Continuous measurement device for spatial distribution characteristics of phosphorescent signals

Abstract

The invention discloses a continuous measurement device for spatial distribution characteristics of phosphorescence signals, and relates to the field of phosphorescence temperature measurement calculation, and the device comprises a light source module, a detector module, a rotary support module and a vertical angle detection light path module. The vertical angle detection light path module comprises a dichroscope; the dichroscope is used for reflecting incident light to the phosphorescence coating when the incident light emitted by the light source module is incident within a preset angle range and transmitting a phosphorescence signal emitted by the phosphorescence coating. According to the application, the dichroscope is utilized to emit light emitted by the excitation light source to the phosphorescent coating, and phosphorescent signals generated after phosphorescent elements are excited can penetrate through the dichroscope, are not reflected and are collected by the detector module located right above. According to the invention, the distribution characteristics of phosphorescence signals in the whole hemispherical space can be measured.

Description

Technical Field

[0001] The present application relates to the technical field of phosphorescence temperature measurement, and in particular to a continuous measurement device for the spatial distribution characteristics of phosphorescence signals. Background Art

[0002] Phosphorescence temperature measurement technology is a non-contact temperature measurement technology that has emerged in recent years. It has a series of advantages such as non-contact, field testing, fast response, high upper limit of temperature measurement, little interference from environmental factors, and high temperature measurement accuracy. Compared with traditional radiation test technologies such as infrared temperature measurement, phosphorescence temperature measurement technology also has the unique advantages of not being affected by changes in surface emissivity, being less affected by complex gas components and background radiation of aircraft engines, and being able to measure the internal temperature field of solid media with translucent optical properties such as thermal barrier coatings. It has a very broad development and application prospect in the field of aircraft engine temperature testing. From the current research status at home and abroad, this technology has completed the experimental verification of surface temperature field measurement of hot end components such as turbine blades, combustion chambers, and nozzles, but it still has great limitations in practical application. One of the main limiting factors is that when the temperature to be measured exceeds 1000℃, the thermal quenching effect causes the phosphorescence signal to weaken rapidly, resulting in a weak signal-to-noise ratio of the measured temperature and a decrease in temperature measurement accuracy. To solve this problem and improve the signal-to-noise ratio of the collected phosphorescence signal, it is necessary to accurately adjust the collection angle of the detection optical fiber so that it can collect the highest signal intensity in the hemispherical space as much as possible. Therefore, it is crucial to master the spatial distribution characteristics of the phosphorescence signal.

[0003] At present, the bidirectional reflectance distribution function used to measure the spatial distribution of the reflectivity of solid surfaces uses a multi-angle control device to control the zenith angle and azimuth angle of the incident light, the zenith angle and azimuth angle of the light to be measured, a total of four angles. However, in the existing test device, at the same incident and reflection angles, the incident light path (light source) and the reflected light path (detector) are mutually blocked, resulting in discontinuous test data. Especially when the incident light is incident vertically (θ i =0), its reflection characteristics cannot be measured. Summary of the invention

[0004] The purpose of the present application is to provide a continuous measurement device for the spatial distribution characteristics of phosphorescence signals, which can measure its reflection characteristics at a vertical angle and near a vertical angle.

[0005] To achieve the above objectives, this application provides the following solutions:

[0006] In a first aspect, the present application provides a continuous measurement device for the spatial distribution characteristics of phosphorescence signals, the continuous measurement device for the spatial distribution characteristics of phosphorescence signals comprising: a light source module, a detector module, a rotating bracket module and a vertical angle detection optical path module;

[0007] The rotating bracket module is used to rotate the light source module and the detector module;

[0008] The vertical angle detection optical path module includes a dichroic mirror;

[0009] The dichroic mirror is used to reflect the incident light onto the phosphorescent coating when the incident light emitted by the light source module is incident within a preset angle range, and transmit the phosphorescent signal emitted by the phosphorescent coating;

[0010] The detector module is used to obtain the phosphorescence signal emitted by the phosphorescent coating to complete continuous measurement.

[0011] Optionally, the preset angle range is -5° to 5°.

