CN114459675A - Large-amplitude sine force generating device - Google Patents
Large-amplitude sine force generating device Download PDFInfo
- Publication number
- CN114459675A CN114459675A CN202111664765.1A CN202111664765A CN114459675A CN 114459675 A CN114459675 A CN 114459675A CN 202111664765 A CN202111664765 A CN 202111664765A CN 114459675 A CN114459675 A CN 114459675A
- Authority
- CN
- China
- Prior art keywords
- base
- excitation source
- mounting table
- force generating
- generating device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005284 excitation Effects 0.000 claims abstract description 68
- 230000005484 gravity Effects 0.000 claims abstract description 42
- 238000002955 isolation Methods 0.000 claims abstract description 17
- 238000009434 installation Methods 0.000 claims description 14
- 238000013016 damping Methods 0.000 claims description 13
- 230000001133 acceleration Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The application relates to a by a wide margin sinusoidal force generating device includes: the device comprises a base, an excitation source, a sensing structure, a mounting table and a gravity compensation device; the excitation source is arranged on the base; the sensing structure is arranged on the top of the excitation source; the mounting table is arranged above the base, and the height of the mounting table is higher than that of the weight; gravity compensation device can dismantle with the mount table and be connected, gravity compensation device's lower extreme can be fixed mutually with the weight, gravity compensation mechanism can together lift the weight, offset the weight that sensing structure bore, so that this by a wide margin sinusoidal force generating device can load sinusoidal value from zero, still have buffer structure in the base of excitation source lower part, reduce rocking of base when low frequency vibration, can play the vibration isolation effect, reduce the requirement of the large amplitude sinusoidal force generating device of this application to installing the ground, cooperate with the base that has buffer structure through gravity compensation device, reduce the reliance of excitation source to large ground, realize exempting from the large amplitude sinusoidal force generating device of ground function.
Description
Technical Field
The application relates to the technical field of metering tests, in particular to a large amplitude sine force generating device.
Background
The sinusoidal force generating device is the core of the force sensor dynamic characteristic calibration device. The sine force generating device usually adopts vibration equipment as an excitation source, an electromagnetic vibration table and a hydraulic vibration table are usually used as the excitation source for realizing the excitation of the large-amplitude sine force, the electromagnetic vibration table has a large volume, cannot cover a low-frequency section, is inconvenient to operate, and has a narrow working frequency range, cannot cover a high-frequency section, has high distortion degree and a complex structure. When large-amplitude sinusoidal force occurs, the mass of the load mass block needing to be selected is large, so that the initial output of the corrected force sensor is large, the measurement cannot be started from the zero point, and the measurement range is influenced.
Disclosure of Invention
In view of this, the present application provides a large amplitude sinusoidal force generating device, including: the device comprises a base, an excitation source, a sensing structure, a mounting table and a gravity compensation device; the excitation source is mounted on the base; the sensing structure is arranged on the excitation source, and the top of the sensing structure is suitable for bearing weights; the mounting table is erected and fixed above the base, and the height of the mounting table is higher than that of the weight; the gravity compensation device with the mount table can be dismantled and be connected, just the lower extreme of gravity compensation device can with the weight is fixed mutually, is used for offsetting the gravity of weight.
In one possible implementation manner, the gravity compensation device comprises a lifting support plate, a telescopic piece and a connecting piece; the lifting support plates are arranged on one side of the mounting table in the longitudinal direction at intervals; one end of the telescopic piece is fixed on the mounting table, the other end of the telescopic piece is fixed on the lifting support plate, and the telescopic piece has a telescopic amount in the longitudinal direction; the upper end of the connecting piece is fixedly connected with the lifting support plate, and the lower end of the connecting piece is fixedly connected with the weight.
In a possible implementation manner, the device further comprises a bearing guide post; the bearing guide pillar is hollow and fixedly mounted on the mounting table, the connecting piece penetrates through the bearing guide pillar and is fixed to the weight, and the connecting piece and the lifting support plate can move up and down in the opening direction of the bearing guide pillar.
