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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- 239000013307 optical fiber Substances 0.000 title claims abstract description 96
- 239000007789 gas Substances 0.000 title claims abstract description 82
- 239000002699 waste material Substances 0.000 title claims abstract description 48
- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 239000002912 waste gas Substances 0.000 title claims abstract description 15
- 238000001228 spectrum Methods 0.000 claims abstract description 53
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- 238000012545 processing Methods 0.000 claims abstract description 23
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- 238000000034 method Methods 0.000 claims description 12
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- 238000002310 reflectometry Methods 0.000 claims description 10
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- 229910052753 mercury Inorganic materials 0.000 description 3
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
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- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
本发明属于废旧动力电池拆解废气检测领域，公开一种光纤气体压强传感器及其废旧动力电池拆解废气的检测方法。将薄膜囊置于校准大气压下，记录法布里‑珀罗谐振腔的反射谱1，将反射谱1中任意一个反射谷的中心频率记为谐振频率1；将薄膜囊置于废旧动力电池拆解的检测环境中，记录法布里‑珀罗谐振腔的反射谱2，将反射谱2中与谐振频率1谐振级数相同的反射谷的中心频率记为谐振频率2；由谐振频率2与谐振频率1的频率差得出废旧动力电池拆解废气的检测环境中的气体压强；将反射谱1和反射谱2转化为反射谱电压信号后将其送入处理系统；处理系统输出传感器输出信号，传感器输出信号包含气体压强大小。本发明用于废旧动力电池拆解时废气的监测。
The invention belongs to the field of waste gas detection from dismantling waste power batteries, and discloses an optical fiber gas pressure sensor and a detection method for dismantling waste gas of waste power batteries. Place the film capsule under the calibrated atmospheric pressure, record the reflection spectrum 1 of the Fabry-Perot resonator, and record the center frequency of any reflection valley in the reflection spectrum 1 as the resonance frequency 1; place the film capsule in the disassembled power battery In the detection environment of the solution, the reflection spectrum 2 of the Fabry-Perot resonator is recorded, and the center frequency of the reflection valley with the same resonance order as the resonance frequency 1 in the reflection spectrum 2 is recorded as the resonance frequency 2; by the resonance frequency 2 and The frequency difference of resonance frequency 1 is used to obtain the gas pressure in the detection environment of waste power battery dismantling exhaust gas; the reflection spectrum 1 and reflection spectrum 2 are converted into reflection spectrum voltage signals and sent to the processing system; the processing system outputs the sensor output signal , the sensor output signal contains the gas pressure. The invention is used for monitoring the waste gas when the waste power battery is disassembled.
Description
技术领域technical field
本发明属于电子废弃物检测领域，具体涉及一种光纤气体压强传感器及其废旧动力电池拆解废气的检测方法。The invention belongs to the field of electronic waste detection, and in particular relates to an optical fiber gas pressure sensor and a detection method for dismantling exhaust gas of waste power batteries.
背景技术Background technique
由于废旧动力电池还具有一定的利用价值，为了提高资源的利用率，会对废旧动力电池进行回收处理。在对废旧动力电池进行回收处理时，会产生大量的粉尘和有毒气体，现有的回收设备一般仅仅是通过滤网或喷液的方式对废气进行简单过滤，这种过滤方式不能将粉尘和有毒气体完全去除，还是容易造成粉尘和有毒气体的外溢，进而容易造成空气污染，危害人类的身体健康。Since waste power batteries still have certain utilization value, in order to improve the utilization rate of resources, waste power batteries will be recycled. When recycling waste power batteries, a large amount of dust and toxic gases will be generated. The existing recycling equipment generally only simply filters the exhaust gas through a filter or spraying liquid. This filtering method cannot remove dust and toxic gases. If the gas is completely removed, it is still easy to cause the overflow of dust and toxic gases, which will easily cause air pollution and endanger human health.
