Angle calibration device for attitude sensor

Abstract

The utility model discloses an attitude sensor angle calibration device, and belongs to the field of sensor calibration. The attitude sensor angle calibration device comprises a working table, a sliding groove is formed in the surface of the working table, the attitude sensor angle calibration device further comprises an angle measuring disc sliding along the sliding groove, the top of the angle measuring disc is rotationally connected with a positioning disc, the positioning disc is provided with a clamping part used for fixing an attitude sensor, and the clamping part is provided with a clamping groove. The top of the angle measuring disc is provided with a rotating part used for pushing the angle measuring disc to rotate. According to the utility model, through the arrangement of the clamping plate, the pushing block and the clamping spring, the mounting and dismounting of the attitude sensor can be rapidly realized, and in the process of inserting the attitude sensor into the positioning disc, airflow is blown to the angle line of the angle measuring disc along the inclined blowing groove, so that dust and impurities attached to the angle line are blown off; and subsequent reading of the angle line is facilitated, and the reading accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensor calibration, in particular to an angle calibration device for a posture sensor. Background Art

[0002] The attitude sensor is usually installed on a specific product to measure the product's angle and other performance parameters. Since the working environment of the attitude sensor changes greatly, it will affect the drift of zero position and sensitivity. Therefore, in order to ensure the accuracy requirements of the attitude sensor, it must be calibrated after production, manufacturing and assembly. The angle attitude of the product generally requires angle calibration.

[0003] The patent with publication number "CN219284305U" is named as the attitude sensor angle calibration device, which includes a fixed bracket, a multi-directional displacement component, a rotating component, a first positioning component and a second positioning component. The fixed bracket includes an upper end frame and a base; the multi-directional displacement component is arranged on the base; the rotating component is arranged on the multi-directional displacement component; the first positioning component is used to locate and carry the first end of the workpiece, is arranged on the rotating component and can drive the workpiece to rotate with the rotating component; the second positioning component is arranged on the upper end frame, and is used to locate the second end of the workpiece. The multi-directional displacement component is used to drive the first end to move in one or more directions to change the offset angle of the axis center line of the workpiece relative to the vertical line. The second positioning component and the first positioning component also jointly fix the axis center line of the workpiece after the position of the workpiece is determined. The above device can achieve high-precision calibration of the attitude sensor angle.

[0004] With respect to the above existing patents, there are still the following shortcomings. First, the installation and removal of the attitude sensor is inconvenient, and it is not possible to effectively ensure that the attitude sensor is exactly in the center of the calibration area, which may cause a reduction in calibration accuracy. Therefore, a device for calibrating the angle of an attitude sensor is proposed. Utility Model Content

[0005] The purpose of the utility model is to solve the problems that the installation and disassembly methods of the posture sensor in the prior art are relatively inconvenient; and the inability to ensure that the posture sensor is exactly in the center of the calibration area, which may cause a decrease in calibration accuracy, and to propose a posture sensor angle calibration device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An attitude sensor angle calibration device comprises a workbench, a sliding groove is provided on the surface of the workbench, and also comprises: an angle measuring disk sliding along the sliding groove, a positioning disk is rotatably connected to the top of the angle measuring disk, and a clamping part for fixing the attitude sensor is provided on the positioning disk, wherein a rotating part for driving the angle measuring disk to rotate is provided on the top of the angle measuring disk, and wherein a translation part for driving the angle measuring disk to slide is provided in the sliding groove.

[0008] In order to facilitate the fixing of the posture sensor, preferably, the clamping part includes a clamping plate, and the side walls around the inner cavity of the positioning plate are provided with clamping grooves, a pushing block is slidably connected in the clamping groove, the outer end of the pushing block is fixedly connected to the side wall of the clamping plate, and a clamping spring is fixedly connected between the inner end of the pushing block and the clamping groove.

[0009] Furthermore, the top of the clamping plate is provided with an arc-shaped rounded corner, and the distance from each group of the clamping plates to the center of the positioning plate is the same.

