CN206281534U - A kind of oblique angle reflectance ultrasound low - Google Patents
A kind of oblique angle reflectance ultrasound low Download PDFInfo
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- CN206281534U CN206281534U CN201621364196.3U CN201621364196U CN206281534U CN 206281534 U CN206281534 U CN 206281534U CN 201621364196 U CN201621364196 U CN 201621364196U CN 206281534 U CN206281534 U CN 206281534U
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Abstract
The utility model discloses a kind of oblique angle reflectance ultrasound low, including the first transducer and second transducer that measurement pipe is connected with measurement pipe, described measurement pipe is straight tube；Described first transducer axis and second transducer axis are located at approximately the same plane；Described measurement pipe axis passes through plane where described first transducer axis and second transducer axis and is 30 °~75 ° with the angle of the plane.By having certain angle where first transducer axis and second transducer axis between plane and measurement pipe axis, two transducers is being had angle respectively along the horizontal and vertical of measurement pipe, constitute oblique angle reflectance ultrasound low.Using oblique angle reflectance ultrasound low, in the case of equal number sound channel ultrasonic wave, oblique angle reflection increases acoustic measurement position and measurement sound path, and the adaptability and certainty of measurement to different working condition measurings is greatly improved.
Description
Technical field
The utility model is related to a kind of ultrasonic flowmeter, more particularly to a kind of oblique angle reflectance ultrasound low.
Background technology
Ultrasonic wave just carries the information of upper rate of flow of fluid, therefore the ultrasonic wave by receiving when being propagated in the fluid of flowing
The flow velocity of fluid can be just detected, so as to be converted into flow.Ultrasonic pulse reaches another through pipeline from a sensor
Sensor, just as a boatman for ferryboat is crossing Yi Tiaohe.When gas does not flow, ping with same speed (velocity of sound,
C) propagate in the two directions.If the gas in pipeline has certain flow rate V (flow velocity is not equal to zero), along flow direction
Ping can transmit quicker, and the ping in reverse flow direction can be transmitted more slowly.So, following current transmission time tDMeeting
It is shorter, and countercurrent time tUPresident is a little.It is all transmission time when not flowed with gas that length mentioned here is a little or shorter
Comparatively speaking；According to the mode of detection, propagation speed differential method, Doppler method, beam deviation method, Noise Method and correlation method can be divided into
Etc. different types of ultrasonic flowmeter.Ultrasonic flowmeter is just to be opened as integrated circuit technique is developed rapidly in recent ten years
Begin the one kind applied.
According to the principle to signal detection, current ultrasonic flowmeter can substantially divide propagation speed differential method (including：When directly
Difference method, time difference method, phase difference method, frequency-difference method) class such as beam deviation method, Doppler method, correlation method, spatial filtering method and Noise Method
Type.It is wherein most simple with Noise Method principle and structure, it is easy to measure and carries, it is cheap but the degree of accuracy is relatively low, it is suitable in stream
Measurement accuracy requirement occasion not high is used.
Because the general principle of direct time difference method, time difference method, frequency-difference method and phase difference method is all by measuring ultrasonic wave arteries and veins
Rush following current and adverse current passes the difference of speed of giving the correct time to reflect the flow velocity of fluid, therefore be referred to as propagation speed differential method again.Its middle frequency difference
Method and time difference method overcome the error that the velocity of sound is brought with fluid temperature variations, and the degree of accuracy is higher, so being widely adopted.According to changing
The collocation method of energy device is different, and spread speed is sent and is divided into again：Z methods (penetrant method), V methods (bounce technique), X methods (interior extrapolation method) etc..
Beam deviation method be using the ultrasonic beam direction of propagation in a fluid with rate of flow of fluid change and produce skew come
Reflection rate of flow of fluid, during low flow velocity, the very poorly rated property of sensitivity is little.
Doppler method is to utilize acoustic Doppler principle, many by the ultrasonic wave for measuring scattering volume scattering in boiling fluid
It is general to strangle frequency displacement to determine fluid flow, it is adaptable to containing measurements of fluid flow such as suspended particulate, bubbles.
