CN212433214U - Test fixture and test device - Google Patents

Abstract

The utility model discloses a test fixture, which comprises a shell, a fixed cavity, a power device and a coaxial connector for connecting a test instrument; the fixed cavity is provided with at least two installation parts for arranging the to-be-tested piece, the fixed cavity is arranged in the shell, the shell is provided with a conductive piece and a grounding cover, the conductive piece and the grounding cover are used for simultaneously contacting the same to-be-tested piece, the conductive piece is connected with a central pin of the coaxial connector, and the grounding cover is connected with a grounding pin of the coaxial connector; the power device is used for driving the fixed cavity and the shell to move relatively, so that the piece to be tested is sequentially subjected to contact test. The utility model provides a piece that awaits measuring need not to weld in the scheme use, through fixed cavity and casing relative activity, can guarantee electrically conductive piece, ground connection lid and the effective contact of the piece that awaits measuring, improves the installation effectiveness, is favorable to guaranteeing the accuracy nature of testing result.

Description

Test fixture and test device

Technical Field

The utility model relates to a test technical field, more specifically say, relate to a test fixture. Furthermore, the utility model discloses still relate to a testing arrangement including above-mentioned test fixture.

Background

Ideally, the capacitor has no resistance and inductance, but in practical cases, the capacitor usually has an equivalent series resistance and an equivalent series inductance, which generate impedance and inductive reactance respectively when in use. Because the equivalent series resistance and the equivalent series inductance have a large influence on the high-frequency characteristics of the capacitor, the RLC series model analysis is usually performed on the equivalent series resistance, the equivalent series inductance, and the capacitor.

The RLC series model is the basis of power integrity simulation, and whether the equivalent series resistance and the equivalent series inductance are accurate directly influences the accuracy and precision of the power integrity simulation.

The capacitor is welded on the test fixture in the test of the capacitor parameters, after the capacitor is tested, the tested capacitor needs to be taken down and another capacitor needs to be welded, the process is more complicated, the efficiency is low, in addition, due to the possibility of welding by multiple times and different personnel, the accuracy of the test result is easily affected, and the precision of the test result is low.

In summary, how to provide a test fixture with convenient operation and less artificial influence is a problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a test fixture, this anchor clamps are used for supplementary parameter test to the piece that awaits measuring, need not to weld the piece that awaits measuring in the testing process, and convenient operation, artificial influence are little, and the degree of accuracy is high.

Another object of the utility model is to provide a testing arrangement including above-mentioned test fixture.

In order to achieve the above object, the present invention provides the following technical solutions:

a test fixture comprises a shell, a fixed cavity, a power device and a coaxial connector for connecting a test instrument;

the fixed cavity is provided with at least two installation parts for arranging a to-be-tested piece, the fixed cavity is arranged in the shell, the shell is provided with a conductive piece and a grounding cover, the conductive piece and the grounding cover are used for simultaneously contacting the same to-be-tested piece, the conductive piece is connected with a central pin of the coaxial connector, and the grounding cover is connected with a grounding pin of the coaxial connector;

the power device is used for driving the fixed cavity and the shell to move relatively, so that the piece to be tested is sequentially subjected to contact test.

Optionally, the housing includes an annular housing, the fixed cavity includes an annular structure, and the power device drives the fixed cavity to rotate relative to the annular housing.

Optionally, the casing includes an inner ring plate and an outer ring plate that are fixed relatively, the fixed cavity is embedded between the inner ring plate and the outer ring plate, one of the inner ring plate and the outer ring plate is provided with the conductive member, and the other is provided with the ground cover.

Optionally, the mounting portion includes a mounting groove; the fixed cavity comprises two annular plates which are arranged side by side, a plurality of isolation plates are arranged between the two annular plates, an installation groove is formed between every two adjacent isolation plates, and the to-be-tested piece which is inserted into the installation groove along the radial direction of the fixed cavity is radially limited by the inner annular plate and the outer annular plate.

Optionally, a cover plate for preventing the fixing cavity from moving out in the axial direction is arranged on one side end face of the inner ring plate and one side end face of the outer ring plate.

