CN112879513A - Micro-displacement amplification mechanism, amplification system, amplification method, measurement system, aircraft engine and test stand - Google Patents
Micro-displacement amplification mechanism, amplification system, amplification method, measurement system, aircraft engine and test stand Download PDFInfo
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- CN112879513A CN112879513A CN201911200722.0A CN201911200722A CN112879513A CN 112879513 A CN112879513 A CN 112879513A CN 201911200722 A CN201911200722 A CN 201911200722A CN 112879513 A CN112879513 A CN 112879513A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H21/00—Gearings comprising primarily only links or levers, with or without slides
- F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention relates to a micro-displacement amplifying mechanism, an amplifying system, an amplifying method, a measuring system, an aircraft engine and a test bed. The micro displacement amplifying mechanism is provided with a base; the input end receives the input of micro displacement; the amplifying part is used for amplifying the micro displacement to an amplifying displacement and comprises a triangular amplifying assembly and a diamond amplifying structure, wherein adjacent sides of the diamond amplifying structure are connected through a first flexible hinge; the lever amplifying assembly is connected with the triangular amplifying assembly and comprises a lever piece, and the lever piece is provided with a fulcrum; the diamond-shaped amplifying structure is flexibly connected with the lever member, and the output end of the diamond-shaped amplifying structure is connected with the amplifying part and outputs the amplified displacement; the rhombic amplifying structure and the lever piece are respectively connected with the base; the fulcrum of the lever member is connected with the base through a second flexible hinge. The micro-displacement amplification mechanism has the advantages of compact structure, high amplification factor, high amplification efficiency and the like.
Description
Technical Field
The invention relates to the field of micro-displacement measurement, in particular to a micro-displacement amplification mechanism, an amplification system, an amplification method, a measurement system, an aircraft engine and a test bed.
Background
Micro-displacements (micro-displacements), for example displacements that are difficult to monitor due to the presence of a large number of small variations in an aircraft engine, such as rotor-stator clearances, blade tip amplitudes, blade body deformations and blade angle variations, play a crucial part in engine performance and engine control. With the continuous and deep exploration of the aero-engine on the intelligent development road, the control and health monitoring of the aero-engine are realized by detecting the subtle state change of the aero-engine, screening, extracting and effectively utilizing the information, and the method is of great importance in the field of intelligent engine control and in the aspect of health management systems. In the operation process of the aircraft engine, the displacement has small change magnitude, the monitoring difficulty is high, the measurement precision is difficult to ensure, and the realization difficulty of the displacement is more huge when the displacement is used for accurately controlling the engine.
At present, various high-resolution monitoring means for micro-displacement have been developed, mainly including non-optical measurement techniques represented by electricity and microscopes and optical measurement techniques represented by laser interferometry, and have been used to some extent in the field of aviation. However, since many micro-displacement data measured on the engine have small magnitude and poor discrimination, it is not easy to be dominantly used as a monitoring value or directly used as an engine control parameter.
In the prior art, a rigid component is adopted to realize the motion of the whole mechanism by using a kinematic pair, but the method has larger working stroke and lower precision. For example, high precision is realized by adopting a servo motor driving mode or a precision ball screw nut transmission mode, but the nano-scale positioning precision is still difficult to achieve due to transmission friction, thread idle stroke and the like, and at most, the nano-scale positioning precision can only be achieved. There are also structures using flexible hinges, but the magnification factor is small.
Therefore, there is a need in the art for a micro-displacement amplification mechanism that achieves highly accurate and efficient amplification of micro-displacement for highly accurate measurement, data acquisition and processing of micro-displacement for use in, for example, precise control of engine clearances, and micro-displacement measurement testing of components, etc.
Disclosure of Invention
It is an object of the present invention to provide a micro-displacement amplification mechanism to improve the amplification factor and the amplification efficiency.
It is an object of the present invention to provide a micro-displacement amplification system.
An object of the present invention is to provide a micro-displacement measuring system.
An object of the present invention is to provide a micro-displacement acquisition method.
One object of the present invention is to provide an aircraft engine.
One object of the present invention is to provide a micro-displacement test stand.
