公开(公告)号：US20210354159A1

公开(公告)日：2021-11-18

申请号：US16475521

申请日：2018-07-13

Applicant: Jiangsu University

Inventor： Jinyang LI ,  Jing XU ,  Xinhua WEI ,  Hongwei SUN

IPC: B05B12/12 ,  G01S15/08 ,  G01S7/521 ,  A01M7/00

Abstract: A kind of real-time measurement system and method for height from spray boom to crop canopy was provided in present invention patent, which includes the following steps. Step 1: Calibration for ultrasonic ranging sensor; Step 2: Determination of included angle for two ultrasonic ranging sensors; Step 3: Collection of relative height between spray boom and crop canopy; Step 4: Anti-interference processing for height data; Step 5: Calculation of relative height from spray boom to crop canopy. Its characteristic lies in: two ultrasonic ranging sensors with a certain angle are installed at each end of the spray boom, the height of crop canopy was acquired under the control of control unit, and the relative height from spray boom to crop canopy was obtained by the anti-interference analysis and data conversion, the accurate monitoring for relative height from spray boom to crop canopy was realized while the spray boom is tilted. It breaks through the technical bottleneck that the relative height of the spray boom and the crop canopy cannot be accurately obtained when the spray boom tilts due to turbulence in the field operation of the spray boom sprayer, and lays a technical foundation for the dynamic adjustment of the balance and height of the spray boom.

公开(公告)号：US20240324494A1

公开(公告)日：2024-10-03

申请号：US18570637

申请日：2023-02-09

Applicant: JIANGSU UNIVERSITY

Inventor： Yuanyuan GAO ,  Peiying LI ,  Mengfan WANG ,  Xinhua WEI ,  Qingzhen ZHU ,  Dianzhe ZHAO ,  Aocheng QI ,  Yifei YANG

IPC: A01C7/20 ,  A01C5/06

CPC classification number: A01C7/205 ,  A01C5/062 ,  A01C7/203

Abstract: A device for measuring and calibrating the ground pressure of the seeding depth limiting wheels includes: a main body, connected to a pair of depth limiting wheels; a pressure adjusting member, arranged on the main body and configured to adjust a pressure of the depth limiting wheels to ground; a pressure sensor, arranged on the main body and configured to detect an actual pressure output by the pressure adjusting member; and a pressure acquisition calibrator, configured to detect a ground pressure applied by the depth limiting wheels on ground; and automatically fit a plurality of actual pressures and a plurality of ground pressures to establish a model for measuring ground pressure of a pair of depth limiting wheels. The device can automatically acquire a plurality of actual pressures and a plurality of ground pressures to establish a model for measuring ground pressure of a pair of depth limiting wheels.

公开(公告)号：US20220361406A1

公开(公告)日：2022-11-17

申请号：US17770052

申请日：2020-07-28

Applicant: Jiangsu University

Inventor： Xianping GUAN ,  Xiaokun WU ,  Jin ZHUANG ,  Xinhua WEI

IPC: A01D44/00 ,  B25J15/08 ,  B25J9/10 ,  B25J9/12 ,  B25J9/16 ,  B25J11/00

Abstract: The present invention provides a device and a method for picking and collecting Brasenia schreberi based on a machine vision. The device for picking and collecting Brasenia schreberi includes a supporting mechanical arm, a collection device, two working mechanical arms, a picking manipulator, a grasping manipulator, a control box, and a visual system. The supporting mechanical arm is fixed on a front end of a boat; the two working mechanical arms are fixed on a front end of the supporting mechanical arm; the picking manipulator and the grasping manipulator are mounted on tail ends of the two working mechanical arms, respectively; and the collection device is fixed on the boat; the visual system determines a location of the Brasenia schreberi and sends the location to the control box; the control box controls the two working mechanical arms, the grasping manipulator, and the picking manipulator to complete the grasping and picking of the Brasenia schreberi; and then the collection device collects the Brasenia schreberi.

公开(公告)号：US20230326203A1

公开(公告)日：2023-10-12

申请号：US18012230

申请日：2022-01-14

Applicant: Jiangsu University

Inventor： Aichen WANG ,  Huadong CAO ,  Binjie GAO ,  Lin LI ,  Xinhua WEI ,  Kun TAO

IPC: G06V20/10 ,  G01N21/84 ,  G06V10/774 ,  G06T7/00 ,  G06T5/00 ,  H04N23/54 ,  H04N23/51 ,  H04N23/56 ,  G06V10/46 ,  H01S5/024 ,  G03B17/02

CPC classification number: G06V20/188 ,  G01N21/84 ,  G06V10/774 ,  G06T7/0002 ,  G06T5/001 ,  H04N23/54 ,  H04N23/51 ,  H04N23/56 ,  G06V10/46 ,  H01S5/02415 ,  G03B17/02 ,  G01N2201/0633 ,  G01N2201/0636 ,  G01N2021/8466 ,  G01N2201/06113 ,  G06T2207/20081 ,  G06T2207/30188

Abstract: The present disclosure provides a portable apparatus for detecting early crop diseases based on spatial frequency domain imaging. The apparatus includes an end cover, a spatial frequency domain imaging apparatus, a dark box body, a telescopic section, and an opening-and-closing apparatus connected in sequence. The detection method includes: putting a crop sample to be detected into the dark box body from a bottom; projecting structured light of sine grey scale patterns with different spatial frequencies to the crop sample; after the sine gray scale pattern is switched each time, acquiring, by a camera, a diffuse reflection image of a surface of the crop sample once; after capturing all diffuse reflection images, performing uniformity correction on the images, demodulating the images, and extracting an alternating current component; and inputting an alternating current component image to a trained disease detection model, and determining whether the crop sample has a disease.