Air pressure sensor protection structure, barometer and drone

Abstract

The present invention discloses a pressure sensor protection structure, a barometer and an unmanned aerial vehicle. The pressure sensor protection structure includes a protection cover and a slow-flow medium; the protection cover includes a cover body and a plurality of partitions; the cover body is provided with at least two air inlets, and the cover body has a cavity; the partition is fixedly connected to the cover body, and the partition divides the cavity into a pressure measuring cavity and a plurality of slow-flow cavities; an air flow channel is provided on the partition. The present invention discloses that the interference of air flow changes on the pressure sensor can be effectively reduced through the interaction between the airflows entering the protection cover through different air inlets and the multi-stage slow-flow effect of the slow-flow cavity and the slow-flow medium, thereby ensuring the measurement accuracy of the pressure sensor.

Description

Technical Field

[0001] The present invention relates to the field of barometers, and more specifically, to a pressure sensor protection structure, a barometer and an unmanned aerial vehicle. Background Art

[0002] With the rapid development of smart electronic devices, people have put forward higher and higher requirements on the functions of smart electronic devices. Air pressure sensors can measure atmospheric pressure, so they have also been widely used. The pressure measured by air pressure sensors is static pressure, which is easily affected by airflow changes. When strong or large airflow is injected into the location of the air pressure sensor, the measured value of the air pressure sensor will produce a large error.

[0003] Take drones as an example. Drones usually use a chip that integrates an air pressure sensor and an acceleration sensor to achieve the function of determining altitude. When the altitude of the drone changes, a strong or large airflow is quickly injected into the location of the air pressure sensor, causing the measurement accuracy of the air pressure sensor to decrease.

[0004] Therefore, how to reduce the interference of airflow changes on the air pressure sensor has become a technical problem that urgently needs to be solved in this field. Summary of the invention

[0005] An object of the present invention is to provide a new technical solution for a pressure sensor protection structure that can reduce the interference of airflow changes on the pressure sensor.

[0006] According to a first aspect of the present invention, a pressure sensor protection structure is provided.

[0007] The air pressure sensor protection structure includes a protective cover and a slow flow medium; wherein,

[0008] The protective cover comprises a cover body and a plurality of partitions;

[0009] The cover body is provided with at least two air inlet holes, and the cover body has a cavity;

[0010] The partition is connected to the cover body, and the partition divides the cavity into a pressure measuring cavity and a plurality of slow flow cavities;

[0011] The slow flow medium is filled in the pressure measuring cavity and each of the slow flow cavities, and each of the air inlet holes corresponds to a different slow flow cavity;

[0012] An air flow channel is provided on the partition, and the air flow channel is configured to conduct the slow flow chamber and the pressure measuring chamber, so that the air flow entering the protective cover from the air inlet hole flows through at least one of the slow flow chambers and then enters the pressure measuring chamber.

[0013] Optionally, the airflow entering the protective cover from the air inlet flows through at least two of the slow flow chambers and then enters the pressure measuring chamber.

[0014] Optionally, the airflow entering the protective cover from the air inlet hole enters the pressure measuring chamber along a single path.

[0015] Optionally, the cover body is provided with two air inlet holes;

[0016] Along the flow path of the air flow, the figure formed by the connecting line between the air inlet hole and the air flow channel is symmetrical about the center of gravity of the pressure measuring chamber.

[0017] Optionally, the volume of the slow flow cavity corresponding to the air inlet hole is larger than the volume of other slow flow cavities.

[0018] Optionally, adjacent partitions are perpendicular to each other.

[0019] Optionally, a mounting hole is provided on the cover body.

[0020] Optionally, the air pressure sensor protection structure further includes a sealing gasket;

[0021] The sealing gasket is provided with openings corresponding to the pressure measuring cavity and each of the slow flow cavities one by one.

[0022] According to a second aspect of the present invention, a barometer is provided.

[0023] The barometer includes an air pressure sensor and an air pressure sensor protection structure of the present invention;

[0024] The air pressure sensor protective structure cover is arranged on the air pressure sensor, and the air pressure sensor is located in the pressure measuring cavity.

[0025] According to a third aspect of the present invention, a drone is provided.

[0026] The drone includes the barometer of the present invention.

[0027] According to one embodiment of the present disclosure, the airflow entering the protective cover from the air inlet hole enters the pressure measuring chamber after being buffered by the slow flow chamber and the slow flow medium. Through the interaction between the airflows entering the protective cover through different air inlet holes and the multi-stage slow flow effect of the slow flow chamber and the slow flow medium, the interference of the air flow change on the air pressure sensor can be effectively reduced, thereby ensuring the measurement accuracy of the air pressure sensor.

