CN215493330U

CN215493330U - Device for accurately testing acoustic delay time of ultrasonic transducer

Info

Publication number: CN215493330U
Application number: CN202121191778.7U
Authority: CN
Inventors: 冯玉平
Original assignee: Northeast Forestry University
Current assignee: Northeast Forestry University
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-01-11
Anticipated expiration: 2031-05-31

Abstract

The utility model discloses a device for accurately testing the sound delay time of an ultrasonic transducer, belongs to the technical field of concrete nondestructive testing, and aims to solve the problems that the sound delay time test result of the ultrasonic transducer has large error and needs to be carried out by multiple persons in a matching way. Comprises a sliding test group, a guide rail beam, a scale beam and an ultrasonic instrument. Under the condition that the two ultrasonic transducers are coaxially limited, the distance between the testing ends of the two ultrasonic transducers is accurately adjusted, interference factors in a conventional testing method are eliminated, and ultrasonic data between the two ultrasonic transducers can be accurately acquired so as to achieve the purpose of accurately testing the delay time of the ultrasonic transducers.

Description

Device for accurately testing acoustic delay time of ultrasonic transducer

Technical Field

The utility model belongs to the technical field of concrete nondestructive testing, and particularly relates to a device for accurately testing the sound delay time of an ultrasonic transducer.

Background

Concrete structures are widely applied to roads, bridges, dams and building engineering, and the quality of the concrete structures directly influences the applicability, safety and durability of the structures. In the construction or use process, various defects can be generated inside the concrete structure due to construction errors, poor management or influence of natural disasters, so that the engineering quality is greatly influenced. The determination of the internal defects of the concrete structure needs to be judged by a scientific detection method. The ultrasonic method is the most widely and accurately detecting the internal defects of the concrete structure. When the ultrasonic method is used for detection, in order to ensure the accuracy of system test data, the delay time of the ultrasonic transducer during sound is required to be accurately measured before detection, and the ultrasonic instrument is calibrated.

At present, when testing the delay time of the ultrasonic transducer and calibrating the ultrasonic instrument, air is generally adopted as a medium, the two ultrasonic transducers are placed on a laboratory bench and held by a hand, the distance between the two transducers is measured by a steel ruler, then the ultrasonic sound time value in the distance is collected, the delay time of the ultrasonic transducer is calculated through the ultrasonic sound time value data obtained under different distance measurement, and the reading accuracy of the ultrasonic instrument is judged. The testing method needs more than two persons to cooperate, the error between the actual passing distance of the ultrasonic waves and the set standard distance is large, meanwhile, reflected waves are generated on the surfaces of the experiment table board and the steel ruler, the tested ultrasonic waveforms are interfered, the reading error is generated during sound, and the accuracy of the testing result is influenced to a great extent.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a device for accurately testing the sound delay time of an ultrasonic transducer, which is used for solving the problems that the sound delay time test result of the ultrasonic transducer has large error and needs to be carried out by multiple persons in a matching way. The technical scheme adopted by the utility model is as follows:

a device for accurately testing delay time of sound of an ultrasonic transducer comprises a base, a stand column, a guide rail beam, a sliding test group, a scale beam and an ultrasonic instrument; the base is symmetrically provided with two stand columns, the two ends of the guide rail cross beam are respectively connected with the two stand columns, the two groups of sliding test groups are respectively arranged on the guide rail cross beam in a sliding mode, the two ends of the scale cross beam arranged below the two groups of sliding test groups are respectively connected with the two stand columns, and the two groups of sliding test groups are respectively connected with the ultrasonic instrument through wires.

Furthermore, the scale crossbeam is marked with the size scale, and the position is accurately adjusted according to the scale that it was marked to the slip test group.

Further, the sliding test group comprises a sliding block, a fixing clamp and an ultrasonic transducer; the ultrasonic transducer is connected with the sliding block through the fixing clamp, the sliding block is in sliding fit with the guide rail beam, and the ultrasonic transducer is connected with the ultrasonic instrument through a lead.

Further, the two sets of sliding test sets are identical in structure, and the second set is a mirror image of the first set in the sliding direction.

Furthermore, the ultrasonic transducers of the two groups of sliding test groups are coaxial, and the test ends are oppositely arranged.

Further, the ultrasonic transducers of the two sets of sliding test sets are horizontally arranged.

Further, the retaining clip may be a tube clip.

Furthermore, the distance between the lower end of the fixing clamp and the scale beam is more than or equal to 15mm, and the distance between the upper end of the fixing clamp and the guide rail beam is more than or equal to 15 mm.

Compared with the prior art, the utility model has the beneficial effects that:

1. the distance between the testing ends of the two ultrasonic transducers can be conveniently and accurately adjusted under the condition of limiting the coaxiality of the two ultrasonic transducers by the guide rail beam, the sliding block, the fixing clamp and the scale beam, and the accurate measurement of data during ultrasonic sound is realized.

2. The upper end and the lower end of each ultrasonic transducer fixing clamp are respectively not less than 15mm away from the guide rail beam and the scale beam, so that the interference of ultrasonic reflected waves generated on the surfaces of the scale beam and the guide rail beam when ultrasonic waves are transmitted is avoided, and received waveforms are clearly visible in an ultrasonic instrument.

3. The test can be completed by one person.

Drawings

FIG. 1 is a schematic structural view of the present invention;

figure 2 is an enlarged view of a portion of the sliding test group,

in the figure: 1-base, 2-upright column, 3-guide rail beam, 4-sliding test group, 41-slide block, 42-fixing clamp, 43-ultrasonic transducer, 5-scale beam and 6-ultrasonic instrument.

