CN219434266U

CN219434266U - Pressure calibration device

Info

Publication number: CN219434266U
Application number: CN202320359246.2U
Authority: CN
Inventors: 孟丽君; 郭真刚; 谭昕; 姚颖康; 谢全民
Original assignee: Jianghan University
Current assignee: Jianghan University
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-07-28
Anticipated expiration: 2033-02-28

Abstract

The utility model discloses a pressure calibration device, which relates to the technical field of calibration devices and comprises a sensing assembly and a movable assembly. The sensing assembly comprises a base and a pressure sensor arranged on the base, and one side of the pressure sensor, which is opposite to the base, is provided with a contact. The movable component comprises a guide rail, an objective table and a lower pressing block, the guide rail is arranged on the base, the objective table is connected with the guide rail in a sliding manner, and the lower pressing block is arranged on one side of the objective table facing the contact; the objective table can slide along the guide rail to drive the lower pressing block to press the contact. The objective table can be used for placing the heavy object that awaits measuring, and the heavy object can exert pressure to the objective table through self gravity, and the objective table slides along the guide rail, and the objective table drives the briquetting and directly supports the pressure contact. Because the objective table is connected with the lower pressing block, the lower pressing block cannot be lost, steel balls are not required to be arranged, acting force is conducted through the steel balls, grooves are not required to be formed in the lower pressing block and the pressure sensor, and cost is saved.

Description

Pressure calibration device

Technical Field

The utility model relates to the technical field of calibration devices, in particular to a pressure calibration device.

Background

A pressure sensor is a sensor capable of converting a pressure signal into an electrical signal, and is widely used in various industries. For ease of application, pressure sensors are often associated with pressure testers or other devices to enable visual observation of the corresponding coefficients of pressure values and code values by the pressure testers or other devices. However, the existing pressure sensor calibration device has some problems, such as the pressure sensor calibration device with the publication number of CN104634508A, by grooving the pressure tester and the pressing block, the two grooves transmit the acting force through the steel ball in the middle, thus not only causing the steel ball to be easy to lose, but also increasing the cost when grooving the pressure tester and the pressing block.

Disclosure of Invention

In view of the above, it is necessary to provide a pressure calibration device, which solves the technical problems that steel balls for transmitting force are easy to lose and the cost is increased when grooves are formed in a pressure tester and a pressing block in the prior art.

In order to achieve the above technical purpose, the technical scheme of the present utility model provides a pressure calibration device, comprising:

the sensing assembly comprises a base and a pressure sensor arranged on the base, and one side of the pressure sensor, which is away from the base, is provided with a contact;

the movable assembly comprises a guide rail, an objective table and a pressing block, wherein the guide rail is arranged on the base, the objective table is connected with the guide rail in a sliding manner, and the pressing block is arranged on one side of the objective table facing the contact; the objective table can slide along the guide rail so as to drive the lower pressing block to press the contact.

Further, the lower pressing block is in a conical shape, the tip of the lower pressing block faces the contact, one end of the lower pressing block with a larger area is connected with the objective table, and the objective table can drive the tip of the lower pressing block to prop against the contact.

Further, the contact is groove-shaped, and when the tip of the lower pressing block abuts against the contact, the tip of the lower pressing block can be fully contacted with the inner wall of the contact.

Further, the pressure sensor comprises a base and a plurality of elastic sheets, wherein the base is arranged on the base, the elastic sheets are uniformly distributed around the base at equal angles, the elastic sheets are connected and converged at the center of the base, and the contact is positioned at the center of the convergence of the elastic sheets.

Further, the base is cylindrical, the planes of the elastic pieces are perpendicular to the moving direction of the lower pressing block, and the contacts are located on the straight line of the movement of the lower pressing block.

Further, the elastic piece is detachably connected to the base through a screw.

Further, the guide rail comprises a first slide rail and a second slide rail, the first slide rail is cylindrical, and the cross street surface of the second slide rail is I-shaped.

