CN202453075U - Device for eliminating vibration noise of vibration velocity hydrophone - Google Patents
Device for eliminating vibration noise of vibration velocity hydrophone Download PDFInfo
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- CN202453075U CN202453075U CN2011205615502U CN201120561550U CN202453075U CN 202453075 U CN202453075 U CN 202453075U CN 2011205615502 U CN2011205615502 U CN 2011205615502U CN 201120561550 U CN201120561550 U CN 201120561550U CN 202453075 U CN202453075 U CN 202453075U
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- velocity hydrophone
- hydrophone
- monitoring sensor
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Abstract
The utility model discloses a device for eliminating vibration noise of a vibration velocity hydrophone, which is characterized in that a vibration monitoring sensor, a signal conditioning circuit and a differential amplifying circuit are adopted to counteract the interference of the vibration noise of an underwater platform on the vibration velocity hydrophone, so as to improve the measuring accuracy of the vibration velocity hydrophone; the signal conditioning circuit is adopted for adjusting the amplification times of the output signals of the vibration monitoring sensor and the vibration velocity hydrophone, so that the measurement accuracy of the vibration velocity hydrophone is greatly improved; and a rheostat is connected between the signal output end and the negative input end of an operational amplifier connected with the vibration monitoring sensor by a cable, so that a user can adjust the amplification times of the operational amplifier at any moment according to the actual demands. Therefore, the device is practical, convenient and flexible.
Description
Technical field
The utility model relates to velocity hydrophone, is specifically related to a kind of device that velocity hydrophone is installed on rigidity, non-steady underwater platform vibration noise that is used to eliminate.
Background technology
The application of velocity hydrophone on underwater sound equipment is increasingly extensive; But for a long time; When on non-stability underwater platform, installing and using velocity hydrophone; Owing to receive the influence that non-steady platform self vibration noise disturbs, limited the practical effect of velocity hydrophone, its main cause is: what the main sensitive element of the inner pick-up parts of velocity hydrophone adopted is vibration transducer; And whole pick-up parts be through spring suspension on support and then be fixed in mounting platform under water; Because self instability receives external force effect such as ocean current when vibration takes place, parts such as the suspension holdfast of this vibration through velocity hydrophone, spring are coupled on the main sensitive element of nautical receiving set pick-up parts, produce noise signal when underwater platform.This noise signal is superimposed upon on the useful acoustic signals that velocity hydrophone obtains in addition, has formed interference.
The utility model content
In view of this, the utility model provides a kind of device that is used to eliminate the velocity hydrophone vibration noise, can offset the interference of the vibration noise of underwater platform to velocity hydrophone.
The utility model a kind of is used to eliminate the device of the vibration noise of velocity hydrophone, comprises that velocity hydrophone, vibration monitoring sensor, sensor install adapted seat, signal conditioning circuit, differential amplifier circuit and signal cable:
Said velocity hydrophone is fixed on the outside surface of underwater platform, is used to survey the acoustic signals of the sound field under water that contains vibration noise;
Said sensor is installed adapted seat and is fastened on the inwall of underwater platform;
Said sensor is installed adapted seat and is processed by rigid material;
The vibration monitoring sensor adopts the three axis accelerometer identical with velocity hydrophone as sensitive element, is used to survey the vibration signal of underwater platform; The vibration monitoring sensor is fixedly mounted on sensor and installs on the adapted seat, and the direction of pairing three axles of the three axis accelerometer in the direction of three axles of the three axis accelerometer in the vibration monitoring sensor and the velocity hydrophone is consistent;
Said signal conditioning circuit is installed in underwater platform inside, and it is provided with two signal input P1 and P2, two signal output O1 and O2; Wherein signal input P1 links to each other with the signal output part of vibration monitoring sensor through signal cable, and receives the vibration signal of the underwater platform of vibration monitoring sensor output; Signal input P2 links to each other with the signal output part of velocity hydrophone through the signal cable that passes underwater platform, and receives the acoustic signals of the sound field under water that contains vibration noise of velocity hydrophone output;
Signal conditioning circuit amplifies A1 doubly with the vibration signal of underwater platform, and the acoustic signals that will contain the sound field under water of vibration noise amplifies A2 and exports through signal output O1 and O2 respectively after doubly;
Said A1 and A2 satisfy A1=Au A2, and the multiple Au that wherein gains is under air ambient, and velocity hydrophone and vibration monitoring sensor are to the ratio of the measured value of the amplitude of same vibration signal;
Definite method of said gain multiple Au is: in air, with magneto-electric vibrational excitation platform device is applied significantly vibration force; With the range value of the output signal that obtains velocity hydrophone range value, promptly obtain the multiple Au that gains divided by the vibration monitoring signal of sensor.
