Installation protection device on calibration equipment for PCBA electronic compass

Abstract

The utility model discloses an installation protection device on calibration equipment for a PCBA electronic compass, which belongs to the technical field of electronic compass calibration equipment, and comprises a protection shell, a fixing unit and a housing, the protection shell is provided with a cavity, the protection shell comprises a door plate convenient for opening the cavity, the protection shell is connected to a rotating platform of a non-magnetic turntable, and the fixing unit is arranged on the door plate. The housing is made of a nickel metal material and is in a circular tube shape, and the fixing unit comprises a positioning module for fixing the electronic compass and a fixing module for fixing the housing. The electronic compass has the beneficial effects that the problem that the precision of the electronic compass is influenced when the electronic compass leaves a factory for calibration is solved through the arrangement of the protective shell and the cover shell, and the electronic compass can be conveniently and fixedly arranged on the rotating platform of the non-magnetic turntable; and the housing cannot be separated from the direction axis of the electronic compass to influence the calibration precision.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic compass calibration equipment technical field, more specifically, it relates to a kind of installation protection device on calibration equipment for PCBA electronic compass. BACKGROUND

[0002] PCBA electronic compass, i.e. electronic compass based on PCBA (Printed Circuit Board Assembly) technology, is a kind of instrument for determining direction using magnetic induction principle, also known as digital compass or digital compass, and its working principle is based on the magnetic field of the earth, and the direction is determined by detecting the direction and intensity of the magnetic field, with the advantages of low energy consumption, small size, light weight, high precision, miniaturization, etc., and electronic compass as navigation instrument or attitude sensor has been widely used in aviation, aerospace, robot, navigation, vehicle autonomous navigation and other fields under modern technical conditions.

[0003] Typical electronic compass generally includes magnetic sensor, processor and power module components, when it is applied, JJG-2 type (referred to as non-magnetic turntable) electronic compass calibration equipment is generally used to calibrate each axis of electronic compass, by fixing electronic compass on the rotating platform of non-magnetic turntable, the rotating platform rotates to obtain measurement value at different angles, and the host computer is used to collect calibration data and save and process subsequent data, but due to the influence of the axis of electronic compass on each other or the existence of some interference substances around, such as ferrous material, mobile phone, etc., these factors will superimpose another magnetic field in space, and then change the size and direction of the original magnetic field, so that the direction output by electronic compass calibration becomes inaccurate, and finally affects the precision of electronic compass, and when calibrating electronic compass, the magnetic sensor of electronic compass is inconvenient to install and fix on non-magnetic turntable. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an installation protection device on calibration equipment for PCBA electronic compass.

[0005] To achieve the above purpose, the utility model provides the following technical scheme:

[0006] An installation protection device on calibration equipment for PCBA electronic compass, including protection shell, fixed unit and cover, the protection shell has cavity, the protection shell is connected on the rotating platform of non-magnetic turntable,

[0007] The protection shell includes door plate convenient for opening the cavity, and the electronic compass is placed in the cavity of the protection shell,

[0008] The cover shell is made of nickel and is in the shape of a circular tube, so as to cover the direction axes of the electronic compass to be calibrated and reduce the magnetic interference between the direction axes of the electronic compass.

[0009] The fixing unit comprises a positioning module for fixing the electronic compass and a fixing module for fixing the cover shell, so as to fix the electronic compass on the rotating platform of the non-magnetic turntable and to stably cover the direction axes of the electronic compass.

[0010] Further, the positioning module comprises an L-shaped plate and a positioning rod, the L-shaped plate is provided with a threaded hole for threadedly connecting the positioning rod, and the output end of the positioning rod is in contact with the electronic compass, the L-shaped plate is movably connected to the bottom plate of the protective shell, and the fixing module comprises a first elastic rubber rope, a second elastic rubber rope, a first fixed hook, a second fixed hook, a first connecting ring and a second connecting ring.

[0011] The cover shell is provided with three cover shells, and the three cover shells are divided into X-axis cover shell, Y-axis cover shell and Z-axis cover shell according to the different direction axes of the electronic compass.

