CN113176066A - Method and device for collecting and distributing fog drops in wind tunnel - Google Patents
Method and device for collecting and distributing fog drops in wind tunnel Download PDFInfo
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- CN113176066A CN113176066A CN202110239666.2A CN202110239666A CN113176066A CN 113176066 A CN113176066 A CN 113176066A CN 202110239666 A CN202110239666 A CN 202110239666A CN 113176066 A CN113176066 A CN 113176066A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
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- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a method and a device for collecting and distributing fog drops in a wind tunnel, which comprises the following steps: arranging a plurality of groups of mounting columns in the wind tunnel along the direction of wind flow; each group of mounting columns comprises two oppositely arranged mounting columns; opening a laser transmitter, and transmitting a laser beam by the laser transmitter in the direction of a laser receiver corresponding to the laser transmitter; adjusting the position of the mounting column provided with the laser receiver to enable the laser receiver to receive the laser beam and ensure that two mounting columns in the same group are positioned on the same plane; and carrying out a fog drop collection test, clamping a test instrument for collecting fog drops in the second clamping mechanism, and collecting the fog drops by the test instrument. The method for collecting and distributing the fog drops in the wind tunnel can ensure that the test instruments for collecting the fog drops in the wind tunnel are in the same plane, improve the precision of test factors in the wind tunnel, and is favorable for obtaining more accurate test data.
Description
Technical Field
The invention relates to a fog drop collecting method and device, in particular to a fog drop collecting and distributing method and device in a wind tunnel.
Background
Agricultural chemicals are often used in agricultural fields to control pests that harm crops. The common method is to spray pesticide in the field by using different spraying devices, the crop leaves are mutually shielded, particularly in the middle and later growth stages of crops, the plants are large, the number of the leaves is large, and the mutual shielding among the leaves forms a canopy with extremely high canopy density on the upper part of the plants, so that pesticide mist drops sprayed on the leaf surfaces are difficult to distribute below the canopy of the plants. Because the spatial distribution rule of pesticide droplets among farmland plants and the relation between the density of the pesticide droplets on a unit area and the control effect of pests are not clear, the pesticide spraying amount is usually based on the drip of leaves on the upper parts of the plants, so that a large amount of pesticide is lost.
Therefore, spray droplets are required to be collected in the operation process of spraying pesticides in a farmland, spraying operation of different pesticide application instruments under different pesticide application parameters is analyzed by collecting droplets on blades on the upper part, the middle part and the lower part of crops, the deposition distribution condition of the liquid medicine droplets on different canopy layers of the crops is known, the penetrability and the deposition uniformity of the spray droplets on different canopy layers of the crops are known, whether heavy spraying or missed spraying exists or not is judged, and the spraying quality, the pesticide utilization rate, the pest control effect and the like of the different pesticide application instruments are evaluated.
In agricultural aviation wind tunnel tests, fog collection materials such as polyethylene wires are often used, but at present, no suitable wind tunnel device is available for fixing the materials. Meanwhile, due to the limitation of test conditions, the test devices cannot be located on the same horizontal plane or vertical plane.
Disclosure of Invention
The invention aims to overcome the existing problems and provides a method for collecting and distributing fog drops in a wind tunnel, which can ensure that test instruments for collecting fog drops in the wind tunnel are in the same plane, improve the precision of test factors in the wind tunnel and be beneficial to acquiring more accurate test data.
The invention also aims to provide a fog drop collecting and distributing device in a wind tunnel.
The purpose of the invention is realized by the following technical scheme:
a fog drop collecting and field distributing method in a wind tunnel comprises the following steps:
arranging a plurality of groups of mounting columns in the wind tunnel along the direction of wind flow; each group of mounting columns comprises two oppositely arranged mounting columns;
opening a laser transmitter, and transmitting a laser beam by the laser transmitter in the direction of a laser receiver corresponding to the laser transmitter; adjusting the position of the mounting column provided with the laser receiver to enable the laser receiver to receive the laser beam and ensure that two mounting columns in the same group are positioned on the same plane;
and carrying out a fog drop collection test, clamping a test instrument for collecting fog drops in the second clamping mechanism, and collecting the fog drops by the test instrument.
In a preferred embodiment of the present invention, a plurality of clamping mechanisms are respectively disposed on two mounting posts of the same group closest to the wind source;
and the other groups of mounting columns are provided with a clamping mechanism. With the structure, a plurality of fog drops are arranged in a group closest to the wind source so as to detect the fog drop parameters on the vertical surface. The remaining groups are mounted one and at the lowest in order to detect parameters on a horizontal plane. The reason why the device is installed at the closest or more positions is that the most fog drop data can be collected at the position closest to the wind source. However, the vertical surfaces are not suitable for installing a plurality of vertical surfaces, because if a plurality of vertical surfaces are installed, the fog drops can remain on the polyethylene wire during the movement, and a large data error is caused for the acquisition on the subsequent polyethylene wire.
