Dynamic Reference Value Adjustment for Vehicle Door Entrapment Detection
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Solution Overview
Problem
Conventional door entrapment detection devices interfere with the scheduled operation of vehicles due to fixed reference values that do not account for varying conditions such as vehicle states and operations, leading to erroneous entrapment determinations.
Innovation Solution
A door entrapment detection device with a dynamic reference value setting unit that adjusts based on surrounding states, vehicle operations, and specific conditions like congestion levels, vehicle speed, and route sections, using a sensor and rotation detector to accurately determine entrapment without additional sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed reference value is used for door entrapment detection, then the detection threshold is simple and consistent, but erroneous determination occurs under varying vehicle conditions, interfering with scheduled operation
Solution Approach 1:
The reference value is changed dynamically based on vehicle conditions including door closing speed, vehicle speed, acceleration, and route information. This allows the detection threshold to adapt to varying operational contexts, reducing false positives while maintaining detection reliability.
Solution Approach 2:
The system changes the reference value parameter based on multiple vehicle state parameters such as door closing speed, vehicle acceleration, and route section. By adjusting the reference value according to these parameters, the system achieves accurate entrapment detection across different operating conditions without interfering with scheduled operations.
2Reliability
If the reference value is adjusted based on multiple vehicle conditions, then detection accuracy improves under varying conditions, but the system complexity increases
Solution Approach 1:
The reference value setting unit serves multiple functions: it receives various vehicle state inputs (door closing speed, vehicle speed, acceleration), determines appropriate reference values based on these inputs, and outputs the adjusted reference value for entrapment detection. This multi-functional approach consolidates complexity into a single versatile component.
Solution Approach 2:
The system uses feedback from vehicle state sensors (speed, acceleration, door position) to continuously adjust the reference value. This feedback mechanism allows the system to adapt to changing conditions automatically, maintaining high detection accuracy without requiring complex manual intervention or multiple separate control systems.
Data Source
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AI summary
To provide a door entrapment detection device (10) and a door entrapment detection system that limit interference with a scheduled operation of a vehicle (1), a door entrapment detection device (10) includes a determination unit (42) and a reference value setting unit (43). The determination unit (42) (determination calculation unit) determines whether a door entrapment state is present based on a comparison result between an output value from a sensor (11) configured to detect rotation of a rotary body (12) provided at a leading end of a vehicle door (3) and a reference value (determination value) serving as a criterion for determining whether the door entrapment state is present. The reference value setting unit (43) (setting unit) changes the reference value determined by the determination unit (42) based on at least one of a surrounding state of the vehicle door (3) or an operation of the vehicle door (3).