CN221302608U - Calibration tool for pressure module - Google Patents

Abstract

The utility model relates to the technical field of sensor pressure calibration devices, in particular to a calibration tool for a pressure module, which comprises a base with a medium channel, wherein a calibration groove is formed in the base, a plurality of bearing seats for bearing the pressure module are arranged in the calibration groove, annular supports corresponding to module through holes of the pressure module are arranged on the bearing seats, and support channels communicated with the medium channel are formed in the bottom wall of the annular supports; the PCB is characterized by further comprising a cover plate corresponding to the calibration groove, wherein a PCB with a spring probe is arranged on the surface of the cover plate, and a plurality of clamping devices are arranged on the base and used for pressing the cover plate with the top of the pressure module. The device is simple in structure, few in disassembly parts in the feeding process of the pressure module, and the test probe, namely the PCB, is not easy to damage, and can effectively improve the calibration efficiency of the pressure module while ensuring to provide stable air pressure.

Description

Calibration tool for pressure module

Technical Field

The utility model relates to the technical field of sensor pressure calibration devices, in particular to a calibration tool for a pressure module.

Background

The pressure sensor is generally composed of a pressure module and a signal processing unit, is a device or a device capable of sensing pressure signals and converting the pressure signals into available output electric signals according to a certain rule, and is widely applied to various industrial self-control environments, and relates to various industries such as water conservancy and hydropower, railway transportation, intelligent building, production self-control, aerospace, military industry, petrochemical industry, oil wells, electric power, ships, machine tools, pipelines and the like.

In an automobile brake system, a pressure sensor is generally used for collecting a pressure value of brake fluid, and in order to ensure that the pressure sensors put on the market are all qualified products, manufacturers need to perform pressure test on the pressure sensors before leaving the factory so as to analyze the performance of the corresponding pressure sensors and further screen out the qualified products.

The pressure module adopted by the pressure sensor for the automobile braking system is a core component, media involved in the testing process are required to meet the requirements of FMVSS116, namely Dot 3 brake fluid, dot 4 brake fluid and Dot 5.1 brake fluid, and the temperature range of the media when the sensor works is-40-140 ℃, and the working pressure range (gauge pressure) is 0-1.143 Mpa G. The pressure module in calibration therefore needs to undergo high and low temperature impact at-40 ℃ to 140 ℃ and pressure impact and random vibration test at 0 to 1100 bar.

In order to realize quick calibration, the traditional calibration mode generally adopts gas to replace hydraulic pressure, and the environment of an automobile brake system is simulated by externally controlling the temperature and the pressure of the gas, so that the calibration of a pressure module is realized. The existing calibrating device is complex in structure, poor in air tightness, incapable of achieving batch calibration of the pressure module, and easy to damage a PCB (printed Circuit Board) and a probe for data acquisition in a calibrating process due to severe calibrating environments, so that the calibrating accuracy is affected.

Therefore, a new solution is needed to solve the above technical problems.

Disclosure of utility model

The utility model aims to solve the problems of the prior art, and provides a calibration tool for a pressure module, which is used for solving the technical problems that a calibration device in the prior art is complex in structure, high in failure rate in a severe calibration environment, and poor in calibration accuracy of the pressure module and batch operation cannot be realized.

The above purpose is realized by the following technical scheme:

The utility model provides a calibration frock for pressure module, includes the base that has the medium passageway, set up the calibration recess on the base, be provided with a plurality of bearing seats that are used for bearing pressure module in the calibration recess, be provided with the annular support that corresponds with pressure module's module through-hole on the bearing seat, the diapire of annular support is opened and is provided with the support passageway with the medium passageway intercommunication;

The bottom surface of the cover plate acts on the top of the retainer ring of the pressure module, and a plurality of groups of probe jacks corresponding to the bearing seats are arranged on the cover plate; the surface of the cover plate is provided with a PCB with a spring probe, and the spring probe is used for penetrating through the probe jack and acting on a calibration point of the pressure module;

The base is provided with a plurality of buckling devices, and the buckling devices are used for tightly pressing the cover plate and the top of the pressure module.

Further, the bearing seats are arranged in the calibration grooves at equal intervals according to 2 rows, and the corresponding clamping devices are arranged on the surfaces of the bases corresponding to the calibration grooves in a symmetrical mode.

Further, the number of the calibration grooves is 2, and the calibration grooves are communicated with each other; correspondingly, the cover plate has 2, respectively corresponds with 2 calibration recesses.

Further, the number of the bearing seats in the calibration groove is 8.

