CN215909968U

CN215909968U - Acoustic test support

Info

Publication number: CN215909968U
Application number: CN202121742452.9U
Authority: CN
Inventors: 郑笑笑; 王维; 薛彩虹
Original assignee: iFlytek Co Ltd
Current assignee: iFlytek Co Ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2022-02-25
Anticipated expiration: 2031-07-27

Abstract

The utility model provides an acoustic test stand, comprising: a base; the first mounting rack is mounted on the base and used for mounting test equipment; the second supporting column is arranged on the base; the first clamp is arranged on the second supporting column and used for clamping standard equipment; the second clamp is movably arranged on the second supporting column along the length direction of the second supporting column and is used for clamping the equipment to be tested; and the calibration equipment is arranged on at least one of the first mounting frame, the first clamp and the second clamp and is used for aligning the test equipment with the standard equipment or the equipment to be tested. The support aims at the positions of the test equipment and the standard equipment through the calibration equipment, and the position of the equipment to be tested on the second supporting column is moved by adjusting the second clamp, so that the equipment to be tested accurately replaces the position of the standard equipment, and the accuracy, precision and test efficiency of acoustic test are improved.

Description

Acoustic test support

Technical Field

The utility model relates to the technical field of testing of electronic products, in particular to an acoustic testing support.

Background

When the acoustic test of the electronic product is performed, the sound field of the test equipment needs to be calibrated through the standard equipment, the equipment to be tested replaces the position of the standard equipment, and the test equipment is used for testing the equipment to be tested.

In the prior art, three equipment positions are usually fixed by a tripod, and standard equipment and test equipment are aligned in a manual distance measurement adjusting mode, so that a sound field is calibrated.

SUMMERY OF THE UTILITY MODEL

The utility model provides an acoustic test bracket which is used for solving the problems that the acoustic test accuracy of an electronic product is not high and the test efficiency is low in the prior art.

The utility model provides an acoustic test stand, comprising:

a base;

the first mounting rack is mounted on the base and used for mounting test equipment;

a second support post mounted to the base;

the first clamp is arranged on the second supporting column and used for clamping standard equipment;

the second clamp is movably arranged on the second supporting column along the length direction of the second supporting column and is used for clamping equipment to be tested;

and the calibration equipment is arranged on at least one of the first mounting frame, the first clamp and the second clamp and is used for aligning the test equipment with the standard equipment or the equipment to be tested.

According to the acoustic test support provided by the utility model, the calibration equipment is arranged on both the first mounting frame and the first clamp.

According to the present invention there is provided an acoustic test stand, the base comprising: a mounting seat and a slide rail;

the mounting seat is connected with the slide rail;

the first mounting bracket is installed in the mounting seat, the second support column is installed in the slide rail movably along the length direction of the slide rail.

According to the acoustic test support provided by the utility model, the slide rail is also provided with a scale assembly.

According to the acoustic test bracket provided by the utility model, the mounting seat comprises a first mounting seat and a second mounting seat, and two ends of the sliding rail are respectively connected with the first mounting seat and the second mounting seat.

According to an acoustic test mount provided by the present invention, the first mount includes: a first support column and a first support table;

first support column install in the base, first supporting bench follows the length direction movably install in of first support column.

According to the acoustic test support provided by the utility model, the first clamp is movably mounted on the second supporting column along the length direction of the second supporting column.

According to the acoustic test support provided by the utility model, the first support column is a telescopic support column;

and/or the second support column is a telescopic support column.

According to the acoustic test support provided by the utility model, the second clamp is multiple.

According to the acoustic test bracket provided by the utility model, the sliding seat and the clamping part are connected, and the sliding seat is connected with the clamping part;

the sliding seat is movably arranged on the second supporting column along the length direction of the second supporting column;

the clamping part is used for clamping the equipment to be tested.

According to the acoustic test support provided by the utility model, the calibration equipment is aligned with the test equipment and the standard equipment, and the second clamp is adjusted to move the position of the equipment to be tested on the second supporting column, so that the equipment to be tested can accurately replace the position of the standard equipment, and the accuracy, precision and test efficiency of acoustic test are improved.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of an acoustic test mount provided by the present invention.

Reference numerals:

11: a first support column; 12: a first support table; 21: a second support column;

22: a first clamp; 23: a second clamp; 30: calibrating equipment;

40: a slide rail; 51: a first mounting seat; 52: a second mounting seat;

60: testing equipment; 70: standard equipment; 80: and (5) equipment to be tested.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any of the various embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The acoustic test mount of the present invention is described below in conjunction with fig. 1.

