CN221099951U - Sensor testing device - Google Patents

Abstract

The application relates to a sensor testing device, comprising: the test box body is provided with a closed test cavity; the product seat is arranged in the test cavity; the surface of the product seat is provided with a plurality of fixing parts which are arranged along a first direction; the positioning plates are distributed on the product seat at intervals along the first direction and are detachably connected with the corresponding fixing parts; each positioning plate is provided with a mounting groove for fixedly mounting the sensor; and a plurality of cover plates are detachably covered on the corresponding positioning plates, each cover plate is provided with a through communication hole, and the communication holes are communicated with the test cavity and the mounting groove. The sensor testing device provided by the embodiment of the application has the advantages of strong universality and low cost.

Description

Sensor testing device

Technical Field

The application relates to the technical field of package testing, in particular to a sensor testing device.

Background

The pressure sensor (PressureTransducer) is a device or apparatus that senses the pressure signal and converts the pressure signal to a usable output electrical signal according to a certain rule. Pressure sensors are generally composed of a pressure sensitive element and a signal processing unit. Pressure sensors can be classified into gauge pressure sensors, differential pressure sensors, and absolute pressure sensors, according to the type of test pressure. The pressure sensor is the most commonly used sensor in industrial practice, is widely applied to various industrial self-control environments, and relates to various industries such as water conservancy and hydropower, railway traffic, intelligent building, production self-control, aerospace, military industry, petrochemical industry, oil well, electric power, ships, machine tools, pipelines and the like. With the development of technology, pressure sensors using microelectromechanical systems (MEMS) are commercially available. Compared with the traditional pressure sensor, the MEMS pressure sensor has the characteristics of small volume, light weight, low cost, low power consumption, high reliability, suitability for mass production, easy integration, realization of intellectualization and the like.

In the related art, the size of the MEMS pressure sensor is smaller and smaller, the functions are diversified, manufacturers for producing the MEMS pressure sensor in China are more and more, each manufacturer is customized in size and pin definition, so that the testing device is required to be provided with a plurality of sets, the universality is low, and a plurality of sets of testing devices are processed at the early stage of developing the MEMS pressure sensor, so that a large amount of funds and sites are occupied.

Disclosure of Invention

Based on this, it is necessary to provide a sensor testing device against the problem of poor versatility.

A first aspect of the present application provides a sensor testing apparatus comprising: the test box body is provided with a closed test cavity; the product seat is arranged in the test cavity; the surface of the product seat is provided with a plurality of fixing parts which are arranged along a first direction; the positioning plates are distributed on the product seat at intervals along the first direction and are detachably connected with the corresponding fixing parts; each positioning plate is provided with a mounting groove for fixedly mounting the sensor; and a plurality of cover plates are detachably covered on the corresponding positioning plates, each cover plate is provided with a through communication hole, and the communication holes are communicated with the test cavity and the mounting groove.

In one embodiment, the positioning plate is formed with a plurality of mounting grooves, and all the mounting grooves on each positioning plate are arranged at intervals along the second direction; the cover plates are provided with a plurality of communication holes, the communication holes of the mounting grooves are in one-to-one correspondence, and all the communication holes on each cover plate are arranged at intervals along the second direction; the first direction and the second direction are intersected.

In one embodiment, the fixing portion is a convex column, and positioning holes adapted to the fixing portion are formed at two ends of the positioning plate along the second direction.

In one embodiment, a penetrating pin hole is formed in the product seat in a region corresponding to the mounting groove; the bottom side surface of the product seat and the bottom wall of the test box body jointly define a semi-closed first subchamber; pins of a sensor mounted in the mounting slot can pass down through the pin holes and extend into the first subchamber.

In one embodiment, a top side of the product holder and a top wall of the test case together define a second subchamber; the cover plate is provided with a plurality of first through holes which penetrate through, the positioning plate is provided with a plurality of second through holes which penetrate through, and the product seat is provided with a plurality of third through holes which penetrate through; each first communication hole and the corresponding second communication hole and the corresponding third communication hole are connected to form a sub-air passage for communicating the first sub-cavity and the second sub-cavity.

