CN210090371U - Test system for stress wave in asphalt pavement - Google Patents
Test system for stress wave in asphalt pavement Download PDFInfo
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- CN210090371U CN210090371U CN201822123208.9U CN201822123208U CN210090371U CN 210090371 U CN210090371 U CN 210090371U CN 201822123208 U CN201822123208 U CN 201822123208U CN 210090371 U CN210090371 U CN 210090371U
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Abstract
The utility model belongs to the technical field of the detection of road engineering material, concretely relates to a test system for bituminous paving medium stress wave, including piezoelectricity intelligence aggregate, signal generator, signal amplifier and signal receiver, signal generator is connected with the piezoelectricity intelligence aggregate as the driver, and the piezoelectricity intelligence aggregate as the sensor is connected with signal amplifier, and signal amplifier is connected with signal receiver, and signal receiver receives the signal of telecommunication and shows the signal waveform on the display screen. The system is simple to operate, accurate and reliable, can accurately test the propagation mode of the stress wave in the asphalt mixture, and can obtain the characteristics of the asphalt mixture such as strength, porosity and internal defects by analyzing the propagation characteristics.
Description
Technical Field
The utility model belongs to the technical field of the detection of road engineering material, a test system for stress wave in bituminous paving is related to.
Background
The asphalt pavement is a high-grade pavement widely used in road construction, so the detection and maintenance of the pavement performance of the asphalt pavement are of great importance. At present, the common detection method is ultrasonic nondestructive detection and is widely applied to engineering. Ultrasonic waves are mechanical vibration waves excited in an elastic medium by a mechanical vibration source, which essentially transmits vibration energy in the form of stress waves. The ultrasonic waves are transmitted into the object to be transmitted, and characteristic parameters such as time, wave speed, amplitude, waveform and the like of the stress waves transmitted in the object can be analyzed through a machine. According to the parameters, the relationship between the stress wave and some performance parameters of the asphalt pavement, such as modulus, strength, void ratio and the like, is established, and the effect of direct test is achieved. The ultrasonic detection is a nondestructive detection method, has the advantages of easy excitation, simple detection, convenient operation, low price and the like, is widely applied in the field of civil engineering, accumulates relatively rich experience and mature detection methods, and is still applied in research and exploration stages in road engineering.
Most of domestic ultrasonic nondestructive testing researches are directed at cement concrete pavements, a standard system for ultrasonic testing of asphalt concrete pavements is not formed, and the ultrasonic technology is not well developed. Because the asphalt mixture is a viscoelastic material with a multiphase composite structure, different from a common homogeneous elastic medium, the physical state is difficult to accurately grasp, the attenuation coefficient of ultrasonic sound waves in the asphalt mixture is large, the propagation characteristic is complex, and great difficulty is caused for the stress wave detection of an asphalt pavement.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defect that above-mentioned prior art exists, the utility model aims to provide a test system for stress wave among bituminous paving, this system can accurately test the propagation mode of stress wave in bituminous mixture, simultaneously through characteristics such as intensity, porosity, internal defect of analysis propagation characteristic test bituminous mixture.
The utility model discloses a realize through following technical scheme:
a test system for stress waves in an asphalt pavement comprises a signal generator, a signal amplifier, a signal receiver, a first piezoelectric intelligent aggregate serving as a driver and a second piezoelectric intelligent aggregate serving as a sensor, wherein the first piezoelectric intelligent aggregate and the second piezoelectric intelligent aggregate are embedded in the asphalt pavement;
the signal generator is connected with the first piezoelectric intelligent aggregate, the second piezoelectric intelligent aggregate is connected with the signal amplifier, and the signal amplifier is connected with the signal receiver;
the signal generator is used for applying an external electrical excitation signal to the first piezoelectric intelligent aggregate, the signal amplifier is used for converting an electric signal output by the second piezoelectric intelligent aggregate into an amplified voltage signal, and the signal receiver is used for receiving the electric signal and displaying a signal waveform on the display screen.
Furthermore, the first piezoelectric intelligent aggregate and the second piezoelectric intelligent aggregate are wrapped with epoxy resin layers.
Further, the burial depth of the first piezoelectric intelligent aggregate and the second piezoelectric intelligent aggregate is 0.5 m.
Further, the distance between the first piezoelectric intelligent aggregate and the second piezoelectric intelligent aggregate is 1.0-1.5 m.
Further, the signal generator is model number LINI-T UTG 9005B.
Further, the signal amplifier is a GF-20 type power amplifier.
Further, the signal receiver adopts an oscilloscope.
Further, the oscilloscope is model LINI-T UTD2102 CEX.
