CN105758657B - Precision seeder working performance on-line measuring device based on electrostatic transducer - Google Patents
Precision seeder working performance on-line measuring device based on electrostatic transducer Download PDFInfo
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- CN105758657B CN105758657B CN201610225335.2A CN201610225335A CN105758657B CN 105758657 B CN105758657 B CN 105758657B CN 201610225335 A CN201610225335 A CN 201610225335A CN 105758657 B CN105758657 B CN 105758657B
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- precision seeder
- metal electrode
- electrostatic transducer
- circular metal
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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
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C7/00—Sowing
- A01C7/20—Parts of seeders for conducting and depositing seed
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
Abstract
The invention discloses a kind of precision seeder working performance on-line measuring devices based on electrostatic transducer for belonging to agricultural automation mechanical detection technical scope.The device is embedded on the inner wall of precision seeder discharging tube by N circular metal electrode for forming sensor probe, and along arranged in parallel with the vertical direction of seed movement, to form circular metal electrode array, then it is connected by shielded cable with signal conditioning module；Signal conditioning module connects display module by signal analysis module.The output signal that signal analysis module receives signal conditioning module is filtered to measuring signal and enhanced processing；Signal is analyzed；It analyzes result and passes through display module real-time display.The detection device can realize contactless on-line checking, not interfere seeds fall, and check frequency is not present in loop sensor, and easy for installation, cheap, be suitable for agricultural automation to precision seeder working performance on-line checking.
Description
Technical field
The invention belongs to agricultural automation mechanical detection technical scope, in particular to a kind of precision based on electrostatic transducer
Feed mechanism for seed working performance on-line measuring device.
Background technique
The development of agricultural automation technology is to improve the important measures of crop yield and peasant income.Precise sowing technology
Appearance, improve sowing efficiency, saved human cost, be the importance of Agricultural Industrialization Development.Precision drill row
The performance parameter of kind of device directly influences the qualification rate of sowing, therefore is measured in real time and is particularly important to it.
Refer mainly to indicate qualified index, replay index, broadcast leakage index and the unit length for measuring precision seeder performance are broadcast
Kind amount.Presently, there are detection device used by method can be divided mainly into three classes: traditional sampling method, image method, photoelectric method.It passes
Sampling method of uniting needs to sample the Species structure of whereabouts, although relatively more accurate, intuitively, sampling is inconvenient, efficiency is lower, and
Offline inspection is without timeliness.Image method obtains seeds fall image using optical camera, by the detailed of seeds fall image
Seed size and seed pitch information are extracted in analysis, and this method result is also relatively more intuitive, but higher cost, and optical element is easy
It is polluted by site environment.Photoelectric method extracts seed sowing device performance parameter by detection pulse signal as caused by seeds fall, although
Its structure is simple, cheap, but there are check frequencies in the region that light-sensitive element does not cover, and optical transmission window is long-term
Measurement performance can be seriously affected using the pollution being subject to.
To overcome the shortcomings of that existing precision seeder detection device, the present invention propose a kind of precision based on electrostatic transducer
Feed mechanism for seed working performance on-line measuring device.Electrostatic transducer has more theoretical research and reality in industrial two-phase flow measurement
Basis is tested, and has been used at the scene.The invention belongs to contactless on-line checkings, do not interfere seeds fall, loop sensor is not
There are check frequencies, and structure is simple, cheap.
Summary of the invention
The purpose of the present invention is to propose to a kind of precision seeder working performance on-line measuring device based on electrostatic transducer,
It is characterized in that, the precision seeder performance online structure of the detecting device is the N endless metal by forming sensor probe 1
Electrode is embedded on the inner wall of precision seeder discharging tube, and along arranged in parallel with the vertical direction of seed movement, group is circularized
Metal electrode array 2 is drawn by coupled metal connection column 7, then passes through 4 phase of shielded cable 3 and signal conditioning module
Connection；4 connection signal analysis module 5 of signal conditioning module, signal analysis module 5 receive the output signal of signal conditioning module 4
Measuring signal is filtered and enhanced processing；Signal is analyzed；It analyzes result and passes through 6 real-time display of display module；Cause
This, which belongs to contactless on-line checking, does not interfere seeds fall, and loop sensor is blind there is no detecting
Area.
