Gimbal Gradient Indicator for Excavator Operator Accuracy
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Solution Overview
Problem
Excavating equipment operators rely on unreliable 'operator feel' to determine slope angles, which is inconsistent and influenced by surroundings and equipment variables, leading to inaccurate grading.
Innovation Solution
A gradient-indicating apparatus with a gimbal assembly and concentric circles, where the inner orb is suspended in a semi-viscous fluid, providing accurate gradient information by remaining in a true vertical position, allowing operators to control the vehicle for precise grading without recalibration across different machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If operator feel is used to determine slope angles, then the operator can operate the equipment without additional devices, but the measurement accuracy and reliability deteriorate due to inconsistency and influence from surroundings and equipment variables
Solution Approach 1:
The patent replaces the mechanical sensing method (operator feel) with a gravimetric sensing system using a suspended inner orb that responds to gravitational forces. This substitution provides objective, consistent gradient measurements independent of operator variability while maintaining ease of operation through direct visual indication.
Solution Approach 2:
The patent introduces an intermediary sensing mechanism (the suspended inner orb with concentric circles) that mediates between the physical state of the vehicle and the operator's perception. This intermediary provides reliable gradient information that the operator can trust, eliminating the need to rely on inconsistent subjective feel while keeping the system simple to operate.
2Measurement precision
If electronic grade indicators are installed on the equipment, then measurement precision improves, but the device complexity increases and requires calibration for different machines
Solution Approach 1:
The patent employs a simple, robust mechanical gravimetric system rather than complex electronic sensors. The inner orb suspended in fluid is a durable, maintenance-free mechanism that provides reliable measurements without requiring calibration or sophisticated electronics, effectively replacing complex electronic grade indicators with a simpler analog system.
Solution Approach 2:
The suspended inner orb mechanism serves multiple functions: it indicates gradient angle, provides visual feedback, and works across different equipment types without recalibration. The concentric circles and pointer system provides universal gradient measurement applicable to various construction vehicles, eliminating the need for machine-specific calibration required by electronic systems.
3Reliability
If the gradient indicator uses a suspended inner orb in semi-viscous fluid, then reliability and durability improve, but the response time may be affected by fluid viscosity
Solution Approach 1:
The patent carefully selects the viscosity parameter of the fluid to achieve optimal balance. The semi-viscous fluid provides sufficient damping to eliminate oscillations and ensure stable, reliable readings, while maintaining low enough viscosity to allow reasonable response time to gradient changes. This parameter optimization resolves the contradiction between stability and responsiveness.
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 apparatus enables intuitive and accurate grading by providing immediate, durable, and robust gradient indications, reducing the need for extensive training or maintenance and allowing easy transfer between vehicles without recalibration.
Implementation Method 1
one of the concentric circles and the pointer moving with the vehicle as the vehicle tilts in a fore-aft direction and in a side-to-side direction, and the other of the concentric circles and the pointer remaining in a true vertical position
Data Source
AI summary
A gradient measuring apparatus includes a gimbal assembly operably supported in a construction vehicle for viewing by an operator to see gradient indications in fore-aft and sideways directions. The gimbal assembly includes an outer orb with pointer that moves with the vehicle, and an inner orb with concentric circles that stays in a true vertical by gravitational forces, the combination of which simultaneously accurately reflects a fore-aft and sideways grade at which a ground surface is being cut in an excavating process.