CN212646728U - An optical fiber measurement probe and a two-dimensional velocity measurement device for solid particles - Google Patents
An optical fiber measurement probe and a two-dimensional velocity measurement device for solid particles Download PDFInfo
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- CN212646728U CN212646728U CN202021341609.2U CN202021341609U CN212646728U CN 212646728 U CN212646728 U CN 212646728U CN 202021341609 U CN202021341609 U CN 202021341609U CN 212646728 U CN212646728 U CN 212646728U
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Abstract
本实用新型提供了一种光纤测量探头及固体颗粒二维速度测量装置，所述光纤测量探头装置包括设置于光纤长管中的至少4个接收光纤束以及设置于光纤长管中心的1个发射光纤束；所述发射光纤束的中心轴线与光纤长管的中心轴线重合；所述至少4个接收光纤束中每个接收光纤束的中心轴线与光纤长管的中心轴线的距离相等；所述至少4个接收光纤束中任意两个相邻接收光纤束的中心轴线的距离相等。本实用新型提供的光纤测量探头利用至少4个接收光纤束同时进行信号接收，两个相对的接收光纤束形成光纤束对，在测量平面上的颗粒在测量区间内的单向运动信号皆可被捕捉，由此可得颗粒在二维平面内的速度分布。
The utility model provides an optical fiber measurement probe and a solid particle two-dimensional velocity measurement device. The optical fiber measurement probe device comprises at least four receiving optical fiber bundles arranged in a long optical fiber tube and one transmitting optical fiber bundle arranged in the center of the optical fiber long tube. an optical fiber bundle; the central axis of the transmitting optical fiber bundle coincides with the central axis of the optical fiber long tube; the distance between the central axis of each receiving optical fiber bundle in the at least four receiving optical fiber bundles and the central axis of the optical fiber long tube is equal; the The distance between the central axes of any two adjacent receiving optical fiber bundles in the at least four receiving optical fiber bundles is equal. The optical fiber measurement probe provided by the utility model utilizes at least four receiving optical fiber bundles to simultaneously receive signals, two opposite receiving optical fiber bundles form a fiber bundle pair, and the unidirectional motion signals of the particles on the measurement plane in the measurement interval can be detected. capture, from which the velocity distribution of the particles in the two-dimensional plane can be obtained.
Description
Technical Field
The utility model belongs to the technical field of measure, a measuring probe is related to, especially, relate to an optical fiber measuring probe and solid particle two dimension speed measuring device.
Background
Gas-solid or liquid-solid fluidization plays an important role in industrial production, is closely related to energy conservation, consumption reduction and development of new technological processes in the production process, and is widely applied to industries such as chemical industry, petroleum industry, pharmaceutical industry, agriculture industry, food industry, power generation industry and the like.
The liquid-solid fluidized bed takes liquid as a fluidized medium, is closely related to ion exchange, absorption and catalytic cracking processes in a production process, and is applied to the fields of wet metallurgy, mineral separation, chemical industry, petrochemical industry, biochemical industry, ion exchange, polymerization reaction, absorption and the like. Therefore, the flow characteristics in the fluidized bed reactor are always the research focus, and the accurate measurement of the solid particle speed in the fluidized bed has important significance for the research of the flow behavior, the axial and radial mixing, the heat transfer and the mass transfer characteristics in the fluidized bed.
CN 209673599U discloses a probe for measuring the speed of solid particles in gas-solid or liquid-solid two-phase flow, which comprises a probe rod and at least two probe head tubes, wherein each probe head tube is inserted into the probe rod from one end of the probe rod; one end of the base is connected with the other end of the probe rod, and the other end of the base is provided with a light source coupling port and signal coupling ports which correspond to the probe head tubes one by one; the optical fiber bundles correspond to the probe head tubes one by one, one end of each optical fiber bundle is wrapped in the probe head tube, the transmitting optical fiber of each optical fiber bundle is led out from the base through the light source coupling port and is irradiated by the same light source, and the receiving light of each optical fiber bundle is led out from the base through the corresponding signal coupling port. The speed measuring probe leads the emission optical fiber of each optical fiber bundle out of the base through the same light source coupling port and is irradiated by the same light source, and compared with the mode that a plurality of light sources are adopted, the speed measuring probe simplifies the adjusting process.
