CN102818596A - Vortex shedding flowmeter and acoustic sensor thereof - Google Patents
Vortex shedding flowmeter and acoustic sensor thereof Download PDFInfo
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- CN102818596A CN102818596A CN2012103023133A CN201210302313A CN102818596A CN 102818596 A CN102818596 A CN 102818596A CN 2012103023133 A CN2012103023133 A CN 2012103023133A CN 201210302313 A CN201210302313 A CN 201210302313A CN 102818596 A CN102818596 A CN 102818596A
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Abstract
The invention discloses a vortex shedding flowmeter and an acoustic sensor thereof. The vortex shedding flowmeter comprises a measuring head which is provided with a first sound leading channel and a second sound leading channel. An inlet of the first sound leading channel is located in a wall of a fluid channel. An outlet of the first sound leading channel is connected with the acoustic sensor. The acoustic sensor comprises a first sound wave collecting pin abutted with the outlet of the first sound leading channel and a second sound wave collecting pin abutted with the outlet of the second sound leading channel, and comprises first and second sound wave sensors which respectively receive sound wave signals collected by the two sound wave collecting pins correspondingly and are arranged back to back to evenly eliminate sound wave interference signals in the fluid channel collected by the first sound wave collecting pin in the first sound leading channel. Interference of the sound wave interference signals collected by the first sound wave collecting pin in the fluid channel on the measuring result can be evenly eliminated through the offset effect of the two electret microphones so that the anti-interference capacity of the acoustic sensor and the vortex shedding flowmeter can be improved.
Description
Technical field
The invention belongs to the flow measurement technology field, be specifically related to a kind of vortex shedding flow meter.
Background technology
Vortex shedding flow meter utilizes the Karman vortex street principle to carry out flow measurement.Flying streamlined group fluid to one vertically inserts in the pipeline; Walk around the group fluid and flow along with fluid, produce the whirlpool segregation phenomenon, form well-regulated whirlpool row; The sense of rotation of left and right sides whirlpool is opposite; This whirlpool is called as Karman vortex street, and wherein, the group fluid that produces the whirlpool separation is called as eddy generator.Vortex shedding flow meter is exactly to break away from the frequency of eddy generator and the instrument that the relation between the flow is measured flow according to whirlpool.
For in the Chinese utility model patent instructions of CN201653463U a kind of vortex shedding flow meter is disclosed at Granted publication number; Establish the tubular shell of fluid passage in comprising; In the fluid passage, be provided with eddy generator; After fluid flows through eddy generator, can in the fluid passage, form the vortex street that produces Karman vortex street and produce the zone; On tubular shell, be provided with the measurement passage that supplies extraneous fluid to flow through, measure of import, the other end the outlet for said tubular shell internal fluid channels be connected of passage one end, in measuring passage, be disposed with filtering element, thermal sensing element from its import to outlet for being connected with the tubular shell external world of living in.When fluid flows through eddy generator in the fluid passage of tubular shell; The whirlpool low-pressure area appears behind eddy generator; The fluid media (medium) that impurity is contained in the vortex shedding flow meter external world of living in gets into the measurement passage under pressure; And after filtering element filters, act on the thermal sensing element, measure the frequency that whirlpool takes place in the tubular shell by thermal sensing element at last, and then record the flow of fluid in the fluid passage.
Above-mentioned vortex shedding flow meter has the advantage of firm, highly sensitive and good anti-vibration simple in structure.Its major defect is that durability against pollution is poor, and can only be used to detect the fluid of lower temperature.Just because of these problems, the vortex shedding flow meter of practical application mostly adopts pressure-sensitive detection technique, yet pressure-sensitive method has lower, the shock sensive problem of sensitivity.And the influence that thermal sensing element in above-mentioned temperature-sensitive and the pressure-sensitive measuring method and pressure-active element are vulnerable to the steam in the air-flow to be measured, both are affected by the external environment all bigger.
