CN215005137U - Ultrasonic transmission method concrete structure quality testing device and system - Google Patents
Ultrasonic transmission method concrete structure quality testing device and system Download PDFInfo
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- CN215005137U CN215005137U CN202023071921.7U CN202023071921U CN215005137U CN 215005137 U CN215005137 U CN 215005137U CN 202023071921 U CN202023071921 U CN 202023071921U CN 215005137 U CN215005137 U CN 215005137U
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Abstract
The utility model relates to an ultrasonic wave transmission method concrete structure quality testing arrangement and system, the device include host computer, two cables, two transducers, wherein: each cable contains a transducer cable and a multi-core optical fiber; the two transducers are respectively connected to the first ends of the transducer cables of the two cables, and the first end of the multi-core optical fiber of each cable is positioned at the transducer on the cable; the host is provided with an ultrasonic host and an optical fiber demodulator, the ultrasonic host is connected with the second ends of the transducer cables of the two cables, and the optical fiber demodulator is connected with the second ends of the multi-core optical fibers of the two cables. Compared with the prior art, the utility model discloses can accurately test the actual pipe spacing of each measurement station to guarantee the reliability of ultrasonic detection test result.
Description
Technical Field
The utility model belongs to concrete structure quality test field relates to foundation pile body integrality, underground diaphragm wall quality detection technique, especially relates to an ultrasonic transmission method concrete structure quality test device and system.
Background
The ultrasonic transmission method is a detection method for judging the integrity of a pile body of a foundation pile or the quality of an underground continuous wall body by transmitting and receiving ultrasonic waves in a pre-buried sounding pipe and actually measuring the relative change of acoustic parameters such as sound velocity, wave amplitude, frequency and the like when the ultrasonic waves are transmitted in a concrete medium. The sound velocity is an index which reflects the concrete quality more reliably. In the detection by an ultrasonic transmission method, the sound velocity Vi of each measuring point is not a direct measurement quantity, and is obtained by actually measuring the propagation time ti of the ultrasonic wave of each measuring point in a concrete medium and the distance L0 between the outer walls of the pile top sounding pipes by an instrument, wherein Vi is L0/ti.
However, in actual engineering, the sound-measuring tubes are difficult to keep absolute parallel, and if the sound-measuring tubes are not properly operated or connected and fixed during installation, the sound-measuring tubes may be seriously inclined, bent and warped, so that the distance measurement of each measuring point in the same section is greatly different, the sound velocity calculated by the above formula is greatly different from the actual sound velocity of the measuring point, and even the detection test fails (the actual measurement data cannot be analyzed).
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an ultrasonic transmission method concrete structure quality testing device and system for overcoming the defects of the prior art. The actual pipe distance of each measuring point can be accurately tested, so that the reliability of the ultrasonic detection test result is ensured.
The purpose of the utility model can be realized through the following technical scheme:
the invention provides a quality testing device for a concrete structure by an ultrasonic transmission method, which comprises:
two cables, each cable containing a transducer cable and a multicore fiber,
two transducers respectively connected to the first ends of the transducer cables of the two cables, the first end of the multicore fiber of each cable being located at the transducer on the cable,
the host computer is provided with an ultrasonic host computer and an optical fiber demodulator, the ultrasonic host computer is connected with the second ends of the transducer cables of the two cables, and the optical fiber demodulator is connected with the second ends of the multi-core optical fibers of the two cables.
Preferably, both cables have a wrapping.
Preferably, one of the two transducers is a transmitting transducer and the other transducer is a receiving transducer.
Preferably, the ultrasonic host is used for measuring parameters of ultrasonic wave propagation between the two transducers, and the parameters comprise propagation time, amplitude and/or frequency.
Preferably, the optical fiber demodulator is configured to measure a relative change amount between the first ends of the multi-core optical fibers of the two cables and the pipe orifice of the acoustic measurement pipe where the first ends of the multi-core optical fibers of the two cables are located, and obtain a distance between the first ends of the multi-core optical fibers of the two cables through conversion.
Preferably, the optical fiber demodulator is further connected to the ultrasonic host for transmitting the obtained distance between the first ends of the multi-core optical fibers of the two cables to the ultrasonic host.
Preferably, the host further comprises a housing, and the ultrasonic host and the optical fiber demodulator are integrated in the housing.
Preferably, the ultrasonic host is a commercially available ultrasonic detector, and the optical fiber demodulator is a commercially available optical fiber demodulator.
The invention provides a system for measuring the distance between two sounding pipes by an ultrasonic transmission method, which comprises two sounding pipes and the device, wherein two cables of the device respectively extend into the two sounding pipes.
Preferably, the sounding pipe is embedded in a concrete structure, and the concrete structure comprises a foundation pile body or an underground continuous wall body.
The working principle of the invention is as follows:
the utility model discloses at the during operation, the mouth of pipe of two sounding pipes is as fixed known point, can test its three-dimensional coordinate, and multicore optic fibre measurement station accessible fiber demodulator of ultrasonic transducer measurement point department calculates its relative orificial relative variation to reach the three-dimensional coordinate of measurement point, can obtain the distance between the multicore optic fibre measurement station of two cables according to multicore optic fibre measurement station coordinate in two pipes, obtain actual tube spacing, the precision can reach 1mm or higher. And inputting or transmitting the calculated actual pipe distance data to the ultrasonic host to participate in sound velocity calculation.
