Gas pressure detection device

Abstract

The utility model provides a gas pressure detection device, and a pressure transmitter comprises a gas pressure detection main body part which is cylindrical; the periphery of the bottom surface of the gas pressure detection main body part is hermetically and fixedly connected with the periphery of the top surface of the circular elastic sheet through a connecting piece; the pressure reference cavity is formed between the bottom surface of the gas pressure detection main body part and the top surface of the circular elastic sheet in a sealing manner; a first electrode layer covers the upper side surface of the elastic membrane component, and a first auxiliary electrode layer and a second electrode layer cover the lower side surface of the gas pressure detection device main body at intervals; the first electrode layer, the first auxiliary electrode layer and the second electrode layer are electrically connected to a first capacitance detection unit through wires, the first capacitance detection unit is electrically connected to a first control unit, and the first control unit is in communication connection with a server. The gas pressure detection device is simple in structure, small in size and sensitive in reaction.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, and particularly relates to a gas pressure detection device. Background Art

[0002] A gas pressure detection device is composed of a pressure measuring element sensing unit, a measuring circuit and a process connecting piece. It can convert physical pressure parameters such as gas and liquid sensed by the pressure measuring element sensing unit into standard electrical signals to supply secondary instruments such as indicating alarm instruments, recorders, and regulators for measurement, indication, and process adjustment. However, the gas pressure detection devices sold on the market currently have a complex structure and poor sensitivity.

[0003] Therefore, it is urgent to propose a gas pressure detection device to solve the technical problems existing in the prior art. Content of the Utility Model

[0004] Aiming at the technical problems of the complex structure and poor sensitivity of the gas pressure detection device in the prior art, the utility model proposes a gas pressure detection device.

[0005] In a preferred embodiment of the utility model, a gas pressure detection device is provided, and the gas pressure detection device includes:

[0006] A gas pressure detection main body part, and the gas pressure detection main body part is cylindrical;

[0007] A circular elastic thin sheet, the outer periphery of the bottom surface of the gas pressure detection main body part is hermetically and fixedly connected to the outer periphery of the top surface of the circular elastic thin sheet through a connecting piece, and the orthographic projection of the outer periphery of the bottom surface of the gas pressure detection main body part and the outer periphery of the top surface of the circular elastic thin sheet overlaps;

[0008] A pressure reference cavity, and the pressure reference cavity is hermetically formed between the bottom surface of the gas pressure detection main body part and the top surface of the circular elastic thin sheet;

[0009] Wherein,

[0010] The top surface of the circular elastic thin sheet is covered with a first electrode layer, the bottom surface of the gas pressure detection main body part is covered with a first auxiliary electrode layer and a second electrode layer located in the pressure reference cavity. The first auxiliary electrode layer is located in the middle of the bottom surface of the gas pressure detection main body part, the second electrode layer is located on the bottom surface of the gas pressure detection main body part and close to the inner side of the connecting piece. The second electrode layer is circular and arranged at intervals on the outer periphery of the first auxiliary electrode layer. The first auxiliary electrode layer and the second electrode layer are respectively arranged opposite to the first electrode layer; the first electrode layer, the first auxiliary electrode layer and the second electrode layer are respectively electrically connected to a first capacitance detection unit through wiring, the first capacitance detection unit is electrically connected to a first control unit, and the first control unit is communicatively connected to a server.

[0011] Preferably, the gas pressure detection main body and the circular elastic sheet are made of electrically insulating materials.

[0012] Preferably, the first electrode layer, the first auxiliary electrode layer, and the second electrode layer are respectively metal coating layers.

[0013] Preferably, the first electrode layer and the first auxiliary electrode layer form a detection capacitor, and the first electrode layer and the second electrode layer form a reference capacitor.

[0014] Preferably, a reference pressure is formed in the pressure reference cavity, and the pressure to be detected can be applied to the bottom surface of the circular elastic sheet.

[0015] Preferably, an additional dielectric can be arranged in the pressure reference cavity to increase the sensitivity of the gas pressure detection device.

