CN209927674U - Flow type droplet light measuring device - Google Patents
Flow type droplet light measuring device Download PDFInfo
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- CN209927674U CN209927674U CN201920321488.6U CN201920321488U CN209927674U CN 209927674 U CN209927674 U CN 209927674U CN 201920321488 U CN201920321488 U CN 201920321488U CN 209927674 U CN209927674 U CN 209927674U
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- 230000008878 coupling Effects 0.000 abstract description 4
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- 230000006872 improvement Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
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- 239000002245 particle Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
The utility model relates to a STREAMING liquid droplet light measuring device for measure the liquid droplet in the fluid passage, including the laser light source that is used for producing laser that sets gradually, be used for carrying out the spectroscope of beam splitting to the laser that comes from laser light source, be located fluid passage one side is used for propagating and makes the laser after the beam splitting penetrate fluid passage's optic fibre, is located the fluid passage opposite side and is used for receiving the laser that optic fibre jetted out and turn into photosignal photosensitive surface circuit board, one end and photosensitive surface circuit board be connected in order to gather and come from the data acquisition card of the signal of light photosensitive surface circuit board, data acquisition card's data output mouth links to each other with the computer, is equipped with two fiber detection point at a distance of certain distance at least on the fluid passage, and the figure. The utility model discloses owing to adopt above-mentioned double coupling photoresistance measuring device and mode, data acquisition is fast, reaches 20Hz, and the computer hard disk of depositing can guarantee long-time record.
Description
Technical Field
The utility model belongs to the electron field especially relates to a stream mode liquid droplet light measuring device.
Background
Methods for detecting the size of the tiny droplets include stationary photographical analysis (sweeping field) and fast camera streaming photography (sweeping point). The former is limited by the size of a visual field, liquid drops need to be distributed in a single layer, and the subsequent statistical analysis is complicated; the latter is limited by the memory, generally only records the condition of tens of seconds to tens of seconds, and in addition, the shutter speed is limited, and the oil-water interface is fuzzy and difficult to distinguish when the flow rate is high. Patent CN201410242630 realizes the counting of solid particles flowing through by a photoresistive device, but the device and the method cannot obtain the information about the size and the velocity distribution of the flowing-through which we are concerned.
Disclosure of Invention
An object of the utility model is to provide a STREAMING liquid droplet light measuring device can realize quick double coupling photoresistance measuring device.
The technical implementation scheme of the utility model is: the flow type droplet light measuring device is used for measuring droplets in a fluid channel and comprises a laser light source for generating laser, a light splitter for splitting the laser from the laser light source, an optical fiber which is positioned on one side of the fluid channel and is used for transmitting and enabling the split laser to penetrate through the fluid channel, a photosurface circuit board which is positioned on the other side of the fluid channel and is used for receiving the laser emitted by the optical fiber and converting an optical signal into an electrical signal, and a data acquisition card, wherein one end of the data acquisition card is connected with the photosurface circuit board so as to acquire the electrical signal from the photosurface circuit board, a data output port of the data acquisition card is connected with a computer, at least two optical fiber detection points which are at a certain distance are arranged on the fluid channel, and the number of the optical fiber.
Based on the above-mentioned purpose, the utility model discloses a further improvement scheme is: the device also comprises an infrared detection card, wherein the infrared detection card is used for aligning the laser emitted by the optical fiber with the fluid channel so as to enable the laser to be vertically emitted through the fluid channel.
Based on the above-mentioned purpose, the utility model discloses a further improvement scheme is: the fluid channel is a long straight pipeline with a circular or rectangular cross section and a characteristic dimension of submicron or micron.
Based on the above-mentioned purpose, the utility model discloses a further improvement scheme is: the photosensitive surface circuit board comprises a plurality of photosensitive surface receiving elements, NBC connectors and a power supply, the number of the photosensitive surface receiving elements is the same as that of the optical fibers, the photosensitive surface receiving elements and the optical fibers are located on the same light path, each photosensitive surface receiving element is connected to the NBC connector, the power supply is connected to two ends of the photosensitive surface receiving elements and the NBC connectors which are connected in series, and the output end of the NBC connector is an electric signal output end of the photosensitive surface circuit board.
