CN2842393Y - Material internal-stress supersonic measuring device - Google Patents
Material internal-stress supersonic measuring device Download PDFInfo
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- CN2842393Y CN2842393Y CN 200520043899 CN200520043899U CN2842393Y CN 2842393 Y CN2842393 Y CN 2842393Y CN 200520043899 CN200520043899 CN 200520043899 CN 200520043899 U CN200520043899 U CN 200520043899U CN 2842393 Y CN2842393 Y CN 2842393Y
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Abstract
The utility model relates to a material internal-stress measuring device, particularly a material internal-stress supersonic measuring device. A supersonic transmission transducer (4) and a supersonic receiving transducer (5) of the utility model are arranged on the surface of a tested member. The utility model is characterized in that the measuring device also comprises a microcomputer (1), a high speed data collection card (2), a data collection triggering circuit (6), a pulse transmission circuit (3) and a supersonic signal amplification circuit (7), wherein the output of the pulse transmission circuit is connected with the supersonic transmission transducer, and meanwhile, is connected with an input end of the data collecting triggering circuit; an output end of the data collecting triggering circuit is connected with the high speed data collection card; when the supersonic receiving transducer receives supersonic signals flowing through the fixed range of the tested member, the output of the supersonic receiving transducer is connected with the supersonic signal amplification circuit and then is connected with the high speed data collection card; the output of the high speed data collection card is connected with a computer. After the computer calculates the time difference of the signal propagation of input supersonic, the material internal stress can be calculated. The utility model has the advantages of simpleness, availability and higher testing precision.
Description
(1) technical field
The utility model relates to material internal stress measuring device, relates in particular to material internal stress ultrasonic measuring device.
(2) background technology
The material internal stress is very big for the performance impact of mechanical component, for some critical component (as roll), internal stress can be described as a kind of invisible defective that has its inside, directly affect its duty, serviceable life and security performance, therefore, the internal stress that detects accurately and reliably and easily in the mechanical component just seems particularly important.
The measuring method of internal stress can be divided into and diminishes and can't harm two big classes, diminishes method of testing and also is stress free method, belongs to the method for machinery; Non-destructive testing method belongs to the method for physics, can not produce damage to testee.Physical measurement mainly comprises lossless detection methods such as X-ray diffraction method, method of magnetic, supercritical ultrasonics technology.
Ultrasonic Method for Measuring is to utilize the acoustoelectric effect of material, the internal stress that promptly is applied on the material changes the variation that causes ultrasonic propagation velocity, the size that changes depends on hyperacoustic wave mode, the direction of propagation, material structure and stress state etc., draws stress distribution by the variation of velocity of propagation in member of accurate mensuration ultrasound wave.
Jap.P. JP57088333A discloses a kind of stress distribution pick-up unit, this pick-up unit comprises: be mounted respectively ultrasonic emitting crystal oscillator and a ultrasound wave that is installed on the wedge of having nothing in common with each other in two transmission frequencies on the sound wedge material and receive crystal oscillator, the sound wedge of ultrasonic emitting crystal oscillator when being detected, object will be installed, be installed in the diverse location place on testee surface respectively, and sound wedge that ultrasound wave receives crystal oscillator will be housed be placed on assigned address on the object.Because the position of hyperacoustic point of crossing of different frequency is subjected to the material acoustics Effect on Performance, when be difficult to guaranteeing each the measurement with ultrasound wave reception crystal oscillator between distance remain unchanged, and the ultrasound wave of different frequency is because the sonic velocity change difference that stress causes is very little, therefore, the measurement accuracy of this method is affected.
Chinese patent 02154474.3 discloses a kind of ultrasonic bolt fastening force proving installation, and it comprises: be installed in compressional wave transducer, the shear wave transducer of bolt end face respectively, and ultrasonic transmit circuit, ultrasound wave receiving circuit, amplifier; Be installed in displacement transducer, thickness measuring circuit, the central processing unit of clamped workpiece both ends of the surface; Be installed in temperature sensor, temperature measurement circuit, the central processing unit of nut end face; Master oscillator, the time main pulse circuit, be used for the read only memory ROM of storage medium coefficient etc.It adopts the acoustic elasticity principle, determine the fastening force of bolt by measuring ultrasound wave velocity of propagation in bolt, because bolt arrangement is simple, and has only axial tension, therefore the fastening force that utilizes ultrasonic technology to detect bolt is relatively easily realized, but this apparatus structure is comparatively complicated, and can only be used for the axial stress Non-Destructive Testing of high-strength bolt on the steel construction, and material planted agent force measurement is difficult to realize.