[0016] Preferably, the distance between the lower side surface of the main body of the pressure detection device in the pressure reference cavity and the upper side surface of the circular elastic sheet is 0.02 mm to 0.04 mm.

[0017] Preferably, the thickness of the circular elastic sheet is 0.4 mm to 1.8 mm.

[0018] Preferably, the first capacitance detection unit can process and convert the detected values of the detection capacitor and the reference capacitor into corresponding pressure values.

[0019] Preferably, the first control unit can switch the working mode of the pressure detection device between the detection mode and the calibration mode.

[0020] Compared with the prior art, the present utility model can obtain the following beneficial effects:

[0021] A gas pressure detection device of the present application has a simple structure, a small volume, and is sensitive in reaction, and can be applied to gas pressure detection in multiple scenarios. Description of the Drawings

[0022] The following will further illustrate the above-mentioned characteristics, technical features, advantages and their implementation manners in a clear and understandable manner in combination with the drawings in the preferred embodiments.

[0023] Figure 1 A gas pressure detection device in an embodiment of the present utility model is shown.

[0024] Figure 2 A bottom view of the gas pressure detection main body of a gas pressure detection device in an embodiment of the present utility model is shown. Detailed Embodiments

[0025] The following further details each aspect of the present utility model.

[0026] Unless otherwise defined or stated, all professional and scientific terms used herein have the same meaning as those familiar to persons skilled in the art. In addition, any methods and materials similar or equivalent to those described may be applied to the method of the present utility model.

[0027] Unless otherwise clearly specified and limited, the "or" described in the present utility model includes the relationship of "and". The "and" is equivalent to the Boolean logic operator "AND", the "or" is equivalent to the Boolean logic operator "OR", and "AND" is a subset of "OR".

[0028] It can be understood that although terms such as "first", "second", etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Therefore, the first element may be referred to as the second element without departing from the teachings of the concept of the present utility model.

[0029] In the present utility model, the terms "consisting essentially of..." and "consisting of..." are included in the terms "containing", "comprising" or "including".

[0030] Unless otherwise clearly specified and limited, the terms "connected", "communicated with", "connected to" of the present utility model should be understood in a broad sense. For example, it may be a fixed connection, or may be connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0031] For example, if an element (or component) is referred to as being on another element, coupled with another element or connected to another element, then the said one element may be directly formed on, coupled with or connected to the said another element, or there may be one or more intermediate elements between them. On the contrary, if the expressions "directly on...", "directly coupled with..." and "directly connected to..." are used herein, it means that there are no intermediate elements. Other words used to illustrate the relationship between elements should be interpreted similarly, such as "between..." and "directly between...", "attached" and "directly attached", "adjacent" and "directly adjacent", etc.

[0032] In addition, it should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the accompanying drawings. The terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component. It can be understood that here, these terms are used to describe the relationship of one element, layer or region relative to another element, layer or region as shown in the accompanying drawings. In addition to the orientations described in the accompanying drawings, these terms should also include other orientations of the device.

[0033] Other aspects of the present utility model will be obvious to those skilled in the art due to the disclosure herein.

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the specific implementation manners of the present utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings, and other implementation manners can also be obtained.

[0035] It should also be noted that the illustrations provided in the following embodiments only schematically illustrate the basic concept of the present application. The drawings only show the components related to the present application, rather than being drawn according to the number, shape and size of the components in actual implementation. The type, quantity and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex. For example, the thickness of the elements in the accompanying drawings may be exaggerated for clarity.

