CN110132905B - Dynamic measuring system - Google Patents
Dynamic measuring system Download PDFInfo
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- CN110132905B CN110132905B CN201910455953.XA CN201910455953A CN110132905B CN 110132905 B CN110132905 B CN 110132905B CN 201910455953 A CN201910455953 A CN 201910455953A CN 110132905 B CN110132905 B CN 110132905B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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Abstract
The invention provides a dynamic measurement system. This liquid pool device includes: the liquid pool comprises a liquid pool body and a liquid outlet, wherein the liquid pool body is provided with a liquid inlet hole and a liquid outlet hole, and the top surface of the liquid pool body is also provided with a flow groove communicated with the liquid inlet hole and the liquid outlet hole; the face window lens is fixedly arranged in the liquid pool body and covered on the flow groove, and the face window lens is used for allowing laser of the sum frequency vibration spectrometer to pass through; liquid enters through the liquid inlet hole, flows through the flowing groove to be in contact with the lower surface of the face window lens, and flows out of the liquid outlet hole. The sum frequency vibration spectrum instrument projects laser to liquid flowing in the flowing groove through the face window lens, meanwhile, the liquid reflects the laser to the sum frequency vibration spectrum instrument through the face window lens, and the sum frequency vibration spectrum instrument collects and processes the reflected laser so as to realize rapid detection of the orientation and the structure of lubricating molecules of the flowing liquid and facilitate fluid characteristic research.
Description
Technical Field
The invention relates to the technical field of optical detection, in particular to a dynamic measurement system.
Background
And sum frequency vibration Spectroscopy (SFG) is a high-sensitivity surface spectroscopy detection means with surface selectivity, is used for detecting a submonolayer, has the advantages of high sensitivity, non-destructiveness, capability of detecting a buried interface and the like, and is widely used for characterization of various interfaces. Important information such as vibration spectrum, molecular orientation and the like of molecules on the surface and the interface can be acquired. The technology of sum frequency vibration spectroscopy is applied to tribology lubrication science, analyzes an ultra-smooth lubrication interface, researches the change process of interface molecules in the friction process, and compares the influence of the internal physical and chemical properties of different fluids. The sum frequency signal of the lubricating interface is measured, the structural change of the interface molecules in the lubricating process is directly reflected, the influence of the micro-dynamic behavior on the macro-lubricating property is researched by researching the interaction between the lubricating interface molecules and the molecules on the surface in the friction process, and the internal mechanism in the lubricating process is further disclosed. Optimizing the structure of the lubricant and friction system will provide experimental verification for the disclosure of the super-slip mechanism.
The research on the structure and the dynamics of liquid molecules on a solid interface is one of the very important basic scientific research contents. Studies have shown that the liquid at the solid interface is very different from the bulk phase architecture. Numerous scholars have also conducted extensive research and have made substantial progress with respect to interfacial composition and molecular organization. The composition and structure of the fluid adjacent to the surface can vary significantly compared to the bulk liquid phase. The sum frequency spectrum is not only a surface characterization means for efficiently acquiring the vibration spectrum of the surface molecules, but also can track the dynamic process of the surface molecules in real time and research the ultrafast dynamics of the surface and the interface. However, in most studies on solid-liquid interface chemistry at present, the liquid is also in a static state. Sum frequency vibration spectroscopy also has little to do with the detection of fluid properties in flow systems, and is not conducive to fluid property studies.
Disclosure of Invention
Therefore, it is necessary to provide a liquid pool device for a sum frequency vibration spectrometer and a dynamic measurement system thereof, which can realize rapid detection of the orientation and structure of lubricating molecules of flowing liquid, aiming at the problem that the detection of fluid characteristics cannot be realized at present.
The above purpose is realized by the following technical scheme:
a fluid cell apparatus for a sum frequency vibration spectroscopy instrument, comprising:
the liquid pool comprises a liquid pool body and a liquid outlet, wherein the liquid pool body is provided with a liquid inlet hole and a liquid outlet hole, and the top surface of the liquid pool body is also provided with a flow groove communicated with the liquid inlet hole and the liquid outlet hole; and
the face window lens is fixedly arranged in the liquid pool body and covered on the flow groove, and the face window lens is used for allowing laser of the sum frequency vibration spectrometer to pass through;
liquid enters through the liquid inlet hole, flows through the flowing groove to be in contact with the lower surface of the face window lens, and flows out of the liquid outlet hole.
