JPS5932865A - Ultrasonic wave inspector - Google Patents

Abstract

PURPOSE:To record data such as distance to a defect and amplitude by measuring the thickness of a material to be inspected and sound velocity upon contact of a probe therewith by arranging probes for detecting a wave transmitting the material being inspected and a distance detector for detecting the distance therebetween. CONSTITUTION:When a transmission wave is received with an R probe from a material to be inspected interposed between a transmitting/receiving probe and the receiving R probe, as the existence of a defect in the material being inspected is not conceivable, the sound velocity of the material being inspected is computed with an arithmetic unit 48 based on the output of a V/f converter 34 and the output of a time measuring section 39. When a defect exists, the level of the transmission wave lowers or won't be received, the output of a reflected wave receiver 37 is provided to a time measuring section 41 to measure the ultrasonic wave propagation time from the surface to the defect and the distance from the surface of the material being inspected to the defect is computed with a thickness computing unit 49 from the sound velocity and the ultrasonic wave propagation time. The results are recorded on a recorder 44 and indicated on a display 14 together with the outputs such as echo height from an A/D converter 42.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for non-destructively inspecting the inside of a utility vehicle using ultrasonic waves. As a means of finding defects in solid objects made of zero metal, we decided to inject ultrasonic waves into the material, capture the reflected waves from the defects (hereinafter referred to as echoes), and display them on a display such as a CRT. There is an ultrasonic inspection device as a device for measuring the size of a defect and the monthly defectiveness of the device.

First, one conventional device of this type will be explained with reference to Fig. 3-1. In the figure, (1) is a synchronization section that generates the same M signal necessary for each circuit, (2) is a transmission section that generates a transmission signal based on the output signal from the synchronization section, and (3) is a transmission section that generates a transmission signal based on the output signal from the synchronization section. (4) converts the transmitted signal generated from the transmitting section into an induced sound signal and injects the ultrasonic wave into the specimen material, and the reflected wave from the specimen material described in (4) is (5) is the upper air f14- from the J1 probe.
``Receiving section that outputs ``'r4J'', (6) is a display such as CR'1'' M product that displays the output of the above-mentioned receiving section, (7) is L
a peak value detection circuit that detects the maximum value of the output of the recording/receiving section;
(8) is a time measurement circuit that measures the ultrasonic propagation time from the 1-Hakama 14 signal and the ultrasonic waves -■~Coco-No.; (9) is a hold circuit that boldly utilizes the above time measurement circuit; (1)
0) is the sound velocity that determines the Do 1 rule for the test month from the ultrasonic propagation time obtained by the hold circuit (9) above and the thickness of the material to be tested set by the setting device (11) 05). measurement circuit,
t12) is a storage circuit that stores the sound velocity value of the test (3) obtained by the second measurement circuit tlLl+, (1
3) is the test object (A) recorded in the memory circuit (I2).
f! by the sound 1i11 value and the time measurement circuit (8). j
E) A propagation distance 1 measurement circuit that calculates the ultrasonic propagation distance from the ultrasonic propagation time f', (14) is the value of the ultrasonic propagation distance obtained by the ultrasonic propagation distance measurement circuit (13) and Displays the sound velocity value of the test material stored in the memory circuit.
It is a display device. When trying to measure the distance to the defect on the test piece H, first, in order to find the sound velocity of the test piece 2 setting, the probe (4) is brought into contact with the part of the specimen measured by the scroll described in 1-, and the time measurement circuit (8) calculates the ultrasonic propagation time from the transmitted signal and the ultrasonic echo. Measure - 111 time measurement circuit (8
) and the setting device (1
1) From the thickness of the test material set in 1), the 11-speed measurement circuit t1
．． At 0+, the sound speed is determined as V=w/l (V: sound speed of the test material, W: thickness of the test material, t: ultrasonic propagation time). When determining the thickness up to the defect, set the frame angle 1! to the material to be inspected (3).
WT=V・
t' (WT-thickness to defect, ■: sound velocity of test material, t'
: ultrasonic propagation time from the surface to be inspected to the defect) and 17 to determine the ultrasonic propagation distance.

Now, with the device shown in Figure 1, in order to measure the distance (thickness) to the defect, the speed of sound must be measured in advance, or it must be indexed from literature, etc. In order to measure, measure the thickness of the material to be tested in advance,
In addition, the settings must be set on a setting device, and the records after inspection are manually performed by humans. When inspecting objects with uneven thickness using ultrasonic waves, it takes a lot of time, and it is difficult to record the records after inspection. Because it is often impossible to read changes due to temperature in sound velocity data, there are drawbacks such as unreliability of data on distance to defects and poor recording performance.

