Vehicle Speed Control Unit for Adaptive Drive Support
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Solution Overview
Problem
Existing drive support devices for vehicles often require drivers to operate under strict conditions, leading to a psychological burden due to significant differences between indicated target speeds and current traveling states, which can result in feelings of stress and discomfort.
Innovation Solution
A drive support device that includes a vehicle speed sensor, infrastructure communication unit, position calculation unit, and target vehicle speed control unit to determine a reference target vehicle speed range based on relative positional information and signal cycle data, setting an indication upper limit speed and indicating a target vehicle speed range that is more aligned with the driver's current speed, reducing the need for steep acceleration and minimizing stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the drive support device indicates a target vehicle speed range based on strict calculation to ensure passing the traffic signal on green light, then the reliability of traffic signal compliance is improved, but the driver experiences psychological burden due to significant difference from current speed
Solution Approach 1:
The patent applies parameter changes by introducing an indication upper limit speed parameter that modifies the target vehicle speed range based on current vehicle speed. When the calculated target speed range exceeds the indication upper limit speed, the system adjusts the indicated range to be lower, thereby reducing the psychological burden on drivers while still maintaining reliable traffic signal compliance through the green light.
2Measurement precision
If the drive support device sets a narrow target speed range to ensure precise traffic signal timing, then the precision of signal timing is improved, but the device complexity increases due to multiple calculation conditions
Solution Approach 1:
The patent applies preliminary action by pre-defining the indication upper limit speed based on current vehicle speed before calculating the final target vehicle speed range. This preliminary calculation simplifies the overall control logic by establishing a speed ceiling in advance, reducing the complexity of multiple conditional calculations while maintaining precise signal timing through the structured approach of calculating reference target range first, then applying the upper limit constraint.
Data Source
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AI summary
A drive support device that supports driving operation of a vehicle, includes: a vehicle speed sensor that detects a current vehicle speed of the vehicle; a target vehicle speed control unit that calculates a reference target vehicle speed range of the vehicle, that sets an indication upper limit speed on the basis of the current vehicle speed detected by the vehicle speed sensor, and determines a target vehicle speed range that is a speed range lower than or equal to the indication upper limit speed on the basis of the reference target vehicle speed range; and a target vehicle speed indicating unit that indicates the target vehicle speed range determined by the target vehicle speed control unit.