In one embodiment, the liquid pool device further comprises a fixing member, and the fixing member is used for pressing the face window lens on the liquid pool body.
In one embodiment, the fixing member comprises an upper cover, the upper cover is arranged on the liquid pool body, the upper cover is provided with a containing cavity for containing the face window lens, and the upper cover presses the face window lens on the liquid pool body;
the upper cover is provided with a fastening hole for mounting a fastening piece, so that the upper cover is fixed on the liquid pool body;
the upper cover further has a replacement hole for replacing the fastening hole.
In one embodiment, the liquid pool device further comprises a sealing element, the top surface of the liquid pool body is further provided with an annular sealing groove, the sealing groove is located at the outer sides of the liquid inlet hole and the liquid outlet hole, and the sealing element is mounted on the sealing groove and is abutted to the lower surface of the face window lens.
In one embodiment, the upper cover is provided with a light-transmitting hole, and the light-transmitting hole at least partially corresponds to the flow groove and is used for allowing the laser to pass through and project to the flow groove;
the shape of the light hole is circular, polygonal or the combination shape of straight lines and arcs.
In one embodiment, the cross-sectional shape of the flow channel is a U-shape, a V-shape, a semi-circle, a straight splice, a curved splice, or a straight and curved splice.
In one embodiment, the liquid inlet hole comprises a horizontal inlet hole and a vertical inlet hole communicated with the horizontal inlet hole, and the vertical inlet hole is communicated with the flow groove;
the liquid outlet hole comprises a horizontal outlet hole and a vertical outlet hole communicated with the horizontal outlet hole, and the vertical outlet hole is communicated with the flow groove.
In one embodiment, the liquid tank body further comprises a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is partially installed in the liquid inlet hole, and the liquid outlet pipe is partially installed in the liquid outlet hole.
In one embodiment, one end of the liquid inlet pipe, which is far away from the liquid pool body, is provided with a first bulge part, and the first bulge part is used for connecting and limiting a pipeline for feeding liquid;
one end of the liquid outlet pipe, which is far away from the liquid pool body, is provided with a second protruding part, and the second protruding part is used for connecting and limiting a pipeline for liquid outlet.
In one embodiment, the liquid pool body is made of polytetrafluoroethylene.
A dynamic measurement system comprises an infusion part, a connecting pipe, a liquid storage container and a liquid pool device according to any one of the technical characteristics;
the liquid pool device is arranged on a sample table of the sum frequency vibration spectrum instrument and is fixed by a clamp of the sum frequency vibration spectrum instrument;
the connecting pipe is connected with the liquid inlet hole of the liquid tank body and the liquid outlet hole of the liquid tank body and the liquid storage container.
After the technical scheme is adopted, the invention at least has the following technical effects:
according to the liquid pool device for the sum frequency vibration spectrometer and the dynamic measurement system thereof, liquid enters from the liquid inlet hole of the liquid pool body and flows along the flow groove to enter the liquid outlet hole of the liquid pool body, and the liquid contacts with the lower surface of the face window lens in the flowing process of the liquid along the flow groove. In the flowing process of the liquid in the liquid pool body, the sum frequency vibration spectrum instrument projects laser to the liquid flowing in the flowing groove through the face window lens, meanwhile, the liquid reflects the laser to the sum frequency vibration spectrum instrument through the face window lens, and the sum frequency vibration spectrum instrument collects and processes the reflected laser so as to realize the rapid detection of the orientation and the structure of lubricating molecules of the flowing liquid and facilitate the research of fluid characteristics.
Drawings
FIG. 1 is a perspective view of a fluid bath apparatus according to one embodiment of the present invention;
FIG. 2 is a cross-sectional view of the fluid bath apparatus shown in FIG. 1;
FIG. 3 is a perspective view of a tank body of the tank apparatus shown in FIG. 1;
FIG. 4 is a perspective view of the upper cover of the fluid bath apparatus shown in FIG. 1.
