CN108337602A - A kind of flow audio converting means and transform method - Google Patents
A kind of flow audio converting means and transform method Download PDFInfo
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- CN108337602A CN108337602A CN201810122103.3A CN201810122103A CN108337602A CN 108337602 A CN108337602 A CN 108337602A CN 201810122103 A CN201810122103 A CN 201810122103A CN 108337602 A CN108337602 A CN 108337602A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 45
- 230000002093 peripheral effect Effects 0.000 claims abstract description 30
- 230000008676 import Effects 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 37
- 238000009792 diffusion process Methods 0.000 claims description 12
- 230000005236 sound signal Effects 0.000 claims description 12
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- 238000009434 installation Methods 0.000 claims description 6
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- 101150029607 SS18L1 gene Proteins 0.000 description 30
- 238000005259 measurement Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/05—Detection of connection of loudspeakers or headphones to amplifiers
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- Acoustics & Sound (AREA)
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- Measuring Volume Flow (AREA)
Abstract
The invention discloses a kind of flow audio converting means and transform methods, including ingress pipe, main cylinder and secondary cylinder, ingress pipe to import and be measured fluid；Main cylinder occludes one end with both ends of the surface, and the central portion perforating in other end forms, so that the measured fluid imported from the ingress pipe is flowed into along the inner peripheral surface of main cylinder, and stream is whirled up along inner circumferential surface, and the swirling flow is made to be flowed out from the hole；Secondary cylinder, connects the hole of the other end of the main cylinder, and is provided projectingly, and flows into swirling flow from the main cylinder via the hole, the swirling flow is made to generate precessional motion and be released to outside.The audio of frequency corresponding with the fluid flow of measured object can be easily transformed to.In addition, by listening its audio in the assay, by the sense of hearing of people can monitor flow number, and be easy to differentiate.
Description
Technical field
The present invention relates to the technical fields that the flow of measuring object is transformed to audio frequency, and in particular to a kind of flow
Audio converting means and transform method.
Background technology
Device shown in Fig. 10 is the device of the fluid flow for measure object, has cylindrical pipe 3, cylindrical pipe 3
The expiration is passed through when being blown into expiration at a heat to outlet 5 from its entrance 4 with gentle throttle 1 and pressure valve 2
Pressure sensor 6 set on the upstream side of pressure valve 2 is transformed to electric signal.The electric signal of the transformation turns via amplifier 7, A/D
Parallel operation 8 is transformed to digital signal, and carries out calculation process by CPU9.The result of calculation process is shown in display device 10, and
It is recorded in memory 11 (for example, referring to patent document 1).
Existing technical literature, patent document, patent document 1：Japanese Unexamined Patent Publication 07-167694 bulletins.
Invention content
The purpose of the present invention i.e. be to overcome the shortage of prior art, and it is an object of the present invention to provide a kind of flow audio converting means and
Transform method has the following problems a little in existing flow audio converting means described above, that is, exhaled with being blown at a heat
Gas is exhaled at a heat by cylindrical pipe 3, accordingly, it is difficult to be distinguished as in measurement.
The present invention is achieved through the following technical solutions：
A kind of flow audio converting means, including ingress pipe, main cylinder and secondary cylinder,
Ingress pipe imports and is measured fluid；
Main cylinder occludes one end, and the central portion perforating in other end is formed with both ends of the surface, make from
The measured fluid that the ingress pipe imports is flowed into along the inner peripheral surface of main cylinder, and is whirled up stream along inner circumferential surface,
And the swirling flow is made to be flowed out from the hole；
Secondary cylinder, connects the hole of the other end of the main cylinder, and is provided projectingly, via the hole from the main cylinder
Swirling flow is flowed into, the swirling flow is made to generate precessional motion and be released to outside.
The audio of frequency corresponding with the fluid flow of measured object can be easily transformed to.In addition, by surveying
Its fixed pleasant to the ear audio, by the sense of hearing of people can monitor flow number, and be easy to differentiate.
Further, the ingress pipe is arranged with the tangential direction of the inner peripheral surface of the main cylinder, along the tangent line from institute
It states ingress pipe and supplies the measured fluid into the main cylinder.
It is flowed by the tangent line of the inner peripheral surface along main cylinder and is measured fluid, prevent the generation of turbulent flow, one side energy on one side
Enough it is whirled up stream.
