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CN113030020A - Gas detection device in oil supply pipeline and vehicle with same - Google Patents

Gas detection device in oil supply pipeline and vehicle with same Download PDF

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Publication number
CN113030020A
CN113030020A CN201911350831.0A CN201911350831A CN113030020A CN 113030020 A CN113030020 A CN 113030020A CN 201911350831 A CN201911350831 A CN 201911350831A CN 113030020 A CN113030020 A CN 113030020A
Authority
CN
China
Prior art keywords
optical signal
oil supply
supply line
gas detection
detection device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911350831.0A
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Chinese (zh)
Inventor
初超
王世波
马子祥
王浩名
王海朋
王欣
孙文强
臧传庆
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Beiqi Foton Motor Co Ltd
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Beiqi Foton Motor Co Ltd
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Publication date
Application filed by Beiqi Foton Motor Co Ltd filed Critical Beiqi Foton Motor Co Ltd
Priority to CN201911350831.0A priority Critical patent/CN113030020A/en
Publication of CN113030020A publication Critical patent/CN113030020A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/41Refractivity; Phase-affecting properties, e.g. optical path length
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/01Arrangement of fuel conduits
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01Arrangements or apparatus for facilitating the optical investigation
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01Arrangements or apparatus for facilitating the optical investigation
    • G01N2021/0106General arrangement of respective parts
    • G01N2021/0112Apparatus in one mechanical, optical or electronic block

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Immunology (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Pathology (AREA)
  • Analytical Chemistry (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

The invention discloses a gas detection device in an oil supply pipeline and a vehicle with the same, wherein the gas detection device comprises: the method comprises the following steps: the optical signal transmitting end is positioned on one of the top wall and the bottom wall of the oil supply pipeline and is suitable for obliquely transmitting an optical signal; the optical signal trigger end is located on the other one of the top wall and the bottom wall of the oil supply pipeline, and when gas exists in the oil supply pipeline, a transmission path of the optical signal deflects to enable the state of the optical signal trigger end receiving the optical signal to change. Therefore, by utilizing the refraction effect of light, the change of the final irradiation position of the light is realized by the deviation of the incident angle of the light with a certain incident angle when the light passes through the boundary surface of two media, so that whether air exists in the oil supply pipeline or not is accurately and reliably detected, the detection precision is improved, a driver can be effectively informed, and the gas detection device is simple in structure and high in working stability.

