A barometric pressure sensor sensitivity test device

Abstract

The application discloses a kind of air pressure sensor sensitivity test device, including air pressure generating mechanism and transmission bearing mechanism, air pressure generating mechanism includes gas transmission pipeline, one end of gas transmission pipeline is connected with gas pressurization unit, the other end of gas transmission pipeline is open structure, 2 or more than 2 air pressure different wind pressure zones are set in gas transmission pipeline, transmission bearing mechanism includes drive unit, transmission bearing unit and rotating unit, drive unit is connected with rotating unit, transmission bearing unit is movably connected with rotating unit, transmission bearing unit is set in gas transmission pipeline, drive unit drives rotating unit to rotate, to drive transmission bearing unit to move and make the air pressure sensor to be detected pass through different wind pressure zones, the sensitivity of the air pressure sensor to be detected is realized.

Description

Technical Field

[0001] This invention relates to the field of barometric pressure sensor testing technology, and in particular to a barometric pressure sensor sensitivity testing device. Background Technology

[0002] A barometric pressure sensor is a detection device that senses the measured information and transforms it into an electrical signal or other required form of information output according to a certain rule, to meet the requirements of information transmission, processing, storage, display, recording, and control. Barometric pressure sensors are instruments used to measure the absolute pressure of gases and are a primary component in achieving automated detection and control. Many barometric pressure sensors use a variable-capacitance silicon diaphragm capsule as their main component. When the external atmospheric pressure changes, the ejector pin of the variable-capacitance silicon diaphragm capsule actuates, causing the single-crystal silicon diaphragm capsule to elastically deform. This deformation, in turn, changes the capacitance of the parallel-plate capacitor within the silicon diaphragm capsule, thereby controlling the barometric pressure sensor.

[0003] Barometric pressure sensors can be used to detect wind pressure when objects are in motion, such as cars and drones. The problem with existing technology is that it is difficult to detect the sensitivity of the barometric pressure sensor when it is in use. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a pressure sensor sensitivity testing device, which sets two or more wind pressure zones with different air pressures in a gas transmission pipeline. A drive unit drives a rotating unit to rotate, thereby moving a transmission and carrying unit to move the pressure sensor to be tested through different wind pressure zones, thereby realizing the detection of the sensitivity of the pressure sensor to be tested.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0006] A pressure sensor sensitivity testing device includes a pressure generating mechanism and a transmission carrying mechanism. The pressure generating mechanism includes a gas transmission pipe, one end of which is connected to a gas pressurization unit, and the other end of the gas transmission pipe is an open structure. Two or more pressure zones with different pressures are set inside the gas transmission pipe. The transmission carrying mechanism includes a driving unit, a transmission carrying unit, and a rotating unit. The driving unit is connected to the rotating unit, and the transmission carrying unit is movably connected to the rotating unit. The transmission carrying unit is set inside the gas transmission pipe. The driving unit drives the rotating unit to rotate, thereby moving the transmission carrying unit to move the pressure sensor to be tested through different pressure zones, thus realizing the detection of the sensitivity of the pressure sensor to be tested.

[0007] Furthermore, the transmission and carrying mechanism includes a drive unit, a transmission and carrying unit, and a rotating unit. The drive unit is connected to the rotating unit, and the transmission and carrying unit is movably connected to the rotating unit. The transmission and carrying unit is installed inside the gas transmission pipeline and is used to transmit the pressure sensor to be tested through different pressure zones.

[0008] Furthermore, the rotating unit includes two or more rotating sub-units. The driving unit is connected to the first rotating sub-unit. The first rotating sub-unit is located outside the opening structure at the other end of the gas transmission pipeline. The second rotating sub-unit is located inside one end of the gas transmission pipeline. The transmission bearing unit is movably connected to the first rotating sub-unit and the second rotating sub-unit respectively. The driving unit drives the first rotating sub-unit to rotate, thereby driving the transmission bearing unit to move, and then driving the second rotating sub-unit to rotate.

[0009] Furthermore, to improve the sensitivity, detection accuracy, and efficiency of the pressure sensor under test, the transmission speed and / or transmission distance of the transmission carrier unit are controlled by the drive unit.

[0010] Furthermore, the rotating subunit is used to drive the rotating subunit fixedly connected to the drive unit, thereby driving the transmission carrier unit to move and pass the pressure sensor to be detected through different wind pressure zones, and then drive other rotating subunits to rotate through the transmission carrier unit.