Wherein:
100-a liquid bath device;
110-a liquid pool body;
111-liquid inlet hole;
112-liquid outlet holes;
113-a flow cell;
120-upper cover;
121-light hole;
122-fastening holes;
130-a face window lens;
140-a liquid inlet pipe;
150-liquid outlet pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the liquid pool device for sum frequency vibration spectroscopy and the dynamic measurement system thereof according to the present invention are further described in detail by embodiments and with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1-4, the present invention provides a fluid cell apparatus 100 for use in a sum frequency vibration spectroscopy instrument. The liquid cell apparatus 100 is mounted on a sample stage of a sum frequency vibration spectrometer for providing a flowing liquid. Thus, the detection of the sum frequency vibration spectrometer can realize the rapid detection of the orientation and the structure of the lubricating molecules of the flowing liquid in the liquid pool device 100, and is convenient for the research of the fluid characteristics.
In one embodiment, the liquid cell apparatus 100 of the sum frequency vibration spectroscopy instrument includes a liquid cell body 110 and a face lens 130. The liquid tank body 110 has a liquid inlet hole 111 and a liquid outlet hole 112, and the top surface of the liquid tank body 110 further has a flow groove 113 communicating the liquid inlet hole 111 and the liquid outlet hole 112. The face window lens 130 is fixedly installed on the liquid pool body 110 and covers the flow groove 113, and the face window lens 130 is used for the laser of the sum frequency vibration spectrometer to pass through. Liquid enters through the liquid inlet hole 111, flows through the flow groove 113 to contact the lower surface of the facial lens 130, and flows out through the liquid outlet hole 112.
The liquid pool body 110 is a main place where the liquid medium flows, and defines a space where the liquid flows, and meanwhile, the liquid pool body 110 can also facilitate the installation and fixation of the liquid pool device 100. The liquid tank 110 has a liquid inlet 111 and a liquid outlet 112 connected to the top surface. Optionally, the liquid inlet hole 111 and the liquid outlet hole 112 may be disposed on the same side or on different sides. Illustratively, the liquid inlet hole 111 and the liquid outlet hole 112 are disposed opposite to the liquid pool body 110. Of course, in other embodiments of the present invention, the included angle between the liquid inlet hole 111 and the liquid outlet hole 112 ranges from 45 ° to 180 °. Alternatively still, the shape of the liquid pool body 110 is not limited in principle and may be circular, elliptical, square, or the like. Illustratively, the fluid cell body 110 is circular in shape.
One end of the liquid inlet hole 111 is communicated with the side surface of the liquid pool body 110, and the other end thereof is communicated with the top of the liquid pool body 110. One end of the liquid outlet hole 112 is communicated with the side surface of the liquid pool body 110, and the other end is communicated with the top surface of the liquid pool body 110. The ends of the liquid inlet hole 111 and the liquid outlet hole 112 on the top surface are respectively communicated with the two ends of the flow groove 113. Thus, after entering the liquid tank body 110 from the liquid inlet hole 111, the liquid enters the flow groove 113 on the top surface of the liquid tank body 110 through the liquid inlet hole 111, and then flows out of the liquid tank body 110 through the liquid outlet hole 112.
Because the flowing liquid is in the flowing groove 113 on the top surface of the liquid pool body 110, after the face window lens 130 is mounted on the top surface of the liquid pool body 110, the bottom surface of the face window lens 130 can be covered on the top surface of the liquid pool body 110, so that the flowing groove 113 is sealed, the liquid in the flowing groove 113 is prevented from flowing to other positions on the top surface of the liquid pool body 110, and the face window lens 130 can be penetrated by the laser of the sum frequency vibration spectroscopy instrument. Thus, the liquid in the flowing groove 113 contacts with the bottom surface of the face window lens 130, the solid-liquid interface of the flowing liquid can be simulated, and the rapid detection of the orientation and the structure of the lubricating molecules of the flowing liquid can be realized.
Alternatively, the front lens 130 is a flat plate, and may be made of transparent glass, transparent plastic, or other transparent materials.
