CN103808366A - Seeding monitoring method, device and system based on wheat seeder - Google Patents
Seeding monitoring method, device and system based on wheat seeder Download PDFInfo
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- CN103808366A CN103808366A CN201410058717.1A CN201410058717A CN103808366A CN 103808366 A CN103808366 A CN 103808366A CN 201410058717 A CN201410058717 A CN 201410058717A CN 103808366 A CN103808366 A CN 103808366A
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Abstract
The invention relates to a seeding monitoring method based on a wheat seeder. The method includes the following detailed steps that (1), an analog voltage signal and land wheel speed data are collected; (2) the analog voltage signal is analyzed according to feature information of the analog voltage signal; (3) the seeding state is determined according to the analyzed feature information of the analog voltage signal and the land wheel speed data. According to the method, a high-power infrared photoelectric seeding sensor is used, the seeding sensor directly outputs the analog voltage signal, a single chip microcomputer is used for collecting the voltage signal, a state judgment algorithm is designed according to features of voltage, voltage change, and continuity and discontinuity of wheat sowing in line, the defect of poor anti-dusting performance of a photoelectric monitoring device is overcome, three seeding states such as normal state, blocking state and blank pipe state can be well monitored, real-time performance and accuracy can be considered simultaneously, and miss-seeding can be timely and accurately discovered. The invention further discloses a seeding monitoring device and system based on the wheat seeder.
Description
Technical field
The present invention relates to computing machine agricultural technology field, relate in particular to a kind of seeding detection method, Apparatus and system based on wheat seeder.
Background technology
When wheat seeder carries out seeding operation, usually there will be kind of case to lack the faults such as kind, seeding chain drive fault, plough obstruction, discharging tube obstruction, cause broadcast leakage phenomenon, cause crop production reduction.In order to find in time broadcast leakage phenomenon, conventional monitoring method has personal monitoring's method and photoelectric sensor monitoring method.Personal monitoring's method needs two people to stand on seeder, observes each discharging tube situation of sowing, but the flow process of seed is totally enclosed during due to sowing, only relies on people's vision, the sense of hearing cannot promptly and accurately find broadcast leakage phenomenon.Meanwhile, the labour intensity of personal monitoring's method is very large, often occurs the danger that people falls from seeder.
Further, whether existing seeding monitoring device generally can only monitor discharging tube and stop up, what, driving chain fault emptying for kind of case, feed mechanism for seed card type, land wheel skidded etc. and to cause does not sow, and discharging tube empty pipe condition can not be monitored well, can not monitor all sidedly broadcast leakage.
Photo-electric wheat cultivation monitoring device is easily subject to field dust impact at present, and Antidust capability is poor.Field dust can be attached on luminotron and receiving tube, and receiving tube receiving light power is declined, and when dust accumulation is to a certain extent time, the variation of receiving light power and receiving light power can be less than judgment threshold, thereby causes false alarm phenomenon.In order to reduce false alarm, to improve monitoring accuracy, need to increase the collecting sensor signal time, thereby cause monitoring device real-time poor, warning hysteresis quality is obvious, cannot, to abnormality and alarm, can not find in time broadcast leakage.
In addition, existing wheat cultivation monitoring device versatility is poor, the scope of application is wideless, only can be applied to the seeder of specific model or line number, can not be applied to neatly different seeders.
Summary of the invention
Technical matters to be solved by this invention is the problem that how to overcome existing wheat cultivation monitoring broadcast leakage phenomenon.
For this purpose, the present invention proposes a kind of seeding detection method based on wheat seeder, comprise concrete following steps:
S1: gather analog voltage signal and land wheel speed data, wherein, described analog voltage signal is exported by sowing sensor, and described land wheel speed data is obtained by ground-speed sensor;
S2: according to the characteristic information of described analog voltage signal, described analog voltage signal is analyzed, wherein, described characteristic information comprises magnitude of voltage, change in voltage and drilling continuity, the discontinuity state of described analog voltage signal;
S3: sow condition judgement according to the described characteristic information of the analog voltage signal after described analysis and described land wheel speed data.
