CN205785374U - A kind of ultrasonic flow sensor - Google Patents
A kind of ultrasonic flow sensor Download PDFInfo
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- CN205785374U CN205785374U CN201620572343.XU CN201620572343U CN205785374U CN 205785374 U CN205785374 U CN 205785374U CN 201620572343 U CN201620572343 U CN 201620572343U CN 205785374 U CN205785374 U CN 205785374U
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- mozzle
- flow sensor
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Abstract
The utility model discloses a kind of ultrasonic flow sensor, including mozzle, the tube wall of mozzle is provided with the receiving chamber of outwardly convex, in this receiving chamber, it is provided with microprocessor and the first ultrasonic transmitter being electrically connected with it, the second ultrasonic transmitter, the first ultrasonic receiver and the second ultrasonic receiver, the inner tubal wall relative with accommodating chamber is provided with the first reflector plate and the second reflector plate.This ultrasonic flow sensor obtains water velocity along the propagation time of following current and adverse current by measuring ultrasound wave in water, avoid and directly utilize the temperature impact that ultrasound wave speed calculation water velocity in current is introduced, improve the certainty of measurement of current and measure efficiency.
Description
Technical field
This utility model belongs to technology of instrument and meter field, particularly relates to a kind of ultrasonic flow sensor.
Background technology
Current most water meter is all to transform on traditional stem-winder, compared with traditional water meter, and ultrasound wave
Water meter can realize the highest measuring accuracy, and the element not moved because of it, therefore with little need for maintenance.And,
It also will not stop or slow down the flowing of air in pipeline or liquid.It can accurately measure the wideband of water meter product,
Without needing checking as mechanical type technology.High sensitivity makes it any leakage in pipeline can be detected, it is possible to
Measure and supplement the variable of the various accuracy of measurement that can affect in monitoring transport field.Ultrasonic water meter fast-developing one-tenth
Leading for field of flow measurement, and ultrasonic water meter has pinpoint accuracy and the low total cost of ownership.The most technically
The most economically seeing, ultrasonic water meter is all the ideal chose of water meter industry.
Propagation speed differential method (direct time difference method, time difference method, phase can be divided into according to the principle ultrasonic flowmeter of signal detection
Potential difference method and frequency-difference method), beam deviation method, Doppler method, cross-correlation method, space filter method and Noise Method etc..
Ultrasonic flowmeter is the same with ultrasonic flowmeter, because instrument circulation passage is not provided with any barrier member, all belongs to without hindrance
Hinder effusion meter, be adapted for solving a class effusion meter of flow measurements difficult problem, have relatively in terms of heavy caliber flow measurement especially
Prominent advantage, it is one of class effusion meter of quickly growing.
But the impact that water temperature is on ultrasound wave spread speed in water, thus have influence on the measurement essence of ultrasonic water meter
Degree.Therefore, in prior art when utilizing ultrasonic water meter to carry out discharge detection, in order to expand the allowed band of water temperature, must
The temperature-compensating must being correlated with measurement result, this is because the change of water temperature can cause ultrasound wave spread speed in water
Change, thus cause the error of water flow velocity angle value measured, and carry out temperature-compensating and will necessarily increase ultrasonic flow sensing
The operation complexity of device, reduces detection efficiency and the meter reading efficiency of current.
It addition, ultrasonic water meter of the prior art does not has warning function, when conduit pipeline damage causes and leaks in a large number,
Ultrasound wave the most in atmosphere or transmits in the more pipeline of air, but the aerial spread speed of ultrasound wave is about
340m/s, the spread speed in water is about 1500m/s, if now ultrasonic water meter is according to ultrasound wave spread speed in water
Calculate water velocity, not only measure inaccurate, also can be because of not causing a large amount of tap water to outflow water pipe on-call maintenance.
Utility model content
Utility model purpose: in order to overcome the deficiencies in the prior art, this utility model provides a kind of supersonic flow
Quantity sensor, it is possible to increase the certainty of measurement of current and efficiency, this utility model additionally provides a kind of flow rate testing methods, it is possible to
Reduce the wasting of resources caused because water pipe fails on-call maintenance.
