CN115683444A - Optical fiber gas pressure sensor and detection method of waste gas generated by disassembling waste power batteries of optical fiber gas pressure sensor - Google Patents
Optical fiber gas pressure sensor and detection method of waste gas generated by disassembling waste power batteries of optical fiber gas pressure sensor Download PDFInfo
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- CN115683444A CN115683444A CN202211402083.8A CN202211402083A CN115683444A CN 115683444 A CN115683444 A CN 115683444A CN 202211402083 A CN202211402083 A CN 202211402083A CN 115683444 A CN115683444 A CN 115683444A
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention belongs to the field of waste gas detection of waste power battery dismantling, and discloses an optical fiber gas pressure sensor and a detection method of waste gas of waste power battery dismantling. Placing the film bag under a calibration atmospheric pressure, recording a reflection spectrum 1 of the Fabry-Perot resonant cavity, and recording the central frequency of any one reflection valley in the reflection spectrum 1 as a resonant frequency 1; placing the film bag in a detection environment for disassembling a waste power battery, recording a reflection spectrum 2 of the Fabry-Perot resonant cavity, and recording the central frequency of a reflection valley, which has the same resonance stage number as the resonance frequency 1, in the reflection spectrum 2 as the resonance frequency 2; obtaining the gas pressure in the detection environment of waste gas generated by disassembling the waste power battery from the resonance frequency 2 and the resonance frequency 1; converting the reflection spectrum 1 and the reflection spectrum 2 into reflection spectrum voltage signals and then sending the reflection spectrum voltage signals into a processing system; the processing system outputs a sensor output signal that includes a gas pressure magnitude. The method is used for monitoring the waste gas generated during the disassembly of the waste power battery.
Description
Technical Field
The invention belongs to the field of electronic waste detection, and particularly relates to an optical fiber gas pressure sensor and a detection method of waste gas generated by dismantling waste power batteries of the optical fiber gas pressure sensor.
Background
Because the waste power batteries also have certain utilization value, the waste power batteries are recycled in order to improve the utilization rate of resources. When carrying out recovery processing to old and useless power battery, can produce a large amount of dusts and toxic gas, current recovery plant generally only carries out simple filtration to waste gas through the mode of filter screen or hydrojet, and this kind of filtration mode can not get rid of dust and toxic gas completely, still causes the excessive of dust and toxic gas easily, and then causes air pollution easily, endangers human healthy.
If the waste power battery is not processed or is not processed properly, the environment can be seriously polluted, the human health is harmed, and potential safety hazards can be possibly generated. Ternary materials and lithium iron phosphate in the anode material of the power battery can pollute water and soil; the graphite powder in the cathode material is easy to generate dust pollution because the particles of the graphite powder are very small; most of organic solvents in the electrolyte are alcohols, so that the electrolyte is easy to absorb by human skin and is easy to be absorbed by the human skin in a volatile manner, and the electrolyte causes harm to human bodies; solutes in the electrolyte, such as lithium hexafluorophosphate, have strong corrosivity, can generate toxic gas Hydrogen Fluoride (HF) and the like when meeting water or high temperature, cause stimulation to human tissues, mucous membranes and upper respiratory tracts through skin and respiratory contact, and have serious corrosion effect on animals and plants. Therefore, how to properly recycle and dispose of the waste power batteries is a practical problem which is not ignored along with the development of new energy industries.
The gas pressure sensor is an instrument for measuring gas pressure, the essence of the gas pressure is the collision of gas atoms or gas molecules on a container wall, the rareness degree of gas is reflected, and the gas pressure sensor has very important practical significance on the life and production activities of people. At present, one gas pressure sensor which is widely applied is a mercury gas pressure gauge, and the gas pressure sensor is measured by utilizing the balance of mercury gravity and gas pressure, but the accuracy of human eye reading is very limited and is easily influenced by other factors in the environment, and the other gas pressure sensor which is widely applied is an electronic gas pressure gauge.