[0011] Furthermore, the transmission and carrying unit includes a fixed connector, a transmission component, and a carrying fixing component. One end of the fixed connector is fixedly connected to the transmission component, and the other end of the fixed connector is connected to the carrying fixing component. The transmission component is movably connected to the rotating unit, and the connection between the other end of the fixed connector and the carrying fixing component is a detachable connection.

[0012] Furthermore, detachable connection methods include magnetic detachable connection methods and / or bayonet detachable connection methods.

[0013] Furthermore, the transmission component is movably connected to two or more rotating sub-units respectively. The drive unit drives the first rotating sub-unit, thereby driving the transmission component to move and pass the pressure sensor to be detected through different wind pressure zones. The transmission component drives the second rotating sub-unit to rotate.

[0014] The support fixture is used to fix the pressure sensor to be tested and the detection display module, connecting the pressure sensor to be tested and the detection display module, which displays the pressure value collected by the pressure sensor.

[0015] Furthermore, the connection method between the other end of the fixed connector and the bearing fastener is a magnetically detachable connection method, and the bearing fastener or / and the fixed connector are provided with magnetic material components, so that the connection method between the other end of the fixed connector and the bearing fastener is a magnetically detachable connection method.

[0016] Furthermore, two or more pressure zones with different air pressures are set in the gas transmission pipeline; the drive unit drives the rotating unit to rotate, thereby driving the transmission carrying unit to transmit the pressure sensor to be tested, that is, the pressure sensor to be tested is transmitted through two or more pressure zones with different air pressures by the transmission carrying unit.

[0017] Furthermore, in order to adjust and control the gas pressure in the gas transmission pipeline, a valve opening and closing structure is installed at the gas transmission pipeline. The valve opening and closing structure includes an electric actuator and a pipeline valve. The electric actuator is connected to the pipeline valve. By controlling the extension and retraction of the electric actuator, the pipeline valve is moved to control the opening and closing of the gas transmission pipeline, thereby adjusting and controlling the gas pressure in the gas transmission pipeline.

[0018] Furthermore, the pressure generation unit is installed on the gas transmission pipeline, and the pressure generation unit is fixedly connected to the gas transmission pipeline.

[0019] Furthermore, the wind pressure zone generation unit includes several wind pressure zone generation sub-units. Each wind pressure zone generation sub-unit includes a cavity. One end of the cavity is fixedly connected to a gas transmission pipeline, and the other end of the cavity is equipped with an electric push rod. The extended end of the electric push rod is fixedly connected to a bearing rod, and the other end of the bearing rod is fixedly connected to a robotic arm that grasps the pressure sensor to be measured.

[0020] Furthermore, a baffle structure is provided at the other end of the cavity. The edge of the baffle structure fits against the inner wall of the cavity. The baffle structure is provided with vent holes. The baffle structure consists of one or more baffles connected together. The diameter of the vent holes decreases from bottom to top.

[0021] Furthermore, the transmission and carrying unit transmits the pressure sensor to be tested to different wind pressure zones, controls the electric push rod to extend, and the robotic arm grabs the pressure sensor to be tested. Then, it controls the electric push rod to retract, lifting the pressure sensor from the gas transmission pipe into the cavity. After testing is completed, it controls the electric push rod to extend again, and the robotic arm grabs the pressure sensor to be tested, lifting it from the cavity into the gas transmission pipe, thus transferring the pressure sensor from the cavity to the transmission and carrying unit.

[0022] Furthermore, to improve the stability between the pressure zone generation unit and the gas transmission pipeline, a pressure zone generation unit fixing component is installed on the gas transmission pipeline to fix the pressure zone generation unit. That is, the pressure zone generation unit fixing component is fixedly connected to both the pressure zone generation unit and the gas transmission pipeline.

[0023] Furthermore, the pressure zone generation unit includes several pressure zone generation sub-units. The pressure zone generation unit fixing component is fixedly connected to several pressure zone generation sub-units respectively, that is, the pressure zone generation unit fixing component is fixedly connected to several electric push rods respectively, and the several electric push rods are fixed on the gas transmission pipeline through the pressure zone generation unit fixing component.

