Sensor Node Alignment Using Magnetic and Acceleration Sensors
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Solution Overview
Problem
Existing sensor nodes require additional sensors like compass and slope sensors to align peripheral devices such as sector antennas and cameras, increasing complexity and cost, while needing a method to measure and align directions and slopes effectively for improved target detection performance.
Innovation Solution
A sensor node control system utilizing a 2-axis magnetic sensor and a 3-axis acceleration sensor to calculate azimuth angles and slopes, and a sensor control unit to filter and amplify magnetic and vibration values for accurate target detection and sensor alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional sensors (compass sensor, slope sensor) are mounted in the sensor node to measure direction and slope, then the target detection performance is improved, but the device complexity increases
Solution Approach 1:
The magnetic sensor and acceleration sensor are designed to serve multiple functions: they not only detect targets but also measure the sensor node's direction and slope for alignment. This multi-functionality eliminates the need for separate compass and slope sensors, resolving the contradiction between improved detection performance and reduced device complexity
Solution Approach 2:
The patent combines the direction and slope measurement functions with the existing magnetic sensor and acceleration sensor, merging multiple sensing capabilities into already-present components rather than adding separate dedicated sensors
2Reliability
If peripheral devices (sector antenna, camera) and additional sensors are mounted in the sensor node, then the target detection performance is improved, but the manufacturing cost increases
Solution Approach 1:
Existing magnetic and acceleration sensors are made multi-functional to perform both target detection and orientation measurement, eliminating the need for additional expensive sensors and reducing overall manufacturing cost while maintaining improved detection performance
Solution Approach 2:
The sensor node uses its own existing sensors (magnetic sensor and acceleration sensor) to perform the alignment function that would otherwise require separate compass and slope sensors, making the system self-sufficient and reducing component costs
3Measurement precision
If sensors are aligned based on measured direction and slope, then the target detection precision is improved, but the operation complexity increases
Solution Approach 1:
The sensor node automatically performs alignment using its own measured direction and slope data without requiring external alignment equipment or complex manual adjustment procedures, improving precision while simplifying operation
Solution Approach 2:
The system uses feedback from the measured direction and slope to automatically adjust sensor alignment, creating a closed-loop system that improves precision without increasing operational complexity
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
Enables efficient measurement and alignment of sensor node directions and slopes, improving target detection performance by determining the optimal orientation of sensors like cameras and antennas, and detecting vibrations and magnetic field changes.
Implementation Method 1
a 2-axis magnetic sensor and a 3-axis acceleration sensor, and may detect a target approaching the sensor node
Implementation Method 2
a 2-axis magnetic sensor and a 3-axis acceleration sensor, and may detect a target approaching the sensor node
Implementation Method 3
a sensor control unit to filter and amplify magnetic values and vibration values for accurate target detection and sensor alignment
Data Source
AI summary
An apparatus and method for controlling a sensor node are provided that may calculate an azimuth angle and a slope of the sensor node using a 2-axis magnetic sensor and a 3-axis acceleration sensor, and may detect a target approaching the sensor node. The apparatus may include a calculation unit to calculate an azimuth angle and a slope of a sensor node, based on a magnetic values measured by a 2-axis magnetic sensor and a acceleration values measured by a 3-axis acceleration sensor; a sensor control unit to filter the magnetic values and the vibration values and to amplify the filtered magnetic values and the filtered vibration values, when the azimuth angle and the slope are calculated; and a detection unit to detect a target based on the amplified magnetic values and the amplified vibration values.