Air bag pressure detection device for thin film sensor

Abstract

The utility model relates to an air bag pressure detection device for a film sensor. A detection assembly is arranged on the workbench and comprises a rack, an oil cylinder, a middle plate, an air bag bottom plate, an air bag film, a pressing frame and a film sensor, the sliding direction of the middle plate is perpendicular to the air bag bottom plate, an air groove is further formed in the air bag bottom plate, and the air bag film tightly covers the air groove and is fixed to the air bag bottom plate through the pressing frame. The air groove is provided with an air inlet and an air outlet, the air bag bottom plate is provided with an air inlet channel and an air outlet channel, an inlet of the air inlet channel is formed in the side edge of the air bag bottom plate, an outlet of the air inlet channel is communicated with the air inlet, an outlet of the air outlet channel is also formed in the side edge of the air bag bottom plate, and the air outlet in the air groove is communicated with the air outlet channel. The middle plate is driven by the oil cylinder to enable the thin film sensor to be tightly pressed on the air bag film, and the thin film sensor is detected by inflating the air groove. The device is ingenious in structure, convenient and practical.

Description

Technical Field

[0001] The utility model relates to the field of film sensor detection, in particular to an airbag pressure detection device for a film sensor. Background Art

[0002] Thin film sensors are called the third generation sensors. Since thin film pressure sensors are prepared by physical vapor deposition, they can be used in harsh environments such as high temperature, humidity, corrosion, and vibration. Thin film pressure sensors have been widely used in aviation, aerospace, petroleum industry, and automobiles due to their excellent stability and adaptability to harsh environments.

[0003] In the prior art, the film sensor is tested by an airbag pressure testing device. During the testing process, the film sensor is placed on the lower pressure plate, and then the upper and lower pressure plates are attached together by a lifting frame, and then the upper and lower pressure plates are locked with multiple screws. Then, the test is started by manual air intake. After the test is completed, the air is manually exhausted, and then all the screws are loosened and removed one by one to take out the sensor. However, this testing method is cumbersome to operate, which will cause operator fatigue and low efficiency, and is very inconvenient. Utility Model Content

[0004] The utility model aims to provide an airbag pressure detection device for a thin film sensor, which has an ingenious structure, drives a middle plate by an oil cylinder to press the thin film sensor, and detects the thin film sensor after the airbag membrane is inflated, which is efficient and convenient.

[0005] The technical solution for achieving the purpose of the utility model is as follows: the utility model has a workbench; the workbench is provided with a detection component that can perform pressure detection on a thin film sensor, the detection component includes a frame arranged on the workbench, a cylinder fixed on the frame, a middle plate fixed to the telescopic end of the cylinder, an airbag bottom plate arranged on the frame and located directly below the middle plate, an airbag membrane, a pressure frame that can fix the airbag membrane on the airbag bottom plate, and a thin film sensor placed on the airbag membrane, the sliding direction of the middle plate is arranged perpendicular to the airbag bottom plate, and the airbag bottom An air groove is also provided on the plate, the airbag membrane is tightly covered on the air groove and fixed to the airbag base plate by a pressing frame, the air groove is provided with an air inlet and an air outlet, the airbag base plate is provided with an air inlet channel and an air outlet channel, the inlet of the air inlet channel is arranged on the side of the airbag base plate, the outlet of the air inlet channel is connected with the air inlet, the outlet of the air outlet channel is also arranged on the side of the airbag base plate, the air outlet in the air groove is connected with the air outlet channel, the middle plate is driven by the oil cylinder to press the thin film sensor tightly against the airbag membrane, and detects the thin film sensor by inflating the air groove.

[0006] Furthermore, the airbag bottom plate is provided with a pressing groove for the pressing frame to be installed, the pressing groove is provided with a first mounting groove arranged along the contour of the pressing groove, the bottom surface of the pressing frame is provided with a second mounting groove arranged along the contour of the pressing frame, the first mounting groove in the pressing groove and the second mounting groove on the bottom surface of the pressing frame are staggered, sealing rings are installed in the first mounting groove and the second mounting groove, after the pressing frame is pressed into the pressing groove, the airbag membrane is tightly pressed against the air groove through the staggered pressure of the sealing rings in the first mounting groove and the second mounting groove, and the pressing frame is fixed in the pressing groove by a locking member after the airbag membrane is pressed.