[0010] In order to improve the calibration accuracy, preferably, the top of the positioning plate is fixedly connected with limiting guide blocks on all sides, the side wall of the limiting guide block is penetrated by a positioning ruler for sliding, the end of the positioning ruler is fixedly connected to the side wall of the limiting guide block, the side wall of the limiting guide block is penetrated by a threaded rod, and the threaded rod is threadedly connected to the limiting guide block.

[0011] Furthermore, angle lines are arranged at equal intervals on the angle measuring disk, a first marking rod is fixedly connected to a side wall of the positioning disk, and an end of the first marking rod is perpendicular to the angle lines.

[0012] In order to facilitate observation of the scale reading, further, an oblique blowing groove is opened at the bottom of the clamping groove, the oblique blowing groove is connected to the inner cavity of the clamping groove, and the output end extension line of the oblique blowing groove intersects at the angle line of the angle measuring disk.

[0013] To facilitate angle calibration, preferably, the rotating part includes a first motor, which is fixed on the top of the angle measuring disk, and the output end of the first motor is fixedly connected to a driving gear, and a driven gear is fixedly connected to the rotating shaft of the positioning disk, and the driven gear is meshingly connected to the driving gear.

[0014] In order to facilitate the calibration of the translation degree, preferably, the translation part includes a reciprocating screw, which is rotatably connected to the inner wall of the sliding groove, and the side wall of the workbench is fixedly connected to a second motor, and the output shaft of the second motor is fixedly connected to the end of the reciprocating screw, and the reciprocating screw is provided with a threaded adjustment limit slider, the top of the limit slider is fixedly connected to the bottom of the angle measuring disk, and the limit slider slides in close contact with the inner wall of the sliding groove.

[0015] Furthermore, a translation scale is fixedly connected to the workbench, a second mark rod is fixedly connected to the side wall of the angle measuring disk, and an end of the second mark rod is perpendicular to the scale line of the translation scale.

[0016] To facilitate calibration, preferably, both the first motor and the second motor are servo motors provided with a reducer.

[0017] Compared with the prior art, the utility model provides a posture sensor angle calibration device, which has the following beneficial effects:

[0018] 1. The attitude sensor angle calibration device can quickly realize the installation and disassembly of the attitude sensor through the setting of the clamping plate, the pushing block and the clamping spring. In the process of inserting the attitude sensor into the positioning plate, the airflow will be blown along the oblique blowing groove to the angle line of the angle measuring plate, so as to blow off the dust and impurities attached to the angle line, facilitate the subsequent reading of the angle line, and improve the accuracy of the reading.

[0019] 2. The attitude sensor angle calibration device, through the setting of the limit guide block, the positioning ruler and the threaded rod, adjusts the different threaded rods accordingly after the attitude sensor is clamped and fixed, so that the attitude sensor is clamped and fixed in the center of the positioning plate cavity, and the clamping plate is limited by resistance, thereby ensuring the accuracy of the attitude sensor angle calibration test.

[0020] 3. The attitude sensor angle calibration device compares the change value of the rotation angle reading of the first benchmark on the angle measuring disk with the rotation angle value measured by the attitude sensor angle itself, thereby completing the calibration test of the attitude sensor angle, so that the attitude sensor detection error is within a reasonable range, ensuring the use effect of the attitude sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a posture sensor angle calibration device proposed by the utility model;

[0022] Figure 2 This is a partial cross-sectional structural diagram of a posture sensor angle calibration device proposed by the utility model;

[0023] Figure 3 A side view half-section structure schematic diagram of a posture sensor angle calibration device proposed by the utility model;

[0024] Figure 4 The utility model is a kind of attitude sensor angle calibration device Figure 3 Schematic diagram of the enlarged structure of area A in the middle.