[0028] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0030] Figure 1 It is a structural schematic diagram from one perspective of an embodiment of the air pressure sensor protection structure disclosed in the present invention.

[0031] Figure 2 It is a structural schematic diagram of another perspective of an embodiment of the air pressure sensor protection structure disclosed in the present invention.

[0032] Figure 3 It is a schematic diagram of an explosion of an embodiment of the air pressure sensor protection structure disclosed in the present invention.

[0033] Figure 4 This is a structural schematic diagram from one perspective of an embodiment of a protective cover of the air pressure sensor protection structure disclosed in the present invention.

[0034] Figure 5 This is a structural schematic diagram of another perspective of an embodiment of a protective cover of the air pressure sensor protection structure disclosed in the present invention.

[0035] The following are marked in the figure:

[0036] Protective cover-1, cover body-11, air inlet-111, mounting hole-112, partition-12, air flow channel-120, pressure measuring chamber-13, slow flow chamber-14, slow flow medium-2, sealing gasket-3. DETAILED DESCRIPTION

[0037] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0038] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0039] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0040] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0041] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0042] like Figures 1 to 5 As shown, the present disclosure provides an air pressure sensor protection structure.

[0043] The air pressure sensor protection structure comprises a protection cover 1 and a slow flow medium 2. The slow flow medium 2 can be, for example, sponge or foam.

[0044] The protective cover 1 includes a cover body 11 and a plurality of partitions 12. At least two air inlet holes 111 are provided on the cover body 11, and a cavity is provided inside the cover body 11. The air inlet holes 111 connect the outside world and the cavity inside the cover body 11, so that the outside air flow can enter the protective cover 1. The number of air inlet holes 111 on the cover body 11 can be set according to actual needs. The partition 12 is connected to the cover body 11, and the partition 12 divides the cavity into a pressure measuring chamber 13 and a plurality of slow flow chambers 14. The connection between the partition 12 and the cover body 11 can be achieved by welding or integral molding. The number of slow flow chambers 14 can be flexibly set according to the pressure measurement requirements. The pressure measuring chamber 13 usually corresponds to the measuring part of the air pressure sensor, and the air pressure sensor can measure the pressure in the pressure measuring chamber 13.

[0045] The slow flow medium 2 is filled in the pressure measuring chamber 13 and each slow flow chamber 14. In specific implementation, multiple slow flow media 2 can be filled in the pressure measuring chamber 13 and different slow flow chambers 14. Each air inlet 111 corresponds to a different slow flow chamber 14, that is, different air inlet holes 111 are located on the cavity wall of different slow flow chambers 14.

[0046] An airflow channel 120 is provided on the partition 12. The airflow channel 120 can connect the slow flow chamber 14 and the pressure measuring chamber 13, so that the airflow entering the protective cover 1 from the air inlet 111 flows through at least one slow flow chamber 14 and then enters the pressure measuring chamber 13. The airflow channel 120 can be located on the partition 12 between adjacent slow flow chambers 14, and can also be located on the partition 12 between adjacent slow flow chambers 14 and pressure measuring chambers 13. The airflow channel 120 can be, for example, a hole on the partition 12, or a notch on the partition 12. The airflow channel 120 can optionally be a notch on the partition 12 and the depth of the notch is less than the height of the partition 12 to ensure the strength of the protective cover 1.

[0047] The airflow entering the protective cover 1 from the air inlet 111 is initially located in the slow flow cavity 14 corresponding to the air inlet 111. Then, the airflow flows through the slow flow medium 2 and enters another slow flow cavity 14 through the air flow channel 120, and then enters the pressure measuring cavity 13 from the other slow flow cavity 14 and flows through the slow flow medium 2 in the pressure measuring cavity 13, or the airflow flows through the slow flow medium 2 and directly enters the pressure measuring cavity 13 from the slow flow cavity 14 corresponding to the air inlet 111 through the air flow channel 120 and flows through the slow flow medium 2 in the pressure measuring cavity 13.

[0048] The airflow entering the protective cover 1 from the air inlet 111 enters the pressure measuring chamber 13 after being buffered by the slow flow chamber 14 and the slow flow medium 2. The airflow entering the protective cover 1 through different air inlet holes 111 interacts with each other and the multi-stage slow flow effect of the slow flow chamber 14 and the slow flow medium 2, and the interference of the airflow change on the air pressure sensor can be effectively reduced, thereby ensuring the measurement accuracy of the air pressure sensor. In addition, the air pressure sensor protection structure can also effectively filter noise to prevent noise from affecting the measurement accuracy of the air pressure sensor.

