Test fixture for pressure sensor detection

Abstract

The invention provides a test fixture for detecting a pressure sensor, and relates to a test fixture, the test fixture comprises an annular primary turntable and a plurality of groups of secondary turntables uniformly arranged on the primary turntable along the annular direction, and a plurality of groups of positioning clamps are uniformly arranged on the horizontal table surface of each group of secondary turntable along the annular direction; the feeding station, the discharging station and the two adjacent sets of secondary rotating discs are distributed in an aligned mode, a set of vibration discs are arranged at the feeding station, the discharging ends of the tail ends of the vibration discs are aligned to the set of positioning clamps rotating in place, and the opening ends of the positioning clamps are aligned to the discharging ends so as to clamp carriers conveyed in place. A plurality of groups of measuring frames are further arranged at the annular center of the first-stage rotating disc, and the measuring frames corresponding to the feeding station and the discharging station are each provided with a measuring group, so that automatic transfer of the clamps can be achieved, pressure detection of weights with different weights at different positions can be adapted, the detection efficiency and precision are improved, manual intervention is reduced, and the detection accuracy is improved. And the automation level and the pressure detection efficiency of the test process are improved.

Description

Technical Field

[0001] The invention relates to a test fixture, in particular to a test fixture for detecting a pressure sensor. Background Art

[0002] A pressure sensor is a device or apparatus that can sense pressure signals and convert them into usable output electrical signals according to certain rules. When testing a pressure sensor, it is usually necessary to use standard weights to apply different pressure values ​​to verify the accuracy and stability of the sensor. However, traditional testing equipment requires manual intervention to replace weights of different weights, which often leads to cumbersome operation, low detection efficiency, and large errors.

[0003] As shown in the patent of a fully automatic pressure sensor durability tester (publication number CN217155692U), although it can achieve the technical effect of automatically adding weights, it still requires a certain waiting time in the process of adding and removing weights, and the method of suspending weights by pulling ropes is also very easy to vibrate and shift when the weights fall, so the stability and efficiency are still poor;

[0004] Therefore, in order to improve the automation, accuracy and efficiency of pressure sensor testing, there is an urgent need for a test fixture that can automatically transfer and adapt to different positions and different weights to apply pressure. Summary of the invention

[0005] The purpose of the present invention is to provide a test fixture for pressure sensor detection, which can realize automatic transfer of the fixture and adapt to pressure detection of weights of different weights at different positions, thereby improving detection efficiency and accuracy, reducing manual intervention, and improving the automation level of the test process and the pressure detection efficiency.

[0006] The present invention provides the following technical solutions:

[0007] A test fixture for detecting a pressure sensor comprises a primary turntable in an annular shape and a plurality of secondary turntables evenly arranged on the primary turntable along an annular shape, wherein the center of the annular shape formed by the plurality of secondary turntables is coaxially arranged with the rotation center of the primary turntable, and the axis where the rotation center of the secondary turntable is located is vertically distributed with the horizontal disk surface of the primary turntable, and a plurality of positioning clamps are evenly arranged along an annular direction on the horizontal disk surface of each group of secondary turntables, so that the space occupied by the overall structure can be reduced on the basis of ensuring the number of clamped products due to the overlapping of the primary turntable and the secondary turntable. Space, one side of the first-level turntable is also provided with a loading station for feeding and a unloading station for unloading, and the loading station and the unloading station are aligned with the two adjacent groups of second-level turntables, a group of vibration plates are arranged at the loading station, and the discharge end of the tail end of the vibration plate is aligned with a group of positioning clamps rotated into place, the vibration plate is used to sequentially convey the carrier with the pressure sensor positioned to the discharge end, the open end of the positioning clamp is aligned with the discharge end to clamp the carrier transported into place, and the second-level turntable is used to rotate the clamped positioning clamp away from the discharge end;

[0008] At this point, the carrier and pressure sensor that load materials from the loading station to the positioning clamp can realize continuous loading of materials during the rotation of the secondary turntable and the primary turntable for batch testing operations, and the overall structure is more integrated and compact.

