Compaction Vehicle Slip Detection via Dynamic Wheel Speed Ratio
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional compaction vehicle control apparatuses require manual input for each vehicle type, leading to specification differences and potential input errors, and are not adaptable to changes in tire air pressure or diameter, affecting slip determination accuracy.
Innovation Solution
A travelling control apparatus that automatically detects and calculates the rotational speed ratio of front and rear wheels, generates reference data based on actual ratios, and determines slips, allowing for a single specification to be applied across different vehicles, with adaptive control to maintain accurate slip determination and adjust motor speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual input is used for setting reference rotational speed ratio for each vehicle type, then the control apparatus can be customized for specific vehicles, but it requires additional management manpower and is prone to input errors
Solution Approach 1:
The control apparatus automatically acquires rotational speed data from sensors and computes the reference rotational speed ratio without requiring manual input. The system serves itself by using its own operational data to establish its control parameters, eliminating the need for external configuration and reducing human error.
Solution Approach 2:
The reference rotational speed ratio is dynamically determined based on actual operational parameters rather than being fixed manually. The system adjusts the reference value based on computed rotational speed ratios from sensor data, allowing adaptive parameter setting that improves both reliability and ease of operation.
2Adaptability or versatility
If fixed reference rotational speed ratio is preset for each vehicle type, then the control apparatus can be simplified in specification, but it cannot adapt to changes in tire air pressure or diameter affecting slip determination accuracy
Solution Approach 1:
The system continuously monitors the actual rotational speed ratio between front and rear wheels and compares it against the reference value. When deviations occur that indicate slip conditions, the system responds by adjusting motor speeds. This feedback mechanism enables adaptability to changing tire conditions without requiring complex pre-configured specifications for each scenario.
Solution Approach 2:
The control apparatus transitions from static fixed reference values to dynamic adaptive reference determination. The reference rotational speed ratio is computed based on actual vehicle operation data, allowing the system to adapt to changing conditions such as tire pressure variations and diameter changes while maintaining a relatively simple overall apparatus structure.
3Reliability
If different control apparatus specifications are prepared for every compaction vehicle type, then slip determination accuracy can be optimized for each vehicle, but it increases manufacturing complexity and inventory management burden
Solution Approach 1:
A single standardized control apparatus design is created that can be applied to multiple compaction vehicle types. The universal design achieves vehicle-specific optimization through automatic parameter computation based on each vehicle's operational characteristics, eliminating the need for multiple specialized apparatus specifications while maintaining high slip determination accuracy across different vehicle types.
Data Source
AI summary
A travelling control apparatus 1 includes: rotational speed ratio detection units 2 configured to output signals S1, S2 of respective rotational speeds of front and rear wheels; a rotational speed ratio calculation measure 3 for calculating data Da of a rotational speed ratio of the wheels from the signals S1, S2; a rotational speed ratio sort measure 4 for sorting the data Da into data D1 within a range of a set range T1 and data D2 out of the range; a reference data generation measure 5 for averaging the data D1 and generating an average value thereof as reference data Ds; and a slip determination measure 6 for comparing data Da1 of the rotational speed ratio of the wheels with the reference data Ds, and in a case of the data Da1 being out of a set range T2, for determining that one of the wheels is slipping.