Testing platform and method for infrared alarm and countermeasure equipment response time

Abstract

The present invention provides a test platform and method for the reaction time of infrared alarm and countermeasure equipment, belonging to the field of infrared alarm and countermeasure technology. The platform includes an electronic control system, a target simulation device connected thereto, and a product under test. The product under test is an infrared alarm and countermeasure device. Multiple sets of target simulation devices are circumferentially arranged in a sliding manner within the field of view of the product under test. The target simulation device can emit the medium-wave infrared light required by the infrared alarm sensor of the product under test, and can also capture the interference energy emitted by the product under test. The electronic control system synchronizes the time of the target simulation device and the product under test. The present invention solves the problem that traditional reaction time testing methods cannot automatically obtain each time stamp, and require manual playback of recorded images combined with timestamps to calculate and evaluate the reaction time, resulting in low reaction time acquisition accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of infrared alarm and countermeasure, and in particular relates to a test platform and method for the reaction time of infrared alarm and countermeasure equipment. Background Art

[0002] When a vehicle (such as a civil aircraft) is located in certain areas, it may be threatened by infrared-guided intelligent agents launched by other personnel. Since the intelligent agents have a short launch distance and fly at a high speed, it is usually difficult for the vehicle pilot to visually detect the incoming intelligent agents and take protective measures, which poses a great threat to the vehicle's safety.

[0003] In related technologies, infrared warning and countermeasures equipment can be installed on vehicles to effectively warn when attacked by intelligent agents and to jam the attacking agent's seeker by emitting lasers, thereby deflecting it from its course. The response time of infrared warning and countermeasures equipment, including warning response time, jamming response time, multi-target jamming time, and system response time, is a core metric for infrared warning and countermeasures equipment and is directly related to its effectiveness and the vehicle's survivability. Therefore, accurately and efficiently measuring the response time of infrared warning and countermeasures equipment is crucial for evaluating its performance.

[0004] The traditional reaction time testing method involves setting up a high-speed camera to simultaneously record the infrared target source, the device under test, and the display screen reporting the signal from the device under test. The recorded images are then manually replayed and timestamped to calculate and evaluate the reaction time. This method has disadvantages such as complex test scenario setup, poor time accuracy, and low levels of scenario testing automation. Summary of the Invention

[0005] Technical issues to be solved:

[0006] To overcome the shortcomings of the prior art, the present invention provides a test platform and method for the reaction time of infrared alarm and countermeasure equipment. The test platform includes an electronic control system, a target simulation device, and a product under test. The target simulation device integrates a target source, a light-shielding shutter, a detection and response unit, a GPS time synchronization unit, and an infrared point source, and is positioned within the field of view of the product under test. The electronic control system controls and collects data from the target simulation device and the product under test, and processes the collected data to obtain the reaction time of the infrared alarm and countermeasure equipment. The present invention solves the problem that traditional reaction time testing methods cannot automatically obtain each time stamp, requiring manual playback of recorded images combined with time stamps to calculate and evaluate the reaction time, resulting in low reaction time acquisition accuracy.

[0007] The technical solution of the present invention is: a test platform for the reaction time of infrared warning and countermeasure equipment, including an electronic control system, a target simulation device connected thereto, and a product under test, wherein the product under test is an infrared warning and countermeasure equipment, and multiple sets of target simulation devices are circumferentially arranged in a sliding manner within the field of view of the product under test;

[0008] The target simulation device can emit the medium-wave infrared light required by the infrared alarm sensor to the product under test, and can also capture the interference energy emitted by the product under test;

[0009] The electronic control system synchronizes the timing of the target simulation device and the product under test, and can accurately obtain the moment when the target simulation device emits medium-wave infrared light, the moment when the product under test issues an infrared alarm, the moment when the product under test locks the position of the target simulation device and emits a laser beam, and the moment when the target simulation device detects interference energy, thereby calculating the infrared alarm and countermeasure device reaction time.

