CN104749558A - Acoustic emission based positioning method for debris cloud impact source - Google Patents
Acoustic emission based positioning method for debris cloud impact source Download PDFInfo
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- CN104749558A CN104749558A CN201310746820.0A CN201310746820A CN104749558A CN 104749558 A CN104749558 A CN 104749558A CN 201310746820 A CN201310746820 A CN 201310746820A CN 104749558 A CN104749558 A CN 104749558A
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- acoustic emission
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/18—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using ultrasonic, sonic, or infrasonic waves
- G01S5/22—Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The invention belongs to the technical field of positioning of impact debris, specifically relates to an acoustic emission based positioning method for a debris cloud impact source, and aims at providing a method for positioning the debris cloud impact source based on acoustic emission. The method comprises the steps of measuring acoustic emission wave speed in a target plate; acquiring debris cloud impact acoustic emission signal; calculating positioning time difference of a sensor array; calculating the debris cloud impact source positioning result. According to the method, the steps of measuring acoustic emission wave speed in the target plate, acquiring debris cloud impact acoustic emission signal, calculating positioning time difference of a sensor array and calculating the debris cloud impact source positioning result are carried out, so that the debris cloud impact source can be positioned based on the acoustic emission.
Description
Technical field
The invention belongs to and clash into fragment field of locating technology, be specifically related to a kind of panus based on acoustic emission and clash into source electricity method.
Background technology
Along with being on the increase of mankind's space operation, space debris environment becomes more complicated, and the threat that space junk produces spacecraft is more and more severeer.For the problem that reply space junk produces, researchist develops many lift-launch and the real time monitoring of spacecraft based on different technologies, and have studied the cognitive method according to acoustic emission.Usual people by installing protecting screen to reach the object of protection spacecraft on outer wall, but also can bring other problems.Panus can be produced after impact from space debris safeguard structure, by continuing flight after protecting screen until impinge upon on the body of cabin, the breakage of cabin body directly can threaten the safe operation of aircraft, life-span and safety, therefore needs the Debris Clouds based on acoustic emission to clash into source electricity report.At present, the Debris Clouds based on acoustic emission is not yet had to clash into the report of source electricity method.
Summary of the invention
Object of the present invention provides a kind of can carry out based on acoustic emission the shock of the panus based on the acoustic emission source electricity method that Debris Clouds clashes into source electricity.
The present invention is achieved in that
Panus based on acoustic emission clashes into a source electricity method, comprises the steps:
The first step: measure the acoustic emission velocity of wave in target plate;
Second step: obtain panus strike note and transmit;
3rd step: the calculating sensor array location time difference;
4th step: calculate panus and clash into source electricity result.
Acoustic emission wave trot in measurement target plate as above is rapid, the sensor gathering the acoustic emission signal that panus shock produces is fixed on target plate with certain rectilineal interval by couplant, the velocity of propagation of the S0 mode in signal is obtained, velocity of wave propagation when locating using this speed as panus by disconnected lead test or shooting test.
Acoustic emission wave trot in measurement target plate as above is rapid, and described rectilineal interval is 100mm.
Acquisition panus strike note as above transmits step, is fixed on target plate by acoustic emission signal sensor with certain matrix arrangement by grip device; When panus strikes on target plate, in target plate, produce acoustic emission fluctuation, sensor gathers panus strike note and transmits.
Acquisition panus strike note as above transmits step, described sensor arrangement, specifically refer to that first and second in four acoustic emission signal sensors is vertically placed, the spacing of two acoustic emission signal sensor geometric centers is 400mm, 3rd and the 4th acoustic emission signal sensor are placed in the horizontal direction, and the spacing of two acoustic emission signal sensor geometric centers is 300mm; The center of first and second acoustic emission signal sensor V182 geometric center line overlaps with the center of first and second acoustic emission signal sensor V182 geometric center line.
Calculating sensor array location as above time difference step, the panus strike note collected in second step is transmitted and processes, setting threshold value extracts acoustic emission corresponding to S0 mode and fluctuates time of arrival, and calculate the time difference of each sensor, clash into the location algorithm time difference used as panus.
Calculating panus as above clashes into source electricity result step, and the sensor array location time difference obtained in the acoustic emission velocity of wave first step obtained and the 3rd step, application is clashed into source electricity computational algorithm and calculated the position that panus clashes into the center of percussion of target plate.
Calculating panus as above clashes in source electricity result step, clashes into source electricity computational algorithm and selects threshold time difference method or wave front method.
