CN209170659U - The loudspeaker vibration component resonant frequency measuring device motivated using vibration excitor - Google Patents
The loudspeaker vibration component resonant frequency measuring device motivated using vibration excitor Download PDFInfo
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- CN209170659U CN209170659U CN201920153648.0U CN201920153648U CN209170659U CN 209170659 U CN209170659 U CN 209170659U CN 201920153648 U CN201920153648 U CN 201920153648U CN 209170659 U CN209170659 U CN 209170659U
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- resonant frequency
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Abstract
The utility model proposes a kind of loudspeaker vibration component resonant frequency measuring device motivated using vibration excitor, which includes measurement bracket, vibration excitor, fixture, acceleration transducer, laser displacement sensor and linear guide.Three vibration excitors are fixed on measurement bracket bottom end, and fixture is fixed on above vibration excitor, and acceleration transducer is mounted on fixture.Linear guide is mounted on measurement cantilever tip, and laser displacement sensor is fixed in linear guide.The utility model is used to measure the resonant frequency f of loudspeaker vibration component (including cone, vibrating diaphragm and centring disk etc.)0.The utility model can accurately measure the acceleration (including amplitude and phase) of tested vibration component outer ring fixed part actual vibration, it can ensure that the tested vibration component clamped by fixture stationary vibration up and down within the scope of measurement frequency, to accurately measure to obtain the resonant frequency of tested vibration component.
Description
Technical field
The utility model belongs to electroacoustic techniques application field, is related to a kind of loudspeaker vibration component motivated using vibration excitor
Resonant frequency measuring device.Loudspeaker vibration component (including cone, vibrating diaphragm and centring disk can measure using this measuring device
Deng) resonant frequency, can be widely applied to loudspeaker vibration part quality and examine (control), loudspeaker design and research and development.
Background technique
Loudspeaker is an electricity-power-acoustical coupling system, mainly by magnetic circuit system, vibrational system and support auxiliary system
Three parts composition.Main component of the vibration component of loudspeaker as loudspeaker sounding, its resonant frequency are its weights
One of technical indicator is wanted, which plays a crucial role the overall performance of loudspeaker.
Current existing resonance frequency of loudspeaker measuring device, there are some problems, may cause measurement result in structure
Not accurate enough or measurement result is not sufficiently stable.The utility model proposes a kind of new measuring devices, it can accurately be measured by vibration measuring
The acceleration (including amplitude and phase) of dynamic component outer ring fixed part actual vibration, it can be ensured that by fixture clamp by vibration measuring
Dynamic component stationary vibration up and down within the scope of measurement frequency, thus accurately measure to obtain tested speaker vibration component (including
Cone, vibrating diaphragm and centring disk etc.) resonant frequency.
Utility model content
The purpose of this utility model is to design a kind of loudspeaker vibration component resonant frequency measuring motivated using vibration excitor
Device, it can relatively accurately measure the resonant frequency of loudspeaker vibration component (including cone, vibrating diaphragm and centring disk etc.).
The scheme that the utility model patent uses is:
The utility model proposes it is a kind of using vibration excitor motivate loudspeaker vibration component resonant frequency measuring device, packet
Measurement bracket, vibration excitor, fixture, acceleration transducer, laser displacement sensor and linear guide, the vibration excitor is included to be set to
It measures on bracket, the fixture is set on vibration excitor, and the acceleration transducer is set on fixture, the laser displacement
Sensor is set on measurement bracket.
The measurement bracket is a cube frame, and the laser displacement sensor is fixed on measurement bracket
Portion, the measurement laser beam that the laser displacement sensor issues are directed toward a certain fixed point of tested speaker vibration component.Institute
The fixture stated is made of lower clamp plate in a pair, and the common held tight of upper and lower plywoods is tested the outside of vibration component；The fixture
It is fixed on vibration excitor；The vibration excitor be set to measurement bracket lower part, the acceleration transducer at least three and
Near the fixture and tested vibration component contact position, each acceleration transducer is not at same straight line
On.Each acceleration transducer is in angular distribution in fixture outer edge, is bonded respectively with three vibration excitors, described
Three vibration excitors are set in vibration excitor frame on the horizontal level in horizontal, and the direction of excitation of each vibration excitor is vertically upward.Described
Tested vibration component includes diffuser, vibrating diaphragm and centring disk.
The design of this measuring device is careful, full-featured, it can be ensured that the tested vibration component clamped by fixture is in measurement frequency
Stationary vibration up and down within the scope of rate, to accurately measure to obtain the resonant frequency of tested vibration component.
Detailed description of the invention
Fig. 1 measuring device schematic elevation view
Fig. 2 measuring device left view schematic diagram
The right schematic top plan view of Fig. 3 measuring device
Fig. 4 measuring device schematic rear view
Fig. 5 measuring device schematic top plan view
Fig. 6 measuring device main body schematic diagram
Fig. 7 vibration excitor fixes position view
Fig. 8 fixture schematic cross-sectional view
Specific embodiment
With reference to the accompanying drawing and specific embodiment is further described the measuring device of the utility model.