[0010] A further technical solution of the present invention is: the target simulation device includes a target source, a light-shielding shutter, a detection and response unit, and an infrared point source. The target source emits infrared radiation of a fixed band, and a light-shielding shutter is set at the starting point of the emission path. The light-shielding shutter is controlled to control the emission time of the target source infrared light; the detection and response unit collects the interference laser beam emitted by the countermeasure device through the front auxiliary optical path; the infrared point source is used to provide the infrared light required for the countermeasure device to lock the target.

[0011] A further technical solution of the present invention is that two sets of the target simulation equipment are installed on the annular guide rail through a supporting platform, and the azimuth difference θ can be continuously adjusted within 10° to 180°.

[0012] A further technical solution of the present invention is that the target source emits light in the mid-infrared band of 3.7μm to 4.8μm.

[0013] A further technical solution of the present invention is that the detection response unit is provided with a laser marker capable of emitting a cross cursor. Before testing, the cross cursor is aligned with the center of the optical axis of the optical system of the product being tested, thereby ensuring that the laser can enter the detection response unit.

[0014] A further technical solution of the present invention is: the electronic control system includes a GPS time synchronization subsystem and a data processing subsystem, and the GPS time synchronization subsystem is used to uniformly synchronize the time of the target source and the detection response unit of the product under test and the target simulation device; the data processing subsystem is respectively connected to the target source, the light-shielding shutter, the detection response unit, the PS time synchronization subsystem, and the product under test, and is used to control the action execution of each part and record the action execution time.

[0015] A further technical solution of the present invention is: the data processing subsystem includes an interference test unit and a control computer; the interference test unit is connected to the product under test and each execution component, controls the action execution of the target source, light-shielding shutter, infrared point source, detection and response unit and GPS time synchronization subsystem, receives feedback information from the GPS time synchronization subsystem, detection and response unit and the product under test, and accurately measures the response time of each link of the product under test; the background data processing system of the control computer can calculate the alarm reaction time, target interception and tracking time, system reaction time, interference reaction time and multi-target interference time interval.

[0016] A further technical solution of the present invention is: the method for calculating the reaction time of the infrared alarm and countermeasure equipment is: respectively obtaining the moment t0 when the first target simulation device emits medium-wave infrared light, the infrared alarm moment t1 of the tested product, the moment t2 when the tested product locks the position of the first target simulation device and emits a laser beam, and the moment t3 when the first target simulation device detects interference energy, and calculating the alarm reaction time by t1-t0; calculating the interference reaction time by t2-t1; and calculating the system reaction time by t2-t0.

[0017] A further technical solution of the present invention is: a method for calculating the time interval of the infrared warning and countermeasure equipment being interfered with by multiple targets is to obtain the moment t4 when the second target simulation device detects the interference energy, and calculate the multi-target interference time interval by t4-t3.

[0018] A method for testing the response time of infrared alarm and countermeasure equipment, the specific steps are as follows:

[0019] Place two sets of target simulation equipment at designated locations in front of the wide-field-of-view infrared warning and countermeasure equipment;

[0020] Turn on the cross laser pointer on the target simulation device, adjust the target source and infrared point source on the target simulation device as a whole, align the center of the cross with the optical axis of the countermeasure device, and lock the installation tooling of the target simulation device;

[0021] The target source of the first target simulation device is turned on, and the light-shielding shutter of the first target simulation device is controlled by the electronic control system to open, and the light-shielding shutter opening time t0 is recorded; the target source radiation energy is identified by the alarm device and an alarm signal is issued, and the reporting time t1; the countermeasure device adjusts the optical axis to the target alarm direction according to the alarm signal, and the infrared receiving unit of the countermeasure device accurately captures the point target, locks the countermeasure target and emits an interference laser, and reports the time t2; the detection and response unit on the first target simulation device detects the interference energy and feeds back a pulse signal, and the data processing system analyzes the rising edge of the pulse wave and gives the time t3;

[0022] The alarm response time is calculated by t1-t0; the interference response time is calculated by t2-t1;

[0023] When conducting a multi-target interference time interval test, two target simulation systems are turned on at the same time, and the above steps are performed in sequence. After time t2, the infrared warning and countermeasure equipment rotates by angle θ, tracks and locks the infrared point source of the second target simulation device, and then emits a second interference laser beam. After the laser beam is captured by the detection and response unit, the data processing subsystem records this time point t4; the multi-target interference time is calculated by t4-t3.

