Posts Tagged ‘ outdoor security camera ’

Wireless Outdoor Security Camera Systems

Tuesday, January 4th, 2011

A wireless outdoor security camera system can be used for many different applications. The system is easy to install, easy to operate, and incredibly versatile in application. Since the wireless outdoor security camera does not require a video transmission cable to be run from each camera to the Digital Video Recorder or DVR, you may want to consider this system if cabling the system is impractical, undesirable, or simply can’t be done.

Standard standalone digital video security systems have three major components: 1) One to several digital video cameras; 2) A Digital Video Recorder or DVR; and, 3) one or more color monitors. The digital video cameras capture light images and turn them into electronic data that is sent to the DVR. The DVR creates a digital video file that can be viewed that instant (live) on the monitor and/or stored on the DVR for later viewing, archiving, etc.

These systems are connected by the use of various wires and cables. For instance, each digital video camera must have a coaxial cable run from the camera to the DVR unit. This video transmission cable is usually RG-59 type coaxial video transmission cable. It carries the video data from the camera to the DVR unit to be processed. Each camera also must have a smaller low-voltage DC wire run to it from either a power distribution supply box or a nearby plug-in transformer.

Wireless outdoor security camera systems eliminate the need to install the digital video transmission cable. Instead of using RG-59 coaxial cable the camera sends its video data to the DVR by radio wave signals. This is normally done in one of two ways. Either the camera sends its radio signal to a corresponding receiver which is located near the DVR unit and connected to it by cables, or the DVR unit itself has on-board receivers that the camera broadcasts its signal to.

The camera of a wireless outdoor security system may not be entirely wireless. Although there is no need to run the RG-59 coaxial cable in these systems, the cameras still require a power supply which is normally provided by the power distribution center box or a nearby plug-in transformer. However, there are cameras that are battery operated, using either one-time-use or rechargeable batteries. These cameras are truly wireless in that they have no video transmission cable or power supply wires run to them.

Since outdoor security camera systems do not require video transmission cabling, they can be much quicker and easier to install. Mount the camera, plug it in, and it’s ready. Even easier to install are the battery operated cameras; just mount the camera (no need to run a power supply wire) and it’s ready to go.

Wireless outdoor security camera system cameras use various technologies to send their radio signals to the designated receiver or DVR. One of the most popular methods that is used is the 2.4 or 5.8 MHz technology; this is the same technology used to send land-line based cordless telephone signals. It’s useful for this purpose because the signal is strong and virtually interference free.

It is important to note that the camera-receiver (or DCR with built-in receiver) relationship on wireless outdoor security camera systems have different specified ranges. Not all cameras have the same range. In fact wireless cameras may have a manufacturer’s specified range of from 30 feet to 2 miles Line Of Sight or LOS. LOS means a direct path in a straight line from camera to receiver that has no objects blocking the path. In other words, if you are standing at the point where the camera is mounted, you should be able to see the receiver (i.e. LOS).

Although the range is specified as LOS, it doesn’t necessarily mean that an impeding object along the path will prevent reception. In fact, seldom is the reception actually blocked by impeding objects; normally the range is just reduced. The reduction of the range is variable based on the transmission signal technology used and the material make up of the object(s) that fall within the LOS. Windows have less effect that walls or trees for example. This is not unusual as cordless telephones share this same sort of LOS range. Therefore, be certain the specified range of the camera satisfies your requirements before purchasing the camera or system.

Other than the need for replacing or recharging batteries, the cameras in a wireless outdoor security camera system or relatively maintenance free.


Night Time Outdoor Security Camera Kits

Thursday, December 23rd, 2010

If you have property that you need to protect or monitor during low or no light conditions consider purchasing night time outdoor security camera kits. These kits can provide you with all the equipment you need to effectively monitor and protect your property, without the need for expensive outdoor lighting. Thanks to modern technological improvements, these kits are reasonably priced as well.

So what do night time outdoor security kits contain? Kits may vary based on manufacturers or vendors, but most kits contain at least two major components of a digital video security camera system: 1) Very low light or no light outdoor security cameras; and, 2) A Digital Video Recorder (DVR) with a Digital Signal Processor (DSP). Since monitor applications differ, and many systems may be able to use an existing computer monitor for your security camera system, monitors are usually sold separately from the kit.

Security Camera King offers a variety of digital video security camera kits including night time outdoor security camera kits. However, in addition to the digital video cameras and a DVR, Security Camera King’s security kits come complete with either plug and play camera cables or bulk cable, and either a multiple channel space saving power supply or a multiple channel power distribution box.

A night time outdoor security camera kit is a highly specialized type of digital video security camera system. These systems contain cameras that are designed for outdoor use and can record video in very low-light or no-light conditions. Let’s take a look at these cameras.

First, there are two basic types of digital video security cameras, indoor and outdoor. Indoor models are designed to operate under the protection of a building or cover of some type. They are not designed to operate when exposed to weather or the elements, such as rain, snow, hail, ice, etc.

Outdoor cameras are designed to operate in outdoor settings, exposed to and offering protection to the camera from, weather and the elements. The cameras are normally enclosed by a protective covering. Outdoor cameras are often rated with an International Electrotechnical Commission (EIC) code or rating that indicates the degree of protection that is provided to the camera. The rating is called an IP code or IP rating.