In one embodiment, the sensor testing device includes a lead plug, a wire slot is formed on a peripheral side wall surface of the testing box body corresponding to the first subcavity, and the lead plug is disposed in the wire slot.

In one embodiment, the test case includes a base and an upper cover; the top end of the base is provided with an opening, and the upper cover sealing cover is arranged on the opening of the test cavity.

In one embodiment, the upper cover is formed with a flow hole for communicating the test cavity with the outside.

In one embodiment, the test case includes a handle detachably disposed on a top surface of the upper cover facing away from the test cavity.

In one embodiment, the test box body comprises a sealing ring, a sealing groove surrounding the opening is formed on the top end wall surface of the base, and the sealing ring is arranged in the sealing groove.

The beneficial effects are that:

according to the sensor testing device, the testing box body, the product seat, the positioning plates and the cover plates are arranged, the testing box body is provided with the closed testing cavity, the product seat is arranged in the testing cavity, the sensors are fixed in the mounting grooves of the positioning plates, each positioning plate is detachably connected with the corresponding fixing part, the cover plates are detachably covered on the corresponding positioning plates, the mounting grooves of the different positioning plates can correspond to different sensors, the sensors are convenient to place, the communication holes on the different cover plates can correspond to the different sensors, so that the upper detection part of the sensors is exposed, and when other types of sensors need to be detected, only the different positioning plates and the cover plates need to be replaced independently, and a new sensor testing device does not need to be developed again, so that the universality is effectively enhanced, and the cost of sensor detection and development is reduced.

Drawings

FIG. 1 is an exploded view of a sensor testing apparatus provided in some embodiments of the present application.

FIG. 2 is a side view of a sensor testing apparatus provided in some embodiments of the application.

FIG. 3 is a cross-sectional view A-A of the sensor testing apparatus shown in FIG. 2.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of the embodiments of the present application, these terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying any particular importance or order of number of features, particular order, or order of primary or secondary relationships of such features.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the terms "plurality" and "a plurality" mean at least two (including two), such as two, three, etc., unless specifically defined otherwise. Similarly, the terms "plurality of sets" and "plurality of sets" when present refer to more than two sets (including two sets), and the terms "plurality of sheets" when present refer to more than two sheets (including two sheets).

In the description of the embodiments of the present application, if there are such terms as "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counter-clockwise", "axial", "radial", "circumferential", etc., these terms refer to an orientation or positional relationship based on that shown in the drawings, for convenience of description and simplicity of description only, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In describing embodiments of the present application, unless otherwise explicitly indicated and limited thereto, the terms "mounted," "connected," "secured," and the like should be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

A first aspect of the present application provides a sensor testing apparatus for testing a batch of different models of sensors 90.

Referring to fig. 1 to 3, the sensor testing apparatus includes: test case 10, product holder 20, plurality of positioning plates 30, and plurality of cover plates 40.

Wherein the test housing 10 has a closed test chamber 11.

The test cassette 10 may take a variety of configurations. In some embodiments, the test case 10 may include a base 17 and an upper cover 70; the top end of the base 17 is provided with an opening 12, and an upper cover 70 is hermetically arranged on the opening 12 of the test cavity 11. The base 17 and the upper cover 70 together define a test chamber 11 for housing the sensor 90. The base 17 may have a hollow structure with an opening at one end, and the upper cover 70 may have a plate-shaped structure, where the upper cover 70 covers the opening side of the base 17, so that the base 17 and the upper cover 70 together define the test cavity 11; the base 17 and the upper cover 70 may be hollow structures each having one side open, and the open side of the upper cover 70 is closed to the open side of the base 17. Of course, the test case 10 formed by the base 17 and the upper cover 70 may have various shapes, for example, a simple three-dimensional structure such as a single rectangular parallelepiped or a cylinder or a sphere, or a complex three-dimensional structure formed by combining simple three-dimensional structures such as a rectangular parallelepiped or a cylinder or a sphere, which is not limited in the embodiment of the present application. The material of the test case 10 may be an alloy material such as carbon steel, aluminum alloy, or iron alloy, or a polymer material such as ABS plastic or polyethylene plastic, which is not limited in the embodiment of the present application.

