On March 21, 2022, a Chinese passenger plane crashed in a forest near Guangxi Province, causing a wildfire.
The Chinese government urgently dispatched rescue personnel to participate in the rescue. While searching for the victims, they urgently searched for the "black box". So what is a black box?
The outer shell of the black box is made of very thick steel plates and multiple layers of thermal insulation and impact protection materials and is usually installed in the safest part of the tail of the aircraft to prevent it from being damaged in an air crash. The black box can be used to record various parameters of the aircraft during flight, such as flight time, speed, altitude, aircraft inclination, engine speed, temperature, etc., as well as the dialogue between the driver, the flight attendant, and various towers. When an aircraft breaks down or has an accident, finding the black box and reading out various data recorded from it can help technicians analyze the cause of the aircraft's failure or crash.
One of the ways to find a black box is through metal detectors
Metal detectors are widely used detectors. There are three main categories: electromagnetic induction type, X-ray detection type, microwave detection type, which are electronic instruments used for metal detection and can be used in many fields. Metal detectors are mainly used to detect and identify buried metal objects. In addition to its military application, it is also widely used in security inspection, archaeology, prospecting, and finding scrap metal. Also known as the "iron detector", it is a good helper for scrap recycling.
