CN114402758A - Seed sowing device with cavity light curtain scanning type miss-seeding detection function and miss-seeding detection method - Google Patents
Seed sowing device with cavity light curtain scanning type miss-seeding detection function and miss-seeding detection method Download PDFInfo
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- CN114402758A CN114402758A CN202210023968.0A CN202210023968A CN114402758A CN 114402758 A CN114402758 A CN 114402758A CN 202210023968 A CN202210023968 A CN 202210023968A CN 114402758 A CN114402758 A CN 114402758A
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/12—Detecting, e.g. by using light barriers using one transmitter and one receiver
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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Abstract
The invention relates to the technical field of agricultural machinery, and particularly discloses a seeding device with cavity light curtain scanning type miss-seeding detection and a miss-seeding detection method; the device comprises a seed metering device, a signal acquisition unit and a control system, wherein the seed metering device comprises a seed metering device shell, a seed metering disc, a seed inlet pipe, a driving device, a left glass cover plate and a right glass cover plate, a plurality of sector ring cavity channels and sector ring contrast counter bores corresponding to the sector ring cavity channels are arranged on the seed metering disc in an annular array manner, the signal acquisition unit comprises a light curtain sensor transmitting end, a light curtain sensor receiving end and a laser sensor, the light curtain sensor transmitting end and the light curtain sensor receiving end are respectively arranged on corresponding radial strip-shaped openings, and the laser sensor and the light curtain sensor receiving end are arranged on the seed metering device shell along the same radial line; the seed discharging device disclosed by the invention is not influenced by the change of the seeding speed and the posture of the seeds when the seed discharging missing-seeding detection is carried out, and simultaneously, the influence of field vibration and dust splashing on the missing-seeding detection accuracy is reduced.
Description
Technical Field
The invention relates to the technical field of agricultural machinery, and particularly discloses a seeding device with cavity light curtain scanning type miss-seeding detection and a miss-seeding detection method.
Background
The existing miss-seeding detection method of the seeding apparatus is mostly arranged at a seeding port or a seed guide pipe of the seeding apparatus, and a mode of setting time intervals is adopted to determine a time domain of each detection, namely a detection result in each time domain is a detection result of each seeding miss-seeding.
For example, the invention patent with the application number of CN2017111223543 discloses a miss-seeding detection seed sowing machine, which comprises a seed sowing machine shell, a seed sowing device, a miss-seeding detection device and a data acquisition device, wherein the seed sowing device is arranged in the seed sowing machine shell; the miss-seeding detection device comprises a seed guide groove, a capacitance polar plate, an optical signal device and a connecting frame, wherein the seed guide groove comprises a seed guide groove body and a seed sowing pipe connected to the lower end face of the seed guide groove body, and the capacitance polar plate is also connected to the seed guide groove body; the capacitor plates are respectively connected with connecting frames, the two connecting frames are symmetrically arranged on two sides of the seed leakage gap, the connecting frames are also connected with optical signal devices, and the optical signal devices are connected with the data acquisition device. Also, for example, the invention patent with the application number CN2011102513446 discloses a miss-seeding detection device of a small-grain-diameter seed precision seed-metering device, which comprises a sensor system, a single chip microcomputer control system, an external equipment group and a control box, and can realize the detection of the rotation speed and the seed-metering frequency of the seed-metering device, the single chip microcomputer processes, stores and calculates the rotation speed and the seed-metering frequency signals collected by the sensor to judge the miss-seeding degree, and sends the real-time data result to a display to display, and simultaneously sends out a control signal to alarm, so as to achieve the purpose of detecting the miss-seeding of the seed-metering device. Although the seed metering devices disclosed by the two patents can realize online leak detection in the seed metering process, the detection devices are arranged in the seed metering opening or the seed guide pipe, the arrangement mode and the leak detection method are limited to stable seed feeding intervals and tracks, and the seed feeding intervals and the tracks are easily influenced by the seeding speed of a machine, field vibration and seed feeding postures in the actual seeding process, so that miss-seeding misjudgment is easily caused, and the accuracy of a detection result is influenced; meanwhile, dust splashed in the field splashes into the area of the seed discharging opening or the seed guide pipe, and the detection result is also influenced. Therefore, aiming at the defects of the leakage detection of the existing seed sowing device, the application provides a seed sowing device with cavity light curtain scanning type leakage sowing detection and a leakage sowing detection method, which can effectively solve the technical problems.
