Soil Compaction Machine Inclination Control for Downhill Speed Safety
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Solution Overview
Problem
Existing soil compaction machines face challenges in energy efficiency and operational reliability, particularly during downhill travel, where excessive speeds can compromise safety and increase power consumption.
Innovation Solution
A hand-held soil compaction machine equipped with an electric drive motor, a rechargeable battery, and a control device that adjusts the speed of the drive motor based on the inclination angle to maintain a constant speed during downhill travel, using sensors to determine the machine's direction and inclination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the drive motor operates at high speed during downhill travel, then the compaction function is maintained, but energy consumption increases and operational safety decreases due to excessive speeds
Solution Approach 1:
The control device continuously monitors the inclination angle via the inclination sensor and adjusts the drive motor speed accordingly. This closed-loop feedback system ensures that during downhill travel, the motor speed is automatically reduced when a negative inclination is detected, preventing excessive machine speed while maintaining compaction effectiveness through appropriate vibration frequency adjustment.
Solution Approach 2:
The system dynamically adjusts the drive motor operating parameters based on real-time terrain conditions. By continuously monitoring inclination angle and automatically modifying motor speed and vibration characteristics, the system adapts to changing operational conditions, optimizing both energy efficiency and safety without manual intervention.
2Use of energy by moving object
If the drive motor speed is reduced during downhill travel, then energy efficiency improves, but the compaction function may be adversely affected
Solution Approach 1:
The system applies different operational characteristics to different functions independently. While the drive motor speed is reduced for energy efficiency during downhill travel, the vibration excitation parameters are adjusted separately to maintain effective soil compaction. This localized optimization allows each function to operate at its optimal parameters independently.
Solution Approach 2:
The control device modifies multiple operational parameters simultaneously - reducing drive motor speed while adjusting vibration frequency and amplitude compensation. These coordinated parameter changes ensure that energy consumption is reduced without compromising the compaction effectiveness, as the vibration parameters are optimized to maintain soil densification despite lower drive speed.
3Reliability
If no speed control is implemented during downhill travel, then the machine structure remains simple, but excessive speed increases and operational safety decreases
Solution Approach 1:
The patent replaces complex mechanical speed control mechanisms with an electronic control system based on inclination sensing and motor control. Instead of using mechanical brakes or physical speed governors, the system uses electronic sensors and motor control to regulate speed, achieving safer operation with lighter, more compact components.
Solution Approach 2:
The control system automatically monitors inclination and adjusts motor speed without operator intervention. The inclination sensor continuously provides feedback to the control device, which self-regulates the drive motor to maintain safe speeds during downhill travel, eliminating the need for manual control or complex mechanical safety devices.
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
The solution enhances energy efficiency by reducing power consumption and ensures operational safety by maintaining a consistent speed and preventing excessive accelerations during downhill travel without affecting the compaction function.
Implementation Method 1
The driving parameter determination device is configured to determine an inclination angle α of the base plate (4) in the direction of travel with respect to a horizontal or a reference plane fixed to the horizontal
Implementation Method 2
They typically have a drive motor, for example an internal combustion engine that runs on petrol, diesel or natural gas. Single-cylinder engines are common, for example. Alternatively, electric motors can also be used. The drive motor is used, for example, to drive a so-called excitation unit. This typically comprises at least one unbalanced mass that is set in rotation by the drive motor
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a soil compaction machine (1), in particular a hand-guided soil compaction machine. The soil compaction machine (1) comprises a drive motor (6) and an excitation unit (7) driven by the drive motor (6), by means of which a base plate (4) can be set into vibration. The excitation unit (7) is designed to generate a vibration with a resulting direction of force action in order to move the soil compaction machine forward. The soil compaction machine further comprises a travel parameter determination device (9) for determining a direction of travel and an angle of inclination α of the base plate in the direction of travel with respect to a horizontal. Furthermore, a control device (10) is provided for reducing a speed of the drive motor as a function of the determined angle of inclination α during a downhill movement of the soil compaction machine.Furthermore, the invention relates to a method for operating a soil compaction machine.