CN 202403890U discloses a device for measuring the particle velocity and the concentration spatial distribution of dense two-phase flow, which comprises an image acquisition end and an image processing unit; the image acquisition end is used for shooting a motion video of particles in the fluidization device and comprises a laser source, an optical fiber endoscope, a high-speed industrial camera, an image acquisition card and a computer, and a sheet-type laser beam provided by the laser source determines a measurement area in the fluidization device; the fiber optic endoscope photographs the determined measurement area as an optical lens, and the lens of the fiber optic endoscope is parallel to the laser beam plane with the distance therebetween kept at 10 mm. The measuring device is capable of performing multi-view measurements within a flow field.
CN 110907314A discloses a fiber cluster probe device and a method for multi-parameter measurement of high-temperature combustion particles, which comprises a probe part and a detection part. Laser emitted by the laser source is transmitted through the optical fiber and irradiates the high-temperature particles to be detected, and then backward scattering light signals of the particles are transmitted to the photoelectric detector through the optical fiber, so that parameters such as two-dimensional movement speed and concentration of the particles are detected. And (3) turning off the laser light source, receiving the spectrum signal of the particles in the combustion state by the spectrum detector, and measuring the temperature parameter of the high-temperature particles.
However, the above-mentioned measuring apparatus can only measure the instantaneous particle movement in the end face, and the requirement for the measuring end is very high, for example, the position of the measuring point must be at the point of uniform distribution of the particles, the moving direction of the measured particles must be known and substantially consistent, and the like, and thus, the measuring apparatus is far from meeting the requirements of practical experimental environment and research.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an optical fiber measuring probe and solid particle two-dimensional velocity measuring device, especially provide an optical fiber measuring probe and solid particle two-dimensional velocity measuring device that is arranged in measuring liquid solid two-phase flow or gas solid two-phase flow solid particle two-dimensional velocity. The utility model provides an optical fiber measuring probe can be arranged in measuring the two-dimensional speed that the granule flows in gas-solid two-phase flow or the liquid-solid two-phase flow, moreover optical fiber measuring probe does not receive the influence of factors such as external electromagnetic field, can work under normal atmospheric temperature or higher temperature ambient temperature, has little, the high just advantage with low costs of precision to the flow field interference.
To achieve the purpose, the utility model adopts the following technical proposal:
in a first aspect, the present invention provides an optical fiber measuring probe, the optical fiber measuring probe comprises at least 4 receiving optical fiber bundles arranged in an optical fiber long tube and 1 transmitting optical fiber bundle arranged in the center of the optical fiber long tube; the central axis of the emission optical fiber bundle is superposed with the central axis of the optical fiber long tube; the distance between the central axis of each receiving optical fiber bundle in the at least 4 receiving optical fiber bundles and the central axis of the optical fiber long tube is equal; the distance between the central axes of any two adjacent receiving optical fiber bundles in the at least 4 receiving optical fiber bundles is equal.
The number of the receiving optical fiber bundles in the optical fiber measuring probe device is at least 4, for example, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15, 20 or 30, but is not limited to the enumerated values, and other unrecited values in the numerical range are also applicable.
The end faces of the at least 4 receiving optical fiber bundles are in the same plane.
In order to facilitate the fiber measurement probe to measure the velocity of solid particles in a two-dimensional plane, the number of receiving fiber bundles is preferably an even number.
The receiving optical fiber bundle and the transmitting optical fiber bundle of the utility model are arranged in an optical fiber long tube, and the optical fiber long tube is a conventional metal tube in the field; in order to further improve the packaging quality, the receiving optical fiber bundle and the transmitting optical fiber bundle are respectively and independently packaged in a metal tube in the optical fiber long tube.