The invention has the beneficial effects as follows:
The present invention adopts the acoustic emission velocity of wave in measurement target plate, acquisition panus strike note transmits, calculating sensor array locates the time difference and calculate panus clashes into source electricity result step, achieves and carries out Debris Clouds shock source electricity based on acoustic emission.
Accompanying drawing explanation
Fig. 1 is that a kind of panus based on acoustic emission of the present invention clashes into source electricity method flow diagram.
Embodiment
Clash into source electricity method below in conjunction with the drawings and specific embodiments to a kind of panus based on acoustic emission of the present invention to be specifically introduced:
As shown in Figure 1, a kind of panus based on acoustic emission clashes into source electricity method, comprises the steps:
The first step: measure the acoustic emission velocity of wave in target plate
The sensor V182 gathering the acoustic emission signal that panus shock produces is fixed on target plate with certain rectilineal interval by couplant, the velocity of propagation of the S0 mode in signal is obtained, velocity of wave propagation when locating using this speed as panus by disconnected lead test or shooting test.In the present embodiment, certain rectilineal interval is decided to be 100mm.Disconnected lead test or shooting test are prior art.A kind of measurement that V182 produces for Panametrics Inc. clashes into sensor used, is commercially available.S0 mode, for locating the source of time difference calculating, refers to the symmetrical mode in the first rank of Lamb wave.
Second step: obtain panus strike note and transmit
Acoustic emission signal sensor V182 is fixed on target plate by grip device with certain matrix arrangement.When panus strikes on target plate, in target plate, produce acoustic emission fluctuation, sensor gathers panus strike note and transmits.In the present embodiment, a kind of sensor arrangement is as follows: vertically place for first and second in four acoustic emission signal sensor V182, the spacing of two acoustic emission signal sensor V182 geometric centers is 400mm, 3rd and the 4th acoustic emission signal sensor V182 place in the horizontal direction, and the spacing of two acoustic emission signal sensor V182 geometric centers is 300mm.The center of first and second acoustic emission signal sensor V182 geometric center line overlaps with the center of first and second acoustic emission signal sensor V182 geometric center line.
3rd step: the calculating sensor array location time difference
The panus strike note collected in second step is transmitted and analyzes, set suitable threshold value, extract the acoustic emission fluctuation time of arrival that S0 mode is corresponding, and calculate the time difference of each sensor, clash into the location algorithm time difference used as panus.What set that suitable threshold value refers to that this threshold value will ensure that the time difference calculates derives from same Lamb wave mode, i.e. the symmetrical S0 mode in the first rank of Lamb wave.The time difference that panus clashes into location algorithm used refers to that the moment of its excess-three sensor compares with it the time difference obtained so that in aforesaid four sensors, the sensor of due in is for benchmark at first.
4th step: calculate panus and clash into source electricity result
The sensor array location time difference obtained in the acoustic emission velocity of wave that the first step is obtained and the 3rd step, apply existing shock source electricity computational algorithm and can obtain the position that panus clashes into the center of percussion of target plate.In the present embodiment, clash into source electricity computational algorithm and can select existing threshold time difference method or wave front method excessively.
The present invention adopts the acoustic emission velocity of wave in measurement target plate, acquisition panus strike note transmits, calculating sensor array locates the time difference and calculate panus clashes into source electricity result step, achieves and carries out Debris Clouds shock source electricity based on acoustic emission.
Claims (8)
1. the panus based on acoustic emission clashes into a source electricity method, comprises the steps:
The first step: measure the acoustic emission velocity of wave in target plate;
Second step: obtain panus strike note and transmit;
3rd step: the calculating sensor array location time difference;
4th step: calculate panus and clash into source electricity result.
2. a kind of panus based on acoustic emission according to claim 1 clashes into source electricity method, it is characterized in that: the acoustic emission wave trot in described measurement target plate is rapid, the sensor gathering the acoustic emission signal that panus shock produces is fixed on target plate with certain rectilineal interval by couplant, the velocity of propagation of the S0 mode in signal is obtained, velocity of wave propagation when locating using this speed as panus by disconnected lead test or shooting test.
3. a kind of panus based on acoustic emission according to claim 1 clashes into source electricity method, it is characterized in that: the acoustic emission wave trot in described measurement target plate is rapid, and described rectilineal interval is 100mm.
4. a kind of panus based on acoustic emission according to claim 1 clashes into source electricity method, it is characterized in that: described acquisition panus strike note transmits step, is fixed on target plate by acoustic emission signal sensor with certain matrix arrangement by grip device; When panus strikes on target plate, in target plate, produce acoustic emission fluctuation, sensor gathers panus strike note and transmits.
