Uplock opening and closing detection sensor and working method thereof

Abstract

The invention discloses an uplock opening and closing detection sensor and a working method thereof. The uplock opening and closing detection sensor comprises a probe assembly and a target assembly which are arranged separately. The probe assembly comprises a probe shell, the probe shell is of a V-shaped structure, an induction circuit board, a power circuit board and an output conversion circuit board which are connected with one another are arranged in the probe shell, the induction circuit board is located at the rear end of the probe shell, a socket is arranged on the side face of the front end of the probe shell, and the output end of the output conversion circuit board is connected with the socket. The problem that the installation space of a product is limited is solved, installation and maintenance can be convenient, and measurement signals can be continuously and reliably provided for a computer on an airplane.

Description

Technical Field

[0001] The present invention belongs to the field of proximity sensors, and relates to an upper lock opening and closing detection sensor and its working method. Background Art

[0002] The upper lock opening and closing detection sensor is installed on the upper lock structure to detect the opening and closing states of the upper lock. The aircraft power system supplies power to the upper lock opening and closing detection sensor, and the upper lock opening and closing detection sensor provides an upper lock opening / closing detection signal to the landing gear normal control unit.

[0003] The existing structural forms of the upper lock opening and closing detection sensors mainly include cylindrical and flange types. Among them, due to the limitations of the installation space and the external dimensions, the internal circuit board layout of the flange-type proximity sensor is compact, resulting in reduced reliability, difficult debugging, and poor maintainability. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned disadvantages of the prior art, and provide an upper lock opening and closing detection sensor and its working method, which solves the problem of limited installation space of the product, can be conveniently installed and maintained, and can continuously and reliably provide measurement signals to the computer on the aircraft.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: An upper lock opening and closing detection sensor, comprising a separately arranged probe assembly and a target assembly; The probe assembly includes a probe housing, the probe housing adopts a V-shaped structure, an induction circuit board, a power supply circuit board and an output conversion circuit board which are connected to each other are arranged in the probe housing, the induction circuit board is located at the rear end of the probe housing, a socket is arranged on the front side surface of the probe housing, and the output end of the output conversion circuit board is connected to the socket.

[0006] Preferably, a rear cover plate is arranged at the rear end of the probe housing, four positioning posts are designed at the four corners of the rear cover plate, four mounting posts are arranged in the probe housing, the induction circuit board is located between the positioning posts and the mounting posts, and M2.5 aluminum countersunk head screws are screwed into the positioning posts, pass through the induction circuit board and then are screwed into the mounting posts, and the induction circuit board is pressed onto the mounting posts through the positioning posts on the rear cover plate.

[0007] Preferably, the socket is fixed on the probe housing by M3 countersunk head screws, spring washers and flat washers.

[0008] Preferably, the power supply circuit board and the output conversion circuit board are respectively fixed in the probe housing by a front cover plate and a lower cover plate.

[0009] Preferably, four positioning posts are provided on both the front cover plate and the lower cover plate, and four mounting posts are provided at the locations where the power circuit board and the output conversion circuit board are installed inside the probe housing. Both the power circuit board and the output conversion circuit board are located between the positioning posts and the mounting posts, and countersunk head screws are used to screw into the positioning posts, pass through the power circuit board and the output conversion circuit board, and then screw into the mounting posts for fastening.

[0010] Preferably, the target assembly includes a magnet and a mounting structure, and the magnet is fixed inside the mounting structure.

[0011] Preferably, a flange-type mounting interface is provided on the probe housing.

[0012] Preferably, a test resistor is provided on the output conversion circuit board.

[0013] Preferably, a conductive rubber strip is provided inside the probe housing, and the conductive rubber strip is filled between the circuit board fixing structure and the cavity wall of the housing.

