A device and method for detecting the infrared transmittance of smoke screen in vacuum

Abstract

This invention relates to the field of infrared interference smoke screen technology, and particularly to a composite detection device and method for the infrared transmittance of interference smoke screens in a vacuum. The device includes: a vacuum tank, a vacuum pump, an electronic vacuum gauge, a temperature sensor, a humidity sensor, a target temperature simulation module, a simulation module controller, an interference smoke screen sample module, an ignition head, an igniter, a Fourier transform spectrometer, an infrared radiometer, an infrared thermal imager, a three-way solenoid valve, pipes, a filter, a flow meter, a computer module, a programmable logic controller (PLC), and a power supply. The Fourier transform spectrometer, infrared radiometer, and infrared thermal imager are used as composite transmittance testing methods to achieve the effectiveness of interference smoke under composite testing technology. A testing device with the same target temperature simulation module and the same testing environment is constructed to ensure consistency in the parameter acquisition environment. By combining actual transmittance detection data and measurement data from the multi-layer filter membrane kit, the material, particle size, and shape adjustment direction of the interference smoke screen are determined. The computer module and PLC control the device's operating procedure, improving the device's automation.

Description

Technical Field

[0001] This invention relates to the field of infrared interference smoke screen technology, and in particular to a composite detection device and method for infrared transmittance of interference smoke screen in a vacuum. Background Technology

[0002] Infrared jamming smoke screens are an important stealth jamming tool in the main atmospheric battlefield. Similarly, infrared jamming smoke screens can also be used for infrared stealth jamming of targets in outer space. This involves deploying infrared jamming materials along the path of the target and incoming missiles or observation / detection beams to form an infrared jamming smoke screen. The infrared jamming achieves its purpose by using the extinction effect of infrared radiation on the target. Outer space is a vacuum microgravity environment without air. The "jamming cloud" formed by the infrared jamming materials in infrared jamming smoke screens is no longer the "aerosol" with air as the dispersion medium and jamming materials as the dispersed phase, as described in the atmosphere. Instead, it is a "multi-particle suspension system." Transmittance is the core parameter for measuring the effectiveness of infrared jamming smoke screens. The important parameters determining the transmittance of a smoke screen are its concentration and its extinction characteristics. Extinction characteristics are the result of photon absorption, reflection loss, and scattering loss by particles of different sizes in the aerosol. To achieve the desired effect, the concentration and extinction characteristics must meet certain requirements.

[0003] Currently, there are three main smoke screen testing technologies: Fourier transform spectrometer testing technology, infrared radiometer testing technology, and infrared thermal imager testing technology. The purpose of releasing interference smoke screens is to achieve infrared stealth interference. It should meet the requirements of achieving infrared stealth under Fourier transform spectrometer testing technology, infrared radiometer testing technology, and infrared thermal imager testing technology. That is, the synthesis of concentration and extinction characteristics should meet the requirements of achieving infrared stealth under the above three technologies.

[0004] The working principle and characteristics of Fourier transform infrared (FTIR) spectrometer testing technology: FTIR spectrometers have no dispersive elements and no slits, so the light from the light source has sufficient energy to interfere with the sample before reaching the detector. The main core component of the measurement section of a Fourier transform infrared spectrometer is the interferometer, which consists of a fixed mirror, a movable mirror, and a beam splitter. The fixed and movable mirrors are mutually perpendicular plane mirrors. The beam splitter is positioned at a 45° angle between the fixed and movable mirrors. The beam splitter splits the light beam from the light source into two equal parts; one half of the beam is reflected after passing through the beam splitter, while the other half is transmitted through it. In a Michelson interferometer, when incident light from a light source is split into two beams by a beam splitter, the beams are reflected by two mirrors and then converged again before being projected onto a detector, the movement of the moving mirror creates an optical path difference between the two beams. When the optical path difference is an even multiple of half the wavelength, constructive interference occurs, producing bright lines; when it is an odd multiple of half the wavelength, destructive interference occurs, producing dark lines. If the optical path difference is neither an even multiple nor an odd multiple of half the wavelength, the coherent light intensity lies between the two cases. As the moving mirror moves, the cosine variation of the signal recorded on the detector changes periodically from bright to dark for every quarter-wavelength movement.

[0005] The working principle and characteristics of infrared radiometer testing technology: Infrared radiometer testing essentially utilizes the characteristic of objects radiating infrared radiation to perform non-contact infrared temperature recording. Infrared radiation is an electromagnetic wave, possessing the same nature as radio waves and visible light, with wavelengths between 0.76 and 100 μm. Its position in the continuous electromagnetic spectrum lies between radio waves and visible light. Infrared radiation is one of the most widespread electromagnetic radiations found in nature. It is based on the fact that any object under normal conditions produces its own molecules and atoms in random motion, continuously radiating thermal infrared energy. The more vigorous the molecular and atomic motion, the greater the radiated energy, and vice versa.