Summary of the invention
The object of the present invention is to provide a kind of vortex shedding flow meter that is affected by the external environment less with the quick formula sensor of sound; Simultaneously, the present invention also provides a kind of vortex shedding flow meter that uses the quick formula sensor of above-mentioned sound.
For realizing above-mentioned purpose; Vortex shedding flow meter provided by the present invention adopts following technical scheme with the quick formula sensor of sound: a kind of vortex shedding flow meter is with the quick formula sensor of sound; It is characterized in that: comprise be used for vortex shedding flow meter on the fluid passage be connected and collect pin and be used for being connected collecting the second sound wave collection tube pin of extraneous sound wave undesired signal with said fluid passage external environment of living in to collect first sound wave that fluid flows through the formed acoustic signals of whirlpool that produces behind the eddy generator, the quick formula sensor of said sound also comprises and is used for correspondingly respectively receiving two sound waves and collecting the collected acoustic signals of pin and arrange back-to-back with balance and eliminate first, second sonic sensor that first sound wave is collected the sound wave undesired signal of the fluid passage that pin collects.
Described first, second sonic sensor is electret microphone.
Vortex shedding flow meter provided by the present invention adopts following technical scheme: a kind of vortex shedding flow meter; Establish the measuring head of fluid passage in comprising; In measuring head, be installed with the eddy generator of small end towards the rear, fluid passage; Described measuring head be provided with that inlet is connected with the fluid passage first lead that passage and inlet be connected with fluid passage external environment of living in second lead passage; First lead passage inlet be positioned at the vortex street that after fluid flows through eddy generator, forms and produce on the regional corresponding fluidic channel walls; First lead passage outlet connect sound quick formula sensor; The quick formula sensor of this comprise with first lead passage outlet dock with collect first sound wave that fluid flows through the acoustic signals that the whirlpool that produces behind the eddy generator forms collect pin and with second lead passage outlet dock collecting the second sound wave collection tube pin of extraneous sound wave undesired signal, the quick formula sensor of said sound also comprises and correspondingly respectively receives two sound waves and collect the collected acoustic signals of pin and arrange first, second sonic sensor of eliminating the sound wave undesired signal in the fluid passage that first sound wave collection pin collects with balance back-to-back.
Described first, second sonic sensor is electret microphone.
Described first lead passage comprise be opened on the measuring head with flow through eddy generator at fluid after and side opening on the corresponding fluidic channel walls in vortex street zone that forms and be connected with side opening be installed in the acoustic conducting pipe on the measuring head, acoustic conducting pipe connects with first sound wave collection pin.
Described acoustic conducting pipe and said side opening are communicated with through the interface channel that measuring head is provided with, and have on this interface channel along the axially extended breeze way of measuring head.
Described second leads passage comprises the outer tube that is sleeved on outside the quick formula sensor of acoustic conducting pipe harmony; The outer tube lower end is an enclosuring structure by measuring head shutoff, its upper end; Sleeve pipe is provided with the balance air admission hole that the inlet of passage is led in the conduct second that is connected with said measuring head external environment of living in outside, has the transaudient passage that is communicated with the said balance air admission hole and the second sound wave collection tube pin in the said outer tube.
Described transaudient passage be the inwall by the outer wall of said acoustic conducting pipe and outer tube form along the axially extended interlayer of acoustic conducting pipe.
Described balance air admission hole is positioned at the rear side of outer tube and near the position of measuring head.
Be installed with flow deflector in the described measuring head, this flow deflector is positioned at eddy generator the place ahead.
The invention has the beneficial effects as follows: vortex shedding flow meter provided by the present invention is collected the pin collection by first sound wave in use with the quick formula sensor of sound and is flow through the formed acoustic signals of the whirlpool that produces behind the eddy generator by fluid; And collect the extraneous sound wave undesired signal in the external environment of living in of fluid passage by the second sound wave collection tube pin; And by first sonic sensor and two collected acoustic signals of sound waves collection pin of the corresponding reception of second sound wave sensor; The acoustic signals that receives of one of them sonic sensor is extraneous sound wave undesired signal like this; And the collected acoustic signals of another sonic sensor is the acoustic signals and the extraneous sound wave undesired signal of vortex arising; Because two extraneous sound wave undesired signal basically identicals that sonic sensor is collected; Like this after outputing to two received signals of sonic sensor in the comparator circuit; The signal that two sonic sensors are exported can balance be offset extraneous sound wave undesired signal, thereby effectively reduces the interference of fluid passage external environment of living in, the antijamming capability of the quick formula sensor of raising sound; Reduce the influence of external environment, the measuring accuracy of the quick formula sensor of raising sound to pick-up unit and vortex shedding flow meter.
