CN108362912A - Novel current meter calibrating installation and its calibration method - Google Patents
Novel current meter calibrating installation and its calibration method Download PDFInfo
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- CN108362912A CN108362912A CN201810367379.8A CN201810367379A CN108362912A CN 108362912 A CN108362912 A CN 108362912A CN 201810367379 A CN201810367379 A CN 201810367379A CN 108362912 A CN108362912 A CN 108362912A
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- turnover bracket
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- 238000009434 installation Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000007306 turnover Effects 0.000 claims abstract description 65
- 230000007246 mechanism Effects 0.000 claims abstract description 44
- 230000009471 action Effects 0.000 claims abstract description 8
- 230000035515 penetration Effects 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 6
- 230000009467 reduction Effects 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims 1
- 230000008450 motivation Effects 0.000 claims 1
- 238000005096 rolling process Methods 0.000 claims 1
- 230000006872 improvement Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000012795 verification Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 241000372132 Hydrometridae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
- G01P21/02—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers
- G01P21/025—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers for measuring speed of fluids; for measuring speed of bodies relative to fluids
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of novel current meter calibrating installation and its calibration methods comprising current meter mounting rod, vertical rack, slide, turnover bracket, auto-manual lift drive mechanism, turnover driving mechanism and changement；Auto-manual lift drive mechanism driving slide makees lifting action, and turnover driving mechanism driving turnover bracket makees rotary movement；Changement drives the rotation of current meter mounting rod；By the commutation of changement, current meter may be implemented can detect in the two-way process of calibrating vehicle, improve calibrating efficiency；It by auto-manual lift drive mechanism come the underwater penetration of coutroi velocity instrument, and is controlled with manually and automatically two ways, flexibility is high, meets different use demands；Turnover driving mechanism has self-locking function simultaneously, while facilitating staff to replace current meter, can also prevent turnover bracket from taking a turn for the worse phenomenon in overturning, be brought convenience to using, good operating stability, it is easy to accomplish, conducive to being widely popularized.
Description
Technical field
The present invention relates to water conservancy hydrologic survey technical field, more particularly to a kind of novel current meter calibrating installation and calibrating side
Method.
Background technology
China's water resources complex, in hydrographic information, flow rate of water flow is an important hydrographic message, so the standard of flow velocity
Really measurement is most important to the accuracy of hydrographic information, improves the performance indicator of flow velocity verification system, is to ensure current meter and water
Measure the important guarantee of measurement instrument service precision.Since the environment of hydrographic information is different, the service life of current meter is influenced, therefore is needed
Periodic verification and repair are carried out to current meter, redefine performance.The special current meter of the measurement generally use of flow velocity, current meter
The fields such as rivers,lakes and seas are widely used, water velocity is measured.
According to the requirement of the total technical conditions of hydrological instrument, the precision of current meter need to be examined and determine, i.e., be examined and determine with current meter
Current meter is determined in car test, it is ensured that the work of current meter can comply with the national standard requirements.So current meter is using preceding or is making
With (being typically 1 year) need to be according to national Ministry of Water Resources " SL/T150-95 after a certain period of time《Rotating element current meter in straight line flume
Calibration method》" various parameters of standard convection speed instrument evaluate again.The calibrating principle of current meter：In a rectangular sink
Both sides set up two straight tracks, and calibrating vehicle installation is in orbit, it is made to move back and forth.Current meter is fixed on calibrating vehicle simultaneously
It is placed in water, underwater penetration is 0.6m to 1.0m, and trunnion axis and the calibrating groove track parallel deviation of instrument are not more than 3 °.When measurement
The water injected in sink is stationary, when with a constant speed, (0.01 arrives 6.0m/ to calibrating vehicle on the track of sink both sides
Between s) move back and forth when, for current meter examine and determine vehicle be static, the water in sink is then flowed with speed.It is examining and determine
Under conditions of vehicle speed has determined, the revolution of current meter rotor and corresponding time under friction speed are recorded, calibrating is measured
The rate of rotation of current meter, current meter is converted into using a series of corresponding formula by the rate of rotation measured when vehicle drives current meter movement
Flow velocity be compared with known speed, according to comparing result obtain current meter detection when error, evaluation current meter work
When accuracy.
