Small-size movable-type solid and liquid material radioactive activity detection device and method

The invention discloses a small-size movable-type solid and liquid material radioactive activity detection device and method, and the device comprises a case, a measurement chamber fixed in the case, a display screen disposed on the surface of the case, and a measurement circuit disposed in the case. The measurement chamber and the display screen are arranged to be parallel to each other. The display screen is connected with the measurement circuit. The measurement chamber comprises a tungsten alloy cover, a tungsten alloy shielding tank body, a sample cup, and a probe. The tungsten alloy cover is divided into a left cover and a right cover, wherein one end of the left cover and one end of the right cover are in movable connection, and the other end of the left cover and the other end of the right cover are movable rotating opening end. The measurement circuit comprises a high-voltage power supply, a current amplification and forming circuit, a voltage discriminator, a counter circuit, a processor circuit, a multi-way adjustable voltage reference circuit, a key, and a display circuit. The device employs an integrated flat structure design, is small in size, is low in center of gravity, is convenient and safe for opening, is placed stably, cannot be turned at a side, employs a waterproof design for the sample cup, and can be suitable for vehicles and ships.