First, the instrument introduced according to the latest national standard helmet GB / T 2812-2006 "helmet test methods", used for the detection of helmet shock absorption performance testing and helmet puncture resistance test, widely used in special labor protection products Supervision, Inspection Station , Building Research Institute, construction inspection station, the electricity sector and the helmet manufacturer. Second, the detailed parameters ● impact hammer: the quality of 5-5.01kg, hammer hemispherical radius of 48mm, made of 45 # steel ● puncture cone: the quality of 3-3.05kg, piercing section cone angle of 60 °, cone tip diameter 1mm, the length of 40mm, maximum diameter of 28mm, hardness HRC45 ● drop height: 1000mm, drop height adjustable ● measuring system: the dynamic force of the sensor, measuring range 0-20KN, corresponding to the minimum frequency 5kHz, the whole range within ± 2.0%, with an accuracy of 1N ● 1 # 2 # aluminum-silicon alloy special headform test each one (in line with GB / T 2812-2006 Appendix A of the regulations) ● Solenoid release point can be arbitrarily up and down as needed adjustable ● Bench: automatic suction by closing the solenoid controlled suspension and release impact hammer, hammer puncture ● base: with impact strength, can securely mounted load cell ● puncture alarm: When piercing cone mold when contact head , the device sounds an alarm whistle while flash tips ● LED digital display, accurate to 1N, automatically save maximum force; three, in line with standard GB / T 2812-2006 "helmet test method", GB / T 2811-2007 " helmet "