This invention was made in order to eliminate these drawbacks, and in addition to the conventional transmitter and probe, it also includes a probe that detects waves transmitted through the test material and a probe that detects the distance between the probes. It consists of multiple distance detectors and is equipped with a recorder to process and record each signal, and when the probe touches the measurement point, the thickness and sound speed of the material to be inspected are measured, and defects are detected. In such a case, the present invention provides an ultrasonic inspection device configured to record the distance to the defect and data such as imaging.

□Examples of the invention will be described below with reference to Fig. 2. In Figure 2, (11 is a synchronizing section that generates a synchronizing signal, (16) is connected to the synchronizing section (1) and counts a predetermined number of synchronizing signals, and (1η is the output signal of the counter (16)). Transmitter 1 that generates a transmission signal based on (1) Shift register 1 that generates the timing of (1)
, Decoy is the shift V which generates the noise of the transmitter 2Q1) which generates the transmission signal based on the output signal of the shift register,) Suff2, (l!l) is the 02th shift register's Transmitter Le that generates a transmission □ signal based on the output signal (shift register Th that generates the timing of 2 hot water,
E converts the transmitted signal generated by the transmitter V@ into an ultrasonic signal, and the specimen material (3) receives the ultrasound, and converts the reflected wave from the specimen material (3) into an electrical signal. Transmitting/receiving (hereinafter referred to as T/R) probe! , [24+ is the T/R probe 1 (for receiving (hereinafter referred to as R) that converts the ultrasonic waves generated from 2 and transmitted through the test material (3) into electrical signals) probe 1, (the moth is The above Le-R probe 1, (
23) and the R probe 1 (241), a distance detector 1 detects an electrical signal proportional to the distance between the transmitter 2 (21), and converts the transmitted signal generated from the transmitter 2 (21) into an ultrasonic signal to be detected. T/R probe 2 which injects ultrasonic waves into the material (3) and converts the reflected waves from the material (3) into electrical signals (271 is generated by the T/R probe 2 IAl). The I probe 2, I28) that converts the ultrasonic waves transmitted through the test material (3) into electrical signals is located at the distance between the above 'J'/R probe 2 f261 and the above R probe (27). A distance detector 2 detects an electrical signal proportional to , and a seagull is the transmitter n
G! Converting the transmitted signal generated from the dryness into an ultrasonic signal and injecting the ultrasonic wave into the test material (3) (2) Converting the reflected wave from the test material (3) into an electrical signal Tentacle 1
'Ls f30) is generated by the above T//R probe probe wave and is converted into an ultrasonic electrical signal transmitted through the test material. Probe n is a distance detector that detects an electrical signal proportional to the distance between the prisoner and the above 1 (probe n [30)], and the country is the above distance detector 1 (2).
51 to the above-mentioned distance detection 4g" fal) of the output signal from the transmitter l to the transmitter n (221
Selects a signal corresponding to the voltage/frequency (hereinafter referred to as V/F) that converts into a pulse signal, and controls the switch (33) for outputting it to the converter C141, as well as setting the gate signal and the amplitude within the gate r17. (35) is a controller that controls the gate generator (to) that sets the value of Beam probe 1 (241 to the above ■) (probe rb (electrical signal P converted at 301)
From + to P□, the switching device (
Drowning output 1'o (transmitted wave receiver that increases lJ, 0 power is the electric signal converted from inside the T7R probe 2 to the T/R probe 2) Of the power from R, it is controlled by the above 11JIJ controller (32) (υ changer (3
3) a reflected wave receiver with an output RO (471 multiplied by 11);
(361 is a comparator that compares the output □ signal of the transmitted wave receiver (35) with the output signal □ of the gate generator Chill, and (39) is a comparator that compares the output signal □ of the transmitted wave receiver (35). An example of the time measurement section □ PsI is to measure the propagation time of the ultrasonic wave transmitted through the test material (3). 3
) M output V. (4 chants = Pulse signal with proportional frequency and the above time a1 measuring unit tP (3 (g)) Calculator Ver.
11 is a switch that opens and closes the output signal of the reflected wave receiver (371) from the output signal of the comparator (36), (41
) □ was controlled by the switch (40) above.
The output signal of the second reflected wave receiver Cm is calculated from 1'+
A time measurement unit tR, which calculates the time from the surface of 31 to the defect or foul wave from the bottom of test 4jt+31 by the 81 rule,
4j - 1 - time R (measurement part t R (ultrasonic propagation time from the surface of the material to be inspected (3) determined by 4111 to the defective wave from the bottom surface of the material to be inspected (3)) (4111) From the surface of the test material (3) to the sound velocity of the test material (3) measured by R1 from 2,
3) a thickness calculator for determining the thickness to the defect or bottom surface;
(42) is an A/D that converts the output signal of the switch (reflected wave receiver +37 controlled by 401) into digital.
Converter, (43) is a D/A converter that converts the data stored in the memory circuit 02) into analog data according to the control signal of the hC controller 2), and (44) is the 1)/A
The ultrasonic waves generated by the T/R probe 1 section 3), which is a recorder such as a recorder or a printer that records the output signal of the converter (32), are transmitted between 1-R probe 1 f241. If there is no material to be tested, the above R probe 1
(It is received at 241 and output signal P overlaps, and the above-mentioned switch (
33). The switch (33) is the same Jυ1 as the shift register 1, and serves as an operation trigger for the transmitter 1a) and an input P for the transmitted wave receiver (35). 1 (probe-f'-1 (output signal P of 241, and -L
The human power R6 of the above-mentioned radiation receiver (37) and 111 '('/
R probe) output No. 11 R1 and the output of the input V (1 and the distance 1 vertebra detection 'i4w' t25) of the /f converter (34) which converts the electric ratio into a frequency 811-+ ■ A control that controls the connection of the 1st signal (lit device): By being selected by the 3rd control signal, the n-bar 'II/R
The output signal R6 corresponding to the probe and the range detectors of ■゛o and nran corresponding to the R probe of nff61 are
■ Output signal. are selected and output with the same number of 1υj.

