CN109931997A - A kind of seeding flow quantity detecting system and detection method - Google Patents
A kind of seeding flow quantity detecting system and detection method Download PDFInfo
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- CN109931997A CN109931997A CN201910167779.9A CN201910167779A CN109931997A CN 109931997 A CN109931997 A CN 109931997A CN 201910167779 A CN201910167779 A CN 201910167779A CN 109931997 A CN109931997 A CN 109931997A
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Abstract
The present invention provides a kind of seeding flow quantity detecting system and detection methods, including kind of stream reconfigured geometry, signal processing module and photoelectric sensor；Described kind of stream reconfigured geometry is located at seeder discharge port, for making seed by regular blanking；For whether measuring seed from described kind of stream reconfigured geometry outlet blanking, the signal processing module is used to convert planting grain number for the input signal of the photoelectric sensor sampled the photoelectric sensor.Described kind of stream reconfigured geometry includes discrete plate and sense channel；Described kind of stream reconfigured geometry outlet is equipped with several sense channels, is equipped with discrete plate inside described kind of stream reconfigured geometry, makes seed is evenly dispersed to enter in any sense channel；Photoelectric sensor is respectively mounted in each sense channel.Continuous, high density state seed stream can be separated into seed monomer by the present invention, and equably be fallen into each detection subchannel, detection error caused by reducing because of seed overlapping.
Description
Technical field
The present invention relates to agricultural mechanical field or farm electrification and informationization technology field, in particular to a kind of seeding
Flow quantity detecting system and detection method.
Background technique
Traditional seeder drives feed shaft by chain conveyer by land wheel, under actual condition, due to soil miriness, crop residue cover
The reasons such as rate height are accompanied by land wheel sliding phenomenon, cause replay, broadcast leakage.In view of the above-mentioned problems, some agricultural mechanical fields are ground
The person of studying carefully proposes the method for the amount of broadcasting intelligent control, the seeding flow based on Real-time Feedback, and actually the amount of broadcasting is constantly close default for control
Value eliminates replay, broadcast leakage, reduces the amount of the broadcasting coefficient of variation in unit distance.It is suitable that it guarantees that the key of feedback accuracy is to develop
The high-precision sensor for answering seed grain to detect.In addition, seeding flow sensor may also be combined with geographic position information system, generate
The amount of broadcasting prescription map assists the agronomy operating decisions such as subsequent irrigation, top dressing, harvest.
It currently, mainly include following three kinds for the sensor of seeding flow detection: piezoelectric type, condenser type and photo-electric.
Piezoelectric transducer antidusting is good, but may cause rebound after seed and piezoelectric membrane shock, leads to same seed repeated detection；
Capacitance type sensor is sensitive to seed grain number, can effectively differentiate the replay and broadcast leakage of seed, however its initial value can be with temperature
And change, cause monitoring error.
Photoelectric sensor is low in cost because it is quick on the draw, and is widely applied；When light beam is obstructed by seed, pass
Sensor output signal changes.It is the big seed crop of single grain fine sowing for seeding method, such as: corn, semen viciae fabae, detection are quasi-
True rate is higher；And for the drillings cereal such as wheat, rice, dynamics are continuous, compacted grains stream, normal in detection position
Overlap phenomenon, causes difficulty to accurate detection, routine monitoring sensor is only available for kind of a stream broken strip alarm, and minority is with stream
There is the defects of being unable to monitor overlapping seed in the sensor of amount detection function, can not be suitable for requiring feedback accuracy stringent intelligence
It can seeding monitoring system.
Summary of the invention
It in response to the deficiencies in the existing technology, can be with the present invention provides kind of seeding flow quantity detecting system and a detection method
Solve the problems, such as that seeding flow precisely detects.
The present invention achieves the above technical objects by the following technical means.
A kind of seeding flow quantity detecting system, including kind of stream reconfigured geometry, signal processing module and photoelectric sensor；Described kind
Stream reconfigured geometry is located at seeder discharge port, for making seed by regular blanking；The photoelectric sensor is used to measure seed
It is no to export blanking from described kind of stream reconfigured geometry, the photoelectric sensor of the signal processing module for that will sample it is defeated
Enter signal and is converted into planting grain number.