For traditional current-meter verification pulley when realizing lifting, overturning and commutation to current meter, the method for use is relatively simple.
The lifting of current meter and commutation can not achieve automation on traditional calibrating vehicle, it is necessary to by manpower by current meter bar from flow velocity
It is lifted down on instrument calibrating vehicle, replacement adjustment then is carried out to current meter, wastes a large amount of manpower, and detection efficiency is relatively low.Cause
This, it is to put the major issue for being badly in need of solving in face of us to improve the degree of automation of current meter calibrating and efficiency.
Invention content
Against the above deficiency, one of the object of the invention is, provide it is a kind of reasonable in design, it is easy to operate, effectively carry
The novel current meter calibrating installation of high working efficiency
The second purpose of the present invention is to provide a kind of calibration methods of novel current meter calibrating installation.
To achieve the above object, the technical solution provided is the present invention：
A kind of novel current meter calibrating installation comprising current meter mounting rod, vertical rack, slide, turnover bracket, hand are from one
Body lift drive mechanism, turnover driving mechanism and changement, the slide is movably arranged on by sliding rail on vertical rack, described
Auto-manual lift drive mechanism is arranged on vertical rack, and slide Relative vertical frame can be driven to make lifting action, the overturning
Driving mechanism is arranged on slide, and the turnover bracket is arranged on the output shaft of turnover driving mechanism, and is driven by the overturning
Rotary movement is made in the driving of mechanism；The current meter mounting rod is arranged by bearing assembly on turnover bracket, the reversing machine
Structure is arranged on turnover bracket, and current meter mounting rod can be driven to rotate.
A kind of calibration method of novel current meter calibrating installation comprising following steps：
(1) turnover driving mechanism is set, for driving turnover bracket to make rotary movement upward or downward；
(2) an auto-manual lift drive mechanism is set, the lifting action of turnover bracket is adjusted for manually or electrically；
(3) a current meter mounting rod is set, for installing current meter；
(4) current meter mounting rod is mounted on turnover bracket by bearing assembly, and turnover bracket can overturn at any time
And lifting action；
(5) changement is set on turnover bracket, is rotated for coutroi velocity instrument mounting rod so that current meter can be made
180 ° or -180 ° rotations；
(6) turnover bracket is driven to downwardly turn over by turnover driving mechanism so that the current meter on current meter mounting rod
It stretches into water；At this moment, by auto-manual lift drive mechanism come the underwater penetration of coutroi velocity instrument, then according to calibrating vehicle
Travel directions rotate to enable current meter to make 180 ° or -180 ° by the commutation of changement, to realize that current meter is being examined
Determining the two-way process of vehicle can detect, and then realize the purpose of calibrating.
As an improvement of the present invention, the auto-manual lift drive mechanism includes double extension shaft motor, handwheel, ball
Lead screw and nut compatible with the ball screw, the ball screw is arranged by bearing on the front of vertical rack, described
Double extension shaft motor is vertically set on the top of vertical rack, and the drive shaft lower end of the double extension shaft motor and the ball screw is upper
End is connected；The nut setting is adapted on slide, and with the ball screw, and the handwheel is arranged in double extension shaft motor
Drive shaft upper end.
As an improvement of the present invention, the turnover bracket includes upper crossbearer, connects bearing and two vertical frames, two vertical frames
Upper end is symmetrically connected to the both ends of crossbearer, and the connects bearing is disposed therein on the lower end position of a vertical frame.