[0049] Optionally, the airflow entering the protective cover 1 from the air inlet 111 flows through at least two slow flow chambers 14 and then enters the pressure measuring chamber 13. In this way, the airflow can flow through at least two slow flow chambers 14 and the pressure measuring chamber 13 as well as the slow flow medium 2 in each chamber, thereby fully and effectively reducing the interference of airflow changes on the air pressure sensor.

[0050] Furthermore, the airflow entering the protective cover 1 from the air inlet 111 enters the pressure measuring chamber 13 along a single path. In this way, the airflows entering from different air inlet holes 111 will not contact each other before flowing into the pressure measuring chamber 13, ensuring sufficient slow flow of the airflow in the slow flow chamber 14 and the slow flow medium 2.

[0051] Furthermore, two air inlet holes 111 are provided on the cover body 11. Along the flow path of the airflow, the figure formed by the connecting lines between the air inlet holes 111 and the airflow channel 120 is symmetrical about the center of gravity of the pressure measuring chamber 13. This arrangement can make the flow state of the airflow entering the pressure measuring chamber 13 from different air inlet holes 111 consistent, which is conducive to more effectively reducing the interference of airflow changes on the air pressure sensor.

[0052] When two air inlet holes 111 are provided on the cover body 11, the setting requirements of the air inlet hole 111 and the air flow channel 120 are explained by taking the example of the air flow passing through two slow flow chambers 14 and then entering the pressure measuring chamber 13. Along the flow path of the air flow from one air inlet hole 111 into the protective cover 1, the center of the air inlet hole 111, the center of the air flow channel 120 on the partition 12 between the two slow flow chambers 14, the center of the air flow channel 120 on the partition 12 between the slow flow chamber 14 and the pressure measuring chamber 13, and the center of the air inlet hole 111 are connected in sequence to form a triangle. Similarly, along the flow path of the air flow entering the protective cover 1 from another air inlet hole 111, the connecting line between the air inlet hole 111 and the air flow channel 120 can form another triangle. The above two triangles are symmetrical about the center of gravity of the pressure measuring chamber 13.

[0053] Optionally, the volume of the slow flow cavity 14 corresponding to the air inlet 111 is larger than the volume of other slow flow cavities 14, so as to more fully and effectively reduce the interference of air flow changes on the air pressure sensor.

[0054] Optionally, adjacent partitions 12 are perpendicular to each other to form a more regular airflow in the protective cover 1. The adjacent partitions 12 mentioned above refer to partitions 12 that are directly connected together.

[0055] The cover body 111 can be installed on the air pressure sensor by gluing or bolting. Optionally, a mounting hole 112 is provided on the cover body 11. Those skilled in the art can conveniently and reliably install the protective cover 1 on the air pressure sensor by matching the mounting hole 112 with the bolt.

[0056] Optionally, the air pressure sensor protection structure further includes a sealing gasket 3. The sealing gasket 3 is provided with openings corresponding to the pressure measuring cavity 13 and each slow flow cavity 14. The sealing gasket 3 can play a sealing role between the protective cover 1 and the air pressure sensor, effectively reducing the interference of airflow changes on the air pressure sensor.

[0057] Below, the air pressure sensor protection structure disclosed in the present invention is described by taking the embodiment shown in the accompanying drawings as an example:

[0058] like Figure 3 and Figure 4 As shown, the air pressure sensor protection structure includes a protection cover 1, a flow-reducing medium 2 and a sealing gasket 3.

[0059] The protective cover 1 includes a cover body 11 and a plurality of partitions 12. Two air inlet holes 111 are provided on the cover body 11, and a cavity is provided inside the cover body 11. The air inlet holes 111 communicate with the outside and the cavity inside the cover body 11, so that the outside air flow can enter the protective cover 1. The partition 12 is integrally formed with the cover body 11, and the partition 12 divides the cavity into a pressure measuring chamber 13 and four slow flow chambers 14, and the connected partitions 12 are arranged vertically. The volume of the slow flow chamber 14 corresponding to the air inlet hole 111 is larger than the volume of other slow flow chambers 14. An air flow channel 120 is provided on the partition 12, and the air flow channel 120 is a notch on the partition 12. The air flow entering the protective cover 1 from the air inlet hole 111 flows through the two slow flow chambers 14 and then enters the pressure measuring chamber 13, and the air flows from different air inlet holes 111 to the pressure measuring chamber 13 are independent of each other.