Preferably, the clamping mechanisms positioned at the lowest part of the two mounting columns closest to the wind source are positioned on the same plane with the clamping mechanisms on the other groups of mounting columns.
A fog drop collecting and distributing device in a wind tunnel is arranged in the wind tunnel and comprises an installation column, a distributing module and a clamping mechanism; the mounting columns are provided with a plurality of groups, and the plurality of groups of mounting columns are arranged along the direction of the wind flow; each group of mounting columns comprises two oppositely arranged mounting columns;
the field distribution module comprises a laser transmitter and a laser receiver, and the laser transmitter and the laser receiver are respectively and fixedly arranged on two mounting columns in the same group;
the clamping mechanism comprises a first clamping mechanism used for clamping on the mounting column and a second clamping mechanism used for clamping a test instrument for collecting the fogdrops.
According to a preferable scheme of the invention, the upper end and the lower end of the mounting column are respectively provided with a magnetic fixing seat, and the magnetic fixing seats are adsorbed on the inner wall of the wind tunnel through magnetic force.
In a preferred embodiment of the present invention, the mounting post is provided with a height mark.
In a preferred embodiment of the present invention, the first clamping mechanism includes two fixing clamping plates, and the two fixing clamping plates fix the two fixing clamping plates in the middle through fixing screws.
According to a preferable scheme of the invention, the second clamping mechanism comprises a clamping fixed seat, a movable clamping button and a clamping spring, the clamping fixed seat is fixedly connected to one of the fixed clamping plates, the clamping fixed seat is provided with a clamping installation groove and a first clamping fixed hole, and the first clamping fixed hole transversely penetrates through the clamping installation groove;
one end of the movable clamping button extends into the clamping installation groove, and a second clamping fixing hole is formed in the movable clamping button;
the clamping spring is arranged in the clamping mounting groove, and two ends of the clamping spring are respectively abutted against the movable clamping button and the clamping fixing seat. Through above-mentioned structure, when carrying out the fog drip wiring test, down press movable centre gripping button, compression clamping spring, second centre gripping fixed orifices up to movable centre gripping button aligns with the first centre gripping fixed orifices of centre gripping fixing base, insert polyethylene line in first centre gripping fixed orifices and the second centre gripping fixed orifices, then unclamp movable centre gripping button, clamping spring release potential energy, the outside removal of drive movable centre gripping button toward the centre gripping mounting groove to press from both sides the polyethylene line between centre gripping fixing base and movable centre gripping button. The polyethylene wires are tensioned and fixed on another mounting post in the same group according to the same method, so that the polyethylene wires are prevented from moving due to the change of a wind field.
Compared with the prior art, the invention has the following beneficial effects:
the method for collecting and distributing the fog drops in the wind tunnel can ensure that the test instruments for collecting the fog drops in the wind tunnel are in the same plane, improve the precision of test factors in the wind tunnel, and is favorable for obtaining more accurate test data.
Drawings
Fig. 1 is a perspective three-dimensional structure schematic diagram of a fog drop collecting and distributing device in a wind tunnel.
Fig. 2 is a schematic perspective view of the mounting post of the present invention.
Fig. 3 is an enlarged view of X in fig. 2.
Fig. 4 is a schematic perspective view of the clamping mechanism of the present invention.
Detailed Description
In order to make those skilled in the art understand the technical solutions of the present invention well, the following description of the present invention is provided with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
Referring to fig. 1, the fog droplet collecting and field distributing device in the wind tunnel in the embodiment is arranged in the wind tunnel, and comprises an installation column 1, a field distributing module and a clamping mechanism; the mounting columns 1 are provided with a plurality of groups, and the plurality of groups of mounting columns 1 are arranged along the direction of wind flow; each group of mounting columns 1 comprises two mounting columns 1 which are oppositely arranged; the upper and lower ends of the mounting column 1 are provided with magnetic fixing seats 2, and the magnetic fixing seats 2 are adsorbed on the inner wall of the wind tunnel through magnetic force.