Correlation method is to measure flow using correlation technique, in principle, the velocity of sound in the accuracy of measurement of this method and fluid without
Close, thus and fluid temperature (F.T.), concentration etc. is unrelated, thus accuracy of measurement is high, applied widely.But correlator price, circuit
It is more complicated.After microprocessor popularization and application, this shortcoming can overcome.
Noise that Noise Method (audition method) is produced when being and being flowed using the fluids within pipes principle relevant with the flow velocity of fluid,
Flow velocity or flow value are represented by detection noise.Its method is simple, and equipment price is cheap, but the degree of accuracy is low.
Above several method respectively has feature, should according to detected fluid property velocity flow profiles situation, pipeline infield and
The factors such as the requirement to accuracy of measurement are selected.Generally because the temperature of working medium in industrial production can not often keep permanent
It is fixed, therefore use frequency-difference method and time difference method more.Direct time difference method is just used only when caliber is very big.To transducer installation method
Selection principle is usually：When fluid is along pipe axle PARALLEL FLOW, from Z methods；Or pipeline peace not parallel with pipe uranium when flow direction
When dress place is restricted transducer installation interval, using V methods or X methods.When Flow Field Distribution is uneven and straight length before table
When shorter, can also be overcome using multichannel (such as two-channel or the quadraphonic) flow velocity disturbed belt come flow measurement error.It is many
Pu Lefa is suitable to measure two phase flow, can avoid blocking, abrasion that conventional instrument causes by suspension grain or bubble, adhere to and can not transport
Capable disadvantage, thus developed rapidly.With industrial expansion and the development of energy conservation, kerosene mixing (COM), coal cement
The conveying and application of (CWM) fuel and the development of the power-economizing method such as fuel oil adding water is combustion-supporting are closed, is all Doppler ultra sonic wave flow
Bright prospects are opened up in gauge application.
And the reception mode of commonly used ultrasonic wave at present, 1, direct-injection type：Directly receive transmitting ultrasonic/sonic wave 2, reflection
Formula：The sound wave of received tube wall reflection.Using both reception mode ultrasonic waves by cutting under the channel case of equal number
Face is small, it is impossible to which fluidized―bed furnace is accurately measured.
Utility model content
In view of the shortcomings of the prior art, the invention provides a kind of oblique angle reflectance ultrasound low, change conventional
Direct-injection type receives ultrasonic/sonic wave and the reflective acoustic receiver mode by the same axis of pipe, effectively solves fluidized―bed furnace
Change the influence to certainty of measurement.
The technical solution of the utility model is as follows：
A kind of oblique angle reflectance ultrasound low, including the first transducer and second that measurement pipe is connected with measurement pipe is changed
Energy device, described measurement pipe is straight tube；Described first transducer axis and second transducer axis are located at approximately the same plane；Institute
Plane where the measurement pipe axis stated through described first transducer axis and second transducer axis and with the folder of the plane
Angle is 30 °~75 °.
In the above-mentioned technical solutions, by plane where first transducer axis and second transducer axis and measurement pipe axle
There is certain angle between line, two transducers is being had angle respectively along the horizontal and vertical of measurement pipe, constitute oblique angle anti-
Penetrate ultrasonic flowmeter.Because flow velocity of each point in pipe diameter is different, if with a flow relocity calculation stream for point
Amount, error is often very big.Using oblique angle reflectance ultrasound low, in the case of equal number sound channel ultrasonic wave, oblique angle reflection
Increase acoustic measurement position and measurement sound path, the adaptability and certainty of measurement to different working condition measurings is greatly improved.
By changing transducer in ultrasonic flowmeter main body setting angle, on Measure section, by principle of reflection, increase
Plus measurement position and sound path, change conventional direct-injection type and receive ultrasonic/sonic wave and the reflective acoustic receiver by the same axis of pipe
Mode, effectively solves influence of the fluidized―bed furnace change to certainty of measurement.Multichannel flowmeter can significantly be dropped simultaneously
Low manufacturing cost.
A reflecting surface mounting hole is provided with described measurement pipe；Described reflecting surface mounting hole is located at first transducer axis
With the point of intersection of second transducer axis.