Further, described step S3 specifically comprises:
S31: the described analog voltage signal of sowing sensor output described in multi collect;
S32: the described analog voltage signal collecting is carried out to low-pass filtering operation;
S33: the magnitude of voltage of the multiple described analog voltage signals that collect and occlusion threshold are compared;
S34: described in more than 50% image data of the magnitude of voltage of multiple described analog voltage signals of collecting be more than or equal to described occlusion threshold, carry out maximal value filtering algorithm;
S35: obtain the maximum difference of the magnitude of voltage of multiple described analog voltage signals by described maximal value filtering algorithm, be the maximum variable quantity of signal;
S36: if the maximum variable quantity of described signal is greater than blank pipe threshold value, recording status is larger for changing, if the maximum variable quantity of described signal is less than blank pipe threshold value, recording status is less for changing.
Further, after described S33, also comprise step: if more than 50% image data of the magnitude of voltage of the multiple described analog voltage signals that collect is less than described occlusion threshold, judge that wheat cultivation state is as stopping up.
Further, described S36 further comprises: if described recording status is to change larger read-around ratio to drop in preset times threshold value, judge that sowing state is as normal, if described recording status is to change less read-around ratio to drop in described preset times threshold value, judge that sowing state is as blank pipe.
The invention allows for a kind of seeding monitoring device based on wheat seeder, comprising:
Acquisition module, for gathering analog voltage signal and land wheel speed data, wherein, described analog voltage signal is exported by sowing sensor, and described land wheel speed data is obtained by ground-speed sensor;
Analysis module, for described analog voltage signal being analyzed according to the characteristic information of described analog voltage signal, wherein, described characteristic information comprises magnitude of voltage, change in voltage and drilling continuity, the discontinuity state of described analog voltage signal;
Condition judgement module, for sowing condition judgement according to the described characteristic information of the analog voltage signal after described analysis and described land wheel speed data.
Further, described condition judgement module also comprises:
Collecting unit, for sowing the described analog voltage signal of sensor output described in multi collect;
Low-pass filtering operation unit, for carrying out low-pass filtering operation to the described analog voltage signal collecting;
Comparing unit, for comparing the magnitude of voltage of the multiple described analog voltage signals that collect and occlusion threshold;
Maximal value filtering algorithm performance element, the image data for the magnitude of voltage of the described multiple described analog voltage signals that collect more than 50% is more than or equal to described occlusion threshold, carries out maximal value filtering algorithm;
Acquiring unit, for obtain the maximum difference of the magnitude of voltage of multiple described analog voltage signals by described maximal value filtering algorithm, is the maximum variable quantity of signal;
Condition judgement unit, if be greater than blank pipe threshold value for the maximum variable quantity of described signal, recording status is larger for changing, if the maximum variable quantity of described signal is less than blank pipe threshold value, recording status is less for changing.
Further, if described condition judgement unit is also for the magnitude of voltage of multiple described analog voltage signals of collecting, more than 50% image data is less than described occlusion threshold, judges that wheat cultivation state is as stopping up.
Further, if described condition judgement unit is also to change larger read-around ratio to drop in preset times threshold value for described recording status, judge that sowing state is as normal, if described recording status is to change less read-around ratio to drop in described preset times threshold value, judge that sowing state is as blank pipe.
The invention allows for a kind of seeding detection system based on wheat seeder, comprising: this system comprises the device described in claim 5-8 any one item, described sowing sensor, described ground-speed sensor and car-mounted terminal.
Particularly, between the device described in described claim 5-8 any one and described car-mounted terminal, adopt CAN bus distributed structure.
Particularly, the device described in described car-mounted terminal and described claim 5-8 any one is by the join described land wheel speed data of the described analog voltage signal and the described ground-speed sensor that obtain described sowing sensor of CAN connecting line.
Particularly, described car-mounted terminal has parameter setting function.
Particularly, described sowing sensor adopts powerful infrarede emitting diode as luminotron, adopts powerful infrared electro triode as receiving tube.
Particularly, the described land wheel speed data of described ground-speed sensor collection realizes parking automatic closing and alarm as warning overhead control signal.
