Photoelectric integrated pressure sensor for electromagnetic radiation environment

Abstract

The utility model discloses a photoelectric integrated pressure sensor for an electromagnetic radiation environment, relates to the technical field of pressure sensors, and can solve the problem that a conventional pressure sensor does not have a verification function. The photoelectric integrated pressure sensor for the electromagnetic radiation environment comprises a sensor main body, an electric signal acquisition assembly and an optical signal acquisition assembly, wherein the electric signal acquisition assembly and the optical signal acquisition assembly are used for acquiring electric signals and optical signals according to pressure changes; and the electric signal acquisition assembly and the optical signal acquisition assembly are both fixed in the sensor main body.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure sensors, in particular to a photoelectric integrated pressure sensor used in an electromagnetic radiation environment. Background Art

[0002] At present, the common pressure sensors on the market are generally resistive pressure sensors that use resistance changes to measure pressure. Resistive pressure sensors are based on the piezoresistive effect. When pressure acts on the sensitive element of the sensor, the sensitive element will deform, causing the resistance strain gauge to produce a resistance change, which is then converted into an electrical signal output to achieve pressure measurement. It has a simple structure and is easy to measure.

[0003] However, in some special equipment pressure test scenarios, such as high temperature and high pressure after the equipment is running, electromagnetic and radiation source locations, traditional resistive pressure sensors may cause signal loss or signal instability after receiving external interference, resulting in failure of signal data transmission. Therefore, it is necessary to consider using sensors that are not affected by external interference, such as fiber optic pressure sensors with strong anti-interference capabilities. However, it is difficult to determine the accuracy of pressure measurement data when using fiber optic pressure sensors alone to measure pressure data, and it is necessary to perform separate calibration or data verification when the equipment is shut down or overhauled. However, existing fiber optic pressure sensors do not have verification functions.

[0004] Based on the above background, the inventor has designed a photoelectric integrated pressure sensor for use in an electromagnetic radiation environment to solve the above problems, and thus proposed the present application. Utility Model Content

[0005] The purpose of the present application is to provide a photoelectric integrated pressure sensor for use in an electromagnetic radiation environment, so as to solve the problem that the existing traditional pressure sensors do not have a verification function.

[0006] In order to solve the above technical problems, the utility model adopts the following solutions:

[0007] The present application provides a photoelectric integrated pressure sensor for use in an electromagnetic radiation environment, comprising a sensor body, and an electrical signal acquisition component and an optical signal acquisition component for acquiring electrical signals and optical signals according to pressure changes;

[0008] The electrical signal acquisition component and the optical signal acquisition component are both fixed in the sensor body.

[0009] Optionally, a force-bearing boss protruding upward is provided in the central area of ​​the top of the sensor body.

[0010] Optionally, the cross-sectional shape of the force-bearing boss is circular, and an annular groove is provided on its circumference.

[0011] Optionally, the bottom of the sensor body is provided with a mounting cavity located directly below the force-bearing boss;

[0012] The electrical signal acquisition component and the optical signal acquisition component are both arranged in the installation cavity.

[0013] Optionally, the electrical signal acquisition component includes a strain gauge fixedly connected to the top of the installation cavity.

[0014] Optionally, the strain gauge is in the shape of a cross or a circle;

[0015] A through hole is provided at the center of the strain gauge for the signal collection end of the optical signal collection component to pass through.

[0016] Optionally, the optical signal acquisition assembly includes an optical fiber matrix beam in the installation cavity, and a protruding structure arranged in the middle of the optical fiber matrix beam;

[0017] A FP cavity is arranged on the top of the protruding structure, and the top surface of the FP cavity is arranged to abut or closely contact the top of the installation cavity.

[0018] Optionally, the optical signal acquisition component includes a fiber matrix beam in the installation cavity, and a fiber grating structure arranged in the middle of the fiber matrix beam, and a FP cavity is arranged on the top of the fiber grating structure.