(3) summary of the invention
The purpose of this utility model is to provide a kind of material internal stress ultrasonic measuring device, and this measurement mechanism does not cause damage by Ultrasonic Nondestructive to test specimen, simple, the easy row of proving installation, and measuring accuracy is higher.
The utility model is achieved in that a kind of material internal stress ultrasonic measuring device, comprise ultrasound transmitting transducer and ultrasound wave receiving transducer, ultrasound transmitting transducer and ultrasound wave receiving transducer place the test specimen surface, it is characterized in that described measurement mechanism also comprises microcomputer, high-speed data acquisition card, the data acquisition trigger circuit, the pulse radiating circuit, the ultrasonic signal amplifying circuit, the output of pulse radiating circuit connects ultrasound transmitting transducer, the pulse radiating circuit is exported simultaneously and is connect data acquisition trigger circuit input end, data acquisition trigger circuit output termination high-speed data acquisition card, after the ultrasound wave receiving transducer receives the ultrasonic signal that flows through the test specimen fixed range that sends from ultrasound transmitting transducer, output connects the ultrasonic signal amplifying circuit, the output of ultrasonic signal amplifying circuit connects high-speed data acquisition card, output connect computing machine after high-speed data acquisition card received the ultrasonic signal of the ultrasound wave basis signal of data acquisition trigger circuit output and the output of ultrasonic signal amplifying circuit, behind the ultrasonic signal travel-time difference operation of machine to input, calculate the material internal stress as calculated.
Above-mentioned material internal stress ultrasonic measuring device, described pulse radiating circuit is made up of an external quartz oscillator of 7 binary string linage-counters and a resistor 15, its output connects a capacitor 16 and the differentiating circuit that resistor 17 is formed, differentiating circuit output connects a SCR control utmost point and positive pole, controllable silicon negative pole and connects a resistor 19 and a capacitor 20, another termination operating voltage of resistor 19, ultrasonic emitting pulse of capacitor 20 other ends output.
Above-mentioned material internal stress ultrasonic measuring device, described data acquisition trigger circuit are made up of two capacitors 8,11, two resistors 9,10 and stabilivolt, capacitor 8, two resistors 9,10 and capacitor 11 are connected into series circuit, and stabilivolt is attempted by the centre of series circuit.
Above-mentioned material internal stress ultrasonic measuring device, described ultrasonic signal amplifying circuit is made up of third stage amplifier, the third stage amplifier circuit is identical, first order amplifier circuit is by operational amplifier 21, coupling condenser 22 and resistor 23,24,25 form, signal connects coupling condenser 22 backs and inserts operational amplifier 21 positive input terminals, resistor 23 1 termination operational amplifiers 21 positive input terminals, another termination earthing pole, resistor 24 1 termination operational amplifiers 21 negative input ends, another termination earthing pole, operational amplifier 21 output terminals and negative input end series resistor device 25, operational amplifier 31 outputs of the third level connect coupling condenser 36 back output signals.
The utility model using ultrasound ripple can see through the physical principle that solid is propagated, more accurately measure ultrasound wave by ultrasound transmitting transducer and ultrasound wave receiving transducer and propagate the used time of fixed range at tested material internal, by the mutual relationship between this travel-time and the material internal stress, as calculated after the machine computing, and then calculate the size of material internal stress.The utility model does not cause damage to test specimen, comparatively simple, the easy row of proving installation, and measuring accuracy is higher.
(4) description of drawings
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is the utility model material internal stress ultrasonic measuring device block scheme;
Fig. 2 is the circuit diagram of data acquisition trigger circuit;
Fig. 3 is the circuit diagram of pulse radiating circuit;
Fig. 4 is the circuit diagram of ultrasonic signal amplifying circuit.
