PASSIVE SENSOR WITH WIRELESS TRANSMISSION

摘要

A sensor (10) is disclosed, which uses a transmission principle beyond RF-signals and which sensor doesn't need an electrical circuitry. The principle is based on indication means, which built by a contrast interface (32) contrasting two mediums and which contrast interface is readable by sound or radiation. Advantageous embodiments of the present inven­tion include an amplification system via micro channels (20) or a micro gear, which transform a change of length with a very high accuracy and resolution. In a further embodiment a compensation of temperature does not influence the measurement of a force.