Helmet Acceleration Impact Puncture Tester Motorcycle Helmet Impact
Testing Machine
1. Product Description
Application: GB2812 standard helmet acceleration impact puncture
tester is suitable for helmet impact performance test, and is used
to judge the impact resistance of helmets. This machine adopts
HOTOTECH's self-developed upper computer control system,
automatically lifts the fixture to a predetermined height, and
displays the height in real time, and displays the acceleration
Peak value, test curve, impact speed, action time, impact energy,
etc. in real time on the operation interface. At the same time, it
can meet the puncture test, and only needs to replace the fixture,
which is easy to operate.
| The base is made of reinforced concrete, and its mass is not less
than 500 kg |
| The numerical analysis system consists of force sensors, uniaxial
acceleration sensors, data processing, display and recording, etc.;
it can be used for force measurement and impact |
| The total height of the machine | about 4.2 meters
|
| The weight of the impact hammer | 5.0+0.1kg, hemispherical impact surface, radius 50±1mm, made of
stainless steel
|
| Impact height | 1000±5mm
|
| Contains force sensor, measuring range (0~20000)N, minimum
frequency response 5KHZ |
| Force sensor |
Impact anvil
| flat anvil (diameter (130±3)mm, thickness more than 15mm,
hemispherical anvil radius (48±1)mm, hardness not less than HRC50 |
3. Impact Test Steps
a) Determine the headform to be used according to the requirements
of Appendix A
b) Wear the sample on the headform according to the manufacturer's
instructions
c) Install the acceleration sensor in the ball head and connect it
to the sliding arm through the ball arm
d) Install the flat shoe and make the helmet body just contact with
the flat shoe
e) Adjust the free fall distance from the contact point to the flat
shoe to (1380±5) mm
f) Release the headform and record the peak acceleration and
cumulative time
g) Select another point of the sample to just contact with the flat
shoe
h) Repeat (e) to (f)
i) Install the hemispherical shoe and make the helmet body just
contact with the hemispherical shoe
j) Adjust the free fall distance from the contact point to the flat
shoe to (1020±5) mm
k) Release the headform and record the peak acceleration and
cumulative time
l) Select another point of the sample that just touches the
hemisphere
m) Repeat j)~k)
Technical specifications of puncture test
1. Weight of puncture hammer: 3.0+0.05k
2. Angle of puncture hammer point: 60±0.5°
3. Puncture cone: length 40 mm, diameter 28 mm
4. Puncture cone tip radius: 0.5 mm
5. Hardness: 50 to 45HRC
6. Puncture height: 1000±5mm
Main machine performance features:
1. Servo motor, servo controller and its supporting control unit
are used as drive components, and the motor has a long life.
2. Hollow gear reduction system is used, which has low power
consumption, low noise, high efficiency and strong reliability.
3. Zhongtai data acquisition card is used to keep the accuracy of
the test machine unchanged for a long time.
4. The direct plug-in transmission device is used to achieve high
positioning accuracy, long life, low friction, high-speed operation
and forward and reverse rotation, so that the whole machine can run
horizontally,
displacement, and speed accuracy are greatly improved.
5. It has a position limit function, so that some position limit
requirements The test required is safer and faster.
6. Extremely wide measurement range, applicable to the standards of
multiple countries.
7. Adopting the integrated design principle, no matter what the
configuration of the host is, modify the corresponding computer
parameters (parameters can be permanently retained),
no circuit adjustment is required.
8. High-precision return positioning function, no matter what the
return speed is, it can accurately return to the starting position,
speed up the test speed, and improve work efficiency.
9. Common parameter memory function, such as test speed, etc., so
that it is in this parameter state as soon as it is turned on,
which greatly facilitates users.
10. Flexible and convenient operation, with two working modes of
constant movement and inching movement, users can freely set it
conveniently to adapt to different occasions or habits.
11. It has multiple protection functions: adjustable upper and
lower limit protection, emergency stop protection, etc.
