| Learning Notes |
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| Part 1 - View Slide |
- Sound travels from a source focused in a certain direction.
- As sound travels over distance, the waves spread from their source in a conical shape.
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| Part 2 - View Slide |
- The same physics apply to ultrasonic sensors where the path of sound is called beam width.
- Beam width is determined by the beam angle of the transducer, which is 8° to 12° on most ultrasonic sensors.
- The further the sound waves travel, the wider their footprint becomes.
- Think of beam width as the minimum free-space required for unobstructed reliable level measurement.
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| Part 3 - View Slide |
- Obstructions or obstacles do exist and ultrasonic sensors should be located away from them whenever possible.
- Obstacles inside the beam path can disrupt the acoustic signal and be falsely detected as liquid level.
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| Part 4 - View Slide |
- Flowline's Digital Signal Processing (DSP) technology creates a living map that identifies false obstacle reflections in the full beam path. DSP filters out false obstacle reflections and tracks the true level of liquid.
- Flowline DSP ultrasonic sensors have a 2" to 3" minimum beam width across the measurement range. This increases the sensors installation flexibility and enables reliable measurement in applications with restrictive space.
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