CN108061698A - The full-automatic experimental rig and its method of measurement fluctuation current infiltration towing force coefficient - Google Patents
The full-automatic experimental rig and its method of measurement fluctuation current infiltration towing force coefficient Download PDFInfo
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- CN108061698A CN108061698A CN201711303884.8A CN201711303884A CN108061698A CN 108061698 A CN108061698 A CN 108061698A CN 201711303884 A CN201711303884 A CN 201711303884A CN 108061698 A CN108061698 A CN 108061698A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
Abstract
The invention discloses the full-automatic experimental rigs and its method that a kind of measurement fluctuation current permeate towing force coefficient, are related to soil test technique.This experimental rig is：Test specimen tube module（10）Top, measurement module（20）, conduit（70）, water tank（40）, motor module（30）With test specimen tube module（10）Bottom be sequentially communicated to form a closed circuit；Test specimen tube module（10）, data collector（50）And terminal（60）It is sequentially connected, realizes to sample（16）Acquisition, storage and processing；Terminal（60）And motor module（30）Connection, is realized to motor module（30）Control.This experimental rig can long-time stable, it is accurate, efficiently automatic data collection and handle data, be fitted the result variation drawn and image conversion；And great lot of water resources can be saved；It is simple and easy to get, it can seek unity of standard, industrialize assembling or production.
Description
Technical field
The present invention relates to soil test techniques more particularly to a kind of infiltration of measurement fluctuation current to pull the full-automatic of force coefficient
Experimental rig and its method.
Background technology
Chinese patent application ZL201611042292.0《A kind of infiltration dress for studying the region-wide seepage flow mechanism of porous media
It puts》For studying the division of the seepage flow mechanism of porous media material and each the flow domain.But it is consumed in the invention experimentation
Take great lot of water resources, and need the measurement flow that manually constantly pours, there are error, and what flow took is in a period of time
Average value；There is no the temperature for measuring test specimen tube water outlet and water inlet in experimentation, the infiltration coefficient acquired does not carry out temperature
Degree correction；Pressure difference on the simply barrel that the invention measurement obtains between 2 points of pressure tap.
The content of the invention
The purpose of the present invention, which is that, overcomes shortcoming and defect existing in the prior art, provides a kind of measurement fluctuation current and oozes
The full-automatic experimental rig and its method of towing force coefficient thoroughly.
The object of the present invention is achieved like this：
, can be in Millisecond accurate flow control there is provided servomotor on the basis of ZL201611042292.0, it can
Wave flow is generated, recycling for water is realized in whole experiment process, saves resource and manpower, and whole process passes through pressure
Meter, thermometer and flowmeter gather measurement data in real time, and Data Post is convenient and efficient, realizes automation and the intelligence of experiment
Change；And it can gather in real time and store the data of its acquisition, both motor control software and motor module form a servo and return
Road strictly accurately controls servomotor, then controls suction pump, and to reach requirement of experiment, the poster processing soft is big for handling
The measured data of experiment of amount, fitting obtain the relation between result and parameter, can also drawing image.
Specifically：
First, the full-automatic experimental rig (abbreviation experimental rig) of measurement fluctuation current infiltration towing force coefficient
This experimental rig is by test specimen tube module, measurement module, motor module, water tank, data collector, terminal
It is formed with conduit；
Its position and connection relation are：
The top of test specimen tube module, measurement module, conduit, water tank, motor module and test specimen tube module bottom successively
Connection forms a closed circuit；
Test specimen tube module, data collector and terminal are sequentially connected, and realize acquisition, storage and place to sample
Reason；
Terminal is connected with motor module, realizes and motor module is controlled.
