Hi,

If a metal detector is required to detecting concealed weapons such as guns or knives. at the entrance of an office for safety, If any such suspect is found then notification should go to the central office on the mobile phone of the concerned officer . how should such a system be designed?

Basic parts needs

1) Sensor to detect weapons or guns
2) Microcontroller / Development Board
3) Buzzer

What should I use ESP32, Raspberry Pi or any other micro for this commercial product?

 

Start with the sensor. See what is available that will fit into the available space and that will have enough sensitivity to detect what is required. The rest of the system will need to be compatible with which one you choose.

 

Hi,

If a metal detector is required to detecting concealed weapons such as guns or knives. at the entrance of an office for safety, If any such suspect is found then notification should go to the central office on the mobile phone of the concerned officer . how should such a system be designed?

Basic parts needs

1) Sensor to detect weapons or guns
2) Microcontroller / Development Board
3) Buzzer

What should I use ESP32, Raspberry Pi or any other micro for this commercial product?

Chances are a metal detector alone isnt enough to tell if they have a gun or a knife, it detects metal not guns or knives, they just happen to be made of metal. If you think of the amount of metal you carry on you everyday, from jewelery to wallets to laptops, phones or other electronics, just detecting metal isnt enough. Thats why at airports you have to put everything through the xray machine and then pass through the metal detector where if you have metal on you they will get you to remove it and try again or pat you down to check if there is anything there. Machines that can detect everything you have on you like the full body scanners they sometimes use are very complex and expensive and arent just metal detectors they have xray machines and such built in as well. There is a reason that metal detectors always have someone there to check if you have anything dangerous on you because just because you have metal on you doesnt mean it is dangerous. The only real solution to the problem is to take an airport security system and put it in the entrance to the office or just have the metal detector which almost everyone will set off and have them all patted down and bags searched on the way in.

Basically if you just have a metal detector at the entrance with no other systems or people about then almost everyone who comes through the door will set it off and send a text to the officer everytime someone comes in the building. Also if it is just a metal detector with a buzzer there is nothing to stop someone running into the building and either hiding or using whatever weapons they have on them. It isnt a good way to design a security system and since it is an office you are talking about then chances are people will have bags with laptops and such in them. The system would only work if no one was allowed to bring metal into the office which is completely unrealistic and not a good idea in general.