CN103226910A - Device for automatically discharging imnoising agent of acoustic doppler velocimetry and use method thereof - Google Patents
Device for automatically discharging imnoising agent of acoustic doppler velocimetry and use method thereof Download PDFInfo
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- CN103226910A CN103226910A CN2013101123841A CN201310112384A CN103226910A CN 103226910 A CN103226910 A CN 103226910A CN 2013101123841 A CN2013101123841 A CN 2013101123841A CN 201310112384 A CN201310112384 A CN 201310112384A CN 103226910 A CN103226910 A CN 103226910A
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Abstract
A device for automatically discharging an imnoising agent of acoustic doppler velocimetry (ADV) comprises a control unit, a feeding unit, a lofting unit, an experimental tank and the ADV. The use method of the device comprises the following steps of: firstly, preparing diatomite powder as a raw material of the imnoising agent; secondly, placing the powder into a funnel, conveying the powder to an agitating vessel through a kit connected with the funnel and mixing the powder with water in the vessel to form a diatomite suspension; thirdly, opening a lofting pipe valve to enable the diatomite suspension in the agitation vessel to enter the experimental tank through a lofting pipe; and finally, turning on the ADV for carrying out flow velocity measurement experiment. According to the device and the use method thereof disclosed by the invention, the diatomite with low price replaces expensive ADV-seeding and lime powder damaging an ADV probe as the imnoising agent, so that the cost is low; and a discharging device is simple in structure and can be used for automatically and uniformly discharging the imnoising agent of the ADV, so that the actual demand of physical experiment models can be met.
Description
Technical field
The present invention relates to a kind of automatic dispensing laboratory adds the agent of making an uproar with acoustic Doppler current meter (ADV) method and device thereof, it is mainly used in and continues the evenly specific particulate suspension of dispensing, increase the turbidity of tested water body, to guarantee that acoustic Doppler current meter (ADV) has higher signal to noise ratio (S/N ratio) all the time under continual measuring condition, thereby obtain flow speed data accurately and effectively, reduce the discontinuous and inhomogeneous signal to noise ratio (S/N ratio) instability that causes of discharging, and select for use and add the human damage that the agent of making an uproar causes the flow velocity instrument probe improperly because of manually.
Background technology
In the fluid mechanics field, acoustic Doppler current meter (ADV) is used to measure fluid velocity, can realize single-point three-dimensional flow transient measurement, have and disturb little detected fluid, therefore the remarkable advantage that waits easy and simple to handle, has obtained widespread use in breadboard physical model experiment.Acoustic Doppler current meter (ADV) principle is: the utilization Doppler's principle, and by probe emission ultrasound wave, run into the control volume back reflection, and accept the signal of reflection, the difference on the frequency of signal has been represented corresponding current particle velocity.
But the measuring principle of acoustic Doppler current meter (ADV) has determined the signal intensity of acoustic Doppler current meter (ADV) depends on whether there are enough media in the water, as silt, particulate etc., come the reflective sound wave signal.If particle is very few in the water, the signal that returns will be also littler than noise on every side, if there is not enough big signal intensity, acoustic Doppler current meter (ADV) can not accurately be measured, and the data of gained are sure and actual difference is very big.For preventing noise jamming, must guarantee certain signal noise ratio level during acoustic Doppler current meter (ADV) experiment, such as, measure (with the 25Hz sampling) for instantaneous velocity, signal to noise ratio (S/N ratio) generally requires above 15 decibels; Measure (with the 0.5Hz sampling) for mean flow rate, acoustic Doppler current meter (ADV) can be when signal to noise ratio (S/N ratio) be 5 decibels operate as normal.Therefore,, must in limpid relatively tested water body, drop into the suspended particulates of some, artificially increase the turbidity of tested water body for guaranteeing satisfactory signal to noise ratio (snr).There is supporting plastic grain suspension (ADV-Seeding) available though can be used for the agent of making an uproar that adds of acoustic Doppler current meter (ADV), but because of its price too expensive, only be adapted at doing in a small amount of water body the ADV calibration experiment, and excessive with respect to a large amount of water body costs of demand in the physical model experiment, can't realize.What extensively adopt at present is the method that the artificial powder that limes in tested water body increases turbidity, but pulverized limestone can cause corrosion to the ADV probe, and manually throw in discontinuous, can not guarantee that tested current water continues to have the turbidity that meets the demands, therefore neither preferred plan, must design new respond well and ADV that be easy to realize and add method for de-noising.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, provide a kind of automatic dispensing acoustic Doppler current meter (ADV) to add the device and the using method of the agent of making an uproar.