A micro-displacement amplification mechanism according to an aspect of the present invention includes: a base; the input end receives the input of micro displacement; the amplifying part is used for amplifying the micro displacement to an amplifying displacement and comprises a triangular amplifying assembly and a diamond amplifying structure, wherein adjacent sides of the diamond amplifying structure are connected through a first flexible hinge; the lever amplifying assembly is connected with the triangular amplifying assembly and comprises a lever piece, and the lever piece is provided with a fulcrum; wherein the diamond-shaped amplifying structure is flexibly connected with the lever piece; an output terminal connected to the amplification unit and outputting the amplified displacement; the rhombic amplifying structure and the lever piece are respectively connected with the base; the fulcrum of the lever member is connected with the base through a second flexible hinge.
In one or more embodiments of the micro-displacement amplifying mechanism, the second flexible hinge includes a straight beam-shaped flexible hinge, a second transition rod, an elliptical flexible hinge, and a third transition rod, which are connected in sequence, the straight beam-shaped flexible hinge is connected to the fulcrum, and two ends of the elliptical flexible hinge are connected to the straight beam-shaped flexible hinge and the base through the second transition rod and the third transition rod, respectively.
In one or more embodiments of the micro displacement amplifying mechanism, a first space is defined inside the diamond amplifying structure, the first space is fixedly connected to a micro displacement element, the micro displacement element can generate the micro displacement and output the micro displacement to the input end, the diamond amplifying structure receives the micro displacement and performs a first stage of amplification to output a first stage of amplified displacement, the lever element is connected to the output end, and the lever element amplifies the first stage of amplified displacement into the amplified displacement and outputs the amplified displacement to the output end.
In one or more embodiments of the micro displacement amplification mechanism, the lever member comprises a first stage lever member that receives the first stage amplified displacement and amplifies it into a second stage amplified displacement, and a second stage lever member that receives the second stage amplified displacement and amplifies it into a third stage amplified displacement.
In one or more embodiments of the micro-displacement amplifying mechanism, the first-stage lever member and the second-stage lever member respectively include two first-stage lever members and two second-stage lever members that are axisymmetric with respect to a center line of the triangular amplifying assembly; the two first-level lever parts are respectively defined as a first lever part and a second lever part; the two second-stage lever members are respectively defined as a third lever member and a fourth lever member; the triangular amplification assembly further comprises a fourth flexible hinge and a transition platform, and one vertex of the rhombic amplification mechanism is connected with the transition platform through the fourth flexible hinge; the transition platform is respectively and symmetrically connected with the first lever member and the second lever member through a fifth flexible hinge, and the first lever member and the second lever member are respectively and symmetrically connected with the third lever member and the fourth lever member through a sixth flexible hinge; the fulcrums of the first lever member, the second lever member, the third lever member and the fourth lever member are respectively connected with the base through the second flexible hinge.
In one or more embodiments of the micro-displacement amplification mechanism, the first flexible hinge is a semi-circular flexible hinge; the fourth flexible hinge comprises a fourth transition rod and two semicircular flexible hinges respectively positioned at two ends of the fourth transition rod; the fifth flexible hinge comprises a fifth transition rod and two elliptical flexible hinges respectively positioned at two ends of the fifth transition rod; the sixth flexible hinge comprises a sixth transition rod and two oval flexible hinges respectively positioned at two ends of the sixth transition rod.
In one or more embodiments of the micro-displacement amplifying mechanism, the first stage lever member has a longitudinal height lower than the transition platform, and the second stage lever member has a longitudinal height higher than the transition platform.
In one or more embodiments of the micro displacement amplifying mechanism, the micro displacement amplifying mechanism is made by an integral molding process.
A micro-displacement amplifying system according to an aspect of the present invention includes the micro-displacement amplifying mechanism described in any one of the above, and a micro-displacement element, the micro-displacement element generating the micro-displacement and outputting the micro-displacement to the micro-displacement amplifying mechanism for amplifying to the amplification displacement.
In one or more embodiments of the micro-displacement amplification system, the micro-displacement element includes a piezoelectric stack, and the piezoelectric stack receives an electrical signal and outputs the micro-displacement.
According to an aspect of the present invention, a micro-displacement measurement system includes a first data acquisition system, a micro-displacement amplification system as described in any one of the above, and a second data acquisition system, where the first data acquisition system is configured to sense a displacement of a measured object and output a micro-displacement signal, the micro-displacement object receives the micro-displacement signal and outputs the micro-displacement, the micro-displacement amplification mechanism amplifies the micro-displacement to the amplification displacement, and the data acquisition system acquires the amplification displacement.
