CN103033258A - Remote high-directivity low-frequency sound wave transmission and measurement device and method - Google Patents
Remote high-directivity low-frequency sound wave transmission and measurement device and method Download PDFInfo
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- CN103033258A CN103033258A CN 201210532224 CN201210532224A CN103033258A CN 103033258 A CN103033258 A CN 103033258A CN 201210532224 CN201210532224 CN 201210532224 CN 201210532224 A CN201210532224 A CN 201210532224A CN 103033258 A CN103033258 A CN 103033258A
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Abstract
The invention discloses a remote high-directivity low-frequency sound wave transmission and measurement device and a method. The device comprises a computer, a signal processor, an acoustics parametric array, a sound level meter and a data acquisition card; the computer is sequentially connected with the data acquisition card, the signal processor and the acoustics parametric array through wires to form a sound wave transmission system; the sound level meter is sequentially connected with the data acquisition card and the computer through wires to form a sound wave measurement system; a high-directivity high-frequency sound wave is transmitted by the sound wave transmission system, a low-frequency sound wave is generated on a to-be-detected reference position, and a sound wave frequency and a sound pressure level amplitude on the to-be-detected reference position are detected by a sound pressure level detector. The remote high-directivity low-frequency sound wave transmission and measurement device and the method can achieve remote and high-directivity transmission and real-time measurement of a low-frequency sound wave.
Description
Technical field
The present invention relates to the acoustic sounding technical field, especially a kind of emission of remote high directivity low-frequency sound wave and measurement mechanism and method.
Background technology
Remote high directivity low-frequency sound wave lift-off technology has broad application prospects in the acoustic sounding technical field, also is the difficult problem of acoustic sounding field of engineering technology always.The directive property of high frequency sound wave (such as ultrasound wave) is strong, but decay seriously is difficult to carry out distance transmission and propagation in air; In air, decay less but stronger divergence characterization is arranged of low-frequency sound wave.Existing acoustic parametric arrays can be realized the emission function of remote high directivity high frequency sound wave under certain condition, and produce the sound wave of low frequency in a certain position of transmit direction, but lack the acoustic detector of frequency detecting and the intensity detection aspect of matching used low-frequency sound wave.There is no at present special-purpose remote high directivity low-frequency sound wave emission and measurement mechanism.
A typical remote high directivity low-frequency sound wave emission should comprise high directivity acoustic emission system and frequency of sound wave and sound pressure level amplitude measurement system with measurement mechanism, and the present invention launches for this gordian technique just.
Summary of the invention
The object of the invention is to overcome the problem that there is no at present the aspects such as special-purpose remote high directivity low-frequency sound wave emission and measurement mechanism, the emission of a kind of remote high directivity low-frequency sound wave and measurement mechanism and method are provided, can realize emission and the measurement of remote high directivity low-frequency sound wave.
For achieving the above object, the present invention adopts following technical proposals:
A kind of remote high directivity low-frequency sound wave emission and measurement mechanism, comprise computing machine, signal processor, acoustic parametric arrays, sound meter and data collecting card, it is characterized in that: described computing machine connects described data collecting card, described signal processor and described acoustic parametric arrays by wire successively, the acoustic emission system of formation; Described sound meter connects described data collecting card and described computing machine, the sound wave measuring system of formation by wire successively.
A kind of remote high directivity low-frequency sound wave emission and measuring method adopt above-mentioned remote high directivity low-frequency sound wave emission to carry out emission and the measurement of remote high directivity low-frequency sound wave with measurement mechanism, and concrete steps are as follows:
(1) computing machine is passed through wire connection data capture card, signal processor and acoustic parametric arrays successively, consist of the high frequency sound wave emission coefficient of high directivity;
(2) acoustic parametric arrays sounding port is aimed at reference position to be measured;
(3) sound meter is placed reference position to be measured, and sound meter is passed through wire connection data capture card and computing machine, consist of the measuring system of frequency of sound wave and sound pressure level amplitude;
(4) sending difference frequency by computing machine is low frequency
f 0Two row high_frequency sine wave signals, successively by sending the sinusoidal sound wave of high directivity by acoustic parametric arrays behind data collecting card and the signal processor;
(5) frequency of sound wave that sound meter is recorded and sound pressure level amplitude show in computing machine in real time, record;
(6) change distance and the direction of acoustic parametric arrays reference position relatively to be measured, measure frequency to sound meter and be
f 0And the sound pressure level amplitude reaches the sound wave of maximum value;
(7) frequency of surveying is
f 0And the sound wave that the sound pressure level amplitude reaches maximum value is remote high directivity low-frequency sound wave emission and the remote high directivity low-frequency sound wave of measurement mechanism towards reference position to be measured emission and measurement.
