CN2038239U - Portable ultrasonic flaw detector - Google Patents
Portable ultrasonic flaw detector Download PDFInfo
- Publication number
- CN2038239U CN2038239U CN 88214949 CN88214949U CN2038239U CN 2038239 U CN2038239 U CN 2038239U CN 88214949 CN88214949 CN 88214949 CN 88214949 U CN88214949 U CN 88214949U CN 2038239 U CN2038239 U CN 2038239U
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- China
- Prior art keywords
- circuit
- flaw
- emitting diode
- light emitting
- door
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model discloses a flaw detector. Existing flaw detector witch is suitable for the flaw detection of the field steel has the disadvantages of big volume, big power consumption and inconvenient carrying. Because the wave height on the fluorescent screen is adopted to reflect the flaw degree, the accuracy is lower and the general existing equipment is failed when working to-10 DEG. The utility model displays the flaw position through an emitting diode. The sound set display the echo amplitude. The glittering bright point displays the alarm sluice edge. The flaw detector has the advantages of small and portable, cold resistant (can work in-40DEG C-+40DEG C), high sensitivity, etc., and is suitable for the detection of the railway track and the flaw detection of the steel product in field without power supply.
Description
The utility model belongs to defect-detecting equipment.Be mainly used in the inspection and the check and correction of rail head of rail and the various crackles of rail web on the railway, the inspection that also is adapted at doing under other field condition the common metal inherent vice is used.
Existing same category of device adopts oscillatron.The volume and the power consumption of oscillatron are bigger, with battery-driven this kind equipment the 40-50 kilogram weight are often arranged, when train near the time, supervisory personnel one people is difficult to this equipment to be withdrawn circuit, the poor stability of supervisory personnel and equipment.Because existing equipment relies on fluoroscopic wave height to reflect the hurt degree, the supervisory personnel sees on the limit screen limit observation line line state, makes to declare to hinder difficulty.Rail is easily lost at low temperatures, and at some cold districts, winter temperature is low to reach-40 ℃, and general existing equipment can only work-10 ℃ promptly malfunctioning.
The utility model is at the problems referred to above and a kind of portable supersonic defectoscope of special development.
The utility model is mainly being done improvement with the lower part: changed in the present equipment and adopted oscillatron, rely on fluoroscopic wave height to reflect the practice of hurt degree, and the variable speed scanning of employing light emitting diode matrix, the degree of depth of defective can directly be read according near the centimeter scale the bright spot on the light emitting diode matrix display screen, and the branch rate can reach 5 millimeters.Simultaneously, owing to adopted door of echo ratio, the utility model can reflect different flaw echo amplitudes with different sound signals, and the supervisory personnel can estimate the order of severity of defective with the sense of hearing.The utility model has also increased the gate edge and has taken out circuit and add the lightning road, so just can obtain the light emitting diode bright spot of glimmering on display screen, and with the edge of display alarm gate, this has brought convenience for the staff that detects a flaw.
Below, describe in detail in conjunction with the accompanying drawings.
Fig. 1 is a panel layout.(1) is the light emitting diode matrix display screen.
Fig. 2 is the transceiver boards circuit diagram.Voltage stabilizer (2) adopts integrated package 7806; The common emitter push-pull dc-to-ac that inverter (3) is made up of two 8AX81 triodes; Rectifier (4) is a voltage doubling rectifing circuit; Clock circuit (5) is formed inductance connecting three point type, and is formed source electrode by the field effect transistor of another same model and follow output circuit by a field effect transistor 3D04 and an inductance; (6) be the frequency divider of 1:1000, adopt integrated package CD4060; Controllable silicon promotes circuit (7) and is made up of transistor (3DG6) emitter follower; Ultrasound emission circuit (8) adopts controllable silicon 3CT3K; (9) receive amplifying circuit for level Four; (10) be detector amplifier, G
1～G
6Be transistor 3DG6C; Counter switch (11) is made up of integrated package CD4011.Foregoing circuit is prior art.