By adopting a kind of disclosed seeding detection method based on wheat seeder of the present invention, device and system, the present invention adopts Infrared High-Power photo-electric sowing sensor, sowing sensor is directly exported analog voltage signal, gather voltage signal with single-chip microcomputer, according to voltage, change in voltage and wheat drilling continuity, the feature of discontinuity, design point evaluation algorithm, overcome the poor defect of photo-electric monitoring device Antidust capability, can monitor well normal, stop up, three kinds of sowing states of blank pipe, and take into account real-time and accuracy, can find timely and accurately broadcast leakage.
Accompanying drawing explanation
Can more clearly understand the features and advantages of the present invention by reference to accompanying drawing, accompanying drawing is schematically to should not be construed as the present invention is carried out to any restriction, in the accompanying drawings:
Fig. 1 shows the flow chart of steps of a kind of seeding detection method based on wheat seeder in the embodiment of the present invention;
Fig. 2 shows the continuous and discontinuous property of wheat drilling schematic diagram;
Fig. 3 shows the structural drawing of a kind of seeding monitoring device based on wheat seeder in the embodiment of the present invention;
Fig. 4 shows the hardware structure diagram of a kind of seeding monitoring device based on wheat seeder in the embodiment of the present invention;
Fig. 5 shows the structural drawing of a kind of seeding detection system based on wheat seeder in the embodiment of the present invention;
Fig. 6 shows CAN bus distributed structure figure;
Fig. 7 shows the installation example figure of a kind of seeding detection system based on wheat seeder in the embodiment of the present invention;
The car-mounted terminal that Fig. 8 shows in the embodiment of the present invention arranges interface schematic diagram;
Fig. 9 shows the car-mounted terminal display interface schematic diagram in the embodiment of the present invention;
Figure 10 shows the capable interface schematic diagram that arranges of car-mounted terminal in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention is described in detail.
As shown in Figure 1, the invention provides a kind of seeding detection method based on wheat seeder, comprise concrete following steps:
Step S1: gather analog voltage signal and land wheel speed data, wherein, analog voltage signal is exported by sowing sensor, and land wheel speed data is obtained by ground-speed sensor.
Step S2: according to the characteristic information of analog voltage signal, analog voltage signal is analyzed, wherein, characteristic information comprises magnitude of voltage, change in voltage and drilling continuity, the discontinuity state of analog voltage signal.
Step S3: sow condition judgement according to characteristic information and the land wheel speed data of the analog voltage signal after analyzing.
Further, step S3 specifically comprises:
Step S31: the analog voltage signal of multi collect sowing sensor output.
Step S32: the analog voltage signal collecting is carried out to low-pass filtering operation.
Step S33: the magnitude of voltage of the multiple analog voltage signals that collect and occlusion threshold are compared.
Step S34: more than 50% image data of the magnitude of voltage of the multiple analog voltage signals that collect is more than or equal to occlusion threshold, carries out maximal value filtering algorithm.
Step S35: obtain the maximum difference of the magnitude of voltage of multiple analog voltage signals by maximal value filtering algorithm, be the maximum variable quantity of signal.
Step S36: if the maximum variable quantity of signal is greater than blank pipe threshold value, recording status is larger for changing, if the maximum variable quantity of signal is less than blank pipe threshold value, recording status is less for changing.
Further, after step 33, also comprise step: if more than 50% image data of the magnitude of voltage of the multiple analog voltage signals that collect is less than occlusion threshold, judge that wheat cultivation state is as stopping up.
Further, step S36 further comprises: if recording status is to change larger read-around ratio to drop in preset times threshold value, judge that sowing state is as normal, if recording status is to change less read-around ratio to drop in preset times threshold value, judge that sowing state is as blank pipe.
Further, multi collect sowing sensor signal, the magnitude of voltage of each analog voltage signal gathering is designated as U
i(1≤i≤N), carries out low-pass filtering to the voltage signal gathering, and judges whether N magnitude of voltage has the half of exceeding to be all less than occlusion threshold U
stop up, if so, sowing state, for stopping up, finishes this next state judgement, if not, carries out maximal value filtering algorithm, obtains the maximum difference Δ U of N magnitude of voltage
max, i.e. the maximum variable quantity of signal.