Further, the number of the first sliding rails and the number of the second sliding rails are two, the two first sliding rails are respectively located at two sides of the objective table, the two second sliding rails are respectively located at two sides of the objective table, and the two first sliding rails and the two second sliding rails are obliquely and alternately arranged.

Further, the sensing assembly further comprises a positioning piece, a first fixing groove is formed in the base, a plug groove matched with the second sliding rail is formed in the positioning piece, and after the positioning piece is plugged with the second sliding rail through the plug groove, the positioning piece and the second sliding rail can be matched and filled in the first fixing groove.

Further, the mounting holes are formed in two sides of the objective table, and the mounting holes are used for being connected with the pull ropes, so that the pull ropes drive the objective table to slide back and forth along the guide rails.

Compared with the prior art, the utility model has the beneficial effects that: the objective table that pressure calibration device included can be used to place the heavy object that awaits measuring, and the heavy object can exert pressure to the objective table through self gravity, and the objective table slides along the guide rail, and the objective table drives down the briquetting and directly supports the contact. Because the objective table is connected with the lower pressing block, the lower pressing block cannot be lost, steel balls are not required to be arranged, acting force is conducted through the steel balls, grooves are not required to be formed in the lower pressing block and the pressure sensor, and cost is saved.

In addition, the pressure sensor can be connected with the oscilloscope, the pressing contact of the pressing block can drive the pressure sensor to generate elastic deformation, and the deformation of the pressure sensor can be reflected through the oscilloscope, so that the corresponding coefficient of the pressure value of the weight and the wavelength of the oscilloscope is established, and the pressure sensor can be better applied to the corresponding field.

Drawings

FIG. 1 is a schematic diagram of a pressure calibration device when a lower pressing block presses a contact;

FIG. 2 is a schematic view of the pressure calibration device when the lower press block is not pressed against the contact;

FIG. 3 is a schematic view of a disassembled structure of the pressure calibration device;

FIG. 4 is a schematic structural view of a sensing assembly;

fig. 5 is a schematic structural view of another view of the sensing assembly.

Detailed Description

Preferred embodiments of the present utility model will now be described in detail with reference to the accompanying drawings, which form a part hereof, and together with the description serve to explain the principles of the utility model, and are not intended to limit the scope of the utility model.

Referring to fig. 1, the present utility model provides a pressure calibration device 100, the pressure calibration device 100 being connectable to an oscilloscope. When the weight 6 is placed on the pressure calibration device 100, the weight 6 presses against the pressure calibration device 100 by self gravity, so that the pressure calibration device 100 is elastically deformed, the deformation can be reflected on the oscilloscope by the wavelength, and a user can intuitively see the corresponding relation between the weight of the weight 6 and the wavelength through the wavelength value or the wavelength line on the oscilloscope, thereby being convenient for applying the pressure calibration device 100 to the corresponding field.

Referring to fig. 2, the pressure calibration device 100 includes a sensing assembly 101 and a movable assembly 102 connected to each other, and the weight 6 may be placed on the movable assembly 102, and the movable assembly 102 is pressed against the sensing assembly 101 to elastically deform the sensing assembly 101. After the sensing component 101 is connected with the oscilloscope, the oscilloscope can accurately reflect the deformation state of the sensing component 101 through the displayed wavelength.

The sensing assembly 101 includes a base 1 and a pressure sensor 2, the pressure sensor 2 being provided on a side of the base 1 facing the movable assembly 102. The pressure sensor 2 is used for connecting an oscilloscope, and when the pressure sensor 2 is propped against, the oscilloscope can reflect the deformation state of the pressure sensor 2.

Referring to fig. 3, the base 1 is provided with a first fixing groove 11 and a second fixing groove 12, and the number of the first fixing groove 11 and the second fixing groove 12 is two. The two first fixing grooves 11 are respectively located at two sides of the base 1, the two second fixing grooves 12 are respectively located at two sides of the base 1, and the two first fixing grooves 11 and the two second fixing grooves 12 are obliquely crossed.

