Calibration device for laser displacement sensor

Abstract

The present invention provides a calibration device for a laser displacement sensor, which can conveniently calibrate laser parameters. The device comprises a laser calibration plate and a micrometer. The micrometer is mounted on a fixed plate. The laser calibration plate and the fixed plate are connected via an installation connection block. A micrometer head mounting plate is mounted on the laser calibration plate. A micrometer is mounted on the micrometer head mounting plate. A sleeve and a screw on the micrometer penetrate the micrometer head mounting plate together. The screw is connected to a counterweight block via a compression spring. A sliding assembly is mounted on the laser calibration plate. The sliding assembly comprises a slide rail. A slide plate is mounted on the slide rail via a slider. The slide plate is connected to the screw via a follower block. A through groove is formed on the laser calibration plate below the slide plate. The upper part of an inverted T-shaped side slide plate passes through the through groove and is connected to the bottom surface of the slide plate. The length of the through groove is greater than the length of the upper part of the side slide plate and less than the length of the lower part of the side slide plate. An optical glass is mounted on the bottom surface of the lower part of the side slide plate. The probe on the micrometer contacts the end of the optical glass after passing through the fixed plate.

Description

Technical Field

[0001] The invention relates to the technical field of laser calibration, in particular to a calibration device for a laser displacement sensor. Background Art

[0002] Laser displacement sensors are often used to measure the structural stability of products (such as computer touchpads, etc.) under simulated working conditions, but high measurement accuracy is required, up to 0.001mm, so the laser displacement sensor needs to be parameterized and calibrated in order to obtain accurate data. However, when calibrating the laser displacement sensor, it is generally only based on experience to adjust the various parameters of the laser displacement sensor, so it is impossible to determine whether the laser displacement sensor is adjusted to a relatively stable use state, and the adjustment is also difficult. Summary of the invention

[0003] In order to solve the above problems existing in the prior art, the present invention provides a calibration device for a laser displacement sensor, which can conveniently realize the calibration of laser parameters.

[0004] The technical solution is as follows: a calibration device for a laser displacement sensor is placed on a special fixture for detecting the position of a product to be measured, and the calibration side of the calibration device is arranged opposite to the laser displacement sensor. The calibration device is characterized in that: the calibration device comprises a laser calibration plate and a micrometer, the micrometer is mounted on a fixed plate, the laser calibration plate and the fixed plate are connected by a mounting connection block, a micrometer head mounting plate is mounted on the laser calibration plate, a micrometer is mounted on the micrometer head mounting plate, a sleeve on the micrometer and a screw connected to the sleeve pass through the micrometer head mounting plate, and the end of the screw is compressed by a spring. It is connected to the counterweight block installed on the laser calibration plate, and the laser calibration plate is equipped with a sliding assembly, the sliding assembly includes a slide rail, a slide plate is installed on the slide rail through a slider, the slide plate is connected to the screw through a follower block, a through groove is opened on the laser calibration plate below the slide plate, the upper part of the inverted T-shaped side slide block passes through the through groove and is connected to the bottom surface of the slide plate, the length of the through groove is greater than the length of the upper part of the side slide block and less than the length of the lower part of the side slide block, the bottom surface of the lower part of the side slide block is equipped with optical glass, and the measuring needle on the multimeter passes through the fixed plate and contacts with the end of the optical glass.

[0005] It is further characterized by:

[0006] A counterweight mounting plate is fixed on the laser calibration plate, the counterweight block is connected to the counterweight mounting plate, the screw rod and the compression spring thereon penetrate the counterweight mounting plate together, and the compression spring is connected to the counterweight block;

[0007] The micrometers are provided with two and are symmetrically mounted at both ends of the micrometer head mounting plate;

[0008] The sliding assembly is provided with two groups, and is symmetrically arranged at the two ends of the laser calibration plate, the sliding plates at the two ends are connected to the screw rods on their corresponding sides through the follower blocks, and the laser calibration plates at the two ends of the slide rails are provided with slide rail limit blocks;

[0009] The multimeters are provided with two and are symmetrically mounted at both ends of the fixing plate. A recess is provided in the middle of the fixing plate. One end of the mounting connection block is fixed at the position of the recess and the other end is fixed to the laser calibration plate.

[0010] The lower part of the side slider and the two ends of the corresponding laser calibration plate are provided with corresponding grooves, and the measuring needle passes through the fixing plate and contacts the optical glass through the groove;

[0011] The bottom surface of the lower part of the side sliding block is provided with an assembly groove, and the optical glass is installed in the assembly groove.