In one possible implementation, the base has a buffer structure, including: the vibration isolation support comprises a fixed bottom plate, a vibration isolation air bag, a mounting base and damping support legs; the vibration isolation air bag is fixedly arranged on the fixed bottom plate; the mounting base is arranged on the vibration isolation air bag, and the excitation source is fixedly mounted on the upper part of the mounting base; one end of each damping supporting leg is arranged on the fixed base plate, the other end of each damping supporting leg is fixed to the side wall of the installation base, and the damping supporting legs are uniformly distributed on the installation base.
In one possible implementation, the lifting plate is of an annular structure; the number of the telescopic pieces is four, and the plurality of telescopic pieces are arranged around the center of the lifting support plate at equal angles; the number of the bearing guide columns is four, the bearing guide columns are arranged around the center of the lifting support plate at equal angles, and the bearing guide columns are arranged beside the extensible part and do not interfere with the extensible part.
In a possible implementation manner, the device further comprises a lifting device and a lead screw; the base is provided with four upright posts, and the longitudinal projection of the upright posts on the base is square; the lifting device is arranged on the top plane of the upright post; the lead screw is in transmission connection with the lifting device, and the bottom of the lead screw is connected to the base; the mounting table is provided with a guide through hole and a lead screw mounting hole, the guide through hole is matched with the stand column, the lead screw mounting hole is matched with the lead screw, and the mounting table penetrates through the lead screw and the guide column and is provided with a preset stroke in the longitudinal direction.
In a possible implementation manner, the outer edge of the lifting support plate is in an arc-shaped fluctuation structure, and the telescopic piece and the bearing guide column are installed at a convex position of the lifting support plate; a measuring through hole is formed in the middle of the mounting table; the measuring through hole is communicated with the lifting support plate of the annular structure, so that laser can penetrate through and irradiate the upper surface of the weight to measure excitation acceleration.
In one possible implementation, the base is a cube structure; the excitation source is arranged at the central position of the base, and the top of the excitation source is of a cylindrical structure; the sensing structure is of a cylindrical structure; the gravity compensation device, the sensing structure and the top of the excitation source are coaxially arranged.
In a possible implementation manner, the number of the screw rods is two, and the two screw rods are symmetrically arranged on two sides of the base; the device also comprises a locking device; the locking device is arranged on the mounting table and can adjust the guide through hole to clamp the upright post or not to contact with the upright post.
In one possible implementation manner, the excitation source is an electro-hydraulic servo excitation source; the sensing structure comprises a standard force sensor and a calibrated force sensor; the standard force sensor and the corrected force sensor are sequentially stacked and arranged on the top of the excitation source from bottom to top; the telescopic piece is an air spring; still include height indicator, height indicator sets up on the base for the leveling the base.
The beneficial effect of this application: the gravity compensation mechanism with the preset stroke in the longitudinal direction is additionally arranged above the sensing structure and is fixedly connected with the weight arranged on the sensing structure, the weight borne by the sensing structure is offset before the vibration of the excitation source works, the weight can be lifted together by the gravity compensation mechanism when the excitation source works in a vibration mode, the heavy-load weight is pushed, so that the large-amplitude sinusoidal force generating device can load a sinusoidal value from zero, the loading of a wide frequency band and a large-amplitude sinusoidal force is realized, moreover, a buffer structure is further arranged in the base at the lower part of the excitation source, the vibration isolation air bag and the damping supporting legs are specifically arranged between the fixed base plate and the mounting base, the energy transmitted to the foundation can be effectively reduced, the shaking of the base in the low-frequency vibration mode can be reduced, the vibration isolation effect can be realized, and the requirement of the large-amplitude sinusoidal force generating device on the mounting foundation is reduced, through the matching of the gravity compensation device and the base with the buffer structure, the dependence of an excitation source on a large foundation is reduced, and the large-amplitude sinusoidal force generation device with the foundation-free function is realized.
Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.
