Material ignition effect on-line test system and method thereof

Abstract

The invention relates to a material ignition effect on-line test system and a method thereof, belongs to the technical field of material ignition effect research and application, and solves the technical problems of low heat flow loading level and insufficient material pyrolysis and ignition characteristic on-line test capability in the material ignition effect research process. The test system comprises a heat flow loading subsystem, an effect on-line test subsystem and a combustion chamber. The heat flow loading subsystem is used for applying heat flow irradiation to a to-be-tested material, the effect on-line testing subsystem is used for collecting ignition effect parameters of the to-be-tested material, and the combustion chamber provides an irradiation space for the to-be-tested material. The testing method comprises the steps of self-inspection of the testing system, preparation of a to-be-tested material, placement of the to-be-tested material in the combustion chamber, arrangement of the testing system, arrangement of the heat flow loading system, and acquisition and analysis of material ignition effect data. The device is used for on-line testing of the material ignition effect.

Description

Technical Field

[0001] The invention belongs to the technical field of material ignition effect research and application, and particularly relates to a material ignition effect online testing system and method. Background Art

[0002] In fire science research, the study of apparent pyrolysis kinetics and ignition characteristics of materials is an important branch of science. Most of the existing experimental research equipment has a low level of thermal radiation capability, such as the commonly used cone calorimeter, whose thermal radiation intensity is generally 10W / cm 2 The maximum thermal radiation load of a laboratory-level cone calorimeter can only reach the order of tens of watts per square centimeter. The apparent pyrolysis kinetics and ignition characteristics of materials under strong thermal radiation are different from those under low thermal radiation conditions. The pyrolysis products, heat release, ignition characteristics, etc. are also different. The fundamental reason is that the ignition effect mechanism of materials under different thermal radiation loading conditions is different. If we want to carry out research on the apparent pyrolysis kinetics and ignition characteristics of materials under strong thermal radiation loads, there is a certain gap in the thermal radiation level of existing experimental equipment. At the same time, the existing research systems at home and abroad have certain deficiencies in the online testing capabilities of the pyrolysis products and ignition characteristics of materials under strong thermal radiation loading conditions. Summary of the invention

[0003] In order to overcome the problems of low thermal radiation capability and insufficient online testing capability of effect parameters in material ignition effect testing, the present invention proposes a material ignition effect online testing system and method.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A material ignition effect online testing system comprises a heat flow loading subsystem, an effect online testing subsystem and a combustion chamber.

[0006] The heat flux loading subsystem includes a high heat flux loading device and a low heat flux loading device. The high heat flux loading device is located outside the combustion chamber, and the low heat flux loading device is located inside the combustion chamber.

[0007] The high heat flux loading device is used to provide a high heat flux laser irradiation light source to implement high heat flux laser irradiation on the material to be tested. It includes a high power laser and an imaging system. The high power laser is used to provide high heat flux loading. The imaging system is used to adjust the collimation and magnification of the laser output spot, and is matched with the high power laser to achieve continuous adjustment of the size of the irradiation area on the surface of the material to be tested.

[0008] The low heat flux loading device is a conical heater, which is used to provide a low heat flux broad spectrum light irradiation light source to perform low heat flux broad spectrum light irradiation on the material to be tested.

[0009] The effect online test subsystem is used to collect the ignition effect parameters of the material to be tested, and includes an infrared thermal imager, a gas analyzer, a weighing sensor, a high-speed camera, and a data collector.

[0010] The infrared thermal imager, gas analyzer, high-speed camera, and data collector are located outside the combustion chamber, and the weighing sensor is located inside the combustion chamber. The infrared thermal imager is used to measure the surface temperature of the material to be tested during the irradiation process in real time. The gas analyzer is used to test and analyze the components and concentrations of the pyrolysis gas produced by the material to be tested during the irradiation process in real time. The weighing sensor is used to monitor the mass loss of the material to be tested during the irradiation process in real time. The high-speed camera is used to record the ignition effect process and ignition effect phenomenon of the material to be tested under heat flux irradiation. The data collector is used to store and output the data measured in real time by the gas analyzer and the weighing sensor.

[0011] The combustion chamber is used to provide an irradiation space for the material to be tested, and comprises a door, a window sheet, a combustion table, a smoke exhaust pipe, and a test piece box.