[0012] The beneficial effect of the present invention is that after the calibration device for the laser displacement sensor is placed on a special fixture for detecting the position of the product to be measured, and its calibration side is arranged opposite to the laser displacement sensor, the knob of the micrometer is then adjusted until the precision digits of the micrometer and the laser displacement sensor readings are the same and stable, which means that a relatively accurate usage parameter has been found, thereby realizing the laser parameter calibration of the laser displacement sensor, which is convenient and quick to adjust and has good economic use value. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0014] Figure 2 It is a schematic diagram of the top view of the assembly structure of the present invention and the special fixture;

[0015] Figure 3 It is a schematic diagram of the decomposed structure of the present invention;

[0016] Figure 4 It is a schematic diagram of the three-dimensional structure of the side slider in the present invention;

[0017] Figure 5 It is a structural schematic diagram of the side slider in the present invention. DETAILED DESCRIPTION

[0018] like Figure 1 to Figure 5As shown, the calibration device for the laser displacement sensor of the present invention is placed on a special fixture 1 for detecting the position of the measured product, and the calibration side of the calibration device (the side close to the counterweight 12) is arranged opposite to the laser displacement sensor 2. The special fixture 1 can be arranged according to the manufacturer's need to detect the measured product. The calibration device in this patent only needs to be placed on the special fixture 1 at the position for detecting the measured product, and no specific requirements are required for the special fixture 1; the calibration device includes a laser calibration plate 3 and a micrometer 4, that is, the laser calibration plate 3 is placed on the special fixture 1 at the position for detecting the measured product, the micrometer 4 is installed on the fixing plate 5, the laser calibration plate 3 and the fixing plate 5 are connected by an installation connection block 6, a micrometer head mounting plate 7 is installed on the laser calibration plate 3, a micrometer 8 is installed on the micrometer head mounting plate 7, a sleeve 9 on the micrometer 8 and a screw 10 connected to the sleeve 9 pass through the micrometer head mounting plate 7, and the screw 10 The end is connected to the counterweight 12 installed on the laser calibration plate 3 through a compression spring 11. The laser calibration plate 3 is equipped with a sliding assembly, which includes a slide rail 13. A slide plate 15 is installed on the slide rail 13 through a slider 14. The slide plate 15 is connected to the screw 10 through a follower block 16. A through groove 17 is opened on the laser calibration plate 3 below the slide plate 15. The upper part of the inverted T-shaped side slide block 18 passes through the through groove 17 and is connected to the bottom surface of the slide plate 15. The length of the through groove 17 is greater than the length of the upper part of the side slide block 18 and less than the length of the lower part of the side slide block 18. An optical glass 19 is installed on the bottom surface of the lower part of the side slide block 18. By rotating the knob 20 on the micrometer 8, the slide plate 15, the side slide block 18 and the optical glass 19 can be driven to slide together. The measuring needle 21 on the micrometer 4 passes through the fixed plate 5 and contacts the end of the optical glass 19; the actual working conditions (position, material, surface roughness, etc.) of the product being measured can be simulated through the optical glass 19.

[0019] A counterweight mounting plate 22 is fixed on the laser calibration plate 3, and the counterweight block 12 is connected to the counterweight mounting plate 22. The screw 10 and the compression spring 11 thereon penetrate the counterweight mounting plate 22 together, and the compression spring 11 is connected to the counterweight block 12; two micrometers 8 are provided, and are symmetrically installed at both ends of the micrometer head mounting plate 7; two sets of sliding assemblies are provided, and are symmetrically arranged at both ends of the laser calibration plate 3, and the slides 15 at both ends are connected to the screws 10 on the corresponding side through the follower blocks 16, and the laser calibration plate 3 at both ends of the slide rail 13 is provided with There is a slide rail limit block 23; there are two multimeters 4, and they are symmetrically installed at both ends of the fixed plate 5. A recess 24 is provided in the middle of the fixed plate 5. One end of the mounting connection block 6 is fixed at the position of the recess 24, and the other end is fixed on the laser calibration plate 3; corresponding grooves 25 are opened at the lower part of the side sliding block 18 and at both ends of the corresponding laser calibration plate 3. After passing through the fixed plate 5, the measuring needle 21 contacts the optical glass 19 through the groove 25 at the lower part of the side sliding block 18; an assembly groove 26 is opened on the bottom surface of the lower part of the side sliding block 18, and the optical glass 19 is installed in the assembly groove 26.