Illustratively, sum frequency vibrating spectroscopy instruments may emit laser light (e.g., visible and/or infrared light, etc.). The sum frequency vibration spectrometer may project laser light to the liquid pool apparatus 100, the laser light is projected into the liquid in the flow groove 113 after passing through the window lens 130, and the liquid reflects the laser light, so that the reflected laser light is received by the sum frequency vibration spectrometer after passing through the window lens 130. Then, the sum frequency vibration spectrum instrument can process and analyze the received laser to obtain various parameters of the flowing liquid, and the quick detection of the orientation and the structure of the lubricating molecules of the flowing liquid is realized. The sum frequency vibration spectrometer is an existing device, and the structure and the working principle of the sum frequency vibration spectrometer are not repeated.
In one embodiment, the fluid reservoir apparatus 100 further includes a fixing member for pressing the window lens 130 against the fluid reservoir body 110. The fixing member can achieve reliable fixing of the visor lens 130. It should be noted that the liquid in the flow channel 113 will have pressure to lift the face lens 130, which will cause the liquid to flow in a turbulent manner. The fixing member can reliably fix the face lens 130 on the top of the liquid pool body 110, so as to ensure that the face lens 130 reliably seals the flow groove 113 and avoid the liquid in the flow groove 113 from flowing disorderly.
Alternatively, the fixing member may be a fixing clamp, by which the window lens 130 may be clamped and fixed to the liquid pool tank 110. In this embodiment, the fixing member includes an upper cover 120, the upper cover 120 is disposed on the liquid tank 110, the upper cover 120 has a receiving cavity for receiving the face lens 130, and the face lens 130 is pressed by the upper cover 120 on the liquid tank 110. After the upper cover 120 is covered on the liquid tank body 110, the face window lens 130 is located between the upper cover 120 and the liquid tank body 110, the bottom surface of the face window lens 130 is abutted against the top surface of the liquid tank body 110, and the rest of the face window lens 130 is abutted against the inner wall of the upper cover 120. Thus, the upper cover 120 can reliably fix the window lens 130 to the liquid pool body 110. Of course, in other embodiments of the invention, the securing member may be other structures that enable the securing of the visor lens 130.
In one embodiment, the upper cover 120 has fastening holes 122 for mounting fasteners, such that the upper cover 120 is fixed to the fluid reservoir body 110. The fastening member can be installed in the liquid tank body 110 through the fastening hole 122 of the upper cover 120, so as to fix the upper cover 120 to the liquid tank body 110, and further to realize reliable fixation of the face window lens 130. Illustratively, the fasteners are screws and the fastening holes 122 are threaded holes. And, the number of the fastening holes 122 is plural, and the plurality of fastening holes 122 are uniformly distributed in the upper cover 120. Further, the upper cover 120 also has a replacement hole for replacing the fastening hole 122. In order to prevent the fastening hole 122 from being failed due to repeated disassembly and assembly, a replacement hole is formed on the circumferential side of the fastening hole 122, and the upper cover 120 is reliably fixed.
In one embodiment, the fluid reservoir body 110 is made of ptfe. After the liquid tank body 110 is made of polytetrafluoroethylene, the liquid tank body 110 has the characteristics of acid resistance, alkali resistance and the like, and the liquid tank body 110 is almost not used for all organic solvents, so that any chemical reaction can be prevented, and the service performance of the liquid tank body 110 is ensured. Optionally, the upper cover 120 is also made of teflon. Thus, the upper cap 120 also has the same performance as the liquid tank body 110.
In an embodiment, the liquid pool apparatus 100 further includes a sealing member, the top surface of the liquid pool body 110 further has an annular sealing groove located outside the liquid inlet hole 111 and the liquid outlet hole 112, and the sealing member is mounted on the sealing groove and abuts against the lower surface of the window lens 130. The sealing member is used to achieve a seal between the face lens 130 and the fluid cell body 110, further preventing fluid in the flow channel 113 from leaking. It should be noted that the sealing groove is located outside the liquid inlet hole 111 and the liquid outlet hole 112 on the top surface, and after the sealing member is installed in the sealing groove, the liquid is confined to the area inside the sealing member, so as to prevent the liquid from flowing out of the liquid pool apparatus 100.
