CN109405905A - Multichannel ultrasonoscope measuring device and its metering method - Google Patents
Multichannel ultrasonoscope measuring device and its metering method Download PDFInfo
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- CN109405905A CN109405905A CN201811524794.6A CN201811524794A CN109405905A CN 109405905 A CN109405905 A CN 109405905A CN 201811524794 A CN201811524794 A CN 201811524794A CN 109405905 A CN109405905 A CN 109405905A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
Abstract
The invention discloses a kind of multichannel ultrasonoscope measuring devices, for measuring the flow velocity or flow of fluid in pipeline section, including ultrasonic transducer, microprocessor, switching switch and ultrasonic transmitter-receiver；Multiple sound channels are equipped in pipeline section；Corresponding each sound channel is all provided with that there are two ultrasonic transducers；Switching switch is connect with microprocessor and ultrasonic transmitter-receiver, is used to receive the sound channel switching signal of microprocessor transmission, and is switched ultrasonic transmitter-receiver according to sound channel switching signal and connected from the ultrasonic transducer of different sound channels；The time interval for sending ultrasonic signal and received ultrasonic signal is sent to microprocessor by ultrasonic transmitter-receiver；Microprocessor is according to the flow velocity or flow of fluid in time interval run of designing.Multichannel ultrasonoscope measuring device of the invention reduces measurement error, improves measuring accuracy, it is ensured that meter being capable of continuous for a long time, stable operation.
Description
Technical field
The present invention relates to fluid metering technical fields, and in particular to a kind of multichannel ultrasonoscope measuring device further relates to one kind
Multichannel supersonic wave metering method.
Background technique
Ultrasonic flowmeter is a kind of contactless flow gauge, is had no effect in measurement process to fluid state,
With the characteristics of small in size, range ratio be big and high stability.In the prior art, most ultrasonic flowmeters can only
Realize the tachometric survey of monophonic, it is not entire that flow velocity measured by ultrasonic probe, which is the line mean flow rate of streamwise,
Mean flow rate in pipeline section cross section, heavy caliber table, measurement error is big in the wide diameter pipeline section in open channel, river；On the other hand, monophone
Road measurement cannot be measured in the case where ultrasonic probe breaks down, and influence the normal work of ultrasonoscope measuring device.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of multichannel ultrasonoscope measuring devices, reduce measurement error, improve
Measuring accuracy, it is ensured that meter being capable of continuous for a long time, stable operation.
In order to solve the above-mentioned technical problems, the present invention provides a kind of multichannel ultrasonoscope measuring devices, for measuring pipeline section
The flow velocity or flow of interior fluid, including ultrasonic transducer further include that microprocessor, switching switch and ultrasonic wave transmission connect
Receive device；
Multiple sound channels are equipped in the pipeline section, multiple sound channels are set gradually in the cross-sectional direction of pipeline section；It is corresponding every
A sound channel is all provided with there are two the ultrasonic transducer, two ultrasonic transducers along the flow direction of fluid successively
Setting, respectively upstream ultrasonic wave transducer and downstream ultrasonic wave transducer；
The switching switch is connect with microprocessor and ultrasonic transmitter-receiver, is used to receive the microprocessor hair
The sound channel switching signal sent, and switch according to the sound channel switching signal ultrasound of ultrasonic transmitter-receiver from different sound channels
Wave transducer connection；
The ultrasonic transmitter-receiver is for generating and sending ultrasonic signal to ultrasonic transducer, reception ultrasonic wave
The ultrasonic signal that energy converter is sent, and the time interval for sending ultrasonic signal and received ultrasonic signal is sent to micro- place
Manage device；
The microprocessor is connect with switching switch and ultrasonic transmitter-receiver, for generating and sending sound channel switching letter
Number to switching switch；For generating and sending metering signal to the ultrasonic transmitter-receiver, the ultrasonic wave is transmitted and received
Device sends or receives ultrasonic signal according to metering signal；Between the time for being also used to receive the ultrasonic transmitter-receiver transmission
Every, and according to the flow velocity or flow of fluid in the time interval run of designing.