Further, described kind of stream reconfigured geometry includes discrete plate and sense channel；Described kind of stream reconfigured geometry outlet is equipped with
Several sense channels, described kind of stream reconfigured geometry inside are equipped with discrete plate, keep seed evenly dispersed logical into any detection
In road；Photoelectric sensor is respectively mounted in each sense channel.
Further, the discrete plate includes preceding discrete plate and rear discrete plate, according to seed inside described kind of stream reconfigured geometry
Flow direction be successively arranged preceding discrete plate and rear discrete plate；The preceding discrete plate and rear discrete plate surface are arc-shaped.
Further, the arc radius of the preceding discrete plate is 60-75mm, the arc axis and horizontal plane of the preceding discrete plate
Acute angle be 45-70 degree.
Further, the arc radius of the rear discrete plate is 75-100mm, the arc axis and level of the rear discrete plate
The acute angle 45-75 degree in face.
Further, the signal processing module includes signal scanning module, grain number identification module, grain number accumulator module and leads to
Interrogate module；
The signal scanning module successively scans the photoelectric sensor in several sense channels, and counts several inspections
Survey the output signal number of the photoelectric sensor in channel；
If the grain number identification module according to the output signal number of the photoelectric sensor in several sense channels and
Do photoelectric sensor in the sense channel whether output signal, logic judgment and the particle calculated in several sense channels are tired
Evaluation；
The summation of the particle aggregate-value in several sense channels is calculated by grain number accumulator module, by communication module by particle
Aggregate-value summing value is transported to display device.
A kind of seeding flow rate testing methods, include the following steps:
In the s times scanning, the signal scanning module successively scans the photoelectric sensor in several sense channels
Whether output signal, and count the i-th sense channel in photoelectric sensor output signal number；
The grain number identification module is secondary according to the output signal of the photoelectric sensor in the s times scanning in the i-th sense channel
Photoelectric sensor in number and the s time scanning in the i-th sense channel whether output signal, logic judgment and calculate the s times and scan
In particle aggregate-value in the i-th sense channel；
After the completion of scanning, the particle aggregate-value in the s times scanning in the i-th sense channel is asked by grain number accumulator module
With.
Further, the output signal number of the photoelectric sensor in the i-th sense channel is counted, specifically:
In the s times scanning, the signal scanning module successively scans the photoelectric sensor in several sense channels
Output end, when the i-th sense channel have seed stop light transmission, then the photoelectric sensor in the i-th sense channel output letter
Number, corresponding channel blocks number Ti sAdd 1；When the i-th sense channel shuts out the light without seed, then the photoelectricity in the i-th sense channel
The no signal of sensor exports, and corresponding channel blocks number Ti sIt remains unchanged, it may be assumed that
In formula: OPi sFor in the s times scanning, the output state of the i-th sense channel, low is no signal, high is to have signal；
Ti sFor in the s times scanning, the i-th sense channel blocks number.
Further, the grain number identification module blocks number T in the i-th sense channel according in the s times scanningi sWith s
Photoelectric sensor in secondary scanning in the i-th sense channel whether output signal, logic judgment and calculate in the s time scanning i-th and examine
The particle aggregate-value in channel is surveyed, specific as follows:
In formula: Ti sFor in the s times scanning, the i-th sense channel blocks number；
For the s times scanning in, the particle aggregate-value of the i-th sense channel；
For the s-1 times scanning in, the particle aggregate-value of the i-th sense channel；
TsFor grain count threshold value.
Further, the particle aggregate-value in the s times scanning in the i-th sense channel is summed by grain number accumulator module, tool
Body are as follows:
In formula:For each channel particulate accumulated value in the s times scanning；
For the s times scanning in, the particle aggregate-value of the i-th sense channel；
N is sense channel serial number maximum value.
The beneficial effects of the present invention are:
1. seeding flow quantity detecting system of the present invention can be incited somebody to action by the preceding discrete plate of arrangement, rear discrete hardened structure
Continuously, the seed stream of high density state is separated into seed monomer, and equably falls into each detection subchannel, reduces because seed is overlapped
Caused detection error.
2. seeding flow rate testing methods of the present invention, the number of whereabouts seed is judged by blocking the time, reduce by
In the test leakage phenomenon that more seeds are only accumulated once without interval whereabouts and are occurred, the detection essence being lifted under the conditions of big flow seeding
Degree.
