High-Speed Planter Seed Spraying With Predicted Drop Timing
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Solution Overview
Problem
Conventional spraying systems for seed-specific fluid application are not adapted for use with high-speed planters, as they fail to accurately determine the location or 'drop time' of seeds distributed by these planters, which affects the precise placement of agricultural fluids.
Innovation Solution
A planter system with a sensor that detects seeds passing a detection location, a control system that determines travel time based on baseline and operating speeds, and a valve controlled to spray fluid at the appropriate time and location relative to the seeds, ensuring accurate seed-specific fluid placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional spraying systems are used with high-speed planters, then the planter can operate at high speeds, but the fluid application precision deteriorates because the systems cannot accurately determine seed drop time and location
Solution Approach 1:
The system performs preliminary detection of the seed's position and calculates its trajectory before the seed reaches the spray zone. The controller uses the detected position, seed tube orientation, and conveyor speed to predict where the seed will land, then activates the spray nozzle in advance to ensure precise fluid application even at high planting speeds
Solution Approach 2:
The system introduces an intermediary calculation model that relates seed tube orientation angles, conveyor speeds, and seed drop trajectories. This mathematical model acts as a mediator between the sensor detection and the spray actuation, enabling the system to accurately determine fluid application timing and location without direct mechanical linkage
2Manufacturing precision
If seed-specific fluid placement is implemented, then fluid application precision improves, but the system complexity increases due to additional sensors and control mechanisms
Solution Approach 1:
The optical sensor serves multiple functions: it detects seed position, determines seed tube orientation, and triggers spray actuation. The same sensor system is used for both monitoring and control purposes, reducing the need for separate dedicated components and thereby limiting the increase in system complexity
Solution Approach 2:
The system replaces complex mechanical linkages and direct physical connections with an optical detection and electronic control system. The optical sensor and controller use light-based detection and electronic signal processing to achieve precise fluid placement without requiring complex mechanical timing mechanisms
3Manufacturing precision
If seed detection and trajectory calculation are performed, then fluid placement accuracy improves, but the processing time and computational requirements increase
Solution Approach 1:
The system performs preliminary detection of the seed's position and calculates its trajectory before the seed reaches the spray zone. The controller uses the detected position, seed tube orientation, and conveyor speed to predict where the seed will land, then activates the spray nozzle in advance to ensure precise fluid application even at high planting speeds
Solution Approach 2:
The system rapidly processes the essential parameters (seed position, orientation, conveyor speed) and quickly computes the trajectory prediction and spray timing. By focusing only on the critical data needed for accurate placement and executing the calculation efficiently, the system minimizes processing time while maintaining high fluid placement accuracy
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise application of agricultural fluids at the correct time and location relative to seeds, even at high speeds, improving germination and development by ensuring consistent seed-specific fluid placement.
Implementation Method 1
a sensor configured to transmit a detection signal upon detection of the seed passing a detection location
Implementation Method 2
a conveyor apparatus configured to propel or carry the seed through the seed tube
Implementation Method 3
a nozzle assembly configured to spray the fluid in response to receiving a control signal
Data Source
AI summary
A planter system for planting seeds and spraying fluid includes a seeder assembly including a seed tube and a conveyor apparatus configured to propel or carry the seed through the seed tube. The planter system also includes a sensor configured to transmit a detection signal upon detection of the seed passing a detection location. The planter system also includes a control system configured to determine a travel time of the seed from the detection location to a furrow based on a baseline drop time for the seed, a baseline travel speed of the seeder assembly, and an operating travel speed of the seeder assembly. The control system is configured to transmit a control signal to a valve coupled to a nozzle assembly based on the travel time and the detection signal to spray the fluid on or adjacent the seed.