Pressure sensor calibration testing device

Abstract

The invention relates to the technical field of sensor equipment, and discloses a pressure sensor calibration testing device which comprises a supporting table, a supporting bottom plate and a plurality of supporting legs, symmetrical positioning parts are arranged on the two sides of the center of the top of the supporting bottom plate, and a mounting base is arranged between the positioning parts and located in the center of the upper portion of the supporting table. A plurality of auxiliary parts are arranged on the mounting seat, pressure sensor bodies are clamped on the auxiliary parts, and a supercharging device is arranged above the pressure sensor bodies and is mounted on one side of the top of the supporting table; a plurality of elastic mechanisms are arranged on the supercharging device, each elastic mechanism comprises a first U-shaped frame, the first U-shaped frame is of an inverted U-shaped structure, a left side groove and a right side groove are formed in the two sides of the first U-shaped frame respectively, a back plate is arranged on the back face of the first U-shaped frame, and a full gear is arranged on the inner side of the back plate and located on the lower portion in the U-shaped groove of the first U-shaped frame. The beneficial effects are that the detection comprehensiveness is increased, and a plurality of pressure sensors can be detected at one time.

Description

Technical Field

[0001] The present invention relates to the technical field of sensor devices, and more specifically, to a pressure sensor calibration test device. 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. A pressure sensor usually consists of a pressure-sensitive element and a signal processing unit. According to different types of measured pressures, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors, and absolute pressure sensors. Pressure sensors are the most commonly used type of sensor in industrial practice and are widely used in various industrial automation environments, covering many industries such as water conservancy and hydropower, and railway transportation.

[0003] Currently, when automatically testing a pressure sensor, only one location of the pressure sensor can be automatically tested through a lifting device. However, since there are errors in the pressure detection data at various locations on the pressure sensor, and the structural method cannot test the pressure at different positions on the same pressure sensor, it is easy to cause relatively large errors, affecting the pressure detection data. At the same time, in the existing pressure sensor pressure testing, only one sensor can be tested at a time, and multiple pressure sensors cannot be detected simultaneously, which increases the labor and processes of detection and greatly reduces the detection efficiency. Summary of the Invention

[0004] The technical task of the present invention is to provide a pressure sensor calibration test device to solve the above problems in view of the above deficiencies.

[0005] The technical solution of the present invention is realized as follows:

[0006] A pressure sensor calibration test device includes a support table, a support bottom plate, and several support feet. Symmetrical positioning parts are provided on both sides at the center of the top of the support bottom plate. An installation seat is provided at the center above the support table between the positioning parts. Several auxiliary parts are provided on the installation seat, and pressure sensor bodies are clamped on the auxiliary parts. A pressurizing device is provided above the pressure sensor bodies, and the pressurizing device is installed on one side of the top of the support table; several elastic mechanisms are provided on the pressurizing device. The elastic mechanism includes a first U-shaped frame. The first U-shaped frame is an inverted U-shaped structure. A left groove and a right groove are respectively provided on both sides of the first U-shaped frame. A back plate is provided on the back of the first U-shaped frame. A full gear is provided below the U-shaped groove of the first U-shaped frame on the inner side of the back plate. A first side gear that meshes with the full gear is provided on the left side of the full gear at the left side of the U-shaped groove of the first U-shaped frame. An upper cylinder is provided at the center of the bottom of the first U-shaped frame. A lower cylinder is provided below the upper cylinder. A second U-shaped frame is provided at the bottom of the lower cylinder. Both sides of the second U-shaped frame are inserted into the left groove and the right groove. A second side gear that meshes with the full gear is provided on the right side of the second U-shaped frame corresponding to one side of the full gear. A second return spring is sleeved between the upper cylinder and the lower cylinder.

[0007] Preferably, a first top block is provided at the center of the top of the first U-shaped frame. The first top block is fixed on the pressurizing device. Convex strips are provided longitudinally in the middle of the inner walls of the left groove and the right groove. Convex strip chutes that cooperate with the convex strips are provided at the center of the side edges of both sides of the second U-shaped frame; an upper cushion block is provided at the top of the upper cylinder. The top of the upper cushion block is fixed on the bottom of the first U-shaped frame. A lower cushion block is provided at the bottom of the lower cylinder. The bottom of the lower cushion block is fixed at the bottom of the U-shaped groove of the second U-shaped frame.

[0008] Preferably, the pressurizing device includes a support box body. Side columns are provided on both sides of the top of the support box body. Second top blocks are provided at the tops of the side columns. A front plate and a rear plate are respectively provided between the two sides of the side columns. A cavity is formed between the front plate and the rear plate. A driving part is provided in the cavity. Tracks are provided at the lower parts of both sides of the front plate away from the side columns. Slider ones that cooperate with the tracks are provided on the tracks. A cross plate is horizontally provided between the sides of the slider ones away from the tracks. A bottom block is provided at the center of the bottom of the cross plate. An upper beam plate is provided at the lower part of the side of the bottom block away from the cross plate. Several pressure-applying columns are provided at the bottom of the upper beam plate. A lower beam plate is provided below the pressure-applying columns. Several cylinders are provided at the bottom of the lower beam plate. The pressure-applying columns penetrate through the cylinders. A first return spring is sleeved between the upper beam plate and the lower beam plate on the pressure-applying columns; a limiting lifting part is provided at the lower part of the side of the side column. The limiting lifting part is connected to the side of the cross plate.

