Apparatus for measuring of moisture parameters of porous materials and method for examination of moisture spreading in porous materials

摘要

Apparatus for measurement of moisture parameters of porous materials comprising a hanger (11) for the experimental specimen, wherein the hanger (11) is fixed to a digital scale (5) above it, below the hanger (11) a container (14) with water (15) is arranged and above the container (14) below the hanger (11) waveguides (8,8a) of microwave radiation are arranged, wherein on the rim of the waveguide (8) a source (7) of the radiation is arranged, which is a Gunn diode, which is connected to a voltage source, wherein in the front of the source (7) of the radiation on the transmitting waveguide (8) a transmitting antenna (9) is arranged and on the receiving waveguide (8a) a receiving antenna (10) is arranged and both waveguides (8,8a), as one unit are stationary fixed on a baseplate (2), wherein from the waveguides to the computer and from the scale to the computer cables are installed, wherein the receiving antenna (10) is connected via a voltmeter to the computer, wherein on the baseplate (2) a pair of guiding rails (3) is fixed, wherein on the guiding rails (3) a frame (4) of the scale (5) is slideable arranged, wherein the rear side of the frame (4) of the scale (5) is provided by a screw casing, through which the driving rod (16) is arranged, which is anchored in the engine (6) and the driving rod (16) is on its upper side freely rotatably arranged in the upper casing (24), wherein the computer (23) and the engine (6) are connected by a communication motor cable (19), and the computer (23) and the source (7) of the radiation (6) are connected by a relay communication cable (21), which is provided with a relay (17) intended for switching on/off of the device.