As an improvement of the present invention, the turnover driving mechanism includes upset motor and worm type of reduction gearing, institute
It states worm type of reduction gearing to be fixed on slide, one end of the output shaft of the worm type of reduction gearing is fixed on the connects bearing
On, the other end of output shaft is fixed on the lower end position of another vertical frame.
As an improvement of the present invention, the bearing assembly includes upper bearing (metal) and lower bearing, and lower bearing setting is even
Connect on bearing, the upper bearing (metal) is arranged on upper crossbearer, and it is opposite with the lower bearing just, the lower part of the current meter mounting rod
Through setting on the upper bearing (metal) and lower bearing.
As an improvement of the present invention, the changement includes reversing motor, driving gear and transmission gear, the biography
Moving gear is arranged in the lower end of current meter mounting rod, and the reversing motor corresponds to the side position setting of current meter mounting rod even
It connects on bearing, the driving gear is arranged in the drive shaft of reversing motor, and is meshed with the transmission gear.
Beneficial effects of the present invention are：The solution of the present invention is ingenious in design, reasonable, can be with by the commutation of changement
It realizes that current meter can be detected in the two-way process of calibrating vehicle, improves calibrating efficiency；Pass through auto-manual elevator drive machine
Structure carrys out the underwater penetration of coutroi velocity instrument, and is controlled with manually and automatically two ways, and flexibility is high, meets different make
Use demand；Worm type of reduction gearing is equipped in turnover driving mechanism, since worm type of reduction gearing has self-locking function, convenient
While staff replaces current meter, it can also prevent turnover bracket from taking a turn for the worse phenomenon in overturning, be brought convenience to using,
Good operating stability, in addition compact overall structure, it is easy to accomplish, it is conducive to wide popularization and application.
Description of the drawings
Fig. 1 is the dimensional structure diagram of the present invention.
Fig. 2 is the decomposition texture schematic diagram of the present invention.
Fig. 3 is the decomposition texture schematic diagram of turnover bracket in the present invention.
Specific implementation mode
Embodiment：Referring to Fig. 1, Fig. 2 and Fig. 3, a kind of novel current meter calibrating installation provided in this embodiment comprising stream
Fast instrument mounting rod 1, vertical rack 2, slide 3, turnover bracket 4, auto-manual lift drive mechanism 5, turnover driving mechanism 6 and commutation
Mechanism 7, the slide 3 are movably arranged on by sliding rail 8 on vertical rack 2, specifically, two sliding rails 8 are symmetricly set on vertical rack 2
Face side, the back side of slide 3 is equipped with the sliding block that can be slided on the sliding rail 8, to realize that it is vertical that slide 3 is movably arranged on
Purpose on straight frame 2.
The auto-manual lift drive mechanism 5 is arranged on vertical rack 2, and 3 Relative vertical frame 2 of slide can be driven to rise
Drop acts, and the turnover driving mechanism 6 is arranged on slide 3, and the output in turnover driving mechanism 6 is arranged in the turnover bracket 4
On axis, and made rotary movement by the driving of the turnover driving mechanism 6；The current meter mounting rod 1 is arranged by bearing assembly
On turnover bracket 4, the changement 7 is arranged on turnover bracket 4, and current meter mounting rod 1 can be driven to rotate.
A kind of calibration method of novel current meter calibrating installation comprising following steps：
(1) turnover driving mechanism 6 is set, for driving turnover bracket 4 to make rotary movement upward or downward；
(2) an auto-manual lift drive mechanism 5 is set, it is dynamic to adjust the lifting of turnover bracket 4 for manually or electrically
Make；
(3) a current meter mounting rod 1 is set, for installing current meter；
(4) current meter mounting rod 1 is mounted on turnover bracket 4 by bearing assembly, and turnover bracket 4 can turned at any time
Turn and lifting action；
(5) changement 7 is set on turnover bracket 4, is rotated for coutroi velocity instrument mounting rod 1 so that current meter
It can make 180 ° or -180 ° rotations；
(6) turnover bracket 4 is driven to downwardly turn over by turnover driving mechanism 6 so that the flow velocity on current meter mounting rod 1
Instrument stretches into water；At this moment, by auto-manual lift drive mechanism 5 come the underwater penetration of coutroi velocity instrument, then according to calibrating
The travel directions of vehicle rotate to enable current meter to make 180 ° or -180 ° by the commutation of changement 7, to realize current meter
It can be detected in the two-way process of calibrating vehicle, and then realize the purpose of calibrating.