The depth positioning and measuring device of the existing matched device of the ultrasonic instrument can measure the real-time depth of the transducer, and the depth positioning and measuring device can measure the depth z of each measuring point while the ultrasonic instrument measures the sound of each measuring point, so that a function t (z) can be obtained when the sound at each depth is reflected in real time; similarly, based on the improved apparatus for testing the actual tube pitch L and the depth positioning apparatus, a function of L (z) can be obtained. It is thus found that the sound velocity v (z) ═ l (z)/t (z) at each measurement point (depth).
The utility model discloses an installation multicore optic fibre and optical fiber demodulator, can be when the ti of transducer test sound, the actual tube pitch of each measurement station of synchronous test to reach the actual sound velocity of ultrasonic wave when propagating in the concrete medium. The estimated sound velocity deviation caused by the unparallel of the sound measuring tube (serious inclination, bending, warping and the like of the sound measuring tube) is avoided. Thereby ensuring the accuracy of concrete quality judgment.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses an installation multicore optic fibre and optic fibre demodulator can test actual tube spacing in step often at each measurement station sound of transducer test to reach actual sound velocity. The estimated sound speed deviation caused by the unparallel of the sound measuring tube is avoided. Thereby ensuring the accuracy of concrete quality judgment.
(2) The current situation, during ultrasonic testing, it is decided that concrete quality defect degree of depth is decided by degree of depth positioner or mouth of pipe transducer cable mark scale reading, but when the sounding pipe seriously twists, there will be certain error in cable scale reading and the actual degree of depth of defect, and when overlength major diameter bored concrete pile, the error is bigger. The utility model discloses a transducer measurement station coordinate and the orificial known coordinate of sounding pipe that measure can solve the difference in height of transducer position and ground, solve the plummet degree of depth of transducer, can avoid concrete defect degree of depth location or the long test error of stake that arouses by sounding pipe nonparallel.
(3) The device is suitable for testing the quality of various concrete structures needing to achieve the effect.
Drawings
Fig. 1 is a schematic view of the device for testing the quality of a concrete structure by using an ultrasonic transmission method according to the present invention.
In the figure, 1 is a main unit, 11 is an ultrasonic main unit, 12 is an optical fiber demodulator, 2 is a cable, 21 is a transducer cable, 22 is a multi-core optical fiber, 3 is a transducer, 4 is a sounding pipe, 41 is a pipe orifice, and 5 is a concrete structure.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Example 1
An ultrasonic transmission method concrete structure quality testing device, as shown in fig. 1, comprises a host 1, two cables 2, two transducers 3, wherein:
each cable 2 contains a transducer cable 21 and a multi-core optical fiber 22; the two transducers 3 are respectively connected to the first ends of the transducer cables 21 of the two cables 2, and the first end of the multi-core fiber 22 of each cable 2 (the measuring point of the multi-core fiber 22 is located at the end) is located at the transducer 3 on the cable 2; the main unit 1 has an ultrasonic main unit 11 and a fiber demodulator 12, the ultrasonic main unit 11 is connected to the second ends of the transducer cables 21 of the two cables 2, and the fiber demodulator 12 is connected to the second ends of the multi-core fibers 22 of the two cables 2.
The transducer cable 21 and the multi-core fiber 22 in the cable 2 of the present invention may be separately disposed, or may be wrapped with a wrapping layer, as shown in fig. 1, in which both cables 2 have wrapping layers.
For the transducer 3 of the present invention, of the two transducers 3, one transducer 3 is a transmitting transducer and the other transducer 3 is a receiving transducer. During detection, the transmitting transducer starts to penetrate through the concrete between the two pipes and then is received by the receiving transducer. The ultrasound host 11 in this embodiment is used to measure the parameters of the ultrasound wave propagating between the two transducers 3, including the propagation time as well as the amplitude, and/or the frequency. The ultrasonic main unit 11 is a commercially available ultrasonic detector that can be used for the ultrasonic transmission method.
In this embodiment, the optical fiber demodulator 12 is configured to measure a relative variation between the first ends of the multi-core fibers 22 of the two cables 2 and the pipe orifice 41 of the acoustic measurement pipe 4 where the first ends are located, and convert to obtain a distance between the first ends of the multi-core fibers 22 of the two cables 2, so as to obtain an actual pipe distance. In this embodiment, the optical fiber demodulator 12 may be further connected to the ultrasonic host 11, and configured to transmit the obtained distance (i.e., the tube pitch at the measurement point) between the first ends of the multi-core fibers 22 of the two cables 2 to the ultrasonic host 11. The data of the fiber demodulator 12 may also be input to the ultrasonic host 11 by way of input. In this embodiment, as shown in fig. 1, the host 1 may further include a housing, and the ultrasonic host 11 and the optical fiber demodulator 12 are integrated in the housing. The integration level is higher, and the use is more convenient.
