Sensor Power Frequency Control to Reduce EMI False Targets
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Solution Overview
Problem
Electronic control devices face challenges in reducing electromagnetic interference (EMI) and preventing false targets and noise floor rises in noise-sensitive sensor modules, which are not adequately addressed by existing spread spectrum techniques.
Innovation Solution
An electronic control device comprising a sensor unit, a power supply unit, and a controller that adjusts the frequency of the spread spectrum in each operation period of the sensor unit, allowing for precise frequency management and minimizing external influences on the sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If spread spectrum technique is applied to reduce EMI, then electromagnetic interference is reduced, but false targets are created in sensor operation range
Solution Approach 1:
The patent applies dynamics by making the spread spectrum frequency adjustable and variable rather than fixed. The controller dynamically changes the frequency of the spread spectrum signal based on sensor operation requirements, allowing the system to adapt between EMI reduction mode and accurate sensor detection mode, thereby preventing false target creation while maintaining EMI reduction capabilities
Solution Approach 2:
The patent changes the frequency parameter of the spread spectrum signal dynamically. By adjusting the frequency parameter according to sensor operation conditions, the system can avoid creating false targets in the sensor's operation range while still providing EMI reduction benefits when needed
2Object-affected harmful factors
If spread spectrum technique is applied to reduce EMI, then electromagnetic interference is reduced, but noise floor rises
Solution Approach 1:
The system dynamically adjusts the spread spectrum frequency based on real-time sensor operation conditions. When sensor measurement is prioritized, the frequency is adjusted to minimize noise floor impact. When EMI reduction is prioritized, the spread spectrum is activated at frequencies that minimize interference while managing noise floor effects
Solution Approach 2:
The frequency parameter of the spread spectrum signal is changed dynamically to optimize the balance between EMI reduction and noise floor management. By varying the frequency parameter, the system can avoid fixed frequency conflicts that cause noise floor rises while maintaining effective EMI reduction
Data Source
AI summary
The disclosure relates to an electronic control device and method. According to the disclosure, an electronic control device comprises a sensor unit receiving a reception signal detecting an object and processing the reception signal to obtain object information, a power supply unit supplying power to the sensor unit and processing a signal for a predetermined frequency, and a controller adjusting a frequency processed by the power supply unit in each operation period of the sensor unit.