Further, be provided with a plurality of guide posts on the surface of apron, correspond offer a plurality of with guide holes that the guide post position corresponds on the PCB board, through will the guide hole cover is established the guide post realizes will on the PCB board the spring probe inserts accurately fast in the probe jack, can effectively prevent to cause under the condition of not counterpointing damage the condition of spring probe.

Further, convex pressing blocks are further arranged on the surfaces of the cover plates and adjacent to the probe insertion holes respectively, and correspondingly pressing block through grooves for the pressing blocks to penetrate are formed in the PCB; when the PCB board is aligned with the cover plate, the pressing block can penetrate through the pressing block through groove to be used for the clamping device to compress and clamp, and the clamping mode can enable the clamping device not to directly act on the PCB board, so that damage to the PCB board caused by pressure application can be effectively avoided.

Further, a plurality of first locking screw holes are formed in the PCB, a plurality of second locking screw holes are correspondingly formed in the surface of the cover plate, and the first locking screw holes and the second locking screw holes are screwed through locking screws; through this structure, will the PCB board the spring probe with the apron is connected as a whole, and rethread buckle device's effect realizes only through exerting pressure and buckle to the apron, can reach with the accurate action of spring probe the calibration point of pressure module.

Furthermore, the O-shaped sealing ring is embedded in the annular support, after the pressure module is assembled, the bottom of the pressure module is tightly attached to the O-shaped sealing ring, and the tightness that a medium in a support channel enters a module through hole of the pressure module can be effectively ensured.

Further, the buckle device comprises a buckle support seat used for being fixed with the base, a buckle support arm and a buckle rotating arm are hinged to the buckle support seat, a buckle pull rod is hinged to the buckle rotating arm, and the other end of the buckle pull rod is hinged to the buckle support arm; the outer end of the buckle support arm is connected with a buckle pressure head; the clamping rotating arm can indirectly drive the clamping support arm to drive the clamping pressure head to do arc-shaped movement.

Further, a handle sleeve is further arranged at the top of the buckle radial arm, so that manual operation is facilitated, and the buckle radial arm is driven to move in an arc shape.

Advantageous effects

The calibrating tool for the pressure module is simple in structure, few in disassembly parts in the feeding process of the pressure module, and not easy to damage a test probe, namely a PCB; in addition, the air tightness is good, the assembly and the disassembly are easy, and the efficiency of the calibration of the pressure module can be effectively improved while the stable air pressure is ensured to be provided.

Drawings

FIG. 1 is a schematic structural diagram of a calibration fixture for a pressure module according to the present utility model;

FIG. 2 is an exploded view of a calibration tooling for a pressure module according to the present utility model;

FIG. 3 is a cross-sectional view of a calibration fixture for a pressure module according to the present utility model;

FIG. 4 is a schematic diagram of an unassembled cover plate and PCB structure of a calibration fixture for a pressure module according to the present utility model;

FIG. 5 is a schematic view of a base structure of a calibration fixture for a pressure module according to the present utility model;

FIG. 6 is a schematic view of medium channels in a base of a calibration fixture for a pressure module according to the present utility model;

Fig. 7 is an exploded view of a buckle device of a calibration fixture for a pressure module according to the present utility model.

The graphic indicia:

1-base, 101-medium channel, 102-calibration groove, 103-bearing seat, 104-annular support, 105-support channel;

2-pressure module, 201-module through hole, 202-check ring and 203-calibration point;

3-cover plate, 301-probe jack, 302-guide post, 303-press block, 304-second locking screw hole;

The device comprises a 4-PCB, a 401-spring probe, a 402-guide hole, a 403-press block through groove and a 404-first locking screw hole;

5-buckle device, 501-buckle support, 502-buckle support arm, 503-buckle radial arm, 504-buckle pull rod, 505-buckle pressure head, 506-handle sleeve;

6-locking the screw;

7-O type sealing washer.

Detailed Description

The utility model is described in further detail below with reference to the figures and examples.

As shown in fig. 1 to 3, a calibration fixture for a pressure module comprises a base 1 with a medium channel 101, wherein a calibration groove 102 is formed in the base 1, a plurality of bearing seats 103 for bearing the pressure module 2 are arranged in the calibration groove 102, an annular support 104 corresponding to a module through hole 201 of the pressure module 2 is arranged on the bearing seats 103, and a support channel 105 communicated with the medium channel 101 is formed in the bottom wall of the annular support 104;

The device further comprises a cover plate 3 corresponding to the calibration groove 102, wherein the bottom surface of the cover plate 3 acts on the top of the retainer ring 202 of the pressure module 2, and a plurality of groups of probe jacks 301 corresponding to the number of the bearing seats 103 are arranged on the cover plate 3; a PCB 4 with a spring probe 401 is arranged on the surface of the cover plate 3, and the spring probe 401 is used for penetrating the probe jack 301 and acting on the calibration point 203 of the pressure module 2;

A plurality of buckling devices 5 are arranged on the base 1, and the buckling devices 5 are used for pressing the cover plate 3 and the top of the pressure module 2.