[0024] Beneficial effects

[0025] The beneficial effects of this invention include accurately testing the interference performance and various system times of the interference device under test. It can measure test items such as system response time, countermeasure tracking lock time, multi-target time interval, system response time, and interference response time. The test scenario is easy to set up, the test process is simple, and the test automation level is high, with excellent accuracy. It has been verified that the response time test accuracy of traditional methods is over 500ms, while the present invention can achieve a response time accuracy of less than 10ms.

[0026] The present invention utilizes a light-shielding shutter to precisely control the infrared radiation light source signal and the time when it enters the alarm device, and records it through a data processing subsystem. The time when the alarm signal is generated and the time when the countermeasure device emits the laser can both be recorded by the data processing subsystem, thereby testing the alarm reaction time and the countermeasure reaction time. The entire process is fully automated, avoiding the precision errors of manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the platform structure of this application;

[0028] Figure 2 This is a deployment diagram of this application;

[0029] Figure 3 It is a data flow diagram of this application;

[0030] Figure 4 This is a flow chart of the alarm time testing method of this application;

[0031] Figure 5 This is a flow chart of the interference reaction time and system reaction time testing method of the present application.

[0032] Explanation of the accompanying drawings: 1. GPS time synchronization subsystem, 2. Data processing subsystem, 3. Electronic control system, 4. First light-shielding shutter, 5. First target source, 6. Second light-shielding shutter, 7. Second target source, 8. Second infrared point source, 9. Second detection and response unit, 10. First infrared point source, 11. First detection and response unit, 12. Target simulation device, 13. Product under test; 21. Guide rail, 22. Support platform, 23. Cable. DETAILED DESCRIPTION

[0033] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0034] Since traditional reaction time testing methods cannot automatically obtain each timestamp, it is necessary to manually replay the recorded images in combination with the timestamps to calculate and evaluate the reaction time, resulting in low reaction time acquisition accuracy and other problems. The present invention provides a test platform for the reaction time of infrared alarm and countermeasure equipment, including an electronic control system and a target simulation device and a product under test connected thereto. The product under test is an infrared alarm and countermeasure equipment, and multiple sets of target simulation devices are arranged in a sliding manner along the circumferential direction within the field of view of the product under test; the target simulation device can emit medium-wave infrared light required by the infrared alarm sensor of the product under test, and can also capture the interference energy emitted by the product under test; the electronic control system synchronizes the time of the target simulation device and the product under test, and can accurately obtain the moment when the target simulation device emits medium-wave infrared light, the infrared alarm moment of the product under test, the moment when the product under test locks the position of the target simulation device and emits a laser beam, and the moment when the target simulation device detects the interference energy, thereby calculating the reaction time of the infrared alarm and countermeasure equipment.

[0035] The target simulation device includes a target source, a light-shielding shutter, a detection and response unit, and an infrared point source. The target source is used to provide infrared radiation of a fixed band, that is, the medium-wave infrared light required by the infrared alarm sensor. A light-shielding shutter is arranged along the emission direction of the target source to precisely control the emission of infrared light. A support platform and a guide rail are arranged below the target source to support it to perform circular motion in the azimuth direction; the infrared point source is used to provide the infrared light required for the countermeasure device to lock the target; the detection and response unit collects the laser beam emitted by the countermeasure product through the front auxiliary optical path, and records the time point of receiving the laser through the data processing subsystem; the light-shielding shutter is used in conjunction with the target source to release the infrared signal, and the infrared point source is used in conjunction with the detection and response unit to capture the laser beam of the product under test.

