Measurement & Trigger Configuration (taskMeasurement)#

taskMeasurement.measurement.radarSystem#

These parameters describe how the RadarImager turns continuous measurement data into a triggered image:

• The RadarImager continuously records measurement data while active.
• An image is generated when the configured trigger condition occurs (see useExternalTrigger and imageTriggerMode).

Installation geometry overview#

The imageTriggerMode parameter defines whether one or two trigger sensors are used.

In the graphic above, the objects move opposite to the default movement direction. Therefore reverseObjectMovementDirectionX needs to be set to true.

objectSpeedX#

Sets the constant object speed along the movement direction (x-axis).

Higher speeds work well up to 1000 mm/s (1 m/s) without image quality loss. Changing this parameter by more than ~50% while images are being generated can cause an ongoing image generation to abort.

objectLengthX#

Sets the object length along the movement direction (x-axis). This value determines the length of the generated image.

Examples for different objectLengthX values:

distanceZToDeepestLayerOfInterest#

Sets the distance in z-direction from the RadarImager to the deepest layer of interest in the object.

• Keep this distance as small as possible for maximum resolution.
• Use it to cut off multi-reflection effects from the background by limiting the selectable depth range.

offsetDistanceX#

Sets a software trigger delay by defining the distance between the system reference line and the external image trigger sensor along x. This helps capturing the object centered in the image.

Practical setup tip: start with offsetDistanceX = 0 mm to make sure the object is visible, then increase/decrease it until the object is centered.

reverseObjectMovementDirectionX#

Reverses the assumed object movement direction along x compared to the default direction shown in the offsetDistanceX reference figure.

If this is set incorrectly, the measured object won’t be visible in the image:

useExternalTrigger#

Enables the external trigger signal on Trigger Port1 for object detection and image generation. If disabled, external trigger signals are ignored. (Current image won't be overwritten by the next measurement)

imageTriggerMode#

Selects how the trigger sensor signal(s) are interpreted. The used trigger edge (rising/falling) is configured via imageTriggerRisingEdgeDetection.

There are three modes available:

• IMAGE_TRIGGER_SIMPLE

  • Trigger Port1: image trigger sensor
  • Trigger Port2: not connected
  • Behavior: each configured trigger edge on Port1 generates an image

  

• IMAGE_TRIGGER_DIRECTION_SENSITIVE

  • Trigger Port1: image trigger sensor
  • Trigger Port2: additional image trigger sensor
  • Use case: suppress triggers for objects moving backwards
  • Behavior: Port2 must trigger first and be held → then Port1 triggers → then both release

  

• IMAGE_TRIGGER_SIMPLE_WITH_PULSED_SPEED

  • Trigger Port1: image trigger sensor
  • Trigger Port2: pulse generator (e.g. encoder) for live speed measurement
  • Behavior: each configured trigger edge on Port1 generates an image; Port2 is used to measure speed using pulses/m

encoderPulsesPerMeter#

Specifies how many encoder pulses per meter are generated by the belt/object movement. This is used for live speed measurement.

encoderUseBothEdges#

Configures whether the encoder signal is evaluated on one edge or on both edges.

• If enabled, rising and falling edges are counted.
• If disabled, only one edge is counted, defined by imageTriggerRisingEdgeDetection.

encoderPulsesPerMeter always describes the physical encoder pulses per meter. When encoderUseBothEdges = true, the RadarImager counts two edges per pulse, effectively resulting in 2 × encoderPulsesPerMeter counts per meter.

Example: with encoderPulsesPerMeter = 1000 and encoderUseBothEdges = true, the device evaluates 2000 edges/m.

imageTriggerRisingEdgeDetection#

Configures whether rising (true) or falling (false) edges are detected for the trigger inputs. This must match the electrical behavior of the used sensor(s) and wiring (active-high vs active-low).

If falling edges are selected, the trigger modes behave as follows:

• IMAGE_TRIGGER_SIMPLE

• IMAGE_TRIGGER_DIRECTION_SENSITIVE

See also#

• Generate First Image
• Configuration
• Performance Estimation
• Performance Estimation Tool