[0025] In the figure: 1, workbench; 2, sliding groove; 3, angle measuring disk; 31, second benchmark; 4, positioning disk; 41, limit guide block; 42, positioning ruler; 43, threaded rod; 44, first benchmark; 45, driven gear; 5, clamping plate; 51, clamping groove; 511, oblique blowing groove; 52, pushing block; 53, clamping spring; 6, first motor; 61, driving gear; 7, reciprocating screw; 71, second motor; 72, limit slider; 73, translation ruler. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] Example:

[0029] Reference Figure 1-Figure 4 A posture sensor angle calibration device includes a workbench 1, a sliding groove 2 is opened on the surface of the workbench 1, the sliding groove 2 is located at the center of the workbench 1, and the two are parallel to each other, and also includes: an angle measuring disk 3 sliding along the sliding groove 2, a positioning disk 4 is rotatably connected to the top of the angle measuring disk 3, and the angle measuring disk 3 and the positioning disk 4 are both circular, and a clamping part for fixing the posture sensor is arranged on the positioning disk 4, wherein a rotating part for driving the angle measuring disk 3 to rotate is arranged on the top of the angle measuring disk 3, wherein a translation part for driving the angle measuring disk 3 to slide is arranged in the sliding groove 2.

[0030] Reference Figure 1-Figure 4The clamping part includes a clamping plate 5, and the side walls around the inner cavity of the positioning disk 4 are all provided with clamping grooves 51. A pushing block 52 is slidably connected in the clamping groove 51. The outer end of the pushing block 52 is fixedly connected to the side wall of the clamping plate 5, and a clamping spring 53 is fixedly connected between the inner end of the pushing block 52 and the clamping groove 51. The top of the clamping plate 5 is set with an arc-shaped fillet, and the distance from each group of clamping plates 5 to the center of the positioning disk 4 is the same; as described above, the attitude sensor is inserted into the cavity of the positioning disk 4, and its bottom will squeeze the arc-shaped part at the top of the clamping plate 5, so that the surrounding clamping plates 5 simultaneously push the pushing block 52 to retract into the clamping groove 51, so that under the rebound action of the clamping spring 53, the surrounding clamping plates 5 will be tightly fitted with the side walls of the attitude sensor, thereby improving the convenience of installation and disassembly of the attitude sensor.

[0031] Reference Figure 1-Figure 4 , wherein the top of the positioning disk 4 is fixedly connected with a limiting guide block 41 on all sides, and a positioning ruler 42 is slidably penetrated through the side wall of the limiting guide block 41, and the end of the positioning ruler 42 is fixedly connected to the side wall of the limiting guide block 41, and a threaded rod 43 is penetrated through the side wall of the limiting guide block 41, and the threaded rod 43 is threadedly connected to the limiting guide block 41, and the end of the threaded rod 43 is in active contact with the side wall of the clamping plate 5; as described above, by rotating the threaded rod 43 in different directions, the clamping plate 5 is pressed against the clamping plate 5 and then pushed to move, so as to accurately adjust the readings of the positioning ruler 42 on all sides, so as to ensure that the attitude sensor is clamped and fixed in the center of the cavity of the positioning disk 4, and the resistance of the threaded rod 43 is used to limit the clamping plate 5 to prevent it from moving during subsequent rotation, thereby ensuring the accuracy of the attitude sensor angle calibration test.

[0032] Reference Figure 4 Among them, an oblique blowing groove 511 is opened at the bottom of the clamping groove 51, and the oblique blowing groove 511 is connected to the inner cavity of the clamping groove 51, and the output end extension line of the oblique blowing groove 511 intersects at the angle line of the angle measuring disk 3. When the pushing block 52 retracts into the clamping groove 51, the gas in the clamping groove 51 will be compressed, and this part of the gas will be blown toward the angle line of the angle measuring disk 3 along the oblique blowing groove 511, so as to blow off the dust and impurities attached to the angle line, facilitate the subsequent reading of the angle line, and improve the accuracy of the reading.

[0033] Reference Figure 1-Figure 4, wherein the rotating part includes a first motor 6, the first motor 6 is fixed on the top of the angle measuring disk 3, and the first motor 6 is a servo motor provided with a reducer, the output end of the first motor 6 is fixedly connected to a driving gear 61, the rotating shaft of the positioning disk 4 is fixedly connected to a driven gear 45, and the driven gear 45 is meshed with the driving gear 61, and angle lines are arranged at equal intervals on the angle measuring disk 3, and the side wall of the positioning disk 4 is fixedly connected to a first benchmark 44, and the end of the first benchmark 44 is perpendicular to the angle line; as described above, after the posture sensor is fixed, the angle line reading of the angle measuring disk 3 at the first benchmark 44 is read, and then the first motor 6 is turned on to drive the angle measuring disk 3 to rotate through the meshing relationship between the driven gear 45 and the driving gear 61, and stop after rotating a certain angle, and then read the angle line reading of the angle measuring disk 3 at the first benchmark 44 again, and compare it with the angle reading measured by the posture sensor itself, so as to realize the angle calibration of the posture sensor.