2nd, the full-automatic test method (abbreviation test method) of measurement fluctuation current infiltration towing force coefficient
This method comprises the following steps：
1. experimental rig is installed
Test specimen tube module 10, thermometer 22, flowmeter 21, water tank 40, suction pump 33 connect into one with conduit 70 successively
A circulatory system unscrews exhaust bolt 12-5, opens gas vent 12-4, supplies water to water storage babinet 41, after filling water tank, stop
It only supplies water, checks whether various pipelines connect；
2. sample 602 is installed
Test specimen tube upper cover 11 and test specimen tube main body 12 are separated, from top to bottom, are sequentially placed into chin spoiler 14-2, lower filter screen
15-2, sample 16, upper filter screen 15-1 and baffle upper plate 14-1；The layering of sample 16 loads, and reality is gently hit with wooden mallet, to control its hole
Gap ratio；After every layer installs, suction pump 33 is opened, water is made to enter test specimen tube 12-0 from 12 lower end water inlet of test specimen tube main body, makes examination
16 gradual saturation of sample；In side pressure hole, laminar flow conduit 17,17 one end of flow directed catheter insertion pressure tap 12- are buried in place concordant 12-2
2, when saturation, makes water there not to be laminar flow conduit 17, into laminar flow conduit 17, treats that the air of laminar flow conduit 17 is discharged from gas vent 12-4,
Exhaust bolt 12-5 is tightened at this time；After sample 16 is loaded into fixed dress sample height, upper filter screen 15-1 and upper water conservancy diversion are placed into above
Plate 14-1 finally covers test specimen tube upper cover 11, tightens bolt 18, and sample closes suction pump 33 after installation is complete；
3. air-discharging 603
Suction pump 33 is opened, slowly water is made to enter in the circulatory system, the air in system is drained into water storage babinet 41, by
Water tank gas vent 45 is discharged, while is supplied water by water tank inlet opening 43 to water storage babinet 41, treats water from water tank gas vent 45
When slowly escaping through, water tank exhaust bolt 46 is screwed on, water tank gas vent 45 is closed, turns off suction pump 33.
4. start to test and store data 604
Start to test, by 60 input instruction of terminal, by servomotor controller 32, in test according to finger
The water supply of order constantly adjustment suction pump 33 changes the flow velocity of water in sample 16, the measurement during this in measurement module 20
Data are collected in real time and store.
5. experiment post processing 605
Relation between result and parameter is obtained by terminal 60, including draw infiltration coefficient, sample void ratio,
Pull force coefficient, hydraulic gradient, infiltration coefficient and the relation of sample void ratio, the relation of infiltration coefficient and flow velocity, hydraulic gradient
Relation between flow velocity, and drawing image.
The present invention has following advantages and good effect：
1. using water circulation utilization system, great lot of water resources needed for experiment is saved；
2. the hydraulic pressure of entire pressure measurement pore cross section is measured using laminar flow conduit；
3. suction pump 33 is controlled using servomotor 31, make motor operation accurate and efficiently, accurately controls and passes through sample
16 flow velocity；
4. can whole real-time data collection, 60 in house software of terminal can realize data exchange and feedback；
5. using thermometer, pressure gauge, flowmeter, make experimental data acquisition more comprehensively, it is more intelligent, more accurate；
6. the poster processing soft greatly can handle work by refined data, and obtain testing required result and image；
7. entire experiment is intelligent and automates.
In short, this experimental rig can long-time stable, it is accurate, efficiently automatic data collection and handle data, be fitted
The result variation drawn and image conversion；And great lot of water resources can be saved；It is simple and easy to get, it can seek unity of standard, industrialize assembling
Or production.
Description of the drawings
Fig. 1 is the structure diagram of this experimental rig；
Fig. 2 is the structure diagram of test specimen tube module 10；
Fig. 3 is the structure diagram of deflector 14；
Fig. 4 is the structure diagram of laminar flow conduit 17；
Fig. 5 is the structure diagram of water tank 40；
Fig. 6 is the flow chart of this test method；
Fig. 7 is the work flow diagram of data post-processing software 63.
In figure：
10-test specimen tube module,
11-test specimen tube upper cover,
12-test specimen tube main body,
12-0-test specimen tube, 12-1-tempered glass form, 12-2-pressure tap,
12-3-perforation, 12-4-gas vent, 12-5-exhaust bolt,
13-test specimen tube lower bottom cover,
14-1,14-2-upper and lower deflector,
15-1,15-2-upper and lower strainer,
16-sample,
17-laminar flow conduit,
18-bolt,
19-1,19-2-upper and lower sealing ring；
20-measurement module；
21-flowmeter, 22-thermometer, 23-pressure gauge；
30-motor module,
31-servomotor, 32-servomotor controller, 33-suction pump；
40-water tank,
41-water storage babinet, 42-water tank apopore, 43-water tank inlet opening,
44-water tank connecting hole, 45-water tank gas vent, 46-water tank exhaust bolt；
50-data collector；
60-terminal；
70-conduit.