[0019] Optionally, the top structure of the installation cavity is a sunken force transmission boss;

[0020] The bottom surface of the force transmission boss includes a force transmission bottom surface located at the center of the bottom and a force transmission cone surface located at the peripheral side of the force transmission bottom surface;

[0021] The signal collection end of the electric signal collection component is fixed on the force transmission cone surface;

[0022] The signal collection end of the optical signal collection component abuts against or is in close contact with the force transmission bottom surface.

[0023] Optionally, the installation cavity is an open structure;

[0024] Also included is a cover for closing the open mounting cavity, the cover being fixedly connected to the bottom of the sensor body;

[0025] The sensor body is also provided with a cable channel, one end of which is connected to the installation cavity;

[0026] It also includes a signal line connector, which is installed on one end of the cable channel away from the installation cavity. The electrical signal acquisition component and the optical signal acquisition component are both connected to the signal line connector through the cable channel.

[0027] Beneficial effects of the utility model:

[0028] The present application simultaneously arranges an electrical signal acquisition component and an optical signal acquisition component in the sensor body, so that the present application has the performance of resisting electromagnetic and atomic radiation interference. When the sensor body measures pressure, the detection method can be selected according to the real-time environmental conditions of the location of the sensor body. In the complex environment of high temperature and electromagnetic radiation area, only the pressure value measured by the optical signal acquisition component can be used. After shutdown and the high temperature and electromagnetic radiation area is closed, the pressure value collected by the electrical signal acquisition component can be used to verify the pressure value collected by the electrical signal acquisition component, which effectively solves the problem that the existing traditional optical fiber pressure sensor does not have a verification function. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present application.

[0030] Figure 2 It is a schematic diagram of the cross-sectional structure of an embodiment of the present application.

[0031] Figure 3 It is a bottom view structural schematic diagram of an embodiment of the present application.

[0032] Figure 4 It is a schematic diagram of the three-dimensional structure from another viewing angle of the embodiment of the present application.

[0033] Figure 5 This is a schematic diagram of the three-dimensional structure of the embodiment of the present application after removing the optical signal collection component.

[0034] Description of reference numerals:

[0035] 1-sensor body, 11-force bearing boss, 12-annular groove, 13-installation cavity, 14-cable channel, 15-force transmission boss, 151-force transmission cone surface, 152-force transmission bottom surface, 2-signal line connector, 3-optical fiber matrix beam, 31-protruding structure, 311-FP cavity, 32-optical fiber body, 4-strain gauge, 41-through hole, 5-cover. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0037] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0038] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "open", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0040] like Figures 1 to 5 As shown, this embodiment provides a photoelectric integrated pressure sensor for use in an electromagnetic radiation environment, comprising a sensor body 1, and an electrical signal acquisition component and an optical signal acquisition component for acquiring electrical signals and optical signals according to pressure changes;

[0041] The electrical signal acquisition component and the optical signal acquisition component are both fixed in the sensor body 1 .

[0042] This embodiment simultaneously sets an electrical signal acquisition component and an optical signal acquisition component in the sensor body 1, so that the present application has the performance of resisting electromagnetic and atomic radiation interference. When the sensor body 1 measures the pressure, the detection method can be selected according to the real-time environmental conditions of the location of the sensor body 1. In the complex environment of high temperature and electromagnetic radiation area, only the pressure value measured by the optical signal acquisition component can be used. After shutdown and the high temperature and electromagnetic radiation area is closed, the pressure value collected by the electrical signal acquisition component can be used to verify the pressure value collected by the electrical signal acquisition component, which effectively solves the problem that the existing traditional optical fiber pressure sensor does not have a verification function.

[0043] Specifically, in this embodiment, Figure 1 and Figure 2As shown, a force-bearing boss 11 protruding upward is provided in the central area of ​​the top of the sensor body 1. The force-bearing boss 11 is located in the central area so that the sensor body 1 can better bear and transmit the axial pressure F.

[0044] Specifically, in this embodiment, Figure 1 and Figure 2 As shown, the cross-sectional shape of the force-bearing boss 11 is circular, and an annular groove 12 is arranged on its circumferential side. Under the action of the axial force F, the structure of the sensor body 1 will be deformed, mainly the force-bearing boss 11 will deform downward, and the deformation at the center is the largest. Therefore, the annular groove 12 can provide a certain transition space for the deformed force-bearing boss 11.