Further, the main cylinder is by cylindrical cavity and the first side plate and the second side plate structure that occlude its both ends of the surface
At being equipped with circular hole in the central portion of the second side plate, be equipped with ingress pipe in the inner peripheral surface of the cylindrical cavity second opens
Mouthful, the ingress pipe is arranged close to the first side plate side for occlusion, in addition, making the quilt flowed into from the first opening of ingress pipe
It measures fluid to flow into along the inner peripheral surface of the main cylinder from the second opening, and stream is whirled up along inner circumferential surface.
Further, the ingress pipe leans on the position of proximal panel side in the installation site of main cylinder, and is measured fluid
The blow-off direction mode consistent with the inner peripheral surface tangential direction of main cylinder is installed, so as to generate the less swirling flow of turbulent flow.
Further, the secondary cylinder is made of the cylinder of both ends open, is had and is arranged in the of the main cylinder
The through hole of the diameter same diameter in the hole of two side plates, and installed in a manner of surrounding hole by the inner peripheral surface of secondary cylinder, make into
It flows into, precessional motion is carried out to swirling flow in secondary main cylinder chamber room and releases from hole for the measured fluid of the swirling flow,
Swirling flow is with horn-like diffusion；The swirling flow of the horn-like diffusion sends out audio by precessional motion；The frequency of the audio with
Flow is becoming proportionately larger；The size of flow can be grasped with the frequency of audio by measuring personnel as a result,.
Further, further include Electret Condencer Microphone, filter, crest frequency detection circuit, crest frequency detection circuit
And integrating circuit, the Electret Condencer Microphone are proximate to secondary main cylinder chamber setting, the Electret Condencer Microphone detection by from
The audio that the swirling flow that the main cylinder chamber of pair is flowed out along with precessional motion generates；The filter is to remove the circle
The filter of the noise generated in cylindrical chamber, secondary main cylinder chamber, the crest frequency detection circuit are inputted from the mistake
The audio signal of the frequency of filter supply, and the crest frequency detection circuit of the crest frequency using FFT detection audio signals, institute
The crest frequency that crest frequency detection circuit will be detected by crest frequency detection circuit is stated, its instantaneous stream is calculated according to crest frequency
Amount, expiratory gas flow is calculated by the value by integrating circuit is integrated.
The present invention is realized by following another technical solutions：
A kind of flow audio conversion method, it is characterised in that：
It is imported from ingress pipe and is measured fluid；Make the measured fluid imported from the ingress pipe along in main cylinder 30
Circumferential surface flows into, and is whirled up stream along inner circumferential surface, and the swirling flow is made to be flowed out from the hole；
Swirling flow is flowed into from the main cylinder via the hole, the swirling flow is made to generate precessional motion and be released to outside.
Further, the ingress pipe leans on the position of proximal panel side in the installation site of main cylinder, and is measured fluid
The blow-off direction mode consistent with the inner peripheral surface tangential direction of main cylinder is installed, so as to generate the less swirling flow of turbulent flow.
Further, the secondary cylinder is made of the cylinder of both ends open, is had and is arranged in the of the main cylinder
The through hole of the diameter same diameter in the hole of two side plates, and installed in a manner of surrounding hole by the inner peripheral surface of secondary cylinder, make into
It flows into, precessional motion is carried out to swirling flow in secondary main cylinder chamber room and releases from hole for the measured fluid of the swirling flow,
Swirling flow is with horn-like diffusion；The swirling flow of the horn-like diffusion sends out audio by precessional motion；The frequency of the audio with
Flow is becoming proportionately larger；The size of flow can be grasped with the frequency of audio by measuring personnel as a result,.
Further, Electret Condencer Microphone detection is flowed out by from the main cylinder chamber of the pair along with precessional motion
The audio that swirling flow generates；Filter is the filter for removing the noise generated in the cylindrical cavity, secondary main cylinder chamber,
Crest frequency detection circuit is to input the audio signal of the frequency supplied from the filter, and detect audio signal using FFT
Crest frequency crest frequency detection circuit, crest frequency detection circuit by the peak value detected by crest frequency detection circuit frequency
Rate calculates its instantaneous flow according to crest frequency, which is calculated expiratory gas flow by the integrating circuit is integrated.