FIG. 1 illustrates a schematic structural diagram of a large amplitude sinusoidal force generating device according to an embodiment of the present application;
FIG. 2 illustrates an enlarged partial view of a gravity compensation device according to an embodiment of the present application;
FIG. 3 shows a schematic body diagram of a base according to an embodiment of the present application;
FIG. 4 illustrates a cross-sectional schematic view of an excitation source according to an embodiment of the present application.
Detailed Description
Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
It will be understood, however, that the terms "central," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present application or for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present application.
FIG. 1 illustrates a schematic structural diagram of a large amplitude sinusoidal force generating device according to an embodiment of the present application;
FIG. 2 illustrates an enlarged partial view of a gravity compensation device according to an embodiment of the present application; FIG. 3 shows a schematic body diagram of a base according to an embodiment of the present application; FIG. 4 shows a cross-sectional schematic view of an excitation source according to an embodiment of the application.
As shown in fig. 1 to 3, the large-amplitude sinusoidal force generating device includes: base 1, excitation source 2, the sensing structure, mount table 6 and gravity compensation device 7, excitation source 2 installs on base 1, the top at excitation source 2 is installed to the sensing structure, and the top of sensing structure is suitable for bearing weight 5, mount table 6 sets up the top at base 1, and the height that highly is higher than weight 5 of mount table 6, gravity compensation device 7 can dismantle with mount table 6 and be connected, and the lower extreme of gravity compensation device 7 can be fixed mutually with weight 5, be used for offsetting the gravity of weight 5.
In this embodiment, a gravity compensation mechanism 7 with a preset stroke in the longitudinal direction is additionally arranged above the sensing structure, the gravity compensation mechanism 7 is fixedly connected with a weight 5 arranged on the sensing structure, the weight of the weight 5 borne by the sensing structure is offset before the excitation source 2 vibrates, when the excitation source 2 vibrates, the gravity compensation mechanism 7 can lift the weight 5 together to push the heavy-load weight 5, so that the large-amplitude sinusoidal force generation device can load a sinusoidal value from zero, thereby realizing the loading of a wide frequency band and a large-amplitude sinusoidal force, furthermore, a buffer structure is arranged in the base 1 at the lower part of the excitation source 2, specifically comprising a vibration isolation air bag 13 and a damping supporting leg 14 which are arranged between a fixed bottom plate 11 and a mounting base 12, the energy transmitted to the base can be effectively reduced, and the shaking of the base 1 during low-frequency vibration is reduced, and can play the vibration isolation effect, reduce the requirement of the large amplitude sinusoidal force generating device of this application to the installation ground, cooperate with base 1 that has buffer structure through gravity compensation device 7, reduce excitation source 2 to the reliance of large ground, realize exempting from the large amplitude sinusoidal force generating device of ground function.
It is also particularly emphasized that the excitation source 2 is preferably an electro-hydraulic servo excitation source 2 comprising an actuator fixedly mounted in the centre of the base 1, a servo control system placed in a control cabinet and a hydraulic source placed on the ground for generating the required sinusoidal excitation.
As shown in FIG. 2, in one embodiment, the gravity compensation device includes a lifting plate 71, a telescopic member 73 and a connecting member 74; the lifting support plates 71 are arranged on one side of the mounting table 6 in the longitudinal direction at intervals; one end of the telescopic member 73 is fixed to the mounting table 6, the other end is fixed to the lifting support plate 71, and the telescopic member 73 has a telescopic amount in the longitudinal direction; the upper end of the connecting piece 74 is fixedly connected with the lifting support plate 71, and the lower end is fixedly connected with the weight 5.
In one embodiment, a bearing guide post 72; the bearing guide post 72 is hollow and fixedly mounted on the mounting table 6, the connecting piece 74 penetrates through the bearing guide post 72 and is fixed on the weight 5, and the connecting piece 74 and the lifting support plate 71 can move up and down in the opening direction of the bearing guide post 72.