Referring to fig. 1-2, the layout module includes a laser transmitter 3 and a laser receiver (not shown in the figures), and the laser transmitter 3 and the laser receiver are respectively and fixedly arranged on two mounting posts 1 in the same group; of course, two mutually perpendicular laser transmitters 3 may also be arranged on the same mounting post 1, wherein one laser transmitter 3 transmits laser beams to the same group of laser receivers, and the other laser transmitter 3 transmits laser beams to the next group of laser receivers; alternatively, the laser transmitter 3 and the laser receiver perpendicular to each other may be provided on the same mounting post 1, and may emit laser light while receiving laser light.
Referring to fig. 2-4, the clamping mechanism includes a first clamping mechanism for clamping on the mounting column 1 and a second clamping mechanism for clamping the testing instrument for collecting droplets, and the mounting column 1 is provided with height marks. The first clamping mechanism comprises two fixed clamping plates 4, and the two fixed clamping plates 4 are fixed in the middle of the first clamping mechanism through fixing screws.
Referring to fig. 3-4, the second clamping mechanism includes a clamping fixing seat 5, a movable clamping button 6 and a clamping spring 7, the clamping fixing seat 5 is fixedly connected to one of the fixing splints 4, a clamping mounting groove and a first clamping fixing hole 5-1 are formed in the clamping fixing seat 5, and the first clamping fixing hole 5-1 traverses the clamping mounting groove; one end of the movable clamping button 6 extends into the clamping installation groove, and a second clamping fixing hole 6-1 is formed in the movable clamping button 6; the clamping spring 7 is arranged in the clamping mounting groove, and two ends of the clamping spring are respectively abutted against the movable clamping button 6 and the clamping fixing seat 5. Through the structure, when a fog drop wiring test is carried out, the movable clamping button 6 is pressed downwards, the clamping spring 7 is compressed until the second clamping fixing hole 6-1 of the movable clamping button 6 is aligned with the first clamping fixing hole 5-1 of the clamping fixing seat 5, a polyethylene wire is inserted into the first clamping fixing hole 5-1 and the second clamping fixing hole 6-1, then the movable clamping button 6 is loosened, potential energy is released by the clamping spring 7, the movable clamping button 6 is driven to move towards the outer side of the clamping mounting groove, and therefore the polyethylene wire is clamped between the clamping fixing seat 5 and the movable clamping button 6. The polyethylene wires are tensioned and fixed on another mounting post 1 in the same group according to the same method, so that the polyethylene wires are prevented from moving due to the change of the wind field.
Referring to fig. 1 to 4, the method for collecting and distributing the fog drops in the wind tunnel in the embodiment includes the following steps:
in the wind tunnel, a plurality of groups of mounting columns 1 are arranged along the direction of wind flow; wherein, every group erection column 1 includes two relative arrangement's erection column 1. Wherein, a plurality of clamping mechanisms are respectively arranged on the two mounting columns 1 which are closest to the wind source and in the same group; and the other groups of mounting columns 1 are provided with a clamping mechanism. The clamping mechanisms positioned at the lowest part of the two mounting columns 1 closest to the wind source and the clamping mechanisms on the mounting columns 1 of other groups are positioned on the same plane.
Opening the laser transmitter 3, and transmitting a laser beam by the laser transmitter 3 to the direction of the corresponding laser receiver; the position of the mounting post 1 provided with the laser receiver is adjusted, so that the laser receiver receives a laser beam, and two mounting posts 1 in the same group are ensured to be positioned on the same plane.
And carrying out a fog drop collection test, clamping a test instrument for collecting fog drops in the second clamping mechanism, and collecting the fog drops by the test instrument.
The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.
Claims (8)
1. A fog drop collecting and field distributing method in a wind tunnel is characterized by comprising the following steps:
arranging a plurality of groups of mounting columns in the wind tunnel along the direction of wind flow; each group of mounting columns comprises two oppositely arranged mounting columns;
opening a laser transmitter, and transmitting a laser beam by the laser transmitter in the direction of a laser receiver corresponding to the laser transmitter; adjusting the position of the mounting column provided with the laser receiver to enable the laser receiver to receive the laser beam and ensure that two mounting columns in the same group are positioned on the same plane;
and carrying out a fog drop collection test, clamping a test instrument for collecting fog drops in the second clamping mechanism, and collecting the fog drops by the test instrument.
2. The method for collecting and distributing the fog drops in the wind tunnel according to claim 1, wherein a plurality of clamping mechanisms are respectively arranged on two mounting columns which are closest to a wind source and in the same group;
and the other groups of mounting columns are provided with a clamping mechanism.
3. The method for collecting and distributing the fog drops in the wind tunnel according to claim 2, wherein the clamping mechanisms positioned at the lowest part of the two mounting columns closest to the wind source and the clamping mechanisms positioned on the mounting columns of other groups are positioned on the same plane.
