The detonating device inside the cardboard box looked very complicated, with criss-crossing lines and multi-layer installation. This was the first time Tong Zhi had seen this structure.
To defuse an explosive device, you must figure out what type of detonating device it is.
Common types of trick explosive devices cannot defeat counter-explosive personnel who have received professional training and have some experience in EOD.
Therefore, in order to achieve their goals and prevent the device from being dismantled by anti-explosion personnel, criminals will try every means to make the detonation technology more complex and changeable, making the device difficult or even impossible to discharge.
Detonation technology includes several major categories: instantaneous detonation, delayed detonation, remote control detonation, and reaction energy detonation, and these major categories are also divided into multiple subcategories.
For example, the most common instantaneous explosion is landmines, which include pressed, pulled, and loose, which are relatively simple.
Delayed detonation is divided into physical delay, chemical delay and electronic delay.
Remote control detonation includes two types: wireless remote control and wired remote control.
Among all categories, the last category is the most popular among criminals and KB elements - reactionary detonation.
After years of development, reaction energy detonation technology has become very diversified. Some avoid tilting, some avoid shearing, some avoid decompression, and some have multiple designs of composite devices, which are difficult to guard against.
Tong Zhi suddenly thought that Zhuang Yan was demonstrating to himself.
He designed the cover of the explosive device to be very simple, without any trick links, so that he could easily open the cover. This meant telling himself that even if you could see the inside, you wouldn't be able to dismantle it!
indeed.
The structure set up by Zhuang Yan was very complex. He really admired this senior colonel for his real ability.
In fact, he didn't know that one of the important courses Zhuang Yan had studied at a foreign special forces academy was underwater blasting and demolition.
For solemnity, play blasting? He's definitely an expert.
However, this also aroused Tong Zhi's competitive spirit.
I am not a loser either. When it comes to bomb disposal, I have also defused a real bomb.
He carefully used insulated pliers to separate the vertical and horizontal wires one by one so that they would not block his line of sight and allow him to see the circuit board below more clearly - he could almost conclude that the explosive device was an electronic detonation device. for the main structure.
As for whether there are other composite detonation methods, we can only know after careful inspection.
A lot of sweat broke out on Tong Zhi's forehead.
It's not that I'm afraid of missing. Even if this detonating device explodes, it won't kill anyone. It can't even hurt anyone. At most, it's as powerful as a small firecracker.
But the pressure is that he doesn't know how long his explosive device can block Zhuang Yan, so he sets a bomb for him that combines three complex devices.
That thing includes a balancing device, a counter-cutting device and a mechanical detonation device.
The reason why remote control detonation is not used is because although remote control detonation sounds the most high-end, it is actually the lowest-end detonation method nowadays.
Because it is too easy to deal with it, just put the high-power jammer to the side, cut off all signals, and the wireless remote control will immediately blind you.
Beads of sweat began to fall to the ground. Tong Zhi knew that he had encountered a difficult situation, but it was difficult to get off the tiger, so he had to go up.
Even if you lose in time, you can't lose.
Soon, the line was opened, revealing the second layer of structure inside.
"really……"
He couldn't help but smile.
Just as I thought, the multi-layered structure must be a composite explosive device.
He saw a balancing device hidden under the wiring.
This is a classic anti-tilt detonation device with two power circuits, A and B.
Circuit A is in the light, circuit B is in the dark, hidden in a location where no one can find it.
Make a nearly straight V-shaped groove in the A line, bury a copper wire, and finally cut the copper wire at the V-groove position, and place a small steel ball in contact with both ends of the copper wire to maintain electricity.
When the steel column is always located in the V groove, the current is flowing smoothly and the detonating device is in stable loading. However, when the small steel ball is vibrated and deviates from the V groove, the B circuit will be automatically activated the moment the A circuit is powered off, and the B circuit is powered on the moment Will detonate immediately.
"Gene Era"
This kind of device will make life worse than death for the demolition expert when defusing bombs. This means that you must find the B circuit and cut off the detonation power supply. However, the B circuit is generally not in the open. You have to find it and even scratch the circuit board. You can find it only by using the class, but when you look for the B circuit, as long as there is a little vibration, the steel ball will deflect, and what is left is BOOM!
There is also an anti-tilt device that uses a very common glass tube-obviously, this thing can be found everywhere, such as fuses and the like. Cut one end and remove the tungsten wire inside, and put it into a piece of metal that can be found in a hardware store. The small steel balls that can be purchased are sealed at both ends to create a trigger circuit. As long as the small steel balls lose their balance and roll to either side, they will detonate when they touch one pole.
Of course, he didn't believe that Zhuang Yan would only install this anti-explosive device.
"There should be more..."
He carefully looked at the side of the cardboard box, and after making sure that there were no anti-disassembly materials such as copper wire on the side panels, he cut the side panels open.
Now, the entire body of the detonating device has been completely exposed.
He looked over from the side.
Sure enough, there is a third layer.
There was a small gap in the middle of the third floor. Since it was impossible to see the wiring and conditions inside from the side, Tong Zhi had to use something similar to a medical speculum to stick a small mirror in to see.
Finally, it took him a full two minutes to take a closer look at the third floor.
That's an anti-shear circuit.
Anti-shear kinetic energy detonation technology is usually used in electronic timed explosive devices, which is the type commonly seen in movies. When removing such electronic timed detonation devices, the method of cutting off the power supply is often used to prevent the detonation. Therefore, Whether criminals or bomb madmen, they set up a wire connected to the firing pin on the line, or set up a circuit that can generate an electrical pulse or be connected to a relay. When the wire is cut, the firing pin is released, causing an explosion. ; Either the connected circuit directly detonates, or the generated electrical pulse triggers the explosion or triggers the explosion through a relay.
Now, it seems that the methods of hitting are all figured out.
"You are just giving me a problem..."
Tong Zhi took a deep breath.
"You think I really can't dismantle it?!"
With his competitive spirit rising, Tong Zhi moved his hands and feet. Now he must first break the first layer of the stabilizing device. What is the best way to break it?
There are two ways - either find the B circuit and destroy it, or stabilize the A circuit and make the small steel balls on the V groove ineffective.
To make the small steel balls fail, the copper wires at both ends must be connected to keep them energized.
He removed a small copper wire and two small sharp-nosed clips from the bomb disposal bag, wound them respectively, and then inserted the clips into the copper wires at both ends to clamp them.
In this way, even if the small steel ball is removed, it can still be powered on. Reinforcing it later can eliminate this hidden danger.
This process seems simple, but in fact it is also a very test of psychological quality.
With just a shake of the hand, the bomb disposal will fail.
In reality, if you encounter a real bomb, missing it is basically equal to glory.
Soon, the clip was attached.
Tong Zhi breathed a sigh of relief.
Now, he wants to take away the small steel ball. As long as the device does not explode after taking it away, it means that he has passed the first level!
He stretched out his needle-nose pliers and gently pinched the small steel ball. His professionally trained hands were very steady.
Zhuang Yan's use of this device is actually to test his own psychological quality.
This is a test mode for him.
"Obey...obey..."
Tong Zhi muttered, as if coaxing a naughty child to quiet down.
The pliers clamped the small steel ball...
Now, as long as he lifts it gently, everything will come to fruition.
