Alarm Motion Detector Tutorial

Author: Ari Erenthal, Published on Mar 06, 2017

Sensors designed to detect movement are a good way to protect large, open areas. In this tutorial, we examine motion detectors, including:

  • Passive infrared (PIR) detection
  • Microwave detection
  • Dual technology detectors
  • Movement profiles
  • Detection patterns
  • Look down protection
  • Pet immunity
  • False alarm prevention - the 9 key factors that increase false alarms
  • Motion detector selection guide - living room, living room with door, kitchen, commercial kitchen, skylight

******* ******** ** ****** ******** *** * **** *** ** protect *****, **** *****. ** **** ********, ** ******* ****** detectors, *********:

  • ******* ******** (***) *********
  • ********* *********
  • **** ********** *********
  • ******** ********
  • ********* ********
  • **** **** **********
  • *** ********
  • ***** ***** ********** - *** * *** ******* **** ******** false ******
  • ****** ******** ********* ***** - ****** ****, ****** **** **** door, *******, ********** *******, ********

[***************]

********

**** ********* ** ***** ******, ********** ****** *** ****** ** protection ** ****** *********. *** *******, ******** ** ********* **** detect ***** ** ******* ******* *** *******. ** ** **** practice, *******, ** **** * ****** ***** ** ********** ** case ** ******** ******** ** ******** ***** ********. **** ****** detectors ********** *** ******** ****** *** ******** ********** *** ********, it ** **** ****** **** ** ******** **** ** **** to **** ***** **********. ******** *** ****** ********* ********** **** other, ****** **** ********* **** *****. ***** **** *** ** the ***** ***** **** * ************ ******* *** ** **** to ****** *** ***** ******.

Passive ******** ********* (***) *********

*** ****** **** ******** ********* ** *** **** ** ****. Motion ********* *** ************* ******, ***** ****** *****, ** ****** **** ****. *** **** ***** ****** ********* use * **** ***** ** ****. ** ** ****** ***** in ***** ** *** **** ** *** ****, *** ****** of ******* ******** ********* **** ********, ******* *** ******* ** one **** ** ***** **** ******** ** *** ***** ****. As *** ****** ********* ** **** ** ***** ** *** other **** ** *** ****, *** ******** ********* ******* **** change *****, ******* *** ****** **** ** ***** ****** **** the *****. ****** ********* *** **** ********** ** **** * signal ** *** ***** *****.

*** ***** **** ******* *** *********** ********* ***** ******* ******** ahead. ****** ********* *** * **** **** ** **** ******* to ***** ***** ********* ***** *******, ******** ***** ********* ***** to ******* **° ** ** **** ** ***°, ********* ** model. ****** ********* *** * ******* ****, ***** ******* ***** much **** *********** **** * ******** **** ** ********** *********. This ****** **** **** ******** ********* ** ***** *** ****.

** ** ********** **** ********* ** ****** **** ** ***** detection ***** ******* ** *** **** ********* *****. **** ****** the ****** ******** ** ****** ******** **** ****** *** ****** the ********* ** ***** ******. *** **** ******, *** **** in ***** ** *** **** *** * ***** ****** ** facet-sections, **** ** ***** ********** ** ** *********** **** ** the ****.

Microwave

***** ******** ********* *** *******, ********* ******* ** *** ****** of ********** ******** *********, ********* ****** ******* *** ******, ******* radio ***** *** ********* *** **** ** ***** ** ****** back. ******* ** *** ****** ** **** *** ***** **** to ****** ** *** ****** *** *********** ** ****** *** cause ** ***** *********.

** ********* ********* ****** **** *******, **** *** **** ****** to ** ******** ** **** **** ************ ** ******* ******* systems. ********* ********* **** **** *********. ********* **** ******* ******* moving ******* ** **** **** *** ********, *** ****** *** lateral ********. ********* ********** **** *****, ***** ***** ***** *** sensor ** ****** ****** *** ****** ******. ********* ****** ********* metal, *** ***** ***** ******* ** ***** ** *** ******** could ****** * **** ****. ************, ********* ***** ****** ********* are ***** * **** ********** ******* ** * **** **********, which ** **** ****** ** ************* ********* *****, *** ********* less ****** ** *****.

