The gimbal is the supporting equipment for installing and fixing the camera. It is divided into fixed and electric gimbals.
The fixed gimbal is suitable for the situation where the monitoring range is not large. After the camera is installed on the fixed gimbal, the level and pitch angle of the camera can be adjusted. Once the best working posture is achieved, only the adjustment mechanism can be locked.
The electric pan / tilt 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 pan / tilt is realized by two execution motors, and the motors receive signals from the controller to accurately perform positioning. Under the action of the control signal, the camera on the gimbal can automatically scan the monitoring area, or it can track the monitoring object under the control of the personnel on duty in the monitoring center.
According to the characteristics of its rotation, the gimbal can be divided into a horizontal rotating gimbal that can only rotate left and right and an all-round gimbal that can rotate both left and right and up and down. Generally, the horizontal rotation angle is 0 ° to 350 °, and the vertical rotation angle is + 90 °. The horizontal rotation speed of the constant speed gimbal is generally 3 ° ～ 10 ° / s, and the vertical speed is about 4 ° / s. The horizontal rotation speed of the variable speed gimbal is generally 0 ° ～ 32 ° / s, and the vertical rotation speed is about 0 ° ～ 16 ° / s. In some high-speed camera systems, the horizontal rotation speed of the gimbal is as high as 480 ° / s and the vertical rotation speed is more than 120 ° / s.
A pipette, also known as a pipette gun, is a device used to quantitatively transfer liquids. When conducting research in analytical testing, a small or trace amount of liquid is generally removed with a pipette. Pipettes can be divided into gas piston pipettes (Air-displacement pipette) and external piston pipettes (Positive-displacement pipette) according to the principle. Gas piston pipettes are mainly used for standard pipetting, and external piston pipettes are mainly used to handle special liquids such as volatile, corrosive and viscous. Many people ignore the correct use of pipettes and some of the details.
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