[0009] In order to further improve the compactness, a group of central tables are arranged at the annular center of the first-level turntable, and multiple groups of measuring frames are evenly arranged on the central table along its circumference. The multiple groups of measuring frames are arranged in a one-to-one correspondence with the secondary turntable, and when the secondary turntable rotates with the first-level turntable to the bottom of the corresponding measuring frame, a group of measuring groups are installed on the measuring frames above the secondary turntable except for the one aligned with the loading station and the unloading station. The measuring groups installed on different measuring frames are used to perform synchronous pressure tests of different weight levels on pressure sensors at different positions to improve the detection efficiency. The secondary turntable is also used to rotate the clamped carrier to the bottom of the measuring frame to cooperate with the measuring group to perform pressure tests on the pressure sensors on the carrier. The first-level turntable is used to synchronously drive multiple groups of secondary turntables to be alternately placed under the measuring groups for synchronous testing.

[0010] When performing the test assembly line operation of the pressure sensor, first, the vibration plate drives the carrier with the pressure sensor positioned to load to the discharge end, and pushes to the open end of the positioning clamp, so that a group of carriers are fed into the clamping mouth of a group of positioning clamps, and then the secondary turntable rotates a certain angle, so that the next group of empty positioning clamps rotates to align with the discharge end to undertake the loading of the next group of carriers, until all the positioning clamps on this secondary turntable have completed loading, then the primary turntable is rotated, so that the secondary turntable that has completed unloading at the adjacent unloading station is rotated again to dock with the loading station, and at this time, the secondary turntable between the loading station and the unloading station corresponds to the detection station, and at different detection stations, different measurement groups perform synchronous pressure tests of different weight levels to improve the detection efficiency, and the whole process, starting from the vibration plate and ending at the unloading station, does not require manual intervention, and the detection efficiency and accuracy can also be greatly improved.

[0011] Preferably, the positioning clamp is an elastic positioning clamp, which includes a central axis positioned on the secondary turntable and two groups of clamp S arc segments sleeved on the central axis, a group of clamp openings formed by the intersection of the two groups of clamp S arc segments is the open end of the positioning clamp, which is used to hold the carrier for positioning and loading, and another group of clamp openings formed by the intersection of the two groups of clamp S arc segments is provided with an elastic top pressure piece, the elastic top pressure piece includes a guide cylinder fixed on the secondary turntable and a spring placed in the guide cylinder, the middle section of the spring is fixed in the guide cylinder, and the two ends of the spring are hung and connected to the two groups of clamps through pull rings At the end of the S-arc segment, when the discharge end of the vibration plate is feeding toward the opening end of the positioning clamp, the carrier with a circular outer contour expands outward to press the two sets of S-arc segments of the clamps, driving the ends of the S-arc segments of the two sets of clamps to stretch the springs, and when the carrier is completely placed in the clamping openings of the two sets of clamps, the springs are in a stretched state. At this point, the carrier can be automatically clamped by the stretching force of the spring. At this time, the structure is a non-powered clamping structure, so the testing cost of the structure can be greatly reduced. At the same time, because the structure is an elastic positioning clamp, the floating fine-tuning of the feeding position can be automatically completed, and the flexibility is also better.

[0012] Preferably, a circle of annular clamping grooves is provided around the periphery of the carrier, and the clamping openings of the two groups of clamping S-arc segments are clamped in the clamping grooves for clamping positioning to improve the stability of the clamping.

[0013] Preferably, the ends of the clamping openings of the two groups of clamping S-arc segments are also provided with outwardly flared arc surface segments to ensure that the vehicle can enter the clamping opening more smoothly at the initial stage.

[0014] Preferably, a group of receiving grooves that cooperate with the positioning clamps are provided at the unloading station. In order to realize automated unloading operations, a group of mounting platforms fixed on the primary turntable can be arranged at the central slot hole of the secondary turntable. A group of pushing cylinders are installed on the mounting platforms. The driving end of the positioning cylinders is used to push the carrier in the clamping mouth into the receiving grooves.