According to one aspect of the invention, the aircraft engine comprises the micro-displacement measuring system.
According to one aspect of the invention, the test bed comprises the micro-displacement measuring system.
According to one aspect of the invention, a micro-displacement amplification method amplifies micro-displacement by arranging a micro-displacement amplification mechanism, wherein the amplification mechanism comprises a triangular amplification component and a lever amplification component, and the amplification steps are as follows:
step S1: amplifying the micro displacement to middle amplification displacement through the triangular amplification assembly;
step S2: amplifying the intermediate amplification displacement to output amplification displacement through the lever amplification assembly;
and inputting the intermediate amplification displacement into a lever member of the lever amplification assembly, so that the fulcrum of the lever member moves along with the displacement direction of the intermediate amplification displacement.
In one or more embodiments of the micro-displacement amplifying method, micro-displacement is flexibly transmitted inside the triangular amplifying assembly, between the triangular amplifying assembly and the lever amplifying assembly, and inside the lever amplifying assembly during the amplification of the micro-displacement.
In view of the above, the present invention has the advantages that the combination of the triangular amplification assembly and the flexible connection of the lever amplification assembly is utilized, the pivot is connected to the base through the flexible hinge, and the adjacent sides of the triangular amplification assembly are connected through the flexible hinge, so that the amplification factor and efficiency of micro-displacement are improved in a compact structure under the condition of ensuring the precision, and after amplification, the amplification output of the nano-micro-displacement reaches the millimeter level.
Drawings
The above and other features, nature, and advantages of the present invention will become more apparent from the following description of the embodiments taken in conjunction with the accompanying drawings in which like reference characters refer to like features throughout, it being noted that the drawings are given by way of example only and are not to scale, and should not be taken as limiting the scope of the invention which is actually claimed, wherein:
fig. 1 is a three-dimensional schematic view of a micro-displacement magnification mechanism according to one or more embodiments.
FIG. 2 is a schematic X-Y plane view of a micro-displacement magnification mechanism in accordance with one or more embodiments.
FIG. 3 is a block schematic diagram of a micro-displacement measurement system in accordance with one or more embodiments.
Fig. 4 is a schematic flow diagram of a micro-displacement amplification method according to one or more embodiments.
Detailed Description
The present invention is further described in the following description with reference to specific embodiments and the accompanying drawings, wherein the details are set forth in order to provide a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms different from those described herein, and it will be readily appreciated by those skilled in the art that the present invention can be implemented in many different forms without departing from the spirit and scope of the invention.
The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and do not limit the scope of the invention. For example, if a first feature is formed over or on a second feature described later in the specification, this may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.
Further, it is to be understood that the positional or orientational relationships indicated by the terms "front, rear, upper, lower, left, right", "transverse, vertical, horizontal" and "top, bottom" and the like are generally based on the positional or orientational relationships illustrated in the drawings and are provided for convenience in describing the invention and for simplicity in description, and that these terms are not intended to indicate and imply that the referenced devices or elements must be in a particular orientation or be constructed and operated in a particular orientation without departing from the scope of the invention. Also, this application uses specific language to describe embodiments of the application. The terms "inside" and "outside" refer to the inside and outside of the outline of each component itself, and the terms "first", "second", "third" and "fourth" are used to define the components, and are used only for the convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.
Referring to fig. 1 and 2, in an embodiment, the micro-displacement amplifying mechanism 100 includes an input end (not shown), an output end 14, a base 9, and an amplifying portion 200, and includes a triangular amplifying element 201 and a lever amplifying element 202, where the triangular amplifying element 201 amplifies according to a triangular amplifying principle, and the lever amplifying element 202 amplifies according to a lever principle, which is well known to those skilled in the art and will not be described herein, and the amplifying portion 200 is fixed on the base 9. The input terminal receives an input of a micro-displacement, the amplifying part amplifies the micro-displacement to an amplified displacement, and the output terminal 14 is connected to the amplifying part 200 to output the amplified displacement. The triangular amplifying assembly 201 comprises a diamond-shaped amplifying structure 8, and adjacent sides of the diamond-shaped amplifying structure 8 are connected through a first flexible hinge 4. The lever amplifying assembly 202 is connected with the triangular amplifying assembly 201, the diamond amplifying structure 8 is flexibly connected with the lever member, and the diamond amplifying structure 8 and the lever member are respectively connected with the base 9; the fulcrum of the lever member is connected to the base 9 by a second flexible hinge 21. The beneficial effect that so sets up lies in, through triangle subassembly, the combination of lever subassembly and flexible hinge that enlargies, realizes that the bigger magnification coefficient of micrometric displacement mechanism of enlargies and amplification efficiency. Specifically, the stress concentration at the joint of the adjacent sides of the rhombic amplification structure 8 can be effectively reduced; meanwhile, the diamond-shaped amplifying structure 8 is flexibly connected with the lever piece, so that buckling deformation can be avoided, and displacement transmission is smoother. The fulcrum of the lever member is connected with the base through the flexible hinge, so that the fulcrum can move in the process of amplifying and transferring displacement, and the amplification coefficient of the amplifying mechanism is further increased.