[0007] Furthermore, a transition arc surface is provided between the inner wall and the bottom surface of the above-mentioned pressing groove, and a pressure arc surface corresponding to the transition arc surface is provided on the pressing frame. A sealing ring is also provided between the transition arc surface and the pressure arc surface. The pressure arc surface on the pressing frame presses the airbag membrane tightly against the transition arc surface by pressing the sealing ring between the transition arc surface and the pressure arc surface.

[0008] Furthermore, the inlet of the air inlet channel and the outlet of the air outlet channel are located on the same side of the airbag bottom plate, the inlet of the air inlet channel is connected to an air inlet connector, and the outlet of the air outlet channel is provided with an air outlet connector.

[0009] Furthermore, the above-mentioned frame includes a fixed base plate arranged on the workbench, an upper fixed plate arranged above the fixed base plate, and a plurality of connecting rods connecting the fixed base plate and the upper fixed plate, the airbag base plate is arranged on the fixed base plate, the oil cylinder is fixedly installed on the upper fixed plate, the middle plate is provided with through holes corresponding to each connecting rod and through which the corresponding connecting rod can pass, and the middle plate is raised and lowered on the workbench by the drive of the oil cylinder and the sliding cooperation between each connecting rod and the through hole.

[0010] Furthermore, handles for grasping are provided on both sides of the airbag bottom plate.

[0011] Furthermore, a switch control box is provided on the workbench. The switch control box is provided with two start buttons which are pressed synchronously to drive the oil cylinder to rise and fall. The switch control box is also provided with an emergency stop button.

[0012] Furthermore, a sealing frame is provided on the workbench, the frame and the detection assembly are both located in the sealing frame, a sliding door is provided on the sealing frame, and the sliding door on the sealing frame and the switch control box are located on the same side of the workbench.

[0013] The utility model has positive effects: (1) The utility model sets a detection component on the workbench, drives the middle plate to press down through the oil cylinder, and after pressing against the airbag bottom plate, inflates the air groove through the air intake channel, and then inflates the airbag membrane. After the inflation is completed, the pressure value detected by the film sensor is compared with the set pressure value to detect the qualification of the film sensor, which effectively solves the problem in the prior art that the upper pressure plate and the lower pressure plate need to be fixed and separated by the installation and disassembly of multiple screws, and can be used for film sensors of various sizes, with good adjustability and applicability, and also greatly improves the detection efficiency and detection quality, with a clever structure, stable and practical.

[0014] (2) The utility model provides a pressure groove on the bottom plate of the airbag, provides a pressure frame to press the airbag membrane, and provides a first installation groove and a second installation groove that are offset to press the airbag membrane. On the one hand, it can ensure the overall air tightness of the airbag membrane after installation, and on the other hand, it can also ensure the overall tightness of the airbag membrane after installation, avoiding the shrinkage of the airbag membrane, and is stable and practical.

[0015] (3) The utility model provides a pressing arc surface, which can, on the one hand, prevent the pressure frame from damaging the airbag membrane during the process of pressing the airbag membrane; on the other hand, the pressing arc surface applies pressure to the sealing strip and presses the airbag membrane against the transition arc surface, further ensuring the overall tightness and airtightness of the airbag membrane, which is safe and practical.

[0016] (4) The utility model provides an air inlet joint at the inlet of the air inlet passage and an air outlet joint at the outlet of the air outlet passage to quickly connect with an external air source, while also ensuring the sealing of the air inlet and air outlet.

[0017] (5) The utility model ensures the stability of the middle plate when it is lifted or lowered by setting a plurality of connecting rods, and can also ensure the parallelism between the middle plate and the airbag bottom plate. In addition, it also ensures the smoothness of the middle plate during the lifting process, avoids the displacement of the middle plate during the lifting process, and further ensures the comprehensiveness of the middle plate pressing against the airbag bottom plate.

[0018] (6) The utility model provides handles on both sides of the airbag bottom plate, making it convenient for operators to take and place the airbag bottom plate, which is efficient and practical.

[0019] (7) The utility model can avoid the pneumatic cylinder being activated by mistakenly pressing the start button by setting two start buttons. The cylinder can be started only after both start buttons are pressed, thereby ensuring the safety of the cylinder start-up. At the same time, the emergency stop button is set to further ensure that the overall operation or the cylinder is stopped in time when there is no operation and the cylinder descends, thereby ensuring the overall safety of the equipment and operators. It is safe and practical.

