Yaw Rate Sensor Interrupt Interface Power Saving
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Solution Overview
Problem
Existing yaw rate sensors consume power continuously, even when no yaw rate is being measured, due to the need for continuous excitation of oscillating masses, leading to inefficient power usage.
Innovation Solution
Incorporating an interrupt interface within the yaw rate sensor that reduces the frequency and/or amplitude of working oscillations upon detection of an interrupt signal, allowing the sensor to switch to a power-saving mode without external control units, thereby reducing power consumption. This interface can be easily integrated and is cost-effective, using minimal installation space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the yaw rate sensor continuously excites the oscillating masses to measure yaw rate, then the measurement function is maintained, but power consumption increases
Solution Approach 1:
The patent implements dynamic adjustment of the excitation state of the oscillating masses based on operational requirements. The sensor can switch between continuous excitation mode (for active yaw rate measurement) and reduced/excluded excitation mode (for power-saving when no measurement is needed), allowing the system to adapt its energy consumption to actual operational demands rather than maintaining constant high-power operation
Solution Approach 2:
The patent changes the excitation parameters (frequency and amplitude) of the oscillating masses based on operational state. When entering power-saving mode, the excitation frequency and amplitude are reduced or eliminated, directly lowering power consumption while maintaining the ability to quickly resume full measurement function when needed
2Adaptability or versatility
If an external control unit is used to manage power-saving mode, then control flexibility is improved, but device complexity and response time increase
Solution Approach 1:
The yaw rate sensor is designed with self-contained power-saving capability, where the sensor itself monitors its operational state and automatically adjusts its excitation without requiring external microcontrollers or processors. The sensor includes internal evaluation means that detect when yaw rate measurement is not needed and autonomously switch to power-saving mode, eliminating the need for complex external control units while maintaining responsive power management
Solution Approach 2:
The patent extracts the power-saving control function from external control units and integrates it directly into the yaw rate sensor itself. By removing the dependency on external microcontrollers for power management, the system reduces overall complexity while maintaining the ability to efficiently transition between operational and power-saving states
3Use of energy by moving object
If the oscillation frequency is reduced to save power, then power consumption decreases, but measurement responsiveness may be affected
Solution Approach 1:
The patent implements periodic evaluation of operational requirements rather than continuous high-power operation. The sensor maintains low-power state with minimal or no excitation and only activates full oscillation when measurement is actually needed, creating a periodic pattern of low-power intervals separated by brief high-responsiveness measurement windows, thus balancing energy savings with measurement capability
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 significantly reduces power consumption by enabling the yaw rate sensor to enter a power-saving mode quickly and efficiently, conserving energy both in the sensor and external control units, while ensuring that no measurable yaw rates are overlooked.
Implementation Method 1
a first Coriolis deflection of the first oscillating mass and a second Coriolis deflection of the second oscillating mass each being detected with the aid of evaluation means
Data Source
AI summary
A yaw rate sensor having a substrate and a seismic mass is described, in which the seismic mass is excitable to a working oscillation relative to the substrate via a drive unit, and a Coriolis deflection of the seismic mass is detectable relative to the substrate, in which the yaw rate sensor furthermore has an interrupt interface, the drive unit being configured to reduce a frequency and/or an amplitude of the working oscillation if an interrupt signal is present at the interrupt interface.