Based on the above-mentioned purpose, the utility model discloses a further improvement scheme is: the photosensitive surface circuit board and the data acquisition card are integrated in the same box, an optical fiber support and an optical fiber buckle are further arranged on the box, an optical fiber hole is formed in the optical fiber support, the optical fiber buckle is arranged in the optical fiber hole, and the optical fiber support is erected on the box and used for aligning the optical fiber with a photosensitive surface receiving element in the box.
Advantageous effects
The utility model discloses owing to adopt above-mentioned double coupling photoresistance measuring device, data acquisition is fast, reaches 20Hz, and the computer hard disk of depositing can guarantee to record for a long time.
Drawings
Fig. 1 is an external view of a light detection integration apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of an alignment bracket according to an embodiment of the present invention;
fig. 3 is a schematic view of an optical fiber buckle according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a photosurface circuit board according to an embodiment of the invention;
fig. 5 is a schematic view of an optical flow measurement device according to an embodiment of the present invention;
FIG. 6 is a flow chart of the operation of a second optical measurement method according to an embodiment of the present invention;
fig. 7(a) is a spatial arrangement diagram of a second optical fiber detection according to an embodiment of the present invention;
FIG. 7(b) is a diagram illustrating the shapes of two flow patterns and electrical signals according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a droplet and an external phase of a two-pulse electrical signal according to an embodiment of the present invention;
fig. 9 is a schematic view of a micro-channel tube of an embodiment of the present invention.
Detailed Description
In order to make the principle and advantages of the present invention become clearer, the following description will proceed with further detailed description in conjunction with the accompanying drawings and specific embodiments. In the present embodiment, the specific embodiments described are only for explaining the present invention, and are not used to limit the present invention.
Example one
As shown in fig. 1 and 5, the flow-type droplet light measuring device is used for measuring droplets in a fluid channel 7, and includes a laser light source 1 for generating laser light, a beam splitter 2 for splitting the laser light from the laser light source, an optical fiber 3 located on one side of the fluid channel 7 and used for transmitting and making the split laser light penetrate through the fluid channel 7, a photosurface circuit board 4 located on the other side of the fluid channel 7 and used for receiving the laser light emitted from the optical fiber 3 and converting an optical signal into an electrical signal, and a data acquisition card 5 having one end connected to the photosurface circuit board 4 to acquire the electrical signal from the photosurface circuit board 4, the data output port of the data acquisition card 5 is connected with a computer 6, the fluid channel 7 is provided with at least two optical fiber detection points which are at a certain distance, and the number of the optical fibers 3 is the same as that of the optical fiber detection points. The photosurface circuit board 4 converts the optical signals into electrical signals, guides the electrical signals into the data acquisition card 5, and stores the electrical signals into the computer 6 connected with the data output port. The flow droplet light measuring device further comprises an infrared detector card for aligning the laser light emitted by the optical fibre 3 with the flow channel 7 so that the laser light is emitted perpendicularly through the flow channel 7. The fluid channel is a long straight pipeline with a circular or rectangular cross section and a characteristic dimension of submicron or micron. The photosurface circuit board and the data acquisition card are integrated in the same box, an optical fiber support and an optical fiber buckle are further arranged on the box, as shown in fig. 2 and fig. 3, an optical fiber hole is formed in the optical fiber support, the optical fiber buckle is arranged in the optical fiber hole, and the optical fiber support is erected on the box and used for aligning the optical fiber with a photosurface receiving element 8 in the box. As shown in fig. 4, the photosurface circuit board includes a plurality of photosurface receiving elements 8, NBC connectors 9 and a power supply, the number of the photosurface receiving elements 8 is the same as that of the optical fibers and is located on the same optical path, each photosurface receiving element 8 is respectively connected to the NBC Connector 9(Bayonet Nut Connector, which is a Connector for coaxial cable), the power supply is connected to two ends of the photosurface receiving elements 8 and the NBC connectors 9 which are connected in series, and the output end of the NBC Connector 9 is an electrical signal output end of the photosurface circuit board.