Technical scheme: for achieving the above object, in this utility model, ultrasonic flow sensor includes mozzle, at water conservancy diversion
It is provided with the receiving chamber of outwardly convex on the tube wall of pipe, this receiving chamber is provided with microprocessor and is electrically connected respectively with it
The first ultrasonic transmitter, the second ultrasonic transmitter, the first ultrasonic receiver and the second ultrasonic receiver connect；Described first ultrasonic
Emitter and the second ultrasonic receiver are positioned at the side of microprocessor, and both are perpendicular to tube wall by place straight line；Described first ultrasonic
Receptor and the second ultrasonic transmitter are positioned at the opposite side of microprocessor, and both are perpendicular to tube wall by place straight line；First ultrasonic
Emitter and the first ultrasonic receiver place straight line parallel are in the tube wall of mozzle, the second ultrasonic transmitter and the second ultrasonic receiver
Place straight line parallel is in the tube wall of mozzle；The inner tubal wall relative with accommodating chamber is provided with the first reflector plate and the second reflection
Sheet, lays respectively at the both sides accommodating chamber, and described first reflector plate and the second reflector plate cooperating, for by the first ultrasound emission
The ultrasonic signal that device is launched reflexes to the first ultrasonic receiver, is reflexed to by the ultrasonic signal that the second ultrasonic transmitter is launched
Second ultrasonic receiver.
Wherein, described microprocessor includes timing module, is used for obtaining ultrasonic signal from the first ultrasonic transmitter to
The transmission time T1 of one ultrasonic receiver and ultrasonic signal from the second ultrasonic transmitter to the transmission of the second ultrasonic receiver time
Between T2.
Further, described microprocessor also includes alarm module, inside the transmission time T1 that will get and its
The threshold value pre-set compares, if transmission time T1 is more than this threshold value, then sends alarm signal.
Beneficial effect: the ultrasonic flow sensor in this utility model is by measuring ultrasound wave in water along following current and inverse
The propagation time of stream obtains water velocity, it is to avoid directly utilizing ultrasound wave speed calculation water velocity in current is drawn
The temperature impact entered, improves the certainty of measurement of current, simultaneously as the simple in construction of ultrasonic flow sensor, water flow velocity
The calculating of degree is simple, easy to operate, it is possible to increase measure efficiency；Further, the sensing of the ultrasonic flow in this utility model
Device is by arranging whether alarm module is first in normal operating conditions, if then obtaining according to the threshold decision water pipe pre-set
Water velocity, is not to directly transmit alarm signal so that water pipe can obtain on-call maintenance, reduces the waste of water resource.
Accompanying drawing explanation
Fig. 1 is the structural representation of ultrasonic flow sensor in this utility model.
Detailed description of the invention
Below in conjunction with embodiment, this utility model is further described.
Embodiment 1:
Ultrasonic flow sensor in Fig. 1 includes, by mozzle 1, being provided with the appearance of projection on the outer wall of mozzle 1
Receive chamber, this receiving chamber is provided with microprocessor 8 and the first ultrasonic transmitter 4, second of being electrically connected with it is ultrasonic
Emitter the 5, first ultrasonic receiver 6 and the second ultrasonic receiver 7, microprocessor 8 can transmit signal to far-end server, super
In use, water pipe is connected at the two ends of its mozzle 1 to acoustic wave flow sensor, and water flows along the tube wall of mozzle 1, and first is ultrasonic
Emitter 4 and the second ultrasonic receiver 7 are positioned at the side of microprocessor 8, and both are perpendicular to tube wall by place straight line；First ultrasonic connects
Receipts device 6 and the second ultrasonic transmitter 5 are positioned at the opposite side of microprocessor 8, and both are perpendicular to tube wall by place straight line；First ultrasonic
Emitter 4 and the first ultrasonic receiver 6 place straight line parallel are in the tube wall of mozzle 1, and the second ultrasonic transmitter 5 and second is ultrasonic
Receptor 7 place straight line parallel is in the tube wall of mozzle 1；The inner tubal wall relative with accommodating chamber is provided with the first reflector plate 2
With the second reflector plate 3, lay respectively at the both sides accommodating chamber, corresponding with the position of above-mentioned ultrasonic transmitter and ultrasonic receiver, energy
Enough the ultrasonic signal that the first ultrasonic transmitter 4 is launched is reflexed to the first ultrasonic receiver 6, by the second ultrasonic transmitter 5
The ultrasonic signal penetrated reflexes to the second ultrasonic receiver 7.
