Q:What is the meaning of the camera function heartbeat?

For example, after the information system has done single sign-on integration, it can keep the system's local login function in order to reduce the risk of system coupling. And then use the system "heartbeat" function to achieve the two users of the automatic switch, thus increasing the robustness of the system, to prevent the failure of the unified certification system caused by global paralysis. So what is the "heartbeat" function? The "heartbeat" function is a method of using periodic access to determine whether other system functions are normal.

Q:What is the black box that monitors the camera connection?

Optical (transmitter) is the camera output of the electrical signal is converted to optical signals, through the fiber to the signal transmission to the control room, and then (the receiver) will be converted to electrical signals into electrical output to the hard disk video recorder.

Q:Zhongwei HD monitoring system IP address is not how to do

Click on the problem of the screen, right - remote management - network management, the IP address can be changed to other IP (such as 192.168.1.172, etc.), change the device management interface, a key to set IP, so there will be no IP conflict Causing the camera can not use the problem.

Q:Police surveillance camera and civilian What is the difference?

Police monitoring camera and civilian is not much difference, according to the project budget to choose the right price of the product on it, there is a military equipment, need to go through the relevant military certification, as long as the relevant military certification, and ordinary equipment is very Big difference, at least the price can be put up.

Q:Home surveillance camera with which brand is good?

But recently they saw their home out of the new monitor, baby monitor, the family can consider a child ah, in fact, this can also monitor the child, but that part of the function is for the children. Can choose according to their own needs.

Q:Monitor the camera lens focal length is what the situation according to the scope of the big focal point what the situation according to the clear

Dome cameras generally have 2.5mm, 3.6mm, 6.0mm.

Q:What kind of monitoring camera is used in the store? 360 ° with the introduction of ordinary

If the store to install two, generally use diagonal installation, select 3.6MM lens, the basic can see the whole store (of course, the store is not big, about 20 square).

Q:Monitor the camera must be a separate threading it?

1, to facilitate future maintenance 2, to avoid sun and rain 3, to avoid strong interference and other

Q:The working principle of the camera with infrared light

Infrared emission diode (IR LED) infrared lamp principle is: by the infrared light-emitting diode matrix composed of light. Infrared emission diode from the infrared radiation efficiency of high materials (commonly used gallium arsenide GaAs) made PN junction, plus forward bias voltage to the PN junction injection current excitation infrared light. Spectral power distribution for the central wavelength of 830 ~ 950nm, half-peak bandwidth of about 40nm or so, it is narrowband distribution, for ordinary CCD black and white camera can feel the range. The emission power of the infrared light emitting diode is expressed by the irradiance μW / m2. The maximum radiation intensity of the infrared diode is generally in front of the optical axis and decreases with the increase of the angle between the radiation direction and the optical axis. The radiation intensity is 50% of the maximum value of the angle is called the half intensity radiation angle, that is, half power angle. The radiation angle of the infrared light emitting diodes of different packaging process models is different.

Q:Digital camera and analog camera difference

1, analog camera: it belongs to the front-end video capture device, analog camera output is the analog video signal, through the encoder can be video capture equipment to produce analog video signals into digital signals, and then stored in the computer. The video signal captured by the analog camera must be converted to digital mode via a specific video capture card and compressed before it can be converted to a computer.