Optionally, the number of the coaxial connectors is at least two, one of the coaxial connectors is disposed on the cover plate, and the other of the coaxial connectors is disposed on the end surface of the other side of the inner ring plate and the end surface of the other side of the outer ring plate.

Optionally, the housing, the cover plate and the fixed cavity are all insulating parts.

Optionally, the inner ring plate is provided with a first notch, and the conductive piece is arranged in the first notch;

the outer ring plate is provided with a second notch, and the grounding cover is arranged in the second notch.

Optionally, the casing includes a long strip-shaped casing, the fixed cavity includes a long strip-shaped structure, and the power device drives the fixed cavity to move along the length direction of the casing.

A test device comprises a test instrument and a clamp, wherein the test instrument comprises a vector network analyzer, the clamp is the test clamp, and a coaxial cable of a coaxial connector is connected with the vector network analyzer.

Optionally, the power device and the vector network analyzer are both connected to a controller, and the controller is configured to control the power device to operate after receiving data of measured parameters sent by the vector network analyzer.

Use the utility model provides a during the scheme, with a plurality of awaiting measuring set up in fixed cavity, will electrically conduct the piece and the ground connection lid sets up in the casing to through the fixed cavity of power device control and casing relative activity, so that electrically conduct the piece that awaits measuring is connected with the contact of ground connection lid, thereby realize awaiting measuring fixed.

Compare with the fixed welding of the piece that awaits measuring in the background art in the specific position, the setting process of the piece that awaits measuring need not to weld in the scheme that this application provided, and fixed cavity and casing relative activity can improve the installation effectiveness when guaranteeing with the effective contact of the piece that awaits measuring to because need not many times welding and dismouting, be favorable to guaranteeing the accuracy nature of testing result.

The utility model also provides a testing arrangement including above-mentioned test fixture.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present invention, the drawings required to be used in the description of the embodiments or the background art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is an exploded view of a test fixture provided by the present invention;

fig. 2 is a schematic structural diagram of the test fixture provided by the present invention;

fig. 3 is a schematic diagram of the testing apparatus provided by the present invention.

In fig. 1 to 3:

1 is a coaxial connector, 11 is a central pin, 12 is a grounding pin, 2 is a cover plate, 3 is a fixed cavity, 31 is an annular plate, 32 is an isolation plate, 4 is a conductive piece, 5 is a grounding cover, 6 is a shell, 61 is an inner ring plate, 62 is an outer ring plate, 63 is a first notch, 64 is a second notch, 7 is a power device, and 8 is a fixed connecting plate;

10 is a test fixture, 20 is a vector network analyzer, and 30 is a coaxial cable.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The core of the utility model is to provide a test fixture, this anchor clamps are used for supplementary setting and the adjustment to the piece that awaits measuring in to the piece parameter test process that awaits measuring, need not to weld the piece that awaits measuring in the test procedure for the test procedure is convenient, artificial influence is little and the degree of accuracy is high.

The other core of the utility model is to provide a testing arrangement including above-mentioned test fixture.

Referring to fig. 1 to 3, fig. 1 is an exploded view of a test fixture according to the present invention; fig. 2 is a schematic structural diagram of the test fixture provided by the present invention; fig. 3 is a schematic diagram of the testing apparatus provided by the present invention.

The application provides a test fixture, can be used for the installation to the piece that awaits measuring, the piece that awaits measuring in this application can be electric capacity, perhaps be other types's device under test. The test fixture comprises a housing 6, a fixed cavity 3, a power device 7 and a coaxial connector 1 for connecting a test instrument.

Fixed cavity 3 is equipped with two at least installation departments that are used for setting up the piece that awaits measuring, and fixed cavity 3 is located in casing 6, and casing 6 is equipped with electrically conductive 4 and ground connection lid 5, and electrically conductive 4 is used for contacting same piece that awaits measuring simultaneously with ground connection lid 5, and electrically conductive 4 is connected with coaxial connector 1's central pin 11, and ground connection lid 5 is connected with coaxial connector 1's ground pin 12.