[0009] Preferably, the limiting lifting part includes a fixing plate. The fixing plate is fixed at the lower part of the side of the side column. A lifting groove is provided in the middle of the fixing plate. A slider two that cooperates with the lifting groove is provided in the lifting groove. A lifting column is provided on the outer side of the slider two. A connecting column is provided on the front side of the lifting column. An L-shaped frame is provided on the side of the connecting column away from the lifting column. The side of the L-shaped frame is fixed at the center of the side of the cross plate.

[0010] Preferably, the driving part includes a driver which is installed at the center of the lower side of the rear plate. A shaft is connected to the output end of the driver. The shaft penetrates through the rear plate. A main pulley is provided on the side of the shaft away from the driver. A secondary pulley is provided above the main pulley. The secondary pulley is connected to the main pulley by a belt. A pulley shaft is inserted through the middle of the secondary pulley. One end of the pulley shaft is connected to the center of the upper part of the inner side of the rear plate. The other end of the pulley shaft penetrates through the front plate. An eccentric wheel is provided at the end of the pulley shaft away from the rear plate. A cam is provided on the side of the eccentric wheel away from the pulley shaft. An insertion shaft is inserted through the lower part of the cam. The inner side of the insertion shaft is connected to the center of the upper part of the front side of the cross plate.

[0011] Preferably, a plurality of mounting grooves are provided on the mounting base. A through hole is provided on one side inside the mounting groove. The pressure sensor body is located inside the mounting groove. The auxiliary part includes a disc which is located inside the mounting groove. A connecting column I is provided at the bottom of the disc. The connecting column I penetrates through the through hole. An inverted solid conical column is provided at the bottom of the connecting column I. A connecting column II is provided at the center of the bottom of the inverted solid conical column. A sphere is provided at the bottom of the connecting column II. An inverted hollow conical column is provided at the bottom of the sphere. A connecting column III is provided at the center of the bottom of the inverted hollow conical column. The bottom of the connecting column III is arranged on the top of the support bottom plate. A connecting part is provided between the mounting groove and the cylinder.

[0012] Preferably, the connecting part includes a first positioning ring. A convex ring is provided on the top of the first positioning ring at the side of the center ring. The pressure sensor body is located inside the convex ring and the first positioning ring. Cylinders are provided on both sides of the top of the first positioning ring. A piston rod which is matched with the cylinder is arranged inside the cylinder. The piston rod penetrates through the cylinder. A second positioning ring is provided at the top of the piston rod. The second positioning ring is sleeved on the cylinder. A spring is sleeved on the piston rod between the second positioning ring and the cylinder.

[0013] Preferably, a plurality of fastening holes are provided on the convex ring. Fastening screws are inserted through the fastening holes. A plurality of fixing holes I are provided on the right side of the first positioning ring. A plurality of fixing holes II are provided on the mounting base corresponding to the sides of the fixing holes. Fasteners are arranged inside the fixing holes I.

[0014] Preferably, notch openings in a hollowed-out style are provided on both sides of the support platform and on both sides of the mounting base; the positioning portion includes a hydraulic cylinder, in which a matching hydraulic rod is provided. The hydraulic rod penetrates through the hydraulic cylinder, and a convex block is provided at the top of the hydraulic rod. An installation bracket is provided on one side of the convex block. A central clamping groove is provided at the center of the side of the installation bracket corresponding to the convex block. Driving arms II are provided on both sides of the convex block close to the central clamping groove. The driving arms II penetrate through the notch openings. Positioning pressing blocks are provided at the upper parts of the corresponding sides of the driving arms II. Driving arms I are provided at the centers of both sides of the positioning pressing blocks. Inverted T-shaped seats are provided at the lower parts of the corresponding sides of the driving arms I. The bottom of the inverted T-shaped seat is fixed on one side of the top of the hydraulic cylinder. A connecting shaft is horizontally arranged between the middle parts of the driving arms I. Driving arms III are provided at both ends of the connecting shaft. The other ends of the driving arms III are movably connected to the side of the convex block far from the driving arm II.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0016] 1. A plurality of pressure sensors are installed on the mounting base assembly. The plurality of pressure sensors are connected to a detection device on one side. A pressurizing device is provided above the pressure sensors. A positioning portion is provided on the side of the mounting base member. The mounting base is positioned and fixed through the positioning portion. The plurality of pressure sensors are simultaneously pressurized and detected through the upper pressurizing device. Among them, an elastic mechanism is linked to the pressurizing device. When the elastic mechanism receives pressure, the force generated by pressurization is transmitted to the pressure sensors along the Y-axis. Under the movement pressure with the Y-axis downward remaining unchanged, when the pressure sensors change in angle due to different external factors, the supporting point surface formed between the pressure sensors and the mounting base will change. The force transmitted down along the Y-axis above detects different contact surfaces of the pressure sensors, improving the accuracy of detection. And according to different factors, different contact points of the pressure sensors are effectively detected, thereby increasing the comprehensiveness of detection and enabling multiple pressure sensors to be detected at one time.