The present invention seeks to realize by following technical scheme:
A kind of automatic dispensing acoustic Doppler current meter (ADV) adds the device of the agent of making an uproar, it is characterized in that: this device is by control module, feeding unit, setting-out unit, experimental trough and acoustic Doppler current meter (ADV) constitute, and wherein said control module is made up of computing machine 1 and Programmable Logic Controller 2; Feeding unit is by funnel 3, sample-sending groove 4, electromagnet 5, kit 6, overhead gage 7, tension spring 8 and discharging opening 9 are formed, the bottom of funnel 3 connects by the charging aperture and the kit 6 of sample-sending groove 4, and inboard one end of sample-sending groove 4 is equipped with electromagnet 5, and opposite side is equipped with tension spring 8, the bottom is provided with discharging opening 9, and upper end one side of kit 6 is equipped with overhead gage 7; The setting-out unit is by agitator 10, water inlet pipe 11, run-down pipe 12, submersible pump 13, nephelometer 14, setting-out pipe 15 and valve 16 are formed, agitator 10 is placed on the below of discharging opening 9, water inlet pipe 11 and run-down pipe 12 are equipped with in its upper end, and wherein the setting height(from bottom) of run-down pipe 12 is lower than water inlet pipe 11, and water inlet pipe 11 links to each other with submersible pump 13 in being placed on experimental trough, agitator 10 inwalls one side is equipped with nephelometer 14, the bottom of agitator 10 is equipped with 2-4 root setting-out pipe 15, on the top of every setting-out pipe 15 valve 16 is installed, and is drilled with circular hole on the setting-out pipe 15; Experimental trough is a rectangle, the centre is provided with two dividing plates experimental trough is divided into two, wherein the length of long dividing plate is 2/3rds of experimental trough total length, the dividing plate lower end is connected with the experimental trough bottom, blind end at experimental trough and breviseptum is placed submersible pump, in addition water pipe one end is connected with submersible pump, the other end rests on the breviseptum; Setting-out pipe 15 is positioned over the experimental trough test block, with the experimental trough bottom vertical; Acoustic Doppler current meter (ADV) 17 is fixed on the special-purpose locating rack, is positioned in the test block of experimental trough; Electromagnet 5 links to each other with Programmable Logic Controller 2 by signal wire with nephelometer 14; Acoustic Doppler current meter (ADV) 17 is connected with computing machine 1 by signal wire.