In a preferred embodiment of the present invention, further comprise the ultrasonic transmitter-receiver have the first signal end and
Second signal end, the ultrasonic transmitter-receiver select in the first signal end and second signal end according to the metering signal
One is used as transmission ultrasonic signal end, another is used as received ultrasonic signal end.
It further comprise that there is the switching switch the first switching contact and second to cut in a preferred embodiment of the present invention
Change contact, one end of both first switching contact and second switching contact connects with the first signal end and second signal end respectively
It connects；The switching switch is distinguished according to the other end that the sound channel switching signal controls the first switching contact and the second switching contact
From in different sound channels upstream ultrasonic wave transducer and downstream ultrasonic wave transducer connect.
It further comprise that the switching switchs as analog switch in a preferred embodiment of the present invention.
It further comprise that the microprocessor is also used to export chip selection signal in a preferred embodiment of the present invention, it is described
Switching switch enters dormant state or working condition according to chip selection signal.
It further comprise the pipeline section between the sound channel two-by-two of its die position in a preferred embodiment of the present invention
Spacing be less than close to its pipe wall position sound channel two-by-two between spacing.
In order to solve the above-mentioned technical problem, the present invention also provides a kind of multichannel supersonic wave metering methods, for measuring
The flow velocity of fluid in pipeline section, uses the meter of the above structure comprising following steps,
(1) the first signal end of ultrasonic transmitter-receiver and second signal end are super with the upstream of one of sound channel respectively
Acoustic wave transducer is connected with downstream ultrasonic wave transducer；
(2) the first signal end of ultrasonic transmitter-receiver sends ultrasonic pulse, and second signal end receives ultrasonic wave letter
Number, the first signal end of measurement sends a signal to the time interval T1 of the second signal termination collection of letters number；
(3) the second signal end of ultrasonic transmitter-receiver sends ultrasonic pulse, and the first signal end receives ultrasonic wave letter
Number, measurement second signal end sends a signal to the time interval T2 that the first signal end receives signal end；
(4) microprocessor according to the following formula in a run of designing current channel fluid flow rate υi:
υi=(T2-T1) * C (formula one)
Wherein, T2 is the time interval that second signal end sends a signal to that the first signal end receives signal end；T1 is first
Signal end sends a signal to the time interval of the second signal termination collection of letters number；C is the speed that ultrasonic wave is propagated in fluid；
(5) the first signal end of ultrasonic transmitter-receiver and second signal the end upstream ultrasonic with next sound channel respectively
Wave transducer is connected with downstream ultrasonic wave transducer；It is repeated in step (2)~step (4), each sound channel in run of designing
Fluid flow rate υi, i is sound channel serial number；
(6) microprocessor according to the following formula in two run of designing fluid flow velocity V:
Wherein, n is the number of sound channel in pipeline section.
It further comprise microprocessor fluid in three run of designing according to the following formula in a preferred embodiment of the present invention
Flow velocity:
Wherein, AiFor the weight of i-th of sound channel flow velocity, the pipeline section is less than close to the sound channel flow velocity weight of its pipe wall position
Sound channel flow velocity weight close to its die position.