[0017] 2. A plurality of elastic mechanisms are provided between the upper beam plate and the lower beam plate. After the elastic mechanisms receive the pressure from above and downward, the elastic mechanisms will be compressed, prompting the distance of the disconnection in the force transmission path to shorten. The force received by the elastic mechanisms will not spread around due to the excessive fault distance, maintaining the vertical path on the Y-axis, thereby increasing the stability of the entire pressurization.

[0018] 3. When the elastic mechanisms are pressed by the upward pressure and press the lower beam plate, when a downward force is generated above the lower beam plate, several cylinders connected to the bottom will press downward, improving the comprehensiveness of detection. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 is the overall structural schematic diagram according to the embodiment of the present invention;

[0021] Figure 2 is the structural schematic diagram of the supercharging device according to the embodiment of the present invention;

[0022] Figure 3 is the structural schematic diagram of the connecting portion according to the embodiment of the present invention;

[0023] Figure 4 is the explosion of the auxiliary part according to the embodiment of the present invention Figure 1 ;

[0024] Figure 5 is the explosion of the auxiliary part according to the embodiment of the present invention Figure 2 ;

[0025] Figure 6 is the structural schematic diagram of the cylinder block according to the embodiment of the present invention;

[0026] Figure 7 is the structural schematic diagram of the positioning portion according to the embodiment of the present invention;

[0027] Figure 8 is the structural schematic diagram of the first positioning ring according to the embodiment of the present invention;

[0028] Figure 9 is the structural schematic diagram of the connection between the elastic mechanism and the beam plate according to the embodiment of the present invention;

[0029] Figure 10 is the structural schematic diagram of the elastic mechanism according to the embodiment of the present invention;

[0030] Figure 11 is the exploded view of the elastic mechanism according to the embodiment of the present invention.

[0031] In the figure:

[0032] 1. Support platform; 2. Support bottom plate; 3. Support feet; 4. Positioning part; 5. Mounting seat; 6. Booster device; 7. Elastic mechanism; 8. First U-shaped frame; 9. Left slot; 10. Right slot; 11. Back plate; 12. Full gear; 13. First side gear teeth; 14. Upper cylinder; 15. Lower cylinder; 16. Second U-shaped frame; 17. Second side gear teeth; 18. Return spring two; 19. First top block; 20. Rib; 21. Rib chute; 22. Upper cushion block; 23. Lower cushion block; 24. Support box body; 25. Side column; 26. Second top block; 27. Front plate; 28. Rear plate; 29. Track; 30. Cross plate; 31. Bottom block; 32. Upper beam plate; 33. Pressing column; 34. Lower beam plate; 35. Cylinder; 36. Return spring one; 37. Fixed plate; 38. Lifting slot; 39. First slider; 40. Lifting column; 41. Connecting column four; 42. L-shaped frame; 43. Main pulley; 44. Secondary pulley; 45. Belt; 46. Eccentric wheel; 47. Cam; 48. Mounting slot; 49. Through hole; 50. Disc; 51. Connecting column one; 52. Inverted solid conical column; 53. Connecting column two; 54. Sphere; 55. Inverted hollow conical column; 56. Connecting column three; 57. First positioning ring; 58. Convex ring; 59. Cylinder block; 60. Piston rod; 61. Second positioning ring; 62. Spring; 63. Tightening screw; 64. Notch; 65. Hydraulic cylinder; 66. Hydraulic rod; 67. Convex block; 68. Mounting frame; 69. Central clamping groove; 70. Driving arm two; 71. Positioning press block; 72. Driving arm one; 73. Inverted T-shaped seat; 74. Connecting shaft; 75. Driving arm three. Detailed implementation manners

[0033] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] According to an embodiment of the present invention, as shown in Figures 1 - 11 shown:

[0036] The present invention provides a calibration test device for a pressure sensor, comprising a support table 1, a support bottom plate 2 and a plurality of support feet 3; support feet 3 are provided at four end portions of the bottom of the support table 1, and the support bottom plate 2 is located between the support feet 3. Symmetrical positioning portions 4 are provided on both sides at the central position of the top of the support bottom plate 2, and a mounting seat 5 is provided at the center above the support table 1 between the positioning portions 4. The size of the mounting seat 5 can be set according to requirements, and the installation positions of the two sides of the positioning portions 4 are adjusted according to the size of the mounting seat 5. The positioning portions 4 are mainly used to clamp and position both sides of the mounting seat 5 to keep the mounting seat 5 in a defined position. A plurality of auxiliary portions are provided on the mounting seat 5, and pressure sensor bodies are clamped on the auxiliary portions. A pressurizing device 6 is provided above the pressure sensor bodies. The pressurizing device 6 is installed on one side of the top of the support table 1, and a detection device is provided on the pressurizing device 6. The detection device facilitates pressure detection of the pressure sensor bodies on the auxiliary portions. Among them, the detection device here is a conventional structure and will not be elaborated herein.

