CN202092882U - Performance test system for seed sowing machine - Google Patents
Performance test system for seed sowing machine Download PDFInfo
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- CN202092882U CN202092882U CN 201120178985 CN201120178985U CN202092882U CN 202092882 U CN202092882 U CN 202092882U CN 201120178985 CN201120178985 CN 201120178985 CN 201120178985 U CN201120178985 U CN 201120178985U CN 202092882 U CN202092882 U CN 202092882U
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- seed
- feed mechanism
- bed
- test macro
- strip sowing
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Abstract
The utility model relates to a performance test system for a seed sowing amchine. The performance test system comprises a machine frame, wherein a seedbed belt device, a fan driving device, a seed sowing device, an oiling device, a seed receiving device, a data acquisition device and a control system are installed on the frame; the fan driving device, the seed sowing device and the oiling device are sequentially arranged on a seedbed belt of the seedbed belt device; the seed receiving device is arranged below one end of the seedbed belt; the data acquisition device is installed on the seedbed belt device; and the control system is respectively connected with the seedbed belt device, the fan driving device, the seed sowing device, the oiling device and the data acquisition device. The performance test system for the seed sowing machine can be used for the performance test of a drilling seed sowing device or a precision seed sowing device and has higher testing precision and automation level.
Description
Technical field
The utility model relates to a kind of agricultural machinery performance test apparatus, particularly a kind of multi-functional seed sowing device performance test macro based on image processing techniques.
Background technology
The field test of seeding machinery is subjected to seasonal effect, and the R﹠D cycle is long, has restricted the research and development speed of novel features or improvement parts, the also corresponding development that restricts its technical.Feed mechanism for seed is the core component of seeding machinery, and its technical merit and performance directly influence seeding quality.From version or functional classification feed mechanism for seed polytype is arranged, at Different Crop type and kind, therefore same seed sowing device performance has very big-difference again, researchs and develops out the testing table that detects at seed sowing device performance, be quicken these parts and complete machine development optimal path it
The feed mechanism for seed pilot system function singleness of prior art, as publication number is CN85201873U, March 19 1986 day for announcing, name is called the Chinese utility model patent of " vegetables feed mechanism for seed testing table ", this patent disclosure a kind of testing table of vegetables feed mechanism for seed, it utilizes electric charge coupling CCD camera technique, be connected as a single entity by special purpose interface and microprocessing, it is the application of more early stage camera technique, fast development along with electronic technology, it detects with data processing technique and is in a backward condition, and measuring accuracy is low, and this testing table only relates to the detection of vegetables feed mechanism for seed in addition.Patent announcement number is CN2777527Y, May 3 2006 day for announcing, name is called the Chinese utility model patent of " machine vision feed mechanism for seed testing table ", a kind of computer vision feed mechanism for seed testing table is disclosed, it comprises test-bed, be installed in fueling injection equipment, feed mechanism for seed erecting frame, feed mechanism for seed drive motor, a kind bed conveying belt, oil pump and conveying belt drive motor on the test-bed, and source of the gas blower fan, computer vision system and control system.Computer vision system adopts industrial camera, links to each other with microprocessor by industrial black white image PCI capture card; Control system adopts high precision incremental rotating speed coder, links to each other with the RS232 serial ports of microprocessor by the PLC controller, and it is used for high speed Pneumatic type seed sowing device performance experimental test.The weak point of this patent is be fit to the test of single file feed mechanism for seed, and it to be only applicable to the performance test of Pneumatic type feed mechanism for seed.Another notification number is CN201069905Y, June 11 2008 day for announcing, name is called the Chinese utility model patent of " seeder feed mechanism for seed testing table ", disclose and a kind ofly be suitable for the drum-type feed mechanism for seed that cotton, corn, beet use and detect testing table, only introduced the mechanical composition of experiment table in this patent, do not have data handling system, it only is used for the detection of drum-type feed mechanism for seed in addition, and its range of application is narrower.
The utility model content
Technical problem to be solved in the utility model provides a kind of high seed sowing device performance test macro of Performance Detection, measuring accuracy height, automatization level that can be used for strip sowing seed discharge device or precision seeder.