The power device 7 is used for driving the fixed cavity 3 and the shell 6 to move relatively, so that the pieces to be tested are sequentially subjected to contact test.

Specifically, the fixed cavity 3 is used for mounting a to-be-tested member, i.e., a capacitor, and is provided with at least two mounting portions for mounting different to-be-tested members respectively. The mode that sets up the piece that awaits measuring on the installation department is various, and the installation department can be the groove body structure to the piece that awaits measuring inserts wherein, perhaps the installation department sets up the clip, makes things convenient for the centre gripping piece that awaits measuring. It should be noted that the to-be-tested object in the present application is not required to be fixed by welding.

The conductive member 4 and the grounding cover 5 on the housing 6 are both used for contacting the to-be-tested member, and preferably contact both ends of the to-be-tested member, so as to perform the contact test of the to-be-tested member, and in order to be able to contact the same to-be-tested member, the positions of the conductive member 4 and the grounding cover 5 are closely arranged, and preferably, in order to be able to contact both ends of the to-be-tested member, the conductive member 4 and the grounding cover 5 are respectively arranged on both sides of.

The coaxial connector 1 includes a connector for connecting a test instrument, and plays a role of transmitting an electrical signal, and there are usually SMA connectors and the like. The center pin 11 of the coaxial connector 1 is connected with the conductive piece 4, and the grounding pin 12 of the coaxial connector 1 is connected with the grounding cover 5, so that the center pin 11 and the grounding pin 12 of the coaxial connector 1 are both connected with the piece to be tested. Alternatively, the conductive member 4 may be a conductive metal member, such as a copper sheet.

The fixed cavity 3 is installed in the shell 6 and can move relative to the shell 6, and in the moving process, the installation part on the fixed cavity 3 can move to the position where the part to be measured in the fixed cavity contacts with the conductive piece 4 and the grounding cover 5 in sequence. The power device 7 controls the fixed cavity 3 to perform the above movement.

Optionally, the power device 7 may drive one of the fixed cavity 3 and the housing 6 to move, may drive the fixed cavity 3, or may drive the housing 6, for example, the fixed cavity 3 is disposed on the first shelf, the housing 6 is movably disposed on the second shelf, and the fixed cavity 3 is inserted into the housing 6, so that the power device 7 may drive the housing 6 to move, and the housing 6 and the fixed cavity 3 may move relatively.

When using the test fixture that this application provided, at first with the piece setting that awaits measuring at the installation department of fixed cavity 3, set up fixed cavity 3 in casing 6, then through power device 7 control fixed cavity 3 and casing 6 relative activity to make the piece that awaits measuring of installation department move in proper order to the position of butt joint electrically conductive 4, also be the position of butt joint ground cover 5 simultaneously, make the test instrument who is connected with coaxial connector 1 can detect all pieces that await measuring in proper order.

This application awaits measuring a plurality of and sets up on fixed cavity 3, will electrically conductive 4 and ground connection lid 5 set up on casing 6 to through power device 7 control fixed cavity 3 and casing 6 relative activity, so that electrically conductive 4 and ground connection lid 5 are connected with the different awaiting measuring piece in proper order, thereby realize measuring. Compare with the fixed welding of the piece that will await measuring in the background art at fixed position, the scheme that this application provided can carry out the test of a plurality of pieces that await measuring through a conductive piece 4 and a ground connection lid 5, after a piece that awaits measuring is accomplished in the test, need not carry out the dismouting to the piece that awaits measuring, also need not to weld, improved efficiency of software testing, avoided a lot of dismouting process to lead to the test inaccurate simultaneously, guaranteed the accuracy nature of testing result, moreover, the steam generator is simple in structure, and the design cost is low.