A product holder 20 is arranged in the test chamber 11. The product holder 20 may take a variety of configurations. In some embodiments, the product holder 20 has a plate-like structure, and the test case 10 may have a support column (not shown) for supporting the product holder 20 therein, or may be directly connected and fixed to the product holder 20 through a side wall of the test case 10. The product holder 20 may be of various shapes, such as, but not limited to, rectangular, circular, or other polygonal configurations. The material of the product seat 20 may be an alloy material such as carbon steel, aluminum alloy, or iron alloy, or a polymer material such as ABS plastic or polyethylene plastic, which is not limited in the embodiment of the present application.

The surface of the product holder 20 is formed with a plurality of fixing portions 21 arranged in the first direction X; all the positioning plates 30 are arranged on the product seat 20 at intervals along the first direction X and are detachably connected with the corresponding fixing parts 21; each positioning plate 30 is formed with a mounting groove 31 for fixedly mounting the sensor 90; the cover plates 40 are detachably covered on the corresponding positioning plates 30, and each cover plate 40 is provided with a through communication hole 41, and the communication holes 41 are communicated with the test cavity 11 and the mounting groove 31.

When the air pressure in the test chamber 11 is adjusted, the air pressure in the mounting groove 31 is changed by the communication of the communication hole 41, and the sensor 90 senses the change of the external pressure and outputs a corresponding electric signal, thereby completing the test of the sensor 90.

In the sensor testing device, the sensors 90 are fixed in the mounting grooves 31 of the positioning plates 30, each positioning plate 30 is detachably connected with the corresponding fixing portion 21, the cover plate 40 is detachably covered on the corresponding positioning plate 30, the mounting grooves 31 of the different positioning plates 30 can correspond to the different sensors 90, the sensor testing device is convenient to place, the communication holes 41 on the different cover plates 40 can correspond to the different sensors 90, so that the detection upper parts (such as detection air holes of the pressure sensors) of the sensors 90 are exposed, and when other types of sensors 90 need to be detected, only the different positioning plates 30 and the corresponding cover plates 40 need to be replaced independently, and a new sensor testing device does not need to be developed again, so that the universality is effectively enhanced, and the cost of sensor detection and development is reduced.

Alternatively, the positioning plate 30 and the cover plate 40 may be elongated plate structures, or may be other shapes, such as triangle, circle, etc. The material of the positioning plate 30 and the cover plate 40 may be an alloy material such as carbon steel, aluminum alloy, or iron alloy, or a polymer material such as ABS plastic or polyethylene plastic, which is not limited in the embodiment of the present application.

In some possible embodiments, referring to fig. 1 to 3, a plurality of mounting grooves 31 are formed on the positioning plate 30, and all the mounting grooves 31 on each positioning plate 30 are arranged at intervals along the second direction Y. The cover plates 40 are formed with a plurality of communication holes 41, the communication holes 41 of the mounting grooves 31 are in one-to-one correspondence, and all the communication holes 41 on each cover plate 40 are arranged at intervals along the second direction Y. The first direction X is intersected with the second direction Y; the first direction X is generally perpendicular to the second direction Y.

Since the types of the sensors 90 are large and small, the number is large. A plurality of mounting slots 31 of the same type may be simultaneously designed on one positioning plate 30 and arranged at intervals along the second direction, and a plurality of communication holes 41 are correspondingly designed on the corresponding cover plate 40, so that the mounting test of a plurality of sensors 90 of the same type can be simultaneously satisfied. Different locating plates 30 and cover plates 40 can be arranged on the product seat 20 according to requirements in the test box body 10, a plurality of different sensors 90 are arranged on the different locating plates 30, and therefore the sensors 90 of different types can be detected in batches, and the detection efficiency is improved.

In some possible embodiments, referring to fig. 1 to 3, the fixing portion 21 is a convex column, and two ends of the positioning plate 30 along the second direction Y are formed with positioning holes 32 adapted to the fixing portion 21; the convenient positioning plate 30 is fixedly connected with the product seat 20, and is convenient to maintain.

The fixing part 21 can be integrally connected with the product seat 20, has a simple structure, can be divided into two parts and connected in a bolt connection mode, and is more flexible to use.