[0006] The working principle and characteristics of infrared thermal imager testing technology: Infrared thermal imagers utilize infrared detectors, optical imaging lenses, optomechanical scanning systems, or focal plane array structures to receive the infrared radiation energy distribution pattern of the target object and reflect it onto the photosensitive source of the infrared detector. The infrared thermal image of the target object is then scanned and focused onto a unit or spectrophotometer. The detector converts the infrared radiation energy into an electrical signal, which is amplified, converted, or displayed as a standard video signal on a television screen or monitor. Infrared thermal imagers can detect the temperature of heat points in real time, quantitatively, and online within a certain distance. Through scanning, they can also draw thermal images of the temperature gradient of equipment during operation. Furthermore, they have high sensitivity, are unaffected by electromagnetic interference, and are convenient for field use.

[0007] To ensure that the interfering smoke meets the requirements for infrared stealth interference in a vacuum, the concentration and extinction characteristics of the interfering smoke screen need to be adjusted based on the infrared transmittance test results from various testing techniques. This ensures that the results of each sub-test meet the requirements, meaning that the parameters for infrared stealth interference in a vacuum can be effectively met under the aforementioned composite testing techniques. Given the different testing techniques and principles involved in composite testing, it is necessary to construct the same testing environment on the same platform at the same time, and use the test results as the basis for synthesizing the extinction characteristic data of the infrared interference material.

[0008] Factors affecting the extinction properties of infrared interference smoke screens in a vacuum environment include the size, shape, and constituent materials of the particles. The extinction performance of interference smoke screens is closely related to the physical and chemical characteristics of the smoke particles. Due to variations in external oxygen concentration under vacuum conditions, the oxygen balance required for normal combustion of the interference smoke screen changes. Different environmental pressures also alter the combustion performance of the interference smoke screen, leading to significant changes in smoke formation properties and particle characteristics, thus severely impacting its extinction performance. Different types of interference materials possess different physical characteristics, and changes in the ambient vacuum level amplify the impact on the dynamic properties of the smoke particles, further affecting the extinction performance. Therefore, addressing the extinction performance requirements of infrared interference materials in vacuum for composite detection technologies, it is crucial to determine the optimal formulation and material type for infrared interference smoke screens under different vacuum conditions.

[0009] Shen Tao et al. proposed an infrared transmittance measurement device and method for infrared interference smoke screens in a vacuum. This system mainly solves the problem of infrared transmittance testing for infrared interference smoke screens with specific particle size ranges. However, the above system is still a passive measurement of the final result of the infrared transmittance of the interference smoke screen. It does not consider the relationship between the infrared transmittance of the interference smoke screen and the interference time and different test targets, the dynamic data change acquisition, and the effectiveness of composite testing methods. It is necessary to measure the composite dynamic data under the same test conditions for different test targets, and actively adjust the relevant parameters of the material, particle size, and shape of the interference smoke screen based on the measurement results before testing to form a complete testing and feedback mechanism. Summary of the Invention

[0010] The technical problem to be solved by the present invention is: a composite detection device and method for infrared transmittance of interference smoke screen in vacuum, which can meet the composite test results of infrared transmittance of different test objects under different vacuum environments, and provide adjustment schemes for adjusting the material, shape and particle size of interference smoke screen based on the results.

[0011] To achieve the above objectives, the present invention provides the following solution:

[0012] A composite detection device for infrared transmittance of interfering smoke in a vacuum includes: a vacuum tank, a vacuum pump, an electronic vacuum gauge, a temperature sensor, a humidity sensor, a target temperature simulation module, a simulation module controller, an interfering smoke sample module and an ignition head, an igniter, a Fourier spectrometer, an infrared radiometer, an infrared thermal imager, a three-way solenoid valve, pipes, a filter, a flow meter, a computer module, a programmable logic controller, and a power supply.

[0013] The interference smoke screen sample module, ignition head, and igniter are installed into the vacuum tank through a mounting port on the vacuum tank.

[0014] The electronic vacuum gauge, temperature sensor, and humidity sensor measure the vacuum level, temperature, and humidity inside the vacuum tank through measuring ports set on the vacuum tank body, respectively.

[0015] The Fourier spectrometer, infrared radiometer, and infrared thermal imager respectively detect the infrared characteristics of the target temperature simulation module inside the vacuum tank through measurement ports set on the vacuum tank body;

[0016] The analog module controller, vacuum pump, electronic vacuum gauge, three-way solenoid valve, flow meter, temperature sensor, humidity sensor, igniter, Fourier spectrometer, infrared radiometer, and infrared thermal imager are connected to the programmable logic controller, which is then connected to the computer module and operates under the control of the computer module.

