CN101441106A - Four-freedom degree clamping device of laser vibration measurer - Google Patents

Abstract

The invention discloses a four-degree-of-freedom clamping device for a laser vibrometer, which includes a base, a moving pair I, a moving pair II and a moving pair III arranged on the base to form a three-dimensional coordinate system in a moving direction, and the relative movement of the moving pair I The fixed part is the base, the relatively fixed part of the moving pair II is the moving part of the moving pair I, the relatively fixed part of the moving pair III is the moving part of the moving pair II, and the laser head of the laser vibrometer passes through the rotating pair and the moving pair III The moving parts are connected, and the axis of the rotating pair intersects the moving direction of the moving pair III. The invention can make the laser head of the laser vibrometer realize four degrees of freedom adjustment, and can effectively fix the laser beam of the vibrometer during the vibration measurement process. head, and can easily adjust the relative position of the laser head and the measured object within a certain range, measure the object from various angles, improve the work efficiency of vibration measurement, simple structure, low manufacturing cost, suitable for various vibration measurement use in the environment.

Description

Four degrees of freedom clamping device for laser vibrometer

technical field

The invention relates to a clamping device, in particular to a four-degree-of-freedom clamping device for a laser vibrometer.

Background technique

Laser vibrometers use the principle of optical Doppler to measure the vibration of objects. Laser measurement is a kind of non-contact measurement, which has high measurement accuracy, large measurement dynamic range, and does not affect the movement of the measured object at the same time. It has high spatial resolution and is especially suitable for objects with small volume and inconvenient installation of sensors. The vibration measurement can eliminate the influence of the vibration of the object due to the additional mass of the sensor, and is a way to precisely measure the vibration of the object.

When using a laser vibrometer for laser vibration measurement, in order to maintain the stability of the vibrometer and obtain more accurate measurement results, it is necessary to fix the laser vibrometer. In the measurement process, sometimes it is necessary to adjust the position of the vibrometer to easily measure the vibration of various parts of the object.

In the prior art, the measurement after fixing is adopted, and the installation needs to be dismantled when it needs to be moved, and sometimes the object to be detected cannot be aligned with one installation, therefore, the accuracy of the actual measurement result is affected, and there are many inconveniences in the use process, which reduces the work efficiency. At the same time, it is difficult to measure and fix the vibration of inclined-plane objects in the prior art.

Therefore, there is a need for a device that can effectively fix the laser head of the vibrometer when measuring vibrations, and can easily adjust the position of the laser head of the vibrometer within a certain range when the vibrometer needs to be moved, so as to facilitate the inspection of various parts of the object. Do vibration measurements.

Contents of the invention

In view of this, the object of the present invention is to provide a four-degree-of-freedom clamping device for a laser vibrometer, which can effectively fix the laser head of the vibrometer when measuring vibration, and can conveniently move the vibrometer at a certain Adjust the position of the laser head of the vibrometer within a certain range to measure various parts of the object and improve the work efficiency of vibration measurement.

The four-degree-of-freedom clamping device for the laser vibrometer of the present invention includes a base, a moving pair I, a moving pair II, and a moving pair III arranged on the base to form a three-dimensional coordinate system in a moving direction, and the moving pair I is relatively fixed. The component is the base, the relatively fixed part of the moving pair II is the moving part of the moving pair I, and the relatively fixed part of the moving pair III is the moving part of the moving pair II; The moving parts are connected, and the axis of the rotating pair intersects with the moving direction of the moving pair III.

Further, the moving part of the moving pair I is a moving block I, and the moving block I is driven by a lead screw I arranged on the base; the moving part of the moving pair II is a moving block II, and the moving block II Driven by the lead screw II arranged on the moving block I; the moving part of the moving pair III is the moving block III, and the moving block III is driven by the lead screw III arranged on the moving block II; the moving block III and the laser The head is fixedly connected by an angle adjustment bolt to form a rotary pair, and the axis of the angle adjustment bolt coincides with the axis of the rotary pair;

Further, the moving directions of the moving pair I, the moving pair II and the moving pair III form a three-dimensional Cartesian coordinate system, and the axis of the rotating pair is perpendicular to the moving direction of the moving pair III;

Further, the screw I, the screw II and the screw III are all provided with adjustment knobs;

Further, it also includes a fixed plate fixedly connected with the laser head, and the angle adjustment bolt passes through the fixed plate to connect it with the moving block III;