In order to prevent having impurity particle to destroy in water, or the normal of ultrasonic sensor and reflector plate can be affected
Work, the place at the flow inlet of mozzle 1 adds a filter screen, a certain amount of granule is blocked, in order to supersonic flow
The normal work of quantity sensor.
Above-mentioned microprocessor 8 includes timing module, and transmitting and the reception of ultrasonic flow sensor control and the propagation time
Process, be all to be completed by the timing module of microprocessor 8: microprocessor 8 starts the first ultrasonic transmitter 4, and to send first ultrasonic
Ripple signal also starts timing, and this ultrasonic signal, after the first reflector plate 2 reflection, is walked in the water in mozzle 1, arrived the
After two reflector plates 3, then arriving the first ultrasonic receiver 6 after secondary reflection, the first ultrasonic receiver 6 passes the signal to micro-place again
In reason device 8, microprocessor 8 terminates timing, obtains the transmission time T1 of the first ultrasonic signal；Microprocessor 8 starts and the second surpasses
Acoustic transmitter 5 sends the second ultrasonic signal and starts timing, and this ultrasonic signal is after the second reflector plate 3 reflection, at water conservancy diversion
Walking in water in pipe 1, after arriving the first reflector plate 2, then arrive the second ultrasonic receiver 7 after secondary reflection, second ultrasonic connects
Receiving device 7 and pass the signal in microprocessor 8 again, microprocessor 8 terminates timing, obtains the transmission time of the second ultrasonic signal
T2。
If water (flow) direction be in Fig. 1 from left to right, then the expression formula of the transmission time T1 of the first ultrasonic signal is: T1
=S ÷ (V1+V2)；The expression formula of the transmission time T2 of the second ultrasonic signal is: T2=S ÷ (V1-V2), vice versa, time
In, S is the distance in mozzle 1 between first ultrasonic transmitter 4 and the first ultrasonic receiver 6, V1For ultrasound wave in water
Transmission speed；V2For the speed of current in mozzle 1.
Finally deriving water velocity is: V2=(S ÷ T1-S ÷ T2)/2, and wherein, T1 and T2 is measured to be had learned that,
Propagation time T1 and T2 measured is processed by timing microprocessor read-write, then does relevant data process, so that it may obtain stably may be used
The difference of the propagation time difference leaned on, i.e. 1/T1 and 1/T2, just can calculate flow finally according to equation.It can be seen that it is final
Formula and ultrasound wave speed V in water1Unrelated, therefore utilize ultrasound wave to do difference along the propagation time of following current and adverse current in water
Temperature impact can be eliminated.
Embodiment 2:
Ultrasonic flow sensor in the present embodiment is identical with the structure in embodiment 1, unique unlike, this enforcement
Microprocessor 8 in example further comprises alarm module, for judging whether water pipe is deposited before carrying out water velocity calculating
In fault, its internal processes arranges a threshold value, if the transmission time T1 of the first ultrasonic signal is more than this threshold value, then to far-end
Server sends alarm signal；Otherwise calculate water velocity V2 according to the method in embodiment 1.
Stream is generally less than 10m/s through the flow velocity V2 of ultrasonic water meter, and aerial spread speed is about 340m/s,
Spread speed V1 in water is about 1500m/s, the most above-mentioned in V1 much larger than V2, even if aerial spread speed is also
Much larger than V2, then the transmission time T1 of the first ultrasonic signal can be approximated to be: T1=S ÷ V1, it is clear that when ultrasound wave just exists
Transmit in air or in the more pipeline of air, then during the transmission of the first ultrasonic signal obtained by microprocessor 8
Between T1 be mutually far short of what is expected with the time at water transmission.Therefore, the threshold value in the present embodiment can obtain according to test of many times
Ultrasound wave propagation time in current and rationally arrange.
Preferred implementation of the present utility model described in detail above, but, this utility model is not limited to above-mentioned reality
Execute the detail in mode, in technology concept of the present utility model, the technical solution of the utility model can be entered
The multiple equivalents of row, these equivalents belong to protection domain of the present utility model.