[0036] The electronic control system includes a GPS time synchronization subsystem and a data processing subsystem. The data processing subsystem control system is respectively connected to the target source, the light-shielding shutter, the GPS time synchronization subsystem, the detection and response unit, and the comprehensive information unit of the device under test; the data processing subsystem control system is used to control the light-shielding shutter to control the emission time of the target source infrared light. The data processing subsystem can uniformly synchronize the time of the infrared alarm and countermeasure equipment under test and the target source and the detection and response unit through the GPS time synchronization subsystem; the infrared alarm and countermeasure equipment under test is connected to the data processing subsystem through a dedicated test interface; the data processing subsystem is mainly responsible for the operation drive of the test platform. The data subsystem of the data processing subsystem is presented in the form of software and has a human-computer interaction interface, which can realize functions such as equipment information entry, equipment control, result display, test design, test progress display, data export, and historical data viewing.

[0037] Preferably, the data processing subsystem includes an interference test unit and a control computer. The interference test unit is primarily used to connect to the product under test and various execution devices, controlling the operation of devices such as the target source, light-shielding shutter, infrared point source, detection and response unit, and GPS time synchronization subsystem. It also receives feedback from the GPS time synchronization subsystem, detection and response unit, and the product under test, accurately measuring the response time of each link in the system under test. The control computer's background data processing system can calculate alarm response time, target interception and tracking time, system response time, interference response time, and multi-target interference time intervals.

[0038] As a preferred embodiment, the target source is a mid-infrared band light of 3.7 μm to 4.8 μm. In some embodiments with special requirements, the emission of infrared light in a special band can be achieved by adding a filter in front of the target source.

[0039] As a preferred embodiment, the target sources of the two target simulation devices are respectively mounted on support platforms, which are slidably mounted on annular guide rails through the support platforms, and the azimuth difference θ can be continuously adjusted within a range of 10° to 180°;

[0040] As a preferred method, the light-shielding shutter is used in conjunction with the target source and is program-controlled by the data processing subsystem; the light-shielding shutter has an opening and closing feedback circuit, which can make the alarm infrared light source pass through the light-shielding shutter according to the preset time, and the alarm product captures the infrared light signal.

[0041] As a preferred embodiment, the detection and response unit is designed with a laser beacon that can emit a cross cursor. Before testing, the cross cursor can be aligned with the optical axis center of the optical system of the tested countermeasure product, thereby ensuring that the laser can enter the detection and response unit.

[0042] In order to achieve the above-mentioned purpose of the invention, the present invention also provides a method for testing the alarm reaction time and the countermeasure reaction time using the infrared light source, light-shielding shutter, data processing subsystem, etc. of the above-mentioned platform. The method uses the light-shielding shutter to accurately control the emission time of the alarm infrared light source, and accurately records the time when the alarm and countermeasure products under test generate alarm signals and emit lasers to determine the alarm reaction time and the countermeasure reaction time.

[0043] As a preferred embodiment, the testing method comprises the following steps:

[0044] Step (a): Place two sets of target simulation equipment (integrated with target source, light-shielding shutter, support platform, detection and response unit, GPS time synchronization unit, and infrared point source) 2 meters in front of the wide field of view warning system;

[0045] Step (b): Turn on the cross laser pointer on the target simulation device, adjust the target source and the infrared point source as a whole, align the center of the cross with the optical axis of the countermeasure system, and lock the tooling.

[0046] Step (c): open the target source on one side, the control system controls the light-shielding shutter to open, and records the light-shielding shutter opening time t0; the target source radiation energy is identified by the alarm device and an alarm signal is given, reporting time t1, the countermeasure device adjusts the optical axis to the target alarm direction according to the alarm signal, the infrared receiving unit of the countermeasure device accurately captures the point target, locks the countermeasure target and reports time t2, the countermeasure device receives the interference signal and emits laser interference, the detection response unit on the target simulation device detects the interference energy and then feeds back a pulse signal, and the data processing system analyzes the rising edge of the pulse wave and gives time t3.