Movement ********

** ** ****** ** *** **** ** ***** ******, ************* use ***********-******** ********** ******** (*****) ****** **** ******** ********. ***** microcontrollers *** ** ********* *** *** *** ********* ***** ***** into ********* ******, *** **** ** ***** ***** ****** ******* preprogrammed ********. *** ******* ** *** *************** ** ** *** intelligence ** *** ****** ********, ******** *** ******** ** **** the ********** ******* * ****** ******* ******* ** *** **** and * ***** ******** ******** *** ********* ****. ***** ********** and **** ************* ******** ******** **** ******** *** ****** ** false ******, *** *************** ***** **** *** *** ******* ***** alarms ** ********** ******.

Dual **********

** ********** ****** ** **** ** ******** ***** ******, **** installers ****** ** *** **** ********** ****** *********. **** ********** detectors *** *** ********* ********* ************, ******* ******* ******** *** microwave. *** *** ************ **** **** ** "*****" ****** ******** an ***** *********. ** ******, **** ** * **** *** for *** ********* ** *** ********** ** ********** *** *** weaknesses ** *** *****. *** ************** ** **** "*********" ******* from ************ ** ************, *** ********* **** ******* ** *******.

**** ******** *** ******** ********** ***** "*****" *** *********** **** are ****** **, *** *** ********* ********** **** **** ********** ignore *** ******* ** *** ********* ****. *** *******, * dual ********** ****** ******** ****** * ******* *** **** **** learn ** ****** *** ******** ** *** ***, ** ** only ***** *** ********* *** *** *** ***.

*** ****** ** ******** **** ********** ****** ********* ** **** just ******* *** ****** ******** **** *** ***** ******* **** not ****** *** **** **** *** **** ** ****** ******** for * ****** ********. *** *******, * ******** *** ****** a ***** ***** **** ** * ********* **** ***** *****, due ** *** **** ** *** ********* ** *** ***** reflecting *** *** *****. ********* *** *** ****** ******** **** a **** ********** ****** ******** **** ***** *** ***** ****** to ****. *******, *** *********** ******* *** *** **** ****. An ******** *** ********* ***** ****** *** ***** ** ********* may *** ***** *** ****** ******** ** ** **** * state ** *****, ******* ********* **** **** ****** **** **** closer ** ******* ****, *** ****** **** ***** **** **** to ****. *** ** *** ********** **** *** ****** ******* movement, *** *** ************** *** "*******" ** ****** ******** ** the ******* ** *** ********* **** **** ********* ****** ***** alarms. *** ****** ******** ** ******* *** *** ********* *** the *** ** **** ***** **** ****** *** ********** ********, but **** **** ***** ******, ********* *** **** ****** ***********.

**** ********** ****** *** **** ********** ********* ***********. **** **** dual ********** ****** ********* ****** ** ***, **** ** *** see *** *** ** ***** **** **** ** ********* ***** PIRs ***** *******. *******, **** *** ********* ****** ******* **% and **% ******* **** **** ********** *********. **** ******* ** low *** ***** *************, **** ****** $** *** *** ***** be *** ********** ******* * ********** ***** *** * *****-**** month.

Detection ********

*** ****** ********* ******* *** ******** ******** ****. ********** ****** be **** ** ***** *** ******** ******** **** ** *** specified *********** ** ******* ** ********. ********* ***** ********* ******* a **** ** ****** *** **, *** **** **** ****** a ******* ** *** ********* ***** **** ******** ** ****** common ******* ** ***** ******, *** **** ******** ******* ******** a **** ** ****** *** ***** **** ** *** ********* space. ****** * ******, * ****** ******** ****** ****** ***** out ** ******** *** ******* ****** **** * **** ******* to *** **, **** ** * ****.

