Vehicle Ultrasonic Sensor Frequency Grouping for Faster Updates
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Solution Overview
Problem
Existing vehicle ultrasonic sensors using a single frequency face challenges with reduced response and update times due to signal interference among multiple sensors, leading to prolonged measurement and data update times.
Innovation Solution
A vehicle ultrasonic sensor control system that employs a plurality of ultrasonic sensors driven at different frequencies, utilizing a control unit to set guard-bands and adjust sensitivity based on environmental factors and sensor characteristics, including pre-mapping and diagnosis to ensure accurate data reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single frequency is used for all ultrasonic sensors, then device complexity is reduced, but response time and data update rate deteriorate due to signal interference among multiple sensors
Solution Approach 1:
The patent applies parameter changes by assigning different operating frequencies to different ultrasonic sensor groups. The control unit dynamically adjusts the frequency parameter of each sensor group to eliminate signal interference, thereby improving response time and data update rate without significantly increasing system complexity
Solution Approach 2:
The patent segments the ultrasonic sensors into multiple groups, where each group operates at a different frequency. This segmentation allows parallel operation of multiple sensors without mutual interference, resolving the contradiction between simplified control and fast data update
2Loss of time
If multiple frequencies are assigned to ultrasonic sensors, then response time and data update rate improve, but device complexity increases due to frequency management and guard-band requirements
Solution Approach 1:
The control unit acts as an intermediary that manages frequency allocation among sensor groups. It automatically assigns frequencies and configures guard-bands, simplifying the overall system complexity while enabling multi-frequency operation for improved response time
Solution Approach 2:
The system performs preliminary frequency planning by dividing sensors into groups and pre-assigning frequencies with appropriate guard-bands. This preliminary configuration reduces real-time management complexity while maintaining fast response capabilities
3Measurement precision
If guard-bands are increased to prevent frequency interference, then measurement precision improves, but frequency utilization efficiency deteriorates
Solution Approach 1:
The patent applies partial action by setting guard-bands only where necessary between adjacent frequency assignments. This selective approach ensures measurement precision is maintained while avoiding excessive guard-band widths that would reduce frequency utilization efficiency
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 approach reduces data update times and costs by allowing accurate and efficient sensing through frequency modulation and compensation, enhancing the responsiveness of ultrasonic sensors.
Implementation Method 1
an ultrasonic transducer generating ultrasonic waves
Implementation Method 2
a plurality of ultrasonic sensors are mounted on the outside of the vehicle; and a control unit setting a plurality of driving frequencies with a guard-band formed in between and controlling a control module so that the plurality of ultrasonic sensors emit and receive ultrasonic waves
Implementation Method 3
The control module may include a filter with a cutoff frequency set to filter the received ultrasonic waves
Data Source
AI summary
The present invention discloses a vehicle ultrasonic sensor control system including an ultrasonic sensor including an ultrasonic transducer generating ultrasonic waves and a control module controlling driving frequency of the ultrasonic waves emitted from the ultrasonic transducer, wherein a plurality of ultrasonic sensors are mounted on the outside of the vehicle; and a control unit setting a plurality of driving frequencies with a guard-band formed in between and controlling a control module so that the plurality of ultrasonic sensors emit and receive ultrasonic waves having driving frequencies different from each other.