Molecular behavior detection device in lubricating film

Abstract

The invention relates to a molecular behavior detection device in a lubricating film. The device comprises a supporting table, a light-emitting assembly and a signal detection assembly. The supporting table is used for supporting a solid sample; the light-emitting assembly is used for emitting a first light source towards a solid sample so as to reflect a first light source signal at a preset focus of an interface formed between the solid sample and a preset lubricating film; the signal detection assembly is arranged on one side of the supporting table and used for receiving the first light source signal and confirming molecular characteristics at different positions in the preset lubricating film according to the first light source signal. A first light source is emitted towards a solid sample, so that the first light source reflects a first light source signal at a preset focus of an interface formed between the solid sample and a preset lubricating film, the first light source signal is collected through a signal detection assembly, and interface molecule and bulk phase molecule information of the preset lubricating film is detected; and molecular characteristics at different positions in the preset lubricating film are obtained, so that a micro-level lubricating intrinsic mechanism is disclosed.

Description

Technical Field

[0001] The present application relates to the field of optical detection technology, and in particular to a device for detecting molecular behavior within a lubricating film. Background Art

[0002] Friction is ubiquitous in human production and daily life. According to statistics, friction consumes one-third of the world's disposable energy. Therefore, reducing friction and wear has been a long-cherished goal for people. It is of great significance to reduce energy consumption, achieve low-carbon environmental protection, ensure stable operation of machinery, increase service life and improve economic benefits. Mastering the essential laws of friction and lubrication, the microscopic nature and molecular-level behavior of mechanical surface lubrication, and developing advanced interface lubrication technology are the fundamental ways to solve the above problems, thereby effectively achieving energy conservation and consumption reduction, and improving the service performance of key core components of machinery. However, the existing technology is unable to detect the molecular behavior characteristics at different positions in the lubricating film, and thus cannot reveal the intrinsic lubrication mechanism at the microscopic level, which affects the in-depth exploration of reducing friction losses. Summary of the Invention

[0003] Based on this, it is necessary to provide a device for detecting molecular behavior in a lubricating film to address the problem that the existing technology cannot detect the molecular behavior characteristics at different positions in the lubricating film, which affects the in-depth exploration of reducing friction losses.

[0004] A device for detecting molecular behavior in a lubricating film, comprising:

[0005] A support platform, the support platform is used to support the solid sample;

[0006] a light-emitting component disposed on one side of the support platform, the light-emitting component being configured to emit a first light source toward the solid sample, wherein the first light source reflects a first light source signal at a preset focus of an interface formed between the solid sample and a preset lubricating film; and

[0007] A signal detection component is arranged on one side of the support platform, and the signal detection component is located on the transmission path of the first light source signal. The signal detection component is used to receive the first light source signal and determine the molecular characteristics at different positions in the preset lubricating film based on the first light source signal.

[0008] In one embodiment, the light-emitting component includes a first semi-transparent mirror, which is located on the supporting side of the supporting platform, and the supporting side is used to support the solid sample. The first semi-transparent mirror is used to transmit the first light source so that the first light source is perpendicular to the interface and reflects the first light source signal to the signal detection component in a direction perpendicular to the interface.

[0009] In one of the embodiments, the light emitting assembly is further configured to emit visible light and infrared light with the same optical path as the visible light towards the solid sample, the visible light and the infrared light reflect a sum frequency light with a frequency being a sum of frequencies of the visible light and the infrared light at the preset focal point, and the signal detecting assembly is configured to receive the sum frequency light and determine the molecular behavior and structure of the interface according to the sum frequency light signal.

[0010] In one of the embodiments, the first light source is a terahertz light source or a Raman light source.

[0011] In one of the embodiments, the molecular behavior detecting device in the lubricating film further comprises a matching piece and an optical image acquisition assembly, the matching piece is configured to abut the region corresponding to the preset focal point of the preset lubricating film to form a friction interface, and the optical image acquisition assembly is configured to acquire image information of the friction interface to confirm the thickness of the preset lubricating film.