The first fixing groove 11 is in a cuboid shape, the sensing assembly 101 further comprises a positioning piece 13, and the positioning piece 13 is provided with a plugging groove 131. The positioning piece 13 is used for being placed into the first fixed groove 11, and is in plug-in fit with the movable assembly 102 through the plug-in groove 131, so that the first fixed groove 11 is filled. By the arrangement of the positioning member 13, not only the movable assembly 102 can be stably mounted, but also the movable assembly 102 can be easily detached. When the movable assembly 102 is detached, the positioning member 13 may be first pulled out from the first fixing groove 11, and then the movable assembly 102 may be pulled out from the first fixing groove 11.

The second fixing groove 12 is cylindrical, and the second fixing groove 12 is internally provided with a plug-in post 121, and the plug-in post 121 is used for being in plug-in fit with the movable assembly 102 so as to be connected with the movable assembly 102 more stably. In other embodiments, the second fixing slot 12 may not be provided with the plugging post 121, and the movable component 102 may be plugged and fixed only through the second fixing slot 12.

Referring to fig. 4 and 5, the pressure sensor 2 includes a housing 21, four elastic pieces 22, and four fiber grating measuring pieces 23, the four elastic pieces 22 being uniformly arranged around the housing 21 at equal angles, each fiber grating measuring piece 23 being provided on a side of the corresponding elastic piece 22 facing the base 1. It will be appreciated that in other embodiments, the number of the elastic sheets 22 and the fiber grating measuring members 23 may be other numbers, such as three or more, and are not limited herein.

The seat body 21 is located on the base 1, and the seat body 21 is cylindrical, so that the acting force applied by the four elastic sheets 22 can be uniformly received.

The four elastic pieces 22 are integrally formed, and the four elastic pieces 22 are connected and converged at the center of the seat body 21. The plurality of resilient tabs 22 have a contact 24 at the center thereof, the contact 24 of the embodiment shown in fig. 4 being slot-shaped. When the movable assembly 102 abuts against the contact 24, the movable assembly 102 can be in sufficient contact with the inner wall of the contact 24, so that the oscilloscope can accurately reflect the acting force exerted on the contact 24 through the wavelength. In other embodiments, the contact 24 may be convex, and the movable component 102 may be provided with a groove structure adapted to the contact 24, so as to achieve sufficient contact between the contact 24 and the movable component 102.

The elastic piece 22 is detachably connected to the base 21 by a mounting screw 25 so as to facilitate replacement of the elastic piece 22. In other embodiments, the elastic sheet 22 may be connected to the base 21 in other detachable manners, and may even be connected to the base 21 by welding or integrally forming.

The fiber bragg grating measuring piece 23 is used for connecting an oscilloscope, the fiber bragg grating measuring piece 23 can convey signals to the oscilloscope based on the deformation amount of the elastic sheet 22, so that the oscilloscope displays the wavelength corresponding to the deformation amount of the elastic sheet 22, and the specific principle can be referred to the prior patent with the publication number of CN114910202A, and redundant description is omitted herein.

Referring to fig. 1 and 2, the movable assembly 102 includes a guide rail 3, an objective table 4, and a pressing block 5, the guide rail 3 is slidably disposed through the objective table 4, and the pressing block 5 is disposed on a side of the objective table 4 facing the pressure sensor 2. The stage 4 can slide back and forth along the guide rail 3 to drive the lower press block 5 against the contact 24 on the pressure sensor 2.

It is emphasized that the center of gravity of the lower press block 5 and the center of gravity of the stage 4 lie on the same vertical line, which is understood to be a line perpendicular to the horizontal plane, on which the contact point 24 lies. The advantage of setting up like this is, the effort that the heavy object 6 of placing on objective table 4 applyed objective table 4 can concentrate more on lower briquetting 5 to after lower briquetting 5 supported contact 24, elastic deformation that elastic piece 22 took place is more accurate, and the oscilloscope can reflect the state of elastic piece 22 deformation more accurately, and the user also can more directly perceivedly and accurately see the weight of heavy object 6 and the wavelength correspondence that the oscilloscope shows, and final pressure calibration device 100 can be applied to in corresponding field better.

