Inertial Force Sensor Autonomous Power Mode Control
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Solution Overview
Problem
Conventional inertial force sensors require a user or external circuit intervention to restore from a power saving mode to a normal power mode, which is inefficient and may lead to increased power consumption and malfunction due to noise or temperature changes.
Innovation Solution
An inertial force sensor configuration with first and second sensor elements, signal processors, and a power controller that autonomously transitions between power saving and normal modes based on detected inertial forces, using acceleration and angular velocity sensors to manage power supply, thereby eliminating the need for external intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the inertial force sensor operates in power saving mode, then power consumption is reduced, but the sensor cannot autonomously restore to normal mode and requires external intervention
Solution Approach 1:
The power controller autonomously monitors inertial force values from sensor elements and automatically controls power supply to signal processors, enabling the system to restore itself to normal mode without external intervention when motion is detected, while maintaining power saving mode during stationary states
Solution Approach 2:
The power controller continuously receives feedback on inertial force values from the sensor elements and adjusts power supply to signal processors accordingly, creating a closed-loop control system that automatically transitions between power saving and normal modes based on detected motion
2Loss of energy
If the sensor waits for external trigger to restore power mode, then power is saved during stationary state, but restoration time increases and may cause malfunction
Solution Approach 1:
The power controller preliminarily monitors inertial force values and proactively restores power to signal processors before external intervention is needed, detecting motion conditions that warrant mode restoration and acting in advance to prevent malfunction while maintaining power efficiency
3Measurement precision
If the sensor uses multiple sensor elements for comprehensive detection, then measurement precision improves, but power consumption increases
Solution Approach 1:
The system uses multiple sensor elements for comprehensive inertial force detection but applies partial processing by controlling power supply to signal processors based on actual motion conditions, enabling high measurement precision when needed while reducing power consumption during stationary states
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
This configuration reduces power consumption, shortens restoration time, and minimizes malfunctions by automatically adjusting power levels based on inertial force values, ensuring efficient operation without user or external circuit intervention.
Implementation Method 1
The first sensor element converts a first inertial force to an electric signal, and the second sensor element converts a second inertial force different from the first inertial force to an electric signal
Data Source
AI summary
An inertial force sensor has a first sensor element, a second sensor element, a first signal processor, a second signal processor, and a power controller. The first sensor element converts a first inertial force to an electric signal, and the second sensor element converts a second inertial force to an electric signal. The first signal processor is connected to the first sensor element, and outputs a first inertial force value. The second signal processor is connected to the second sensor element, and outputs a second inertial force value. The power controller is connected to the first signal processor and the second signal processor, and changes power supplied to the second signal processor based on the first inertial force value.