[0024] Furthermore, several baffle rings, which are air-filled baffle rings, are installed inside the gas transmission pipeline. From the connection point between the gas pressurization unit and the gas transmission pipeline to the opening at the other end of the gas transmission pipeline, the inner size of the baffle ring decreases sequentially. As gas passes through the inside of the baffle ring, the internal pressure increases. That is, when air is injected into the baffle ring, the inner size of the baffle ring decreases, and the inner ring of the baffle ring adheres to the surface of the transmission component, thus tensioning the transmission belt. The inner ring of the air-filled baffle ring adheres to the surface of the synchronous belt; when the inner size of the baffle ring decreases, it can tension the synchronous belt.

[0025] Furthermore, the gas transmission pipeline is configured with one inlet and one or more outlets, and includes one or more gas transmission branch pipelines. The inlet of the gas transmission pipeline is connected to the gas pressurization unit, the outlet of the gas transmission pipeline has an open structure, and the air pressure zone of the gas transmission pipeline has through holes, that is, the air pressure zone generation unit at the through holes is fixedly connected to the gas transmission pipeline.

[0026] Optionally, the gas transmission pipeline is configured with one inlet and two outlets. One end of the two gas transmission pipelines is interconnected, while the other end is open. The interconnected end of the gas transmission pipelines is connected to a gas pressurization unit. One rotating subunit is installed within the interconnected structure of the gas transmission pipelines. A drive unit is connected to the first rotating subunit, which is located outside the open structure at the other end of the gas transmission pipeline. A second rotating subunit is installed within the interconnected structure of the two gas transmission pipelines. A transmission carrier unit is movably connected to both the first and second rotating subunits. The drive unit drives the first rotating subunit to rotate, thereby moving the transmission carrier unit to move the pressure sensor under test through different pressure zones. The transmission carrier unit then drives the second rotating subunit to rotate. It should be noted that the number of rotating subunits is not specifically set in this application; the number can be increased according to actual usage. The drive unit controls the transmission speed and / or transmission distance of the transmission carrier unit.

[0027] Furthermore, in order to adjust and control the gas pressure in the gas transmission pipeline, a valve opening and closing structure is installed at the gas transmission pipeline. The valve opening and closing structure includes an electric actuator and a pipeline valve. The electric actuator is connected to the pipeline valve. By controlling the extension and retraction of the electric actuator, the pipeline valve is moved to control the opening and closing of the gas transmission pipeline, thereby adjusting and controlling the gas pressure in the gas transmission pipeline.

[0028] Optionally, in order to adjust and control the gas pressure in the gas transmission pipeline, valve opening and closing structures can be installed at one or more gas transmission branch pipelines. The valve opening and closing structures can be set for the gas transmission branch pipelines according to the actual usage.

[0029] A pressure sensor sensitivity testing device further includes a pressure regulating box and a support plate. The pressure generating mechanism and the transmission bearing mechanism are fixed on the support plate. The support plate is movably connected to the pressure regulating box, that is, the pressure regulating box is provided with a groove that matches the support plate so that the support plate is movably connected to the pressure regulating box. The pressure generating mechanism and the transmission bearing mechanism are installed inside the pressure regulating box.

[0030] The beneficial effects of this invention are as follows: Two or more air pressure zones with different air pressures are set in the gas transmission pipeline. The drive unit drives the rotating unit to rotate, thereby driving the transmission bearing unit to move and pass the air pressure sensor to be tested through different air pressure zones, so as to realize the sensitivity of the air pressure sensor to be tested.

[0031] By controlling the transmission speed and / or transmission distance of the transmission carrier unit through the drive unit, the sensitivity, detection accuracy, and efficiency of the pressure sensor under test are improved.

[0032] The transmission and carrying unit is equipped with a fixed connector, a transmission component, and a carrying fixture. One end of the fixed connector is fixedly connected to the transmission component, and the other end of the fixed connector is connected to the carrying fixture. The transmission component is movably connected to the rotating unit. The connection between the other end of the fixed connector and the carrying fixture is a detachable connection, which improves the sensitivity and efficiency of the pressure sensor under test.

[0033] By installing a pressure zone generation unit fixing component on the gas transmission pipeline to fix the pressure zone generation unit, the fixing component is fixedly connected to both the pressure zone generation unit and the gas transmission pipeline, thereby improving the stability between the pressure zone generation unit and the gas transmission pipeline.