Vortex shedding flow meter provided by the present invention in use; The air-flow that gets in the fluid passage can alternately produce two row whirlpool signals through behind the eddy generator; Become acoustic signals through first after leading channel transfer; It is collected that this acoustic signals is collected pin by first sound wave, and will collected acoustic signals send to first sonic sensor of correspondence, and this acoustic signals intensity is directly proportional with fluid velocity in the fluid passage; Intensity through the measurement of sound signal can calculate the flow velocity in the fluid passage, and then calculates flow.Consider that fluid passage and fluid passage external environment of living in is connected; First sound wave is collected pin and is led the sound wave undesired signal that exists in the collected acoustic signals of passage in the external environment through first; These sound wave undesired signals must be removed, measuring accuracy could be guaranteed.Also be provided with the second sound wave collection tube pin on the quick formula sensor of sound that vortex shedding flow meter provided by the present invention is provided with; This second sound wave collection tube pin is led the sound wave undesired signal in the passage collection fluid passage external environment of living in through being located at second on the measuring head; And the second sound wave collection tube pin is transferred to corresponding second sound wave sensor with collected sound wave undesired signal; The acoustic signals that receives of one of them sonic sensor is extraneous sound wave undesired signal like this; And the collected acoustic signals of another sonic sensor is the acoustic signals and the extraneous sound wave undesired signal of vortex arising; Because two extraneous sound wave undesired signal basically identicals that sonic sensor is collected, like this after outputing to two received signals of sonic sensor in the comparator circuit, the signal that two sonic sensors are exported can balance be offset extraneous sound wave undesired signal; Thereby effectively reduce the interference of fluid passage external environment of living in; The antijamming capability of the quick formula sensor of raising sound reduces the influence of external environment to pick-up unit and vortex shedding flow meter, the measuring accuracy of the quick formula sensor of raising sound.Vortex shedding flow meter provided by the present invention adopts the mode of sonic detection to measure rate of flow of fluid, has excellent water resistance, effectively reduces in the fluid contained steam to the influence of measurement result.
Description of drawings
Fig. 1 is the structural representation of vortex shedding flow meter provided by the present invention with a kind of embodiment of the quick formula sensor of sound;
Fig. 2 is to use the structural representation of a kind of embodiment of the vortex shedding flow meter of the quick formula sensor of sound as shown in Figure 1;
(arrow is depicted as fluid flow direction among the figure).
Embodiment
As shown in Figure 1; A kind of vortex shedding flow meter is with the embodiment of the quick formula sensor of sound; The quick formula sensor of sound among this embodiment comprises the housing 20 with inner chamber; The inner chamber of housing 20 is separated into two cavitys by first sonic sensor and the second sound wave sensor that are arranged in back-to-back in the inner chamber; First sonic sensor here is first electret microphone 21; Second sound wave sensor then is second electret microphone 22; On housing 20, be provided with two corresponding respectively connections of cavity and collect the pin 11 and the second sound wave collection tube pin 12 with first sound wave that collected acoustic signals is passed to corresponding electret microphone; First sound wave here collect pin 11 be used for vortex shedding flow meter on the fluid passage be connected and flow through the formed acoustic signals of the whirlpool that produces behind the eddy generator to collect fluid, the second sound wave collection tube pin 12 then is used for being connected to collect extraneous sound wave undesired signal with said fluid passage external environment of living in, first, second electret microphone of arranging is back-to-back then eliminated first sound wave through interacting with balance and is collected the sound wave undesired signal in the collected fluid passage of pin.