Referring to Fig. 2, the auto-manual lift drive mechanism 5 includes double extension shaft motor 51, handwheel 52,53 and of ball screw
Nut compatible with the ball screw 53, the ball screw 53 are arranged by bearing on the front of vertical rack 2, described double
Stretch the top that spindle motor 51 is vertically set on vertical rack 2 by hexagon socket head cap screw, and the drive shaft lower end of the double extension shaft motor 51
It is connected with the upper end of the ball screw 53；The nut setting is adapted on slide 3, and with the ball screw 53,
The handwheel 52 is arranged in the drive shaft upper end of double extension shaft motor 51, can also directly by turning handwheel 52 manually, to
Ball screw 53 is driven to rotate by the drive shaft of double extension shaft motor 51, same realize drives slide 3 to make lifting action, to
The underwater penetration of coutroi velocity instrument.It is controlled with manually and automatically two ways, flexibility is high, meets different use demands.
In other embodiments, the ball wire bar pair of ball screw 53 and nut formation can also be used to be replaced using rack gear
Generation.Rack gear includes rack and gear compatible with the rack, and rack is arranged on the front of vertical rack 2, described
Double extension shaft motor 51 is horizontally installed on the back side of slide 3, and gear is arranged in drive shaft one end of double extension shaft motor 51, and with it is described
Rack is meshed, and the handwheel 52 is arranged on the drive shaft other end of double extension shaft motor 51.
Referring to Fig. 3, the turnover bracket 4 includes upper crossbearer 41, connects bearing 42 and two vertical frames 43, the upper end of two vertical frames 43
The both ends of crossbearer 41 are symmetrically connected to, the connects bearing 42 is disposed therein on the lower end position of a vertical frame 43.
The turnover driving mechanism 6 includes upset motor 61 and worm type of reduction gearing 62, the worm type of reduction gearing
62 are fixed on slide 3, and one end of the output shaft of the worm type of reduction gearing 62 is fixed in the connects bearing 42, output shaft
The other end be fixed on the lower end position of another vertical frame 43.Since worm type of reduction gearing 62 has self-locking function, facilitating work
While making personnel and replace current meter, it can also prevent turnover bracket 4 from taking a turn for the worse phenomenon in overturning, be brought convenience to using,
Good operating stability.
The bearing assembly includes upper bearing (metal) 9 and lower bearing 10, connects bearing 42 close to worm type of reduction gearing 62 one
Side position is equipped with through-hole, which is arranged on through-hole；The upper bearing (metal) 9 is arranged by bearing fixed frame 11 in upper crossbearer
On 41, and relatively just with the lower bearing 10, the lower part of the current meter mounting rod 1, which is run through, to be arranged in the upper bearing (metal) 9 under
On bearing 10.
The changement 7 includes reversing motor 71, driving gear 72 and transmission gear 73, and the transmission gear 73 setting exists
The lower end of current meter mounting rod 1, the side position setting that connects bearing 42 corresponds to current meter mounting rod 1 are used for installing the commutation
The assembly recess 421 of motor 71, the reversing motor 71 are fixed on assembly recess 421, and the setting of driving gear 72 is being changed
It is meshed in the drive shaft of motor 71, and with the transmission gear 73.
