Electric Linear Motor Crash Test Drive System
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Solution Overview
Problem
Conventional test systems for simulating vehicle crashes are often inaccurate, time-consuming, and inconvenient to use, particularly in ensuring the safety and compliance with regulations such as Whiplash IIWPG and FMVSS, due to limitations in controlling the motion of test bodies during impact tests.
Innovation Solution
A device and method utilizing an electric linear motor for exclusively mechanical driving of a test body mounted on a mounting unit, ensuring the test body remains fixedly connected throughout the investigation, allowing for precise control of acceleration and deceleration patterns, and enabling faster, more accurate data collection without the need for hydraulic or pneumatic systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional test systems are used to simulate vehicle crashes, then the test setup is simple, but the accuracy and precision of crash simulation are insufficient
Solution Approach 1:
The patent replaces conventional hydraulic or pneumatic drive systems with an electric linear motor system. This substitution enables precise control of the mounting unit's motion, allowing accurate reproduction of crash scenarios while eliminating the complexity of fluid power systems. The electric linear motor directly converts electrical energy to linear motion, providing both simplicity and high precision in controlling test body acceleration and deceleration profiles.
Solution Approach 2:
The patent implements a dynamic control system where the electric linear motor can vary the acceleration and deceleration rates of the mounting unit in real-time. This allows the test system to simulate different crash scenarios (e.g., different impact speeds, angles, and force profiles) by programming various motion curves, thereby improving measurement precision without requiring multiple complex mechanical setups.
2Productivity
If conventional test systems with hydraulic or pneumatic systems are used, then the device structure is established, but the time required for system recalibration is excessive
Solution Approach 1:
By replacing hydraulic or pneumatic systems with an electric linear motor system, the patent eliminates the need for complex fluid pressure calibration procedures. The electric system can be rapidly reprogrammed to adjust acceleration and deceleration parameters, reducing recalibration time from potentially hours to minutes or seconds, thereby significantly improving productivity.
Solution Approach 2:
The patent allows rapid change of test parameters (acceleration rates, deceleration rates, impact velocities) through software control of the electric linear motor. Instead of physically adjusting mechanical components or fluid pressures, operators can modify digital parameters, enabling quick adaptation to different test requirements and reducing system recalibration time.
3Reliability
If the test body is not fixedly mounted on the mounting unit, then the mounting flexibility is high, but the reliability of data collection during impact is reduced
Solution Approach 1:
The patent merges the test body and mounting unit into a single integrated system where the test body is firmly fixed to the mounting unit. This integration ensures that the test body moves exactly as the mounting unit is driven, eliminating relative motion or detachment during impact. The electric linear motor's precise control capability allows this rigid connection to be maintained while still enabling flexible test configurations through programmable motion profiles.
4Measurement precision
If conventional drive systems are used to accelerate the test body, then the system is easier to manufacture, but the control precision of acceleration and deceleration patterns is insufficient
Solution Approach 1:
The patent replaces conventional mechanical or fluid-based drive systems with an electric linear motor system. While electric linear motors are commercially available and relatively straightforward to integrate, they provide superior control precision through electronic feedback and programmable drive circuits. The system can accurately reproduce complex acceleration and deceleration patterns required for realistic crash simulation, achieving high measurement precision with manageable manufacturing complexity.
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
The solution provides a highly controlled and precise simulation of crash tests, improving the reliability and efficiency of vehicle safety testing, reducing the time required for system recalibration, and enhancing user convenience while ensuring compliance with safety regulations.
Implementation Method 1
an electric drive unit adapted for mechanically driving the mounting unit and the test body mounted thereon during the entire investigation, wherein the electric drive unit comprises an electric linear motor
Data Source
AI summary
A device for investigating a test body, wherein the device comprises a mounting unit for fixedly mounting the test body during the entire investigation, an electric drive unit adapted for mechanically driving the mounting unit and the test body mounted thereon, and a control unit adapted for controlling the electric drive unit to accelerate the test body mounted on the mounting unit, wherein the device is adapted so that the mounting unit and the test body mounted thereon are mechanically driven exclusively by the electric drive unit, wherein the electric drive unit comprises an electric linear motor.