Preferably, the ends of the receiving optical fiber bundle and the transmitting optical fiber bundle on the detection side are encapsulated by wear-resistant transparent materials.
The utility model adopts the wear-resistant transparent material to package the end surfaces of the receiving optical fiber bundle and the transmitting optical fiber bundle, thereby prolonging the service life of the optical fiber measuring probe in the high abrasion measuring environment; the abrasion resistant transparent material is an abrasion resistant transparent material conventional in the art, including but not limited to glass, preferably abrasion resistant quartz glass.
Preferably, the end of the receiving fiber bundle is fixed by glue; the end of the emission fiber bundle is fixed by glue.
When the receiving optical fiber bundle and the transmitting optical fiber bundle are directly packaged in the optical fiber long tube, the receiving optical fiber bundle and the transmitting optical fiber bundle are fixed with the optical fiber long tube by glue, and the optical fiber bundle in the optical fiber long tube is completely suspended or partially suspended, so that the influence of expansion caused by heat and contraction caused by cold of the filler on optical fiber signal transmission due to environmental change is avoided.
When the receiving optical fiber bundle and the transmitting optical fiber bundle are respectively and independently packaged in the metal tube in the optical fiber long tube, two ends of the optical fiber bundle in the metal tube are bonded and fixed with the metal tube by glue, and the optical fiber bundle in the metal tube is completely suspended or partially suspended, so that the influence of expansion caused by heat and contraction caused by cold of the filler on optical fiber signal transmission is avoided.
Glue includes resin glue and/or inorganic glue, and the field technical personnel can carry out the rational selection to the kind of glue according to fiber measurement probe's service environment, makes the tip that the optic fibre restrainted can be fixed to glue under service environment.
Preferably, the outer surface of the optical fiber long tube is smooth.
Preferably, the distance between the central axes of any two adjacent receiving optical fiber bundles in the at least 4 receiving optical fiber bundles is larger than the diameter of the measured single solid particle and is in the same order of magnitude as the size of the solid particle agglomerate.
Preferably, the distance between the central axes of any two adjacent receiving optical fiber bundles in the at least 4 receiving optical fiber bundles is 1-20mm, such as 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 12mm, 15mm, 16mm, 18mm or 20mm, but not limited to the enumerated values, and other unrecited values in the numerical range are also applicable.
In a second aspect, the present invention provides a two-dimensional velocity measuring apparatus for solid particles comprising the optical fiber measuring probe according to the first aspect.
Preferably, the solid particle two-dimensional speed measuring device comprises a power supply, a signal processing circuit, a light detection component, a light source component and a fiber optic measuring probe; the emission optical fiber bundle in the optical fiber measuring probe is connected with the light source component; a receiving optical fiber bundle in the optical fiber measuring probe is connected with the optical detection component; the light detection component is connected with the signal processing circuit.
The signal processing circuit is conventional in the art and includes, but is not limited to, an a/D converter and a computer associated therewith.
The light source detection component is a light source detection component conventional in the art, and includes but is not limited to a photodiode and/or a phototriode; the light source components are conventional in the art and include, but are not limited to, light emitting diodes and/or light emitting diodes.
The optical detection component receives optical signals reflected by the moving particles, converts the optical signals into electric signals, transmits the electric signals to the signal processing circuit, and transmits the electric signals to the computer for processing through the A/D converter.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides an optical fiber measuring probe utilizes 4 at least receiving fiber bundles to carry out signal reception simultaneously, and two relative receiving fiber bundles form the fiber bundle right, and the one-way motion signal of granule in measuring interval on the measuring plane all can be caught, can obtain the velocity distribution of granule in the two-dimensional plane from this.
Drawings
Fig. 1 is a schematic structural diagram of the optical fiber measurement probe provided by the present invention.
Wherein: 1, an optical fiber long tube; 2-1, a first receiving fiber bundle; 2-2, a second receiving fiber bundle; 2-3, a third receiving fiber bundle; 2-4, a fourth receive fiber bundle; 2-5, a fifth receiving fiber bundle; 2-6, a sixth receiving fiber bundle; and 3, emitting the optical fiber bundle.