Illustratively, the seal is a seal ring. After the sealing ring is arranged in the sealing groove, the sealing ring is guaranteed to be compacted in the sealing groove, and no air is left in the sealing groove. The facial lens 130 is then loaded, and the facial lens 130 needs to be cleaned, such as by ultrasonic cleaning, deionized water, etc., before being loaded, to ensure that no organic residue remains on the facial lens 130. And then the upper cover 120 is installed on the liquid pool body 110.
In one embodiment, the upper cover 120 is formed with a light hole 121, and the light hole 121 at least partially corresponds to the flow groove 113 for allowing the laser to pass through and project to the flow groove 113. The light hole 121 is disposed through and communicates with the receiving cavity of the upper cover 120. Thus, the laser of the sum frequency vibration spectrometer can be projected to the face window lens 130 through the light transmission hole 121. It is understood that the light-transmitting holes 121 may correspond to the flow grooves 113 entirely or may correspond to the flow grooves 113 partially. Illustratively, the light transmissive holes 121 all correspond to the flow slots 113. Meanwhile, the operator can observe the flow of the liquid in the flow groove 113 through the light-transmitting hole 121.
In one embodiment, the shape of the light-transmitting hole 121 is circular, polygonal, or a combination of straight and curved lines. It is understood that the shape of the light transmission hole 121 is not limited in principle as long as the flow channel 113 can be exposed. In this embodiment, the light-transmitting hole 121 is an oblong hole.
In one embodiment, the cross-sectional shape of the flow channel 113 is U-shaped, V-shaped, semicircular, straight splice, curved splice, or straight and curved splice. The sectional shape of the flow groove 113 is not limited in principle as long as it can flow a liquid. Illustratively, the cross-sectional shape of the flow groove 113 is V-shaped.
Alternatively, the liquid inlet hole 111 may be a linear hole, a curved hole, or a splicing hole. In one embodiment, the liquid inlet hole 111 and the liquid outlet hole 112 are spliced holes. Specifically, the liquid inlet hole 111 includes a horizontal inlet hole and a vertical inlet hole communicated with the horizontal inlet hole, and the vertical inlet hole is communicated with the flow channel 113. The exit apertures 112 include a horizontal exit aperture and a vertical exit aperture in communication with the horizontal exit aperture, the vertical exit aperture in communication with the flow channel 113. That is, the liquid inlet hole 111 and the liquid outlet hole 112 each include a horizontal channel and a vertical channel, and the liquid delivery is realized by the combination of the horizontal channel and the vertical channel.
In one embodiment, the liquid tank 110 further includes a liquid inlet pipe 140 and a liquid outlet pipe 150, the liquid inlet pipe 140 is partially installed in the liquid inlet hole 111, and the liquid outlet pipe 150 is partially installed in the liquid outlet hole 112. The liquid inlet pipe 140 and the liquid outlet pipe 150 are installed in the corresponding channels, which facilitates the installation of the pipes. One end of the liquid inlet pipe 140 is installed in the liquid inlet hole 111, and the other end is exposed out of the liquid tank body 110, and one end of the liquid outlet pipe 150 is installed in the liquid outlet hole 112, and the other end is exposed out of the liquid tank body 110.
In an embodiment, an end of the liquid inlet pipe 140 away from the liquid pool body 110 has a first protrusion for connecting and limiting a pipeline for inlet liquid. One end of the liquid outlet pipe 150 far away from the liquid pool body 110 is provided with a second protruding part, and the second protruding part is used for connecting and limiting a pipeline for liquid outlet. The first protrusion on the liquid inlet pipe 140 is used for clamping a liquid inlet pipe, and the second protrusion on the liquid outlet pipe 150 is used for clamping a liquid outlet pipe. Therefore, the pipelines can be fastened at the end parts of the liquid outlet pipe 150 and the liquid inlet pipe 140, the sealing effect is guaranteed, and leakage is avoided.
