Crop stand analyzer using reflective laser proximity sensors

• US 9,804,097 B1
• Filed: 05/20/2015
• Issued: 10/31/2017
• Est. Priority Date: 06/02/2014
• Status: Active Grant

• Current Assignee: Iowa State University Research Foundation Incorporated (Iowa State University)
• Original Assignee: Iowa State University Research Foundation Incorporated (Iowa State University)
• Inventors: Tang, Lie, Li, Ji, Bao, Yin, Jin, Jian, Nakarmi, Akash Dev
• Primary Examiner(s): Peng, Charlie Y
• Application Number:
  US14/717,613
• Time in Patent Office: 895 Days
• CPC Class Codes: G01N 2021/8466 Investigation of vegetal material, e.g. leaves, plants, fruits
• CPC Class Codes: G01N 21/84 Systems specially adapted for particular applications
• CPC Class Codes: G01N 2201/021 Special mounting in general

Abstract

A crop stand analyzer includes a first plurality of reflective laser proximity sensors, the reflective laser proximity sensors arranged in a vertical row and perpendicularly to a ground surface to detect plant objects, a distance sensor, and a processor operatively connected to the first plurality of reflective laser proximity sensors and the distance sensor. The crop stand analyzer is configured to generate side-view profiles for the plant objects and then extract plant stand information via these profiles.

Claims

1. A crop stand analyzer comprising:

a first plurality of reflective laser proximity sensors, the reflective laser proximity sensors arranged in a vertical row and perpendicularly to a ground surface to detect plant objects;

a distance sensor;

a processor operatively connected to the first plurality of reflective laser proximity sensors and the distance sensor;

wherein the crop stand analyzer is configured to generate side-view profiles for the plant objects and then extract plant stand information via these profiles.

2. The crop stand analyzer of claim 1 wherein the distance sensor comprises a wheel shaft encoder.

3. The crop stand analyzer of claim 2 further comprising a mobile platform, the first plurality of reflective laser proximity sensors mounted to the mobile platform and a wheel associated with the wheel shaft encoder operatively connected to the mobile platform.

4. The crop stand analyzer of claim 3 wherein the mobile platform comprise a cart.

5. The crop stand analyzer of claim 1 wherein the plant stand information comprises population, interplant spacing and stem diameter.

6. The crop stand analyzer of claim 1 wherein the processor is configured to reference data from the reflective laser proximity sensors to data from the distance sensor.

7. The crop stand analyzer of claim 1 further comprising a global navigation satellite system receiver operatively connected to the processor.

8. The crop stand analyzer of claim 7 wherein the processor is configured to reference data from the distance sensor to position data from the global navigation satellite system receiver.

9. The crop stand analyzer of claim 1 further comprising a second plurality of reflective laser proximity sensors arranged in a vertical row and perpendicularly to a the ground surface to detect plant objects and wherein the first plurality of reflective laser proximity sensors detect plant objects in a first row and the second plurality of reflective laser proximity sensors detect plant objects in a second row.

10. An agricultural vehicle comprising the crop stand analyzer of claim 1.

11. An agricultural vehicle comprising a plurality of the crop stand analyzer of claim 1.

12. A method for analyzing crop stands, comprising steps of:

providing a system comprising (a) a first plurality of reflective laser proximity sensors, the reflective laser proximity sensors arranged in a vertical row and perpendicularly to a ground surface to detect plant objects, (b) a distance sensor, and (c) a processor operatively connected to the first plurality of reflective laser proximity sensors and the distance sensor;

acquiring laser data from the first plurality of reflective laser proximity sensors;

acquiring position data from the distance sensor;

registering the position data with the laser data using the processor;

computing plant data comprising at least one of plant population data, interplant spacing, and stem spacing from the position data and the laser data.

13. The method of claim 12 wherein the steps of acquiring the laser data, acquiring the position data, registering the position data with the laser data, and computing the plant data is performed as the system is moved through a field.

14. The method of claim 12 further comprising determining whether to advance a hybrid or variety in a plant breeding program using the plant data.

15. The method of claim 12 further comprising determining whether to commercialize a hybrid or variety using the plant data.

16. A crop stand analyzer comprising:

a plurality of row units wherein each of the row units comprises (a) a first plurality of reflective laser proximity sensors, the reflective laser proximity sensors arranged in a vertical row and perpendicularly to a ground surface to detect plant objects, (b) a distance sensor;

a processor operatively connected to each of the first plurality of reflective laser proximity sensors and each of the distance sensors;

wherein the processor is configured to generate side-view profiles for the plant objects and then extract plant stand information via these profiles.

17. The crop stand analyzer of claim 16 further comprising a mobile platform, each of the first plurality of reflective laser proximity sensors mounted to the mobile platform and at least one wheel operatively connected to the mobile platform.