[0015] Preferably, it is characterized in that the test group includes a tray connected to the bottom of the test frame through a lifting support, weights are placed on the tray, and the weights of the weights of different test groups are different, when a carrier on a group of secondary turntables rotates to under the tray, the lifting support is used to drive the tray to descend, so that the tray freely hangs and supports the pressure sensor in the carrier to apply test pressure to the pressure sensor, and after the pressure sensor completes the test, the lifting support then drives the tray to rise so that the secondary turntable continues to rotate.

[0016] Preferably, the lifting support frame includes at least three groups of columnar rod frames connected to the bottom of the test frame and distributed in the annular direction, a group of central axis slideways are opened in the center of the columnar rod frame, and multiple groups of edge slideways penetrating to the central axis slideways are opened around the columnar rod frame, a group of nut blocks are guided and installed in the central axis slideways, and a group of unit blocks connected to the nut blocks are guided and installed in each group of edge slideways, and the side curved surfaces of the multiple groups of unit blocks extending out of the columnar rod frames are the curved surfaces where a group of conical surfaces are located, and a group of screw rods are also threadedly connected in the nut blocks, and the screw rods are installed in the test frame. In the test frame, an external gear is connected to the top of the extended side frame. The tray is provided with an inner conical surface that matches the side curved surface of the unit block. Therefore, when the screw rotates to drive the different groups of unit blocks to rise, the tray can be driven to rise. When the tray is driven to descend, after the tray is placed on the pressure sensor and pressure is applied, when the unit block is continued to be driven to descend, a gap can be formed between the inner conical surface of the tray to avoid the impact during the test. At the same time, it can also ensure that when the tray is raised and lowered to contact the pressure sensor, the stability and placement accuracy are also higher.

[0017] Preferably, a group of transition swivels are also connected to the test stand, the inner ring of the transition swivel is provided with an inner gear ring that is synchronously meshed with multiple groups of external gears, the outer ring of the transition swivel is also provided with an outer gear ring, a test synchronous motor is installed on the center table, the driving end of the test synchronous motor is connected to a group of drive swivels, the drive swivel is connected and installed on the center table, and its outer ring is also provided with a matching gear ring that meshes with the outer gear ring.

[0018] Preferably, the outer ring of the primary turntable is provided with a group of primary gear rings, and a group of primary drive motors are engaged with the primary gear rings through the driving end to realize the rotation of the primary turntable, the outer ring of the secondary turntable is provided with a group of secondary gear rings, a group of transfer rings are connected and installed on the primary turntable, and a group of transfer motors are fixedly installed on the primary turntable, the outer ring of the transfer ring is provided with a transfer gear ring 1 engaged with the secondary gear ring, and the inner ring of the transfer ring is provided with a transfer gear ring 2 engaged with the driving end of the transfer motor. At this point, when the transfer motor drives to rotate, multiple groups of secondary turntables can be driven to rotate synchronously, thereby reducing the driving cost.

[0019] The beneficial effects of the present invention are:

[0020] The test fixture for pressure sensor detection provided by the present invention can realize automatic transfer of the fixture and adapt to pressure detection of weights of different weights at different positions, thereby improving detection efficiency and accuracy, reducing manual intervention, and improving the automation level of the test process and pressure detection efficiency. The driving result is also relatively simple and the detection cost is also low.

[0021] Specifically, when performing the test assembly line operation of the pressure sensor, first, the vibration plate drives the carrier with the pressure sensor positioned to load to the discharge end, and pushes to the open end of the positioning clamp, so that a group of carriers are fed into the clamping mouth of a group of positioning clamps, and then the secondary turntable rotates a certain angle, so that the next group of empty positioning clamps rotates to align with the discharge end to undertake the loading of the next group of carriers, until all the positioning clamps on this secondary turntable have completed loading, then the primary turntable is rotated, so that the secondary turntable that has completed unloading at the adjacent unloading station is rotated again to dock with the loading station, and at this time, the secondary turntable between the loading station and the unloading station corresponds to the detection station, and at different detection stations, different measurement groups perform synchronous pressure tests of different weight levels to improve the detection efficiency, and the whole process, starting from the vibration plate and ending at the unloading station, does not require manual intervention, and the detection efficiency and accuracy can also be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a top view of the structure of the present invention;