The overall appearance of our utility model product is as shown in fig. 1, and the light detection device is integrated as a portable unit for the first time. A photosensitive surface circuit board for detecting the change of optical signals and a data acquisition card for storing the converted electrical signals are integrated in a box, and the box is provided with a power supply. An upstream laser light source and a light splitter are additionally arranged, an optical fiber support is added by a line cutting technology and is shown in figure 2, two pairs of optical fiber detection ports are arranged on the optical fiber buckle, and the light detection equipment can simultaneously detect the information of the liquid drops flowing through the two fluid channels. When the optical fiber support is clamped on the black box, the optical fiber support is just aligned with a photosensitive element in the black box, the operation is portable and simple, and the optical fiber support is easy to popularize to other engineering application occasions.
Example two
As shown in fig. 5 and 6, in the flow-type droplet optical measurement method, laser generated by a laser source enters an optical fiber after being split by a splitter, as shown in fig. 7(a) and 9, the laser in the optical fiber is emitted and then enters a photosurface circuit board through a fluid channel through which droplets flow, at least two optical fiber detection points are arranged on the fluid channel, the photosurface circuit board converts received optical signals of the laser into electrical signals, a data acquisition card acquires the electrical signals of the photosurface circuit board and stores a signal file of the electrical signals changing along with time into a computer for analysis, and each optical fiber channel stores one electrical signal file to realize flow-type droplet optical measurement.
The measurement flow of the utility model device is shown in figure 6: near infrared light generated by the semiconductor laser light source is divided into four paths through the optical splitter, and the four paths are transmitted in optical fibers respectively. Unlike CN201410242630, we arrange two optical fiber detection points on the fluid channel closely, as shown in fig. 7 (a). The laser light exits the fiber through an infrared detection card (VRC2, https:// www.thorlabs.com/newgrouppage9.cfm, both the horizontal and vertical lengths are about 0.512 inches. ) Aligning it with the fluid channel. The vertically projected laser light is received by the photosensitive surface element of the photosensitive surface circuit board on the other side of the fluid channel and converts the optical signal into an electrical signal. The data output port directly records the electric signal in a computer hard disk through a data acquisition card, and each optical fiber channel can store an electric signal file. A common computer can satisfy hundreds of hours of continuous recording.
The size of all the droplets sequentially flowing through the optical fiber in the period can be calculated from the electrical signal by self-programming in a Visual BASIC environment. The unique program computing thought of the method is as follows: the flow of droplets through the detection port will have a specific waveform, see fig. 7(b), with a threshold value selected to distinguish between the two phases. The time difference of a liquid drop flowing through the two coupling optical fibers can be known, and the instantaneous speed of the liquid drop can be calculated by combining the distance s between the two optical fibers; the size of the droplet is calculated from the instantaneous flow rate, the time elapsed for the waveform and the channel configuration.
1. Measurement of droplet content:
the transmittance of light passing through the water drops is high, and the voltage value is large after the response of the photodiode; in the oil phase and the external phase, the light transmittance is low, and the voltage value is small after the response of the photodiode; the average of the maximum and minimum voltage values is used as a threshold to distinguish between the two phases, as shown in fig. 8.
The occupancy rates (alpha, eta) of the liquid drop and the oil phase are respectively calculated by utilizing the voltage signals obtained by the optical fiber detection:
wherein T is the detection time, TGiIs the detection time, T, of the detected dropletLiIs the time of detection of the oil phase.
2. Measurement of individual droplet velocities:
as shown in FIG. 9, (two optical fiber sensors are arranged along the direction of the flow channel tube at an interval of s cm, s is 1cm in the prototype)
One droplet has a unique waveform, and the time difference between two optical fibers is T ', so that the instantaneous speed V is S/T'. S is the spacing between two fibers arranged along the direction of the fluid channel, and T' is the time difference between the droplets passing through the two fibers.