[0034] Reference Figure 1-Figure 3 , wherein the translation part includes a reciprocating screw 7, which is rotatably connected to the inner wall of the sliding groove 2, a second motor 71 is fixedly connected to the side wall of the workbench 1, and the second motor 71 also adopts a servo motor with a reducer, and the output shaft of the second motor 71 is fixedly connected to the end of the reciprocating screw 7, and a threaded adjustment limit slider 72 is provided on the reciprocating screw 7, the top of the limit slider 72 is fixedly connected to the bottom of the angle measuring disk 3, and the limit slider 72 slides in contact with the inner wall of the sliding groove 2, a translation scale 73 is fixedly connected to the workbench 1, and a second benchmark rod 31 is fixedly connected to the side wall of the angle measuring disk 3, and the end of the second benchmark rod 31 is vertical The scale line of the translation scale 73 is perpendicular to the scale line of the translation scale 73; as described above, after the posture sensor is fixed, the reading of the translation scale 73 at the second benchmark 31 is read, and then the second motor 71 is turned on to drive the reciprocating screw 7 to rotate, so that the angle measuring disk 3 stops after translating a certain distance. At this time, the reading of the translation scale 73 at the second benchmark 31 is read again, and compared with the displacement reading measured by the posture sensor itself, so as to realize the displacement calibration of the posture sensor. In summary, the angle and displacement of the posture sensor are accurately calibrated to ensure the accuracy of the posture sensor after it is put into use, thereby improving the use effect of the product.

[0035] Reference Figure 1-Figure 4In the present invention, when in use, the attitude sensor is inserted into the cavity of the positioning plate 4. First, the bottom of the attitude sensor will squeeze the arc-shaped portion at the top of the clamping plate 5, so that the surrounding clamping plates 5 simultaneously push the pushing block 52 to retract into the clamping groove 51. When the attitude sensor is fully inserted into the cavity of the positioning plate 4, the surrounding clamping plates 5 will be tightly fitted with the side walls of the attitude sensor under the rebound effect of the clamping spring 53, which is very convenient to realize the clamping positioning of the attitude sensor, and improves the convenience of installation and disassembly in the calibration test of the attitude sensor. Then, the threaded rod 43 is rotated in different directions to make it fit with the clamping plate 5. Then, the clamping plate 5 is pushed to move, so as to accurately adjust the readings of the positioning rulers 42 around, so as to ensure that the posture sensor is clamped and fixed in the center of the cavity of the positioning disk 4, and the resistance of the threaded rod 43 is used to limit the clamping plate 5 to prevent it from moving during subsequent rotation, thereby ensuring the accuracy of the posture sensor angle calibration test; and when the pushing block 52 retracts into the clamping groove 51, the gas in the clamping groove 51 will be compressed, and this part of the gas will be blown toward the angle line of the angle measuring disk 3 along the oblique blowing groove 511, so as to blow off the dust and impurities attached to the angle line, facilitate the subsequent reading of the angle line, and improve the accuracy of the reading;