Further, because dust volume is much smaller than the volume of wheat seed, if therefore large (the Δ U of change amount signal
max>U
blank pipe), recording status is larger for changing; If less (the Δ U of change amount signal
max<U
blank pipe), recording status is less for changing.Because wheat bar broadcast mode exists continuous and discontinuously, as shown in Figure 2, in one section of seed flow, signal is continuous variation, and changes larger; At the interval of every section of seed flow, signal intensity is very little.If therefore large (the Δ U of change amount signal
max>U
blank pipe), and the interior variation of preset times threshold value is all larger continuously, and sowing state is normal; If less (the Δ U of change amount signal
max<U
blank pipe), and change in preset times threshold value continuously all littlely, sowing state is blank pipe, there is no seeds fall, the reason of change in voltage may be by being that dust causes.Wherein, prediction frequency threshold value is [5,20].
As Fig. 3 shows the structural drawing of a kind of seeding monitoring device based on wheat seeder in the embodiment of the present invention.
Particularly, the seeding monitoring device 10 based on wheat seeder comprises: acquisition module 101, analysis module 102 and condition judgement module 103.
Further, acquisition module 101 is for gathering analog voltage signal and land wheel speed data, and wherein, analog voltage signal is exported by sowing sensor, and described land wheel speed data is obtained by ground-speed sensor.
Analysis module 102 is analyzed analog voltage signal for the characteristic information according to analog voltage signal, and wherein, characteristic information comprises magnitude of voltage, change in voltage and drilling continuity, the discontinuity state of analog voltage signal.
Condition judgement module 103 is for sowing condition judgement according to characteristic information and the land wheel speed data of the analog voltage signal after analyzing.
Further, condition judgement module 103 also comprises: collecting unit, low-pass filtering operation unit, comparing unit, maximal value filtering algorithm performance element, acquiring unit and condition judgement unit.
Particularly, collecting unit is for the analog voltage signal of multi collect sowing sensor output; Low-pass filtering operation unit is for carrying out low-pass filtering operation to the analog voltage signal collecting; Comparing unit is for comparing the magnitude of voltage of the multiple analog voltage signals that collect and occlusion threshold; For the magnitude of voltage of multiple analog voltage signals of collecting, more than 50% image data is more than or equal to occlusion threshold to maximal value filtering algorithm performance element, carries out maximal value filtering algorithm; Acquiring unit, for obtain the maximum difference of the magnitude of voltage of multiple analog voltage signals by maximal value filtering algorithm, is the maximum variable quantity of signal; If condition judgement unit is greater than blank pipe threshold value for the maximum variable quantity of signal, recording status is larger for changing, if the maximum variable quantity of signal is less than blank pipe threshold value, recording status is less for changing.
Further, if condition judgement unit is also for the magnitude of voltage of multiple analog voltage signals of collecting, more than 50% image data is less than occlusion threshold, judges that wheat cultivation state is as stopping up.
Further, if condition judgement unit is also to change larger read-around ratio to drop in preset times threshold value for recording status, judge that sowing state is as normal, if recording status is to change less read-around ratio to drop in preset times threshold value, judge that sowing state is as blank pipe.
As Fig. 4 shows the hardware structure diagram of a kind of seeding monitoring device based on wheat seeder in the embodiment of the present invention.
Particularly, 12 tunnel sowing sensor signals are linked into the corresponding port of analog switch CD4067, controlling master controller AT90CAN128 comprises: I/O port, CAN controller, ADC collection, interruption and timer, which sowing sensor output signal the port of controlling primary controller AT90CAN128 can gather by gating.After pick-up transducers output signal, by sowing state evaluation algorithm, obtain the sowing state of each row.Use the method for external interrupt and timer, gather ground velocity sensor signal, process the land wheel speed that obtains.Then by the sowing state obtaining and land wheel speed, report by CAN bus.
As Fig. 5 shows the structural drawing of a kind of seeding detection system based on wheat seeder in the embodiment of the present invention.
Particularly, the seeding detection system 20 based on wheat seeder comprises: this system comprises the disclosed seeding monitoring device 10 based on wheat seeder in above-described embodiment, sowing sensor 30, ground-speed sensor 40 and car-mounted terminal 50.