[0034] Several air-filled retaining rings are installed inside the gas transmission pipe. From the connection between the gas pressurization unit and the gas transmission pipe to the opening at the other end of the pipe, the inner size of the retaining ring decreases sequentially. As gas passes through the inside of the retaining ring, the internal pressure increases. Specifically, when air is injected into the retaining ring, the inner size decreases, and the inner ring fits against the surface of the transmission component, thus tensioning the transmission belt.

[0035] By installing a valve opening / closing structure at the gas transmission pipeline, which includes an electric actuator and a pipeline valve, the electric actuator is connected to the pipeline valve. By controlling the extension and retraction of the electric actuator, the pipeline valve is moved to control the opening and closing of the gas transmission pipeline, thereby regulating the gas pressure in the gas transmission pipeline. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a three-dimensional structural schematic diagram of a pressure sensor sensitivity testing device according to the present invention;

[0038] Figure 2 This is a top view schematic diagram of the pressure sensor sensitivity testing device of the present invention;

[0039] Figure 3 This is the present invention. Figure 2 A schematic diagram of the cross-sectional structure of section AA in the middle;

[0040] Figure 4 This is the present invention. Figure 2 A magnified structural diagram of part B in the middle section;

[0041] Figure 5 This is the present invention. Figure 3 A magnified structural diagram of section C;

[0042] Figure 6 This is a schematic diagram of the main structure of a pressure sensor sensitivity testing device according to the present invention;

[0043] Figure 7 This is the present invention. Figure 6 A schematic diagram of the cross-sectional structure of the DD section;

[0044] Figure 8This is a three-dimensional structural diagram of a pressure sensor sensitivity testing device of the present invention, which includes a pressure regulating box.

[0045] Attached image labels:

[0046] 1. Gas transmission pipeline; 2. Gas pressurization unit; 3. Opening structure; 4. Air pressure zone; 5. Transmission bearing mechanism; 6. Transmission bearing unit; 7. Gas transmission branch pipeline; 8. Through hole of valve opening and closing structure; 9. Electric push rod of valve opening and closing structure; 10. Pipeline valve; 11. Cavity; 12. Fixing component of first air pressure zone generation unit; 13. Fixing component of second air pressure zone generation unit; 14. Electric push rod of air pressure zone generation unit; 15. Bearing rod; 16. Baffle structure; 17. Vent hole; 61. Fixed connecting component; 62. Bearing fixing component; 18. Robotic arm; 19. Retaining ring; 51. First rotating subunit; 52. Second rotating subunit; 53. Transmission component; 54. Drive unit; 20. Support plate; 21. Air pressure regulating box. Detailed Implementation

[0047] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0048] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0049] Example 1:

[0050] A pressure sensor sensitivity testing device includes a pressure generating mechanism and a transmission carrying mechanism. The pressure generating mechanism includes a gas transmission pipe, one end of which is connected to a gas pressurization unit, and the other end of the gas transmission pipe is open. Two or more pressure zones with different pressures are set within the gas transmission pipe. The transmission carrying mechanism includes a driving unit, a transmission carrying unit, and a rotating unit. The driving unit is connected to the rotating unit, and the transmission carrying unit is movably connected to the rotating unit. The transmission carrying unit is located within the gas transmission pipe. The driving unit drives the rotating unit to rotate, thereby moving the transmission carrying unit to transport the pressure sensor under test through different pressure zones, thus detecting the sensitivity of the pressure sensor. It should be noted that the transmission carrying unit transports the pressure sensor under test through the gas transmission pipe. When the pressure sensor is in different pressure zones, it displays different readings, thus detecting the sensitivity of the pressure sensor. Furthermore, because two or more different pressure environments are constructed, the sensitivity of the pressure sensor under test can be tested.

[0051] It should be noted that the gas booster unit can be an air compressor, or the gas pressure of the gas booster unit can be adjusted and controlled by a controller. In this application, no specific settings are made for the gas booster unit, and all devices that perform gas boosting fall within the protection scope of this invention.

[0052] The transmission and carrying mechanism includes a drive unit, a transmission and carrying unit, and a rotating unit. The drive unit is connected to the rotating unit, and the transmission and carrying unit is movably connected to the rotating unit. The transmission and carrying unit is disposed inside a gas transmission pipeline and is used to transmit the pressure sensor under test through different pressure zones. The rotating unit includes two or more rotating sub-units. For example, when there are two rotating sub-units, the drive unit is connected to the first rotating sub-unit, which is disposed outside the opening structure at the other end of the gas transmission pipeline. The second rotating sub-unit is disposed inside one end of the gas transmission pipeline. The transmission and carrying unit is movably connected to both the first and second rotating sub-units. The drive unit drives the first rotating sub-unit to rotate, thereby moving the transmission and carrying unit, which in turn drives the second rotating sub-unit to rotate. In this application, the number of rotating sub-units is not specifically set, and the number of rotating sub-units can be increased according to actual use. Furthermore, to improve the sensitivity, detection accuracy, and efficiency of the pressure sensor under test, the transmission speed and / or transmission distance of the transmission and carrying unit are controlled by the drive unit.