Specific embodiment
It is described in detail with reference to the accompanying drawings and examples
First, experimental rig
1st, it is overall
Such as Fig. 1, this experimental rig is adopted by test specimen tube module 10, measurement module 20, motor module 30, water tank 40, data
Storage 50, terminal 60 and conduit 70 form；
Its position and connection relation are：
Top, measurement module 20, conduit 70, water tank 40, motor module 30 and the test specimen tube module of test specimen tube module 10
10 bottom is sequentially communicated to form a closed circuit；
Test specimen tube module 10, data collector 50 and terminal 60 are sequentially connected, realize the acquisition to sample 16,
Storage and processing；
Terminal 60 and motor module 30 connect, and realize and motor module 30 is controlled.
2nd, funtion part
1) test specimen tube module 10
Such as Fig. 2, test specimen tube module 10 include test specimen tube upper cover 11, test specimen tube main body 12, test specimen tube lower bottom cover 13, on lead
Flowing plate 14-1, chin spoiler 14-2, upper filter screen 15-1, lower filter screen 15-2, sample 16, laminar flow conduit 17, bolt 18, upper sealing ring
19-1 and lower seal 19-2；
Its position and connection relation are：
By upper, middle and lower order, test specimen tube upper cover 11, upper sealing ring 19-1, test specimen tube main body 12, lower seal 19-2 and examination
Sample cylinder lower bottom cover 13 is in turn connected into an entirety by bolt 18；
In test specimen tube main body 12, from top to bottom, be disposed with baffle upper plate 14-1, upper filter screen 15-1, sample 16, under
Strainer 15-2 and chin spoiler 14-2；
Laminar flow conduit 17 is provided in sample 16.
(1) test specimen tube upper cover 11
Test specimen tube upper cover 11 is in infundibulate, and lower end is provided with flange and is evenly equipped with 4 perforation, with test specimen tube main body 12
Upper flange is adapted to.
(2) test specimen tube main body 12
Test specimen tube main body 12 includes test specimen tube 12-0, tempered glass form 12-1, side pressure hole 12-2, perforation 12-3, exhaust
Hole 12-4 and exhaust bolt 12-5；
Its position and connection relation are：
Flange above and below test specimen tube 12-0 is evenly equipped with 4 threaded perforation respectively；
3 side pressure hole 12-2 are provided in the one side of test specimen tube 12-0, the height of test coupon cylinder 12-0 bottoms is respectively
75mm、175mm、275mm；
In side pressure hole, the upper end of 12-2 is provided with gas vent 12-4 and its exhaust bolt 12-5；The internal diameter of gas vent 12-4
2mm is threaded, for the air-discharging during sample is filled；Exhaust bolt 12-5 is threaded, for tightening gas vent 12-4.
A, test specimen tube 12-0
Test specimen tube 12-0 is a kind of cylinder, height 350mm, internal diameter 95mm, is respectively arranged with flange up and down, respectively with examination
Sample cylinder upper cover 11 and test specimen tube lower bottom cover 13 are adapted to；
B, tempered glass form 12-1
Using tempered glass, surface is provided with scale, facilitates dress sample；
C, side pressure hole 12-2
The height of 6~8mm of diameter, test coupon cylinder 12-0 bottom is respectively 75mm, 175mm, 275mm；
D, perforate 12-3
4 threaded perforation are equipped in circular end face above and below test specimen tube 12-1 respectively；
E, gas vent 12-4
Pressure tap 12-2 upper ends are arranged on, internal diameter 2mm is threaded, for the air-discharging during sample is filled；
F, exhaust bolt 12-5
3 are set, is threaded, for tightening gas vent 12-4.
(3) test specimen tube lower bottom cover 13
Test specimen tube lower bottom cover 13 is in infundibulate, and upper end is provided with flange and is evenly equipped with 4 perforation, with test specimen tube main body 12
Lower flange is adapted to.
(4) upper and lower deflector 14-1,14-2
Such as Fig. 3, upper and lower deflector 14-1,14-2 are a kind of round plastic block of similar honeycomb briquette square hole pencil.
(5) upper and lower strainer 15-1,15-2
The function of upper and lower strainer 15-1,15-2 are overanxious samples 16, pass freely through water.