In the above embodiment, the gravity compensation mechanism is composed of the telescopic member 73, the lifting support plate 71 and the connecting member 74, wherein the telescopic member 73 is an air spring, the lifting support plate 71 is rigidly connected with the upper end face of the weight 5 through the bearing guide post 72, the air spring is supported on the mounting table 6, when the air spring is inflated, the air spring drives the lifting support plate 71 and the weight 5 to move upwards to offset the additional load of the weight 5 on the force sensor under the action of gravity, so as to realize that the initial output of the calibrated force sensor 4 is zero, meanwhile, the lateral motion constraint of the large-mass weight 5 is realized through the bearing guide post 72 of the gravity compensation mechanism, so as to reduce the lateral vibration of the device, and the mounting table 6 is mounted on the upright post 9 and is used for providing a mounting position for the gravity compensation mechanism.
Preferably, the bearing guide post 72 is inserted into the mounting table 6, and two ends of the bearing guide post 72 respectively extend in the upper and lower directions, so that the two-way extending bearing guide post 72 effectively improves the overall structural strength of the bearing guide post 72 on the basis of reducing the transverse vibration of the weight 5.
More specifically, the lifting stay 71 may be disposed above the mounting table 6, or may be disposed at a position below the lifting stay 71, and only by ensuring that the lower end of the connecting member 74 fixed to the lifting stay 71 is fixedly connected to the weight 5, and when the weight is excited, the entire gravity compensation device is located above the weight 5, and the lifting force can be provided to the weight 5.
Preferably, the lifting support plate 71 is located above the mounting table 6, the upper end of the connecting piece 74 is fixedly inserted into the lifting support plate 71, and the lower end of the connecting piece passes through the bearing guide post 72 and the mounting table 6 and is connected to the weight 5.
Furthermore, the large-amplitude sinusoidal force generating device can realize the generation of standard sinusoidal force with the force value range of 1 kN-250 kN and the frequency range of 1 Hz-300 Hz.
As shown in fig. 3, in one embodiment, the base 1 has a buffer structure including: fixed baseplate 11, vibration isolation gasbag 13, installation base 12 and damping landing leg 14, vibration isolation gasbag 13 fixed mounting is on fixed baseplate 11, and installation base 12 sets up on vibration isolation gasbag 13, and the upper portion fixed mounting of installation base 12 has excitation source 2, and the one end setting of damping landing leg 14 is on fixed baseplate 11, and the other end is fixed to on the lateral wall of installation base 12, and the quantity of damping landing leg 14 is a plurality of, evenly lays on installation base 12.
In this embodiment, when the volume of the foundation of the existing installation site is determined and cannot be further expanded, the existing foundation can still be used for the installation and the use of the calibration device with larger range; the mounting base 12 is made of forged steel plates, and the first-order bending rigidity of the mounting base 12 is guaranteed to be far higher than the system use frequency. When the system vibrates at high frequency, the transverse vibration is small, and the influence of the bending vibration on the waveform is reduced, so that the waveform distortion degree of the force is improved.
In one embodiment, the lifting support plate 71 is a ring-shaped structure, the number of the telescopic members 73 is four, the plurality of telescopic members 73 are disposed at equal angles around the center of the lifting support plate 71, the number of the bearing guide columns is four, the plurality of bearing guide columns are disposed at equal angles around the center of the lifting support plate 71, and the bearing guide columns are disposed beside the telescopic members 73 and do not interfere with the telescopic members 73.
In one of the specific embodiments, still include hoisting device 8 and lead screw, be provided with stand 9 on the base 1, the quantity is four, the vertical projection of stand 9 on base 1 is square, hoisting device 8 sets up the top plane at stand 9, the lead screw is connected with hoisting device 8 transmission, the bottom of lead screw is connected to on the base 1, guide through hole and lead screw mounting hole have been seted up on the mount table 6, guide through hole and stand 9 phase-match, the lead screw mounting hole and lead screw phase-match, mount table 6 wears to establish on lead screw and guide post, have predetermineeing the stroke in vertical direction.
In this embodiment, a lifting device 8 is mounted on the column 9, the lifting screw of which passes through the mounting table 6 for lifting the weight 5 and the mounting table 6 to a certain height against the force of gravity.