4. A fog drop collecting and distributing device in a wind tunnel is characterized by being arranged in the wind tunnel and comprising an installation column, a distributing module and a clamping mechanism; the mounting columns are provided with a plurality of groups, and the plurality of groups of mounting columns are arranged along the direction of the wind flow; each group of mounting columns comprises two oppositely arranged mounting columns;
the field distribution module comprises a laser transmitter and a laser receiver, and the laser transmitter and the laser receiver are respectively and fixedly arranged on two mounting columns in the same group;
the clamping mechanism comprises a first clamping mechanism used for clamping on the mounting column and a second clamping mechanism used for clamping a test instrument for collecting the fogdrops.
5. The device for collecting and distributing the fog drops in the wind tunnel according to claim 4, wherein the upper end and the lower end of the mounting column are respectively provided with a magnetic fixing seat, and the magnetic fixing seats are adsorbed on the inner wall of the wind tunnel through magnetic force.
6. The device for collecting and distributing fog drops in a wind tunnel according to claim 4, wherein the mounting posts are provided with height marks.
7. The device for collecting and distributing the fog drops in the wind tunnel according to claim 4, wherein the first clamping mechanism comprises two fixing clamping plates, and the two fixing clamping plates fix the two fixing clamping plates in the middle through fixing screws.
8. The device for collecting and distributing the fog drops in the wind tunnel according to claim 7, wherein the second clamping mechanism comprises a clamping fixing seat, a movable clamping button and a clamping spring, the clamping fixing seat is fixedly connected to one of the fixed clamping plates, a clamping mounting groove and a first clamping fixing hole are formed in the clamping fixing seat, and the first clamping fixing hole transversely penetrates through the clamping mounting groove;
one end of the movable clamping button extends into the clamping installation groove, and a second clamping fixing hole is formed in the movable clamping button;
the clamping spring is arranged in the clamping mounting groove, and two ends of the clamping spring are respectively abutted against the movable clamping button and the clamping fixing seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110239666.2A CN113176066B (en) | 2021-03-03 | 2021-03-03 | Method and device for collecting and distributing fog drops in wind tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110239666.2A CN113176066B (en) | 2021-03-03 | 2021-03-03 | Method and device for collecting and distributing fog drops in wind tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113176066A true CN113176066A (en) | 2021-07-27 |
| CN113176066B CN113176066B (en) | 2022-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110239666.2A Active CN113176066B (en) | 2021-03-03 | 2021-03-03 | Method and device for collecting and distributing fog drops in wind tunnel |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300851A (en) * | 2015-11-11 | 2016-02-03 | 中国农业大学 | Method for detecting spraying droplet three-dimensional distribution based on laser technology |
| CN106768819A (en) * | 2016-12-30 | 2017-05-31 | 北京农业智能装备技术研究中心 | The apparatus and method of droplet drift space distribution situation in measurement wind-tunnel |
| CN109580159A (en) * | 2018-10-23 | 2019-04-05 | 华南农业大学 | It is a kind of to measure fixed receipts connecton layout and application method for float of mist droplet in wind-tunnel |
| CN111442898A (en) * | 2020-05-29 | 2020-07-24 | 大连理工大学 | Small and medium-sized low-speed wind tunnel test device for testing pesticide fog drop space operation characteristics and drift deposition |
| CN211927230U (en) * | 2020-05-29 | 2020-11-13 | 大连理工大学 | Small and medium-sized low-speed wind tunnel test device for testing pesticide fog drop space operation characteristics and drift deposition |
-
2021
- 2021-03-03 CN CN202110239666.2A patent/CN113176066B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300851A (en) * | 2015-11-11 | 2016-02-03 | 中国农业大学 | Method for detecting spraying droplet three-dimensional distribution based on laser technology |
| CN106768819A (en) * | 2016-12-30 | 2017-05-31 | 北京农业智能装备技术研究中心 | The apparatus and method of droplet drift space distribution situation in measurement wind-tunnel |
| CN109580159A (en) * | 2018-10-23 | 2019-04-05 | 华南农业大学 | It is a kind of to measure fixed receipts connecton layout and application method for float of mist droplet in wind-tunnel |
| CN111442898A (en) * | 2020-05-29 | 2020-07-24 | 大连理工大学 | Small and medium-sized low-speed wind tunnel test device for testing pesticide fog drop space operation characteristics and drift deposition |
| CN211927230U (en) * | 2020-05-29 | 2020-11-13 | 大连理工大学 | Small and medium-sized low-speed wind tunnel test device for testing pesticide fog drop space operation characteristics and drift deposition |
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| CN113176066B (en) | 2022-11-29 |
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