[0012] The X-axis cover shell covers the X-axis direction axis of the electronic compass, the first fixed hook is connected to the bottom plate of the protective shell and is arranged on one side of the X-axis cover shell, one end of the first elastic rubber rope is connected to the bottom plate of the protective shell and is arranged on the other side of the X-axis cover shell, the first connecting ring is connected to the other end of the first elastic rubber rope, and the first connecting ring is hooked with the first fixed hook.

[0013] The Y-axis cover shell covers the Y-axis direction axis of the electronic compass, the second fixed hook is connected to the bottom plate of the protective shell and is arranged on one side of the Y-axis cover shell, one end of the second elastic rubber rope is connected to the bottom plate of the protective shell and is arranged on the other side of the Y-axis cover shell, the second connecting ring is connected to the other end of the second elastic rubber rope, and the second connecting ring is hooked with the second fixed hook.

[0014] The fixing module further comprises two clamping pieces for fixing the Z-axis cover shell, the top plate of the protective shell is provided with a movable hole movably connected with the Z-axis cover shell, and the other end of the Z-axis cover shell passes through the movable hole into the protective shell and covers the Z-axis direction axis of the electronic compass.

[0015] Further, the clamping piece comprises a positioning block, a clamping block and a fixing screw, the positioning block is provided with a fixing screw hole for threadedly connecting the fixing screw, the clamping block is movable on the top plate of the protective shell, the output end of the fixing screw is rotatably connected with the clamping block, and the clamping block is in contact with the surface of the Z-axis cover shell.

[0016] Further, the bottom plate of the protective shell is provided with a sliding groove corresponding to the L-shaped plate and two arc-shaped grooves for accommodating the X-axis cover shell and the Y-axis cover shell respectively, the L-shaped plate is connected with a sliding block slidably connected with the sliding groove, and the sliding block is clamped with the sliding groove.

[0017] Further, the protective shell is made of transparent glass material, and the fixing unit is made of plastic material.

[0018] By adopting the above technical scheme, the electronic compass is prevented from being affected in precision during factory calibration, and the electronic compass is conveniently installed and fixed on the rotating platform of the non-magnetic turntable. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 The utility model discloses an embodiment structure schematic diagram.

[0020] Fig. 2 The utility model discloses an embodiment structure schematic diagram.

[0021] Fig. 3 The utility model discloses an embodiment structure schematic diagram.

[0022] Fig. 4 The utility model discloses an embodiment structure schematic diagram.

[0023] In the figure: protective shell 1, door plate 2, L type board 3, positioning rod 4, threaded hole 5, first elastic rubber rope 6, second elastic rubber rope 7, first fixed hook 8, second fixed hook 9, first connecting ring 10, second connecting ring 11, clamp piece 12, X axis cover 13, Y axis cover 14, Z axis cover 15, movable hole 16, positioning block 121, fixed screw hole 122, clamp block 123, fixed screw rod 124, sliding slot 17, arc slot 18, sliding block 19. DETAILED DESCRIPTION

[0024] Reference Figs. 1 to 4 The utility model further discloses an embodiment structure schematic diagram.

[0025] A kind of installation protection device on PCBA electronic compass calibration equipment, including protective shell 1, fixing unit and cover, protective shell 1 has chamber, protective shell 1 includes the door plate 2 of being convenient for opening chamber, it is convenient to place electronic compass in the chamber of protective shell 1, and it is fixed by positioning module, protective shell 1 is connected on the rotating platform of non-magnetic turntable, and protective shell 1 is made of transparent glass material, to facilitate electronic compass calibration data produced by protective shell 1 to electronic compass when calibration operation.

[0026] The shell is made of nickel material and is in the shape of a circular tube. The shell made of nickel material has high magnetic permeability, low coercive force, high saturation magnetic induction and good processing performance, so that when the shell is covered on the direction axis of the electronic compass to be calibrated, most of the magnetic field lines will pass through the wall of the shell, and there are fewer magnetic field lines in the cavity of the shell. At the same time, the shell can also shield external interference sources, thereby reducing the magnetic interference between the direction axes of the electronic compass due to external factors during calibration of the PCBA electronic compass, and improving the calibration accuracy. In addition, it is easier to change the direction of the magnetic field lines of a cylindrical body or a box body with a circular corner than a shielding body with a square corner in a magnetic field. Therefore, the shell is designed in the shape of a circular tube, thereby avoiding the problem that the accuracy of the electronic compass is affected during factory calibration.