In one embodiment, the outer edge of the lifting support plate 71 is in an arc-shaped undulating structure, the telescopic piece 73 and the bearing guide post 72 are installed at the protruding position of the lifting support plate 71, the middle part of the installation platform 6 is provided with a measuring through hole, and the measuring through hole is communicated with the lifting support plate 71 which is in an annular structure, so that laser can penetrate through and irradiate the upper surface of the weight 5 to measure excitation acceleration.
In this embodiment, the measurement through holes are formed in the mounting table 6, so that not only can the excitation acceleration be measured, but also weight reduction and material saving can be realized to a certain extent, and the cost is saved.
In another embodiment, an acceleration sensor can be directly attached to the weight 5 to measure the excitation acceleration.
In one embodiment, the base 1 is a cube structure, the excitation source 2 is installed at the central position of the base 1, the top of the excitation source 2 is a cylinder structure, the sensing structure is a cylinder structure, and the gravity compensation device 7, the sensing structure and the top of the excitation source 2 are coaxially arranged.
In one embodiment, the sensing structure comprises a standard force sensor 3 and a calibrated force sensor 4, and the standard force sensor 3 and the calibrated force sensor 4 are sequentially stacked and mounted on the top of the excitation source 2 from bottom to top.
In this embodiment, the standard force sensor 3 is fixedly mounted on the mounting surface of the electro-hydraulic servo excitation source 2, and is used for providing a reference value for measuring a large-amplitude sinusoidal force and also used for force feedback control of the electro-hydraulic servo excitation source 2. The calibrated force sensor 4 is fixedly arranged on the standard force sensor 3 and is used as a measured object, and the weight 5 is fixedly arranged on the calibrated force sensor 4 and is used as a carrier which is reproduced along with the vibration of the excitation source 2 and generates the sinusoidal force.
In one embodiment, the number of the screw rods is two, the screw rods are symmetrically arranged on two sides of the base 1, the locking device 10 is arranged on the mounting table 6, and the locking device 10 can adjust the guide through hole to clamp the upright post 9 or not to be in contact with the upright post 9.
In this embodiment, the lower end of the upright 9 is fixedly mounted on the base 1, and the upper end passes through the mounting table 6, so as to provide a locking position for the mounting table 6 and ensure that the mounting table 6 does not deviate from the vertical direction during ascending and descending.
A locking device 10 is arranged at the connecting position of the mounting platform 6 and the upright post 9 and is used for locking and keeping the mounting platform 6 at a certain height.
The weight 5 replacing device is not fixedly installed and can move on the base 1, and is used for installing, detaching and placing the weight 5 and the force sensor.
In a possible implementation, the weight 5 comprises N weights 5 with different heights, the same diameter and materials, N is an integer greater than or equal to 1, and when the large-amplitude sinusoidal force generating device is used in the application, the weights 5 with different specifications are used for providing large-amplitude sinusoidal forces with different force amplitudes.
In one embodiment, the excitation source 2 is an electro-hydraulic servo excitation source 2, and the extension member 73 is an air spring, and further includes a height indicator disposed on the base 1 for leveling the base 1.
The electro-hydraulic servo excitation source 2 is rigidly arranged in the center of the base 1, can play a certain vibration isolation role, and reduces the energy transmitted to the foundation through the base 1; four upright posts 9 are rigidly arranged at the symmetrical four corners of the base 1, and the upper ends of the upright posts penetrate through the mounting table 6, so that the mounting table 6 is ensured not to deviate from the vertical direction in the ascending and descending processes; the standard force sensor 3 and the corrected force sensor 4 are arranged back to back, the lower end of the standard force sensor 3 is fixedly arranged on the installation surface of the actuator of the electro-hydraulic servo excitation source 2, and the upper end of the corrected force sensor 4 is connected with the bottom surface of the weight 5.