废旧动力电池若不处理或处理不当，会严重污染环境，危害人体健康，也有可能产生安全隐患。动力电池正极材料中三元材料和磷酸铁锂会对水体和土壤造成污染；负极材料中的石墨粉，因其颗粒很小，易产生粉尘污染；电解液中的有机溶剂大多为醇类，易被人体皮肤吸收以及挥发性吸入，对人体造成危害；电解液中的溶质如六氟磷酸锂具有强腐蚀性，遇水或高温能够产生有毒气体氟化氢(HF)等，经由皮肤、呼吸接触对人体组织，粘膜和上呼吸道造成刺激，对动植物也有严重的腐蚀作用。因此，如何对对废旧动力电池妥善回收处理成为伴随着新能源产业发展的一个不容忽视的现实课题。If waste power batteries are not disposed of or disposed of improperly, they will seriously pollute the environment, endanger human health, and may also cause potential safety hazards. The ternary materials and lithium iron phosphate in the positive electrode material of the power battery will pollute the water body and the soil; the graphite powder in the negative electrode material is easy to cause dust pollution because of its small particles; most of the organic solvents in the electrolyte are alcohols, which are easy to It is absorbed by human skin and volatile inhaled, causing harm to human body; the solute in the electrolyte, such as lithium hexafluorophosphate, is highly corrosive, and can produce toxic gas hydrogen fluoride (HF) when exposed to water or high temperature. It can cause irritation to the upper respiratory tract, and also has a serious corrosive effect on animals and plants. Therefore, how to properly recycle waste power batteries has become a realistic issue that cannot be ignored along with the development of the new energy industry.
气体压强传感器是用于测量气体压强的仪器，气体压强的本质是气体原子或气体分子对容器壁的碰撞，反映气体的稀薄程度，对人们的生活、生产活动有非常重要的现实意义。目前应用比较广泛的一种气体压强传感器是水银气体压强计，利用水银重力与气体压力的平衡来测量，但人眼读数的精度是非常有限的，而且容易受到环境中其他因素的影响，另一种应用比较广泛的气体压强传感器是电子气体压强计，相较于水银气体压强计，其灵敏度更高、稳定性更好，但缺点也十分明显，例如容易受电磁干扰、制备工艺复杂、成本高等，同时其抗腐蚀性能差，在生物和化学领域，只能用于测量干燥、无腐蚀性环境中的气体压强。Gas pressure sensor is an instrument used to measure gas pressure. The essence of gas pressure is the collision of gas atoms or gas molecules against the container wall, reflecting the thinness of gas, which has very important practical significance for people's life and production activities. A gas pressure sensor that is widely used at present is a mercury gas pressure gauge, which uses the balance between mercury gravity and gas pressure to measure, but the accuracy of human eye readings is very limited, and it is easily affected by other factors in the environment. Another A widely used gas pressure sensor is the electronic gas pressure sensor. Compared with the mercury gas pressure sensor, it has higher sensitivity and better stability, but its disadvantages are also very obvious, such as being susceptible to electromagnetic interference, complicated preparation process, and high cost. , At the same time, its corrosion resistance is poor. In the biological and chemical fields, it can only be used to measure the gas pressure in a dry, non-corrosive environment.
相比之下，光纤传感器具有非常明显的优势，例如结构简单、体积小、重量轻、成本低、损耗小、光谱特性好、可靠性高、灵敏度高、智能化与集成化程度高等优点，特别是光纤传感器抗电磁干扰、对被测环境影响小，且适合在恶劣环境中工作，在物理、生物、化学领域，可用于测量强电磁辐射、强核辐射、强腐蚀性的环境。In contrast, fiber optic sensors have very obvious advantages, such as simple structure, small size, light weight, low cost, low loss, good spectral characteristics, high reliability, high sensitivity, high intelligence and integration, etc. It is an optical fiber sensor that is resistant to electromagnetic interference, has little impact on the measured environment, and is suitable for working in harsh environments. In the fields of physics, biology, and chemistry, it can be used to measure strong electromagnetic radiation, strong nuclear radiation, and strong corrosive environments.
发明内容Contents of the invention
本发明提供一种光纤气体压强传感器及其废旧动力电池拆解废气的检测方法，用于废旧动力电池拆解时废气的监测。The invention provides an optical fiber gas pressure sensor and a detection method for dismantling exhaust gas of waste power batteries, which are used for monitoring waste gas during dismantling of waste power batteries.