Fig. 3 is display board circuit figure.Display board is made up of with door (14) and display switch (15) individual position and ten digit counters (12), demonstration and (13), numerical digit.Individual position is made up of 2 integrated package CD4017 with ten digit counters (12), shows with door (13) to adopt integrated package CD4081, and numerical digit adopts integrated package CD4081 with door (14), and display switch (15) is made of R-S trigger and CD4043.These basic circuits are prior art.
The ultimate principle that digital variable speed scanning that the utility model adopted shows is that be divided into some equal portions (every equal portions approximate number microsecond) detection time after ultrasonic with emission.The pairing time period of each R-S trigger " administration " oneself, a light emitting diode was arranged in each time period.All light emitting diodes (1) are transversely arranged, and both sides have that the sound path in steel is the centimeter scale of correspondence with ultrasonic shear waves and compressional wave.Like this, the testing staff need not convert and just can directly read the degree of depth of defective according near the scale the bright spot.
First light emitting diode generally is used for representing first time period, promptly exomonental having or not; Other light emitting diode shows the time period of own institute " administration " successively, shows that promptly sound wave encloses the ripple appearance through having or not in each segment limit successively in communication process.(in so-called " primary reflection " scope, the time period of employing is shorter in detecting as rail in scope that display resolution is had relatively high expectations; The place that resolution requirement is not high (as in " secondaries " scope), the time period of employing is longer; And in sound wave when propagation in probe, then will not show.In single pass, just formed unique digital variable speed scanning like this, thereby both satisfied bigger indication range, made some important section have higher display precision again simultaneously with a spot of light emitting diode.
Fig. 4 is the logic card circuit diagram.It is taken out circuit (19), is added lightning road (20) and demonstration comparer (21) is formed by echo comparer (16), warning circuit (17), warning gate (18), edge.
The echo comparer (16) that the utility model increases is made up of MOS door integrated package CD4081.J
1-1An input termination forward warning gate (18), another input end takes back the ripple signal; And J
1-2The echo input end add and gone here and there resistance R
1Therefore, when warning gate echo amplitude reaches 70%, J
1-1Promptly export positive pulse; Echo continue to raise, and reaches 95% when above, J
1-2Just export positive pulse.The more general integrated analog comparator power consumption of this comparer is low.Dui Ying warning circuit (17) is made up of two parts with it: J
2-3Be the low amplitude warning circuit, negative warning gate is through D
1And C
1Broadening send the Sheffer stroke gate input end.About 300 hertz of alerting signal frequency behind the broadening.J
2-1And J
2-2Forming 1 KHz oscillator, is the high-amplitude warning circuit, adopts integrated package CD4011.Thus, can form two kinds of alarm sounds that echo amplitude is different.
In addition, the utility model has also increased edge taking-up circuit (19) and has added lightning road (20).For the gate before and after edge can be shown, use J on the light emitting diode band
2-1NOR gate circuit takes out edge, gate front and back, forms two narrow positive pulses through R
2And D
2Send the demonstration level shifting circuit.The gate edge shows two bright spots on display screen, easy and echo is obscured.For this reason, increase by one and add lightning road (20), by J
3-2And J
3-3Form 5 hertz of ultralow-frequency oscillators, when its output low level, the burst pulse at gate edge through D
3Short circuit is not shown, and plays a kind of modulating action, makes bright spot flicker on screen at gate edge.J
3-1, J
3-2, J
3-3Adopt integrated package CD4030.