[0037] A plurality of elastic mechanisms 7 are provided on the pressurizing device 6, such as Figures 9 - 11As shown in the figure, the elastic mechanism 7 includes a first U-shaped frame 8. The first U-shaped frame 8 is an inverted U-shaped structure. On both sides of the first U-shaped frame 8, there are a left slot 9 and a right slot 10 respectively. On the back of the first U-shaped frame 8, there is a back plate 11. Inside the back plate 11, at the lower part inside the U-shaped slot of the first U-shaped frame 8, there is a full gear 12. On the left side of the full gear 12, at the left side of the U-shaped slot of the first U-shaped frame 8, there is a first side gear tooth 13 that meshes with it. At the center of the bottom of the first U-shaped frame 8, there is an upper cylinder 14. Below the upper cylinder 14, there is a lower cylinder 15. At the bottom of the lower cylinder 15, there is a second U-shaped frame 16. The two sides of the second U-shaped frame 16 are inserted into the left slot 9 and the right slot 10. On the right side of the second U-shaped frame 16, corresponding to one side of the full gear 12, there is a second side gear tooth 17 that meshes with the full gear 12. A second return spring 18 is sleeved between the upper cylinder 14 and the lower cylinder 15. At the center of the top of the first U-shaped frame 8, there is a first top block 19. The first top block 19 is fixed on the pressurizing device 6. In the longitudinal middle of the inner walls of the left slot 9 and the right slot 10, there are convex strips 20. At the center of the side edges of both sides of the second U-shaped frame 16, there are convex strip chutes 21 that cooperate with the convex strips 20. At the top of the upper cylinder 14, there is an upper cushion block 22. The top of the upper cushion block 22 is fixed on the bottom of the first U-shaped frame 8. At the bottom of the lower cylinder 15, there is a lower cushion block 23. The bottom of the lower cushion block 23 is fixed at the bottom of the U-shaped slot of the second U-shaped frame 16. Among them, the left side of the left slot 9 is an open structure. The right side of the left slot 9 is a plate surface. On this plate surface, there is the first side gear tooth 13. The first side gear tooth 13 just meshes with the full gear 12 arranged in the middle. A gear shaft is inserted through the center of the full gear 12. One side of the gear shaft is connected to the back plate 11. The gear shaft at this place can also be connected with a battery. The battery can be arranged on the back surface of the back plate 11, or it can not be connected to the battery. Directly under the action of the downward force generated above, it presses the first U-shaped frame downward. When the first U-shaped frame moves downward, the first side gear tooth 13 inside will drive the full gear 12 to rotate. The full gear 12 will further drive the second side gear tooth 17 meshing on the right side, prompting the first side gear tooth 13 and the second side gear tooth 17 to slide in opposite directions. In this way, when applying pressure to the pressure sensor body, the stability in the Y-axis transmission between the upper beam plate 32 and the lower beam plate 34 is maintained. When the pressurizing device 6 acts in cooperation with the elastic mechanism 7 during the pressurizing process, the whole structure remains in a certain stability, equivalent to being in a static state.

[0038] The pressurizing device 6 includes a support box body 24. According to Figure 2As shown in the figure, side columns 25 are provided on both sides of the top of the support box body 24. Top blocks two 26 are provided at the tops of the side columns 25. A front plate 27 and a rear plate 28 are respectively provided between the two sides of the side column 25. A cavity is formed between the front plate 27 and the rear plate 28, and a driving part is provided in the cavity. Lower parts on both sides of the side of the front plate 27 away from the side column 25 are provided with tracks 29. The front sides of both sides of the front plate 27 are provided with convex plates protruding forward, and the tracks 29 are installed on the tracks 29. A first slider 39 is provided on the track 29. A cross plate 30 is horizontally arranged between the sides of the first slider 39 away from the track 29. A bottom block 31 is provided at the center of the bottom of the cross plate 30. A upper beam plate 32 is provided at the lower part of the side of the bottom block 31 away from the cross plate 30. A plurality of pressing columns 33 are provided at the bottom of the upper beam plate 32. A lower beam plate 34 is provided below the pressing columns 33. A plurality of cylinders 35 are provided at the bottom of the lower beam plate 34. The pressing columns 33 penetrate through the cylinders 35. A first return spring 36 is sleeved on the pressing columns 33 between the upper beam plate 32 and the lower beam plate 34. A limiting lifting part is provided at the lower part of the side of the side column 25, and the limiting lifting part is connected to the side of the cross plate 30.

[0039] The limiting lifting part includes a fixing plate 37. The fixing plate 37 is fixed at the lower part of the side of the side column 25. A lifting groove 38 is provided in the middle of the fixing plate 37. A second slider is provided in the lifting groove 38. A lifting column 40 is provided on the outside of the second slider. A fourth connecting column 41 is provided on the front side of the lifting column 40. An L-shaped frame 42 is provided on the side of the fourth connecting column 41 away from the lifting column 40. The side of the L-shaped frame 42 is fixed at the center of the side of the cross plate 30.

