RU95103005A - Universal tester of construction materials for compressive strength and hardness - Google Patents

Abstract

FIELD: instruments for non-destructive testing of materials in civil engineering, scientific research and other applications. SUBSTANCE: indenter-acting instrument has striker 1 with replaceable ball indenter 2 with arm catch 3, working spring 5, barrel 5, arm pin 6, moving member of displacement sensor 7, body 8 with handle and funnel-shaped bevel 9 for release of striker, spring 10 for return of barrel in body, L-shaped levers 11, spring-loaded moving orientator 12 for direction test blow, electronic control unit 13 with adapter for fixing and indication of visual information of test results. Spring- loaded orientator has supporting rods 13, splined bush and spring. Striker catch unit includes catch axle, spring bush, catch spring and catch head. Electronic control unit is made up of sections to form an analogue signal which is proportional to displacement of probe into recess resulted from sclerometric blow, analogue-digital converter integral with digital indication section, voltage converter section. Instrument is used by holding it in one arm. It is applicable for testing undulated surface. EFFECT: high efficiency. 3 cl, 5 dwg

Claims (1)

The invention relates to instrumentation, in particular for determining the strength characteristics of building materials by non-destructive method, and is intended for use in construction, the production of building materials, research and experimental work. The purpose of the invention is the creation of a universal sclerometer device that provides the ability to determine the strength characteristics of building materials and structures with various surface topography, the possibility of visual information and the fixation of measurement indicators, increased test accuracy, simplified design and increased service life of the device. The device consists of a striker 1 with a removable ball indenter 2 and a cocking latch 3, a working spring 4, a barrel 5, a cocking pin 6, a moving element of the displacement sensor 7, a housing 8 with a handle and a funnel-shaped bevel 9 for disengaging the striker, spring 10 for returning the barrel to case, L-shaped levers of a platoon 11, a spring-loaded movable orientator 12 of the direction of the control strike, an electronic unit 13 with an attachment for fixing and displaying visual information of the measurement data. The spring-loaded movable orientator comprises support rods 15, a spline hub and a spring. The striker latch assembly comprises a latch axis, a spring sleeve, a latch spring and a latch head. An electronic unit is a device consisting of units that form an analog signal proportional to the probe moving into a recess from a sclerometric shock, an analog-to-digital converter combined in an LSI together with a digital display unit, and a voltage converter unit. Use the device as follows. Holding the device with one hand on the handle, with the other cock the striker by raising the L-shaped platoon lever until the striker is locked with a latch. The cocked device is placed with the orienter on the test surface and pressed with increasing force, while the body is pushed onto the barrel from the side of the handle and bevels the striker latch out of engagement, striking with an indenter that is pressed into the product. The penetration depth through the moving element of the displacement sensor is fixed by the electronic unit, being converted into visual-digital information.