CN104515552A - Vortex street flow meter - Google Patents
Vortex street flow meter Download PDFInfo
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- CN104515552A CN104515552A CN201310456415.5A CN201310456415A CN104515552A CN 104515552 A CN104515552 A CN 104515552A CN 201310456415 A CN201310456415 A CN 201310456415A CN 104515552 A CN104515552 A CN 104515552A
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- flow meter
- vortex street
- vortex
- measuring tube
- signal
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Abstract
The invention provides a vortex street flow meter. The vortex street flow meter comprises a meter head, a connection tube and a measurement tube; two ends of the measurement tube are connected into a measured pipe to be measured; the middle of the measurement tube is provided with a vortex generating body; the inner wall of the measurement tube is provided with a vortex street sensor; one end of the connection tube is connected with the measurement tube and the other end of the connection tube is connected with the meter head; a lead which is arranged at the rear end of the vortex street sensor penetrates the connection tube to be connected into the meter head; the meter head comprises a signal processing module and a liquid crystal display; the signal processing module is used for receiving electric signals output from the vortex street sensor, outputting digital signals to the liquid crystal display after signal processing, displaying a measurement result and emitting wireless signals. According to the vortex street flow meter, the wireless communication function is implemented and an upper computer can access measurement data of the flow meter in the network conveniently.
Description
Technical field
The present invention relates to fluid measurement instrument, the vortex shedding flow meter of pressure gas or saturated vapour in especially a kind of measuring channel.
Background technology
A bluff body laid in a fluid by vortex shedding flow meter, and fluid is alternately separated in shedder both sides, discharges two strings staggered vortex regularly, and the flowmeter that is directly proportional to flow of vortex shedding frequency within the specific limits.
Vortex shedding flow meter is according to the volumetric flow rate of toll bar (Karman) vortex street principle measurement gas, steam or liquid, the volumetric flow rate of mark condition or mass rate.When Karman vortex street cause fluid flows through bluff body, fluid is peeled off from bluff body both sides, forms eddy current alternately.This eddy current replaced, makes the spot speed of bluff body two side liquid different.Fluid velocity is different, and the instantaneous pressure that bluff body both sides are subject to is also different, therefore makes bluff body vibrate.Vibration frequency is directly proportional to fluid velocity, is inversely proportional to the frontal width of bluff body.The pass of Karman vortex street frequency and fluid velocity and bluff body (swirl generating body) width is: f=SrV/d wherein: f=Karman vortex street frequency Sr=Strouhal number (~ 0.2) V=fluid velocity d=bluff body heads on width.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of vortex shedding flow meter with wireless transmission function.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of vortex shedding flow meter, comprises gauge outfit, connecting pipe and measuring tube;
Described measuring tube two ends access tested pipeline, middle part is provided with an eddy generator, and is provided with a vortex street sensor on the inwall of this measuring tube;
Described connecting pipe one end connects measuring tube, and the other end connects gauge outfit, and the wire of described vortex street sensor rear end is through connecting pipe access gauge outfit;
Described gauge outfit comprises signal processing module and liquid crystal display, and signal processing module receives the electric signal that described vortex street sensor exports, to liquid crystal display output digit signals after signal transacting, and display measurement result, simultaneously wireless signal emission.
As preferably, described signal processing module comprises amplification treatment circuit, buffer circuit, single-chip microcomputer, pulse amplifying circuit and terminal node again; Described amplification treatment circuit connects vortex street sensor, and the electric signal exported by this vortex street sensor is input isolation circuit after amplifying, and buffer circuit output terminal exports the pulse signal proportional with flow; Described single-chip microcomputer is connected with this buffer circuit output terminal, according to the strong and weak computation and measurement result of this pulse signal, and by this result to show in digital signal form input liquid crystal display; Described buffer circuit output terminal connects pulse amplifying circuit again, and entry terminal node after being amplified by pulse signal, the pulse signal after amplification is launched after described terminal node loads communication protocol.
As preferably, flange connecting apparatus is also equipped with in described measuring tube two ends.
As preferably, described measuring tube diameter is identical with tested pipeline diameter.
As preferably, described connecting pipe and described measuring tube at right angle setting.
The advantage that the present invention has and good effect are: adopt technique scheme, utilize the flow of pressure gas or saturated vapor in Karman vortex street principle Measurement accuracy pipeline, simultaneously, this flowmeter can also wireless signal emission, there is communication function, also facilitate the measurement data that host computer accesses this flowmeter in a network.
Accompanying drawing explanation
Fig. 1 is vortex shedding flow meter structural representation;
Fig. 2 is vortex shedding flow meter functional block diagram;
Fig. 3 is signal wireless transfer function block diagram.
In figure: 1, gauge outfit 2, connecting pipe 3, measuring tube 4, routing node 5, GPRS wireless transport module 6, network 11, signal processing module 12, liquid crystal display 31, vortex street sensor 1a, amplification treatment circuit 1b, buffer circuit 1c, single-chip microcomputer 1d, pulse amplifying circuit 1e, terminal node again
Embodiment
The present invention is described in detail with reference to the accompanying drawings below.