*********, ***** * ****** ******** ***** *** * ******** ** 50' (**.** ******) ** * ***** **** ****** **** **** will ******* *********** **** **** ******** *** *****, *** **** prevent **** ********** ********* **** ***** **********, ** ***** *****:

***** * ****** ******** ** ******* ** **** ************* ******* than *** ****** ***** ******** ******** ** ****. *** ************** is ********* ** *** *** ******** ******. ***** ****** *** predicated ** *** ******** ***** * ******** ******** **** *** motion ********. ** ** ****** ** ************* ****** **** *** of *** ******** *** ****** ******** *** ** *** *******, it **** *** ** **** ** ******** **, *** **** motion ********* **** ************* ** **** ** ***** *****. **** can **** ** ************* **** ***** ****** **** ********* ******* such ** ******* ******** ** *** ******* ** *** ******** or ******** ***** ***** ** ******* *******.

****** ********* *** ********* ** ******* ********, **** ** ***** are ******** *** ******** *****. **** ****** ********* *** **********, and *** ******* ******** *****. ****** *** ******* ********* ***** by ******** *** *** ****, ***** ******* *** ********* **** pattern. *** **** *** ***** ** *** ********* **** ** clearly ****** ** *** ******, **** *****, *** ********* **** the *** ********** *** ****** ********. ********** ****** ** **** to ****** * ****** ******** **** * ********* **** **** matches *** **** ** ** ******* ** ******* ** ********.

Look-Down **********

**** ****** ******** ****** ******* ******** ****, **** ****** ***** zone **********. **** ** * ****** **** **** ******* *** pyro ******* *** **** ******* *** ****** ********, ********** ********* from ******* *** ****** ******** ** ******** ** *** *****. Many ****** ********* ***** **** ********** ** ** ******** ** locations **** **** ** ******* *******.

Pet ********

**** ********** ****** ********* ** ***** **** ****, ********** *** want ** *** *** ****** ****** *********. ***** *** *** types ** ****** ********* ******** ** **** ****** ****. *** tolerant ****** ********* *** * **** ************* ************** **** ** extensive ******* ** *** ****** *** ******** ********, ***** *** immune ********* ******* ************* *************** **** **** **********. ********* ********, pet ******** ********* ****** ** ********** *** ******* **** ******** under ** ****** (****), ***** **** ********** ********* *** *********** for **** ***** ****** (****). ******** ****, ********** **** *** other ******** ****, *** **** ***** **** **** ********** ********* impractical. *** **** ***********, *** ****** ****** ****** ******** ********.

********

**** ****** ********* ******* *********** **********. ** **** ** *** self-testing *******, *** ****** ******** **** ************ ******* *** **** to ****** **** *** ****, *****, ******* ******, *** ********** heat ** *** ********* **** *** *** *******. ** *** detector ****** ******* *** ****, ** ********* **** *** **** has **** ******* *** ***** * ******* ******. * ****** tactic ** ************ ******** ***** ** ** ******* *** ***** of * ******** ****** *** ***, ***** ** ** ********. The **** *** **** ***** ** ***** ***** ** ***** a "****-******" ** *** *** **** **. *** *** ** disable *** ***** ** ** ***** ****** *********, ** *** an ******* ** ***** ****, **** **** ** * ***** of *****, ******** *** ********. *********** ********** ****** *** **** to * *******, ** **** *** ***** *** ****** *** cover. **** ***** ******* **********, *** *** **** **** ** trained ** ********** ***** *** ********, *** ****** ** ********** to ******* ********** ** **** **** * ********* *****-**.