The main body of the electrostatic transducer probe is the stainless steel metal material of high mechanical strength, insertion precision seeder row
In kind pipe, internal geometric size is consistent with embedded precision seeder seeding bore.
The main part of the circular metal electrode array 2 and electrostatic transducer probe 1 is realized electrically by insulating materials 8
Isolation；Electrostatic transducer 1 main body of probe passes through interference of the earth shield external electromagnetic field to circular metal electrode array 2.
The radial thickness of N circular metal electrode of the composition sensor probe 1 is less than 5mm, axial width is less than
10mm；Centre distance between circular metal electrode is less than 50mm, and the distance between adjacent annular metal electrode is equal or not phase
Deng；N is 2-4.
The endless metal array 2 is combined by the circular metal electrode of identical or different width.
The signal analysis module 5 carries out time and frequency domain analysis to signal, obtains leakage sowing rate, the replay of precision seeder
Rate and seeding uniformity parameter obtain the sowing qualification rate of precision seeder using Data fusion technique, real-time by display module 6
Display.
The beneficial effects of the invention are as follows existing precision seeder detection device is overcome the shortcomings of, the present invention is with following special
Point:
It (1) can the accurate, broadcast leakage of continuous on-line detection precision seeder, replay, seeding uniformity and the intact feelings of seed
Condition.
(2) real-time parameter can be provided to the seeding process of automatic control, when there is continuous broadcast leakage, replay, need and
When shutdown inspection feed mechanism for seed；When occur planting it is uneven when, feed mechanism for seed seeding speed or seeder travel speed need to be adjusted in time；
When detecting the presence of the seed of damage, need to reseed in time.
(3) measurement of comparison of the multiple discharging tube performances of precision drill can be realized using multiple sensor probes.
(4) measurement method belongs to non-contact type on-line measurement, does not interfere seeds fall, there is no detections for loop sensor
Blind area, and it is easy for installation, cheap.
Detailed description of the invention
Fig. 1 is the precision seeder working performance on-line measuring device structural schematic diagram based on electrostatic transducer.
Fig. 2 a is the longitudinal section of sensor probe；Fig. 2 b is cross-sectional view at electrode.
In figure: 1- sensor probe；2- circular metal electrode array；3- shielded cable；4- signal conditioning module；5- signal
Analysis module；6- display module；7- metal connection column；8- wear-resisting insulating materials.
Fig. 3 is Performance Detection Device of Precision Seed-metering work flow diagram.
Fig. 4 is the correspondence diagram of the planting electrostatic signal that electrode detection arrives and feed mechanism for seed index, wherein (a) is positive
Normal seeds fall；It (b) is broadcast leakage；It (c) is replay；It (d) is normal seeding spacing；(e) less than normal for seeding spacing；It (f) is seeding
Spacing is bigger than normal；It (g) is normal planting frequency signal；(h) for seed, there are disrepair phenomenons.
Specific embodiment
The present invention provides a kind of precision seeder working performance on-line measuring device based on electrostatic transducer, below with reference to
Attached drawing is explained the present invention.
Fig. 1 show the precision seeder working performance on-line measuring device structural schematic diagram based on electrostatic transducer.Figure
In, the precision seeder performance online structure of the detecting device be by form sensor probe 1 N circular metal electrode (copper,
Nickel, stainless steel etc.) insertion precision seeder discharging tube inner wall on, and along arranged in parallel with the vertical direction of seed movement,
Circular metal electrode array 2 is formed, is drawn by coupled metal connection column 7, then passes through shielded cable 3 and signal condition
Module 4 is connected；4 connection signal analysis module 5 of signal conditioning module, signal analysis module 5 receive the defeated of signal conditioning module 4
Signal is filtered measuring signal and enhanced processing out；Signal is analyzed；It is aobvious in real time by display module 6 to analyze result
Show.
