Micro And Macro Detection And Setup - Jorjin MM5D91-00 Installation Manual

MM5D91-00-InstallationGuide-D01

3. MICRO AND MACRO DETECTION AND SETUP

As the radar is sensitive to small motion, other vibration objects such as air conditioner and
curtain will easily affect the detection performance. User needs to take special precaution
when doing radar installation.
In the presence detection solution, there is a macro and micro detection mode.
Figure 3-1. Presence Detect state diagram
When the detection is in absence state, it would check the marco level. If marco level is higher
than marco threshold, macro trigger confirmation count will increase by 1. If confirmation
count exceeds macro trigger delay, state would transit from absence to presence.
For presence state, state remains in presence when micro level is higher than the micro
threshold. When the micro level is lower than the micro threshold, absence count will
increase by 1. If absence count exceeds micro valid, the state would go back to absence.
If there are vibration objects inside the detection area, the micro value will keep at high level.
Resulting in not able to switch to absence state when no one is in the detection area anymore
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