Compared with the prior art, the optical fiber sensor has the obvious advantages of simple structure, small volume, light weight, low cost, small loss, good spectral characteristics, high reliability, high sensitivity, high intellectualization degree and integration degree and the like, particularly has electromagnetic interference resistance, has small influence on the detected environment, is suitable for working in severe environment, and can be used for measuring environments with strong electromagnetic radiation, strong nuclear radiation and strong corrosivity in the fields of physics, biology and chemistry.
Disclosure of Invention
The invention provides an optical fiber gas pressure sensor and a detection method of waste gas generated by dismantling waste power batteries, which are used for monitoring the waste gas generated by dismantling the waste power batteries.
The invention is realized by the following technical scheme:
a chemical fiber gas pressure sensor comprises a light source 1, a fiber isolator 2, a fiber coupler 3, liquid 6, a Fabry-Perot resonant cavity, an outer sleeve 8, a film bag 9, a spectrometer 10 and a processing system 11;
the optical output end of the light source 1 is connected with the optical input end of the optical fiber isolator 2, the optical output end of the optical fiber isolator 2 is connected with the optical input end of the optical fiber coupler 3, and the first optical output end of the optical fiber coupler 3 is connected with the Fabry-Perot resonant cavity; a second optical output end of the optical fiber coupler 3 is connected with an optical input end of a spectrometer 10, an electrical output end of the spectrometer 10 is connected with an electrical input end of a processing system 11, and an electrical output end of the processing system 11 outputs a sensor output signal;
the Fabry-Perot resonant cavity comprises a first optical fiber 4, an air cavity 5, a second optical fiber 7 and a liquid cavity 12;
the light input end of the first optical fiber 4 is connected with the first light output end of the optical fiber coupler 3, the light output end of the first optical fiber 4 is connected with the light input end of the air cavity 5, a liquid cavity 12 is arranged between the air cavity 5 and the second optical fiber 7, the liquid cavity 12 is communicated with the film bag 9, the light output end of the air cavity 5 is connected with the light input end of the liquid cavity 12, and the light output end of the liquid cavity 12 is connected with the light input end of the second optical fiber 7.
A chemical fiber gas pressure sensor is characterized in that an outer sleeve 8 is sequentially wrapped outside a first optical fiber 4, an air cavity 5, a film bag 9, a liquid cavity 12 and a second optical fiber 7, and the liquid cavity 12 is communicated with the outer sleeve 8;
the bottom of the film bag 9 is filled with liquid 6, and the rest part except the liquid 6 in the film bag 9 is filled with air;
the membrane bag 9 is communicated with the outer sleeve 8 through a small hole at the bottom, and the liquid 6 can freely flow between the inside of the membrane bag 9 and the inside of the outer sleeve 8 through the small hole at the bottom of the membrane bag 9.
The transmittance of the film capsule 9 to the output light of the light source 1 is more than 99 percent, and the reflectivity is less than 1 percent.
The curvature of the outer sleeve 8 is zero, and the central axis of the outer sleeve 8 is a straight line;
the jacket 8 completely wraps the first optical fiber 4 and fixes the first optical fiber 4 inside;
the jacket 8 completely encloses the second optical fiber 7 and secures the second optical fiber 7 therein.
In the chemical fiber gas pressure sensor, the end face of the light output end of the first optical fiber 4 is perpendicular to the central axis of the outer sleeve 8;
the end face of the light input end of the second optical fiber 7 is perpendicular to the central axis of the outer sleeve 8, and the reflectivity of the output light of the light source 1 is greater than 99%.
In the chemical fiber gas pressure sensor, the air cavity 5 is filled with air;
the length of the air chamber 5 is greater than the length of the liquid chamber 12.