[0047] Step (d): In the experiment of testing the multi-target interference time interval, turn on two sets of target simulation systems at the same time. After going through the test process described in the above steps in sequence, record the pulse rising edge time t4 when the detection response unit captures the laser. (t4-t3) is the multi-target interference time interval.

[0048] As a preferred method, the above-mentioned test steps involve laser emission and eye safety protection requirements. To avoid harm to the operator and other experimental personnel, this solution has designed an enclosure structure from a system-level perspective. The enclosure measures 1m×2m and is composed of multiple enclosures connected and placed in the direction of possible laser exposure. The enclosure uses a pulley structure for easy storage.

[0049] The above technical solution is further described below with reference to the accompanying drawings:

[0050] Example 1

[0051] Reference Figure 1As shown, this embodiment provides a test platform for the reaction time of infrared alarm and countermeasure equipment, including a detection and response unit 9 / 11 for detecting the laser signal of the product under test 13, an infrared point source 8 / 10 for providing the infrared light required by the product under test 13, a target source 5 / 7 for providing the medium-wave infrared light required by the product under test 13, a light-shielding shutter 4 / 6 for controlling the emission moment of the target source 5 / 7, a GPS time synchronization subsystem 1 for performing time synchronization on the platform, and a data processing subsystem 2 responsible for the entire platform.

[0052] Preferably, the target source 5 / 7 is a medium-wave infrared target source, and the main emitted light is infrared light in the 3-5um band. Band filtering can be performed by adding filters to meet the requirements of the product under test 13.

[0053] Preferably, the GPS time synchronization subsystem 1 has a synchronization accuracy better than 200ns, a time information output channel of no less than 6, and a timing accuracy better than 30ns.

[0054] Preferably, the response time of the light-shielding shutter 4 / 6 is within 100ms, and the opening time is 15ms. A light-shielding shutter opening position signal can be fed back to determine the precise moment when the target source emits infrared radiation.

[0055] Preferably, the detection and response unit 9 / 11 operates at a wavelength ranging from 1 μm to 5 μm.

[0056] Preferably, the radiation uniformity of the medium-wave infrared light of the target source 5 / 7 is not less than 85%.

[0057] Preferably, the GPS time synchronization subsystem 1 performs GPS synchronization timing on the data processing subsystem 2, the target source 5 / 7 and the product under test 13 through the GPS synchronization clock device for the processing subsystem connected thereto.

[0058] Preferably, the data processing subsystem 3 is mainly responsible for driving the operation of the system, is presented in the form of software, has a human-computer interaction interface, and can realize functions such as equipment information entry, equipment control, result display, test design, test progress display, data export, and historical data viewing.

[0059] Example 2

[0060] Reference Figure 2 As shown in FIG, this embodiment illustrates the deployment of a test platform for infrared alarm and countermeasure device reaction time. The data processing subsystem 2 and the product under test 13 are deployed on different support platforms 22 to facilitate test execution and personnel operation.

[0061] The size of the support platform 22 must be sufficient to accommodate relevant equipment and facilitate operation.

[0062] Two sets of target sources with light-shielding shutters, the detection and response unit, and the infrared point source 8 / 10 will be arranged on a circular guide rail 21 that is substantially level with the product 13 under test.

[0063] Preferably, the azimuth difference between the two sets of target simulation devices 12 with light-shielding shutters is continuously adjustable, with a maximum of 180°, and has a pitch angle adjustment function.

[0064] Preferably, the product 13 to be tested is located at the inner center of the annular guide rail 21, and the platform floor occupies a space no larger than 5m×5m.