With continued reference to fig. 1 and fig. 2, in an embodiment, a specific structure of the second flexible hinge may be that the second flexible hinge 21 includes a straight beam-shaped flexible hinge 1, a second transition rod 211, an oval flexible hinge 2, and a third transition rod 212, which are connected in sequence, where the straight beam-shaped flexible hinge 1 is connected to a fulcrum of the lever member, and two ends of the oval flexible hinge 2 are connected to the straight beam-shaped flexible hinge 1 and the base 9 through the second transition rod 211 and the third transition rod 212, respectively. The straight beam-shaped flexible hinge 1 has the advantages that the straight beam-shaped flexible hinge 1 is fully utilized to be connected with the fulcrum, so that the offset of the fulcrum in the movement process can be reduced, for example, the movement direction of the input lever member is the y-axis negative direction, so that the offset of the straight beam-shaped flexible hinge 1 in the x-axis direction and the z-axis direction can be reduced, and the amplification factor and the amplification efficiency of the lever are further improved. The combination of the straight beam-shaped flexible hinge 1, the second transition rod 211, the elliptical flexible hinge 2 and the third transition rod 212 can make the transmission of displacement smoother and further improve the amplification efficiency.
With continued reference to fig. 1 and fig. 2, in some embodiments, the specific structure of the amplifying mechanism may further be that the diamond-shaped amplifying structure 8 defines a first space 3 inside, the first space 3 may be fixedly connected to a micro-displacement element 7, and the micro-displacement element 7 may generate micro-displacement output to the input end. The micro-displacement member 7 may be a piezoelectric stack, which is fixed to the connecting edges 81 on both sides of the diamond-shaped amplifying structure 8, and can convert the micro-displacement signal sensed by the strain gauge into an electrical signal to be input into the piezoelectric stack, and the piezoelectric stack generates micro-displacement. Thus, the two connecting sides 81 of the diamond-shaped amplifying structure 8 are used as the input ends of the whole amplifying structure. If the test stand is used for carrying out a micro-displacement measurement test, the piezoelectric stack can be electrified, but the piezoelectric stack can only bear positive voltage, so that the bias of the voltage needs to be noticed when alternating current is electrified, and the voltage needs to be loaded step by step. The piezoelectric stack is used as an input element, and the micro-displacement amplification system comprising the micro-displacement amplification mechanism 100 and the piezoelectric stack can be used as an effective amplification device in the fields of vibration active control, precision driving, optical positioning and the like by utilizing the small volume, large output force, high precision and easy control of the piezoelectric stack. The input end receives micro displacement generated by the piezoelectric stack, the rhombic amplification structure 8 is connected with the input end, the rhombic amplification structure 8 receives the micro displacement, and triangular amplification is carried out under the action of triangular sides 82 and triangular sides 83 and 83, for example, x-direction displacement output by the piezoelectric stack is input from a connecting side 81, and amplified y-direction displacement is output after triangular amplification and is first-stage amplification displacement; and the lever member is connected with the output end 14, and the lever member further amplifies the first-stage amplification displacement into amplification displacement, so that the output end 14 outputs the amplification displacement. The arrangement has the advantages that the micro-displacement piece 7 is integrated into the first space 3 in the diamond amplification structure 8 for the first-stage amplification, so that stable linear movement can be output in the first-stage amplification of the micro-displacement, and further the stable linear movement is transmitted to the lever piece, and the amplification efficiency is high; the structure of the micro-displacement amplifying mechanism can be compacted, so that more stages of amplifying parts are arranged in a space-saving manner. For example, with continued reference to fig. 1 and 2, in one embodiment the lever members include a first stage lever member 203 and a second stage lever member 204, the first stage lever member 203 receives the first stage amplified displacement and amplifies it to a second stage amplified displacement, the second stage lever member 204 receives the second stage amplified displacement and amplifies it to a third stage amplified displacement, and in the embodiment shown in fig. 1 and 2, the second stage lever member 204 is connected to the output 14, i.e., the amplified displacement is output to a third stage amplified displacement. The arrangement can enable the amplification stage number of the amplification mechanism to reach more than three-stage amplification, and further increase the amplification coefficient.
