Vibration parameter testing device
By using fiber grating sensors and support seats on cantilever beams, the problem of increasing mass affecting measurement accuracy is solved, and more accurate vibration parameter testing is achieved.
Patent Information
- Application Number
- CN202420895790.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-04-28
AI Technical Summary
In the prior art, when using acceleration sensors to measure the vibration parameters of cantilever beams, the sensor mass is too large, which increases the mass of the cantilever beam and affects the measurement accuracy.
The fiber grating sensor and support base are used, including vibration isolation substrate and fixing parts. The cantilever beam is fixed to the support base. The fiber grating sensor is connected to the detection point of the cantilever beam. By collecting components and the upper computer to analyze data, the vibration parameters are measured.
The fiber grating sensor is small in size and light in weight, and does not affect the quality of the cantilever beam. The test results are more accurate, avoiding the defect of traditional sensors increasing mass.
Smart Images
Figure CN222318218U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of measurement, in particular to a cantilever beam vibration parameter testing device based on optical fiber grating sensing. Background Art
[0002] At present, when studying the vibration parameters of cantilever beams, a combination of theory and experiment is usually adopted, that is, theoretical calculation is first used, and then an experimental platform is built to compare and analyze the experimental measurement results with the theoretical values. In the current related technologies, an acceleration sensor is usually used to measure the parameters of the cantilever beam. However, due to the large mass of the acceleration sensor, when the acceleration sensor is installed on the cantilever beam, the mass of the cantilever beam will increase, thereby affecting the accuracy of the measurement. Utility Model Content
[0003] In view of the above-mentioned shortcomings of the related art, the purpose of the present utility model is to provide a vibration parameter testing device.
[0004] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a vibration parameter testing device, the vibration parameter testing device comprising:
[0005] A support seat, comprising a vibration isolation substrate and a fixing member, wherein the fixing member is arranged on the vibration isolation substrate;
[0006] A cantilever beam, wherein the fixed end of the cantilever beam is connected to the support seat and is horizontally suspended, the cantilever beam extends above the vibration isolation substrate and is located within the projection of the vibration isolation substrate, and a detection point is provided on the surface of the cantilever beam;
[0007] A light sensing measuring element, connected to the detection point;
[0008] The collection component is electrically connected to the light sensing measuring component and is used to collect measurement parameters.
[0009] Optionally, the fixture is configured as a vise.
[0010] Optionally, a fixing end of the cantilever beam is provided with a slot, and the cantilever beam is connected to the vise via the slot.
[0011] Optionally, the light sensing measuring member is detachably connected to the detection point.
[0012] Optionally, the light sensing measuring member is pasted on the detection point.
[0013] Optionally, the light-sensing measuring element is configured as a fiber grating sensor, and the acquisition component is a demodulator.
[0014] Optionally, there are multiple detection points, and the multiple light-sensitive measuring parts are evenly arranged along the extension direction of the cantilever beam. There are multiple light-sensitive measuring parts, and the multiple light-sensitive measuring parts are electrically connected to the collection component and are respectively connected to the multiple detection points one by one.
[0015] Optionally, the cantilever beam is composed of multiple fiber cloth layers.
[0016] Optionally, the detection point is arranged at the center of the cantilever beam in the width direction.
[0017] Optionally, the vibration parameter testing device further includes a host computer, the acquisition component is electrically connected to the host computer, and the host computer is used to analyze the data collected by the acquisition component.
[0018] As described above, the vibration parameter testing device of the utility model has the following beneficial effects: the cantilever beam is made to vibrate freely by hammering excitation, and the optical sensing measuring component receives the signal and sends the signal to the acquisition component. The optical sensing measuring component is small in size and light in weight, has little effect on the quality of the cantilever beam, and the test result is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 Shown is a structural schematic diagram of the vibration parameter testing device of the utility model.
[0020] Figure 2 Shown is a schematic diagram of a partial structure of the vibration parameter testing device of the utility model.
[0021] Component number description
[0022] 10 Support seat
[0023] 11 Vibration isolation substrate
[0024] 12 Fixing parts
[0025] 20 Cantilever beam
[0026] 21 Checkpoints
[0027] 30 Light sensing measuring device
[0028] 40 Collection Components
[0029] 50 Host computer DETAILED DESCRIPTION
[0030] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.
[0031] See also Figure 1-Figure 2 It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the utility model, and the drawings only show the components related to the utility model rather than the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.
[0032] like Figure 1 As shown, this embodiment provides a vibration parameter testing device, which is used to test the parameters of the cantilever beam when it vibrates, so as to make a comparative analysis with the theoretical calculation.