[0012] In one of the embodiments, the support table is provided with an opening, the matching piece is arranged on the side of the support table away from the solid sample, and the matching piece abuts the preset lubricating film through the opening.

[0013] In one of the embodiments, the molecular behavior detecting device in the lubricating film further comprises a light-transmitting carrier, the light-transmitting carrier is placed on the support table, and the side of the light-transmitting carrier facing the support table is configured to deposit the solid sample film.

[0014] In one of the embodiments, the matching piece is a friction ball, and the molecular behavior detecting device in the lubricating film further comprises a driving piece, the driving piece is connected with the friction ball, and the driving piece is configured to drive the friction ball to rotate relative to the preset lubricating film.

[0015] In one of the embodiments, the molecular behavior detecting device in the lubricating film further comprises a lifting piece, the lifting piece is connected with the matching piece, and the lifting piece is configured to drive the matching piece to move close to or away from the preset lubricating film.

[0016] In one of the embodiments, the molecular behavior detecting device in the lubricating film further comprises a light supplement assembly, the light supplement assembly is arranged on one side of the support table, the light supplement assembly comprises a light supplement lamp, the light supplement lamp is configured to emit a second light source towards the solid sample, the second light source reflects a second light source signal at the preset focal point, and the optical image acquisition assembly is located on a transmission path of the second light source signal.

[0017] The optical image acquisition assembly is configured to acquire the second light source signal and confirm the image information of the preset focal point according to the second light source signal.

[0018] In one embodiment, the light supplement assembly further comprises a second half-transmission mirror, the second half-transmission mirror is located on the side of the support table facing the solid sample, and the second half-transmission mirror is used to transmit the second light source so that the second light source is vertically incident on the interface, and the second light source signal is reflected to the optical image acquisition assembly in a direction perpendicular to the interface.

[0019] Advantages:

[0020] The lubricating film molecular behavior detection device provided by the embodiment of the application comprises a support table, a light emitting assembly, and a signal detection assembly. The support table is used to support a solid sample. The light emitting assembly is arranged on one side of the support table. The light emitting assembly is used to emit a first light source towards the solid sample. The first light source signal is reflected at a preset focal point of an interface formed between the solid sample and a preset lubricating film. The signal detection assembly is arranged on one side of the support table and located on a transmission path of the first light source signal. The signal detection assembly is used to receive the first light source signal and confirm the molecular characteristics at different positions in the preset lubricating film according to the first light source signal. In the application, the first light source is emitted towards the solid sample, so that the first light source signal is reflected at the preset focal point of the interface formed between the solid sample and the preset lubricating film. The first light source signal is collected by the signal detection assembly. The interface molecular and bulk molecular information of the preset lubricating film is detected to obtain the molecular characteristics at different positions in the preset lubricating film, so that the intrinsic mechanism of lubrication at the microscopic level is revealed. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a schematic diagram of a lubricating film molecular behavior detection device according to an embodiment of the application.

[0022] Figure 2 FIG. 2 is a schematic diagram of a lubricating film molecular behavior detection device according to another embodiment of the application.

[0023] Figure 3 FIG. 3 is a schematic diagram of a solid sample cooperating with a preset lubricating film and a cooperating piece in a lubricating film molecular behavior detection device according to an embodiment of the application.

[0024] Figure 4 FIG. 4 is a schematic diagram of a solid sample cooperating with a preset lubricating film in a lubricating film molecular behavior detection device according to another embodiment of the application.