[0017] The vacuum pump is connected to the first path of the three-way solenoid valve through a filter. The second path of the three-way solenoid valve is connected to the vacuum tank through a glass fiber filter membrane, a multi-layer filter membrane kit, a flow meter, and a mounting port. The third path of the three-way solenoid valve is connected to the vacuum tank through a pipe and a mounting port.

[0018] Furthermore, the vacuum pump is an air-cooled direct-vent atmospheric Roots pump or an oil-sealed rotary vane vacuum pump.

[0019] Furthermore, at least one openable observation window is provided in the middle of the vacuum tank, including a window body and a window cover. The window body is at the same height as the target temperature simulation module, and the window cover is made of the same material as the interior of the vacuum tank.

[0020] Furthermore, the igniter is a laser ignition device.

[0021] Furthermore, the volume of the vacuum tank is 1m³. 3 .

[0022] Furthermore, the filter includes a liquid water filter and a condenser.

[0023] This invention also discloses a method for simulating the composite detection of infrared transmittance of interfering smoke in a vacuum, applied to the aforementioned composite detection device for infrared transmittance of interfering smoke in a vacuum, comprising the following steps:

[0024] 101: Set test environment parameters and thresholds via computer;

[0025] 102: Power on. Control the vacuum pump to power on via the programmable logic controller. After the vacuum parameter RH meets the vacuum and humidity conditions, control the vacuum pump to power off. δ≥δ1 and RH≤RH1. Record the temperature parameter t1, humidity parameter δ1, and vacuum parameter RH1.

[0026] 103: The temperature is increased to t using the target temperature simulation module. When t ≥ t2, heating is stopped. The measured data of radiance from the Fourier spectrometer, infrared radiometer, and infrared thermal imager at t2 are recorded as follows: L t1 =L b1 +L o1 L t2 =L b2 +L o2 L t3 =L b3 +L o3 , where L o1 L o2 L o3 L represents the radiance data of the target temperature simulation module t2 when smoke is absent. b1 L b2 L b3 The background radiance data is for the absence of smoke.

[0027] Step 104: Ignite the ignition head of the interference smoke screen sample module under test using an igniter to generate smoke. The data for radiance measured by the Fourier transform spectrometer, infrared radiometer, and infrared thermal imager under the t2 smoke condition is L′. t1 L' t2 L' t3 , where: L' t1 =L' b1 +L' o1 +L' s1 ;L' t2 =L' b2 +L' o2 +L' s2 ;L' t3 =L' b3 +L' o3 +L' s3 , where L' o1 L' o2 L' o3To measure the radiance of the simulation module of Fourier spectrometer, infrared radiometer, and infrared thermal imager under smoke interference, L' b1 L' b2 L' b3 L' represents the background radiance measured by a Fourier spectrometer, infrared radiometer, and infrared thermal imager under smog interference. s1 L' s2 L' s3 The radiance of the smoke itself as measured by a Fourier spectrometer, an infrared radiometer, and an infrared thermal imager;

[0028] 105: If L1≤L' t1 L2≤L' t2 L3≤L' t3 And if T≤ΔT, record the transmittance parameters detected by the Fourier spectrometer, infrared radiometer, and infrared thermal imager, and the time T for which the three threshold conditions are simultaneously met, then proceed to step 106; if T>ΔT, and L1≤L' t1 L2≤L' t2 L3≤L' t3 If any one of the three conditions is not met, proceed to step 107;

[0029] 106: Weigh the multilayer filter membrane kit and the deposits, and record the data to the computer module;

[0030] 107: Adjust the composition and content of the energy supply agent, the composition and content of the aerosol generator or infrared active material, and the composition and content of the additives, then proceed to step 104.

[0031] Furthermore, the preset data in step 101 includes temperature condition t1, humidity condition RH1, target temperature simulation module simulated temperature t2, vacuum condition δ1, Fourier spectrometer interference target threshold L1, infrared radiometer interference target threshold L2, infrared thermal imager interference target threshold L3, interference time threshold ΔT, and sampling frequency f of Fourier spectrometer, infrared radiometer, and infrared thermal imager.

[0032] Furthermore, step 101 also includes: determining the upper limit of the glass fiber filter membrane pore size and the lower limit of the multilayer filter membrane kit size by the diameter of the aerosol or infrared active material generated by the high-temperature pyrolysis of the interference smoke screen sample module to be tested.