Detailed Description
It is to be understood that in the description of the present invention, the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for the purpose of convenience and simplicity of 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 construed as limiting the present invention.
It should be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" and "connected" in the description of the present invention are to be construed broadly, and may for example be fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
As a preferred technical solution of the optical fiber measuring probe of the present invention, the optical fiber measuring probe comprises at least 4 receiving optical fiber bundles disposed in the optical fiber long tube 1 and 1 transmitting optical fiber bundle 3 disposed in the center of the optical fiber long tube 1; the central axis of the emission optical fiber bundle 3 is superposed with the central axis of the optical fiber long tube 1; the central axis of each receiving optical fiber bundle in the at least 4 receiving optical fiber bundles is equidistant from the central axis of the long optical fiber tube 1; the distances between the central axes of any two adjacent receiving optical fiber bundles in the at least 4 receiving optical fiber bundles are equal and are 1-20 mm; also, the number of the receiving fiber bundles is even.
The receiving optical fiber bundle and the transmitting optical fiber bundle 3 are respectively and independently packaged in a metal tube; one ends of the receiving optical fiber bundle and the transmitting optical fiber bundle 3, which are positioned at the detection side, are encapsulated by glass; the optical fiber bundle in the metal tube is fixed by epoxy resin, and the optical fiber bundle in the metal tube is suspended in the air; the outer surface of the optical fiber long tube 1 is smooth and antistatic.
The distance between the central axes of any two adjacent receiving optical fiber bundles in the at least 4 receiving optical fiber bundles is larger than the diameter of the measured single solid particle and is in the same order of magnitude as the size of the solid particle agglomerate.
Example 1
The embodiment provides an optical fiber measuring probe, which comprises 4 receiving optical fiber bundles arranged in an optical fiber long tube 1 and 1 transmitting optical fiber bundle 3 arranged in the center of the optical fiber long tube 1; the central axis of the emission optical fiber bundle 3 is superposed with the central axis of the optical fiber long tube 1; the distance between the central axis of each receiving optical fiber bundle in the 4 receiving optical fiber bundles and the central axis of the optical fiber long tube 1 is equal; the distance between the central axes of any two adjacent receiving optical fiber bundles in the 4 receiving optical fiber bundles is equal and is 1 mm; the end faces of the 4 receiving optical fiber bundles are in the same plane.
One ends of the receiving optical fiber bundle and the transmitting optical fiber bundle 3, which are positioned at the detection side, are encapsulated by glass; the two ends of the receiving optical fiber bundle positioned in the optical fiber long tube 1 are fixed by epoxy resin glue; the two ends of the emission optical fiber bundle 3 in the optical fiber long tube 1 are fixed by epoxy resin glue.
The outer surface of the optical fiber long tube 1 is smooth and antistatic.
Example 2
The present embodiment provides an optical fiber measurement probe, a schematic structural diagram of which is shown in fig. 1, and the optical fiber measurement probe includes 6 receiving optical fiber bundles disposed in an optical fiber long tube 1 and 1 transmitting optical fiber bundle 3 disposed in the center of the optical fiber long tube 1; the central axis of the emission optical fiber bundle 3 is superposed with the central axis of the optical fiber long tube 1; the distance between the central axis of each receiving optical fiber bundle in the 6 receiving optical fiber bundles and the central axis of the optical fiber long tube 1 is equal; the distance between the central axes of any two adjacent receiving optical fiber bundles in the 6 receiving optical fiber bundles is equal and is 20 mm; the end faces of the 6 receiving optical fiber bundles are in the same plane.
The receiving optical fiber bundle and the transmitting optical fiber bundle 3 are respectively and independently packaged in a metal tube; one ends of the receiving optical fiber bundle and the transmitting optical fiber bundle 3, which are positioned at the detection side, are encapsulated by glass; the two ends of the optical fiber bundle in the metal tube are fixed by inorganic glue; the outer surface of the optical fiber long tube 1 is smooth and antistatic.
The 6 receiving optical fiber bundles are respectively a first receiving optical fiber bundle 2-1, a second receiving optical fiber bundle 2-2, a third receiving optical fiber bundle 2-3, a fourth receiving optical fiber bundle 2-4, a fifth receiving optical fiber bundle 2-5 and a sixth receiving optical fiber bundle 2-6.
Example 3
The embodiment provides an optical fiber measuring probe, which comprises 8 receiving optical fiber bundles arranged in an optical fiber long tube 1 and 1 transmitting optical fiber bundle 3 arranged in the center of the optical fiber long tube 1; the central axis of the emission optical fiber bundle 3 is superposed with the central axis of the optical fiber long tube 1; the distance between the central axis of each receiving optical fiber bundle in the 8 receiving optical fiber bundles and the central axis of the optical fiber long tube 1 is equal; the distances between the central axes of any two adjacent receiving optical fiber bundles in the 8 receiving optical fiber bundles are equal and are 10 mm; the end faces of the 8 receiving optical fiber bundles are in the same plane.
The receiving optical fiber bundle and the transmitting optical fiber bundle 3 are respectively and independently packaged in a metal tube; one ends of the receiving optical fiber bundle and the transmitting optical fiber bundle 3, which are positioned at the detection side, are encapsulated by glass; the two ends of the optical fiber bundle in the metal tube are fixed by epoxy resin glue, and the optical fiber bundle in the metal tube is suspended; the outer surface of the optical fiber long tube 1 is smooth and antistatic.
Because of space limitation, the utility model takes embodiment 2 as an example to explain the application of the method of the optical fiber measuring probe of the utility model:
setting a solid particle to move in a plane where a central axis of a first receiving optical fiber bundle 2-1 and a central axis of a second receiving optical fiber bundle 2-2 are located, when the solid particle to be detected moves linearly through the second receiving optical fiber bundle 2-2, a transmitting optical fiber bundle 3 transmits light emitted by a light source part, the light irradiates the surface of the opaque moving particle, the reflected light is transmitted to a light detection part through the second receiving optical fiber bundle 2-2, and a peak signal is generated through a signal processing circuit; when the solid particles to be detected move linearly to pass through the first receiving optical fiber bundle 2-1, the transmitting optical fiber bundle 3 transmits light rays emitted by the light source part, the light rays irradiate the surface of the opaque moving particles, the reflected light rays are transmitted to the light detection part through the first receiving optical fiber bundle 2-1, and another peak value signal is generated through the signal processing circuit.
The moving speed V of the moving particles to be measured in the directions of the first receiving optical fiber bundle 2-1 and the second receiving optical fiber bundle 2-2 can be obtained according to the time interval delta T for generating two peak signals and the distance L between the first receiving optical fiber bundle 2-1 and the second receiving optical fiber bundle 2-21. Similarly, the moving speed V in the directions of the third receiving fiber bundle 2-3 and the fourth receiving fiber bundle 2-4 can be obtained2(ii) a And a moving speed V in the directions of the fifth receiving fiber bundle 2-5 and the sixth receiving fiber bundle 2-63. Therefore, the speed size and the motion distribution statistical data of the fixed particles at the end face of the optical fiber measuring probe can be obtained.
To sum up, the utility model provides an optical fiber measuring probe utilizes 4 at least receiving fiber bundles to carry out signal reception simultaneously, and two relative receiving fiber bundles form the fiber bundle right, and the one-way motion signal of granule in measuring interval on the measuring plane all can be caught, can obtain the velocity distribution of granule in the two-dimensional plane from this. The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021341609.2U CN212646728U (en) | 2020-07-09 | 2020-07-09 | An optical fiber measurement probe and a two-dimensional velocity measurement device for solid particles |
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| CN202021341609.2U CN212646728U (en) | 2020-07-09 | 2020-07-09 | An optical fiber measurement probe and a two-dimensional velocity measurement device for solid particles |
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| CN212646728U true CN212646728U (en) | 2021-03-02 |
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