[0065] Example 3

[0066] Reference Figure 3 As shown in Figure 2, this embodiment illustrates the data flow of a test platform for infrared alarm and countermeasure device response time. The GPS time synchronization subsystem 1 performs unified GPS timing synchronization on the tested product 13, target sources 5 / 7, light-shielding shutters 4 / 6, infrared point sources 8 / 10, detection and response units 9 / 11, and data processing subsystem 2.

[0067] Data processing subsystem 2 includes an interference test unit and a control computer. The interference test unit is primarily used to connect to the product under test 13 and various execution devices, control the operation of devices such as the infrared target source, light-shielding shutter, infrared point source, detection and response unit, and GPS time synchronization subsystem 1, receive feedback from the GPS time synchronization subsystem 1, the detection and response unit, and the product under test 13, and accurately measure the response time of each link in the system under test.

[0068] The control computer's backend data processing system calculates and analyzes alarm response time, target acquisition and tracking time, system response time, interference response time, and multi-target interference time intervals. The control computer's human-machine interface provides functions such as device information entry, device control, result display, test design, test progress display, data export, and historical data viewing.

[0069] Example 4

[0070] Reference Figure 4 As shown, this embodiment provides a method for testing alarm reaction time using the platform in Example 1. The testing method includes the following steps:

[0071] Step (a): After the equipment is started, each instrument is initialized.

[0072] Step (b): After initialization is completed, the GPS time synchronization subsystem is used to perform time synchronization calibration on the interference device under test and the interference test unit.

[0073] Step (c): Control the startup target source.

[0074] Step (d): Control the opening of the light-shielding shutter through TTL triggering, collect feedback from the light-shielding shutter photoelectric proximity switch, and record the light-shielding shutter opening time t0 and upload it to the data processing subsystem.

[0075] Step (e): The system always waits for the feedback information from the alarm processing system.

[0076] Step (f): The alarm processing system receives the target source signal and returns the time information.

[0077] Step (g): After receiving the feedback information, the interference test unit packages the time information t1 and sends it to the data processing subsystem.

[0078] Step (h): The data processing subsystem calculates the alarm time (t1-t0).

[0079] Example 5

[0080] Reference Figure 5 As shown, this embodiment provides a method for testing interference reaction time and system reaction time using the platform in Example 1. The testing method includes the following steps:

[0081] Step (1): Power on the device and initialize all software and instruments.

[0082] Step (2): After initialization is completed, the GPS time synchronization subsystem is used to perform time synchronization calibration on the interference device under test and the interference test unit.

[0083] Step (3): Control the start of the target source and control the start of the laser detection response unit.

[0084] Step (4): Control the target source to operate, supply power to the target source AB, and control the opening of the light-shielding shutter through TTL triggering at time t0.

[0085] Step (5): After receiving the infrared target information, the countermeasure device processes the data. After the target source radiation energy is identified by the alarm device, an alarm signal is given and the reporting time is t1;

[0086] Step (6): the adversarial device searches for a laser detector, i.e., a detection response unit;

[0087] Step (7): The countermeasure device emits lasers to the laser detector (detection response unit) A and the laser detector B respectively, and reports the time t2;

[0088] Step (8): After receiving the laser, the laser detector A generates time information t3 and transmits it back to the data processing subsystem;

[0089] Step (9): After receiving the laser, the laser detector B generates time information t4 and transmits it back to the data processing subsystem;

[0090] Step (10): the data processing subsystem receives the time information returned by the interference test unit;

[0091] Step (11): After receiving the time information of each stage, the data processing subsystem summarizes and processes the information to calculate the interference reaction time (t2-t1) and the system reaction time (t2-t0), thus completing the measurement.

[0092] It should be noted that for the sake of simplicity, the embodiments of the present application are described as a series of component combinations. However, those skilled in the art should be aware that the device of the present application is not limited to the materials and components described, because according to the present application, certain materials and components can be replaced by other materials and components. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the present application.

