Concrete Mixer Drum Speed Control for Property Consistency
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Solution Overview
Problem
Concrete mixer vehicles face challenges in maintaining desirable concrete properties during transportation due to passive drum rotation control, leading to undesirable concrete properties upon arrival at job sites.
Innovation Solution
A vehicle system with processing circuits and memory devices that actively control the drum drive system based on environmental data, GPS data, and sensor inputs to maintain target properties of the concrete, adjusting rotation speed and mixing drum operation in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If passive drum rotation control is used, then the device complexity is reduced, but the concrete property consistency deteriorates
Solution Approach 1:
The system continuously monitors concrete properties during transport and uses this feedback to dynamically adjust drum rotation speed, maintaining target properties despite changing conditions. Sensors detect concrete characteristics and the controller modifies drum speed in real-time to compensate for variations.
Solution Approach 2:
The drum rotation speed is changed from a fixed passive state to a dynamically adjustable state. The system adapts drum speed based on real-time concrete properties, transport time, temperature, and other variables to maintain optimal mixing conditions throughout the journey.
2Stability of the object's composition
If active drum rotation control is implemented, then the concrete property consistency is improved, but the device complexity increases
Solution Approach 1:
The system monitors its own operation and automatically adjusts drum speed without external intervention. The control system uses sensor data and embedded algorithms to self-regulate mixing parameters, reducing the need for manual operator input and complex external control mechanisms.
Solution Approach 2:
The system changes operational parameters (drum rotation speed, mixing intensity) based on detected concrete properties and environmental conditions. By dynamically adjusting these parameters, the system maintains optimal mixing conditions while using relatively simple control hardware.
3Duration of action of moving object
If drum rotation speed is increased to prevent setting, then the concrete remains workable longer, but the mixing quality deteriorates
Solution Approach 1:
The drum rotation employs periodic variation in speed rather than constant rotation. The system alternates between different rotation phases to maintain concrete workability over extended periods while periodically enhancing mixing action to preserve or improve mixing quality throughout transport.
Data Source
AI summary
A vehicle system includes a controller configured to acquire environment data, acquire GPS data including information regarding characteristics of a route between an initial location of a vehicle and a destination for the vehicle, receive an initial property of drum contents within a mixing drum of the vehicle, receive a target property for the drum contents, operate a drum drive system of the vehicle at a first drive speed determined based on the initial property, the target property, the environment data, and the GPS data, receive a signal from a mixture sensor indicative of a current property of the drum contents at a current location of the vehicle different than the initial location, and adjust the first drive speed of the drum drive system to a second drive speed where the second drive speed is determined based on the target property, the current property, updated environment data, and updated GPS data.