When work, current meter is installed on current meter mounting rod 1, and 180 ° of rotations of current meter are to pass through reversing motor 71
Driving is completed, and spinning upside down for current meter is completed by the driving of upset motor 61, and the lifting of current meter is to pass through double extension shaft
The driving of motor 51 is completed.By accordingly controlling the positive and negative rotation of reversing motor 71, upset motor 61 and double extension shaft motor 51,
With 180 ° of rotations, overturning and the elevating movement of corresponding coutroi velocity instrument, the automatic calibration in current meter verification process is realized,
And labour is reduced, calibrating efficiency is improved.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is changed.Therefore, the invention is not limited in specific implementation modes disclosed and described above, to the present invention's
Some modifications and changes should also be as falling into the scope of the claims of the present invention.In addition, although being used in this specification
Some specific terms, these terms are merely for convenience of description, does not limit the present invention in any way.Such as the present invention
Described in above-described embodiment, using other devices and its calibration method obtained from same or similar structures and methods, exist
In the scope of the present invention.
Claims (10)
1. a kind of novel current meter calibrating installation, which is characterized in that it includes current meter mounting rod, vertical rack, slide, overturning branch
Frame, auto-manual lift drive mechanism, turnover driving mechanism and changement, the slide are movably arranged on vertically by sliding rail
On frame, the auto-manual lift drive mechanism is arranged on vertical rack, and slide Relative vertical frame can be driven to make lifting action,
The turnover driving mechanism is arranged on slide, and the turnover bracket is arranged on the output shaft of turnover driving mechanism, and by this
Rotary movement is made in the driving of turnover driving mechanism；The current meter mounting rod is arranged by bearing assembly on turnover bracket, institute
It states changement to be arranged on turnover bracket, and current meter mounting rod can be driven to rotate.
2. novel current meter calibrating installation according to claim 1, which is characterized in that the auto-manual elevator drive machine
Structure includes that double extension shaft motor, handwheel, ball screw and nut compatible with the ball screw, the ball screw pass through bearing
It is arranged on the front of vertical rack, the double extension shaft motor is vertically set on the top of vertical rack, and the drive of the double extension shaft motor
Moving axis lower end is connected with the upper end of the ball screw；The nut setting is mutually fitted on slide, and with the ball screw
Match, the handwheel is arranged in the drive shaft upper end of double extension shaft motor.
3. novel current meter calibrating installation according to claim 1, which is characterized in that the turnover bracket includes upper cross
The upper end of frame, connects bearing and two vertical frames, two vertical frames is symmetrically connected to the both ends of crossbearer, and the connects bearing is disposed therein
On the lower end position of one vertical frame.
4. novel current meter calibrating installation according to claim 3, which is characterized in that the turnover driving mechanism includes turning over
Rotating motor and worm type of reduction gearing, the worm type of reduction gearing are fixed on slide, the output of the worm type of reduction gearing
One end of axis is fixed in the connects bearing, and the other end of output shaft is fixed on the lower end position of another vertical frame.
5. novel current meter calibrating installation according to claim 3, which is characterized in that the bearing assembly includes upper bearing (metal)
And lower bearing, the lower bearing are arranged in connects bearing, the upper bearing (metal) is arranged on upper crossbearer, and opposite with the lower bearing
Just, the lower part of the current meter mounting rod, which is run through, is arranged on the upper bearing (metal) and lower bearing.
6. novel current meter calibrating installation according to claim 3, which is characterized in that the changement includes commutation electricity
Machine, driving gear and transmission gear, the transmission gear are arranged in the lower end of current meter mounting rod, and the reversing motor corresponds to flow velocity
One side position of instrument mounting rod is arranged in connects bearing, and the driving gear is arranged in the drive shaft of reversing motor, and with
The transmission gear is meshed.