In the above embodiment, the shapes and structures of the housing 6 and the fixed cavity 3 are not limited, and it can be known that the two may be implemented in various ways, for example, the housing 6 is a strip-shaped housing, the conductive component 4 and the grounding cover 5 are respectively disposed on two sides of the housing 6 along the width direction, the fixed cavity 3 is also a strip-shaped structure and is disposed inside the housing 6, a plurality of mounting portions are disposed on the fixed cavity 3 along the length direction, and the fixed cavity 3 can move relative to the housing 6 along the length direction under the control of the power device 7, so that the conductive component 4 and the grounding cover 5 contact the to-be-tested components disposed on different mounting portions.

However, the structure has a long structure in the length direction, and most of the structure can not be utilized when in use, so that the shell 6 is arranged into an annular shell, the fixed cavity 3 is arranged into an annular structure, and the power device 7 drives the fixed cavity 3 to rotate relative to the annular shell.

The casing 6 is annular, which means that the casing 6 has an annular inner cavity and can accommodate an annular structure, and a plurality of mounting parts on the fixed cavity 3 are sequentially arranged along the annular structure. Optionally, the mounting portions are uniformly arranged along the outer circumferential surface of the fixing cavity 3. Correspondingly, the conductive member 4 and the grounding cover 5 are disposed at two opposite positions on the housing.

Owing to adopt annular cooperation structure for a plurality of installation department sets up along circumference, thereby has promoted fixed cavity 3's utilization space greatly, and has avoided having the position that can't utilize on the casing 6, and casing 6 rigidity, the rigidity of electrically conductive 4 and ground connection lid 5 on it makes the testing result more accurate.

Optionally, the annular inner cavity and the annular structure may be circular tube ring structures with circular cross sections, and the cross section direction is perpendicular to the plane of the annular structure. For more stable arrangement, a ring structure with a rectangular or fan-shaped cross section can also be adopted, and the cutting direction refers to the direction perpendicular to the plane of the ring.

Specifically, on the basis of the above embodiment, the housing 6 includes the inner ring plate 61 and the outer ring plate 62 which are relatively fixed, the fixed cavity 3 is embedded and disposed between the inner ring plate 61 and the outer ring plate 62, one of the inner ring plate 61 and the outer ring plate 62 is provided with the conductive member 4, and the other is provided with the ground cover 5.

It should be noted that the relative fixation between the inner ring plate 61 and the outer ring plate 62 can be achieved by side plates connected to the end faces of the two plates, or by other brackets.

Alternatively, the housing 6 comprises two circular side plates arranged in parallel, for example, a wheel structure of a waterwheel, one of the two circular side plates is provided with the conductive member 4, and the other is provided with the grounding cover 5. Correspondingly, the component to be tested is inserted into the fixing cavity 3 along the axial direction of the fixing cavity 3, and the conducting component 4 and the grounding cover 5 need to be contacted at two axial ends.

On the basis of the embodiment that the conductive member 4 is disposed on the inner ring plate 61 or the outer ring plate 62, the mounting portion is specifically a mounting groove; fixed cavity 3 is equipped with a plurality of between two annular plate 31 including two annular plate 31 that set up side by side, two annular plate 31 and keeps apart plate 32, forms the mounting groove between the isolation plate 32 of adjacent setting, and the piece that awaits measuring that radially inserts the mounting groove along fixed cavity 3 forms radially spacingly by interior crown plate 61 and outer crown plate 62.

It should be noted that, the fixed cavity 3 is similar to a waterwheel wheel structure, the isolation plate 32 extends along the radial direction, and the fixed cavity 3 is divided in the circumferential direction to form a plurality of groove bodies for placing the pieces to be measured.

In this embodiment, the piece that awaits measuring can realize spacingly through interior crown plate 61 and outer crown plate 62, avoids breaking away from fixed cavity 3, need not to set up extra limit structure at fixed cavity 3, consequently can save the design cost of fixed cavity 3 to guarantee the stability of the piece that awaits measuring.

On the basis of the above embodiment, one side end surfaces of the inner ring plate 61 and the outer ring plate 62 are provided with the cover plate 2 for preventing the fixed chamber 3 from moving out in the axial direction.

Referring to fig. 1, the cover plate 2 is fixedly disposed on one side of the inner ring plate 61 and one side of the outer ring plate 62, and may be clamped and fixed by the coaxial connector 1, or may be fixed by other means.