[0020] (8) The utility model ensures the cleanliness of the rack and its parts by setting a sealing frame, thereby preventing wear or corrosion caused by dust or impurities. At the same time, a sliding door is provided to facilitate operators to take and place the film sensor, which is convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to specific embodiments and in conjunction with the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the airbag pressure detection device for the thin film sensor in the utility model;

[0023] Figure 2 It is a schematic diagram of the overall structure of the detection component in the utility model;

[0024] Figure 3 This is a schematic diagram of the overall structure of the connection between the airbag bottom plate and the pressure frame in the utility model;

[0025] Figure 4 It is a top view of the overall structure of the airbag bottom plate and the pressure frame connected in the utility model;

[0026] Figure 5 for Figure 4 Sectional view at AA in the middle;

[0027] Figure 6 for Figure 5 The enlarged view of the M in the middle;

[0028] Figure 7 This is a schematic diagram of the overall structure of the airbag bottom plate in the utility model;

[0029] Figure 8 It is a top view of the overall structure of the airbag bottom plate in the utility model;

[0030] Fig. 9 for Figure 8 Sectional view at the middle BB;

[0031] Fig.10 for Figure 8 Sectional view at CC;

[0032] Fig.11 It is a schematic diagram of the overall structure of the medium-pressure frame of the utility model. DETAILED DESCRIPTION

[0033] See Figures 1 to 11The utility model has a workbench 1; the workbench 1 is provided with a detection component 4 that can detect the pressure of a film sensor 47, the detection component 4 includes a frame 41 arranged on the workbench 1, a cylinder 42 fixed on the frame 41, a middle plate 43 fixed to the telescopic end of the cylinder 42, an airbag bottom plate 44 arranged on the frame 41 and located directly below the middle plate 43, an airbag membrane 45, a pressure frame 46 that can fix the airbag membrane 45 on the airbag bottom plate 44, and a film sensor 47 placed on the airbag membrane 45, the sliding direction of the middle plate 43 is perpendicular to the airbag bottom plate 44, the airbag bottom plate 44 is also provided with an air groove 40, the The airbag membrane 45 tightly covers the air groove 40 and is fixed to the airbag bottom plate 44 through a pressing frame 46. The air groove 40 is provided with an air inlet 401 and an air outlet 402. The airbag bottom plate 44 is provided with an air inlet channel 6 and an air outlet channel 7. The inlet of the air inlet channel 6 is arranged on the side of the airbag bottom plate 44, and the outlet of the air inlet channel 6 is connected with the air inlet 401. The outlet of the air outlet channel 7 is also arranged on the side of the airbag bottom plate 44. The air outlet 402 in the air groove 40 is connected with the air outlet channel 7. The middle plate 43 is driven by the oil cylinder 42 to press the film sensor 47 tightly against the airbag membrane 45, and detects the film sensor 47 by inflating the air groove 40.

[0034] The airbag bottom plate 44 is provided with a pressing groove 440 for the pressing frame 46 to be installed, and the pressing groove 440 is provided with a first mounting groove 441 arranged along the contour of the pressing groove 440, and the bottom surface of the pressing frame 46 is provided with a second mounting groove 461 arranged along the contour of the pressing frame 46, the first mounting groove 441 in the pressing groove 440 and the second mounting groove 461 on the bottom surface of the pressing frame 46 are staggered, and sealing rings 5 ​​are installed in the first mounting groove 441 and the second mounting groove 461. After the pressing frame 46 is pressed into the pressing groove 440, the airbag membrane 45 is tightly pressed against the air groove 40 through the staggered pressure of the sealing rings 5 ​​in the first mounting groove 441 and the second mounting groove 461, and the pressing frame 46 is fixedly installed in the pressing groove 440 by a locking member after the airbag membrane 45 is pressed.

[0035] A transition arc surface 442 is provided between the inner wall and the bottom surface of the pressing groove 440, and a pressure arc surface 462 corresponding to the transition arc surface 442 is provided on the pressing frame 46. A sealing ring 5 is also provided between the transition arc surface 442 and the pressure arc surface 462. The pressure arc surface 462 on the pressing frame 46 presses the airbag membrane 45 tightly against the transition arc surface 442 by pressing the sealing ring 5 between the transition arc surface 442 and the pressure arc surface 462.

