CN104569153A - Ship pool experiment system based on PCCP failure early-warning and monitoring signals - Google Patents
Ship pool experiment system based on PCCP failure early-warning and monitoring signals Download PDFInfo
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- CN104569153A CN104569153A CN201410847804.5A CN201410847804A CN104569153A CN 104569153 A CN104569153 A CN 104569153A CN 201410847804 A CN201410847804 A CN 201410847804A CN 104569153 A CN104569153 A CN 104569153A
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Abstract
A ship pool experiment system based on PCCP failure early-warning and monitoring signals comprises an underwater loudspeaker, a power amplifier, a sound source player, a hydrophone, an audio acquisition card, an acquisition computer and a power supply, wherein the underwater loudspeaker is an audio player mounted underwater in a ship pool, and is connected with the sound source player through the power amplifier; the sound source player is an audio signal player; the power amplifier is an audio amplifier and is used for providing sufficient power for the underwater loudspeaker; the hydrophone is an underwater-signal acquisition device mounted underwater in the ship pool and is connected with the acquisition computer through the audio acquisition card; the power supply is a power supply of the hydrophone and is connected with the hydrophone. The ship pool experiment system based on PCCP failure early-warning and monitoring signals has the advantages of reasonable structural design, convenience in use, high applicability and the like, and can provide an experiment support for later long-distance propagation of broken wires signals in a PCCP.
Description
Technical field
The invention belongs to PCCP road early warning and monitoring technical field, particularly relate to a kind of basin experimental system of Based PC CP pipeline exploding early warning monitor signal.
Background technique
The production of Prestressed concrete cylinder pipe and PCCP and use have very long history.To design the earliest and what manufacture Prestressed concrete cylinder pipe is French Bang Na pipeline company.To the forties in 20th century, American-European countries also starts numerous and confused exploitation and manufactures Prestressed concrete cylinder pipe.The U.S. produces as Prestressed concrete cylinder pipe maximum in the world and uses country, and the length to the modern Prestressed concrete cylinder pipe pipeline used reaches 28000KM, and wherein maximum Prestressed concrete cylinder pipe road diameter reaches 7.6 meters.
The main method of traditional Prestressed concrete cylinder pipe protection is hand inspection, as listening methods and eye-observation method.Prestressed concrete cylinder pipe faut detection also have far-field eddy/transformer coupled (RFEC/TC), based on the method such as Acoustic detection harmony fiber laser arrays (AFO) of hydrophorce.RFEC/TC method needs the water in emptying pipe before detection, therefore can consume a large amount of man power and materials.In addition, RFEC/TC method is a kind of off-line check method, and efficiency is lower.The fine detection method of acousto-optic is a kind of real-time detection method of high accuracy, but the method cost is high, and is difficult in in-service Prestressed concrete cylinder pipe road install acousto-optic fibre again, can only be applied to newly-built pipeline.Because hydrophorce is highly sensitive to detection acoustic signal, and only need in pipeline, lay a hydrophorce at a certain distance, so not only testing precision is high but also easy for installation based on the detecting method of hydrophorce.The method has obvious advantage relative to other several detecting methods, and in Prestressed concrete cylinder pipe road, damaged context of detection has application prospect very widely.
Summary of the invention
In order to solve the problem, the object of the present invention is to provide a kind of basin experimental system of Based PC CP pipeline exploding early warning monitor signal.
In order to achieve the above object, the basin experimental system of Based PC CP pipeline exploding early warning monitor signal provided by the invention comprises: pallesthesiometer, power amplifier, sound source player, hydrophorce, audio collection card, collecting computer and power supply; Wherein: pallesthesiometer is the audio playing apparatus be arranged in basin under the water surface, and it is connected with sound source player by power amplifier; Sound source player is audio signal playing device, for generating the acoustic signal of experiment; Power amplifier is Audio Frequency Amplifier, for providing enough power for pallesthesiometer; Hydrophorce is the collecting device of the underwater signal be arranged in basin under the water surface, and it is connected with collecting computer by audio collection card, and power supply is the power supply of hydrophorce, and it is connected with hydrophorce.