The signal output part of first, second sonic sensor in the foregoing description is connected with signal comparator circuit; Through this signal comparison comparator circuit two received signals of sonic sensor are done comparison, thereby balance of the influence of extraneous sound wave undesired signal measurement structure.Signal comparator circuit can adopt and adopt full-bridge circuit in the circuit.
First, second sonic sensor in the foregoing description is electret microphone; In other embodiments; First, second sonic sensor also can adopt other types such as moving-coil type, the little formula of silicon all can; As long as used sonic sensor sensitivity is enough high, and will the keeping consistency of used two sonic sensors, matching will be got well on same quick formula sensor of sound, in order to avoid the elimination undesired signal is caused adverse effect.
In the above-described embodiments; Two electret microphones are arranged in the housing inner chamber; And two sound waves collection pins are installed on the housing; Two sound waves are collected the collected sound wave of pin and are acted on the electret microphone behind two cavitys about through housing; Because two sound waves are collected the sound wave undesired signal basically identical of the collected external environment of pin, two electret microphones arranging so back-to-back will be cancelled out each other with the influence to the quick formula sensor measurement of sound precision of the sound wave undesired signal of elimination external environment.In other embodiments, also can save housing, and sound wave is collected pin and corresponding electret microphone connects.
Like Fig. 1, shown in Figure 2; A kind of embodiment of vortex shedding flow meter; Vortex shedding flow meter among this embodiment comprises that inside is provided with the measuring head 3 of the tubular of fluid passage, in measuring head 3, is installed with the eddy generator 1 of small end towards the rear, fluid passage, and the cross section of the eddy generator here is triangular in shape; In measuring head 3, also be installed with flow deflector 2, this flow deflector is positioned at the place ahead of eddy generator.Being provided with on measuring head that inlet is connected with the fluid passage first lead passage and inlet fluid passage external environment of living in be connected when working with vortex shedding flow meter second lead passage; First lead passage inlet be positioned at the vortex street that after fluid flows through eddy generator, forms and produce on the regional corresponding fluidic channel walls; Here first lead passage comprise be opened on the measuring head with flow through eddy generator at fluid after the vortex street that forms produce side opening 4 on the regional corresponding fluidic channel walls, be installed in the interface channel that is communicated with side opening and acoustic conducting pipe that is provided with on the measuring head and acoustic conducting pipe 7 that radially extend along measuring head and the measuring head; Have on this interface channel along the axially extended breeze way 5 of measuring head; Acoustic conducting pipe 7 away from an end of measuring head promptly first lead passage the exit connect sound quick formula sensor 8; The structure of the quick formula sensor 8 of this is as shown in Figure 1; Repeat no more at this; The end away from measuring head that first sound wave of the quick formula sensor of sound is collected pin 11 and acoustic conducting pipe 7 connects, and the second sound wave collection tube pin 12 is then led the connect sound wave undesired signal of when collecting vortex shedding flow meter and use fluid passage external environment of living in of passage with second.In the present embodiment second led passage and comprised the outer tube 6 that is sleeved on outside the quick formula sensor of acoustic conducting pipe harmony; The outer tube lower end is an enclosuring structure by measuring head shutoff, its upper end; Sleeve pipe 6 is provided with the balance air admission hole 10 that the inlet of passage is led in the conduct second that is connected with said measuring head external environment of living in outside; This balance air admission hole 10 is positioned at the rear side of outer tube and near the position of measuring head; Have the transaudient passage that is communicated with the said balance air admission hole and the second sound wave collection tube pin in the said outer tube 6, the transaudient passage here be the inwall by the outer wall of said acoustic conducting pipe 7 and outer tube 6 form along the axially extended interlayer 9 of acoustic conducting pipe.
In the present embodiment, the interface channel of acoustic conducting pipe 7, outer tube 6 and connection side opening and acoustic conducting pipe all is positioned at the rear of said side opening.