[0036] Embodiment

[0037] As shown in the Figure 1-2 accompanying drawings, the present utility model realizes a gas pressure detection device, and the gas pressure detection device includes:

[0038] A gas pressure detection main body 1, and the gas pressure detection main body 1 is cylindrical;

[0039] A circular elastic thin sheet 2, the outer periphery of the bottom surface of the gas pressure detection main body 1 is hermetically and fixedly connected to the outer periphery of the top surface of the circular elastic thin sheet 2 through a connecting member 11, and the orthographic projection of the outer periphery of the bottom surface of the gas pressure detection main body 1 and the outer periphery of the top surface of the circular elastic thin sheet 2 overlaps;

[0040] A pressure reference cavity 10, and the pressure reference cavity 10 is hermetically formed between the bottom surface of the gas pressure detection main body 1 and the top surface of the circular elastic thin sheet 2;

[0041] Wherein,

[0042] The top surface of the circular elastic sheet 2 is covered with a first electrode layer 3, and the bottom surface of the gas pressure detection main body 1 is covered with a first auxiliary electrode layer 5 and a second electrode layer 4 located in the pressure reference cavity 10. The first auxiliary electrode layer 5 is located in the middle of the bottom surface of the gas pressure detection main body 1, and the second electrode layer 4 is located on the bottom surface of the gas pressure detection main body 1 and close to the inner side of the connecting member 11. The second electrode layer 4 is circular and arranged at intervals on the outer periphery of the first auxiliary electrode layer 5. The first auxiliary electrode layer 5 and the second electrode layer 4 are respectively arranged opposite to the first electrode layer 3. The first electrode layer 3, the first auxiliary electrode layer 5, and the second electrode layer 4 are respectively electrically connected to the first capacitance detection unit 7 through wires. The first capacitance detection unit 7 is electrically connected to the first control unit 8, and the first control unit 8 is communicatively connected to the server 9.

[0043] It should be noted that the pressure reference cavity 10 can be set to a vacuum environment or an environment with gas to provide a reference pressure. The gas pressure P0 of the environment to be detected can be applied to the bottom surface of the circular elastic sheet 2. When the gas pressure P0 of the environment to be detected is greater than the reference pressure, the circular elastic sheet 2 deflects towards the inner side of the pressure reference cavity 10.

[0044] It should be noted that for the convenience of implementing the detection operation of the environmental gas pressure, the gas pressure detection device can be installed in a shell-like component, and the environmental pressure P0 to be detected is applied to the circular elastic sheet 2 through a drainage channel.

[0045] As a preferred embodiment, the gas pressure detection main body 1 and the circular elastic sheet 2 are made of electrically insulating materials.

[0046] As a preferred embodiment, the first electrode layer 3, the first auxiliary electrode layer 5, and the second electrode layer 4 are respectively metal coating layers.

[0047] As a preferred embodiment, the first electrode layer 3 and the first auxiliary electrode layer 5 form a detection capacitor, and the first electrode layer 3 and the second electrode layer 4 form a reference capacitor.

[0048] It should be noted that the second electrode layer 4 is located on the bottom surface of the gas pressure detection main body 1 and close to the inner side of the connecting member 11, so that the reference capacitor is less likely to be affected by the gas pressure P0 of the environment to be detected, and its value is more stable. Furthermore, it can be judged whether the detection capacitance value is mismeasured.

[0049] As a preferred embodiment, a reference pressure is formed in the pressure reference cavity 10, and the pressure to be detected can be applied to the bottom surface of the circular elastic sheet 2.

[0050] As a preferred embodiment, an additional dielectric can be provided in the pressure reference cavity 10 to increase the sensitivity of the gas pressure detection device.

[0051] As a preferred embodiment, the distance between the lower side of the main body 1 of the pressure detection device in the pressure reference chamber 10 and the upper side of the circular elastic sheet 2 is 0.02 mm to 0.04 mm.

[0052] It should be noted that setting the height value of the pressure reference chamber 10 to 0.02 mm to 0.04 mm can miniaturize the gas pressure detection device and at the same time maintain higher detection sensitivity.

[0053] As a preferred embodiment, the thickness of the circular elastic sheet 2 is 0.4 mm to 1.8 mm.

[0054] It should be noted that when the thickness of the circular elastic sheet 2 is 0.4 mm to 1.8 mm, when the ambient pressure is applied, the circular elastic sheet 2 can give timely deformation feedback. In addition, when the ambient gas pressure is loaded too much, it will cause irreversible deformation of the circular elastic sheet 2 and damage the circular elastic sheet 2.

