Datasheet

Page 7

Web: www.maxbotix.com

PD11500c

MaxBotix

Inc.

Patent 7,679,996

HRXL-MaxSonar

WR/WRC

™

Series

MaxBotix Inc., products are engineered and assembled in the USA.

Operations and Timing

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Most Likely Filter (MB7369 and MB7389)

In general, the HRXL-MaxSonar-WRM will select the largest target from its field of view and report its range. Even so,

objects up close may provide significantly greater returns than distant objects. Users are encouraged to test the sensor in

their application to verify usability.

The HRXL-MaxSonar-WRM sensors are equipped with filtering firmware which allows the sensor to ignore smaller

targets and noise, and still report the target that gives the largest acoustic return. (The sensor will also reject periodic

noise, even noise that has a higher amplitude than the acoustic return from the target.) This gives users the flexibility to

consistently range larger targets in the presence of clutter and noise. If the largest target is removed from the field of

view, the HRXL-MaxSonar-WRM will switch to the target that gives the next largest detectable return.

The MB7369 (RS232) and MB7389 (TTL) were designed for applications where users were concerned with ranging the

distance to large flat targets (such as in a water tank). This stands in contrast to the MB7360, MB7367, MB7380 and

MB7387 sensors which will report the distance to the first detectable target.

The Most-Likely filter is designed to report the distance to the largest acoustic return while ignoring smaller targets.

When targets are of similar amplitude reflections, preference is given to the closest target.