[0012] The door is used as a passage for taking and placing the materials to be tested. The window piece is installed on the door, and is used for the infrared thermal imager to observe the surface temperature of the materials to be tested and to transmit the laser. The combustion table is used to place the materials to be tested, and is located on the upper side of the weighing sensor and the lower side of the heating cone. The placement of the materials to be tested can be adjusted as needed. The exhaust pipe is used to discharge the smoke generated by pyrolysis during the irradiation process; the test box is used to wrap the materials to be tested, and the test surface of the materials to be tested to be irradiated is facing the opening of the test box, and the materials to be tested are placed in the test box.

[0013] In the above-mentioned material ignition effect online testing system, the high-power laser wavelength is 1 μm and the laser output power is 9 kW.

[0014] The light spot size of the irradiation area of ​​the imaging system is adjusted to 3cm×3cm~10cm×10cm.

[0015] In the above-mentioned material ignition effect online testing system, the conical heater is 25cm away from the surface of the material to be tested, and the irradiation intensity range is 0W / cm 2 ~10W / cm 2 The irradiation size adjustment range is 1cm×1cm~10cm×10cm.

[0016] The above-mentioned material ignition effect online testing system, the gas analyzer is located at the sampling tube connected to the smoke exhaust pipe, the measured gas types are oxygen, carbon monoxide, and carbon dioxide, the measurement accuracy of oxygen and carbon monoxide concentrations is 0.01%, and the measurement accuracy of carbon dioxide concentration is 0.1%.

[0017] In the above-mentioned material ignition effect online testing system, the weighing sensor has a measuring range of 0kg to 5kg and a measuring accuracy of 0.01g.

[0018] In the above-mentioned material ignition effect online testing system, the sensor band of the high-speed camera is the visible light band, and the frame rate is 200fps.

[0019] In the above-mentioned material ignition effect online testing system, the data collector has 3 acquisition card slots, 120 single-ended measurement channels, and the data parameter interfaces for data acquisition are Ethernet interface and USB interface.

[0020] The above-mentioned material ignition effect online testing system, the main frame of the hatch is made of stainless steel metal and sprayed with black anti-rust paint, and the size of the hatch is 600mm×600mm.

[0021] In the above-mentioned online testing system for the ignition effect of materials, the window piece is made of fused quartz glass, and a 1μm anti-reflection film is coated on one side of the outer side. The transmittance of 1μm laser is 99%. The window piece is provided with a φ60mm opening, and the opening is used to install a germanium window piece, which is made of germanium and is used for observing the surface temperature of the material to be tested by an infrared thermal imager.

[0022] The combustion table is a steel metal plane for placing the wrapped material to be tested, which can be placed on the combustion table vertically, horizontally or at any inclination angle.

[0023] The specimen box is a steel metal box with one side open, the size of the metal box is 10 cm×10 cm×5 cm, and is used to place the material to be tested.

[0024] A material ignition effect online testing method comprises the following steps:

[0025] Step 1: Online test system self-check

[0026] The material ignition effect online test system performs self-inspection to confirm that it is in normal working condition.

[0027] Step 2: Prepare the materials to be tested

[0028] First, wrap the material to be tested with aluminum foil, exposing the heating surface, and the heating surface is in close contact with one side of the opening of the specimen box.

[0029] Secondly, take out the wrapped material to be tested, and use a weighing sensor to measure and record the weight of the test box and the aluminum foil paper wrapping the material to be tested.

[0030] Again, wrap the material to be tested with aluminum foil again to expose the heating surface, place it on the combustion table, and use a weighing sensor to measure and record the weight of the material to be tested.

[0031] Step 3: Place the material to be tested in the combustion chamber:

[0032] Open the door of the combustion chamber and place the test box containing the material to be tested on the combustion table according to the test requirements.

[0033] Close the hatch.

[0034] Step 4: Test system settings

[0035] Adjust the field of view of the infrared thermal imager and high-speed camera until the entire heated surface of the material to be tested is observed. Set the temperature measurement range and acquisition frame rate of the infrared thermal imager, and set the exposure time and acquisition frame rate of the high-speed camera.

[0036] Turn on the gas analyzer, perform self-test, zero point calibration, and standard point calibration, and turn on the data logger.