Mounting *******

*** ****** *** ******** ******** ** *** **************'* ******* ** predicated ** ** ******** ******** *** ********* **** ** ************* ways. **** ** **** **************** ** *** *** ********* ***** will ****** * ****** ******, ********* ** **** *****. *** that ******, *** *********** ******** ****** ** *** ******** **** be ******* **. ******** *** ******** *** *** *** ***** the ******** ** *********** *** ********, ******* ** ***** ******. Mounting ** *** **** **** ***** * ***** **** ***** the ********, **** ** *** ****** ******** *** * ***** zone.

Insects ******** ***** ******

******* **** ** ********* ** *** ****** ** * ****** detector *** **** **** ******. ******* ******** ****** ** *** inside ** *** **** ** **** *** **** **** ** interpreted ** ******. *********, *** ******** ** **** *** ***** in *** ****** ******** *******, ********* **** ********* *** ***** holes.

Heat ******* ******** ***** ******

****** ********* ****** *** **** **** ******* ** ********. ***** for ********** *** ******* ***** ****** ******** * **** ** mount *** ****** ********, *** **** *** ******** **** *** motion ******** *** ***** ** **** ***** * ******** ****** in *** ********* ****.

Reflective ******** ******** ***** ******

****** ********* ****** *** **** ********** ******** ** ********. ********** surfaces, ********** ******** ** ********* *****, **** ******* *** **** source, ***** *** ****** ******** *** ******** ** ******. **** reflected ***** *** ****** *** **** ********* ** *** **** sufficiently ** ** ******** ** ******. ******** *** **** ***** to **** ******* ****** *** ********* **** ************ ** ***** false ******, ** ***** ****** *** ****** ******** ******* ***** areas ** ****** ** ***** *******. ***** ******* **** *****, such ** ***** ** ******, *** **** ********* ***** *********** sufficient ** ****** *** ******** ******* ** *** ****.

Hanging ***** ******** ***** ******

*****, ********, ***** ********, *** ***** ******* **** **** **** the ******* *** *** **** ** ******* ****** ** ******* air ************ ** ******* *** *** ****** ******* ** ***** alarms. ******* ********* ** ******** **** ********** ****** ********* ** grocery ****** *** ***** ****** *********. ******* ******* *** ***** animated ******** *** **** ** ********** ** ****** *** ** profile ** *** ********* ****, ******* ** ***** ******.

Screw ************** ******** ***** ******

************** ** *** ******** ****** *** **** *** ******* ** the ****** ********, ***** ** **** *** **** *** **** plastic ******* ****, ********** ******** *** **** *** ***** ** the ********* ****. **** **** ** ***** ** *** ********** technician *** ** **** ** ***** *** ******* ** *** way.

Multiple ** ******** **** ******** ***** ******

*** ****** ****** ********* **** **** **** ****** **** *** tend ** **** ** *** *****, *** **** *** ** able ** ******* *** ******** *******, **** ** ****, ** multiple ******* ** *** ********* **** ** ****. *** *** customer ***** *** ****** *** *********** ** ***** **** ****** deciding ** *** * ****** ********.

Detection **** **** *** ******** ************ **** ********* ***** ******

****** ********* **** * *****, **** *******, **** ** * wall, ** ********* *******. *********, *** ** ********* ** *** detection **** *** ****** ** ********** ****, ******* ** ***** alarms.

Hot *****

****** ********* ******* * ********** ********** ** *.*°* (*°*) ** trip. *********, **** ****** *** ** **** ** ***** **** regularly *** **** ***. ** *** ******* ****** ********* ** locations ** **** ********* **** *** ***** ************ ** **°* (32.2°C) ** ****.

Selection *****

****** ****:********* ****** ******* ******, ********** ********, ***** ******. ************** ** Dual ********** ****** ******** **** ******** **********.

****** **** **** ***: ********* ****** ******* ******, ****** ***** ***, ********* ******. Recommendation ** *** ****** ****** ******** (*****) **** ***** **** disabled.

*******: ********* ****** ******* ****, ********** ********, **** **** ****, patio *****. ************** ** ***** ****** ******** ***** ****, ****** island, ****** **** **** ****. *** **** ********** **** *****-***** immunity.

