Inspection of coins

Thorough inspection of all key features

Prior to the launch of new coin series, their basic design and quality characteristics must be thoroughly examined. Only this ensures that coins are smoothly identified in payment transactions, clearly distinguished from one another, and processed without disruption. Particularly relevant in this context:

• Geometric properties: diameter, thickness, edge height, reeding or edge embossing
• Mass
• Core material and coating: composition, density, thickness, etc.
• Surfaces: depth and shape of embossing, roughness, etc.
• Electrical and magnetic properties

Measuring methods matched to requirements

Fraunhofer IPM has a wide range of methods, measuring instruments, and laboratories for measuring these properties. The methods used can be adapted to the relevant features and quantities.

For small quantities, we use straightforward and robust measuring equipment such as micrometer screw gauges or precision scales. In addition, we use more elaborate methods such as laser scanning microscopy and 3D computer tomography. We also have a laboratory for material preparation, where we can produce cross-sectional micrographs of the coins.

For larger quantities, we use optical systems and imaging techniques that enable automated analysis of surfaces and 3D structures. Thanks to their high precision and speed, the systems can quickly and comprehensively inspect geometric features and surfaces, even in large quantities, and detect defects – if required, with 100 percent inspection directly in production.

Fraunhofer IPM provides expert advice on the measurement methods best suited to your specific requirements. Coin inspection is carried out in our laboratories. When inspecting larger quantities using our automated measuring devices, we adapt these to the respective inspection task.