Working principle:

As shown in fig. 2 and 4, when in use, the buckle device 5 is opened in advance to expose the calibration groove 102, then the pressure module 2 to be calibrated is placed on each bearing seat 103 in turn, then the cover plate 3 and the PCB board 4 with the spring probe 401 are respectively installed, finally the buckle device 5 is closed, and at this time, the filling of the pressure module 2 is completed, and the subsequent calibration test is directly performed.

The principle of calibration is as follows: a predetermined air pressure is input into the medium channel 101, and the air pressure enters the module through hole 201 of the pressure module 2 along the support channel 105, and at this time, the spring probe 401 collects data and leads to an external monitoring computer through a digital circuit on the PCB board so as to monitor and compare the data.

After the calibration of the batch pressure module 2 is completed, the above steps are reversed to complete the filling of the new batch pressure module 2.

As shown in fig. 2, 5 and 6, as a specific embodiment of the present disclosure, the bearing seats 103 are disposed in the alignment grooves 102 at equal intervals of 2 rows, and the corresponding fastening devices 5 have 2 rows and are symmetrically disposed on the surface of the base 1 corresponding to the alignment grooves 102.

Wherein, the number of the calibration grooves 102 is 2, which are communicated with each other; correspondingly, the cover plate 3 has 2 corresponding to 2 alignment grooves 102 respectively.

Specifically, there are 8 bearing seats 103 in the calibration groove 102, and calibration of 16 pressure modules 2 can be completed at the same time.

As shown in fig. 2, a plurality of guide posts 302 are provided on the surface of the cover plate 3, and a plurality of guide holes 402 corresponding to the positions of the guide posts 302 are provided on the PCB 4 correspondingly;

By sleeving the guide hole 402 with the guide post 302, the spring probe 401 on the PCB 4 is accurately and rapidly inserted into the probe insertion hole 301, so that damage to the spring probe 401 under the condition of non-alignment can be effectively prevented.

As an optimization of the embodiment, in the embodiment, a raised pressing block 303 is further provided on the surface of the cover plate 3at positions adjacent to the probe insertion holes 301, and correspondingly, a pressing block through groove 403 for the pressing block 303 to penetrate is formed on the PCB 4;

Specifically, when the PCB 4 is aligned with the cover plate 3, the pressing block 303 may penetrate through the pressing block through groove 403 to press the fastening device 5 for fastening, and the fastening mode may enable the fastening device 5 not to directly act on the PCB 4, so as to effectively prevent the PCB 4 from being damaged due to pressure application.

In addition, a plurality of first locking screw holes 404 are formed in the PCB 4, and a plurality of second locking screw holes 304 are correspondingly formed in the surface of the cover plate 3, and the first locking screw holes 404 and the second locking screw holes 304 are screwed by locking screws 6; through this structure, will PCB board 4 spring probe 401 with apron 3 connects as a whole, rethread buckle device 5's effect realizes only through pressing and buckle to apron 3, can reach with spring probe 401 is accurate acts on pressure module 2's calibration point 203.

It should be noted that, in this embodiment, the O-ring 7 is embedded in the annular support 104, and after the assembly of the pressure module 2 is completed, the bottom of the pressure module 2 is tightly attached to the O-ring 7, so that the tightness of the medium in the support channel 105 entering the module through hole 201 of the pressure module 2 can be effectively ensured.

Specifically, in this embodiment, the material of the O-ring 7 is ethylene propylene diene monomer, which can withstand the temperature of-50 ℃ to 150 ℃, and the O-ring will not deform when the high-low temperature impact test is performed, so that the tightness of the set of clamp is ensured.

As shown in fig. 7, the fastening device 5 in this embodiment includes a fastening support 501 for fixing to the base 1, a fastening support arm 502 and a fastening radial arm 503 are hinged to the fastening support 501, a fastening pull rod 504 is hinged to the fastening radial arm 503, and the other end of the fastening pull rod 504 is hinged to the fastening support arm 502; the outer end of the buckle support arm 502 is connected with a buckle pressure head 505; by rotating the latch arm 503, the latch arm 502 may be indirectly driven to drive the latch ram 505 to move in an arc.

In order to facilitate manual adjustment, a handle sleeve 506 is further arranged at the top of the fastening radial arm 503, so that manual operation is facilitated to drive the fastening radial arm 503 to move in an arc shape.