In the present embodiment, for ease of when measuring, measuring head being put into the fluid passage, outer tube and acoustic conducting pipe all radially extend along measuring head, and above-mentioned like this vortex shedding flow meter forms L shaped structure.
In the present embodiment, the influence that can effectively eliminate impurities in the fluid that flows through in the measurement passage along the axially extended breeze way 5 of measuring head is set on measuring head 3.
In the present embodiment; Side opening on the fluidic channel walls of measuring head is positioned at the position near eddy generator; In other embodiments; Side opening also can be opened in the position far away slightly apart from eddy generator, as long as the whirlpool that the position offered of side opening still has fluid after flowing through eddy generator, to produce, promptly if side opening still is positioned at and the corresponding fluidic channel walls of vortex street generation area that after fluid flows through eddy generator, produces on.
During work; The vortex shedding flow meter of L-shaped structure is inserted in the fluid line; Balance air admission hole 10 on measuring head 3 and the outer tube 6 all is arranged in fluid line, and the quick formula sensor 8 of sound then is positioned at outside the fluid line, and the air-flow that gets in the fluid line is listed as staggered whirlpool signal through can alternately producing two behind the eddy generator 1; These whirlpool signals form the vortex street generation area in the fluid passage; These whirlpool signals become acoustic signals after side opening 4, interface channel, acoustic conducting pipe 7 transmission, it is collected that these acoustic signals are collected pin 11 by first sound wave, simultaneously; Receive by first sound wave by first electret microphone 21 and to collect the collected acoustic signals of pin 11; Because the fluid velocity in the fluid passage of acoustic signals intensity and measuring head is directly proportional, the intensity through the measurement of sound signal can calculate the fluid velocity in the fluid line like this, and then calculates the flow of fluid.Consider that fluid passage and fluid passage external environment of living in is connected; First sound wave is collected pin 11 and is led the sound wave undesired signal that exists in the collected acoustic signals of passage in the external environment through first; These sound wave undesired signals must be removed, measuring accuracy could be guaranteed.Also be provided with on the quick formula sensor of sound of vortex shedding flow meter in the above-described embodiments and be specifically designed to the second sound wave collection tube pin 12 of collecting the sound wave undesired signal in the external environment of living in of fluid passage; The second sound wave collection tube pin 12 is through the sound wave undesired signal in transaudient passage, the balance air admission hole 10 collection fluid passages external environment of living in; And the second sound wave collection tube pin, 12 collected sound wave undesired signals are received by second electret microphone 22; Because first, second electret microphone is arranged back-to-back; And because the quick formula sensor of sound is arranged in outer tube 6; The gas homology to be measured of circulation in the gas of circulation and the measuring head 3 in the balance air admission hole 10; The acoustic signals that such sonic sensor receives is extraneous sound wave undesired signal, and the collected acoustic signals of another sonic sensor is the acoustic signals and the extraneous sound wave undesired signal of vortex arising, because two extraneous sound wave undesired signal basically identicals that sonic sensor is collected; Like this after outputing to two received signals of sonic sensor in the comparator circuit; The signal that two sonic sensors are exported can balance be offset extraneous sound wave undesired signal, and the antijamming capability of quick formula sensor of raising sound and vortex shedding flow meter improves the measuring accuracy of vortex shedding flow meter.
The signal output part of first, second sonic sensor in the foregoing description is connected with signal comparator circuit; Through this signal comparison comparator circuit two received signals of sonic sensor are done comparison, thereby balance of the influence of extraneous sound wave undesired signal measurement structure.Signal comparator circuit can adopt and adopt full-bridge circuit in the circuit.
First, second sonic sensor in the foregoing description is electret microphone; In other embodiments; First, second sonic sensor also can adopt other types such as moving-coil type, the little formula of silicon all can; As long as used sonic sensor sensitivity is enough high, and will the keeping consistency of used two sonic sensors, matching will be got well on same quick formula sensor of sound, in order to avoid the elimination undesired signal is caused adverse effect.