In order to solve the above-mentioned technical problem, the present invention also provides a kind of multichannel supersonic wave metering methods, for measuring
The flow of fluid in pipeline section, uses the meter of the above structure comprising following steps,
(1) the first signal end of ultrasonic transmitter-receiver and second signal end are super with the upstream of one of sound channel respectively
Acoustic wave transducer is connected with downstream ultrasonic wave transducer；
(2) the first signal end of ultrasonic transmitter-receiver sends ultrasonic pulse, and second signal end receives ultrasonic wave letter
Number, the first signal end of measurement sends a signal to the time interval T1 of the second signal termination collection of letters number；
(3) the second signal end of ultrasonic transmitter-receiver sends ultrasonic pulse, and the first signal end receives ultrasonic wave letter
Number, measurement second signal end sends a signal to the time interval T2 that the first signal end receives signal end；
(4) microprocessor according to the following formula in a run of designing current channel fluid flow rate υi:
υi=(T2-T1) * C (formula one)
Wherein, T2 is the time interval that second signal end sends a signal to that the first signal end receives signal end；T1 is first
Signal end sends a signal to the time interval of the second signal termination collection of letters number；C is the speed that ultrasonic wave is propagated in fluid；
(5) the first signal end of ultrasonic transmitter-receiver and second signal the end upstream ultrasonic with next sound channel respectively
Wave transducer is connected with downstream ultrasonic wave transducer；It is repeated in step (2)~step (4), each sound channel in run of designing
Fluid flow rate υi, i is sound channel serial number；
(6) microprocessor according to the following formula in two run of designing fluid flow velocity V:
Wherein, n is the number of sound channel in pipeline section；
(7) microprocessor according to the following formula in four run of designing fluid flow F:
Wherein S is the pipeline section cross-sectional area for having fluid section in pipeline section.
It further comprise microprocessor fluid in five run of designing according to the following formula in a preferred embodiment of the present invention
Flow:
Wherein, AiFor the weight of i-th of sound channel flow velocity, the pipeline section is less than close to the sound channel flow velocity weight of its pipe wall position
Sound channel flow velocity weight close to its die position.
Beneficial effects of the present invention:
One, multichannel ultrasonoscope measuring device of the invention, pipeline section is interior to have multiple sound channels, and corresponding each sound channel configures
Two ultrasonic transducers, for measuring the fluid flow rate on current channel, microprocessor is according to the fluid stream in each sound channel
Speed calculates the flow velocity for obtaining fluid in pipeline section, and measuring accuracy is high, error is small, while multichannel metering is compared to traditional monophonic
Metering all will not influence the normal work of entire meter in inoperable situation there is ultrasonic transducer to break down,
Ensure that meter being capable of continuous, stable operation for a long time with this.
Secondly, multichannel ultrasonoscope measuring device of the invention, use a set of ultrasonic wave transmitting receive and processing circuit, utilize
Switching switch switch over to detect the signal of multiple sound channels, formed with the hardware that this simplifies meter, reduce meter at
This, reduces the volume of meter, develops conducive to ultrasonoscope measuring device to smaller volume direction, makes it possible to be suitable for more multi-environment
In；On the other hand, only one sound channel of each duty cycle is detected and other sound channels are in high-impedance state, with this, is counted
Amount can greatly reduce the operand of microprocessor when obtaining fluid flow rate, conducive to the precision and timeliness for improving metering.
Thirdly, multichannel supersonic wave metering method of the invention, cooperate the multichannel supersonic wave metering of optimizing structure design
Device can reduce measurement error, improve measuring accuracy, it is ensured that meter being capable of continuous for a long time, stable operation.
Detailed description of the invention
Fig. 1 is the pipeline section interface schematic diagram of preferred embodiment of the present invention metering flow or flow velocity；
Fig. 2 is the structural block diagram of multichannel ultrasonoscope measuring device in the preferred embodiment of the present invention；
Fig. 3 is the internal structure block diagram of multichannel ultrasonoscope measuring device in the preferred embodiment of the present invention.
Wherein: 2- pipeline section, 4- sound channel.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples, so that those skilled in the art can be with
It more fully understands the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
Embodiment one
As shown in Figure 1-3, present embodiment discloses a kind of multichannel ultrasonoscope measuring devices, for measuring fluid in pipeline section
Perhaps the fluid of flow herein can be liquid or gas to flow velocity.Above-mentioned ultrasonoscope measuring device includes ultrasonic transducer, micro-
Processor U2, switching switch U1 and ultrasonic transmitter-receiver U3；
As shown in Figure 1, be equipped with multiple sound channels 4 in above-mentioned pipeline section 2, sound channel 4 herein is sound wave transmission channels, in pipeline section 2
Fluid be Acoustic Wave Propagation medium.In the present embodiment technical solution, at least two sound channels 4 are equipped in above-mentioned pipeline section 2, for example, 2
A, 3,4 ... even more sound channels 4, do not limit the number of sound channel 4 herein.As shown in Figure 1, multiple above-mentioned
Sound channel 4 is set gradually in the cross-sectional direction of pipeline section 2；Corresponding each above-mentioned sound channel 4 is all provided with there are two above-mentioned ultrasonic transducer,
Two above-mentioned ultrasonic transducers are set gradually along the flow direction of fluid, respectively upstream ultrasonic wave transducer and downstream ultrasonic
Wave transducer.
