CN203191067U - Vector hydrophone sound pressure and vibration velocity phase difference measuring device - Google Patents
Vector hydrophone sound pressure and vibration velocity phase difference measuring device Download PDFInfo
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- CN203191067U CN203191067U CN 201320065392 CN201320065392U CN203191067U CN 203191067 U CN203191067 U CN 203191067U CN 201320065392 CN201320065392 CN 201320065392 CN 201320065392 U CN201320065392 U CN 201320065392U CN 203191067 U CN203191067 U CN 203191067U
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Abstract
The utility model provides a vector hydrophone sound pressure and vibration velocity phase difference measuring device which comprises a vibration platform, a vibration platform controller, a signal generator, a data collection system, a supporting device, a water drum and an acceleration sensor. The signal generator is connected with the vibration platform through the vibration platform controller, the data collection system comprises an upper position machine and a data collection instrument which are connected together, the acceleration sensor is connected with the data collection instrument, and the supporting device comprises a vibration seat which is fixed on a vibration head of the vibration platform. Vibrational excitation is generated by using the vibration platform, phase differences between a sound pressure hydrophone and a vibration velocity sensor in the vertical direction and the horizontal direction are respectively obtained, an operation process of manually adding modification values to measured parameters is not needed, and the process of measuring various parameters of the vector hydrophone is effectively simplified; and because the vector hydrophone sound pressure and vibration velocity phase difference measuring device is simple in structure and low in manufacture cost, the vector hydrophone sound pressure and vibration velocity phase difference measuring device be popularized and used easily.
Description
Technical field
The utility model relates to a kind of measurement mechanism, relates in particular to a kind of vector hydrophone acoustic pressure vibration velocity phase difference measuring apparatus.
Background technology
Vibration velocity type vector hydrophone can obtain acoustic pressure scalar information and the three-dimensional vector vibration velocity information at certain some place in the sound field synchronously, and because its dipole directive property and frequency-independent, low frequency signal is had very strong detectability, and therefore closely decades, vector hydrophone drew attention rapidly in the target detection field.And utilize vector hydrophone to carry out the allied signal treatment technology of the bound acoustic pressure of target detection and vibration velocity, this wherein, the phase differential of acoustic pressure and vibration velocity signal is one of very important parameter in this Combined Treatment technology just.Because influence of various factors such as starting material, manufacture craft, production environment, can there be certain phasic difference in response for same signal between pressure hydrophone and the vibration velocity sensor, in order to guarantee the accuracy of later stage information processing, must accurately measure this parameter.At present, not forming unified standard as yet at the phase differential between vector hydrophone acoustic pressure and the vibration velocity sensor, is the standing wave tube mensuration and domestic relevant each parameter of vector hydrophone mainly adopts.Put into the boundary condition of Guan Zhonghui influence pipe sound field when but the method is measured along with vector hydrophone, influence the sound field in the pipe.Sound field information then must add a modified value in measured parameter in order to obtain accurately, but obtaining of this modified value need obtain from a large amount of measurement data, and this makes to measure and becomes loaded down with trivial details unusually.
Summary of the invention
Technical problem to be solved in the utility model is: a kind of vector hydrophone acoustic pressure vibration velocity phase difference measuring apparatus is provided, solve the loaded down with trivial details defective of each parameter measurement process of vector hydrophone in the prior art, realize conveniently each parameter of vector hydrophone being measured by vector hydrophone acoustic pressure vibration velocity phase difference measuring apparatus.
The technical scheme that the utility model provides is that a kind of vector hydrophone acoustic pressure vibration velocity phase difference measuring apparatus comprises: shaking table, shaking table controller, signal generator, data acquisition system (DAS), bracing or strutting arrangement, water drum and acceleration transducer; Described signal generator is connected with described shaking table by described shaking table controller, described data acquisition system (DAS) comprises host computer and the data collecting instrument that links together, described acceleration transducer is connected with described data collecting instrument, described bracing or strutting arrangement involving vibrations seat, described vibration seat is fixed on the vibration head of described shaking table; When the vertical direction vibration velocity sensor of vector hydrophone and pressure hydrophone are carried out phase difference measurement, described vibration head vertically arranges, described water drum and described vector hydrophone are separately fixed at the both ends of described vibration seat, described pressure hydrophone is arranged in described water drum, described acceleration transducer is fixed on the middle part of described vibration seat, and described pressure hydrophone is connected with described data collecting instrument respectively with described vertical direction vibration velocity sensor; When the horizontal direction vibration velocity sensor to described vector hydrophone carries out phase difference measurement, described vibration head is horizontally disposed with, described acceleration transducer and described vector hydrophone are separately fixed at the both ends of described vibration seat, and described horizontal direction vibration velocity sensor is connected with described data collecting instrument.