(6) sample 16
(7) laminar flow conduit 17
Such as Fig. 4, laminar flow conduit 17 is closed for a kind of one end, the metal circular tube of one end open, and circular hole is provided on pipe,
Water is made to enter in pipe, in one end insertion pressure tap 12-2 that laminar flow conduit 17 is open；
(8) bolt 18
Bolt 18 is provided with 8 sets, is made of screw and nut, for fixing test specimen tube upper cover 11,12 and of test specimen tube main body
Test specimen tube lower bottom cover 13.
(9) sealing ring 19-1, lower seal 19-2 on
Seal test specimen tube module 10.
2) measurement module 20
Such as Fig. 1, measurement module 20 includes flowmeter 21, thermometer 22 and pressure gauge 23；
Flowmeter 21 is located at 12 water outlet one side of test specimen tube main body, and 2 thermometers 22 are respectively positioned at test specimen tube module 10
Inlet and outlet, 3 pressure gauges 23 are concordant with corresponding 3 pressure tap 12-2 respectively.
(1) flowmeter 21：1 is set, positioned at 12 water outlet one side of test specimen tube main body, can measure in real time and flow through conduit 70
Water flow, and measurement data is reached into data collector 50；
(2) thermometer 22：2 are set, respectively positioned at 10 inlet and outlet of test specimen tube module, range is 0-50 DEG C；
(3) pressure gauge 23：3, concordant with corresponding pressure tap 12-2 respectively, range 0-100kPa are set, precision<1%,
A diameter of 10-30mm；Its function is that hydraulic pressure force signal is changed into electric signal, is then gathered by data collector 50.
3) motor module 30
Such as Fig. 1, motor module 30 includes servomotor 31, servomotor controller 32 and suction pump 33；
Motor control software 62, servomotor controller 32, servomotor 31, suction pump 33 and test specimen tube module 10 are successively
Connection.
(1) servomotor 31：Power 1-3kw, rotating speed turn for 1500-3000 per minute, and resolution ratio is 10,000,000, work(
Can be that voltage signal is converted into torque and rotating speed to drive suction pump 33；
(2) servomotor controller 32：Servomotor is controlled by three kinds of position, speed and torque modes, it is real
Existing high-precision transmission system positioning；
(3) suction pump 33：Lift 30m controls it to draw water from water tank by servomotor 31.
4) water tank 40
Such as Fig. 5, water tank 40 includes water storage babinet 41, water tank apopore 42, water tank inlet opening 43, water tank connection
Hole 44, water tank gas vent 45 and water tank exhaust bolt 46；
Water tank gas vent 45 and its water tank exhaust bolt 46 are provided with above water storage babinet 41, in water storage babinet
41 right side wall is provided with water tank inlet opening 43 and water tank connecting hole 44, and the left side wall of water storage babinet 41 is provided with storage
Water tank apopore 42.
(1) water storage babinet 41
For iron water tank, length × width × height=0.5m × 0.5m × 0.5m, to test water storage；
(2) water tank apopore 42
It is arranged on 41 left side upper position of water storage babinet；
(3) water tank apopore 43
41 right side upper position of water storage babinet is arranged on, connects running water pipe；
(4) water tank connecting hole 44
For connecting conduit 60；
(5) water tank gas vent 45 and water tank exhaust bolt 46
Water tank gas vent 45 is threaded, and the two is used to discharge the air in water tank 40.
5) data collector 50
Such as Fig. 1, the input terminal of data collector 50 is connected respectively with flowmeter 21, thermometer 22 and pressure gauge 2, data
The output terminal and terminal 60 of collector 50 connect.
6) terminal 60
Terminal 60 is embedded with data acquisition control software 61, motor control software 62 and data post-processing software
63；
(1) data acquisition control software 61
The CR6 collectors produced using Campbell companies, cooperation LoggerNet_4.4.2 acquisition controls software are used,
It can realize 50Hz, the effect of uninterrupted sampling.
(2) motor control software 62
Using the control software that MDME202G1C servomotors are mating.
Motor control software 62 and motor module 30 form servo loop, and the flow meter data of storage is used to judge whether
Reach the requirement set in motor control software 62, servomotor 31 is controlled by servomotor controller 32, then control is taken out
Water pump 33.