[0033] The vibration parameter testing device includes a support seat 10, a cantilever beam 20, a light sensing measuring member 30 and a collection component 40. The fixed end of the cantilever beam 20 is connected to the support seat 10, and the cantilever beam 20 is horizontally suspended. It can be understood that the cantilever beam 20 is horizontally suspended, which means that the bottom surface of the cantilever beam 20 is not in contact with other objects. A detection point 21 is provided on the surface of the cantilever beam 20, and the detection point 21 is the position where the cantilever beam 20 is connected to the light sensing measuring member 30. The light sensing measuring member 30 is connected to the detection point 21, and the light sensing measuring member 30 is electrically connected to the collection component 40. The light sensing measuring member 30 is used to measure the vibration change of the cantilever beam 20 and send the measured parameters to the collection component 40 for analysis. By constructing the above-mentioned vibration parameter testing device, the cantilever beam 20 to be tested can be experimentally tested to obtain the measured parameters, and the operator can then compare and analyze the measured parameters with the theoretical values. The above-mentioned vibration parameter testing device provides convenience for operators to study the vibration of the cantilever beam 20.
[0034] The support base 10 includes a vibration isolation substrate 11 and a fixing member 12. The vibration isolation substrate 11 is stably arranged to prevent the vibration isolation substrate 11 from shaking during the test. The fixing member 12 is arranged on the vibration isolation substrate 11, and the fixed end of the cantilever beam 20 is connected to the fixing member 12. The cantilever beam 20 extends above the vibration isolation substrate 11 and is located within the projection of the vibration isolation substrate 11. Such an arrangement can prevent the cantilever beam 20 from being hit by the outside during the test. In the present embodiment, the fixed end of the cantilever beam 20 is detachably connected to the fixing member 12. In other embodiments, the fixed end of the cantilever beam 20 can be fixedly connected to the fixing member 12. For example, when testing cantilever beams 20 of different materials, it is convenient for operators to disassemble and replace the cantilever beam 20 by detachably connecting the cantilever beam 20 to the fixing member 12.
[0035] The fixing member 12 is configured as a vise. By using the vise, the operator can conveniently fix the cantilever beam 20. When the installation position of the cantilever beam 20 needs to be adjusted, the operator only needs to loosen the vise and readjust the cantilever beam 20. The operation is simple and quick. When it is necessary to test cantilever beams 20 of other materials or cantilever beams 20 of different lengths, the operator can also easily assemble and disassemble the cantilever beam 20 by operating the vise.
[0036] In order to make the cantilever beam 20 more firmly fixed, a clamping groove (not shown) is provided on the fixed end of the cantilever beam 20. When the cantilever beam 20 is fixed, the clamping groove is clamped on the fixed end of the vise, and then the vise is operated to make the movable end of the vise close to the fixed end of the vise to clamp and fix the cantilever beam 20.
[0037] Specifically, the cantilever beam 20 is composed of multiple layers of fiber cloth, which are laid alternately, and any two adjacent layers of fiber cloth are fixed by a glue layer, and are formed by a hot press or a common press. The cantilever beam 20 of this embodiment is made of carbon fiber composite material, and the cantilever beam 20 is made of at least two materials. In other embodiments, the cantilever beam 20 can be made of other materials, which is not limited here. The size of the cantilever beam 20 to be tested in this embodiment is 500×25×5mm. In the actual processing of the cantilever beam 20, the length of the cantilever beam 20 is usually larger than the design size, and the excess length of the cantilever beam 20 is used to connect with the support seat 10. For example, the length of the cantilever beam 20 of this embodiment is processed to 520mm, and the excess 20mm length of the cantilever beam 20 is connected to the support seat 10. At this time, the suspended length of the cantilever beam 20 is 500mm.
[0038] The optical measuring element 30 is configured as a fiber grating sensor, the wavelength of the fiber grating sensor is 1537nm, the grating area length is 10mm, the reflectivity is 90%, and the pigtail length is 1m. The fiber grating sensor has the advantages of anti-electromagnetic interference, small size, light weight and good temperature resistance. Compared with the traditional electrical measurement experiment method, the fiber grating vibration test is simpler and lighter. For example, an acceleration sensor is often used in traditional electrical measurement experiments. When the acceleration sensor is used to test the cantilever beam 20, due to the large mass of the acceleration sensor, when the acceleration sensor is installed on the cantilever beam 20, the mass of the cantilever beam 20 will increase, thereby affecting the vibration test of the cantilever beam 20.
[0039] When a hammer is used to stimulate the cantilever beam 20 to vibrate, the physical quantity sensed on the cantilever beam 20 will change, causing the wavelength of the light reflected by the optical measuring component 30 to change. The optical measuring component 30 sends the measured data to the acquisition component 40, and the acquisition component 40 analyzes the change data of the wavelength of the light, thereby achieving the purpose of testing the vibration parameters.
[0040] The light sensing measuring member 30 can be connected to the detection point 21 of the cantilever beam 20 in a fixed manner or a detachable manner, and the specific installation method depends on the situation. In this embodiment, the light sensing measuring member 30 is connected to the cantilever beam 20 by means of mounting, that is, the light sensing measuring member 30 is attached to the detection point 21 on the surface of the cantilever beam 20. The light sensing measuring member 30 is fixed by means of mounting, which is simple and quick to operate and can be removed at any time.