Description

Gas detection device in oil supply pipeline and vehicle with same
Technical Field
The invention relates to the technical field of vehicles, in particular to a gas detection device in an oil supply pipeline and a vehicle with the gas detection device.
Background
In the related art, an engine supplies fuel through a fuel supply line, and a fuel line belongs to a vehicle fuel system. However, if air is mixed into the vehicle fuel system (i.e., in the fuel supply line), engine start-up difficulties, engine power starvation, engine malfunction, and even engine misfire can result.
In the prior art, no effective sensor or alarm device is available to prompt the driver whether air is mixed in the fuel system of the vehicle.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a gas detection device in an oil supply line, which can accurately detect whether air is present in the oil supply line, and which has a simple structure and high operation stability.
The invention further provides a vehicle, and the vehicle adopts the gas detection device in the oil supply pipeline.
A gas detection device in an oil supply line for a vehicle according to an embodiment of a first aspect of the present invention includes: the method comprises the following steps: the optical signal transmitting end is positioned on one of the top wall and the bottom wall of the oil supply pipeline and is suitable for obliquely transmitting an optical signal; the optical signal trigger end is located on the other one of the top wall and the bottom wall of the oil supply pipeline, and when gas exists in the oil supply pipeline, a transmission path of the optical signal deflects to enable the state of the optical signal trigger end receiving the optical signal to change.
According to the gas detection device provided by the embodiment of the invention, by utilizing the refraction effect of light, the change of the final irradiation position of the light is realized by the deviation of the incident angle of the light with a certain incident angle when the light passes through the boundary surface of two media, so that whether air exists in the oil supply pipeline is accurately and reliably detected, the detection precision is improved, a driver can be effectively informed, and the gas detection device is simple in structure and high in working stability.
According to some embodiments of the present invention, the optical signal triggering end is configured as an optical signal receiving end, and when gas exists in the oil supply pipeline, a transmission path of the optical signal is deflected and irradiates the optical signal receiving end; or
The optical signal trigger end is constructed as an optical signal receiving end, and when gas exists in the oil supply pipeline, a transmission path of the optical signal deflects and is far away from the optical signal receiving end.
Further, the optical signal emitting end is configured as a linear light source, and the optical signal triggering end is configured as a photoresistor.
In some embodiments, the light emitted from the light signal emitting end is monochromatic.
Furthermore, the incident angle of the optical signal transmitting end is alpha, the refractive index of the monochromatic light is a, the refractive index of the fuel oil in the oil supply pipeline is b, and the refraction angle of the light after passing through the gas and the fuel oil in sequence is calculated to be beta, wherein sin beta is a sin alpha/b.
Further, the length of the photoresistor is L, the distance from the top wall to the bottom wall is H, and L is sin β H.
Further, when being full of the fuel in the oil supply pipeline, the linear light source shines the position on the roof or the diapire of oil supply pipeline is the position of placing of photo resistance, photo resistance's one end is located place the position, photo resistance's the other end extends towards the light refraction direction.
In some embodiments, the width of the light dependent resistor is the same as the width of the line light source.
According to some embodiments of the invention, further comprising: the optical signal trigger end is connected with the optical signal trigger end, and the other end of the optical signal trigger end is connected with the controller through the plug connector.
A vehicle according to an embodiment of the second aspect of the invention includes: the gas detection apparatus described in the above embodiments.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of a gas detection apparatus according to an embodiment of the present invention;
FIG. 2 is another schematic view of a gas detection apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an operating state of a gas detection device according to an embodiment of the present invention (the light signal trigger terminal is not triggered);
FIG. 4 is a schematic diagram of another operating state of a gas detection device according to an embodiment of the present invention (the optical signal trigger terminal is triggered).
Reference numerals:
the gas detection device 100, the oil supply line 200,
the optical signal transmission device comprises an optical signal transmitting end 10, an optical signal triggering end 20, a signal wire harness 30, a plug 40 and a device body 50.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A gas detection apparatus 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 4.
As shown in fig. 1 and 2, a gas detecting apparatus 100 in an oil supply line 200 for a vehicle according to an embodiment of the present invention includes: the oil supply device comprises an optical signal emitting end 10 and an optical signal triggering end 20, wherein the optical signal emitting end 10 is positioned on one of the top wall and the bottom wall of the oil supply pipeline 200 and is suitable for obliquely emitting an optical signal; the optical signal trigger end 20 is located on the other of the top wall or the bottom wall of the oil supply pipeline 200, and when gas exists in the oil supply pipeline 200, the transmission path of the optical signal is deflected, so that the state of the optical signal trigger end 20 receiving the optical signal is changed.
