WO2017096943A1 - Apparatus for detecting oxygen concentration - Google Patents

Apparatus for detecting oxygen concentration Download PDF

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Publication number
WO2017096943A1
WO2017096943A1 PCT/CN2016/095622 CN2016095622W WO2017096943A1 WO 2017096943 A1 WO2017096943 A1 WO 2017096943A1 CN 2016095622 W CN2016095622 W CN 2016095622W WO 2017096943 A1 WO2017096943 A1 WO 2017096943A1
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Prior art keywords
detecting
circuit board
detection
gas
pathway
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PCT/CN2016/095622
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French (fr)
Chinese (zh)
Inventor
翁兆国
张礼安
邓洁
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佛山市顺德区键合电子有限公司
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Publication of WO2017096943A1 publication Critical patent/WO2017096943A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/02—Analysing fluids
    • G01N29/024—Analysing fluids by measuring propagation velocity or propagation time of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/021—Gases
    • G01N2291/0212—Binary gases

Definitions

  • the present invention relates to the field of gas concentration detection technology, and in particular, to a device for detecting oxygen concentration.
  • the apparatus for detecting the oxygen concentration is to measure the proportion of oxygen in the nitrogen-oxygen mixed gas by ultrasonic technology.
  • the sampling data changes greatly due to the change of the flowing gas. Poor consistency.
  • the intake air outlet end of the gas passage forms a certain angle with the detection passage, so that the air flow velocity and the flow direction at both ends are inconsistent with the flow velocity and the flow direction of the air flow in the entire detection passage, increasing the measurement error, and eliminating both ends.
  • the impact of airflow changes requires longer detection channels to meet measurement requirements, resulting in higher costs.
  • the technical problem to be solved by the present invention is to provide a device for detecting oxygen concentration, in order to solve the sampling process caused by the prior art, due to the change of the flowing gas, the sampling data changes greatly, the consistency is poor, and the two are eliminated.
  • the influence of the change of the end airflow requires a longer detection channel to meet the measurement requirements, resulting in a cost increase and the like.
  • a device for detecting oxygen concentration comprising a detection circuit board, wherein: the detection circuit board is provided with a detection channel, the detection channel and the detection The circuit board is detachably connected, and two ends of the detecting channel are respectively provided with a sealing layer, and ultrasonic detecting and receiving sensors are respectively disposed on two sides of the detecting circuit board, and the probes of the ultrasonic transmitting and receiving sensors are respectively sealed by a sealing layer on the detecting channel.
  • a gas passage is disposed above the detecting passage, and the gas passage is parallel to the detecting circuit board and is disposed to intersect with the detecting passage.
  • the gas passage has an air inlet at one end and an air outlet at the other end.
  • a diffusion channel is provided between the gas channel and the detection channel.
  • the two side walls of the detecting channel are respectively provided with positioning blocks, and the positioning block and the detecting circuit board are connected by bolts.
  • the sealing layer is an epoxy resin glue layer.
  • the detecting circuit board is provided with a plurality of mounting holes.
  • the gas passage and the detecting passage are formed by crisscrossing, and one end of the gas passage is provided with an air inlet, and the other end is provided with an air outlet.
