CN202092696U - Time difference method ultrasonic flow sensor with acoustic lens - Google Patents

Time difference method ultrasonic flow sensor with acoustic lens Download PDF

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Publication number
CN202092696U
CN202092696U CN2011202090485U CN201120209048U CN202092696U CN 202092696 U CN202092696 U CN 202092696U CN 2011202090485 U CN2011202090485 U CN 2011202090485U CN 201120209048 U CN201120209048 U CN 201120209048U CN 202092696 U CN202092696 U CN 202092696U
Authority
CN
China
Prior art keywords
time difference
acoustic
difference method
acoustic lens
flow sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2011202090485U
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Chinese (zh)
Inventor
董大明
陈华
李丽荣
李颖
李永治
李林风
高峻峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inner Mongolia University of Science and Technology
Original Assignee
Inner Mongolia University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inner Mongolia University of Science and Technology filed Critical Inner Mongolia University of Science and Technology
Priority to CN2011202090485U priority Critical patent/CN202092696U/en
Application granted granted Critical
Publication of CN202092696U publication Critical patent/CN202092696U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a time difference method ultrasonic flow sensor with an acoustic lens, belonging to the field of an industrial sensor. The time difference method ultrasonic flow sensor with the acoustic lens comprises a transducer, wherein the acoustic lens is arranged at the front end of the transducer, the acoustic lens is connected with a piezoelectric crystal, and the front end of the acoustic lens is concave. In the utility model, acoustic wave emitted by the acoustic source is changed into the convergent bunchiness through the convergence function of the lens, thereby effectively improving the acoustic pressure of a receiving end to finish the signal conversion; even if a complex flow field and multiphase fluid are confronted, the excitation signal, binaryzation and other parameters in a collector are appropriately adjusted to ensure that a slave computer can smoothly finish the acquisition and the transmission of the data; and the time difference method ultrasonic flow sensor adopts a novel structure and is suitable for the water flow and heat load detection in an industrial cooling water circulation system and a heat pipe network system.

Description

Sound lens time difference method ultrasonic flow sensor
Technical field
The utility model relates to a kind of sound lens time difference method ultrasonic flow sensor, belongs to the category of industrial sensor.
Background technology
At small-bore flow detection; tradition π type ultrasonic flow transducer; the transducer front end of this sensor is a planar structure; the sound wave that sends is a plane wave, and along with the increase of sound path, this plane wave expands restraints into divergent shape; when flow velocity higher; when being full of bubble, suspended particle in the liquid or turbulent flow being arranged, almost do not receive sound pressure signal, measurement can't be carried out.
Summary of the invention
It is a kind of higher when flow velocity that the purpose of this utility model is to provide, and when being full of bubble, suspended particle in the liquid or turbulent flow being arranged, almost do not receive sound pressure signal, the sound lens time difference method ultrasonic flow sensor that can normally measure.
Technical solution:
The utility model sound lens time difference method ultrasonic flow sensor comprises: transducer, and the transducer front end is provided with sound lens, and sound lens is connected with piezoelectric crystal, and the sound lens front end is a spill.
The convergent point of described sound lens is positioned at outside two transducers.
The utility model is because the transducer front end is provided with sound lens, and the sound wave that sound source is sent becomes the convergent pencil through the effect of converging of lens, effectively raises the acoustic pressure of receiving end, finishes the conversion of signal; Even flow field and heterogeneous fluid in the face of complicated in conjunction with pumping signal, the isoparametric adjusting of binaryzation in the collector, make slave computer can finish the collection and the transmission work of data smoothly.
The utility model is based on medium and small caliber and a kind of flow sensor that is suitable for the new structure that industrial cooling water recirculation system, heat distribution pipe network system water flow and thermal load detect of developing.
The beneficial effects of the utility model are,
1. only need to set up sound lens at the ultrasonic transducer front end, the equipment less investment, simple in structure, cheap.
2. do not have restricting element in the sound path of pipeline, the pressure loss is little, helps energy-conservation.
3. because the effect of converging of lens; effectively strengthened the acoustic pressure of receiving end; avoided common transducer because the increase of sound path; acoustic beam with certain subtended angle spread with liquid in the bubble, suspended particle or the turbulent flow that the exist acoustic attenuation and the loss that cause, even also be convenient to the collection of signal than muddiness or multi-phase fluid.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model functional diagram.
Embodiment
The utility model sensor outer housing 1 is closed single-casting, or looks field condition and assembled by pipeline section, threeway, joint; Shell 1 is provided with water inlet 2 and water delivering orifice 3, transducer 4 is symmetricly set in the shell two ends, the parameter request unanimity of two transducers 4, have additional sound lens 5 at transducer 4 front ends, sound lens 5 employing epoxide resin materials and piezoelectric crystal 6 are bonding, sound lens 5 front ends are concave surface, and the convergent point 7 of acoustic beam is exceeded about the twice of two transducers, 4 distances.The installation of transducer 4 is adopted built-in, has avoided external to install owing to will use couplant and jig, is unfavorable for the drawback of long-term online detection.
In the embodiment shown in Figure 2, the utility model sends respectively transducer 4 by slave computer and transmits and receives signal, because the front end of the piezoelectric crystal 6 in transducer 4 has assembled the sound lens 5 of suitable curvature, the sound pressure signal that makes two transducers, 4 front ends receive is significantly strengthened, again parameters such as the gain of fit adjustment slave computer, binaryzation, through analog to digital conversion, record the mistiming of concurrent-countercurrent,, calculate flow velocity according to flow velocity and time relation, multiply by caliber, obtain the flow of liquid.

Claims (2)

1. sound lens time difference method ultrasonic flow sensor comprises: transducer, it is characterized in that the transducer front end is provided with sound lens, and sound lens is connected with piezoelectric crystal, and the sound lens front end is a spill.
2. sound lens time difference method ultrasonic flow sensor according to claim 1 is characterized in that the convergent point of described sound lens is positioned at outside two transducers.
CN2011202090485U 2011-06-10 2011-06-10 Time difference method ultrasonic flow sensor with acoustic lens Expired - Fee Related CN202092696U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011202090485U CN202092696U (en) 2011-06-10 2011-06-10 Time difference method ultrasonic flow sensor with acoustic lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011202090485U CN202092696U (en) 2011-06-10 2011-06-10 Time difference method ultrasonic flow sensor with acoustic lens

Publications (1)

Publication Number Publication Date
CN202092696U true CN202092696U (en) 2011-12-28

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ID=45367757

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011202090485U Expired - Fee Related CN202092696U (en) 2011-06-10 2011-06-10 Time difference method ultrasonic flow sensor with acoustic lens

Country Status (1)

Country Link
CN (1) CN202092696U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3770561A1 (en) * 2019-07-26 2021-01-27 Levitronix GmbH Ultrasonic measuring device for measuring a flowing fluid and ultrasonic measuring system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3770561A1 (en) * 2019-07-26 2021-01-27 Levitronix GmbH Ultrasonic measuring device for measuring a flowing fluid and ultrasonic measuring system

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20111228

Termination date: 20140610