Crash Test Carriage Segmentation for Rapid Setup
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional crash simulation testing equipment requires extensive preparation time and high costs due to the need for stable constructions and multiple carriage arrangements, which increases mass and reduces dynamics.
Innovation Solution
The testing equipment features a second detachable carriage arrangement that can engage with the first carriage, allowing for preparation outside the equipment and reducing the total mass, with a fixed acceleration unit and sensors on the first carriage arrangement to minimize additional costs and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If multiple carriage arrangements are provided to enable quick interchange of test superstructures, then the preparation time is reduced, but the device complexity and total mass increase
Solution Approach 1:
The carriage arrangement is divided into two independent carriages (first carriage and second carriage) that can operate separately or together. The first carriage remains in the testing equipment while the second carriage can be prepared externally and coupled when needed, allowing quick interchange without replacing the entire carriage assembly.
Solution Approach 2:
The detachable clutch mechanism serves multiple functions: it can engage to transfer forces for acceleration, disengage to allow independent operation, and enable quick coupling/découpling of the second carriage. This universal coupling mechanism handles both force transfer and carriage interchange operations.
2Loss of time
If multiple carriage arrangements are provided to enable quick interchange of test superstructures, then the preparation time is reduced, but the cost increases
Solution Approach 1:
By segmenting the carriage system into a permanent first carriage and a removable second carriage, the expensive components (acceleration unit connection, measuring pickups) remain in the first carriage. The second carriage can be simpler and replaced economically without duplicating expensive components.
Solution Approach 2:
The second carriage acts as a temporary carrier that copies only the essential functions needed for quick interchange, while the first carriage maintains the expensive measurement and control infrastructure. This avoids duplicating costly components across multiple carriages.
3Speed
If the mass of the carriage arrangement is reduced to maintain high dynamics, then the acceleration performance improves, but the stability and reliability decrease
Solution Approach 1:
The system dynamically adapts its mass configuration: the lightweight second carriage is used when quick interchange is needed, while the detachable clutch ensures proper force transfer during acceleration. The first carriage remains as a stable base with all measurement equipment, providing reliability while allowing mass reduction during operation.
Solution Approach 2:
The detachable clutch acts as an intermediary that ensures reliable force transfer between the acceleration unit and the reduced-mass second carriage. This mediator component guarantees that stability and force transfer are maintained even though the operating carriage has reduced mass for better dynamics.
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 design enables quick introduction of test superstructures, reduces mass and costs, and maintains high dynamics by transferring forces and acceleration without the need for additional pallets or extensive recalibration, while ensuring safety with passive braking systems.
Implementation Method 1
an acceleration unit (120) via which a force can be transferred to the carriage arrangement (110; 140) in order to accelerate the carriage arrangement (110; 140)
Implementation Method 2
a thrust rod which belongs to an acceleration unit and which is driven by a hydraulic piston by means of a pressurized medium from a pressure reservoir
Implementation Method 3
a passive braking device which is designed for exerting braking forces on the first and/or second carriage arrangement (110; 140) without control in such a way that the first and/or second carriage arrangement (110; 140) comes to a standstill
Data Source
AI summary
A testing equipment for crash simulation tests is specified which has a rail arrangement, a first carriage arrangement which is arranged displaceably along a longitudinal axis of the rail arrangement, and an acceleration unit via which a force can be transferred to the first carriage arrangement in order to accelerate the carriage arrangement. With the aim of preparing parts to be tested outside the testing equipment, quickly introducing them into the testing equipment, and keeping low the overall mass composed of carriage arrangement including object to be tested, the testing equipment further has a second carriage arrangement, which can be mounted on the rail arrangement and can be displaced therealong and is designed to support a test superstructure with at least one component to be tested in the crash simulation. The first carriage arrangement further has a detachable clutch for transferring a force to the second carriage arrangement from the acceleration unit via the first carriage arrangement.