Compared with prior art, the present invention having the following advantages and advantages：
Flow, is transformed to the frequency of audio, measurement personnel are by listening the sound by a kind of flow audio converting means of the present invention
Frequently, according to frequency variation can judge flow number, realize as in measurement.It can easily be transformed to and measured object
The corresponding frequency of fluid flow audio.In addition, by listening its audio in the assay, flow can be monitored by the sense of hearing of people
Number, and be easy differentiate.It is flowed by the tangent line of the inner peripheral surface along main cylinder and is measured fluid, prevent the production of turbulent flow on one side
It is raw, it can be whirled up stream on one side.
The structure of the device of the invention is simple, and can grasp flow with the frequency of audio, therefore, is easy monitoring, and
Flow can quantitatively be grasped.In addition to this, in the assay, the flow for being transformed to frequency can be experienced by the sense of hearing of people
Size.
It is measured fluid in addition, being flowed by the tangent line of the inner peripheral surface along main cylinder, prevents the generation of turbulent flow on one side, one
Side can be whirled up stream, and precision can be improved.
Description of the drawings
Attached drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is the stereogram of the flow detector for illustrating one embodiment of the present of invention.
Fig. 2 is the side view definition graph from the stereogram of Y-direction observation chart 1.
Fig. 3 is to face definition graph from the stereogram of Z-direction observation chart 1.
Fig. 4 is the CD cross sectional illustration figures of flow audio converting means shown in Fig. 3.
Fig. 5 is the AB cross sectional illustration figures of flow audio converting means shown in Fig. 2.
Fig. 6 is that measured fluid M flows into air inlet pipe 20, becomes swirling flow N in main cylinder 30 and until to secondary cylinder 40
The definition graph of outflow.
Fig. 7 is that measured fluid M is flowed into main cylinder 30 and become swirling flow N and flowed out to secondary cylinder 40, later until with
The definition graph that precessional motion is released.
Fig. 8 is the circuit block definition graph until calculating flow according to the frequency signal exported from microphone 50.
Fig. 9 is the definition graph for illustrating to export crest frequency from microphone 50.
Figure 10 is the cross sectional illustration figure for illustrating conventional example.
Label and corresponding parts title in attached drawing：
1- throttles, 2- pressure valve, 3- cylindrical pipes, 4- entrances, the outlets 5-, 6- pressure sensors, 7- amplifiers, 8-A/
D converters, 9-CPU, 10- display devices, 11- memories, 20- ingress pipes, 20a- first are open, and 20b- second is open, 30- master
Cylinder, the main cylinder chambers of 30a-, the first side plates of 30b-, the second side plates of 30c-, 30d- circular holes, 40- pair cylinders, 40a- through holes,
50- Electret Condencer Microphones, 51- filters, 52- crest frequency detection circuits, 53- instantaneous flows, 54- integrating circuit.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment 1
A kind of flow audio converting means of the present invention, hereinafter, illustrating embodiments of the present invention based on Fig. 1~Fig. 9.
In figure, 20 be the ingress pipe (air inlet pipe) of measured fluid circulation tubular, its both ends be equipped with the first opening 20a,
Second opening 20b.
30 be the main circle formed with the first side plate 30b, the second side plate 30c for occluding its both ends of the surface by cylindrical cavity 30a
Cylinder, the central portion of the second side plate 30c in its first side plate 30b, the second side plate 30c are equipped with circular hole 30d.In addition, upper
The inner peripheral surface for stating cylindrical cavity 30a is equipped with the front end of one of above-mentioned air inlet pipe 20 part opening 20b, also, above-mentioned
Air inlet pipe 20 is arranged close to the sides side plate 30b for occlusion.In addition, making to flow into from the first opening 20a of above-mentioned air inlet pipe 20
Measured fluid M flowed into from another second opening 20b along the inner peripheral surface of above-mentioned main cylinder 30, and generated along inner circumferential surface
Swirling flow N.
It should be noted that as above-mentioned, air inlet pipe 20 is to installing the installation site of main cylinder 30a with close in air inlet pipe 20
The position of second sides side plate 30b, and the blow-off direction of measured fluid M and the inner peripheral surface tangent line of main cylinder 30 are (in Fig. 6, with list
Chain-dotted line indicates) the consistent mode in direction installs, and thereby, it is possible to generate the less swirling flow N of turbulent flow.