Detailed description of the invention
Fig. 1 is seeding flow quantity detecting system scheme of installation of the present invention.
Fig. 2 is preceding discrete plate of the present invention, rear discrete plate structural schematic diagram.
Fig. 3 is seeder seeding flow rate testing methods control principle drawing of the present invention.
Fig. 4 is seeder seeding flow rate testing methods flow chart of the present invention.
In figure:
1- kind stream reconfigured geometry；It is suitable for reading that 11- enters kind；Discrete plate before 12-；Discrete plate after 13-；14- sense channel；15- letter
Number processing module；151- signal scanning module；152- grain number identification module；153- grain number accumulator module；154- communication module；
16- photoelectric sensor receiving end；17- photoelectric sensor transmitting terminal；18- sowing port；2- feed mechanism for seed；3- seed；4- light；5- row
Kind pipe.
Specific embodiment
Present invention will be further explained with reference to the attached drawings and specific examples, but protection scope of the present invention is simultaneously
It is without being limited thereto.
As shown in Figure 1, seeding flow quantity detecting system of the present invention, including kind of stream reconfigured geometry 1, signal processing module
15 and photoelectric sensor；Described kind of stream reconfigured geometry 1 is located at 2 discharge port of feed mechanism for seed, for making seed by regular blanking；The light
Whether electric transducer is for measuring seed from described kind of stream reconfigured geometry outlet blanking, and the signal processing module 15 will be for that will adopt
Sample to the input signal of the photoelectric sensor be converted into planting grain number.Described kind of stream reconfigured geometry 1 includes discrete plate and inspection
Survey channel 14；Described kind of stream reconfigured geometry outlet is equipped with several sense channels 14, is equipped with inside described kind of stream reconfigured geometry discrete
Plate makes seed is evenly dispersed to enter in any sense channel；Photoelectric sensor is respectively mounted in each sense channel 14
Receiving end 16 and photoelectric sensor transmitting terminal 17.The discrete plate includes preceding discrete plate 12 and rear discrete plate 13, described kind of stream weight
Flow direction inside structure structure 1 according to seed is successively arranged preceding discrete plate 12 and rear discrete plate 13, since the flow direction of seed is successively touched
Preceding discrete plate 12 and rear discrete plate 13 are hit, because discrete plate 12 and rear discrete plate 13 are generally interspersed before this；The preceding discrete plate
12 and rear discrete 13 surface of plate are arc-shaped, can be by the evenly dispersed sense channel 14 equal to width of seed 3.It is suitable for reading to enter kind
11 be kind of an import for stream reconfigured geometry 1, and seed 3 enters described kind of stream reconfigured geometry 1 by entering kind suitable for reading 11；Photoelectric sensor transmitting
Light 4 is projected at end 17, if stopping light 4 without seed 3, photoelectric sensor receiving end 16 receives light, and output is
Low level, if light 4 is blocked by seed 3, photoelectric sensor receiving end 16 if, exports high level, and signal processing module 15 is to each
Channel carries out scan round, and converts planting granule number for scanning result, when reaching scanning times, the planting that will test
Grain number is uploaded to display device.
As shown in Fig. 2, the preceding discrete plate 12 and rear discrete plate 13 are arc-shaped plate structure, emulated by discrete element
Test optimizes the discrete plate key structural parameters, and optimization method is that four factor response surface optimizations are tested, and described four
The arc radius of discrete plate 12 and inclination angle, the arc radius of rear discrete plate 13 and inclination angle before a influence factor is respectively as follows:；When initial
Forward and backward discrete plate radius is respectively 20 to 100 millimeters, 60 to 200 millimeters, beyond above-mentioned radius to discrete effect shadow
Sound is not significant, therefore above-mentioned section is selected to optimize forward and backward discrete plate；Initial forward and backward discrete plate inclination angle be respectively 90 to
180 degree, 0 to 90 degree, can not come into full contact with if discrete plate inclination angle is beyond above range with seed；RF is preceding discrete plate 12 in figure
Optimal radius range, result is 60 to 75 millimeters, and IF is the optimal of arc axis and the horizontal direction angle of preceding discrete plate 12
Range, result are 45 to 70 degree, and the rear discrete 13 optimal value interval of radius RR of plate is 75 to 120 millimeters, rear discrete plate 13
Arc axis and the optimal value interval of horizontal direction inclination angle IR are 45 to 75 degree.Shown in Fig. 2, the circular arc half of the preceding discrete plate 12
Diameter is 60-75mm, and the arc axis of the preceding discrete plate 12 and the acute angle of horizontal plane are 45-70 degree.Discrete plate after described
13 arc radius is 75-100mm, the rear arc axis of discrete plate 13 and the acute angle 45-75 degree of horizontal plane.