[0024] Figure 2 It is a top-down schematic diagram of the first-episode turntable and the secondary turntable;

[0025] Figure 3 This is a schematic diagram of the structure when the loading station and the secondary turntable are aligned;

[0026] Figure 4 This is a structural diagram of the alignment between the unloading station and the secondary turntable;

[0027] Figure 5 It is a schematic diagram of the structure when the test group on the test stand places the tray;

[0028] Markings in the figure:

[0029] 1. Primary turntable; 2. Secondary turntable; 3. Positioning clamp; 4. Discharging end; 5. Center table; 6. Measuring frame; 7. Measuring group; 8. Pressure sensor; 9. Carrier; 10. Receiving groove; 11. Primary gear ring; 12. Secondary gear ring; 13. Transfer swivel; 14. Transfer motor; 15. Transfer gear ring 1; 16. Transfer gear ring 2; 21. Push cylinder; 31. Center shaft; 32. Clamp S arc segment; 33. Guide cylinder; 34. Spring; 35, slot; 36, arc surface segment; 71, tray; 72, weight; 73, columnar rod frame; 74, center axis slide; 75, edge slide; 76, nut block; 77, unit block; 78, side curved surface; 79, screw rod; 710, external gear; 711, internal cone; 712, transition swivel; 713, internal gear ring; 714, external gear ring; 715, test synchronous motor; 716, drive swivel; 717, matching gear ring. DETAILED DESCRIPTION

[0030] Example 1

[0031] like Figure 1-5 As shown, a test fixture for detecting a pressure sensor 8, in this embodiment, includes a ring-shaped primary turntable 1 and a plurality of groups of secondary turntables 2 evenly arranged on the primary turntable 1 along a ring, the center of the ring formed by the plurality of groups of secondary turntables 2 is coaxially arranged with the rotation center of the primary turntable 1, and the axis where the rotation center of the secondary turntable 2 is located is vertically distributed with the horizontal disk surface of the primary turntable 1, and a plurality of groups of positioning clamps 3 are evenly arranged along the ring direction on the horizontal disk surface of each group of secondary turntables 2, so far, due to the overlapping of the primary turntable 1 and the secondary turntable 2, the overall pressure drop can be reduced on the basis of ensuring the number of clamped products. The space occupied by the structure, one side of the first-level turntable 1 is also provided with a loading station for feeding and a unloading station for unloading, and the loading station and the unloading station are aligned with the two adjacent groups of secondary turntables 2, and a group of vibration plates are arranged at the loading station, and the discharge end 4 at the tail end of the vibration plate is aligned with a group of positioning clamps 3 rotated into place, and the vibration plate is used to sequentially convey the carrier 9 with the pressure sensor 8 positioned to the discharge end 4, and the open end of the positioning clamp 3 is aligned with the discharge end 4 to clamp the carrier 9 conveyed into place, and the secondary turntable 2 is used to rotate the clamped positioning clamp 3 away from the discharge end 4;

[0032] At this point, the carrier 9 and the pressure sensor 8 that load materials from the loading station to the positioning clamp 3 can realize continuous loading of materials during the rotation of the secondary turntable 2 and the primary turntable 1 for batch testing operations, and the overall structure is more integrated and compact;

[0033] In order to further improve the compactness, a group of central table surfaces 5 are arranged at the annular center of the primary turntable 1, and multiple groups of measuring frames 6 are evenly arranged on the central table surface 5 along its circumference. The multiple groups of measuring frames 6 are arranged in a one-to-one correspondence with the secondary turntable 2, and when the secondary turntable 2 rotates with the primary turntable 1 to the bottom of the corresponding measuring frame 6, except for the measuring frames 6 above the secondary turntable 2 aligned with the loading station and the unloading station, a group of measuring groups 7 are installed. The measuring groups 7 installed on different measuring frames 6 are used to perform synchronous pressure tests of different weight levels on pressure sensors 8 at different positions to improve the detection efficiency. The secondary turntable 2 is also used to rotate the clamped carrier 9 to the bottom of the measuring frame 6 to cooperate with the measuring group 7 to perform pressure tests on the pressure sensors 8 on the carrier 9. The primary turntable 1 is used to synchronously drive multiple groups of secondary turntables 2 to be alternately placed under the measuring group 7 for synchronous testing;