To achieve these goals, the utility model provides a kind of feed mechanism for seed test macro, comprise frame and be installed in kind bed belting on the described frame, fan drive device, dispenser, oiling station, classification inoculation apparatus, data collector and control system, wherein, described fan drive device, described dispenser and described oiling station are set in sequence in described kind bed of planting the bed belting and are with, described classification inoculation apparatus is arranged on described end below of planting the bed band, described data collector is installed on the described kind bed belting, described control system respectively with described a kinds belting, described fan drive device, described dispenser, described oiling station and described data collector connect.
Above-mentioned feed mechanism for seed test macro, wherein, described dispenser comprises the feed mechanism for seed erecting frame and is installed in servomotor and gear train on the described feed mechanism for seed erecting frame, described gear train is connected with described servomotor, described feed mechanism for seed erecting frame is provided with the Precision Seeding feed mechanism for seed attachment rail that is used to that the strip sowing seed discharge device link of strip sowing seed discharge device is installed and is used to install the Precision Seeding feed mechanism for seed, and described strip sowing seed discharge device is connected with described gear train respectively with described Precision Seeding feed mechanism for seed.
Above-mentioned feed mechanism for seed test macro, wherein, described feed mechanism for seed erecting frame is provided with the leading screw that is used to regulate height, and described strip sowing seed discharge device link is connected with described feed mechanism for seed erecting frame by described leading screw, and described strip sowing seed discharge device is installed on the described strip sowing seed discharge device link.
Above-mentioned feed mechanism for seed test macro wherein, can be installed a plurality of described strip sowing seed discharge devices on the described strip sowing seed discharge device link side by side.
Above-mentioned feed mechanism for seed test macro, wherein, described data collector comprises scrambler and image collecting device, described scrambler is installed in described end of planting the initiative drive shaft of bed belting, described image collecting device is arranged on the top of described kind bed band and is positioned at described fan drive device the place ahead, and described scrambler and described image collecting device are connected with described control system respectively.
Above-mentioned feed mechanism for seed test macro, wherein, described control system comprises control desk and industrial computer, motor frequency conversion device and servo controller are installed in the described control desk, in the described industrial computer control module is installed, the input end of described motor frequency conversion device is connected with described blower fan drive motor with described kind bed band drive motor respectively, the output terminal of described motor frequency conversion device is connected with described control module, the input end of described servo controller is connected with described servomotor, and the output terminal of described servo controller is connected with described control module.
Above-mentioned feed mechanism for seed test macro, wherein, image pick-up card, I/O card, PCI serial ports adapter and RS232 serial ports are installed in the draw-in groove of described industrial computer, described image pick-up card is connected with described image collecting device, described I/O card is connected with described scrambler, described PCI serial ports adapter is connected with described frequency converter, and described RS232 serial ports is connected with described servo controller.
Above-mentioned feed mechanism for seed test macro, wherein, described image collecting device comprises camera and support, described camera 522 is installed on the described support.
Above-mentioned feed mechanism for seed test macro, wherein, described camera is a line-scan digital camera.
Above-mentioned feed mechanism for seed test macro, wherein, described classification inoculation apparatus comprises seeds scraper, seeds scraper regulating device and inoculating hood, described seeds scraper is resisted against described kind bed and is with, described seeds scraper regulating device is fixed on the described frame and with described seeds scraper and is connected, described inoculating hood is arranged on described seeds scraper below, is provided with the sieves that is used for separating oil and seed in the described inoculating hood.
Beneficial functional of the present utility model is:
1, the scope of application is extensive, both can be used for the Performance Detection of strip sowing seed discharge device, can carry out the Performance Detection of precision seeder again;
2, can carry out the detection of a plurality of feed mechanism for seeds simultaneously;
3, images acquired and data processing in real time;
4, automatization level height is finished kind of a bed band motion, feed shaft rotation automatically, is coated with wet goods.
Below in conjunction with the drawings and specific embodiments the utility model is described in detail, but not as to qualification of the present utility model.
Description of drawings
Fig. 1 is the structural representation of the utility model one embodiment;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the feed mechanism for seed installation frame body structural representation of the utility model one embodiment;
Fig. 4 is kind of the oil-scraping device structural representation of scraping of the utility model one embodiment;
Fig. 5 is a kind bed band motion control process flow diagram of the present utility model;
Fig. 6 is that feed shaft of the present utility model rotates control flow chart.
