Vehicle Distance Sensing Power Control for Low-Energy Operation
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Solution Overview
Problem
Existing active safety systems in electric vehicles consume excessive electrical energy during distance detection, reducing the vehicle's endurance capacity.
Innovation Solution
An active distance measuring device that dynamically adjusts transmission and detection power based on vehicle speed, using a controller to manage the detection wave transmitter and reflected wave receiver, reducing power consumption while maintaining sensitivity and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the detection wave transmitter and reflected wave receiver operate continuously at high power to ensure measurement sensitivity and accuracy, then the measurement precision is improved, but the energy consumption increases
Solution Approach 1:
The patent applies dynamics by making the transmission power and detection power adjustable rather than fixed. The controller dynamically changes power levels based on vehicle speed conditions, switching between high power (when vehicle speed exceeds threshold) and low power (when vehicle speed is at threshold or below). This resolves the contradiction by adapting power consumption to actual measurement needs rather than operating continuously at maximum power.
Solution Approach 2:
The patent changes the power parameter based on vehicle speed conditions. When the vehicle speed signal indicates speed exceeds the first threshold, the controller increases both transmission power and detection power to maintain measurement precision. When vehicle speed is at or below the threshold, the controller reduces power consumption. This parameter adjustment strategy resolves the contradiction between maintaining measurement quality and reducing energy usage.
2Measurement precision
If the transmission power and detection power are increased to maintain measurement accuracy at high vehicle speeds, then the measurement precision is improved, but the energy consumption increases
Solution Approach 1:
The patent implements periodic adjustment of power levels based on vehicle speed conditions. The controller continuously monitors vehicle speed signals and periodically switches between high power mode (when speed > threshold) and low power mode (when speed ≤ threshold). This periodic adaptation ensures measurement accuracy is maintained only when necessary, reducing unnecessary energy loss during low-speed operation.
3Reliability
If the active safety system operates continuously to provide real-time distance monitoring, then the reliability is improved, but the energy consumption increases
Solution Approach 1:
The patent makes the active safety system's power operation dynamic rather than static. The controller adjusts transmission and detection power levels based on real-time vehicle speed signals, ensuring reliable distance monitoring when vehicle speed exceeds the threshold while reducing power consumption when vehicle speed is at or below the threshold. This dynamic operation maintains safety reliability when needed while conserving energy during normal driving conditions.
Data Source
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AI summary
An active distance measuring device (100) includes a detection wave transmitter (110), a reflected wave receiver (120) and a controller (140). The detection wave transmitter (110) is configured to transmit the detection wave (D) with a designated transmission power to be reflected to form a reflected wave (R). The reflected wave receiver (120) is configured to operate at a designated detection power to receive the reflected wave (R) and generate reflected wave information accordingly. The controller (140) is electrically connected to the detection wave transmitter (110) and the reflected wave receiver (120), to control the detection wave transmitter (110) to transmit the detection wave (D) and receive the reflected wave information, so as to obtain distance information based on a transmission state of the detection wave (D) and the reflected wave information. The controller (140) is further configured to receive a vehicle speed signal to adjust the designated transmission power and designated detection power according to the vehicle speed signal.