Further, the lead screw I drives the moving block I through the nut I spun on the lead screw I, the lead screw II drives the moving block II through the nut II spun on the lead screw II, and the lead screw III drives the moving block II through the nut II spun on the lead screw III. The nut III drives the mobile block III;

Further, the lead screw I is arranged on the base through two support blocks I respectively arranged at both ends, the lead screw II is arranged on the moving block I through the two support blocks II respectively arranged at both ends, and the moving block II stands upright A support plate is set, and the lead screw III is set on the support plate through two support blocks III respectively arranged at both ends;

Further, the surface of the base is provided with a longitudinal channel, and the screw I is arranged in the longitudinal channel;

Further, between the moving block I and the base, and between the moving block II and the moving block I, the rails with a dovetail groove structure in cross-section are moved and matched.

The beneficial effects of the present invention are: the four-degree-of-freedom clamping device of the laser vibrometer of the present invention adopts three moving pairs and one rotating pair structure, so that the laser head of the laser vibrometer can be adjusted in four degrees of freedom. When vibrating, the laser head of the vibrometer can be effectively fixed. When the vibration of different parts of the object needs to be measured, the position of the laser head of the vibrometer can be easily adjusted within a certain range, so as to measure various parts of the object and improve the vibration measurement. It can effectively avoid the adverse effect on the accuracy of the measurement results due to the clamping problem of the laser head; the structure is simple, the manufacturing cost is low, and it is light. When the measurement position needs to be adjusted in a large range, it is easy to directly move the entire clamping device. Used in various environments where vibration is measured.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Accompanying drawing is the structural representation of the present invention.

Detailed ways

The accompanying drawing is a schematic structural view of the present invention, as shown in the figure: the four-degree-of-freedom clamping device of the laser vibrometer in this embodiment includes a base 1, and a moving pair arranged on the base 1 in a moving direction to form a three-dimensional Cartesian coordinate system I 2, mobile pair II 3 and mobile pair III4, the relatively fixed part of mobile pair I 2 is base 1, the relatively fixed part of mobile pair II 3 is the mobile part of mobile pair I 2, and the relatively fixed part of mobile pair III4 is The moving parts of the mobile pair II 3; certainly, the coordinate system formed by the mobile pair I 2, the mobile pair II 3 and the mobile pair III4 can also be a non-rectangular coordinate system, and can also realize the purpose of three-dimensional movement. The rectangular coordinate system is easy to locate and convenient to manufacture The laser head 5 of the laser vibrometer is connected with the moving parts of the moving pair III4 through the rotating pair 6, and the axis of the rotating pair 6 intersects and is perpendicular to the moving direction of the moving pair III4; the rotating pair 6 is set to facilitate the application of the laser head Vibration measurement of inclined objects;

The moving part of the moving pair I 2 is the moving block I 21, and the moving block I 21 is driven by the lead screw I 22 arranged on the base 1; the moving part of the moving pair II 3 is the moving block II 31, and the moving block II 31 Driven by the leading screw II 32 arranged on the moving block I 21; the moving part of the moving pair III4 is the moving block III41, and the moving block III41 is driven by the leading screw III42 arranged on the moving block II 31. In the present embodiment, the moving block I 21 and the base 1, as well as between the moving block II 31 and the moving block I 21, are moved and cooperated through a track with a dovetail groove structure in cross section, which can effectively limit the relative lateral movement of the moving block I 21 and the moving block II 31, ensuring Adjustment accuracy;

In this embodiment, the lead screw I 22 drives the moving block I 21 through the nut I23 screwed on the lead screw I 22, and the lead screw II 32 drives the moving block II 31 through the nut II 33 screwed on the lead screw II 32, and the lead screw II III 42 drives the moving block III41 through the nut III43 screwed on the lead screw III42; the structure driven by the nut instead of direct drive can reduce the manufacturing process and reduce the difficulty of installation; I 24 is arranged on the base 1, and the surface of the base 1 is provided with a longitudinal through groove 11, and the leading screw I 22 is arranged in the longitudinal through groove 11, which can save the base material and reduce the weight of the device; the leading screw II 32 is respectively arranged on the two The two supporting blocks II 34 at the end are arranged on the moving block I 21, and the supporting plate 8 is set upright on the moving block II 31, and the said screw III42 is arranged on the supporting plate 8 through the two supporting blocks III44 respectively arranged at the two ends, and the structure Simple and compact; lead screw I 22, lead screw II 32 and lead screw III 42 are respectively provided with adjustment knob 25, adjustment knob 35, and adjustment knob 45, which is convenient for spatial displacement adjustment;