Claims (5)
1. a ultrasonic flow sensor, it is characterised in that this sensor includes mozzle (1), at the tube wall of mozzle (1)
On be provided with the receiving chamber of outwardly convex, this receiving chamber is provided with microprocessor (8) and be electrically connected with it
One ultrasonic transmitter (4), the second ultrasonic transmitter (5), the first ultrasonic receiver (6) and the second ultrasonic receiver (7)；Described
One ultrasonic transmitter (4) and the second ultrasonic receiver (7) are positioned at the side of microprocessor (8), and both place straight lines are perpendicular to pipe
Wall；Described second ultrasonic transmitter (5) and the first ultrasonic receiver (6) are positioned at the opposite side of microprocessor (8), and both places are straight
Line is perpendicular to tube wall；First ultrasonic transmitter (4) and the first ultrasonic receiver (6) place straight line parallel are in the pipe of mozzle (1)
Wall, the second ultrasonic transmitter (5) and the second ultrasonic receiver (7) place straight line parallel are in the tube wall of mozzle (1)；With receiving
It is provided with the first reflector plate (2) and the second reflector plate (3) on the inner tubal wall that chamber is relative, lays respectively at the both sides accommodating chamber, described
First reflector plate (2) and the second reflector plate (3) cooperating, for the ultrasonic signal launched by the first ultrasonic transmitter (4)
Reflex to the first ultrasonic receiver (6), the ultrasonic signal that the second ultrasonic transmitter (5) is launched is reflexed to the second ultrasonic reception
Device (7).
Ultrasonic flow sensor the most according to claim 1, it is characterised in that described microprocessor (8) includes timing
Module, is used for obtaining ultrasonic signal and from the transmission time T1 of the first ultrasonic transmitter (4) to the first ultrasonic receiver (6) and surpasses
Acoustic signals is from the transmission time T2 of the second ultrasonic transmitter (5) to the second ultrasonic receiver (7).
Ultrasonic flow sensor the most according to claim 2, it is characterised in that described microprocessor (8) also includes report
Alert module, the threshold value pre-set inside by the transmission time T1 got with it compares, if transmission time T1 is big
In this threshold value, then send alarm signal.
Ultrasonic flow sensor the most according to claim 2, it is characterised in that the computing formula of water velocity V2 is:
V2=(S ÷ T1-S ÷ T2)/2, in formula, S is the distance between the first ultrasonic transmitter and the first ultrasonic receiver.
Ultrasonic flow sensor the most as claimed in any of claims 1 to 4, it is characterised in that described mozzle
(1) it is provided with filter screen at flow inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620572343.XU CN205785374U (en) | 2016-06-13 | 2016-06-13 | A kind of ultrasonic flow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620572343.XU CN205785374U (en) | 2016-06-13 | 2016-06-13 | A kind of ultrasonic flow sensor |
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| Publication Number | Publication Date |
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| CN205785374U true CN205785374U (en) | 2016-12-07 |
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| CN201620572343.XU Active CN205785374U (en) | 2016-06-13 | 2016-06-13 | A kind of ultrasonic flow sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572014A (en) * | 2017-12-31 | 2018-09-25 | 深圳市前海海洋仪表科技有限公司 | Ultrasonic water meter and the method for obtaining water flow temperature by ultrasonic water meter |
| CN109489750A (en) * | 2019-01-02 | 2019-03-19 | 西安金指针电子技术有限公司 | A kind of photoelectric water meter |
| CN109613936A (en) * | 2019-01-24 | 2019-04-12 | 深圳供电局有限公司 | Substation's contour extraction |
-
2016
- 2016-06-13 CN CN201620572343.XU patent/CN205785374U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572014A (en) * | 2017-12-31 | 2018-09-25 | 深圳市前海海洋仪表科技有限公司 | Ultrasonic water meter and the method for obtaining water flow temperature by ultrasonic water meter |
| CN109489750A (en) * | 2019-01-02 | 2019-03-19 | 西安金指针电子技术有限公司 | A kind of photoelectric water meter |
| CN109613936A (en) * | 2019-01-24 | 2019-04-12 | 深圳供电局有限公司 | Substation's contour extraction |
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