The acoustic test support provided by the utility model can be applied to the microphone test or the sound test of a terminal, can also be applied to a single microphone or a single sound, and tests the functions of the acoustic devices such as the microphone or the sound, such as the sound quality, the volume, the sound receiving effect, the voice recognition and the like.

The terminal can be an electronic device, and the electronic device can be, for example, a translator, a voice recording pen, a scanning pen, a learning machine, a mobile phone, a tablet computer, a vehicle-mounted electronic device, a wearable device, or the like.

As shown in fig. 1, an acoustic test rack provided by an embodiment of the present invention includes: the calibration device comprises a base, a first mounting frame, a second supporting column 21, a first clamp 22, a second clamp 23 and calibration equipment 30.

The base is the support component of the bottommost end of the acoustic test support, and mainly plays a role in supporting the support and bearing the support load.

The first mounting bracket is mounted on the base and used for mounting the testing equipment 60, bears the load of the testing equipment 60 and transmits the load of the testing equipment 60 to the base so as to ensure the stability of the testing equipment 60.

The first mounting frame can be mounted on the base in a fastening piece connection mode, a threaded connection mode, a buckling connection mode or other connection modes; the first mounting bracket may also be integral with the base, i.e. the first mounting bracket is vertically disposed at one end of the base.

Wherein the length of the first mounting bracket can be adjusted according to the size of the test equipment 60 supported by the first mounting bracket.

The test equipment 60 may be a sound emitting device or a sound receiving device or the like for testing, providing a sound source or a standard sound receiving device, such as a sound box, an artificial mouth or a microphone or the like, for acoustic testing.

The second support column 21 is mounted on the base, the second support column 21 is further provided with a first clamp 22 and a second clamp 23, and the first clamp 22 and the second clamp 23 are arranged at different positions along the length direction of the second support column 21.

The first clamp 22 is used for clamping and fixing the standard equipment 70, the second clamp 23 is used for clamping and fixing the equipment 80 to be tested, and the types of the first clamp 22 and the second clamp 23 can be selected according to the type of the fixed equipment.

The first clamp 22 can be mounted to the second support post 21 by a fastener connection, a threaded connection, or a snap-fit connection.

The second clamp 23 can be movably mounted on the second support column 21 through a connection manner such as fastener connection, screw connection or snap connection, that is, the second clamp 23 can move up and down along the length direction of the second support column 21 and be mounted at different positions on the second support column 21.

The standard device 70 held by the first holder 22 is used for acoustic testing, a reference contrast is provided for the second holder 23 to hold the device under test 80, and the quality of the device under test 80 is evaluated according to the difference in acoustic performance between the tested device under test 80 and the standard device 70.

The standard equipment 70 and the equipment to be tested 80 are of the same type, and when the equipment to be tested 80 is a sound generating device, a standard sound generating device without errors is selected as the standard equipment 70; when the device under test 80 is a sound receiving device, a standard sound receiving device without error is selected as the standard device 70.

For example, the device under test 80 is a microphone and the standard device 70 is a standard microphone.

The calibration device 30 is a device having a ranging calibration function, and is configured to align the test device 60 with the standard device 70, or align the test device 60 with the device under test 80, so as to align the playing end with the receiving end, and provide an accurate acoustic test environment.

A calibration device 30 is mounted on at least one of the first mounting frame, the first clamp 22 and the second clamp 23, as shown in the following expressions.

First, a calibration device 30 is mounted on the first mounting bracket.

The calibration device 30 is mounted on the first mounting frame, so that the test device 60 is aligned with the standard device 70, and the sound field between the test device 60 and the standard device 70 is adjusted and calibrated.

Secondly, a calibration device 30 is mounted on the first clamp 22.

The sound field between the calibration test apparatus 60 and the calibration standard apparatus 70 is adjusted by aligning the calibration apparatus 30 mounted on the first jig 22 with the standard apparatus 70 and the test apparatus 60.

And thirdly, the second clamp 23 is provided with a calibration device 30.

The calibration device 30 mounted on the second fixture 23 is used to align the position of the device under test 80 with the position of the test device 60, so that the alignment between the playing end and the receiving end is realized, and an accurate acoustic test environment is provided.

And fourthly, the first clamp 22, the second clamp 23 and the first mounting rack are all provided with calibration equipment 30.