[0053] It should be noted that the power source of the drive unit, which controls the transmission speed and / or transmission distance of the transmission carrier unit, can be a conventional motor, a stepper motor, or a servo motor, etc. No specific designation is made in this application, but any control of the transmission speed and / or transmission distance of the transmission carrier unit achieved through the drive unit falls within the scope of protection of this invention. For example, when the power source of the drive unit is a conventional motor, or when combined with a speed controller (e.g., a frequency converter, gearbox), the transmission speed and / or transmission distance of the transmission carrier unit can be controlled through the drive unit. When the power source of the drive unit is a stepper motor or a servo motor, a speed controller (e.g., a stepper motor driver or a servo motor driver) can be combined to achieve the same effect.

[0054] It should be noted that the rotating unit includes two or more rotating sub-units. These sub-units can have identical or different structures. The rotating sub-units can be rolling wheels, bearing wheels, etc. The drive unit is connected to the rolling wheel unit, and the bearing wheel unit is movably connected to the transmission and carrying unit. The drive unit drives the rolling wheel unit to rotate, thereby moving the transmission and carrying unit to move the pressure sensor under test through different pressure zones. The transmission and carrying unit then drives the rolling wheel or bearing wheel to rotate. In this application, the structure of the rotating sub-unit is not specifically defined. The rotating sub-unit is used by the drive unit to drive the rotating sub-units fixedly connected to the drive unit, thereby moving the transmission and carrying unit to move the pressure sensor under test through different pressure zones, and then the transmission and carrying unit drives the other rotating sub-units to rotate.

[0055] The transmission and carrying unit includes a fixed connector, a transmission component, and a carrying fixture. One end of the fixed connector is fixedly connected to the transmission component, and the other end is connected to the carrying fixture. The transmission component is movably connected to a rotating unit. The connection between the other end of the fixed connector and the carrying fixture is a detachable connection, which may include a magnetic detachable connection or / and a bayonet detachable connection. The transmission component is movably connected to the rotating unit, meaning it is movably connected to two or more rotating sub-units respectively. The drive unit drives the first rotating sub-unit, thereby moving the transmission component to pass the pressure sensor under test through different pressure zones. The transmission component then drives the second rotating sub-unit to rotate. The carrying fixture is used to fix the pressure sensor under test and the detection display module, connecting the pressure sensor to the detection display module, which displays the pressure magnitude collected by the pressure sensor. For example, the connection between the other end of the fixed connector and the carrying fixture is a magnetic detachable connection. The carrying fixture or / and the fixed connector may have magnetic material components, making the connection between the other end of the fixed connector and the carrying fixture a magnetic detachable connection. The detection and display module is used to connect with the pressure sensor under test and display the pressure signal value in real time.

[0056] It should be noted that the transmission component can be a synchronous belt, which is not specifically defined in this application. For example, one end of the fixed connector is fixedly connected to the synchronous belt, the other end of the fixed connector is connected to the bearing fixing component, the synchronous belt is movably connected to the rotating unit, the driving unit drives the rotating unit to rotate, thereby driving the synchronous belt to move and pass the pressure sensor to be detected through different wind pressure zones, and the synchronous belt drives the rotating unit to rotate.

[0057] Two or more pressure zones with different air pressures are set up inside the gas transmission pipeline. The drive unit drives the rotating unit to rotate, thereby driving the transmission carrying unit to transmit the pressure sensor to be tested through two or more pressure zones with different air pressures. Furthermore, in order to adjust and control the gas pressure in the gas transmission pipeline, a valve opening and closing structure is installed at the gas transmission pipeline. The valve opening and closing structure includes an electric actuator and a pipeline valve. The electric actuator is connected to the pipeline valve. By controlling the extension and retraction of the electric actuator, the pipeline valve is moved to control the opening and closing degree of the gas transmission pipeline, thereby achieving the adjustment and control of the gas pressure in the gas transmission pipeline.