[0036] The inlet of the air inlet channel 6 and the outlet of the air outlet channel 7 are located on the same side of the airbag bottom plate 44 . The inlet of the air inlet channel 6 is connected to an air inlet connector 47 , and the outlet of the air outlet channel 7 is provided with an air outlet connector 48 .

[0037] The frame 41 includes a fixed base plate 412 arranged on the workbench 1, an upper fixed plate 411 arranged above the fixed base plate 412, and a plurality of connecting rods 413 connecting the fixed base plate 412 and the upper fixed plate 411. The airbag base plate 44 is arranged on the fixed base plate 412, and the oil cylinder 42 is fixedly installed on the upper fixed plate 411. The middle plate 43 is provided with through holes corresponding to each connecting rod 413 and through which the corresponding connecting rod 413 can pass. The middle plate 43 is raised and lowered on the workbench 1 by the drive of the oil cylinder 42 and the sliding cooperation between each connecting rod 413 and the through hole.

[0038] Handles 49 for grasping are provided on both sides of the airbag bottom plate 44 .

[0039] The workbench 1 is also provided with a switch control box 3 , on which are provided two start buttons 31 for driving the oil cylinder 42 to move up and down after being pressed synchronously, and an emergency stop button 32 .

[0040] A sealing frame 2 is provided on the workbench 1 , the frame 41 and the detection assembly 4 are both located in the sealing frame 2 , a sliding door 21 is provided on the sealing frame 2 , and the sliding door 21 on the sealing frame 2 and the switch control box 3 are located on the same side of the workbench 1 .

[0041] Working principle of the utility model: During the use of the utility model, the middle plate 43 is first fixed to the telescopic end of the oil cylinder 42, and the airbag membrane 45 is pressed into the pressure groove 440 through the cooperation of the pressure frame 46 and the pressure groove 440, and in the process of pressing down, the sealing ring 5 in the first installation groove 441 and the second installation groove 461 arranged in a displaced manner ensures the tightness and sealing of the airbag membrane 45 after installation, and the sealing ring 5 is pressed against the airbag membrane 45 and pressed against the transition arc surface 442 by the pressing arc surface 462, which further ensures that the airbag membrane 45 is pressed against the air groove 40, and the airtightness between the airbag membrane 45 and the air groove 40 is ensured. At the same time, it also prevents the sharp corners on the upper pressing frame 46 from damaging the airbag membrane 45, and also ensures that the airbag membrane 45 is in a taut state on the air groove 40. Then the pressing frame 46 is fixed in the pressing groove 440 by a locking piece, and the airbag bottom plate 44 is fixedly installed on the fixed bottom plate 412, the air inlet connector 47 is installed at the inlet of the air inlet channel 6, and the air outlet connector 48 is installed at the outlet of the air outlet channel 7. The air inlet connector 47 and the air outlet connector 48 are respectively connected to the external air source, and the controller in the switch control box 3 is electrically connected to the film sensor 47, the oil cylinder 42 and the external air source. At the same time, the controller is also electrically connected to the external display device, and the external display device The pressure value of the filled gas and the pressure value of the film sensor 47 can be displayed. The operator first places the film sensor 47 on the airbag membrane 45, and then presses the start button 31 with both hands at the same time. The oil cylinder 42 starts to drive the middle plate 43 to press down on the airbag membrane 45 until it fits with the upper end surface of the airbag bottom plate 44 and maintains its pressure. A pressure value is set in the controller, and the external air source is controlled to start ventilation into the air groove 40. At this time, the air outlet joint 48 is in a closed state. When the input air pressure of the external air source reaches the pressure value, this pressure value is maintained, and the film sensor 47 is tested for the pressure it is subjected to. When the difference between the detection value of the film sensor 47 and the set value is within the allowable range, the detection is qualified. After the detection is completed, the air outlet joint 48 is opened to start exhausting. When the air pressure reaches zero, the controller controls the oil cylinder 42 to lift and reciprocate to detect the film sensor 47 in turn, which effectively solves the need to repeatedly disassemble and install the upper pressure plate and the lower pressure plate in the prior art, greatly simplifies the overall operating steps, improves the overall detection efficiency and detection quality, and can be applied to film sensors 47 of various sizes, with good adjustability and applicability, ingenious structure, stable and practical.