[0012] Optionally, the dichroic mirror is a 355nm dichroic mirror; the 355nm dichroic mirror is arranged directly below the detector module and forms an angle of 45° with the detector module;

[0013] Optionally, the continuous measurement device for the spatial distribution characteristics of phosphorescence signals further comprises: an optical platform;

[0014] The rotating bracket module includes a sample rotating stage, a sample vertical displacement stage, a light source vertical adjustment bracket, a detector rotating motor and a detector adjustment bracket;

[0015] The sample rotating stage is fixed on the optical platform, and the sample rotating stage is sequentially connected to a detector rotating motor and a detector adjusting bracket; the sample rotating stage and the sample vertical displacement stage are coaxially fixed on the detector adjusting bracket.

[0016] Optionally, the light source module includes a laser light source, a light source optical fiber and a collimating lens;

[0017] One side of the collimating lens is fixed on the light source vertical adjustment bracket, and the other side of the collimating lens is connected to the light source optical fiber;

[0018] The laser light source is connected to the light source optical fiber via an optical path.

[0019] Optionally, the vertical angle detection optical path module further includes a 355nm high-pass filter;

[0020] The 355nm high-pass filter is connected to the port of the collimating lens through a clamp.

[0021] Optionally, the detector module includes a fiber optic spectrometer, a detection optical fiber, a light-collecting lens and a filter;

[0022] The filter is fixed to the port of the light-collecting lens by a clamp;

[0023] One side of the light-collecting lens is fixed on the detector adjustment bracket, and the other side of the light-collecting lens is connected to the detection optical fiber.

[0024] Optionally, the 355 nm dichroic mirror is disposed above the detection optical fiber.

[0025] Optionally, the 355nm dichroic mirror is fixed to the detector adjustment bracket by a clamp.

[0026] Optionally, the light source vertical adjustment bracket has a vertical lifting stroke of 300 mm and a zenith angle rotation control range of 0-180°;

[0027] The detector adjustment bracket has a vertical lifting stroke of 600mm, a zenith angle rotation control range of 0-180°, and an azimuth angle rotation control range of 0-360°;

[0028] The sample rotating platform has a vertical lifting stroke of 600 mm and an azimuth rotation control range of 0-360°.

[0029] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0030] The present application provides a continuous measurement device for the spatial distribution characteristics of phosphorescence signals, including: a light source module, a detector module, a rotating bracket module and a vertical angle detection optical path module; wherein the rotating bracket module is used to rotate the light source module and the detector module; the vertical angle detection optical path module includes a dichroic mirror; the dichroic mirror is used to reflect the incident light to the phosphorescent coating when the incident light emitted by the light source module is incident within a preset angle range, and transmit the phosphorescent signal emitted by the phosphorescent coating. In the prior art, due to the mutual shielding effect between the detector and the light source, it is impossible to measure its reflection characteristics near the vertical angle. In the present application, a 355nm dichroic mirror is used to transmit the light emitted by the excitation light source to the phosphorescent coating, and then the phosphorescent elements in the phosphorescent coating are excited to generate phosphorescent signals. The phosphorescent signal can pass through the 355nm dichroic mirror, so it will not be reflected, but will be collected by the detector module located directly above. The present application solves the problem in the prior art that the reflection characteristics near the vertical angle cannot be measured due to the mutual obstruction between the detector and the light source (the obstruction in the prior art is because the light source module and the detector module are parallel, and the detector module can only receive and utilize reflected light. If diffusely reflected light is used, the measurement accuracy cannot be guaranteed, thus causing the obstruction problem). The present application solves the problem in the prior art that the reflection characteristics near the vertical angle cannot be measured. The reflection characteristics at the vertical angle and near the vertical angle can be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of a typical spatial rotational freedom control device provided in an embodiment of the present application;

[0033] Figure 2 Schematic diagrams of various angles of a typical spatial rotational freedom control device provided in an embodiment of the present application;

[0034] Figure 3 A schematic diagram of the spatial distribution of phosphorescence signals provided in an embodiment of the present application;

[0035] Figure 4 A schematic diagram of the structure of a continuous measurement device for the spatial distribution characteristics of phosphorescence signals provided in one embodiment of the present application;

[0036] Figure 5 A schematic diagram of the principle of a continuous measurement device for the spatial distribution characteristics of phosphorescence signals provided in one embodiment of the present application;

[0037] Figure 6 A schematic diagram of the rotation and lifting stroke of the rotary adjustment bracket provided in an embodiment of the present application;

[0038] Figure 7 A schematic diagram of the rotational control freedom provided by an embodiment of the present application;

[0039] Figure 8 A schematic diagram of a vertical angle detection optical path module provided in an embodiment of the present application;

[0040] Fig. 9 A schematic diagram of a phosphorescence temperature measurement system provided in one embodiment of the present application;

[0041] FIG. 10 is a schematic diagram of the spatial distribution of phosphorescence signals provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] At present, the research on optical modeling and simulation of phosphorescence signals is usually based on the Kubelka-Munk (KM) theory, which assumes that the transmission process of incident light and reflected light inside the coating is a one-dimensional process, that is, the scattering inside the coating only includes two directions: forward scattering and backward scattering, resulting in that its calculation results completely ignore the directionality of the emitted phosphorescence. In the test system, the phosphorescence signal enters the detector through light-receiving elements such as probes or lenses. The acquisition method limits the detector to only receive phosphorescence signals within a certain fixed solid angle. The spatial distribution characteristics of the phosphorescence on the coating surface will directly affect the phosphorescence intensity received by the detector; at the same time, the emission direction of the actual phosphorescence signal is affected by multiple factors such as coating thickness, coating scattering coefficient, and coating surface characteristics, resulting in great uncertainty in its spatial distribution. Collecting the phosphorescence spatial signal of the temperature measurement coating, analyzing its spatial distribution characteristics, and establishing a spatial distribution model are of great significance to improving the signal acquisition scheme of the phosphorescence temperature measurement system and guiding the post-processing of the phosphorescence coating surface.

[0044] According to the analysis of the spatial distribution characteristics of phosphorescence signals, the core of the measurement device is the precise control of the zenith angle and azimuth angle of the light source, the zenith angle and azimuth angle of the detector. The spatial distribution function of phosphorescence signals is mainly used to characterize the intensity distribution characteristics of phosphorescence excited by excitation light incident at different angles at any detection angle. The mathematical expression is:

[0045]

[0046] L r The coating surface dA is the The phosphorescence brightness in the direction, in W / (m2.Sr), E i yes The irradiance generated by the incident excitation light in the direction is expressed in W / (m2). The core of the measurement device is also the zenith angle and azimuth angle of the incident light. Zenith angle and azimuth angle of the light to be measured A total of four angles are accurately controlled. Therefore, the present application is a device for measuring the spatial distribution characteristics of phosphorescent coatings based on multi-angle control. The current multi-angle control device mainly uses a high-precision angle device to achieve signal measurement at any incident and detection angles through the coordinated rotation between the sample, light source and detector.

[0047] See also Figure 1 and Figure 2 At present, the bidirectional reflectance distribution function used to measure the spatial distribution of solid surface reflectivity is controlled by a multi-angle control device, and the zenith angle and azimuth angle of the incident light, the zenith angle and azimuth angle of the light to be measured are controlled by the guide rail or the bracket respectively. There are four angles in total. Its main disadvantage is that at the same incident and reflection angles, the incident light path (light source) and the reflected light path (detector) block each other, making the test data discontinuous. Especially when the incident light is vertical (θ i =0), due to the mutual shielding between the detector and the light source, it is impossible to measure the vertical angle (θ r =0) reflection characteristics.

[0048] As for the spatial distribution of phosphorescence signals, the schematic diagram is as follows: Figure 3 As shown, when the incident light is incident vertically (θ i =0) vertical angle (θ r =0) has the highest phosphorescence signal intensity, which is the key data that must be measured. The bidirectional reflectance function measurement device cannot be directly applied to this experimental object, and targeted improvements and designs must be made. In response to this problem, the present application adds a dichroic mirror structure and improves the test optical path to measure the spatial distribution characteristics of phosphorescence excited at different angles in the hemispherical space.

[0049] The present application provides a test device specifically for the spatial distribution characteristics of phosphorescence signals. The actual test system of phosphorescence temperature measurement technology relies on probes or cameras for signal acquisition, which means that the detector can only receive phosphorescence signals within a fixed solid angle. Therefore, measuring the spatial signal distribution characteristics of the phosphorescent coating is crucial for the phosphorescence temperature measurement system, and there is currently no suitable measurement device for the hemispherical spatial distribution of phosphorescence. The present application solves the test problem of the spatial distribution of phosphorescent coating signals through a spatial angle control device and an optical path design at a special angle, which can be used to analyze the optimal acquisition angle and improve the signal-to-noise ratio of the collected phosphorescence signal.

[0050] For ease of understanding, some terms used in this embodiment are explained below:

[0051] Phosphorescence: Phosphorescence is a cold luminescence form that is different from thermal luminescence and can be stimulated by methods other than heating, such as ultraviolet stimulation, electron beam bombardment, etc. The excitation light stimulates the phosphorescent material to cause the electron energy level to jump to a high energy level, which falls back to a low energy level after a certain period of time, and releases energy in the process, producing phosphorescence.

[0052] Phosphorescence temperature measurement technology: The surface temperature of the object to be measured can be inferred based on the mapping relationship between the phosphorescence spectrum characteristics and temperature, and can be used to measure the two-dimensional temperature field on the solid surface.

[0053] Phosphorescent temperature measurement coating: A phosphorescent coating for temperature measurement is prepared by doping phosphorescent materials into ceramic media and using methods such as thermal spraying.

[0054] Thermal quenching: refers to the phenomenon that the luminescence efficiency or luminescence performance of rare earth materials decreases significantly under high temperature conditions. The reason for the thermal quenching phenomenon is that the non-radiative transition between the excited state and the ground state in the rare earth materials increases under high temperature conditions, the lattice vibration of the material is enhanced, and the energy level filling effect is enhanced.

[0055] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0056] In an exemplary embodiment, Figure 4 As shown, a continuous measurement device for the spatial distribution characteristics of phosphorescence signals is provided, and the continuous measurement device for the spatial distribution characteristics of phosphorescence signals includes: a light source module, a detector module, a rotating bracket module and a vertical angle detection optical path module.

[0057] The rotating bracket module is used to rotate the light source module and the detector module.

[0058] The vertical angle detection optical path module includes a dichroic mirror.

[0059] The dichroic mirror is used for reflecting the incident light onto the phosphorescent coating when the incident light emitted by the light source module is incident within a preset angle range, and transmitting the phosphorescent signal emitted by the phosphorescent coating.

[0060] The detector module is used to obtain the phosphorescence signal emitted by the phosphorescent coating to complete continuous measurement.

[0061] Wherein, the vertical angle detection optical path module includes a 355nm dichroic mirror; the 355nm dichroic mirror is arranged directly below the detector module and forms an angle of 45° with the detector module.

[0062] The vertical angle detection optical path module is used to reflect the incident light when the incident light emitted by the light source module is incident within a preset angle range, wherein the preset angle range is -5° to 5°.

[0063] The continuous measurement device for the spatial distribution characteristics of phosphorescence signals also includes: an optical platform; the optical platform used is a damped optical vibration isolation platform.

[0064] The rotating bracket module is used to rotate the light source module and the detector module.

[0065] The rotating support module comprises a sample rotating platform, a sample vertical displacement platform, a light source vertical adjustment support, a detector rotating motor and a detector adjustment support.

[0066] The sample rotating stage is fixed on the optical platform, and the sample rotating stage is sequentially connected to a detector rotating motor and a detector adjusting bracket; the sample rotating stage and the sample vertical displacement stage are coaxially fixed on the detector adjusting bracket.

[0067] The light source vertical adjustment bracket has a vertical lifting stroke of 300mm and a zenith angle rotation control range of 0-180°;

[0068] The detector adjustment bracket has a vertical lifting stroke of 600mm, a zenith angle rotation control range of 0-180°, and an azimuth angle rotation control range of 0-360°;

[0069] The sample rotating platform has a vertical lifting stroke of 600 mm and an azimuth rotation control range of 0-360°.

[0070] The light source module includes a laser light source, a light source optical fiber and a collimating lens.

[0071] One side of the collimating lens is fixed on the light source vertical adjustment bracket, and the other side of the collimating lens is connected to the light source optical fiber.

[0072] The laser light source is connected to the light source optical fiber via an optical path.

[0073] In addition, the vertical angle detection optical path module also includes a 355nm high-pass filter; the 355nm high-pass filter is connected to the port of the collimating lens through a clamp; the 355nm dichroic mirror is arranged above the detection optical fiber; the 355nm dichroic mirror is fixed to the detector adjustment bracket through a clamp.

[0074] The detector module includes a fiber optic spectrometer, a detection optical fiber, a light-collecting lens and a filter.

[0075] The filter is fixed to the port of the light-collecting lens by a clamp.

[0076] One side of the light-collecting lens is fixed on the detector adjustment bracket, and the other side of the light-collecting lens is connected to the detection optical fiber.

[0077] Specifically, the continuous measurement device for the spatial distribution characteristics of phosphorescence signals provided in this embodiment is composed of an optical platform, a light source module, a detector module, a rotating bracket module, a control and data processing module, a vertical angle detection optical path module, etc.

[0078] The light source module includes a laser light source, a light source optical fiber, a collimating lens, etc.; the detector module includes a fiber optic spectrometer, a detection optical fiber, a light receiving lens, a filter, etc.; the rotating bracket module includes a sample rotating table, a sample vertical displacement table, a light source vertical adjustment bracket, and a detector adjustment bracket; the control and data processing module includes a five-axis motion controller, a light source and a spectrometer signal trigger, and a spectrum analysis software, etc.; the vertical angle detection optical path module includes a 355nm dichroic mirror, a 355nm high-pass filter, etc.

[0079] The position connection relationship is as follows:

[0080] The optical platform used is a damped optical vibration isolation platform, and the light source vertical adjustment bracket is fixed on the optical platform by bolts.

[0081] The motor of the sample rotating stage is fixed to the optical platform by bolts, and the detector rotating motor and the detector adjustment bracket are connected to the optical platform by bolts in sequence; the sample rotating stage and the sample vertical displacement stage are coaxially fixed on the detector adjustment bracket.

[0082] The filter is fixed to the light-collecting lens port by a clamp, one side of the light-collecting lens is fixed to the detector adjustment bracket by a thread, and the other side is connected to the detection optical fiber. The dichroic mirror is above the detection optical fiber and fixed to the detector adjustment bracket by a clamp.

[0083] The 355nm high-pass filter is connected to the collimating lens port through a clamp, one side of the collimating lens is fixed to the light source vertical adjustment bracket through a thread, and the other side is connected to the light source optical fiber.

[0084] See also Figure 5 , Figure 5 This is a schematic diagram of the principle of the measuring device. The device irradiates the phosphorescent coating with excitation light emitted by an excitation light source (usually a pulsed laser with good monochromaticity). The phosphorescent elements in the coating are excited to generate phosphorescent signals, which are then collected through detection optical fibers.

[0085] The sample rotating table uses the geometric center of the circular or square sample as the rotation center, and can realize the sample's 360° rotation at any angle in the horizontal direction, with a rotation angle control accuracy of 0.1°; the sample rotating table has a vertical lifting stroke of 600mm, which can be used to adjust the rotation center of samples of different thicknesses without changing during testing.

[0086] The light source is transmitted through the light source optical fiber, which is connected to the collimating lens through threads, and the collimating lens is fixed to the light source vertical adjustment bracket by bolts. The optical path of the light source optical fiber probe points to the rotation center, and the vertical distance adjustment bracket of the light source is used to ensure its vertical distance adjustment. The rotation of the zenith angle of the light source is controlled by the rotating console (this is not the sample rotating table mentioned above, the light source bracket has a separate rotating shaft and rotating motor). The rotation range of the zenith angle of the light source is -90° to 90°, and the vertical lifting stroke is 300mm. Figure 6 shown.

[0087] The light-collecting lens is fixed to the detector adjustment bracket through a bolt bracket. A filter is installed in front of the light-collecting lens to filter out strong excitation light. The fiber optic probe is connected to the lens through threads. The collected phosphorescence signal is transmitted through the detection optical fiber and then enters the spectrometer. After the spectrometer splits the light, the data is processed by the data processing module. The detection optical fiber controls the rotation of the zenith angle and azimuth angle of the detector through two rotation controllers. The rotation range of the detection optical fiber zenith angle is -90° to 90°, and the rotation range of the azimuth angle is: -180° to 180°. The vertical lifting stroke is 600mm. Figure 7 shown.

[0088] The vertical angle detection optical path module is used to detect the vertical angle of the incident light (θ i =0), the excitation light source is reflected to solve the problem of blocking the incident light path and the reflected light path. The dichroic mirror has a reflective effect on light of a specific wavelength (excitation light) and a projection effect on light of other wavelengths. The dichroic mirror is installed at a 45° angle just below the detection light path. The light source is rotated to adjust the bracket so that the light source is horizontally incident, and after being reflected by the dichroic mirror, it irradiates the phosphorescent coating vertically. The phosphorescent signal after excitation can be received by the detector through the dichroic mirror. The filter is used to filter the stronger excitation light signal. The schematic diagram of the vertical angle detection light path module is shown in the figure. Figure 8 The occlusion in the prior art is caused by the fact that the light source module and the detector module are parallel, and the detector module can only receive reflected light. If diffuse reflected light is used, the measurement accuracy cannot be guaranteed, thus causing the occlusion problem. Therefore, the present application sets the light source module to be perpendicular to the detector and adds a dichroic mirror, such as Figure 8 shown.

[0089] The continuous measurement device for the spatial distribution characteristics of phosphorescence signals provided in this embodiment can test the optical path through a dichroic mirror, and transmit the excitation light through the dichroic mirror when the incident angle of the light source is -5° to 5°, thereby solving the problem of light path obstruction. Its light source adjustment bracket has a 300mm vertical lifting stroke and a zenith angle rotation control range of 0-180°; the detector adjustment bracket has a 600mm vertical lifting stroke, a zenith angle rotation control range of 0-180°, and an azimuth rotation control range of 0-360°; the sample rotating table has a vertical lifting stroke of 600mm and an azimuth rotation control range of 0-360°. In addition, this embodiment transmits excitation light and phosphorescence signals through a combination of optical fibers and lenses, which is convenient for angle rotation control.

[0090] Through the above design, this embodiment realizes measurement through the dichroic mirror module when the incident angle of the light source is within the range of -5° to 5°, and adjusts through the light source rotation controller at other angles, which can effectively solve the problem of blocking the light path of the light source and the detection light path, and realize the measurement of the hemispherical spatial distribution characteristics of the phosphorescent temperature measurement coating at any angle. This embodiment designs a large range of vertical travel of the light source adjustment bracket, the detector adjustment bracket and the sample rotation stage, which can be applied to the measurement of samples of different thicknesses.

[0091] See also Fig. 9 The principle of phosphorescence temperature measurement technology is: spray a ceramic coating doped with trace rare earth ions on the surface of the component to be tested. After irradiation with excitation light, the rare earth ions will emit phosphorescence. According to the mapping relationship between the phosphorescence spectrum characteristics and temperature, the temperature field of the surface to be tested can be obtained. Phosphorescence temperature measurement technology has the advantages of non-contact, transient (frequency response can reach ms level), high precision (especially better than 1% at high temperature), large temperature measurement range (theoretical upper limit exceeds 2000℃), etc. Compared with traditional radiation test technologies such as infrared temperature measurement, phosphorescence temperature measurement technology also has the unique advantages of not being affected by changes in surface emissivity, being less affected by the complex gas components and background radiation of aircraft engines, and being able to measure the internal temperature field of solid media with translucent optical properties such as thermal barrier coatings. It has a very broad development and application prospect in the field of aircraft engine temperature testing.

[0092] The spatial distribution characteristics and laws of phosphorescence signals directly determine the signal intensity collected by the detector at a fixed test angle, and have an important impact on the temperature measurement range and test accuracy of the system. The spatial distribution characteristics and laws of the phosphorescence spectrum of the temperature measurement coating are the key issues that need to be solved in phosphorescence temperature measurement. Phosphorescence coatings have body luminescence, refraction and scattering effects, which make the phosphorescence spatial distribution characteristics of coatings with different thicknesses, surface roughness and surface curvatures have great differences when excited. Figure 10 shows several typical signal spatial distribution types, among which Figure 10 (a) is a hemispherical uniform distribution, Figure 10 (b) is a Gaussian distribution, Figure 10 (c) is a rectangular distribution, and Figure 10 (d) is a Lambert distribution. When the excitation light and the phosphorescence generated by the excitation propagate in the coating, they will be affected by the scattering effect and change the propagation direction, making the spatial distribution of phosphorescence have a certain randomness. At the same time, the refraction effect on the coating surface further increases this effect. The study of the influencing mechanism of the spatial distribution characteristics of phosphorescence is the basis for solving and optimizing its spatial distribution law. To solve the above problems, it is necessary to build a phosphorescence spatial signal testing platform, prepare phosphorescent coatings with different thicknesses and surface properties, and test the phosphorescence spatial distribution laws of the prepared coatings respectively, so as to provide a data basis for the subsequent establishment of an internal optical scattering model of the coating and analysis of its influence mechanism on the signal spatial distribution characteristics.

[0093] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0094] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM may be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0095] The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. The non-relational database may include a distributed database based on blockchain, etc., but is not limited thereto. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but is not limited thereto.

[0096] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0097] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application; at the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A continuous measurement device for the spatial distribution characteristics of phosphorescence signals, characterized in that: The continuous measurement device for the spatial distribution characteristics of phosphorescence signals comprises: a light source module, a detector module, a rotating bracket module and a vertical angle detection optical path module; The rotating bracket module is used to rotate the light source module and the detector module; The vertical angle detection optical path module includes a dichroic mirror; The dichroic mirror is used to reflect the incident light onto the phosphorescent coating when the incident light emitted by the light source module is incident within a preset angle range, and transmit the phosphorescent signal emitted by the phosphorescent coating; The detector module is used to obtain the phosphorescence signal emitted by the phosphorescent coating to complete continuous measurement.

2. The continuous measurement device for the spatial distribution characteristics of phosphorescence signals according to claim 1, characterized in that: The preset angle range is -5° to 5°.

3. The continuous measurement device for the spatial distribution characteristics of phosphorescence signals according to claim 1, characterized in that: The dichroic mirror is a 355nm dichroic mirror; the 355nm dichroic mirror is arranged directly below the detector module and forms an angle of 45° with the detector module.

4. The continuous measurement device for the spatial distribution characteristics of phosphorescence signals according to claim 1, characterized in that: The continuous measurement device for the spatial distribution characteristics of phosphorescence signals also includes: an optical platform; The rotating bracket module includes a sample rotating stage, a sample vertical displacement stage, a light source vertical adjustment bracket, a detector rotating motor and a detector adjustment bracket; The sample rotating stage is fixed on the optical platform, and the detector rotating motor and the detector adjusting bracket are connected to the sample rotating stage in sequence; the sample rotating stage and the sample vertical displacement stage are coaxially fixed on the detector adjusting bracket.

5. The continuous measurement device for the spatial distribution characteristics of phosphorescence signals according to claim 4, characterized in that: The light source module includes a laser light source, a light source optical fiber and a collimating lens; One side of the collimating lens is fixed on the light source vertical adjustment bracket, and the other side of the collimating lens is connected to the light source optical fiber; The laser light source is connected to the light source optical fiber via an optical path.

6. The continuous measurement device for the spatial distribution characteristics of phosphorescence signals according to claim 5, characterized in that: The vertical angle detection optical path module also includes a 355nm high-pass filter; The 355nm high-pass filter is connected to the port of the collimating lens through a clamp.

7. The continuous measurement device for the spatial distribution characteristics of phosphorescence signals according to claim 4, characterized in that: The detector module includes a fiber optic spectrometer, a detection optical fiber, a light receiving lens and a filter; The filter is fixed to the port of the light-collecting lens by a clamp; One side of the light-collecting lens is fixed on the detector adjustment bracket, and the other side of the light-collecting lens is connected to the detection optical fiber.

8. The continuous measurement device for the spatial distribution characteristics of phosphorescence signals according to claim 7, characterized in that: The 355nm dichroic mirror is arranged above the detection optical fiber.

9. The continuous measurement device for the spatial distribution characteristics of phosphorescence signals according to claim 4, characterized in that: The 355nm dichroic mirror is fixed on the detector adjustment bracket by a clamp.

10. The continuous measurement device for the spatial distribution characteristics of phosphorescence signals according to claim 4, characterized in that: The light source vertical adjustment bracket has a vertical lifting stroke of 300mm and a zenith angle rotation control range of 0-180°; The detector adjustment bracket has a vertical lifting stroke of 600mm, a zenith angle rotation control range of 0-180°, and an azimuth angle rotation control range of 0-360°; The sample rotating platform has a vertical lifting stroke of 600 mm and an azimuth rotation control range of 0-360°.

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