As shown in figure 3, the signal processing module 15 includes signal scanning module 151, grain number identification module 152, grain number
Accumulator module 153 and communication module 154；The signal scanning module 151 successively scans the light in several sense channels 14
Electric transducer, and count the output signal number of the photoelectric sensor in several sense channels 14；The grain number identification module
In the 152 output signal number and several sense channels 14 according to the photoelectric sensor in several sense channels 14
Photoelectric sensor whether output signal, logic judgment and calculate the particle aggregate-value in several sense channels 14；It is tired by grain number
Add module 153 to calculate the particle aggregate-value summation in several sense channels 14, particle aggregate-value is summed by communication module 154
Value is transported to display device.The transmission mode of the communication module 154 and display device is 2.4GHz wireless telecommunications.
As shown in figure 4, seeding flow rate testing methods of the present invention, include the following steps:
S01: in the s times scanning, the signal scanning module 151 successively scans the light in several sense channels 14
Electric transducer whether output signal, and count the i-th sense channel 14 in photoelectric sensor output signal number, specifically
Are as follows:
In the s times scanning, the signal scanning module 151 successively scans the photoelectric transfer in several sense channels 14
The output end of sensor, when the i-th sense channel 14 has seed to stop light transmission, the then photoelectric sensor in the i-th sense channel 14
Output signal, corresponding channel blocks number Ti sAdd 1；When the i-th sense channel 14 shuts out the light without seed, then the i-th detection is logical
The no signal of photoelectric sensor in road 14 exports, and corresponding channel blocks number Ti sIt remains unchanged, it may be assumed that
In formula: OPi sFor in the s times scanning, the output state of the i-th sense channel, low is no signal, high is to have signal；
Ti sFor in the s times scanning, the i-th sense channel blocks number.
S02: the grain number identification module 152 is defeated according to the photoelectric sensor in the s times scanning in the i-th sense channel 14
Out the photoelectric sensor in signal number and the s times scanning in the i-th sense channel 14 whether output signal, logic judgment and calculating
Particle aggregate-value in the s times scanning in the i-th sense channel 14；It is specific as follows:
In formula: Ti sFor in the s times scanning, the i-th sense channel blocks number；
For the s times scanning in, the particle aggregate-value of the i-th sense channel；
For the s-1 times scanning in, the particle aggregate-value of the i-th sense channel；
TsFor grain count threshold value, grain count threshold value TsIt is 2.
After determining to complete in the s times scanning to the grain number identification module 152, work as OPi sWhen=low, meter will be blocked
Numerical value Ti sClear 0；Work as OPi sWhen=high, Ti sUnclear 0；It is reactivated when waiting scanning next time.
S03: if Current Scan channel position i is less than the sense channel sum N, scanning i+1 sense channel,
Otherwise No. 1 sense channel is returned, scan round next time is started；
S04: after the completion of scanning, i.e. s is greater than the SP value of setting, by grain number accumulator module 153 will scan for the s time in the
Particle aggregate-value summation in i sense channel 14.Specifically:
In formula:For each channel particulate accumulated value in the s times scanning；
For the s times scanning in, the particle aggregate-value of the i-th sense channel；
N is sense channel serial number maximum value.