Further, described bracing or strutting arrangement also comprises sliding seat, and described sliding seat is provided with slide rail; When the horizontal direction vibration velocity sensor of described vector hydrophone was carried out phase difference measurement, described vibration seat was slidingly connected on the slide rail.
The vector hydrophone acoustic pressure vibration velocity phase difference measuring apparatus that the utility model provides, by utilizing shaking table to produce vibrational excitation, obtain pressure hydrophone on vertical direction and the horizontal direction and the phase differential between the vibration velocity sensor respectively, need not artificially the parameter that records to be added modified value, effective simplification the measuring process of each parameter of vector hydrophone, and since vector hydrophone acoustic pressure vibration velocity phase difference measuring apparatus simple in structure, manufacturing cost is lower, and its easier quilt popularize to be used.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is in the structural representation that vertical direction is measured for the utility model vector hydrophone acoustic pressure vibration velocity phase difference measuring apparatus embodiment;
Fig. 2 is in the structural representation that horizontal direction is measured for the utility model vector hydrophone acoustic pressure vibration velocity phase difference measuring apparatus embodiment;
Fig. 3 is the structural representation of bracing or strutting arrangement among the utility model vector hydrophone acoustic pressure vibration velocity phase difference measuring apparatus embodiment.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model embodiment clearer, below in conjunction with the accompanying drawing among the utility model embodiment, technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1-Figure 3, present embodiment vector hydrophone acoustic pressure vibration velocity phase difference measuring apparatus comprises: shaking table 1, shaking table controller 2, signal generator 3, data acquisition system (DAS) 4, bracing or strutting arrangement 5, water drum 6 and acceleration transducer 7; Signal generator 3 is connected with shaking table 1 by shaking table controller 2, data acquisition system (DAS) 4 comprises host computer 41 and the data collecting instrument 42 that links together, acceleration transducer 7 is connected with data collecting instrument 42, bracing or strutting arrangement 5 involving vibrations seats 51, vibration seat 51 is fixed on the vibration head 11 of shaking table 1; When the vertical direction vibration velocity sensor 81 of vector hydrophone 8 and pressure hydrophone 82 are carried out phase difference measurement, vibration head 11 vertically arranges, water drum 6 and vector hydrophone 8 are separately fixed at the both ends of vibration seat 51, pressure hydrophone 82 is arranged in water drum 6, acceleration transducer 7 is fixed on the middle part of vibration seat 51, and pressure hydrophone 82 is connected with data collecting instrument 42 respectively with vertical direction vibration velocity sensor 81; When the horizontal direction vibration velocity sensor 83 to vector hydrophone 8 carries out phase difference measurement, vibration head 11 is horizontally disposed with, acceleration transducer 7 and vector hydrophone 8 are separately fixed at the both ends of vibration seat 51, and horizontal direction vibration velocity sensor 83 is connected with data collecting instrument 42.
Particularly, present embodiment vector hydrophone acoustic pressure vibration velocity phase difference measuring apparatus sends simple signal by signal generator 3 to shaking table controller 2, and shaking table controller 2 is converted to the vibration that control signal control shaking table 1 produces corresponding frequencies with simple signal.The measuring principle of present embodiment vector hydrophone acoustic pressure vibration velocity phase difference measuring apparatus is: utilize shaking table 1 to produce excitation, obtain respectively in the vertical direction and pressure hydrophone 82 on the horizontal direction and the phase differential between vertical direction vibration velocity sensor 81 and the horizontal direction vibration velocity sensor 83 by measuring.With reference to Fig. 1, the liquid-column height L in water drum 6 can regard fluid column as the waveguide of one dimension acoustic line greater than under the diameter 2a situation, and plane wave propagation is only arranged in the water drum 6.Can calculate acoustic pressure in the water drum 6 thus
(in the formula,
Be Media density,
Be the velocity of sound in the liquid, L is liquid-column height, and h is pressure hydrophone degree of depth in water, a is the acceleration of base, and v is the vibration velocity of base, and k is wave number), by this acoustic pressure derivation formula as can be known, the acceleration a same-phase of desirable sound pressure signal p and excitation, and more leading than the vibration velocity signal v phase place of excitation
Therefore, can cut its fixed skew again by gathering under the identical excitation sound pressure signal and vibration velocity signal and the phase place of two signals being done poor
, obtain the phase differential between pressure hydrophone 82 and the vibration velocity sensor, namely
(in the formula,
With
Be respectively pressure hydrophone signal phase and this frequency place a certain direction vibration velocity sensor signal phase place at a certain frequency place); Also can pass through the relative method principle, first acquisition process draws the phase differential of pressure hydrophone under the identical excitation 82 and acceleration transducer 7