A waste power battery dismantling waste gas detection method based on a chemical fiber gas pressure sensor specifically comprises the following steps:
step 1: placing the film capsule 9 under a calibration atmospheric pressure, recording a reflection spectrum of the Fabry-Perot resonant cavity, recording the reflection spectrum as a reflection spectrum 1, and recording the central frequency of any one reflection valley in the reflection spectrum 1 as a resonant frequency 1;
step 2: placing the film bag 9 in a detection environment for disassembling a waste power battery, recording a reflection spectrum of the Fabry-Perot resonant cavity, recording the reflection spectrum as a reflection spectrum 2, and recording the central frequency of a reflection valley, which has the same resonance stage number as the resonance frequency 1, in the reflection spectrum 2 as the resonance frequency 2;
and step 3: based on the resonance frequency 1 measured in the step 1 and the resonance frequency 2 measured in the step 2, obtaining the gas pressure in the detection environment for disassembling the waste power battery from the frequency difference between the resonance frequency 2 and the resonance frequency 1;
and 4, step 4: the spectrometer 10 collects the reflection spectrum 1 measured in the step 1 and the reflection spectrum 2 measured in the step 2, converts the reflection spectrum 1 and the reflection spectrum 2 into reflection spectrum voltage signals and sends the reflection spectrum voltage signals into the processing system 11;
and 5: the processing system 11 outputs a sensor output signal that contains the magnitude of the gas pressure.
A method for detecting waste gas generated in dismantling of waste power batteries based on chemical fiber gas pressure sensors is disclosed, wherein the step 3 specifically comprises the following steps:
step 3.1: judging the magnitude relation between the resonant frequency 2 and the resonant frequency 1, and if the resonant frequency 2 is less than the resonant frequency 1, performing a step 4; if the resonant frequency 2 is equal to the resonant frequency 1, performing step 5; if the resonant frequency 2 is greater than the resonant frequency 1, performing step 6;
step 3.2: judging that the gas pressure in the detection environment for disassembling the waste power battery is greater than the calibration atmospheric pressure;
step 3.3: judging that the gas pressure in the detection environment for disassembling the waste power battery is equal to the calibration atmospheric pressure;
step 3.4: and judging that the gas pressure in the detection environment for disassembling the waste power battery is smaller than the calibration atmospheric pressure.
The method for detecting the waste gas generated in the disassembly of the waste power batteries based on the chemical fiber gas pressure sensor is characterized in that the length of the air cavity 5 is greater than that of the liquid cavity 12, so that the resonant number of the resonant frequency 2 is equal to that of the resonant frequency 1.
A method for detecting waste gas disassembled from waste power batteries based on chemical fiber gas pressure sensors is characterized in that a processing system 11 in step 4 comprises a sampling analysis circuit 11-1 and an output circuit 11-2, the sampling analysis circuit 11-1 receives a reflection spectrum voltage signal converted by a spectrometer 10, and the sampling analysis circuit 11-1 collects a reflection spectrum voltage signal of a film bag 9;
the sampling analysis circuit 11-1 sends the gas pressure information in the detection environment for disassembling the waste power battery to the output circuit 11-2, and the output circuit 11-2 outputs the output signal of the sensor.
The invention has the beneficial effects that:
the invention has the advantages of simple structure and high precision.
The invention can realize the advantages of anti-electromagnetic interference, small influence on the detected environment and good corrosion resistance in the detection environment for disassembling the waste power battery.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a schematic circuit diagram of the processing system of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A chemical fiber gas pressure sensor comprises a light source 1, a fiber isolator 2, a fiber coupler 3, liquid 6, a Fabry-Perot resonant cavity, namely a jacket 8, a film bag 9, a spectrometer 10 and a processing system 11;
the optical output end of the light source 1 is connected with the optical input end of the optical fiber isolator 2, the optical output end of the optical fiber isolator 2 is connected with the optical input end of the optical fiber coupler 3, and the first optical output end of the optical fiber coupler 3 is connected with the Fabry-Perot resonant cavity; a second optical output end of the optical fiber coupler 3 is connected with an optical input end of a spectrometer 10, an electrical output end of the spectrometer 10 is connected with an electrical input end of a processing system 11, and an electrical output end of the processing system 11 outputs a sensor output signal;
the Fabry-Perot resonant cavity comprises a first optical fiber 4, an air cavity 5, a second optical fiber 7 and a liquid cavity 12;
the light input end of the first optical fiber 4 is connected with the first light output end of the optical fiber coupler 3, the light output end of the first optical fiber 4 is connected with the light input end of the air cavity 5, a liquid cavity 12 is arranged between the air cavity 5 and the second optical fiber 7, the liquid cavity 12 is communicated with the film bag 9, the light output end of the air cavity 5 is connected with the light input end of the liquid cavity 12, and the light output end of the liquid cavity 12 is connected with the light input end of the second optical fiber 7.