Specific embodiment 1: this embodiment device length is respectively 103,100 and 118 millimeters, and it is straight to enter kind suitable for reading 11
Diameter is 38 millimeters, and entering kind suitable for reading 11 with horizontal direction inclination angle is 60 degree.Preceding 12 radius of discrete plate is 69.8 millimeters；Preceding discrete plate 12
Arc axis and horizontal direction inclination angle be 54.87 degree.Discrete 13 radius of plate is 85.39 millimeters afterwards, the circular arc of rear discrete plate 13
Axis and horizontal direction inclination angle are 55.61 degree, and detection subchannel number is 11, and each width is 7 millimeters；Experience confirmatory test,
Detection accuracy is as follows: when seeding flow is about 50/second, and test period is 5 seconds, in triplicate, Detection accuracy difference
Are as follows: 98.79%, 95.02%, 97.81%；When seeding flow flow is 75/second, test period is 5 seconds, in triplicate,
Detection accuracy is respectively as follows: 95.56%, 95.97%, 98.77%；When seeding flow flow is 100/second, test period 5
Second, in triplicate, Detection accuracy is respectively as follows: 96.59%, 97.94%, 99.81%；When seeding flow flow be 125/
Second, test period is 5 seconds, and in triplicate, Detection accuracy is respectively as follows: 99.96%, 99.78%, 99.71%；When seeding stream
Amount flow is 185/second, and test period is 5 seconds, and in triplicate, Detection accuracy is respectively as follows: 95.63%, 99.66%,
99.31%；
Discrete 12 radius of plate is 20mm before embodiment, and the arc axis and level inclination of preceding discrete plate 12 are 50 degree；
Discrete plate radius is that 66.5mm carries out simulation analysis when the arc axis of rear discrete plate 13 and horizontal direction inclination angle are 45 degree afterwards,
If two seeds fall into same channel simultaneously or single seed falls into less than one inspection of grid time identical with detection light line width
Survey period, that is, 2.65ms, then it is assumed that seed is not detected.Its detection accuracy is as follows: when seeding flow is about 50/second, when test
Between be 5 seconds when, in triplicate, Detection accuracy is respectively as follows: 87.71%, 85.62%, 87.17%；When seeding flow flow
For 75/second, test period is 5 seconds, and in triplicate, Detection accuracy is respectively as follows: 81.90%, 75.55%, 78.17%；
When seeding flow flow is 100/second, test period is 5 seconds, and in triplicate, Detection accuracy is respectively as follows: 76.55%,
77.43%, 79.27%；When seeding flow flow is 125/second, test period is 5 seconds, in triplicate, Detection accuracy
It is respectively as follows: 70.16%, 74.89%, 79.14%；When seeding flow flow is 185/second, test period is 5 seconds, repeats three
Secondary, Detection accuracy is respectively as follows: 75.93%, 70.16%, 71.59%；Therefore the arc radius of the preceding discrete plate 12 is
60-75mm, the arc axis of the preceding discrete plate 12 and the acute angle of horizontal plane are 45-70 degree.Discrete plate 13 after described
Arc radius is 75-100mm, the rear arc axis of discrete plate 13 and the acute angle 45-75 degree of horizontal plane.
The embodiment is a preferred embodiment of the present invention, but present invention is not limited to the embodiments described above, not
In the case where substantive content of the invention, any conspicuous improvement that those skilled in the art can make, replacement
Or modification all belongs to the scope of protection of the present invention.
Claims (10)
1. a kind of seeding flow quantity detecting system, which is characterized in that including kind stream reconfigured geometry (1), signal processing module (15) and
Photoelectric sensor；Described kind of stream reconfigured geometry (1) is located at feed mechanism for seed (2) discharge port, for making seed by regular blanking；The light
For electric transducer for whether measuring seed from described kind of stream reconfigured geometry outlet blanking, the signal processing module (15) is used for will
The input signal of the photoelectric sensor sampled is converted into planting grain number.
2. seeding flow quantity detecting system according to claim 1, which is characterized in that described kind of stream reconfigured geometry includes discrete
Plate and sense channel (14)；Described kind of stream reconfigured geometry outlet is equipped with several sense channels (14), in described kind of stream reconfigured geometry
Portion is equipped with discrete plate, makes seed is evenly dispersed to enter in any sense channel；Pacify in each sense channel (14)
Fill photoelectric sensor.
3. seeding flow quantity detecting system according to claim 2, which is characterized in that the discrete plate includes preceding discrete plate
(12) and rear discrete plate (13) before, being successively arranged inside described kind of stream reconfigured geometry according to the flow direction of seed discrete plate (12) and after
Discrete plate (13)；The preceding discrete plate (12) and rear discrete plate (13) surface are arc-shaped.