[0040] The driving part includes a driver which is installed at the center of the lower side of the rear plate 28. A shaft is connected to the output end of the driver and penetrates through the rear plate 28. A main pulley 43 is provided on the side of the shaft away from the driver. A secondary pulley 44 is provided above the main pulley 43. The secondary pulley 44 is connected to the main pulley 43 by a belt 45. A pulley shaft is inserted through the middle of the secondary pulley 44. One end of the pulley shaft is connected to the center of the upper inner side of the rear plate 28, and the other end of the pulley shaft penetrates through the front plate 27. An eccentric wheel 46 is provided at the end of the pulley shaft away from the rear plate 28. A cam 47 is provided on the side of the eccentric wheel 46 away from the pulley shaft. An insertion shaft is inserted through the lower part of the cam 47, and the inner side of the insertion shaft is connected to the center of the upper front side of the cross plate 30. A round hole is provided at the center of the upper part of the front plate 27, and the pulley shaft penetrates through the round hole. After the eccentric wheel 46 rotates driven by the pulley shaft, the cam 47 connected to the front side of the eccentric wheel 46 will generate a trajectory of rotating up and down with the rotational movement, and the cam 47 will pull the lower-connected cross plate 30 to lift and lower. Among them, the lower beam plate 34 and the pressure application column 33 are movably connected. When the cylinder 35 presses on the top surface of the pressure sensor body, the contact area between the cylinder 35 and the top surface of the pressure sensor body is relatively large. When the downward force continues to be applied, the pressure application column 33 will continue to apply pressure downward. In this way, the pressure application column 33 will press on the center point of the top surface of the lower pressure sensor body, and the force at the center point will increase. The different pressure data generated by the cylinder 35 and the pressure application column 33 are respectively transmitted to the detection device connected to the side. The detection device can be installed on the side of the side column 25 or can be separately provided on the support table 1, mainly for detecting the pressure generated by the pressure application, and the detected data is stored or displayed on the connected display screen.

[0041] A plurality of mounting grooves 48 are provided on the mounting seat 5. A through hole 49 is provided on one side of the mounting groove 48. The pressure sensor body is located in the mounting groove 48; the auxiliary part includes a disc 50, which can be based on Figures 3 - 6As shown in the figure, the disc 50 is located within the mounting groove 48. A first connecting post 51 is provided at the bottom of the disc 50. The first connecting post 51 passes through the through hole 49. The aperture of the through hole 49 is larger than the cross-sectional dimension of the first connecting post 51. A reverse solid conical post 52 is provided at the bottom of the first connecting post 51. A second connecting post 53 is provided at the center of the bottom of the reverse solid conical post 52. A sphere 54 is provided at the bottom of the second connecting post 53. A reverse hollow conical post 55 is provided at the bottom of the sphere 54. A third connecting post 56 is provided at the center of the bottom of the reverse hollow conical post 55. The bottom of the third connecting post 56 is disposed on the top of the support base plate 2; A connecting portion is provided between the mounting groove 48 and the cylinder 35. The connecting portion includes a first positioning ring 57. A convex ring 58 is provided on the side of the top of the first positioning ring 57 located at the center ring; The pressure sensor body is located within the convex ring 58 and the first positioning ring 57; Cylinders 59 are provided on both sides of the top of the first positioning ring 57. A piston rod 60 that mates with each other is provided within the cylinder 59. The piston rod 60 passes through the cylinder 59. A second positioning ring 61 is provided at the top of the piston rod 60. The second positioning ring 61 is sleeved on the cylinder 35; A spring 62 is sleeved on the piston rod 60 between the second positioning ring 61 and the cylinder 59. A number of fastening holes are provided on the convex ring 58. Fastening screws 63 are inserted within the fastening holes; A number of first fixing holes are provided on the right side of the first positioning ring 57. A number of second fixing holes are provided on the mounting base 5 corresponding to the sides of the fixing holes. Fasteners are provided within the first fixing holes. The mounting base 5 and the support platform 1 have a movable structure. The length dimension of the mounting base 5 can be adjusted according to requirements. When the pressure sensor body is subjected to a downward pressure, the pressure sensor body will press against the disc 50. There is a spacing between the bottom of the disc 50 and the bottom wall of the mounting groove 48. After the disc 50 is subjected to pressure, the disc 50 will press against the second connecting post 53. Since the sphere 54 and the inner wall of the reverse hollow conical post 55 have a movable structure, the sphere 54 will displace on the inner wall of the reverse hollow conical post 55, and the top surface of the pressure sensor body will tilt. Among them, under the influence of the first positioning ring 57, the tilt angle of the inclined surface at this location will only change slightly. In this way, under the limit of the auxiliary portion of the pressure sensor body, the point or surface in contact with the pressure application on the top surface will change. Regarding the components at this location as the motion state and cooperating with the upper part as the static state, the pressure sensor is subjected to pressure detection.