A chemical fiber gas pressure sensor is characterized in that an outer sleeve 8 is sequentially wrapped outside a first optical fiber 4, an air cavity 5, a film bag 9, a liquid cavity 12 and a second optical fiber 7, and the liquid cavity 12 is communicated with the outer sleeve 8;
the bottom of the film bag 9 is filled with liquid 6, and the rest part except the liquid 6 in the film bag 9 is filled with air;
the liquid chamber 12 is in communication with the outer casing 8 and the liquid 6 is able to flow freely between the interior of the membrane pouch 9 and the interior of the outer casing 8 through small holes in the bottom of the membrane pouch 9.
The transmittance of the film capsule 9 to the output light of the light source 1 is more than 99 percent, and the reflectivity is less than 1 percent.
The curvature of the outer sleeve 8 is zero, and the central axis of the outer sleeve 8 is a straight line;
the jacket 8 completely wraps the first optical fiber 4 and fixes the first optical fiber 4 inside;
the jacket 8 completely encases the second optical fiber 7 and secures the second optical fiber 7 inside.
The end face of the light output end of the first optical fiber 4 is perpendicular to the central axis of the outer sleeve 8;
the end face of the light input end of the second optical fiber 7 is perpendicular to the central axis of the outer sleeve 8, and the reflectivity of the end face to the output light of the light source 1 is greater than 99%.
A chemical fiber gas pressure sensor, the air cavity 5 is filled with air;
the length of the air chamber 5 is greater than the length of the liquid chamber 12.
A method for detecting waste gas generated in the disassembly of waste power batteries based on chemical fiber gas pressure sensors specifically comprises the following steps:
step 1: placing the film capsule 9 under a calibration atmospheric pressure, recording a reflection spectrum of the Fabry-Perot resonant cavity, recording the reflection spectrum as a reflection spectrum 1, and recording the central frequency of any one reflection valley in the reflection spectrum 1 as a resonant frequency 1;
and 2, step: placing the film bag 9 in a detection environment for disassembling a waste power battery, recording a reflection spectrum of the Fabry-Perot resonant cavity, recording the reflection spectrum as a reflection spectrum 2, and recording the central frequency of a reflection valley, which has the same resonance stage number as the resonance frequency 1, in the reflection spectrum 2 as the resonance frequency 2;
and step 3: based on the resonance frequency 1 measured in the step 1 and the resonance frequency 2 measured in the step 2, obtaining the gas pressure in the detection environment for disassembling the waste power battery from the frequency difference between the resonance frequency 2 and the resonance frequency 1;
and 4, step 4: the spectrometer 10 collects the reflection spectrum 1 measured in the step 1 and the reflection spectrum 2 measured in the step 2, converts the reflection spectrum 1 and the reflection spectrum 2 into reflection spectrum voltage signals and sends the reflection spectrum voltage signals into the processing system 11;
and 5: the processing system 11 outputs a sensor output signal that contains the magnitude of the gas pressure.
A method for detecting waste gas generated in dismantling of waste power batteries based on chemical fiber gas pressure sensors is disclosed, wherein the step 3 specifically comprises the following steps:
step 3.1: judging the magnitude relation between the resonant frequency 2 and the resonant frequency 1, and if the resonant frequency 2 is smaller than the resonant frequency 1, performing the step 4; if the resonant frequency 2 is equal to the resonant frequency 1, performing step 5; if the resonant frequency 2 is greater than the resonant frequency 1, performing step 6;
step 3.2: judging that the gas pressure in the detection environment for disassembling the waste power battery is greater than the calibration atmospheric pressure;
step 3.3: judging that the gas pressure in the detection environment for disassembling the waste power battery is equal to the calibration atmospheric pressure;
step 3.4: and judging that the gas pressure in the detection environment for disassembling the waste power battery is smaller than the calibration atmospheric pressure.
The method for detecting waste gas generated in disassembly of waste power batteries based on chemical fiber gas pressure sensors is characterized in that the length of an air cavity 5 is larger than that of a liquid cavity 12, so that the change of the optical path of a Fabry-Perot resonant cavity is small, and the resonant stage of a resonant frequency 2 is equal to that of a resonant frequency 1.
A waste power battery disassembly waste gas detection method based on chemical fiber gas pressure sensors is characterized in that a processing system 11 in a step 4 comprises a sampling analysis circuit 11-1 and an output circuit 11-2, the sampling analysis circuit 11-1 receives a reflection spectrum voltage signal converted by a spectrometer 10, and the sampling analysis circuit 11-1 collects a reflection spectrum voltage signal of a film bag 9;
the sampling analysis circuit 11-1 sends the gas pressure information in the detection environment for disassembling the waste power battery to the output circuit 11-2, and the output circuit 11-2 outputs the output signal of the sensor.
When light enters the Fabry-Perot resonant cavity, the light with certain specific light wavelength exists, the optical path when the light is transmitted in the Fabry-Perot resonant cavity in a reciprocating mode once is integral multiple of the light wavelength of the Fabry-Perot resonant cavity, the light wavelength is called the 'resonant wavelength' of the Fabry-Perot resonant cavity, the light frequency corresponding to the resonant wavelength of the Fabry-Perot resonant cavity is called the 'resonant frequency' of the Fabry-Perot resonant cavity, the frequency intervals of any two adjacent resonant frequencies of the Fabry-Perot resonant cavity are equal, the frequency intervals are called the 'free spectral width' of the Fabry-Perot resonant cavity, the light with the light frequency being the resonant frequency of the Fabry-Perot resonant cavity is resonated in the Fabry-Perot resonant cavity, and the reflectivity of the light is minimum when the Fabry-Perot resonant cavity resonates, therefore, the reflection spectrum of the Fabry-Perot resonant cavity is the reflection valley of the equal frequency intervals, the frequency intervals are the free spectral width of the Fabry-Perot resonant cavity, the minimum reflectivity of the reflection valley is the reflectivity at the resonant frequency of the Fabry-Perot resonant cavity, and the center frequency of the Fabry-Perot resonant cavity is the frequency of the Fabry-Perot resonant valley;
because the output light of the light source 1 is continuous in time, the spectral distribution of the light intensity is uniform, and the line width of the light is far greater than the free spectral width of the fabry-perot resonator, the output light of the light source 1 contains a large number of resonant frequencies of the fabry-perot resonator;
when the output light of the light source 1 is reflected by the fabry-perot resonator, because the output light of the light source 1 contains the resonant frequency of a large number of fabry-perot resonators, and the light frequency is the minimum reflectivity of the light of the resonant frequency of the fabry-perot resonators, the reflection spectrum of the fabry-perot resonators is the reflection valley with equal frequency interval, the frequency interval is the free spectral width of the fabry-perot resonators, the minimum reflectivity of the reflection valley is the reflectivity at the resonant frequency of the fabry-perot resonators, and the central frequency of the reflection valley is the resonant frequency of the fabry-perot resonators;
when the gas pressure in the detection environment for disassembling the waste power battery is equal to the calibrated atmospheric pressure, because the outer sleeve 8 completely wraps the first optical fiber 4 and fixes the first optical fiber 4 in the outer sleeve, the outer sleeve 8 completely wraps the second optical fiber 7 and fixes the second optical fiber 7 in the outer sleeve, the film bag 9 is communicated with the outer sleeve 8 through a small hole at the bottom, and the liquid 6 can freely flow between the inside of the film bag 9 and the inside of the outer sleeve 8 through a small hole at the bottom of the film bag 9, therefore, the length of the air cavity 5 is equal to the length of the air cavity 5 during calibration, the length of the liquid cavity is equal to the length of the liquid cavity during calibration, and thus, the optical path of the Fabry-Perot resonant cavity is also equal to the optical path of the Fabry-Perot resonant cavity during calibration, and at the same time, compared with the resonant frequency of the Fabry-Perot resonant cavity during calibration, the resonant frequency of the Fabry-Perot resonant cavity is unchanged;
when the gas pressure in the detection environment for disassembling the waste power battery is greater than the calibration atmospheric pressure, the outer sleeve 8 completely wraps the first optical fiber 4 and fixes the first optical fiber 4 in the outer sleeve, the outer sleeve 8 completely wraps the second optical fiber 7 and fixes the second optical fiber 7 in the outer sleeve, the film bag 9 is communicated with the outer sleeve 8 through a small hole at the bottom, and the liquid 6 can freely flow between the inside of the film bag 9 and the inside of the outer sleeve 8 through a small hole at the bottom of the film bag 9, so that the length of the air cavity 5 is smaller than that of the air cavity 5 during calibration, the length of the liquid cavity is greater than that of the liquid cavity during calibration, and the refractive index of the liquid is greater than that of the air, so that the optical path of the Fabry-Perot resonant cavity is greater than that of the Fabry-Perot resonant cavity during calibration; since the length of the air cavity 5 is much greater than that of the liquid cavity, the optical path change of the fabry-perot resonator is small, and at this time, compared with the resonant frequency of the fabry-perot resonator during calibration, the resonant frequency of the fabry-perot resonator in the same resonant order moves to the low frequency direction;
when the gas pressure in the detection environment for disassembling the waste power battery is smaller than the calibration atmospheric pressure, the outer sleeve 8 completely wraps the first optical fiber 4 and fixes the first optical fiber 4 in the outer sleeve, the outer sleeve 8 completely wraps the second optical fiber 7 and fixes the second optical fiber 7 in the outer sleeve, the film bag 9 is communicated with the outer sleeve 8 through a small hole at the bottom, and the liquid 6 can freely flow between the inside of the film bag 9 and the inside of the outer sleeve 8 through a small hole at the bottom of the film bag 9, so that the length of the air cavity 5 is larger than that of the air cavity 5 during calibration, the length of the liquid cavity is smaller than that of the liquid cavity during calibration, and the refractive index of the liquid is larger than that of the air, so that the optical path of the Fabry-Perot resonant cavity is smaller than that of the Fabry-Perot resonant cavity during calibration; since the length of the air chamber 5 is much longer than that of the liquid chamber, the change of the optical path length of the fabry-perot resonator is small, and at this time, the resonant frequency of the fabry-perot resonator in the same resonant order moves to a high frequency direction as compared with the resonant frequency of the fabry-perot resonator during calibration.
Claims (10)
1. A chemical fiber gas pressure sensor is characterized by comprising a light source (1), a fiber isolator (2), a fiber coupler (3), liquid (6), a Fabry-Perot resonant cavity, an outer sleeve (8), a film bag (9), a spectrometer (10) and a processing system (11);
the optical output end of the light source (1) is connected with the optical input end of the optical fiber isolator (2), the optical output end of the optical fiber isolator (2) is connected with the optical input end of the optical fiber coupler (3), and the first optical output end of the optical fiber coupler (3) is connected with the Fabry-Perot resonant cavity; a second optical output end of the optical fiber coupler (3) is connected with an optical input end of a spectrometer (10), an electrical output end of the spectrometer (10) is connected with an electrical input end of a processing system (11), and an electrical output end of the processing system (11) outputs a sensor output signal;
the Fabry-Perot resonant cavity comprises a first optical fiber (4), an air cavity (5), a second optical fiber (7) and a liquid cavity (12);
the light input end of first optic fibre (4) is connected with the first light output end of fiber coupler (3), the light output end of first optic fibre (4) is connected with the light input end of air chamber (5), be liquid chamber (12) between air chamber (5) and second optic fibre (7), liquid chamber (12) and film bag (9) UNICOM, the light output end of air chamber (5) is connected with the light input end of liquid chamber (12), the light output end of liquid chamber (12) is connected with being connected of the light input end of second optic fibre (7).
