Main indicators of helmet impact testing machine:
1. Concrete foundation: the quality is not less than 500kg;
2. Head mold: It should meet the requirements of Appendix A of GB 2811-1989;
3, the impact gantry: should be able to lift and release the weight, so that it is free or directed to the falling test rig;
4. Steel hammer: It should be uniform and symmetrical, and the quality is 5+0.10kg. Its head is half-spherical with a radius of 50mm ± 1mm ??and a chord length of not less than 75mm;
5, test analysis system: consists of load cell, signal amplifier and data processing, display, recording and other instruments.
The frequency response range is from 0 Hz to 5000 Hz; the force measurement range should meet the requirements of 6.4.1; the measurement accuracy is ±2.5%.

Main indicators of penetration resistance of helmet impact testing machine：
1. Head mold: It should meet the requirements of Appendix A of GB 2811-1989. The conductive mold should be set above the basic line of the head mold and connected to the contact indicator with wires.
2, concrete base: the quality is not less than 500kg;
3, impact gantry: should be able to lift and release the steel cone, making it free or directed to the falling test rig;
4, steel cone: made of steel, mass 3kg, cone angle 60 ° ± 0.5 °, cone tip radius of 0.5 mm ± 0.1mm,
Cone height 38mm, taper tip hardness HRC55～HRC60, steel cone is also connected to the contact indicator by wire;
5. Contact indicator: When the steel cone and the conductive surface of the head mold establish electrical contact, the contact indicator should indicate that the response time should be less than 0.5 ms.

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