Mechanical shock
A mechanical shock is a short-lasting, one-time acceleration impulse in one direction.
Shock tests are of particular importance in touch screens, especially for outdoor applications such as ticket machines or ATMs.
The problem of vandalism is particularly evident with these devices. A special construction with Impactinator® glass as monolithic glass or laminated glass creates particularly robust and impact-resistant touchscreens. However, mobile devices are also subject to mechanical shock, which are subjected to shock when they touch down on the ground or fall down.
The purpose of mechanical shock tests is to test conditions on touchscreens that may occur during transport or subsequent use.
The focus of the test is on a possible deterioration of the properties. The loads are generally higher than expected in real use.
The shock impulse is characterized by the specification of the
- magnitude of the pulse,
- nominal duration of the pulse,
- the number of shocks that occur.
It should be noted that the shape of the pulse is a decisive feature in the test procedure.
The ball drop test is used to determine the single-ring resistance and flexibility of the surface of a touch screen under rapid deformation.
Ball drop tests are carried out according to the following standards:
The second test of mechanical environmental tests is the drop test. The drop test is a process of short-term dynamics with extreme nonlinearities in loading, material behavior, contact and deformation.
All devices with touch applications that can be dropped (e.g. mobile applications, handhelds) or knocked over (e.g. desktop devices, diagnostic devices) are qualified in this regard.