A kind of automatic dispensing acoustic Doppler current meter (ADV) adds the using method of the device of the agent of making an uproar, and it is characterized in that, uses step as follows:
A. preparation adds the agent raw material of making an uproar, the diatomite powder of sorting particle diameter between 10-20um, drying for standby;
B. dry diatomite powder is placed funnel 3, open submersible pump 13 and will fill water and turn on agitator in the agitator 10, open nephelometer 14 and measure the turbidity value of water body in the agitator 10, open Programmable Logic Controller 2 and set the minimal turbidity value that needs, the turbidity value of water body in the agitator 10 of nephelometer 14 feedbacks is compared with this setting value, if the former is less than the latter, then Programmable Logic Controller 2 sends electrical instruction to electromagnet 5, the kit 6 that diatomite powder is filled in attraction moves to discharging opening 9, diatomite powder is fallen in the agitator 10 to be mixed with clear water, when the turbidity value of zeyssatite suspending liquid in the agitator 10 equals or exceeds setting value, this value feeds back to Programmable Logic Controller 2, Programmable Logic Controller 2 sends cut-offing instruction to electromagnet 5, kit 6 is got back to original position under the effect of tension spring 8, diatomite powder is filled kit 6 automatically again, and circulation so repeatedly guarantees that the turbidity value of zeyssatite suspending liquid in the agitator 10 equals or exceeds setting value all the time;
C. manually opened valve 16, make the zeyssatite suspension in the agitator 10 enter experimental trough by setting-out pipe 15, the submersible pump of opening in the experimental trough flows water body, open acoustic Doppler current meter (ADV) 17 and carry out the fluid-velocity survey experiment, observe snr values by the supporting acquisition softwares of acoustic Doppler current meter (ADV) 17 that are installed in advance on the computing machine 1 simultaneously, make the signal to noise ratio (S/N ratio) of water body in the experimental trough reach the setting of acoustic Doppler current meter (ADV) 17 operation manuals.
According to above technical scheme, can realize following beneficial effect:
The present invention adopts feedback controling mode, can adjust the dispensing amount that adds the agent of making an uproar automatically according to the experiment needs; Adopt electromagnet and tension spring alternating action to make the kit to-and-fro movement, realize that the automatic ration dispensing adds the agent of making an uproar; Adopt porous setting-out pipe to make to add the agent suspension of making an uproar and evenly enter tested water body, hence one can see that: the present invention selects for use cheap zeyssatite to substitute expensive ADV-seeding and impairs the pulverized limestone of ADV probe, adopt the physical construction of simple possible, in conjunction with feedback control system, realized that acoustic Doppler current meter (ADV) adds the evenly dispensing automatically of the agent of making an uproar, with low cost, simple to operate, can satisfy the actual needs of physical model experiment.
Description of drawings
Fig. 1 discharges the structural representation that acoustic Doppler current meter (ADV) adds the device of the agent of making an uproar automatically;
Reference numeral:
The A-control module; The B-feeding unit; C-setting-out unit; The D-experimental trough;
The 1-computing machine; The 2-Programmable Logic Controller; The 3-funnel; The 4-sample-sending groove; The 5-electromagnet; The 6-kit; The 7-overhead gage; The 8-tension spring; The 9-discharging opening; The 10-agitator; The 11-water inlet pipe; The 12-run-down pipe; The 13-submersible pump; The 14-nephelometer; 15-setting-out pipe; The 16-valve; 17-acoustic Doppler current meter (ADV).
Fig. 2 is the experimental trough vertical view;
Fig. 3 is a turbidity FEEDBACK CONTROL process flow diagram.
Embodiment
Embodiment 1: discharge the device that acoustic Doppler current meter (ADV) adds the agent of making an uproar automatically
A kind of automatic dispensing acoustic Doppler current meter (ADV) adds the device of the agent of making an uproar, it is characterized in that: this device is by control module, feeding unit, setting-out unit, experimental trough and acoustic Doppler current meter (ADV) constitute, and wherein said control module is made up of computing machine 1 and Programmable Logic Controller 2; Feeding unit is by funnel 3, sample-sending groove 4, electromagnet 5, kit 6, overhead gage 7, tension spring 8 and discharging opening 9 are formed, the bottom of funnel 3 connects by the charging aperture and the kit 6 of sample-sending groove 4, and inboard one end of sample-sending groove 4 is equipped with electromagnet 5, and opposite side is equipped with tension spring 8, the bottom is provided with discharging opening 9, and upper end one side of kit 6 is equipped with overhead gage 7; The setting-out unit is by agitator 10, water inlet pipe 11, run-down pipe 12, submersible pump 13, nephelometer 14, setting-out pipe 15 and valve 16 are formed, agitator 10 is placed on the below of discharging opening 9, water inlet pipe 11 and run-down pipe 12 are equipped with in its upper end, and wherein the setting height(from bottom) of run-down pipe 12 is lower than water inlet pipe 11, and water inlet pipe 11 links to each other with submersible pump 13 in being placed on experimental trough, agitator 10 inwalls one side is equipped with nephelometer 14, the bottom of agitator 10 is equipped with 2-4 root setting-out pipe 15, on the top of every setting-out pipe 15 valve 16 is installed, and is drilled with circular hole on the setting-out pipe 15; Experimental trough is a rectangle, the centre is provided with two dividing plates experimental trough is divided into two, wherein the length of long dividing plate is 2/3rds of experimental trough total length, the dividing plate lower end is connected with the experimental trough bottom, blind end at experimental trough and breviseptum is placed submersible pump, in addition water pipe one end is connected with submersible pump, the other end rests on the breviseptum; Setting-out pipe 15 is positioned over the experimental trough test block, with the experimental trough bottom vertical; Acoustic Doppler current meter (ADV) 17 is fixed on the special-purpose locating rack, is positioned in the test block of experimental trough; Electromagnet 5 links to each other with Programmable Logic Controller 2 by signal wire with nephelometer 14; Acoustic Doppler current meter (ADV) 17 is connected with computing machine 1 by signal wire.