In the above-described embodiments; Two electret microphones are arranged in the housing inner chamber; And two sound waves collection pins are installed on the housing; Two sound waves are collected the collected sound wave of pin and are acted on the electret microphone behind two cavitys about through housing; Because two sound waves are collected the sound wave undesired signal basically identical of the collected external environment of pin, two electret microphones arranging so back-to-back will be cancelled out each other with the influence to the quick formula sensor measurement of sound precision of the sound wave undesired signal of elimination external environment.In other embodiments, also can save housing, and sound wave is collected pin and corresponding electret microphone connects.
The acoustic conducting pipe of the vortex shedding flow meter in the foregoing description is positioned at the measuring head top; And radially extend along measuring head; The steam that gets in the acoustic conducting pipe like this condensation will occur and flow back to the fluid passage along acoustic conducting pipe in uphill process; Thereby make this vortex shedding flow meter have the excellent waterproof ability, can be used for the bigger testing environment of steam.
In the above-described embodiments, first leads passage is made up of side opening, interface channel and acoustic conducting pipe, in other embodiments, also can save interface channel, and with acoustic conducting pipe directly and side opening connect.Perhaps directly perforate on measuring head, and fixedly insert in the hole acoustic conducting pipe is friction tight.
In the above-described embodiments; Second leads passage mainly is made up of balance air admission hole on the outer tube and transaudient passage; In other embodiments, second leads passage can be the mozzle that connects with the second sound wave collection tube pin, and this mozzle can be arcuate structure or other structures of bending.
In the above-described embodiments; Transaudient passage is the interlayer that the outer wall of outer wall and the outer tube of acoustic conducting pipe forms; In other embodiments; Transaudient passage also can for other structure as setting up along the axially extended voice channel of acoustic conducting pipe in the sleeve pipe outside, the lower end of this voice channel is communicated with the balance air admission hole, Nantong is wanted to come with the second sound wave collection tube pin in its upper end, such second sound wave collection tube pin receives only the acoustic signals that is transmitted by voice channel.
The cross section of the eddy generator in the foregoing description is a triangle, and in other embodiments, structures such as isosceles trapezoid also can be adopted in the cross section of eddy generator.
Claims (10)
1. a vortex shedding flow meter is with the quick formula sensor of sound; It is characterized in that: comprise be used for vortex shedding flow meter on the fluid passage be connected and collect pin (11) and be used for being connected collecting the second sound wave collection tube pin (12) of extraneous sound wave undesired signal with said fluid passage external environment of living in to collect first sound wave that fluid flows through the formed acoustic signals of whirlpool that produces behind the eddy generator, the quick formula sensor of said sound also comprises and is used for correspondingly respectively receiving two sound waves and collecting the collected acoustic signals of pin and arrange first, second sonic sensor of eliminating the sound wave undesired signal of the fluid passage that first sound wave collection pin collects with balance back-to-back.
2. vortex shedding flow meter according to claim 1 is with the quick formula sensor of sound, and it is characterized in that: described first, second sonic sensor is electret microphone.
3. vortex shedding flow meter; Establish the measuring head (3) of fluid passage in comprising; In measuring head, be installed with the eddy generator (1) of small end towards the rear, fluid passage; It is characterized in that: described measuring head be provided with that inlet is connected with the fluid passage first lead that passage and inlet be connected with fluid passage external environment of living in second lead passage; First lead passage inlet be positioned at the vortex street that after fluid flows through eddy generator, forms and produce on the regional corresponding fluidic channel walls; First lead passage outlet connect sound quick formula sensor (8); The quick formula sensor of this comprise with first lead passage outlet dock with collect first sound wave that fluid flows through the acoustic signals that the whirlpool that produces behind the eddy generator forms collect pin (11) and with second lead passage outlet dock collecting the second sound wave collection tube pin (12) of extraneous sound wave undesired signal, the quick formula sensor of said sound also comprises and correspondingly respectively receives two sound waves and collect the collected acoustic signals of pin and arrange first, second sonic sensor of eliminating the sound wave undesired signal in the fluid passage that first sound wave collection pin collects with balance back-to-back.
