CN205679631U - A kind of current test the speed unit - Google Patents
A kind of current test the speed unit Download PDFInfo
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- CN205679631U CN205679631U CN201521033210.7U CN201521033210U CN205679631U CN 205679631 U CN205679631 U CN 205679631U CN 201521033210 U CN201521033210 U CN 201521033210U CN 205679631 U CN205679631 U CN 205679631U
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Abstract
This utility model belongs to flow rate of water flow field of measuring technique, discloses a kind of current and tests the speed unit.These current unit that tests the speed includes electromagnetic horn, polarizer, agitator, and polarizer is arranged between electromagnetic horn and agitator；Isolator it is provided with between agitator and polarizer；Polarizer comprises polarization cavity, and polarization cavity is cylindrical cavity, and polarization cavity is coaxially arranged with short-circuit piece regulation pipe in one end of isolator, and axially arranged in the other end of polarization cavity have polarization sheet；Being set to square near one end of isolator in the pipe of short-circuit piece regulation pipe, its other end is provided in round, and intermediate portion is set to have an area of continuous transition shape, and short-circuit piece regulation inner axial tube is provided with short-circuit piece；It is provided with lateral through hole on the sidewall of polarization cavity, in lateral through hole, is provided with waveguide cymoscope.Not by impacts such as silt content in water, floating thing, weathers when this current tachymeter is measured；And realize automatically measuring laborsaving saving time.
Description
Technical field
This utility model belongs to flow rate of water flow field of measuring technique, tests the speed unit particularly to a kind of current.
Background technology
At present, during medium and small flow velocity, use rotating plasma or cup-type current meter to measure flow rate of water flow, current meter be installed on measuring staff or
On fish lead, putting into certain depth of water position in water, the rotating speed of rotating plasma or rotation cup becomes certain relation with water velocity, certain by measuring
The revolution of rotating plasma in time interval or rotation cup can calculate the stream of current；But this flow measurement mode can only detect in rill
The water velocity of speed.Conventionally employed buoy method measurement flow rate during big flow velocity, stands two respectively at current upstream and downstream direction certain distance
Individual, the people of upstream inserts a buoy in water, starts timing, flows to buoy with current stop meter during the people position in downstream
Time, and the speed of current is calculated according to the distance of two people.This method i.e. consumes manpower, and certainty of measurement is low, the most often occurs measuring
Failed situation, if in evening or light bad in the case of, need to use mark buoy or on buoy light a fire, very
Trouble.
Utility model content
The purpose of this utility model is to provide a kind of current and tests the speed unit, not by current when this current tachymeter unit is measured
The impact such as silt content, floating thing, weather in speed, water；And it is time saving and energy saving to realize measurement automatically.
For reaching object above, this utility model is achieved by the following technical solutions.
Scheme one:
A kind of current test the speed unit, it is characterised in that: include the agitator for sending linear polarization signal, for line pole
Change signal and carry out the polarizer of circular polarisation, for circularly polarized signal being oriented the circular polarisation launched and receive water-reflected
The electromagnetic horn of signal, described agitator comprises resonator cavity, and described polarizer is arranged between electromagnetic horn and agitator；Described
The isolator of the circularly polarized signal reflected for isolation it is provided with between agitator and polarizer；
Described polarizer comprises polarization cavity, and described polarization cavity is cylindrical cavity, and described polarization cavity is near the one of isolator
Being coaxially arranged with short-circuit piece regulation pipe in end, axially arranged in the other end of described polarization cavity have polarization sheet；Described short-circuit piece is adjusted
Being set to square near one end of isolator in the pipe of pipe joint, its other end is provided in round, and intermediate portion is set to circumference
Continuous transition shape, described short-circuit piece regulation inner axial tube is provided with short-circuit piece；
It is provided with lateral through hole on the sidewall of described polarization cavity, is provided with in described lateral through hole and reflects for detection
The waveguide cymoscope of circularly polarized signal.
The feature of technique scheme and further improvement:
Further, described resonator cavity is outside equipped with fin.
Further, described polarization sheet is circular polarisation sheet, and described electromagnetic horn is conical-horn antenna.
Further, the horn mouth of described electromagnetic horn is internal is fixed with lens by trim ring.
Scheme two:
A kind of current tachymeter, tests the speed unit based on above-mentioned current, it is characterised in that: include for measuring transmitting circular polarisation
The obliquity sensor of signal and horizontal plane angle, for testing the speed unit according to launching circularly polarized signal and horizontal plane angle, current
The circularly polarized signal launched and the circularly polarized signal of reception are by being calculated the microprocessor of water velocity, for according to micro-place
The instruction of reason device carries out showing the display screen of water velocity and carrying out the alarm reported to the police；The outfan of described obliquity sensor and
Current test the speed unit waveguide cymoscope outfan correspondence electrical connection microprocessor two I O input, described display screen
I O input and the I of alarm O input corresponding electrical connection microprocessor two I O outfan.