Specifically, the gas detection device 100 of the present embodiment is disposed in the oil supply line 200, wherein the light signal emitting end 10 is disposed on one of a top wall or a top wall of the oil supply line 200 and is adapted to emit a light signal (i.e., light) having a certain angle (obtuse angle or acute angle) toward the bottom wall, and the light signal triggering end 20 is disposed on the other of the top wall or the bottom wall of the oil supply line 200 and is adapted to be triggered upon receiving the light signal or triggered after the interruption of the light signal.
In other words, in some embodiments, when there is no air in the oil supply line 200, the optical signal directly irradiates the optical signal trigger terminal 20, when there is air in the oil supply line 200, the optical signal refracts and deflects and cannot irradiate the optical signal trigger terminal 20, and when the optical signal does not irradiate the optical signal trigger terminal 20, the optical signal trigger terminal 20 is triggered, and it is determined that there is air in the oil supply line 200.
In other embodiments, when there is no air in the oil supply line 200, the optical signal cannot be applied to the optical signal trigger terminal 20, when there is air in the oil supply line 200, the optical signal is refracted and deflected to be applied to the optical signal trigger terminal 20, and when the optical signal is applied to the optical signal trigger terminal 20, the optical signal trigger terminal 20 is triggered, and it is determined that there is air in the oil supply line 200.
It is understood that the driver may be notified when the gas detection device 100 detects the presence of air in the oil supply line 200.
According to the gas detection device 100 of the embodiment of the invention, by utilizing the refraction effect of light, the change of the final irradiation position of the light is realized by the deviation of the incident angle of the light with a certain incident angle when the light passes through the boundary surface of two media, so as to accurately and reliably detect whether air exists in the oil supply pipeline 200, improve the detection precision, effectively inform a driver, and the gas detection device 100 has a simple structure and high working stability.
Here, it should be noted that, in some embodiments, the gas detection device 100 is directly formed in the oil supply line 200, and in other embodiments, the gas detection device 100 includes: the device body 50, both ends of the device body 50 cooperate with both ends of the oil supply pipeline 200, respectively.
As shown in fig. 3 and 4, the optical signal triggering terminal 20 is configured as an optical signal receiving terminal, and when gas exists in the oil supply line 200, the transmission path of the optical signal is deflected and irradiated to the optical signal receiving terminal. As mentioned above, in the specific embodiment shown in fig. 3 and 4, the optical signal initiation terminal 20 is configured as an optical signal receiving terminal adapted to be initiated when an optical signal impinges on the optical signal receiving terminal. The technical effect is the same as that of the above embodiment in which the optical signal receiving end is triggered when receiving the optical signal, and is not described herein again.
Of course, the optical signal triggering end 20 can be configured as an optical signal receiving end, and the transmission path of the optical signal is deflected and away from the optical signal receiving end when gas exists in the oil supply line 200. That is to say, when there is no air in the oil supply pipeline 200, the optical signal irradiates the optical signal receiving end, when there is air in the oil supply pipeline 200, the optical signal is refracted and deflected, and then is far away from the optical signal receiving end, and when the optical signal is far away from the optical signal receiving end, the optical signal receiving end is triggered, and it is determined that there is air in the oil supply pipeline.
It is understood that the optical signal emitting terminal 10 is configured as a linear light source, and the optical signal triggering terminal 20 is configured as a photo resistor. Therefore, when the light signal irradiates the photoresistor, the resistance of the photoresistor is rapidly reduced, and then the current passing through the photoresistor is increased, the voltage added at the two ends of the photoresistor is reduced, and the photoresistor can be specifically represented as corresponding earth electric signals, so that the air existing in the oil supply pipeline 200 is obtained through the change of the electric signals.
Preferably, the light emitted from the light signal emitting end 10 is monochromatic light. It should be noted that, the wavelengths of the monochromatic lights of different colors are different, and the photoresistor can realize a significant change of its own resistance under the illumination of the specific wavelength, and the refractive index of the monochromatic light is stable, which can improve the detection accuracy of the gas detection device 100 of the present embodiment.
As shown in fig. 4, the incident angle of the optical signal emitting end 10 is α, the refractive index of the monochromatic light is a, and the refractive index of the fuel in the oil supply pipeline 200 is b, so as to calculate the refraction angle of the light passing through the gas and the fuel in sequence as β, where sin β is a × sin α/b; the length of the photoresistor is L, the distance from the top wall to the bottom wall is H, and L is sin beta H; when the fuel oil is filled in the fuel supply pipeline 200, the position of the linear light source irradiating the top wall or the bottom wall of the fuel supply pipeline 200 is the placing position of the photoresistor, one end of the photoresistor is located at the placing position, and the other end of the photoresistor extends towards the light refraction direction.
In other words, the arrangement position, the length and the like of the photoresistor are all limited by the incident angle, the refraction angle and the distance from the top wall to the bottom wall, and then through the formula, the photoresistor is arranged at a reasonable position, the length of the photoresistor is more reasonable, and on the premise of improving the detection precision, the cost of the gas detection device 100 can be effectively reduced.
It should be noted that the positions of the two ends of the photoresistor on the top wall or the bottom wall are limited by two limit values, one is the light signal irradiation position when the fuel oil supply pipeline 200 is filled with fuel oil; the second is the light signal irradiation position when the oil supply line 200 is filled with air. Its length L ═ sin β H.
Further, the width of the photo-resistor is identical to the width of the linear light source. Therefore, the light signal irradiated on the photoresistor is linear, the triggering stability of the photoresistor can be improved, and the photoresistor can still be triggered on the premise that partial light of the linear light source is shielded.
As shown in fig. 1, the gas detection apparatus 100 further includes: the signal wire harness 30 and the controller, one end of the signal wire harness 30 is electrically connected with the optical signal trigger terminal 20, the other end of the signal wire harness 30 is electrically connected with the controller through the plug 40, and the controller is suitable for giving an alarm after the optical signal trigger terminal 20 receives the signal.
A vehicle according to an embodiment of the present invention includes: the gas detection apparatus 100 in the above embodiment.
According to the vehicle of the embodiment of the invention, the gas detection device 100 is adopted, so that a driver can know in advance when air exists in the oil supply pipeline 200, the driver can deal with the air in advance, the vehicle cannot be started when the vehicle needs to be used is avoided, and the use convenience and the safety of the vehicle are improved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A gas detection device (100) in a fuel supply line (200) for a vehicle, comprising:
an optical signal emitting end (10), the optical signal emitting end (10) being located on one of a top wall and a bottom wall of the oil supply pipeline (200) and adapted to emit an optical signal obliquely;
an optical signal trigger terminal (20), the optical signal trigger terminal (20) is located on the other of the top wall and the bottom wall of the oil supply pipeline (200), when gas exists in the oil supply pipeline (200), the transmission path of the optical signal deflects to change the state of the optical signal trigger terminal (20) receiving the optical signal.
2. A gas detecting device (100) in a fuel supply line (200) for a vehicle according to claim 1, wherein the optical signal triggering end (20) is configured as an optical signal receiving end to which a transmission path of the optical signal is deflected and irradiated when a gas is present in the fuel supply line (200); or
The optical signal trigger end (20) is configured as an optical signal receiving end, and when gas exists in the oil supply pipeline (200), the transmission path of the optical signal deflects and is far away from the optical signal receiving end.
3. The gas detection device (100) in a fuel supply line (200) for a vehicle according to claim 2, wherein the light signal emitting terminal (10) is configured as a linear light source, and the light signal triggering terminal (20) is configured as a photoresistor.
4. The gas detecting device (100) in the oil supply line (200) for the vehicle as claimed in claim 3, wherein the light emitted from the light signal emitting end (10) is monochromatic light.
5. The gas detection device (100) in the oil supply line (200) for the vehicle according to claim 3, wherein the incident angle of the light signal emitting end (10) is α, the refractive index of the monochromatic light is a, and the refractive index of the fuel oil in the oil supply line (200) is b, so as to calculate the refraction angle of the light passing through the gas and the fuel oil in sequence as β, wherein sin β is a sin α/b.
6. The gas detection device (100) in an oil supply line (200) for a vehicle according to claim 5, wherein the photoresistor has a length L, and the distance from the top wall to the bottom wall is H, and L is sin β H.
7. The gas detection device (100) for use in a vehicle supply line (200) according to claim 6, wherein the position where the linear light source is irradiated onto the top wall or the bottom wall of the supply line (200) when the supply line (200) is filled with fuel is a placement position of the photo resistor, one end of the photo resistor is placed at the placement position, and the other end of the photo resistor extends toward the light refraction direction.
8. The gas detection device (100) in the oil supply line (200) for the vehicle according to claim 2, wherein a width of the photo-resistor coincides with a width of the linear light source.
9. The gas detection device (100) in an oil supply line (200) for a vehicle according to any one of claims 1 to 8, further comprising: the signal wire harness comprises a signal wire harness (30) and a controller, wherein one end of the signal wire harness (30) is electrically connected with the optical signal trigger end (20), the other end of the signal wire harness (30) is electrically connected with the controller through a plug connector (40), and the controller is suitable for giving an alarm after the optical signal trigger end (20) receives a signal.
10. A vehicle, characterized by comprising: the gas detection apparatus (100) of any one of claims 1-9.
CN201911350831.0A 2019-12-24 2019-12-24 Gas detection device in oil supply pipeline and vehicle with same Pending CN113030020A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911350831.0A CN113030020A (en) 2019-12-24 2019-12-24 Gas detection device in oil supply pipeline and vehicle with same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911350831.0A CN113030020A (en) 2019-12-24 2019-12-24 Gas detection device in oil supply pipeline and vehicle with same

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CN113030020A true CN113030020A (en) 2021-06-25

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2349558Y (en) * 1998-12-25 1999-11-17 王晓庆 Transparent liquid tank level and height gauge
CN1715866A (en) * 2001-04-16 2006-01-04 泽维克斯公司 Optical bubble detection system
CN101303251A (en) * 2008-06-17 2008-11-12 杨振福 Automobile fuel capacity photoelectric sensing display
CN102565063A (en) * 2010-12-31 2012-07-11 深圳迈瑞生物医疗电子股份有限公司 Reagent detection device, system, method, blood analysis device
CN105547411A (en) * 2015-12-15 2016-05-04 北汽福田汽车股份有限公司 Flight-vehicle fuel measuring device, fuel tank, flight vehicle and fuel measuring method
CN205844179U (en) * 2016-04-29 2016-12-28 深圳迈瑞生物医疗电子股份有限公司 Extracorporeal diagnostic instrument and bubble detection device thereof
CN107145263A (en) * 2011-06-07 2017-09-08 上海科斗电子科技有限公司 Using the touch-screen system of a wordline shape laser light source
CN107290353A (en) * 2016-03-30 2017-10-24 中芯国际集成电路制造(上海)有限公司 The bubble detection device and detection method of photoresistance pipeline
CN107806569A (en) * 2017-11-09 2018-03-16 河南中烟工业有限责任公司 A kind of tobacco equipment liquid line bubble warning device
CN110269969A (en) * 2019-06-26 2019-09-24 北京健帆医疗设备有限公司 Leak blood detection method, leakage blood detection device and computer readable storage medium

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2349558Y (en) * 1998-12-25 1999-11-17 王晓庆 Transparent liquid tank level and height gauge
CN1715866A (en) * 2001-04-16 2006-01-04 泽维克斯公司 Optical bubble detection system
CN101303251A (en) * 2008-06-17 2008-11-12 杨振福 Automobile fuel capacity photoelectric sensing display
CN102565063A (en) * 2010-12-31 2012-07-11 深圳迈瑞生物医疗电子股份有限公司 Reagent detection device, system, method, blood analysis device
CN107145263A (en) * 2011-06-07 2017-09-08 上海科斗电子科技有限公司 Using the touch-screen system of a wordline shape laser light source
CN105547411A (en) * 2015-12-15 2016-05-04 北汽福田汽车股份有限公司 Flight-vehicle fuel measuring device, fuel tank, flight vehicle and fuel measuring method
CN107290353A (en) * 2016-03-30 2017-10-24 中芯国际集成电路制造(上海)有限公司 The bubble detection device and detection method of photoresistance pipeline
CN205844179U (en) * 2016-04-29 2016-12-28 深圳迈瑞生物医疗电子股份有限公司 Extracorporeal diagnostic instrument and bubble detection device thereof
CN107806569A (en) * 2017-11-09 2018-03-16 河南中烟工业有限责任公司 A kind of tobacco equipment liquid line bubble warning device
CN110269969A (en) * 2019-06-26 2019-09-24 北京健帆医疗设备有限公司 Leak blood detection method, leakage blood detection device and computer readable storage medium

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Application publication date: 20210625

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