Above-mentioned switching switch U1 is connect with microprocessor U2 and ultrasonic transmitter-receiver U3, is used to receive above-mentioned micro- place
Manage the sound channel switching signal that device U2 is sent, and switched according to above-mentioned sound channel switching signal ultrasonic transmitter-receiver U3 from it is different
The ultrasonic transducer of sound channel connects.
Above-mentioned ultrasonic transmitter-receiver U3 is for generating and sending ultrasonic signal to ultrasonic transducer, reception ultrasound
The ultrasonic signal that wave transducer is sent, and the time interval for sending ultrasonic signal and received ultrasonic signal is sent to micro-
Processor U2；
Above-mentioned microprocessor U2 is connect with switching switch U1 and ultrasonic transmitter-receiver U3, for generating and sending sound channel
Switching signal to switch switch；For generating and sending metering signal to above-mentioned ultrasonic transmitter-receiver U3, above-mentioned ultrasonic wave
Transmitter-receiver U3 sends or receives ultrasonic signal according to metering signal；It is also used to receive above-mentioned ultrasonic transmitter-receiver U3
The time interval of transmission, and according to the flow velocity or flow of fluid in above-mentioned time interval run of designing.
Specifically, as shown in figure 3, above-mentioned ultrasonic transmitter-receiver U3 has the first signal end D+ and second signal end
D-, above-mentioned ultrasonic transmitter-receiver U3 select one in the first signal end D+ and second signal end D- according to above-mentioned metering signal
A to be used as transmission ultrasonic signal end, another is used as received ultrasonic signal end.
Above-mentioned switching switch U1 have the first switching contact J1 and the second switching contact J2, above-mentioned first switching contact J1 and
One end of both second switching contact J2 is connect with the first signal end D+ and second signal end D- respectively；Above-mentioned switching switch U1 root
According to the other end of above-mentioned sound channel switching signal control the first switching contact J1 and the second switching contact J2 respectively and in different sound channels
Upstream ultrasonic wave transducer connected with downstream ultrasonic wave transducer.
For ease of description, the course of work of two sound channel meters is described below, the course of work are as follows:
Microprocessor U2 generates sound channel switching switch, switching switch selection ultrasonic transmitter-receiver U3 and first sound channel
Ultrasonic transducer connection, second sound channel be in high-impedance state.Specifically, the first signal of ultrasonic transmitter-receiver U3
End D+ and second signal end D- is connect with the first switching contact J1 and the second switching contact J2 respectively, the first switching contact J1 and the
The other end of two switching contact J2 respectively with the super refreshing wave transducer D1+ in upstream and downstream ultrasonic wave transducer in first sound channel
D1- connection；Microprocessor generates metering signal, so that the first signal end D+ sends ultrasonic pulse, second signal end D- is received
Ultrasonic signal, ultrasonic transmitter-receiver U3 metering ultrasonic signal are issued to the time interval for receiving ultrasonic signal
T11；Microprocessor generates metering signal, so that second signal end D- sends ultrasonic pulse, the first signal end D+ receives ultrasound
Wave signal, ultrasonic transmitter-receiver U3 metering ultrasonic signal are issued to the time interval T12 for receiving ultrasonic signal.It is super
Time interval T12 and time interval T11 are sent to microprocessor U2 by sound wave transmitter-receiver U3, and microprocessor U2 is according to the time
It is spaced the fluid flow rate that T12 and time interval T11 calculates first sound channel.