Sensor probe is the stainless steel and other metal materials with high mechanical strength, and precision seeder seeding is embedded in when use
Pipe, if discharging tube be metal material when can be connected by flange with precision seeder discharging tube, internal geometric size with it is embedded
The precision seeder seeding bore entered is consistent；Its 2 geometric identity of circular metal electrode array for being included, and edge and kind
The vertical direction of son movement is arranged in parallel；The other parts of circular metal electrode array 2 and sensor probe pass through insulating materials 8
It realizes electrical isolation, while outside electromagnetic interference is isolated using metallic shield；Its output signal is connect by coupled metal
Terminal 7 is drawn, and is connected to signal conditioning module 4 by shielded cable 3；Each circular metal electrode can independent measurement precision broadcast
Kind machine broadcast leakage and replay situation, multiple electrodes, which combine, can measure precision drill planting uniformity；Signal analysis module 5 is by dividing
The presence or absence of analysis planting electrostatic signal, strong and weak and relevance obtain the performance parameter of precision seeder, by comparing planting electrostatic
Precision seeder known to the presence or absence of signal whether broadcast leakage；By whether comparing precision seeder known to the power of planting electrostatic signal
Replay；It is whether uniform by comparing precision seeder planting known to the time interval of planting electrostatic signal；It is quiet by comparison planting
Whether institute's planting known to the frequency bandwidth of electric signal is damaged.Signal analysis module 5 carries out time and frequency domain analysis to signal, obtains
To the leakage sowing rate of precision seeder, replay rate and seeding uniformity parameter, precision seeder is obtained using Data fusion technique
Sow qualification rate.
Fig. 2 a is the longitudinal section of sensor probe；Fig. 2 b is cross-sectional view at electrode.Wherein, circular metal electrode array
The distance between middle metal electrode L be 0.2 to 50mm, the radial thickness of metal electrode is 0.1 to 5mm, axial width be 0.2 to
10mm；Electrostatic signal is drawn by the metal connection column 7 being connected directly with circular metal electrode array 2；Circular metal electrode battle array
Increase wear-resisting insulating materials 8 between column 2 and whereabouts seed.
Fig. 3 show Performance Detection Device of Precision Seed-metering work flow diagram.Signal analysis module 5 is quiet by analysis planting
The presence or absence of electric signal, strong and weak and relevance obtain the performance parameter of precision seeder.Pass through having for comparison planting electrostatic signal
Without known to precision seeder whether broadcast leakage；Power by comparing planting electrostatic signal knows whether precision seeder is replayed；It is logical
Whether uniform cross precision seeder planting known to the time interval of comparison planting electrostatic signal；Pass through comparison planting electrostatic signal
Whether institute's planting known to frequency bandwidth is damaged.
The correspondence diagram of planting electrostatic signal and precision seeder index that the electrode detection that Fig. 4 show arrives.Its
The detection of middle leakage sowing rate, replay rate and seed breakage rate can be detected by single electrode and be obtained, can also pass through multiple electrodes institute
It surveys Parameter fusion to obtain, but seeding uniformity detection needs at least two electrode measured signal operations to obtain.It is horizontal in Fig. 4 (a-f)
Coordinate representation time, ordinate indicate electrostatic signal size in time domain.When Fig. 4 (a) show normal seeds fall, single electrode
The electrostatic signal time domain waveform schematic diagram detected, amplitude are gradually increased with seed close to electrode, in reaching annular electrode
Reach peak value when heart cross section, and as seed is gradually reduced far from electrode.When electrode detection signal in similar (a), then
Precision seeder seeding is normal, when there was only reference signal in appearance (b) and without planting electrostatic signal or (c) in signal amplitude it is obvious
When bigger than normal, then there is broadcast leakage and resowing phenomenon respectively in precision seeder.When Fig. 4 (d) show precision seeder normal seeding,
The electrostatic signal detected on the fixed electrode of two axial distances is divided into Δ t between two electrostatic signal time to peaks, works as appearance
(e) in Δ t it is obvious less than normal or (f) in Δ t it is obviously bigger than normal when, then it is overstocked and sowed and dredge to there is sowing respectively for precision seeder
Phenomenon.When Fig. 4 (g) show precision seeder normal seeding, single electrode detects that electrostatic signal is obtained by frequency-domain analysis
Waveform diagram, when the obvious wide or frequency band of signal band is obviously narrow in appearance (h), then precision seeder institute seeding
There are disrepair phenomenons.
