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Table 5 Test results of violent opening event

From: Alarm method of communication intelligent manhole cover based on multiple event fusion

Input signal

Alarm event of violent opening generated

No alarm event of violent opening generated

Lock abnormal opening event generated

No lock abnormal opening event generated

Lock abnormal opening event generated

No lock abnormal opening event generated

The proposed method

Signal 1

F

F

F

F

Signal 2

F

F

F

F

Signal 3

F

F

F

F

Signal 4

T

T

T

F

Signal 5

T

T

T

F

The existing method

Signal 1

T

T

T

T

Signal 2

T

T

T

T

Signal 3

T

T

T

T

Signal 4

T

T

T

T

Signal 5

T

T

T

T