The material to be tested is the output of the above 1-R probe I (if there is no intermediary between the probe and the θ piece I V-/f converter) and the above Based on the output of the time R1 measuring section tE' (39), the test object 4 is interposed between the C1-1-log probe and the R probe 112, and the R probe To the child”, SuiAi
il = "If 4 waves are received, it is unlikely that there is a defect in the test object I4, so the output of the v4 converter (34) and the output of the -1L time di side tP f39+ are also The sound velocity of test subject 4 is −(the above computing unit VeI・(48
). In addition, if the material to be tested is interposed between the R probe and the R probe described in -1- and there is a defect, the ultra-n waves incident on the material to be tested will be reflected by the defect. !4[:
'The transmitted wave level received by the floor frame probe and received by the R probe decreases or is not received. Therefore, the output of the L period transmitted wave receiver (35) is converted to the JlnL gate generator (3
8) Compare the quantification level with the gate for monitoring the transmitted wave generated by C, and if the transmitted wave decreases or does not exist, close the switch (40) and output the reflected wave receiver (38). The time measurement unit tR (411) measures the ultrasonic propagation time from the surface of the material to be inspected to the defect and outputs it to the thickness calculator +49. .In the thickness calculator (49), the sound velocity of the test object 4N is calculated by the calculator VeL (481's output tone scale and the upward self-time d) measuring section tR (411's output ultrasonic The distance from the surface of the test object H to the defect is calculated from the propagation time and stored in the storage circuit (12).The output of the reflected wave receiver when the switch (40) is closed is output from the A/D
It is converted into a digital value by a converter (42) and stored in the storage circuit (12).

The thickness calculator (4) stored in the storage circuit (12)
The output of the thickness of 9) and the output of the echo height etc. of the A/D converter (4) are converted into analog values by the controller (the D/A converter 'r!'; f43) according to the control sub-signal of 321. is converted into the above recorder (441) and is recorded on the upper d1
:Display (14)-\nomo is displayed.

Note that this invention is applicable not only to non-destructive testing as an ultrasonic application but also to the medical field. That is, in the above embodiments, the ultrasonic examination device ((A1) was described, but a dental ultrasonic diagnostic device and ultrasonic thickness R having similar functions are used.
What can be applied to 1 can be analogized to an audience.

As explained above, according to the present invention, the thickness of the material to be inspected or the speed of 12Y or 17i can be determined without determining the speed of sound in advance. (Can be displayed on recording paper or display
It has the advantage of being able to carry out detailed inspections and recordings that are desirable in X-ray radiography, since it has several RIF's for ultrasonic transmission recording.

