ISOFIX-Based Mounting Stand Fixation for Vehicle Test Stability
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Solution Overview
Problem
Conventional methods for fixing a mounting stand on a vehicle seat during performance tests are insecure in the front-back direction, prone to shifting or tilting, and complicate the fixing process due to varying vehicle types and structures under the seat and backrest, leading to increased operation time and risk of damage to vehicle parts.
Innovation Solution
The use of an ISOFIX anchor, conforming to international standards, allows for secure fixation of the mounting stand to the vehicle seat with a simple and adjustable extensible mechanism, ensuring strong contact with both the seating and backrest surfaces, regardless of vehicle type, thereby reducing the complexity and time required for fixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a belt is tightened to fix the mounting stand to the driver's seat, then the mounting stand is brought into close contact with the seating surface and fixed in vertical direction, but the mounting stand is not securely fixed in front-back direction and may shift or tilt
Solution Approach 1:
The fixing system is segmented into multiple independent fixing points (first fixing point on seating surface, second fixing point on backrest) connected by separate belts. This segmentation allows each belt to handle specific directional forces, with the first belt preventing vertical movement and the second belt preventing front-back movement, thereby securing the mounting stand without requiring an overly complex single-belt solution
Solution Approach 2:
The fixing solution transitions from a single-dimensional vertical fixation to a multi-dimensional fixation system. By adding the second belt connecting to the backrest, the system gains control in the front-back direction, creating a two-dimensional fixation plane that comprehensively restrains the mounting stand against multiple movement vectors
2Reliability
If connection points are increased to secure the mounting stand to both seating surface and backrest, then fixation security is improved, but the work of fixing becomes complicated and working time increases
Solution Approach 1:
The ISOFIX anchor serves multiple functions: it provides a standardized connection point that can be used across different vehicle types, replaces the need for multiple separate attachment points under the seat, and offers predetermined positioning that eliminates the need for operators to search for suitable connection points, thereby reducing fixing time while maintaining stability
3Strength
If the belt is tightened with strong force to secure fixation, then fixation strength is improved, but vehicle parts such as bars under the driver's seat may be damaged
Solution Approach 1:
The system uses the ISOFIX anchor, which is a standardized connection interface designed specifically to handle strong fixation forces. This standardized anchor point replaces fragile vehicle parts like under-seat bars, allowing operators to apply strong tightening force to the belts without risking damage to vehicle components, as the ISOFIX anchor is engineered to withstand such loads
4Adaptability or versatility
If the fixing method is adapted to different vehicle types by finding appropriate connection positions, then adaptability is improved, but the fixing operation becomes more complicated and operation time increases
Solution Approach 1:
The ISOFIX anchor provides a universal standardized connection point that works across different vehicle types. The first and second belts connect to this standardized interface, eliminating the need for operators to search for or adapt to different connection positions for each vehicle type. This universal interface maintains adaptability while dramatically simplifying the fixing operation
Data Source
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AI summary
A holding apparatus is adapted for holding a vehicle test device to be used for testing a test sample that is a vehicle or a part of the vehicle on a seat of the test sample, and includes: a mounting stand on which the vehicle test device is mounted; and a fixing mechanism configured to be connected to an ISOFIX anchor provided in the test sample to fix the mounting stand to the seat.