[0042] On both sides of the support platform 1 and on both sides of the mounting base 5, hollowed-out notches 64 are provided. The positioning portion 4 includes a hydraulic cylinder 65. According to Figure 1 and Figure 7As shown, a hydraulic rod 66 is arranged inside a hydraulic cylinder 65, and the hydraulic rod 66 penetrates through the hydraulic cylinder 65. A convex block 67 is arranged at the top of the hydraulic rod 66. An installation bracket 68 is arranged on one side of the convex block 67. A central clamping groove 69 is arranged at the center of the side corresponding to the convex block 67 on the installation bracket 68. Driving arms II 70 are arranged on both sides of the convex block 67 close to the central clamping groove 69. The driving arms II 70 penetrate through the notch 64. Positioning pressing blocks 71 are arranged at the upper parts of the corresponding sides of the driving arms II 70. Driving arms I 72 are arranged at the centers of both sides of the positioning pressing blocks 71. Inverted T-shaped seats 73 are arranged at the lower parts of the corresponding sides of the driving arms I 72. The bottom of the inverted T-shaped seat 73 is fixed on one side of the top of the hydraulic cylinder 65. A connecting shaft 74 is horizontally arranged between the middle parts of the driving arms I 72. Driving arms III 75 are arranged at both ends of the connecting shaft 74. The other ends of the driving arms III 75 are movably connected to one side of the convex block 67 far from the driving arms II 70. A hollow notch 64 is arranged on the supporting platforms 1 on both sides of the mounting seat 5. The driving arms pass through the notch 64. The top surface of the installation bracket 68 is fixed on the bottom surface of the supporting platform 1. The bottom of the installation bracket 68 is fixed on one side of the top of the hydraulic cylinder 65. An inverted T-shaped seat 73 is arranged on the other side of the top of the hydraulic cylinder 65. After the hydraulic cylinder 65 and the hydraulic rod 66 produce telescopic movement, the hydraulic rod 66 will push the convex block 67 upward, further driving the positioning pressing block 71 to pass through the notch 64 and press the tops of both sides of the mounting seat 5, positioning the mounting seat 5 on the supporting platform 1 and maintaining the stability between the mounting seat 5 and the supporting platform 1. The positioning pressing block 71 folds and retracts into the central clamping groove 69 along with the hydraulic rod 66, playing a role of storage.

[0043] Detailed usage method and function of this embodiment:

[0044] Manufacture a mounting seat 5 with a suitable length, place the pressure sensor body to be detected in the mounting groove 48, the bottom of the pressure sensor body presses against the disc 50, the upper part of the pressure sensor body passes through the first positioning ring 57, and fasten the first positioning ring 57 on the mounting seat 5 through a plurality of fasteners. At the same time, clamp the pressure sensor body inside the convex ring 58 by tightening a plurality of fastening screws 63, so that the pressure sensor body is limited inside it. At this time, the cylinder block 59 and the piston rod 60 are in a tensile state.

[0045] Then drive the hydraulic cylinder 65 and the hydraulic rod 66 to cause telescopic movement between them, so that the hydraulic rod 66 pushes the convex block 67 upward, and the convex block 67 will push the positioning pressing block 71 upward. When the positioning pressing block 71 is pushed upward, it will drive the driving arms II 70 and the driving arms III 75 respectively connected to both ends of the side. After the lower part of the driving arm II 70 moves upward, the top of the driving arm II 70 will push the right side of the positioning pressing block 71 (as Figure 7Upward, the right end of the third driving arm 75 moves upward under the push of the bump 67. As a result, the left end of the third driving arm 75 will drive the first driving arm 72 to rotate at an angle, causing the top of the first driving arm 72 to drive the side of the positioning press block 71 near the center to move downward. In this way, the positioning press block 71 will penetrate the notch 64 and press the mounting seat 5 on the upper side, positioning and clamping the upper side edge of the mounting seat 5, making the clamping between the mounting seat 5 and the support table 1 stable.

[0046] Further, the driver is operated, and the driver drives the main pulley 43 to rotate. After the main pulley 43 rotates, it drives the secondary pulley 44 to rotate through the belt 45. The secondary pulley 44 drives the eccentric wheel 46 to rotate through the pulley shaft. During the rotation of the eccentric wheel 46, it will drive the cam 47 connected to the side end. The cam 47 will pull the cross plate 30 connected to the bottom. The cross plate 30 moves up and down under the limit between the first slider 39 connected to both side ends and the track 29. During this period, the lifting column 40 will also be driven by the L-shaped frame 42, causing the second slider connected to the side to slide up and down in the lifting groove 38. After the cross plate 30 moves up and down, it will press the upper beam plate 32 downward. The upper beam plate 32 presses several pressure columns 33 at the bottom. The pressure columns 33 drive the lower sleeved cylinder 35 to press downward. The cylinder 35 presses the corresponding pressure sensor body below. After being pressed by the cylinder 35, the pressure sensor body is pressed into the installation groove 48, and the piston rod 60 extends into the cylinder block 59. At the same time, when the pressure received by the upper beam plate 32 is still in the pressing state, the cylinder 35 presses the top surface of the pressure sensor body and remains stationary. Then, after the pressure column 33 receives the downward pressure, the pressure column 33 will pass through the lower beam plate 34 and the cylinder 35 and press the top center of the pressure sensor body. The pressure at the center of the pressure sensor body will increase, converting the pressure receiving surface of the applied pressure into a receiving point. Since there is a certain distance between the disc 50 and the bottom wall of the installation groove 48, when the disc 50 receives the downward pressure from above, the disc 50 will press the first connecting column 51. The first connecting column 51 presses the inverted solid conical column 52 below. The inverted solid conical column 52 presses the second connecting column 53 connected to the bottom. The second connecting column 53 presses the sphere 54. Since the sphere 54 is in contact with the inner wall of the inverted hollow conical column 55, when the sphere 54 receives the downward pressure, under a certain vertical force, the sphere 54 will slide. When the sphere 54 slides, the disc 50 and the pressure sensor body above will tilt together. In this way, the contact point between the pressing point where the pressure column 33 presses downward and the top surface of the pressure sensor body will change. Here, it is mainly to detect the pressure on different contact points of the pressure sensor body when the pressure applied by the pressure column 33 downward is greater than a certain range of the cylinder 35.