Further, between the disclosed seeding monitoring device 10 based on wheat seeder of above-described embodiment and car-mounted terminal 50, adopt CAN bus distributed structure.Described CAN bus distributed structure figure is shown in Fig. 6.
Particularly, in above-described embodiment, the disclosed seeding monitoring device 10 based on wheat seeder is connected by CAN bus with car-mounted terminal 50, in above-described embodiment, the disclosed seeding monitoring device 10 based on wheat seeder is as the data acquisition node of CAN bus, gather sowing sensor 30 and ground-speed sensor 40 data, after finishing dealing with, the sowing state of each row and land wheel speed are reported to car-mounted terminal 50.Car-mounted terminal 50 is as controlling nodes, can control the disclosed seeding monitoring device 10 based on wheat seeder in above-described embodiment and gather, report the sowing state of which row, controls sowing state and judges parameter value size.120 Europe terminal resistances are accessed respectively at CAN bus two ends, improve the anti-interference of communication.For 1～12 row wheat seeder, in CAN bus, need to articulate a car-mounted terminal and a monitoring modular; 13～24 row seeders, only need to increase the disclosed seeding monitoring device 10 based on wheat seeder in an above-described embodiment, and change seeder line number into analog value in terminal.As line number continues to increase, the rest may be inferred.
Further, the employing of this structure can realize easily dissimilar wheat seeder is monitored, and makes the disclosed seeding monitoring device 10 based on wheat seeder in above-described embodiment can be applicable to neatly the dissimilar seeders such as 12 row, 24 row, 48 row.
Further, sowing sensor 30 adopts powerful infrarede emitting diode as luminotron, adopts powerful infrared electro triode as receiving tube.This structure can reduce the impact of dust, is conducive to the monitoring of the state of sowing, and sows sensor 30 and export analog voltage signal, and after seeding operation a period of time, signal can be again because dust impact decline.
Further, the land wheel speed data that ground-speed sensor 40 gathers realizes parking automatic closing and alarm as warning overhead control signal.Wherein, the land wheel speed data of ground-speed sensor collection realizes parking automatic closing and alarm as warning overhead control signal, and wherein, the mode of warning is but is not limited to report to the police by the mode of sound prompting or flash of light.
Further, car-mounted terminal 50 is joined and is obtained the sowing analog voltage signal of sensor 30 and the land wheel speed data of ground-speed sensor 40 by CAN connecting line with the disclosed seeding monitoring device 10 based on wheat seeder of above-described embodiment; Car-mounted terminal 50 has parameter setting function; Particularly, car-mounted terminal 50 is for obtaining the sowing analog voltage signal of sensor and the land wheel speed data of ground-speed sensor by CAN connecting line, and car-mounted terminal 50 has parameter setting function neatly, be applicable to different regions, Various Seasonal, dissimilar seeder and different work condition; Adopt and graphically show visually sowing state, facilitate agricultural bank to watch.
As shown in Figure 7, the installation example figure of a kind of seeding detection system based on wheat seeder in the embodiment of the present invention.
Particularly, take 24 row wheat seeders as example, sowing sensor (9), ground-speed sensor (10), monitoring device (7), car-mounted terminal (4).
Further, sowing sensor (9) is arranged on the discharging tube of feed mechanism for seed (8) below, every a line of seeder (6) need to be installed a sowing sensor (9), and sowing sensor (9) is linked into monitoring device (7) by sensor connecting line (12); Monitoring device (7) is arranged between tractor (1) and seeder (6), and each monitoring device (7) can connect 12 sowing sensors (9); Ground-speed sensor (10) is arranged near land wheel (11), and is linked in monitoring device (7) by sensor connecting line (12); It is indoor that car-mounted terminal (4) is arranged on tractor driving, is connected with monitoring device (7) by CAN connecting line (5), connects tractor accumulator (2) power supply by power lead (3).