While the utility model has been described with respect to the preferred embodiments, it is to be understood that the utility model is not limited thereto, but is capable of modification and substitution within the spirit and scope of the utility model as will be apparent to those skilled in the art. Therefore, the protection scope of the present utility model should be subject to the claims.

Claims (10)

1. The calibrating tool for the pressure module is characterized by comprising a base (1) with a medium channel (101), wherein a calibrating groove (102) is formed in the base (1), a plurality of bearing seats (103) for bearing the pressure module (2) are arranged in the calibrating groove (102), annular supports (104) corresponding to module through holes (201) of the pressure module (2) are arranged on the bearing seats (103), and support channels (105) communicated with the medium channel (101) are formed in the bottom wall of each annular support (104);

The device further comprises a cover plate (3) corresponding to the calibration groove (102), wherein the bottom surface of the cover plate (3) acts on the top of a retainer ring (202) of the pressure module (2), and a plurality of groups of probe jacks (301) corresponding to the bearing seats (103) in number are arranged on the cover plate (3); a PCB (4) with a spring probe (401) is arranged on the surface of the cover plate (3), and the spring probe (401) is used for penetrating the probe jack (301) and acting on a calibration point (203) of the pressure module (2);

A plurality of buckling devices (5) are arranged on the base (1), and the buckling devices (5) are used for tightly pressing the cover plate (3) with the top of the pressure module (2).

2. The calibration fixture for the pressure module according to claim 1, wherein the bearing seats (103) are arranged in the calibration grooves (102) at equal intervals of 2 rows, and the corresponding clamping devices (5) are arranged on the surface of the base (1) corresponding to the calibration grooves (102) in a symmetrical manner.

3. A calibration fixture for a pressure module according to claim 2, characterized in that there are 2 calibration grooves (102) communicating with each other; correspondingly, the cover plates (3) are 2, and the cover plates respectively correspond to 2 calibration grooves (102).

4. A calibration fixture for a pressure module according to claim 3, characterized in that there are 8 of said bearing seats (103) in said calibration groove (102).

5. The calibration fixture for the pressure module according to claim 1 or 2, wherein a plurality of guide posts (302) are arranged on the surface of the cover plate (3), and correspondingly, a plurality of guide holes (402) corresponding to the positions of the guide posts (302) are formed in the PCB (4), and the spring probes (401) on the PCB (4) are accurately and quickly inserted into the probe insertion holes (301) by sleeving the guide posts (302) with the guide holes (402), so that damage to the spring probes (401) under the condition of non-alignment can be effectively prevented.

6. The calibration fixture for the pressure module according to claim 5, wherein a raised pressing block (303) is further arranged on the surface of the cover plate (3) at positions adjacent to the probe insertion holes (301), and correspondingly, a pressing block through groove (403) for the pressing block (303) to penetrate is formed in the PCB (4); when the PCB (4) is aligned with the cover plate (3), the pressing block (303) can penetrate through the pressing block through groove (403) to be used for pressing and clamping the clamping device (5), and the clamping mode can enable the clamping device (5) not to directly act on the PCB (4), so that the clamping device can be effective

And the damage of the PCB (4) caused by the application of pressure is avoided.

7. The calibration fixture for the pressure module according to claim 5, wherein a plurality of first locking screw holes (404) are formed in the PCB (4), and a plurality of second locking screw holes (304) are correspondingly formed in the surface of the cover plate (3), and the first locking screw holes (404) and the second locking screw holes (304) are screwed together through locking screws (6).

8. The calibration fixture for the pressure module according to claim 1, wherein an O-shaped sealing ring (7) is embedded in the annular support (104), and after the pressure module (2) is assembled, the bottom of the pressure module (2) is tightly attached to the O-shaped sealing ring (7), so that the tightness of a medium in the support channel (105) entering a module through hole (201) of the pressure module (2) can be effectively ensured.

9. Calibration fixture for pressure modules according to claim 1, characterized in that said snap means (5) comprise a snap seat (501) for fixing with said base (1), said snap seat (501) being hinged with a snap arm (502) and a snap arm (503), said snap arm (503) being hinged with a snap pull rod (504), the other end of said snap pull rod (504) being hinged with said snap arm (502); the outer end of the clamping support arm (502) is connected with a clamping pressure head (505); the clamping arm (502) can be indirectly driven to drive the clamping pressure head (505) to move in an arc shape by rotating the clamping radial arm (503).

10. The calibration fixture for the pressure module according to claim 1, wherein a handle sleeve (506) is further arranged on the top of the buckling radial arm (503), so that manual operation is facilitated to drive the buckling radial arm (503) to move in an arc shape.