4. vortex shedding flow meter according to claim 3 is characterized in that: described first, second sonic sensor is electret microphone.
5. vortex shedding flow meter according to claim 3; It is characterized in that: described first lead passage comprise be opened on the measuring head with flow through eddy generator at fluid after and side opening (4) on the corresponding fluidic channel walls in vortex street zone that forms and be connected with side opening be installed in the acoustic conducting pipe (7) on the measuring head, acoustic conducting pipe connects with first sound wave collection pin.
6. vortex shedding flow meter according to claim 5 is characterized in that: described acoustic conducting pipe and said side opening are communicated with through the interface channel that measuring head is provided with, and have on this interface channel along the axially extended breeze way of measuring head (5).
7. according to claim 5 or 6 described vortex shedding flow meters; It is characterized in that: described second leads passage comprises the outer tube (6) that is sleeved on outside the quick formula sensor of acoustic conducting pipe harmony; The outer tube lower end is an enclosuring structure by measuring head shutoff, its upper end; Sleeve pipe is provided with the balance air admission hole (10) that the inlet of passage is led in the conduct second that is connected with said measuring head external environment of living in outside, has the transaudient passage that is communicated with the said balance air admission hole and the second sound wave collection tube pin in the said outer tube.
8. vortex shedding flow meter according to claim 7 is characterized in that: described transaudient passage for the inwall by the outer wall of said acoustic conducting pipe and outer tube form along the axially extended interlayer of acoustic conducting pipe (9).
9. vortex shedding flow meter according to claim 7 is characterized in that: described balance air admission hole is positioned at the rear side of outer tube and near the position of measuring head.
10. vortex shedding flow meter according to claim 7 is characterized in that: be installed with flow deflector (2) in the described measuring head, this flow deflector is positioned at eddy generator the place ahead.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210302313.3A CN102818596B (en) | 2012-08-23 | 2012-08-23 | Vortex shedding flowmeter and acoustic sensor thereof |
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| CN201210302313.3A CN102818596B (en) | 2012-08-23 | 2012-08-23 | Vortex shedding flowmeter and acoustic sensor thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102116649A (en) * | 2011-01-11 | 2011-07-06 | 上海科洋科技发展有限公司 | Ultrasonic vortex flow meter and installation method thereof |
| CN202092684U (en) * | 2011-05-05 | 2011-12-28 | 浙江迪元仪表有限公司 | Diaphragm capsule type double-probe vortex street flow meter |
| CN101819051B (en) * | 2010-04-27 | 2012-05-30 | 郑州光力科技股份有限公司 | Vortex street flowmeter probe and vortex street flowmeter using probe |
| US20120192657A1 (en) * | 2011-01-31 | 2012-08-02 | Krohne Messtechnik Gmbh | Vortex flowmeter |
| CN202734875U (en) * | 2012-08-23 | 2013-02-13 | 郑州光力科技股份有限公司 | Vortex shedding flowmeter and sound-sensitive sensor thereof |
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2012
- 2012-08-23 CN CN201210302313.3A patent/CN102818596B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819051B (en) * | 2010-04-27 | 2012-05-30 | 郑州光力科技股份有限公司 | Vortex street flowmeter probe and vortex street flowmeter using probe |
| CN102116649A (en) * | 2011-01-11 | 2011-07-06 | 上海科洋科技发展有限公司 | Ultrasonic vortex flow meter and installation method thereof |
| US20120192657A1 (en) * | 2011-01-31 | 2012-08-02 | Krohne Messtechnik Gmbh | Vortex flowmeter |
| CN202092684U (en) * | 2011-05-05 | 2011-12-28 | 浙江迪元仪表有限公司 | Diaphragm capsule type double-probe vortex street flow meter |
| CN202734875U (en) * | 2012-08-23 | 2013-02-13 | 郑州光力科技股份有限公司 | Vortex shedding flowmeter and sound-sensitive sensor thereof |
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Address after: 450001 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 10 Patentee after: Power Polytron Technologies Inc Address before: 450001 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 10 Patentee before: Zhengzhou GL Tech Company |