Wherein:
1. Programmable Logic Controller 2 is Siemens S7-200 PLC, and model is CPU 224XP CN, has two RS485 communication ports, 24 switching value I/O, and 2/1 input and output are totally 3 analog quantity I/O, and the analog quantity conversion accuracy is 12.
2. sample-sending groove 4 is a rectangle organic glass box, is of a size of long 20cm, wide 6cm, and high 6cm, the square aperture that has 4.5cm*4.5cm is as discharging opening.
3. electromagnet 5 is an XRN-P25/20 circular magnetic chuck electromagnet, is of a size of diameter 2.5cm, high 2cm, and deadweight 50g adopts the 12V DC power supply, and the suction that can produce is 50N.
4. kit 6 is the irony rectangular box, is through hole up and down, is of a size of long 5cm, wide 5cm, and high 6cm once can hold the 20g diatomite powder.
5. agitator 10 is the organic glass drum, is of a size of diameter 50cm, high 40cm, and stirrer is equipped with in the bottom, and sidewall is provided with water inlet and overflow vent.Wherein water inlet is positioned at apart from bottom 35cm and highly locates, and has water inlet pipe 11 coupled, and drawing water in the experimental trough by submersible pump 13 enters in the agitator 10.Overflow vent is positioned at apart from bottom 30cm highly to be located, and the water that agitator 10 interior water levels are higher than 30cm will flow back to experimental trough by run-down pipe 12.
6. turbidity is counted the U.S. OBS3+ of D﹠A company turbidimeter, sensor probe diameter 2.5cm, and measurement range is 0 ~ 5g/l.
7. setting-out pipe 15 is an organic glass material circular straighttube, and caliber 1cm bores a circular hole along tube wall every 1cm, and bore dia is 2mm.
8. experimental trough D structure is of a size of long 30m as shown in Figure 2, wide 1m, and high 1m, integral body is cement base, adopts steel frame construction on every side, and both sides are tempered glass, and central dividing plate is a wooden structures.