Plane of reflection abaculus is installed in described reflecting surface mounting hole.
Described measurement pipe two ends connect the first mounting flange and the second mounting flange respectively.
Angle between described first transducer axis and second transducer axis is 30 °~75 °.
Preferably, described plane of reflection abaculus is made up of stainless steel material.Plane is inlayed in reflection point position main body
Reflecting surface is tangent with caliber inwall.Ultrasonic ranging system is needed transmitting pulse and is formed instead by reflecting surface in the course of the work
Ripple is emitted back towards, by reflecting surface fluctuating quantity is bigger and scrambling is influenceed, is caused the transition time to rise and fall and is become big, under causing certainty of measurement
Drop.It is cylindrical curved surface in round tube inside diameter reflecting surface, it is big on certainty of measurement influence, so embedding in pip insertion stainless steel plane
Block, plane is changed to by cylindrical curved surface, to improve certainty of measurement.
Compared with prior art, the beneficial effects of the utility model are：
Due to fluid, velocity flow profile situation has differences in pipeline, ultrasonic flowmeter correction factor is flowed by fluid
Dynamic state influence causes measurement error, and oblique angle reflectance ultrasound low improves conventional soundtrack and is distributed in by central axis
And can not comprehensively reflect the distribution status of fluid in whole cross section, and proposing the reflection of acoustic poth arrangement bevel, contrast draws
The fluidized―bed furnace correction factor stability of oblique angle reflex channel arranges flowmeter higher than present conventional soundtrack, reduces fluidised form to measurement
The influence of precision, reaches the purpose of optimization measurement.
Brief description of the drawings
Fig. 1 is a kind of overall structure diagram of oblique angle reflectance ultrasound low of the utility model；
Fig. 2 is a kind of front view of oblique angle reflectance ultrasound low of the utility model；
Fig. 3 is a kind of upward view of oblique angle reflectance ultrasound low of the utility model；
Fig. 4 is a kind of left view of oblique angle reflectance ultrasound low of the utility model.
Wherein：1st, measurement pipe；2nd, first transducer；3rd, second transducer；4th, the first mounting flange；5th, the second Method for Installation
It is blue；6th, reflecting surface mounting hole.
Specific embodiment
A kind of oblique angle reflectance ultrasound low of the utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of oblique angle reflectance ultrasound low, including measurement pipe 1, the transducing of first transducer 2 and second
Device 3, measurement pipe 1 has straight measurement pipe axis；First transducer 2 has straight first transducer axis；Second transducer 3 has
There is straight second transducer axis；First transducer axis and second transducer axis belong to approximately the same plane；First transducer
Plane where axis and second transducer axis is 60 ° with the angle of measurement pipe axis.Meanwhile, first transducer axis and second
Angle between transducer axis is 60 °.A diameter of D of measurement pipe 1, ultrasound is passed between first transducer 2 and second transducer 3
Distance is broadcast for L.The two ends of measurement pipe 1 connect the first mounting flange 4 and the second mounting flange 5 respectively.
First transducer 2 and second transducer 3 have angle respectively horizontal and vertical, constitute oblique angle reflectance ultrasound wave current amount
Meter.In the case of equal number sound channel ultrasonic wave, oblique angle reflection increases acoustic measurement position and measurement sound path, eliminates velocity flow profile
Uneven influence, is greatly improved the adaptability and certainty of measurement to different working condition measurings.
As shown in Figure 2, Figure 3, Figure 4, it is provided with a reflecting surface mounting hole 6 in measurement pipe 1；Reflecting surface mounting hole 6 is located at first
The point of intersection of transducer axis and second transducer axis.It is provided with as the stainless steel of the plane of reflection in reflecting surface mounting hole 6
Plane abaculus.
During whole device normal work, first transducer launches the reflected plane reflection of sound wave to second transducer, adopts
Collection acoustic transit time, second transducer launches the reflected plane reflection of sound wave to first transducer, during collection sonic transmissions
Between, the time difference is calculated with this.
Preferable implementation example of the present utility model is the foregoing is only, the utility model is not limited to, it is all in this reality
Within new spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in guarantor of the present utility model
Within the scope of shield.