The operational amplifier that it is AD820 that said signal conditioning circuit adopts two models respectively amplifies velocity hydrophone and vibration monitoring signal of sensor.
The resistance of between the negative input end of the operational amplifier that links to each other with the vibration monitoring sensor and signal output part, connecting is variable resistor, is used to adjust the enlargement factor of this operational amplifier.
The signal input part of the operational amplifier in the said signal conditioning circuit and signal output part are connected in series respectively into an electric capacity.
Two input ports of said differential amplifier circuit connect two signal outputs of signal conditioning circuit respectively, and amplify output again after two paths of signals asked difference.
The difference instrument amplifier that said differential amplifier circuit employing model is AD620AN carries out the difference processing and amplifying to two paths of signals.
A kind of device that is used to eliminate the velocity hydrophone vibration noise that the utility model provides; Adopt vibration monitoring sensor, signal conditioning circuit and differential amplifier circuit to offset, improved the accuracy of measurement of velocity hydrophone thus the interference of the vibration noise of underwater platform to velocity hydrophone; Adopt signal conditioning circuit that the enlargement factor of the output signal of vibration detecting sensor and velocity hydrophone is adjusted, the measuring accuracy of velocity hydrophone is increased substantially; Between the signal output part of the operational amplifier that links to each other with the vibration monitoring sensor and negative input end, being connected a rheostat through cable, is the enlargement factor that the user can adjust this operational amplifier according to actual needs at any time, makes this device practical and convenient flexible.
Description of drawings
Fig. 1 is a kind of schematic representation of apparatus that is used to eliminate the velocity hydrophone vibration noise of the utility model;
Fig. 2 is signal conditioning circuit and the catenation principle figure of differential amplifier circuit among the embodiment of the utility model.
Wherein, 1-velocity hydrophone, 1a-spring, 1b-support, 2-underwater platform, 3-vibration monitoring sensor, 4-sensor are installed adapted seat, 5-signal cable, 6-differential amplifier circuit, 7-signal conditioning circuit.
Embodiment
Below in conjunction with the accompanying drawing embodiment that develops simultaneously, the utility model is described in detail.
The utility model provides a kind of device of eliminating the vibration noise of velocity hydrophone, and what be installed in cylindric underwater platform with three-dimensional velocity hydrophone below is that exemplary embodiments is come concrete narration:
As shown in Figure 1, underwater platform 2 cylindraceous has the pressurized capsule body of rigidity stiffening rib, approximate for inside.After the assembled such as the spring 1a of velocity hydrophone 1, support 1b; Be fixedly mounted on the upper surface of underwater platform 2; It is inner that the signal cable 5 of the signal output part of velocity hydrophone 1 through watertight introduced the cabin body with signal, and link to each other with the input end of the inner signal conditioning circuit 7 of cabin body; Vibration monitoring sensor 3 is installed adapted seat 4 through sensor and is fastened on the cabin body inwall of underwater platform 2, and realizes being electrically connected through signal cable 5 and signal conditioning circuit 7; After velocity hydrophone 1 output signal process signal conditioning circuit 7 amplification filtering, be input to the signal input part of differential amplifier circuit 6; Be input to the signal input part of differential amplifier circuit 6 after the amplification of the signal that vibration monitoring sensor 3 perceives through signal conditioning circuit 7 certain multiple; Differential amplifier circuit 6 carries out the signal of the velocity hydrophone 1 of two ends input and the signal of vibration monitoring sensor 3 to amplify output behind the subtraction.