[0014] A working method of an upper lock opening and closing detection sensor includes the following processes: Fix the target assembly to the moving part of the upper lock, and install the probe assembly on the upper lock; Based on the position change of the target assembly, the induction circuit board outputs an electrical signal corresponding to the magnetic field intensity; The output conversion circuit board generates an unlocking / locking logic signal according to the comparison result of the electrical signal with a preset threshold value and outputs it to the aircraft control unit through a socket.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention designs the sensor in the form of a V-shaped structure, solves the problem of limited installation space of the product, and the internal circuit board is installed in a reasonable and compact layout, achieving the purpose of weight reduction. And the present invention proposes to design the induction circuit function module on the induction circuit board and install and fix it separately, avoiding the repeated installation and disassembly of the induction circuit function module during the debugging of the overall circuit part, improving the positioning accuracy of the induction circuit board and the test repeatability. Greatly improves the installation accuracy of the Hall-type proximity sensor, reduces the installation and adjustment times of the product, improves the reliability and stability, and improves the comprehensive performance of the product.

[0016] Integrate the test resistor that determines the signal output jump point position onto the output conversion circuit board, greatly reducing the matching and debugging times of the test resistor, and improving the reliability, safety and service life of the overall circuit part. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the probe assembly of the present invention; Figure 2This is the structural composition diagram of the upper lock opening and closing detection sensor of the present invention.

[0018] Among them: 1 - Rear cover plate, 2 - M2.5 aluminum countersunk head screw, 3 - Rear cover plate gasket, 4 - Inductive circuit board, 5 - Probe housing, 6 - Socket, 7 - M3 countersunk head screw, 8 - Spring washer, 9 - Flat washer, 10 - Socket gasket, 11 - M2.5 long countersunk head screw, 12 - Front cover plate gasket, 13 - Power circuit board, 14 - Front cover plate, 15 - Output conversion circuit board, 16 - Lower cover plate gasket, 17 - Lower cover plate, 18 - Target assembly, 19 - Probe assembly. Specific embodiments

[0019] The following details the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terms "install", "connect", and "couple" shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection, or a connection capable of mutual communication; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. The term "and / or" used herein includes any and all combinations of one or more of the related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in this invention can be understood according to specific circumstances. The terms used in the description of this invention herein are only for the purpose of describing specific embodiments, and are not intended to limit this invention.

[0022] In this invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0023] The following disclosure provides many different embodiments or examples for implementing different structures of this invention. To simplify the disclosure of this invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit this invention. In addition, this invention may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, this invention provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0024] As Figure 1 shown, the upper lock opening / closing detection sensor for improving the repeat positioning accuracy and reliability according to this invention mainly consists of a separately arranged probe assembly 19 and a target assembly 18; it is used to detect the position state of the upper lock and provide stable and reliable unlocking / locking signals to the aircraft computer.

[0025] The probe assembly 1 includes a rear cover plate 1, an induction circuit board 4, a probe housing 5, a socket 6, and a power supply circuit board 13. The probe housing 5 is of a V-shaped structure, and a flange-type mounting interface is machined on the probe housing 5 for mounting on an aircraft structural member. The rear cover plate 1 and the induction circuit board 4 are mounted to the rear end of the probe housing 5. Four positioning posts are designed at the four corners of the rear cover plate 1, and four mounting posts for the induction circuit board 4 are provided inside the probe housing 5. The induction circuit board 4 is located between the positioning posts and the mounting posts. The induction circuit board 4 is pressed onto the mounting posts through the positioning posts on the rear cover plate 1, sealed inside the probe housing 5 using a rear cover gasket 3, and fastened with M2.5 aluminum countersunk head screws 2 screwed into the positioning posts, passing through the induction circuit board 4 and then into the mounting posts. The socket 6 is mounted on the rear side of the front end of the probe housing 5 through M3 countersunk head screws 7, spring washers 8, and flat washers 9, cross-linked with the on-board cable, and sealed using a socket gasket 10.

