CN105987750A - Co-vibration particle vibration velocity sensor of water medium - Google Patents
Co-vibration particle vibration velocity sensor of water medium Download PDFInfo
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- CN105987750A CN105987750A CN201510064354.7A CN201510064354A CN105987750A CN 105987750 A CN105987750 A CN 105987750A CN 201510064354 A CN201510064354 A CN 201510064354A CN 105987750 A CN105987750 A CN 105987750A
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Abstract
The invention relates to a co-vibration particle vibration velocity sensor of a water medium, and belongs to the field of underwater acoustic sensors. The sensor comprises a moving coil energy transducer, a rigid mass block, a composite material wrapping layer, a suspension support, a flexible suspension spring and a connecting cable. A vibration velocity unit formed by the moving coil energy transducer and the rigid mass block is used to obtain flat reception frequency response, and the vibration velocity of the water medium can be measured within a wider frequency band range; and the ratio of a composite material is adjusted so that the sensor can suspend freely in the water medium without buoyancy, the flexible suspension spring ensures that the sensor and the water medium in the surrounding vibrate in the same phase, and the vibration velocity of a particle of the water medium is detected accurately. The whole sensor is characterized by simple structure, high sensitivity and standard spatial direction, and is convenient to manufacture and use in practical.
Description
Technical field
This patent relates to a kind of aqueous medium particle plane vibration speed measurement sensor, is mainly used in the inspection of aqueous medium particle vibration velocity under acoustic wave action
Survey, belong to underwater sound sensor field.
Background technology
Under water in acoustic measurement, particle vibration velocity is typically derived by acoustic pressure or acoustic pressure gradient.And the most frequently used measuring method is
Use pressure gradient sensor or pressure hydrophone.
Acoustic pressure gradient is directly proportional to active force, and therefore, Newton's law the output that can obtain pressure gradient sensor is accelerated with particle
Degree is directly proportional.But, the frequency response of pressure gradient sensor is not smooth, output phase place and original speed phase place phase
Differ from 90 °, it is necessary to measurement result is modified.Other method measuring particle vibration velocity also includes bi_hydrophone method, and this technology is given
Be the finite difference of acoustic pressure gradient.Owing to this technology relies on the difference of signal produced by two hydrophone, therefore, measure and obtained
The signal noise obtained is bigger.And if the sensitivity of two measurement hydrophones is inconsistent, the accuracy of measurement result can directly be subject to
Impact；Meanwhile, the dynamic range of this measuring method is the most extremely limited.
For the actual demand of particle plane vibration speed measurement, need to develop special sensor, can directly particle vibration velocity be measured.Should
The output of hydrophone should be directly proportional to particle vibration velocity；In measuring frequency band, sensitivity is unrelated with frequency, secondly the size of sensor
Should be sufficiently small, to reduce the interference to sound field；Meanwhile, hydrophone should have good anti-electromagnetic interference capability.
Summary of the invention
It is an object of the invention to overcome shortcoming when pressure gradient sensor or bi_hydrophone method measurement particle vibration velocity, developing can be directly
Measure the sensor of particle vibration velocity, accurately to obtain aqueous medium particle vibration velocity.
The vibration velocity sensor of the present invention is structurally mainly coated with by moving-coil transducer, rigid block, composite, is flexibly connected
Spring, suspension holdfast and connection cable are constituted.In order to realize the accurate detection to aqueous medium particle vibration velocity, sensor uses zero to float
Power designs and uses and uses flexibility fixing between flexible suspension mode and suspension holdfast.As shown in Figure 1.The main body of vibration velocity sensor
By moving-coil transducer, rigid block and composite clad two parts, vibration velocity sensor profile is cylindrical；Suspension holdfast
It is prepared from by engineering plastic materials, to reduce the sound scattering impact on sensor receptivity.Sensor and carriage assembly it
Between use flexibility link.
Described moving-coil transducer, has higher acceleration sensitivity in its response band and responds the characteristics such as smooth.Composite wood
Material clad forms by solidifying after epoxy and glass microballoon mixed configuration, and density is about 0.5g/cm3.Hitch uses benzene second
Alkene material structure forms.