The sound field between the calibration test device 60 and the standard device 70 is adjusted by aligning the positions of the test device 60 and the standard device 70 using the calibration devices 30 mounted on the first jig 22 and the first mounting frame, respectively.

The second fixture 23 is adjusted to move the position of the device 80 to be tested on the second support column 21, and then the calibration device 30 mounted on the second fixture 23 is utilized to align the position of the device 80 to be tested with the position of the test device 60, so that the alignment of the playing end and the receiving end is realized, and an accurate acoustic test environment is provided.

In the related art, the support for fixing the device under test 80 is mostly a tripod, which cannot ensure accurate replacement of the device under test 80 and the standard device 70, and in the process of manually measuring the distance for replacement, replacement errors in different directions may be generated.

Since the acoustic test is sensitive to the distance, the sound field may be changed due to the substitution error generated in the substitution process of the device under test 80 and the standard device 70, which reduces the accuracy of the acoustic test, and may cause the recalibration to be required, which reduces the test efficiency.

According to the acoustic test bracket, the first mounting frame for placing the test equipment 60 and the second support column 21 for placing the equipment to be tested 80 and the standard equipment 70 are mounted on the same base, and the calibration equipment 30 can be used for aligning the positions of the test equipment 60 and the standard equipment 70, so that the sound field calibration between the test equipment 60 and the standard equipment 70 is realized.

After the sound field is calibrated, the position of the device to be tested 80 on the second support column 21 is moved by adjusting the second clamp 23, and the first clamp 22 and the second clamp 23 are installed on the same second support column 21, so that the device to be tested 80 can accurately replace the position of the standard device 70, and the acoustic testing accuracy and precision are improved.

In addition, when different devices to be tested 80 are measured, accurate acoustic testing can be realized only by adjusting the position of the second clamp 23, and the testing efficiency is greatly improved.

It should be noted that, after the sound field is calibrated, the standard device 70 on the first fixture 22 may be removed, and the second fixture 23 may be adjusted again to avoid blocking the movement of the device under test 80.

For example, the test device 60 is a sound box, the standard device 70 is a standard microphone, the device under test 80 is a microphone to be tested, and the sound field is calibrated by the standard microphone by aligning the positions of the standard microphone and the sound box through the calibration device 30.

The standard microphone is taken down, the second clamp 23 for fixing the microphone to be tested is adjusted, so that the sound pickup hole of the microphone to be tested can replace the sound pickup hole of the standard microphone in high precision, and the accuracy, precision and efficiency of acoustic testing are improved.

According to the acoustic test support provided by the utility model, the calibration equipment 30 aligns the positions of the test equipment 60 and the standard equipment 70, and the second clamp 23 is adjusted to move the position of the equipment to be tested 80 on the second support column 21, so that the equipment to be tested 80 accurately replaces the position of the standard equipment 70, and the accuracy, precision and test efficiency of acoustic test are improved.

In some embodiments, a calibration apparatus 30 is mounted on both the first clamp 22 and the first mounting bracket.

In this embodiment, the calibration device 30 is no longer mounted on the second fixture 23, and the sound field between the test device 60 and the standard device 70 is calibrated by using the first fixture 22 and the calibration device 30 on the first mounting rack to align the positions of the two devices of the test device 60 and the standard device 70.

And then, moving the position of the device to be tested 80 on the second supporting column 21 by adjusting the second clamp 23, so that the device to be tested 80 accurately replaces the position of the standard device 70, and performing acoustic testing.

In some embodiments, the calibration device 30 may be a laser rangefinder.

A laser rangefinder is an instrument that uses a parameter of modulated laser light to achieve a distance measurement to a target.

A laser range finder is mounted on at least one of the first mounting bracket and the first clamp 22, as shown in the following expressions.

A laser range finder is mounted on the first mounting frame.

The test equipment 60 is aligned with the standard equipment 70 by mounting a laser rangefinder on the first mounting bracket for measuring the distance of the test equipment 60 to a reference point on the base, the reference point being the point on the base where the test equipment 60 corresponds in the vertical direction.

For example, the laser range finder is mounted at the same vertical line as the center point of the sound box of the test device 60, and is used for measuring the distance between the sound source of the sound box and a reference point on the base.

Second, a laser range finder is mounted on the first jig 22.

The standard device 70 is aligned with the test device 60 by mounting a laser range finder on the first fixture 22 for measuring the distance from the standard device 70 to a reference point on the base, which is the point on the base where the standard device 70 corresponds to in the vertical direction.