[0027] The fixing unit includes a positioning module for fixing the electronic compass and a fixing module for fixing the shell, so that the electronic compass is fixed on the rotating platform of the non-magnetic turntable. When the non-magnetic turntable calibrates the electronic compass, the electronic compass will not be positionally offset to avoid affecting the calibration result. The fixing module cooperates with the shell to stably cover the direction axis of the electronic compass to be calibrated, thereby avoiding the problem that the shell is separated from the direction axis of the electronic compass when the rotating platform of the non-magnetic turntable rotates, resulting in magnetic interference between the direction axes of the electronic compass and affecting the calibration accuracy. The fixing unit is made of plastic material, which can be selected as polypropylene material. The material of the fixing unit can avoid magnetic interference affecting the calibration result, thereby facilitating the installation and fixation of the electronic compass on the rotating platform of the non-magnetic turntable. When the rotating platform of the non-magnetic turntable drives the protective shell 1 to rotate, the shell will not be separated from the direction axis of the electronic compass, thereby affecting the calibration accuracy.

[0028] The positioning module includes an L-shaped plate 3 and a positioning rod 4. The L-shaped plate 3 is provided with a threaded hole 5 for threaded connection with the positioning rod 4. The output end of the positioning rod 4 is in contact with the electronic compass. The L-shaped plate 3 is movably connected to the bottom plate of the protective shell 1. The door plate 2 of the protective shell 1 is opened, the electronic compass is placed in the cavity of the protective shell 1 and on the bottom plate of the protective shell 1, and the electronic compass is corresponded with the positioning module. The output end of the positioning rod 4 is in contact with the surface of the electronic compass by rotating the positioning rod 4. The electronic compass is fixed on the bottom plate of the protective shell 1 by cooperation of the positioning rod 4 and the bottom plate of the protective shell 1, thereby realizing the fixation of the electronic compass by the positioning module and avoiding the problem that the electronic compass is positionally offset during calibration, affecting the calibration data and resulting in inaccurate calibration result.

[0029] The fixed module comprises a first elastic rubber rope 6, a second elastic rubber rope 7, a first fixed hook 8, a second fixed hook 9, a first connecting ring 10 and a second connecting ring 11, three cover shells are arranged, and the three cover shells are divided into an X-axis cover shell 13, a Y-axis cover shell 14 and a Z-axis cover shell 15 according to different direction axes of the electronic compass, so that the direction axes on the sensor are covered respectively, and the problem of magnetic interference between the direction axes on the sensor is solved by covering the direction axes on the sensor with the cover shells.

[0030] The X-axis cover shell 13 is arranged on the X-axis direction axis of the electronic compass, the first fixed hook 8 is connected to the bottom plate of the protective shell 1 and arranged on one side of the X-axis cover shell 13, one end of the first elastic rubber rope 6 is connected to the bottom plate of the protective shell 1 and arranged on the other side of the X-axis cover shell 13, the first connecting ring 10 is connected to the other end of the first elastic rubber rope 6, and the first connecting ring 10 is hooked with the first fixed hook 8, the first elastic rubber rope 6 is transversely arranged on the X-axis cover shell 13 and abuts against the outer surface of the X-axis cover shell 13 to press the X-axis cover shell 13 on the bottom plate of the protective shell 1, and the first elastic rubber rope 6 is fixed by being hooked with the first fixed hook 8 and the first connecting ring 10, so that the X-axis cover shell 13 is fixed on the bottom plate of the protective shell 1 by the first elastic rubber rope 6, and when the rotating platform of the non-magnetic turntable drives the protective shell 1 to rotate, the X-axis cover shell 13 does not separate from the X-axis direction axis of the electronic compass, and the calibration accuracy is not affected.

