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LBT-HW-101A Safety Helmet Impact and Puncture Resistance Tester

Manufactured in accordance with GB/T 2812, EN 397, EN 812, and ANSI Z89.1, this equipment is primarily used to test the impact‑absorption performance and puncture resistance of safety helmets. It is widely employed by specialized labor‑protection‑equipment supervision and inspection stations, construction research institutes, construction‑project quality‑inspection agencies, power‑sector organizations, and safety‑helmet manufacturers.

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Safety helmet testing equipment

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lbt@lbt.ltd

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LBT-HW-101A Safety Helmet Impact and Puncture Resistance Tester

Description

Product Introduction

Host structure

1. The main structure of the equipment is constructed from two 80×40 European‑standard aluminum alloy profiles, offering an aesthetically pleasing appearance while ensuring the device’s stability and reliability.

2. The base is machined from a single piece of 45# steel, 10 mm thick, offering excellent impact resistance and enabling secure mounting of the force sensor.

3. Rail guidance is employed to ensure that the drop hammer’s axis coincides with the sensor’s axis, and the hammer’s impact point is centered on the safety helmet.

4. Height is adjustable; the impact height is electrically regulated, and the system automatically stops lifting once the set height is reached.

5. The puncture fixture is both movable and rotatable, meeting the requirements of multi-point puncture testing.

6. Electrically controlled latching and release; the latching mechanism is of a mechanical design, ensuring that it does not disengage when power is lost.

8. The type of test preconditioning can be selected via the touch screen and displayed in printed form.

9. Specifications may vary depending on the configuration; please refer to the actual configuration.

Measurement and Control System

1. The overall control system employs a PLC–touchscreen architecture, with all relevant operations performed via the touchscreen.

2. It employs a dedicated processing system that automatically acquires dynamic signals, processes the data, and generates outputs. It displays test curves and supports data printing.

3. The dynamic force sensor employs a U.S.-made PCB ICP‑technology transducer, offering high accuracy.

4. The touchscreen automatically displays and locks the maximum dynamic force value.

5. The sensitivity of the dynamic sensor can be calibrated via touchscreen input, making calibration convenient.

Reference standard:

GB 2811, EN397, EN812, ANSI Z89.1

Technical Specifications:

Name	Technical Specifications
Impact hammer	Material: 45# steel; mass: 5–5.01 kg (GB 2811, EN 397) or 3.6 kg ± 0.05 kg (ANSI Z89.1). The hammerhead is hemispherical, with a radius of 48 mm (EN 812 specifies a radius of 50 mm), made of 45# steel, and features a symmetrical, well-proportioned appearance.
Puncture hammer	Material: 45# steel; weight: 3–3.05 kg (GB 2811, EN 397) or 0.5–0.51 kg (EN 812) or 1 ± 0.05 kg (ANSI Z89.1); the penetration tip has a cone angle of 60°; the tip radius is 0.5 mm, or 0.25 ± 0.1 mm (ANSI Z89.1), with a length of 40 mm, a maximum diameter of 28 mm, and a hardness of HRC 45.
Sensor	Dynamic force sensor, with a measurement range of 0–20 kN / 40 kN / 50 kN, a frequency response of no less than 5 kHz, and an accuracy of 1.5%.
Data system	Sampling frequency: 20 kHz; sampling duration: 50 ms; lower limit of measurement: 500 N.
Impact height	0–1000 mm / 2000 mm / 3000 mm, selectable; electrically adjustable.
Descent speed	Top impact: 5.5 ± 0.05 m/s (theoretical height: 1,542 mm); lateral puncture: 5.0 ± 0.1 m/s (theoretical height: 1,274 mm); top puncture: 7.0 ± 0.1 m/s (theoretical height: 2,497 mm) (ANSI Z89.1)
Test headform (optional)	Headform No. 7 (medium size), made of aluminum–magnesium alloy, with a resonance frequency exceeding 3,500 Hz and a weight of 3.64 kg ± 0.45 kg (per ANSI Z89.1). (Optional) Three headforms—G, K—available, with head circumferences of 525 mm, 555 mm, and 585 mm, respectively. Constructed from aluminum–magnesium alloy, they feature a resonance frequency greater than 3,500 Hz (in accordance with EN 397 and EN 812). (Optional) Headforms No. 1 and No. 2, each weighing 5 kg ± 0.1 kg, with a height of 250 mm, fabricated from aluminum–magnesium alloy. (Per GB 2811) (Optional)

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