[0033] Further: Step 105 calculates the actual infrared transmittance ΔL1, ΔL2, ΔL3, as follows:

[0034]

[0035]

[0036]

[0037] Among them, L o1 L o2 L o3 L represents the radiance of the target temperature simulation module when smoke is absent. b1 L b2 L b3 The background radiance is t2 when there is no smoke; the radiance measurement data under smoke conditions is L′. t1 L' t2 L' t3 , where: L' t1 =L' b1 +L' o1 +L' s1 ;L' t2 =L' b2 +L' o2 +L' s2 ;L′ t3 =L′ b3 +L′ o3 +L′ s3 .

[0038] Beneficial effects: The technical solution of this application has the following technical effects: This invention discloses a composite detection device and method for infrared transmittance of interfering smoke in a vacuum. It uses a Fourier transform spectrometer, an infrared radiometer, and an infrared thermal imager as composite testing methods for transmittance, realizing the effectiveness of interfering smoke under composite testing technology. A testing device with the same target temperature simulation module and the same testing environment is constructed to achieve consistency in the parameter acquisition environment. By combining actual transmittance detection data and measurement data from multilayer filter membrane kits, the material, particle size, and shape adjustment direction of the interfering smoke are determined. The working program of the equipment is controlled by a computer module and a programmable logic controller, improving the automation of the equipment. Attached Figure Description

[0039] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0040] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0041] Figure 2 This is a schematic diagram of the partial structural disassembly state of the present invention;

[0042] Figure 3 This is a flowchart of a method for simulating the composite detection of infrared transmittance of interference smoke screen in a vacuum according to the present invention.

[0043] The meanings of the various reference numerals in the figure are as follows: 1. Vacuum tank; 2. Vacuum pump; 3. Electronic vacuum gauge; 4. Temperature sensor; 5. Humidity sensor; 6. Target temperature simulation module; 7. Simulation module controller; 8. Interference smoke screen sample module and ignition head; 9. Ignition device; 10. Fourier spectrometer; 11. Infrared radiometer; 12. Infrared thermal imager; 13. Three-way solenoid valve; 14. Pipeline; 15. Filter; 16. Flow meter; 17. Computer module; 18. Programmable logic controller; 19. Power supply; 20. Glass fiber filter membrane; 21. Multilayer filter membrane kit. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. To better understand the technical content of the present invention, specific embodiments are provided and described in conjunction with the accompanying drawings. Various aspects of the present invention are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. Detailed Implementation Method 1

[0046] As attached Figure 1 To be continued Figure 2 As shown: This embodiment provides a composite detection device and method for infrared transmittance of interference smoke in a vacuum, including: a vacuum tank 1, a vacuum pump 2, an electronic vacuum gauge 3, a temperature sensor 4, a humidity sensor 5, a target temperature simulation module 6, a simulation module controller 7, an interference smoke sample module and an ignition head 8, an igniter 9, a Fourier spectrometer 10, an infrared radiometer 11, an infrared thermal imager 12, a three-way solenoid valve 13, a pipe 14, a filter 15, a flow meter 16, a computer module 17, a programmable logic controller 18, a power supply 19, a glass fiber filter membrane 20, and a multilayer filter membrane kit 21;

[0047] The interference smoke screen sample module, ignition head 8, and igniter 9 are installed inside the vacuum tank 1 through the mounting port on the vacuum tank 1.

[0048] The electronic vacuum gauge 3, temperature sensor 4, and humidity sensor 5 measure the vacuum level, temperature, and humidity inside the vacuum tank 1 through the measuring ports set on the vacuum tank 1, respectively.

[0049] The Fourier spectrometer 10, infrared radiometer 11, and infrared thermal imager 12 respectively detect the infrared characteristics of the target temperature simulation module 6 inside the vacuum tank 1 through the measurement port set on the vacuum tank 1.

[0050] The analog module controller 7, vacuum pump 2, electronic vacuum gauge 3, three-way solenoid valve 13, flow meter 16, temperature sensor 4, humidity sensor 5, igniter 9, Fourier spectrometer 10, infrared radiation meter 11, and infrared thermal imager 12 are connected to programmable logic controller 18, and then to computer module 17, and work under the control of computer module 17.

[0051] The vacuum pump 2 is connected to the first path of the three-way solenoid valve 13 through the filter 15. The second path of the three-way solenoid valve 13 is connected to the vacuum tank 1 through the glass fiber filter membrane 20, the multi-layer filter membrane kit 21, the flow meter 16 and the installation port. The third path of the three-way solenoid valve 13 is connected to the vacuum tank 1 through the pipe 14 and the installation port.