Disclosure of Invention
The invention aims to design a seed sowing device with cavity light curtain scanning type miss-seeding detection and a miss-seeding detection method aiming at the defects that the detection process is influenced by the seeding speed, field vibration and seed throwing posture of seeds, miss-seeding misjudgment is easily caused and the accuracy of the detection result is influenced when the existing seed sowing device is mostly arranged in a seed sowing port or a seed guide pipe of the seed sowing device during miss-seeding detection.
The invention is realized by the following technical scheme:
a seed sowing device with cavity light curtain scanning type miss-seeding detection comprises a seed sowing device, a signal acquisition unit and a control system, wherein the seed sowing device comprises a seed sowing device shell, a seed sowing disc, a seed inlet pipe, a driving device, a left glass cover plate and a right glass cover plate, a plurality of fan-shaped cavity channels and fan-shaped ring contrast counter bores corresponding to the fan-shaped cavity channels are arranged on the seed sowing disc in an annular array manner, the fan-shaped ring contrast counter bores are superposed with central angles of the fan-shaped cavity channels, and the left glass cover plate and the right glass cover plate are arranged on two end faces of the seed sowing disc;
the signal acquisition unit includes light curtain sensor transmitting terminal, light curtain sensor receiving terminal and laser sensor, the radial bar mouth of alignment is all seted up to first one of the both ends face of seed metering ware casing, light curtain sensor transmitting terminal, light curtain sensor receiving terminal are installed respectively on the radial bar mouth that corresponds and all are said with the fan ring and are aimed at, laser sensor and light curtain sensor receiving terminal are installed on the seed metering ware casing along same radial line and are aimed at with the fan ring contrast counter bore, light curtain sensor receiving terminal and laser sensor all with control system electric connection.
The invention sets the miss-seeding detection position in the seed carrying process of the seed sowing device, sets the miss-seeding detection position in the upper half part of the inner cavity of the seed sowing device but not in the position of the seed sowing opening or in the seed guiding pipe, then adopts the light curtain sensor to scan the annular cavity channel of the seed sowing disc, and completes the miss-seeding detection function by matching with the mode that the laser sensor scans the corresponding annular counter bore below the annular cavity channel of the seed sowing disc, namely, the spatial range of the corresponding annular cavity channel is determined by scanning the annular counter bore of the fan by the laser, and the light curtain sensor is adopted to scan and detect whether seeds exist in the annular cavity channel of the fan, thereby determining the miss-seeding situation. The method can effectively avoid the influence of the change of the seeding speed of the machine and the posture of the seeds on the detection precision of the missed seeding, and can effectively improve the influence of the field vibration of the machine on the detection precision of the missed seeding because the detection position of the missed seeding is positioned at the upper half part of the seeding apparatus and the detection space is limited in the cavity channel of the fan ring.
As a further arrangement of the above scheme, the system further comprises an external equipment set, wherein the external equipment set comprises a display screen and an alarm which are electrically connected with the control system. Above-mentioned display screen through peripheral hardware is through control system contrast analysis to light curtain sensor and laser sensor's detected signal when using, obtains the miss-seeding testing result, reports to the police and will miss-seeding number of times and show on the display when the miss-seeding takes place, makes things convenient for personnel to read in real time, can also take place the alarm in time through control system control siren simultaneously and remind personnel.
As a specific arrangement of the above scheme, the control system includes a microcontroller, a power converter and a voltage reduction module, and both the power converter and the voltage reduction module are electrically connected to the microcontroller; the microcontroller STM32F103ZET6, the power supply AC-DC converter and the voltage reduction module are sequentially connected with the microcontroller STM32F103ZET6 when being specifically set.
As a specific arrangement of the scheme, 10-30 fan ring cavity channels and fan ring contrast counter bores are arranged on the seed metering disc; the number of the fan ring cavity channels and the fan ring contrast counter bores is selected according to the size of the seed sowing plate and the sowing object, and is generally set to 20 preferentially.