  • a diffusion channel is arranged between the gas channel and the detection channel, and the sample gas flows through the gas channel in the gas channel, and flows through the diffusion channel into the detection channel.
  • the high concentration gas diffuses to the low concentration gas, and finally the gas channel and the detection channel The gas concentration reaches the dynamic balance.
  • the oxygen partial pressure in the detection channel can be regarded as constant.
  • the ultrasonic transceiver sensor is in the dynamic equilibrium state of the sample gas, the detection channel transmits and receives ultrasonic waves, and the ultrasonic wave propagation is detected by the detection.
  • Speed you can calculate the nitrogen and oxygen mixture in the detection channel. The volume fraction of oxygen in the gas increases the accuracy of the test.
  • FIG. 3 is a plan view of the present invention.
  • 1-detection circuit board 2-detection channel, 3-sealing layer, 4-ultrasonic transceiver sensor, 5-gas channel, 6-inlet port, 7-outlet port, 8-diffusion channel, 9- Mounting holes, 10-positioning block, 11-bolt.
  • a device for detecting oxygen concentration comprising a detection circuit board 1, wherein the detection circuit board 1 is provided with a detection channel 2, the detection channel 2 and detection Circuit board 1 is detachable
  • the two ends of the detecting circuit board 1 are respectively provided with a sealing layer 3, and the ultrasonic transmitting and receiving sensors 4 are respectively disposed on the two sides of the detecting circuit board 1, and the probes of the ultrasonic transmitting and receiving sensor 4 are respectively sealed by the sealing layer 3
  • the two ends of the detection channel 2 are disposed above the detection channel 2, and the gas channel 5 is parallel to the detection circuit board 1 and intersects with the detection channel 2, and one end of the gas channel 5 is provided with an air inlet.
  • the mouth 6 has an air outlet 7 at the other end, and a diffusion channel 8 is disposed between the gas passage 5 and the detecting passage 2.
  • the two side walls of the detecting channel 2 are respectively provided with positioning blocks 10, the positioning block 10 and the detecting circuit board 1 are connected by bolts 11, and the detecting channel 2 is installed and detected by the positioning block 10.
  • the installation is firm, the stability is good, and the disassembly is convenient.
  • the sealing layer 3 is an epoxy resin glue layer, and the epoxy resin glue sealing effect is good, and the price is low, and the cost is reduced.
  • the detecting circuit board 1 is provided with a plurality of mounting holes 9 for facilitating the installation of the entire device.
  • the apparatus for detecting oxygen concentration in the structure of the present invention the gas passage 5 and the detecting passage 2 are formed in a crisscross pattern, and the gas passage 5 has an air inlet 6 at one end and a gas outlet 7 at the other end.
  • a diffusion channel 8 is installed between the channel 5 and the detection channel 2, and the sample gas flows through the gas channel 5 and flows through the diffusion channel 8 to the detection channel 2. According to Fick's law, the high concentration gas diffuses to the low concentration gas, and finally the gas The gas concentration in the channel 5 and the detection channel 2 is dynamically balanced.
  • the gas to be measured enters through the diffusion mode and is evenly distributed in the detection channel 2, there is no excessive dynamic airflow interference, the data fluctuation is small, the measurement error is reduced, and the measurement is improved. With the measurement accuracy, the data can be sampled in the shorter detection channel 2, eliminating the need for longer detection channels to meet the measurement requirements and reducing costs.

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  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

The present invention relates to the technical field of gas concentration detection. Disclosed is an apparatus for detecting oxygen concentration, comprising a detection circuit board (1), and a detection pathway (2) provided on the detection circuit board (1), wherein the detection pathway (2) is detachably connected with the detection circuit board (1). Both sides of the detection pathway (2) are provided with a sealing layer (3), and both sides of the detection circuit board (1) are provided with an ultrasonic receiving-transmitting sensor (4). The probes of the ultrasonic receiving-transmitting sensors (4) are sealed on both sides of the detection pathway (2) by the sealing layers (3). A gas pathway (5) is arranged above the detection pathway (2), and the gas pathway (5) is parallel to the detection circuit board (1) and intersects with the detection pathway (2). One end of the gas pathway (5) is provided with a gas inlet (6), and the other end is provided with a gas outlet (7). A diffusion pathway (8) is arranged between the gas pathway (5) and the detection pathway (2). The apparatus for detecting the oxygen concentration features a simple and reasonable structure, precise measurement and high cost efficiency.

Description

发明名称：一种检测氧气浓度的装置  Title of Invention: A device for detecting oxygen concentration
技术领域  Technical field
[0001] 本发明涉及气体浓度检测技术领域， 特别涉及一种检测氧气浓度的装置。  [0001] The present invention relates to the field of gas concentration detection technology, and in particular, to a device for detecting oxygen concentration.
背景技术  Background technique
[0002] 现有技术中的检测氧气浓度的装置， 是通过超声波技术测量氮氧混合气体中氧 气比例， 该装置的传感器在多次采样过程中， 由于流动气体存在变化， 导致采 样数据变动大， 一致性差。 另外， 气体通道的进气出气端与检测通道形成一定 角度， 导致在整个检测通道中， 两端的气流速度和流向与整个检测通道中气流 的流速和流向不一致， 增加测量误差， 而且为消除两端气流变动带来的影响， 则需要较长的检测通道才能满足测量要求， 导致成本提高。  [0002] In the prior art, the apparatus for detecting the oxygen concentration is to measure the proportion of oxygen in the nitrogen-oxygen mixed gas by ultrasonic technology. In the process of multiple sampling of the sensor of the device, the sampling data changes greatly due to the change of the flowing gas. Poor consistency. In addition, the intake air outlet end of the gas passage forms a certain angle with the detection passage, so that the air flow velocity and the flow direction at both ends are inconsistent with the flow velocity and the flow direction of the air flow in the entire detection passage, increasing the measurement error, and eliminating both ends. The impact of airflow changes requires longer detection channels to meet measurement requirements, resulting in higher costs.
技术问题  technical problem
[0003] 本发明所要解决的技术问题是提供一种检测氧气浓度的装置， 以解决现有技术 中导致的采样过程中， 由于流动气体存在变化， 导致采样数据变动大， 一致性 差， 为消除两端气流变动带来的影响， 则需要较长的检测通道才能满足测量要 求， 导致成本提高等上述多项缺陷。  [0003] The technical problem to be solved by the present invention is to provide a device for detecting oxygen concentration, in order to solve the sampling process caused by the prior art, due to the change of the flowing gas, the sampling data changes greatly, the consistency is poor, and the two are eliminated. The influence of the change of the end airflow requires a longer detection channel to meet the measurement requirements, resulting in a cost increase and the like.
问题的解决方案  Problem solution
技术解决方案  Technical solution
[0004] 为实现上述目的， 本发明提供以下的技术方案： 一种检测氧气浓度的装置， 包 括检测电路板， 其特征在于： 所述检测电路板上设有检测通道， 所述检测通道 与检测电路板可拆卸连接， 所述检测通道的两端分别设有密封层， 所述检测电 路板的两侧分别设有超声波收发传感器， 所述超声波收发传感器的探头分别由 密封层密封于检测通道的两端， 所述检测通道的上方设有气体通道， 所述气体 通道平行于检测电路板并与检测通道交叉设置， 所述气体通道的一端设有进气 口， 另一端设有出气口， 所述气体通道与检测通道之间设有扩散通道。  [0004] In order to achieve the above object, the present invention provides the following technical solutions: A device for detecting oxygen concentration, comprising a detection circuit board, wherein: the detection circuit board is provided with a detection channel, the detection channel and the detection The circuit board is detachably connected, and two ends of the detecting channel are respectively provided with a sealing layer, and ultrasonic detecting and receiving sensors are respectively disposed on two sides of the detecting circuit board, and the probes of the ultrasonic transmitting and receiving sensors are respectively sealed by a sealing layer on the detecting channel. At both ends, a gas passage is disposed above the detecting passage, and the gas passage is parallel to the detecting circuit board and is disposed to intersect with the detecting passage. The gas passage has an air inlet at one end and an air outlet at the other end. A diffusion channel is provided between the gas channel and the detection channel.
[0005] 优选的， 所述检测通道的两侧壁分别设有定位块， 所述定位块与检测电路板通 过螺栓连接。 [0006] 优选的， 所述密封层为环氧树脂胶水层。 [0005] Preferably, the two side walls of the detecting channel are respectively provided with positioning blocks, and the positioning block and the detecting circuit board are connected by bolts. [0006] Preferably, the sealing layer is an epoxy resin glue layer.
[0007] 优选的， 所述检测电路板上设有若干安装孔。 [0007] Preferably, the detecting circuit board is provided with a plurality of mounting holes.
发明的有益效果  Advantageous effects of the invention
有益效果  Beneficial effect
[0008] 采用以上技术方案的有益效果是： 本发明结构的检测氧气浓度的装置， 气体通 道与检测通道成十字交叉成型分布， 气体通道的一端幵设进气口， 另一端幵设 出气口， 气体通道与检测通道之间安装一端扩散通道， 样气在气体通道中流过 吋， 通过扩散通道流向检测通道中， 根据菲克定律， 高浓度气体向低浓度气体 扩散， 最后气体通道与检测通道中的气体浓度达到动态平衡， 在单次采样吋间 段内 （0.01s) ， 检测通道中氧分压可视为不变， 这些条件满足采样要求， 无需 较长的检测通道来满足测量要求， 降低成本， 同吋避免了现有检测技术的不良 影响， 使得采样数据变动较小， 保持一致性， 超声波收发传感器在样气处于动 态平衡状态， 检测通道中发射和接收超声波， 通过检测计算超声波传播的速度 ， 即可计算获得检测通道中氮氧混合气体的氧气的体积分数， 提高了检测精确 度。  [0008] The beneficial effects of the above technical solution are as follows: In the device for detecting oxygen concentration in the structure of the present invention, the gas passage and the detecting passage are formed by crisscrossing, and one end of the gas passage is provided with an air inlet, and the other end is provided with an air outlet. A diffusion channel is arranged between the gas channel and the detection channel, and the sample gas flows through the gas channel in the gas channel, and flows through the diffusion channel into the detection channel. According to Fick's law, the high concentration gas diffuses to the low concentration gas, and finally the gas channel and the detection channel The gas concentration reaches the dynamic balance. In the single sampling interval (0.01s), the oxygen partial pressure in the detection channel can be regarded as constant. These conditions meet the sampling requirements, and no longer detection channels are needed to meet the measurement requirements. Cost, the same avoids the adverse effects of the existing detection technology, so that the sampling data changes less, maintain consistency, the ultrasonic transceiver sensor is in the dynamic equilibrium state of the sample gas, the detection channel transmits and receives ultrasonic waves, and the ultrasonic wave propagation is detected by the detection. Speed, you can calculate the nitrogen and oxygen mixture in the detection channel. The volume fraction of oxygen in the gas increases the accuracy of the test.
对附图的简要说明  Brief description of the drawing
附图说明  DRAWINGS
[0009] 图 1是现有技术的检测氧气浓度的装置；  1 is a prior art apparatus for detecting oxygen concentration;
[0010] 图 2是本发明的结构示意图； 2 is a schematic structural view of the present invention;
[0011] 图 3是本发明的俯视图。 3 is a plan view of the present invention.
[0012] 其中， 1-检测电路板， 2-检测通道， 3-密封层， 4-超声波收发传感器， 5-气体通 道， 6-进气口， 7-出气口， 8-扩散通道， 9-安装孔， 10-定位块， 11-螺栓。  [0012] wherein, 1-detection circuit board, 2-detection channel, 3-sealing layer, 4-ultrasonic transceiver sensor, 5-gas channel, 6-inlet port, 7-outlet port, 8-diffusion channel, 9- Mounting holes, 10-positioning block, 11-bolt.
实施该发明的最佳实施例  BEST MODE FOR CARRYING OUT THE INVENTION
本发明的最佳实施方式  BEST MODE FOR CARRYING OUT THE INVENTION