(5) embodiment
Referring to Fig. 1, a kind of material internal stress ultrasonic measuring device comprises ultrasound transmitting transducer 4 and ultrasound wave receiving transducer 5.Ultrasound transmitting transducer 4 and ultrasound wave receiving transducer 5 place the surface of test specimen, pulse radiating circuit 3 sends ultrasound wave by ultrasound transmitting transducer 4 to the test specimen material, ultrasound wave is received by ultrasound wave receiving transducer 5 after the test specimen material internal is propagated one section fixing distance.Ultrasonic signal amplifying circuit 7 is sent to microcomputer 1 by high-speed data acquisition card 2 after faint ultrasonic signal is amplified.The input end of data acquisition trigger circuit 6 links to each other with pulse radiating circuit 3, and its output terminal links to each other with high-speed data acquisition card 2, thereby has guaranteed the data sync unanimity that collects.Microcomputer 1 is according to the travel-time of ultrasound wave in test specimen material fixed range, and then calculates the size of this material internal stress.
Referring to Fig. 2, data acquisition trigger circuit 6 are formed a series circuit by 8,11 and two resistors 9,10 of two capacitors, and stabilivolt 12 is attempted by the centre of this series circuit.The effect of capacitor 8,11 is isolated DCs, and the effect of resistor 9,10 is restriction electric currents, and the effect of stabilivolt 12 is the synchronous triggering pulses that the step-down of high pressure transponder pulse become low pressure.
Referring to Fig. 3, pulse radiating circuit 3 is made up of 7 binary string linage-counters 13 external quartz oscillators 14 and a resistor 15.The frequency of quartz oscillator 14 is 32768Hz, behind 7 scale-of-two frequency divisions, produces the square-wave signal of a 512Hz, and this square-wave signal is added on the differentiating circuit of a capacitor 16 and resistor 17 compositions, produces a differentiated pulse.Differentiated pulse is by controllable silicon 18, a resistor 19 and a ultrasonic emitting pulse of capacitor 20 back outputs.
Referring to Fig. 4, ultrasonic signal amplifying circuit 7 is made up of third stage amplifier, and the third stage amplifier circuit is identical.First order amplifier is made up of operational amplifier 21, coupling condenser 22 and resistor 23,24,25; Second level amplifier is made up of operational amplifier 26, coupling condenser 27 and resistor 28,29,30; Third level amplifier is made up of operational amplifier 31, coupling condenser 32,36 and resistor 33,34,35.The power supply that operational amplifier adopted is ± 12V.
Component parameter in the present embodiment is:
Ultrasound transmitting transducer 4 is made up of 1 piezoelectric crystal, and resonance frequency is 1MHz;
Ultrasound wave receiving transducer 5 is made up of 2 piezoelectric crystals, and resonance frequency is 1MHz, adopts distance to be connected and fixed for two rectangular bars of metal of L between two piezoelectric crystals;
High-speed data acquisition card 2 adopts the American National NI5112 of instrument company type data collecting card, and its frequency acquisition is 100MS/s, and bus mode is PCI, and port number is 2, and each passage buffer storage is 16MB, and resolution is 8;
Data acquisition trigger circuit 6 are made up of the stabilivolt 12 of 9,10 and 1W5V of resistor of 8,11, two 3W1K of capacitor of two 2KV2000P;
Pulse radiating circuit 3 adopts 7 binary string linage-counter/frequency dividers 13, the quartz (controlled) oscillator 14 of an external 32768Hz and the resistor 15 of a 1M Ω, therefrom draw the square-wave signal of a 512Hz, be added on the differentiating circuit of being made up of the resistor 17 of the coupling capacitance 16 of a 63V2000P and a 1/2W1K Ω, differentiated pulse produces a ultrasonic emitting pulse by the capacitor 20 of a controllable silicon 18 and 1W200K Ω resistor 19, a 2KV2000P;
Ultrasonic signal amplifying circuit 7 is made up of third stage amplifier.First order amplifier is made up of LF357 operational amplifier 21,63V2200P coupling capacitance 22 and 1/2W1K Ω resistor 23,1/2W1K Ω resistor 24,1/2W10K Ω resistor 25; Second level amplifier is made up of LF357 operational amplifier 26,63V2200P coupling capacitance 27 and 1/2W1K Ω resistor 28,1/2W1K Ω resistor 29,1/2W10K Ω resistor 30; Third level amplifier is made up of LF357 operational amplifier 31,63V2200P coupling condenser 32,63V2200P coupling condenser 36 and 1/2W1K Ω resistor 33,1/2W1K Ω resistor 34,1/2W10K Ω resistor 35.The power supply that operational amplifier 21,26,31 is adopted is ± 12V.