As a specific arrangement of the above scheme, the signal acquisition unit further comprises a light curtain sensor slit cover plate and an installation connecting frame, the light curtain sensor slit cover plate is installed at the radial strip-shaped opening, a radial slit corresponding to the radial strip-shaped opening is formed in the light curtain sensor slit cover plate, the installation connecting frame is arranged on the light curtain sensor slit cover plate, the light curtain sensor receiving end and the laser sensor are installed on the installation connecting frame at one side, and the light curtain sensor transmitting end is installed on the installation connecting frame at the other side; the light curtain sensor slit cover plate and the mounting and connecting frame can be conveniently and stably mounted on the light curtain sensor receiving end and the laser sensor, and the light curtain sensor receiving end slit cover plate can be used for reducing the width of a light curtain received by the light curtain sensor receiving end, so that the front boundary and the rear boundary of the fan ring cavity channel can be accurately sensed.
According to the specific arrangement of the scheme, the width of the radial slit is 0.3-0.8 mm, and the length of the radial slit is equal to the radial size of the fan ring cavity; specifically, the length and width of the radial slit are determined according to the size condition of the seeding unit.
A miss-seeding detection method of a seed metering device using the miss-seeding detection comprises the following steps:
1) assembling the seed metering device, so that fan ring cavity channels and fan ring contrast counter bores on the seed metering disc are uniformly distributed on the circumference of the seed metering disc, the number of the fan ring cavity channels and the number of the contrast counter bores are equal, the fan ring cavity channels and the contrast counter bores are in one-to-one correspondence, the front boundaries and the rear boundaries are overlapped, a light curtain sensor receiving end and a light curtain sensor transmitting end are matched during seeding, the fan ring cavity channels are scanned one by one, stable periodic detection time domain signals are continuously generated, meanwhile, a laser sensor is scanned one by one with the fan ring contrast counter bores, stable periodic reference time domain signals are continuously generated, and the periodic detection time domain signals and the periodic reference time domain signals are synchronous;
2) when the fan-shaped annular cavity channel is filled with seeds normally, the receiving end of the light curtain sensor is shielded by the seeds and generates discontinuous level change in the corresponding detection time domain, so that the fan-shaped annular cavity channel is judged to be filled with seeds normally without seeding missing; when the seeds are leaked in the fan-shaped annular cavity channel and the seeding is leaked, the receiving end of the light curtain sensor is not shielded by the seeds, and the level in the corresponding detection time domain is not changed, so that the condition that the seeding is leaked in the fan-shaped annular cavity channel is judged.
Compared with the disclosed technology, the advantages of the invention include:
1) the precision of the seed discharging device disclosed by the invention in judging the detection time domain of each hole can not be influenced by the seeding speed of the machine and the change of the seed posture, so that the miss-seeding detection result can not be influenced by the seeding speed of the machine and the seed posture.
2) The seed metering device disclosed by the invention can reduce the influence of field vibration and dust splashing of machines on the miss-seeding detection accuracy.
3) Compared with the missed seeding detection at the commonly used seeding opening, the missed seeding detection method in the cavity channel in the seed carrying process is adopted, the missed seeding condition of the seeding device can be found earlier, and the method is convenient for taking corresponding measures in time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a perspective exploded view of a seed metering device body and a signal acquisition unit according to the present invention;
FIG. 2 is a perspective assembly view of the seed metering device body and the signal acquisition unit of the present invention
FIG. 3 is a schematic perspective view of the assembled seeding plate and left and right glass cover plates of the present invention;
FIG. 4 is a left side plan view schematically showing the structure of the seed discharging plate of the present invention;
FIG. 5 is a schematic diagram of a right-side plan view of a seed-metering disk of the present invention:
FIG. 6 is an assembled side view of a signal acquisition unit of the present invention;
FIG. 7 is an assembled front view of the signal acquisition unit of the present invention;
FIG. 8 is a schematic perspective view of a slit cover plate of a light curtain sensor according to the present invention;
fig. 9 is a general block diagram of the structure and the electric control in the present invention.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", and,
The terms "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like, refer to an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to the accompanying drawings 1 to 9, in conjunction with the embodiments.
Example 1
Referring to fig. 1 and 2, the seed sowing device body 300 comprises a seed sowing device left shell 6, a seed sowing device right shell 11, a seed sowing plate base 7, a seed sowing plate 9, a left organic glass cover plate 8, a right organic glass cover plate 10, a seed inlet pipe 13 and a motor 14. The seeding unit left shell 6 and the seeding unit right shell 11 are connected to form the whole seeding unit outer shell, the seed inlet pipe 13 is connected with the seed inlet port formed on the seeding unit right shell 11, and the lower end of the seeding unit left shell 6 is provided with a corresponding seeding port.
