Lichtschranke LS 66 (Light Barrier LS 66)

Description

The LS 66 light barrier measures the velocity of a guided drop mass immediately before it strikes the specimen. It was developed for testing stab-resistant materials and is mounted directly on the guide frame of the drop tester, level with the specimen holder.

Two measuring planes are stacked on a shared mounting plate. Each plane consists of an infrared emitter and an opposing receiver; the distance between the two planes forms the fixed measuring base. The time between the two interruptions yields the impact velocity — and with it the test energy actually applied.

Design

The four sensor arms form a U-shape open to the front. Drop mass and test tool pass freely through the measuring field without touching the guide or restricting the test setup. Connection is made via a single connector at the rear of the mounting plate.

Integration

The signals from both measuring planes are recorded and evaluated by the Intelligent Measurement System IMS 8500. Every drop test can therefore be documented with a measured impact velocity instead of one calculated from the set drop height alone.

Applications

• Velocity measurement on stab resistance drop testers
• Determining the actual impact energy in drop tests
• Documenting standard-oriented test series with measured velocity
• Retrofitting existing drop test rigs