[0058] The pressure zone generation unit is installed on the gas transmission pipeline and is fixedly connected to it. The pressure zone generation unit includes several sub-units, each containing a cavity. One end of the cavity is fixedly connected to the gas transmission pipeline, and the other end is equipped with an electric push rod. The extended end of the electric push rod is fixedly connected to a support rod, and the other end of the support rod is fixedly connected to a robotic arm for grasping the pressure sensor to be measured. The other end of the cavity also has a baffle structure, the edge of which fits against the inner wall of the cavity. The baffle structure has vent holes and consists of one or more connected baffles, with the vent diameter decreasing from bottom to top. Gas in the cavity is discharged out through the vent holes. The greater the depth to which the support rod is inserted into the cavity, the smaller the exhaust volume, thus changing the pressure in the cavity and consequently the pressure in the pipeline. The transmission and carrying unit transmits the pressure sensor to be tested to different wind pressure zones, controls the electric push rod to extend, and the robotic arm grabs the pressure sensor to be tested. Then, the electric push rod is controlled to retract, and the pressure sensor to be tested is picked up from the gas transmission pipe and placed into the cavity. After testing is completed, the electric push rod is controlled to extend again, and the robotic arm grabs the pressure sensor to be tested and places it from the cavity into the gas transmission pipe, thus transferring the pressure sensor to be tested from the cavity to the transmission and carrying unit. To further improve the stability between the pressure zone generation unit and the gas transmission pipeline, a pressure zone generation unit fixing component is installed on the gas transmission pipeline to secure the pressure zone generation unit. This component is fixedly connected to both the pressure zone generation unit and the gas transmission pipeline. For example, the pressure zone generation unit comprises several pressure zone generation sub-units. The fixing component is fixedly connected to each of these sub-units, specifically to several electric actuators. The electric actuators are then fixed to the gas transmission pipeline via the fixing component. The pressure zone generation unit fixing component can consist of several sub-fixing components, such as a first, second, third, etc. These sub-fixing components can be integrally formed. Therefore, the specific structure of the pressure zone generation unit fixing component is not specifically defined in this application.

[0059] Several baffle rings, which are air-filled baffle rings, are installed inside the gas transmission pipeline. From the connection between the gas pressurization unit and the gas transmission pipeline to the opening at the other end of the pipeline, the inner size of the baffle ring decreases sequentially. It should be noted that as gas passes through the inside of the baffle ring, the internal pressure increases. That is, when air is injected into the baffle ring, the inner size decreases, and the inner ring adheres to the surface of the transmission component, thus tensioning the transmission belt. For example, the inner ring of the air-filled baffle ring adheres to the surface of the timing belt; when the inner size of the baffle ring decreases, it can tension the timing belt.

[0060] The gas transmission pipeline is configured with one inlet and one or more outlets, meaning it includes one or more branch gas transmission pipelines. The inlet of the gas transmission pipeline is connected to a gas pressurization unit, and the outlet is an open structure. The pressure zone of the gas transmission pipeline has through holes, where the pressure generation unit is fixedly connected to the gas transmission pipeline. For example, the gas transmission pipeline can be configured with one inlet and two outlets. One end of the two gas transmission pipelines is interconnected, and the other end is open. The interconnected ends of the gas transmission pipelines are connected to the gas pressurization unit, and one rotating subunit is installed within the interconnected structure of the gas transmission pipelines. For example, the drive unit is connected to the first rotating subunit, which is located outside the open structure at the other end of the gas transmission pipeline. The second rotating subunit is installed within the interconnected structure of the two gas transmission pipelines, and the transmission carrying unit is movably connected to both the first and second rotating subunits. The drive unit drives the first rotating subunit to rotate, thereby moving the transmission carrier unit to move the pressure sensor under test through different pressure zones. The transmission carrier unit then drives the second rotating subunit to rotate. It should be noted that the number of rotating subunits is not specifically set in this application; the number can be increased according to actual usage. The drive unit controls the transmission speed and / or transmission distance of the transmission carrier unit. Optionally, to adjust the gas pressure in the gas transmission pipeline, valve opening / closing structures can be installed at one or more gas transmission branch pipelines. The valve opening / closing structures can be configured for the gas transmission branch pipelines according to actual usage.