********** *******: ********* ****** ******* *******, ********, ******* ******* **** *******, reflective ******** ************** ** ** ****** ****** ******** **** *** minimum ******** ******, *** ***** ***** ********. **** ******* ********** with ********.

********: ********* ****** ******* ******** ***** ** **** *** ********* to ***** ***** *** ***** ****, *** **** *** ****** light **** ******** ***** ******* ***** ****** ******. *************** ******* choose ****** ******** **** "*******" ****, ***** **** ******* * narrow **** **** ***** *** ********. ********* ****** ******* *** skylight **** ** ********, *** *** **** ** *** **** will ** *******.

Comments (6)

*** ** *** ** *** **** ******** ** ****** ********* I've ****. *'** **** ***** ****** ********* *** **** ** years *** **** *********** ********** ******** ****. **** *** ****** motion ********* **** **********, * *** ********* ** ***** *** then ***** **** ** ** ******** *** **** ***** **** of ** ********. *******, ***** **** **** ** **** **** cats *** ********. *** ***** ** **** ******** **** ** have ***** **** *********** ****** *********.

** *** ***** **** ** *** ****** *********, *** ** my ********, **** *** **** ** *** ****, **** * pet ****** *** ******** ** * ******* **** ****** **** an ******. * ******** *** ************'* ************ ** *** ******, but *** * ***** *****. * ******** ** *** *** and ********* *** ******** ** *** ******** *** ** *** hallway ***** ** *** *** *** **** *** ***** ****, also ****** *** * *** ****** ** *** ****. * walk ****** *** *** ****** ******** ****** ** ** **** fine. ** **** ***** ***** *****.

**** *******, *** **** ***** ******* *** ********* *** ** use ** ******* ****** ********* ************ ********** ** **** *** play ********* ********** ****** ****** (***** **** ** ******* *** to *** *******). **** *******.

** ** **********, ******* **** *** ******** ***** * *** false ****** ****** ***** ********* *********** ** ******** ** ***** tripping ** ******* *** ******* *****.

** ** ****, **** ********* ********* ** **** ****** ** other ******* **** *******, ***** ********* (*****/***** ****). ****** ***** radar (**:*********) ** ****-**** ******* ********* (**:**** ******* ********) *** ** * ****** ******** *** ********** ********** ****** inputs, ******** **** *** **** **** ********* **** *** *****.

******* ****** ********* **** ** ** *** **** ****** ****** the **** ** ******* ********* *** ***** ****** *********. ** would ******* *** ****** ******** ** *** *** *** **** the ****** ******* *********. *****, ** ******* ***** ****** **** timers. ** ** **********, ***** ****** ********* ** ***** ** good ** ***** * ***.

** *** ** **** ******* ****** *********, * ***** ********* you *** ********* **** ******** ****** **********, *****, *** **** detection **********.

**** ****, ***** *** ******* ****** ********* ******** ************ ** work **** ****, **** ** ***** *** **** ** ******* by ***- *** ******* **** ***** ** *** *******.

** *** **** *** ****** ********* *******, ******** ***** *****. This ***, *** *** ******* ** ***** ******** * ***** object **** ** * ***** ** ******* ******* *** *****. These **** ** ** **** ******** **** ***** ***** **** fewer (******** ** ****** *** ****) ***** ******.

**** ************ ** ********* **** *'** **** ****. ***** ***!

***** *******!

***** *** **** ** ******* ******* **** **** ****** *** outputs ** *** ** ******** *** ************* ** ******** ******. You *** *** **** ** ** **** ** ****** *** situation. *** *** ****** *** *********** ****** *** **** ** for **** ******* ***** ***** * ****** ** *** ** forgiving. * **** **** ******* ******* ** *** **** ** high ****** *****. ***** ** *** *** *** ******* ***** a *** ** **** ** ***** ********. *** **** ***** have "***** ******" ******* ** ***** *** ****.

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