[Brief explanation of drawings]

Figure 1 is a configuration diagram of a conventional ultrasonic inspection device, and figure 10.2 is the actual percentage of this invention! Ultra wave inspection device uj showing i 1+J
It is a haze configuration diagram. In the figure, (1) is the synchronization part, (2) is the transmission part, and (3) is the test subject 4.
A, (4) is the probe, (5) is the receiver, (6) is the display, (7) is the detection circuit, (8) is the time measurement circuit, (9) is the hold circuit, (Iα is the speed of sound Measuring circuit, (Ill is a setting device, (1 is a memory circuit, (13) is a distance measuring circuit, ()
41 is the display, (15) is the thickness of the material to be inspected, (16+ ha counter, 0η is shift register 1, (18+ is shift) register 2, <19+ is shift register, (2
))) is transmitter 1, +211 is transmitter 2, (2 along transmitter, field) is T/1 (probe 1, 1241 is R probe 1, (2,5+ is distance detector l, (2)) is T/
R probe 2, (77) is R probe 2, 128+ is distance detector 2, (2m is T/R probe n, (30) is R probe 1, (31) is distance detection ci2+ is the controller, +33) is the switch, (34) is the V/f converter, (
The bullet is a transmitted wave receiver, (31ii is a comparator, C (7) is a reflected wave receiver, (38) is a gate generator, (39 is a time measurement unit tP, (4 (p is a switch, ( 41) is the time measurement unit tR, [42] is the M] converter, (43) is the I)/A converter, (44) is the recorder, 1B) is the arithmetic unit VeL, (4
9) is thickness performance W: vessel. In addition, the same or equivalent parts in the drawings are indicated by the same reference numeral t. Agent Shin Kuzuno - Figure 1

Claims (1)

[Claims] (11) A synchronizing section that generates a synchronizing signal, a counter that counts a predetermined number of signals from the synchronizing section, and sequentially shifting the synchronizing signal of the synchronizing section based on the output signal of the counter. a plurality of transmitters that generate transmission signals based on output signals of the plurality of shift registers, and transmitters between the plurality of transmitters,
Converts the transmitted signal into an ultrasonic signal and injects the ultrasonic wave into the test material, and converts the reflected wave from the test material into an electrical signal. ・Multiple transmitting/receiving probes and the above transmitting/receiving probe. The transmitted ultrasonic waves incident on the above-mentioned material from the probe are
Distance detection between multiple receiving probes that convert into electrical signals, detecting electrical signals proportional to the distance between the transmitting/receiving probe/probe, and the receiving probe. an electrical signal of a transmitted wave from the test material obtained by the receiving probe; an electrical signal of a reflected wave from the test material obtained by the transmitting/receiving probe; A switch that switches the output signal of the distance detector using a small power signal from a controller that generates a control signal based on the synchronization signal from the synchronization section, and a switch that switches the output signal of the upper 8C distance detector and voltage output signal. A voltage/frequency converter converts the transmitted wave output obtained by the receiving probe into a pulse waveform through the switching device ( ≧Transmission/reception] The reflected wave output signal seen by the probe is transmitted through the upper self-section device to the reflected wave receiver that amplifies and burns the reflected wave output signal, and the control output signal from the controller is sent to the 1 gate. A comparison is made to compare the gate generation amount that outputs the signal and the gate internal 9 call level, the output signal of the gate generator and the output signal of the transmitter, the transmitter, and the transmitter. a time measurement unit that totals 6111 the propagation time of the transmitted wave based on the output signal; and the time measurement decoy;
I#7 signal and above, output signal of electromotive force/frequency converter! According to the above, there is also an arithmetic unit that quasi-calculates the sound velocity of the object to be tested, a switch that opens and closes the signal of the upper eyelet reflected wave receiver based on the output of the estimator, and an output signal of the switch. a time measurement unit that measures the propagation time of the reflected wave;
a thickness calculator that calculates the thickness from the test material to the reflected wave based on the sound velocity output signal and the output signal of the time R1 measurement section tR; A/']) converter; a storage circuit that stores the output signal of the thickness calculator and the output signal of the A/D converter according to the control signal of the converter; 1-A D/A converter that converts the data in the memory circuit into analog data using a control signal from the controller; and a display that displays the output signal of the 1)/A converter; A recording device (printer, recorder, etc.) for recording the output signal of the converter is provided in the IJ/, and the speed of sound is calculated based on the output of the transmitted wave receiver and the output of the distance detector. Ultrasonic transmission image h characterized by:. (2) The plurality of transmission/reception probes are sequentially driven by the plurality of shift registers and the transmitters of the plurality of locks recorded in - to inject ultrasonic waves into the specimen material, and -1
- J "Output of 100 million circuits -" L - Output to the above recorder in correspondence with the multi-concave transmitting/receiving probe or receiving probe and record the ultrasonic transmission image and the distance of the reflected wave from the defect. The ultrasonic inspection apparatus according to claim 1, wherein the ultrasonic inspection apparatus is configured to record the height of the reflected wave from the defect. +3+ -J: =12 Calculate the distance to the -C reflected wave using the output of the time measuring unit and the output of the -T display unit, and record the distance and record the distance on the -recorder and the above display. The ultrasonic inspection apparatus according to claim 1, characterized in that it is configured to perform display.