[0061] To further improve the sensitivity of the pressure sensor under test, a pressure sensor sensitivity testing device is provided, which further includes a pressure regulating box and a support plate. The pressure generating mechanism and the transmission bearing mechanism are fixed on the support plate. The support plate is movably connected to the pressure regulating box, that is, the pressure regulating box is provided with a groove that matches the support plate so that the support plate is movably connected to the pressure regulating box. The pressure generating mechanism and the transmission bearing mechanism are installed inside the pressure regulating box.

[0062] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0063] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. Where the terms "first," "second," and "third" are used for descriptive purposes and to distinguish technical features, they should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0064] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0065] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A pressure sensor sensitivity testing device, characterized in that, The device includes a pressure generating mechanism and a transmission carrying mechanism. The pressure generating mechanism includes a gas transmission pipe, one end of which is connected to a gas pressurization unit, and the other end of which is an open structure. Two or more wind pressure zones with different air pressures are set inside the gas transmission pipe. The transmission carrying mechanism includes a driving unit, a transmission carrying unit, and a rotating unit. The driving unit is connected to the rotating unit, and the transmission carrying unit is movably connected to the rotating unit. The transmission carrying unit is set inside the gas transmission pipe. The driving unit drives the rotating unit to rotate, thereby moving the transmission carrying unit to pass the pressure sensor to be tested through different wind pressure zones, thereby realizing the detection of the sensitivity of the pressure sensor to be tested. The pressure zone generation unit is installed on the gas transmission pipeline and is fixedly connected to the gas transmission pipeline. The pressure zone generation unit includes several pressure zone generation sub-units. Each pressure zone generation sub-unit includes a cavity. One end of the cavity is fixedly connected to the gas transmission pipeline, and the other end of the cavity is provided with an electric push rod. The extended end of the electric push rod is fixedly connected to a bearing rod, and the other end of the bearing rod is fixedly connected to a robotic arm for grasping the pressure sensor to be measured. The gas transmission pipeline includes one or more gas transmission branch pipelines. The inlet end of the gas transmission pipeline is connected to the gas pressurization unit, the outlet end of the gas transmission pipeline is an open structure, and the air pressure zone of the gas transmission pipeline is provided with through holes. The air pressure zone generation unit at the through holes is fixedly connected to the gas transmission pipeline.

2. The pressure sensor sensitivity testing device according to claim 1, characterized in that, The rotating unit includes two or more rotating sub-units. The driving unit is connected to the first rotating sub-unit. The first rotating sub-unit is located outside the opening structure at the other end of the gas transmission pipeline. The second rotating unit is located inside one end of the gas transmission pipeline. The transmission bearing unit is movably connected to the first rotating sub-unit and the second rotating sub-unit respectively.

3. The pressure sensor sensitivity testing device according to claim 1, characterized in that, The transmission bearing unit includes a fixed connector, a transmission component, and a bearing fixing component. One end of the fixed connector is fixedly connected to the transmission component, and the other end of the fixed connector is connected to the bearing fixing component. The transmission component is movably connected to the rotating unit, and the connection between the other end of the fixed connector and the bearing fixing component is a detachable connection.

4. The pressure sensor sensitivity testing device according to claim 3, characterized in that, The connection between the other end of the fixed connector and the bearing fastener is a magnetically detachable connection. The bearing fastener and / or the fixed connector are provided with magnetic material components, so that the connection between the other end of the fixed connector and the bearing fastener is a magnetically detachable connection.

5. The pressure sensor sensitivity testing device according to claim 1, characterized in that, The gas transmission pipeline is provided with a pressure zone generation unit fixing component, which is fixedly connected to the pressure zone generation unit and the gas transmission pipeline respectively.

6. The pressure sensor sensitivity testing device according to claim 1, characterized in that, The gas transmission pipeline is equipped with several retaining rings, which are air-bag type retaining rings. When air is inflated into the retaining ring, the inner ring size of the retaining ring decreases, and the inner ring of the retaining ring fits against the surface of the transmission component, thus tensioning the transmission belt.

7. The pressure sensor sensitivity testing device according to claim 1, characterized in that, It also includes a pressure regulating box and a support plate. The pressure generating mechanism and the transmission bearing mechanism are fixed on the support plate. The pressure regulating box is provided with a groove that matches the support plate so that the support plate is movably connected to the pressure regulating box. The pressure generating mechanism and the transmission bearing mechanism are installed inside the pressure regulating box.

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