Abstract: An image acquisition device and a measuring method for geometric parameters of a specific developing area on a concrete test block. In the image acquisition device, a digital camera is provided on a camera support; the camera support is provided with a screw bearing which is connected to a first stepping motor via a first coupling; the camera support is provided on a screw slideway which is connected to a second stepping motor via a second coupling; the screw slideway, the first stepping motor and the second stepping motor are provided on a rear platform of a L-shaped base; a spirit level and a controller are respectively provided at two sides of the rear platform of the L-shaped base; and a reference glass plate is arranged on a front raised platform of the L-shaped base.

Abstract: An image acquisition device and a measuring method for geometric parameters of a specific developing area on a concrete test block. In the image acquisition device, a digital camera is provided on a camera support; the camera support is provided with a screw bearing which is connected to a first stepping motor via a first coupling; the camera support is provided on a screw slideway which is connected to a second stepping motor via a second coupling; the screw slideway, the first stepping motor and the second stepping motor are provided on a rear platform of a L-shaped base; a spirit level and a controller are respectively provided at two sides of the rear platform of the L-shaped base; and a reference glass plate is arranged on a front raised platform of the L-shaped base.

Abstract: A cutter and a cutting method for concrete test blocks, where an upright column is fixed at left-rear end of a base, a support for an electric motor provided at rear end thereof is provided on an upper part of the column, a driving gear is provided at left side of the electric motor, a driven gear is connected with the driving gear via a belt, a control switch is provided at a front end of the support, a grip is provided at right side of the control switch, a transmission shaft is connected to right side of the driven gear, double sawblades are provided at right end of the transmission shaft, a shield is provided above the double sawblades, a water pipe is connected to an upper part of the shield, the clamp is provided at right-front end of the base and the handle is connected to the grip.