[0037] Step 5: Heat flow loading system settings

[0038] When the irradiation intensity is 10W / cm 2 When the above conditions are met, a high heat flux loading device is used for loading. The high heat flux loading device is turned on, the irradiation intensity required to be loaded by the high power laser is set, and the spot size of the imaging system on the surface of the material to be tested is adjusted.

[0039] When the irradiation intensity is 10W / cm 2 When the temperature is below 0.1°C, use the low heat flux loading device to load. Turn on the low heat flux loading device and input the irradiation intensity of the material to be tested.

[0040] Step 6: Data collection and analysis of material ignition effects

[0041] Turn on the data collector, load the heat flux loading subsystem, irradiate the test material, and collect the material ignition effect data.

[0042] After the material ignition effect data collection is completed, the heat flux loading subsystem and data collector are turned off.

[0043] The data collected by the data logger and the test data are analyzed to obtain the material ignition effect parameters.

[0044] In the above-mentioned material ignition effect online testing method, in step 5, when the irradiation intensity is 10W / cm 2 When the temperature is 0.1°C or below, a high heat flux loading device can be used to load the material instead of a low heat flux loading device.

[0045] The beneficial effects of the present invention are:

[0046] A material ignition effect online testing system with a wide range (0~1000W / cm 2)’s irradiation intensity, and the size of the thermal radiation area with high heat flux loading can be continuously adjusted, which provides a larger selection space for the size and irradiation intensity of the irradiated sample and expands the applicability of the system.

[0047] The invention discloses an online testing system for material ignition effect, which has the capability of online testing ignition effect, and can measure the pyrolysis characteristics of materials such as irradiation temperature rise, gas production components and concentration measurement, material quality change, ignition effect phenomena such as ignition time, etc. in real time.

[0048] The invention discloses an online testing system for material ignition effect, which has high integration and modularization level, clear functional positioning of each part and is easy to integrate and expand.

[0049] A material ignition effect online testing method that can achieve 0~1000W / cm 2 The thermal radiation loading can simultaneously meet the needs of conducting research on the pyrolysis apparent kinetics and ignition characteristics of materials under low and high heat flux conditions. At the same time, the online testing method has the ability to test the ignition effect online, and can collect and output the irradiated surface temperature, pyrolysis gas production rate and concentration, mass loss, ignition time, ignition phenomenon and other processes of materials under different thermal radiation conditions in real time. The placement of the materials to be tested can be freely adjusted according to research needs. The degree of modularization and integration is high, and the functions are easy to expand, which can provide a good research system support for studying the pyrolysis apparent kinetics and ignition characteristics of materials under high and low heat flux loading. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 Schematic diagram of the composition of the online testing system for the ignition effect of materials according to an embodiment of the present invention;

[0051] Figure 2 It is a schematic diagram of the structure of an online testing system for material ignition effect according to an embodiment of the present invention.

[0052] Figure numerals: 12. High-power laser, 13. Imaging system, 21. Conical heater, 31. Infrared thermal imager, 32. Gas analyzer, 33. Weighing sensor, 34. High-speed camera, 35. Data collector, 41. Hatch door, 42. Window sheet, 43. Combustion table, 44. Smoke exhaust pipe, 45. Specimen box. DETAILED DESCRIPTION

[0053] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0054] Embodiment 1

[0055] A material ignition effect online testing system includes a high heat flux loading device, a low heat flux loading device, an effect online testing subsystem, and a combustion chamber. Figure 1shown.

[0056] The high heat flux loading device is composed of a high-power laser and an imaging system, which provides a high heat flux uniform laser irradiation light source for the system.

[0057] The low heat flux loading device is composed of a conical heater, which provides a low heat flux uniform broad spectrum light irradiation light source.

[0058] The online ignition effect testing system consists of an infrared thermal imager, a gas analyzer, a weighing sensor, a high-speed camera, a data collector, etc., to realize online testing of the ignition effect of materials.

[0059] The combustion chamber consists of a door, a window, a combustion table, a smoke exhaust pipe, and a specimen box, providing an irradiation test area for materials.

[0060] An online testing system for material ignition effect, such as Figure 2 Its working principle is as follows:

[0061] The high heat flux loading device consists of a high-power laser and an imaging system. Among them, the high-power laser mainly provides high heat flux loading conditions for the system. The laser wavelength can be selected according to actual needs. The recommended wavelength is 1μm, but not limited to the above wavelength. The recommended laser output power is 9kW, but not limited to the above power. The imaging system mainly realizes the collimation and magnification adjustment of the laser output spot, and must be used in conjunction with the laser. The imaging system can realize the continuous adjustment of the irradiation area size on the surface of the irradiated sample. The recommended spot adjustment size of the irradiation area is 3cm×3cm-10cm×10cm, but not limited to the above size.

[0062] The low heat flux loading device consists of a conical heater. When the conical heater is powered on, it can provide a certain intensity of wide-spectrum uniform thermal radiation on the surface of the irradiated sample at a distance of 25cm from the heating cone. The recommended irradiation intensity range is 0-10W / cm 2 , but not limited to the above irradiation intensities, the irradiation size can be adjusted according to the test sample and test requirements, the recommended adjustment range is 1cm×1cm-10cm×10cm, but not limited to the above sizes.

[0063] The effect online test subsystem consists of an infrared thermal imager, a gas analyzer, a weighing sensor, a high-speed camera, a data collector, etc. The infrared thermal imager is used to measure the surface temperature of the irradiated sample and obtain the real-time temperature of the material surface during the irradiation process. The recommended temperature measurement range of the thermal imager is 0-3000℃, but not limited to the above range. The gas analyzer is used to conduct online real-time testing and analysis of the pyrolysis gas components and concentrations during the material irradiation process. The sampling tube is connected to the exhaust pipe to achieve real-time measurement of the smoke gas and concentration through real-time gas sampling. The recommended measurement gas types are oxygen (O2), carbon monoxide (CO), and carbon dioxide (CO2), but not limited to the above gas types. The measurement accuracy of oxygen and carbon monoxide concentration is 0.01%, and the measurement accuracy of gas carbon dioxide concentration is 0.001%, but not limited to the above gas measurement types and measurement accuracy. The weighing sensor is placed under the material to be tested to monitor the mass loss of the material in real time during the irradiation process of the material to be tested. The recommended measurement range of the weighing sensor is 0-5kg, and the measurement accuracy is 0.01g, but not limited to the above range and accuracy. High-speed cameras are used to record the ignition effect process and ignition effect phenomenon of materials under different intensities of heat flux irradiation. The recommended sensor band of high-speed cameras is the visible light band, but not limited to the above bands. The recommended frame rate of high-speed cameras is 200fps, but not limited to the above frame rates. The data collector is used to store and output real-time measured data from gas analyzers, weighing sensors, etc. The recommended number of acquisition card slots is 3, but not limited to the above number. The recommended number of single-ended measurement channels of the data collector is 120, but not limited to the above number. The recommended data parameter interface for data acquisition is Ethernet interface and USB interface, but not limited to the above interface forms.

[0064] The combustion chamber consists of a door, a window, a combustion table, a smoke exhaust pipe, and a test piece box. The main frame of the door is made of stainless steel and sprayed with black anti-rust paint. The recommended size of the door is 600mm×600mm, but not limited to the above size. The door can be flipped to one side and opened. A window is installed in the door frame. The recommended material of the window is fused quartz glass. It is recommended that the outer side of the window be coated with a 1μm anti-reflection film. After coating, the transmittance of the window to 1μm laser can reach 99%, but not limited to the above coating method and transmittance. A φ60mm area is reserved on the window for installing a germanium window to enable the thermal imager to observe the surface temperature of the irradiated sample. The material and size of the window are recommended, but not limited to the above. The combustion table is a steel metal plane placed above the weighing sensor, which is used to place the test piece box containing the material to be tested. The placement of the test box containing the material to be tested can be freely adjusted according to the heating form and research needs. It can be placed vertically, horizontally or at any angle on the combustion table, but it is necessary to ensure that the material to be tested and the opening of the test box are close to the external leakage surface facing the heat flow direction. The optional placement angle greatly expands the research content of this system. The material and size of the combustion table are recommended materials and sizes, but are not limited to the above materials and sizes. The exhaust duct is used to discharge the pyrolysis products during the material irradiation process out of the combustion chamber.

[0065] Embodiment 2

[0066] A material ignition effect online testing method, the specific implementation method is:

[0067] A material ignition effect online testing system includes a high heat flux loading device, a low heat flux loading device, an effect online testing subsystem, and a combustion chamber. Figure 1 shown.