2. A chemo-fiber gas pressure sensor according to claim 1, wherein the outer sheath (8) is wrapped in sequence outside the first optical fiber (4), the air chamber (5), the membrane capsule (9), the liquid chamber (12) and the second optical fiber (7), the liquid chamber (12) being in communication with the outer sheath (8);
the bottom of Bao Monang (9) is filled with liquid (6), and the other part except the liquid (6) in Bao Monang (9) is filled with air;
the Bao Monang (9) is communicated with the outer sleeve (8) through a small hole at the bottom, and the liquid (6) can freely flow between the inside of the film bag (9) and the inside of the outer sleeve (8) through the small hole at the bottom of the film bag (9).
3. A chemical fiber gas pressure sensor according to claim 1, wherein the transmittance of Bao Monang (9) to the output light of light source (1) is more than 99% and the reflectance is less than 1%.
4. A chemical fiber gas pressure sensor according to claim 2, wherein the curvature of the outer jacket (8) is zero, and the central axis of the outer jacket (8) is a straight line;
the outer sleeve (8) completely wraps the first optical fiber (4) and fixes the first optical fiber (4) inside;
the outer sleeve (8) completely wraps the second optical fiber (7) and fixes the second optical fiber (7) inside.
5. A chemo-fiber gas pressure sensor according to claim 1, characterized in that the end face of the light output end of the first optical fiber (4) is perpendicular to the central axis of the outer jacket (8);
the end face of the light input end of the second optical fiber (7) is perpendicular to the central axis of the outer sleeve (8), and the reflectivity of the end face to the output light of the light source (1) is greater than 99%.
6. A chemical fiber gas pressure sensor according to claim 1, characterized in that the air cavity (5) is filled with air;
the length of the air chamber (5) is greater than the length of the liquid chamber (12).
7. The method for detecting the waste gas generated in the dismantling of the waste power batteries based on the chemical fiber gas pressure sensor according to any one of claims 1 to 6, wherein the method for detecting the waste gas generated in the dismantling of the waste power batteries specifically comprises the following steps:
step 1: placing the film bag (9) under a calibration atmospheric pressure, recording a reflection spectrum of the Fabry-Perot resonant cavity, marking the reflection spectrum as a reflection spectrum 1, and marking the central frequency of any one reflection valley in the reflection spectrum 1 as a resonant frequency 1;
step 2: placing the film bag (9) in a detection environment for disassembling the waste power battery, recording a reflection spectrum of the Fabry-Perot resonant cavity, recording the reflection spectrum as a reflection spectrum 2, and recording the central frequency of a reflection valley in the reflection spectrum 2, which has the same resonance order as the resonance frequency 1, as the resonance frequency 2;
and step 3: based on the resonance frequency 1 measured in the step 1 and the resonance frequency 2 measured in the step 2, obtaining the gas pressure in the detection environment of the waste gas generated by disassembling the waste power battery from the waste power battery according to the frequency difference between the resonance frequency 2 and the resonance frequency 1;
and 4, step 4: the spectrometer (10) collects the reflection spectrum 1 measured in the step (1) and the reflection spectrum 2 measured in the step (2), converts the reflection spectrum 1 and the reflection spectrum 2 into reflection spectrum voltage signals and sends the reflection spectrum voltage signals into a processing system (11);
and 5: the processing system (11) outputs a sensor output signal containing a gas pressure magnitude.