Microprocessor U2 generates sound channel switching switch, switching switch selection ultrasonic transmitter-receiver U3 and second sound channel
Ultrasonic transducer connection, first sound channel be in high-impedance state.Specifically, the first signal of ultrasonic transmitter-receiver U3
End D+ and second signal end D- is connect with the first switching contact J1 and the second switching contact J2 respectively, the first switching contact J1 and the
The other end of two switching contact J2 respectively with the super refreshing wave transducer D2+ in upstream and downstream ultrasonic wave transducer in second sound channel
D2- connection；Microprocessor generates metering signal, so that the first signal end D+ sends ultrasonic pulse, second signal end D- is received
Ultrasonic signal, ultrasonic transmitter-receiver U3 metering ultrasonic signal are issued to the time interval for receiving ultrasonic signal
T21；Microprocessor U2 generates metering signal, so that second signal end D- sends ultrasonic pulse, the first signal end D+ receives super
Acoustic signals, ultrasonic transmitter-receiver U3 metering ultrasonic signal are issued to the time interval T22 for receiving ultrasonic signal.
Time interval T22 and time interval T21 are sent to microprocessor U2 by ultrasonic transmitter-receiver U3, microprocessor U2 according to when
Between interval T22 and time interval T21 calculate second sound channel fluid flow rate.
Microprocessor U2 is according to the fluid flow rate of sound channel and second sound channel come the fluid flow rate in run of designing.
The case where corresponding to more than two sound channels, microprocessor U2 configure multiple pins and control for output channels switching signal
Switch the movement of switch U1, for example, 00 first sound channel of expression of microprocessor U2 output enters metering there are three when sound channel, the
Two sound channels and third sound channel are in high-impedance state；01 second sound channel of expression of microprocessor U2 output enters metering, and first
A sound channel and third sound channel are in high-impedance state；10 expression third sound channels of microprocessor U2 output enter metering, and first
Sound channel and second sound channel are in high-impedance state.When more corresponding sound channels and so on.
In another embodiment of the application, the case where correspondence more than two sound channels, it can also be multiple analog switches
In parallel to select an analog switch job by piece choosing, other analog switch work are in high-impedance state.
Specifically, above-mentioned switching switch is analog switch, above-mentioned analog switch can be relay, transistor, Yi Jiqi
He has the electric device of control terminal and multiple contacts.Analog switch have low in energy consumption, speed it is fast, without mechanical contact, small in size
With characteristic with long service life.
Further, above-mentioned microprocessor U2 is also used to export chip selection signal, above-mentioned switching switch according to chip selection signal into
Enter dormant state or working condition.Power consumption of the switching switch when not working can be reduced with this.
In view of fluid in pipeline section 2 close to the actual conditions that die position is different with the flow velocity at the pipe wall position,
Wherein, close to die position flow velocity it is big, close to pipe wall position flow velocity it is small, above-mentioned pipeline section 2 close to its die position two-by-two
Spacing between sound channel 4 is less than the spacing between the sound channel two-by-two 4 of its pipe wall position.It is, fluid flows fast area
More sound channels are arranged compared to slow region is flowed in domain, are conducive to the accuracy and accuracy that improve metering.