[0068] Step 1: Open the online test system to perform a self-test to confirm whether the status is normal.

[0069] Step 2: First prepare the test piece. Wrap the material to be tested with aluminum foil so that only the heating surface is exposed. At the same time, it must be ensured that the heating surface of the test piece is completely in close contact with the opening side surface of the test box.

[0070] Secondly, after taking out the wrapped specimen again, the empty steel metal specimen box and the aluminum foil paper wrapping the test material specimen are placed on the combustion table and the weight is measured and recorded by the weighing sensor.

[0071] Again, the material to be tested is completely wrapped again according to the first step, and only the heating surface is exposed, and then it is put back into the steel metal specimen box. Again, it is placed on the combustion table, and the weighing sensor weighs and records the weight of the specimen box containing the wrapped material to be tested.

[0072] Step 3: First, open the door of the combustion chamber and place the specimen box containing the material to be tested on the combustion table. The placement of the irradiated sample can be freely adjusted according to the heating form and research requirements. The sample position can be placed vertically, horizontally or at any angle on the combustion table.

[0073] Secondly, after placing the samples according to the experimental requirements, close the cabin door.

[0074] Step 4: Effect online test subsystem settings

[0075] First, adjust the field of view of the thermal imager and high-speed camera to observe the entire heated surface of the sample. The thermal imager should be placed at the φ60mm germanium window installed on the combustion chamber window. Set the temperature measurement range and acquisition frame rate of the thermal imager, and set the exposure time and acquisition frame rate of the high-speed camera and other parameters.

[0076] Secondly, turn on the gas analyzer and complete self-test and calibration of the gas analyzer, including zero point calibration and standard point calibration. After completing the calibration, turn on the data logger and check that it is in normal state.

[0077] Step 5: Determine the required loading heat flux level and loading spot size.

[0078] First, if you need to use 10W / cm 2 For irradiation intensities above 10W / cm2, high heat flux loading devices can be used for loading. 2 For irradiation intensities below 100°, either a high heat loading device or a low heat flux loading device can be used, which can be flexibly selected according to usage requirements.

[0079] Secondly, if a high heat flux loading device is used, after turning on the high-power laser, set the irradiation intensity to be loaded at the laser control end, and manually adjust the imaging system to form the required spot size on the sample surface, and then light irradiation can be performed as needed.

[0080] If a low heat flux loading device is used, after turning on the low heat flux loading device, input the target irradiation intensity at the control end, and the irradiation experiment can be carried out after the conical heater reaches the preset heat flux.

[0081] Step 6: Conduct Fire Effect Experiment

[0082] After setting the irradiation parameters and confirming that the online test system of the effect parameters is normal, the ignition effect experiment can be carried out. Before the experiment, turn on the data acquisition device to collect experimental data. After the experiment, turn off the heat flux loading device, end the data acquisition program, and analyze the data.

[0083] Embodiment 3

[0084] The invention discloses an online testing system for material ignition effect, which is composed of a high heat flux loading device, a low heat flux loading device, an online effect testing subsystem and a combustion chamber.

[0085] The high heat flux loading device is composed of a high power laser and an imaging system. The high heat flux loading device can provide uniform irradiation areas of different heating sizes (including but not limited to 3×3cm-10cm×10cm) and a maximum of 1000W / cm 2 Irradiation intensity: This is the recommended intensity and is not actually limited to this intensity level.

[0086] The low heat flux loading device provides a maximum uniform irradiation spot of 10cm×10cm and (0-10W / cm 2 ) (the above irradiation intensity and size are recommended, but not limited to the above intensity and size). The effect online test subsystem is composed of a thermal imager, a gas analyzer, a weighing sensor, a high-speed camera and a data collector, which can realize the functions of real-time temperature measurement of the material during the heating process, measurement of gas production components and concentration, measurement of material mass change and recording of the ignition effect phenomenon process. The data collector collects, stores and outputs experimental data such as material pyrolysis gas production and mass change.

[0087] The combustion chamber is composed of a door, a window, a combustion table, a smoke exhaust pipe and a specimen box. The door can be flipped outward to open for sample replacement. Window pieces are installed on three sides of the combustion chamber and one side is sealed. The window piece is fused quartz glass, which can pass high-power lasers and is coated with an anti-reflection film on one side. A φ60mm area is opened on the window piece for installing a germanium window piece. The combustion table is a test area for materials to be tested, which is used to place specimen boxes containing materials to be tested and conduct irradiation experiments. The materials to be tested can be placed in different ways. The smoke exhaust pipe discharges the pyrolysis smoke produced during the irradiation process out of the combustion chamber.

[0088] The ignition phenomena of materials under high and low heat fluxes are obviously different, which ultimately lies in the difference in ignition mechanisms. The present invention has completed an ignition effect online testing system that can simultaneously meet two different heating conditions of high and low heat fluxes of materials, greatly expanding the radiation intensity loading capacity of conventional ignition effect research equipment used in laboratories. At the same time, it has online measurement of material ignition effect, and can obtain key effect parameters such as gas production concentration of CO, CO2, material temperature rise history, heat release rate, ignition time, etc. in real time, providing an important experimental system foundation for the study of the ignition effect mechanism of materials under high and low heat flux loading.

Claims

1. A material ignition effect online testing system, characterized in that: Including heat flux loading subsystem, effect online testing subsystem, combustion chamber; The heat flux loading subsystem comprises a high heat flux loading device and a low heat flux loading device; the high heat flux loading device is located outside the combustion chamber, and the low heat flux loading device is located inside the combustion chamber; the high heat flux loading device is used to provide a high heat flux laser irradiation light source, and implements high heat flux laser irradiation on the material to be tested, and comprises a high power laser (12) and an imaging system (13); the high power laser (12) is used to provide high heat flux loading; the imaging system (13) is used to adjust the collimation and magnification of the laser output spot, and is matched with the high power laser (12) to achieve continuous adjustment of the size of the irradiation area on the surface of the material to be tested; the low heat flux loading device is a conical heater (21), and is used to provide a low heat flux broadband light irradiation light source, and implements low heat flux broadband light irradiation on the material to be tested; The effect online test subsystem is used to collect ignition effect parameters of the material to be tested, and comprises an infrared thermal imager (31), a gas analyzer (32), a weighing sensor (33), a high-speed camera (34) and a data collector (35); the infrared thermal imager (31), the gas analyzer (32), the high-speed camera (34) and the data collector (35) are located outside the combustion chamber, and the weighing sensor (33) is located inside the combustion chamber; The infrared thermal imager (31) is used to measure the surface temperature of the material to be tested in real time during the irradiation process; the gas analyzer (32) is used to test and analyze the components and concentrations of the pyrolysis gas produced by the material to be tested in real time during the irradiation process; the weighing sensor (33) is used to monitor the mass loss of the material to be tested in real time during the irradiation process; and the high-speed camera (34) is used to record the ignition effect process and ignition effect phenomenon of the material to be tested under the irradiation of the heat flux; The data collector (35) is used to store and output the data measured in real time by the gas analyzer (32) and the weighing sensor (33); The combustion chamber is used to provide an irradiation space for the material to be tested, and comprises a door (41), a window sheet (42), a combustion table (43), a smoke exhaust pipe (44), and a test piece box (45); the door (41) is used as a passage for taking and placing the material to be tested; The window sheet (42) is installed on the cabin door (41) and is used for the infrared thermal imager (31) to observe the surface temperature of the material to be tested and for laser penetration; the combustion table (43) is used to place the wrapped material to be tested, and is located on the upper side of the weighing sensor (33) and the lower side of the heating cone. The placement of the material to be tested can be adjusted as required; the smoke exhaust pipe (44) is used to exhaust the smoke generated by pyrolysis during the irradiation process; The test box (45) is used to wrap the material to be tested. The material to be tested is placed in the test box with the surface of the material to be tested to be irradiated facing the opening of the test box.

2. The material ignition effect online testing system according to claim 1 is characterized in that: The high power laser (12) has a wavelength of 1 μm and a laser output power of 9 kW; The light spot size of the irradiation area of ​​the imaging system (13) is adjusted to be 3cm×3cm to 10cm×10cm.

3. The material ignition effect online testing system according to claim 1 is characterized in that: The conical heater (21) is 25 cm away from the surface of the material to be tested, and the irradiation intensity ranges from 0 W / cm 2 ~10W / cm 2 The irradiation size adjustment range is 1cm×1cm~10cm×10cm.

4. The material ignition effect online testing system according to claim 1 is characterized in that: The gas analyzer (32) is located at a sampling tube connected to the smoke exhaust pipe (44), and measures the types of gases such as oxygen, carbon monoxide, and carbon dioxide. The measurement accuracy of oxygen and carbon monoxide concentrations is 0.01%, and the measurement accuracy of carbon dioxide concentration is 0.1%.

5. The material ignition effect online testing system according to claim 1 is characterized in that: The weighing sensor (33) has a measuring range of 0kg to 5kg and a measuring accuracy of 0.01g.

6. The material ignition effect online testing system according to claim 1 is characterized in that: The sensor waveband of the high-speed camera (34) is the visible light waveband, and the frame rate is 200fps.

7. The material ignition effect online testing system according to claim 1 is characterized in that: The data collector (35) has three acquisition card slots, 120 single-ended measurement channels, and data parameter interfaces for data acquisition are Ethernet interfaces and USB interfaces.

8. The material ignition effect online testing system according to claim 1 is characterized in that: The main frame of the hatch (41) is made of stainless steel and sprayed with black anti-rust paint, and the size of the hatch is 600mm×600mm; The window piece (42) is made of fused quartz glass, with a 1 μm antireflection film coated on one side of the outer side, and a transmittance of 99% for 1 μm laser. The window piece (42) is provided with a φ60 mm opening, and the opening is used to install a germanium window piece made of germanium. The germanium window piece is used for observing the surface temperature of the material to be tested by the infrared thermal imager (31); The combustion table (43) is a steel metal plane for placing the wrapped material to be tested, which can be placed on the combustion table (43) vertically, horizontally or at any inclination angle; The test piece box (45) is a steel metal box with one side open, the size of the metal box is 10cm×10cm×5cm, and is used to place the material to be tested.

9. A material ignition effect online testing method, using any material ignition effect online testing system according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Online test system self-test: The material ignition effect online test system self-checks to confirm that it is in normal working condition; Step 2: Preparation of materials to be tested: The material to be tested is wrapped in aluminum foil and placed in a specimen box, and then the weight is measured; Step 3: Place the material to be tested in the combustion chamber: Open the combustion chamber door (41), place the test piece box containing the material to be tested on the combustion table (43) according to the test requirements; close the door (41); Step 4: Test system settings: Adjusting the fields of view of the infrared thermal imager (31) and the high-speed camera (34) until the entire heated surface of the material to be tested is observed; setting the temperature measurement range and acquisition frame rate of the infrared thermal imager (31), and setting the exposure time and acquisition frame rate of the high-speed camera (34); Turning on the gas analyzer (32), performing self-test, zero point calibration, and standard point calibration of the gas analyzer (32), and turning on the data acquisition device (35); Step 5: Heat flow loading system settings: When the irradiation intensity is 10W / cm 2 When the above conditions are met, a high heat flux loading device is used for loading; the high heat flux loading device is turned on, the irradiation intensity required to be loaded by the high power laser (12) is set, and the spot size of the imaging system (13) on the surface of the material to be tested is adjusted; When the irradiation intensity is 10W / cm 2 When the temperature is below 0.1°C, use a low heat flux loading device to load; turn on the low heat flux loading device and input the irradiation intensity of the material to be tested; Step 6: Material ignition effect data collection and analysis: Turning on the data acquisition device (35), loading the heat flux loading device, irradiating the material to be tested, and collecting the material ignition effect data; After the material ignition effect data collection is completed, the heat flow loading device and the data collector (35) are turned off; The data collected by the data collector (35) and the test data are analyzed to obtain material ignition effect parameters.

10. The material ignition effect online testing method according to claim 9 is characterized in that: The step 2 further comprises: First, the material to be tested is wrapped with aluminum foil, exposing the heating surface, and the heating surface is in close contact with the surface of the test piece box (45); secondly, the wrapped material to be tested is taken out, and a weighing sensor (33) is used to measure and record the weight of the test piece box (45) and the aluminum foil wrapping the test piece; Again, the material to be tested is wrapped with aluminum foil again to expose the heating surface. The wrapped material to be tested is placed in a test piece box (45) and then placed on a combustion table (43). The weighing sensor (33) is used to measure and record the weight. The weight of the material to be tested; In step 5, when the irradiation intensity is 10W / cm 2 When the temperature is below 2000℃, a high heat flux loading system can also be used. Alternative loading with low heat flux loading device.

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