SU1269014A1 - Device for quality control of building materials - Google Patents

Abstract

This invention relates to a measurement technique for non-destructive testing methods. Designed to determine the strength, uniformity and porosity of building materials. Allows you to reduce energy costs. The device contains a master generator-1, a generator 2 high-frequency pulses, an ultrasonic transducer-emitter 3, an ultrasonic transducer-receiver 4, an amplifier 5, a driver 6 pulses, a power supply unit 7, a driver 8 pulses i switch 9, a generator 10 counting pulses, a time selector 11, (L counter 12 pulses, controlled material 13. The switch includes a trigger and a key. 2 Il.

Description

fig

The invention relates to a measuring technique of non-destructive control methods and is intended for determining strength, uniformity and porosity of building materials and structures over the time of ultrasound propagation, will be most widely used in the building materials industry and in construction.

The purpose of the invention is to reduce energy consumption.

Figure 1 shows a device for controlling the quality of building materials; figure 2 - switch.

The device contains a generator 1, a generator of 2 high-frequency pulses, an ultrasonic transducer-emitter 3, an ultrasonic transducer-receiver 4, an amplifier 5, a pulse shaper 6, a power supply unit 7, a pulse shaper 8, a switch 9, a generator of 10 counting pulses, a time selector 11, counter 12 pulses. Material 13 is monitored. The switch contains a D-trigger 14, a key 15.

The device works in the following way.

The master oscillator 1 generates a negative sequence: electrical pulses with a frequency of 1 Hz and a duration of several microseconds. The negative edge of these pulses starts the generator.

2 high-frequency pulses, which signal excites in an ultrasonic transducer-emitter

The 3 impulse of the ultrasonic oscillation introduced into the controlled material 13. The positive differential of the control pulses of the master oscillator is set to O along the R-run of the trigger 14 of the switch 9, which turns on the power of the generator 10 of the counting pulses, the time selector 11 and the pulse counter 12, which is installed the same signal processed in the imaging unit 8, as well as the opening of the time selector. After opening the time selector, the pulses; time stamps start coming from the output of the counting impulse generator sov input pulse counter.

Ultrasonic (ultrasonic) oscillations, having passed a controlled material, are fed to the ultrasonic transducer-receiver 4 and are converted

there is an electrical signal which is amplified in the amplifier unit 5 and is fed to the input of the imaging unit 6. The electrical and functional circuit of the imaging unit is identical to that of the imaging unit 8, and their purpose is to generate an electrical signal of the normalized amplitude and duration from the incoming input signal. The front edge of the oscillation amplified and formed in the amplifier and driver closes the time selector by setting the switch trigger 1 at the S input, turns off the switch and removes the supply voltage from the blocks of the counting pulse generator, time selector and pulse counter (counter display circuit, conventionally not shown, the devices are not de-energized during operation. In the case of the absence of ultrasonic oscillations at the transducer / receiver, the switch is turned off by setting 1 trigger on the C input of the overflow pulses of the last decade of the counter. The measurement cycle ends there.

The power supply unit 7 supplies power to all units of the device, except for the ultrasonic transducer-emitter and receiver, which are passive elements, as well as the time selector, the counting pulse generator and the pulse counter, which are powered from the switch. The nodes of the time selector, the generator of counting pulses and the pulse counter, assembled on integrated circuits of the TTL, operate in pulsed cutting and consume power over the power supply equal to

T .com

Р Р

tuJ 1000

 (ton

where Р „„, is the maximum power

consumption;

- the nominal capacity of the sweaty child without a key; T 1 s is the repetition period of clock pulses of the start of the starting generator; t 999.9 ISS - maximum time

open the switch. During the operation of the device, the opening time of the switch is much shorter (the measurement time in the operating mode is 50-100 microseconds) and the power consumption of the switched nodes decreases by another 10-20 times.

Claims (1)

Claim An apparatus for monitoring the quality of building materials, comprising a reference generator, a first output Ko torogo ₅ is connected to a first input of high frequency pulse generator, whose output is connected to an ultrasonic transducer-emitter, and the ultrasonic preobrazovatel- th receiver is connected to a first input of an amplifier whose output is connected to the first input of the first pulse shaper, the output of which is connected to the first input of the temporary selector, the output of which is connected to the first input of the pulse counter, the second the path of which is connected to the input of the second pulse shaper, the first input of the second pulse shaper and the second input of the temporary selector are connected to the second output of the master oscillator, the second inputs of the pulse shaper, amplifier, high-frequency pulse generator and the input of the master oscillator are connected to the power source, the generator output counting pulses connected to the third input of the temporary selector, characterized in that, in order to reduce energy consumption, it is equipped with a switch consisting of a series of about interconnected trigger and key, and the first input of the trigger, which is the first input of the switch, is connected to the second output. to the master oscillator, the second trigger input, which is the second input of the switch, is connected to the output of the first pulse shaper, one of the key inputs and the third trigger input are combined and are the third input of the switch that is connected to the power supply, the fourth trigger input is the fourth input of the switch, which is connected to the output of the pulse counter, the output of the key, which is the output of the switch, is connected to the input of the counter pulse generator, the third input of the pulse counter and the fourth time input nnogo selector. FIG. 2