[0052] The working principle and usage process of this invention: The user installs the test interference smoke screen sample module and the ignition head 8 into place. The upper limit of the pore size of the glass fiber filter membrane 20 and the lower limit of the size of the multilayer filter membrane kit 21 are determined according to the diameter of the aerosol or infrared active material generated by the high-temperature pyrolysis of the test interference smoke screen sample module, and then installed in place. The simulation module controller 7, vacuum pump 2, electronic vacuum gauge 3, three-way solenoid valve 13, flow meter 16, temperature sensor 4, humidity sensor 5, igniter 9, Fourier spectrometer 10, infrared radiometer 11, infrared thermal imager 12, programmable logic controller 18, and computer module 17 are then connected in place.

[0053] The test environment is set in computer module 17, including temperature conditions, humidity conditions, target temperature simulation module 6 (simulated temperature), vacuum conditions, any two or all of the interference target thresholds of Fourier spectrometer 10, infrared radiometer 11, and infrared thermal imager 12, interference time threshold, and any two or all of the sampling frequencies of Fourier spectrometer 10, infrared radiometer 11, and infrared thermal imager 12. The composition and content of the energy supply agent, aerosol generator or infrared active material, and additives of the interference smoke screen sample module under test are recorded. Power is supplied to all devices. Computer module 17 controls the opening of the first and third passage valves of three-way solenoid valve 13 via programmable logic controller 18, connecting the first and third passages and controlling the start of vacuum pump 2. When computer module 17 collects information from electronic vacuum gauge 3 and humidity sensor 5 that meets the vacuum and humidity conditions, it controls the vacuum pump 2 to shut down via programmable logic controller 18, simultaneously closing the first and third passage valves of three-way solenoid valve 13, and recording the temperature, humidity, and vacuum parameters. The computer module 17 controls the Fourier spectrometer 10, infrared radiometer 11, and infrared thermal imager 12, which are corresponding to the set interference target threshold, to turn on via the programmable logic controller 18. The computer module 17 detects the background radiation brightness and records the detection data of each instrument under the initial environmental detection conditions. After recording, the computer module 17 turns off the test instrument.

[0054] Computer module 17 controls simulation module controller 7 via programmable logic controller 18 to heat target temperature simulation module 6, stopping heating once the set value of the simulated temperature of target temperature simulation module 6 is reached. Computer module 17 also controls the Fourier spectrometer 10, infrared radiometer 11, and infrared thermal imager 12, corresponding to the set interference target threshold, to power on via programmable logic controller 18, and to detect target temperature simulation module 6, recording the detection data of each instrument after the simulated temperature of target temperature simulation module 6 is reached. After recording, the testing instrument is turned off.

[0055] Computer module 17 controls igniter 9 to ignite the test interference smoke screen sample module and igniter head 8 via programmable logic controller 18. Computer module 17 also controls Fourier spectrometer 10, infrared radiometer 11, and infrared thermal imager 12 to record the radiation brightness after the smoke screen appears according to the sampling frequency, based on the detection information corresponding to the set interference target threshold. The computer module 17 records the transmittance parameter detected by the detection equipment and the time when the set threshold condition is met but the interference time threshold condition is not met. If the interference time threshold condition is met and at least one of the set threshold conditions for the transmittance parameter detected by the detection equipment is not met, the composition and content of the energy supply agent, the composition and content of the aerosol generator or infrared active material, and the composition and content of the additives are adjusted. Detailed Implementation Method 2

[0057] like Figure 3 As shown: This invention also discloses a method for simulating the composite detection of infrared transmittance of interfering smoke in a vacuum, applied to the aforementioned composite detection device for infrared transmittance of interfering smoke in a vacuum, comprising the following steps:

[0058] Step 101: Set the test environment parameters and thresholds using computer 17;

[0059] Step 102: Start the machine by turning on the vacuum pump 2. The humidity parameter δ and the vacuum parameter RH meet the preset vacuum and humidity conditions, and then turn off the vacuum pump.

[0060] Step 103: Increase the temperature using the target temperature simulation module 6. When t ≥ t2, stop increasing the temperature and record the data of the Fourier spectrometer 10, infrared radiometer 11, and infrared thermal imager 12 at t2 as follows: L t1 =L b1 +L o1 L t2 =L b2 +L o2 L t3 =L b3 +L o3 , where L o1 L o2 L o3 L represents the radiance data of the target temperature simulation module t2 when smoke is absent. b1 L b2 L b3 The background radiance data is for the absence of smoke.