The feature of technique scheme and further improvement:
Further, the test the speed outside of electromagnetic horn of unit of described current is provided with mounting flange, described mounting flange
The protected shell of upper connection, described microprocessor and obliquity sensor be arranged on protection shell in, described alarm and display screen
It is arranged on outside protection shell.
Further, the computational methods of described microprocessor are as follows, and current test the speed circularly polarized signal that unit receives
Frequency has certain skew relative to the frequency launching circularly polarized signal, and its direct relation formula is:
fd=| fa-fo|
In formula: fdFor Doppler frequency,
faFor receiving circularly polarized signal frequency,
foFor launching circularly polarized signal frequency；
Described Doppler frequency fdWith the relation of water velocity v it is:
fd=2 × v × cos Φ1×cosΦ2/λ
In formula: fdFor Doppler frequency,
V is water velocity,
Φ1For the angle of depression, launch the angle of circularly polarized signal and horizontal plane,
Φ2For deflection, launch circularly polarized signal and the water (flow) direction angle at horizontal plane,
λ is wavelength coefficients, λ=C/fo；Wherein foFor Microwave emission frequency, C be the aerial spread speed of electric wave 3 ×
108m/s。
Current of the present utility model test the speed unit and current tachymeter, use remote non-contact method to measure water surface stream
Speed, is not affected by silt content, floating thing, weather etc. in water velocity, water during measurement；It is applicable to general river, effluent flow rate etc.
Measure, be particularly suitable for carrying secretly sewage drainage, high flood and the flow-speed measurement in silt content urgency river.During use, be mountable to fish lead,
The moving objects such as box carry out kinetic measurement, it is possible to are installed on bridge, river course, channel etc. and carry out one-point measurement, and realize certainly
Dynamic measurement is laborsaving to save time.
Accompanying drawing explanation
Fig. 1 is that a kind of current of the present utility model test the speed the structural representation of unit；
Fig. 2 is the connecting structure for electrical equipment schematic diagram of a kind of current tachymeter of the present utility model；
Fig. 3 is the structural representation of a kind of current tachymeter of the present utility model；
In figure: 1, resonator cavity；2, isolator；3, fin；4, waveguide cymoscope；5, polarization cavity；6, short-circuit piece；7, polarization
Sheet；8, electromagnetic horn；9, lens；10, trim ring；11, short-circuit piece regulation pipe；12, mounting flange；13, protection shell；14, Wei Chu
Reason device；15, obliquity sensor；16, display screen；17, alarm.
Detailed description of the invention
With detailed description of the invention, this utility model is described in detail below in conjunction with the accompanying drawings.
With reference to Fig. 1, the structural representation of the unit that tests the speed for a kind of current of the present utility model；These current unit that tests the speed includes
For sending the agitator of linear polarization signal, for linear polarization signal being carried out the polarizer of circular polarisation, for circular polarisation is believed
Number being oriented the electromagnetic horn 8 of transmitting, the electromagnetic horn 8 in the present embodiment uses lens antenna, polarizer to be arranged on loudspeaker
Between antenna 8 and agitator；The isolation of the circularly polarized signal reflected for isolation it is provided with between agitator and polarizer
Device 2.
Agitator comprises resonator cavity 1, is provided with bulk-effect diode and short board in resonator cavity 1；Polarizer comprises polarization
Chamber 5, polarization cavity 5 is cylindrical cavity, and polarization cavity 5 is coaxially arranged with short-circuit piece regulation pipe 11, pole in one end of isolator 2
Axially arranged in changing the other end in chamber 5 have polarization sheet 7；It is set near one end of isolator 2 in the pipe of short-circuit piece regulation pipe 11
Square, its other end is provided in round, and intermediate portion is set to have an area of continuous transition shape, axially sets in short-circuit piece regulation pipe 11
It is equipped with short-circuit piece 6；It is provided with lateral through hole on the sidewall of polarization cavity 5, is provided with in lateral through hole and to reflect for detection
The waveguide cymoscope 4 of circularly polarized signal.When launching, linear polarization signal is converted into circularly polarized signal by polarizer, is receiving water
After the circularly polarized signal of face reflection, polarizer plays will be launched circularly polarized signal and receives the work that circularly polarized signal carries out being mixed
The effect of coupling is played during by, the circularly polarized signal after mixing by lateral through hole on the sidewall of polarization cavity 5.