[0060] Along the flow path of the airflow, the figure formed by the line between the air inlet 111 and the airflow channel 120 is symmetrical about the center of gravity of the pressure measuring chamber 13. Specifically, along the flow path of the airflow entering the protective cover 1 from an air inlet 111, the center of the airflow channel 120 on the partition 12 between the two slow flow chambers 14, the center of the airflow channel 120 on the partition 12 between the slow flow chamber 14 and the pressure measuring chamber 13, and the center of the air inlet 111 are connected in sequence to form a triangle. Similarly, along the flow path of the airflow entering the protective cover 1 from another air inlet 111, the line between the air inlet 111 and the airflow channel 120 can form another triangle. The above two triangles are symmetrical about the center of gravity of the pressure measuring chamber 13.

[0061] The slow flow medium 2 is a sponge. A plurality of slow flow mediums 2 are respectively filled in the pressure measuring cavity 13 and each slow flow cavity 14.

[0062] The sealing gasket 3 is also provided with openings corresponding to the pressure measuring chamber 13 and each slow flow chamber 14. The cover body 11 is provided with a mounting hole 112, and the sealing gasket 3 is provided with a hole structure corresponding to the mounting hole 112. The air pressure sensor protection structure can be installed on the air pressure sensor by the cooperation of the bolts with the mounting hole 112 and the hole structure on the sealing gasket 3. The air pressure sensor measures the pressure in the pressure measuring chamber 13.

[0063] The present disclosure also provides a barometer.

[0064] The barometer includes a pressure sensor and a pressure sensor protection structure of the present invention. The pressure sensor protection structure cover is arranged on the pressure sensor, and the pressure sensor is located in the pressure measuring cavity 13. Generally, the pressure sensor can be arranged on a chip, and the pressure measuring cavity 13 can correspond to the measuring part of the pressure sensor on the chip. The barometer of the present invention is less disturbed by airflow changes, and the pressure sensor has high measurement accuracy.

[0065] The present disclosure also provides a drone.

[0066] The drone includes the barometer disclosed in the present invention. The drone disclosed in the present invention is less disturbed by airflow changes when measuring pressure, and the air pressure sensor has high measurement accuracy, which is conducive to accurately achieving the altitude setting of the drone.

[0067] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A pressure sensor protection structure, characterized in that: It includes a protective cover and a slow-flow medium; wherein, The protective cover comprises a cover body and a plurality of partitions; The cover body is provided with at least two air inlet holes, and the cover body has a cavity; The partition is connected to the cover body, and the partition divides the cavity into a pressure measuring cavity and a plurality of slow flow cavities; the volume of the slow flow cavity corresponding to the air inlet hole is larger than the volume of the other slow flow cavities; The slow flow medium is filled in the pressure measuring cavity and each of the slow flow cavities, and each of the air inlet holes corresponds to a different slow flow cavity; The partition is provided with an airflow channel, and the airflow channel is configured to conduct the slow flow cavity and the pressure measuring cavity, so that the airflow entering the protective cover from the air inlet flows along a single path through at least one of the slow flow cavities and then enters the pressure measuring cavity; the airflow channel is a hole on the partition, or a notch on the partition; Along the flow path of the air flow, the figure formed by the connecting line between the air inlet hole and the air flow channel is symmetrical about the center of gravity of the pressure measuring chamber.

2. The air pressure sensor protection structure according to claim 1, characterized in that: The airflow entering the protective cover from the air inlet flows through at least two slow flow chambers and then enters the pressure measuring chamber.

3. The air pressure sensor protection structure according to claim 2, characterized in that: The cover body is provided with two air inlet holes.

4. The air pressure sensor protection structure according to claim 1, characterized in that: The adjacent partitions are perpendicular to each other.

5. The air pressure sensor protection structure according to any one of claims 1 to 4, characterized in that: The cover body is provided with a mounting hole.

6. The air pressure sensor protection structure according to any one of claims 1 to 4, characterized in that: The air pressure sensor protection structure also includes a sealing gasket; The sealing gasket is provided with openings corresponding to the pressure measuring cavity and each of the slow flow cavities one by one.

7. A barometer, characterized in that: A device comprising an air pressure sensor and an air pressure sensor protection structure as claimed in any one of claims 1 to 6; The air pressure sensor protective structure cover is arranged on the air pressure sensor, and the air pressure sensor is located in the pressure measuring cavity.

8. A drone, characterized in that: Comprising the barometer as claimed in claim 7.

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