Wherein, Reference numeral
1 frame
2 kinds of bed beltings
21 kinds of bed bands
22 upper supporting rollers
23 snub pulleys
24 kinds of bed band active live-roller supports
25 kinds of bed band active live-rollers
26 kinds of bed band drive motor
27 shaft couplings
28 kinds of beds are with passive live-roller and tension part
3 fan drive devices
31 blower fan drive system erecting frames
The combination of 32 fan belt wheel
33 blower fan drive motor
34 blower fans
4 dispensers
41 feed mechanism for seed erecting frames
411 strip sowing seed discharge device links
412 Precision Seeding feed mechanism for seed attachment rails
413 leading screws
42 strip sowing seed discharge devices
421 kinds of casees
422 feed mechanism for seeds
43 servomotors
44 gear trains
45 driving chains
46 erecting frame fixed parts
5 data collectors
51 scramblers
52 image collecting devices
521 supports
522 cameras
6 oiling stations
61 oiling mechanisms
62 fuel tanks
63 oil pumps
7 classification inoculation apparatus
71 seeds scrapers
72 seeds scraper regulating devices
73 seeds scraper ground ways
74 inoculating hoods
75 seed receiving vehicles
8 control system
81 control desks
82 industrial computers
83 motor frequency conversion devices
84 servo controllers
Embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and principle of work are done concrete description:
Referring to Fig. 1, Fig. 2, Fig. 1 is the structural representation of the utility model one embodiment, and Fig. 2 is the vertical view of Fig. 1.Feed mechanism for seed test macro of the present utility model, comprise frame 1 and be installed in kind bed belting 2 on the described frame 1, fan drive device 3, dispenser 4, oiling station 6, classification inoculation apparatus 7, data collector 5 and control system 8, wherein, frame 1 is the skeleton of pilot system, critical component is connected with it, described fan drive device 3, described dispenser 4 and described oiling station 6 are set in sequence in described kind bed of planting bed belting 2 and are with on 21, described classification inoculation apparatus 7 is arranged on the described bed of planting with below 21 the end, described data collector 5 is installed on the described kind bed belting 2, described control system 8 respectively with described a kinds belting 2, described fan drive device 3, described dispenser 4, described oiling station 6 and described data collector 5 connect.
Referring to Fig. 3, Fig. 3 is the feed mechanism for seed installation frame body structural representation of the utility model one embodiment.In the present embodiment, described dispenser 4 comprises feed mechanism for seed erecting frame 41 and is installed in servomotor 43 and gear train 44 on the described feed mechanism for seed erecting frame 41, described gear train 44 is connected with described servomotor 43, described feed mechanism for seed erecting frame 41 is provided with and is used to install the strip sowing seed discharge device link 411 of strip sowing seed discharge device 42 and is used to install the Precision Seeding feed mechanism for seed Precision Seeding feed mechanism for seed attachment rail 412 of (figure does not show), and described strip sowing seed discharge device 42 is connected with described gear train 44 respectively with described Precision Seeding feed mechanism for seed.
Wherein, described feed mechanism for seed erecting frame 41 is provided with the leading screw 413 that is used to regulate height, described strip sowing seed discharge device link 411 is connected with described feed mechanism for seed erecting frame 41 by described leading screw 413, and described strip sowing seed discharge device 42 is installed on the described strip sowing seed discharge device link 411.On the described strip sowing seed discharge device link 411 a plurality of described strip sowing seed discharge devices 42 can be installed side by side, side by side 3 strip sowing seed discharge devices 42 being installed with the while in the present embodiment is preferred version.The feed mechanism for seed 422 of strip sowing seed discharge device 42 and kind case 421 articulate mutually with strip sowing seed discharge device link 411, and strip sowing seed discharge device link 411 is finished highly by screw mandrel 413 and regulated, and has 3 strip sowing seed discharge devices 42.Gear train 44 is driven by servomotor 43, drives feed shaft by driving chain 45 and rotates, and gear train 44 is common to and drives strip sowing seed discharge device axle and Precision Seeding feed mechanism for seed axle.Precision Seeding feed mechanism for seed attachment rail 412 can be installed the Precision Seeding feed mechanism for seed of different types.
