Barometric altitude and wind speed sensor

Abstract

The utility model provides a kind of air pressure height wind speed sensor, including pedestal, the pedestal top surface is equipped with first recess, the bottom surface of the first recess is also equipped with second recess, the first recess is bonded with PCB circuit board, silicon piezoresistance differential pressure sensitive element is bonded in second recess and top end penetrates PCB circuit board, silicon piezoresistance absolute pressure sensitive element and temperature sensor are equipped on PCB circuit board, silicon piezoresistance differential pressure sensitive element, silicon piezoresistance absolute pressure sensitive element and temperature sensor are electrically connected to PCB circuit board;The top surface of the pedestal is welded shell, first connector seat is installed on the shell and communicated to the inside, second connector seat is installed on the sidewall of the pedestal, second connector seat is communicated to the bottom of second recess by the through-hole inside the pedestal, lead wire welded on PCB circuit board penetrates shell and is connected to outside.The whole installation structure is fixed reliably, and each component is connected by precision mechanical structure and electricity, to ensure that sensor can work normally under various complex environments.

Description

Technical Field

[0001] This utility model relates to a barometric altitude and wind speed sensor. Background Technology

[0002] Silicon piezoresistive pressure measurement-based barometric altimeter and wind speed sensors have crucial applications in numerous fields, including meteorological monitoring, aerospace, and UAV flight control. In meteorological monitoring, accurate barometric altimeter and wind speed data are key to accurate weather forecasts, enabling meteorological departments to issue timely and accurate weather warnings and providing reliable meteorological information for people's lives and work. In the aerospace field, the safe flight of aircraft relies on accurate measurements of barometric altimeter and wind speed. This data is essential for the takeoff, cruise, and landing processes of aircraft, ensuring flight safety and the successful completion of flight missions. In UAV flight control, barometric altimeter and wind speed sensors help UAVs achieve stable flight, precise hovering, and flight along predetermined routes, expanding the applications of UAVs in aerial photography, surveying, and logistics delivery.

[0003] Traditional barometric altimeter and anemometer sensors have significant shortcomings in many aspects, limiting their application in high-precision scenarios. Regarding accuracy, common mechanical barometric altimeters, for example, rely on the deformation of mechanical structures to measure air pressure changes. Due to friction and gaps between mechanical components, the measurement accuracy is difficult to exceed ±5 meters, failing to meet the precise altitude measurement requirements of aerospace applications. During critical phases such as takeoff and landing, such accuracy errors can pose serious safety hazards. Cost is also a significant issue for traditional barometric altimeter and anemometer sensors. Some high-precision sensors employ complex manufacturing processes and expensive materials, resulting in high production costs. Some imported high-end sensors can cost tens of thousands of yuan, which is a huge economic burden for large-scale applications such as the construction of meteorological monitoring networks and the widespread use of civilian drones, limiting the promotion and development of related technologies. Utility Model Content

[0004] This invention proposes a barometric altitude and wind speed sensor, which aims to solve the problems of low accuracy, poor stability and high cost of traditional barometric altitude and wind speed sensors. The entire installation structure is fixed and reliable, and the components are connected by precision mechanical structure and electrical connection to ensure that the sensor can work normally in various complex environments.

[0005] The technical solution of this utility model is implemented as follows: A barometric altitude and wind speed sensor includes a base. The top surface of the base has a first groove, and the bottom surface of the first groove has a second groove. A PCB circuit board is bonded and mounted within the first groove. A silicon piezoresistive differential pressure sensing element is bonded within the second groove, with its top end penetrating the PCB circuit board. A silicon piezoresistive absolute pressure sensing element and a temperature sensor are mounted on the PCB circuit board, and are electrically connected to the PCB circuit board. A housing is welded to the top surface of the base. A first connecting pipe seat communicating with the interior is mounted on the housing. A second connecting pipe seat is mounted on the side wall of the base, and the second connecting pipe seat communicates with the bottom of the second groove through a through hole inside the base. Leads welded to the PCB circuit board pass through the housing and connect to the outside.

