Banner Q5X Series - Dual (Intensity + Distance) Mode; Dual Mode Reference Surface Considerations

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ADDITIONAL INFORMATION
6. Additional Information
6.1. Dual (Intensity + Distance) Mode
Dual TEACH mode, dual intensity + distance window, expands the applications the Q5X can solve by combining distance-based detection with
light intensity thresholds.
In background suppression (DYN, 1-pt, 2-pt) and foreground suppression (FGS) TEACH modes, the Q5X sensor compares changes in the
measured distance between the sensor and target to control the output state. In dual TEACH mode, the user teaches the Q5X a fixed reference
surface, and the sensor compares intensity and distance readings against the reference surface it was taught. After teaching the reference target,
the displayed value is calibrated to 100P, or a 100% match. When an object enters the sensor’s field of view, the degree of consistency with the
reference surface becomes lower and causes a change in sensor output.
In dual mode, you can detect when the target is present at the right distance and when it returns the right amount of light. This is useful in
error-proofing applications where you need to know not only that the part is present (distance), but also that it is the correct part (intensity).
In dual mode, the Q5X requires a reference surface (far left). Once taught, the distance and intensity of the reference surface are recorded and
used as a baseline. A user-adjustable switching threshold is set, and changes in distance and/or intensity outside the switching threshold creates
a sensor output change. The example uses a 90% (90P) match condition with a 10% change in intensity and/or distance from the reference
surface required to change the output state. The default-switching threshold is a 50% match to the reference condition (50P); this sets the
threshold 50% from the distance and intensity of the reference surface. A transparent object can be detected either by a change in intensity,
distance, or by a double peak reflection (far right).
Figure 1: Dual Mode Example
The Q5X sensor can be taught non-ideal reference surfaces, such as surfaces outside of the sensor’s range, very dark surfaces, or even empty
space. These situations may enable applications requiring a long range detection but are subject to typical diffuse mode detection challenges.
6.2. Dual Mode Reference Surface Considerations
Optimize reliable detection by applying these principles when selecting your reference surface, positioning your sensor relative to the reference
surface, and presenting your target.
The robust detection capabilities of the Q5X allows successful detection even under non-ideal conditions in many cases. Typical reference
surfaces are metal machine frames, conveyor side rails, or mounted plastic targets. Contact Banner Engineering if you require assistance setting
up a stable reference surface in your application.
1) Select a reference surface with these characteristics where possible:
◦ Matte or diffuse surface finish
◦ Fixed surface with no vibration
◦ Dry surface with no build-up of oil, water, or dust
2) Position the reference surface between 200 mm (20 cm) and the maximum sensing range.
3) Position the target to be detected as close to the sensor as possible, and as far away from the reference surface as possible.
4) Angle the sensing beam relative to the target and relative to the reference surface 10 degrees or more.
Reference Condition
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10% Switching
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100% matched distance + Intensity after Dual teach
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Change in Intensity
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Output switches with intensity change
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Change in Distance
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Change in Distance and Intensity
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Output switches with intensity and distance change
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Reduced Intensity and/or Second Peak
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Output switches with intensity and/or second peak (Clear Object Detection)
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