Tractor-Implement Bus Communication for Selective Parameter Requests
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Solution Overview
Problem
The increasing amount of data from agricultural machine implements burdens the data transmission capacity of the data bus connecting the tractor and the implement, leading to inefficient data communication.
Innovation Solution
Optimizing data communication by having the control device on the tractor request only the present parameter values supported by the control unit on the implement, preventing requests for unsupported parameters and allowing subsets of parameters to change based on operation modes, thereby reducing data traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the control device requests data for all implement operation parameters, then complete data collection is achieved, but data traffic on the data bus increases
Solution Approach 1:
The control unit extracts and transmits only the subset of implement operation parameters for which it is configured to provide present parameter values, rather than all requested parameters. This selective extraction reduces data traffic while maintaining collection of all available data.
Solution Approach 2:
The control device requests data for all parameters (excessive action), but the control unit responds with only the subset it supports (partial action). This approach ensures no data is missed while avoiding unnecessary data transmission for unsupported parameters.
2Ease of operation
If the control unit provides data for all requested parameters, then data communication is simplified, but unsupported parameter requests waste data bus capacity
Solution Approach 1:
The control unit provides feedback in the response data message indicating which parameters it supports (P1 to Pm). This feedback mechanism allows the control device to adapt future requests, avoiding wasted data bus capacity on unsupported parameters while maintaining simple communication protocols.
3Measurement precision
If the control device requests present parameter values for all implement operation parameters, then comprehensive monitoring is achieved, but data traffic burden increases
Solution Approach 1:
The implement operation parameters are segmented into two groups: those supported by the control unit (P1 to Pm) and those not supported (Pm+1 to Pn). The control unit handles the first segment, while the second segment is excluded from future requests, reducing data traffic while maintaining monitoring of all available parameters.
Data Source
AI summary
An agricultural machine having a tractor and an implement hitched thereto and a method for operating same. The method comprising connecting a control device on the tractor and a control unit on the implement to a data bus. The control device processes a plurality of implement operation parameters and the control unit is assigned to a functional element of the implement. Furthermore, establishing data communication between the control device and the control unit through the bus, comprising, transmitting a response data message from the control unit to the control device indicating the control unit being configured to provide present parameter values for only a subset of implement operation parameters, but not a subset of remaining implement operation parameters. Further, future data collecting messages transmitted from the control device to the control unit are limited to requesting present parameter values for the subset of implement operation parameters.