As illustrated in fig. 1 and 2, the present invention includes gauge outfit 1, connecting pipe 2 and measuring tube 3;
Measuring tube 3 two ends access tested pipeline, middle part is provided with an eddy generator, and on the inwall of this measuring tube 3, be provided with a vortex street sensor 31;
Connecting pipe 2 one end connects measuring tube 3, and the other end connects gauge outfit 1, and the wire of vortex street sensor 31 rear end accesses gauge outfit 1 through connecting pipe 2;
Gauge outfit 1 comprises signal processing module 11 and liquid crystal display 12, and signal processing module 11 comprises amplification treatment circuit 1a, buffer circuit 1b, single-chip microcomputer 1c, pulse amplifying circuit 1d and terminal node 1e again; Amplification treatment circuit 1a connects vortex street sensor 31, and the electric signal exported by this vortex street sensor 31 is input isolation circuit 1b, buffer circuit 1b output terminal output pulse signal after amplifying; Single-chip microcomputer 1c is connected with this buffer circuit 1b output terminal, according to the strong and weak computation and measurement result of pulse signal, and by this result with display in digital signal form input liquid crystal display 12; Buffer circuit 1b output terminal connects pulse amplifying circuit 1d again, and entry terminal node 1e after being amplified by pulse signal, the pulse signal after amplification is launched after terminal node 1e loads communication protocol.
As shown in Figure 3, the work of multiple stage vortex shedding flow meter is had in one space, the wireless signal after loading communication protocol launched by every platform flowmeter, the routing node 4 that this wireless signal is arranged in its effective coverage receives, and packing is sent to GPRS wireless transport module 5, and then be uploaded to network 6, thus realize host computer accesses each vortex shedding flow meter measurement data object by network 6.
Above embodiments of the invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the scope of the invention change and improve, and all should still belong within this patent covering scope.
Claims (5)
1. a vortex shedding flow meter, is characterized in that: comprise gauge outfit (1), connecting pipe (2) and measuring tube (3);
Described measuring tube (3) two ends access tested pipeline, middle part is provided with an eddy generator, and on the inwall of this measuring tube, be provided with a vortex street sensor (31);
Described connecting pipe (2) one end connects measuring tube (3), and the other end connects gauge outfit (1), and the wire of described vortex street sensor (31) rear end is through connecting pipe (2) access gauge outfit (1);
Described gauge outfit (1) comprises signal processing module (11) and liquid crystal display (12), signal processing module (11) receives the electric signal that described vortex street sensor (31) exports, to liquid crystal display (12) output digit signals after signal transacting, display measurement result, simultaneously wireless signal emission.
2. vortex shedding flow meter according to claim 1, is characterized in that: described signal processing module (11) comprises amplification treatment circuit (1a), buffer circuit (1b), single-chip microcomputer (1c), pulse amplifying circuit (1d) and terminal node (1e) again; Described amplification treatment circuit (1a) connects vortex street sensor (31), the electric signal exported by this vortex street sensor (31) is input isolation circuit (1b) after amplifying, buffer circuit (1b) output terminal output pulse signal; Described single-chip microcomputer (1c) is connected with this buffer circuit (1b) output terminal, according to the strong and weak computation and measurement result of this pulse signal, and this result is inputted display in liquid crystal display (12) with digital signal form; Described buffer circuit (1b) output terminal connects pulse amplifying circuit again, and entry terminal node (1e) after being amplified by pulse signal, the pulse signal after amplification is launched after described terminal node loads communication protocol.
3. vortex shedding flow meter according to claim 1, is characterized in that: flange connecting apparatus is also equipped with in described measuring tube (3) two ends.
4. vortex shedding flow meter according to claim 1, is characterized in that: described measuring tube (3) diameter is identical with tested pipeline diameter.
5. vortex shedding flow meter according to claim 1, is characterized in that: described connecting pipe (2) and described measuring tube (3) at right angle setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310456415.5A CN104515552A (en) | 2013-09-27 | 2013-09-27 | Vortex street flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310456415.5A CN104515552A (en) | 2013-09-27 | 2013-09-27 | Vortex street flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104515552A true CN104515552A (en) | 2015-04-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310456415.5A Pending CN104515552A (en) | 2013-09-27 | 2013-09-27 | Vortex street flow meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104515552A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108061579A (en) * | 2017-11-21 | 2018-05-22 | 广州西森自动化控制设备有限公司 | A kind of vortex-shedding meter of LoRa agreements |
| TWI817415B (en) * | 2021-08-03 | 2023-10-01 | 日商歐佛股份有限公司 | signal processing device |
-
2013
- 2013-09-27 CN CN201310456415.5A patent/CN104515552A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108061579A (en) * | 2017-11-21 | 2018-05-22 | 广州西森自动化控制设备有限公司 | A kind of vortex-shedding meter of LoRa agreements |
| TWI817415B (en) * | 2021-08-03 | 2023-10-01 | 日商歐佛股份有限公司 | signal processing device |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150415 |
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| WD01 | Invention patent application deemed withdrawn after publication |