[0045] Specifically, in this embodiment, Figures 2 to 5 As shown, the bottom of the sensor body 1 is provided with a mounting cavity 13 located directly below the force-bearing boss 11;

[0046] The electrical signal collection component and the optical signal collection component are both arranged in the installation cavity 13, so that after the axial force F is applied to the force-bearing boss 11, the electrical signal collection component and the optical signal collection component can both collect signals according to the pressure change of the axial force F.

[0047] Specifically, in this embodiment, Figure 5 As shown, the electrical signal acquisition component includes a strain gauge 4 fixedly connected to the top of the installation cavity 13. In this embodiment, the strain gauge 4 is fixed to the top of the installation cavity 13 by bonding.

[0048] Specifically, in this embodiment, Figure 5 As shown, the shape of the strain gauge 4 is a cross or a circle;

[0049] The center of the strain gauge 4 is provided with a through hole 41 for the signal collection end of the optical signal collection component to pass through. In this embodiment, the strain gauge 4 is in the shape of a cross, and a through hole 41 is provided in the center thereof, so that the electrical signal collection component and the optical signal collection component can collect electrical signals and optical signals at the same time, and verify the pressure value measured by the optical signal collection component in real time. In some embodiments, technicians can also use a circular or other shaped strain gauge 4, which will not be described in detail here.

[0050] Specifically, in this embodiment, Figures 2 to 4 As shown, the optical signal acquisition assembly includes an optical fiber matrix beam 3 in the installation cavity 13, and a protruding structure 31 arranged in the middle of the optical fiber matrix beam 3;

[0051] A FP cavity 311 is arranged on the top of the protruding structure 31, and its top surface is arranged against or closely attached to the top of the installation cavity 13. In the present embodiment, the protruding structure 31 and the optical fiber matrix beam 3 are both made of conventional optical fiber materials. The FP cavity 311 arranged on the top of the protruding structure 31 has a height value of D0 when no axial force is borne; when the maximum force is borne, the height value of the FP cavity 311 is about D1. When the protruding structure 31 is within the elastic deformation range, the axial force F and the cavity height value D of the FP cavity 311 are in a linear relationship. Therefore, the axial force F can be obtained by solving the height value D of the FP cavity.

[0052] The FP cavity 311 in this embodiment is an existing cavity structure, which will not be described in detail here.

[0053] In some embodiments, the optical signal acquisition component includes a fiber matrix beam 3 in an installation cavity 13, and a fiber grating structure arranged in the middle of the fiber matrix beam 3. An FP cavity 311 is arranged on the top of the fiber grating structure. When the fiber grating structure is radially stretched, causing the spectral wavelength to change, it is fed back to the photoelectric demodulator for data processing, and the pressure value can also be obtained.

[0054] Specifically, in this embodiment, Figure 2 , Figure 3 and Figure 5 As shown, the top structure of the installation cavity 13 is a sunken force transmission boss 15;

[0055] The bottom surface of the force transmission boss 15 includes a force transmission bottom surface 152 located at the center of the bottom and a force transmission conical surface 151 located on the peripheral side of the force transmission bottom surface 152;

[0056] The signal collection end of the electrical signal collection component is fixed on the force transmission cone surface 151;

[0057] The signal collection end of the optical signal collection component abuts against or is in close contact with the force transmission bottom surface 152 .

[0058] In this embodiment, the top structure of the mounting cavity 13 is a sunken force transmission boss 15, and the force transmission boss 15 includes a force transmission bottom surface 152 and a force transmission conical surface 151, so that after the sensor body 1 is subjected to force, the force transmission conical surface 151 can push the strain gauge 4 to deform, and at the same time, the force transmission bottom surface 152 pushes the protruding structure 31 to deform, thereby driving the FP cavity to deform, so that electrical signals and optical signals can be collected at the same time.