[0026] A Hall chip is soldered on the induction circuit board 4, which can sense the magnetic field strength provided by the target assembly 18, thereby providing corresponding electrical signals to the on-board computer. The countersunk head screws 2 are made of non-magnetic aluminum alloy material to prevent interference with the magnetic field distribution around the probe assembly. The power supply circuit board 13 is installed inside the probe housing 5 and supported by the positioning posts on the front cover plate 14. Four positioning posts are designed at the four corners of the front cover plate 14, which can effectively limit the position of the power supply circuit board 13. Four mounting posts for the power supply circuit board 13 are provided inside the probe housing 5. The power supply circuit board 13 is located between the positioning posts and the mounting posts. The power supply circuit board 13 is pressed onto the mounting posts through the positioning posts on the front cover plate 14, sealed using a front cover gasket 12, and then fastened with countersunk head screws 11 screwed into the positioning posts, passing through the power supply circuit board 13 and then into the mounting posts.

[0027] The output conversion circuit board 15 is installed on the probe housing 5. Four positioning posts are also designed at the four corners of the lower cover plate 17, which can effectively limit the position of the output conversion circuit board 15. Four positioning posts are designed at the four corners of the lower cover plate 17, which can effectively limit the position of the output conversion circuit board 15. Four mounting posts for the output conversion circuit board 15 are provided inside the probe housing 5. The output conversion circuit board 15 is located between the positioning posts and the mounting posts. The output conversion circuit board 15 is pressed onto the mounting posts through the positioning posts on the lower cover plate 17. After being supported by the positioning posts on the lower cover plate 17, the output conversion circuit board 15 is sealed using a lower cover gasket 16, and then fastened with countersunk head screws screwed into the positioning posts, passing through the output conversion circuit board 15 and then into the mounting posts.

[0028] The induction circuit board 4, the power supply circuit board 13, and the output conversion circuit board 15 are respectively connected to each other through wires, and the output conversion circuit board 15 is connected to the socket 6 through a wire.

[0029] The target assembly 18 is used to provide a stable magnetic field. During the process of the probe assembly 19 approaching and moving away from the target assembly 18, the induction circuit in the probe assembly 19 senses the intensity of the magnetic field and outputs different electrical signals within different magnetic field strength ranges.

[0030] The overall design of the sensor is a fully sealed structure, which can effectively resist harsh natural environments such as external acidic atmosphere, heat and humidity, sand and dust, salt spray, and mildew; the internal structure is all reliably fixed, which can effectively resist complex mechanical environments such as vibration, shock, and acceleration.

[0031] As Figure 2 shown, when in use, the following functions can be achieved: Fix the target assembly 18 to the upper lock moving part, and install the probe assembly 19 on the upper lock.

[0032] Based on the position change of the target assembly 18, the induction circuit board 4 outputs an electrical signal corresponding to the magnetic field strength.

[0033] The output conversion circuit board 15 generates an unlocking / locking logic signal according to the comparison result of the electrical signal with the preset threshold value and outputs it to the aircraft control unit through the socket 6.

[0034] The present invention proposes to design the induction circuit function module on the induction circuit board 4 and install and fix it separately, avoiding the repeated installation and disassembly of the induction circuit function module during the debugging of the overall circuit part, improving the positioning accuracy of the induction circuit board 4, and the test repeatability.

[0035] The present invention proposes to integrate the test resistor that determines the signal output jump point position onto the output conversion circuit board 15, greatly reducing the matching and debugging times of the test resistor, and improving the reliability, safety, and service life of the overall circuit part.

[0036] The present invention designs the sensor in the form of a V-shaped structure, solves the problem of limited installation space of the product, and the internal circuit board is installed and laid out reasonably and compactly, achieving the purpose of weight reduction.

[0037] The serial numbers of the above embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0038] In the above embodiments of the present application, the descriptions of each embodiment have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0039] In several embodiments provided by the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are merely illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of units or modules can be in an electrical or other form.