The plane of the plurality of elastic sheets 22 is perpendicular to the vertical straight line, and it can be understood that the plane of the plurality of elastic sheets 22 is parallel to the horizontal plane, so that the pressing block 5 can press the contact 24 vertically, the deformation amount of each elastic sheet 22 generated by the pressing block 5 is kept consistent, and finally, the wavelength displayed on the oscilloscope is more visual.

The guide rail 3 includes two first slide rails 31 and two second slide rails 32, and one end of the two first slide rails 31 and one end of the two second slide rails 32 are both connected to the base 1 so as to be mounted on the base 1. The two first sliding rails 31 and the two second sliding rails 32 are arranged in parallel, and both slide through the objective table 4, so that the objective table 4 can slide back and forth on the four sliding rails at the same time. It should be noted that, the sliding direction of the stage 4 is parallel to the above-mentioned vertical straight line, and it can be understood that the length extending directions of the first sliding rail 31 and the second sliding rail 32 are both parallel to the vertical straight line, so that the stage 4 can stably drive the lower pressing block 5 to press against the contact 24. In other embodiments, the number of the sliding rails included in the guide rail 3 is not limited to four, but may be two, three or more, which is not limited herein.

Two first slide rails 31 are respectively located at two sides of the base 1, and two second slide rails 32 are respectively located at two sides of the base 1. The two first sliding rails 31 and the two second sliding rails 32 are obliquely and alternately arranged, so that the object stage 4 slides back and forth on the plurality of sliding rails more stably and is not easy to deviate. It will be appreciated that in other embodiments, the two first sliding rails 31 may be disposed on the same side of the base 1, and the two second sliding rails 32 may be disposed on the same side of the base 1, which is not limited herein.

The first slide rail 31 is cylindrical, so that the stage 4 can slide on the first slide rail 31 more smoothly.

The first sliding rail 31 has a jack (shown in the figure) facing the base 1, so that the first sliding rail 31 can be plugged into the base 1 through the jack, and the connection with the base 1 is more stable.

The cross section of the second rail 32 is i-shaped and the overall shape of the second rail 32 is similar to a train rail. The second sliding rail 32 can be slidably clamped to the objective table 4, so that the objective table 4 is connected with the second sliding rail 32 more stably. In other embodiments, the cross-sectional shape of the second rail 32 may be other non-circular shapes, such as square or triangular, without limitation.

The stage 4 is provided with a first through hole 41, a second through hole 42 and a mounting hole 43 along the thickness direction thereof, wherein the number of the first through hole 41, the second through hole 42 and the mounting hole 43 is two, and the first through hole, the second through hole 42 and the mounting hole 43 are positioned on two sides of the stage 4.

The first through hole 41 is circular and is used for being in plug-in fit with the cylindrical first sliding rail 31, so that the objective table 4 can slide back and forth along the first sliding rail 31 through the first through hole 41.

The second through hole 42 is in an i-shape and is used for being in plug-in fit with the second sliding rail 32 with the i-shaped cross section, so that the objective table 4 can slide back and forth along the second sliding rail 32 through the second through hole.

The mounting hole 43 is circular for the pull cord to pass through. The user can wear two stay cords from two mounting holes 43 respectively, tie a knot at the free end of each stay cord, and the user can use both hands to pull two stay cords to drive the objective table 4 to slide up and down.

The lower pressing block 5 has a conical shape, and one end of the larger area of the lower pressing block 5 is connected with the objective table 4, and can be connected with the objective table 4 by welding or a detachable mode, and the utility model is not limited herein. The tip (smaller area end) of the pressing block 5 is disposed facing the contact 24. The tip of lower briquetting 5 is located down briquetting 5 focus and the vertical straight line that the objective table 4 focus was located, and when objective table 4 drove down briquetting 5 and moved towards the contact, the tip of lower briquetting 5 can press contact 24 for the effort (the gravity of weight 6) that weight 6 applyed can concentrate more in contact 24.