Detailed Description

In order that the objects, aspects and advantages of the utility model will become more apparent, the utility model will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The connection mentioned in the utility model is divided into fixed connection and detachable connection, the fixed connection is non-detachable connection and comprises but is not limited to folding edge connection, rivet connection, bonding connection, welding connection and other conventional fixed connection modes, the detachable connection comprises but is not limited to bolt connection, buckle connection, pin connection, hinge connection and other conventional detachment modes, when the specific connection mode is not clearly limited, the skilled person can select at least one connection mode from the existing connection modes to realize the function according to the needs. For example: the fixed connection selects welding connection, and the detachable connection selects bolt connection.

The present invention will be described in further detail with reference to the accompanying drawings, and the following examples are illustrative of the present invention, but the present invention is not limited to the following examples.

As shown in the figure, an apparatus for accurately testing delay time of ultrasonic transducer is characterized in that: the device comprises a base 1, a stand column 2, a guide rail beam 3, a sliding test group 4, a scale beam 5 and an ultrasonic instrument 6; the base 1 is provided with two stands 2 in the symmetry, and the both ends of guide rail crossbeam 3 are connected with two stands 2 respectively, and two sets of slip test group 4 slide respectively and set up on guide rail crossbeam 3, and the both ends of setting up the scale crossbeam 5 of 4 below at two sets of slip test group are connected with two stands 2 respectively, and two sets of slip test group 4 still are connected with supersound appearance 6 through the wire respectively.

Further, the scale beam 5 is marked with dimension scales.

Further, the sliding test set 4 includes a slider 41, a fixing clip 42, and an ultrasonic transducer 43; the ultrasonic transducer 43 is connected with the sliding block 41 through the fixing clamp 42, the sliding block 41 is in sliding fit with the guide rail beam 3, and the ultrasonic transducer 43 is connected with the ultrasonic instrument 6 through a lead.

Further, the two sets of sliding test sets 4 are identical in structure, and the second set is a mirror image of the first set in the sliding direction.

Further, the ultrasonic transducers 43 of the two sets of sliding test sets 4 are coaxial and the test ends are arranged in opposite directions.

Further, the ultrasonic transducers 43 of the two sets of sliding test sets 4 are horizontally disposed.

Further, the retaining clip 42 may be a tube clip.

Furthermore, the distance between the lower end of the fixing clamp 42 and the scale beam 5 is more than or equal to 15mm, and the distance between the upper end of the fixing clamp 42 and the guide rail beam 3 is more than or equal to 15 mm.

During testing, air is used as a medium, and the distance between the testing ends of the two ultrasonic transducers 43 can be conveniently and accurately adjusted under the condition that the two ultrasonic transducers 43 are limited to be coaxial through the guide rail beam 3, the sliding block 41, the fixing clamp 42 and the scale beam 5.

The upper end and the lower end of the two ultrasonic transducer fixing clamps 42 are respectively not less than 15mm away from the guide rail beam 3 and the scale beam 5, so that the interference of ultrasonic reflected waves generated on the surfaces of the scale beam 5 and the guide rail beam 3 when ultrasonic waves are emitted is avoided, and received waveforms are clearly visible in the ultrasonic instrument 6.

Two ultrasonic transducers 43, one is used for the transmission of ultrasonic wave, and the other is used for the receipt of ultrasonic wave, has eliminated the interference again after accurate positioning, and the ultrasonic data between two ultrasonic transducers 43 is transmitted to the supersound appearance after being gathered, has realized the purpose of accurate test ultrasonic transducer time delay time.

Claims

1. An apparatus for accurately testing delay time of ultrasonic transducer is characterized in that: comprises a base (1), a column (2), a guide rail beam (3), a sliding test group (4), a scale beam (5) and an ultrasonic instrument (6); the base (1) is symmetrically provided with two stand columns (2), the two ends of a guide rail cross beam (3) are respectively connected with the two stand columns (2), two groups of sliding test groups (4) are respectively arranged on the guide rail cross beam (3) in a sliding mode, the two ends of a scale cross beam (5) arranged below the two groups of sliding test groups (4) are respectively connected with the two stand columns (2), and the two groups of sliding test groups (4) are further respectively connected with an ultrasonic instrument (6) through a wire.

2. The apparatus for accurately testing the delay time of an ultrasonic transducer in sound according to claim 1, wherein: the scale beam (5) is marked with size scales.

3. The apparatus for accurately testing the delay time of an ultrasonic transducer according to claim 2, wherein: the sliding test group (4) comprises a sliding block (41), a fixing clamp (42) and an ultrasonic transducer (43); the ultrasonic transducer (43) is connected with the sliding block (41) through the fixing clamp (42), the sliding block (41) is in sliding fit with the guide rail beam (3), and the ultrasonic transducer (43) is connected with the ultrasonic instrument (6) through a lead.

4. The apparatus for accurately testing the delay time of an ultrasonic transducer according to claim 3, wherein: the two sets of sliding test sets (4) are identical in structure, and the second set is a mirror image of the first set in the sliding direction.

5. The apparatus for accurately testing the delay time of an ultrasonic transducer according to claim 4, wherein: the ultrasonic transducers (43) of the two sliding test groups (4) are coaxial, and the test ends are arranged oppositely.

6. The apparatus for accurately testing the delay time of an ultrasonic transducer according to claim 5, wherein: the ultrasonic transducers (43) of the two sliding test groups (4) are horizontally arranged.

7. The apparatus for accurately testing the delay time of an ultrasonic transducer according to claim 6, wherein: the retaining clip (42) may be a tube clip.

8. The apparatus for accurately testing the delay time of an ultrasonic transducer according to claim 7, wherein: the distance between the lower end of the fixing clamp (42) and the scale beam (5) is not less than 15mm, and the distance between the upper end of the fixing clamp (42) and the guide rail beam (3) is not less than 15 mm.