Today, more and more often you can find indoor surveillance cameras. Together with outdoor video surveillance cameras, they make up a full-fledged security complex that allows you to remotely monitor what is happening. The technique can be used both privately and publicly to ensure the protection of government agencies and businesses.
Working principle
The functioning of the video surveillance system is based on reading the image in front of the matrix and its subsequent transmission to the DVR via a cable or wireless connection. The information received from the camera is processed by the video recorder with subsequent output to the monitor and recording to removable media or internal memory.
When choosing a video surveillance system, they rely on several components, such as a DVR, camera, cables and monitor. Component specifications vary. The camera is selected based on the specific installation location - outdoors or indoors. Depending on the latter, two types of cameras are distinguished: internal and external.
Scope of application
The main tasks of internal cameras, in addition to control,surveillance, protection and warning as follows:
- Online surveillance. Cameras of this type are often found in government and public institutions, banking organizations, shops and other facilities that require constant visual monitoring of visitors.
- Continuous shooting with the ability to view recorded files, store and archive them.
- Monitoring and control of processes occurring in rooms with limited access.
- Covered footage of specific facts such as workflow violations, unwanted behavior or dereliction of duty.
Classification
Indoor video surveillance cameras are divided into several types according to the method of data transmission, the shape of the body and the presence of additional sensors:
- Dome cameras. Protected by a special dome, installed under the ceiling.
- PTZ cameras. Models equipped with motion sensors.
- Hidden cameras. Compact dimensions allow you to hide them from prying eyes.
- Wireless cameras. No cabling needed, making installation easy but limited range.
By form factor
Indoor dome cameras are best for indoor recording. Models are made in the form of a hemisphere, some are protected by a special "glass".
The set of original case models does not include brackets and fasteners. Such cameras are purchased to perform specifictasks. High-strength protection of the case allows you to place them on the street without much harm. Despite all the advantages, box cameras are rarely used for indoor surveillance due to their large dimensions.
Hidden video recording is carried out by means of miniature video cameras. Their square or oblong body is inconspicuous and is attached using the supplied brackets. Installed indoors only. The compact dimensions of internal cameras make them popular and allow you to hide the fact of their presence from prying eyes.
By type of data transfer
Classified into two categories - wired and wireless.
The performance of the first type of internal cameras depends on the availability of the necessary wiring. Most models are powered by twisted pair, although relatively recently coaxial cable has been used. Optical fiber is becoming more and more popular due to the high reliability of data transmission and modernity.
Difficulties associated with pulling the cable are considered a disadvantage of wired indoor cameras. During their installation, wall chasing is often required. The second drawback is the difficulty of masking the laid wiring. However, wired transmission has its advantages - the availability and range of signal transmission.
Wireless data transfer protocols use modern IP, Wi-Fi and Bluetooth cameras. Unlike wired ones, they do not require cables, but they require power to operate. The signal range is significantly reduced due to bindingcameras to the repeater and router. The broadcast is terminated on any failure.
Unlike wired counterparts, wireless models require constant user intervention.
Functional
To save on cabling, the function of recording to a memory card allows you to bypass data transfer to a hard drive located in the receiving unit. The memory card slots are located on the body of the internal cameras. Models with the ability to write files directly to micro SD are the best option for specific purposes.
Motion sensor is an important component of home indoor surveillance cameras. It is resorted to in rooms that remain empty for a long time. The number of triggers depends on the number of movements in the frame. Convenient when creating security systems for rarely used objects.
The capabilities of some cameras allow you to view broadcasts online via P2P or IP technologies. In this way, the functionality of motion sensors can be checked.
For cameras with color reproduction, HD support is relevant. In places where quick recognition of a person is required or small details play a role, the technology is in demand. The quality of the transmitted image depends on the resolution of the lens. Due to the high popularity of the HD format, many camcorder manufacturers are introducing QHD and UHD support into their products. The quality of the recorded material depends on the availability of these options.
Rating of the best cameras
Video cameras for internal surveillance are in demand and are available in a wide range. Functional and reliable models are not necessarily expensive. To select a specific video camera, you must be guided by your goals. Below are some of the best indoor cameras for home and office use.
Zodiak 770 Thermo
Zodiak is known to many consumers for the high quality and reliability of its products. Model 770 Thermo PTZ Inner Camera supports FHD; The body rotates 120 degrees vertically and 355 degrees horizontally. There is a built-in humidity and temperature sensor, which increases efficiency. Sound recording range - 5 meters. Supports memory cards up to 128 GB, which is equivalent to 10 days of continuous recording. If necessary, a power cable can be laid.
Benefits:
- Two types of data transmission.
- Wide functionality.
- Built-in microphone.
- Turn case.
- Original design.
- Support high quality and resolution recording.
- Additional sensors.
Flaws:
- Problems with sound recognition.
- Insufficient equipment.
- No support for high-end memory cards.
Hikvision HiWatch DS-T103
Budget model of the internal camera with backlight and wide functionality sufficient for conductingvideo surveillance. The equipment is equipped with a motion sensor and infrared illumination. Compact dimensions and light weight allow you to hide the cameras from prying eyes. Visibility of the image is increased to 20 meters thanks to IR illumination. The level of protection of the housing against moisture - IP66. The maximum image resolution is 1296 x 732 pixels.
Benefits:
- High quality and reliability.
- IR light.
- Affordable price.
- Motion sensor.
- Compact and light weight.
- Quality matrix.
- M12 tripod mount.
Flaws:
- No HD.
- Bare equipment.
- No turning mechanism.
ORIENT AHD-956-ON10B
Indoor dome IP camera with two modes of operation - CVBS 960H and AHD720p. Standard video surveillance and good image quality are achieved through a resolution of 1 MP. Maximum visibility - 10 meters, filtering noise and interference in automatic mode.
The advantage of the model is the high strength of the case and soft-touch coating, which makes it resistant to damage. Unfortunately, there is no anti-vandal protection.
Benefits:
- High strength body.
- Auto noise reduction.
- Affordable price.
- Easy to install.
- IR light.
- Two operating modes.
- Long service life.
Flaws:
- No HD.
- Clearness suffersimages.
Required number of cameras
The number of cameras installed varies depending on the objectives pursued. The choice of the place of installation and the amount of equipment is based at least on common sense. When equipping a private house with cameras, you should not place them in every room: as a rule, it is enough to install them in front of the entrance doors and windows.
To spy on the nanny, cameras are placed in the premises where there are children and hired personnel - this will avoid unnecessary expenses.
In the case of providing a business with a video surveillance system, the number of cameras is determined by the dimensions of the premises and the goals pursued. Production control requires a large number of cameras with high quality and clarity, and for an office, one or two cameras in common areas and at the entrance will suffice.
