SU1456875A1 - Ultrasonic flaw detector - Google Patents

Abstract

The invention relates to the field of non-discriminatory quality control of products and can be used for automated control of products. The purpose of the invention is to increase the productivity of control by automating the process of setting up the flaw detector. Configuring the flaw detector operation mode is simulated by going through a discrete set of options for tuning the generator, amplifier, and piezotransducer with the memory of the option providing the optimal tuning mode. 1 il.

Description

one

The invention relates to the field of nondestructive quality control of ideals and can be used for automated control of products.

The aim of the invention is to increase the monitoring performance by automating the process of setting up the flaw detector.

The drawing shows the block diagram of the ultrasonic flaw detector.

The ultrasonic flaw detector contains a series-connected clock generator 1, a generator of 2 pulses, an electro-acoustic transducer 2 and an amplifier 4, a starting device 5 (one-shot), a cell

6, for example, counter 7, register 8, com -, - mutator 9, trigger 10, block 11 of differentiation and converter 12 codes, information outputs of the counter

7 are connected to the information inputs of the register 8 and the first group of inputs of the switch 9, the overflow output of the counter 7 is connected to the first input of the trigger 10, the outputs of the register 8 are connected to the second group of inputs of the switch 9, the outputs of which are connected to the inputs of the converter 12 code, the output of the memory cell 6 through The differentiation unit I1 is connected to the control input of register 8, the output of the trigger 10 is connected to the control input of the switch 9, the second input of the trigger is combined with the control input of the memory cell 6 and the reset input of the counter 7 and is connected to you the start of the starting device 5, the information input of the memory cell 6 is connected to the output of the amplifier 4, the counting input of the counter 7 - with the output of the clock generator 1, the output of the 12 code converter - with the tuning control inputs

which generator 2 pulses, amplifier A and electro-acoustic transducer 3,

The flaw detector works as follows.

The clock generator 1 periodically sends clock pulses to the start input of the generator 2 pulses and the counting input of counter 7, increasing its content by one. For each clock pulse generator 2 pulses excites electro-acoustic transducer 3, which sends a pulse of ultrasonic oscillations to a controlled product (not shown). This pulse, reflected from the bottom. (Or the edges) of the product, is applied to the electro-acoustic transducer 3, converted into an electrical signal and amplified by an amplifier 4. From the output of the latter, the signal enters memory cell 6. Cell 6 of the memory is built on the principle of a pico-detector and stores the maximum amplitude of the signal. Through the differentiation unit 11, the rising edge of the voltage of the memory cell 6 is fed to the control input of the register 8 and records the contents of the counter 7 corresponding to this amplitude of the signal in it. Through the switch 9 and the converter I2 of the code, the contents of the counter 7 are transmitted (in a transformed form, for example, in the form of an analog signal or some code) to the control inputs of the setting of the 2 pulse generator, the amplifier 4 and the electroacoustic converter 3, the tuning mode of these nodes is determined. It is assumed that the optimal tuning corresponds to the maximum amplitude of the signal. at the output of the amplifier 4.

In the next cycle, the process is repeated with a new, one unit larger, value of the contents of counter 7 If the amplitude of the signal received in the next cycle exceeds any of the previous ones, the contents of memory cell 6 in this cycle increase. The voltage rise front of the memory cell 6 is transmitted through the differentiation unit 11 and writes to the register 8 n

The new value of the contents of counter 7. If the amplitude of the signal in a given clock cycle is less than that stored in cell 6 of the memory according to the results of operation in the previous clock cycles.

then the signal does not pass through the differentiation unit 11 and the contents of register 8 is saved. The process repeats before filling the counter 7, so that the number of cycles for which the operation modes are analyzed is equal to the capacity of the counter 7. After the counter 7 overflows with a pulse from its overflow output, the switch state changes with its output signal . 9, which by / 1 includes the code stored in the memory of register 8 by the inputs of the converter 12 of the code. This code records the operation mode of the defect detector, which ensured the maximum value of the received signal. If it is necessary to rebuild the flaw detector to a new mode, for example, when changing the assortment of monitored items, the flaw detector will be transferred to the initial search mode for the optimal setting by a signal from the starter 5.

Invention Formula

An ultrasonic flaw detector containing a series-connected clock generator, a pulse generator, an electroacoustic transducer, and an amplifier that, in order to increase the monitoring performance, it is equipped with a starting device, a memory cell, a counter, a register, a switch, a trigger, a differentiation unit and a code converter, the information outputs of the counter are connected to the information inputs of the register and the first group of inputs of the switch, the output of the overflow of the counter is connected to The first trigger input, the register outputs are connected to the second group of switch inputs, the outputs of which are connected to the code converter inputs, the output of the memory cell through the differentiation unit. Connected to the control input of the register, the trigger output - from the control input of the switch, the second trigger trigger combined with the control input of the memory cell and the reset. input of the counter and connected to the output of the starter, the information input of the memory cell is connected to the output of the amplifier, the counting input of the counter with the output of the clock generator ator, and the output is converted514568756

Code clock - with control inputs. Electroacoustic presetting of the pulse generator, the amplifier.

Claims (1)

Claim An ultrasonic flaw detector containing a clock generator, a pulse generator, an electro-acoustic transducer and an amplifier, connected in series, characterized in that, in order to increase the monitoring performance, it is equipped with a starting device, a memory cell, a counter, a register, a switch, a trigger, a differentiation unit and a transducer code, information outputs of the counter are connected to the information inputs of the register and the first group of inputs of the switch, the output of the counter overflow is connected to the first during the trigger, the outputs of the register are connected to the second group of inputs of the switch, the outputs of which are connected to the inputs of the code converter, the output of the memory cell through the differentiation unit. is connected to the control input of the register, the output of the trigger is connected to the control input of the switch, the second input of the trigger is combined with the control input of the cell memory and reset ·. the input of the counter and connected to the output of the starting device, the information input of the memory cell is connected to the output of the amplifier, the counting input of the counter is connected to the output of the clock generator, and in course preobrazo55 ⁵ 1456875 6 Vatel code - the control inputs. alternator and electro-acoustic pre-tuning of the pulse generator, amplifier.