[0041] like Figure 1 and Figure 2 As shown, the number of detection points 21 is multiple, specifically, the number of detection points 21 is five, and the five detection points 21 are evenly arranged along the extension direction of the cantilever beam 20. The number of light sensing measuring components 30 is multiple, specifically, the number of light sensing measuring components 30 is five, and the five light sensing measuring components 30 are electrically connected to the collection component 40 and are respectively connected to the five detection points 21 in a one-to-one correspondence. By setting multiple detection points 21 on the cantilever beam 20 and using multiple light sensing measuring components 30 to measure the cantilever beam 20, the collection component 40 can collect parameter data of various parts of the cantilever beam 20 when it vibrates. In other embodiments, the number of detection points 21 can be more.
[0042] The detection point 21 may be disposed at a position according to test requirements. In the present embodiment, the detection point 21 is disposed at the center of the width of the cantilever beam 20 .
[0043] The vibration parameter testing device also includes a host computer 50. In this embodiment, the acquisition component 40 is a demodulator, and the acquisition component 40 is electrically connected to the light sensing measuring component 30, that is, the input channel of the acquisition component 40 is connected to the data terminal of the light sensing measuring component 30. The acquisition component 40 is electrically connected to the host computer 50, that is, the output channel of the acquisition component 40 is connected to the host computer 50. The acquisition component 40 is used to collect the data measured by the light sensing measuring component 30 and transmit the data to the host computer 50 for analysis. The host computer 50 can be used to process the collected dynamic data related to the time domain response and the frequency domain response, perform fitting analysis on the data, and read the frequency band peak value, that is, the corresponding natural frequency value of each order of the cantilever beam 20.
[0044] In summary, the vibration parameter testing device of the utility model comprises a support base 10, a cantilever beam 20, a light sensing measuring component 30, a collection component 40 and a host computer 50. The fixed end of the cantilever beam 20 is detachably connected to the fixing component 12 of the support base 10, and the light sensing measuring component 30 is attached to the detection point 21 on the surface of the cantilever beam 20. When the cantilever beam 20 is vibrated by hammering, the light sensing measuring component 30 measures the cantilever beam 20 and sends the measured data to the collection component 40, and the collection component 40 then sends the data to the host computer 50 for analysis.
[0045] Furthermore, by using multiple light-sensitive measuring pieces 30 to measure the cantilever beam 20, parameter information at different positions of the cantilever beam 20 can be obtained. The light-sensitive measuring piece 30 is fixed to the detection point 21 of the cantilever beam 20 by pasting, which is simple and quick to operate and convenient for assembling and disassembling the light-sensitive measuring piece 30. Since the fiber grating sensor has the advantages of small size and light weight, the fiber grating sensor is used for measurement without increasing the mass of the cantilever beam 20, thereby avoiding affecting the measurement of the cantilever beam 20.
[0046] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.
Claims
1. A vibration parameter testing device, characterized in that: The vibration parameter testing device comprises: A support seat, comprising a vibration isolation substrate and a fixing member, wherein the fixing member is arranged on the vibration isolation substrate; A cantilever beam, wherein the fixed end of the cantilever beam is detachably connected to the fixing member and is horizontally suspended, the cantilever beam extends above the vibration isolation substrate and is located within the projection of the vibration isolation substrate, and a detection point is provided on the surface of the cantilever beam; A light sensing measuring element, connected to the detection point; The collection component is electrically connected to the light sensing measuring component and is used to collect measurement parameters.
2. The vibration parameter testing device according to claim 1, characterized in that: The fixture is configured as a vise.
3. The vibration parameter testing device according to claim 2, characterized in that: A clamping slot is provided at the fixed end of the cantilever beam, and the cantilever beam is clamped to the vise table through the clamping slot.
4. The vibration parameter testing device according to claim 1, characterized in that: The light sensing measuring member is detachably connected to the detection point.
5. The vibration parameter testing device according to claim 4, characterized in that: The light sensing measuring member is pasted on the detection point.
6. The vibration parameter testing device according to claim 1, characterized in that: The light sensing measuring component is configured as a fiber grating sensor, and the acquisition component is a demodulator.
7. The vibration parameter testing device according to claim 1, characterized in that: There are multiple detection points, and the multiple light-sensitive measuring parts are evenly arranged along the extension direction of the cantilever beam. There are multiple light-sensitive measuring parts, and the multiple light-sensitive measuring parts are electrically connected to the collection component and are respectively connected to the multiple detection points one by one.
8. The vibration parameter testing device according to claim 1, characterized in that: The cantilever beam is composed of multiple fiber cloth layers.
9. The vibration parameter testing device according to claim 1, characterized in that: The detection point is set at the center of the cantilever beam in the width direction.
10. The vibration parameter testing device according to claim 1, characterized in that: The vibration parameter testing device also includes a host computer, the acquisition component is electrically connected to the host computer, and the host computer is used to analyze the data collected by the acquisition component.