[0061] Step 104: Ignite the ignition head 8 of the interference smoke screen sample module to be tested using igniter 9 to generate smoke. The data of radiance measured by Fourier spectrometer 10, infrared radiometer 11, and infrared thermal imager 12 under the smoke condition t2 is L′. t1 L' t2 L' t3 , where: L' t1 =L' b1 +L' o1 +L' s1 ;L' t2 =L' b2 +L' o2 +L' s2 ;L' t3 =L' b3 +L' o3 +L' s3 , where L' o1 L' o2 L' o3To measure the radiance of the Fourier spectrometer 10, infrared radiometer 11, and infrared thermal imager simulation module 12 under smoke interference, L' b1 L' b2 L' b3 L' represents the background radiance measured by the Fourier spectrometer 10, infrared radiometer 11, and infrared thermal imager 13 under smoke interference. s1 L' s2 L' s3 The radiance of the smoke itself as measured by the Fourier spectrometer 10, infrared radiometer 11, and infrared thermal imager 12;

[0062] Step 105, L1≤L' t1 L2≤L' t2 L3≤L' t3 And T≤ΔT, and T≤ΔT, record the transmittance parameters detected by the Fourier spectrometer 10, infrared radiometer 11, and infrared thermal imager 12, and the time T for simultaneously satisfying the three threshold conditions, and proceed to step 106; if T>ΔT, and L1≤L' t1 L2≤L' t2 L3≤L' t3 If any one of the three conditions is not met, proceed to step 107;

[0063] Step 106: Weigh the multilayer filter membrane kit 21 and the attached material, and record all data under this condition;

[0064] Step 107: Adjust the composition and content of the energy supply agent, the composition and content of the aerosol generator or infrared active material, and the composition and content of the additives.

[0065] In specific step 102, the interference smoke screen sample module to be tested and the ignition head 8 are installed in place;

[0066] The upper limit of the pore size of the glass fiber filter membrane 20 and the lower limit of the size of the multilayer filter membrane kit 21 are determined according to the diameter of the aerosol or infrared active substance generated by the high-temperature pyrolysis of the interference smoke screen sample module to be tested, and then installed in place.

[0067] In specific step 102, the test environment is set in computer module 17, including temperature condition t1, humidity condition RH1, target temperature simulation module 6 simulated temperature t2, vacuum condition δ1, Fourier spectrometer 10 interference target threshold L1, infrared radiometer 11 interference target threshold L2, infrared thermal imager 12 interference target threshold L3, interference time threshold ΔT, Fourier spectrometer 10, infrared radiometer 11, infrared thermal imager 12 sampling frequency f, and the composition and content of energy supply agent, aerosol generator or infrared active material, and additives of the interference smoke screen sample module to be tested are recorded.

[0068] Power is supplied to all devices. The computer module 17 controls the first and third passage valves of the three-way solenoid valve 13 to open via the programmable logic controller 18. After connecting the first and third passages, the vacuum pump 2 is started. When the computer module 17 collects the humidity parameter δ of the electronic vacuum gauge 3 and the vacuum parameter RH of the humidity sensor 5, and they meet the vacuum and humidity conditions in formula (1), the vacuum pump 2 is turned off.

[0069] δ≥δ1 and RH≤RH1(1)

[0070] Close the first and third passage valves of the three-way solenoid valve 13, and record the temperature parameter t0, humidity parameter δ, and vacuum parameter RH;

[0071] Computer module 17 controls the Fourier spectrometer 10, infrared radiometer 11, and infrared thermal imager 12 to power on via programmable logic controller 18, and detects background radiance, recording the detection data of each instrument under initial environmental conditions.

[0072] L t1 =L b1 L t2 =L b2 L t3 =L b3 (2)

[0073] In equation (2) L t1 For the radiance received by the Fourier spectrometer 10, L b1 L represents the background radiance when smoke is absent. t2 For the radiance received by infrared radiometer 11, L b2 L represents the background radiance when smoke is absent. t3 For the radiance received by the infrared thermal imager 12, L b3 The background radiance is recorded when there is no smoke. After recording, the instrument is turned off.

[0074] In step 103, the computer module 17 controls the simulation module controller 7 to heat the target temperature simulation module 6 through the programmable logic controller 18. When the temperature reaches the set value t≥t2 of the simulated temperature of the target temperature simulation module 6, the heating stops.

[0075] Computer module 17 controls the Fourier spectrometer 10, infrared radiometer 11, and infrared thermal imager 12 to power on via programmable logic controller 18, and performs detection on target temperature simulation module 6, recording the detection data of each instrument when the simulated temperature of target temperature simulation module 6 reaches t2.

[0076] L t1 =L b1 +L o1L t2 =L b2 +L o2 L t3 =L b3 +L o3 (3)

[0077] In equation (3) L o1 L o2 L o3 The radiance of the target temperature simulation module 6 when there is no smoke is recorded. After recording, the tester is turned off.

[0078] In step 104, computer module 17 controls igniter 9 to ignite the ignition head of the test interference smoke screen sample module via programmable logic controller 18. Computer module 17 also controls the detection information from Fourier spectrometer 10, infrared radiometer 11, and infrared thermal imager 12 via programmable logic controller 18 to record the radiance after the presence of smoke according to the sampling frequency f.

[0079]

[0080] In equation (4), step 105 makes a judgment: if L1≤L' t1 L2≤L' t2 L3≤L' t3 And T≤ΔT, record the transmittance parameters detected by the three detection devices and the time T during which the three threshold conditions are met simultaneously, and proceed to the next step 106. If T>ΔT and L1≤L' t1 L2≤L' t2 L3≤L' t3 If at least one of the three conditions is not met, proceed to step 107. Adjust the composition and content of the energy supply agent, the aerosol generator or infrared active material, and the additives. Then, control the igniter 9 via the programmable logic controller 18 to ignite the ignition head of the interference smoke screen sample module to be tested. The computer module 17 controls the detection information from the Fourier spectrometer 10, infrared radiometer 11, and infrared thermal imager 12 via the programmable logic controller 18 to record the radiance after the smoke screen is present according to the sampling frequency f. Calculate the actual infrared transmittance ΔL1, ΔL2, and ΔL3 as follows:

[0081]

[0082] In equation (5), L o1 L o2 L o3 L represents the radiance of the target temperature simulation module when smoke is absent. b1 L b2 L b3The background radiance is t2 when there is no smoke; the radiance measurement data under smoke conditions is L′. t1 L' t2 L' t3 , where: L' t1 =L' b1 +L' o1 +L' s1 ;L' t2 =L' b2 +L' o2 +L' s2 ;L′ t3 =L′ b3 +L′ o3 +L′ s3 .

[0083] The computer module 17 controls the first and second passage valves of the three-way solenoid valve 13 to open through the programmable logic controller 18, and after connecting the first and second passages, controls the vacuum pump 2 to start.

[0084] If L1≤L' t1 L2≤L' t2 L3≤L' t3 And T≤ΔT, record the transmittance parameters detected by the three detection devices and the time T for simultaneously satisfying the three threshold conditions, then weigh the multilayer filter membrane kit 21 and the attached substances, and record the data to the computer module 17, compare it with the numerical values ​​calculated by simulation, determine and record the composition and content of energy supply agent, composition and content of aerosol generator or infrared active material, and composition and content of additives.

[0085] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0086] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A composite detection device for infrared transmittance of interfering smoke screen in a vacuum, comprising: Vacuum tank, vacuum pump, electronic vacuum gauge, temperature sensor, humidity sensor, target temperature simulation module, simulation module controller, interference smoke screen sample module and ignition head, igniter, Fourier spectrometer, infrared radiometer, infrared thermal imager, three-way solenoid valve, pipes, filter, flow meter, computer module, programmable logic controller and power supply. The interference smoke screen sample module, ignition head and igniter are installed into the vacuum tank through the mounting port on the vacuum tank; The electronic vacuum gauge, temperature sensor, and humidity sensor measure the vacuum level, temperature, and humidity inside the vacuum tank through measuring ports set on the vacuum tank body, respectively. The Fourier spectrometer, infrared radiometer, and infrared thermal imager respectively detect the infrared characteristics of the target temperature simulation module inside the vacuum tank through measurement ports set on the vacuum tank body; The analog module controller, vacuum pump, electronic vacuum gauge, three-way solenoid valve, flow meter, temperature sensor, humidity sensor, igniter, Fourier spectrometer, infrared radiometer, and infrared thermal imager are connected to the programmable logic controller, which is then connected to the computer module and operates under the control of the computer module. The vacuum pump is connected to the first path of the three-way solenoid valve through a filter. The second path of the three-way solenoid valve is connected to the vacuum tank through a glass fiber filter membrane, a multi-layer filter membrane kit, a flow meter, and a mounting port. The third path of the three-way solenoid valve is connected to the vacuum tank through a pipe and a mounting port.

2. The composite detection device for infrared transmittance of interference smoke screen in vacuum according to claim 1, characterized in that: The vacuum pump is either an air-cooled direct-vent atmospheric Roots pump or an oil-sealed rotary vane vacuum pump.

3. The composite detection device for infrared transmittance of interference smoke screen in vacuum according to claim 1, characterized in that: At least one openable observation window is provided in the middle of the vacuum tank, including a window body and a window cover. The window body is at the same height as the target temperature simulation module, and the window cover is made of the same material as the interior of the vacuum tank.