As shown in Figure 2; The catenation principle figure of signal conditioning circuit 7 and differential amplifier circuit 6: signal conditioning circuit 7 is AD820 by model operational amplifier U7, U8 and resistance, electric capacity etc. constitute two passage forward amplifiers; Wherein C42, C43, C44, C45 are capacitances, and resistance R 32, R35 are impedance matching resistance, and resistance R 30, R34 are current-limiting resistances; Variable resistor R33, resistance R 31 are feedback resistances
Wherein, The positive signal input end of operational amplifier U7 (No. 3 pins) links to each other with the signal output part of vibration detecting sensor; Variable resistor R33 connects between negative signal input end (No. 2 pins) and the signal output part (No. 6 pins); Negative signal input end (No. 2 pins) with through resistance R 30 ground connection, then the enlargement factor of operational amplifier U7 is A1=1+R33/R30;
The positive signal input end of operational amplifier U8 (No. 3 pins) links to each other with the signal output part of velocity hydrophone 1; Resistance in series R31 between negative signal input end (No. 2 pins) and the signal output part (No. 6 pins); Negative signal input end (No. 2 pins) and earth terminal resistance in series R34, then the enlargement factor of operational amplifier U8 is A2=1+R31/R34;
The signal output part of operational amplifier U7 (No. 6 pins) connects the negative signal input end (No. 2 pins) of difference instrument amplifier U2, and the signal output part of operational amplifier U8 (No. 6 pins) connects the positive signal input end (No. 3 pins) of difference instrument amplifier U2; Difference instrument amplifier U2 amplifies doubly back output of A3 after above two signals are asked difference.
At the positive signal input end series capacitance C43 of operational amplifier U7, the signal output part series capacitance C42 of operational amplifier U7; At the positive signal input end series capacitance C45 of operational amplifier U8,, be used for direct current signal in the filtering circuit at the signal output part series capacitance C44 of operational amplifier U8.
Because the signal that velocity hydrophone 1 detects comprises two parts: the acoustic signals of propagating in a part of sound field under water is useful signal; Another part is the vibration signal of the underwater platform of coming through the spring 1a of self and support 1b coupling 2 self, be noise interferences, and this part noise interferences can be surveyed equally by vibration monitoring sensor 3.Therefore, can offset noise with the output signal of velocity hydrophone 1 and the output signal subtraction of vibration monitoring sensor 3 this moment.Because velocity hydrophone 1 is spring 1a and the be coupled vibration signal of the underwater platform of coming 2 self of support 1b; And the vibration signal of vibration detecting sensor to be sensor through rigidity install underwater platform that adapted seat 4 surveys to be obtained 2 self; Therefore, because material is different with mode of vibration, deviation will appear in the amplitude of the vibration signal of underwater platform that both detect 2 self; For eliminating this deviation; Just be necessary that the enlargement factor with vibration monitoring sensor 3 multiply by a gain multiple Au, make velocity hydrophone 1 and vibration monitoring sensor 3 detect to such an extent that the amplitude of same vibration signal is identical, definite method of this multiple that gains is following:
In air with system according to top step install connect finish after; Multimeter--magneto-electric vibrational excitation platform provides the vibrational excitation signal of certain frequency and amplitude with vibration; Observe the output signal of the velocity hydrophone of installing on the underwater platform 21 and the output signal of vibration monitoring sensor 3, write down the amplitude of two kinds of signals respectively, the ratio of signal calculated amplitude; This ratio is gain coefficient Au; The enlargement factor A2 of operational amplifier U8 multiply by gain coefficient Au, promptly obtains the enlargement factor A1 of operational amplifier U7, and both sides relation can be expressed as: A1=Au A2;
According to
and relation between the two; Can confirm the resistance of variable resistor R33:
is under different service conditions; Adjust variable resistor according to the actual gain coefficient Au that records and be connected into the resistance in the circuit; Its amplitude that in certain frequency range, guarantees two kinds of signals is equated, realized thus Noise Suppression and counteracting.