Secondary cylinder 40 is the secondary cylinder being made of the cylinder of both ends open, has and is arranged in the second of above-mentioned main cylinder 30
The through hole 40a of the diameter same diameter of the hole 30d of side plate 30b, and to surround the above-mentioned holes 30d by the inner peripheral surface of secondary cylinder 40
Mode install.The measured fluid for becoming above-mentioned swirling flow N is flowed into from above-mentioned hole 30d, right in secondary main cylinder chamber 40a
Swirling flow carries out precessional motion and releases, and swirling flow is with horn-like diffusion.It should be noted that the swirling flow of the horn-like diffusion
P sends out audio by precessional motion.As shown in figure 9, the frequency of the audio is becoming proportionately larger with flow.People is measured as a result,
Member can grasp the size of flow with the frequency of audio.
Electret Condencer Microphone 50 is provided near the main cylinder chamber of above-mentioned pair 40, and is detected by from the above-mentioned main cylinder of pair
The Electret Condencer Microphone for the audio that the swirling flow P that chamber 40 is flowed out along with precessional motion is generated.51 be to remove above-mentioned cylinder
The filter of the noise generated in shape chamber 30a, secondary main cylinder chamber 40a, 52 be to input the frequency supplied from above-mentioned filter 51
The audio signal of rate, and detect electricity using the crest frequency of the crest frequency of FFT (Fast Fourier Transform) detection audio signals
Road, the crest frequency detected by crest frequency detection circuit 52 calculate its instantaneous flow according to crest frequency as shown in Figure 9, will
The value is integrated by aftermentioned integrating circuit 54, and calculates expiratory gas flow.
It should be noted that the left side of the bottom right oblique line T of above-mentioned crest frequency detection circuit 52 detection in fig.9 occur with
The frequency of the peak value waveform for the chevron that symbol S is indicated, judgement is closest with the waveform of which flow, then, calculates instantaneous flow
53, the value is integrated by aftermentioned integrating circuit 54, and calculate expiratory gas flow.Crest frequency detection circuit 52 can adopt
Its function is realized with AD637 peak detection circuits；Integrating circuit 54 may be used RC integrating circuit and realize its function.
Flow, is transformed to the frequency of audio, measurement personnel are by listening the sound by a kind of flow audio converting means of the present invention
Frequently, according to frequency variation can judge flow number, realize as in measurement.It can easily be transformed to and measured object
The corresponding frequency of fluid flow audio.In addition, by listening its audio in the assay, flow can be monitored by the sense of hearing of people
Number, and be easy differentiate.It is flowed by the tangent line of the inner peripheral surface along main cylinder and is measured fluid, prevent the production of turbulent flow on one side
It is raw, it can be whirled up stream on one side.
The structure of the device of the invention is simple, and can grasp flow with the frequency of audio, therefore, is easy monitoring, and
Flow can quantitatively be grasped.In addition to this, in the assay, the flow for being transformed to frequency can be experienced by the sense of hearing of people
Size.
It is measured fluid in addition, being flowed by the tangent line of the inner peripheral surface along main cylinder, prevents the generation of turbulent flow on one side, one
Side can be whirled up stream, and precision can be improved.
Embodiment 2
A kind of flow audio conversion method of the present invention, hereinafter, illustrating embodiments of the present invention based on Fig. 1~Fig. 9.
A kind of flow audio conversion method imports from ingress pipe 20 and is measured fluid；Make to import from the ingress pipe 20
Measured fluid is flowed into along the inner peripheral surface of main cylinder 30, and is whirled up stream along inner circumferential surface, and make the swirling flow from
The hole outflow；
Swirling flow is flowed into from the main cylinder 30 via the hole, so that the swirling flow is generated precessional motion and is put to outside
Go out.
The ingress pipe 20 leans on the position of the sides proximal panel 30b in the installation site of main cylinder 30a, and is measured blowing for fluid
The outgoing direction mode consistent with the inner peripheral surface tangential direction of main cylinder 30 is installed, so as to generate the less swirling flow of turbulent flow.
The pair cylinder 40 is made of the cylinder of both ends open, is had and the second side plate for being arranged in the main cylinder 30
The through hole 40a of the diameter same diameter of the hole 30d of 30b, and pacified in a manner of surrounding hole 30d by the inner peripheral surface of secondary cylinder 40
Dress, the measured fluid for becoming the swirling flow are flowed into from hole 30d, are revolved to swirling flow in secondary main cylinder chamber 40a
Into moving and releasing, swirling flow is with horn-like diffusion；The swirling flow of the horn-like diffusion sends out audio by precessional motion；It should
The frequency of audio is becoming proportionately larger with flow；The size of flow can be grasped with the frequency of audio by measuring personnel as a result,.