The seed metering disc seat platform 7, the seed metering disc 9, the left organic glass cover plate 8 and the right organic glass cover plate 10 are arranged in the seed metering device shell, and the left organic glass cover plate 8 and the right organic glass cover plate 10 are arranged on two sides of the seed metering disc 9 to form a complete detection disc. The left shell 6 of the seed sowing device is connected with a bearing 5, and is connected with a seed sowing disc seat 7, a left organic glass cover plate 8, a seed sowing disc 9, a right organic glass cover plate 10 and a right shell 11 of the seed sowing device in turn rightwards, then a motor 14 is arranged on the right shell 11 of the seed sowing device, the motor 14 is used as a driving power source and preferably selects a stepping motor, and an output shaft of the stepping motor is connected with the seed sowing disc seat 7, so that the stepping motor is used for driving the seed sowing device to work.
Meanwhile, the structural design of the whole seed discharging disc 9 is correspondingly improved, referring to fig. 3, fig. 4 and fig. 5, 10-30 sector annular cavities 9a are uniformly distributed on the circumference of the seed discharging disc 9, the number of the sector annular cavities 9a is determined according to the actual situation, and the number of the sector annular cavities 9a is preferably 20 in the embodiment. A fan ring-shaped contrast counter bore 9b is respectively arranged below each fan ring cavity channel 9a, the front and back boundaries of the fan ring cavity channel 9a and the fan ring-shaped contrast counter bore 9b point to the center of the seed sowing disk, namely, the central angles of the fan ring cavity channel 9a and the fan ring-shaped contrast counter bore 9b are the same, so that the miss-seeding detection time domain corresponding to the fan ring cavity channel 9a can be accurately obtained by scanning each contrast counter bore 9b through the laser sensor 3, and whether miss-seeding is accurately judged by scanning the fan ring cavity channel 9a through the light curtain sensor 1.
Referring to fig. 6, 7 and 8, the signal acquisition unit 200 includes a light curtain sensor receiving end 1, a light curtain sensor emitting end 12, a light curtain sensor slit cover plate 2, a laser sensor 3 and a sensor mounting link 4. The upper half parts of the left shell 6 and the right shell 11 of the seed sowing device are respectively provided with a strip-shaped opening 15 which are aligned with each other, and a mounting hole 16 is arranged below the strip-shaped opening 15. The light curtain sensor slit cover plate 2 is arranged on the seeding unit left shell 6 and the seeding unit right shell 11 at the strip-shaped opening 15, a radial slit 2a is arranged on the light curtain sensor slit cover plate 2, and the radial slit 2a is aligned with the strip-shaped opening 15 when the light curtain sensor slit cover plate is arranged. And then, a sensor mounting connecting frame 4 is fixedly arranged on the slit cover plate 2 of the light curtain sensor, then, a light curtain sensor receiving end 1 and a laser sensor 3 are mounted on the sensor connecting frame 4 along the radial direction of the seed metering disc in a collinear manner, the light curtain sensor receiving end 1 and a light curtain sensor transmitting end 12 are both communicated with a fan-shaped annular cavity channel in the seed metering device through a strip-shaped opening 15 and a radial slit 2a, and the laser sensor 3 is communicated with a fan-shaped annular contrasting counter bore in the seed metering device through a mounting hole 16. Meanwhile, the left side part of the detection module provided with the light curtain sensor receiving end 1 and the right side part of the detection module provided with the light curtain sensor transmitting end 12 are aligned and arranged on the outer sides of the left shell 6 and the right shell 11 of the seed sowing device.
When specifically setting up, this light curtain sensor slit apron 2's thickness can set up about 1 mm, and the width of radial slit 2a can set up in 0.3~0.8 mm within range, and this embodiment is preferred to be set up to 0.5 mm to the length of slit 2a is equal with the radial size of fan ring chamber way, controls the photic scope of light curtain sensor acceptance end through light curtain sensor slit apron 2, improves and detects the accuracy.
The micro-control system 100 in this embodiment includes a microcontroller STM32F103ZET 6103, a power supply AC-DC converter 101, and a voltage reduction module 102, wherein the power supply AC-DC converter 101 and the voltage reduction module 102 are connected in series with the microcontroller STM32F103ZET 6.
