Using PIRs + Cameras Guide

Author: Brian Rhodes, Published on Sep 23, 2012

Combining PIR motion detectors and surveillance cameras is a common way of improving how well cameras can 'see' in low light and alert against potential intruders. In the note below, we address the best ways to incorporate motion detectors with surveillance cameras, contrast the options, and discuss where best to use each type.

Why PIRs?

******** ***** ******* **** *** ******* ****** ** * *********** weakness ***** ** **** *******: *** ***** **********. **** ******* on ***** ****** *********, *** *********** ** **** ** *** well *** ****** '****' ** *** *****. ** * ****** produces **** ***** ******* ** ********, **** *** ******'* ****** detection **** ******* ****** ** ****.

*** ****** ** ********** *** ********** ** ** *** ** pair *** ****** **** * *** - ******* ******** - motion ********. **** **** ******* ** ******** *****, **** *** ********** **** ** ********* ***** ******* ** detect ******** **** ** ***** ********. ******* *** ****** ******* heat *********, ** ** *** ********* ** ******* ***** *** operation. **** **** **** *******, *** *** *** ** **** to '********' ******* ********* ** *** ****** *** ** **** to **** ** ******* ************ ** ********** ******, ******* ********** a '********' ** **** *******.

3 ***** *******

*** ***** ***** ***** *** ***** ***** ***** *** *********** is ******** *****:

****** ******* *** ****** **** ******* ** ***** ***** ****. In *** ******* *****, ** ******* ***** ******* *** ******* where **** ****** ** **** ** **'* ******** *********.

  • ****** *: *** ******, **** ******** ******:**** **** ** ******* *** **** ** ********* ** * normal ***** ****** **** *** ****** **** * ****** ****** in *** *******. ** * ****** ** *** ******** **** factor, ***** ***** *** ***** ******** ** '***' ** '******' units, ******* *** ********* *** **** ****** *** **** ** just **** ** *** ***** (***-*****) ******. *******, ***** ***** *** typically **** **********. *** ******* ******* *** ******** *** **********, black/white ****, ** '***** *****' **** *****, *** ** ********* producted ** ***** ******. **** ***** ** **** ******** *** designed ** ** ***** ***** ****** **** **-***** ******* ****. When ********* ***** ***** ** **** ** * ******* ************ system, **** ****** ** ***** ** ******* ***** ******* ***** and *** ********** **** ***/*** *****.
  • ****** *: ******, **** ******** *** ******:******* ** **** ***** *** ******** ******* *****, *** **** the ******** ** ** ******* *** ****** *****. **** ****** in ********* ***** ** **** *******, *** ***** ******** ******** a *****-***** *** ** * ****** ** ********* '*** *****' coverage ** **** *********, *** ***/***** *******. *******, ***** *** camera *** ** ****-********, *** ******* *** ** ******* ** short, ***** ****** *** *** ******* *******.
  • ****** *: ******* ****** **** ******** ****: **** ** **** ****** ****** *** ** ******* ** select **** ****** *** *** ********* ** *** ***********. **** method ****** ** *** *** ***** ***** ** * ******'* I/O ****, *** ***** **** **** *********** *** ****** *** be ******* **** *** ***. **** *********** ****** ****-*****, ******* proofed ******* ** ** ******* **** ******* ******* - * combination *** ***** ** *** ***** *** *******. **** **** one *** *** ** ***** ********, ******* ********** ******** ******** or ***** **** ********* ** * ****** ********** ******.

Cost *********

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*** ******, **** ******** ******

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  • ********** (*******/**) **-***: */*, *** *** ****** ******, * **** PIR ***** ** ** - ** ****. ****** ****:~$*** ******
  • ***** *******: *****, *** *** ****** ******, * **** *** range ** ** - ** ****. ****** ****:~$*** ******

******, **** ******** *** ******

*** ***** ***** *** ******** ** **** ****** *** ********** cameras ** **** **** *** *** ***'****' **** ******. **** **** ******* *** *** ***** *** **** ************ deployments, *** *** ****** ****** ***** ****** *********** *****.

  • ******* ******: **** ******, *******, ********* *.*-**** ****, ******* ** LEDs, * **** *** ***** ** ** - ** ****. Indoor ****:~$*** ******
  • ******* ***: **** ***** *** */* *******, ** **********, **** or **** *******, * **** *** ***** **** - ** ****. ******/******* *****:~$**** ******

******* ****** **** ******** ****

*** ***** ****** ***** *** ******* ** ******* **** ******* with ************ *******. **** *** ******* *** ******; ** ******* or *********** **** ***** ******** ** ******** ******** *** *** listed. ***** *** ******* ** ***** *********, *** ***** ****** below *********** **** * ***** ******* ** ********* ******, ******** zones, *** ***** ******.

  • ***** ***-*** *******: **/** ***/** *******, ** ** * ************ zones *** ***' *********. ******** ***** ******* *** ******* *** other ****. ******* *****:~$*** ******
  • ***** ******: *****/** *******, ****** ****, **' * **' ******** area. ** ** **** ***** ******* *** ******* *** ***** PIRs. ******* *****:~$*** ******
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