Sowing sensor (9) adopts the mode of output analog voltage signal, and under difference sowing state, output signal shows as: when obstruction, and sowing sensor output LOW voltage; When blank pipe, sowing sensor output HIGH voltage; When normal sowing, the voltage signal of sowing sensor exporting change, simultaneously, sowing sensor (9) adopts powerful infrarede emitting diode as luminotron, adopt powerful infrared electro triode as receiving tube, can make under empty pipe condition signal output under high voltage, blocked state, signal output at small voltage very, reduce the impact of dust, be conducive to the monitoring of the state of sowing.Field dust can make output voltage decline, and after sowing a period of time, dust concentration and the external world in discharging tube have reached mobile equilibrium, and the dust of photovalve surface deposition reaches maximum ga(u)ge, and output voltage can be again because dust reason decline.
As shown in Figure 8, the car-mounted terminal in the embodiment of the present invention arranges interface schematic diagram.
Particularly, car-mounted terminal 50 receives each row sowing state that monitoring device 10 reports, and shows in real time.Car-mounted terminal 50 display interface schematic diagram as shown in Figure 9, adopt graphic method to represent visually sowing state,
represent normal sowing state;
represent blocked state;
represent empty pipe condition;
represent that this row is closed, do not monitor this row sowing state.Numeral line number before state picture, when sowing state is while being abnormal, line number inverse shows.Car-mounted terminal 50 can also receive the land wheel speed that monitoring device 10 reports, as warning overhead control signal.Particularly, local wheel speed is not 0, while namely sowing, occurs abnormality, i.e. blank pipe or obstruction just can be sent warning.Otherwise, even if occur that abnormality also can not report to the police.Stop or stop sowing, automatic closing and alarm thereby can realize.Wherein, the mode of warning is but is not limited to report to the police by the mode of sound prompting or flash of light.
Further, on car-mounted terminal 50, can arrange flexibly seeder parameter, monitoring line number.Project is set as shown in Figure 8, comprises: land wheel speed; Times of collection; Speed interval; Occlusion threshold, monitoring line number; Blank pipe threshold value; Ground wheel diameter; Normal counting; Magnet number and blank pipe counting.Meanwhile as shown in figure 10, can also select to open or close any row, peasant household can select very neatly, is applicable to dissimilar seeder and different work condition.After the setting of part parameters completes, can send to monitoring device 10, then revise inner analog value.The proposition that interface and display interface are set of car-mounted terminal has realized friendly interface, has operated simple and easy object flexibly, has effectively promoted peasant household's Experience Degree simultaneously.
Although described by reference to the accompanying drawings embodiments of the present invention, but those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, such modification and modification all fall into by within claims limited range.
Claims (14)
1. the seeding detection method based on wheat seeder, is characterized in that, comprises concrete following steps:
S1: gather analog voltage signal and land wheel speed data, wherein, described analog voltage signal is exported by sowing sensor, and described land wheel speed data is obtained by ground-speed sensor;
S2: according to the characteristic information of described analog voltage signal, described analog voltage signal is analyzed, wherein, described characteristic information comprises magnitude of voltage, change in voltage and drilling continuity, the discontinuity state of described analog voltage signal;
S3: sow condition judgement according to the described characteristic information of the analog voltage signal after described analysis and described land wheel speed data.
2. the method for claim 1, is characterized in that, described step S3 specifically comprises:
S31: the described analog voltage signal of sowing sensor output described in multi collect;
S32: the described analog voltage signal collecting is carried out to low-pass filtering operation;
S33: the magnitude of voltage of the multiple described analog voltage signals that collect and occlusion threshold are compared;
S34: described in more than 50% image data of the magnitude of voltage of multiple described analog voltage signals of collecting be more than or equal to described occlusion threshold, carry out maximal value filtering algorithm;
S35: obtain the maximum difference of the magnitude of voltage of multiple described analog voltage signals by described maximal value filtering algorithm, be the maximum variable quantity of signal;
S36: if the maximum variable quantity of described signal is greater than blank pipe threshold value, recording status is larger for changing, if the maximum variable quantity of described signal is less than blank pipe threshold value, recording status is less for changing.
3. method as claimed in claim 2, is characterized in that, after described S33, also comprises step: if more than 50% image data of the magnitude of voltage of the multiple described analog voltage signals that collect is less than described occlusion threshold, judge that wheat cultivation state is as stopping up.