In sum, more than being merely the preferred embodiment of the utility model, is not the protection domain that is used to limit the utility model.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (6)
1. device that is used to eliminate the vibration noise of velocity hydrophone; It is characterized in that, comprise velocity hydrophone (1), vibration monitoring sensor (3), sensor installation adapted seat (4), signal conditioning circuit (7), differential amplifier circuit (6) and signal cable (5):
Said velocity hydrophone (1) is fixed on the outside surface of underwater platform, is used to survey the acoustic signals of the sound field under water that contains vibration noise;
Said sensor is installed adapted seat (4) and is fastened on the inwall of underwater platform;
Vibration monitoring sensor (3) adopts the three axis accelerometer identical with velocity hydrophone as sensitive element, is used to survey the vibration signal of underwater platform; Vibration monitoring sensor (3) is fixedly mounted on sensor and installs on the adapted seat (4), and the direction of pairing three axles of the three axis accelerometer in the direction of three axles of the three axis accelerometer in the vibration monitoring sensor (3) and the velocity hydrophone (1) is consistent;
Said signal conditioning circuit (7) is installed in underwater platform inside, and it is provided with two signal input P1 and P2, two signal output O1 and O2; Wherein signal input P1 links to each other with the signal output part of vibration monitoring sensor (3) through signal cable (5), and receives the vibration signal of the underwater platform of vibration monitoring sensor (3) output; Signal input P2 links to each other with the signal output part of velocity hydrophone (1) through the signal cable (5) that passes underwater platform, and receives the acoustic signals of the sound field under water that contains vibration noise of velocity hydrophone (1) output;
Signal conditioning circuit (7) amplifies A1 times of back through signal output O1 output with the vibration signal of underwater platform; The acoustic signals that signal conditioning circuit (7) will contain the sound field under water of vibration noise amplify A2 doubly after respectively through signal output O2 output;
Said A1 and A2 satisfy A1=Au A2, and the multiple Au that wherein gains is under air ambient, and velocity hydrophone (1) and vibration monitoring sensor (3) are to the ratio of the measured value of the amplitude of same vibration signal;
Two input ports of said differential amplifier circuit (6) connect two signal outputs of signal conditioning circuit (7) respectively, and amplify output to receiving again after the two paths of signals that comes is asked difference.
2. a kind of device that is used to eliminate the vibration noise of velocity hydrophone as claimed in claim 1 is characterized in that, it is that the difference instrument amplifier of AD620AN carries out the difference processing and amplifying to two paths of signals that said differential amplifier circuit (6) adopts model.
3. a kind of device that is used to eliminate the vibration noise of velocity hydrophone as claimed in claim 1 is characterized in that said sensor is installed adapted seat (4) and processed by rigid material.
4. a kind of device that is used to eliminate the vibration noise of velocity hydrophone as claimed in claim 1; It is characterized in that the operational amplifier that it is AD820 that said signal conditioning circuit (7) adopts two models respectively amplifies the output signal of velocity hydrophone (1) and vibration monitoring sensor (3).
5. a kind of device that is used to eliminate the vibration noise of velocity hydrophone as claimed in claim 4; It is characterized in that; The resistance of between the negative input end of the operational amplifier that links to each other with vibration monitoring sensor (3) and signal output part, connecting is variable resistor, is used to adjust the enlargement factor of this operational amplifier.