Embodiment two
Present embodiment discloses a kind of multichannel supersonic wave metering methods to use for measuring the flow velocity of fluid in pipeline section
The meter of the above structure comprising following steps,
(1) the first signal end of ultrasonic transmitter-receiver and second signal end are super with the upstream of one of sound channel respectively
Acoustic wave transducer is connected with downstream ultrasonic wave transducer；
(2) the first signal end of ultrasonic transmitter-receiver sends ultrasonic pulse, and second signal end receives ultrasonic wave letter
Number, the first signal end of measurement sends a signal to the time interval T1 of the second signal termination collection of letters number；
(3) the second signal end of ultrasonic transmitter-receiver sends ultrasonic pulse, and the first signal end receives ultrasonic wave letter
Number, measurement second signal end sends a signal to the time interval T2 that the first signal end receives signal end；
(4) microprocessor according to the following formula in a run of designing current channel fluid flow rate υi:
υi=(T2-T1) * C (formula one)
Wherein, T2 is the time interval that second signal end sends a signal to that the first signal end receives signal end；T1 is first
Signal end sends a signal to the time interval of the second signal termination collection of letters number；C is the speed that ultrasonic wave is propagated in fluid；
(5) the first signal end of ultrasonic transmitter-receiver and second signal the end upstream ultrasonic with next sound channel respectively
Wave transducer is connected with downstream ultrasonic wave transducer；It is repeated in step (2)~step (4), each sound channel in run of designing
Fluid flow rate υi, i is sound channel serial number；
(6) microprocessor according to the following formula in two run of designing fluid flow velocity V:
Wherein, n is the number of sound channel in pipeline section.
The multichannel ultrasonoscope measuring device of the application, fluid is in pipeline section close to die position and at pipe wall position
Flow fluctuation is different, wherein the fluctuation close to die position is big, and the fluctuation close to pipe wall position is small, for accurate measurement, originally
In embodiment technical solution, above-mentioned metering method further include microprocessor according to the following formula in three run of designing fluid stream
Speed:
Wherein, AiFor the weight of i-th of sound channel flow velocity, 0 < Ai< 1, n are the number of sound channel in pipeline section；Above-mentioned pipeline section is close
The sound channel flow velocity weight of its pipe wall position is less than the sound channel flow velocity weight close to its die position.By adjusting each sound channel fluid
The weight of flow velocity can balance the flow fluctuation at different sound channels, to improve the accuracy and accuracy of metering.
Embodiment three
The present invention provides a kind of multichannel supersonic wave metering method, for measuring the flow of fluid in pipeline section, use with
The meter of upper structure comprising following steps,
(1) the first signal end of ultrasonic transmitter-receiver and second signal end are super with the upstream of one of sound channel respectively
Acoustic wave transducer is connected with downstream ultrasonic wave transducer；
(2) the first signal end of ultrasonic transmitter-receiver sends ultrasonic pulse, and second signal end receives ultrasonic wave letter
Number, the first signal end of measurement sends a signal to the time interval T1 of the second signal termination collection of letters number；
(3) the second signal end of ultrasonic transmitter-receiver sends ultrasonic pulse, and the first signal end receives ultrasonic wave letter
Number, measurement second signal end sends a signal to the time interval T2 that the first signal end receives signal end；
(4) microprocessor according to the following formula in a run of designing current channel fluid flow rate υi:
υi=(T2-T1) * C (formula one)
Wherein, T2 is the time interval that second signal end sends a signal to that the first signal end receives signal end；T1 is first
Signal end sends a signal to the time interval of the second signal termination collection of letters number；C is the speed that ultrasonic wave is propagated in fluid；
(5) the first signal end of ultrasonic transmitter-receiver and second signal the end upstream ultrasonic with next sound channel respectively
Wave transducer is connected with downstream ultrasonic wave transducer；It is repeated in step (2)~step (4), each sound channel in run of designing
Fluid flow rate υi, i is sound channel serial number；
(6) microprocessor according to the following formula in two run of designing fluid flow velocity V:
Wherein, n is the number of sound channel in pipeline section；
(7) microprocessor according to the following formula in four run of designing fluid flow F:
Wherein S is the pipeline section cross-sectional area for having fluid section in pipeline section.