The present invention compared with prior art, have following apparent outstanding substantive distinguishing features and remarkable advantage: computing machine, signal processor, acoustic parametric arrays, sound meter and data collecting card are used in combination, have solved the problem of aspects such as there is no at present special-purpose remote high directivity low-frequency sound wave emission and measurement mechanism; And apparatus structure is simple, and the all-bottom sound wave energy of emission satisfies the remote and high requirement of pointing to, and can measure in real time frequency of sound wave and the sound pressure level amplitude of reference position to be measured.
Description of drawings
Fig. 1 is remote high directivity low-frequency sound wave emission of the present invention and measurement mechanism structural representation.
Fig. 2 is emission and the measuring process block diagram of remote high directivity low-frequency sound wave.
Embodiment
The preferred embodiments of the present invention are discussed below by reference to the accompanying drawings:
Referring to Fig. 1, a kind of remote high directivity low-frequency sound wave emission and measurement mechanism, comprise computing machine 101, signal processor 102, acoustic parametric arrays 103, sound meter 104 and data collecting card 105, described computing machine 101 connects described data collecting card 105, described signal processor 102 and described acoustic parametric arrays 103 by wire successively, the acoustic emission system of formation; Described sound meter 104 connects described data collecting card 105 and described computing machine 101, the sound wave measuring system of formation by wire successively.
Referring to Fig. 2, a kind of remote high directivity low-frequency sound wave emission and measuring method adopt above-mentioned remote high directivity low-frequency sound wave emission to carry out emission and the measurement of remote high directivity low-frequency sound wave with measurement mechanism, and concrete steps are as follows:
(1) computing machine 101 is passed through wire connection data capture card 105, signal processor 102 and acoustic parametric arrays 103 successively, consist of the high frequency sound wave emission coefficient of high directivity;
(2) acoustic parametric arrays 103 sounding ports are aimed at reference position 106 to be measured;
(3) sound meter 104 is placed reference position 106 to be measured, and sound meter 104 is passed through wire connection data capture card 105 and computing machine 101, consist of the measuring system of frequency of sound wave and sound pressure level amplitude;
(4) sending difference frequency by computing machine 101 is low frequency
f 0Two row high_frequency sine wave signals, successively by sending the sinusoidal sound wave of high directivity by acoustic parametric arrays 103 behind data collecting card 105 and the signal processor 102;
(5) frequency of sound wave that sound meter 104 is recorded and sound pressure level amplitude show in computing machine 101 in real time, record;
(6) change distance and the direction of acoustic parametric arrays 103 reference position 106 relatively to be measured, measure frequency to sound meter 104 and be
f 0And the sound pressure level amplitude reaches the sound wave of maximum value;
(7) frequency of surveying is
f 0And the sound wave that the sound pressure level amplitude reaches maximum value is remote high directivity low-frequency sound wave emission and the remote high directivity low-frequency sound wave of measurement mechanism towards reference position to be measured 106 emissions and measurement.
The acoustic parametric arrays 103 of using in the present embodiment and signal processor 102 adopt 24 inches audio spotlight ultrasound transducer arrays (24-in diameter Audio Spotlight ultrasonic transducer array) and the processing amplifier (Processor/Amplifier) supporting with it of being produced by U.S. Holosonics company; The NI-PXI multichannel data acquisition system that data collecting card adopts American National instrument (NI) company limited to produce; The BSWA801 sound meter that sound meter adopts Beijing Sheng Wang Acoustic-Electric (BSWA) Technology Co., Ltd. to produce.