More specifically, as shown in fig. 4, the present application discloses an electro-hydraulic servo excitation source, which can be used for a large-amplitude sinusoidal force generating device of the present application, and specifically includes: the device comprises a piston rod 21, an upper cylinder cover 22, a cylinder body 23, a lower cylinder cover 24, a valve block 25 and an energy accumulator 26, wherein the upper cylinder cover 22 and the lower cylinder cover 24 are respectively arranged at two ends of the cylinder body 23 from an upper end cover and a lower end cover, the lower end of the lower cylinder cover 24 is fixed to the central position of the top end face of the base 1, the piston rod 21 is matched with the cylinder body 23, a sensing structure mounting table is detachably mounted on the piston rod 21, the standard force sensor 3 and the corrected force sensor 4 are mounted at the central position of the top of the sensing structure mounting table, the valve block 25 is mounted on one side of the cylinder body 23, and the energy accumulator 26 is mounted on the valve block 25.
In the embodiment, the electro-hydraulic servo control-based hydraulic excitation system architecture and the implementation method realize the functions of high stability and high controllability of the servo valve and the hydraulic source by controlling the energy of the excitation source 2, and further realize the high repeatability and high precision control of the amplitude, the frequency and the waveform shape of the sinusoidal force. The friction between the vibration participating systems is reduced by high index and high precision requirements on the guiding, structure manufacturing precision, assembly process and the like of the actuator in the motion process, and the harmonic distortion is reduced by improving the connection rigidity. And a high-frequency-response high-flow servo valve is adopted to ensure the frequency and flow of the system. The method can adopt a form of parallel connection of double servo valves, and solves the problem of rapid attenuation of the flow of the servo valves at high frequency. The number of connecting links is reduced, and the connecting rigidity is improved. The hydraulic bypass leakage method is combined, and the hydraulic bypass leakage device has the advantage of no leakage.
It should be particularly noted that, besides the electro-hydraulic servo excitation source disclosed above, the excitation source 2 may also be implemented by using the excitation source 2 conventional in the prior art, and the selection of the excitation source 2 is not affected by the use of the gravity compensation device and the base 1 with the buffer structure in the present application, so that redundant description is not repeated herein.
In one of the specific embodiments, still include the weight 5 and change the device, the weight 5 is changed the device and is removed the weight 5 and is corrected force sensor 4 directly over, the adjustment is connected the hole site and is made the weight 5 up end be connected with the gravity compensation mechanism who installs on mount table 6, adjust the mount table 6 height through hoist mechanism, be connected the lower terminal surface of weight 5 with being corrected force sensor 4, adjust gravity compensation mechanism, offset weight 5 additional load to force sensor under the action of gravity, make by the output of correction force sensor 4 zero, fix the movable beam at this height through locking device 10, regard the state at this moment as the initial condition of calibration test.
Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. A large amplitude sinusoidal force generating device, comprising: the device comprises a base, an excitation source, a sensing structure, a mounting table and a gravity compensation device;
the excitation source is mounted on the base;
the sensing structure is arranged on the excitation source, and the top of the sensing structure is suitable for bearing weights;
the mounting table is erected and fixed above the base, and the height of the mounting table is higher than that of the weight;
the gravity compensation device with the mount table can be dismantled and be connected, just the lower extreme of gravity compensation device can with the weight is fixed mutually, is used for offsetting the gravity of weight.
2. The large amplitude sinusoidal force generating device of claim 1, wherein said gravity compensation device includes a lifting brace, a telescoping member, and a connector;
the lifting support plates are arranged on one side of the mounting table in the longitudinal direction at intervals;
one end of the telescopic piece is fixed on the mounting table, the other end of the telescopic piece is fixed on the lifting support plate, and the telescopic piece has a telescopic amount in the longitudinal direction;
the upper end of the connecting piece is fixedly connected with the lifting support plate, and the lower end of the connecting piece is fixedly connected with the weight.
3. The large amplitude sinusoidal force generating device of claim 2, further comprising a bearing guide post;
the bearing guide post is hollow and is fixedly arranged on the mounting table;
the connecting piece penetrates through the bearing guide pillar and is fixed to the weight, and the connecting piece and the lifting support plate can move up and down in the opening direction of the bearing guide pillar.