(3) data post-processing software 63
Such as Fig. 7, the workflow of data post-processing software 63 is：
A. -701 are started；
B. sample parameter A, h, m, ω -702 are manually entered；
C. on-load pressure meter, thermometer and flowmeter measurement data -703；
D. i, u, e, K are calculatedT、a、b、c-704；
E. -705 are terminated.
In formula：
A accumulates for sample section, and h is specimen height, and m is air-dried sample gross mass, and ω is to air-dry moisture content,
I is hydraulic slope, and u is flow velocity of the tn moment by sample water, and e is sample void ratio,
KTFor tnThe infiltration coefficient of sample during moment water temperature T DEG C, a, b, c are towing force coefficient；
(1)
For tnWhen engrave, middle pore pressure meter pressure difference in, push hole meter pressure difference average value,
ρωFor water density, g is acceleration of gravity, specimen heights of the L between two pressure tap centers,
(2)
For the timeFlowmeter measurement data in moment；
(3)
GsFor specific gravity of soil partical, ρdFor sample dry density, mdFor sample dry mass；
(4)
KTFor tnThe infiltration coefficient of sample during moment water temperature T DEG C, T tnMoment test specimen tube out temperature measures amount temperature
Average value,For the timeFlowmeter measurement data in moment, the specimen height between two pressure tap centers of L, H is average
Water-head, K20For normal temperature (20 DEG C) when sample infiltration coefficient, ηTFor T DEG C when water coefficient of dynamic viscosity, η20For 20 DEG C
The coefficient of dynamic viscosity of Shi Shui；
(5)
Calculate a, b, c
By drawing t at different momentsnI and u relational graph picture, to calculate towing force coefficient a, b, c.
7) conduit 70
Using plastic catheter, internal diameter 0.8cm.
3rd, working mechanism of the invention
Sample 16 is installed, in discharge system after air, by 60 input instruction of terminal, starts to test；It tested
Cheng Zhong by servomotor controller 32, controls servomotor 31, then controls suction pump 33, adjusts rotating speed, increase or subtract
Few water supply, to reach the flow velocity of instruction needs；Real-time collecting and flowmeter 21, thermometer 22 and pressure are stored during experiment
The measurement data of meter 23 is finally fitted the relation obtained between result and parameter using terminal 60, and draws correlation
Figure.
Claims (8)
1. a kind of full-automatic experimental rig of the infiltration towing force coefficient of measurement fluctuation current, it is characterised in that：
By test specimen tube module (10), measurement module (20), motor module (30), water tank (40), data collector (50), calculating
Machine terminal (60) and conduit (70) composition；
Its position and connection relation are：
Top, measurement module (20), conduit (70), water tank (40), motor module (30) and the sample of test specimen tube module (10)
The bottom of cylinder mould block (10) is sequentially communicated to form a closed circuit；
Test specimen tube module (10), data collector (50) and terminal (60) are sequentially connected, and realize and sample (16) is adopted
Collection, storage and processing；
Terminal (60) and motor module (30) connection, realize and motor module (30) are controlled.
2. by full-automatic experimental rig described in claim 1, it is characterised in that：
The test specimen tube module (10) include test specimen tube upper cover (11), test specimen tube main body (12), test specimen tube lower bottom cover (13), on
Deflector (14-1), chin spoiler (14-2), upper filter screen (15-1), lower filter screen (15-2), sample (16), laminar flow conduit (17),
Bolt (18), upper sealing ring (19-1) and lower seal (19-2)；
Its position and connection relation are：
By upper, middle and lower order, test specimen tube upper cover (11), upper sealing ring (19-1), test specimen tube main body (12), lower seal (19-2)
An entirety is in turn connected by bolt (18) with test specimen tube lower bottom cover (13)；
In test specimen tube main body (12), from top to bottom, baffle upper plate (14-1), upper filter screen (15-1), sample are disposed with
(16), lower filter screen (15-2) and chin spoiler (14-2)；
Laminar flow conduit (17) is provided in sample (16).
3. by full-automatic experimental rig described in claim 1, it is characterised in that：
The measurement module (20) includes flowmeter (21), thermometer (22) and pressure gauge (23)；
Flowmeter (21) is located at test specimen tube main body (12) water outlet one side, and 2 thermometers (22) are located at test specimen tube module respectively
(10) inlet and outlet, 3 pressure gauges (23) are concordant with corresponding 3 pressure taps (12-2) respectively.