In some possible embodiments, referring to fig. 1 to 3, the product holder 20 is formed with a through pin hole 22 in a region corresponding to the mounting slot 31. The bottom side surface of the product seat 20 and the bottom wall of the test box body 10 jointly define a semi-closed first subchamber 13; the pins 91 of the sensor 90 mounted in the mounting slot 31 can pass vertically downward through the pin holes 22 and extend into the first subchamber 13. When the air pressure in the test chamber 11 is adjusted, the air pressure in the mounting groove 31 is changed by the communication of the communication hole 41, the sensor 90 senses the change of the external pressure and outputs the corresponding electric signal outwards through the pin 91, thereby completing the test of the sensor 90.

In the embodiment of the present application, the first direction X may be defined as a length direction of the test case 10, and the second direction Y may be defined as a width direction of the test case 10; the thickness direction of the test box 10 is the vertical direction, and the first direction X, the second direction Y and the vertical direction are arranged in a pairwise perpendicular manner.

In some possible embodiments, referring to fig. 1-3, the top side of the product holder 20 and the top wall of the test case 10 together define a second subchamber 14; the cover plate 40 is formed with a plurality of through-holes 42, the positioning plate 30 is formed with a plurality of through-holes 33, and the product holder 20 is formed with a plurality of through-holes 23. The first communication holes 42, the second communication holes 33, and the third communication holes 23 are in one-to-one correspondence with each other, and each of the first communication holes 42, the corresponding second communication holes 33, and the corresponding third communication holes 23 are consecutive to form a sub-air passage for communicating the first sub-chamber 13 with the second sub-chamber 14.

Therefore, the first subchamber 13 and the second subchamber 14 can be communicated through the plurality of subchambers, and the air pressure in each part of the test chamber 11 can be quickly balanced, so that the test accuracy is ensured.

In some possible embodiments, referring to fig. 1 to 3, the sensor testing device includes a lead plug 50, and a wire slot 15 is formed on a peripheral side wall surface of the testing box 10 corresponding to the first sub-cavity 13, and the lead plug 50 is disposed in the wire slot 15. The outer frame of the lead plug 50 is made of plastic or metal, the outer frame wraps a plurality of conductive jacks, and when the lead plug 50 is arranged in the wire slot 15, the lead plug 50 is sealed with the wall of the wire slot 15 by adopting interference, gluing, screw connection and other modes; one end of the lead plug 50 extends into the first subchamber 13, and the bottom of each conductive socket is connected to a pin 91 of the sensor 90 via a cable, and an operator can insert the lead plug into the conductive socket outside the test case 10 by using an adapted pin to complete the circuit connection. When the air pressure in the test chamber 11 is adjusted, the sensor 90 senses the pressure change and outputs a corresponding electric signal to the conductive jack through the pin 91, thereby completing the test of the sensor 90.

Alternatively, the sensors 90 may be large and small in size and large in number. The sensor testing device may include 4 lead pins 50 respectively spaced apart on the side walls of the base 17, each lead pin 50 being capable of connecting to a plurality of sensors 90 mounted on one or more positioning plates 30, particularly as designed.

In some possible embodiments, referring to fig. 1 to 3, a flow hole 71 is formed in the upper cover 70 to communicate the test chamber 11 with the outside. An operator can be connected to the flow hole 71 through a pipeline outside the test box 10, and can pump air or exhaust air into the test cavity 11 through an air pump and other devices, so that the air pressure in the test cavity 11 is changed, the sensor 90 senses the pressure change and outputs corresponding electric signals to the conductive jack through the pin 91, and the test of the sensor 90 is completed.

In some possible embodiments, referring to fig. 1-3, the test case 10 includes a handle 60, where the handle 60 is removably disposed on a top surface of the upper cover 70 facing away from the test cavity 11. Thus, the handle 60 is convenient for an operator to hold and move the upper cover 70, so that the operation of uncovering or closing the cover is completed, the operation is convenient, the handle 60 and the upper cover 70 can be connected by bolts, the connection strength is good, and the maintenance and the replacement are convenient.