The fluid desired for the experiment enters inlet aperture 111 from inlet tube 140 and flows into flow channel 113, where it contacts the lower surface of the facepiece lens 130, then enters outlet aperture 112 and exits through outlet tube 150. In the process that the liquid flows in the flow groove 113, the laser of the sum frequency vibration spectrometer is projected at the interface between the face window lens 130 and the liquid through the light hole 121 of the upper cover 120, and the laser is reflected by the liquid, so that the sum frequency vibration spectrometer receives the reflected laser and processes and analyzes the reflected laser, the parameters of the liquid are obtained, and the rapid detection of the orientation and the structure of the lubricating molecules of the flowing liquid is realized.
The liquid pool device 100 of the invention adopts polytetrafluoroethylene materials, can not react with flowing liquid, can not pollute the liquid, and can realize real-time and in-situ measurement of the orientation and the structure of lubricating molecules of the flowing liquid. Moreover, the liquid pool device 100 of the invention can be arranged on a sample platform of a sum frequency vibration spectrum instrument, all parts are standard parts, and the liquid pool device is easy to replace and has wide application range. Meanwhile, the liquid pool device 100 is simple to operate, convenient to use and low in cost.
The invention also provides a dynamic measurement system, which comprises an infusion part, a connecting pipe, a liquid storage container and the liquid pool device 100 in the embodiment. The liquid pool device 100 is installed on a sample stage of the sum frequency vibration spectrometer and is fixed by a clamp of the sum frequency vibration spectrometer. The connecting pipe connects the liquid inlet 111 of the liquid tank body 110 with the liquid infusion member, and the connecting pipe also connects the liquid outlet 112 of the liquid tank body 110 with the liquid storage container.
In the experiment, the liquid tank body 110 was cleaned, and a sealing member was installed in the sealing groove of the liquid tank body 110 to ensure compaction without air remaining. Then, the facial lens 130 is loaded, and the facial lens 130 is cleaned by using grass house and deionized water before being loaded, so as to ensure that the facial lens 130 has no organic residue. The upper cover 120 is then installed and fastened to the liquid pool body 110 with fasteners. The liquid inlet hole 111 of the liquid pool body 110 is connected with a connecting pipe, the other end of the connecting pipe is connected with a transfusion part, the liquid outlet hole 112 of the liquid pool body 110 is connected with a connecting pipe, and the connecting pipe is connected with a liquid storage container. Finally, the liquid pool body 110 is arranged on a sample stage of the sum frequency vibration spectrometer and is fixed by a clamp of the sum frequency vibration spectrometer. The position of the sample stage is adjusted to ensure that the laser can be incident on the interface between the face window lens 130 and the liquid in the flow channel 113 through the light-transmitting hole 121 of the upper cover 120.
Alternatively, the connecting pipe is a pipe in the above embodiments, and may be a hose. Illustratively, the connecting tube is a silicone tube. The infusion member is an infusion pump and provides power for the delivery of the liquid so that the liquid can flow along the liquid inlet hole 111, the flow groove 113 and the liquid outlet hole 112. Optionally, the infusion member comprises a micro-syringe pump and a control pump. The control pump can control the flow rate of the liquid by controlling the speed at which the pump propels the micro-syringe pump. Therefore, the liquid can be stably switched in the horizontal channel and the vertical channel, and smooth flowing is ensured. Further, the liquid is injected into the liquid pool body 110 by using the infusion piece, and the flow rate ranges from 0.001 muL/min to 102 muL/min. Before use, the liquid needs to be checked for leakage. Optionally, the reservoir comprises a closed but unsealed beaker under atmospheric conditions.
After the liquid pool device 100 is matched with the liquid infusion part, the connecting pipe and the liquid storage container, the dynamic measurement system can convey fluid media, emit laser through a sum frequency vibration spectrometer and project the laser to the interface between liquid in the flow groove 113 and the face window lens 130, so that the lubricating molecule orientation and the structure of the flowing liquid can be rapidly detected, and the fluid characteristic research is facilitated.
The technical features of the embodiments described above can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A dynamic measurement system, comprising: the device comprises a transfusion part, a connecting pipe, a liquid storage container and a liquid pool device for the sum frequency vibration spectrometer;
the liquid pool device is arranged on a sample stage of the sum frequency vibration spectrum instrument and is fixed by a clamp of the sum frequency vibration spectrum instrument, wherein the liquid pool device comprises: the liquid pool comprises a liquid pool body and a liquid outlet, wherein the liquid pool body is provided with a liquid inlet hole and a liquid outlet hole, and the top surface of the liquid pool body is also provided with a flow groove communicated with the liquid inlet hole and the liquid outlet hole;
the connecting pipe is connected with the infusion part and the liquid inlet hole of the liquid pool body, and the connecting pipe is also connected with the liquid outlet hole of the liquid pool body and the liquid storage container;
the liquid pool device further comprises: the face window lens is fixedly arranged in the liquid pool body and covers the flow groove, and is used for allowing laser of the sum frequency vibration spectrometer and the laser reflected by liquid in the liquid pool body to pass through;
the fixing piece is used for pressing the face window lens on the liquid pool body, the fixing piece comprises an upper cover, the upper cover is covered on the liquid pool body, the upper cover is provided with an accommodating cavity for accommodating the face window lens, and the upper cover presses the face window lens on the liquid pool body;
liquid enters through the liquid inlet hole, flows through the flow groove to be in contact with the lower surface of the face window lens and flows out of the liquid outlet hole, in the flowing process of the liquid in the flow groove, laser of the sum frequency vibration spectrum instrument is projected to the interface of the face window lens and the liquid and is reflected to the sum frequency vibration spectrum instrument through the liquid, and the sum frequency vibration spectrum instrument processes and analyzes the received laser to detect the orientation and the structure of lubricating molecules of the flowing liquid.
2. The dynamic measurement system of claim 1,
the upper cover is provided with a fastening hole for mounting a fastening piece, so that the upper cover is fixed on the liquid pool body;
the upper cover further has a replacement hole for replacing the fastening hole.
3. The dynamic measurement system of claim 2, wherein the liquid cell device further comprises a sealing member, the top surface of the liquid cell body further has an annular sealing groove located outside the liquid inlet hole and the liquid outlet hole, and the sealing member is mounted on the sealing groove and abuts against the lower surface of the face window lens.
4. The dynamic measurement system of claim 2, wherein the upper cover has a light hole, the light hole at least partially corresponds to the flow groove, and the light hole is used for allowing the laser to pass through and project to the flow groove;
the shape of the light hole is circular, polygonal or the combination shape of straight lines and arcs.
5. The dynamic measurement system of any one of claims 1 to 4, wherein the cross-sectional shape of the flow channel is U-shaped, V-shaped, semicircular, straight-line splice, curved splice, or straight and curved splice.
6. The dynamic measurement system of any one of claims 1 to 4, wherein the liquid inlet hole comprises a horizontal inlet hole and a vertical inlet hole communicated with the horizontal inlet hole, the vertical inlet hole being communicated with the flow cell;
the liquid outlet hole comprises a horizontal outlet hole and a vertical outlet hole communicated with the horizontal outlet hole, and the vertical outlet hole is communicated with the flow groove.
7. The dynamic measurement system of any one of claims 1 to 4, wherein the liquid cell body further comprises a liquid inlet pipe partially mounted to the liquid inlet hole and a liquid outlet pipe partially mounted to the liquid outlet hole.
8. The dynamic measurement system of claim 7, wherein an end of the liquid inlet pipe away from the liquid pool body is provided with a first protrusion for connecting and limiting a pipeline for inlet liquid;
one end of the liquid outlet pipe, which is far away from the liquid pool body, is provided with a second protruding part, and the second protruding part is used for connecting and limiting a pipeline for liquid outlet.
9. The dynamic measurement system of any one of claims 1 to 4, wherein the liquid cell body is made of polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910455953.XA CN110132905B (en) | 2019-05-29 | 2019-05-29 | Dynamic measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910455953.XA CN110132905B (en) | 2019-05-29 | 2019-05-29 | Dynamic measuring system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110132905A CN110132905A (en) | 2019-08-16 |
| CN110132905B true CN110132905B (en) | 2021-03-16 |
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| US11733144B2 (en) | 2020-12-14 | 2023-08-22 | Caterpillar Inc. | Convertible housing assembly for a particle sensor |
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