[0025] REFERENCE NUMERALS:

[0026] 100 - support table; 110 - opening; 200 - light emitting assembly; 210 - laser; 220 - second mirror; 230 - first half mirror; 300 - signal detecting assembly; 310 - spectrometer; 320 - first mirror; 400 - optical image collecting assembly; 410 - microscope; 420 - third mirror; 430 - third half mirror; 440 - magnifying lens; 500 - light supplement assembly; 510 - light supplement lamp; 520 - second half mirror; 610 - friction ball; 620 - driving member; 630 - lifting member; 640 - solid sample; 650 - preset lubricating film; 660 - light transmission carrier; 710 - first light source; 720 - first light source signal; 730 - visible light; 740 - infrared light; 750 - sum frequency light; 760 - second light source; 770 - second light source signal. DETAILED DESCRIPTION

[0027] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the spirit of the present application, and that the present application is not limited to the specific embodiments disclosed below.

[0028] In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] In addition, if the terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0030] In the present application, unless specifically defined otherwise, the terms "mounting", "connected", "connecting", "fixed", and the like, should be understood broadly. For example, it can be fixedly connected, or detachably connected, or integrated; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements, or the interaction relationship between two elements, unless otherwise explicitly defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In the present application, unless specifically defined otherwise, if there is a description of the first feature "on" or "under" the second feature, etc., it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "on", "above" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0032] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in the present application are for illustrative purposes only and do not represent the only implementation.

[0033] Referring to Figure 1 and Figure 2 , Figure 1 A schematic diagram of a device for detecting the behavior of molecules in a lubricating film according to an embodiment of the present application. Figure 2The schematic diagram of the molecular behavior detection device in the lubricating film is provided for another embodiment of the application. The molecular behavior detection device in the lubricating film provided by an embodiment of the application comprises a support table 100, a light-emitting assembly 200 and a signal detection assembly 300; the support table 100 is used for supporting a solid sample 640; the light-emitting assembly 200 is arranged on one side of the support table 100, and the light-emitting assembly 200 is used for emitting a first light source 710 towards the solid sample 640; the first light source 710 reflects a first light source signal 720 at a preset focal point of an interface formed between the solid sample 640 and a preset lubricating film 650; the signal detection assembly 300 is arranged on one side of the support table 100, and the signal detection assembly 300 is located on a transmission path of the first light source signal 720; the signal detection assembly 300 is used for receiving the first light source signal 720, and confirming the molecular characteristics at different positions in the preset lubricating film 650 according to the first light source signal 720.

[0034] Specifically, in the application, the first light source 710 is emitted towards the solid sample 640, so that the first light source 710 reflects a first light source signal 720 at a preset focal point of an interface formed between the solid sample 640 and a preset lubricating film 650; and the first light source signal 720 is collected by the signal detection assembly 300, the interface molecular and bulk molecular information of the preset lubricating film 650 is detected, the molecular characteristics at different positions in the preset lubricating film 650 is obtained, and the microscopic level lubrication intrinsic mechanism is revealed.

[0035] Referring to Figure 1 and Figure 2 In one of the embodiments, the first light source 710 is a terahertz light source or a Raman light source. When the first light source 710 is a terahertz light source, the terahertz light source reflects a terahertz light source signal at the preset focal point, so that the signal detection assembly 300 receives the terahertz light source signal, and detects the molecular signal in a spatial range of tens of microns in the lubricating film according to the terahertz light source signal, wherein the signal information includes interface molecular and part of bulk molecular information, so that the phase state of the lubricant, the spatial dynamic structure of the hydrogen bond network, the uniformity of the film thickness and the interface adhesion state can be distinguished.

[0036] When the first light source 710 is a Raman light source, the Raman light source reflects a Raman light source signal at the preset focal point, so that the signal detection assembly 300 receives the Raman light source signal, and detects the micrometer-level molecular signal in the lubricating film according to the Raman light source signal, wherein the signal information includes interface molecular and bulk molecular information.

[0037] Referring to Figure 1 and Figure 2 In one of the embodiments, the light-emitting assembly 200 comprises a laser 210, the laser 210 emits a femtosecond laser, and the femtosecond laser is rectified by an optical crystal to form a terahertz light source or is subjected to coherent anti-Stokes Raman scattering to form a Raman light source.