In some possible embodiments, referring to fig. 1-3, the test case 10 includes a sealing ring 18, and the sealing ring 18 may be an annular rubber ring; a seal groove 19 surrounding the opening 12 is formed in the top end wall surface of the base 17, and a seal ring 18 is provided in the seal groove 19. Typically, the cross-sectional diameter of seal ring 18 is greater than the groove depth of seal groove 19 such that seal ring 18 protrudes above the top end wall of base 17 facing upward toward cover 70; when the upper cover 70 is pressed on the base 17, the sealing ring 18 can be in sealing contact with the upper cover 70 to seal the test cavity 11, so that the pressure detection of the plurality of sensors 90 in the test cavity 11 is effectively performed, the detection error caused by the air pressure error is avoided, and the detection precision is effectively improved.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. A sensor testing device, the sensor testing device comprising:

A test box (10) having a closed test cavity (11);

A product seat (20) arranged in the test cavity (11); the surface of the product seat (20) is provided with a plurality of fixing parts (21) which are arranged along a first direction;

A plurality of positioning plates (30), wherein all the positioning plates (30) are arranged on the product seat (20) at intervals along the first direction and are detachably connected with the corresponding fixing parts (21); each positioning plate (30) is provided with a mounting groove (31) for fixedly mounting the sensor;

And a plurality of cover plates (40) detachably cover the corresponding positioning plates (30), wherein each cover plate (40) is provided with a through communication hole (41), and the communication holes (41) are communicated with the test cavity (11) and the mounting groove (31).

2. The sensor testing device according to claim 1, wherein a plurality of the mounting grooves (31) are formed on the positioning plate (30), and all the mounting grooves (31) on each positioning plate (30) are arranged at intervals along the second direction;

The cover plates (40) are provided with a plurality of communication holes (41), the communication holes (41) of the mounting grooves (31) are in one-to-one correspondence, and all the communication holes (41) on each cover plate (40) are arranged at intervals along the second direction;

The first direction and the second direction are intersected.

3. The sensor testing device according to claim 2, wherein the fixing portion (21) is a convex column, and both ends of the positioning plate (30) along the second direction are formed with positioning holes (32) adapted to the fixing portion (21).

4. A sensor testing device according to any one of claims 1 to 3, wherein the product holder (20) is formed with through-going pin holes (22) in a region corresponding to the mounting slot (31);

The bottom side surface of the product seat (20) and the bottom wall of the test box body (10) jointly define a semi-closed first subchamber (13); pins of a sensor mounted in the mounting slot (31) can pass down through the pin holes (22) and extend into the first subchamber (13).

5. The sensor testing device according to claim 4, characterized in that the top side of the product holder (20) and the top wall of the test case (10) together define a second subchamber (14);

The cover plate (40) is provided with a plurality of first through holes (42) which penetrate through, the positioning plate (30) is provided with a plurality of second through holes (33) which penetrate through, and the product seat (20) is provided with a plurality of third through holes (23) which penetrate through;

Each of the first communication holes (42), the second communication holes (33) and the third communication holes (23) are connected to form a sub-air passage for communicating the first sub-cavity (13) with the second sub-cavity (14).

6. The sensor testing device according to claim 4, characterized in that the sensor testing device comprises a lead plug (50), a wire slot hole (15) is formed in the peripheral side wall surface of the testing box body (10) corresponding to the first subcavity (13), and the lead plug (50) is arranged in the wire slot hole (15).

7. A sensor testing device according to any one of claims 1 to 3, wherein the testing housing (10) comprises a base (17) and an upper cover (70);

The top end of the base (17) is provided with an opening (12), and the upper cover (70) is sealed and arranged on the opening (12) of the test cavity (11).

8. The sensor testing device according to claim 7, wherein a flow hole (71) for communicating the test chamber (11) with the outside is formed in the upper cover (70).

9. The sensor testing device according to claim 7, wherein the testing box (10) comprises a handle (60), the handle (60) being detachably arranged on a top surface of the upper cover (70) facing away from the testing cavity (11).

10. The sensor testing device according to claim 7, wherein the testing box (10) comprises a sealing ring (18), a sealing groove (19) surrounding the opening (12) is formed on a top end wall surface of the base (17), and the sealing ring (18) is arranged in the sealing groove (19).