[0036] When the posture sensor is fixed, the angle line reading of the angle measuring disk 3 at the first benchmark 44 is read, and then the first motor 6 is turned on to drive the angle measuring disk 3 to rotate through the meshing relationship between the driven gear 45 and the driving gear 61, and stop after rotating a certain angle. At this time, the angle line reading of the angle measuring disk 3 at the first benchmark 44 is read again, and compared with the angle reading measured by the posture sensor itself, so as to realize the angle calibration of the posture sensor; and after the posture sensor is fixed, the reading of the translation scale 73 at the second benchmark 31 can be read, and then the second motor 71 is turned on to drive the reciprocating screw 7 to rotate, so that the angle measuring disk 3 translates a certain distance and then stops, and the reading of the translation scale 73 at the second benchmark 31 is read again, and compared with the displacement reading measured by the posture sensor itself, so as to realize the displacement calibration of the posture sensor. In summary, the angle and displacement of the posture sensor are accurately calibrated to ensure the accuracy of the posture sensor after it is put into use, thereby improving the use effect of the product.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A posture sensor angle calibration device, comprising a workbench (1), It is characterized in that The workbench (1) has a sliding groove (2) on its surface, and further comprises: An angle measuring disc (3) slides along the sliding groove (2), the top of the angle measuring disc (3) is rotatably connected to a positioning disc (4), and the positioning disc (4) is provided with a clamping portion for fixing the posture sensor. Wherein, a rotating part for driving the angle measuring disc (3) to rotate is arranged on the top of the angle measuring disc (3). Wherein, a translation part for pushing the angle measuring disc (3) to slide is arranged in the sliding groove (2).

2. The attitude sensor angle calibration device according to claim 1, It is characterized in that The clamping portion comprises a clamping plate (5), and the side walls around the inner cavity of the positioning plate (4) are all provided with clamping grooves (51), a pushing block (52) is slidably connected in the clamping groove (51), the outer end of the pushing block (52) is fixedly connected to the side wall of the clamping plate (5), and a clamping spring (53) is fixedly connected between the inner end of the pushing block (52) and the clamping groove (51).

3. The attitude sensor angle calibration device according to claim 2, It is characterized in that The top of the clamping plate (5) is arranged with an arc-shaped rounded corner, and the distance from each group of the clamping plates (5) to the center of the positioning plate (4) is the same.

4. The attitude sensor angle calibration device according to claim 2, It is characterized in that The top of the positioning plate (4) is fixedly connected to a limiting guide block (41) on all sides, a positioning ruler (42) is slidably passed through the side wall of the limiting guide block (41), the end of the positioning ruler (42) is fixedly connected to the side wall of the limiting guide block (41), a threaded rod (43) is passed through the side wall of the limiting guide block (41), and the threaded rod (43) is threadedly connected to the limiting guide block (41).

5. The attitude sensor angle calibration device according to claim 2, It is characterized in that Angle lines are arranged at equal intervals on the angle measuring disk (3), a first marking rod (44) is fixedly connected to the side wall of the positioning disk (4), and the end of the first marking rod (44) is perpendicular to the angle line.

6. The attitude sensor angle calibration device according to claim 5, It is characterized in that An oblique blowing groove (511) is provided at the bottom of the clamping groove (51), the oblique blowing groove (511) is communicated with the inner cavity of the clamping groove (51), and an extension line of the output end of the oblique blowing groove (511) intersects at the angle line of the angle measuring disk (3).

7. The attitude sensor angle calibration device according to claim 1, It is characterized in that The rotating part comprises a first motor (6), the first motor (6) is fixed on the top of the angle measuring disk (3), the output end of the first motor (6) is fixedly connected to a driving gear (61), the rotating shaft of the positioning disk (4) is fixedly connected to a driven gear (45), and the driven gear (45) is meshingly connected to the driving gear (61).

8. The attitude sensor angle calibration device according to claim 7, It is characterized in that The translation part comprises a reciprocating screw (7), the reciprocating screw (7) is rotatably connected to the inner wall of the sliding groove (2), the side wall of the workbench (1) is fixedly connected to a second motor (71), the output shaft of the second motor (71) is fixedly connected to the end of the reciprocating screw (7), the reciprocating screw (7) is threadedly adjusted with a limit slider (72), the top of the limit slider (72) is fixedly connected to the bottom of the angle measuring disk (3), and the limit slider (72) slides in contact with the inner wall of the sliding groove (2).

9. The attitude sensor angle calibration device according to claim 8, It is characterized in that A translation scale (73) is fixedly connected to the workbench (1), a second mark rod (31) is fixedly connected to the side wall of the angle measuring disk (3), and an end of the second mark rod (31) is perpendicular to the scale line of the translation scale (73).

10. The attitude sensor angle calibration device according to claim 8, It is characterized in that The first motor (6) and the second motor (71) are both servo motors provided with reducers.

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