7. a kind of calibration method of novel current meter calibrating installation, which is characterized in that it includes the following steps：
(1) turnover driving mechanism is set, for driving turnover bracket to make rotary movement upward or downward；
(2) an auto-manual lift drive mechanism is set, the lifting action of turnover bracket is adjusted for manually or electrically；
(3) a current meter mounting rod is set, for installing current meter；
(4) current meter mounting rod is mounted on turnover bracket by bearing assembly, and turnover bracket can overturns and rise at any time
Drop acts；
(5) changement is set on turnover bracket, is rotated for coutroi velocity instrument mounting rod so that current meter can make 180 °
Or -180 ° of rotations；
(6) turnover bracket is driven to downwardly turn over by turnover driving mechanism so that the current meter on current meter mounting rod stretches into
In water；At this moment, by auto-manual lift drive mechanism come the underwater penetration of coutroi velocity instrument, then according to the round-trip of calibrating vehicle
Direction rotates to enable current meter to make 180 ° or -180 ° by the commutation of changement, to realize current meter in calibrating vehicle
Two-way process can detect, and then realize calibrating purpose.
8. the calibration method of novel current meter calibrating installation according to claim 7, which is characterized in that the auto-manual
Lift drive mechanism includes double extension shaft motor, handwheel, ball screw and nut compatible with the ball screw, the ball wire
Bar is arranged by bearing on the front of vertical rack, and the double extension shaft motor is vertically set on the top of vertical rack, and this pair stretches
The drive shaft lower end of spindle motor is connected with the upper end of the ball screw；The nut is arranged on slide, and with the rolling
Ballscrew is adapted, and the handwheel is arranged in the drive shaft upper end of double extension shaft motor.
9. the calibration method of novel current meter calibrating installation according to claim 8, which is characterized in that the turnover bracket
Including upper crossbearer, connects bearing and two vertical frames, the upper end of two vertical frames is symmetrically connected to the both ends of crossbearer, and the connects bearing is set
It sets on the lower end position of a vertical frame wherein.
10. the calibration method of novel current meter calibrating installation according to claim 9, which is characterized in that the overturning is driven
Motivation structure includes upset motor and worm type of reduction gearing, and the worm type of reduction gearing is fixed on slide, the worm and gear
One end of the output shaft of retarder is fixed in the connects bearing, and the other end of output shaft is fixed on the lower end position of another vertical frame
It sets；The bearing assembly includes upper bearing (metal) and lower bearing, which is arranged in connects bearing, and the upper bearing (metal) is arranged upper
On crossbearer, and it is opposite with the lower bearing just, the lower part of the current meter mounting rod is through being arranged in the upper bearing (metal) and lower axle
It holds；The changement includes reversing motor, driving gear and transmission gear, which is arranged in current meter mounting rod
Lower end, the reversing motor correspond to current meter mounting rod a side position be arranged in connects bearing, the driving gear is set
It sets in the drive shaft of reversing motor, and is meshed with the transmission gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810367379.8A CN108362912B (en) | 2018-04-23 | 2018-04-23 | Flow velocity meter calibrating device and calibrating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810367379.8A CN108362912B (en) | 2018-04-23 | 2018-04-23 | Flow velocity meter calibrating device and calibrating method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108362912A true CN108362912A (en) | 2018-08-03 |
| CN108362912B CN108362912B (en) | 2024-04-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810367379.8A Active CN108362912B (en) | 2018-04-23 | 2018-04-23 | Flow velocity meter calibrating device and calibrating method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108362912B (en) |
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| CN114460330A (en) * | 2021-11-23 | 2022-05-10 | 山东省水文中心 | Velocity meter verification equipment |
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|---|---|---|---|---|
| CN111059416A (en) * | 2019-11-27 | 2020-04-24 | 潍坊市水文局(潍坊市水土保持监测站) | Unconventional instrument carrying system of flow velocity calibrating device |
| CN114460330A (en) * | 2021-11-23 | 2022-05-10 | 山东省水文中心 | Velocity meter verification equipment |
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| CN108362912B (en) | 2024-04-02 |
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