Furthermore, a storage device is additionally arranged on the signal receiver and used for collecting and storing the electric signals in real time.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses a test system for stress wave in bituminous paving, including signal generator, signal amplifier, signal receiver and two piezoelectricity intelligence aggregates, piezoelectricity intelligence aggregate is buried inside bituminous paving, exert outside electricity excitation signal to first piezoelectricity intelligence aggregate through signal generator, under pulse signal's excitation and converse piezoelectricity effect, first piezoelectricity intelligence aggregate is as the driver, it is flexible repeatedly to go up the lower extreme production, owing to be connected completely with bituminous mixture, the displacement of first piezoelectricity intelligence aggregate is restricted, produce vibration from this, its vibration energy propagates with the form of sound wave, and can arouse second piezoelectricity intelligence aggregate production vibration. Under the effect of the positive piezoelectric effect, the second piezoelectric intelligent aggregate is used as a sensor and generates an electric signal by vibration, the second piezoelectric intelligent aggregate is connected with a signal amplifier, the signal amplifier converts a weak electric charge signal output by the sensor into an amplified voltage signal and transmits the amplified voltage signal to a signal receiver, and the signal receiver receives and reads the electric signal. The whole system is simple in structure, simple to operate and high in sensitivity, the piezoelectric intelligent aggregate is good in structural compatibility with the asphalt pavement, and the stress wave detection precision is improved; the system can be used for testing the asphalt pavement, can obtain information such as the propagation characteristics of sound waves in the asphalt mixture and the health condition of the interior of the pavement, can be applied to the detection of cracks of the asphalt concrete pavement, and provides a basis for quantitatively evaluating the early damage degree of the pavement.
Furthermore, the epoxy resin layer is wrapped outside the piezoelectric intelligent aggregate, the characteristics of the epoxy resin and the asphalt are similar, and the adhesion of the piezoelectric intelligent aggregate and the asphalt mixture can be improved by using the epoxy resin.
Furthermore, the signal generator is LINI-T UTG9005B, is multifunctional dual-channel, can be debugged internally and externally or manually, is provided with a multifunctional knob and a digital keyboard, and is quick and convenient in waveform parameter adjustment.
Further, the signal amplifier device has three-digit decimal sensor sensitivity adjustment, and the normalized output can be obtained by matching sensors with different sensitivities.
Further, the signal receiver is an oscilloscope, and can accurately capture the waveform.
Drawings
FIG. 1 is a schematic connection diagram of the present invention;
fig. 2 is a schematic diagram of the present invention.
Wherein: the method comprises the following steps of 1, 2, 3 and 1.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
as shown in fig. 1, the utility model discloses a test system for stress wave in bituminous paving, including signal generator, signal amplifier, signal receiver and two piezoelectricity intelligence aggregates, two piezoelectricity intelligence aggregates are buried inside bituminous paving 1, are first piezoelectricity intelligence aggregate 2 and second piezoelectricity intelligence aggregate 3 respectively, and first piezoelectricity intelligence aggregate 2 is as the driver, and second piezoelectricity intelligence aggregate 3 is as the sensor; the signal generator is connected with the first piezoelectric intelligent aggregate 2, the second piezoelectric intelligent aggregate 3 is connected with the signal amplifier, and the signal amplifier is connected with the signal receiver. The signal generator is used for applying an external electrical excitation signal to the piezoelectric intelligent aggregate serving as the driver, the signal amplifier is used for converting the electric signal output by the sensor into an amplified voltage signal, and the signal receiver is used for receiving the electric signal and displaying a signal waveform on the display screen.
The signal generator is LINI-T UTG9005B, the signal amplifier is GF-20 power amplifier, the signal receiver is oscilloscope, and the oscilloscope is LINI-T UTD2102 CEX.
And the signal receiver is also additionally provided with a storage device for acquiring and storing the electric signals in real time.
The piezoelectric intelligent aggregate is an intelligent aggregate compounded by piezoelectric ceramics and marble materials, is wrapped by epoxy resin and is embedded in a pavement, and can sense the actual stress condition of a structural material and be used for evaluating the damage of the structure. The buried depth of the first piezoelectric intelligent aggregate 2 and the second piezoelectric intelligent aggregate 3 is 0.5m, and the distance between the first piezoelectric intelligent aggregate 2 and the second piezoelectric intelligent aggregate 3 is 1.0 m-1.5 m.