[0034] When the pressure sensor 8 is tested on the assembly line, first, the vibration plate drives the carrier 9 with the pressure sensor 8 to be loaded to the discharge end 4, and pushes to the open end of the positioning clamp 3, so that a group of carriers 9 are fed into the clamping opening of a group of positioning clamps 3, and then the secondary turntable 2 rotates a certain angle, so that the next group of empty positioning clamps 3 rotate to align with the discharge end 4 to undertake the loading of the next group of carriers 9, until all the positioning clamps 3 on this secondary turntable 2 have completed loading, then the primary turntable 1 is rotated, so that the secondary turntable 2 that has completed unloading at the adjacent unloading station is rotated again to dock with the loading station, and at this time, the secondary turntable 2 between the loading station and the unloading station corresponds to the detection station, and at different detection stations, different measurement groups 7 perform synchronous pressure tests of different weight levels to improve the detection efficiency, and the whole process, starting from the vibration plate and ending at the unloading station, does not require manual intervention, and the detection efficiency and accuracy can also be greatly improved.

[0035] The positioning clamp 3 is an elastic positioning clamp 3, which includes a central axis 31 positioned on the secondary turntable and two groups of clamp S arc segments 32 sleeved on the central axis 31. A group of clamp openings formed by the intersection of the two groups of clamp S arc segments 32 is the open end of the positioning clamp 3, which is used to hold the carrier 9 for positioning and loading. An elastic top pressure piece is provided at another group of clamp openings formed by the intersection of the two groups of clamp S arc segments 32. The elastic top pressure piece includes a guide cylinder 33 fixed on the secondary turntable and a spring 34 placed in the guide cylinder 33. The middle section of the spring 34 is fixed in the guide cylinder 33, and its two ends are hung and connected to the two groups of clamps through pull rings. At the end of the S arc segment 32, when the discharge end 4 of the vibration plate is feeding toward the open end of the positioning clamp 3, the carrier 9 with a circular outer contour expands outward to press the two groups of clamping S arc segments 32, driving the ends of the two groups of clamping S arc segments 32 to stretch the springs 34, and when the carrier 9 is completely placed in the clamping openings of the two groups of clamping S arc segments 32, the springs 34 are in a stretched state. At this point, the carrier 9 can be automatically clamped by the stretching force of the springs 34. At this time, the structure is a non-powered clamping structure, so the testing cost of the structure can be greatly reduced. At the same time, because the structure is an elastic positioning clamp 3, the floating fine-tuning of the feeding position can be automatically completed, and the flexibility is also better.

[0036] The carrier 9 is also provided with an annular clamping groove 35 around its periphery, and the clamping openings of the two clamping S-arc segments 32 are clamped in the clamping groove 35 for clamping positioning to improve the stability of the clamping.

[0037] The ends of the clamping openings of the two groups of clamping S arc segments 32 are also provided with outwardly flared arc surface segments 36 to ensure that the carrier 9 can enter the clamping opening more smoothly at the beginning.

[0038] A group of receiving grooves 10 that match the positioning clamps 3 are arranged at the unloading station. In order to realize the automated unloading operation, a group of mounting platforms fixed on the primary turntable 1 can be arranged at the central slot hole of the secondary turntable 2. A group of pushing cylinders 21 are installed on the mounting platforms. The driving end of the positioning cylinders is used to push the carrier 9 in the clamping mouth into the receiving grooves 10.

[0039] Example 2

[0040] A test fixture for detecting a pressure sensor 8. In this embodiment, it is further limited based on Embodiment 1. The test group includes a tray 71 connected to the bottom of the test frame through a lifting support frame. Weights 72 are placed on the tray 71, and the weights 72 of different test groups are different. When a carrier 9 on a group of secondary turntables 2 rotates to under the tray 71, the lifting support frame is used to drive the tray 71 to descend, so that the tray 71 freely hangs and supports the pressure sensor 8 in the carrier 9 to apply pressure to the pressure sensor 8 for testing, and after the pressure sensor 8 completes the test, the lifting support frame then drives the tray 71 to rise so that the secondary turntable 2 continues to rotate.