And thirdly, laser range finders are arranged on the first clamp 22 and the first mounting frame.

The distance from the mastering device 70 to a reference point on the base and the distance from the testing device 60 to a reference point on the base are measured using laser rangefinders mounted to the first jig 22 and the first mounting bracket, respectively, to ensure positional alignment of the mastering device 70 and the testing device 60.

For example, the laser distance meter is on the same vertical line with the center point of the sound box and is used for measuring the distance between a sound source and a reference point; another laser rangefinder is used to measure the distance of the standard microphone from the reference point to ensure that the center point of the enclosure is level with the standard microphone in order to calibrate the sound field.

In some embodiments, the base includes a mounting seat and a slide rail 40, the slide rail 40 is connected to the mounting seat, the first mounting seat is mounted to the mounting seat, and the second supporting column 21 is movably mounted to the slide rail 40 along the length direction of the slide rail 40.

The mount pad can be provided with the connecting piece of first mounting bracket adaptation for first mounting bracket can be installed on the mount pad through connected modes such as fastener connection, threaded connection or buckle connection.

For example, the mounting seat is provided with a threaded mounting hole, the bottom end of the first mounting bracket is a threaded section matched with the threaded mounting hole, and the first mounting bracket is mounted on the mounting seat in a threaded connection mode.

The mounting base may also be integral with the first mounting frame, i.e. the first mounting frame is vertically arranged at one end of the mounting base.

The first mounting bracket is fixedly mounted on the mounting seat of the base, the second supporting column 21 is movably mounted on the sliding rail 40 of the base, and the mounting seat is connected with the sliding rail 40, that is, the second supporting column 21 can slide on the base towards or away from the first mounting bracket.

By moving the position of the second supporting column 21 on the sliding rail 40, the horizontal distance between the testing device 60 and the standard device 70 or the device to be tested 80 is further adjusted, and the moving process of the second supporting column 21 only adjusts the distance between the devices in the length direction of the sliding rail 40, so that a horizontal error caused by left-right shaking is avoided.

The second support post 21 is movably mounted to the slide rail 40 along the length direction of the slide rail 40, and may be represented by the following two expressions.

A groove is formed in the sliding rail 40, and a sliding rail 40 protrusion matched with the groove is arranged at the lower end of the second supporting column 21.

The protrusion of the sliding rail 40 of the second supporting column 21 extends into the groove of the sliding rail 40 and is movably mounted on the sliding rail 40.

Secondly, the sliding rail 40 is provided with a bulge, and the lower end of the second supporting column 21 is provided with a sliding rail 40 groove matched with the bulge.

The protrusion of the slide rail 40 extends into the groove of the slide rail 40 of the second support column 21, and the second support column 21 is movably mounted on the slide rail 40.

Of course, in other embodiments, the second supporting column 21 can be movably mounted to the sliding rail 40 through the sliding rail 40 assembly, and other forms can also be embodied, which is not limited in the embodiments of the present invention.

It should be noted that the slide rail 40 is as narrow as possible while ensuring the sliding function provided for the second support pillar 21, and the surface of the slide rail 40 exposed outside may be covered with sound-absorbing cotton to reduce the influence of the sound reflection of the acoustic test support on the test.

In some embodiments, the slide rail 40 is also provided with a scale assembly.

The scale assembly may be disposed beside the slide rail 40 for measuring a horizontal distance between the second supporting column 21 and the first mounting frame, and further adjusting a distance between the testing device 60 and the device under test 80 or the standard device 70.

The length of the slide rail 40 and the measurable distance of the scale assembly are adjusted according to the size of the acoustic test environment and the size of the device.

The arrangement of the slide rail 40 and the calibration equipment 30 can realize the automatic distance measurement of the equipment to be tested 80 and the standard equipment 70 on the test equipment 60 and the second support column 21 of the first mounting frame, ensure the preparation of sound field calibration and improve the accuracy, precision and efficiency of acoustic test.

In some embodiments, the mounting seat includes a first mounting seat 51 and a second mounting seat 52, and two ends of the slide rail 40 are respectively connected to the first mounting seat 51 and the second mounting seat 52.

The first installation seat 51 and the second installation seat 52 are respectively located at two ends of the base, the first installation seat 51 is connected with one end of the slide rail 40, and the second installation seat 52 is connected with the other end of the slide rail 40.

