CN217560751U - Water level sensor based on fiber bragg grating - Google Patents
Water level sensor based on fiber bragg grating Download PDFInfo
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- CN217560751U CN217560751U CN202221820379.7U CN202221820379U CN217560751U CN 217560751 U CN217560751 U CN 217560751U CN 202221820379 U CN202221820379 U CN 202221820379U CN 217560751 U CN217560751 U CN 217560751U
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Abstract
The utility model discloses a water level sensor based on fiber bragg grating, which comprises a shell, wherein a measuring component is arranged in the shell, a communicating component is arranged on the side wall of the shell, and the communicating component is communicated with the inner cavity of the shell; a fixing device is arranged above the shell; the measuring assembly comprises a floating core which is slidably connected with the inner cavity of the shell, a connecting lock is fixedly connected to the bottom end of the floating core, a grating tension sensor is fixedly connected to the bottom end of the connecting lock, the grating tension sensor is fixedly connected with the bottom end of the inner cavity of the shell through optical fibers, and the optical fibers extend out of the inner cavity of the shell and are communicated with a processing module. The utility model discloses simple structure, simple operation, measurement accuracy are high, the interference killing feature is strong, are applicable to the water level measurement under the adverse circumstances, can be applied to flood control and disaster relief field by a large scale.
Description
Technical Field
The utility model relates to a disaster prevention and reduction technical field especially relates to a level sensor based on fiber grating.
Background
Since the advent, fiber gratings have been widely used in the field of fiber sensing; the fiber grating sensor has the unique advantages of electromagnetic interference resistance, high sensitivity, small size, light weight, low cost, suitability for being used in high-temperature, corrosive and other environments, and multi-parameter distributed type distinguishing measurement, so the fiber grating sensor becomes a research hotspot of the current sensor.
The existing water level sensors are various in types, complex in structure, high in manufacturing cost, complex in operation and calculation, generally poor in fatigue resistance and durability and easily influenced by environmental factors. When the strain, stress or other physical quantities to be measured around the fiber grating change, the period of the fiber grating or the refractive index of the fiber core changes, so that the wavelength displacement of the fiber grating is generated, and the change condition of the strain can be calculated by monitoring the change of the wavelength; the water level sensor is designed according to the principle, so that the water level sensor with simple structure, convenient operation, high measurement precision and strong anti-interference capability is designed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a level sensor based on fiber grating to solve the problem that above-mentioned prior art exists.
In order to achieve the above purpose, the utility model provides a following scheme: the utility model provides a water level sensor based on fiber bragg grating, which comprises a shell, wherein a measuring component is arranged in the shell, a communicating component is arranged on the side wall of the shell, and the communicating component is communicated with the inner cavity of the shell; a fixing device is arranged above the shell;
the measuring component comprises a floating core which is slidably connected with the inner cavity of the shell, a connecting lock is fixedly connected to the bottom end of the floating core, a grating tension sensor is fixedly connected to the bottom end of the connecting lock, the grating tension sensor is fixedly connected to the bottom end of the inner cavity of the shell through optical fibers, and the optical fibers extend out of the inner cavity of the shell and are communicated with a processing module.
Preferably, the intercommunication subassembly is including seting up from bottom to top the lower extreme water inlet, middle water inlet and the upper end gas vent of shell lateral wall, the lower extreme water inlet middle water inlet with the upper end gas vent respectively with shell inner chamber intercommunication.
Preferably, the middle water inlet is formed in the central side wall of the shell, and the upper end air outlet and the lower end water inlet are symmetrically arranged relative to the middle water inlet.
Preferably, the floating core is of a hollow structure, and the floating core can float in water.
Preferably, the inner cavity of the shell and the floating core are both of a cubic structure, and the section of the inner cavity of the shell is matched with the section of the floating core.
Preferably, the fixing device comprises a fixing piece fixedly connected with the installation position, the fixing piece is detachably connected with a moving piece, and the moving piece is fixedly connected with the top end of the side wall of the shell.
The utility model discloses a following technological effect: the application discloses a water level sensor based on fiber bragg gratings, wherein a shell is fixed through a fixing device, the lower part of the shell is immersed in water, when the external water level changes, the water level of an inner cavity of the shell is flush with the outside through a communicating component, so that the buoyancy of a floating core is changed, the measured value of a grating tension sensor is changed, the measured value is transmitted to a processing component through optical fibers, the water level change is calculated, and the real-time water level is measured; measuring component's floating core sets up at the shell cavity, through intercommunication subassembly and external intercommunication, influence factors such as external water wave impact and wind-force are blockked by the shell, can not make floating core receive the influence, combine grating force sensor's characteristic, have improved the interference killing feature of this device, and measurement accuracy is higher. The utility model discloses simple structure, simple operation, measurement accuracy are high, the interference killing feature is strong, are applicable to the water level measurement under the adverse circumstances, can be applied to flood control relief of disaster field by a large scale.
Compared with the prior art, the utility model discloses there is following advantage:
(1) The water level sensor based on the fiber bragg grating has the advantages of simple structure, low manufacturing cost and convenience for wide use;
(2) The utility model is suitable for a water level monitoring among the disaster prevention and reduction field, the sensor network that a plurality of gratings are constituteed can realize measuring the real-time distributing type of the water level that awaits measuring.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, 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 that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a front view of the water level sensor of the present invention;
FIG. 2 is a schematic view of the structure of the water level sensor of the present invention;
fig. 3 is a schematic cross-sectional view of the housing of the present invention;
wherein, 1, a shell; 2. a floating core; 3. a grating tension sensor; 4. an optical fiber; 5. a processing module; 6. a lower water inlet; 7. a middle water inlet; 8. an upper end exhaust port; 9. a fixing member; 10. and a movable member.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1-3, the utility model provides a water level sensor based on fiber bragg grating, which comprises a shell 1, wherein a measuring component is arranged in the shell 1, a communicating component is arranged on the side wall of the shell 1, and the communicating component is communicated with the inner cavity of the shell 1; a fixing device is arranged above the shell 1;
the measuring assembly comprises a floating core 2 which is slidably connected with the inner cavity of the shell 1, a connecting lock is fixedly connected with the bottom end of the floating core 2, a grating tension sensor 3 is fixedly connected with the bottom end of the inner cavity of the shell 1 through an optical fiber 4, and the optical fiber 4 extends out of the inner cavity of the shell 1 and is communicated with a processing module 5.
The application discloses a water level sensor based on fiber bragg gratings, wherein a shell 1 is fixed through a fixing device, the lower part of the shell is immersed in water, when the external water level changes, the water level of an inner cavity of the shell 1 is flush with the outside through a communicating component, and then the buoyancy of a floating core 2 is changed, so that the measured value of a grating tension sensor 3 is changed and is transmitted to a processing component through an optical fiber 4, the water level change is calculated, and the real-time water level is measured; the floating core 2 of the measuring component is arranged in the inner cavity of the shell 1 and is communicated with the outside through the communicating component, external influence factors such as water wave impact and wind power are blocked by the shell 1, the floating core 2 cannot be influenced, the characteristic of the grating tension sensor 3 is combined, the anti-interference capacity of the device is improved, and the measuring precision is higher.
Furthermore, compared with a common sensor, the fiber grating sensor has incomparable advantages in a strong interference detection environment, and is more suitable for working in a severe environment; compared with a common sensor, the fiber grating sensor has the advantages of high measurement precision, high sensitivity, convenient data acquisition and mature technology.
Furthermore, the processing module 5 is a grating fiber demodulator, the grating tension sensor 3 converts the measured tension information into the movement of the central wavelength of the grating, and the central wavelength drift is demodulated from the measured optical signal, so that the measured information can be measured, and the measurement is not repeated in the prior art.
Further optimization scheme, the intercommunication subassembly includes lower extreme water inlet 6, middle water inlet 7 and the upper end gas vent 8 of seting up at shell 1 lateral wall from bottom to top, and lower extreme water inlet 6, middle water inlet 7 and upper end gas vent 8 communicate with shell 1 inner chamber respectively. When the grating tension sensor is used, the lower end water inlet 6 is immersed in water, external water enters the inner cavity of the shell 1, so that the water level of the inner cavity is the same as the external water, when the external water level changes but does not exceed the middle water inlet 7, the water level of the inner cavity changes along with the change of the buoyancy received by the floating core 2, further the measurement result of the grating tension sensor 3 changes, and at the moment, the middle water inlet 7 and the upper end air outlet 8 discharge air in the inner cavity, so that the influence of the air discharge on the synchronization of the internal water level and the external water level is prevented; when the water level rises to exceed the middle water inlet 7, the upper end exhaust port 8 is used for exhausting air, so that the air pressure inside and outside is consistent; the water level of the device at the highest measurable time does not exceed the position of the upper end exhaust port 8.
In a further optimized scheme, the middle water inlet 7 is arranged on the central side wall of the shell 1, and the upper end exhaust port 8 and the lower end water inlet 6 are symmetrically arranged relative to the middle water inlet 7.
Further optimizing the scheme, floating core 2 is hollow structure, and floating core 2 floats can in aqueous. The floating core 2 is hollow, is made of PE polyethylene plastics, and has light weight, large buoyancy, small influence on a measurement result, wide material selection and low cost.
Furthermore, the shell 1 is made of aluminum, so that the corrosion resistance is good, and the weight is light.
Further optimizing the scheme, the inner cavity of the shell 1 and the floating core 2 are both in a cubic structure, and the section of the inner cavity of the shell 1 is matched with the section of the floating core 2. The main objective is through 1 inner chamber of shell of looks adaptation and the motion skew of 2 outer walls restrictions of core 2 that float, under the prerequisite that does not influence the core 2 buoyancy change of direction from top to bottom, reduces the rocking of core 2 and 1 inner chamber lateral wall of shell, reduces the influence to grating force sensor 3, improves measurement accuracy.
According to a further optimized scheme, the fixing device comprises a fixing piece 9 fixedly connected with the installation position, a movable piece 10 is detachably connected to the fixing piece 9, and the movable piece 10 is fixedly connected with the top end of the side wall of the shell 1. The fixing device is mainly used for fixing the device at a preset position, so that a water inlet at the lower end of the device is immersed in water, and meanwhile, the shell 1 of the device is prevented from floating, and the precision of data acquisition is improved. Fixing member 9 fixed mounting is at the assigned position, and moving part 10 fixed mounting is on the lateral wall top of shell 1, and the removable dismantlement of moving part 10 is connected on fixing member 9, and simple to operate is swift, and the controllability is good.
Furthermore, the connection mode of the movable element 10 and the fixed element 9 includes, but is not limited to, clamping and plugging, which are all conventional detachable connection modes, and are not described herein again.
The using method comprises the following steps:
the method comprises the steps of firstly selecting a position, fixedly installing a fixed part 9 at the designated position, and then fixing a shell 1 on the fixed part 9 through a movable part 10, so that a lower end water inlet 6 of the shell 1 is immersed in water, and a middle water inlet 7 and an upper end exhaust port 8 are exposed out of the water surface, thereby completing installation.
During the use, earlier record water level at that time, then starting equipment, when external water level changes, the rivers pass through inside and outside intercommunication shell 1 of intercommunication subassembly, and then make the water level change in the shell 1, the water level that changes the buoyancy of floating core 2 and changes, and then make the pulling force of floating core 2 to grating force sensor 3 change, the removal of grating center wavelength is transformed into in tensile change, transmit for processing module 5 through optic fibre 4, processing module 5 calculates the change volume in floating core 2 hands with the change of grating center wavelength according to inside procedure, and then calculate the change value of water level through the buoyancy formula.
The utility model discloses simple structure, simple operation, measurement accuracy are high, the interference killing feature is strong, are applicable to the water level measurement under the adverse circumstances, can be applied to flood control relief of disaster field by a large scale.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (6)
1. A water level sensor based on fiber bragg grating is characterized in that: the device comprises a shell (1), wherein a measuring assembly is arranged in the shell (1), a communicating assembly is arranged on the side wall of the shell (1), and the communicating assembly is communicated with an inner cavity of the shell (1); a fixing device is arranged above the shell (1);
the measuring component comprises a floating core (2) which is slidably connected with an inner cavity of the shell (1), a connecting lock is fixedly connected with the bottom end of the floating core (2), a grating tension sensor (3) is fixedly connected with the bottom end of the inner cavity of the shell (1) through an optical fiber (4), and the optical fiber (4) extends out of the inner cavity of the shell (1) and is communicated with a processing module (5).
2. The fiber grating-based water level sensor according to claim 1, wherein: the intercommunication subassembly is including seting up from bottom to top lower extreme water inlet (6), middle water inlet (7) and upper end gas vent (8) of shell (1) lateral wall, lower extreme water inlet (6) middle water inlet (7) with upper end gas vent (8) respectively with shell (1) inner chamber intercommunication.
3. The fiber grating-based water level sensor according to claim 2, wherein: the middle water inlet (7) is arranged on the central side wall of the shell (1), and the upper end exhaust port (8) and the lower end water inlet (6) are symmetrically arranged relative to the middle water inlet (7).
4. The fiber grating-based water level sensor according to claim 1, wherein: the floating core (2) is of a hollow structure, and the floating core (2) can float in water.
5. The fiber grating-based water level sensor according to claim 1, wherein: the inner cavity of the shell (1) and the floating core (2) are both of a cubic structure, and the section of the inner cavity of the shell (1) is matched with the section of the floating core (2).
6. The fiber grating-based water level sensor according to claim 1, wherein: the fixing device comprises a fixing piece (9) fixedly connected with the installation position, a movable piece (10) is detachably connected to the fixing piece (9), and the movable piece (10) is fixedly connected with the top end of the side wall of the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221820379.7U CN217560751U (en) | 2022-07-15 | 2022-07-15 | Water level sensor based on fiber bragg grating |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221820379.7U CN217560751U (en) | 2022-07-15 | 2022-07-15 | Water level sensor based on fiber bragg grating |
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| CN217560751U true CN217560751U (en) | 2022-10-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115892782A (en) * | 2023-01-09 | 2023-04-04 | 北斗启明（北京）节能科技服务有限公司 | Floating oil outlet device state monitoring system |
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2022
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115892782A (en) * | 2023-01-09 | 2023-04-04 | 北斗启明（北京）节能科技服务有限公司 | Floating oil outlet device state monitoring system |
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