Example 2
A system for measuring the distance between two sounding pipes by an ultrasonic transmission method comprises two sounding pipes 4 and the device of embodiment 1, wherein two cables 2 of the device respectively extend into the two sounding pipes 4. The sounding pipe 4 is pre-buried in the concrete structure 5, and the concrete structure can be a foundation pile body, an underground continuous wall body, and other concrete structure quality tests which need to achieve similar effects.
During detection, the pipe orifices 41 of the two sound measurement pipes 4 are used as fixed known points, the three-dimensional coordinates of the fixed known points can be tested, the relative variation of the multi-core optical fiber 22 measuring points at the measuring points of the (ultrasonic) transducer 3 relative to the pipe orifices 41 can be calculated through the optical fiber demodulator 12, so that the three-dimensional coordinates of the measuring points can be obtained, the distance between the multi-core optical fiber measuring points of the two cables can be obtained according to the measuring point coordinates of the multi-core optical fibers 12 in the two sound measurement pipes 4, the actual pipe distance can be obtained, and the precision can reach 1mm or higher. And inputting or transmitting the calculated actual pipe distance data to the ultrasonic host to participate in sound velocity calculation.
The depth positioning and measuring device of the existing matched device of the ultrasonic instrument can measure the real-time depth of the transducer, and the depth positioning and measuring device can measure the depth z of each measuring point while the ultrasonic instrument measures the sound of each measuring point, so that a function t (z) can be obtained when the sound at each depth is reflected in real time; similarly, based on the improved apparatus for testing the actual tube pitch L and the depth positioning apparatus, a function of L (z) can be obtained. It is thus found that the sound velocity v (z) ═ l (z)/t (z) at each measurement point (depth). The utility model discloses can accurately test the actual pipe spacing of each measurement station to guarantee the reliability of ultrasonic detection test result.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.
Claims (10)
1. An ultrasonic transmission method concrete structure quality testing device is characterized by comprising:
two cables (2), each cable (2) containing a transducer cable (21) and a multicore fiber (22),
two transducers (3) connected to the first ends of the transducer cables (21) of the two cables (2), respectively, the first end of the multicore fiber (22) of each cable (2) being located at the transducer (3) on that cable (2),
the host (1) is provided with an ultrasonic host (11) and an optical fiber demodulator (12), the ultrasonic host (11) is connected with the second ends of the transducer cables (21) of the two cables (2), and the optical fiber demodulator (12) is connected with the second ends of the multi-core optical fibers (22) of the two cables (2).
2. An ultrasonic transmission method concrete structure quality testing device according to claim 1, characterized in that both cables (2) have a wrapping.
3. An ultrasonic transmission method concrete structure quality testing device according to claim 1, characterized in that one of the two transducers (3) is a transmitting transducer and the other transducer (3) is a receiving transducer.
4. An ultrasonic transmission method concrete structure quality testing device according to claim 1, characterized in that the ultrasonic host (11) is used for measuring the parameters of ultrasonic wave propagation between two transducers (3), wherein the parameters comprise propagation time and amplitude, and/or frequency.
5. The device for testing the quality of the concrete structure by the ultrasonic transmission method according to claim 1, wherein the optical fiber demodulator (12) is used for measuring the relative variation of the first ends of the multi-core optical fibers (22) of the two cables (2) and the pipe orifice (41) of the sound measuring pipe (4) where the first ends are located, and converting the relative variation to obtain the distance between the first ends of the multi-core optical fibers (22) of the two cables (2).
6. An ultrasonic transmission method concrete structure quality testing device according to claim 5, characterized in that said optical fiber demodulator (12) is further connected to the ultrasonic host (11) for transmitting the obtained distance between the first ends of the multi-core optical fibers (22) of the two cables (2) to the ultrasonic host (11).
7. The device for testing the quality of the concrete structure by the ultrasonic transmission method according to claim 1, wherein the host machine (1) further comprises a housing, and the ultrasonic host machine (11) and the optical fiber demodulator (12) are integrated in the housing.
8. The apparatus for testing the quality of a concrete structure by ultrasonic transmission method according to claim 1, wherein the ultrasonic host (11) is a commercially available ultrasonic detector, and the optical fiber demodulator (12) is a commercially available optical fiber demodulator.
9. An ultrasonic transmission method concrete structure quality testing system, characterized in that, comprises two sound measuring tubes (4) and the device of any claim 1-8, two cables (2) of the device respectively extend into the two sound measuring tubes (4).
10. The system for testing the quality of the concrete structure by the ultrasonic transmission method according to claim 9, wherein the sound measuring pipe (4) is embedded in the concrete structure (5), and the concrete structure comprises a foundation pile body or an underground continuous wall body.
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| CN202023071921.7U CN215005137U (en) | 2020-12-18 | 2020-12-18 | Ultrasonic transmission method concrete structure quality testing device and system |
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| CN202023071921.7U CN215005137U (en) | 2020-12-18 | 2020-12-18 | Ultrasonic transmission method concrete structure quality testing device and system |
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