When only one weight 6 is provided, the weight 6 may be placed as close to the vertical line or the center of the stage 4 as possible. When the plurality of weights 6 are provided, the plurality of weights 6 may be symmetrically placed around a vertical straight line, so that the force generated by the plurality of weights 6 can be more accurately concentrated to be applied to the contacts 24.

It will be appreciated that in other embodiments, the lower press block 5 may have other shapes, such as a sphere or a football, without limitation.

The movable assembly 2 further comprises a plurality of tightening screws 26, and each tightening screw 26 is screwed to the stage 4. One part of the turnbuckle 26 is used for abutting against the first sliding rail 31, and the other part of the turnbuckle 26 is used for abutting against the second sliding rail 32. The user can rotate the elastic screw 26 to enable the elastic screw 26 to be in damping abutting connection with the first sliding rail 31 and the second sliding rail 32, so that the objective table 4 is fixed at the target height, and the user can conveniently adjust the position of the pressure sensor 2 or replace other sensors to be measured.

The pressure calibration device 100 of the present utility model includes a stage 4 for placing a weight 6 to be measured, and the weight 6 may be a standard weight or the like. The weight 6 can apply pressure to the objective table 4 through self gravity, the objective table 4 slides along the guide rail towards the contact 24, and the objective table 4 drives the lower pressing block 5 to directly press the contact 24. Because objective table 4 is in the same place with down briquetting 5, down briquetting 5 can not lose, also need not to set up the steel ball, conduct effort through the steel ball, also need not to open a groove on down briquetting 5 and pressure sensor 2, saved the cost.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.

Claims

1. A pressure calibration device, comprising:

2. The pressure calibration device according to claim 1, wherein the lower pressing block is conical, a tip end of the lower pressing block faces the contact, the end with a larger area of the lower pressing block is connected with the objective table, and the objective table can drive the tip end of the lower pressing block to press against the contact.

3. The pressure calibration device of claim 2, wherein the contact is slot-shaped, and the tip of the lower press block is capable of fully contacting the inner wall of the contact when the tip of the lower press block abuts against the contact.

4. The pressure calibration device of claim 1, wherein the pressure sensor comprises a base and a plurality of elastic pieces, the base is arranged on the base, the plurality of elastic pieces are uniformly arranged around the base at equal angles, the plurality of elastic pieces are connected and converged at the center of the base, and the contact is positioned at the center of the convergence of the plurality of elastic pieces.

5. The pressure calibration device of claim 4, wherein the base is cylindrical, the planes of the elastic pieces are perpendicular to the moving direction of the lower pressing block, and the contact is located on a straight line of the movement of the lower pressing block.

6. The pressure calibration device of claim 4 or 5, wherein the elastic piece is detachably connected to the base body by a screw.

7. The pressure calibration device of claim 1, wherein the rail comprises a first rail and a second rail, the first rail being cylindrical and the second rail having an i-shaped cross-street shape.

8. The pressure calibration device of claim 7, wherein the number of the first sliding rails and the second sliding rails is two, the two first sliding rails are respectively located at two sides of the base, the two second sliding rails are respectively located at two sides of the base, and the two first sliding rails and the two second sliding rails are obliquely crossed.

9. The pressure calibration device of claim 7, wherein the sensor assembly further comprises a positioning member, the base is provided with a first fixing groove, the positioning member is provided with a plugging groove matched with the second sliding rail, and the positioning member and the second sliding rail can be matched and filled in the first fixing groove after the positioning member is plugged with the second sliding rail through the plugging groove.

10. The pressure calibration device of claim 1, wherein mounting holes are formed in both sides of the stage, and the mounting holes are used for connecting a pull rope, so that the pull rope drives the stage to slide back and forth along the guide rail.