Abstract: The invention relates to a system for monitoring technical installations, comprising symbols (1) that are provided on parts of technical installations to be monitored in a surrounding area; at least one camera (2) that acquires image data of the surrounding area and applies spatial coordinates and a recording point in time thereto; an image database (4) in which the image data are archived; a symbol library (5) in which a plurality of symbols (1) and rules assigned thereto are stored; and an object recognition unit (3), which is designed to recognize symbols (1) in the image data and compare these to the symbols (1) stored in the symbol library (4), wherein a spatial coordinate is assigned to a symbol (1) when the symbol (1) is recognized in the image data, a comparison to earlier image data of the surrounding area is carried out, and an alarm is triggered when a rule that is assigned to the recognized symbol (1) is not adhered to.

Abstract: The invention relates to a device for monitoring mechanical connection points in an installation, in particular in a wind turbine, having: at least one optical imaging device, which is designed to digitally capture optical images of one or more connection points repeatedly, in particular regularly or continuously; and a comparison device for comparing images with reference images or for comparing parameters of the images with reference parameters and for generating an error signal relating to the connection point reproduced in an image as soon as the deviations of the image from a reference image or of a parameter from a reference parameter exceed a specified threshold during imaging. Monitoring of mechanical connection points can thus be automated and systematised, and maintenance costs can be reduced. Operation of the monitored installation is also made safer.

Abstract: A system for monitoring a rolling element bearing including the rolling element bearing (1) and at least three temperature sensors. The at least three temperature sensors include a first temperature sensor (2) positioned in the environment of the rolling element bearing (1) to detect an environmental temperature; a second temperature sensor (3) positioned at a highly loaded region (9) of the rolling element bearing (1), preferably adjacent to a rolling surface of the rolling element bearing (1), to detect a load temperature; and a third temperature sensor (4) positioned at a less loaded or unloaded region (10) of the rolling element bearing (1), preferably adjacent to a rolling surface of the rolling element bearing (1), to detect an idling temperature. The system includes an evaluation device (5) that is configured to evaluate the state of the rolling element bearing (1) based on detected temperatures.

Abstract: The invention relates to a device for monitoring mechanical connection points in an installation, in particular in a wind turbine, having: at least one optical imaging device, which is designed to digitally capture optical images of one or more connection points repeatedly, in particular regularly or continuously; and a comparison device for comparing images with reference images or for comparing parameters of the images with reference parameters and for generating an error signal relating to the connection point reproduced in an image as soon as the deviations of the image from a reference image or of a parameter from a reference parameter exceed a specified threshold during imaging. Monitoring of mechanical connection points can thus be automated and systematised, and maintenance costs can be reduced. Operation of the monitored installation is also made safer.