To perceive, detect, or become aware of something (often by sensing or inferring); can refer to both human intuition and instruments detecting anomalies.
センサーが微小な振動を察知した。
The sensor detected a slight vibration.
彼女は表情の変化をすぐに察知する。
She quickly notices changes in facial expressions.
上司は部下の不安を察知して声をかけた。
The boss noticed the subordinate's anxiety and spoke to them.