The multichannel ultrasonoscope measuring device of the application, fluid is in pipeline section close to die position and at pipe wall position
Flow fluctuation is different, wherein the fluctuation close to die position is big, and the fluctuation close to pipe wall position is small, for accurate measurement, originally
In embodiment technical solution, above-mentioned metering method include microprocessor according to the following formula in five run of designing fluid flow:
Wherein, AiFor the weight of i-th of sound channel flow velocity, above-mentioned pipeline section is less than close to the sound channel flow velocity weight of its pipe wall position
Sound channel flow velocity weight close to its die position.By adjusting the weight of each sound channel fluid flow rate, different sound channels can be balanced
The flow fluctuation at place, to improve the accuracy and accuracy of metering.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention
It encloses without being limited thereto.Those skilled in the art's made equivalent substitute or transformation on the basis of the present invention, in the present invention
Protection scope within.Protection scope of the present invention is subject to claims.
Claims (10)
1. a kind of multichannel ultrasonoscope measuring device, for measuring the flow velocity or flow of fluid in pipeline section, including ultrasonic wave transducer
Device, it is characterised in that: it further includes microprocessor, switching switch and ultrasonic transmitter-receiver；
Multiple sound channels are equipped in the pipeline section, multiple sound channels are set gradually in the cross-sectional direction of pipeline section；Corresponding each institute
It states sound channel to be all provided with there are two the ultrasonic transducer, two ultrasonic transducers are successively set along the flow direction of fluid
It sets, respectively upstream ultrasonic wave transducer and downstream ultrasonic wave transducer；
The switching switch is connect with microprocessor and ultrasonic transmitter-receiver, is used to receive what the microprocessor was sent
Sound channel switching signal, and switch according to the sound channel switching signal ultrasonic waves of ultrasonic transmitter-receiver from different sound channels
It can device connection；
The ultrasonic transmitter-receiver is for generating and sending ultrasonic signal to ultrasonic transducer, reception ultrasonic wave transducer
The ultrasonic signal that device is sent, and the time interval for sending ultrasonic signal and received ultrasonic signal is sent to micro process
Device；
The microprocessor is connect with switching switch and ultrasonic transmitter-receiver, for generating and sending sound channel switching signal extremely
Switching switch；For generating and sending metering signal to the ultrasonic transmitter-receiver, the ultrasonic transmitter-receiver root
Ultrasonic signal is sent or received according to metering signal；It is also used to receive the time interval that the ultrasonic transmitter-receiver is sent,
And according to the flow velocity or flow of fluid in the time interval run of designing.
2. multichannel ultrasonoscope measuring device as described in claim 1, it is characterised in that: the ultrasonic transmitter-receiver has
First signal end and second signal end, the ultrasonic transmitter-receiver is according to the metering signal in the first signal end and second
It selects one to be used as in signal end and sends ultrasonic signal end, another is used as received ultrasonic signal end.
3. multichannel ultrasonoscope measuring device as claimed in claim 2, it is characterised in that: the switching switch has the first switching
One end of both contact and the second switching contact, first switching contact and the second switching contact respectively with the first signal end and
The connection of second signal end；The switching switch controls the first switching contact and the second switching contact according to the sound channel switching signal
The other end respectively from different sound channels upstream ultrasonic wave transducer and downstream ultrasonic wave transducer connect.
4. multichannel ultrasonoscope measuring device as described in claim 1, it is characterised in that: the switching switch is analog switch.
5. multichannel ultrasonoscope measuring device as described in claim 1, it is characterised in that: the microprocessor is also used to output chip
Signal is selected, the switching switch enters dormant state or working condition according to chip selection signal.
6. multichannel ultrasonoscope measuring device as described in claim 1, it is characterised in that: the pipeline section is close to its die position
The spacing between sound channel is less than the spacing between the sound channel two-by-two of its pipe wall position two-by-two.