The JX00A type pallesthesiometer that described pallesthesiometer selects Jinhua, Zhejiang sky positron Co., Ltd to produce, this loudspeaker is made up of the cylinder of two diameter * height 87mm, and weight is 1.6 kilograms, sound source number 3, and Sounnd source direction number is 2.
Described sound source player adopts a computer with sound card.
Described audio collection card is usb audio capture card, and it is connected with collecting computer by USB interface.
The advantages such as basin experimental system adopts reasonable in design, easy to use, applicability is strong of Based PC CP pipeline exploding early warning monitor signal provided by the invention, can provide experiment support for later stage fracture of wire acoustic signal long propagation in PCCP.
Accompanying drawing explanation
Fig. 1 is the structural representation of the basin experimental system of Based PC CP pipeline exploding early warning monitor signal provided by the invention.
Fig. 2 is the fracture of wire waveform after original fracture of wire acoustic signal waveform and filtering.
Fig. 3 is fracture of wire acoustic signal propagation decay curve figure.
Embodiment
Be described in detail below in conjunction with the basin experimental system of the drawings and specific embodiments to Based PC CP pipeline exploding early warning monitor signal provided by the invention.
For the situation of prior art, the present inventor is after having made a large amount of early-stage Study to PCCP, propose the PCCP yarn break inspect system based on hydrophorce, its principle detects the acoustic signal real-time online in PCCP road, identify local flaw signal wherein, utilize local flaw signal to realize the early warning of PCCP road booster; Monitor and identify local flaw signal, just first must rest in propagating characteristic and the rule of acoustic signal in PCCP road, although the environment of basin is different with the PCCP road environment of reality, but basin also has certain representativeness, in basin experiment, mainly for following two schemes, the first, the decay curve of fracture of wire acoustic signal in basin of measure analog; The second, the propagation attenuation curve of single-frequency sound signal in basin of measure analog.
As shown in Figure 1, the basin experimental system of Based PC CP pipeline exploding early warning monitor signal provided by the invention comprises: pallesthesiometer 1, power amplifier 2, sound source player 3, hydrophorce 4, audio collection card 5, collecting computer 6 and power supply 7; Wherein: pallesthesiometer 1 is for being arranged on the audio playing apparatus in basin under the water surface 8, and it is connected with sound source player 3 by power amplifier 2; Sound source player 3 is audio signal playing device, for generating the acoustic signal of experiment; Power amplifier 2 is Audio Frequency Amplifier, for providing enough power for pallesthesiometer 1; Hydrophorce 4 is for being arranged on the collecting device of the underwater signal in basin under the water surface 8, and it is connected with collecting computer 6 by audio collection card 5, and power supply 7 is the power supply of hydrophorce 4, and it is connected with hydrophorce 4;
Pallesthesiometer 1, power amplifier 2 and sound source player 3 is the transmitting portion of acoustic signal, and hydrophorce 4, audio collection card 5, collecting computer 6 and power supply 7 is the receiving part of acoustic signal;
The transmission of acoustic signal realizes mainly through power amplifier 2 and pallesthesiometer 1, and the collection of acoustic signal is mainly realized by audio collection card 5;
The JX00A type pallesthesiometer that described pallesthesiometer 1 selects Jinhua, Zhejiang sky positron Co., Ltd to produce, this loudspeaker is made up of the cylinder of two diameter * height 87mm, and weight is 1.6 kilograms, sound source number 3, and Sounnd source direction number is 2.
Described sound source player 3 adopts a computer with sound card.
Described audio collection card 5 is usb audio capture card, and it is connected with collecting computer 6 by USB interface.