[0006] Preferably, the top of the first groove is also provided with a protective cover, through which the lead wire passes, and the side wall of the protective cover is provided with an opening.

[0007] Preferably, the protective cover is fixed in the first groove by a locking screw.

[0008] Preferably, the first and second connecting pipe seats each include a hollow seat body, the outer wall of the seat body is provided with threads, the seat body is respectively threadedly connected to the first mounting groove on the base or the outer shell and communicates with the interior, the locking nut is threadedly sleeved on the seat body, and a sealing gasket is also sleeved on the seat body, the sealing gasket is pressed into the first mounting groove by the locking nut.

[0009] Preferably, the outer casing is further provided with a second mounting groove, the second mounting groove being interference-fitted into the mounting limiting block, and the lead wire passing through the wire hole of the second mounting groove and the limiting block.

[0010] The beneficial effects of this invention are as follows: by optimizing the structural design of the sensor, the measurement accuracy of barometric altitude and wind speed is improved, the influence of environmental factors on the measurement results is reduced, and the stability and reliability of the sensor are enhanced. At the same time, by adopting advanced manufacturing processes and integration technologies, the production cost of the sensor is reduced, enabling it to be widely used in meteorological monitoring, aerospace and UAV flight control and other fields, meeting the needs of different users for high-precision barometric altitude and wind speed measurement. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the disassembled structure of this utility model.

[0014] Figure 3 This is a cross-sectional structural diagram of the present invention. Detailed Implementation

[0015] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] like Figure 1-3 A barometric altitude and wind speed sensor is shown, comprising a base 1. The top surface of the base 1 has a first groove 101, and the bottom surface of the first groove 101 has a second groove 102. A PCB circuit board 2 is bonded and installed in the first groove 101. A silicon piezoresistive differential pressure sensing element 3 is bonded in the second groove 102 and its top end penetrates through the PCB circuit board 2. A silicon piezoresistive absolute pressure sensing element 4 and a temperature sensor 5 are disposed on the PCB circuit board 2. The silicon piezoresistive differential pressure sensing element 3, the silicon piezoresistive absolute pressure sensing element 4, and the temperature sensor 5 are all electrically connected to the PCB circuit board 2. A shell 6 is welded to the top surface of the base 1. A first connecting pipe seat 7 communicating with the interior is installed on the shell 6. A second connecting pipe seat 8 is installed on the side wall of the base 1. The second connecting pipe seat 8 communicates with the bottom of the second groove 102 through a through hole inside the base. A lead wire 12 welded on the PCB circuit board 2 passes through the shell 6 and connects to the outside.

[0017] As a preferred embodiment, a protective cover 9 is also provided on the top of the first groove 101, through which the lead wire 12 passes. An opening 10 is provided on the side wall of the protective cover 9, and the protective cover 9 is fixed inside the first groove 101 by a locking screw 11. The protective cover 9 is made of non-metallic material primarily to protect the internal components, preventing damage to the internal components and gold wires from contact with people or objects during sensor production and semi-finished product calibration testing. The outer shell 6 is made of metallic material, which is welded to the base 1 to form a complete structure and also provides installation conditions for the connector seat.

[0018] As a preferred embodiment, the first connector 7 and the second connector 8 each include a hollow seat body 71. The outer wall of the seat body 71 is provided with threads. The seat body 71 is threadedly connected to the first mounting groove 13 on the base 1 or the outer shell 6 and communicates with the interior. The locking nut 72 is threadedly sleeved on the seat body 71. A sealing gasket 73 is also sleeved on the seat body 71. The sealing gasket 73 is pressed into the first mounting groove 13 by the locking nut 72, which can achieve airtight isolation between the inside and outside and avoid the problem of poor mechanical installation sealing affecting the test results.

[0019] As a preferred embodiment, the outer casing 6 is further provided with a second mounting groove 14, which is interference-fitted into the mounting limiting block 15. The lead wire 12 passes through the wire hole of the second mounting groove 14 and the limiting block 15, thereby ensuring the neat arrangement of the wire harness and limiting the lead wire.