[0038] It should be noted that the light source emitted by the laser 210 in the present application can be processed to obtain a terahertz light source or a Raman light source, wherein the light emitting assembly 200 can emit the terahertz light source or the Raman light source towards the solid sample 640 respectively to obtain the molecular characteristics at different positions in the preset lubricating film 650, or can emit the terahertz light source and the Raman light source towards the solid sample 640 at different angles at the same time to obtain the terahertz light source signal and the Raman light source signal, so as to realize multi-scale detection of the molecular behavior in the micron to tens of microns, thereby improving the detection efficiency. That is, the present application can realize coupling of the terahertz and Raman two light paths on one detection device, thereby improving the adaptability of the molecular behavior detection device in the lubricating film.

[0039] Further, the signal detection assembly 300 comprises a spectrometer 310, which is used to receive the terahertz light source signal and the Raman light source signal to detect the molecular characteristics at different positions in the preset lubricating film 650.

[0040] Referring to Figure 1 and Figure 2 In one of the embodiments, the light emitting assembly 200 comprises a first semi-transmissive mirror 230, which is located on the support side of the support table 100, and the support side is used to support the solid sample 640. The first semi-transmissive mirror 230 is used to transmit the first light source 710 so that the first light source 710 is vertically incident on the interface, and reflect the first light source signal 720 to the signal detection assembly 300 along the direction perpendicular to the interface.

[0041] Specifically, when the first light source 710 is vertically incident on the interface, the first light source signal 720 is reflected vertically relative to the interface. Through the arrangement of the first semi-transmissive mirror 230, the first light source 710 can be transmitted and reflected, so that the first light source 710 vertically incident on the interface can be emitted along the direction perpendicular to the interface, and the interference between the light emitting assembly 200 and the signal detection assembly 300 can be avoided. The arrangement of the first light source 710 vertically incident on the interface makes the symmetry of the collection light path best, and the quality of the collected light signal is high and optical aberration is not easy to occur.

[0042] Exemplarily, the first light source 710 is configured to be reflected by the first semi-transmissive mirror 230 to be vertically incident on the interface, and the first light source signal 720 reflected by the preset focal point is transmitted through the first semi-transmissive mirror 230 and projected on the optical image acquisition assembly 400; or, the first light source 710 is configured to be arranged through the first semi-transmissive mirror 230 and to be vertically incident on the interface, and the first light source signal 720 reflected by the preset focal point is reflected by the first semi-transmissive mirror 230 to the signal detection assembly 300.

[0043] It should be noted that the first light source signal 720 is vertically arranged at the interface and returns through the interface, and the optical path is coincident. In order to facilitate observation of the optical path, the part of the optical path coincident with the first light source 710 in Figure 1 and Figure 2 is separated.

[0044] Further, the signal detection assembly 300 further comprises a first reflector 320 arranged on the side of the first half mirror 230 away from the support platform 100. The first light source signal 720 reflected through the interface passes through the first half mirror 230 and is incident on the first reflector 320, and then is reflected to the spectrometer 310. Through the arrangement of the first reflector 320, the optical path can be adjusted to reasonably arrange the position of the spectrometer 310, so that the installation position of the spectrometer 310 is not limited. Preferably, the spectrometer 310 is installed on the support platform.

[0045] Further, the light emitting assembly 200 further comprises a second reflector 220 arranged on the side of the support platform 100 facing the solid sample 640. The first light source 710 emitted by the laser 210 is incident on the second reflector 220, and then is reflected by the second reflector 220 and projected on the first half mirror 230, and is reflected by the first half mirror 230 to the interface. Through the arrangement of the second reflector 220, the optical path can be adjusted to reasonably arrange the position of the laser 210, so that the installation position of the laser 210 is not limited. Preferably, the laser 210 is installed on the support platform.

[0046] Referring to Figure 1 and Figure 2 In one embodiment, the light emitting assembly 200 is further configured to emit visible light 730 and infrared light 740 with the same optical path towards the solid sample 640. The visible light 730 and the infrared light 740 are reflected at a preset focal point to generate sum frequency light 750 with a frequency being the sum of the frequencies of the visible light 730 and the infrared light 740. The signal detection assembly 300 is configured to receive the sum frequency light 750 and confirm the molecular behavior and structure of the interface according to the sum frequency light 750 signal.

[0047] Specifically, when the light emitting assembly 200 emits the visible light 730 and the infrared light 740 with the same optical path towards the solid sample 640, a sum frequency light 750 with a frequency being the sum of the frequencies of the visible light 730 and the infrared light 740 is reflected at a preset focal point of the interface. Thus, the sum frequency light 750 signal is received by the signal detection assembly, and the molecular structure, orientation and hydrogen bond network of the interface can be tested according to the sum frequency light 750 signal. It should be noted that the sum frequency light 750 has spectral characteristics only for 1-3 layers of molecules on the interface, and has no signal for bulk molecules, so that only the information of the nanoscale interface molecules in the lubricating film can be detected.

[0048] It should be noted that although the interface molecules and bulk molecules information can be obtained by the obtained terahertz spectrum and Raman spectrum, the information contained in the interface molecule signal obtained by the sum frequency light 750 spectrum is different, the role is different, and the molecular characteristics at different positions in the lubricating film can be more comprehensively explored.

[0049] Referring to Figure 1 and Figure 2 In one embodiment, the molecular behavior detection device in the lubricating film further comprises a matching piece and an optical image acquisition assembly 400, the matching piece abuts the area corresponding to the preset focal point of the preset lubricating film 650 to form a friction interface, and the optical image acquisition assembly 400 is used to obtain image information of the friction interface to confirm the thickness of the preset lubricating film 650.

[0050] Specifically, the matching piece abuts the area corresponding to the preset focal point of the preset lubricating film 650, so as to form a friction interface, and the image information of the friction interface is obtained by the optical image acquisition assembly 400 to obtain the optical picture of the friction contact area between the matching piece and the solid sample 640. The interference fringes can be displayed in the optical picture, so that the thickness of the preset lubricating film 650 can be calculated by the relative light intensity method, and the molecular level micro-mechanism of reducing friction under different lubricating states can be effectively analyzed.

[0051] The optical image acquisition assembly 400 can also be used to observe the surface morphology and state of the sample, select the surface with good surface state for testing, and distinguish the material performance of different positions on the surface. For example, the two-dimensional material is distributed in block shape on the surface of the sample, the position of the two-dimensional material can be detected by adjusting the position of the sample or other components by the optical image. In addition, the optical image acquisition assembly 400 can also be used to observe the coincidence of the visible light 730 and the infrared light 740. The two beams of light need to be completely overlapped in time and space to produce the sum frequency light 750 signal. The installation of the optical image acquisition assembly 400 greatly reduces the difficulty of detecting the sum frequency light 750 signal of the solid sample 640.

[0052] Referring to Figure 1 In one embodiment, the support table 100 is provided with an opening 110, the matching piece is arranged on the side of the support table 100 away from the solid sample 640, and the matching piece abuts the preset lubricating film 650 through the opening 110.

[0053] Specifically, the mating component is disposed below the support platform 100 and abuts against the solid sample 640 via a pre-set lubricating film 650. By placing the mating component below the support platform 100, interference with light and other components can be reduced, and the material of the mating component is not restricted, and can be opaque. In other embodiments, when the mating component is made of a translucent material, the mating component can be disposed above the support platform 100.

[0054] See Figure 1 and Figure 3 , Figure 3 A schematic diagram illustrating the interaction of a solid sample with a pre-set lubricating film and a mating component in a device for detecting molecular behavior within a lubricating film, according to one embodiment of the present application. In one embodiment, the device further includes a light-transmitting carrier 660, which is positioned on a support 100. The side of the light-transmitting carrier 660 facing the support 100 is used to deposit a thin film of solid sample 640.

[0055] If the solid sample 640 is made of a translucent material, the first light source 710, the visible light 730 and the infrared light 740 can be reflected on the interface of the solid sample 640. If the solid sample 640 is made of a non-translucent material, in order to ensure that the first light source 710, the visible light 730 and the infrared light 740 are reflected on the solid-liquid interface of the solid sample 640, the thickness of the solid sample 640 needs to be limited, that is, the thickness of the solid sample 640 is 20-100 nanometers, so as to ensure that the first light source 710, the visible light 730 and the infrared light 740 are reflected on the interface of the solid sample 640. However, the thickness of the solid sample 640 is too thin, the stability is poor and the processing and molding are difficult. By depositing a thin film of the solid sample 640 on the side of the translucent carrier 660 facing the support platform 100, the stability of the solid sample 640 can be improved. Exemplarily, the translucent carrier 660 can be silicon dioxide, calcium fluoride, sapphire, etc.

[0056] It should be noted that, regardless of whether the solid sample 640 is light-transmissive or not, a thin film can be deposited on the side of the light-transmissive carrier 660 facing the support platform 100 .

[0057] It should also be noted that, see Figure 2 and Figure 4 , Figure 4 A schematic diagram illustrating the cooperation between a solid sample and a preset lubricating film in a device for detecting molecular behavior within a lubricating film, according to another embodiment of the present application. If the solid sample 640 is opaque and a thin film cannot be deposited on the light-transmitting carrier 660, a preset lubricating film 650 can only be provided on the side of the solid sample 640 facing away from the support 100 to form an interface. This ensures that the first light source 710, visible light 730, and infrared light 740 are reflected at the interface of the solid sample 640.

[0058] It should be noted that the application can adapt to various test conditions such as the material of the solid sample 640, so as to realize the regulation of the interface performance, thereby realizing the regulation of the molecular microcosmic behavior of the interface, and revealing the mechanism of the change of the molecular structure with the experimental conditions.

[0059] Referring to Figure 1 and Figure 3 In one embodiment, the fitting member is a friction ball 610, and the molecular behavior detection device of the lubricating film further comprises the friction ball 610 and a driving member 620 connected with the friction ball 610, and the driving member 620 is used to drive the friction ball 610 to rotate relative to the preset lubricating film 650.

[0060] Specifically, the friction ball 610 is driven to rotate by the driving member 620, so as to simulate the interface shear condition in the friction working condition, that is, the film thickness is calculated by the optical interference fringes in the application, and the dynamic regulation in the friction working condition can effectively analyze the molecular microcosmic mechanism of reducing friction under different lubricating states. Preferably, the driving member 620 is a motor.

[0061] Further, the speed of the driving member 620 driving the friction ball 610 to rotate relative to the preset lubricating film 650 is adjustable, so as to simulate the interface shear condition under different friction working conditions.

[0062] Referring to Figure 1 and Figure 3 In one embodiment, the molecular behavior detection device of the lubricating film further comprises a lifting member 630 connected with the fitting member, and the lifting member 630 is used to drive the fitting member to approach or move away from the preset lubricating film 650, so as to adjust the load of the friction ball 610, and further simulate the interface shear condition under different friction working conditions. That is, the application can simulate different lubricating states by adjusting the speed and load of the friction pair.

[0063] In summary, in the application, the information such as the experimental working condition, the friction coefficient and the thickness of the lubricating film is known, and the molecular behavior characteristics of the nanoscale, microscale and tens of microns in different positions in the preset lubricating film 650 are analyzed according to the sum frequency vibration spectrum, the Raman spectrum and the terahertz spectrum signal, so as to effectively analyze the molecular microcosmic mechanism of reducing friction under different lubricating states. The material of the solid sample 640 and the material of the preset lubricating film 650 can be selected according to actual needs.