本发明通过以下技术方案实现：The present invention is realized through the following technical solutions:
一种化光纤气体压强传感器，所述传感器包括光源1、光纤隔离器2、光纤耦合器3、液体6、法布里-珀罗谐振腔、外套8、薄膜囊9、光谱仪10和处理系统11；A chemical fiber gas pressure sensor, the sensor includes a light source 1, an optical fiber isolator 2, an optical fiber coupler 3, a
所述光源1的光输出端与光纤隔离器2的光输入端相连接，所述光纤隔离器2的光输出端与光纤耦合器3的光输入端相连接，所述光纤耦合器3的第一光输出端与法布里-珀罗谐振腔相连接；所述光纤耦合器3的第二光输出端与光谱仪10的光输入端相连接，所述光谱仪10的电输出端与处理系统11的电输入端相连接，所述处理系统11的电输出端输出传感器输出信号；The optical output end of the light source 1 is connected to the optical input end of the optical fiber isolator 2, the optical output end of the optical fiber isolator 2 is connected to the optical input end of the optical fiber coupler 3, and the optical input end of the optical fiber coupler 3 An optical output end is connected with the Fabry-Perot resonant cavity; the second optical output end of the fiber coupler 3 is connected with the optical input end of the
所述法布里-珀罗谐振腔包括第一光纤4、空气腔5、第二光纤7和液体腔12；The Fabry-Perot cavity comprises a first optical fiber 4, an air cavity 5, a second optical fiber 7 and a liquid cavity 12;
所述第一光纤4的光输入端与光纤耦合器3的第一光输出端相连接，所述第一光纤4的光输出端与空气腔5的光输入端相连接，所述空气腔5与第二光纤7之间为液体腔12，所述液体腔12与薄膜囊9联通，所述空气腔5的光输出端与液体腔12的光输入端相连接，所述液体腔12的光输出端与第二光纤7的光输入端的相连接。The optical input end of the first optical fiber 4 is connected with the first optical output end of the fiber coupler 3, the optical output end of the first optical fiber 4 is connected with the optical input end of the air cavity 5, and the air cavity 5 Between the second optical fiber 7 is a liquid cavity 12, the liquid cavity 12 communicates with the film capsule 9, the light output end of the air cavity 5 is connected with the light input end of the liquid cavity 12, the light of the liquid cavity 12 The output end is connected with the optical input end of the second optical fiber 7 .
一种化光纤气体压强传感器，所述外套8依次包裹在第一光纤4、空气腔5、薄膜囊9、液体腔12和第二光纤7的外部，所述液体腔12与外套8相连通；An optical fiber gas pressure sensor, the outer casing 8 is wrapped in the first optical fiber 4, the air cavity 5, the film capsule 9, the liquid cavity 12 and the outside of the second optical fiber 7 in sequence, and the liquid cavity 12 is connected to the outer casing 8;
所述薄膜囊9的底部装有液体6，所述薄膜囊9内除液体6的其余部分装有空气；The bottom of the film capsule 9 is equipped with
所述薄膜囊9通过底部的小孔与外套8相连通，液体6通过薄膜囊9底部的小孔能在薄膜囊9内部与外套8内部间自由流动。The film capsule 9 communicates with the overcoat 8 through the small hole at the bottom, and the
一种化光纤气体压强传感器，所述薄膜囊9对光源1的输出光的透射率大于99％、反射率小于1％。An optical fiber gas pressure sensor, the transmittance of the film capsule 9 to the output light of the light source 1 is greater than 99%, and the reflectivity is less than 1%.
一种化光纤气体压强传感器，所述外套8的曲率为零，外套8的中轴线为一条直线；A chemical fiber gas pressure sensor, the curvature of the outer jacket 8 is zero, and the central axis of the outer jacket 8 is a straight line;
所述外套8完全包裹住第一光纤4、并将第一光纤4固定在其内部；The jacket 8 completely wraps the first optical fiber 4 and fixes the first optical fiber 4 inside;
所述外套8完全包裹住第二光纤7、并将第二光纤7固定在其内部。The jacket 8 completely wraps the second optical fiber 7 and fixes the second optical fiber 7 inside.
一种化光纤气体压强传感器，所述第一光纤4的光输出端的端面垂直于外套8的中轴线；An optical 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 jacket 8;
所述第二光纤7的光输入端的端面垂直于外套8的中轴线、且对光源1的输出光的反射率大于99％。The end face of the light input end of the second optical fiber 7 is perpendicular to the central axis of the jacket 8 and has a reflectivity of the light output from the light source 1 greater than 99%.
一种化光纤气体压强传感器，所述空气腔5中填充空气；A chemical fiber gas pressure sensor, filled with air in the air chamber 5;
所述空气腔5的长度大于液体腔12的长度。The length of the air cavity 5 is greater than the length of the liquid cavity 12 .
一种基于化光纤气体压强传感器的废旧动力电池拆解废气的检测方法，所述电子废弃物气体检测方法具体包括以下步骤：A method for detecting waste gas from the dismantling of waste power batteries based on optical fiber gas pressure sensors, the electronic waste gas detection method specifically includes the following steps:
步骤1：将薄膜囊9置于校准大气压下，记录法布里-珀罗谐振腔的反射谱，将此反射谱记为反射谱1，将反射谱1中任意一个反射谷的中心频率记为谐振频率1；Step 1: Place the membrane capsule 9 under calibrated atmospheric pressure, record the reflection spectrum of the Fabry-Perot resonator, mark this reflection spectrum as reflection spectrum 1, and record the center frequency of any reflection valley in reflection spectrum 1 as resonant frequency 1;
步骤2：将薄膜囊9置于废旧动力电池拆解的检测环境中，记录法布里-珀罗谐振腔的反射谱、并将此反射谱记为反射谱2，将反射谱2中与谐振频率1谐振级数相同的反射谷的中心频率记为谐振频率2；Step 2: Place the film capsule 9 in the detection environment where the waste power battery is disassembled, record the reflection spectrum of the Fabry-Perot resonator, and mark this reflection spectrum as reflection spectrum 2, and compare the reflection spectrum 2 with the resonance The center frequency of the reflection valley with the same resonant series at frequency 1 is recorded as resonant frequency 2;
步骤3：基于步骤1所测量的谐振频率1和步骤2所测量的谐振频率2，由谐振频率2与谐振频率1的频率差得出废旧动力电池拆解的检测环境中的气体压强；Step 3: Based on the resonant frequency 1 measured in step 1 and the resonant frequency 2 measured in step 2, the gas pressure in the detection environment for dismantling the waste power battery is obtained from the frequency difference between the resonant frequency 2 and the resonant frequency 1;
步骤4：光谱仪10采集步骤1所测量的反射谱1和步骤2所测量的反射谱2，并将反射谱1和反射谱2转化为反射谱电压信号后将其送入处理系统11；Step 4: The
步骤5：处理系统11输出传感器输出信号，传感器输出信号包含气体压强大小。Step 5: The
一种基于化光纤气体压强传感器的废旧动力电池拆解废气的检测方法，所述步骤3具体包括以下步骤：A method for detecting waste gas from the dismantling of waste power batteries based on chemical fiber gas pressure sensors, the step 3 specifically includes the following steps:
步骤3.1：判断谐振频率2与谐振频率1的大小关系，若谐振频率2小于谐振频率1，则进行步骤4；若谐振频率2等于谐振频率1，则进行步骤5；若谐振频率2大于谐振频率1，则进行步骤6；Step 3.1: Determine the magnitude relationship between resonance frequency 2 and resonance frequency 1. If resonance frequency 2 is less than resonance frequency 1, proceed to step 4; if resonance frequency 2 is equal to resonance frequency 1, proceed to step 5; if resonance frequency 2 is greater than resonance frequency 1, proceed to
步骤3.2：则判定废旧动力电池拆解的检测环境中的气体压强大于校准大气压；Step 3.2: It is determined that the gas pressure in the detection environment where the waste power battery is disassembled is greater than the calibration atmospheric pressure;
步骤3.3：则判定废旧动力电池拆解的检测环境中的气体压强等于校准大气压；Step 3.3: It is determined that the gas pressure in the detection environment for dismantling the waste power battery is equal to the calibration atmospheric pressure;
步骤3.4：则判定废旧动力电池拆解的检测环境中的气体压强小于校准大气压。Step 3.4: It is determined that the gas pressure in the detection environment where the waste power battery is disassembled is lower than the calibration atmospheric pressure.
一种基于化光纤气体压强传感器的废旧动力电池拆解废气的检测方法，所述空气腔5的长度大于液体腔12的长度，因此，谐振频率2的谐振级数等于谐振频率1的谐振级数。A method for detecting exhaust gas from dismantling waste power batteries based on optical fiber gas pressure sensors, the length of the air cavity 5 is greater than the length of the liquid cavity 12, therefore, the resonance series of the resonance frequency 2 is equal to the resonance series of the resonance frequency 1 .
一种基于化光纤气体压强传感器的废旧动力电池拆解废气的检测方法，所述步骤4的处理系统11包括采样分析电路11-1和输出电路11-2，所述采样分析电路11-1接收光谱仪10转化的反射谱电压信号，所述采样分析电路11-1采集薄膜囊9的反射谱电压信号；A method for detecting waste gas from dismantling waste power batteries based on optical fiber gas pressure sensors, the
所述采样分析电路11-1将废旧动力电池拆解的检测环境中的气体压强信息送入输出电路11-2，输出电路11-2输出传感器输出信号。The sampling analysis circuit 11-1 sends the gas pressure information in the detection environment of dismantling the waste power battery to the output circuit 11-2, and the output circuit 11-2 outputs the sensor output signal.
本发明的有益效果是：The beneficial effects of the present invention are:
本发明具有结构简单、精度高的优点。The invention has the advantages of simple structure and high precision.
本发明在废旧动力电池拆解的检测环境中能实现抗电磁干扰、对被测环境影响小及抗腐蚀性能好的优点。The invention can realize the advantages of anti-electromagnetic interference, little impact on the tested environment and good corrosion resistance in the detection environment of dismantling waste power batteries.
附图说明Description of drawings
图1是本发明的结构示意图。Fig. 1 is a schematic structural view of the present invention.
图2是本发明的处理系统的电路结构示意图。Fig. 2 is a schematic diagram of the circuit structure of the processing system of the present invention.
具体实施方式Detailed ways
下面将结合本发明实施例中的附图对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
一种化光纤气体压强传感器，所述传感器包括光源1、光纤隔离器2、光纤耦合器3、液体6、法布里-珀罗谐振腔即为、外套8、薄膜囊9、光谱仪10和处理系统11；A kind of optical fiber gas pressure sensor, described sensor comprises light source 1, optical fiber isolator 2, optical fiber coupler 3,
所述光源1的光输出端与光纤隔离器2的光输入端相连接，所述光纤隔离器2的光输出端与光纤耦合器3的光输入端相连接，所述光纤耦合器3的第一光输出端与法布里-珀罗谐振腔相连接；所述光纤耦合器3的第二光输出端与光谱仪10的光输入端相连接，所述光谱仪10的电输出端与处理系统11的电输入端相连接，所述处理系统11的电输出端输出传感器输出信号；The optical output end of the light source 1 is connected to the optical input end of the optical fiber isolator 2, the optical output end of the optical fiber isolator 2 is connected to the optical input end of the optical fiber coupler 3, and the optical input end of the optical fiber coupler 3 An optical output end is connected with the Fabry-Perot resonant cavity; the second optical output end of the fiber coupler 3 is connected with the optical input end of the
所述法布里-珀罗谐振腔包括第一光纤4、空气腔5、第二光纤7和液体腔12；The Fabry-Perot cavity comprises a first optical fiber 4, an air cavity 5, a second optical fiber 7 and a liquid cavity 12;
所述第一光纤4的光输入端与光纤耦合器3的第一光输出端相连接，所述第一光纤4的光输出端与空气腔5的光输入端相连接，所述空气腔5与第二光纤7之间为液体腔12，所述液体腔12与薄膜囊9联通，所述空气腔5的光输出端与液体腔12的光输入端相连接，所述液体腔12的光输出端与第二光纤7的光输入端的相连接。The optical input end of the first optical fiber 4 is connected with the first optical output end of the fiber coupler 3, the optical output end of the first optical fiber 4 is connected with the optical input end of the air cavity 5, and the air cavity 5 Between the second optical fiber 7 is a liquid cavity 12, the liquid cavity 12 communicates with the film capsule 9, the light output end of the air cavity 5 is connected with the light input end of the liquid cavity 12, the light of the liquid cavity 12 The output end is connected with the optical input end of the second optical fiber 7 .
一种化光纤气体压强传感器，所述外套8依次包裹在第一光纤4、空气腔5、薄膜囊9、液体腔12和第二光纤7的外部，所述液体腔12与外套8相连通；An optical fiber gas pressure sensor, the outer casing 8 is wrapped in the first optical fiber 4, the air cavity 5, the film capsule 9, the liquid cavity 12 and the outside of the second optical fiber 7 in sequence, and the liquid cavity 12 is connected to the outer casing 8;
所述薄膜囊9的底部装有液体6，所述薄膜囊9内除液体6的其余部分装有空气；The bottom of the film capsule 9 is equipped with
所述液体腔12与外套8相连通，液体6通过薄膜囊9底部的小孔能在薄膜囊9内部与外套8内部间自由流动。The liquid chamber 12 communicates with the jacket 8, and the
一种化光纤气体压强传感器，所述薄膜囊9对光源1的输出光的透射率大于99％、反射率小于1％。An optical fiber gas pressure sensor, the transmittance of the film capsule 9 to the output light of the light source 1 is greater than 99%, and the reflectivity is less than 1%.
一种化光纤气体压强传感器，所述外套8的曲率为零，外套8的中轴线为一条直线；A chemical fiber gas pressure sensor, the curvature of the outer jacket 8 is zero, and the central axis of the outer jacket 8 is a straight line;
所述外套8完全包裹住第一光纤4、并将第一光纤4固定在其内部；The jacket 8 completely wraps the first optical fiber 4 and fixes the first optical fiber 4 inside;
所述外套8完全包裹住第二光纤7、并将第二光纤7固定在其内部。The jacket 8 completely wraps the second optical fiber 7 and fixes the second optical fiber 7 inside.
一种化光纤气体压强传感器，所述第一光纤4的光输出端的端面垂直于外套8的中轴线；An optical 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 jacket 8;
所述第二光纤7的光输入端的端面垂直于外套8的中轴线、且对光源1的输出光的反射率大于99％。The end face of the light input end of the second optical fiber 7 is perpendicular to the central axis of the jacket 8 and has a reflectivity of the light output from the light source 1 greater than 99%.
一种化光纤气体压强传感器，所述空气腔5中填充空气；A chemical fiber gas pressure sensor, filled with air in the air chamber 5;
所述空气腔5的长度大于液体腔12的长度。The length of the air cavity 5 is greater than the length of the liquid cavity 12 .
一种基于化光纤气体压强传感器的废旧动力电池拆解废气的检测方法，所述电子废弃物气体测量方法具体包括以下步骤：A method for detecting waste gas from the dismantling of waste power batteries based on optical fiber gas pressure sensors, the electronic waste gas measurement method specifically includes the following steps:
步骤1：将薄膜囊9置于校准大气压下，记录法布里-珀罗谐振腔的反射谱，将此反射谱记为反射谱1，将反射谱1中任意一个反射谷的中心频率记为谐振频率1；Step 1: Place the membrane capsule 9 under calibrated atmospheric pressure, record the reflection spectrum of the Fabry-Perot resonator, mark this reflection spectrum as reflection spectrum 1, and record the center frequency of any reflection valley in reflection spectrum 1 as resonant frequency 1;
步骤2：将薄膜囊9置于废旧动力电池拆解的检测环境中，记录法布里-珀罗谐振腔的反射谱、并将此反射谱记为反射谱2，将反射谱2中与谐振频率1谐振级数相同的反射谷的中心频率记为谐振频率2；Step 2: Place the film capsule 9 in the detection environment where the waste power battery is disassembled, record the reflection spectrum of the Fabry-Perot resonator, and mark this reflection spectrum as reflection spectrum 2, and compare the reflection spectrum 2 with the resonance The center frequency of the reflection valley with the same resonant series at frequency 1 is recorded as resonant frequency 2;
步骤3：基于步骤1所测量的谐振频率1和步骤2所测量的谐振频率2，由谐振频率2与谐振频率1的频率差得出废旧动力电池拆解的检测环境中的气体压强；Step 3: Based on the resonant frequency 1 measured in step 1 and the resonant frequency 2 measured in step 2, the gas pressure in the detection environment for dismantling the waste power battery is obtained from the frequency difference between the resonant frequency 2 and the resonant frequency 1;
步骤4：光谱仪10采集步骤1所测量的反射谱1和步骤2所测量的反射谱2，并将反射谱1和反射谱2转化为反射谱电压信号后将其送入处理系统11；Step 4: The
步骤5：处理系统11输出传感器输出信号，传感器输出信号包含气体压强大小。Step 5: The processing
一种基于化光纤气体压强传感器的废旧动力电池拆解废气的检测方法，所述步骤3具体包括以下步骤：A method for detecting waste gas from the dismantling of waste power batteries based on chemical fiber gas pressure sensors, the step 3 specifically includes the following steps:
步骤3.1：判断谐振频率2与谐振频率1的大小关系，若谐振频率2小于谐振频率1，则进行步骤4；若谐振频率2等于谐振频率1，则进行步骤5；若谐振频率2大于谐振频率1，则进行步骤6；Step 3.1: Determine the magnitude relationship between resonance frequency 2 and resonance frequency 1. If resonance frequency 2 is less than resonance frequency 1, proceed to step 4; if resonance frequency 2 is equal to resonance frequency 1, proceed to step 5; if resonance frequency 2 is greater than resonance frequency 1, proceed to step 6;
步骤3.2：则判定废旧动力电池拆解的检测环境中的气体压强大于校准大气压；Step 3.2: It is determined that the gas pressure in the detection environment where the waste power battery is disassembled is greater than the calibration atmospheric pressure;
步骤3.3：则判定废旧动力电池拆解的检测环境中的气体压强等于校准大气压；Step 3.3: It is determined that the gas pressure in the detection environment for dismantling the waste power battery is equal to the calibration atmospheric pressure;
步骤3.4：则判定废旧动力电池拆解的检测环境中的气体压强小于校准大气压。Step 3.4: It is determined that the gas pressure in the detection environment where the waste power battery is disassembled is lower than the calibration atmospheric pressure.
一种基于化光纤气体压强传感器的废旧动力电池拆解废气的检测方法，所述空气腔5的长度大于液体腔12的长度，因此，法布里-珀罗谐振腔的光程变化较小，谐振频率2的谐振级数等于谐振频率1的谐振级数。A method for detecting exhaust gas from dismantling waste power batteries based on optical fiber gas pressure sensors, the length of the air cavity 5 is greater than the length of the liquid cavity 12, therefore, the optical path of the Fabry-Perot resonant cavity changes less, The number of resonance series at resonance frequency 2 is equal to the number of resonance series at resonance frequency 1.
一种基于化光纤气体压强传感器的废旧动力电池拆解废气的检测方法，所述步骤4的处理系统11包括采样分析电路11-1和输出电路11-2，所述采样分析电路11-1接收光谱仪10转化的反射谱电压信号，所述采样分析电路11-1采集薄膜囊9的反射谱电压信号；A method for detecting waste gas from dismantling waste power batteries based on optical fiber gas pressure sensors, the
所述采样分析电路11-1将废旧动力电池拆解的检测环境中的气体压强信息送入输出电路11-2，输出电路11-2输出传感器输出信号。The sampling analysis circuit 11-1 sends the gas pressure information in the detection environment of dismantling the waste power battery to the output circuit 11-2, and the output circuit 11-2 outputs the sensor output signal.
当光进入法布里-珀罗谐振腔时，存在某些特定光波长的光，满足在法布里-珀罗谐振腔中往复传播一次时的光程是自身光波长的整数倍，这些光波长称为法布里-珀罗谐振腔的“谐振波长”，法布里-珀罗谐振腔的谐振波长所对应的光频率称为法布里-珀罗谐振腔的“谐振频率”，法布里-珀罗谐振腔的任意两相邻谐振频率的频率间隔相等，且该频率间隔称为法布里-珀罗谐振腔的“自由谱宽”，光频率为法布里-珀罗谐振腔谐振频率的光均在法布里-珀罗谐振腔中发生谐振，且谐振时光的反射率最小，因此，法布里-珀罗谐振腔的反射谱为等频率间隔的反射谷，此频率间隔即为法布里-珀罗谐振腔的自由谱宽，反射谷的最小反射率即为法布里-珀罗谐振腔谐振频率处的反射率、且反射谷的中心频率即为法布里-珀罗谐振腔的谐振频率；When light enters the Fabry-Perot resonator, there are certain light wavelengths of light, satisfying that the optical path when reciprocating once in the Fabry-Perot resonator is an integer multiple of the wavelength of its own light, these lights The wavelength is called the "resonance wavelength" of the Fabry-Perot resonator, and the optical frequency corresponding to the resonant wavelength of the Fabry-Perot resonator is called the "resonance frequency" of the Fabry-Perot resonator. The frequency interval between any two adjacent resonant frequencies of the Bry-Perot resonator is equal, and this frequency interval is called the "free spectral width" of the Fabry-Perot resonator, and the optical frequency is the Fabry-Perot resonance The light at the resonant frequency of the cavity resonates in the Fabry-Perot resonator, and the reflectivity of the resonant light is the smallest. Therefore, the reflection spectrum of the Fabry-Perot resonator is a reflection valley with equal frequency intervals. The interval is the free spectral width of the Fabry-Perot resonator, the minimum reflectivity of the reflection valley is the reflectivity at the resonant frequency of the Fabry-Perot resonator, and the center frequency of the reflection valley is the Fabry-Perot resonator frequency. - the resonant frequency of the Perot resonator;
由于光源1的输出光在时间上是连续的，光强度的频谱分布是均匀的，且光的线宽远大于法布里-珀罗谐振腔的自由谱宽，因此，光源1的输出光包含大量法布里-珀罗谐振腔的谐振频率；Since the output light of light source 1 is continuous in time, the spectral distribution of light intensity is uniform, and the linewidth of light is much larger than the free spectral width of the Fabry-Perot resonator, therefore, the output light of light source 1 contains Resonant frequencies of a large number of Fabry-Perot resonators;
光源1的输出光经法布里-珀罗谐振腔反射时，由于光源1的输出光包含大量法布里-珀罗谐振腔的谐振频率，而光频率为法布里-珀罗谐振腔谐振频率的光的反射率最小，因此，法布里-珀罗谐振腔的反射谱为等频率间隔的反射谷，此频率间隔即为法布里-珀罗谐振腔的自由谱宽，反射谷的最小反射率即为法布里-珀罗谐振腔谐振频率处的反射率、且反射谷的中心频率即为法布里-珀罗谐振腔的谐振频率；When the output light of light source 1 is reflected by the Fabry-Perot resonator, since the output light of light source 1 contains a large number of resonant frequencies of the Fabry-Perot resonator, and the optical frequency is the resonant frequency of the Fabry-Perot resonator The light reflectivity of the frequency is the smallest, therefore, the reflection spectrum of the Fabry-Perot resonator is a reflection valley with equal frequency intervals, and this frequency interval is the free spectral width of the Fabry-Perot resonator, and the reflection valley The minimum reflectivity is the reflectivity at the resonant frequency of the Fabry-Perot resonator, and the center frequency of the reflection valley is the resonant frequency of the Fabry-Perot resonator;
当废旧动力电池拆解的检测环境中的气体压强等于校准大气压时，由于外套8完全包裹住第一光纤4、并将第一光纤4固定在其内部，外套8完全包裹住第二光纤7、并将第二光纤7固定在其内部，且薄膜囊9通过底部的小孔与外套8相连通，液体6通过薄膜囊9底部的小孔可以在薄膜囊9内部与外套8内部间自由流动，因此，空气腔5的长度等于校准时空气腔5的长度，液体腔的长度等于校准时液体腔的长度，这样，法布里-珀罗谐振腔的光程也等于校准时法布里-珀罗谐振腔的光程，此时，与校准时法布里-珀罗谐振腔的谐振频率相比，法布里-珀罗谐振腔的谐振频率不变；When the gas pressure in the detection environment of dismantling the waste power battery is equal to the calibration atmospheric pressure, since the jacket 8 completely wraps the first optical fiber 4 and fixes the first optical fiber 4 inside, the jacket 8 completely wraps the second optical fiber 7, And the second optical fiber 7 is fixed inside it, and the small hole at the bottom of the film capsule 9 communicates with the overcoat 8, and the
当废旧动力电池拆解的检测环境中的气体压强大于校准大气压时，由于外套8完全包裹住第一光纤4、并将第一光纤4固定在其内部，外套8完全包裹住第二光纤7、并将第二光纤7固定在其内部，且薄膜囊9通过底部的小孔与外套8相连通，液体6通过薄膜囊9底部的小孔可以在薄膜囊9内部与外套8内部间自由流动，因此，空气腔5的长度小于校准时空气腔5的长度，液体腔的长度大于校准时液体腔的长度，由于液体折射率大于空气折射率，因此，法布里-珀罗谐振腔的光程大于校准时法布里-珀罗谐振腔的光程；由于空气腔5的长度远大于液体腔的长度，因此，法布里-珀罗谐振腔的光程变化较小，此时，与校准时法布里-珀罗谐振腔的谐振频率相比，法布里-珀罗谐振腔相同谐振级数的谐振频率向低频方向移动；When the gas pressure in the detection environment where the waste power battery is disassembled is greater than the calibration atmospheric pressure, since the jacket 8 completely wraps the first optical fiber 4 and fixes the first optical fiber 4 inside, the jacket 8 completely wraps the second optical fiber 7, And the second optical fiber 7 is fixed inside it, and the small hole at the bottom of the film capsule 9 communicates with the overcoat 8, and the
当废旧动力电池拆解的检测环境中的气体压强小于校准大气压时，由于外套8完全包裹住第一光纤4、并将第一光纤4固定在其内部，外套8完全包裹住第二光纤7、并将第二光纤7固定在其内部，且薄膜囊9通过底部的小孔与外套8相连通，液体6通过薄膜囊9底部的小孔可以在薄膜囊9内部与外套8内部间自由流动，因此，空气腔5的长度大于校准时空气腔5的长度，液体腔的长度小于校准时液体腔的长度，由于液体折射率大于空气折射率，因此，法布里-珀罗谐振腔的光程小于校准时法布里-珀罗谐振腔的光程；由于空气腔5的长度远大于液体腔的长度，因此，法布里-珀罗谐振腔的光程变化较小，此时，与校准时法布里-珀罗谐振腔的谐振频率相比，法布里-珀罗谐振腔相同谐振级数的谐振频率向高频方向移动。When the gas pressure in the detection environment of dismantling the waste power battery is lower than the calibration atmospheric pressure, since the jacket 8 completely wraps the first optical fiber 4 and fixes the first optical fiber 4 inside, the jacket 8 completely wraps the second optical fiber 7, And the second optical fiber 7 is fixed inside it, and the small hole at the bottom of the film capsule 9 communicates with the overcoat 8, and the
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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 | A fiber-optic gas pressure sensor for waste battery dismantling exhaust gas detection |
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2022
- 2022-11-10 CN CN202211402083.8A patent/CN115683444B/en active Active
Patent 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 | A fiber-optic gas pressure sensor for waste battery dismantling exhaust gas detection |
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