4. The high amplitude sinusoidal force generating device of claim 1, wherein said base has a cushioning structure comprising: the vibration isolation support comprises a fixed bottom plate, a vibration isolation air bag, a mounting base and damping support legs;
the vibration isolation air bag is fixedly arranged on the fixed bottom plate;
the mounting base is arranged on the vibration isolation air bag, and the excitation source is fixedly mounted on the upper part of the mounting base;
one end of each damping supporting leg is arranged on the fixed base plate, the other end of each damping supporting leg is fixed to the side wall of the installation base, and the damping supporting legs are uniformly distributed on the installation base.
5. The high amplitude sinusoidal force generating device of claim 3, wherein said lifting struts are of an annular configuration;
the number of the telescopic pieces is four, and the plurality of telescopic pieces are arranged around the center of the lifting support plate at equal angles;
the number of the bearing guide columns is four, the bearing guide columns are arranged around the center of the lifting support plate at equal angles, and the bearing guide columns are arranged beside the extensible part and do not interfere with the extensible part.
6. The large amplitude sinusoidal force generating device of claim 1, further comprising a lifting device and a lead screw;
the base is provided with four upright posts, and the longitudinal projection of the upright posts on the base is square;
the lifting device is arranged on the top plane of the upright post;
the lead screw is in transmission connection with the lifting device, and the bottom of the lead screw is connected to the base;
the mounting table is provided with a guide through hole and a lead screw mounting hole, the guide through hole is matched with the stand column, the lead screw mounting hole is matched with the lead screw, and the mounting table penetrates through the lead screw and the guide column and is provided with a preset stroke in the longitudinal direction.
7. The large amplitude sinusoidal force generating device of claim 5, wherein said lifting plate has an outer edge with an arcuate relief, said telescoping member and said bearing guide post being mounted at a raised location on said lifting plate;
a measuring through hole is formed in the middle of the mounting table;
the measuring through hole is communicated with the lifting support plate of the annular structure, so that laser can penetrate through and irradiate the upper surface of the weight to measure excitation acceleration.
8. The large amplitude sinusoidal force generating device of claim 1, wherein said base is a cube structure;
the excitation source is arranged at the central position of the base, and the top of the excitation source is of a cylindrical structure;
the sensing structure is of a cylindrical structure;
the gravity compensation device, the sensing structure and the top of the excitation source are coaxially arranged.
9. The large-amplitude sinusoidal force generating device according to claim 6, wherein the number of said screw rods is two, symmetrically arranged on both sides of said base;
the device also comprises a locking device;
the locking device is arranged on the mounting table and can adjust the guide through hole to clamp the upright post or not to contact with the upright post.
10. The large amplitude sinusoidal force generating device of any one of claims 1-9, wherein said excitation source is an electro-hydraulic servo excitation source;
the sensing structure comprises a standard force sensor and a calibrated force sensor;
the standard force sensor and the corrected force sensor are sequentially stacked and arranged on the top of the excitation source from bottom to top;
the telescopic piece is an air spring;
still include height indicator, height indicator sets up on the base for the leveling the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111664765.1A CN114459675A (en) | 2021-12-30 | 2021-12-30 | Large-amplitude sine force generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111664765.1A CN114459675A (en) | 2021-12-30 | 2021-12-30 | Large-amplitude sine force generating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114459675A true CN114459675A (en) | 2022-05-10 |
Family