[0047] When the upper beam plate 32 is pressed downward, the upper beam plate 32 will press on the first U-shaped frame 8. When the first side gear teeth 13 on the inner side of the first U-shaped frame 8 move downward and backward, they will drive the rotation of the full gear 12 connected in the middle. After the full gear 12 rotates, it will drive the second side gear teeth 17 on the right inner core. The second side gear teeth 17 will move upward, and the second U-shaped frame 16 will slide upward into the left slot 9 and the right slot 10. The convex strip 20 will slide in the convex strip chute 21, and the distance between the upper column body 14 and the lower column body 15 will become smaller. After the fault distance during the force transmission process becomes smaller, the force on the Y-axis will disperse around and remain on the same vertical plane. Thus, when the pressure sensor body is performing a pressing operation, the stability of the downward force applied from above can be maintained.

[0048] Through the above specific implementation manners, those skilled in the technical field can easily implement the present invention. However, it should be understood that the present invention is not limited to the above specific implementation manners. Based on the disclosed implementation manners, those skilled in the technical field can arbitrarily combine different technical features to implement different technical solutions.

Claims

1. A pressure sensor calibration test device, comprising a support table (1), a support bottom plate (2) and a plurality of support feet (3); It is characterized in that On both sides of the center position at the top of the support bottom plate (2), symmetric positioning parts (4) are provided. Between the positioning parts (4), at the center above the support table (1), an installation seat (5) is provided. A plurality of auxiliary parts are provided on the installation seat (5), and a pressure sensor body is clamped on each auxiliary part. Above the pressure sensor body, a pressurizing device (6) is provided, and the pressurizing device (6) is installed on one side of the top of the support table (1); A plurality of elastic mechanisms (7) are provided on the pressurizing device (6). The elastic mechanism (7) includes a first U-shaped frame (8). The first U-shaped frame (8) is of an inverted U-shaped structure. On both sides of the first U-shaped frame (8), a left side groove (9) and a right side groove (10) are respectively provided. On the back of the first U-shaped frame (8), a back plate (11) is provided. Inside the back plate (11), below the U-shaped groove of the first U-shaped frame (8), a full gear (12) is provided. On the left side of the full gear (12), at the left side of the U-shaped groove of the first U-shaped frame (8), a first side tooth (13) meshing with it is provided. At the center of the bottom of the first U-shaped frame (8), an upper column body (14) is provided. Below the upper column body (14), a lower column body (15) is provided. At the bottom of the lower column body (15), a second U-shaped frame (16) is provided. Both sides of the second U-shaped frame (16) are inserted into the left side groove (9) and the right side groove (10). On the right side of the second U-shaped frame (16), corresponding to one side of the full gear (12), a second side tooth (17) meshing with the full gear (12) is provided. A second return spring (18) is sleeved between the upper column body (14) and the lower column body (15).

2. The calibration test device for a pressure sensor according to claim 1, characterized in that At the center of the top of the first U-shaped frame (8), a first top block (19) is provided, and the first top block (19) is fixed on the pressurizing device (6). In the longitudinal middle of the inner walls of the left side groove (9) and the right side groove (10), convex strips (20) are provided. At the center of the side edges of both sides of the second U-shaped frame (16), convex strip sliding grooves (21) matching with the convex strips (20) are provided; At the top of the upper column body (14), an upper cushion block (22) is provided, and the top of the upper cushion block (22) is fixed on the bottom of the first U-shaped frame (8). At the bottom of the lower column body (15), a lower cushion block (23) is provided, and the bottom of the lower cushion block (23) is fixed at the bottom of the U-shaped groove of the second U-shaped frame (16).

3. A pressure sensor calibration and testing device according to claim 1, wherein, The supercharging device (6) includes a support box body (24). On both sides of the top of the support box body (24), side columns (25) are provided. On the top of each side column (25), a second top block (26) is provided. Between the two sides of each side column (25), a front plate (27) and a rear plate (28) are respectively provided. A cavity is formed between the front plate (27) and the rear plate (28). A driving part is arranged in the cavity. On the lower parts of both sides of the side away from the side column (25) of the front plate (27), tracks (29) are provided. On the tracks (29), mating first sliders (39) are provided. A cross plate (30) is horizontally arranged between the sides of the first sliders (39) away from the tracks (29). At the center of the bottom of the cross plate (30), a bottom block (31) is provided. On the lower part of the side of the bottom block (31) away from the cross plate (30), an upper beam plate (32) is provided. On the bottom of the upper beam plate (32), a number of pressing columns (33) are provided. Below the pressing columns (33), a lower beam plate (34) is provided. On the bottom of the lower beam plate (34), a number of cylinders (35) are provided. The pressing columns (33) penetrate through the cylinders (35). A first return spring (36) is sleeved on the pressing columns (33) between the upper beam plate (32) and the lower beam plate (34). A limiting lifting part is provided at the lower part of the side of the side column (25), and the limiting lifting part is connected to the side of the cross plate (30).

