DEVICE FOR MEASURING CONCRETE STRENGTH Russian patent published in 2024 - IPC G01N3/317 G01N33/38 

FIELD: measuring.

SUBSTANCE: invention relates to investigation of properties of materials and can be used to measure strength of concrete by non-destructive testing. Device comprises a striker placed inside the solenoid winding, on the rear side of which a variable mass surcharge is fixed, an adjustable source of alternating electric current connected to said winding, piezoelectric gyroscope sensor attached to the weight with the possibility of determining the striker deviation from the normal to the surface of the analysed concrete sample, and a piezoelectric sensor configured to detect mechanical vibrations occurring in said sample during its impact loading, wherein the piezoelectric sensor electrodes are connected to the inputs of the high-pass filter, the output of which is connected to the inputs of the frequency meter and the attenuation coefficient meter, and the output of the piezoelectric gyroscope sensor is connected to a servo drive fixed on the solenoid with the possibility of correcting the position of the striker in relation to said sample. Striker is threaded in its lower part and is equipped with a nut that can move along the said thread with control of the value of the striker lift above the surface of the analysed concrete sample.

EFFECT: use of the invention makes it possible to increase accuracy of measurements.

1 cl, 1 dwg