The first mounting bracket may be mounted on the first mounting base 51, or may be mounted on the second mounting base 52, and according to the requirement of the acoustic test, one first mounting bracket may be mounted on each of the first mounting base 51 and the second mounting base 52, and the testing device 60 is placed on the first mounting bracket and the second mounting base 52.

The slide rail 40 is located between the first installation seat 51 and the second installation seat 52, and the distance from the second support column 21 to the first installation seat 51 or to the second installation seat 52 can be adjusted through the slide rail 40.

In some embodiments, the first mounting bracket includes a first support column 11 and a first support table 12.

Wherein, first support column 11 is installed in the base, and first supporting bench 12 is installed in first support column 11 movably along the length direction of first support column 11.

The first supporting platform 12 can be movably mounted on the first supporting column 11 through a fastener, a screw connection, a snap connection or other connection modes, that is, the first supporting platform 12 can move up and down along the length direction of the first supporting column 11 and be mounted at different positions on the first supporting column 11.

The first support table 12 is used to support the test device 60, and the first support column 11 is used to support the first support table 12 and the test device 60.

A fixing member, such as a fixing clamp plate, may be disposed on the first support table 12, so that the testing device 60 is firmly fixed on the first support table 12, and additional mechanical vibration is prevented from being generated during testing.

It should be noted that the first support table 12 is as thin and narrow as possible under the precondition of the guaranteed support effect, and the first support column 11 is as thin as possible under the precondition of the guaranteed support effect, so as to reduce the influence of the acoustic test support on the acoustic reflection.

The first support table 12 moves up and down on the first support column 11, so as to adjust the position of the test equipment 60 on the first support column 11, and the calibration equipment 30 is combined to realize the position alignment of the test equipment 60 and the standard equipment 70.

For example, the laser distance measuring instrument is installed below the first support table 12, and is on the same vertical line with the central point of the sound box on the first support table 12, and measures the distance between the sound source and the reference point, and by adjusting the position of the first support table 12 on the first support column 11, the central point of the sound box is as high as the standard microphone, so that the alignment of the receiving end and the transmitting end is realized, and the laser distance measuring instrument is used for calibrating the sound signal emitted by the sound box.

In some embodiments, the first clamp 22 is movably mounted to the second support column 21 along the length of the second support column 21.

The first clamp 22 can be movably mounted on the second support column 21 through a connection manner such as fastener connection, screw connection or snap connection, that is, the first clamp 22 can move up and down along the length direction of the second support column 21 and be mounted at different positions on the second support column 21.

The first clamp 22 moves up and down on the second support column 21, so as to adjust the position of the standard equipment 70 on the second support column 21, and the calibration equipment 30 is combined to realize the position alignment of the standard equipment 70 and the test equipment 60.

For example, the laser range finder is mounted below the first fixture 22, aligned with the standard microphone on the first fixture 22, measures the distance between the pick-up hole of the standard microphone and the reference point, and adjusts the position of the first fixture 22 on the second support column 21 so that the pick-up hole of the standard microphone is equal to the height of the test equipment 60, thereby achieving the alignment of the receiving end and the transmitting end to calibrate the sound field.

In this embodiment, the first fixture 22 for fixing the standard microphone may be a tray provided with a groove, the size of the groove is adapted to the size of the standard microphone, the standard microphone is placed in the groove, the standard microphone can be prevented from shaking, and the groove is provided to facilitate the alignment between the sound pickup hole of the microphone to be tested and the sound pickup hole of the standard microphone.

In some embodiments, the first support column 11 is a telescoping support column; and/or the second support column 21 is a telescoping support column.

The selection of the kinds of the first support column 11 and the second support column 21 can be expressed in the following three expressions.

First, the first support column 11 is a telescopic support column.

In this embodiment, the first support column 11 is a telescopic support column, the length of the first support column 11 is adjustable, and the position alignment between the standard device 70 and the test device 60 can be realized by adjusting the telescopic state of the first support column 11, adjusting the distance between the test device 60 and the base reference point, and combining the calibration device 30.

The second and second support columns 21 are telescopic support columns.

In this embodiment, the second supporting column 21 is a telescopic supporting column, the length of the second supporting column 21 is adjustable, and the distance between the device to be tested 80 or the standard device 70 and the base reference point can be adjusted by adjusting the telescopic state of the second supporting column 21, and the position alignment between the standard device 70 and the testing device 60 is realized by combining the calibration device 30.

And the third support column 11 and the second support column 21 are all telescopic support columns.

In this embodiment, the first support column 11 is a telescoping support column, and the second support column 21 is also a telescoping support column.