Alternatively, a fixed connecting plate 8 is provided on the other end surface of the inner ring plate 61 and the outer ring plate 62, that is, on the side opposite to the cover plate 2, so that a limit is formed on the side end surface to the fixed cavity 3, which is engaged with the cover plate 2, in both directions in the axial direction.

In addition to the above embodiment, the number of the coaxial connectors 1 is at least two, one coaxial connector 1 is provided on the cover plate 2, and the other coaxial connector 1 is provided on the other end surfaces of the inner ring plate 61 and the outer ring plate 61.

It should be noted that center pins 11 of two coaxial connectors 1 are connected to conductive member 4, and ground pins 12 of two coaxial connectors 1 are connected to ground cover 5.

Alternatively, the two coaxial connectors 1 clamp and fix the outer ring plate 62 and the cover plate 2, that is, the two coaxial connectors 1 clamp and fix the housing 6, the fixing cavity 3 and the cover plate 2.

In any of the above embodiments, the housing 6, the cover plate 2 and the fixing cavity 3 are all insulating members. In the test, the test influence on the piece to be tested caused by the formation of other conductive structures needs to be avoided, so that the fixed structures are insulators.

On the basis of any one of the above embodiments, the inner ring plate 61 is provided with a first notch 63, and the conductive member 4 is disposed in the first notch 63; the outer ring plate 62 is provided with a second notch 64, and the ground cover 5 is provided in the second notch 64.

Referring to fig. 1, the first notch 63 is connected to the end surface of the inner ring plate 61, the second notch 64 is disposed on the outer ring plate 62, and optionally, the second notch 64 is not connected to the end surface. Optionally, the scheme protected by the present application is not limited to the above-mentioned situation, and any manner that can satisfy the requirement of convenient installation belongs to the protection scope of the present application.

In the above embodiments, the power device 7 may be a motor, or other device having a power output.

It should be noted that the speed or frequency of rotation or movement of the power unit 7 can be preset to suit the use of the test instrument. Of course, the power device 7 may also be connected to a test instrument, so that after the test instrument completes the test of the current to-be-tested object, the power device 7 automatically controls the fixed cavity 3 and the housing 6 to move relatively.

Since the clamp is adapted to the testing apparatus, the clamp may be specifically configured according to the type and the operation mode of the testing apparatus, and is not specifically limited in this embodiment.

In any of the above embodiments, the mounting groove of the fixing cavity 3 may be a card slot matched with the to-be-tested member, and each card slot may have a unique package number, so as to perform unique identification and differentiation during use.

Except the main structure and the connection relation of the test fixture that each above-mentioned embodiment provided, the utility model discloses still provide a testing arrangement including the test fixture that the above-mentioned embodiment disclosed, testing arrangement include above-mentioned test fixture and the vector network analyzer 20 of being connected with the test fixture, the vector network analyzer 20 is connected to coaxial cable 30 of coaxial connector 1. The vector network analyzer 20 is configured to obtain parameters of a to-be-tested device, and the structure of other parts of the vector network analyzer 20 is referred to in the background art and is not described herein again.

The vector network analyzer 20 is connected with the coaxial connector 1, and the coaxial connector 1 is connected with the to-be-tested element through the grounding cover 5 and the conductive element 4 to form a two-port test network, so that the vector network analyzer 20 can obtain parameters of the to-be-tested element.

In a specific embodiment, the power plant 7 and the vector network analyzer 20 are both connected to a controller for controlling the power plant to operate upon receiving the measured parameter data from the vector network analyzer 20.

