall element according to claim 3, characterized in that, The lifting motor base (22) is a right-angled plate structure with reinforcing ribs at both ends; the lifting motor base (22) is vertically installed on the front end face of the first back plate (3), and the lifting motor (23) is installed inside the lifting motor base (22); The lifting motor (23) is connected to the lead screw (25) via a coupling (21); the lead screw (25) is vertically fixed between the two columns (2) via two upper and lower lead screw supports (20); the lead screw supports (20) are respectively installed on the front end face of the second back plate (5) and the third back plate (9).

8. A non-contact measuring device based on a Hall element according to claim 1, characterized in that, It also includes a rib plate (11), the measuring plate (14) is a cuboid plate structure with a slot at the lower end for fixing the Hall element (141); the measuring plate (14) has a threaded hole at the upper end for connecting the top plate (10); the top plate (10) is a cuboid plate structure with a threaded hole on the surface, and is perpendicular to the fourth back plate (12) through the rib plate (11).

9. A non-contact measuring device based on a Hall element according to claim 8, characterized in that, The model fixing plate (16) is a rectangular plate structure. The lower surface of the model fixing plate (16) has a threaded hole, which is fixed to the rotary motor connector (17). The lower surface of the model fixing plate (16) is provided with threaded holes for fixing the model (15); The rotary motor connector (17) has a convex three-dimensional structure with a central hole for connecting the motor shaft of the rotary motor (24).

10. A non-contact measuring device based on a Hall element according to claim 1, characterized in that, The model (15) has openings on its surface for fixing permanent magnets (151); when the model (15) and the measuring plate (14) are horizontal, the installation positions of permanent magnets (151) correspond one-to-one with the installation positions of Hall elements (141), and the spacing is the same.

Images