[0041] The lifting support frame includes at least three groups of columnar rod frames 73 connected to the bottom of the test frame and distributed in the circumferential direction. A group of central axis slideways 74 is provided in the center of the columnar rod frame 73. A plurality of edge slideways 75 penetrating to the central axis slideway 74 are provided around the columnar rod frame 73. A group of nut blocks 76 are guided and installed in the central axis slideway 74. A group of unit blocks 77 connected to the nut blocks 76 are guided and installed in each group of edge slideways 75. The side curved surfaces 78 of the plurality of groups of unit blocks 77 extending out of the columnar rod frame 73 are the curved surfaces where a group of conical surfaces are located. A group of screw rods 79 are also threadedly connected in the nut blocks 76. The screw rods 79 are transferred and installed in the test frame. The tray 71 is provided with an inner conical surface 711 which cooperates with the side curved surface 78 of the unit block 77. Therefore, when the screw rod 79 rotates to drive the different groups of unit blocks 77 to rise, the tray 71 can be driven to rise. When the tray 71 is driven to descend, after the tray 71 is placed on the pressure sensor 8 and pressure is applied, when the unit block 77 is continued to be driven to descend, a gap can be formed between the inner conical surface 711 of the tray 71 to avoid the impact during the test. At the same time, it can also ensure that when the tray 71 is raised and lowered to contact the pressure sensor 8, the stability and placement accuracy are also higher.

[0042] The test frame is also connected with a set of transition swivels 712, the inner ring of the transition swivel 712 is provided with an inner gear ring 713 which is synchronously meshed with multiple sets of outer gears 710, the outer ring of the transition swivel 712 is also provided with an outer gear ring 714, a test synchronous motor 715 is installed on the center table 5, the driving end of the test synchronous motor 715 is connected with a set of drive swivels 716, the drive swivel 716 is connected and installed on the center table 5, and its outer ring is also provided with a matching gear ring 717 which is meshed with the outer gear ring 714, so that a set of test synchronous motors 715 can synchronously complete the test pressure operation of multiple test groups.

[0043] The outer ring of the primary turntable 1 is provided with a group of primary gear rings 11, and a group of primary driving motors are engaged with the primary gear rings 11 through the driving end to realize the rotation of the primary turntable 1, the outer ring of the secondary turntable 2 is provided with a group of secondary gear rings 12, a group of transfer rings 13 are installed on the primary turntable 1, and a group of transfer motors 14 are fixedly installed on the primary turntable 1, the outer ring of the transfer ring 13 is provided with a transfer gear ring 15 engaged with the secondary gear ring 12, and the inner ring of the transfer ring 13 is provided with a transfer gear ring 2 16 engaged with the driving end of the transfer motor 14. At this point, when the transfer motor 14 is driven to rotate, multiple groups of secondary turntables 2 can be driven to rotate synchronously, thereby reducing the driving cost.

[0044] The working principle of the present invention is as follows: the test fixture for detecting the pressure sensor 8 provided by the present invention can realize the automatic transfer of the fixture, adapt to the pressure detection of weights 72 of different weights at different positions, thereby improving the detection efficiency and accuracy, reducing manual intervention, and improving the automation level of the test process and the pressure detection efficiency, and the driving result is also relatively simple, and the detection cost is also low;