The utility model ultrasonic measuring device, stress intensity that can the nondestructive measurement roll material, and then for prediction with foundation is provided in serviceable life of prolonging roll.
Claims (4)
1. material internal stress ultrasonic measuring device, comprise ultrasound transmitting transducer (4) and ultrasound wave receiving transducer (5), ultrasound transmitting transducer (4) and ultrasound wave receiving transducer (5) place the test specimen surface, it is characterized in that described measurement mechanism also comprises microcomputer (1), high-speed data acquisition card (2), data acquisition trigger circuit (6), pulse radiating circuit (3), ultrasonic signal amplifying circuit (7), pulse radiating circuit (3) output connects ultrasound transmitting transducer (4), pulse radiating circuit (3) is exported simultaneously and is connect data acquisition trigger circuit (6) input end, data acquisition trigger circuit (6) output termination high-speed data acquisition card (2), after ultrasound wave receiving transducer (5) receives the ultrasonic signal that flows through the test specimen fixed range that sends from ultrasound transmitting transducer (4), output connects ultrasonic signal amplifying circuit (7), ultrasonic signal amplifying circuit (7) output connects high-speed data acquisition card (2), output connect computing machine (1) after high-speed data acquisition card (2) received the ultrasonic signal of the ultrasound wave basis signal of data acquisition trigger circuit (6) output and ultrasonic signal amplifying circuit (7) output, behind the ultrasonic signal travel-time difference operation of machine (1) to input, calculate the material internal stress as calculated.
2. material internal stress ultrasonic measuring device according to claim 1, it is characterized in that pulse radiating circuit (3) is made up of external quartz oscillators of one 7 binary string linage-counters (13) (14) and a resistor (15), its output connects the differentiating circuit of a capacitor (16) and a resistor (17) composition, differentiating circuit output connects a controllable silicon (18) the control utmost point and positive pole, controllable silicon (18) negative pole also connects a resistor (19) and a capacitor (20), another termination operating voltage of resistor (19), ultrasonic emitting pulse of capacitor (20) other end output.
3. material internal stress ultrasonic measuring device according to claim 1, it is characterized in that data acquisition trigger circuit (6) are by two capacitors (8,11), two resistors (9,10) and stabilivolt (12) form, capacitor (8), two resistors (9,10) and capacitor (11) are connected into series circuit, and stabilivolt (12) is attempted by the centre of series circuit.
4. material internal stress ultrasonic measuring device according to claim 1, it is characterized in that ultrasonic signal amplifying circuit (7) is made up of third stage amplifier, the third stage amplifier circuit is identical, first order amplifier circuit is by operational amplifier (21), coupling condenser (22) and resistor (23) (24) (25) are formed, signal connects coupling condenser (22) back and inserts operational amplifier (21) positive input terminal, resistor (23) one termination operational amplifier (21) positive input terminals, another termination earthing pole, resistor (24) one termination operational amplifier (21) negative input ends, another termination earthing pole, operational amplifier (21) output terminal and negative input end series resistor device (25), the operational amplifier of the third level (31) output connect coupling condenser (36) back output signal.