The detection of Electret Condencer Microphone 50 passes through the convolution flowed out from the main cylinder chamber of the pair 40 along with precessional motion
The raw audio of miscarriage；Filter 51 is the mistake for removing the noise generated in the cylindrical cavity 30a, secondary main cylinder chamber 40a
Filter, crest frequency detection circuit 52 are to input the audio signal of the frequency supplied from the filter 51, and detect using FFT
The crest frequency detection circuit of the crest frequency of audio signal, crest frequency detection circuit 52 will be by crest frequency detection circuits 52
The crest frequency of detection calculates its instantaneous flow according to crest frequency, which is integrated by the integrating circuit 54
And calculate expiratory gas flow.
Flow, is transformed to the frequency of audio, measurement personnel are by listening the sound by a kind of flow audio conversion method of the present invention
Frequently, according to frequency variation can judge flow number, realize as in measurement.It can easily be transformed to and measured object
The corresponding frequency of fluid flow audio.In addition, by listening its audio in the assay, flow can be monitored by the sense of hearing of people
Number, and be easy differentiate.It is flowed by the tangent line of the inner peripheral surface along main cylinder and is measured fluid, prevent the production of turbulent flow on one side
It is raw, it can be whirled up stream on one side.
The present invention can grasp flow with the frequency of audio, therefore, be easy monitoring, and can quantitatively grasp flow.It removes
Except this, in the assay, the size for the flow for being transformed to frequency can be experienced by the sense of hearing of people.In addition, by along master
The tangent line of the inner peripheral surface of cylinder, which flows into, is measured fluid, prevents the generation of turbulent flow on one side, can be whirled up stream on one side, can be improved
Precision.
Above-described specific implementation mode has carried out further the purpose of the present invention, technical solution and advantageous effect
It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the present invention, is not intended to limit the present invention
Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of flow audio converting means, including ingress pipe (20), main cylinder (30) and secondary cylinder (40),
It is characterized in that：
Ingress pipe (20) imports and is measured fluid；
Main cylinder (30) occludes one end, and the central portion perforating in other end is formed with both ends of the surface, make from
The measured fluid that the ingress pipe (20) imports is flowed into along the inner peripheral surface of main cylinder (30), and is generated along inner circumferential surface
Swirling flow, and the swirling flow is made to be flowed out from the hole；
Secondary cylinder (40), connects the hole of the other end of the main cylinder (30), and is provided projectingly, via the hole from the master
Cylinder (30) flows into swirling flow, and the swirling flow is made to generate precessional motion and be released to outside.
2. a kind of flow audio converting means according to claim 1, it is characterised in that：The ingress pipe (20) is with described
The tangential direction of the inner peripheral surface of main cylinder (30) is arranged, interior from the ingress pipe (20) to the main cylinder (30) along the tangent line
Supply the measured fluid.
3. a kind of flow audio converting means according to claim 1, it is characterised in that：The main cylinder (30) is by justifying
Cylindrical chamber (30a) is constituted with the first side plate (30b) and the second side plate (30c) for occluding its both ends of the surface, at the second side plate (30c)
Central portion be equipped with circular hole (30d), be equipped with ingress pipe (20) in the inner peripheral surface of the cylindrical cavity (30a) second opens
Mouth (20b), the ingress pipe (20) is arranged close to the first side plate side (30b) for occlusion, in addition, making from ingress pipe (20)
First opening (20a) flow into measured fluid from second opening (20b) along the main cylinder (30) inner peripheral surface flow into,
And it is whirled up stream along inner circumferential surface.
4. a kind of flow audio converting means according to claim 2, it is characterised in that：The ingress pipe (20) is in main circle
The installation site of cylinder (30a) leans on the position of the side proximal panel (30b), and the blow-off direction of measured fluid and main cylinder (30) is interior
The consistent mode of circumferential surface tangential direction is installed, so as to generate the less swirling flow of turbulent flow.