With continued reference to fig. 1 and fig. 2, in an embodiment, the amplifying mechanism 100 may further have a structure that the first-stage lever member 203 and the second-stage lever 204 respectively include a first lever member 10 and a second lever member 20, and a third lever member 6 and a fourth lever member 11, which are axisymmetric about a center line of the triangular amplifying assembly 201. The triangular amplification component 201 further comprises a fourth flexible hinge 24 and a transition platform 12, and one vertex of the rhombic amplification mechanism 8 is connected with the transition platform 12 through the fourth flexible hinge 24; the specific structure of the flexible connection between the triangular amplification assembly 201 and the lever member may be that the transition platform 12 is symmetrically connected to the first lever member 10 and the second lever member 20 through the fifth flexible hinge 19, and the first lever member 10 and the second lever member 20 are symmetrically connected to the third lever member 6 and the fourth lever member 11 through the sixth flexible hinge 18; the fulcrums of the first lever member 10, the second lever member 20, the third lever member 6 and the fourth lever member 11 are respectively connected with the base 9 through second flexible hinges 15, 16, 17 and 21. The beneficial effect that so sets up lies in, sets up symmetrical structure for whole mechanism of amplification is in the transmission, the displacement's of amplification in-process, and the uniformity and the reliability of the amplification result of having guaranteed the life of mechanism of amplification and output are evenly distributed to the stress that produces. Meanwhile, the transition platform 12 is arranged, so that the displacement transmission between the diamond-shaped amplifying structure 8 and the first-stage lever member 203 is smoother, and the amplifying efficiency is improved.
With continued reference to fig. 1 and 2, in one embodiment, the flexible hinge may be embodied as a first flexible hinge 4 that is a semicircular flexible hinge 40; the fourth flexible hinge 5 comprises a fourth transition rod 13 and two semicircular flexible hinges 40 respectively positioned at two ends of the fourth transition rod 13; the fifth flexible hinge 19 comprises a fifth transition rod 191 and two elliptical hinge flexible chains 2 respectively positioned at two ends of the fifth transition rod 191; the sixth flexible hinge 18 includes a sixth transition rod 181 and two elliptical flexible hinges 2 respectively located at two ends of the sixth transition rod 181. The beneficial effect of respectively arranging the semicircular flexible hinge and the elliptical flexible hinge is that the inventor finds that stress concentration is easily generated at the corner of the rhombic amplification structure, and bending deformation is easily generated when the first-stage amplification displacement is transmitted to the lever amplification structure, and the two factors can influence the amplification coefficient and the amplification efficiency of the micro-displacement amplifier. Therefore, adjacent edges of the diamond-shaped amplifying structure 8 are connected through the semicircular flexible hinges, and the fourth transition rod 13 and the two semicircular flexible hinges 40 are added between the diamond-shaped amplifying structure 8 and the transition platform 12 to realize smoother displacement transmission; the elliptical flexible hinge 2 is arranged, so that a larger rotation angle can be transmitted, and the power part and/or the resistance part of the lever member are/is connected with the elliptical flexible hinge 2, so that the amplification factor of the lever amplification assembly 202 can be further increased. Similarly, the lever member and the output end 14 can be connected by an elliptical flexible hinge 2.
With continued reference to fig. 1 and 2, in an embodiment, the longitudinal height of the first-stage lever member 203, i.e. the height in the y-axis direction, is lower than that of the transition platform 12, and the longitudinal height of the second-stage lever member 204 is higher than that of the transition platform 12, so that the arrangement has the beneficial effects that the first-stage lever member, the second-stage lever member and the transition platform are arranged in a staggered manner, so that the longitudinal space required by arranging the two-stage levers can be saved, and the amplification mechanism is miniaturized as a whole.