The telescopic states of the first support column 11 and the second support column 21 can be adjusted simultaneously, and the calibration device 30 is combined to achieve the position alignment of the standard device 70 and the test device 60.

In some embodiments, the second clamp 23 is plural.

The second clamps 23 can be movably mounted on the second support column 21 by fasteners, screws, or snaps.

The plurality of second jigs 23 may be different in kind to hold different forms of devices under test 80.

As shown in fig. 1, a specific embodiment is described below.

Two second clamps 23 are mounted on the second support column 21.

The second clamp 23 located above has a mechanical arm at the front end, and can freely grab and fix the device 80 to be tested, and the second clamp 23 is suitable for clamping the slender device 80 to be tested, such as a recording pen or a scanning pen.

The second fixture 23 located below has a tray for carrying the device 80 to be tested, and two or more than two abutting plates are arranged on the tray, the abutting plates clamp the device 80 to be tested from the front and the back of the device 80 to be tested, and the second fixture 23 is suitable for clamping the device 80 to be tested which is rectangular and thin, such as a flat plate, a learning machine or a mobile phone.

Of course, in other embodiments, the type of the second clamp 23 may be determined according to actual needs, and the embodiment of the utility model is not limited thereto.

The second supporting columns 21 are provided with the second clamps 23, so that the device under test 80 in different forms can be tested, and the application range of the acoustic test fixture is widened.

In some embodiments, the second clamp 23 includes a sliding seat and a clamping portion, which are connected.

The sliding seat is a part of the second clamp 23 connected with the second support column 21, and the sliding seat is movably installed on the second support column 21 along the length direction of the second support column 21, that is, the second clamp 23 can move up and down along the length direction of the second support column 21 of the sliding seat, and is installed at different positions on the second support column 21

The second support column 21 is located to the sliding seat cover, and movably installs on second support column 21 through connection modes such as fastener connection, threaded connection or buckle connection, can be on second support column 21 different positions firm installation.

The clamping portion is used for clamping the device 80 to be tested, the clamping portion may include a first clamping portion and a second clamping portion, and the device 80 to be tested is suitable for being clamped between the first clamping portion and the second clamping portion.

The clamping range of the first clamping part and the second clamping part can be adjusted to match the width or height of the equipment 80 to be tested, such as a recording pen, a scanning pen, a tablet, a learning machine or a mobile phone, so as to realize stable clamping of the equipment 80 to be tested.

Two specific embodiments are described below, as shown in fig. 1.

The clamping portion of the second fixture 23 located above is a mechanical arm structure, and the first clamping portion and the second clamping portion are respectively a first clamping arm and a second clamping arm, which can freely grab and fix the device 80 to be tested, and are suitable for clamping the elongated device 80 to be tested, such as a recording pen or a scanning pen.

The clamping part of the second clamp 23 positioned below is a combined structure of a tray and a stop plate, and the first clamping part and the second clamping part are respectively a first stop plate and a second stop plate.

The tray of the holding portion holds the device 80 to be tested, and the first abutting plate and the second abutting plate hold the device 80 to be tested from the front and the back of the device 80 to be tested, and are suitable for holding the device 80 to be tested which is rectangular and thin, such as a flat board, a learning machine or a mobile phone.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. An acoustic test rack, comprising:

a base;

a second support post mounted to the base;

2. The acoustic test stand of claim 1, wherein the calibration device is mounted to both the first mounting bracket and the first clamp.

3. The acoustic test rack of claim 1, wherein the base comprises: a mounting seat and a slide rail;

the mounting seat is connected with the slide rail;

4. The acoustic test stand of claim 3, wherein the slide rail is further provided with a scale assembly.

5. The acoustic test stand of claim 3, wherein the mount includes a first mount and a second mount, and wherein the slide rail is connected at two ends to the first mount and the second mount, respectively.

6. The acoustic test rack of any of claims 1-5, wherein the first mounting bracket comprises: a first support column and a first support table;

7. The acoustic test stand of any of claims 1-5, wherein the first clamp is movably mounted to the second support column along a length of the second support column.

8. The acoustic test rack of claim 6,

the first support column is a telescopic support column;

and/or the second support column is a telescopic support column.

9. The acoustic test stand of any of claims 1-5, wherein the second clamp is a plurality.

10. The acoustic test stand of any of claims 1-5, wherein the second clamp comprises: the sliding seat is connected with the clamping part;

the clamping part is used for clamping the equipment to be tested.