Entertaining radiography
Yesterday I visited MAI at department 307, which I told about in the summer. Among the many modern equipment, there is the Nordson DAGE XD7600NT Ruby X-ray inspection system. In fact, it is a 3D X-ray with the function of a software tomograph, which has an ultra-high resolution and allows to recognize objects with a size of 250 nm. I had with myself filament bulbs and we looked at what was inside them.
The head of the department 307 Fyodor Vladimirovich Vasilyev showed me how the installation works.
We put a light bulb on a subject table and began research.
')
Filaments. Connections between the LEDs are visible inside.
You can calculate that in each filament 28 LEDs. The X-ray LEDs themselves are transparent.
Driver. Oh, and what is it there at the top of the junction of the board and base? ;)
Increase and wonder. Apparently, the lamp after the assembly did not work, and the Chinese somehow disassembled it and repaired it, and then just twisted the wire going to the base.
On the other exactly the same lamp there is no twist.
We look further. A wire resistor is visible through which the driver connects to the network and the coil.
View of the board from the side of the bulb.
Well seen poor quality soldering. Inside the solder drops there are voids (light spots).
The installation allows to detect defects in soldering, metallization of holes, and even defects in connections inside the microcircuits.
Filament "candle".
Almost the entire space of its small base is occupied by a capacitor smoothing pulsations. It is pale, since aluminum is almost transparent to X-rays.
The filaments are exactly the same as those of the big bulb.
We did not immediately guess how the resistor leg connects to the contact of the base. Very simple and very cunning! First, the driver board is inserted, and then the socket contact is inserted into the back of the connector in the form of a plug and clamps the leg.
During the study, I published a short video on my instagram . It clearly shows how in real time you can look at the insides of the object from different sides.
This is the "journey into the inner world" of the light bulbs I made yesterday. It was very interesting to me. I am sure that we, together with the department of 307 MAI, will do much more interesting and useful things.
© 2017, Alexey Nadyozhin
The head of the department 307 Fyodor Vladimirovich Vasilyev showed me how the installation works.
We put a light bulb on a subject table and began research.
')
Filaments. Connections between the LEDs are visible inside.
You can calculate that in each filament 28 LEDs. The X-ray LEDs themselves are transparent.
Driver. Oh, and what is it there at the top of the junction of the board and base? ;)
Increase and wonder. Apparently, the lamp after the assembly did not work, and the Chinese somehow disassembled it and repaired it, and then just twisted the wire going to the base.
On the other exactly the same lamp there is no twist.
We look further. A wire resistor is visible through which the driver connects to the network and the coil.
View of the board from the side of the bulb.
Well seen poor quality soldering. Inside the solder drops there are voids (light spots).
The installation allows to detect defects in soldering, metallization of holes, and even defects in connections inside the microcircuits.
Filament "candle".
Almost the entire space of its small base is occupied by a capacitor smoothing pulsations. It is pale, since aluminum is almost transparent to X-rays.
The filaments are exactly the same as those of the big bulb.
We did not immediately guess how the resistor leg connects to the contact of the base. Very simple and very cunning! First, the driver board is inserted, and then the socket contact is inserted into the back of the connector in the form of a plug and clamps the leg.
During the study, I published a short video on my instagram . It clearly shows how in real time you can look at the insides of the object from different sides.
This is the "journey into the inner world" of the light bulbs I made yesterday. It was very interesting to me. I am sure that we, together with the department of 307 MAI, will do much more interesting and useful things.
© 2017, Alexey Nadyozhin
Source: https://habr.com/ru/post/401679/
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