[0031] The Y-axis cover shell 14 is arranged on the Y-axis direction axis of the electronic compass, the second fixed hook 9 is connected to the bottom plate of the protective shell 1 and arranged on one side of the Y-axis cover shell 14, one end of the second elastic rubber rope 7 is connected to the bottom plate of the protective shell 1 and arranged on the other side of the Y-axis cover shell 14, the second connecting ring 11 is connected to the other end of the second elastic rubber rope 7, and the second connecting ring 11 is hooked with the second fixed hook 9, the second elastic rubber rope 7 is transversely arranged on the Y-axis cover shell 14 and abuts against the outer surface of the Y-axis cover shell 14 to press the Y-axis cover shell 14 on the bottom plate of the protective shell 1, and the second elastic rubber rope 7 is fixed by being hooked with the second fixed hook 9 and the second connecting ring 11, so that the Y-axis cover shell 14 is fixed on the bottom plate of the protective shell 1 by the second elastic rubber rope 7, and when the rotating platform of the non-magnetic turntable drives the protective shell 1 to rotate, the Y-axis cover shell 14 does not separate from the Y-axis direction axis of the electronic compass, and the calibration accuracy is not affected.

[0032] The fixing module further comprises two clamps 12 for fixing the Z-axis cover 15, which are arranged on both sides of the Z-axis cover 15. The clamp 12 comprises a positioning block 121, a clamp block 123 and a fixing screw 124. The positioning block 121 is provided with a fixing screw hole 122 which is threadedly connected with the fixing screw 124. The clamp block 123 is movably arranged on the top plate of the protective shell 1. The output end of the fixing screw 124 is rotatably connected with the clamp block 123 through a bearing. The clamp block 123 is in surface contact with the Z-axis cover 15. The top plate of the protective shell 1 is provided with a movable hole 16 which movably connects with the Z-axis cover 15. The other end of the Z-axis cover 15 passes through the movable hole 16 and enters the protective shell 1 to cover the Z-axis direction shaft of the electronic compass.

[0033] The Z-axis cover 15 covers the Z-axis direction shaft of the electronic compass through the movable hole 16. The clamp block 123 is moved on the top plate of the protective shell 1 and approaches the Z-axis cover 15 by rotating the fixing screw 124. The surface of the clamp block 123 is in surface contact with the surface of the Z-axis cover 15 by continuously rotating the fixing screw 124. Thus, the two clamps 12 fix the Z-axis cover 15. When the rotating platform without a magnetic turntable drives the protective shell 1 to rotate, the Z-axis cover 15 does not separate from the Z-axis direction shaft of the electronic compass, which affects the calibration accuracy.

[0034] The bottom plate of the protective shell 1 is provided with a sliding groove corresponding to the L-shaped plate 3 and two arc-shaped grooves 18 for accommodating the X-axis cover 13 and the Y-axis cover 14, respectively, so as to better fix the X-axis cover 13 and the Y-axis cover 14 on the bottom plate of the protective shell 1.

[0035] Since the direction shaft of the electronic compass may have different calibration data at different positions of the corresponding cover, the positions of the X-axis cover 13 and the Y-axis cover 14 in the corresponding arc-shaped grooves 18 are adjusted according to the calibration needs, and are fixed by the corresponding first elastic rubber rope 6 and second elastic rubber rope 7. The depth of the X-axis cover 13 covering the X-axis direction shaft of the electronic compass is different, and the depth of the Y-axis cover 14 covering the Y-axis direction shaft of the electronic compass is different. Thus, the calibration data of the X-axis direction shaft and the Y-axis direction shaft of the electronic compass at different positions in the corresponding X-axis cover 13 and Y-axis cover 14 can be obtained.

[0036] The depth of the Z-axis cover 15 covering the Z-axis direction shaft of the electronic compass is adjusted, so as to adjust the different positions of the Z-axis direction shaft of the electronic compass in the Z-axis cover 15. The Z-axis cover 15 is fixed at the position by rotating the fixing screw 124 to make the clamp block 123 in surface contact with the surface of the Z-axis cover 15. Thus, the calibration data of the Z-axis direction shaft of the electronic compass at different positions in the Z-axis cover 15 can be obtained.

[0037] The L-shaped plate 3 is connected with a sliding block 19 which is in sliding connection with a sliding groove, so that the L-shaped plate 3 is movable on the bottom plate of the protective shell 1, and the position of the positioning module is adjusted to better fix the electronic compass. The sliding block 19 is in clamping connection with the sliding groove, so that the L-shaped plate 3 is prevented from being separated from the bottom plate of the protective shell 1 when the L-shaped plate 3 is moved on the bottom plate of the protective shell 1, and the L-shaped plate 3 is stably slid on the bottom plate of the protective shell 1.