8. The method for detecting the waste gas generated in the disassembly of the waste power batteries based on the chemical fiber gas pressure sensor as claimed in claim 7, wherein the step 3 specifically comprises the following steps:
step 3.1: judging the magnitude relation between the resonant frequency 2 and the resonant frequency 1, and if the resonant frequency 2 is smaller than the resonant frequency 1, performing the step 4; if the resonant frequency 2 is equal to the resonant frequency 1, performing step 5; if the resonant frequency 2 is greater than the resonant frequency 1, performing step 6;
step 3.2: judging that the gas pressure in the detection environment for disassembling the waste power battery is greater than the calibration atmospheric pressure;
step 3.3: judging that the gas pressure in the detection environment for disassembling the waste power battery is equal to the calibration atmospheric pressure;
step 3.4: and judging that the gas pressure in the detection environment for disassembling the waste power battery is smaller than the calibration atmospheric pressure.
9. The method for detecting the waste power battery dismantling exhaust gas based on the chemical fiber gas pressure sensor as recited in claim 8, wherein the length of the air chamber (5) is greater than that of the liquid chamber (12), so that the number of resonant stages of the resonant frequency 2 is equal to that of the resonant frequency 1.
10. The method for detecting the waste gas disassembled from the waste power batteries based on the chemical fiber gas pressure sensor is characterized in that the processing system (11) in the step 4 comprises a sampling analysis circuit (11-1) and an output circuit (11-2), the sampling analysis circuit (11-1) receives a reflection spectrum voltage signal converted by the spectrometer (10), and the sampling analysis circuit (11-1) collects a reflection spectrum voltage signal of Bao Monang (9);
the sampling analysis circuit (11-1) sends gas pressure information in a detection environment for disassembling the waste power battery into the output circuit (11-2), and the output circuit (11-2) outputs a sensor output signal.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0228677A2 (en) * | 1985-12-30 | 1987-07-15 | Metricor, Inc. | Optical pressure-sensing system |
| CN103994851A (en) * | 2014-05-15 | 2014-08-20 | 香港理工大学深圳研究院 | Resonant type Fabry-Perot optical fiber sensor, manufacturing method and air pressure detecting method |
| CN206321374U (en) * | 2016-11-11 | 2017-07-11 | 中国计量大学 | A kind of fabry perot interferometer baroceptor based on optical fiber ring laser |
| CN110779653A (en) * | 2019-10-31 | 2020-02-11 | 金华伏安光电科技有限公司 | Gas pressure detector and system based on optical fiber structure resonant cavity principle |
| CN112432724A (en) * | 2020-12-01 | 2021-03-02 | 东北林业大学 | Stress sensor based on vernier effect of optical fiber resonant cavity and stress measurement method |
| CN218765758U (en) * | 2022-11-10 | 2023-03-28 | 常州厚德再生资源科技有限公司 | Optical fiber gas pressure sensor for detecting waste gas generated by disassembling waste battery |
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2022
- 2022-11-10 CN CN202211402083.8A patent/CN115683444B/en active Active
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| EP0228677A2 (en) * | 1985-12-30 | 1987-07-15 | Metricor, Inc. | Optical pressure-sensing system |
| CN103994851A (en) * | 2014-05-15 | 2014-08-20 | 香港理工大学深圳研究院 | Resonant type Fabry-Perot optical fiber sensor, manufacturing method and air pressure detecting method |
| CN206321374U (en) * | 2016-11-11 | 2017-07-11 | 中国计量大学 | A kind of fabry perot interferometer baroceptor based on optical fiber ring laser |
| CN110779653A (en) * | 2019-10-31 | 2020-02-11 | 金华伏安光电科技有限公司 | Gas pressure detector and system based on optical fiber structure resonant cavity principle |
| CN112432724A (en) * | 2020-12-01 | 2021-03-02 | 东北林业大学 | Stress sensor based on vernier effect of optical fiber resonant cavity and stress measurement method |
| CN218765758U (en) * | 2022-11-10 | 2023-03-28 | 常州厚德再生资源科技有限公司 | Optical fiber gas pressure sensor for detecting waste gas generated by disassembling waste battery |
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