ID=81406927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111664765.1A Pending CN114459675A (en) | 2021-12-30 | 2021-12-30 | Large-amplitude sine force generating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114459675A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3699808A (en) * | 1971-10-13 | 1972-10-24 | Gen Tire & Rubber Co | Dynamic testing device for visco-elastic materials |
| CN101929907A (en) * | 2010-03-23 | 2010-12-29 | 昆山市创新科技检测仪器有限公司 | Weight anti-deflection device |
| CN204214633U (en) * | 2014-11-07 | 2015-03-18 | 江西连胜实验装备有限公司 | A kind of multiaxial motion precision vibration isolation optical platform |
| CN108120549A (en) * | 2016-11-30 | 2018-06-05 | 北京航天计量测试技术研究所 | Volume range force sensor calibrating installation |
| CN110763321A (en) * | 2019-10-18 | 2020-02-07 | 福建省计量科学研究院（福建省眼镜质量检验站） | Combined type verification method for electronic hanging scale |
| CN111077015A (en) * | 2018-10-18 | 2020-04-28 | 梅特勒-托利多(常州)精密仪器有限公司 | Dead weight type force standard machine |
| CN212275196U (en) * | 2020-06-22 | 2021-01-01 | 脉创测控装备科技（苏州）有限公司 | Active impact amplifying device and system |
-
2021
- 2021-12-30 CN CN202111664765.1A patent/CN114459675A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3699808A (en) * | 1971-10-13 | 1972-10-24 | Gen Tire & Rubber Co | Dynamic testing device for visco-elastic materials |
| CN101929907A (en) * | 2010-03-23 | 2010-12-29 | 昆山市创新科技检测仪器有限公司 | Weight anti-deflection device |
| CN204214633U (en) * | 2014-11-07 | 2015-03-18 | 江西连胜实验装备有限公司 | A kind of multiaxial motion precision vibration isolation optical platform |
| CN108120549A (en) * | 2016-11-30 | 2018-06-05 | 北京航天计量测试技术研究所 | Volume range force sensor calibrating installation |
| CN111077015A (en) * | 2018-10-18 | 2020-04-28 | 梅特勒-托利多(常州)精密仪器有限公司 | Dead weight type force standard machine |
| CN110763321A (en) * | 2019-10-18 | 2020-02-07 | 福建省计量科学研究院（福建省眼镜质量检验站） | Combined type verification method for electronic hanging scale |
| CN212275196U (en) * | 2020-06-22 | 2021-01-01 | 脉创测控装备科技（苏州）有限公司 | Active impact amplifying device and system |
Non-Patent Citations (1)
| Title |
|---|
| 田峰 等: "正弦力校准装置的研制", 计测技术, vol. 41, no. 3, 28 June 2021 (2021-06-28), pages 25 - 29 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7345559B2 (en) | High field open MRI magnet isolation system and method | |
| US5310157A (en) | Vibration isolation system | |
| US9447839B2 (en) | Support module for lithography system | |
| CN100374844C (en) | Load testing machine | |
| CN100456140C (en) | Accurate vibration isolation system in use for step-by-step scanning photo-etching device | |
| CN106679786B (en) | Dead weight and stack combined type hook balance calibrating installation | |
| CN1939836B (en) | Load balance adjusting method and equipment of lifting jacks, and jack-up equipment | |
| CN114459675A (en) | Large-amplitude sine force generating device | |
| CN110531478A (en) | A kind of various dimensions precision vibration isolation optical platform | |
| JP3767324B2 (en) | Large bedrock testing equipment | |
| CN109115512B (en) | Test bed for realizing six-component force model construction method and method for measuring vector thrust | |
| CN113899513B (en) | Oil gas suspension test bench | |
| CN207923458U (en) | A kind of auto parts and components mould measurement support system | |
| CN115060480A (en) | Universal damping device test platform and control system | |
| CN214894477U (en) | Height-adjustable foundation support for loading test | |
| CN110220702B (en) | Elastic foundation beam type internal force self-balancing jack static load test bed | |
| CN202133503U (en) | Calibration device for mini-type three-dimensional force sensor | |
| CN219734074U (en) | Damping device | |
| CN210037206U (en) | Elastic-like foundation beam type internal force self-balancing jack static load test bed | |
| CN107764566A (en) | A kind of auto parts and components mould measurement support system | |
| CN218511926U (en) | Piston pressure gauge for instrument calibration | |
| CN214276850U (en) | Horizontal adjustment shockproof clamp of firing pin stroke length measuring equipment | |
| CN110468893B (en) | Floating vibration isolation foundation for high dynamic fatigue test | |
| RU2249803C1 (en) | Bench for strength testing of structure | |
| CN220418992U (en) | Pressurizing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |