CN203466956U - Amplitude and phase variable double-resonance sound wave generator - Google Patents
Amplitude and phase variable double-resonance sound wave generator Download PDFInfo
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- CN203466956U CN203466956U CN201320492691.2U CN201320492691U CN203466956U CN 203466956 U CN203466956 U CN 203466956U CN 201320492691 U CN201320492691 U CN 201320492691U CN 203466956 U CN203466956 U CN 203466956U
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Abstract
The utility model provides an amplitude and phase variable double-resonance sound wave generator. Two standing wave tubes are connected via a connector, two ends at the same side of the two standing wave tubes are connected with one loudspeaker mounting cover, and two loudspeaker units are respectively arranged in the two loudspeaker mounting covers; four installing holes are symmetrically formed in the upper and lower of a connector body; two standard microphones are respectively mounted in one upper installing hole and one lower installing hole in a skew symmetric manner, and two microphones of a sound intensity probe are respectively mounted in the other upper installing hole and the other lower installing hole in the skew symmetric manner; the two microphones of the sound intensity probe are connected via a connector of the sound intensity probe, and one of the microphones of the sound intensity probe is connected in a bending rod manner; and the two standard microphones are connected with a measurement amplifier, and a data acquisition system is connected with the measurement amplifier. The generator of the utility model can synchronously control sound pressure signals, in a wide frequency range, at any amplitude ratio and with any phase difference output by two paths of resonant sound-wave signals, can simulate the sound-intensity-level signals in the frequency range of 50-2000Hz and dynamic scope of 80-130dB, and is used for calibrating a sound intensity measuring instrument.
Description
Technical field
The utility model relates to acoustic metrology, is specifically related to a kind of double resonance sonic generator of variable amplitude phase place.
Background technology
According to the requirement in < < JJG992-2004 sound-intensity measuring device vertification regulation > >, the sound intensity can be measured in any sound field, while measuring the sound intensity stationary background noise on the acoustical power of equipment under test without any impact, for radiation mode and the auditory localization of work place study complex vibration machinery.The operation principle of sound-intensity measuring device as shown in Figure 1.Two microphones keep fixed range d, and sinusoidal acoustic signals is successively through two microphones, and the sound pressure signal amplitude phase place therefore measuring is all unequal, and the sound intensity between two microphones can be calculated by formula 1:
In formula: the effective value that P1, P2 are sinusoidal sound pressure signal;
φ, ω are respectively two phase difference and angular frequencies between sound pressure signal;
ρ
0, d is respectively atmospheric density and two microphone spacing.
Existing collimation technique, adopt pistonphone as 251Hz sound source, in sound intensity coupling cavity, be divided into upper and lower two chambers, centre is coupled element and separates, the sound pressure level that makes upper and lower two chambers is 118dB mutually, phase difference is 13.2 ° of fixed values, and the simulation nominal clearance 118dB sound intensity level that is 50mm can be used for calibrating sound-intensity measuring device.Use the shortcoming of this calibration steps to be: 1, sound pressure signal frequency is fixing can not change, and can not realize wide frequency range calibration; 2, sound intensity level dynamic range is limited, can only realize the sound intensity calibration of 118dB; 3, upper and lower two chamber sound pressure levels and phase difference are fixing non-adjustable, cannot realize other operating mode calibrations; 4, the distortion factor is larger, reaches more than 1%.
Summary of the invention
The utility model overcomes the deficiencies in the prior art part, a kind of double resonance sonic generator of amplitude-variable phase is provided, can export wide frequency ranges, any amplitude than the sound pressure signal of phase difference by Synchronization Control two-way resonant acoustic wave signal, sound intensity level signal that can analog frequency scope 50～2000Hz, dynamic range 80～130dB is used for calibrating sound-intensity measuring device, thereby has overcome pistonphone and sound intensity coupling cavity frequency is fixed, dynamic range is limited, phase place is non-adjustable, the distortion factor is large shortcoming.
Realize the technical scheme of the utility model object: a kind of double resonance sonic generator of amplitude-variable phase, this device comprises 2 loud speaker mounting cups, 2 standing wave tubes, connector, sound intensity probe, sound intensity probe connector, sound-intensity measuring device, 2 standard microphones, measuring amplifier, data acquisition system, signal source, power amplifier, loudspeaker unit; Wherein, 2 standing wave tubes connect by connector, at the two ends of standing wave tube, connect respectively a loud speaker mounting cup, and 2 loudspeaker units are separately positioned in 2 loud speaker mounting cups; Connector body up and down respectively symmetry offer 4 installing holes; 2 standard microphones respectively skew symmetry are arranged in upper and lower 2 installing holes, 2 microphones of sound intensity probe also respectively skew symmetry be arranged in upper and lower 2 installing holes of residue; Sound intensity probe connector connects two microphones of sound intensity probe, and wherein a microphone adopts knee mode to connect; Measuring amplifier connects 2 standard microphones, and data acquisition system connects measuring amplifier.
The double resonance sonic generator of a kind of amplitude-variable phase as above, the signal source described in it connects power amplifier, and power amplifier also connects two loudspeaker units.
The double resonance sonic generator of a kind of amplitude-variable phase as above, the standing wave tube internal diameter described in it is 20～200mm, and external diameter is 30～220mm, and length is 200mm～800mm.
The double resonance sonic generator of a kind of amplitude-variable phase as above, the loudspeaker unit diameter range described in it is 100～350mm.
Effect of the present utility model is: the double resonance sonic generator of amplitude-variable phase described in the utility model, can export wide frequency ranges, any amplitude than the sound pressure signal of phase difference by Synchronization Control two-way resonant acoustic wave signal, sound intensity level signal that can analog frequency scope 50～2000Hz, dynamic range 80～130dB is used for calibrating sound-intensity measuring device, thereby has overcome pistonphone and sound intensity coupling cavity frequency is fixed, dynamic range is limited, phase place is non-adjustable, the distortion factor is large shortcoming.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of sound-intensity measuring device;
Fig. 2 is the double resonance sonic generator structural representation of a kind of amplitude-variable phase described in the utility model.
In figure: 1---loud speaker mounting cup; 2---standing wave tube; 3---sound intensity probe; 4---sound intensity probe connector; 5---sound-intensity measuring device; 6---standard microphone; 7---measuring amplifier; 8---resonant acoustic wave controller; 9---signal source; 10---loudspeaker unit; 11---power amplifier; 12---connector.
Embodiment
Below in conjunction with the drawings and specific embodiments, the double resonance sonic generator of a kind of variable amplitude phase place described in the utility model is further described.
As shown in Figure 2, the double resonance sonic generator of a kind of variable amplitude phase place described in the utility model, it comprises 1,2 standing wave tubes 2 of 2 loud speaker mounting cups, connector 12, sound intensity probe 3, sound intensity probe connector 4,5,2 standard microphones 6 of sound-intensity measuring device, measuring amplifier 7, data acquisition system 8, signal source 9, power amplifier 11, loudspeaker unit 10;
Wherein, 2 standing wave tubes 2 connect by connector 12, connect respectively 1,2 loudspeaker unit 10 of a loud speaker mounting cup be separately positioned in 2 loud speaker mounting cups 1 at the two ends of standing wave tube 2; Connector 12 bodies up and down respectively symmetry offer 4 installing holes; 2 standard microphones 6 respectively skew symmetry are arranged in upper and lower 2 installing holes, 2 microphones of sound intensity probe 3 also respectively skew symmetry be arranged in upper and lower 2 installing holes of residue; Sound intensity probe connector 4 connects two microphones of sound intensity probe 3, and wherein a microphone adopts knee mode to connect; Measuring amplifier 7 connects 2 standard microphones 6, and data acquisition system 8 connects measuring amplifier 7.Signal source 9 connects power amplifier 11, and power amplifier 11 also connects two loudspeaker units 10.
The double resonance sonic generator of variable amplitude phase place described in the utility model, loudspeaker unit 10 sends normal frequency sound wave, by standing wave tube, forms standing wave resonance sound field, and the distortion factor reduces and forms loud potential source; Standing wave tube inside diameter ranges is 20～200mm, and external diameter is 30～220mm, and length range is 200mm～800mm; Loudspeaker unit diameter range is: 100～350mm.