Claims (6)
1. first transducer and the second transducing that a kind of oblique angle reflectance ultrasound low, including measurement pipe is connected with measurement pipe
Device, it is characterised in that：
Described measurement pipe is straight tube；
Described first transducer axis and second transducer axis are located at approximately the same plane；
Described measurement pipe axis passes through plane where described first transducer axis and second transducer axis and is put down with this
The angle in face is 30 °~75 °.
2. reflectance ultrasound low in oblique angle as claimed in claim 1, it is characterised in that：It is anti-one to be provided with described measurement pipe
Penetrate face mounting hole；Described reflecting surface mounting hole is located at first transducer axis and the point of intersection of second transducer axis.
3. reflectance ultrasound low in oblique angle as claimed in claim 2, it is characterised in that：Peace in described reflecting surface mounting hole
Equipped with plane of reflection abaculus.
4. reflectance ultrasound low in oblique angle as claimed in claim 3, it is characterised in that：Described plane of reflection abaculus is not by
Rust Steel material is made.
5. reflectance ultrasound low in oblique angle as claimed in claim 1, it is characterised in that：Described measurement pipe two ends set respectively
There are the first mounting flange and the second mounting flange.
6. reflectance ultrasound low in oblique angle as claimed in claim 1, it is characterised in that：Described first transducer axis and
Angle between second transducer axis is 30 °~75 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621364196.3U CN206281534U (en) | 2016-12-13 | 2016-12-13 | A kind of oblique angle reflectance ultrasound low |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621364196.3U CN206281534U (en) | 2016-12-13 | 2016-12-13 | A kind of oblique angle reflectance ultrasound low |
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| Publication Number | Publication Date |
|---|---|
| CN206281534U true CN206281534U (en) | 2017-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621364196.3U Active CN206281534U (en) | 2016-12-13 | 2016-12-13 | A kind of oblique angle reflectance ultrasound low |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782387A (en) * | 2017-09-27 | 2018-03-09 | 广州方时仪器有限公司 | A kind of structure and installation method of the flow measuring sensor based on time-of-flight method |
| CN108562341A (en) * | 2018-06-21 | 2018-09-21 | 重庆前卫克罗姆表业有限责任公司 | A kind of reflective multichannel ultrasonic gas flowmeter runner |
| CN111272240A (en) * | 2020-03-31 | 2020-06-12 | 杭州思筑智能设备有限公司 | Built-in oblique reflection multichannel ultrasonic flow measurement module and flowmeter |
-
2016
- 2016-12-13 CN CN201621364196.3U patent/CN206281534U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782387A (en) * | 2017-09-27 | 2018-03-09 | 广州方时仪器有限公司 | A kind of structure and installation method of the flow measuring sensor based on time-of-flight method |
| CN107782387B (en) * | 2017-09-27 | 2020-01-14 | 广州方时仪器有限公司 | Structure and installation method of flow measurement sensor based on time-of-flight method |
| CN108562341A (en) * | 2018-06-21 | 2018-09-21 | 重庆前卫克罗姆表业有限责任公司 | A kind of reflective multichannel ultrasonic gas flowmeter runner |
| CN111272240A (en) * | 2020-03-31 | 2020-06-12 | 杭州思筑智能设备有限公司 | Built-in oblique reflection multichannel ultrasonic flow measurement module and flowmeter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 310052 No. 88, Jiangling Road, Binjiang District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou construction intelligent equipment Co., Ltd. Address before: 310052 Room 725, 7th floor, No. 475 Changhe Road, Changhe Street, Binjiang District, Hangzhou City, Zhejiang Province Patentee before: Hangzhou construction intelligent equipment Co., Ltd. |
|
| CP02 | Change in the address of a patent holder | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Oblique angle reflected ultrasonic waves flowmeter Effective date of registration: 20200304 Granted publication date: 20170627 Pledgee: Hangzhou United Rural Commercial Bank Co., Ltd. Xixing sub branch Pledgor: Hangzhou construction intelligent equipment Co., Ltd. Registration number: Y2020330000072 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |