CN216284037U - Self-resetting sensitization type pressure monitoring device based on fiber bragg grating - Google Patents
Self-resetting sensitization type pressure monitoring device based on fiber bragg grating Download PDFInfo
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- CN216284037U CN216284037U CN202123086119.XU CN202123086119U CN216284037U CN 216284037 U CN216284037 U CN 216284037U CN 202123086119 U CN202123086119 U CN 202123086119U CN 216284037 U CN216284037 U CN 216284037U
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Abstract
The utility model provides a self-resetting sensitization type sensing monitoring device based on fiber bragg gratings, which belongs to the technical field of pressure monitoring and comprises a main shell, a pressure bearing mechanism, a force transmission mechanism and a fiber bragg grating sensor. The pressure-bearing mechanism is arranged at the upper part of the main shell; the force transmission mechanism is arranged at the lower part of the main shell; the fiber grating sensor is arranged at the bottom of the main shell and generates wavelength change through pushing of the push rod. The self-resetting sensitization type pressure monitoring device based on the fiber bragg grating provided by the utility model can accurately detect the tiny pressure by using the wavelength change of the fiber bragg grating sensor, and can quickly sense the change of the pressure bearing value. The utility model has light structure, can amplify, monitor and analyze the tiny pressure, realizes the real-time monitoring and prediction of the tiny pressure, overcomes the problems of inaccurate detection of the tiny pressure and easy interference of an electromagnetic field in the prior art, and realizes the real-time detection of the tiny pressure.
Description
Technical Field
The utility model belongs to the technical field of sensing monitoring, and particularly relates to a self-resetting sensitivity-enhanced pressure monitoring device based on fiber bragg gratings.
Background
At present, the existing pressure gauges in the market are mainly classified into a vibrating wire type, a pneumatic type, a resistance strain type and a fiber grating type according to a sensing principle. The vibrating wire type soil pressure gauge, the pneumatic type soil pressure gauge and the resistance strain type soil pressure gauge all use electricity as sensing signals, and are difficult to be used in some flammable and explosive severe environments with strong electromagnetic interference and occasions needing remote detection. The fiber grating type pressure gauge is a novel fiber sensor which can form a sensing network system and has many advantages of the fiber sensor, wherein the most important is that the sensing signal of the fiber grating self-recovery micro pressure strain gauge is wavelength modulation. The sensing mechanism has the advantages that the measuring signal is not influenced by factors such as fluctuation of a light source, bending loss of an optical fiber, connection loss, aging of a detector and the like, the unclear phase measurement and the requirement on an inherent reference point in a common interference sensor are avoided, and the wavelength division multiplexing technology can be conveniently used.
However, the fiber grating sensor in the prior art is not sensitive enough, so that the micro pressure detection is not accurate and the change of the pressure bearing value cannot be sensed quickly.
SUMMERY OF THE UTILITY MODEL
The utility model provides a self-resetting sensitivity-enhancing type pressure monitoring device based on fiber bragg gratings, which solves the problems that the existing sensor cannot accurately detect the tiny pressure and cannot quickly sense the change of a pressure bearing value.
In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a but based on fiber grating from restoring to throne sensitization type pressure monitoring device includes:
a main housing;
the pressure-bearing mechanism is arranged at the upper part of the main shell and comprises an inertia block arranged in the main shell and a pressure-bearing plate arranged above the inertia block, and an elastic assembly is arranged between the inertia block and the pressure-bearing plate;
the force transmission mechanism is arranged at the lower part of the main shell and comprises a stress plate and a push rod, the stress plate is positioned below the inertia block to transmit the pressure of the inertia block, the push rod is connected below the stress plate, the lower end of the stress plate is provided with an elastic reset piece, and the elastic reset piece rebounds through itself to drive the push rod to reset by means of the stress plate;
the fiber grating sensor is arranged at the bottom of the main shell and generates wavelength change through pushing of the push rod.
In a possible implementation manner, the main housing is a cylindrical structure, the upper opening and the lower portion of the main housing are closed, the pressure-bearing mechanism is arranged at the upper opening end of the main housing, the force-transmission mechanism is arranged in the inner cavity of the main housing, and the fiber grating sensor is arranged at the closed end of the lower portion of the main housing.
In one possible implementation, the elastic component includes:
the lower end of the sleeve is fixedly arranged on the upper end face of the inertia block;
the sliding rod penetrates through the inner cavity of the sleeve from top to bottom and is arranged in a sliding manner along the axial direction of the sleeve, and the bearing plate is fixedly arranged at the upper end of the sliding rod;
the spring part is sleeved outside the sleeve, the upper end of the spring part is connected to the lower end face of the bearing plate, and the lower end of the spring part is connected to the upper end face of the inertia block.
In one possible implementation, the inertial mass is a metal piece.
In a possible realization mode, the push rod is vertically connected to the middle of the lower end face of the stress plate.
In a possible implementation manner, the elastic reset piece is a spring clamp, two arc-shaped elastic pieces are oppositely arranged on the upper side and the lower side of the spring clamp, and the push rod penetrates through the two arc-shaped elastic pieces.
In a possible implementation manner, a temperature compensation grating is arranged in the main housing, and the temperature compensation grating is connected with the fiber grating sensor in series.
The self-resetting sensitization type pressure monitoring device based on the fiber bragg grating has the beneficial effects that:
(1) the effect of uneven pressure deformation can be enabled to be even under the action of the elastic component and the inertia block in the transmission process, and the monitoring result is more stable and accurate.
(2) The pressure amplifying device can amplify pressure, reduce errors generated in the monitoring process and facilitate measurement and calculation.
(3) The self-recovery effect is achieved, labor is saved, and repeated measurement is facilitated.
(4) The fiber grating sensor can greatly improve the accuracy and the measurement interval response time during measurement, is more resistant to electromagnetic field interference compared with circuit measurement, and has good stability.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a self-resettable sensitivity-enhanced pressure monitoring device based on a fiber grating according to an embodiment of the present invention;
fig. 2 is a sectional view taken along a-a in fig. 1.
Description of reference numerals:
1. a main housing; 2. a pressure bearing plate; 3. a slide bar; 4. a sleeve; 5. a spring member; 6. an inertial mass; 7. a stress plate; 8. a push rod; 9. a spring clip; 10. a fiber grating sensor.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1 and fig. 2, a self-resettable sensitivity-enhanced pressure monitoring device based on fiber gratings according to the present invention will now be described.
The self-resetting sensitivity-enhanced pressure monitoring device based on the fiber bragg grating comprises a main shell 1, a pressure-bearing mechanism, a force transmission mechanism and a fiber bragg grating sensor 10.
The pressure-bearing mechanism is arranged at the upper part of the main shell 1, the pressure-bearing mechanism comprises an inertia block 6 arranged in the main shell 1 and a pressure-bearing plate 2 arranged above the inertia block 6, and an elastic component is arranged between the inertia block 6 and the pressure-bearing plate 2; the force transmission mechanism is arranged at the lower part of the main shell 1 and comprises a stress plate 7 and a push rod 8, the stress plate 7 is positioned below the inertia block 6 to transmit the pressure of the inertia block 6, the push rod 8 is connected below the stress plate 7, the lower end of the stress plate 7 is provided with an elastic reset piece, and the elastic reset piece rebounds through itself to drive the push rod 8 to reset by means of the stress plate 7; the fiber grating sensor 10 is arranged at the bottom of the main shell 1, and the fiber grating sensor 10 generates wavelength change through pushing of the push rod 8.
Compared with the prior art, the self-resetting sensitization type pressure monitoring device based on the fiber bragg grating has the advantages that a force application object applies downward pressure to the bearing plate 2, the pressure is transmitted to the inertia block 6 through the elastic component, the inertia block 6 applies uniform pressure to the stress plate 7 below, the stress plate 7 drives the push rod 8 to apply the pressure downward and acts on the fiber bragg grating sensor 10, the fiber bragg grating sensor is stressed and deformed to generate wavelength change, and finally the pressure value is accurately measured and calculated through the wavelength change. After the pressure is released, the elastic reset piece upwards pushes the stress plate 7 through self resilience to drive the push rod 8 to stop acting on the fiber grating sensor 10, so that the effect of automatic reset in a short time is achieved, and the purpose of monitoring the micro pressure in real time is achieved. The self-resetting sensitization type pressure monitoring device based on the fiber bragg grating provided by the utility model can accurately detect the tiny pressure by using the wavelength change of the fiber bragg grating sensor 10, and can quickly sense the change of the pressure bearing value.
The main housing 1 has a cylindrical structure with an open upper portion and a closed lower portion, and has a cavity therein. The main housing 1 is used for enclosing parts and components, and is subject to pressure deformation, and is generally made of rigid materials.
The inner cavity of the main shell 1 is respectively provided with an inertia block 6 and a stress plate 7 in a sliding way, and the inertia block 6 is positioned above the stress plate 7. The pressure-bearing plate 2 is a main part for transmitting pressure, and is generally made of pressure-sensitive material and plastic material, and is used for receiving and transmitting pressure.
Specifically, elastic component includes sleeve 4, slide bar 3 and spring part 5, and the lower extreme vertical welding of sleeve 4 is at the up end of inertia piece 6, and slide bar 3 is worn to locate in sleeve 4 and slidable sets up along the axial, and the upper end of slide bar 3 is connected on bearing plate 2, and the outside cover of sleeve 4 is equipped with spring part 5, and the lower terminal surface at bearing plate 2 is fixed to the upper end of spring part 5, and the up end at inertia piece 6 is fixed to the lower extreme of spring part 5. When a force application object applies downward pressure to the bearing plate 2, the bearing plate 2 drives the sliding rod 3 to slide downwards in the inner cavity of the sleeve 4, the bearing plate 2 compresses the spring part 5 at the same time, and the spring part 5 in the compressed state exerts elastic force on the inertia block 6 so as to enable the inertia block 6 to move downwards.
Pressure measurement can be because the effect face unevenness and the inconsistent effect of effect face of force application object application pressure, and then makes bearing plate 2 produce the local atress that the degree is not of uniform size. The pressure bearing plate 2 transmits the pressure to the inertia block 6 through the elastic assembly, and can form stable pressure through the above-mentioned transmission path, and finally transmits the stable pressure to the stress plate 7 through the inertia block 6, so as to ensure the accuracy of the finally detected pressure value.
Preferably, the inertia mass 6 is a high-strength metal part or other parts with good compression resistance and plastic deformation resistance, and can stably transmit pressure.
Preferably, the push rod 8 is vertically connected to the middle of the lower end face of the stress plate 7, and the two are integrally formed or welded and fixed. The push rod 8 can stably conduct the pressure of the stress plate 7 to the fiber grating sensor 10 so as to ensure the accuracy of the finally detected pressure value.
Specifically, elasticity resets and is spring clamp 9, and the upside and the downside of spring clamp 9 are provided with two arc elastic pieces relatively, two arc elastic piece integrated into one piece, and inside forms the deformation cavity. The push rod 8 penetrates through the two arc-shaped elastic pieces, and when the stress plate 7 moves downwards under the pressure of the inertia block 6, the two arc-shaped elastic pieces deform relatively to approach each other, so that the lower end of the push rod 8 applies the pressure on the fiber grating sensor 10.
When outside application of force object no longer applyed pressure, inertia piece 6 no longer applys pressure to atress board 7, and at this moment, two arc flexure strips self kick-backs to jack up atress board 7 upwards, so that the lower extreme of push rod 8 breaks away from with fiber grating sensor 10 or no longer applys the effort to fiber grating sensor 10, reach automatic re-setting's in the short time effect, thereby reach the purpose of real-time supervision minute pressure.
