Quick-response semi-armored temperature sensor

Abstract

The invention discloses a quick-response semi-armored temperature sensor. The quick-response semi-armored temperature sensor comprises a tube shell and a temperature sensitive element, the tube shell is provided with a cavity, and at least one axial window is formed in a tube section at the front end of the tube shell; the temperature sensitive element is arranged in a cavity of the front end pipe section of the pipe shell, the temperature sensitive element is sleeved with a package, a plurality of axial protruding edges are arranged on the outer wall of the package, and the protruding edges packaged outside the temperature sensitive element make contact with the inner wall of the front end pipe section of the pipe shell. And at least one part of the temperature sensitive element is exposed out of the tube shell through the window. Under the condition that the environmental adaptability of the sensor is not reduced, the dynamic response characteristic of the sensor is greatly improved, and the real-time performance of a control system / device is improved.

Description

Technical Field

[0001] The invention belongs to the field of temperature sensors and relates to a semi-armored temperature sensor with fast response. Background Art

[0002] Temperature sensors are one of the most commonly used sensors on aircraft, such as cabin temperature sensors, lubricating oil temperature sensors, anti-icing temperature sensors, etc. in hydraulic and environmental control systems, and engine inlet temperature sensors, fuel and lubricating oil temperature sensors, etc. in power systems. By monitoring the temperature inside and outside the equipment, abnormal situations can be detected in time to avoid damage to personnel and equipment caused by too high or too low temperature, which affects the flight safety of the aircraft. Therefore, there is a need to equip temperature sensors at the front end of relevant aircraft control systems / devices.

[0003] At present, the dynamic characteristics of domestic airborne temperature sensors are mostly in the range of 5 - 12 s, and they cannot accurately respond in time to changes in environmental / medium temperature, such as engine inlet temperature, fuel and lubricating oil temperature, etc., which affects the real-time control of the engine and further affects the performance of the engine. Summary of the Invention

[0004] The purpose of the invention is to overcome the above-mentioned shortcomings of the prior art and provide a semi-armored temperature sensor with fast response, which can greatly improve the dynamic response characteristics of the sensor without reducing the environmental adaptability of the sensor, and enhance the real-time performance of the control system / device.

[0005] To achieve the above purpose, the invention adopts the following technical solutions: A semi-armored temperature sensor with fast response, comprising a shell and a temperature-sensitive element; The shell has a cavity, and at least one axial window is provided on the front pipe section of the shell; The temperature-sensitive element is arranged in the cavity of the front pipe section of the shell. An encapsulation is sleeved outside the temperature-sensitive element, and a plurality of axial ridges are arranged on the outer wall of the encapsulation. The ridges on the outer encapsulation of the temperature-sensitive element are in contact with the inner wall of the front pipe section of the shell, and at least a part of the temperature-sensitive element is exposed outside the shell through the window.

[0006] Preferably, the encapsulation material is ceramic.

[0007] Preferably, the shell is of an integral all-metal structure or a split metal welded structure.

[0008] Preferably, the temperature-sensitive element is a platinum resistor.

[0009] Preferably, a hexagon is connected to the middle of the shell. The hexagon is sleeved on the outer wall of the shell, and an external thread is provided on the shell below the hexagon.

[0010] Preferably, the window opening is a groove or a hole.

[0011] Preferably, the window opening is a plurality of axial long holes provided on the front pipe section of the shell.

[0012] Preferably, the convex ribs on the outer package of the temperature-sensitive element are arranged staggeredly with the axial long holes on the front pipe section of the shell.

[0013] Preferably, the gap at the contact between the inner wall of the front pipe section of the shell and the convex ribs on the outer package of the temperature-sensitive element is filled with sealant, and both ends of the temperature-sensitive element and the shell are filled and sealed with sealant.