Embodiment 2: discharge using method and step that acoustic Doppler current meter (ADV) adds the device of the agent of making an uproar automatically
A. preparation adds the agent raw material of making an uproar, the diatomite powder 1000g of sorting particle diameter between 10-20um, drying for standby;
B. dry diatomite powder is placed funnel 3, open submersible pump 13 and will fill water and turn on agitator in the agitator 10, open nephelometer 14 and measure the turbidity value of water body in the agitator 10, open Programmable Logic Controller 2 and set the minimal turbidity value 80mg/l that needs, if the turbidity value of water body is less than 80mg/l in the agitator 10 of nephelometer 14 feedbacks, then Programmable Logic Controller 2 sends electrical instruction to electromagnet 5, the kit 6 that diatomite powder is filled in attraction moves to discharging opening 9, diatomite powder is fallen in the agitator 10 to be mixed with clear water, when the turbidity value of zeyssatite suspending liquid in the agitator 10 equals or exceeds 80mg/l, this value feeds back to Programmable Logic Controller 2, Programmable Logic Controller 2 sends cut-offing instruction to electromagnet 5, kit 6 is got back to original position under the effect of tension spring 8, diatomite powder is filled kit 6 automatically again, circulation so repeatedly guarantees that the turbidity value of zeyssatite suspending liquid in the agitator 10 equals or exceeds 80mg/l all the time;
C. manually opened valve 16, make the zeyssatite suspension in the agitator 10 enter experimental trough by setting-out pipe 15, the submersible pump of opening in the experimental trough flows water body, open acoustic Doppler current meter (ADV) 17 and average the fluid-velocity survey experiment, observe snr value by acoustic Doppler current meter (ADV) the 17 supporting acquisition softwares that are installed in advance on the computing machine 1 simultaneously, make the signal to noise ratio (S/N ratio) of water body in the experimental trough equal or exceed the recommendation of measuring mean flow rate in 5dB(acoustic Doppler current meter (ADV) 17 operation manuals).
Wherein:
Turbidity FEEDBACK CONTROL flow process as shown in Figure 3, concrete steps are as follows:
The second step Programmable Logic Controller 2 reads this electric signal by the AIW0 port, and converts corresponding turbidity value to;
The 3rd step Programmable Logic Controller 2 judges that whether this actual measurement turbidity value is less than given turbidity value;
The 4th step is if less than then opening signal by the output of O0.0 port, close signal otherwise then export;
The 5th step electromagnet 5 receive out signal then attract kit 6 to discharging opening 9 feedings to agitator 10, otherwise stop feeding to agitator 10.
Claims (2)
1. one kind is discharged the device that the acoustic Doppler current meter adds the agent of making an uproar automatically, it is characterized in that: this device is by control module, feeding unit, setting-out unit, experimental trough and acoustic Doppler current meter constitute, and wherein said control module is made up of computing machine (1) and Programmable Logic Controller (2); Feeding unit is by funnel (3), sample-sending groove (4), electromagnet (5), kit (6), overhead gage (7), tension spring (8) and discharging opening (9) are formed, the bottom of funnel (3) connects by the charging aperture and the kit (6) of sample-sending groove (4), and inboard one end of sample-sending groove (4) is equipped with electromagnet (5), and opposite side is equipped with tension spring (8), the bottom is provided with discharging opening (9), and upper end one side of kit (6) is equipped with overhead gage (7); The setting-out unit is by agitator (10), water inlet pipe (11), run-down pipe (12), submersible pump (13), nephelometer (14), setting-out pipe (15) and valve (16) are formed, agitator (10) is placed on the below of discharging opening (9), water inlet pipe (11) and run-down pipe (12) are equipped with in its upper end, wherein the setting height(from bottom) of run-down pipe (12) is lower than water inlet pipe (11), water inlet pipe (11) submersible pump (13) interior with being placed on experimental trough links to each other, agitator (10) inwall one side is equipped with nephelometer (14), the bottom of agitator (10) is equipped with 2-4 root setting-out pipe (15), on the top of every setting-out pipe (15) valve (16) is installed, and the setting-out pipe is drilled with circular hole on (15); Experimental trough is a rectangle, the centre is provided with two dividing plates experimental trough is divided into two, wherein the length of long dividing plate is 2/3rds of experimental trough total length, the dividing plate lower end is connected with the experimental trough bottom, blind end at experimental trough and breviseptum is placed submersible pump, in addition water pipe one end is connected with submersible pump, the other end rests on the breviseptum; Setting-out pipe (15) is positioned over the experimental trough test block, with the experimental trough bottom vertical; Acoustic Doppler current meter (17) is fixed on the special-purpose locating rack, is positioned in the test block of experimental trough; Electromagnet (5) links to each other with Programmable Logic Controller (2) by signal wire with nephelometer (14); Acoustic Doppler current meter (17) is connected with computing machine (1) by signal wire.