The intelligent piezoelectric aggregate on the asphalt pavement is externally electrically excited by a signal generator, under the excitation of pulse signals and the reverse piezoelectric effect, the intelligent piezoelectric aggregate 2 serves as a driver, the upper end and the lower end of the intelligent piezoelectric aggregate stretch repeatedly, the displacement of the intelligent piezoelectric aggregate 2 is limited due to the fact that the intelligent piezoelectric aggregate is completely connected with the asphalt mixture, vibration is generated, the intelligent piezoelectric aggregate and the peripheral asphalt mixture form a piezoelectric smart module, the whole intelligent piezoelectric aggregate can be regarded as the signal generator, vibration energy of the intelligent piezoelectric aggregate is transmitted in a sound wave mode, and the intelligent piezoelectric aggregate 3 can be caused to vibrate. The signal generator transmits a signal to the first piezoelectric aggregate 2, the first piezoelectric aggregate 2 vibrates after the stimulation of the electric signal, and the vibration is transmitted to the second piezoelectric aggregate 3, which is equivalent to the signal generator of the next intelligent aggregate. Under the effect of the direct piezoelectric effect, the second piezoelectric intelligent aggregate 3 serves as a sensor and generates an electric signal by vibration, the second piezoelectric intelligent aggregate 3 is connected with a signal amplifier, the signal amplifier converts a weak electric charge signal output by the sensor into an amplified voltage signal and transmits the amplified voltage signal to a signal receiver, the signal receiver receives and reads the electric signal, and the waveform is easy to capture and analyze due to rich trigger functions and mathematical operation functions.
And comparing the signal characteristics obtained under the two conditions of existence of the defects and absence of the defects to obtain the information of the propagation characteristics of the sound waves in the asphalt mixture, the health condition of the interior of the pavement and the like. The utility model discloses a system can accurately test the propagation mode of stress wave in bituminous mixture, simultaneously through characteristics such as intensity, porosity, the internal defect of analysis propagation characteristic test bituminous mixture.
Claims (7)
1. The system for testing the stress wave in the asphalt pavement is characterized by comprising a signal generator, a signal amplifier, a signal receiver, a first piezoelectric intelligent aggregate (2) serving as a driver and a second piezoelectric intelligent aggregate (3) serving as a sensor, wherein the first piezoelectric intelligent aggregate (2) and the second piezoelectric intelligent aggregate (3) are embedded in the asphalt pavement (1);
the signal generator is connected with the first piezoelectric intelligent aggregate (2), the second piezoelectric intelligent aggregate (3) is connected with the signal amplifier, and the signal amplifier is connected with the signal receiver;
the signal generator is used for applying an external electrical excitation signal to the first piezoelectric intelligent aggregate (2), the signal amplifier is used for converting an electric signal output by the second piezoelectric intelligent aggregate (3) into an amplified voltage signal, and the signal receiver is used for receiving the electric signal and displaying a signal waveform on the display screen;
the burial depth of the first piezoelectric intelligent aggregate (2) and the second piezoelectric intelligent aggregate (3) is 0.5 m;
the distance between the first piezoelectric intelligent aggregate (2) and the second piezoelectric intelligent aggregate (3) is 1.0-1.5 m.
2. The system for testing stress waves in asphalt pavements according to claim 1, characterized in that the first piezoelectric intelligent aggregate (2) and the second piezoelectric intelligent aggregate (3) are externally wrapped with epoxy resin layers.
3. The system for testing stress waves in asphalt pavements according to claim 1, characterized in that the signal generator is of the type LINI-T UTG 9005B.
4. The system for testing stress waves in asphalt pavements according to claim 1, characterized in that the signal amplifier is of the type GF-20 power amplifier.
5. The system for testing stress waves in asphalt pavements according to claim 1, characterized in that the signal receiver employs an oscilloscope.
6. A test system for stress waves in asphalt pavements according to claim 5, characterized in that the oscilloscope is of the type LINI-T UTD2102 CEX.
7. The system for testing stress waves in asphalt pavements according to claim 1, characterized in that a storage device is additionally provided on the signal receiver for collecting and storing electric signals in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822123208.9U CN210090371U (en) | 2018-12-17 | 2018-12-17 | Test system for stress wave in asphalt pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822123208.9U CN210090371U (en) | 2018-12-17 | 2018-12-17 | Test system for stress wave in asphalt pavement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210090371U true CN210090371U (en) | 2020-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822123208.9U Expired - Fee Related CN210090371U (en) | 2018-12-17 | 2018-12-17 | Test system for stress wave in asphalt pavement |
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| Country | Link |
|---|---|
| CN (1) | CN210090371U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116183722A (en) * | 2023-04-26 | 2023-05-30 | 国网天津市电力公司电力科学研究院 | Method for eliminating thickness measurement error of epoxy resin insulating part based on double-frequency detection |
-
2018
- 2018-12-17 CN CN201822123208.9U patent/CN210090371U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116183722A (en) * | 2023-04-26 | 2023-05-30 | 国网天津市电力公司电力科学研究院 | Method for eliminating thickness measurement error of epoxy resin insulating part based on double-frequency detection |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200218 Termination date: 20201217 |