[0045] Specifically, when performing the test assembly line operation of the pressure sensor 8, first, the vibration plate drives the carrier 9 with the pressure sensor 8 positioned to load to the discharge end 4, and pushes to the open end of the positioning clamp 3, so that a group of carriers 9 are fed into the clamping opening of a group of positioning clamps 3, and then the secondary turntable 2 rotates a certain angle, so that the next group of empty positioning clamps 3 rotate to align with the discharge end 4 to undertake the loading of the next group of carriers 9, until all the positioning clamps 3 on this secondary turntable 2 have completed loading, then the primary turntable 1 is rotated, so that the secondary turntable 2 that has completed unloading at the adjacent unloading station is rotated again to dock with the loading station, and at this time, the secondary turntable 2 between the loading station and the unloading station corresponds to the detection station, and at different detection stations, different measurement groups 7 perform synchronous pressure tests of different weight levels to improve the detection efficiency, and the whole process, starting from the vibration plate and ending at the unloading station, does not require manual intervention, and the detection efficiency and accuracy can also be greatly improved.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A test fixture for pressure sensor detection, characterized in that: The invention comprises a first-stage rotating disk (1) in an annular shape and a plurality of second-stage rotating disks (2) evenly arranged in an annular shape on the first-stage rotating disk (1), wherein the center of the annular shape formed by the plurality of second-stage rotating disks (2) is coaxially arranged with the rotation center of the first-stage rotating disk (1), and the axis where the rotation center of the second-stage rotating disk (2) is located is vertically distributed with the horizontal disk surface of the first-stage rotating disk (1), and a plurality of positioning clamps (3) are evenly arranged in an annular direction on the horizontal disk surface of each second-stage rotating disk (2), and a loading station for feeding and a unloading station for unloading are also arranged on one side of the first-stage rotating disk (1). The feeding station and the unloading station are aligned with the two adjacent secondary turntables (2), a group of vibrating disks are arranged at the feeding station, and the discharge end (4) at the rear end of the vibrating disk is aligned with a group of positioning clamps (3) rotated into position, the vibrating disk is used to sequentially transport the carrier (9) with the pressure sensor (8) positioned to the discharge end (4), the open end of the positioning clamp (3) is aligned with the discharge end (4) to clamp the carrier (9) transported into position, and the secondary turntable (2) is used to rotate the clamped positioning clamp (3) away from the discharge end (4); A group of central tables (5) are arranged at the annular center of the primary turntable (1), and a plurality of groups of measuring frames (6) are evenly arranged on the central table (5) along its circumference. The plurality of groups of measuring frames (6) are arranged in a one-to-one correspondence with the secondary turntable (2), and when the secondary turntable (2) rotates with the primary turntable (1) to the bottom of the corresponding measuring frames (6), except for the measuring frames (6) above the secondary turntable (2) aligned with the loading station and the unloading station, a group of measuring groups (7) are installed. The measuring groups (7) installed on different measuring frames (6) are used to perform synchronous pressure tests of different weight levels on pressure sensors (8) at different positions. The secondary turntable (2) is also used to rotate the clamped carrier (9) to the bottom of the measuring frame (6) to cooperate with the measuring group (7) to perform pressure tests on the pressure sensors (8) on the carrier (9). The primary turntable (1) is used to synchronously drive the plurality of groups of secondary turntables (2) to be alternately placed under the measuring groups (7) for synchronous testing.

2. A test fixture for detecting a pressure sensor according to claim 1, characterized in that: The positioning clamp (3) is an elastic positioning clamp (3), which comprises a central axis (31) positioned on the secondary turntable and two groups of clamping S arc segments (32) sleeved on the central axis (31); a group of clamping openings formed by the intersection of the two groups of clamping S arc segments (32) is the open end of the positioning clamp (3), which is used to hold the carrier (9) for positioning and loading; another group of clamping openings formed by the intersection of the two groups of clamping S arc segments (32) is provided with an elastic top pressing piece, and the elastic top pressing piece comprises a guide cylinder (33) fixed on the secondary turntable and a guide cylinder (33) placed on the guide cylinder (33). The spring (34) is fixed in the guide tube (33), and the two ends of the spring (34) are connected to the ends of the two groups of clamping S arc segments (32) through pull rings. When the discharge end (4) of the vibrating plate is feeding toward the opening end of the positioning clamp (3), the carrier (9) with a circular outer contour expands outward to press the two groups of clamping S arc segments (32), driving the ends of the two groups of clamping S arc segments (32) to stretch the spring (34), and when the carrier (9) is completely placed in the clamping opening of the two groups of clamping S arc segments (32), the spring (34) is in a stretched state.