Referring to Fig. 4, Fig. 4 is kind of the oil-scraping device structural representation of scraping of the utility model one embodiment.Described classification inoculation apparatus 7 comprises seeds scraper 71, seeds scraper regulating device 72 and inoculating hood 74, described seeds scraper 71 is resisted against described kind bed and is with on 21, described seeds scraper regulating device 72 is fixed on the described frame 1 and with described seeds scraper 71 and is connected, described inoculating hood 74 is arranged on described seeds scraper 71 belows, is provided with the sieves that is used for separating oil and seed in the described inoculating hood 74.This part has the function of cleaning kind of bed with seed on 21 and oil, is provided with seeds scraper 71 below kind of a bed is with 21 ends, and seeds scraper 71 is fixed on the seeds scraper ground way 73, adjusts the height and the angle of seeds scrapers 71 by seeds scraper regulating device 72; Seed that scrapes and oil fall in the inoculating hood 74 of seeds scraper 71 belows, in the inoculating hood 74 sieves are arranged, and seed is stayed in the sieve, oil flows back to fuel tank 62 after filtering, and recycles, and classification inoculation apparatus 7 can be placed on the seed receiving vehicle 75, can slide cleaning of crossing seed easy to use.
Planting a bed band active live-roller 25 is installed on kind of the bed band active live-roller support 24, initiatively live-roller support 24 is fixing with frame 1, plant a band drive motor 26 and kind bed and be with active live-roller 25 usefulness shaft couplings 27 concentrics to be connected, scrambler 51 concentrics are installed in initiatively live-roller 25 ends of kind of bed band; Upper supporting roller 22, snub pulley 23 and kind bed are with passive live-roller and tension part 28 to be fixed on the frame 1, plant bed and are with 21 by carrying roller 22,23 supports up and down; Oiling station 6 is fixed on the frame 1; Oil pump 63, seeds scraper regulating device 72 are installed on the fuel tank 62, and seeds scraper regulating device 72 is connected with frame 1; Fan drive device 3 comprises blower fan drive system erecting frame 31, blower fan 34, blower fan drive motor 33, fan belt wheel combination 32, blower fan 34, blower fan drive motor 33, fan belt wheel combination 32 etc. are installed on the blower fan drive system erecting frame 31, and blower fan drive system erecting frame 31 is articulated on the frame 1.Feed mechanism for seed erecting frame 41 is fixed by erecting frame fixed part 46 and ground.The support 521 of image collecting device 52 fixes on the ground, and camera 522 is installed on the support 521.Plant the motor frequency conversion device 83 of bed band drive motor 26, blower fan drive motor 33, the servo controller 84 of servomotor 43 is installed in the control desk 81, industrial computer 82 is placed on the control desk 81, and image pick-up card, I/O card, PCI serial ports adapter etc. insert in the draw-in groove of industrial computer 82.
Referring to Fig. 5, Fig. 5 is a kind bed band motion control process flow diagram of the present utility model.In the present embodiment, described data collector 5 comprises scrambler 51 and image collecting device 52, described scrambler 51 is installed in described end of planting the initiative drive shaft of bed belting 2, described image collecting device 52 is arranged on the described bed of planting with 21 top and be positioned at described fan drive device 3 the place aheads, and described scrambler 51 and described image collecting device 52 are connected with described control system 8 respectively.
Described control system 8 comprises control desk 81 and industrial computer 82, motor frequency conversion device 83 and servo controller 84 are installed in the described control desk 81, in the described industrial computer 82 control module is installed, the input end of described motor frequency conversion device 83 is connected with described blower fan drive motor 33 with described kind bed band drive motor respectively, the output terminal of described motor frequency conversion device 83 is connected with described control module, the input end of described servo controller 84 is connected with described servomotor 43, and the output terminal of described servo controller 84 is connected with described control module.
Image pick-up card, I/O card, PCI serial ports adapter and RS232 serial ports are installed in the draw-in groove of described industrial computer 82, described image pick-up card is connected with described image collecting device 52, described I/O card is connected with described scrambler 51, described PCI serial ports adapter is connected with described motor frequency conversion device 83, and described RS232 serial ports is connected with described servo controller 84.