[0020] The calibration device of the present invention simulates the detection position of the product under test. Generally, the product under test is placed on a special fixture 1, and the calibration device also simulates a placement state of the product under test when calibrating. Therefore, the calibration device is directly placed in the actual working position of the product under test, and the laser displacement sensor 2 is calibrated through the micrometer 4 to find a more accurate usage parameter, which is convenient for adjustment and can standardize the process.

[0021] The specific calibration method is as follows:

[0022] (1) Place the calibration device on the special fixture 1 to detect the position of the product to be tested, and turn on the laser displacement sensor 2 and the micrometer 4;

[0023] (2) After adjusting the knob 20 of the micrometer 8 so that the readings of the micrometer 4 and the laser displacement sensor 2 are at the set appropriate values, the micrometer 4 and the laser displacement sensor 2 are simultaneously reset to zero, and then the parameters of the laser displacement sensor 2 are set;

[0024] (3) Repeat step (2) until the precision digits of the readings of the micrometer 4 and the laser displacement sensor 2 are the same and stable;

[0025] (4) After adjusting the knob 20 of the micrometer 8 to the middle value of the range of the set measuring distance, compare the precision digits of the readings of the micrometer 4 and the laser displacement sensor 2 to see whether they are the same and stable;

[0026] (5) After adjusting the knob 20 of the micrometer 8 to the maximum value of the range of the set measuring distance, compare the precision digits of the readings of the micrometer 4 and the laser displacement sensor 2 to see whether they are the same and stable;

[0027] (6) If the precision digits of the readings of the micrometer 4 and the laser displacement sensor 2 are the same and stable, the calibration is completed; otherwise, repeat steps (2) to (5).

[0028] The above definition of the same and stable precision digits of the readings of the micrometer 4 and the laser displacement sensor 2 is that the three digits after the dot of the two readings remain unchanged and the two readings are the same, and the accuracy reaches 0.001mm.

[0029] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A calibration device for a laser displacement sensor, which is placed on a special fixture for detecting the position of a product to be measured, and the calibration side of the calibration device is arranged opposite to the laser displacement sensor, characterized in that: The calibration device includes a laser calibration plate and a micrometer. The micrometer is mounted on a fixed plate. The laser calibration plate and the fixed plate are connected via an installation connection block. A micrometer head mounting plate is mounted on the laser calibration plate. A micrometer is mounted on the micrometer head mounting plate. A sleeve on the micrometer and a screw connected to the sleeve pass through the micrometer head mounting plate. The end of the screw is connected to a counterweight mounted on the laser calibration plate via a compression spring. A sliding assembly is mounted on the laser calibration plate. The sliding assembly includes a slide rail. A slide rail is mounted on the slide rail via a slider. The slide rail is connected to the screw via a follower block. The slide rail is located on the slide rail. A through groove is provided on the laser calibration plate at the bottom, and the upper part of the inverted T-shaped side sliding block passes through the through groove and is connected to the bottom surface of the sliding block, the length of the through groove is greater than the length of the upper part of the side sliding block and less than the length of the lower part of the side sliding block, the bottom surface of the lower part of the side sliding block is equipped with optical glass, and the measuring needle on the multimeter contacts the end of the optical glass after passing through the fixed plate; the lower part of the side sliding block and the corresponding two ends of the laser calibration plate are provided with corresponding grooves, and the measuring needle contacts the optical glass through the groove after passing through the fixed plate; the bottom surface of the lower part of the side sliding block is provided with an assembly groove, and the optical glass is installed in the assembly groove.

2. The calibration device for a laser displacement sensor according to claim 1, characterized in that: A counterweight mounting plate is fixed on the laser calibration plate, the counterweight block is connected to the counterweight mounting plate, the screw rod and the compression spring thereon pass through the counterweight mounting plate together, and the compression spring is connected to the counterweight block.

3. The calibration device for a laser displacement sensor according to claim 1, characterized in that: The micrometers are provided with two and are symmetrically mounted at two ends of the micrometer head mounting plate.

4. The calibration device for a laser displacement sensor according to claim 1, characterized in that: The sliding assembly is provided with two groups and is symmetrically arranged at both ends of the laser calibration plate. The slides at both ends are connected to the screws on their corresponding sides through the follower blocks, and the laser calibration plates at both ends of the slide rails are equipped with slide rail limit blocks.

5. The calibration device for a laser displacement sensor according to claim 1, characterized in that: The multimeters are provided with two and are symmetrically mounted at both ends of the fixing plate. A recess is provided in the middle of the fixing plate. One end of the mounting connection block is fixed at the position of the recess, and the other end is fixed to the laser calibration plate.

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