Bulk-effect diode produces microwave signal after powering on after resonant, by regulating the position of bulk-effect diode
Putting and regulating the output frequency of agitator is 37.5GHz, for standard BJ320 interface；Acting as of isolator 2 is that agitator produces
Microwave signal one-way transmission to circular polarizer, and echo-signal is isolated out by isolator, will not impact agitator；Pole
The linear polarization signal that agitator is emitted by change device is changed into circularly polarized signal.Circularly polarized signal is radiated by electromagnetic horn 8
Going out, received by electromagnetic horn 8 after water-reflected, the circularly polarized signal that electromagnetic horn 8 receives is finally by waveguide detection
Device 4 receives, and circular polarizer input is standard BJ320 interface, is output as circular polarisation interface.
Resonator cavity 1 is outside equipped with fin 3.This agitator output is relatively big, can produce bigger heat, and fin is permissible
Heat is led away, causes damage with protective effect diode because temperature is too high.
Polarization sheet 7 is circular polarisation sheet, and electromagnetic horn 8 is conical-horn antenna.Polarization sheet 7 and electromagnetic horn 8 with the use of,
Using millimeter wave circular polarisation mode to measure water surface flow velocity, microwave wavelength uses millimeter wave, and Doppler frequency frequency displacement is big, echo-signal
By force.
The horn mouth of electromagnetic horn 8 is internal is fixed with lens 9 by trim ring 10, and lens 9 use polytetrafluoroethylmaterial material.
With reference to Fig. 2, for the connecting structure for electrical equipment schematic diagram of a kind of current tachymeter of the present utility model；This current tachymeter
Testing the speed unit based on above-mentioned current, this current tachymeter includes for measuring the inclination angle launching circularly polarized signal with horizontal plane angle
Sensor 15, for testing the speed the circularly polarized signal of unit transmitting and connecing according to launching circularly polarized signal and horizontal plane angle, current
The circularly polarized signal received is by being calculated the microprocessor 14 of water velocity, for showing according to the instruction of microprocessor 14
Show the display screen 16 of water velocity and carry out the alarm 17 reported to the police；The outfan of obliquity sensor 15 and current test the speed unit
Waveguide cymoscope 4 outfan correspondence electrical connection microprocessor 14 two I O input, the I of display screen 16 O input and
The I of alarm 17 O input correspondence electrical connection microprocessor 14 two I O outfan.
The structural representation of current tachymeter as shown in Figure 3；The test the speed outside of electromagnetic horn 8 of unit of current is provided with
Mounting flange 12, mounting flange 12 connects protected shell 13, microprocessor 14 and obliquity sensor 15 and is arranged on outside protection
In shell 13, alarm 17 and display screen 16 are arranged on outside protection shell 13.
Microprocessor 14 real-time storage measurement data, automatically generates the various measurement forms of printing and curve chart；And micro-
Other application apparatus can also be connected on processor 14, as connected communicator, can by short message mode by flow speed data certainly
Move and be sent on central site server.Solar panel can be used to power, to realize the automatic of field unattended mode
Test.
Current tachymeter utilizes Doppler effect principle, measures the novel measurement instrument of one of water surface flow velocity in a non contact fashion
Device.The millimeter-wave signal produced by 8mm agitator is via circular polarizer and electromagnetic horn 8, continual to water surface transmitting
A branch of microwave of 37.5GHz frequency, part electromagnetic wave energy is refracted in water, and sub-fraction energy is returned by water-reflected, quilt
Electromagnetic horn 8 receives and mixing portion in circular polarizer produces the Doppler frequency information corresponding with water flow velocity, in conjunction with inclining
Angle transducer 15 angle of depression information can calculate the speed of current.The computational methods of microprocessor 14 are as follows, and current test the speed unit
The frequency of the circularly polarized signal received has certain skew relative to the frequency launching circularly polarized signal, its direct relation formula
For: fd=| fa-fo|
In formula: fdDoppler frequency；
faIt is received back to wave frequency；
foTranmitting frequency.
Doppler frequency fdWith the relation of water velocity v it is:
fd=2 × v × cos Φ1×cosΦ2/λ
In formula: fdDoppler frequency,
V water velocity,
Φ1The angle of depression, launches the angle of circularly polarized signal and horizontal plane,
Φ2Deflection, launches circularly polarized signal and the water (flow) direction angle at horizontal plane,
λ--wavelength coefficients, λ=C/fo；Wherein foFor Microwave emission frequency, C be the aerial spread speed of electric wave (3 ×
108m/s)。
Automatically angle of depression Φ is measured by obliquity sensor1, deflection Φ2When installing this current tachymeter it has been determined that pass through
Software filtering analytical calculation in microprocessor goes out the flow velocity of water surface, is shown by display screen.
Remote non-contact method is used to measure water surface flow velocity, not by silt content in water velocity, water, floating during measurement
Thing, weather etc. affect；Being applicable to general river, effluent flow rate etc. is measured, and is particularly suitable for carrying secretly sewage drainage, and height is big vast and contains sand
The flow-speed measurement in the anxious river of amount.During use, it is mountable to the moving object such as fish lead, box and carries out kinetic measurement, it is possible to be installed on
Bridge, river course, channel etc. carry out one-point measurement, and realize automatically measuring laborsaving saving time.Flow-speed measurement precision is high, and flow velocity is tested
Precision is up to 0.1m/s.