(in the formula,
Acceleration transducer 7 signal phases for a certain frequency place), obtain phase differential between this acceleration transducer 7 and the horizontal direction vibration velocity sensor 83 again
, the phase differential that then can obtain pressure hydrophone 82 and vibration velocity sensor is
Adopt above-mentioned first method to measure pressure hydrophone 82 and vertical direction vibration velocity sensor 81 phase differential, adopt the phase differential of 83 of above-mentioned comparative method for measuring pressure hydrophone 82 and horizontal direction vibration velocity sensors.Concrete, when the vertical direction vibration velocity sensor 81 of vector hydrophone 8 and pressure hydrophone 82 are carried out phase difference measurement, vibration head 11 vertically arranges, vector hydrophone 8 and water drum 6 are fixed in by being rigidly connected on the vibration seat 51 and reach with shaking when guaranteeing to measure, with acquisition pressure hydrophone 82 and vertical direction vibration velocity sensor 81 phase differential, and the phase differential of pressure hydrophone 82 and acceleration transducer 7.And when the horizontal direction vibration velocity sensor 83 to vector hydrophone 8 carries out phase difference measurement, with water drum 6 from 51 dismountings of vibration seat down, and vibration head 11 is horizontally disposed with, obtaining the phase differential between acceleration transducer 7 and the horizontal direction vibration velocity sensor 83, and then according to formula
, calculate the phase differential of 83 of pressure hydrophone 82 and horizontal direction vibration velocity sensors, realize simple and fast vector hydrophone 8 is measured, simplified the process of measuring.
Further, in the horizontal direction can be along sliding vibration in order to make the vibration seat, present embodiment bracing or strutting arrangement 5 also comprises sliding seat 52, sliding seat 52 is provided with slide rail 521; When the horizontal direction vibration velocity sensor 83 of vector hydrophone 8 was carried out phase difference measurement, vibration seat 51 was slidingly connected on the slide rail 521.Concrete, in the process of horizontal survey and vertical survey, being connected between vibration 51 and the shaking table 1 is different.When carrying out vertical survey, vibration seat 51 four threaded holes by the centre are fixed on the vibration head 11 of shaking table 1, the left side threaded hole of vibration seat 51 is used for fixing installs the water drum 6 that is filled with water, the right then is used for installing vector hydrophone 8, and acceleration transducer 7 is vertically mounted on vibration seat 51 middle positions.When carrying out horizontal survey, need lay down water drum 6, shaking table 1 horizontal positioned, vibration this moment seat 51 is slidingly connected on the slide rail 521, in order to reduce the influence to vibration, slide rail 521 should be smooth as much as possible, and the right-hand member of vibration seat 51 is connected with the vibration head 11 of shaking table 1, and acceleration transducer 7 levels are installed in the left end of vibration seat 51.
The concrete steps that present embodiment vector hydrophone acoustic pressure vibration velocity phase difference measuring apparatus is measured comprise:
Step 1, opening signal generator and shaking table controller, adjusting control shaking table produces frequency and is
Vibrational excitation;
Step 2, the vertical Z direction vibration velocity sensor of vector hydrophone is carried out phase difference measurement with pressure hydrophone: the vertical Z direction vibration velocity sensor of adjusting vector hydrophone is identical with the direction of vibration of shaking table, obtains pressure hydrophone under this frequent rate and the phase differential between vertical Z direction vibration velocity sensor by host computer
, and pressure hydrophone and acceleration transducer between phase differential
Step 4, the horizontal Y-direction vibration velocity sensor of vector hydrophone is carried out phase difference measurement with pressure hydrophone: the horizontal Y-direction vibration velocity sensor of adjusting vector hydrophone is identical with the direction of vibration of shaking table, obtains horizontal Y-direction vibration velocity sensor under this frequent rate and the phase differential between the acceleration transducer by host computer
, according to formula
, calculate acquisition
Further, in order to obtain phase differential under the different frequency to obtain the phase differential frequency response curve, step 1 is specially: by signal generator and shaking table controller, regulate the control shaking table and produce frequency successively and be
,
Vibrational excitation, wherein,
,
Be the added value of setting in advance;
Step 2 is specially: measure the phase differential that obtains between pressure hydrophone and vertical Z direction vibration velocity sensor
,
, and the phase differential between pressure hydrophone and acceleration transducer
,
, and according to
,
Be plotted in the phase differential frequency response curve on the Z direction;
Step 4 is specially: measure the phase differential that obtains between horizontal Y-direction vibration velocity sensor and the acceleration transducer
,
, according to formula
, calculate acquisition
,
, and according to
,
Be plotted in the phase differential frequency response curve on the Y-direction.