The present invention overcomes the shortcomings of existing precision seeder detection device as can be seen from the above；The present apparatus belongs to non-contact
Formula on-line checking does not interfere seeds fall, and check frequency is not present in loop sensor, and structure is simple, cheap.
Claims (3)
1. a kind of precision seeder working performance on-line measuring device based on electrostatic transducer, the precision seeder performance exist
Line detector be form sensor probe (1) N circular metal electrode insertion precision seeder discharging tube inner wall on, and
Along arranged in parallel with the vertical direction in seed movement direction, to form circular metal electrode array (2), which is characterized in that
Circular metal electrode array (2) is drawn by coupled metal connection column (7), then passes through shielded cable (3) and signal tune
Reason module (4) is connected；Signal conditioning module (4) connection signal analysis module (5), signal analysis module (5) receive signal tune
The output signal of reason module (4) is filtered to measuring signal and enhanced processing；Signal is analyzed；Obtain precision seeder
Leakage sowing rate, replay rate and seeding uniformity parameter, obtain the sowing qualification rate of precision seeder using Data fusion technique, by
Display module (6) real-time display；The circular metal electrode array (2) and the main part of electrostatic transducer probe (1) pass through
Insulating materials (8) realizes electrical isolation；Electrostatic transducer probe (1) main body is by earth shield external electromagnetic field to endless metal
The interference of electrod-array (2).
2. the precision seeder working performance on-line measuring device based on electrostatic transducer according to claim 1, feature
It is, electrostatic transducer probe (1) main body is the stainless steel metal material of high mechanical strength, is embedded in precision seeder seeding
Pipe, internal geometric size are consistent with embedded precision seeder seeding bore.
3. the precision seeder working performance on-line measuring device based on electrostatic transducer according to claim 1, feature
It is, the radial thickness of N circular metal electrode of composition sensor probe (1) is less than 5mm, axial width is less than
10mm；Centre distance between circular metal electrode is less than 50mm, and the distance between adjacent annular metal electrode is equal or not phase
Deng；N is 2-4.
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| CN201610225335.2A CN105758657B (en) | 2016-04-12 | 2016-04-12 | Precision seeder working performance on-line measuring device based on electrostatic transducer |
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| CN107389972B (en) * | 2017-07-18 | 2020-05-22 | 北京华电天仁电力控制技术有限公司 | Analyzer for on-line measuring boiler pipeline air-powder flow parameter |
| CN114966097B (en) * | 2022-04-26 | 2023-06-20 | 东南大学 | System and method for measuring flue gas flow velocity field based on invasive electrostatic sensor array |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101907634A (en) * | 2009-06-02 | 2010-12-08 | 中国农业机械化科学研究院 | Seeding quantity online measurement method and device of precision planter |
| CN103389117A (en) * | 2013-07-24 | 2013-11-13 | 华北电力大学 | On-line powder flowing measurement device and method based on array type static sensor |
| CN205719588U (en) * | 2016-04-12 | 2016-11-23 | 华北电力大学 | A kind of precision seeder service behaviour on-line measuring device based on electrostatic transducer |
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| JP4806851B2 (en) * | 2001-02-14 | 2011-11-02 | 井関農機株式会社 | Particulate matter detection device such as seeding machine |
| US8869629B2 (en) * | 2012-03-08 | 2014-10-28 | Cnh Industrial Canada, Ltd. | System and method for monitoring agricultural product delivery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907634A (en) * | 2009-06-02 | 2010-12-08 | 中国农业机械化科学研究院 | Seeding quantity online measurement method and device of precision planter |
| CN103389117A (en) * | 2013-07-24 | 2013-11-13 | 华北电力大学 | On-line powder flowing measurement device and method based on array type static sensor |
| CN205719588U (en) * | 2016-04-12 | 2016-11-23 | 华北电力大学 | A kind of precision seeder service behaviour on-line measuring device based on electrostatic transducer |
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