5. a kind of flow audio converting means according to claim 3, it is characterised in that：The pair cylinder (40) is by two
The cylinder of end opening is constituted, and is had identical as the diameter in hole (30d) of the second side plate (30b) of main cylinder (30) is arranged in
The through hole (40a) of diameter, and installed in a manner of surrounding hole (30d) by the inner peripheral surface of secondary cylinder (40), it becomes described
The measured fluid of swirling flow is flowed into from hole (30d), is carried out precessional motion to swirling flow in secondary main cylinder chamber (40a) and is put
Go out, swirling flow is with horn-like diffusion；The swirling flow of the horn-like diffusion sends out audio by precessional motion；The frequency of the audio
It is becoming proportionately larger with flow；The size of flow can be grasped with the frequency of audio by measuring personnel as a result,.
6. a kind of flow audio converting means according to claim 5, it is characterised in that：It further include Electret Condencer Microphone
(50), filter (51), crest frequency detection circuit (52), crest frequency detection circuit (52) and integrating circuit (54), it is described
Electret Condencer Microphone (50) is proximate to secondary main cylinder chamber (40) setting, and Electret Condencer Microphone (50) detection is by from described
The audio that the swirling flow that secondary main cylinder chamber (40) is flowed out along with precessional motion generates；The filter (51) is to remove institute
State the filter of the noise generated in cylindrical cavity (30a), secondary main cylinder chamber (40a), the crest frequency detection circuit
(52) it is to input the audio signal of the frequency supplied from the filter (51), and use the peak value frequency of FFT detection audio signals
The crest frequency detection circuit (52) of rate, the crest frequency detected by crest frequency detection circuit (52), is calculated according to crest frequency
Go out its instantaneous flow, which is calculated into expiratory gas flow by the integrating circuit (54) is integrated.
7. a kind of flow audio conversion method, it is characterised in that：
It is imported from ingress pipe (20) and is measured fluid；Make the measured fluid imported from the ingress pipe (20) along main cylinder
(30) inner peripheral surface flows into, and is whirled up stream along inner circumferential surface, and the swirling flow is made to be flowed out from the hole；
Swirling flow is flowed into from the main cylinder (30) via the hole, the swirling flow is made to generate precessional motion and be released to outside.
8. a kind of flow audio conversion method according to claim 7, it is characterised in that：The ingress pipe (20) is in main circle
The installation site of cylinder (30a) leans on the position of the side proximal panel (30b), and the blow-off direction of measured fluid and main cylinder (30) is interior
The consistent mode of circumferential surface tangential direction is installed, so as to generate the less swirling flow of turbulent flow.
9. a kind of flow audio conversion method according to claim 8, it is characterised in that：The pair cylinder (40) is by two
The cylinder of end opening is constituted, and is had identical as the diameter in hole (30d) of the second side plate (30b) of main cylinder (30) is arranged in
The through hole (40a) of diameter, and installed in a manner of surrounding hole (30d) by the inner peripheral surface of secondary cylinder (40), it becomes described
The measured fluid of swirling flow is flowed into from hole (30d), is carried out precessional motion to swirling flow in secondary main cylinder chamber (40a) and is put
Go out, swirling flow is with horn-like diffusion；The swirling flow of the horn-like diffusion sends out audio by precessional motion；The frequency of the audio
It is becoming proportionately larger with flow；The size of flow can be grasped with the frequency of audio by measuring personnel as a result,.
10. a kind of flow audio conversion method according to claim 9, it is characterised in that：Electret Condencer Microphone (50) is examined
Survey the audio that the swirling flow by being flowed out from the main cylinder chamber (40) of the pair along with precessional motion generates；Filter (51)
It is the filter for removing the noise generated in the cylindrical cavity (30a), secondary main cylinder chamber (40a), crest frequency detection
Circuit (52) is the audio signal for the frequency that input is supplied from the filter (51), and uses the peak of FFT detection audio signals
It is worth the crest frequency detection circuit (52) of frequency, the crest frequency detected by crest frequency detection circuit is calculated according to crest frequency
Go out its instantaneous flow (53), which is calculated into expiratory gas flow by the integrating circuit (54) is integrated.
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| CN201810122103.3A CN108337602A (en) | 2018-02-07 | 2018-02-07 | A kind of flow audio converting means and transform method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810122103.3A CN108337602A (en) | 2018-02-07 | 2018-02-07 | A kind of flow audio converting means and transform method |
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| CN2310313Y (en) * | 1997-02-18 | 1999-03-10 | 宋军 | Long distance transmission digital indication flow meter |
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