An IP code consists of the letters “IP” followed by two digits. The first digit indicates the size of the object that the camera is protected from ranging from 0 (meaning no protection) to 6 (meaning dust tight). Numbers from 1 – 5 indicate different sizes ranging from >50 mm to particles the size of dust. The second digit indicates the degree of protection against liquids ranging from 0 (meaning no protection) to 8 (meaning protection from immersion beyond 1 m in depth). For example, a very good IP rating is IP66 which means the camera housing is dust tight and offers protection against powerful water jets from any direction.

Night time outdoor security camera kits normally include digital video cameras that are specifically made for low-light (also called low “lux”) or no-light (infrared) use. “Lux” is a measurement term used to measure the intensity of light. For example, the light available in full daylight, but not directly in the sun ranges from 10,000 to 25,000 lux. In contrast, the visible available light of a moonless clear night sky is approximately 0.002 lux. Low-light or low-lux cameras can record video in lighting conditions as low as 0.002 lux, depending on the quality of the camera.

No-light cameras are usually called night vision infrared cameras. These cameras are designed to record high-quality video using near infrared illumination. The cameras sensor chip can detect near infrared spectrum radiation just like visible light; however, this illumination is invisible to the human eye.

Infrared cameras usually have an array of infrared Light Emitting Diodes or LEDs that surround the camera lens or are placed next to it so that their infrared illumination is focused on the same field of view as the camera. There are also LED “Illuminators,” separate arrays of just LEDs that can provide illumination for the camera also. Generally, the more LEDs the longer the range of the camera, so when purchasing these cameras be sure they have the night time range that you require.

Night time outdoor security camera kits have come a long way with the technological advances in computer and electronic components. Security Camera King offers several different night time outdoor security camera kits. Check out our products under “Security Camera Systems.”


Outdoor Wireless Security Camera Package

Friday, June 4th, 2010

An outdoor wireless security package is an excellent choice for use in both business and residential applications. Standard outdoor wireless security packages are available that contain all the necessary components to provide digital video security and surveillance monitoring or you can create your own package with components that are suited to your own needs.

A basic outdoor wireless security package contains the following components:

  • • One to several outdoor wireless digital video cameras
  • • A receiver unit or units
  • • A processor or capture board with CODECs
  • • A monitor and,
  • • A Digital Video Recorder or DVR

Outdoor wireless cameras differ from indoor wireless cameras primarily in the way the camera is encased. Most outdoor security cameras are enclosed in a housing that prevents entry of dust particles and water and protection from weather elements like wind, hail, and snow. These cameras may have an International Electrical Code standard Ingress Protection rating or IP rating. Most outdoor wireless cameras are rated as IP66 or IP67 which means they offer complete protection from dust and water (IP66) or dust and being submerged in up to 1 meter of water (IP67).

There are several options available for an outdoor wireless security package in regard to the camera types. Standard outdoor wireless cameras provide high quality color video in normal lighting conditions. Day/night vision cameras contain a sensitive light sensor chip called a Charge Coupled Device or CCD that can produce a video image in very low light conditions, such as a moonlit night.

These cameras are often rated in terms of light intensity sensitivity called Lux. Typical outdoor non-direct sunlight intensity ranges from 10,000 to 30,000 Lux. By contrast, a typical moonless clear night sky has an available light intensity rating of about 0.002 Lux. Some outdoor wireless day/night vision cameras are capable of producing images with only 0.002 Lux of visible light.

Another camera choice for an outdoor wireless security package is a night vision infrared (IR) camera. These cameras can produce clear, high quality monochromatic or black and white video images in total darkness.

CCDs are inherently sensitive to IR light or radiation. IR cameras have several IR Light Emitting Diodes or LEDs that surround the camera lens. These LEDs emit infrared light which is invisible to the human eye. However, to the specialized CCDs in these cameras, the LEDs produce IR light that acts light a flood light or spot light on the target area of the camera.
An outdoor wireless security package can also be purchased with cameras that contain pan, tilt, and/or zoom (PTZ) features. These functions can be controlled manually by remote control or automatically. Programmed automatic PTZ cameras can detect motion and track objects such as cars in parking lots or individuals.

Lastly, an outdoor wireless security package can include cameras that can also record audio.

The wireless cameras in these packages may contain rechargeable batteries but most often contain a power source that supplies power to the camera via a small wire. Although most “wireless” security cameras still require the power wire, the coaxial transmission wire that would normally be run from each camera to the processor is not required. These cameras transmit the video image via on-board antennae instead of by cables.

Most outdoor wireless security package cameras transmit the images utilizing the 2.8 or 5.8 MHz radio band technology. The image is transmitted to a corresponding receiver. Most receivers can receive separate video simultaneously from up to four different cameras. Packages that require more than 4 cameras often include additional receivers with different channels.

The receivers relay the video image data to a processor or capture board that interprets the data and creates a digital video file that can be viewed immediately or stored for later use. Digital video files contain enormous amounts of data anc can be incredibly large for only a few minutes of recording time, so a COmpression/DECompression (CODEC) application is normally used. The CODEC reduces the size of the digital file drastically while maintaining the quality of the image. This allows for increased storage on the DVR and easier handling by the processor.

The DVR is very similar to a hard drive on a personal computer. The digital video files are stored on the DVR until it is full and are then rerecorded.

Thanks to modern technological advancements, an outdoor wireless security package can be custom designed to fit your situation and still be affordably priced.