The moving block III41 and the laser head 5 are fixedly connected through the angle adjustment bolt 61 to form the rotation pair 6, and the axis of the angle adjustment bolt 61 coincides with the axis of the rotation pair 6; Pass through the fixed plate 7 to connect it with the moving block III41; adopt the structure of the fixed plate 7, it is easy to install and disassemble, and the space for adjusting the angle adjustment bolt 61 can be large, and the operation is convenient; when the angle needs to be adjusted, unscrew the angle adjustment bolt 61, Adjust the laser head 5 to the required angle along the rotating pair 6, and tighten the angle adjustment bolt 61 to achieve the purpose of adjustment, which is convenient and quick to use.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (9)

1. four-freedom degree clamping device of laser vibration measurer, it is characterized in that: comprise pedestal (1), be arranged on moving sets I (2), sliding pair II (3) and sliding pair II I (4) that pedestal (1) is gone up moving direction formation three-dimensional system of coordinate, the relative fixed parts of described moving sets I (2) are pedestal (1), the relative fixed parts of sliding pair II (3) are the moving-member of moving sets I (2), and the relative fixed parts of sliding pair II I (4) are the moving-member of sliding pair II (3); The laser head of laser vibration measurer (5) is connected with the moving-member of sliding pair II I (4) by revolute pair (6), and the axes intersect of described revolute pair (6) is in the moving direction of sliding pair II I (4).

2. four-freedom degree clamping device of laser vibration measurer according to claim 1 is characterized in that: the moving-member of described moving sets I (2) is movable block I (21), and described movable block I (21) drives by the leading screw I (22) that is arranged on the pedestal (1); The moving-member of described sliding pair II (3) is movable block II (31), and described movable block II (31) is driven by the leading screw II (32) that is arranged on the movable block I (21); The moving-member of described sliding pair II I (4) is movable block III (41), and described movable block III (41) is driven by the leading screw III (42) that is arranged on movable block II (31); Described movable block III (41) and laser head (5) are fixedlyed connected formation revolute pair (6), described angular setting bolt (61) axis and revolute pair (6) dead in line by angular setting bolt (61).

3. four-freedom degree clamping device of laser vibration measurer according to claim 2, it is characterized in that: the direction of motion of described moving sets I (2), sliding pair II (3) and sliding pair II I (4) constitutes three-dimensional cartesian coordinate system, and revolute pair (6) axis normal is in the direction of motion of sliding pair II I (4).

4. four-freedom degree clamping device of laser vibration measurer according to claim 3 is characterized in that: described leading screw I (22), leading screw II (32) and leading screw III (42) all are provided with adjusting knob.

5. four-freedom degree clamping device of laser vibration measurer according to claim 4, it is characterized in that: also comprise the fixed head (7) of fixedlying connected with laser head (5), described angular setting bolt (61) passes fixed head (7) it is connected with movable block III (41).

6. four-freedom degree clamping device of laser vibration measurer according to claim 5, it is characterized in that: described leading screw I (22) drives movable block I (21) by the nut I (23) that is spun on the leading screw I (22), leading screw II (32) drives movable block II (31) by the nut II (33) that is spun on the leading screw II (32), and leading screw III (42) drives movable block III (41) by the nut III (43) that is spun on the leading screw III (42).

7. four-freedom degree clamping device of laser vibration measurer according to claim 6, it is characterized in that: described leading screw I (22) is arranged on the pedestal (1) by two the back-up block I (24) that are separately positioned on two ends, leading screw II (32) is arranged on the movable block I (21) by two the back-up block II (34) that are separately positioned on two ends, back up pad (8) uprightly is set on the movable block II (31), and described leading screw III (42) is arranged on the back up pad (8) by two the back-up block III (44) that are separately positioned on two ends.

8. four-freedom degree clamping device of laser vibration measurer according to claim 7 is characterized in that: described pedestal (1) surface is provided with vertical groove (11), and described leading screw I (22) is arranged in vertical groove (11).

9. four-freedom degree clamping device of laser vibration measurer according to claim 8 is characterized in that: be that the track of oat tail groove structure moves and cooperates by xsect all between described movable block I (21) and the pedestal (1) and between movable block II (31) and the movable block I (21).

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