6. a kind of device that is used to eliminate the vibration noise of velocity hydrophone as claimed in claim 4 is characterized in that the signal input part of the operational amplifier in the said signal conditioning circuit (7) and signal output part are connected in series respectively into an electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205615502U CN202453075U (en) | 2011-12-29 | 2011-12-29 | Device for eliminating vibration noise of vibration velocity hydrophone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205615502U CN202453075U (en) | 2011-12-29 | 2011-12-29 | Device for eliminating vibration noise of vibration velocity hydrophone |
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| CN202453075U true CN202453075U (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011205615502U Withdrawn - After Issue CN202453075U (en) | 2011-12-29 | 2011-12-29 | Device for eliminating vibration noise of vibration velocity hydrophone |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494758A (en) * | 2011-12-29 | 2012-06-13 | 中国船舶重工集团公司第七一○研究所 | Apparatus for eliminating interference of vibration noise on velocity hydrophone |
| CN103471700A (en) * | 2013-09-02 | 2013-12-25 | 中国船舶重工集团公司第七一〇研究所 | Compound type scalar vector hydrophone |
| CN105987751A (en) * | 2015-02-09 | 2016-10-05 | 常熟海量声学设备科技有限公司 | Sensor for detecting 2D vibration velocity and sound pressure of water medium |
| CN107703822A (en) * | 2017-10-27 | 2018-02-16 | 安徽建筑大学 | A kind of washing machine Multi-parameter Automatic Examination System and vibrational state data processing method |
| CN109764951A (en) * | 2018-12-29 | 2019-05-17 | 中国船舶重工集团公司第七一0研究所 | The vibration coupling noise elimination apparatus of vibration velocity vector hydrophone on a kind of mooring mine platform |
| CN110940968A (en) * | 2019-12-16 | 2020-03-31 | 西北工业大学 | Low-frequency low-noise piezoelectric vector sensor |
-
2011
- 2011-12-29 CN CN2011205615502U patent/CN202453075U/en not_active Withdrawn - After Issue
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494758A (en) * | 2011-12-29 | 2012-06-13 | 中国船舶重工集团公司第七一○研究所 | Apparatus for eliminating interference of vibration noise on velocity hydrophone |
| CN103471700A (en) * | 2013-09-02 | 2013-12-25 | 中国船舶重工集团公司第七一〇研究所 | Compound type scalar vector hydrophone |
| CN103471700B (en) * | 2013-09-02 | 2015-09-30 | 中国船舶重工集团公司第七一〇研究所 | Compound type scalar vector hydrophone |
| CN105987751A (en) * | 2015-02-09 | 2016-10-05 | 常熟海量声学设备科技有限公司 | Sensor for detecting 2D vibration velocity and sound pressure of water medium |
| CN107703822A (en) * | 2017-10-27 | 2018-02-16 | 安徽建筑大学 | A kind of washing machine Multi-parameter Automatic Examination System and vibrational state data processing method |
| CN107703822B (en) * | 2017-10-27 | 2023-12-22 | 安徽建筑大学 | Washing machine vibration state data processing method |
| CN109764951A (en) * | 2018-12-29 | 2019-05-17 | 中国船舶重工集团公司第七一0研究所 | The vibration coupling noise elimination apparatus of vibration velocity vector hydrophone on a kind of mooring mine platform |
| CN109764951B (en) * | 2018-12-29 | 2020-11-27 | 中国船舶重工集团公司第七一0研究所 | Vibration coupling noise elimination device of vibration velocity vector hydrophone on anchor mine platform |
| CN110940968A (en) * | 2019-12-16 | 2020-03-31 | 西北工业大学 | Low-frequency low-noise piezoelectric vector sensor |
| CN110940968B (en) * | 2019-12-16 | 2022-12-13 | 海卓科(浙江自贸区)科技有限公司 | Low-frequency low-noise piezoelectric vector sensor |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120926 Effective date of abandoning: 20130626 |
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| RGAV | Abandon patent right to avoid regrant |