In addition, the seed metering device of the embodiment further includes an external equipment set 400, and when the external equipment set 400 is specifically set, the external equipment set includes a display 401 and an alarm 402. The display 401 and the alarm 402 are respectively connected to the microcontroller, and the microcontroller performs comparison analysis on detection signals of the light curtain sensor and the laser sensor to obtain a miss-seeding detection result, and alarms when miss-seeding occurs and displays miss-seeding times on the display. Specifically, the connection schematic diagram of the micro control system 100, the peripheral device group 400, the signal acquisition unit 200, and the like in this embodiment can refer to fig. 9.
In addition, the invention also discloses a miss-seeding detection method (namely the working principle and the using method of the seed metering device) by using the seed metering device in the embodiment 1, which comprises the following steps:
the method comprises the following steps: the fan ring cavity channels 9a and the fan ring-shaped counter bores 9b on the seed metering disc 9 are uniformly distributed on the circumference of the seed metering disc 9, the number of the fan ring cavity channels 9a is equal to that of the fan ring-shaped counter bores 9b, the fan ring cavity channels and the fan ring-shaped counter bores are in one-to-one correspondence, and the front and rear boundaries are superposed. When the seeding apparatus works, the receiving end 1 of the light curtain sensor is matched with the transmitting end 12 of the light curtain sensor to scan the fan-shaped annular cavity channels 9a one by one and continuously generate stable periodic detection time domain signals; meanwhile, the laser sensor 3 scans the comparison counter bores 9b one by one to continuously generate stable periodic reference time domain signals. The periodic detection time domain signals of the light curtain sensor receiving end 1 and the light curtain sensor transmitting end 12 are synchronous with the periodic reference time domain signal of the laser sensor 3.
Step two: when the fan-shaped annular cavity 9a is filled with seeds normally, the light curtain sensor 1 is shielded by the seeds, and discontinuous level change occurs in a corresponding detection time domain, so that the normal filling of the fan-shaped annular cavity 9a is judged, and no seeding leakage exists; when the seeds are leaked and sowed in the fan-shaped annular cavity 9a, the receiving end 1 of the light curtain sensor is not shielded by the seeds, and the level in the corresponding detection time domain is not changed, so that the condition that the seeds are leaked and sowed in the fan-shaped annular cavity is judged.
In a word, the seed metering device and the miss-seeding detection method disclosed by the invention adopt the light curtain sensor to scan the fan ring cavity channel in the special structural design seed metering disc, and complete the miss-seeding detection function in a way of matching with the laser sensor to scan the corresponding fan ring contrast counter bore below the fan ring cavity channel, namely, the space range of the corresponding fan ring cavity channel is accurately determined by scanning the fan ring contrast counter bore through the laser, and meanwhile, the light curtain sensor is adopted to scan and detect whether seeds exist in the fan ring cavity channel so as to determine the miss-seeding condition.
The invention can effectively avoid the influence of the change of the seeding speed of the machine and the posture of the seeds on the miss-seeding detection precision, and can carry out scanning miss-seeding detection in the cavity channel at the upper half part of the seed metering disc, thereby reducing the influence of the field vibration of the machine on the miss-seeding detection result, and avoiding the influence of the field splash dust on the miss-seeding detection result due to the scanning miss-seeding detection in the sealed cavity channel far away from the seed feeding mouth of the seed metering device.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A seed sowing device with cavity channel light curtain scanning type miss-seeding detection comprises a seed sowing device, a signal acquisition unit and a control system, and is characterized in that the seed sowing device comprises a seed sowing device shell, a seed sowing disc, a seed inlet pipe, a driving device, a left glass cover plate and a right glass cover plate, a plurality of sector ring cavity channels and sector ring contrast counter bores corresponding to the sector ring cavity channels are arranged on the seed sowing disc in an annular array manner, the sector ring contrast counter bores are coincided with central angles of the sector ring cavity channels, and the left glass cover plate and the right glass cover plate are arranged on two end faces of the seed sowing disc;
the signal acquisition unit includes light curtain sensor transmitting terminal, light curtain sensor receiving terminal and laser sensor, the radial bar mouth of alignment is all seted up to the first half of both ends face of seed metering ware casing, light curtain sensor transmitting terminal, light curtain sensor receiving terminal are installed respectively on the radial bar mouth that corresponds and all are said with the fan ring and are aimed at, laser sensor and light curtain sensor receiving terminal are installed on the seed metering ware casing along same radial line, just laser sensor aligns with the fan ring contrast counter bore, light curtain sensor receiving terminal and laser sensor all with control system electric connection.