As shown in Figures 1 to 7, loudspeaker vibration component resonant frequency measuring device described in the utility model includes measurement
Bracket (1), vibration excitor (2), fixture (3), acceleration transducer (4), laser displacement sensor (5) and linear guide (6) etc..Three
Vibration excitor (2) is fixed on measurement bracket (1) bottom end, and fixture (3) is fixed on above vibration excitor (2), in the top of the fixture (3)
It is also equipped with three acceleration transducers (4)；Linear guide (6) is mounted on measurement bracket (1) top, laser displacement sensor
(5) it is fixed on linear guide (6).
The measurement bracket (1) is a cube frame, is equipped with one group for placing and fixing exciting in its bottom end
The crossbeam (7) of device (2), top are equipped with one for installing the crossbeam (8) of linear guide；In the square frame of bottom end and four
Between vertical beam, it is mounted with a damping block (9) respectively.Three vibration excitors (2) are horizontal positioned and are fixed on the crossbeam (7) of bottom end
On, crossbeam (7) can front and back adjust its horizontal position, three vibration excitors (2), which can control, adjusts its horizontal position, in this way, solid
Be scheduled on vibration excitor (2) on crossbeam (7) can front and rear, left and right it is mobile, with the different size of fixture of fixation.Linear guide (6)
It is mounted on the crossbeam (8) on top, laser displacement sensor (5) is fixed on linear guide (6)；The horizontal position of crossbeam (8)
Can control adjustment, the horizontal position of linear guide (6) can front and back adjustment, laser displacement sensor (5) can be led by straight line
Rail (6) moves up and down, in this way, the laser displacement sensor (5) being fixed on linear guide (6) can upper and lower, front and back and a left side
It moves right, meets the focusing requirement of different distance, different location.The laser beam that laser displacement sensor (5) issues steadily refers to
To a certain fixed point of tested speaker vibration component.
As shown in figure 8, fixture (3) is made of upper clamp plate (10) and lower clamp plate (11), fixture (3) is generally circular；In circle
It is opened on the outer of clamp (3) there are three through-hole, the through-hole that 3 screws are each passed through from top to bottom on fixture (3) is fixed
On the axle center of 3 vibration excitors (2), it is mounted with 3 acceleration transducers (4) respectively on the top of 3 screws.
Finally, it should be noted that: above embodiments are only to illustrate the utility model rather than limit the utility model institute
The technical solution of description；Therefore, although this specification is described in detail the utility model referring to the above embodiments,
It is, it will be understood by those of skill in the art that still can modify to the utility model or equivalent replacement；And all do not take off
The technical solution and its improvement of spirit and scope from utility model, should all cover the scope of the claims in the utility model
In the middle.
Claims (5)
1. a kind of loudspeaker vibration component resonant frequency measuring device motivated using vibration excitor, including measurement bracket, feature
It is that the measuring device further includes vibration excitor, fixture, acceleration transducer, laser displacement sensor and linear guide, it is described
Vibration excitor is set on measurement bracket, and the fixture is set on vibration excitor, and the acceleration transducer is set on fixture, straight line
Guide rail is set on measurement bracket, and laser displacement sensor is set in linear guide.
2. loudspeaker vibration component resonant frequency measuring device according to claim 1, it is characterised in that the measurement
Bracket is a cube frame, and linear guide is mounted on measurement cantilever tip.
3. loudspeaker vibration component resonant frequency measuring device according to claim 1, feature is in the vibration excitor
It is horizontally arranged and is fixed on the crossbeam of measurement bracket bottom end, linear guide is mounted on the crossbeam of measurement cantilever tip.
4. loudspeaker vibration component resonant frequency measuring device according to claim 1, it is characterised in that the fixture
It is made of lower clamp plate in a pair, the common held tight of upper and lower plywoods is tested the outside of vibration component；The fixture is fixed on sharp
It shakes on device；The vibration excitor is set on the lower part of measurement bracket, the acceleration transducer at least three and set on described
Fixture and tested vibration component contact position near, each acceleration transducer is not on same straight line.
5. loudspeaker vibration component resonant frequency measuring device according to claim 1, it is characterised in that described is tested
Vibration component includes diffuser, vibrating diaphragm and centring disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920153648.0U CN209170659U (en) | 2019-01-29 | 2019-01-29 | The loudspeaker vibration component resonant frequency measuring device motivated using vibration excitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920153648.0U CN209170659U (en) | 2019-01-29 | 2019-01-29 | The loudspeaker vibration component resonant frequency measuring device motivated using vibration excitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209170659U true CN209170659U (en) | 2019-07-26 |
Family
ID=67328889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920153648.0U Active CN209170659U (en) | 2019-01-29 | 2019-01-29 | The loudspeaker vibration component resonant frequency measuring device motivated using vibration excitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209170659U (en) |
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2019
- 2019-01-29 CN CN201920153648.0U patent/CN209170659U/en active Active
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