[0014] Preferably, an electrical connector is provided at the rear end of the shell, and the electrical connector is electrically connected to the lead of the temperature-sensitive element.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, at least one window opening is machined on the part of the front pipe section of the sensor shell that contacts the measured medium, realizing semi-armored packaging, providing necessary support and protection for the temperature-sensitive element, and exposing part of the temperature-sensitive element to the measured environment. The measured medium can directly contact the outer package of the temperature-sensitive element, and heat is directly transferred between the medium, the outer package, and the temperature-sensitive element, without other intermediate heat conduction links, greatly improving the response speed of the sensor.

[0016] Furthermore, filling and bonding with sealant for protection ensures that the environmental adaptability of the sensor is not affected. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the fast-response semi-armored temperature sensor of the present invention; Figure 2 is a bottom view sectional view of the front pipe section of the shell of the present invention; Figure 3 is a schematic diagram of the ceramic-encapsulated temperature-sensitive element with convex ribs of the present invention; Figure 4 is a working principle block diagram of the temperature sensor of the present invention.

[0018] Wherein: 1 - temperature-sensitive element; 2 - shell; 3 - sealant; 4 - electrical connector. Detailed 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 denote 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 limiting the present invention.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, 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 of" 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 those of ordinary skill in the technical field to which the present invention belongs. The terms "mounted", "connected", "coupled" 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 it may be the internal communication of two elements or the interaction relationship between two elements. 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 the present invention can be understood according to specific circumstances. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0022] In the present 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 that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means 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 the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present 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, the present 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 Figures 1 to 2 shown, this embodiment provides a fast-response semi-armored temperature sensor and method, which makes a fast response to the temperature change of the measured medium and provides a feedback signal.

[0025] A fast-response semi-armored temperature sensor described in this embodiment includes a tube shell 2, a temperature-sensitive element 1, a sealant 3, and an electrical connector 4.

[0026] The tube shell 2 is a cylindrical structure with a cavity. The tube shell 2 is an integral all-metal structure or a split metal welded structure. The rear end of the tube shell 2 is connected to the electrical connector 4. The front end of the tube shell 2 is provided with a plurality of axial long holes. The front end of the tube shell 2 is used to place the temperature-sensitive element 1 with encapsulation. A hexagon is integrally connected to the middle of the tube shell 2. The hexagon is sleeved on the outer wall of the tube shell 2. The tube shell 2 is provided with an external thread below the hexagon. When in use, the front end of the tube shell 2 is inserted into the connecting pipeline to be measured, and the hexagon is rotated by a hexagon wrench to drive the external thread on the tube shell 2 to be threadedly connected with the connecting pipeline.

[0027] As Figure 3 shown, the temperature-sensitive element 1 is a platinum resistor encapsulated with high thermal conductivity ceramics such as silicon nitride or aluminum nitride, etc., and is in a rod shape. The outside of the temperature-sensitive element 1 is completely wrapped with encapsulation. In this embodiment, the encapsulation material is ceramics, and a plurality of axial ridges are provided on the outer wall of the ceramic encapsulation.

[0028] The temperature sensitive element 1 is assembled in the front end cavity of the tube shell 2; the convex ridges of the external package of the temperature sensitive element 1 are alternately arranged with the long strip holes of the front end tube section of the tube shell 2, the convex ridges of the external package of the temperature sensitive element 1 correspond to the inner wall position of the front end tube section of the tube shell 2, and the convex ridges of the external package of the temperature sensitive element 1 are transitionally matched with the inner wall of the front end tube section of the tube shell 2; the gap between the convex ridges of the external package of the temperature sensitive element 1 and the inner wall of the front end tube section of the tube shell 2 is filled with sealant 3, and the gap between the two ends of the temperature sensitive element 1 (i.e., the bottom end of the arc of the temperature sensitive element 1 and the top end of the lead) and the inner wall of the tube shell 2 is also filled with sealant 3 to isolate the measured medium from entering the internal cavity at the rear end of the tube shell 2, and at the same time play a role in fixing the temperature sensitive element 1; the temperature sensitive element 1 has its own lead connected to the electrical connector 4, and the electrical connector 4 is fixed to the tube shell 2 by welding or the like.