[0064] Referring to Figure 1 and Figure 2In one of the embodiments, the molecule behavior detecting device in the lubricating film further comprises a light supplement assembly 500 arranged on one side of the support table 100. The light supplement assembly 500 comprises a light supplement lamp 510 configured to emit a second light source 760 towards the solid sample 640. The second light source 760 reflects a second light source signal 770 at a preset focal point of the interface between the solid sample 640 and the preset lubricating film 650. The optical image acquisition assembly 400 is arranged on the transmission path of the second light source signal 770 and configured to acquire the second light source signal 770 and confirm the image information of the preset focal point according to the second light source signal 770.

[0065] Specifically, the light supplement lamp 510 emits the second light source 760 towards the solid sample 640 to supplement the preset focal point of the solid sample 640, so that the second light source signal 770 reflected via the preset focal point can be acquired by the optical image acquisition assembly 400, thereby accurately obtaining the image information of the preset focal point to accurately detect the thickness of the preset lubricating film 650. Preferably, the second light source 760 is white light.

[0066] Referring to Figure 1 and Figure 2 In one of the embodiments, the light supplement assembly 500 further comprises a second half mirror 520 arranged on the side of the support table 100 facing the solid sample 640. The second half mirror 520 is configured to transmit the second light source 760 so that the second light source 760 is perpendicularly incident on the interface and reflects the second light source 760 to the optical image acquisition assembly 400 along a direction perpendicular to the interface.

[0067] Specifically, the second half mirror 520 is arranged to transmit and reflect the second light source 760, so that the second light source 760 perpendicularly incident on the interface can be perpendicularly emitted from the interface, and the optical image acquisition assembly 400 acquires the image perpendicularly incident on the preset focal point, thereby obtaining more accurate image and improving the reliability of the molecule behavior detecting device in the lubricating film.

[0068] For example, the second light source 760 is configured to be reflected by the second half mirror 520 to be perpendicularly incident on the interface, and the second light source signal 770 reflected via the preset focal point is projected on the optical image acquisition assembly 400 through the second half mirror 520; or, the second light source 760 is configured to be arranged through the half mirror and perpendicularly incident on the interface, and the second light source signal 770 reflected via the preset focal point is reflected to the optical image acquisition assembly 400 via the half mirror.

[0069] Referring to Figure 1 and Figure 3In one of the embodiments, the light supplement assembly 500 further comprises a third partial reflector 430, which is arranged on the side of the first partial reflector 230 facing the support table 100, and is used for reflecting the second light source 760 and allowing the first light source 710 to pass through, so that the device of the present application can simultaneously measure the first light source 710 and the second light source 760, i.e. coupling the first light source 710 and the second light source 760 to one detection device, thereby improving the adaptability of the molecular behavior detection device in the lubricating film.

[0070] Since the molecular behavior detection device in the lubricating film of the present application can realize coupling of the terahertz and Raman light paths on one detection device, thereby realizing multi-spectral coupling detection, i.e. integrating sum frequency vibration spectrum, Raman spectrum, terahertz spectrum and optical interference imaging, realizing multi-scale molecular behavior detection from nanoscale, micrometer scale to tens of micrometers.

[0071] Referring to Figure 1 and Figure 3 In one of the embodiments, the optical image acquisition assembly 400 comprises a microscope 410 and a magnifying glass 440, which is arranged on the side of the solid sample 640 away from the support table 100, and is used for magnifying the first light source signal 720, so that the first light source signal 720 after passing through the magnifying glass 440 is projected on the microscope 410, to obtain a more accurate optical image.

[0072] Referring to Figure 1 and Figure 3 In one of the embodiments, the optical image acquisition assembly 400 further comprises a third reflector 420, which is arranged between the microscope 410 and the second partial reflector 520, and is used for reflecting the second light source signal 770 after passing through the second partial reflector 520 to the microscope 410. Through the arrangement of the third reflector 420, the optical path can be adjusted to reasonably layout the position of the microscope 410, so that the installation position of the microscope 410 is not limited.

[0073] The technical features of the above-mentioned embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0074] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A device for detecting molecular behavior in a lubricating film, characterized in that: The device for detecting molecular behavior in the lubricating film comprises: A support platform, the support platform is used to support the solid sample; a light-emitting component disposed on one side of the support platform, the light-emitting component being configured to emit a first light source toward the solid sample, wherein the first light source reflects a first light source signal at a preset focus of an interface formed between the solid sample and a preset lubricating film; and A signal detection component is arranged on one side of the support platform, and the signal detection component is located on the transmission path of the first light source signal. The signal detection component is used to receive the first light source signal and determine the molecular characteristics at different positions in the preset lubricating film based on the first light source signal.

2. The device for detecting molecular behavior in a lubricating film according to claim 1, characterized in that: The light-emitting component includes a first semi-transparent mirror, which is located on the supporting side of the supporting platform, and the supporting side is used to support the solid sample. The first semi-transparent mirror is used to transmit the first light source so that the first light source is perpendicular to the interface and reflects the first light source signal to the signal detection component in a direction perpendicular to the interface.

3. The device for detecting molecular behavior in a lubricating film according to claim 1, characterized in that: The light-emitting component is also used to emit visible light and infrared light with the same optical path as the visible light toward the solid sample. The visible light and the infrared light reflect a beam of sum-frequency light with a frequency that is the sum of the frequencies of the visible light and the infrared light at the preset focus. The signal detection component is used to receive the sum-frequency light and determine the molecular behavior and structure of the interface based on the sum-frequency light signal.

4. The device for detecting molecular behavior in a lubricating film according to claim 1, characterized in that: The first light source is a terahertz light source or a Raman light source.

5. The device for detecting molecular behavior in a lubricating film according to any one of claims 1 to 4, characterized in that: The device for detecting molecular behavior in the lubricating film also includes a mating part and an optical image acquisition component. The mating part is used to abut against the area of ​​the preset lubricating film corresponding to the preset focus to form a friction interface. The optical image acquisition component is used to obtain image information of the friction interface to confirm the thickness of the preset lubricating film.

6. The device for detecting molecular behavior in a lubricating film according to claim 5, characterized in that: The supporting platform is provided with an opening, the matching piece is arranged on a side of the supporting platform away from the solid sample, and the matching piece abuts against the preset lubricating film through the opening.

7. The device for detecting molecular behavior in a lubricating film according to claim 6, characterized in that: The device for detecting molecular behavior in a lubricating film further comprises a light-transmitting carrier, which is placed on the support table. The side of the light-transmitting carrier facing the support table is used for depositing the solid sample film.

8. The device for detecting molecular behavior in a lubricating film according to claim 5, characterized in that: The matching part is a friction ball, and the device for detecting molecular behavior in the lubricating film further includes a driving part, which is connected to the friction ball and is used to drive the friction ball to rotate relative to the preset lubricating film.

9. The device for detecting molecular behavior in a lubricating film according to claim 5, characterized in that: The device for detecting molecular behavior in the lubricating film further includes a lifting member connected to the matching member, and the lifting member is used to drive the matching member to move closer to or away from the preset lubricating film.

10. The device for detecting molecular behavior in a lubricating film according to claim 5, characterized in that: The device for detecting molecular behavior in the lubricating film further includes a fill light component, which is disposed on one side of the support platform. The fill light component includes a fill light lamp, which is used to emit a second light source toward the solid sample. The second light source reflects a second light source signal at the preset focus. The optical image acquisition component is located on the transmission path of the second light source signal. The optical image acquisition component is used to acquire the second light source signal and confirm the image information of the preset focus according to the second light source signal.

11. The device for detecting molecular behavior in a lubricating film according to claim 10, characterized in that: The fill light component also includes a second semi-transparent mirror, which is located on the side of the support platform facing the solid sample. The second semi-transparent mirror is used to transmit the second light source so that the second light source is perpendicular to the interface and reflects the second light source signal to the optical image acquisition component in a direction perpendicular to the interface.

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