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| CN 200520043899 CN2842393Y (en) | 2005-07-29 | 2005-07-29 | Material internal-stress supersonic measuring device |
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| CN 200520043899 CN2842393Y (en) | 2005-07-29 | 2005-07-29 | Material internal-stress supersonic measuring device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957343A (en) * | 2010-09-29 | 2011-01-26 | 中国瑞林工程技术有限公司 | Novel acoustic-emission ground-stress-field measuring technology based on plane stress condition |
| CN102590355A (en) * | 2012-01-16 | 2012-07-18 | 北京理工大学 | Pulse ultrasonic flaw detector property measuring system |
| CN102680571A (en) * | 2012-05-23 | 2012-09-19 | 北京理工大学 | Flaw detector blocking time measuring device |
| CN102967397A (en) * | 2012-11-19 | 2013-03-13 | 辽宁省电力有限公司电力科学研究院 | Device and method for measuring residual stress of welding seam of welding structure by ultrasonic waves |
| CN103017951A (en) * | 2011-09-22 | 2013-04-03 | 北京理工大学 | Flat slab stress field test device |
| CN104142195A (en) * | 2014-04-30 | 2014-11-12 | 李祚华 | Device and method for detecting interior initial stress of steel structural member based on ultrasonic method |
| CN104614106A (en) * | 2015-01-27 | 2015-05-13 | 北京泰瑞博创科技有限公司 | High-speed railway stress testing device |
| CN105115652A (en) * | 2015-07-09 | 2015-12-02 | 西北工业大学 | Method for quantified monitoring bolt pre-tightening torque through active ultrasonic guided wave |
| CN107702831A (en) * | 2017-08-31 | 2018-02-16 | 北京金风慧能技术有限公司 | Work status detection method and device |
| CN111811707A (en) * | 2020-07-23 | 2020-10-23 | 北京理工大学 | Rotating member ultrasonic testing device and method based on magnetic fluid coupling |
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2005
- 2005-07-29 CN CN 200520043899 patent/CN2842393Y/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957343B (en) * | 2010-09-29 | 2013-08-21 | 中国瑞林工程技术有限公司 | Novel acoustic-emission ground-stress-field measuring technology based on plane stress condition |
| CN101957343A (en) * | 2010-09-29 | 2011-01-26 | 中国瑞林工程技术有限公司 | Novel acoustic-emission ground-stress-field measuring technology based on plane stress condition |
| CN103017951B (en) * | 2011-09-22 | 2015-08-05 | 北京理工大学 | A kind of dull and stereotyped stress field device |
| CN103017951A (en) * | 2011-09-22 | 2013-04-03 | 北京理工大学 | Flat slab stress field test device |
| CN102590355A (en) * | 2012-01-16 | 2012-07-18 | 北京理工大学 | Pulse ultrasonic flaw detector property measuring system |
| CN102680571A (en) * | 2012-05-23 | 2012-09-19 | 北京理工大学 | Flaw detector blocking time measuring device |
| CN102967397A (en) * | 2012-11-19 | 2013-03-13 | 辽宁省电力有限公司电力科学研究院 | Device and method for measuring residual stress of welding seam of welding structure by ultrasonic waves |
| CN104142195A (en) * | 2014-04-30 | 2014-11-12 | 李祚华 | Device and method for detecting interior initial stress of steel structural member based on ultrasonic method |
| CN104614106A (en) * | 2015-01-27 | 2015-05-13 | 北京泰瑞博创科技有限公司 | High-speed railway stress testing device |
| CN104614106B (en) * | 2015-01-27 | 2018-03-06 | 北京泰瑞博创科技有限公司 | High-speed railway rail stress detection device |
| CN105115652A (en) * | 2015-07-09 | 2015-12-02 | 西北工业大学 | Method for quantified monitoring bolt pre-tightening torque through active ultrasonic guided wave |
| CN107702831A (en) * | 2017-08-31 | 2018-02-16 | 北京金风慧能技术有限公司 | Work status detection method and device |
| CN111811707A (en) * | 2020-07-23 | 2020-10-23 | 北京理工大学 | Rotating member ultrasonic testing device and method based on magnetic fluid coupling |
| US11680858B2 (en) | 2020-07-23 | 2023-06-20 | Bejing Institute Of Technology | Device and method for ultrasonic detecting of rotating member based on magnetic fluid coupling |
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