[0029] At least one long hole is processed in the front end tube section of the tube shell 2 in contact with the measured medium to achieve semi-armored packaging, so that the temperature sensitive element 1 is partially exposed to the measured environment, the measured medium and the external packaging of the temperature sensitive element 1 can be in direct contact, and the heat is directly transferred between the medium and the external packaging and the temperature sensitive element 1 without other intermediate heat conduction links, thereby greatly improving the response speed of the sensor.

[0030] The semi-armored structure design provides necessary support and protection for the temperature sensitive element 1, and is filled and bonded with a sealant 3 to ensure that the environmental adaptability of the sensor is not affected.

[0031] The semi-armored structure design can reduce the difficulty of the sensor packaging process and improve the packaging efficiency.

[0032] The semi-armored structure design allows the measured medium to be in direct contact with the external package of the temperature sensitive element 1 without any other intermediate heat conduction links, making the temperature detection more accurate.

[0033] The fast response semi-armored temperature sensor uses the characteristic that the resistance value of the temperature sensitive element 1 changes with temperature, and indirectly measures the temperature by measuring its resistance change. The temperature sensitive element 1 senses the temperature change of the measured medium, and its own resistance value changes. The corresponding temperature is obtained through the back-end circuit acquisition and conversion. The block diagram of the sensor working principle is shown in Figure 4 .

[0034] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0035] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0036] 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.

[0037] 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 they can be 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.

[0038] 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.

[0039] It should be understood that the above description is for illustrative purposes and not for limitation. 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 by the above description, but should be determined by 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. Omitting any aspect of the subject matter disclosed herein in the foregoing claims is not intended to abandon that subject matter, nor should the applicant be considered not to have considered that subject matter as part of the disclosed inventive subject matter.

Claims

1. A semi-armored temperature sensor with rapid response, characterized in that, It includes a shell (2) and a temperature-sensitive element (1); The shell (2) has a cavity, and at least one axial window is provided on the front pipe section of the shell (2); The temperature-sensitive element (1) is arranged in the cavity of the front pipe section of the shell (2). An encapsulation is sleeved outside the temperature-sensitive element (1). A plurality of axial ridges are provided on the outer wall of the encapsulation. The ridges on the outer encapsulation of the temperature-sensitive element (1) are in contact with the inner wall of the front pipe section of the shell (2). At least a part of the temperature-sensitive element (1) is exposed outside the shell (2) through the window.

2. The quickly responsive semi-armored temperature sensor according to claim 1, characterized in that, The encapsulation material is ceramic.

3. The fast-response semi-armored temperature sensor according to claim 1, characterized in that, The shell (2) is of an integral all-metal structure or a split metal welded structure.

4. The quickly-responsive semi-armored temperature sensor according to claim 1, wherein, The temperature-sensitive element (1) uses a platinum resistance.

5. The fast-response semi-armored temperature sensor according to claim 1, characterized in that, A hexagon is connected to the middle of the shell (2). The hexagon is sleeved on the outer wall of the shell (2). An external thread is provided on the shell (2) below the hexagon.

6. The quickly responsive semi-armored temperature sensor according to claim 1, characterized in that, The window is a groove or a hole.

7. The quickly-responsive semi-armored temperature sensor according to claim 6, characterized in that, The window is a plurality of axial long holes provided on the front pipe section of the shell (2).

8. The quickly responsive semi-armored temperature sensor according to claim 7, characterized in that, The ridges on the outer encapsulation of the temperature-sensitive element (1) are arranged staggeredly with the axial long holes of the front pipe section of the shell (2).

9. The quickly responsive semi-armored temperature sensor according to claim 1, wherein The gap at the contact between the inner wall of the front pipe section of the shell (2) and the ridges on the outer encapsulation of the temperature-sensitive element (1) is filled with a sealant (3). The two ends of the temperature-sensitive element (1) and the shell (2) are filled and sealed with the sealant (3).

10. The fast-response semi-armored temperature sensor according to claim 1, characterized in that, An electrical connector (4) is provided at the rear end of the shell (2). The electrical connector (4) is electrically connected to the lead of the temperature-sensitive element (1).

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