The vector hydrophone acoustic pressure vibration velocity phase difference measuring apparatus that the utility model provides, by utilizing shaking table to produce vibrational excitation, obtain pressure hydrophone on vertical direction and the horizontal direction and the phase differential between the vibration velocity sensor respectively, need not artificially the parameter that records to be added modified value, effective simplification the measuring process of each parameter of vector hydrophone, and since vector hydrophone acoustic pressure vibration velocity phase difference measuring apparatus simple in structure, manufacturing cost is lower, and its easier quilt popularize to be used.
It should be noted that at last: above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit; Although with reference to previous embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (2)
1. a vector hydrophone acoustic pressure vibration velocity phase difference measuring apparatus is characterized in that, comprising: shaking table, shaking table controller, signal generator, data acquisition system (DAS), bracing or strutting arrangement, water drum and acceleration transducer; Described signal generator is connected with described shaking table by described shaking table controller, described data acquisition system (DAS) comprises host computer and the data collecting instrument that links together, described acceleration transducer is connected with described data collecting instrument, described bracing or strutting arrangement involving vibrations seat, described vibration seat is fixed on the vibration head of described shaking table;
When the vertical direction vibration velocity sensor of vector hydrophone and pressure hydrophone are carried out phase difference measurement, described vibration head vertically arranges, described water drum and described vector hydrophone are separately fixed at the both ends of described vibration seat, described pressure hydrophone is arranged in described water drum, described acceleration transducer is fixed on the middle part of described vibration seat, and described pressure hydrophone is connected with described data collecting instrument respectively with described vertical direction vibration velocity sensor;
When the horizontal direction vibration velocity sensor to described vector hydrophone carries out phase difference measurement, described vibration head is horizontally disposed with, described acceleration transducer and described vector hydrophone are separately fixed at the both ends of described vibration seat, and described horizontal direction vibration velocity sensor is connected with described data collecting instrument.
2. vector hydrophone acoustic pressure vibration velocity phase difference measuring apparatus according to claim 1 is characterized in that described bracing or strutting arrangement also comprises sliding seat, and described sliding seat is provided with slide rail; When the horizontal direction vibration velocity sensor of described vector hydrophone was carried out phase difference measurement, described vibration seat was slidingly connected on the slide rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320065392 CN203191067U (en) | 2013-02-05 | 2013-02-05 | Vector hydrophone sound pressure and vibration velocity phase difference measuring device |
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|---|---|---|---|
| CN 201320065392 CN203191067U (en) | 2013-02-05 | 2013-02-05 | Vector hydrophone sound pressure and vibration velocity phase difference measuring device |
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| CN 201320065392 Withdrawn - After Issue CN203191067U (en) | 2013-02-05 | 2013-02-05 | Vector hydrophone sound pressure and vibration velocity phase difference measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105225A (en) * | 2013-02-05 | 2013-05-15 | 山东省科学院海洋仪器仪表研究所 | Device and method for measuring phase difference between vector hydrophone sound pressure and vibration velocity |
| CN104568112A (en) * | 2014-12-26 | 2015-04-29 | 南通康盛医疗器械有限公司 | Sound pressure sensitivity and directivity testing device for medical hydrophone |
-
2013
- 2013-02-05 CN CN 201320065392 patent/CN203191067U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105225A (en) * | 2013-02-05 | 2013-05-15 | 山东省科学院海洋仪器仪表研究所 | Device and method for measuring phase difference between vector hydrophone sound pressure and vibration velocity |
| CN103105225B (en) * | 2013-02-05 | 2014-09-24 | 山东省科学院海洋仪器仪表研究所 | Device and method for measuring phase difference between vector hydrophone sound pressure and vibration velocity |
| CN104568112A (en) * | 2014-12-26 | 2015-04-29 | 南通康盛医疗器械有限公司 | Sound pressure sensitivity and directivity testing device for medical hydrophone |
| CN104568112B (en) * | 2014-12-26 | 2017-06-06 | 南通康盛医疗器械有限公司 | A kind of medical acoustic pressure sensitivity of hydrophone and directivity test device |
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Granted publication date: 20130911 Effective date of abandoning: 20140924 |
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| AV01 | Patent right actively abandoned |
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