Referring to fig. 1 and 2, in some embodiments, the base 9, the input end, the amplifying portion 200 and the output end 14 of the micro-displacement amplifying mechanism 100 are integrally connected, that is, the micro-displacement amplifying mechanism 100 can be manufactured by an integral molding process, so that the micro-displacement amplifying mechanism is easy to machine, does not need to consider machining tolerances among the components, and saves installation steps among the components.
Referring to fig. 3, as mentioned above, in an embodiment, the micro displacement measurement system 1000 may include the first data acquisition system 101, the micro displacement amplification system 103, and the second data acquisition system 102, the first data acquisition system 101 acquires and senses the displacement of the measured object 400 and outputs a micro displacement signal, for example, the first data acquisition system 101 may be a strain gauge and a comparison circuit, and outputs the displacement of the measured object 400 sensed by the strain gauge as an electrical signal. The micro-displacement amplification system 103 includes the micro-displacement amplification mechanism 100 and the micro-displacement element according to the above embodiments, the micro-displacement element receives the micro-displacement signal and outputs the micro-displacement, the micro-displacement amplification mechanism 100 amplifies the micro-displacement to the amplified displacement, and the second data acquisition system 102 acquires the amplified displacement and outputs the amplified displacement. For example, when the method is applied to an aircraft engine, the first data acquisition system 101 may measure micro-displacement parameters such as rotor-stator clearance, blade tip amplitude, blade body deformation and the like of the aircraft engine in a flight state, and the micro-displacement parameters are amplified and output to the second data acquisition system 102 through the micro-displacement amplification system 103 and output to a central control unit of the aircraft and/or the aircraft engine to monitor the operation health condition of the aircraft engine, and judge whether the current state of the aircraft and/or the aircraft engine is normal, and whether an adjustment means is needed to adjust the clearance, the amplitude, the deformation and the like. It will be appreciated that the micro-displacement measurement system may also be used with other devices, such as the test stand already described above for measuring micro-displacement.
As mentioned above, the micro-displacement amplification method may include amplifying the micro-displacement by providing a micro-displacement amplification mechanism, where the amplification mechanism includes a triangle amplification component and a lever amplification component, and the specific micro-displacement amplification step may include:
step S1: amplifying the micro displacement to middle amplification displacement through the triangular amplification assembly;
step S2: amplifying the intermediate amplification displacement to output amplification displacement through the lever amplification assembly; and inputting the intermediate amplification displacement into a lever member of the lever amplification assembly, so that the fulcrum of the lever member moves along with the displacement direction of the intermediate amplification displacement.
Further, in the amplification process of the micro displacement, the micro displacement is flexibly transmitted inside the triangular amplification component, between the triangular amplification component and the lever amplification component, and inside the lever amplification component.
In summary, the advantages of the micro-displacement amplification mechanism and the amplification system according to the above embodiments include that the combination of the flexible connection of the triangular amplification component and the lever amplification component is utilized, the pivot is connected to the base by the flexible hinge, and the adjacent sides of the triangular amplification component are connected by the flexible hinge, so that the amplification coefficient and efficiency of micro-displacement are improved in a compact structure under the condition of ensuring the precision, and after amplification, the amplification output of nano-micro-displacement reaches millimeter level.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (15)
1. A micro-displacement amplification mechanism, comprising:
a base;
the input end receives the input of micro displacement;
an amplifying section for amplifying the micro-displacement to an amplified displacement, comprising
The triangular amplification assembly comprises a rhombic amplification structure, and adjacent sides of the rhombic amplification structure are connected through a first flexible hinge; and
the lever amplifying assembly is connected with the triangular amplifying assembly and comprises a lever member, and the lever member is provided with a fulcrum;
wherein the diamond-shaped amplifying structure is flexibly connected with the lever piece;
an output terminal connected to the amplification unit and outputting the amplified displacement;
the rhombic amplifying structure and the lever piece are respectively connected with the base; the fulcrum of the lever member is connected with the base through a second flexible hinge.
2. The micro-displacement amplification mechanism of claim 1, wherein the second flexible hinge comprises a straight beam-shaped flexible hinge, a second transition rod, an elliptical flexible hinge, and a third transition rod, which are connected in sequence, the straight beam-shaped flexible hinge is connected to the fulcrum, and two ends of the elliptical flexible hinge are connected to the straight beam-shaped flexible hinge and the base through the second transition rod and the third transition rod, respectively.