In the present embodiment, described image collecting device 52 comprises camera 522 and support 521, and described camera 522 is installed on the described support 521.Described camera 522 is preferably line-scan digital camera 522.
At first to carry out the initialization operation of I/O card, scrambler 51 and serial ports adapter behind the running software.After telecontrol equipments such as motor were started working, industrial computer 82 can pass through scrambler 51 and I/O card acquisition speed signal.The rate signal that collects on the one hand will be in industrial computer 82 relatively and carry out PID control, rate signal will send to camera control circuit and trigger camera 52 images acquired on the other hand.
Referring to Fig. 6, Fig. 6 is that feed shaft of the present utility model rotates control flow chart.After servomotor 43 was started working, industrial computer 82 can pass through scrambler 51 and I/O card acquisition speed signal.Relatively and carry out PID control, control signal sends to the rotating speed that servo controller 84 is adjusted servomotor 43 by serial ports to the rate signal that collects then in industrial computer 82.Control system 8 of the present utility model is that hardware and software combines and controls, hardware controls mainly is that industrial computer 82 adopts serial ports that motor frequency conversion device 83 and servo controller 84 are opened, stop and speed control, described motor frequency conversion device 83 comprises kind of bed band drive motor frequency converter and blower fan drive motor frequency converter, the input end of frequency converter is continuous with corresponding motor respectively, and output terminal is connected with PCI serial ports adapter; Described servo controller 84 is used to control the servomotor 43 that the feed shaft rotation is used, and the controller input end links to each other with servomotor 43, and output terminal links to each other with the RS232 serial ports.Line-scan digital camera 52 links to each other with image pick-up card, provide trigger pip by the rotary encoder 51 on kind of the bed band initiative drive shaft, carry out triggering collection, described rotary encoder 51 concentrics are installed in kind of a bed band initiative drive shaft end, and the output terminal of this scrambler 51 links to each other with the I/O card.Software control is to finish on industrial computer 82, at first accepts outside rate signal and compares, and carries out pid control computation then, sends to frequency converter, controller exporting the result by serial ports.
The utlity model has following advantage:
1, the scope of application is extensive, both can be used for the Performance Detection of strip sowing seed discharge device, can carry out the Performance Detection of precision seeder again.
2, can carry out the detection of a plurality of feed mechanism for seeds simultaneously.
3, images acquired and data processing in real time.
4, automatization level height, kind bed band moves, feed shaft rotates, be coated with wet goods finishes automatically.
To sum up, the utility model application image treatment technology, acquisition process data in real time; Unique multi-functional feed mechanism for seed installation frame body combination can be carried out the performance test of drilling and accurate two class feed mechanism for seeds, carries out the test of a plurality of feed mechanism for seeds simultaneously.
Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (10)
1. feed mechanism for seed test macro, comprise frame and be installed in kind bed belting on the described frame, fan drive device, dispenser, oiling station, classification inoculation apparatus, data collector and control system, it is characterized in that, described fan drive device, described dispenser and described oiling station are set in sequence in described kind bed of planting the bed belting and are with, described classification inoculation apparatus is arranged on described end below of planting the bed band, described data collector is installed on the described kind bed belting, described control system respectively with described a kinds belting, described fan drive device, described dispenser, described oiling station and described data collector connect.
2. feed mechanism for seed test macro as claimed in claim 1, it is characterized in that, described dispenser comprises the feed mechanism for seed erecting frame and is installed in servomotor and gear train on the described feed mechanism for seed erecting frame, described gear train is connected with described servomotor, described feed mechanism for seed erecting frame is provided with the Precision Seeding feed mechanism for seed attachment rail that is used to that the strip sowing seed discharge device link of strip sowing seed discharge device is installed and is used to install the Precision Seeding feed mechanism for seed, and described strip sowing seed discharge device is connected with described gear train respectively with described Precision Seeding feed mechanism for seed.
3. feed mechanism for seed test macro as claimed in claim 2, it is characterized in that, described feed mechanism for seed erecting frame is provided with the leading screw that is used to regulate height, described strip sowing seed discharge device link is connected with described feed mechanism for seed erecting frame by described leading screw, and described strip sowing seed discharge device is installed on the described strip sowing seed discharge device link.
