CN203148478U - Novel flowmeter - Google Patents
Novel flowmeter Download PDFInfo
- Publication number
- CN203148478U CN203148478U CN 201220660359 CN201220660359U CN203148478U CN 203148478 U CN203148478 U CN 203148478U CN 201220660359 CN201220660359 CN 201220660359 CN 201220660359 U CN201220660359 U CN 201220660359U CN 203148478 U CN203148478 U CN 203148478U
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- China
- Prior art keywords
- ultrasonic transducer
- output
- direct digital
- digital frequency
- mcu
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- 239000012530 fluid Substances 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Abstract
A novel flowmeter comprises an ultrasonic transducer I and an ultrasonic transducer II which are obliquely and oppositely arranged in the flow direction of fluid, wherein the ultrasonic transducer I and the ultrasonic transducer II are connected with an MCU (micro controller unit); the MCU controls transmitting and receiving of ultrasonic signals; the ultrasonic transducer I is connected with a direct digital frequency synthesizer I, the ultrasonic transducer II is connected with a direct digital frequency synthesizer II, and output of the direct digital frequency synthesizer I and the direct digital frequency synthesizer II is accessed to a multiplier; output of the multiplier is accessed to a filter; output of the filter is accessed to an A/D converter; and output of the A/D converter is accessed to the MCU. According to the utility model, difference of signal time between the two ultrasonic transducers can be measured indirectly, the measuring result is accurate, and the measurement resolution is improved.
Description
Technical field
The utility model relates to fluid flow and detects, particularly a kind of new flowmeter.
Background technology
Ultrasonic flow meter is used for the non-contact detection of convection cell, its measuring accuracy height, and long service life has good effect to bigbore tube fluid detection.But, since during to relate to the measurement of propagation time difference, and should the mistiming a very small value often, mostly present ultrasonic flow meter is it is directly measured, and needs a lot of accurate devices couplings, cost is very high, is difficult to promote the use of.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of new flowmeter, has characteristics easy to use simple in structure.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of new flowmeter, be included in the oblique ultrasonic transducer that is oppositely arranged of longshore current direction of flow and ultrasonic transducer two, ultrasonic transducer one and ultrasonic transducer two all meet MCU, by this MCU control emission and received ultrasonic signal, described ultrasonic transducer one connects Direct Digital Frequency Synthesizers one, ultrasonic transducer two connects Direct Digital Frequency Synthesizers two, Direct Digital Frequency Synthesizers one connects multiplier with the output of Direct Digital Frequency Synthesizers two, the output of multiplier connects wave filter, the output of wave filter connects A/D converter, and the output of A/D converter is linked into described MCU.
Compared with prior art, it is poor that the utility model can measure two signal times between the ultrasonic transducer by indirect mode, and measurement result is accurate, has improved Measurement Resolution.
Description of drawings
Accompanying drawing is structural representation of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is carried out more detailed explanation.
As shown in the figure, the utility model is a kind of new flowmeter, be included in the oblique ultrasonic transducer that is oppositely arranged of longshore current direction of flow and ultrasonic transducer two, ultrasonic transducer one and ultrasonic transducer two all meet MCU, by this MCU control emission and received ultrasonic signal, described ultrasonic transducer one connects Direct Digital Frequency Synthesizers one, ultrasonic transducer two connects Direct Digital Frequency Synthesizers two, Direct Digital Frequency Synthesizers one connects multiplier with the output of Direct Digital Frequency Synthesizers two, the output of multiplier connects wave filter, the output of wave filter connects A/D converter, and the output of A/D converter is linked into described MCU.
Principle of work of the present utility model is:
Suppose that ultrasonic transducer one is positioned at flow direction top, ultrasonic transducer two is positioned at and flows to the below.At first, MCU sends signal controlling ultrasonic transducer one and ultrasonic transducer two work, ultrasonic transducer one sends ultrasonic signal A, this signal is received by ultrasonic transducer two, ultrasonic transducer two sends ultrasonic signal B, this signal is received by ultrasonic transducer one, signal A triggers Direct Digital Frequency Synthesizers two, produces cycle adjustable signal A1, and signal B triggers Direct Digital Frequency Synthesizers one, generation cycle adjustable signal B1, signal A1 and signal B1 multiply each other in multiplier, and product signal is by the AD conversion, by MCU control sampling, obtain time to peak, calculate rate of flow of fluid.
Claims (1)
1. new flowmeter, be included in the oblique ultrasonic transducer that is oppositely arranged of longshore current direction of flow and ultrasonic transducer two, ultrasonic transducer one and ultrasonic transducer two all meet MCU, by this MCU control emission and received ultrasonic signal, it is characterized in that, described ultrasonic transducer one connects Direct Digital Frequency Synthesizers one, ultrasonic transducer two connects Direct Digital Frequency Synthesizers two, Direct Digital Frequency Synthesizers one connects multiplier with the output of Direct Digital Frequency Synthesizers two, the output of multiplier connects wave filter, the output of wave filter connects A/D converter, and the output of A/D converter is linked into described MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220660359 CN203148478U (en) | 2012-11-30 | 2012-11-30 | Novel flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220660359 CN203148478U (en) | 2012-11-30 | 2012-11-30 | Novel flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203148478U true CN203148478U (en) | 2013-08-21 |
Family
ID=48975995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220660359 Expired - Fee Related CN203148478U (en) | 2012-11-30 | 2012-11-30 | Novel flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203148478U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106620957A (en) * | 2016-12-14 | 2017-05-10 | 中山嘉合医疗科技有限公司 | A liquid flow rate detection system and detection method for an infusion tube |
-
2012
- 2012-11-30 CN CN 201220660359 patent/CN203148478U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106620957A (en) * | 2016-12-14 | 2017-05-10 | 中山嘉合医疗科技有限公司 | A liquid flow rate detection system and detection method for an infusion tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130821 Termination date: 20131130 |