4. The calibration and testing device for a pressure sensor according to claim 3, characterized in that, The limiting lifting part includes a fixing plate (37). The fixing plate (37) is fixed at the lower part of the side of the side column (25). A lifting groove (38) is provided in the middle of the fixing plate (37). A mating second slider is arranged in the lifting groove (38). A lifting column (40) is arranged on the outside of the second slider. A fourth connecting column (41) is arranged on the front side of the lifting column (40). On the side of the fourth connecting column (41) away from the lifting column (40), an L-shaped frame (42) is provided. The side of the L-shaped frame (42) is fixed at the center of the side of the cross plate (30).

5. A pressure sensor calibration test device according to claim 4, characterized in that, The driving part includes a driver. The driver is installed at the center of the lower part of the side of the rear plate (28). The output end of the driver is connected with a shaft. The shaft penetrates through the rear plate (28). On the side of the shaft away from the driver, a main pulley (43) is provided. Above the main pulley (43), a secondary pulley (44) is provided. The secondary pulley (44) is connected to the main pulley (43) through a belt (45). A pulley shaft is inserted through the middle of the secondary pulley (44). One end of the pulley shaft is connected to the center of the upper part of the inner side of the rear plate (28). The other end of the pulley shaft penetrates through the front plate (27). An eccentric wheel (46) is provided at the end of the pulley shaft away from the rear plate (28). A cam (47) is provided on the side of the eccentric wheel (46) away from the pulley shaft. An insertion shaft is inserted through the lower part of the cam (47). The inner side of the insertion shaft is connected to the center position of the upper part of the front side of the cross plate (30).

6. The calibration test device for a pressure sensor according to claim 5, wherein A number of mounting grooves (48) are provided on the mounting seat (5). A through hole (49) is provided on one side in the mounting groove (48). The pressure sensor body is located in the mounting groove (48). The auxiliary part includes a disc (50) which is located in the mounting groove (48). A connecting post one (51) is provided at the bottom of the disc (50). The connecting post one (51) penetrates through the through hole (49). An inverted solid conical post (52) is provided at the bottom of the connecting post one (51). A connecting post two (53) is provided at the center of the bottom of the inverted solid conical post (52). A sphere (54) is provided at the bottom of the connecting post two (53). An inverted hollow conical post (55) is provided at the bottom of the sphere (54). A connecting post three (56) is provided at the center of the bottom of the inverted hollow conical post (55). The bottom of the connecting post three (56) is arranged on the top of the support base plate (2). A connecting part is provided between the mounting groove (48) and the cylinder (35).

7. The pressure sensor calibration and testing device according to claim 6, wherein The connecting part includes a first positioning ring (57). A convex ring (58) is provided at the top of the first positioning ring (57) on the side of the center ring. The pressure sensor body is located within the convex ring (58) and the first positioning ring (57). Cylinders (59) are provided on both sides of the top of the first positioning ring (57). A piston rod (60) that mates with the cylinder is provided within the cylinder (59). The piston rod (60) penetrates through the cylinder (59). A second positioning ring (61) is provided at the top of the piston rod (60). The second positioning ring (61) is sleeved on the cylinder (35). A spring (62) is sleeved on the piston rod (60) between the second positioning ring (61) and the cylinder (59).

8. A pressure sensor calibration and testing device according to claim 7, characterized in that, A number of fastening holes are provided on the convex ring (58). Fastening screws (63) are inserted into the fastening holes. A number of fixing holes one are provided on the right side of the first positioning ring (57). A number of fixing holes two are provided on the mounting base (5) corresponding to the sides of the fixing holes. Fasteners are provided within the fixing holes one.

9. A pressure sensor calibration and testing device according to claim 1, characterized in that, Hollowed-out notches (64) are provided on both sides of the support platform (1) on both sides of the mounting base (5). The positioning part (4) includes a hydraulic cylinder (65). A hydraulic rod (66) that mates with the hydraulic cylinder is provided within the hydraulic cylinder (65). The hydraulic rod (66) penetrates through the hydraulic cylinder (65). A convex block (67) is provided at the top of the hydraulic rod (66). An installation frame (68) is provided on one side of the convex block (67). A center clamping groove (69) is provided at the center of the side of the installation frame (68) corresponding to the convex block (67). Driving arms two (70) are provided on both sides of the convex block (67) close to the center clamping groove (69). The driving arms two (70) penetrate through the notch (64). A positioning pressing block (71) is provided at the upper part between the driving arms two (70). Driving arms one (72) are provided at the centers of both sides of the positioning pressing block (71). An inverted T-shaped seat (73) is provided at the lower part between the driving arms one (72). The bottom of the inverted T-shaped seat (73) is fixed on one side of the top of the hydraulic cylinder (65). A connecting shaft (74) is horizontally arranged between the middle parts of the driving arms one (72). Driving arms three (75) are provided at both ends of the connecting shaft (74). The other ends of the driving arms three (75) are movably connected to the side of the convex block (67) far from the driving arm two (70).

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