The utility model is work like this: the pulse that clock signal generator (5) produces, behind frequency divider (6) frequency division, starting impulse is provided for counter switch (11), promotes circuit (7) by controllable silicon simultaneously, make ultrasound emission circuit (8) send ultrasonic pulse.Counter switch (a 11) startup position and ten digit counters (12) just begin clock pulse count afterwards.The linear array of light emitting diode (1) is used for by the position of the order demonstration echo of counting.For example, received echo during ultrasonic the 14th clock period in emission, at this moment the 4th of digit counter and first of ten digit counters are noble potentials, the noble potential of the latter and echo show with door (13) in, the weighting ten digit pulse noble potentials that produce again in numerical digit and door (14) with a digit pulse with, make the 14th numerical digit and (14) export a noble potential.This noble potential is set to electronegative potential with the 14th switch in the display switch (15), thereby the 14th light emitting diode lighted, and showing in this clock period has echo.When launching ultrasonic pulse, the pulse of closing that counter switch (11) is sent here is put back high level with all display switches (15), closes demonstration next time, and counting shows again then.
When emission was ultrasonic, counter switch (11) started warning gate (18), and one section special time emission after ultrasonic divides the time of detection of echoes and warning into.Owing to adopted echo comparer (16), the output of two comparison doors starts two warning circuits respectively, makes detector amplifier (10) can produce two kinds of different alarm sounds to the echo of different amplitudes.Echoed signal shows with door (13) and goes demonstration through showing that comparer (21) is just delivered to behind detector amplifier (10), and demonstration is also sent to by comparer in the gate edge that adds after the sudden strain of a muscle.
Embodiment 1.To be divided into 40 five equilibriums detection time, the about 3.3us of every five equilibrium.Variable speed scanning shows adopts 20 light emitting diodes to come " administration " 20 time periods.The 1st diode displaying is exomonental has or not, and the 2nd～16 light emitting diode shows the echo of the 5th～19 time period successively.The 17th～20 light emitting diode then shows four zones respectively, and every district was made up of 5 time periods, i.e. 20～24,25～29,30～34,35～39 4 districts.Like this, from the panel display screen, on behalf of ultrasonic longitudinal and transverse ripple sound path in rail, preceding 16 light emitting diodes each be respectively 10 millimeters and 5 millimeters, is common primary reflection scope approximately.Each represents 50 millimeters and 25 millimeters 4 light emitting diodes in back, is common secondaries scope approximately.
R in the echo comparer
1Be 300K Ω.
The utlity model has light small and exquisite, cold-resistant (can be operated in-40 ℃～+ 40 ℃), the advantages such as sensitivity height are applicable to that railway track detects and the steel flaw detection in open-air non-transformer place.
Claims (3)
1, a kind of portable supersonic defectoscope, by light emitting diode, inverter, rectifier, clock circuit, frequency divider, controllable silicon promote circuit, ultrasound emission circuit, receive amplifying circuit, detector amplifier, counter switch, counter, demonstration with door, display switch, numerical value and door, warning circuit, warning gate, edge taking-up circuit, add lightning road and demonstration comparer etc. and form.It is characterized in that: the utility model adopts light emitting diode linear array variable speed scanning display defect position and with different acoustic alarm indication flaw echo amplitude.
2, portable supersonic defectoscope as claimed in claim 1 is characterized in that the light emitting diode draw up in line, and there is the control with changed scale centimeter scale of corresponding ultrasonic shear waves and compressional wave sound path in steel both sides.
3, portable supersonic defectoscope as claimed in claim 1 is characterized in that warning circuit has adopted the echo amplitude comparer of being made up of the MOS door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88214949 CN2038239U (en) | 1988-10-17 | 1988-10-17 | Portable ultrasonic flaw detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88214949 CN2038239U (en) | 1988-10-17 | 1988-10-17 | Portable ultrasonic flaw detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2038239U true CN2038239U (en) | 1989-05-24 |
Family
ID=4847820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88214949 Withdrawn CN2038239U (en) | 1988-10-17 | 1988-10-17 | Portable ultrasonic flaw detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2038239U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8531329B2 (en) | 2004-06-30 | 2013-09-10 | Robert Bosch Gmbh | Method and device for determining the thickness of material using high frequency |
-
1988
- 1988-10-17 CN CN 88214949 patent/CN2038239U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8531329B2 (en) | 2004-06-30 | 2013-09-10 | Robert Bosch Gmbh | Method and device for determining the thickness of material using high frequency |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |