System for automatically detecting combustion characteristics of solid fuel in high-pressure environment

Abstract

The invention provides a system for automatically detecting combustion characteristics of solid fuel in a high-pressure environment. Comprising a combustion chamber, an automatic feeding device, an optical processing device, an ignition device, a pressure measuring device and a control device. The automatic feeding device is located at the bottom of the combustion chamber, and the optical measurement system composed of the high-speed camera and the spectrograph is arranged outside an observation window of the high-pressure cavity and monitors the combustion process in real time through the observation window. During operation, fuel to be detected only needs to be put into the charging hole of the rotary table of the automatic feeding device, the system can automatically supply gas into the combustion chamber, and accurate control over target pressure and atmosphere is achieved by adjusting the electromagnetic valve. And then, the laser ignition device ignites the fuel, and the optical measurement device synchronously collects combustion data. After one-time combustion diagnosis is completed, the automatic feeding device can send new fuel to an ignition position, and the system automatically enters the next-time combustion diagnosis process. The method has the advantages of being high in detection precision, easy and convenient to operate, high in universality and the like, meanwhile, machining obstacles are small, and the engineering application prospect is wide.

Description

Technical Field

[0001] The present application relates to the technical field of combustion diagnosis in high-pressure environments, and in particular to a system for automatically detecting the combustion characteristics of solid fuels in high-pressure environments. Background Art

[0002] With the continued growth of global energy demand and increasingly stringent environmental protection requirements, the study and optimization of the combustion process of solid fuels (such as coal and high-energy metal particles) has become a key research topic in the energy field. In particular, under high-pressure environments (>10 MPa), solid fuel combustion exhibits unique physical and chemical properties. Its combustion efficiency directly affects the economic efficiency of energy utilization, while pollutant emissions from combustion products are closely related to environmental sustainability.

[0003] However, traditional solid fuel combustion detection methods primarily rely on contact sensors, which are susceptible to physical damage in high-pressure environments and suffer from limited measurement accuracy, making them difficult to meet the demands of high-precision monitoring. Furthermore, traditional methods often require manual operation, which is not only inefficient but also poses safety risks, particularly in high-pressure testing environments that pose a threat to operator safety. Furthermore, traditional methods struggle to achieve real-time, continuous monitoring of the combustion process, severely limiting our understanding and optimization of combustion characteristics.

[0004] With the development of optical technology, optical diagnostic methods for solid fuel combustion have gradually become an important means of combustion research due to their advantages such as non-contact, high precision, and real-time performance. By capturing spectral information during the combustion process, optical diagnostic technology can obtain key parameters such as combustion temperature, component concentration, and flame structure, providing a new approach for monitoring and optimizing the combustion process. However, existing optical diagnostic systems for solid fuel combustion can only operate under normal pressure or low pressure environments and are difficult to adapt to the needs of high-pressure combustion environments. In addition, these systems are often complex in structure, cumbersome to operate, and difficult to achieve automation and intelligence, which limits their widespread promotion in practical applications.

[0005] Therefore, there is an urgent need for a system for automatically detecting the combustion characteristics of solid fuels under high pressure environments to solve the technical problems existing in the existing technology to a certain extent. Summary of the Invention

[0006] The purpose of this application is to provide a system for automatically detecting the combustion characteristics of solid fuels under high pressure conditions, which can solve the above-mentioned technical problems existing in the prior art to a certain extent.

[0007] The present application provides a system for automatically detecting the combustion characteristics of solid fuels under high pressure conditions; comprising a combustion chamber, an automatic loading device, an optical processing device, an ignition device, a pressure measuring device, and a control device;

[0008] The automatic loading device is used to load fuel, which is arranged in the combustion chamber and is in communication with the control device; the control device can control the start and stop of the automatic loading device to move the fuel to the ignition position;

[0009] The ignition device includes a laser emitting portion and a laser transmitting portion; the laser emitting portion is used to emit laser light, and the laser transmitting portion is used to transmit the laser light to the fuel at the ignition position to ignite the fuel;

[0010] The optical processing device is arranged outside the combustion chamber, and includes an image capturing unit, a light intensity capturing unit, and a temperature capturing unit; the image capturing unit is capable of capturing an image of the fuel during combustion, the light intensity capturing unit is capable of capturing the light intensity during combustion, and the temperature capturing unit is capable of capturing the temperature during combustion;

[0011] The pressure measuring device is capable of measuring the pressure in the combustion chamber and collecting pressure fluctuation data when the fuel is combusted.

[0012] In the above technical solution, further, the automatic feeding device includes a steering gear, an engaging portion and a feeding tray;

[0013] The feeding tray is provided with a plurality of feeding parts;

[0014] The output shaft of the servo is connected to the feeding part through the meshing part, and the servo can drive the feeding tray to rotate through the meshing part, so that one of the feeding parts on the feeding tray is coaxial with the ignition position.

[0015] In the above technical solution, further, the meshing portion includes a first-stage gear, a second-stage gear, a third-stage gear, a fourth-stage gear and a fifth-stage gear;

[0016] The first-stage gear is sleeved on the output end of the servo, the second-stage gear is coaxial with the third-stage gear, and the first-stage gear is meshed with the second-stage gear;

[0017] The five-stage gear is coaxial with the feeding tray, and the five-stage gear is meshed with the three-stage gear through the four-stage gear.

[0018] In the above technical solution, further, the automatic loading device also includes a dust cover;

[0019] The dustproof cover plate covers the feeding tray, and a through hole capable of passing the laser is opened on the dustproof cover plate at a position corresponding to the ignition position.

[0020] In the above technical solution, further, the combustion chamber includes a first shell, an observation window and a glass hole;

[0021] The first shell is surrounded by an installation space, the automatic loading device is arranged in the installation space, and the first shell is provided with a glass hole corresponding to the ignition position;

[0022] A plurality of observation windows are provided, and the plurality of observation windows are arranged at intervals along the circumferential direction of the first shell.

[0023] In the above technical solution, further, the image capture unit includes a high-speed camera, a first filter and an attenuation plate; the light intensity capture unit includes a spectrometer; the temperature capture unit includes a multi-wavelength colorimetric thermometer and a synchronizer;

[0024] The high-speed camera is disposed outside the combustion chamber and is aimed at one of the observation windows of the combustion chamber to photograph the combustion state of the fuel; the first filter and the attenuation plate are spaced apart and disposed between the high-speed camera and the observation window, with the attenuation plate close to the high-speed camera and the first filter close to the observation window;

[0025] The spectrometer is arranged outside the combustion chamber and measures the spectral lines in the combustion chamber through another observation window of the combustion chamber;

[0026] The multi-wavelength colorimetric thermometer is arranged outside the combustion chamber and measures the temperature inside the combustion chamber through another observation window of the combustion chamber;

[0027] The synchronizer is respectively connected to the high-speed camera, the spectrometer, the multi-wavelength colorimetric thermometer and the control device for communication; the control device can control the high-speed camera, the spectrometer and the multi-wavelength colorimetric thermometer for synchronous detection through the synchronizer.

[0028] In the above technical solution, further, the ignition device includes a continuous or pulsed laser, a total reflective mirror and a dichroic mirror;

[0029] The continuous or pulsed laser can emit the laser, which passes through the total reflection mirror and the dichroic mirror in sequence, and is emitted to the fuel at the ignition position through the glass hole and the through hole to ignite the fuel.

[0030] In the above technical solution, further, the detection device includes a pressure sensor and a light source;

[0031] The pressure sensor is provided in the combustion chamber, and is used to detect and collect pressure fluctuation data in the combustion chamber when the fuel is burning;

[0032] The light source is disposed in the combustion chamber and is used to provide light to the combustion chamber.

[0033] In the above technical solution, further, the system for automatically detecting the combustion characteristics of solid fuel under high pressure environment further includes an air intake device; the air intake device is connected to the combustion chamber and is used to conduct the gas required for the combustion of the fuel to the combustion chamber;

[0034] The air intake device includes a high-pressure gas cylinder, an air intake pressure reducing valve, a buffer tank, an air intake solenoid valve, a safety valve and a mass flow controller which are connected in sequence; the mass flow controller is close to the combustion chamber.

[0035] In the above technical solution, further, the system for automatically detecting the combustion characteristics of solid fuels under high pressure environment further includes an exhaust device; the exhaust device is connected to the combustion chamber and is used to discharge the gas generated by combustion in the combustion chamber;

[0036] The exhaust device includes an exhaust pressure reducing valve and an exhaust solenoid valve connected in sequence, and the exhaust pressure reducing valve is close to the combustion chamber.

[0037] In the above technical solution, further, the system for automatically detecting the combustion characteristics of solid fuels under high pressure environment also includes a vacuum device, which is connected to the combustion chamber and is used to vacuum the combustion chamber.

[0038] Compared with the prior art, this application has the following beneficial effects:

[0039] The present application provides a system for automatically detecting the combustion characteristics of solid fuels under high pressure conditions; comprising a combustion chamber, an automatic loading device, an optical processing device, an ignition device, a pressure measuring device, and a control device;

[0040] The automatic loading device is used to load fuel, which is arranged in the combustion chamber and is in communication with the control device; the control device can control the start and stop of the automatic loading device to move the fuel to the ignition position;

[0041] The ignition device includes a laser emitting portion and a laser transmitting portion; the laser emitting portion is used to emit laser light, and the laser transmitting portion is used to transmit the laser light to the fuel at the ignition position to ignite the fuel;

[0042] The optical processing device is arranged outside the combustion chamber, and includes an image capturing unit, a light intensity capturing unit, and a temperature capturing unit; the image capturing unit is capable of capturing an image of the fuel during combustion, the light intensity capturing unit is capable of capturing the light intensity during combustion, and the temperature capturing unit is capable of capturing the temperature during combustion;

[0043] The pressure measuring device is capable of measuring the pressure in the combustion chamber and collecting pressure fluctuation data when the fuel is combusted.

[0044] In summary, this application provides a novel measurement device in the field of automated solid fuel combustion diagnosis technology. This innovatively incorporates automated equipment into a high-pressure combustion diagnostic system, ensuring automatic sample exchange and in-situ testing under consistent operating conditions, significantly improving experimental consistency and reliability. Furthermore, this device significantly reduces the time required for multiple, large-volume experiments, effectively improving experimental efficiency and speed.

[0045] Furthermore, the present invention enables accurate automatic combustion diagnosis in high-pressure environments, surpassing the pressure limitations of traditional measurement techniques. Furthermore, the introduction of automated equipment completely eliminates the need for close-range manual operation, significantly reducing safety risks in high-pressure gas experiments and providing greater safety for experimenters.

[0046] Furthermore, the use of a variety of advanced optical observation and diagnostic equipment and pressure measurement equipment enables multi-dimensional analysis of the entire fuel combustion process, including images, spectra, combustion temperature, and pressure, all on the same time scale. This multi-angle, comprehensive measurement approach provides a new path for in-depth exploration of combustion mechanisms, breaking through the limitations of traditional single-measurement methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0048] Figure 1 A schematic diagram of the structure of the system for automatically detecting the combustion characteristics of solid fuels under high pressure provided by this application;

[0049] Figure 2 This is a schematic diagram of the structure of the combustion chamber and automatic loading device in the system for automatically detecting the combustion characteristics of solid fuels under high pressure provided by this application, from a first perspective;

[0050] Figure 3 This is a schematic diagram of the structure of the combustion chamber and automatic loading device in the system for automatically detecting the combustion characteristics of solid fuels under high pressure environment from a second perspective;

[0051] Figure 4 for Figure 2 or Figure 3 A schematic diagram of the structure in which the first housing and the high-speed camera are hidden;

[0052] Figure 5This is a schematic structural diagram of the automatic loading device in the system for automatically detecting the combustion characteristics of solid fuels under high pressure provided by this application, from a first perspective;

[0053] Figure 6 This is a schematic structural diagram of the automatic loading device in the system for automatically detecting solid fuel combustion characteristics under high pressure provided by the present application, hiding the second shell and viewed from a first perspective;

[0054] Figure 7 This is a schematic structural diagram of the automatic loading device in the system for automatically detecting solid fuel combustion characteristics under high pressure provided by the present application, hiding the second shell and viewed from a second perspective;

[0055] Figure 8 for Figure 7 Schematic diagram of the structure of the dust cover;

[0056] Figure 9 This is a schematic structural diagram of the automatic loading device hiding the second shell and the dust cover in the system for automatically detecting the combustion characteristics of solid fuels under high pressure provided in this application.

[0057] Reference numerals: 1 - combustion chamber; 101 - first housing; 102 - observation window; 103 - glass hole;

[0058] 2-Automatic loading device; 201-Servo; 202-First gear; 203-Second gear; 204-Transmission shaft; 205-Third gear; 206-Fourth gear; 207-Five gear; 208-Feeding tray; 209-Dust cover; 210-Second housing; 211-Bearing; 212-Through hole; 213-Charging hole; 214-Meshing portion; 215-Feeding portion;

[0059] 3- Optical processing device; 301- High-speed camera; 302- Spectrometer; 303- Multi-wavelength colorimetric thermometer; 304- First filter; 305- Attenuator; 306- Synchronizer; 307- Adapter plate; 308- Second filter; 309- Third filter; 310- Image capture unit; 311- Light intensity capture unit; 312- Temperature capture unit;

[0060] 4- ignition device; 401- continuous or pulsed laser; 402- total reflective mirror; 403- dichroic mirror; 404- laser emitting unit; 405- laser transmission unit;

[0061] 6-pressure measuring device; 601-pressure sensor; 602-light source;

[0062] 7-air intake device; 701-high-pressure gas cylinder; 702-air intake pressure reducing valve; 703-buffer tank; 704-air intake solenoid valve; 705-safety valve; 706-mass flow controller;

[0063] 8-exhaust device; 801-exhaust pressure reducing valve; 802-exhaust solenoid valve;

[0064] 9-control device; 901-computer;

[0065] 10-vacuum pump; 1001-vacuum pump; 1002-vacuum solenoid valve; DETAILED DESCRIPTION

[0066] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent upon understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, except for operations that must occur in a particular order, changes may be made that will be apparent upon understanding the disclosure of this application. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity.

[0067] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0068] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, it may be directly “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on,” “directly connected to,” “directly coupled to,” “directly over,” or “directly covering” another element, there may be no other elements intervening therebetween.

[0069] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0070] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, component, region, layer, or portion in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.

[0071] For ease of description, spatial relational terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element would subsequently be located "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientations "above" and "below," depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., swung 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0072] The terms used herein are intended only to describe various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular is intended to include the plural. The terms "comprise," "include," and "have" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0073] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.

[0074] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0075] The present application provides a system for automatically detecting the combustion characteristics of solid fuels under high-pressure conditions, in which the automatic feeding device 2 is located at the bottom of the combustion chamber 1, and the optical processing device 3 composed of a high-speed camera 301, a spectrometer 302 and a multi-wavelength colorimetric thermometer 303 is arranged outside the combustion chamber 1, and the combustion process is monitored in real time through the observation window 102. During operation, it is only necessary to put the fuel to be tested into the feeding tray 208 of the automatic feeding device 2, and the control device 9 can automatically supply air to the combustion chamber 1, and the target pressure and atmosphere can be precisely controlled by adjusting the air intake solenoid valve 704. Subsequently, the ignition device 4 ignites the fuel, and the optical processing device 3 synchronously collects combustion data. After completing a combustion diagnosis, the automatic feeding device 2 can deliver the new fuel to the ignition position, and the system automatically enters the next combustion diagnosis process. The following is combined with Figures 1-9 The present application provides a system for automatically detecting the combustion characteristics of solid fuels under high pressure.

[0076] Combine Figure 1 As shown, the system for automatically detecting the combustion characteristics of solid fuel under high pressure environment includes a combustion chamber 1, an automatic feeding device 2, an optical processing device 3, an ignition device 4, a pressure measuring device 6 and a control device 9.

[0077] Combine Figure 2 and Figure 3 As shown, the combustion chamber 1 comprises a first housing 101, made of 314 stainless steel and capable of withstanding high-temperature and high-pressure combustion experiments. The overall cylindrical shape is surrounded by a mounting space, with four observation windows 102 equally spaced around the perimeter, along with ventilation holes and pipe connections. A glass hole 103 is located at the top for laser ignition. Specifically, the circumferential sidewalls of the combustion chamber 1 are provided with holes, which are covered with aluminosilicate glass to form glass observation windows 102. Furthermore, the top of the combustion chamber 1 also has holes, which are covered with glass to form glass holes 103.

[0078] Combine Figure 4 As shown, an automatic loading device 2 for loading fuel is provided in the installation space; and an ignition position is provided in the installation space. Figure 5-Figure 7 As shown, the automatic loading device 2 includes a steering gear 201, a meshing portion 214, and a feed tray 208. The feed tray 208 has multiple feed portions 215. The output shaft of the steering gear 201 is connected to the feed portions 215 via the meshing portion 214. The steering gear 201, through the meshing portion 214, can drive the feed tray 208 to rotate, so that one of the feed portions 215 on the feed tray 208 is coaxial with the ignition position. In addition, the glass hole 103 corresponds to the ignition position. In this way, when the ignition device 4 described below is used for ignition, the fuel at the ignition position can be ignited through this glass hole 103.

[0079] In the present application, the fuel is a solid fuel, such as coal, biomass, metallic aluminum, magnesium, iron, boron, etc.

[0080] Further, combined with Figure 5-Figure 7 As shown, the meshing portion 214 includes a primary gear 202, a secondary gear 203, a tertiary gear 205, a fourth gear 206, and a fifth gear 207. The primary gear 202 is mounted on the output end of the servo 201, while the secondary gear 203 and the third gear 205 are coaxial and meshingly connected. The fifth gear 207 is coaxial with the feed tray 208 and meshes with the third gear 205 via the fourth gear 206. Furthermore, the secondary gear 203 and the third gear 205 are mounted on the same transmission shaft 204. The transmission shaft 204 is secured to the second housing 210 via a bearing 211.

[0081] Furthermore, the automatic loading device 2 also includes a second housing 210, which has a bottom plate, side plates, and a top plate, and the bottom plate, side plates, and top plate are surrounded by a storage space capable of mounting the servo 201, the feed tray 208, and the meshing portion 214. The second housing 210 is a metal housing, and its bottom plate is fixed to the bottom wall of the combustion chamber 1 by a fixing structure (the fixing structure herein is, for example, a fixing buckle structure). The feed tray 208 is fixed to a position on the bottom plate near the center of the high-pressure combustion chamber 1, and the feed portion 215 on the feed tray 208 is coaxial with the bottom of the combustion chamber 1. The servo 201 is fixed to a position on the bottom plate near the edge of the high-pressure combustion chamber 1.

[0082] Further, combined with Figure 7 As shown, the feeding tray 208 is circular, and the feeding parts 215 are arranged at equal intervals on the circular feeding tray 208. Figure 8 As shown, optionally, the feeding portion 215 is a charging hole 213 formed on the feeding tray 208. Preferably, there are 5 charging holes 213. Figure 8 As shown, the automatic feeding device 2 also includes a dust cover 209; considering that the feeding tray 208 is circular, the dust cover 209 is also circular, and the size of the dust cover 209 is slightly larger than the size of the feeding tray 208, so as to ensure that the dust cover can completely cover the feeding tray 208. In addition, a through hole 212 that can pass the laser is provided at the position corresponding to the ignition position on the dust cover 209. In addition, the dust cover 209 is fixed to the second shell 210 by bolts. In actual use, the dust cover 209 is disassembled and assembled after each manual loading is completed. The above-mentioned dust cover 209 can effectively prevent the smoke generated during the combustion process from contaminating the unburned fuel, ensuring the cleanliness of the experimental environment and the purity of the fuel.

[0083] Furthermore, the automatic loading device 2 is communicatively connected to a control device 9; the control device 9 can control the start and stop of the automatic loading device 2 to ensure that the fuel is moved to the ignition position. Alternatively, the start and stop of the automatic loading device 2 can be independently controlled by a single-chip microcomputer whose control board is an STM32f103. Furthermore, the servo 201 is a 20kg high-torque servo 201, powered by a high-temperature resistant 3A lithium battery with a supply voltage between 3.7V and 6V. It is equipped with a Bluetooth module and is controlled by a computer Bluetooth to control the timed rotation of the servo 201.

[0084] In summary, the automatic loading device 2 is used to load fuel, which is arranged in the combustion chamber 1 and is in communication with the control device 9; the control device 9 can control the start and stop of the automatic loading device 2 to move the fuel to the ignition position.

[0085] Combine Figure 1 As shown, the ignition device 4 includes a laser emitting unit 404 and a laser transmitting unit 405. The laser emitting unit 404 is used to emit laser light, and the laser transmitting unit 405 is used to transmit the laser light to the fuel at the ignition position to ignite the fuel. Specifically, the ignition device 4 includes a continuous or pulsed laser 401, a total reflector 402, and a dichroic mirror 403. The continuous or pulsed laser 401 is capable of emitting the laser light, which then passes through the total reflector 402 and the dichroic mirror 403, and then through the glass hole 103 and the through hole 212 to the fuel at the ignition position to ignite the fuel. That is, the laser light emitted by the continuous or pulsed laser 401 is raised by the total reflector 402, reflected by the dichroic mirror 403 to the glass hole 103 at the top of the combustion chamber 1, passes through the through hole 212, and ignites the fuel.

[0086] Combine Figure 1 As shown, the optical processing device 3 is arranged outside the combustion chamber 1, and includes an image capturing unit 310, a light intensity capturing unit 311, and a temperature capturing unit 312; the image capturing unit 310 can capture images of the fuel during combustion, the light intensity capturing unit can capture the light intensity during combustion, and the temperature capturing unit can capture the temperature during combustion.

[0087] Specifically, the image capture unit 310 includes a high-speed camera 301, a first optical filter 304, and an attenuation plate 305. The high-speed camera 301 is positioned outside the combustion chamber 1 and is aligned with one of the observation windows 102 in the combustion chamber 1 to capture the combustion state of the fuel. The first optical filter 304 and the attenuation plate 305 are spaced apart and positioned between the high-speed camera 301 and the observation window 102, with the attenuation plate 305 positioned closer to the high-speed camera 301 and the first optical filter 304 closer to the observation window 102. The first optical filter 304 prevents the laser's infrared wavelength from damaging the high-speed camera 301, while the attenuation plate 305 prevents overexposure.

[0088] Specifically, the light intensity capture unit 311 includes a spectrometer 302; the temperature capture unit 312 includes a multi-wavelength colorimetric thermometer 303 and a synchronizer 306. The spectrometer 302 is located outside the combustion chamber 1 and measures the spectral lines within the combustion chamber 1 through another observation window 102 of the combustion chamber 1. The multi-wavelength colorimetric thermometer 303 is located outside the combustion chamber 1 and measures the temperature within the combustion chamber 1 through yet another observation window 102 of the combustion chamber 1. The synchronizer 306 is communicatively connected to the high-speed camera 301, the spectrometer 302, the multi-wavelength colorimetric thermometer 303, and the control device 9. The control device 9, through the synchronizer 306, can control the high-speed camera 301, the spectrometer 302, and the multi-wavelength colorimetric thermometer 303 to perform synchronous detection.

[0089] Furthermore, a second filter 308 and a third filter 309 are provided in front of the multi-wavelength colorimetric thermometer 303 to capture the radiation intensity of the corresponding wavelengths. In addition, the light intensity capture unit 311 also includes a fiber optic light adapter plate 307, which serves to fix the optical fiber.

[0090] In summary, the optical processing device 3 comprises an image capture unit 310, a light intensity capture unit 311, and a temperature capture unit 312. A high-speed camera 301 is fixed to the exterior of the high-pressure combustion chamber 1, with its lens aimed at one of the observation windows 102 in the chamber. A first filter 304 and an attenuation plate 305 are positioned between the lens and the observation window 102, enabling recording of the entire combustion process. A spectrometer 302 and a multi-wavelength colorimetric thermometer 303 are also fixed to the exterior of the high-pressure combustion chamber 1. Both these instruments measure the flame emission spectrum and temperature within the chamber 1 through the observation window 102, while the spectrometer 302 analyzes the combustion products and structure.

[0091] Combine Figure 1 As shown, the pressure measuring device 6 is capable of measuring the pressure within the combustion chamber 1 and collecting data on pressure fluctuations during fuel combustion. Specifically, the detection device includes a pressure sensor 601 and a light source 602. The pressure sensor 601 is disposed within the combustion chamber 1 and is used to detect and collect data on pressure fluctuations within the combustion chamber 1 during fuel combustion. The light source 602 is disposed within the combustion chamber 1 and is used to provide light to the combustion chamber 1.

[0092] Combine Figure 1 As shown, the system for automatically detecting the combustion characteristics of solid fuels under high pressure environment also includes an air intake device 7; the air intake device 7 is connected to the combustion chamber 1, and is used to conduct the gas required for fuel combustion to the combustion chamber 1; the air intake device 7 includes a high-pressure gas cylinder 701, an air intake pressure reducing valve 702, a buffer tank 703, and an air intake solenoid valve 704 connected in sequence; a safety valve 705 and a mass flow controller 706; the mass flow controller 706 is close to the combustion chamber 1.

[0093] Specifically, high-pressure gas cylinder 701 stores the gas required for fuel combustion, typically nitrogen or oxygen. Inlet pressure reducing valve 702 reduces the higher input pressure to the required stable output pressure. A buffer tank 703 temporarily stores the output gas. Inlet solenoid valve 704 and mass flow controller 706 control the flow of gas. A safety valve 705 protects the intake device 7 from high pressure damage. The mass flow controller 706 is directly connected to the combustion chamber 1 to precisely control the gas flow.

[0094] Combine Figure 1 As shown, the system for automatically detecting solid fuel combustion characteristics under high pressure also includes an exhaust device 8; the exhaust device 8 is connected to the combustion chamber 1 and is used to discharge gases generated by combustion in the combustion chamber 1. The exhaust device 8 includes an exhaust pressure reducing valve 801 and an exhaust solenoid valve 802, which are connected in sequence. The exhaust pressure reducing valve 801 is close to the combustion chamber 1.

[0095] Combine Figure 1 As shown, the system for automatically detecting the combustion characteristics of solid fuels under high pressure also includes a vacuum device 10, which is connected to the combustion chamber 1 and is used to evacuate the combustion chamber 1. Specifically, the vacuum device 10 includes a vacuum pump 1001 and a vacuum solenoid valve 1002; the vacuum pump 1001 is connected to the combustion chamber 1 through the vacuum solenoid valve 1002, and is used to evacuate the combustion chamber 1.

[0096] Combine Figure 1 As shown, the control device 9 includes a computer 901, which is connected to the steering engine 201, the high-speed camera 301, the spectrometer 302, and the multi-wavelength colorimetric thermometer 303 to obtain data.

[0097] Based on the above device, there is a method for automatically detecting the combustion characteristics of solid fuel under high pressure environment:

[0098] Step 100: Ensure all devices are properly installed and powered, and maintain a normal connection to computer 901. Load the fuel to be burned into the loading container and place it on the feeding disc. Install the dust shield. After loading, seal the high-pressure combustion chamber 1. Turn on vacuum pump 1001 and vacuum solenoid valve 1002, evacuate the high-pressure combustion chamber 1, and then close it.

[0099] Step 200: Open the high-pressure gas cylinder 701 and the air pressure reducing valve 702. The gas pressure is controlled by adjusting the air pressure reducing valve 702, and the gas flow rate is regulated by the mass flow controller 706, allowing the gas to enter the combustion chamber 1. Step 300: After the above preparatory steps are completed, the computer 901, through software synchronization, initially issues a start command to the automatic loading device 2, the high-speed camera 301, the spectrometer 302, and the multi-wavelength colorimetric thermometer 303. One second later, the computer 901 further controls the continuous or pulsed laser 401 to activate, emitting laser light at the fuel, completing the first ignition operation.

[0100] Step 400: During the fuel combustion process, pressure sensor 601 collects data on pressure fluctuations. High-speed camera 301, spectrometer 302, and multi-wavelength colorimetric thermometer 303 capture images of the fuel combustion, as well as information such as light intensity and temperature. After the first combustion completes, spectrometer 302 detects a drop in the combustion light intensity signal to a certain level and automatically transmits a signal to computer 901. Computer 901 then controls the automatic feeding device to rotate the feeding disk, delivering the second sample to be tested to the ignition position, and repeats the same measurement steps.

[0101] Step 500: After all samples have completed the combustion test, the computer 901 controls the solenoid valve and the exhaust pressure reducing valve 801 of the exhaust line to open, adjusts the pressure in the combustion chamber 1 to atmospheric pressure, and completes all experiments.

[0102] In summary, this application provides a novel measurement device in the field of automated solid fuel combustion diagnosis technology. This innovatively incorporates automated equipment into a high-pressure combustion diagnostic system, ensuring automatic sample exchange and in-situ testing under consistent operating conditions, significantly improving experimental consistency and reliability. Furthermore, this device significantly reduces the time required for sample exchange in multiple, large-volume experiments, effectively improving experimental efficiency and speed.

[0103] Furthermore, the present invention enables accurate automatic combustion diagnosis in high-pressure environments, surpassing the pressure limitations of traditional measurement techniques. Furthermore, the introduction of automated equipment completely eliminates the need for close-range manual operation, significantly reducing safety risks in high-pressure gas experiments and providing greater safety for experimenters.

[0104] Furthermore, the use of a variety of advanced optical observation and diagnostic equipment and pressure measurement equipment enables multi-dimensional analysis of the entire fuel combustion process, including images, spectra, combustion temperature, and pressure, all on the same time scale. This multi-angle, comprehensive measurement approach provides a new path for in-depth exploration of combustion mechanisms, breaking through the limitations of traditional single-measurement methods.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A system for automatically detecting the combustion characteristics of solid fuels under high pressure; characterized in that: It includes a combustion chamber, an automatic loading device, an optical processing device, an ignition device, a pressure measuring device and a control device; The automatic loading device is used to load fuel, which is arranged in the combustion chamber and is in communication with the control device; the control device can control the start and stop of the automatic loading device to move the fuel to the ignition position; The ignition device includes a laser emitting portion and a laser transmitting portion; the laser emitting portion is used to emit laser light, and the laser transmitting portion is used to transmit the laser light to the fuel at the ignition position to ignite the fuel; The optical processing device is arranged outside the combustion chamber, and includes an image capturing unit, a light intensity capturing unit, and a temperature capturing unit; the image capturing unit is capable of capturing an image of the fuel during combustion, the light intensity capturing unit is capable of capturing the light intensity during combustion, and the temperature capturing unit is capable of capturing the temperature during combustion; The pressure measuring device is capable of measuring the pressure in the combustion chamber and collecting pressure fluctuation data when the fuel is combusted.

2. The system for automatically detecting solid fuel combustion characteristics under high pressure environment according to claim 1, characterized in that: The automatic feeding device includes a steering gear, a meshing part and a feeding tray; The feeding tray is provided with a plurality of feeding parts; The output shaft of the servo is connected to the feeding part through the meshing part, and the servo can drive the feeding tray to rotate through the meshing part, so that one of the feeding parts on the feeding tray is coaxial with the ignition position.

3. The system for automatically detecting solid fuel combustion characteristics under high pressure environment according to claim 2, characterized in that: The meshing portion includes a first-stage gear, a second-stage gear, a third-stage gear, a fourth-stage gear and a fifth-stage gear; The first-stage gear is sleeved on the output end of the servo, the second-stage gear is coaxial with the third-stage gear, and the first-stage gear is meshed with the second-stage gear; The five-stage gear is coaxial with the feeding tray, and the five-stage gear is meshed with the three-stage gear through the four-stage gear.

4. The system for automatically detecting solid fuel combustion characteristics under high pressure environment according to claim 2, characterized in that: The automatic feeding device also includes a dust cover; The dustproof cover plate covers the feeding tray, and a through hole capable of passing the laser is opened on the dustproof cover plate at a position corresponding to the ignition position.

5. The system for automatically detecting solid fuel combustion characteristics under high pressure environment according to claim 1, characterized in that: The combustion chamber includes a first shell, an observation window and a glass hole; The first shell is surrounded by an installation space, the automatic loading device is arranged in the installation space, and the first shell is provided with a glass hole corresponding to the ignition position; A plurality of observation windows are provided, and the plurality of observation windows are arranged at intervals along the circumferential direction of the first shell.

6. The system for automatically detecting solid fuel combustion characteristics under high pressure environment according to claim 5, characterized in that: The image capture unit includes a high-speed camera, a first filter and an attenuation plate; the light intensity capture unit includes a spectrometer; the temperature capture unit includes a multi-wavelength colorimetric thermometer and a synchronizer; The high-speed camera is disposed outside the combustion chamber and is aimed at one of the observation windows of the combustion chamber to photograph the combustion state of the fuel; the first filter and the attenuation plate are spaced apart and disposed between the high-speed camera and the observation window, with the attenuation plate close to the high-speed camera and the first filter close to the observation window; The spectrometer is arranged outside the combustion chamber and measures the spectral lines in the combustion chamber through another observation window of the combustion chamber; The multi-wavelength colorimetric thermometer is arranged outside the combustion chamber and measures the temperature inside the combustion chamber through another observation window of the combustion chamber; The synchronizer is respectively connected to the high-speed camera, the spectrometer, the multi-wavelength colorimetric thermometer and the control device for communication; the control device can control the high-speed camera, the spectrometer and the multi-wavelength colorimetric thermometer for synchronous detection through the synchronizer.

7. The system for automatically detecting solid fuel combustion characteristics under high pressure environment according to claim 5, characterized in that: The ignition device includes a continuous or pulsed laser, a total reflective mirror and a dichroic mirror; The continuous or pulsed laser can emit the laser, which passes through the total reflection mirror and the dichroic mirror in sequence, and is emitted to the fuel at the ignition position through the glass hole and the through hole to ignite the fuel.

8. The system for automatically detecting solid fuel combustion characteristics under high pressure environment according to claim 1, characterized in that: The detection device includes a pressure sensor and a light source; The pressure sensor is provided in the combustion chamber, and is used to detect and collect pressure fluctuation data in the combustion chamber when the fuel is burning; The light source is disposed in the combustion chamber and is used to provide light to the combustion chamber.

9. The system for automatically detecting solid fuel combustion characteristics under high pressure environment according to claim 1, characterized in that: The system for automatically detecting the combustion characteristics of solid fuels under high pressure also includes an air intake device; the air intake device is in communication with the combustion chamber and is used to conduct the gas required for the combustion of the fuel to the combustion chamber; The air intake device includes a high-pressure gas cylinder, an air intake pressure reducing valve, a buffer tank, an air intake solenoid valve, a safety valve and a mass flow controller connected in sequence; the mass flow controller is close to the combustion chamber; The system for automatically detecting the combustion characteristics of solid fuels under high pressure environment further includes an exhaust device; the exhaust device is in communication with the combustion chamber and is used to discharge the gas generated by combustion in the combustion chamber; The exhaust device includes an exhaust pressure reducing valve and an exhaust solenoid valve connected in sequence, and the exhaust pressure reducing valve is close to the combustion chamber.

10. The system for automatically detecting solid fuel combustion characteristics under high pressure environment according to claim 1, characterized in that: The system for automatically detecting the combustion characteristics of solid fuels under high pressure further includes a vacuuming device, which is connected to the combustion chamber and is used to vacuum the combustion chamber.

Images