The difference between an explosion-proof dome camera and an explosion-proof pan / tilt head is to introduce the concept of a dome camera and a pan / tilt head. The dome camera is called a dome camera, which is the representative of the current TV monitoring development. It integrates an integrated camera, pan / tilt, and decoder. Device, protective cover and other functions and integration, easy to install, simple to use but powerful, widely used in open area monitoring, can be used in different occasions. An integrated front-end imaging device with a built-in integrated camera (including zoom lens), a pan-tilt structure, and a decoder, and a spherical shield is called an integrated dome camera. It has the characteristics of small size, beautiful appearance, powerful functions, convenient installation, simple use, and easy maintenance. It is also popularly called "fast ball" or "ball machine".
The gimbal is a supporting device for mounting and fixing the camera. It is divided into two types: fixed and electric. The fixed head is suitable for situations where the monitoring range is not large. After the camera is installed on the fixed head, various angles of the camera can be adjusted, and the adjustment mechanism can be locked after reaching the best working posture. The motorized head is suitable for scanning and monitoring a large area, and it can expand the surveillance range of the camera. The high-speed attitude of the electric head is realized by two executive motors, which receive signals from the controller to accurately run and position. Under the control signal, the camera on the pan / tilt can either scan the surveillance area automatically, or track the surveillance object under the control of the staff on duty at the surveillance center.
From the above introduction, do you have some understanding of the difference between dome cameras and gimbals, then let's explain the difference between their composition.
The main components of the dome camera include integrated cameras, high-speed stepper motor heads, embedded decoder boards and other electronic components and dome camera covers (4 inch (mini ball), 5.7 inch, 6 inch, 7 inch, 9 inch) Mounting brackets.
Inside, the camera mounted on the electric head can be rotated up, down, left and right under the control of the control end to achieve the monitoring effect.
There are three types of ball machines common on the market: fixed type, rotatable type, and PTZ function type. According to its type, its functions are also different, and at the same time, users have more room for choice, and can choose products that meet their needs according to different application environments.
There are two motors inside the PTZ, which are responsible for the rotation of the PTZ up and down and left and right. The difference in operating voltage also determines the overall operating voltage of the gimbal, which generally has AC 24V, AC 220V, and DC 12V. When receiving the up and down action voltage, the vertical motor rotates, and the vertical transmission wheel is rotated by the reduction box; when receiving the left and right action voltage, the horizontal motor is rotated and the horizontal gear disk at the bottom of the gimbal is rotated by the reduction box .
It should be noted that the gimbal has horizontal and vertical limit bolts. The gimbal has two micro switches to achieve the limit function. When the rotation angle reaches the preset limit stop, the micro switch acts to cut off the power, and the gimbal stops rotating. The limit device can be located outside the PTZ, the adjustment process is simple, or it can be located inside the PTZ. The adjustment is performed by the adjustment mechanism of the peripheral device, and the adjustment process is relatively complicated. However, the gimbal with external limiting device is not as tight as the gimbal with built-in limiting device.
The outdoor PTZ is roughly the same as the indoor PTZ, except that the weight of the outdoor shield must increase the load capacity of the PTZ. At the same time, the hot and cold changes of the outdoor environment are large, and they are easily eroded by rain or moisture. Therefore, outdoor gimbals are generally designed to be sealed and rainproof. In addition, the outdoor PTZ also has a high torque and choke protection circuit to prevent the motor from being forcibly started when the PTZ is frozen. Under the severe conditions of low temperature, a temperature-controlled heater can be installed inside the gimbal.