3. The micro-displacement amplifying mechanism as claimed in claim 2, wherein the diamond-shaped amplifying structure defines a first space therein, the first space is fixedly connected to a micro-displacement member, the micro-displacement member can generate the micro-displacement output to the input end, the diamond-shaped amplifying structure receives the micro-displacement, performs a first stage of amplification, and outputs a first stage of amplified displacement, the lever member is connected to the output end, and the lever member amplifies the first stage of amplified displacement into the amplified displacement and outputs the amplified displacement to the output end.
4. The micro-displacement amplifying mechanism of claim 3, wherein said lever member includes a first stage lever member receiving and amplifying said first stage amplified displacement to a second stage amplified displacement and a second stage lever member receiving and amplifying said second stage amplified displacement to a third stage amplified displacement.
5. The micro-displacement amplification mechanism of claim 4,
the first-stage lever piece and the second-stage lever piece respectively comprise two first-stage lever pieces and two second-stage lever pieces which are axially symmetrical by taking the center line of the triangular amplifying assembly as an axis; the two first-level lever parts are respectively defined as a first lever part and a second lever part; the two second-stage lever members are respectively defined as a third lever member and a fourth lever member;
the triangular amplification assembly further comprises a fourth flexible hinge and a transition platform, and one vertex of the rhombic amplification mechanism is connected with the transition platform through the fourth flexible hinge;
the transition platform is respectively and symmetrically connected with the first lever member and the second lever member through a fifth flexible hinge, and the first lever member and the second lever member are respectively and symmetrically connected with the third lever member and the fourth lever member through a sixth flexible hinge; the fulcrums of the first lever member, the second lever member, the third lever member and the fourth lever member are respectively connected with the base through the second flexible hinge.
6. The micro-displacement amplification mechanism of claim 5,
the first flexible hinge is a semicircular flexible hinge;
the fourth flexible hinge comprises a fourth transition rod and two semicircular flexible hinges respectively positioned at two ends of the fourth transition rod;
the fifth flexible hinge comprises a fifth transition rod and two elliptical flexible hinges respectively positioned at two ends of the fifth transition rod;
the sixth flexible hinge comprises a sixth transition rod and two oval flexible hinges respectively positioned at two ends of the sixth transition rod.
7. The micro-displacement amplification mechanism of claim 5, wherein the first stage lever member has a longitudinal height below the transition platform and the second stage lever member has a longitudinal height above the transition platform.
8. The micro-displacement amplification mechanism of any one of claims 1 to 7, wherein the micro-displacement amplification mechanism is made by an integral molding process.
9. A micro-displacement amplification system comprising the micro-displacement amplification mechanism according to any one of claims 1 to 8, and a micro-displacement element, the micro-displacement element generating the micro-displacement and outputting to the micro-displacement amplification mechanism for amplification to the amplification displacement.
10. The amplification system of claim 9, wherein said micro-displacement member comprises a piezoelectric stack, said piezoelectric stack receiving an electrical signal and outputting said micro-displacement.
11. A micro-displacement measuring system, comprising a first data collecting system, the micro-displacement amplifying system of claim 9 or 10, and a second data collecting system, wherein the first data collecting system is configured to sense a displacement of a measured object and output a micro-displacement signal, the micro-displacement object receives the micro-displacement signal and outputs the micro-displacement, the micro-displacement amplifying mechanism amplifies the micro-displacement to the amplified displacement, and the data collecting system collects the amplified displacement.
12. An aircraft engine comprising a micro-displacement measurement system according to claim 11.
13. A test stand comprising the micro-displacement measurement system of claim 11.
14. A micro-displacement amplifying method amplifies micro-displacement by arranging a micro-displacement amplifying mechanism, wherein the amplifying mechanism comprises a triangular amplifying component and a lever amplifying component,
step S1: amplifying the micro displacement to middle amplification displacement through the triangular amplification assembly;
step S2: amplifying the intermediate amplification displacement to output amplification displacement through the lever amplification assembly;
and inputting the intermediate amplification displacement into a lever member of the lever amplification assembly, so that the fulcrum of the lever member moves along with the displacement direction of the intermediate amplification displacement.
15. The micro-displacement amplification method of claim 14, wherein micro-displacement is flexibly transmitted inside the triangular amplification block, between the triangular amplification block and the lever amplification block, and inside the lever amplification block during amplification of the micro-displacement.
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