Magnetoresistive Position Sensor Wake-Up Function
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Solution Overview
Problem
Conventional position sensing systems in battery-powered devices require multiple sensors and additional electronic components, leading to increased power consumption, space requirements, and manufacturing costs, as well as complex calibration needs.
Innovation Solution
A position sensing system utilizing a single magnetoresistive sensor that operates in both low-power and high-power modes, monitoring magnetic field changes to detect angular displacement and adjust power output to an electric component, such as an electric motor, using anisotropic magnetoresistive (AMR), tunnel-magnetoresistive (TMR), or giant-magnetoresistive (GMR) sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple discrete sensors are used for wake-up and position sensing functions, then the device can perform both functions, but power consumption increases and device volume increases
Solution Approach 1:
The patent combines wake-up detection and position sensing functions into a single magnetoresistive sensor that can operate in multiple modes. The sensor integrates both the activation detection capability (wake-up function) and the precise position sensing capability, eliminating the need for separate sensors and reducing overall power consumption while maintaining full functional capability.
Solution Approach 2:
The magnetoresistive sensor is designed to perform multiple functions: it can detect activation events (wake-up function) and simultaneously provide precise position sensing. This multi-functional sensor replaces multiple discrete sensors, reducing device complexity and power consumption while maintaining adaptability for different operational modes.
2Adaptability or versatility
If multiple discrete sensors are used for wake-up and position sensing functions, then the device can perform both functions, but device volume increases
Solution Approach 1:
The patent merges wake-up detection and position sensing into a single integrated magnetoresistive sensor, eliminating the need for multiple discrete sensors and their associated electronic components. This consolidation significantly reduces the space required in the device while maintaining both functional capabilities.
3Adaptability or versatility
If multiple discrete sensors are used for wake-up and position sensing functions, then the device can perform both functions, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple sensor functions into a single magnetoresistive sensor, reducing the total number of components that need to be manufactured, assembled, and calibrated. This integration simplifies the manufacturing process and reduces costs associated with handling multiple discrete sensors and their supporting electronic components.
Solution Approach 2:
The multi-functional magnetoresistive sensor performs both wake-up detection and position sensing, eliminating the need for multiple specialized sensors. This universality reduces component inventory requirements, simplifies assembly procedures, and reduces calibration complexity, all of which contribute to lower manufacturing costs.
4Adaptability or versatility
If multiple discrete sensors are used for wake-up and position sensing functions, then the device can perform both functions, but device complexity increases
Solution Approach 1:
The patent integrates wake-up detection and position sensing functions into a single magnetoresistive sensor, eliminating the need for multiple discrete sensors and their associated electronic components such as diodes, resistors, and capacitors. This consolidation significantly reduces device complexity while maintaining full functional 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
This solution reduces power consumption and manufacturing costs by enabling a single sensor to handle both wake-up and position sensing functions, optimizing energy use and minimizing component redundancy while maintaining accurate displacement detection.
Implementation Method 1
The position sensor is configured to change in resistance based on a displacement of the magnetic component
Implementation Method 2
monitoring a magnetic field emitted by the magnetic component, wherein monitored characteristics of the magnetic field vary based at least in part on a displacement of the magnetic component
Data Source
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AI summary
Apparatuses and sensor systems are described with magnetoresistive sensor configurations. The method of detecting a displacement of a magnetic component includes monitoring, via a position sensor operating in a low-powered mode, a magnetic field emitted by a magnetic component. The monitored characteristics of the magnetic field vary based at least in part on a displacement of the magnetic component. The method also includes determining, via the position sensor, whether the monitored characteristics of the magnetic field satisfy an activation criteria. The method further includes increasing the power of the position sensor to a high-powered mode to determine the displacement of the magnetic component upon determining that the monitored characteristics of the magnetic field satisfy the activation criteria. Corresponding position sensing systems are also provided.