4. feed mechanism for seed test macro as claimed in claim 3 is characterized in that, on the described strip sowing seed discharge device link a plurality of described strip sowing seed discharge devices can be installed side by side.
5. as any described feed mechanism for seed test macro in the claim 1～4, it is characterized in that, described data collector comprises scrambler and image collecting device, described scrambler is installed in described end of planting the initiative drive shaft of bed belting, described image collecting device is arranged on the top of described kind bed band and is positioned at described fan drive device the place ahead, and described scrambler and described image collecting device are connected with described control system respectively.
6. feed mechanism for seed test macro as claimed in claim 5, it is characterized in that, described control system comprises control desk and industrial computer, motor frequency conversion device and servo controller are installed in the described control desk, in the described industrial computer control module is installed, the input end of described motor frequency conversion device is connected with described blower fan drive motor with described kind bed band drive motor respectively, the output terminal of described motor frequency conversion device is connected with described control module, the input end of described servo controller is connected with described servomotor, and the output terminal of described servo controller is connected with described control module.
7. feed mechanism for seed test macro as claimed in claim 6, it is characterized in that, image pick-up card, I/O card, PCI serial ports adapter and RS232 serial ports are installed in the draw-in groove of described industrial computer, described image pick-up card is connected with described image collecting device, described I/O card is connected with described scrambler, described PCI serial ports adapter is connected with described frequency converter, and described RS232 serial ports is connected with described servo controller.
8. as claim 6 or 7 described feed mechanism for seed test macros, it is characterized in that described image collecting device comprises camera and support, described camera is installed on the described support.
9. feed mechanism for seed test macro as claimed in claim 8 is characterized in that, described camera is a line-scan digital camera.
10. feed mechanism for seed test macro as claimed in claim 5, it is characterized in that, described classification inoculation apparatus comprises seeds scraper, seeds scraper regulating device and inoculating hood, described seeds scraper is resisted against described kind bed and is with, described seeds scraper regulating device is fixed on the described frame and with described seeds scraper and is connected, described inoculating hood is arranged on described seeds scraper below, is provided with the sieves that is used for separating oil and seed in the described inoculating hood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120178985 CN202092882U (en) | 2011-05-27 | 2011-05-27 | Performance test system for seed sowing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120178985 CN202092882U (en) | 2011-05-27 | 2011-05-27 | Performance test system for seed sowing machine |
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| Publication Number | Publication Date |
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| CN202092882U true CN202092882U (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120178985 Expired - Lifetime CN202092882U (en) | 2011-05-27 | 2011-05-27 | Performance test system for seed sowing machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104335741A (en) * | 2014-10-30 | 2015-02-11 | 重庆鑫水机械制造有限公司 | Seed-metering device mounting frame |
| CN107966312A (en) * | 2017-11-30 | 2018-04-27 | 吉林大学 | Seed spring is test bed |
| CN109085002A (en) * | 2018-08-27 | 2018-12-25 | 中国农业大学 | A kind of reciprocating motion type intermittent sampling mechanism on wheat seeding apparatus test-bed |
| CN109387388A (en) * | 2018-12-28 | 2019-02-26 | 中国农业大学 | A kind of universal seed-metering performance detector |
-
2011
- 2011-05-27 CN CN 201120178985 patent/CN202092882U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104335741A (en) * | 2014-10-30 | 2015-02-11 | 重庆鑫水机械制造有限公司 | Seed-metering device mounting frame |
| CN107966312A (en) * | 2017-11-30 | 2018-04-27 | 吉林大学 | Seed spring is test bed |
| CN109085002A (en) * | 2018-08-27 | 2018-12-25 | 中国农业大学 | A kind of reciprocating motion type intermittent sampling mechanism on wheat seeding apparatus test-bed |
| CN109387388A (en) * | 2018-12-28 | 2019-02-26 | 中国农业大学 | A kind of universal seed-metering performance detector |
| CN109387388B (en) * | 2018-12-28 | 2024-01-12 | 中国农业大学 | Universal seed metering performance detector |
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Granted publication date: 20111228 |