Product characteristics of industrial cameras

1. The captured image has high definition and good color reproduction, and the exposure time, white balance, contrast, brightness, saturation and chromaticity are automatically controlled by software.

2. Simple installation and operation. Through USB2.0 interface, real-time uncompressed digital images can be obtained by plug and play without additional acquisition equipment. Minmei operating software has a simple interface, and what you see is what you get.

3. It has the function of dynamic video recording, and its compressed format is very convenient to store.

Classification of industrial cameras

According to the camera devices, industrial cameras are divided into two categories: electric vacuum camera devices (camera tubes) cameras and solid-state camera devices (CCD devices, CMOS devices) cameras. The development of electric vacuum camera tube is early and there are many kinds, but the cost is high and the volume is large. Now it has been replaced by the solid-state camera device selected by the general TV monitoring system. The latter is a new camera device, which has the advantages of low inertia, high sensitivity, strong light resistance, small geometric distortion and good uniformity. Shock-proof, no micro-sound effect; Small and light, long life. Industrial cameras are developing towards miniaturization, light weight, low cost, improving image quality and increasing operating functions. The mainstream industrial cameras are basically divided into CCD sensors and CMOS sensors.

CMOS (complementary metal oxide semiconductor), the sensitivity of CMOS sensor is generally in the range of 6 ~ 15 lux, and the noise of CMOS sensor is 10 times higher than that of CCD sensor. Fixed pattern noise always stays on the screen as if it were a pattern. Because CMOS sensors are basically useless below 10Lux, a large number of cameras use CCD sensors, and CMOS sensors are generally used in very low-end home security. However, with two exceptions, CMOS sensors can be made very large and have the same sensitivity as CCD sensors. CMOS sensor is very fast, which is 10 to 100 times faster than CCD sensor, so it is very suitable for special applications such as high ens DSC camera (Cannon D-30) or high-format camera. CMOS sensor can put all the logic and controller on the same silicon chip, which makes the camera simple and portable, so CMOS camera can be made very small. Although the energy consumption of CMOS camera is equal to or slightly higher than that of CCD camera, CMOS sensor uses few chips such as CDS, TG and DSP, so the total energy consumption of the same size is reduced by 1/2 to 1/4 compared with CCD camera. Although CCD stands for "charge coupled device" and CMOS stands for "complementary metal oxide semiconductor", neither CCD nor CMOS is suitable for image sensing. The sensor with real feeling is called "like semiconductor", and CCD sensor and CMOS sensor (for the time being) actually use the same sensor "like semiconductor". For example, semiconductors are PN junction semiconductors, which can convert the photon explosion junction of light into a proportional number of electrons. The number of electrons is calculated by the voltage of the signal. The more light enters the image semiconductor, the more electrons are generated, and the higher the voltage output by the sensor. CCD is called "Charge Coupled Device". In fact, CCD is just a way to store electrons from image semiconductor in an organized way. CMOS is called "complementary metal oxide semiconductor". In fact, CMOS is just a technology of putting transistors on silicon blocks, which has no more significance. The sensor is called CMOS sensor only to distinguish it from CCD sensor, and it has nothing to do with the real method of image processing by the sensor. CMOS sensor directly converts electrons generated by image semiconductor into voltage signals, so it is very fast without complicated processing. This advantage makes CMOS sensors very useful for high frame rate cameras, which can reach 400 to 2000 frames per second.

CCD (Charge Coupled Device) is a semiconductor, which can record the light changes in digital cameras. The image of the object is focused on the CCD chip through the lens, and the CCD accumulates corresponding charges according to the intensity of light. Under the control of video sequence, the accumulated charge of each pixel is moved out point by point, and the video signal is output after filtering and amplification. When a video signal is connected to the video input of a monitor or TV, you can see the same video image as the original image. Whether it is a color camera or a black-and-white camera, optical signals are converted into electrical signals by electronic scanning of CCD itself, and photoelectric conversion devices are CCD devices. CCD is the abbreviation of charge coupled device, so it is also called coupled camera. It adopts Hyperhad (hole accumulation diode) CCD technology. When the light reflected by the object passes through the lens and is focused on the CCD chip, the CCD accumulates the corresponding charge according to the intensity of the light, and generates an electrical signal representing the frame after periodic discharge. After a series of processing such as filtering, amplification, shaping and DSP (digital signal processing), the standard composite video signal is output through the output end of the camera. This standard video signal is the same as the video output of home video recorder, VCD player and home video camera, so it can also be recorded or connected to TV to watch. The main sensitive element of the coupled camera is CCD, which has the characteristics of high sensitivity, small distortion, long life, anti-vibration, anti-magnetic field, small size and no afterimage. It can convert light into charge, store and transfer charge, and take out the stored charge to change the voltage, so it is an ideal camera element. It is a new device to replace the camera tube sensor.