[0013] 下面结合附图详细说明本发明的优选实施方式。 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0014] 图 2和图 3出示本发明的具体实施方式： 一种检测氧气浓度的装置， 包括检测电 路板 1， 所述检测电路板 1上设有检测通道 2， 所述检测通道 2与检测电路板 1可拆 卸连接， 所述检测通道 2的两端分别设有密封层 3， 所述检测电路板 1的两侧分别 设有超声波收发传感器 4， 所述超声波收发传感器 4的探头分别由密封层 3密封于 检测通道 2的两端， 所述检测通道 2的上方设有气体通道 5， 所述气体通道 5平行 与检测电路板 1并与检测通道 2交叉设置， 所述气体通道 5的一端设有进气口 6， 另一端设有出气口 7， 所述气体通道 5与检测通道 2之间设有扩散通道 8。 2 and 3 show a specific embodiment of the present invention: A device for detecting oxygen concentration, comprising a detection circuit board 1, wherein the detection circuit board 1 is provided with a detection channel 2, the detection channel 2 and detection Circuit board 1 is detachable The two ends of the detecting circuit board 1 are respectively provided with a sealing layer 3, and the ultrasonic transmitting and receiving sensors 4 are respectively disposed on the two sides of the detecting circuit board 1, and the probes of the ultrasonic transmitting and receiving sensor 4 are respectively sealed by the sealing layer 3 The two ends of the detection channel 2 are disposed above the detection channel 2, and the gas channel 5 is parallel to the detection circuit board 1 and intersects with the detection channel 2, and one end of the gas channel 5 is provided with an air inlet. The mouth 6 has an air outlet 7 at the other end, and a diffusion channel 8 is disposed between the gas passage 5 and the detecting passage 2.
本发明的实施方式 Embodiments of the invention
[0015] 本实施例中， 所述检测通道 2的两侧壁分别设有定位块 10， 所述定位块 10与检 测电路板 1通过螺栓 11连接， 通过定位块 10将检测通道 2安装在检测电路板 1上， 安装牢固， 稳定性好， 且拆卸便捷。  [0015] In this embodiment, the two side walls of the detecting channel 2 are respectively provided with positioning blocks 10, the positioning block 10 and the detecting circuit board 1 are connected by bolts 11, and the detecting channel 2 is installed and detected by the positioning block 10. On the circuit board 1, the installation is firm, the stability is good, and the disassembly is convenient.
[0016] 本实施例中， 所述密封层 3为环氧树脂胶水层， 环氧树脂胶水密封效果好， 且 价格低廉， 降低成本。  [0016] In the embodiment, the sealing layer 3 is an epoxy resin glue layer, and the epoxy resin glue sealing effect is good, and the price is low, and the cost is reduced.
[0017] 本实施例中， 所述检测电路板 1上设有若干安装孔 9， 便于整个装置的安装。  [0017] In this embodiment, the detecting circuit board 1 is provided with a plurality of mounting holes 9 for facilitating the installation of the entire device.
工业实用性  Industrial applicability
[0018] 基于上述， 本发明结构的检测氧气浓度的装置， 气体通道 5与检测通道 2成十字 交叉成型分布， 气体通道 5的一端幵设进气口 6， 另一端幵设出气口 7， 气体通道 5与检测通道 2之间安装一端扩散通道 8， 样气在气体通道 5中流过吋， 通过扩散 通道 8流向检测通道 2中， 根据菲克定律， 高浓度气体向低浓度气体扩散， 最后 气体通道 5与检测通道 2中的气体浓度达到动态平衡， 由于被测量气体通过扩散 的方式进入并均匀分布在检测通道 2中， 无过多的动态气流干扰， 数据波动小， 降低测量误差， 提高了测量精度， 同吋， 可以在较短的检测通道 2中进行数据采 样， 无需较长的检测通道来满足测量要求， 降低成本。  [0018] Based on the above, the apparatus for detecting oxygen concentration in the structure of the present invention, the gas passage 5 and the detecting passage 2 are formed in a crisscross pattern, and the gas passage 5 has an air inlet 6 at one end and a gas outlet 7 at the other end. A diffusion channel 8 is installed between the channel 5 and the detection channel 2, and the sample gas flows through the gas channel 5 and flows through the diffusion channel 8 to the detection channel 2. According to Fick's law, the high concentration gas diffuses to the low concentration gas, and finally the gas The gas concentration in the channel 5 and the detection channel 2 is dynamically balanced. Since the gas to be measured enters through the diffusion mode and is evenly distributed in the detection channel 2, there is no excessive dynamic airflow interference, the data fluctuation is small, the measurement error is reduced, and the measurement is improved. With the measurement accuracy, the data can be sampled in the shorter detection channel 2, eliminating the need for longer detection channels to meet the measurement requirements and reducing costs.
[0019] 以上所述的仅是本发明的优选实施方式， 应当指出， 对于本领域的普通技术人 员来说， 在不脱离本发明创造构思的前提下， 还可以做出若干变形和改进， 这 些都属于本发明的保护范围。  [0019] The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept. All fall within the scope of protection of the present invention.

Claims

权利要求书 Claim
[权利要求 1] 一种检测氧气浓度的装置， 包括检测电路板， 其特征在于： 所述检测 电路板上设有检测通道， 所述检测通道与检测电路板可拆卸连接， 所 述检测通道的两端分别设有密封层， 所述检测电路板的两侧分别设有 超声波收发传感器， 所述超声波收发传感器的探头分别由密封层密封 于检测通道的两端， 所述检测通道的上方设有气体通道， 所述气体通 道平行于检测电路板并与检测通道交叉设置， 所述气体通道的一端设 有进气口， 另一端设有出气口， 所述气体通道与检测通道之间设有扩 散通道。  [Claim 1] A device for detecting oxygen concentration, comprising a detecting circuit board, wherein: the detecting circuit board is provided with a detecting channel, the detecting channel is detachably connected to the detecting circuit board, and the detecting channel is The two ends of the detecting circuit board are respectively provided with ultrasonic transmitting and receiving sensors, and the probes of the ultrasonic transmitting and receiving sensors are respectively sealed by sealing layers on both ends of the detecting channel, and the detecting channel is provided above a gas passage, the gas passage is parallel to the detecting circuit board and intersecting the detecting passage, the gas passage has one end with an air inlet, and the other end is provided with an air outlet, and the gas passage and the detecting channel are provided with a diffusion aisle.
[权利要求 2] 根据权利要求 1所述的检测氧气浓度的装置， 其特征在于： 所述检测 通道的两侧壁分别设有定位块， 所述定位块与检测电路板通过螺栓连  [Claim 2] The apparatus for detecting oxygen concentration according to claim 1, wherein: the two side walls of the detecting channel are respectively provided with positioning blocks, and the positioning block and the detecting circuit board are bolted
[权利要求 3] 根据权利要求 1所述的检测氧气浓度的装置， 其特征在于： 所述密封 层为环氧树脂胶水层。 [Claim 3] The apparatus for detecting oxygen concentration according to claim 1, wherein the sealing layer is an epoxy resin glue layer.
[权利要求 4] 根据权利要求 1所述的检测氧气浓度的装置， 其特征在于： 所述检测 电路板上设有若干安装孔。  [Claim 4] The apparatus for detecting oxygen concentration according to claim 1, wherein: the detecting circuit board is provided with a plurality of mounting holes.
PCT/CN2016/095622 2015-12-11 2016-08-17 Apparatus for detecting oxygen concentration WO2017096943A1 (en)

Applications Claiming Priority (2)

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CN201510923830.6A CN105403619A (en) 2015-12-11 2015-12-11 Device for detecting oxygen concentration
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CN111103352B (en) * 2020-01-03 2024-06-18 苏州杰纳汽车零部件有限公司 Assembled sealed urea sensor
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