[0042] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An airbag pressure detection device for a thin film sensor, having a workbench; characterized in that: The workbench is provided with a detection component that can perform pressure detection on the film sensor. The detection component includes a frame arranged on the workbench, a cylinder fixed on the frame, a middle plate fixed on the telescopic end of the cylinder, an airbag bottom plate arranged on the frame and directly below the middle plate, an airbag membrane, a pressure frame that can fix the airbag membrane on the airbag bottom plate, and a film sensor placed on the airbag membrane. The sliding direction of the middle plate is arranged perpendicular to the airbag bottom plate. The airbag bottom plate is also provided with an air groove. The airbag membrane tightly covers the air groove and is fixed to the airbag bottom plate through the pressure frame. The air groove is provided with an air inlet and an air outlet. The airbag bottom plate is provided with an air inlet channel and an air outlet channel. The inlet of the air inlet channel is arranged on the side of the airbag bottom plate, the outlet of the air inlet channel is connected to the air inlet, the outlet of the air outlet channel is also arranged on the side of the airbag bottom plate, and the air outlet in the air groove is connected to the air outlet channel. The middle plate is driven by the cylinder to press the film sensor tightly against the airbag membrane, and the film sensor is detected by inflating the air groove.

2. The airbag pressure detection device for a thin film sensor according to claim 1, characterized in that: The airbag bottom plate is provided with a pressing groove for the pressing frame to be installed, the pressing groove is provided with a first mounting groove arranged along the contour of the pressing groove, the bottom surface of the pressing frame is provided with a second mounting groove arranged along the contour of the pressing frame, the first mounting groove in the pressing groove and the second mounting groove on the bottom surface of the pressing frame are staggered, and sealing rings are installed in the first mounting groove and the second mounting groove. After the pressing frame is pressed into the pressing groove, the airbag membrane is tightly pressed against the air groove through the staggered pressure of the sealing rings in the first mounting groove and the second mounting groove. After the airbag membrane is pressed, the pressing frame is fixed in the pressing groove by a locking member.

3. The airbag pressure detection device for a thin film sensor according to claim 2, characterized in that: A transition arc surface is provided between the inner wall and the bottom surface of the pressing groove, and a pressure arc surface corresponding to the transition arc surface is provided on the pressing frame. A sealing ring is also provided between the transition arc surface and the pressure arc surface. The pressure arc surface on the pressing frame presses the airbag membrane tightly against the transition arc surface by pressing the sealing ring between the transition arc surface and the pressure arc surface.

4. The airbag pressure detection device for a thin film sensor according to claim 3, characterized in that: The inlet of the air inlet channel and the outlet of the air outlet channel are located on the same side of the airbag bottom plate, the inlet of the air inlet channel is connected with an air inlet connector, and the outlet of the air outlet channel is provided with an air outlet connector.

5. The airbag pressure detection device for a thin film sensor according to claim 4, characterized in that: The frame includes a fixed base plate arranged on the workbench, an upper fixed plate arranged above the fixed base plate, and a plurality of connecting rods connecting the fixed base plate and the upper fixed plate. The airbag base plate is arranged on the fixed base plate, the oil cylinder is fixedly installed on the upper fixed plate, the middle plate is provided with through holes corresponding to each connecting rod and through which the corresponding connecting rod can pass, and the middle plate is driven by the oil cylinder and lifted and lowered by the sliding cooperation between each connecting rod and the through hole.

6. The airbag pressure detection device for a thin film sensor according to claim 5, characterized in that: Both sides of the airbag bottom plate are provided with handles for grasping.

7. The airbag pressure detection device for a thin film sensor according to claim 6, characterized in that: The workbench is also provided with a switch control box, on which are provided two start buttons which are pressed synchronously to drive the oil cylinder to rise and fall, and an emergency stop button.

8. The airbag pressure detection device for a thin film sensor according to claim 7, characterized in that: A sealing frame is arranged on the workbench, the frame and the detection assembly are both located in the sealing frame, a sliding door is arranged on the sealing frame, and the sliding door on the sealing frame and the switch control box are located on the same side of the workbench.

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