4. by full-automatic experimental rig described in claim 1, it is characterised in that：
The motor module (30) includes servomotor (31), servomotor controller (32) and suction pump (33)；
Terminal (60), servomotor controller (32), servomotor (31), suction pump (33) and test specimen tube module (10)
It is sequentially connected.
5. by full-automatic experimental rig described in claim 1, it is characterised in that：
The water tank (40) includes water storage babinet (41), water tank apopore (42), water tank inlet opening (43), water tank
Connecting hole (44), water tank gas vent (45) and water tank exhaust bolt (46)；
Water storage babinet (41) the upper surface of is provided with water tank gas vent (45) and its water tank exhaust bolt (46), in water tank
The right side wall of body (41) is provided with water tank inlet opening (43) and water tank connecting hole (44), the left side wall in water storage babinet (41)
It is provided with water tank apopore (42).
6. by full-automatic experimental rig described in claim 1, it is characterised in that：
The input terminal of the data collector (50) is connected respectively with flowmeter (21), thermometer (22) and pressure gauge (23),
Output terminal and terminal (60) connection of data collector (50).
7. by the full-automatic experimental rig described in claim 1, it is characterised in that：
After the terminal (60) is embedded with data acquisition control software (61), motor control software (62) and data
Manage software (63)；
The workflow of data post-processing software (63) is：
A. start (701)；
B. sample parameter A, h, m, ω (702) are manually entered；
C. on-load pressure meter, thermometer and flowmeter measurement data (703)；
D. i, u, e, K are calculatedT、a、b、c(704)；
E. terminate (705).
8. the test method based on full-automatic experimental rig described in claim 1-7, it is characterised in that：
1. installation experimental rig-
Test specimen tube module (10), flowmeter (21), thermometer (22), water tank (40), suction pump (33) use conduit (70) successively
A circulatory system is connected into, unscrews exhaust bolt (46), opens gas vent (45), is supplied water to water storage babinet (41), it is basic to fill
After full water tank (41), stop supplying water, check whether various pipelines connect；
2. sample is installed
Sample cylinder body upper cover (11) and test specimen tube main body (12) are separated, are sequentially placed into deflector (14), strainer (15), sample
(16), sample layering loads, and reality is gently hit with wooden mallet, to control its void ratio；After every layer installs, suction pump (33) is opened, is made
Water enters cylinder from test specimen tube lower end water inlet, makes the gradual saturation of sample；Laminar flow is buried in side pressure hole (12-2) concordant place
Conduit (17), flow directed catheter (17) one end insertion pressure tap (12-2), when saturation, makes water there not to be laminar flow conduit (17), into pipe
It is interior, it treats that inner air tube gas vent (12-4) is discharged, tightens exhaust bolt (12-5) at this time；Sample is loaded into fixed dress sample height
Afterwards, strainer (15), deflector (14) are placed into above, finally covers test specimen tube upper cover (11), tighten bolt (18), sample
(16) after installation is complete, suction pump (33) is closed；
3. air-discharging
Suction pump (33) is opened, slowly water is made to enter in the circulatory system, the air in system is drained into water storage babinet (41), by
Gas vent (45) is discharged, while is supplied water by inlet opening (43) to water storage babinet (41), when water is slowly escaped through from gas vent (45),
Exhaust bolt (46) is screwed on, gas vent (45) is closed, turns off suction pump (32)；
4. start to test and store data
Start to test, in motor control software (62) input instruction, by servo loop, constantly be adjusted according to instruction in test
The water supply of suction pump, changes the flow velocity of water in sample, measurement data is collected in real time in measurement module (20) during this
And it stores；
5. experiment post processing
The relation obtained between result and parameter, and drawing image are fitted with data post-processing software (63).
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| CN109323961A (en) * | 2018-09-05 | 2019-02-12 | 哈尔滨工程大学 | A kind of experimental system measuring drag coefficient |
| CN109932368A (en) * | 2019-04-02 | 2019-06-25 | 北京林业大学 | A kind of measurement method of flexibility vegetation group towing force coefficient |
| CN109946205A (en) * | 2019-03-13 | 2019-06-28 | 西南石油大学 | A kind of test device and its method of bore meal particles sedimentation drag coefficient |
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