Configuration for Measurement and Trigger Parameters of RadarImager#

taskMeasurement.measurement.radarSystem#

The Measurement and Trigger Parameters need to be configured based on the specific installation scenario and application requirements.

The RadarImager is designed to continuously record measurement data once activated. To generate an image from this data, a trigger signal is necessary. Upon receiving this trigger signal, the RadarImager captures the necessary data according to the configured image parameters and subsequently generates the image.

Overview of some Measurement Parameters:#

The imageTriggerMode parameter allows the use of either one or two trigger sensors. While the distance between the trigger sensors (Position 2) is currently not a factor, the distance between the target objects (Position 5) must always exceed the distance between the trigger sensors.

In the graphic shown, the objects move in the opposite direction to the default direction of movement. Therefore the parameter reverseObjectMovementDirectionX is set to true.

objectSpeedX#

This parameter sets a constant speed for the object being measured along the moving direction (x-axis). An increase in speed up to 1 m/s does not lead to any loss of quality in the image. It's important to note that increasing the speed parameter by more than 50% can lead to the termination of active image generations.

objectLengthX#

Sets the length of an object to measure in moving direction (x-axis). This will determine the length of the image.

This parameter sets the length of the object to be measured in moving direction (x-axis). The value of this parameter will determine the length of the generated image.

The images below show three images in which a different objectLengthX has been selected:

distanceZToDeepestLayerOfInterest#

This parameter sets the distance in the z-direction from the RadarImager to the deepest layer of interest in the object to be measured. It is recommended to keep this distance as small as possible to obtain the maximum resolution. This parameter also helps to cut off multi reflection effects from the background by limiting the image area from which individual layers can be selected.

offsetDistanceX#

This parameter sets the distance between the system reference line and the external image trigger sensor along the x-axis. Depending on the direction of movement, the reference line is always on the side that is reached first by a passing object. This parameter adds a software-based trigger delay, allowing an object to be captured in the center of the image.

The object of interest can be moved to the center of the image by adjusting the offsetDistanceX:

reverseObjectMovementDirectionX#

This parameter reverses the object movement direction compared to the default object moving direction along the x-axis.

See the image in the section offsetDistanceX for the default object movement direction.

Incorrect setting of this parameter leads to an incorrect image:

useExternalTrigger#

This parameter enables the external trigger signal from Trigger Port1 for object detection and image generation. If disabled, the external trigger signal will be ignored. This can be useful if you want to view a previously captured image for a longer period without it being updated by a newly captured image.

imageTriggerMode#

This parameter allows to select the mode for the image trigger signal to be detected by the image trigger sensor(s).

There are two modes available:

• IMAGE_TRIGGER_SIMPLE
  • Trigger Port1: Image trigger sensor.
  • Trigger Port2: Not connected.
  • For every active edge on the image trigger sensor an image is generated.

• IMAGE_TRIGGER_DIRECTION_SENSITIVE
  • Trigger Port1: Image trigger sensor.
  • Trigger Port2: Additional image trigger sensor.
  • This mode is used to avoid trigger generation for an object which is moving backwards.
  • To trigger image generation, the trigger sensor on Port2 must first be triggered and held, then the trigger sensor on Port1 must be triggered. Both trigger sensors must then be switched off again.

imageTriggerRisingEdgeDetection#

This parameter configures whether rising or falling edges should be detected by the image trigger sensors. Enabling the rising edge detection will trigger the image acquisition on the rising edge of the external trigger signal.

For falling edges the different image trigger modes behave as follows:

• IMAGE_TRIGGER_SIMPLE

• IMAGE_TRIGGER_DIRECTION_SENSITIVE