3. A test fixture for detecting a pressure sensor according to claim 2, characterized in that: The carrier (9) is also provided with a ring-shaped clamping groove (35) on its periphery, and the clamping openings of the two groups of clamping S arc segments (32) are clamped in the clamping groove (35) for clamping positioning.

4. A test fixture for detecting a pressure sensor according to claim 3, characterized in that: The clamping mouth ends of the two groups of clamping S arc segments (32) are also provided with outwardly expanding arc surface segments (36).

5. A test fixture for detecting a pressure sensor according to any one of claim 1, characterized in that: A group of receiving grooves (10) aligned with the positioning clamps (3) are arranged at the unloading station, and a group of mounting platforms fixed on the primary turntable (1) are arranged at the central slot hole of the secondary turntable (2), and a group of pushing cylinders (21) are installed on the mounting platforms. The driving end of the positioning cylinder is used to push the carrier (9) in the clamping mouth into the receiving groove (10).

6. A test fixture for detecting a pressure sensor according to any one of claims 1 to 5, characterized in that: The test group comprises a tray (71) connected to the bottom of the test frame through a lifting support frame, and a weight (72) is placed on the tray (71), and the weights (72) of different test groups are different in weight. When a carrier (9) on a group of secondary turntables (2) rotates to the bottom of the tray (71), the lifting support frame is used to drive the tray (71) to descend, so that the tray (71) freely hangs and supports the pressure sensor (8) in the carrier (9) to test and apply pressure to the pressure sensor (8), and after the pressure sensor (8) completes the test, the lifting support frame then drives the tray (71) to rise, so that the secondary turntable (2) continues to rotate.

7. A test fixture for detecting a pressure sensor according to claim 6, characterized in that: The lifting support frame comprises at least three groups of columnar rod frames (73) connected to the bottom of the test frame and distributed in a circumferential direction. A group of central axis slideways (74) are provided at the center of the columnar rod frames (73). A plurality of edge slideways (75) penetrating the central axis slideway (74) are provided around the columnar rod frames (73). A group of nut blocks (76) are guided and installed in the central axis slideway (74). A group of unit blocks connected to the nut blocks (76) are guided and installed in each group of edge slideways (75). (77), the side curved surfaces (78) of the multiple groups of unit blocks (77) extending out of the columnar rod frame (73) are the curved surfaces where a group of conical surfaces are located, and a group of screw rods (79) are also threadedly connected in the nut block (76), and the screw rods (79) are installed in the test frame through connection, and the upper part of the extended side frame is also connected to an external gear (710), and the tray (71) is provided with an inner conical surface (711) that matches the side curved surface (78) of the unit block (77).

8. A test fixture for detecting a pressure sensor according to claim 7, characterized in that: The test stand is also connected with a set of transition swivels (712), the inner ring of the transition swivel (712) is provided with an inner gear ring (713) which is synchronously meshed with multiple sets of external gears (710), the outer ring of the transition swivel (712) is also provided with an outer gear ring (714), a test synchronous motor (715) is installed on the central table (5), the driving end of the test synchronous motor (715) is connected with a set of drive swivels (716), the drive swivels (716) are connected and installed on the central table (5), and the outer ring of the drive swivels (716) is also provided with a matching gear ring (717) which is meshed with the outer gear ring (714).

9. A test fixture for detecting a pressure sensor according to claim 8, characterized in that: The outer ring of the primary turntable (1) is provided with a group of primary gear rings (11); a group of primary drive motors mesh with the primary gear rings (11) through a driving end to realize the rotation of the primary turntable (1); the outer ring of the secondary turntable (2) is provided with a group of secondary gear rings (12); a group of transfer rotating rings (13) are installed on the primary turntable (1); a group of transfer motors (14) are fixedly installed on the primary turntable (1); the outer ring of the transfer rotating ring (13) is provided with a first transfer gear ring (15) meshed with the secondary gear ring (12); and the inner ring of the transfer rotating ring (13) is provided with a second transfer gear ring (16) meshed with the driving end of the transfer motor (14).

Images