3. Calculation of droplet length:
as shown in FIG. 8, when a threshold value is established to distinguish the drop from the external phase, a waveform of each drop can be obtained, and the time occupied by the peak on the x-axis is the time t when the drop passes through the optical fiber monitoring pointdrop. The length of the drop is equal to the instantaneous velocity and tdropThe product of (a).
Since the voltage at which the droplet passes through the fiber optic probe is low, the droplet length is obtained by multiplying the average velocity of the droplet by the duration of the low level (i.e., the time the droplet passes through the fiber optic probe).
It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.
Claims (5)
1. A flow-through droplet light measuring device for measuring a droplet in a fluid channel, characterized by: including the laser light source that is used for producing laser, the spectroscope that is used for carrying out the beam split to the laser that comes from laser light source that sets gradually, be located fluid passage one side is used for propagating and makes the laser after the beam split penetrate fluid passage's optic fibre, is located the fluid passage opposite side is used for receiving the laser that optic fibre jetted out and turn into photosurface circuit board, one end of the signal of telecommunication with photosignal conversion, photosurface circuit board connect in order to gather to come from the data acquisition card of the signal of telecommunication of photosurface circuit board, data acquisition card's data output mouth links to each other with the computer, be equipped with two at least fiber detection points at a distance from on the fluid passage, the figure of optic fibre with the.
2. A streaming droplet light measuring device according to claim 1, wherein: the device also comprises an infrared detection card, wherein the infrared detection card is used for aligning the laser emitted by the optical fiber with the fluid channel so as to enable the laser to be vertically emitted through the fluid channel.
3. A streaming droplet light measuring device according to claim 2, wherein: the fluid channel is a long straight pipeline with a circular or rectangular cross section and a characteristic dimension of submicron or micron.
4. A streaming droplet light measuring device according to claim 3, wherein: the photosensitive surface circuit board comprises a plurality of photosensitive surface receiving elements, NBC connectors and a power supply, the number of the photosensitive surface receiving elements is the same as that of the optical fibers, the photosensitive surface receiving elements and the optical fibers are located on the same light path, each photosensitive surface receiving element is connected to the NBC connector, the power supply is connected to two ends of the photosensitive surface receiving elements and the NBC connectors which are connected in series, and the output end of the NBC connector is an electric signal output end of the photosensitive surface circuit board.
5. A streaming droplet light measurement device according to claim 4, wherein: the photosensitive surface circuit board and the data acquisition card are integrated in the same box, an optical fiber support and an optical fiber buckle are further arranged on the box, an optical fiber hole is formed in the optical fiber support, the optical fiber buckle is arranged in the optical fiber hole, and the optical fiber support is erected on the box and used for aligning the optical fiber with a photosensitive surface receiving element in the box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920321488.6U CN209927674U (en) | 2019-03-14 | 2019-03-14 | Flow type droplet light measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920321488.6U CN209927674U (en) | 2019-03-14 | 2019-03-14 | Flow type droplet light measuring device |
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| CN209927674U true CN209927674U (en) | 2020-01-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827877A (en) * | 2019-03-14 | 2019-05-31 | 张乐翔 | Streaming drop optical measurement instrument and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827877A (en) * | 2019-03-14 | 2019-05-31 | 张乐翔 | Streaming drop optical measurement instrument and method |
| CN109827877B (en) * | 2019-03-14 | 2024-06-18 | 北京昌科医学检验实验室有限公司 | Flow type liquid drop light measuring device and method |
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Effective date of registration: 20201021 Address after: 102200, 313, 314, 315, 3 / F, building 1, yard 1, energy East Road, Shahe Town, Changping District, Beijing Patentee after: Beijing Changke medical laboratory Co., Ltd Address before: 300110 Tianjin City, Nankai District Wei Jin Road No. 92 Patentee before: Zhang Lexiang |