Security Camera
Input Setup
Artificial
Intelligence (AI) security cameras are specialized network IP cameras that
perform advanced analytical functions such as vehicle
detection, person detection, face detection, traffic
counting, people counting, and license plate recognition (LPR). These
artificial intelligence functions are achieved using highly advanced video
analytics software that is built-in to the camera and recorder they are
connected to. AI cameras can be used as a stand-alone device by recording to an
SD card, or they can be connected to a network video recorder
(NVR) to create a multi-camera AI system that records to a central hard
drive. Please note that only certain models are capable of license plate
recognition / automated number plate recognition (ANPR).
A special
characteristic some network video devices possess is an integrated input &
output ports. This incorporation allows for the communication and interaction
of external devices, such as but not limited to:
1.
Doorbells
2.
Switches
3.
Alarm
System Relay
4.
Pressure
strips
5.
Detectors
(frequency, smoke, movement, sound, temperature, and humidity sensors)
All these
functions can be achieved via:
1.
NVR/DVR
(remote or local)
2.
Application
through a smart device (Tablet or Phone)
3.
Computer
(local or remote / software or browser)
Camera / DVR / NVR Alarm Input
Motion
sensors / motion detectors can be integrated with video surveillance systems to
provide additional security for buildings and also outdoor areas. For example,
a PIR sensor (passive infrared) can be connected to the alarm input of a security
camera DVR or IP camera NVR to trigger video recording
and send an alert to the property owner that motion has been detected in a
certain area.
When
motion is detected by the motion sensor, it triggers the following alarm
actions.
1.
Trigger
video recording on the camera associated with the alarm.
2.
Enable
the alarm output on channel one, where I have an alarm light attached (turn the
strobe light on).
3.
Pop-up
live video of the camera associated with the alarm on the DVR’s display
monitor.
Here are
some additional actions that can be triggered from an alarm input.
1.
Capture
a still image snapshot.
2.
Send
a push notification to the mobile app for iPhone & Android.
3.
Enable
the alarm buzzer on the DVR / NVR.
4.
Send
an email notification.
The inputs and outputs can be used to eliminate unnecessary recording of
video or coincide with your alarm system to systematically create a reliable
and accountable security source. When input and output mechanisms are
triggered, you can (manually or automatically) request through the network
video device that certain actions be performed over the network as well as
trigger devices attached to the output ports. Example:
This example picture above shows
a person interrupting a sensors function. This creates a signal that travels to
the camera and the camera computes the message. The camera then functions as
programmed and starts recording (snapshots or footage) to the delegated device
while simultaneously triggers a relay to close. When the relay closes, it
completes the circuit for the siren or strobe to activate. Another
configuration (as long as the cameras capable), have the camera record to the
desired method based on motion and simultaneously trigger the relay to set off
the siren. In this example, a motion sensor is taken out of the equation.
Again, the above picture shows only one
of many configurations. You can configure in whatever method you desire.
Including or excluding recording methods based off of:
·
Motion
(movement takes place)
·
Masking
(the camera has been covered or obstructed significantly)
·
Video
Loss (picture is no longer materializing, this feature is more prone to
function correctly via a recorder or program)
Other
devices that can be attached and configured to your I/O ports are as follows:
|
Device Type
|
Description
|
Occurrence of activation
|
|
Entry Contacts
|
Simple magnetic sensors detecting
opening of doors, windows, gates and shutters.
|
When the circuit is broken (door is
opened) the camera can record and/or send a snapshot and notifications
|
|
Motion Sensors
|
A sensor that detects motion either
based on heat, light, or frequency
|
When motion is detected, the sensor
breaks the circuit and the camera can record and/or send a snapshot and
notifications
|
|
Glass Break or Glass Shock Sensor
|
A sensor capable of distinguishing
the sound/vibration of breaking glass and/or splintering wood.
|
When glass is disturbed or
shattered, the glass sensor breaks the circuit and the camera can record
and/or send a snapshot and notifications
|
|
Pressure strip or switch
|
A pressure or switch sensor that
are needed to interact with before gaining entry or exiting a premise or
structure
|
When the sensor is triggered it
breaks the circuit and the camera can record and/or send a snapshot and
notifications
|
How-to Install Motion Detectors with a
Security Camera System
Installing a
motion detector and integrating it with a security camera system is fairly
simple. CCTV Camera Pros supports professional and DIY installers. Most PIR
motion sensors are 12V DC powered which gives installers the choice of using a
individual 12V DC power supply or one of the ports on a multi-channel power
supply box (the same ones used with security cameras).
