Dynamic-Resolution Magnetic Sensor for Wheel Speed Encoding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing magnetic field sensors in automotive applications face challenges in dynamically adjusting resolution based on wheel speed to accurately measure and encode speed and position data for precise vehicle control systems.
Innovation Solution
A sensor system that includes magnetic field sensing elements and processing circuitry to detect signal frequency, identify and adjust resolution, and transmit data streams with encoded speed pulses and resolution indicators, allowing for dynamic resolution adjustment based on wheel speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor uses a fixed high resolution to accurately measure wheel speed and position, then measurement precision is improved, but device complexity and data transmission load increase
Solution Approach 1:
The sensor dynamically adjusts its resolution based on the detected wheel speed. At low speeds, the sensor operates at high resolution to accurately capture position and speed changes. At high speeds, the resolution is reduced to minimize data transmission load and processing complexity. This dynamic adaptation resolves the contradiction by making the measurement precision variable rather than fixed.
Solution Approach 2:
The sensor changes the resolution parameter according to the operating conditions (wheel speed). The processing circuitry detects the wheel speed and accordingly adjusts the resolution parameter of the magnetic field sensing elements, thereby optimizing the balance between measurement precision and system complexity for different operating regimes.
2Measurement precision
If the sensor transmits high-resolution data at all speeds, then measurement precision is maintained, but energy consumption and data transmission load increase
Solution Approach 1:
The sensor implements dynamic resolution adjustment where the data transmission resolution is adapted to the wheel speed. During low-speed operation, high-resolution data is transmitted to ensure accurate measurement of speed and position. During high-speed operation, the resolution is reduced, thereby decreasing the data transmission load and energy consumption while maintaining sufficient measurement precision for the current operating conditions.
Solution Approach 2:
The sensor modifies the data transmission parameter (resolution) based on the detected wheel speed. The processing circuitry determines the appropriate resolution level and configures the data transmission accordingly, changing the parameter to optimize the balance between measurement precision and energy consumption for different speed regimes.
3Adaptability or versatility
If the sensor uses dynamic resolution adjustment based on wheel speed, then adaptability is improved, but device complexity increases
Solution Approach 1:
The sensor employs dynamic resolution adjustment where the processing circuitry detects the wheel speed and automatically selects the appropriate resolution level. This dynamic behavior enables the sensor to adapt to varying operating conditions, improving versatility while keeping the complexity increase manageable through automated control rather than manual configuration.
Solution Approach 2:
The sensor system performs self-adjustment of its resolution parameter based on the detected wheel speed. The processing circuitry autonomously determines the appropriate resolution level and configures the sensing and transmission parameters without external intervention, thereby improving adaptability while minimizing the complexity burden on the external control system.
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
Enhances accuracy in measuring wheel speed and position, facilitating precise vehicle operations such as self-parking and other autonomous features by adapting resolution to varying wheel speeds.
Implementation Method 1
one or more first magnetic field sensing elements configured to generate, at least in part, a first signal in response to a magnetic field that is associated with a rotating target
Data Source
AI summary
According to aspects of the disclosure, a method is provided for use in a sensor, the method comprising: detecting that a frequency of a first signal is in a first range, the first signal being generated, at least in part, by one or more first magnetic field sensing elements, the first signal being generated in response to a magnetic field that is associated with a rotating target, the rotating target including a plurality of pole pairs; identifying a first resolution that corresponds to the first range and causing the first resolution to become a current resolution of the sensor; and transmitting a data stream in accordance with the current resolution of the sensor, wherein transmitting the data stream includes: (i) transmitting a plurality of speed pulses that encode a speed of the rotating target, and (ii) transmitting a plurality of data pulse sets.