[0038] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any change or replacement within the technical scheme of the present application made by those skilled in the art shall be included in the protection scope of the present application.

Claims

1. A mounting guard on a calibration apparatus for a PCBA electronic compass, characterized in that, The utility model relates to a kind of electronic compass protection device, including protective shell (1), fixed unit and cover shell, protective shell (1) has chamber, protective shell (1) is connected on the rotating platform of non-magnetic turntable, Protective shell (1) includes door panel (2) for facilitating opening chamber, to facilitate the electronic compass is placed in the chamber of protective shell (1), Cover shell is composed of nickel metal material and is circular tube, to facilitate cover shell covers on the direction axis of electronic compass to be calibrated to reduce the magnetic interference between direction axis on electronic compass, Fixed unit includes positioning module for fixing electronic compass and fixed module for fixing cover shell, to facilitate electronic compass is fixed on the rotating platform of non-magnetic turntable, also facilitate cover shell is stably covered on the direction axis of electronic compass to be calibrated.

2. A mounting guard on a calibration apparatus for a PCBA electronic compass according to claim 1, wherein, The positioning module includes L-shaped plate (3) and positioning rod (4), L-shaped plate (3) is opened with the threaded hole (5) of positioning rod (4) screw connection, and the output end of positioning rod (4) is in contact with electronic compass, L-shaped plate (3) is movably connected on the bottom plate of protective shell (1), Fixed module includes first elastic rubber rope (6), second elastic rubber rope (7), first fixed hook (8), second fixed hook (9), first connecting ring (10) and second connecting ring (11), Cover shell is equipped with three, and three cover shells are divided into X-axis cover shell (13), Y-axis cover shell (14) and Z-axis cover shell (15) according to the different direction axis on electronic compass, X-axis cover shell (13) is covered on the X-axis direction axis of electronic compass, first fixed hook (8) is connected on the bottom plate of protective shell (1) and is placed on one side of X-axis cover shell (13), one end of first elastic rubber rope (6) is connected on the bottom plate of protective shell (1) and is placed on the other side of X-axis cover shell (13), first connecting ring (10) is connected on the other end of first elastic rubber rope (6), and first connecting ring (10) is hooked with first fixed hook (8), Y-axis cover shell (14) is covered on the Y-axis direction axis of electronic compass, second fixed hook (9) is connected on the bottom plate of protective shell (1) and is placed on one side of Y-axis cover shell (14), one end of second elastic rubber rope (7) is connected on the bottom plate of protective shell (1) and is placed on the other side of Y-axis cover shell (14), second connecting ring (11) is connected on the other end of second elastic rubber rope (7), and second connecting ring (11) is hooked with second fixed hook (9), Fixed module also includes two clamping pieces (12) for fixing Z-axis cover shell (15), the top plate of protective shell (1) is opened with movable hole (16) movably connected with Z-axis cover shell (15), the other end of Z-axis cover shell (15) passes through movable hole (16) and enters protective shell (1) and is covered on the Z-axis direction axis of electronic compass.

3. A mounting guard on a calibration apparatus for a PCBA electronic compass according to claim 2, wherein, The clamping piece (12) includes positioning block (121), clamping block (123) and fixed screw rod (124), the fixed screw hole (122) of positioning block (121) is opened with fixed screw rod (124) screw connection, clamping block (123) is movable on the top plate of protective shell (1), the output end of fixed screw rod (124) is rotatably connected with clamping block (123), and clamping block (123) is in contact with the surface of Z-axis cover shell (15).

4. A mounting guard on a calibration apparatus for a PCBA electronic compass according to claim 3, wherein, The bottom plate of the protective shell (1) is provided with a sliding groove corresponding to the L-shaped plate (3) and two arc-shaped grooves (18) for accommodating the X-axis cover (13) and the Y-axis cover (14) respectively, the L-shaped plate (3) is connected with a sliding block (19) in sliding connection with the sliding groove, and the sliding block (19) is clamped with the sliding groove.

5. A mounting guard on a calibration apparatus for a PCBA electronic compass as claimed in claim 4, wherein, The protective shell (1) is made of transparent glass material, and the fixing unit is made of plastic material.

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