In this
first diagram, a single 12V DC power transformer is used. This is how
it works.
1.
On
the right side of the diagram, the alarm input / output panel of the DVR is
shown. This is what the alarm panel on the back.
2.
18/2
gauge power cable connects the output of the motion detector to one of the
alarm input ports on the DVR.
3.
18/2
gauge power cable is also used to connect the motion detector to an individual
DC power supply.
4.
A
PT-4 power lead connects the raw cables to the 3.1mm plug on the power supply.
Installation
with Power Supply Box
A multi-channel
power supply box can be used instead of an individual power supply.
This
installation is the same as the one above using the single power supply. The
only difference is the use of a multi-channel power supply box to power the
motion detector. CCTV Camera Pros supplies many of these power boxes for
security camera installations. These power boxes can be shared with cameras and
12V DC powered alarm sensors. Because power supply boxes use screw based wire
terminals, there is no need to use a PT-4 power lead (as with the individual
power supply installation). Same connection for Camera & NVR.
Most of
Camera PIR motion sensor is located on the front of the camera, just below the
camera lens. This motion sensor is designed to detect movement of human sized
objects when they come into view of the camera’s lens. The camera has
a 2.8-12mm varifocal lens which when adjusted to the widest angle (the 2.8mm
setting) the camera provides a 109 degree horizontal field of view. The PIR
sensor detects motion across a 100 degree field of view. Please note that if
you adjust the lens to a more narrow field of view, this does not effect the
area where the PIR sensor will detect motion.
In my
experience, using a PIR sensor based motion detection is much more reliable
than software based video motion detection (especially for outdoor
video surveillance). Typically there are a lot of small moving objects outdoors
which makes it difficult to get the sensitivity just right. When security
cameras turn to night mode, there is typically some video noise because of the
lack of light. This noise can cause false alarms when using video motion
detection. A PIR sensor uses infrared light to measure the radiation
reflected by objects in its view. When a certain amount of
this radiation changes, the PIR sensor triggers an alarm, so they are not
susceptible to some of the challenges of outdoor video motion detection.
FAQ
Here are some
frequently asked questions about integrating PIR motion detectors with security
camera systems.
·
How
are motion detectors used with security camera systems?
The most common way to integrate a motion detector with a security camera
system is to hard wire the motion detector to the same surveillance DVR that
your security cameras are connected to. You must make sure that your DVR that
has alarm inputs.
·
Can I just use motion detected from my
security camera instead of an external motion sensor?
Yes, most DVRs support video motion detection triggered by cameras. Please note
that this is different from PIR (passive infrared) motion detection and can be
less reliable. Video motion detection tends to produce more false positives
than PIR motion detection, especially in outdoor and infrared camera
applications. This is because the video tends to be more noisy and outdoor
environments tend to always have some motion from wind and other natural
elements.
·
What type of cable is used to wire
motion detectors to DVRs?
The following types of cable can be used to wire motion detectors: CAT-5
cable (one pair), 18/2 conductor power cable.
·
Do motion detectors require power?
Yes. Most PIR motion detectors use 12V DC power. All of ours include the proper
power supply with them.
·
Can I use multiple motion detectors
with my surveillance system?
Yes, as long as your DVR has multiple alarm input ports, you can use multiple
motion detectors. Different model DVRs support different numbers of alarm
inputs so consult the specification or contact us if you need help.
Not every camera or NVR/DVR possesses
this unique features or can be operated through the above mentioned methods. Be
sure you research everything you will need to make this type of setup
successfully work for you. This includes the correct relays, power supplies,
capable camera and recording devices. Most our IP mega pixel cameras and
recorders have the capability of all previous mention features above.
If you are
not understand, you can touch with us for further support. We deal Infinova, Hanwha,
Milestone, Mirasys & Luxriot brand.