Claims (2)
1. a remote high directivity low-frequency sound wave is launched and measurement mechanism, comprise computing machine (101), signal processor (102), acoustic parametric arrays (103), sound meter (104) and data collecting card (105), it is characterized in that: described computing machine (101) connects described data collecting card (105), described signal processor (102) and described acoustic parametric arrays (103), the acoustic emission system of formation by wire successively; Described sound meter (104) connects described data collecting card (105) and described computing machine (101), the sound wave measuring system of formation by wire successively.
2. a remote high directivity low-frequency sound wave is launched and measuring method, adopts remote high directivity low-frequency sound wave emission according to claim 1 and measurement mechanism, it is characterized in that concrete steps are as follows:
(1) computing machine (101) is passed through wire connection data capture card (105), signal processor (102) and acoustic parametric arrays (103) successively, consist of the high frequency sound wave emission coefficient of high directivity;
(2) acoustic parametric arrays (103) sounding port is aimed at reference position to be measured (106);
(3) sound meter (104) is placed reference position to be measured (106), and sound meter (104) is passed through wire connection data capture card (105) and computing machine (101), consist of the measuring system of frequency of sound wave and sound pressure level amplitude;
(4) sending difference frequency by computing machine (101) is low frequency
f 0Two row high_frequency sine wave signals, successively by sending the sinusoidal sound wave of high directivity by acoustic parametric arrays (103) behind data collecting card (105) and the signal processor (102);
(5) frequency of sound wave that sound meter (104) is recorded and sound pressure level amplitude show in computing machine (101) in real time, record;
(6) change distance and the direction of acoustic parametric arrays (103) reference positions relatively to be measured (106), measure frequency to sound meter (104) and be
f 0 And the sound pressure level amplitude reaches the sound wave of maximum value;
(7) frequency of surveying is
f 0 And the sound wave that the sound pressure level amplitude reaches maximum value is remote high directivity low-frequency sound wave emission and the remote high directivity low-frequency sound wave of measurement mechanism towards reference position to be measured (106) emission and measurement.
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| CN 201210532224 CN103033258A (en) | 2012-12-12 | 2012-12-12 | Remote high-directivity low-frequency sound wave transmission and measurement device and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713283A (en) * | 2013-12-18 | 2014-04-09 | 中国船舶重工集团公司第七二六研究所 | Method for realizing arraying of parametric receiving array |
| CN103994814A (en) * | 2014-05-12 | 2014-08-20 | 上海大学 | Landmine multi-modal vibration mode measurement device and method |
| CN104698449A (en) * | 2015-03-31 | 2015-06-10 | 清华大学苏州汽车研究院（吴江） | Ultrasonic directivity testing system |
| CN106596728A (en) * | 2016-11-05 | 2017-04-26 | 上海大学 | High-directivity low-frequency sound wave transmission and measurement device and method |
-
2012
- 2012-12-12 CN CN 201210532224 patent/CN103033258A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713283A (en) * | 2013-12-18 | 2014-04-09 | 中国船舶重工集团公司第七二六研究所 | Method for realizing arraying of parametric receiving array |
| CN103713283B (en) * | 2013-12-18 | 2016-02-24 | 中国船舶重工集团公司第七二六研究所 | Parameter receives the implementation method of battle array composition basic matrix |
| CN103994814A (en) * | 2014-05-12 | 2014-08-20 | 上海大学 | Landmine multi-modal vibration mode measurement device and method |
| CN103994814B (en) * | 2014-05-12 | 2016-04-27 | 上海大学 | The multi-modal vibration shape measurement mechanism of land mine and measuring method |
| CN104698449A (en) * | 2015-03-31 | 2015-06-10 | 清华大学苏州汽车研究院（吴江） | Ultrasonic directivity testing system |
| CN106596728A (en) * | 2016-11-05 | 2017-04-26 | 上海大学 | High-directivity low-frequency sound wave transmission and measurement device and method |
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Application publication date: 20130410 |