In addition, a temperature compensation grating (not labeled in the figure) is also arranged in the main housing 1, and the temperature compensation grating can compensate the influence of temperature on the detection value of the fiber grating sensor 10. The temperature compensation grating can be disposed on the inner sidewall of the main housing 1 or on the bottom of the main housing 1. The temperature compensation grating is connected with the fiber grating sensor 10 in series, so that the number of cables in the main shell 1 is reduced, the cost is reduced, and the adverse effect of the test temperature on the test result is avoided.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. But from restoring to throne sensitization type pressure monitoring device based on fiber grating, its characterized in that includes:
a main housing (1);
the pressure-bearing mechanism is arranged on the upper part of the main shell (1), the pressure-bearing mechanism comprises an inertia block (6) arranged in the main shell (1) and a pressure-bearing plate (2) arranged above the inertia block (6), and an elastic assembly is arranged between the inertia block (6) and the pressure-bearing plate (2);
the force transmission mechanism is arranged on the lower portion of the main shell (1) and comprises a stress plate (7) and a push rod (8), the stress plate (7) is located below the inertia block (6) to transmit the pressure of the inertia block (6), the push rod (8) is connected below the stress plate (7), an elastic reset piece is arranged at the lower end of the stress plate (7), and the elastic reset piece rebounds through the elastic reset piece to drive the push rod (8) to reset through the stress plate (7);
the fiber grating sensor (10) is arranged at the bottom of the main shell (1), and the fiber grating sensor (10) generates wavelength change through pushing of the push rod (8).
2. The fiber grating-based self-resetting sensitization type pressure monitoring device according to claim 1, wherein the main shell (1) is of a cylindrical structure, the upper part of the main shell is open, the lower part of the main shell is closed, the pressure bearing mechanism is arranged at the upper opening end of the main shell (1), the force transmission mechanism is arranged in an inner cavity of the main shell (1), and the fiber grating sensor (10) is arranged at the lower closed end of the main shell (1).
3. The fiber grating-based self-resettable sensitivity-enhancing pressure monitoring device of claim 1, wherein the resilient component comprises:
the lower end of the sleeve (4) is fixedly arranged on the upper end face of the inertia block (6);
the sliding rod (3) penetrates through the inner cavity of the sleeve (4) from top to bottom and is arranged in a sliding manner along the axial direction of the sleeve (4), and the bearing plate (2) is fixedly arranged at the upper end of the sliding rod (3);
the spring piece (5) is sleeved on the outer side of the sleeve (4), the upper end of the spring piece (5) is connected to the lower end face of the bearing plate (2), and the lower end of the spring piece is connected to the upper end face of the inertia block (6).
4. The fiber grating-based self-resettable, sensitivity-enhanced pressure monitoring device of claim 1, wherein the inertial mass (6) is a metallic part.
5. The fiber grating-based self-resettable sensitivity-enhanced pressure monitoring device of claim 1, wherein the push rod (8) is vertically connected to the middle of the lower end surface of the stress plate (7).
6. The fiber grating-based self-resettable sensitivity-enhanced pressure monitoring device of claim 1, wherein the elastic resetting member is a spring clamp (9), two arc-shaped elastic sheets are oppositely arranged on the upper side and the lower side of the spring clamp (9), and the push rod (8) penetrates through the two arc-shaped elastic sheets.
7. The fiber grating based self-resettable, sensitivity-enhanced pressure monitoring device according to any of claims 1-6, wherein a temperature compensation grating is provided in the main housing (1), and wherein the temperature compensation grating is connected in series with the fiber grating sensor (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123086119.XU CN216284037U (en) | 2021-12-09 | 2021-12-09 | Self-resetting sensitization type pressure monitoring device based on fiber bragg grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123086119.XU CN216284037U (en) | 2021-12-09 | 2021-12-09 | Self-resetting sensitization type pressure monitoring device based on fiber bragg grating |
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| Publication Number | Publication Date |
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| CN216284037U true CN216284037U (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123086119.XU Active CN216284037U (en) | 2021-12-09 | 2021-12-09 | Self-resetting sensitization type pressure monitoring device based on fiber bragg grating |
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| CN (1) | CN216284037U (en) |
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2021
- 2021-12-09 CN CN202123086119.XU patent/CN216284037U/en active Active
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