Pressure Gauge,Stress Gauge,Stress Indicator,Stress Monitor Jiangsu Pinpai Technology Co., Ltd. , https://www.jspingpa.com
I understand that many people may have questions about the recent changes in the standard for helmet impact testing equipment. In this article, I’ll provide a detailed overview of the new system and explain how it improves accuracy and reliability.
1. **Headform**: The new standard now requires the use of an aluminum-magnesium alloy headform, which is cast and pressed to meet the requirements outlined in Appendix A. Previously, wooden headforms were used, but wood can degrade over time, leading to inconsistent cushioning effects during testing. This could result in unreliable test results, especially for the same batch of samples. By using a metal headform, we eliminate this issue and ensure more precise outcomes. Our production process is strictly controlled to maintain the highest level of accuracy.
2. **Gantry System**: The gantry is designed to hold and release the falling hammer. It allows for adjustable height settings up to 1.1 meters, which exceeds the previous standard requirement of 1 meter. This flexibility ensures that the impact height matches the vertical spacing of different helmets, providing a more accurate simulation of real-world conditions. The system is easy to adjust, making it user-friendly for various helmet types.
3. **Drop Hammer**: The impact hammer weighs between 5.0 and 5.01 kg, with a hemispherical shape and a diameter of 96 mm, made from 45# steel. The puncture cone has a 60° angle, a tip diameter of 1 mm, and a total length of 40 mm. Some domestic manufacturers face issues where the cone rotates after release, leading to inaccurate positioning and reduced impact energy. We solved this by adjusting the center-of-gravity weight of the cone during production, ensuring it stays in place and delivers consistent results. This improvement enhances both the safety and accuracy of the test.
4. **Force Sensor**: The new standard specifies a dynamic force sensor with a measuring range of 0–20 kN and a minimum frequency of 5 kHz. The accuracy is ±0.02%, which is significantly better than static sensors commonly used by other manufacturers. Static sensors cannot capture the peak force accurately due to their low sampling rate. AQSIQ introduced this change to ensure reliable data collection. Our system uses advanced technology to handle the high-speed data acquisition, preventing crashes or malfunctions. After extensive R&D and expert collaboration, we’ve developed a stable and accurate system that provides users with trustworthy results.
5. **Base Design**: The base must be strong enough to support the load cell and prevent any unwanted movement. While the old standard required a concrete base, we found it impractical due to installation and maintenance challenges. Instead, we designed a fixed-type base that eliminates resonance, vibration, and buffering. This design has been well-received and proves our commitment to innovation and quality.
6. **Power Display Device**: Once the puncture cone makes contact with the headform, the system sends a signal to indicate the start of the test. This feature improves control and ensures smooth operation.
7. **Pre-treatment Procedures**: The new standard includes several pre-treatment methods that simulate real-world conditions. For example, helmets are exposed to UV light, low temperatures, high temperatures, and water immersion before testing. These steps help determine the long-term performance of the helmet under harsh environments. This shows the AQSIQ’s dedication to protecting workers’ safety. Our team supports these additions, as they make the testing process more comprehensive and realistic.
In conclusion, the updated standard brings significant improvements in accuracy, reliability, and safety. Through continuous R&D and strict quality control, we aim to provide users with not just equipment, but also confidence in the results.