SU1748015A1 - Device for testing strength of building materials - Google Patents

Abstract

Use: in the field of construction to study the physicomechanical properties of building materials. The essence of the invention: the device includes a housing, a cylindrical drummer, a striker and a measurement sensor, a trigger mechanism, a recording and control unit. The device is equipped with temperature and readiness sensors. The measurement sensor is made in the form of an annular magnetoelastic element with a toroidal winding, buffer elements, is placed in the cavity of the impactor, 1C. f-ly, 2 silt,

Description

The invention relates to the construction, in particular to the study of the physicomechanical properties of building materials.

A device is known for determining the strength of building materials, including a housing, a drummer, a sensor, and a trigger mechanism.

This device is characterized by complexity and lack of reliability.

Closest to the invention is a device for determining the strength of building materials, comprising a housing, a cylindrical hammer with a striker and a measurement sensor, a trigger, and a recording and control unit.

A disadvantage of the known device is low accuracy.

The purpose of the invention is to improve accuracy.

The goal is achieved by the fact that the device for determining the strength of building materials, comprising a casing, a cylindrical drummer with a striker and a measurement sensor, a trigger mechanism and a recording and control unit, is equipped with a temperature sensor and a readiness sensor electrically connected to the measurement sensor, the hammer is made with a cavity briskly, the measurement sensor is made in the form of an annular magnetoelastic element with a toroidal winding, on both sides of which there are buffer elements in the form of annular ferrites, and yes The measurement pin is placed in the cavity of the striker coaxially with it, the temperature sensor is inside the annular magnetoelastic date element

The measurement sensor, and the readiness sensor, behind the drummer, together with the trigger mechanism. In addition, the ready sensor is configured to turn on the power of the toroidal winding and is placed between the trigger mechanism and its trigger button.

In FIG. 1 shows the device, general view, section; Fig. 2 shows a measurement sensor, section.

The device for determining the strength of construction materials comprises a housing 1 in which a cylindrical drummer 2c is located 3, and a measurement sensor 4 is placed in the cylindrical cavity of the impactor 2; On both sides of the annular magnetoelastic element 5 are placed the buffer elements 7, made in Hades of ring ferrites. Inside the annular magnetoelastic element 5, a temperature sensor 8 is placed, the sensor 9 is ready to turn on the switch and is located by the trigger 10 and its trigger button 11, the hammer 2 moves along the guide pin 12, which is located in the longitudinal nasv of the drummer 2.

The spring 13 abuts one side against the collar 14 of the guide rod 15 and the other side against the cover 16. The winding 6 is connected via the sensor 9 ready to the recording and control unit 17. The device rests against the test material 18 by the housing 1.

The device works as follows.

The shock spring 13 is compressed by pulling the guide rail 15 by the handle until it stops and the device for striking the test material 18 is cocked. Pressing the start button 11 activates the readiness sensor 9, through which the measurement sensor 4 is connected to the registration unit 17 and management. A temperature sensor 8 is connected directly to a control registration unit 17 IA which records and stores temperature values.

em

The trigger mechanism 10 is then triggered and, under the action of the spring 13, starts the reverse movement of the guide rod 15, conjugated with the pick 3 and the measurement sensor 4, before striking the test material 18, the Recording and Control Unit 17 disconnects the measurement sensor 4 after striking at

15

25

thirty

35

40

45

50

55

test material 18. Disconnection from the power supply of the measurement sensor 4 after the measurement procedure eliminates the increase in its temperature in the intervals between measurements, due to the heating of the toroidal winding 6. This increases the accuracy and temperature stability of the measurement. According to the measurement data, the temperature sensor 3 and the registration and control unit 17 correct the measurement result.

Buffer elements 7 in the form of ring ferrites in the liquefies are compensatory and elements are made of the same magnetic material. When measuring temperature and mechanical effects over time, fluctuations in the volume of the material occur. Since: Ese three rings 5 and 7 are made of the same material and have the same coefficients of linear expansion and mechanical properties, due to this, the shear volume of the material of the main measurement sensor 4 is compensated.

Thus, the measurement sensor 4 and the introduction of the temperature sensor and the readiness sensor 9 allow to improve the measurement accuracy, so K-JK is basically a flame; e 5 eliminates the additional measurement error from the influence of the linear expansion of the hammer 2, the temperature sensor 8 takes into account the temperature the tested location, g sensor 9 eliminates the warming up of the sensor and 4; -; a zero charge and a thermal error, as well as a decrease in the energy consumed by the device.

For p m in l and inventions

Claims (2)

1. A device for determining the strength of building materials, comprising a casing, a cylindrical drummer with a striker and a measurement sensor, a trigger mechanism and a recording and control unit, which is required for In order to improve accuracy, the device is equipped with a temperature sensor and a readiness sensor electrically connected to the measurement sensor, the drummer is made cavity behind the die, the measurement sensor is made in the form of an annular magnetic elastic element with a toroidal winding, on both sides of which there are buffer elements in the form of ring ferrites, while the measurement sensor is placed in the cavity of the striker coaxially with it, the temperature sensor is inside the annular magnetoelastic element of the measurement sensor, and the readiness sensor is behind darnik with trigger 2. Device pop. 1, that is, the readiness sensor is configured to turn on the power of the toroidal winding and is placed between the trigger mechanism and its trigger button. 77777777 / fti tf i gee & al t.-rfa.TSS article kt gv svoga ™ a. h "tt gfigvv: h ) /// //  7 -5I / t T