Specifically, can put into the mounting groove of fixed cavity 3 with the piece that awaits measuring during the use to buckle ground connection lid 5. The coaxial cable 30 of the coaxial connector 1 is connected to the vector network analyzer 20 to test a to-be-tested piece contacted with the current conductive piece 4, then the vector network analyzer 20 stores the measured related S parameter of the to-be-tested piece and then sends the S parameter to the controller, or the S parameter is stored by the controller, the power device can automatically control the fixed cavity 3 to move, so that the next to-be-tested piece to be tested rotates to the position of the conductive piece 4, and the vector network analyzer 20 performs next test. Taking the capacitor to be tested as an example, the controller may be used to obtain three parameters of ESR, ESL, and ESC of the capacitor to be tested according to the obtained S parameter through a correlation algorithm. It should be noted that the steps and methods performed by the vector network analyzer 20 after measuring the parameters can be implemented in various ways in the background art, and reference may be made to the background art. The controller may be a control structure such as a control chip.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

It is right above the utility model provides a test fixture and testing arrangement have carried out the detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (11)

1. A test fixture is characterized by comprising a shell (6), a fixed cavity (3), a power device (7) and a coaxial connector (1) for connecting a test instrument;

the fixing cavity (3) is provided with at least two installation parts for arranging a to-be-tested piece, the fixing cavity (3) is arranged in the shell (6), the shell (6) is provided with a conductive piece (4) and a grounding cover (5), the conductive piece (4) and the grounding cover (5) are used for simultaneously contacting the same to-be-tested piece, the conductive piece (4) is connected with a central pin (11) of the coaxial connector (1), and the grounding cover (5) is connected with a grounding pin (12) of the coaxial connector (1);

the power device (7) is used for driving the fixed cavity (3) and the shell (6) to move relatively, so that the piece to be tested is sequentially subjected to contact test.

2. Test fixture according to claim 1, wherein the housing (6) comprises an annular housing and the stationary chamber (3) comprises an annular structure, the power means (7) driving the stationary chamber (3) in rotation relative to the annular housing.

3. The test fixture according to claim 2, wherein the housing (6) comprises an inner ring plate (61) and an outer ring plate (62) which are relatively fixed, the fixing cavity (3) is embedded between the inner ring plate (61) and the outer ring plate (62), one of the inner ring plate (61) and the outer ring plate (62) is provided with the conductive member (4), and the other is provided with the grounding cap (5).

4. The test fixture of claim 3, wherein the mounting portion includes a mounting slot; the fixed cavity (3) comprises two annular plates (31) which are arranged in parallel, a plurality of isolation plates (32) are arranged between the two annular plates (31), an installation groove is formed between every two adjacent isolation plates (32), and a to-be-tested piece which is inserted into the installation groove along the radial direction of the fixed cavity (3) is radially limited by the inner annular plate (61) and the outer annular plate (62).

5. Test fixture according to claim 4, characterized in that one side end face of the inner ring plate (61) and the outer ring plate (62) is provided with a cover plate (2) for preventing the fixing cavity (3) from moving out in the axial direction.

6. The test fixture according to claim 5, wherein the number of the coaxial connectors (1) is at least two, one of the coaxial connectors (1) is provided on the cover plate (2), and the other of the coaxial connectors (1) is provided on the other end surfaces of the inner ring plate (61) and the outer ring plate (62).

7. Test fixture according to claim 5, characterized in that the housing (6), the cover plate (2) and the fixing cavity (3) are all insulating pieces.

8. Test fixture according to any one of claims 3 to 7, wherein said inner ring plate (61) is provided with a first notch (63), said electrically conductive member (4) being provided in said first notch (63);

the outer ring plate (62) is provided with a second notch (64), and the grounding cover (5) is arranged in the second notch (64).

9. Test fixture according to claim 1, wherein the housing (6) comprises an elongated housing, the stationary chamber (3) comprises an elongated structure, and the power means (7) is adapted to drive the stationary chamber (3) to move along the length of the housing (6).

10. A test apparatus comprising a test instrument and a fixture, characterized in that the test instrument comprises a vector network analyzer (20), the fixture being a test fixture (10) according to any one of claims 1-9, the coaxial cable (30) of the coaxial connector (1) being connected to the vector network analyzer (20).

11. The testing device according to claim 10, wherein the power unit (7) and the vector network analyzer (20) are connected to a controller for controlling the operation of the power unit (7) upon receiving measured parameter data sent by the vector network analyzer (20).

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