Electronic Control Device Phase Synchronization for Radiation Noise Suppression
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Solution Overview
Problem
Existing electronic control devices and sensor systems face challenges in effectively suppressing radiation noise, particularly in in-vehicle systems where multiple sensors operate with varying power consumption patterns, leading to significant voltage fluctuations and increased radiation noise.
Innovation Solution
An electronic control device connected via a cable to multiple sensors, which includes a power supply unit, an acquisition unit to measure radiation noise, a phase difference decision unit to determine optimal phase differences for each sensor's data acquisition cycle, and a control unit to transmit these phase differences, thereby synchronizing sensor operations to minimize radiation noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple sensors operate simultaneously with varying power consumption patterns, then data acquisition coverage is improved, but voltage fluctuations increase and radiation noise is generated
Solution Approach 1:
The patent implements periodic action by dividing sensors into multiple groups that operate in alternating cycles. Each group activates for a predetermined period, then deactivates while the next group activates. This periodic grouping ensures that total power consumption remains within a predetermined threshold, preventing voltage fluctuations and radiation noise generation while maintaining continuous data acquisition coverage across all sensors over time.
2Productivity
If all sensors operate at the same time, then complete data acquisition is achieved, but voltage fluctuations exceed the threshold and cause radiation noise
Solution Approach 1:
The patent applies periodic action by implementing time-divided operation cycles where sensors are activated in sequential groups rather than simultaneously. Each group operates for a predetermined time period, ensuring that the aggregate power consumption during any given period remains within the predetermined threshold. This prevents voltage fluctuations from exceeding the threshold that would cause radiation noise, while maintaining overall data acquisition productivity through continuous cycling.
Solution Approach 2:
The patent implements dynamics by making the sensor operation schedule adaptable and adjustable. The control device can dynamically modify which sensors are grouped together and their activation timing based on varying power consumption patterns and threshold requirements. This dynamic grouping and scheduling allows the system to optimize data acquisition rates while continuously maintaining power consumption within safe thresholds, preventing both voltage fluctuations and radiation noise.
Data Source
AI summary
An electronic control device is connected via a cable to each of a plurality of sensors which outputs a sensor output for each data acquisition cycle determined in advance in accordance with a clock signal. The electronic control device includes a power supply unit configured to supply power to the sensor via the cable, an acquisition unit configured to acquire a feature amount directly or indirectly indicating a magnitude of radiation noise from at least one sensor among the plurality of sensors, a phase difference decision unit configured to decide a phase difference of a data acquisition cycle for each of the plurality of sensors based on the feature amount, and a control unit configured to transmit the phase difference to each of the plurality of sensors.