4. The composite detection device for infrared transmittance of interference smoke screen in vacuum according to claim 1, characterized in that: The igniter is a laser ignition device.

5. The composite detection device for infrared transmittance of interference smoke screen in vacuum according to claim 1, characterized in that: The volume of the vacuum tank is 1m³. 3 .

6. The composite detection device for infrared transmittance of interference smoke screen in vacuum according to claim 1, characterized in that: The filter includes a liquid water filter and a condenser.

7. A method for simulating the composite detection of infrared transmittance of interfering smoke screen in a vacuum, applied to the composite detection device for infrared transmittance of interfering smoke screen in a vacuum as described in claim 1, comprising the following steps: 101: Set test environment parameters and thresholds via computer; 102: Power on. The vacuum pump is powered on by the programmable logic controller. After the vacuum parameter RH meets the vacuum and humidity conditions, the vacuum pump is powered off. The temperature parameter t1, humidity parameter δ1, and vacuum parameter RH1 are recorded if δ≥δ1 and RH≤RH1. 103: The temperature is increased to t using the target temperature simulation module. When t ≥ t2, heating is stopped. The measured data of radiance from the Fourier spectrometer, infrared radiometer, and infrared thermal imager at t2 are recorded as follows: L t1 =L b1 +L o1 L t2 =L b2 +L o2 L t3 =L b3 +L o3 , where L o1 L o2 L o3 L represents the radiance data of the target temperature simulation module t2 when smoke is absent. b1 L b2 L b3 The background radiance data is for the absence of smoke. Step 104: Ignite the ignition head of the interference smoke screen sample module under test using an igniter to generate smoke. The data for radiance measured by the Fourier transform spectrometer, infrared radiometer, and infrared thermal imager under the t2 smoke condition is L′. t1 L' t2 L' t3 , where: L' t1 =L' b1 +L' o1 +L' s1 ;L' t2 =L' b2 +L' o2 +L' s2 ;L' t3 =L' b3 +L' o3 +L' s3 , where L' o1 L' o2 L' o3 To measure the radiance of the simulation module of Fourier spectrometer, infrared radiometer, and infrared thermal imager under smoke interference, L' b1 L' b2 L' b3 L' represents the background radiance measured by a Fourier spectrometer, infrared radiometer, and infrared thermal imager under smog interference. s1 L' s2 L' s3 The radiance of the smoke itself as measured by a Fourier spectrometer, an infrared radiometer, and an infrared thermal imager; 105: If L1≤L' t1 L2≤L' t2 L3≤L' t3 And if T≤ΔT, record the transmittance parameters detected by the Fourier spectrometer, infrared radiometer, and infrared thermal imager, and the time T for which the three threshold conditions are simultaneously met, then proceed to step 106; if T>ΔT, and L1≤L' t1 L2≤L' t2 L3≤L' t3 If any one of the three conditions is not met, proceed to step 107; 106: Weigh the multilayer filter membrane kit and the deposits, and record the data to the computer module; 107: Adjust the composition and content of the energy supply agent, the composition and content of the aerosol generator or infrared active material, and the composition and content of the additives, then proceed to step 104.

8. The method for simulating the composite detection of infrared transmittance of interference smoke screen in vacuum according to claim 7, characterized in that: The preset data in step 101 includes temperature condition t1, humidity condition RH1, target temperature simulation module simulated temperature threshold t2, vacuum condition δ1, Fourier spectrometer interference target threshold L1, infrared radiometer interference target threshold L2, infrared thermal imager interference target threshold L3, interference time threshold ΔT, and sampling frequency f of Fourier spectrometer, infrared radiometer, and infrared thermal imager.

9. The method for simulating the composite detection of infrared transmittance of interference smoke screen in vacuum according to claim 7, characterized in that: Step 101 further includes: determining the upper limit of the glass fiber filter membrane pore size and the lower limit of the multilayer filter membrane kit size by the diameter of the aerosol or infrared active material generated by the high-temperature pyrolysis of the interference smoke screen sample module to be tested.

10. The method for simulating the composite detection of infrared transmittance of interference smoke screen in vacuum according to claim 7, characterized in that: It also includes step 105, which calculates the actual infrared transmittance ΔL1, ΔL2, and ΔL3, as follows: Among them, L o1 L o2 L o3 L represents the radiance of the target temperature simulation module when smoke is absent. b1 L b2 L b3 The background radiance is t2 when there is no smoke; the radiance measurement data under smoke conditions is L′. t1 L' t2 L' t3 , where: L' t1 =L' b1 +L' o1 +L' s1 ;L' t2 =L' b2 +L' o2 +L' s2 ;L′ t3 =L′ b3 +L′ o3 +L′ s3 .

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