Accompanying drawing explanation
Fig. 1 one synchronous vibration type aqueous medium particle vibration velocity sensor construction schematic diagram
Wherein: (1) moving-coil transducer, (2) rigid block, (3) composite clad, (4) suspension holdfast, (5)
Flexible suspension spring, (6) connect cable.
Detailed description of the invention
The detailed description of the invention of the 1 explanation present invention below in conjunction with the accompanying drawings.
The inertia moving-coil transducer that the present invention uses, fundamental frequency 10Hz, Q-value is 0.7, a length of 2.54cm, a diameter of 2.22cm,
Volume 9.85cm3, gross mass 43.6g.The present invention uses chronic cured epoxy and glass microballoon to make mixing inserts, epoxy
It is 1: 4 with the volume ratio of glass microballoon；The present invention use styrene materials construct suspension holdfast, styrene bar length 35cm, wide
Degree 6cm, thickness 0.5cm, use the flexible chained sensors of stainless steel spring and suspension holdfast.
Moving-coil transducer upper limit operation frequency is 12.5kHz, by using compound coating material, the average density of sensor and water
Identical, can static be suspended in water, the impedance of vibration velocity sensor and the impedanoe ratio of suspension holdfast are more than 10；Vibration velocity sensor leads to
Crossing suspension holdfast fixing to realize in water, vibration velocity sensor has the one-dimensional in vertical direction, can directly obtain vertical
True particle vibration velocity on direction；Suspension holdfast is the most solid and reliable after installing can also completely cut off external member vibration to velocity hydrophone
Impact；Suspension holdfast has the lightest quality, and its projected area is less than the 0.25 of velocity hydrophone cross-sectional area, suspension holdfast
Drag less than velocity hydrophone inertia force 2%, it is to avoid the drag impact on velocity hydrophone.
Claims (4)
1. an aqueous medium particle plane vibration speed measurement sensor, specifically includes that moving-coil transducer (1), rigid block (2), composite wood
Material clad (3), suspension holdfast (4), flexible suspension spring (5) and connection cable (6).
2. plane vibration speed measurement device as claimed in claim 1, it is characterised in that: velocity hydrophone is by moving-coil transducer, rigid block
Identical with aqueous medium with the average density of the part of composite clad composition, can static be suspended in water.
3. plane vibration speed measurement device as claimed in claim 1, it is characterised in that: velocity hydrophone realizes water by flexible suspension spring
In fixing, sensor can directly obtain the true particle vibration velocity in vertical direction.
4. plane vibration speed measurement device as claimed in claim 1, it is characterised in that: suspension holdfast has the lightest quality, suspension holdfast
Drag less than velocity hydrophone inertia force 2 ‰, it is to avoid the drag impact on velocity hydrophone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510064354.7A CN105987750A (en) | 2015-02-09 | 2015-02-09 | Co-vibration particle vibration velocity sensor of water medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510064354.7A CN105987750A (en) | 2015-02-09 | 2015-02-09 | Co-vibration particle vibration velocity sensor of water medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105987750A true CN105987750A (en) | 2016-10-05 |
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ID=57036218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510064354.7A Pending CN105987750A (en) | 2015-02-09 | 2015-02-09 | Co-vibration particle vibration velocity sensor of water medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105987750A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202853734U (en) * | 2012-06-14 | 2013-04-03 | 常熟海量声学设备科技有限公司 | Flexible hanger bracket for vibration velocity transducer measurement |
| CN103048037A (en) * | 2012-06-14 | 2013-04-17 | 常熟海量声学设备科技有限公司 | Particle vibration velocity measuring sensor for one-dimensional aqueous medium |
-
2015
- 2015-02-09 CN CN201510064354.7A patent/CN105987750A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202853734U (en) * | 2012-06-14 | 2013-04-03 | 常熟海量声学设备科技有限公司 | Flexible hanger bracket for vibration velocity transducer measurement |
| CN103048037A (en) * | 2012-06-14 | 2013-04-17 | 常熟海量声学设备科技有限公司 | Particle vibration velocity measuring sensor for one-dimensional aqueous medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| DD01 | Delivery of document by public notice |
Addressee: Ocean Applied Acoustic-Tech Co., Ltd. Document name: Notification that Application Deemed to be Withdrawn |
|
| DD01 | Delivery of document by public notice | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161005 |
|
| WD01 | Invention patent application deemed withdrawn after publication |