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Signal Validation Service

Idea

The Signal Validation Service validates sensor time series data of an entity. The API offers a set of common operations for signal validation.

The service enables a user to analyze data based on custom settings, like thresholds or data window sizes. The service response can be used for special post-processing or alerting tasks.

Access

For accessing this service you need to have the respective roles listed in Analytics Services roles and scopes.

Basics

Time series data are used as input for signal validation. Depending on the property set, a time series consists of a timestamp and one or more related properties and values. If a time series has multiple properties, you have to define the property to be analyzed by the Signal Validation Service.

The Signal Validation Service can perform different checks on the data. Each check requires its own set of parameters. For example, the range check has parameters for an upper and lower limit for detecting range violations.

The validation output varies with the input, but is at least an event consisting of a description and a timestamp.

Features

The Signal Validation Service exposes its API for realizing the following tasks:

  • Detect range violations
  • Detect spikes
  • Detect noise
  • Detect jumps
  • Detect/interpolate gaps
  • Detect bias

Example Scenario

The manager of a brewery wants to detect some abnormal characteristics of the production line.

The manager collects time series data of a relevant sensor of the production line using the IoT Time Series Service. The manager feeds the Signal Validation Service API with this time series and evaluates the response.

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