4. method as claimed in claim 2, it is characterized in that, described S36 further comprises: if described recording status is to change larger read-around ratio to drop in preset times threshold value, judge that sowing state is as normal, if described recording status is to change less read-around ratio to drop in described preset times threshold value, judge that sowing state is as blank pipe.
5. the seeding monitoring device based on wheat seeder, is characterized in that, comprising:
Acquisition module, for gathering analog voltage signal and land wheel speed data, wherein, described analog voltage signal is exported by sowing sensor, and described land wheel speed data is obtained by ground-speed sensor;
Analysis module, for described analog voltage signal being analyzed according to the characteristic information of described analog voltage signal, wherein, described characteristic information comprises magnitude of voltage, change in voltage and drilling continuity, the discontinuity state of described analog voltage signal;
Condition judgement module, for sowing condition judgement according to the described characteristic information of the analog voltage signal after described analysis and described land wheel speed data.
6. device as claimed in claim 5, is characterized in that, described condition judgement module also comprises:
Collecting unit, for sowing the described analog voltage signal of sensor output described in multi collect;
Low-pass filtering operation unit, for carrying out low-pass filtering operation to the described analog voltage signal collecting;
Comparing unit, for comparing the magnitude of voltage of the multiple described analog voltage signals that collect and occlusion threshold;
Maximal value filtering algorithm performance element, the image data for the magnitude of voltage of the described multiple described analog voltage signals that collect more than 50% is more than or equal to described occlusion threshold, carries out maximal value filtering algorithm;
Acquiring unit, for obtain the maximum difference of the magnitude of voltage of multiple described analog voltage signals by described maximal value filtering algorithm, is the maximum variable quantity of signal;
Condition judgement unit, if be greater than blank pipe threshold value for the maximum variable quantity of described signal, recording status is larger for changing, if the maximum variable quantity of described signal is less than blank pipe threshold value, recording status is less for changing.
7. device as claimed in claim 6, is characterized in that, if described condition judgement unit is also for the magnitude of voltage of multiple described analog voltage signals of collecting, more than 50% image data is less than described occlusion threshold, judges that wheat cultivation state is as stopping up.
8. device as claimed in claim 6, it is characterized in that, if described condition judgement unit is also to change larger read-around ratio to drop in preset times threshold value for described recording status, judge that sowing state is as normal, if described recording status is to change less read-around ratio to drop in described preset times threshold value, judge that sowing state is as blank pipe.
9. the seeding detection system based on wheat seeder, is characterized in that, comprising: this system comprises the device described in claim 5-8 any one item, described sowing sensor, described ground-speed sensor and car-mounted terminal.
10. system as claimed in claim 9, is characterized in that, between the device described in described claim 5-8 any one and described car-mounted terminal, adopts CAN bus distributed structure.
11. systems as claimed in claim 9, it is characterized in that, the device described in described car-mounted terminal and described claim 5-8 any one is by the join described land wheel speed data of the described analog voltage signal and the described ground-speed sensor that obtain described sowing sensor of CAN connecting line.
12. systems as claimed in claim 9, is characterized in that, described car-mounted terminal has parameter setting function.
13. systems as claimed in claim 9, is characterized in that, described sowing sensor adopts powerful infrarede emitting diode as luminotron, adopt powerful infrared electro triode as receiving tube.
14. systems as claimed in claim 9, is characterized in that, the described land wheel speed data of described ground-speed sensor collection realizes parking automatic closing and alarm as warning overhead control signal.
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| CN109275389A (en) * | 2017-07-19 | 2019-01-29 | 马特马克股份公司 | Material sowing apparatus for farm machinery |
| CN109673217A (en) * | 2019-01-25 | 2019-04-26 | 北京农业智能装备技术研究中心 | Vegetable drill operation fault diagnosis system and method |
| CN109831979A (en) * | 2017-11-24 | 2019-06-04 | 中国农业机械化科学研究院 | Air-flow conveying-type accurate fertilizing seeder and its broadcast leakage choke detecting method and device |
| CN110196087A (en) * | 2019-05-28 | 2019-09-03 | 中国农业机械化科学研究院 | A kind of Pneumatic conveying type wheat seeder flow detection warning device and method |
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