2. A seed metering device with cavity light curtain scanning miss-seeding detection as claimed in claim 1 further comprising an external equipment set, wherein the external equipment set comprises a display screen and an alarm which are electrically connected with the control system.
3. A seed metering device with cavity light curtain scanning miss-seeding detection according to claim 1 or 2, wherein the control system comprises a microcontroller, a power converter and a voltage reduction module.
4. The seed metering device with cavity light curtain scanning type miss-seeding detection according to claim 1, wherein 10-30 fan ring cavity channels and fan ring contrast counter bores are arranged on the seed metering disc.
5. The seed metering device with cavity light curtain scanning type miss-seeding detection according to claim 1, wherein the signal acquisition unit further comprises a light curtain sensor slit cover plate and a mounting link, the light curtain sensor slit cover plate is mounted at the radial strip-shaped opening, a radial slit corresponding to the radial strip-shaped opening is formed in the light curtain sensor slit cover plate, the mounting link is arranged on the light curtain sensor slit cover plate, the light curtain sensor receiving end and the laser sensor are mounted on the mounting link at one side, and the light curtain sensor transmitting end is mounted on the mounting link at the other side.
6. The seed metering device with cavity light curtain scanning type miss-seeding detection according to claim 1, wherein the width of the radial slit is 0.3-0.8 mm, and the length of the radial slit is equal to the radial dimension of the fan ring cavity.
7. A miss-seeding detection method using the seed metering device of any one of claims 1 to 6, characterized by comprising the steps of:
1) matching a light curtain sensor receiving end with a light curtain sensor transmitting end, scanning fan ring cavity channels one by one, continuously generating stable periodic detection time domain signals, scanning the fan rings one by a laser sensor to contrast counter bores, continuously generating stable periodic reference time domain signals, enabling the periodic detection time domain signals to be synchronous with the periodic reference time domain signals, determining the space range of the corresponding fan ring cavity channels by scanning the fan rings by the laser sensor to contrast the counter bores, and adopting the light curtain sensor to scan and detect whether seeds exist in the corresponding fan ring cavity channels to judge the miss-seeding condition;
2) when the fan-shaped annular cavity channel is filled with seeds normally, the receiving end of the light curtain sensor is shielded by the seeds and generates discontinuous level change in the corresponding detection time domain, so that the fan-shaped annular cavity channel is judged to be filled with seeds normally without seeding missing; when the seeds are leaked in the fan-shaped annular cavity channel and the seeding is leaked, the receiving end of the light curtain sensor is not shielded by the seeds, and the level in the corresponding detection time domain is not changed, so that the condition that the seeding is leaked in the fan-shaped annular cavity channel is judged.
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| CN202210023968.0A CN114402758B (en) | 2022-01-10 | 2022-01-10 | Seed sowing device with cavity light curtain scanning type miss-seeding detection function and miss-seeding detection method |
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| CN202210023968.0A CN114402758B (en) | 2022-01-10 | 2022-01-10 | Seed sowing device with cavity light curtain scanning type miss-seeding detection function and miss-seeding detection method |
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| CN108195294A (en) * | 2018-01-19 | 2018-06-22 | 北京敏视达雷达有限公司 | The diameter measuring method and laser raindrop spectrograph of a kind of falling particles |
| US20190281759A1 (en) * | 2018-03-16 | 2019-09-19 | Cnh Industrial America Llc | Systems and methods for monitoring the operation of a seed meter |
| CN210808216U (en) * | 2019-09-04 | 2020-06-23 | 西北农林科技大学 | Double-row bucket wheel type seed sowing device with reseeding device |
| CN111788909A (en) * | 2020-04-24 | 2020-10-20 | 安徽农业大学 | Corn miss-seeding reseeding device and control system |
| CN111788908A (en) * | 2020-04-24 | 2020-10-20 | 安徽农业大学 | Corn miss-seeding reseeding device and control system |
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