[0055] It should be noted that when the displacement generated by the deformation of the circular elastic sheet 2 is between 0.01 μm and 1 mm, the detection accuracy of the gas pressure detection device is optimal.

[0056] As a preferred embodiment, the first capacitance detection unit 7 can process and convert the detected detection capacitance and the reference capacitance values into corresponding pressure values.

[0057] As a preferred embodiment, the first control unit 8 can switch the working mode of the pressure detection device between the detection mode and the calibration mode.

[0058] It should be noted that the calibration mode can be used to diagnose whether there is a fault in the gas pressure detection device.

[0059] Based on the present application, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects described herein can be used to implement the device and / or practice the method. In addition, this device can be implemented and this method can be practiced using other structures and / or functions in addition to one or more of the aspects described herein.

[0060] It should be noted that the above embodiments can be freely combined as needed. The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

[0061] All documents mentioned in this utility model are incorporated herein by reference as if each individual document was specifically and individually incorporated by reference. In addition, it should be understood that after reading the above content of this utility model, those skilled in the art can make various changes or modifications to this utility model, and these equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. A gas pressure detection device, characterized in that, The gas pressure detection device includes: A gas pressure detection main body part, and the gas pressure detection main body part is cylindrical; A circular elastic thin sheet, the outer periphery of the bottom surface of the gas pressure detection main body part is hermetically and fixedly connected to the outer periphery of the top surface of the circular elastic thin sheet through a connecting piece, and the orthographic projection of the outer periphery of the bottom surface of the gas pressure detection main body part and the outer periphery of the top surface of the circular elastic thin sheet overlaps; A pressure reference cavity, and the pressure reference cavity is hermetically formed between the bottom surface of the gas pressure detection main body part and the top surface of the circular elastic thin sheet; Wherein, A first electrode layer is covered on the top surface of the circular elastic thin sheet, a first auxiliary electrode layer and a second electrode layer located in the pressure reference cavity are covered on the bottom surface of the gas pressure detection main body part, the first auxiliary electrode layer is located in the middle of the bottom surface of the gas pressure detection main body part, the second electrode layer is located on the bottom surface of the gas pressure detection main body part and close to the inner side of the connecting piece, the second electrode layer is circular and arranged at intervals on the outer periphery of the first auxiliary electrode layer, and the first auxiliary electrode layer and the second electrode layer are respectively arranged opposite to the first electrode layer; the first electrode layer, the first auxiliary electrode layer and the second electrode layer are respectively electrically connected to a first capacitance detection unit through wires, the first capacitance detection unit is electrically connected to a first control unit, and the first control unit is communicatively connected to a server.

2. The gas pressure detection device according to claim 1, characterized in that The gas pressure detection main body part and the circular elastic thin sheet are made of electrically insulating materials, and the first electrode layer, the first auxiliary electrode layer and the second electrode layer are respectively metal coating layers.

3. A gas pressure detection device according to claim 2, characterized in that, A detection capacitance is formed between the first electrode layer and the first auxiliary electrode layer, and a reference capacitance is formed between the first electrode layer and the second electrode layer.

4. The gas pressure detection device according to claim 3, characterized in that, A reference pressure is formed in the pressure reference cavity, and a pressure to be detected can be applied to the bottom surface of the circular elastic thin sheet.

5. A gas pressure detection device according to claim 4, characterized in that, The distance between the lower side surface of the main body of the pressure detection device and the upper side surface of the circular elastic thin sheet in the pressure reference cavity is 0.02 mm to 0.04 mm.

6. A gas pressure detection device according to claim 5, characterized in that, The thickness of the circular elastic thin sheet is 0.4 mm to 1.8 mm.

7. A gas pressure detection device according to claim 6, characterized in that, The first capacitance detection unit can process and convert the detected detection capacitance and reference capacitance values into corresponding pressure values.

8. The gas pressure detection device according to claim 7, characterized in that, The first control unit can switch the working mode of the pressure detection device between a detection mode and a calibration mode.

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