7. a kind of multichannel supersonic wave metering method, for measuring the flow velocity of fluid in pipeline section, it is characterised in that: wanted using right
Seek the described in any item meters of 1-6 comprising following steps,
(1) the first signal end of ultrasonic transmitter-receiver and second signal the end upstream ultrasonic with one of sound channel respectively
Energy converter is connected with downstream ultrasonic wave transducer；
(2) the first signal end of ultrasonic transmitter-receiver sends ultrasonic pulse, and second signal end received ultrasonic signal is surveyed
Fixed first signal end sends a signal to the time interval T1 of the second signal termination collection of letters number；
(3) the second signal end of ultrasonic transmitter-receiver sends ultrasonic pulse, and the first signal end received ultrasonic signal is surveyed
Determine second signal end and sends a signal to the time interval T2 that the first signal end receives signal end；
(4) microprocessor according to the following formula in a run of designing current channel fluid flow rate υi:
υi=(T2-T1) * C (formula one)
Wherein, T2 is the time interval that second signal end sends a signal to that the first signal end receives signal end；T1 is the first signal
End sends a signal to the time interval of the second signal termination collection of letters number；C is the speed that ultrasonic wave is propagated in fluid；
(5) upstream ultrasonic of the first signal end and second signal end of ultrasonic transmitter-receiver respectively with next sound channel changes
Energy device is connected with downstream ultrasonic wave transducer；It is repeated in step (2)~step (4), the fluid of each sound channel in run of designing
Flow velocity υi, i is sound channel serial number；
(6) microprocessor according to the following formula in two run of designing fluid flow velocity V:
Wherein, n is the number of sound channel in pipeline section.
8. multichannel supersonic wave metering method as claimed in claim 7, it is characterised in that: microprocessor according to the following formula three
The flow velocity of fluid in run of designing:
Wherein, AiFor the weight of i-th of sound channel flow velocity, the pipeline section is less than close close to the sound channel flow velocity weight of its pipe wall position
The sound channel flow velocity weight of its die position.
9. a kind of multichannel supersonic wave metering method, for measuring the flow of fluid in pipeline section, it is characterised in that: wanted using right
Seek the described in any item meters of 1-6 comprising following steps,
(1) the first signal end of ultrasonic transmitter-receiver and second signal the end upstream ultrasonic with one of sound channel respectively
Energy converter is connected with downstream ultrasonic wave transducer；
(2) the first signal end of ultrasonic transmitter-receiver sends ultrasonic pulse, and second signal end received ultrasonic signal is surveyed
Fixed first signal end sends a signal to the time interval T1 of the second signal termination collection of letters number；
(3) the second signal end of ultrasonic transmitter-receiver sends ultrasonic pulse, and the first signal end received ultrasonic signal is surveyed
Determine second signal end and sends a signal to the time interval T2 that the first signal end receives signal end；
(4) microprocessor according to the following formula in a run of designing current channel fluid flow rate υi:
υi=(T2-T1) * C (formula one)
Wherein, T2 is the time interval that second signal end sends a signal to that the first signal end receives signal end；T1 is the first signal
End sends a signal to the time interval of the second signal termination collection of letters number；C is the speed that ultrasonic wave is propagated in fluid；
(5) upstream ultrasonic of the first signal end and second signal end of ultrasonic transmitter-receiver respectively with next sound channel changes
Energy device is connected with downstream ultrasonic wave transducer；It is repeated in step (2)~step (4), the fluid of each sound channel in run of designing
Flow velocity υi, i is sound channel serial number；
(6) microprocessor according to the following formula in two run of designing fluid flow velocity V:
Wherein, n is the number of sound channel in pipeline section；
(7) microprocessor according to the following formula in four run of designing fluid flow F:
Wherein S is the pipeline section cross-sectional area for having fluid section in pipeline section.
10. multichannel supersonic wave metering method as claimed in claim 9, it is characterised in that: microprocessor is according to the following formula
The flow of fluid in five run of designing:
Wherein, AiFor the weight of i-th of sound channel flow velocity, the pipeline section is less than close close to the sound channel flow velocity weight of its pipe wall position
The sound channel flow velocity weight of its die position.
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| CN115876269B (en) * | 2022-11-29 | 2024-01-12 | 青岛鼎信通讯科技有限公司 | Multichannel ultrasonic water meter |
| CN116961629A (en) * | 2023-06-26 | 2023-10-27 | 苏州东剑智能科技有限公司 | Ultrasonic amplification control circuit and ultrasonic instrument using same |
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