The utility model is owing to adopting the double resonance sound wave generation technique of amplitude-variable phase, break through the calibrating principle of pistonphone, can produce the relevant resonance sound pressure signal of binary channels, sound pressure level can be adjusted to arbitrarily 80～130dB, phase difference adjustable extent is-180 degree～180 degree; Signal distortion <1%; Frequency of utilization scope: 50Hz～2000Hz.
Claims (4)
1. a double resonance sonic generator for amplitude-variable phase, is characterized in that: described double resonance sonic generator comprises 2 loud speaker mounting cups (1), 2 standing wave tubes (2), connector (12), sound intensity probe (3), sound intensity probe connector (4), sound-intensity measuring device (5), 2 standard microphones (6), measuring amplifier (7), data acquisition system (8), signal source (9), power amplifier (11), loudspeaker unit (10);
Wherein, 2 standing wave tubes (2) connect by connector (12), at the two ends of standing wave tube (2), connect respectively a loud speaker mounting cup (1), and 2 loudspeaker units (10) are separately positioned in 2 loud speaker mounting cups (1); Connector (12) body up and down respectively symmetry offer 4 installing holes; 2 standard microphones (6) respectively skew symmetry are arranged in upper and lower 2 installing holes, 2 microphones of sound intensity probe (3) also respectively skew symmetry be arranged on residue upper and lower 2 installing holes in; Sound intensity probe connector (4) connects two microphones of sound intensity probe (3), and wherein a microphone adopts knee mode to connect; Measuring amplifier (7) connects 2 standard microphones (6), and data acquisition system (8) connects measuring amplifier (7).
2. the double resonance sonic generator of a kind of amplitude-variable phase according to claim 1, is characterized in that: described signal source (9) connects power amplifier (11), and power amplifier (11) also connects two loudspeaker units (10).
3. the double resonance sonic generator of a kind of amplitude-variable phase according to claim 1 and 2, is characterized in that: described standing wave tube (2) internal diameter is 20～200mm, and external diameter is 30～220mm, and length is 200mm～800mm.
4. the double resonance sonic generator of a kind of amplitude-variable phase according to claim 1 and 2, is characterized in that: described loudspeaker unit (10) diameter range is 100～350mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320492691.2U CN203466956U (en) | 2013-08-13 | 2013-08-13 | Amplitude and phase variable double-resonance sound wave generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320492691.2U CN203466956U (en) | 2013-08-13 | 2013-08-13 | Amplitude and phase variable double-resonance sound wave generator |
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| CN203466956U true CN203466956U (en) | 2014-03-05 |
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| CN201320492691.2U Expired - Lifetime CN203466956U (en) | 2013-08-13 | 2013-08-13 | Amplitude and phase variable double-resonance sound wave generator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860403A (en) * | 2017-10-26 | 2018-03-30 | 西北工业大学 | A kind of linearisation output intent of mode localization sensor |
| CN108375371A (en) * | 2018-01-11 | 2018-08-07 | 西北工业大学 | A kind of four-degree-of-freedom weak coupling resonance type accelerometer based on mode localization effect |
| CN105444874B (en) * | 2015-11-10 | 2018-10-26 | 株洲时代新材料科技股份有限公司 | A kind of sound intersity measurement calibrating installation and method |
| CN110473514A (en) * | 2019-08-02 | 2019-11-19 | 红河学院 | A kind of device and method obtaining Standing Waves of Finite Amplitude |
-
2013
- 2013-08-13 CN CN201320492691.2U patent/CN203466956U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105444874B (en) * | 2015-11-10 | 2018-10-26 | 株洲时代新材料科技股份有限公司 | A kind of sound intersity measurement calibrating installation and method |
| CN107860403A (en) * | 2017-10-26 | 2018-03-30 | 西北工业大学 | A kind of linearisation output intent of mode localization sensor |
| CN107860403B (en) * | 2017-10-26 | 2019-12-27 | 西北工业大学 | Linear output method of modal localization sensor |
| CN108375371A (en) * | 2018-01-11 | 2018-08-07 | 西北工业大学 | A kind of four-degree-of-freedom weak coupling resonance type accelerometer based on mode localization effect |
| CN110473514A (en) * | 2019-08-02 | 2019-11-19 | 红河学院 | A kind of device and method obtaining Standing Waves of Finite Amplitude |
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Granted publication date: 20140305 |