More and more camera manufacturers, CCD board, chip program, we do not know what to call, procurement headache, boss headache, technicians almost jumped, more than 20 CCD chip combinations put in front of you, the gods are dizzy ah.
How many kinds of chip combinations will you talk about next time? Today, talk about how to test a qualified CCD board machine
1, the appearance, check the CCD board appearance, see whether the capacitor has bile capacitance (that is yellow capacitor has words), a normal CCD board has at least 2 or more, if not, that is in order to save the cost by K. Check the power supply IC 6 feet, is 2259 of imports, domestic prices generally cheaper, but non professionals can not skip this, IC is the six foot video amplifier, imports is 1671, the domestic general price is 9701 cheaper.
Check AA88347, AA8722290209080 the IC, genuine small IC is thin, if the domestic font size is rough, thick, coarse foot components, in order to save costs, the market now has 80% manufacturers with a domestic, price, 1/3. Check the output of the video where there are 2 diodes, lightning protection, anti-static, many manufacturers have saved. Check whether the whole welding point of the CCD board is smooth and smooth, and whether the components are arranged in order.
2, look at the current, electricity, first of all to see whether the current is too large, normal general Pu line is about 70 Ma, high wire general 80 Ma or so, such as 3172 chips. If the current is over 100 Ma, the CCD board must be careful and the heating is out of order.
3, look at the voltage from the 7-16V debugging with adjustable power supply, CCD test machine can work normally, if the image is not affected, then congratulations, you are in CCD wide voltage, in the engineering construction is very good, because the construction of voltage and line is not the same.
4, smooth to detect CCD, CCD machine now produces the hundreds of enterprises, but the real equipment technology only dozens of observation of a CCD machine manufacturers are regular, CCD foot is flat, the solder is round is an important standard. We can sampling 10 CCD machine, installed 3.6MM lens, we control the test map clearer after the zebra circle test chart, on the 4 corners of the display are as clear, if the 4 corner is a corner of fuzzy phenomenon, it shows that the CCD foot rough production the process is not standard.
5, night vision detection, a CCD machine is qualified to also look at whether good illumination, noise is small, and now we mainly assembled the infrared camera, the illumination requirements are very high, if the low illumination night image will appear black, if illumination is too high, the night will appear the noise is too large, so that is not good when the CCD board engineers now ah, is to meet the requirements of every customer, the best way is to compromise. We are basically acceptable, good night illumination noise is small. The best test in the darkroom test. The best test with infrared light infrared effect, but also in the darkroom test, clarity and brightness of the image observation. Detection of noise is uniform, there should be no moire image.