5. a kind of panus based on acoustic emission according to claim 1 clashes into source electricity method, it is characterized in that: described acquisition panus strike note transmits step, described sensor arrangement, specifically refer to that first and second in four acoustic emission signal sensors is vertically placed, the spacing of two acoustic emission signal sensor geometric centers is 400mm, 3rd and the 4th acoustic emission signal sensor are placed in the horizontal direction, and the spacing of two acoustic emission signal sensor geometric centers is 300mm; The center of first and second acoustic emission signal sensor V182 geometric center line overlaps with the center of first and second acoustic emission signal sensor V182 geometric center line.
6. a kind of panus based on acoustic emission according to claim 1 clashes into source electricity method, it is characterized in that: described calculating sensor array location time difference step, the panus strike note collected in second step is transmitted and processes, setting threshold value extracts acoustic emission corresponding to S0 mode and fluctuates time of arrival, and calculate the time difference of each sensor, clash into the location algorithm time difference used as panus.
7. a kind of panus based on acoustic emission according to claim 1 clashes into source electricity method, it is characterized in that: described calculating panus clashes into source electricity result step, the sensor array location time difference obtained in the acoustic emission velocity of wave first step obtained and the 3rd step, application is clashed into source electricity computational algorithm and is calculated the position that panus clashes into the center of percussion of target plate.
8. a kind of panus based on acoustic emission according to claim 1 clashes into source electricity method, it is characterized in that: described calculating panus clashes in source electricity result step, clashes into source electricity computational algorithm and selects threshold time difference method or wave front method.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182290A (en) * | 2015-09-11 | 2015-12-23 | 兰州空间技术物理研究所 | Spacecraft micro meteor and space debris bump positioning method on-track verification device |
| CN106645406A (en) * | 2016-12-02 | 2017-05-10 | 北京空间飞行器总体设计部 | Positioning system and method of spacecraft subjected to space junk collision |
| CN111474244A (en) * | 2020-03-31 | 2020-07-31 | 天津大学 | Spacecraft stiffened flat plate self-adaptive threshold value cross-correlation positioning system and algorithm |
| CN111645886A (en) * | 2020-04-10 | 2020-09-11 | 北京空间飞行器总体设计部 | Method for monitoring space debris impact on special-shaped structure spacecraft sealed cabin |
| CN112082724A (en) * | 2020-09-09 | 2020-12-15 | 北京卫星环境工程研究所 | Spacecraft in-orbit space fragment collision multi-parameter detection system and detection method |
| CN113219411A (en) * | 2021-05-06 | 2021-08-06 | 哈尔滨工业大学 | Nondestructive equivalent sound source excitation method for simulating ultrahigh-speed impact sound emission of space debris |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182290A (en) * | 2015-09-11 | 2015-12-23 | 兰州空间技术物理研究所 | Spacecraft micro meteor and space debris bump positioning method on-track verification device |
| CN106645406A (en) * | 2016-12-02 | 2017-05-10 | 北京空间飞行器总体设计部 | Positioning system and method of spacecraft subjected to space junk collision |
| CN106645406B (en) * | 2016-12-02 | 2019-03-12 | 北京空间飞行器总体设计部 | The positioning system and localization method of a kind of spacecraft by impact from space debris |
| CN111474244A (en) * | 2020-03-31 | 2020-07-31 | 天津大学 | Spacecraft stiffened flat plate self-adaptive threshold value cross-correlation positioning system and algorithm |
| CN111645886A (en) * | 2020-04-10 | 2020-09-11 | 北京空间飞行器总体设计部 | Method for monitoring space debris impact on special-shaped structure spacecraft sealed cabin |
| CN111645886B (en) * | 2020-04-10 | 2021-07-13 | 北京空间飞行器总体设计部 | Method for monitoring space debris impact on special-shaped structure spacecraft sealed cabin |
| CN112082724A (en) * | 2020-09-09 | 2020-12-15 | 北京卫星环境工程研究所 | Spacecraft in-orbit space fragment collision multi-parameter detection system and detection method |
| CN113219411A (en) * | 2021-05-06 | 2021-08-06 | 哈尔滨工业大学 | Nondestructive equivalent sound source excitation method for simulating ultrahigh-speed impact sound emission of space debris |
| CN113219411B (en) * | 2021-05-06 | 2021-11-19 | 哈尔滨工业大学 | Nondestructive equivalent sound source excitation method for simulating ultrahigh-speed impact sound emission of space debris |
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Application publication date: 20150701 |