[0059] Specifically, in this embodiment, Figure 2 As shown, the installation cavity 13 is an open structure;

[0060] It also includes a cover 5 for closing the open mounting cavity 13, and the cover 5 is fixedly connected to the bottom of the sensor body 1;

[0061] The sensor body 1 is further provided with a cable channel 14, one end of which is communicated with the installation cavity 13;

[0062] It also includes a signal line connector 2 , which is installed on one end of the cable channel 14 away from the installation cavity 13 , and both the electrical signal acquisition component and the optical signal acquisition component are connected to the signal line connector 2 through the cable channel 14 .

[0063] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A photoelectric integrated pressure sensor for use in an electromagnetic radiation environment, characterized in that: It comprises a sensor body (1), and an electrical signal acquisition component and an optical signal acquisition component for acquiring electrical signals and optical signals according to pressure changes; The electrical signal acquisition component and the optical signal acquisition component are both fixed in the sensor body (1).

2. The photoelectric integrated pressure sensor for use in an electromagnetic radiation environment according to claim 1, characterized in that: A force-bearing boss (11) protruding upward is provided in the central area of ​​the top of the sensor body (1).

3. The photoelectric integrated pressure sensor for use in an electromagnetic radiation environment according to claim 2, characterized in that: The cross-sectional shape of the force-bearing boss (11) is circular, and an annular groove (12) is provided on its circumference.

4. The photoelectric integrated pressure sensor for use in an electromagnetic radiation environment according to claim 1, characterized in that: The bottom of the sensor body (1) is provided with a mounting cavity (13) located directly below the force-bearing boss (11); The electrical signal collection component and the optical signal collection component are both arranged in the installation cavity (13).

5. The photoelectric integrated pressure sensor for use in an electromagnetic radiation environment according to claim 4, characterized in that: The electrical signal acquisition component comprises a strain gauge (4) fixedly connected to the top of the installation cavity (13).

6. The photoelectric integrated pressure sensor for use in an electromagnetic radiation environment according to claim 5, characterized in that: The strain gauge (4) is in the shape of a cross or a circle; A through hole (41) for the signal collection end of the optical signal collection component to pass through is provided at the center of the strain gauge (4).

7. The photoelectric integrated pressure sensor for use in an electromagnetic radiation environment according to claim 4, characterized in that: The optical signal collection component comprises an optical fiber matrix beam (3) in an installation cavity (13), and a protruding structure (31) arranged in the middle of the optical fiber matrix beam (3); The top of the protruding structure (31) is provided with an FP cavity (311), and the top surface of the FP cavity (311) is arranged to abut against or closely contact the top of the installation cavity (13).

8. The photoelectric integrated pressure sensor for use in an electromagnetic radiation environment according to claim 4, characterized in that: The optical signal acquisition component comprises an optical fiber matrix beam (3) in an installation cavity (13), and an optical fiber grating structure arranged in the middle of the optical fiber matrix beam (3), and an FP cavity (311) is arranged on the top of the optical fiber grating structure.

9. The photoelectric integrated pressure sensor for use in an electromagnetic radiation environment according to claim 4, characterized in that: The top structure of the installation cavity (13) is a sunken force transmission boss (15); The bottom surface of the force transmission boss (15) comprises a force transmission bottom surface (152) located at the center of the bottom and a force transmission conical surface (151) located on the peripheral side of the force transmission bottom surface (152); The signal collection end of the electric signal collection component is fixed on the force transmission cone surface (151); The signal collection end of the optical signal collection component abuts against or is in close contact with the force transmission bottom surface (152).

10. The photoelectric integrated pressure sensor for use in an electromagnetic radiation environment according to claim 4, characterized in that: The installation cavity (13) is an open structure; It also includes a cover (5) for closing the open mounting cavity (13), the cover (5) being fixedly connected to the bottom of the sensor body (1); A cable channel (14) is also provided in the sensor body (1), and one end of the cable channel (14) is in communication with the installation cavity (13); It also includes a signal line connector (2), which is installed on one end of the cable channel (14) away from the installation cavity (13), and the electrical signal collection component and the optical signal collection component are both connected to the signal line connector (2) through the cable channel (14).

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