Monitoring device and monitoring method for detecting a diagnostic state

A monitoring device for determining a diagnostic state of an industrial machine, comprising:

• at least one measurement transducer for generating at least one first signal characterizing a vibration of the industrial machine in a time period and for generating at least one second signal characterizing the vibration of the industrial machine in the same time period,
• wherein the at least one measurement transducer has at least one signal processor for evaluating the at least one first signal as a first characteristic value and for evaluating the at least one second signal as a second characteristic value, and
• wherein the first characteristic value and the second characteristic value form a characteristic value tuple,
• the monitoring device further comprising a storage unity in which different diagnostic states describing a state of the industrial machine are saved, wherein the different diagnostic states are determined as a function of the characteristic value tuple, and a predefined scalar range is saved with predetermined different fixed scalar values which define respectively an existing limit potential,
• wherein a respective limit potential characterizes a change in the diagnostic state of the industrial machine,
• wherein between adjacent limit potentials a diagnostic partition is formed, and wherein different scalar values from the predefined scalar range are assigned to different diagnostic partitions, and
• wherein the different diagnostic partitions respectively represent the different diagnostic states of the industrial machine, and
• wherein the monitoring device further comprises at least one interpolation function, the monitoring device being configured to use the at least one interpolation function to map the characteristic value tuple onto a common unique, time-dependent scalar value in the predefined scalar range, so that by way of the time-dependent scalar value a time-dependent monitoring of the diagnostic state of the industrial machine is achieved.