Although embodiment of the present utility model being described above in association with accompanying drawing, but this utility model not office
Being limited to above-mentioned specific embodiments and applications field, above-mentioned specific embodiments is the most schematic, guiding, and
It not restrictive.Those of ordinary skill in the art is under the enlightenment of description, without departing from this utility model claim
In the case of the scope protected, it is also possible to make a variety of forms, these belong to the row of this utility model protection.
Claims (4)
1. current test the speed unit, it is characterised in that: include the agitator for sending linear polarization signal, for linear polarization
Signal carries out the polarizer of circular polarisation, for circularly polarized signal is oriented the circularly polarized signal launched and receive water-reflected
Electromagnetic horn (8), described polarizer is arranged between electromagnetic horn (8) and agitator；Between described agitator and polarizer
It is provided with the isolator (2) of the circularly polarized signal reflected for isolation；
Described polarizer comprises polarization cavity (5), and described polarization cavity (5) is cylindrical cavity, and described polarization cavity (5) is near isolator
(2) it is coaxially arranged with short-circuit piece regulation pipe (11) in one end, in the other end of described polarization cavity (5), is provided with polarization sheet (7)；
In the pipe of described short-circuit piece regulation pipe (11), the one end near isolator (2) is set to square, and its other end is provided in round, its
Mid portion is set to have an area of continuous transition shape, is provided with short-circuit piece (6) in described short-circuit piece regulation pipe (11)；Described polarization cavity
(5) it is provided with lateral through hole on sidewall, in described lateral through hole, is provided with the circularly polarized signal reflected for detection
Waveguide cymoscope (4).
2. current as claimed in claim 1 a kind of test the speed unit, it is characterised in that: resonator cavity (1) is outside equipped with fin
(3)。
3. current as claimed in claim 1 or 2 a kind of test the speed unit, it is characterised in that: described polarization sheet (7) is circular polarisation
Sheet, described electromagnetic horn (8) is conical-horn antenna.
4. current as claimed in claim 1 or 2 a kind of test the speed unit, it is characterised in that: the horn mouth of described electromagnetic horn (8)
The internal trim ring (10) that passes through is fixed with lens (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521033210.7U CN205679631U (en) | 2015-12-11 | 2015-12-11 | A kind of current test the speed unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521033210.7U CN205679631U (en) | 2015-12-11 | 2015-12-11 | A kind of current test the speed unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205679631U true CN205679631U (en) | 2016-11-09 |
Family
ID=57437716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521033210.7U Withdrawn - After Issue CN205679631U (en) | 2015-12-11 | 2015-12-11 | A kind of current test the speed unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205679631U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445488A (en) * | 2015-12-11 | 2016-03-30 | 西安恒达微波技术开发公司 | Water flow speed measuring unit and water flow speed measuring device adopting the same |
| CN110716064A (en) * | 2019-10-12 | 2020-01-21 | 中国科学院西安光学精密机械研究所 | Large depth-of-field optical antenna device applied to optical fiber Doppler velocimeter |
-
2015
- 2015-12-11 CN CN201521033210.7U patent/CN205679631U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445488A (en) * | 2015-12-11 | 2016-03-30 | 西安恒达微波技术开发公司 | Water flow speed measuring unit and water flow speed measuring device adopting the same |
| CN105445488B (en) * | 2015-12-11 | 2018-06-29 | 西安恒达微波技术开发有限公司 | A kind of flow tests the speed unit and to be tested the speed the flow tachymeter of unit using the flow |
| CN110716064A (en) * | 2019-10-12 | 2020-01-21 | 中国科学院西安光学精密机械研究所 | Large depth-of-field optical antenna device applied to optical fiber Doppler velocimeter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 710100 Changan District City, Xi'an Province, Xi'an City Aerospace base Feitian Road No. 485, No. Patentee after: XI'AN HENGDA MICROWAVE TECHNOLOGY DEVELOPMENT Co.,Ltd. Address before: 710100 Changan District City, Xi'an Province, Xi'an City Aerospace base Feitian Road No. 485, No. Patentee before: Xi'an Hengda microwave LLC Address after: 710100 Changan District City, Xi'an Province, Xi'an City Aerospace base Feitian Road No. 485, No. Patentee after: Xi'an Hengda microwave LLC Address before: 710100 Changan District City, Xi'an Province, Xi'an City Aerospace base Feitian Road No. 485, No. Patentee before: Xi'an Hengda Microwave Technology Development Co. |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161109 Effective date of abandoning: 20180629 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20161109 Effective date of abandoning: 20180629 |