4. seeding flow quantity detecting system according to claim 3, which is characterized in that the circular arc of the preceding discrete plate (12) half
Diameter is 60-75mm, and the arc axis of the preceding discrete plate (12) and the acute angle of horizontal plane are 45-70 degree.
5. seeding flow quantity detecting system according to claim 3, which is characterized in that the circular arc of discrete plate (13) half after described
Diameter is 75-100mm, the rear arc axis of discrete plate (13) and the acute angle 45-75 degree of horizontal plane.
6. seeding flow quantity detecting system according to claim 2, which is characterized in that the signal processing module (15) includes
Signal scanning module (151), grain number identification module (152), grain number accumulator module (153) and communication module (154)；
The signal scanning module (151) successively scans the photoelectric sensor in several sense channels (14), and counts
The output signal number of photoelectric sensor in several sense channels (14)；
The grain number identification module (152) is according to the output signal number of the photoelectric sensor in several sense channels (14)
With the photoelectric sensor in several sense channels (14) whether output signal, logic judgment and calculate several sense channels
(14) the particle aggregate-value in；
The particle aggregate-value summation in several sense channels (14) is calculated by grain number accumulator module (153), passes through communication module
(154) particle aggregate-value summing value is transported to display device.
7. a kind of seeding flow rate testing methods according to claim 1-6, which is characterized in that including walking as follows
It is rapid:
In the s times scanning, the signal scanning module (151) successively scans the photoelectric transfer in several sense channels (14)
Sensor whether output signal, and count the i-th sense channel (14) in photoelectric sensor output signal number；
The grain number identification module (152) is believed according to the output of the photoelectric sensor in the s times scanning in the i-th sense channel (14)
Photoelectric sensor in number number and the s times scanning in the i-th sense channel (14) whether output signal, logic judgment and calculate the
Particle aggregate-value in s scanning in the i-th sense channel (14)；
It is by grain number accumulator module (153) that the particle in the s times scanning in the i-th sense channel (14) is tired after the completion of scanning
Evaluation summation.
8. seeding flow rate testing methods according to claim 7, which is characterized in that in statistics the i-th sense channel (14)
The output signal number of photoelectric sensor, specifically:
In the s times scanning, the signal scanning module (151) successively scans the photoelectric transfer in several sense channels (14)
The output end of sensor, when the i-th sense channel (14) has seed to stop light transmission, the then photoelectric transfer in the i-th sense channel (14)
The output signal of sensor, corresponding channel block number Ti sAdd 1；When the i-th sense channel (14) shuts out the light without seed, then i-th
The no signal of photoelectric sensor in sense channel (14) exports, and corresponding channel blocks number Ti sIt remains unchanged, it may be assumed that
In formula:For in the s times scanning, the output state of the i-th sense channel, low is no signal, high is to have signal；
Ti sFor in the s times scanning, the i-th sense channel blocks number.
9. seeding flow rate testing methods according to claim 8, which is characterized in that grain number identification module (152) root
Number T is blocked according in the i-th sense channel (14) in the s times scanningi sWith the light in the s times scanning in the i-th sense channel (14)
Electric transducer whether output signal, logic judgment and calculate the particle aggregate-value in scanned for the s time in i-th sense channel (14),
It is specific as follows:
In formula: Ti sFor in the s times scanning, the i-th sense channel blocks number；
For the s times scanning in, the particle aggregate-value of the i-th sense channel；
For the s-1 times scanning in, the particle aggregate-value of the i-th sense channel；
TsFor grain count threshold value.
10. seeding flow rate testing methods according to claim 9, which is characterized in that will by grain number accumulator module (153)
Particle aggregate-value summation in the s times scanning in the i-th sense channel (14), specifically:
In formula:For each channel particulate accumulated value in the s times scanning；
For the s times scanning in, the particle aggregate-value of the i-th sense channel；
N is sense channel serial number maximum value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910167779.9A CN109931997B (en) | 2019-03-06 | 2019-03-06 | Seed metering flow detection system and detection method |
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| CN201910167779.9A CN109931997B (en) | 2019-03-06 | 2019-03-06 | Seed metering flow detection system and detection method |
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| CN109931997B (en) | 2020-11-20 |
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