[0040] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0041] The above is only the preferred embodiment of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

[0042] It should be understood that the above description is for illustrative purposes and not for limitation. By reading the above description, many embodiments and many applications other than the provided examples will be obvious to those skilled in the art. Therefore, the scope of this patent should not be determined with reference to the above description, but should be determined with reference to the full scope of the foregoing claims and the equivalents of these claims. For the sake of comprehensiveness, all articles and references including patent applications and published announcements are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended to abandon such subject matter, nor should it be considered that the applicant has not considered such subject matter as part of the disclosed inventive subject matter.

Claims

1. An upper lock opening and closing detection sensor, characterized in that, It includes a separately arranged probe assembly (19) and a target assembly (18); The probe assembly (19) includes a probe housing (5). The probe housing (5) adopts a V-shaped structure. An induction circuit board (4), a power supply circuit board (13) and an output conversion circuit board (15) which are connected to each other are arranged in the probe housing (5). The induction circuit board (4) is located at the rear end of the probe housing (5). A socket (6) is arranged on the front side of the front end of the probe housing (5). The output end of the output conversion circuit board (15) is connected to the socket (6).

2. The upper lock opening and closing detection sensor according to claim 1, characterized in that, A rear cover plate (1) is arranged at the rear end of the probe housing (5). Four positioning posts are designed at the four corners of the rear cover plate (1). Four mounting posts are arranged in the probe housing (5). The induction circuit board (4) is located between the positioning posts and the mounting posts. The M2.5 aluminum countersunk head screw (2) is screwed into the positioning post, passes through the induction circuit board (4) and then is screwed into the mounting post. The induction circuit board (4) is pressed onto the mounting post through the positioning posts on the rear cover plate (1).

3. The upper lock opening / closing detection sensor according to claim 1, characterized in that, The socket (6) is fixed on the probe housing (5) by using an M3 countersunk head screw (7), a spring washer (8) and a flat washer (9).

4. The upper lock opening / closing detection sensor according to claim 1, wherein The power supply circuit board (13) and the output conversion circuit board (15) are respectively fixed in the probe housing (5) by using a front cover plate (14) and a lower cover plate (17).

5. The upper lock opening / closing detection sensor according to claim 4, characterized in that Both the front cover plate (14) and the lower cover plate (17) are provided with four positioning posts. Four mounting posts are arranged at the positions where the power supply circuit board (13) and the output conversion circuit board (15) are installed in the probe housing (5). Both the power supply circuit board (13) and the output conversion circuit board (15) are located between the positioning posts and the mounting posts. The countersunk head screw (11) is screwed into the positioning post, passes through the power supply circuit board (13) and the output conversion circuit board (15) and then is screwed into the mounting post for fastening.

6. The upper lock opening / closing detection sensor according to claim 1, characterized in that, The target assembly (18) includes a magnet and a mounting structure. The magnet is fixed inside the mounting structure.

7. The upper lock opening / closing detection sensor according to claim 1, characterized in that, A flange-type mounting interface is arranged on the probe housing (5).

8. The upper lock opening / closing detection sensor according to claim 1, wherein A test resistor is arranged on the output conversion circuit board (15).

9. The upper lock opening / closing detection sensor according to claim 1, wherein A conductive rubber strip (17) is arranged in the probe housing (5). The conductive rubber strip (17) is filled between the circuit board fixing structure and the cavity wall of the housing.

10. A working method of the upper lock opening and closing detection sensor according to any one of claims 1-9, characterized in that, It includes the following processes: Fix the target assembly (18) on the upper lock moving part, and install the probe assembly (19) on the upper lock; Based on the position change of the target assembly (18), the induction circuit board (4) outputs an electric signal corresponding to the magnetic field intensity; The output conversion circuit board (15) generates an unlocking / locking logic signal according to the comparison result of the electric signal and the preset threshold value and outputs it to the aircraft control unit through the socket (6).

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