1. Main purpose:

Is mainly used for R & D and production of fire safety helmets. The product can effectively test the helmet's impact absorption performance and penetration resistance. Widely used in fire research institutes, helmet manufacturing enterprises, quality inspection units.

Second, the instrument features:

1. The instrument realizes microcomputer automatic control. Adopt a special processing system to automatically collect dynamic signals, process and output data. The instrument has a printing function (optional)

2. Adopt German imported high-precision dynamic force sensor, measuring range 20KN, accuracy 1.0%

3. Adopting non-magnetic leakage adsorption structure, the drop hammer and puncture cone can automatically locate the center position of the helmet

4. Test head mold: special mold casting No. 1 and No. 2 metal head molds, in line with the specific provisions of the standard, can be repaired after impact, which is much better than the old standard wooden head mold.

5. The whole machine adopts European standard aluminum profile, frame structure, more stable; the electrical circuit adopts built-in type, beautiful structure, with modern technology sense and texture.

6. Impact height: 1000mm, vertical spiral handle to adjust the height. The height adjustment is convenient and easy to control; the height measurement is simple and intuitive, which greatly improves the test efficiency and accuracy.

7. Free replacement of falling hammer and puncture hammer, easy to operate

8. LED digital display, accurate to 1N, automatically record and lock the peak value of impact force.

9. Protection system: The newly designed surrounding metal protection net and installation link fixing method greatly reduce the possibility of accidents during the test and further improve the safety of the test operation.

10. The bottom is equipped with a horizontal test device to ensure that the test is at a level and improve the accuracy of the test.

11. Impact method: using free-fall form, which simulates the actual site in use, avoids complex speed compensation with guide rails or guide-drops, and ensures the accuracy of the test.

Third, the main technical indicators:

1. Head mold: 1 2 # magnesium aluminum alloy test head molds each, the quality of the head mold is 5.0kg ± 0.1kg, and the remaining dimensions and parameters conform to the provisions in Appendix A of GB / T2812-2006

2. Impact bench: a test bench capable of lifting and releasing the weight to free or guide it to fall;

3. Drop weight: The shape should be uniform and symmetrical, and the mass should be kg. Its head is hemispherical, the radius is 50mm ± 1mm, and the chord length is not less than 75mm;

Piercing cone: made of steel, mass kg, cone angle 60 ° ± 0.5 °, cone tip radius 0.5 mm ± 0.1mm, cone height 38mm, cone tip hardness HRC55 ～ HRC60;

4. Bottom steel plate: 300mm * 300mm, thickness 25mm, and placed vertically on the concrete base.

5. Drop height: 1m (distance from hammer head to cap top)

6. Force sensor: measuring range 0-20KN, frequency corresponding to 5kHz smaller, dynamic force sensor, accurate to 1N

7. Base: It has anti-impact strength and can firmly install the load cell.

8. Power-on display device: When the circuit forms a closed loop, an alarm signal can be issued to indicate that the puncture cone has contacted the head mold, and its response time should be less than 0.5 ms.

9. Working power: AC220V, 50Hz

4. Meet the standard:

GA44-2004 fire helmet