[0020] This invention, once installed, can collect airflow from two directions. The core component, a silicon piezoresistive pressure sensor, is manufactured using MEMS technology. The silicon piezoresistive differential pressure sensor is installed in a recessed position inside the base. Its silicon diaphragm is directly exposed to the atmosphere on both sides through two connecting pipes, enabling it to quickly and accurately sense changes in the pressure difference between static and dynamic pressures for wind speed measurement. One opening faces the airflow direction to measure the total pressure of the airflow; the other opening is perpendicular to the airflow direction to measure the static pressure. According to Bernoulli's equation, the dynamic pressure of the airflow is equal to the difference between the total pressure and the static pressure, and the dynamic pressure is proportional to the square of the wind speed. By measuring the difference between the total and static pressures, the silicon piezoresistive pressure sensor converts this difference into an electrical signal output. The signal processing circuit amplifies, filters, and performs analog-to-digital conversion on this electrical signal. Based on a pre-calibrated wind speed and pressure difference curve, the current wind speed is calculated, thus determining the wind speed. Silicon piezoresistive pressure sensing elements can accurately acquire changes in atmospheric pressure. The front of the silicon diaphragm is directly exposed to the atmosphere, enabling it to quickly and accurately sense changes in atmospheric pressure and is used to measure barometric altitude parameters; temperature sensors monitor ambient temperature in real time.

[0021] The entire installation structure is fixed and reliable. The components are connected by precise mechanical structures and electrical connections to form a compact and stable whole, ensuring that the sensor can work normally in various complex environments. There is no friction or gap effect, the internal temperature is accurately collected, and it is less affected by airflow, which can reduce the error range.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A barometric altitude and wind speed sensor, characterized in that, The base (1) includes a base (1), the top surface of which is provided with a first groove (101), and the bottom surface of the first groove (101) is provided with a second groove (102). A PCB circuit board (2) is bonded and installed in the first groove (101). A silicon piezoresistive differential pressure sensitive element (3) is bonded in the second groove (102) and its top end penetrates through the PCB circuit board (2). A silicon piezoresistive absolute pressure sensitive element (4) and a temperature sensor (5) are disposed on the PCB circuit board (2). The silicon piezoresistive differential pressure sensitive element (3), the silicon piezoresistive absolute pressure sensitive element (4) and the temperature sensor (5) are all electrically connected to the PCB circuit board (2). A shell (6) is welded to the top surface of the base (1). A first connecting pipe seat (7) is installed on the shell (6) and communicates with the interior. A second connecting pipe seat (8) is installed on the side wall of the base (1). The second connecting pipe seat (8) communicates with the bottom of the second groove (102) through a through hole inside the base (1). A lead wire (12) welded on the PCB circuit board (2) passes through the shell (6) and connects to the outside.

2. The barometric altimeter and anemometer sensor as described in claim 1, characterized in that, The top of the first groove (101) is also provided with a protective cover (9), and the lead wire (12) passes through the protective cover (9). The side wall of the protective cover (9) is provided with an opening (10).

3. A barometric altimeter and anemometer sensor as described in claim 2, characterized in that, The protective cover (9) is fixed in the first groove (101) by a locking screw (11).

4. A barometric altimeter and wind speed sensor as described in claim 1, characterized in that, The first connector (7) and the second connector (8) each include a hollow seat (71). The outer wall of the seat (71) is provided with threads. The seat (71) is threadedly connected to the first mounting groove (13) on the base (1) or the outer shell (6) and communicates with the interior. The locking nut (72) is threadedly sleeved on the seat (71). The seat (71) is also sleeved with a sealing gasket (73). The sealing gasket (73) is pressed into the first mounting groove (13) by the locking nut (72).

5. A barometric altimeter and wind speed sensor as described in claim 1, characterized in that, The outer casing (6) is also provided with a second mounting groove (14), which is interference-fitted into the mounting limit block (15), and the lead wire (12) passes through the wire hole of the second mounting groove (14) and the limit block (15).

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