The experimental result of the basin experimental system of Based PC CP pipeline exploding early warning monitor signal provided by the invention:
First play fracture of wire acoustic signal with pallesthesiometer 1 in experiment, and measure fracture of wire acoustic signal at the diverse location of basin, original fracture of wire acoustic signal time-domain diagram and frequency domain figure are as shown in Figure 2;
As we can see from the figure, the working lipe of the true fracture of wire acoustic signal of PCCP is very short, only has about 200 milliseconds.
Table 1 reflects the result that fracture of wire acoustic signal is propagated in basin, as can be seen from Table 1, although fracture of wire acoustic signal is propagated after 100 meters in basin, signal amplitude has and decays largely, and fracture of wire acoustic signal relative to other sound signal still clearly.
The result that table 1 fracture of wire acoustic signal is propagated in basin
Fig. 3 is fracture of wire acoustic signal propagation decay curve figure, acoustic signal propagation decay curve explanation as shown in Figure 3, first acoustic signal is all have very large decay within the scope of the initial 10-20 rice propagated, although also have decay in the scope of 20 meters to 100 meters, the amplitude of its decay is smaller.
The result of basin experiment shows, fracture of wire acoustic signal is after propagation 100 meters, although the amplitude of acoustic signal has larger decay, the signal to noise ratio of fracture of wire acoustic signal still clearly, therefore for later stage fracture of wire acoustic signal long propagation in PCCP provides experiment support.
Claims (4)
1. a basin experimental system for Based PC CP pipeline exploding early warning monitor signal, is characterized in that: the basin experimental system of described Based PC CP pipeline exploding early warning monitor signal comprises:
Pallesthesiometer (1), power amplifier (2), sound source player (3), hydrophorce (4), audio collection card (5), collecting computer (6) and power supply (7); Wherein: pallesthesiometer (1) is for being arranged on the audio playing apparatus under the water surface in basin (8), and it is connected with sound source player (3) by power amplifier (2); Sound source player (3) is audio signal playing device, for generating the acoustic signal of experiment; Power amplifier (2) is Audio Frequency Amplifier, for providing enough power for pallesthesiometer (1); Hydrophorce (4) is for being arranged on the collecting device of the underwater signal under the water surface in basin (8), it is connected with collecting computer (6) by audio collection card (5), the power supply that power supply (7) is hydrophorce (4), it is connected with hydrophorce (4).
2. the basin experimental system of Based PC CP pipeline exploding early warning monitor signal according to claim 1, it is characterized in that: the JX00A type pallesthesiometer that described pallesthesiometer (1) selects Jinhua, Zhejiang sky positron Co., Ltd to produce, this loudspeaker is made up of the cylinder of two diameter * height 87mm, weight is 1.6 kilograms, sound source number 3, Sounnd source direction number is 2.
3. the basin experimental system of Based PC CP pipeline exploding early warning monitor signal according to claim 1, is characterized in that: described sound source player (3) adopts a computer with sound card.
4. the basin experimental system of Based PC CP pipeline exploding early warning monitor signal according to claim 1, it is characterized in that: described audio collection card (5) is usb audio capture card, and it is connected with collecting computer (6) by USB interface.
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| CN201410847804.5A CN104569153A (en) | 2014-12-31 | 2014-12-31 | Ship pool experiment system based on PCCP failure early-warning and monitoring signals |
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| CN201410847804.5A CN104569153A (en) | 2014-12-31 | 2014-12-31 | Ship pool experiment system based on PCCP failure early-warning and monitoring signals |
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Cited By (3)
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| CN106646435A (en) * | 2017-01-25 | 2017-05-10 | 大连理工大学 | Underwater sound source system for experiment teaching |
| CN107218518A (en) * | 2017-04-17 | 2017-09-29 | 昆明理工大学 | A kind of detection method of detection means for drain line blockage failure |
| CN107355686A (en) * | 2017-06-09 | 2017-11-17 | 昆明理工大学 | A kind of detection method of drain line blockage failure |
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| CN107355686B (en) * | 2017-06-09 | 2019-04-09 | 昆明理工大学 | A kind of detection method of drain line blockage failure |
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