Detector Modules

The four detectors can be combined in detector modules. The modules manage logic between one or two detectors. Furthermore, the modules define when a detector takes on one of three states:

1. Activated: When a detector is activated, movement in the field can be registered.
2. Triggered: The detector has registered activity of the right type (e.g. the right direction) and in an extent that indicates that the movement comes from a road user (and not just noise in the image).
3. Flagged (results in the detection of an event) When the detector has been triggered for a number of consecutive frames, an event is registered and saved in a log file.

RUBA consists of a single module (one detector), a double module (two detectors), and an exclusive module (two detectors).

Single

Consists of one detector type (presence/movement/stationary/traffic light). An event is saved in a log file when the criteria are met according to the specifications of the chosen detector.

Figure | Example of a single module. The single module lets the user create one detector of one's own choice per module

Double

Consists of two optional detectors. An event is detected and saved in the log file when both detectors have been triggered within a specific time distance defined by the user.

Figure | Example of a double module. The double module lets the user create two detectors of one's own choice per module

The timewise relation between the two individual detectors can be defined in two ways. ´Interval timing´ can be used to define the maximum time gap between the two detectors are triggered or stop being triggered. For instance, the time can be defined as the the interval from a vehicle enters one detector and another vehicle enters the other detector. ´Overlap timing´ is used when the two detectors should be activated simultaneously. It is possible to define a buffer so that events can be registered if the detectors are activated almost at the same time. Detailed information on the timing options is given in the log files and timing section.

Exclusive

Similar to the double module, the exclusive module consists of two optional detectors. An event is detected and saved in the log file only when the main detector is triggered and the excluding detector is not. If both detectors are triggered, an event is not created.

Figure | The Exclusive module is triggered when the main detector is triggered and the excluding detector is not.