2. one kind is discharged the using method that the acoustic Doppler current meter adds the device of the agent of making an uproar automatically, it is characterized in that, uses step as follows:
A. preparation adds the agent raw material of making an uproar, the diatomite powder of sorting particle diameter between 10-20um, drying for standby;
B. dry diatomite powder is placed funnel (3), open submersible pump (13) and will fill water and turn on agitator in the agitator (10), open nephelometer (14) and measure the turbidity value of the interior water body of agitator (10), open Programmable Logic Controller (2) and set the minimal turbidity value that needs, the turbidity value of the interior water body of agitator (10) of nephelometer (14) feedback is compared with this setting value, if the former is less than the latter, then Programmable Logic Controller (2) sends electrical instruction to electromagnet (5), the kit (6) that diatomite powder is filled in attraction moves to discharging opening (9), diatomite powder is fallen in the agitator (10) to be mixed with clear water, when the turbidity value of zeyssatite suspending liquid in the agitator (10) equals or exceeds setting value, this value feeds back to Programmable Logic Controller (2), Programmable Logic Controller (2) sends cut-offing instruction to electromagnet (5), kit (6) is got back to original position under the effect of tension spring (8), diatomite powder is filled kit (6) automatically again, circulation so repeatedly guarantees that the turbidity value of the interior zeyssatite suspending liquid of agitator (10) equals or exceeds setting value all the time;
C. manually opened valve (16), make the zeyssatite suspension in the agitator (10) enter experimental trough by setting-out pipe (15), the submersible pump of opening in the experimental trough flows water body, open acoustic Doppler current meter (17) and carry out the fluid-velocity survey experiment, monitor snr value by being installed in the supporting acquisition software of acoustic Doppler current meter (17) on the computing machine (1) in advance simultaneously, make the signal to noise ratio (S/N ratio) of water body in the experimental trough reach the setting of acoustic Doppler current meter (17) operation manual.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310112384.1A CN103226910B (en) | 2013-04-01 | 2013-04-01 | Device for automatically discharging imnoising agent of acoustic doppler velocimetry and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310112384.1A CN103226910B (en) | 2013-04-01 | 2013-04-01 | Device for automatically discharging imnoising agent of acoustic doppler velocimetry and use method thereof |
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| Publication Number | Publication Date |
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| CN103226910A true CN103226910A (en) | 2013-07-31 |
| CN103226910B CN103226910B (en) | 2015-01-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106596163A (en) * | 2017-01-24 | 2017-04-26 | 天津城建大学 | Integrated experimental system for testing heat dissipation performance of heating equipment |
| CN111474143A (en) * | 2020-04-22 | 2020-07-31 | 山东省交通规划设计院有限公司 | Device and method for testing laser attenuation characteristics of water environment of karst region |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1608198A (en) * | 2001-10-26 | 2005-04-20 | 东京电力株式会社 | Doppler ultrasonic flowmeter |
| CN1926408A (en) * | 2004-02-27 | 2007-03-07 | 富士电机系统株式会社 | Doppler type ultrasonic flowmeter |
-
2013
- 2013-04-01 CN CN201310112384.1A patent/CN103226910B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1608198A (en) * | 2001-10-26 | 2005-04-20 | 东京电力株式会社 | Doppler ultrasonic flowmeter |
| CN1926408A (en) * | 2004-02-27 | 2007-03-07 | 富士电机系统株式会社 | Doppler type ultrasonic flowmeter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106596163A (en) * | 2017-01-24 | 2017-04-26 | 天津城建大学 | Integrated experimental system for testing heat dissipation performance of heating equipment |
| CN106596163B (en) * | 2017-01-24 | 2023-06-02 | 天津城建大学 | Comprehensive experiment system for testing heat radiation performance of heating equipment |
| CN111474143A (en) * | 2020-04-22 | 2020-07-31 | 山东省交通规划设计院有限公司 | Device and method for testing laser attenuation characteristics of water environment of karst region |
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