[0093] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A test platform for infrared alarm and countermeasure equipment response time, characterized by: It includes an electronic control system, a target simulation device connected thereto, and a product under test. The product under test is an infrared warning and countermeasure device. Multiple sets of target simulation devices are circumferentially arranged in a sliding manner within the field of view of the product under test. The target simulation device can emit the medium-wave infrared light required by the infrared warning sensor to the product under test, and can also capture the interference energy emitted by the product under test. The target simulation device includes a target source, a light-shielding shutter, a detection and response unit, and an infrared point source. The target source emits infrared radiation of a fixed wavelength band, and a light-shielding shutter is set at the starting point of the emission path. The light-shielding shutter is controlled to control the emission time of the target source infrared light. The detection and response unit collects the interference laser beam emitted by the countermeasure device through the front auxiliary optical path. The infrared point source is used to provide the infrared light required for the countermeasure device to lock onto the target; The electronic control system synchronizes the timing of the target simulation device and the product under test, and can accurately obtain the moment when the target simulation device emits medium-wave infrared light, the moment when the product under test issues an infrared alarm, the moment when the product under test locks the position of the target simulation device and emits a laser beam, and the moment when the target simulation device detects interference energy, thereby calculating the infrared alarm and countermeasure device reaction time.

2. A test platform for infrared alarm and countermeasure equipment response time according to claim 1, characterized in that: The two sets of target simulation equipment are installed on the annular guide rail through a supporting platform, and the azimuth difference θ can be continuously adjusted within 10° to 180°.

3. The test platform for infrared alarm and countermeasure equipment reaction time according to claim 1, characterized in that: The target source emits light in the mid-infrared band of 3.7 μm to 4.8 μm.

4. The test platform for infrared alarm and countermeasure equipment reaction time according to claim 1, characterized in that: The detection and response unit is provided with a laser marker that can emit a cross cursor. Before testing, the cross cursor is aligned with the center of the optical axis of the optical system of the product being tested, thereby ensuring that the laser can enter the detection and response unit.

5. The test platform for infrared alarm and countermeasure equipment reaction time according to claim 1, characterized in that: The electronic control system includes a GPS time synchronization subsystem and a data processing subsystem. The GPS time synchronization subsystem is used to uniformly synchronize the time between the target source and the detection response unit of the tested product and the target simulation device; the data processing subsystem is respectively connected to the target source, the light-shielding shutter, the detection response unit, the GPS time synchronization subsystem, and the tested product, and is used to control the execution of the actions of each part and record the execution time of the actions.

6. A test platform for infrared alarm and countermeasure equipment reaction time according to claim 5, characterized in that: The data processing subsystem includes an interference test unit and a control computer; the interference test unit is connected to the product under test and each execution component, controls the execution of the target source, light-shielding shutter, infrared point source, detection and response unit and GPS time synchronization subsystem, receives feedback information from the GPS time synchronization subsystem, detection and response unit and the product under test, and accurately measures the response time of each link of the product under test; the background data processing system of the control computer can calculate the alarm reaction time, target interception and tracking time, system reaction time, interference reaction time and multi-target interference time interval.

7. The test platform for infrared alarm and countermeasure equipment reaction time according to claim 1, characterized in that: The calculation method of the infrared alarm and countermeasure equipment reaction time is as follows: respectively obtain the time when the first target simulation device emits medium-wave infrared light t 0. Infrared alarm time of the tested product t 1. The moment when the product under test locks onto the position of the first target simulation device and emits the laser beam t 2. The moment when the first target simulation device detects the interference energy t 3. By t 1- t 0 calculates the alarm reaction time; t 2- t 1Calculate the interference reaction time; t 2- t 0 calculates system response time.

8. A test platform for infrared alarm and countermeasure equipment reaction time according to claim 7, characterized in that: The method for calculating the time interval when the infrared warning and countermeasure equipment is interfered with by multiple targets is to obtain the time when the second target simulation equipment detects the interference energy. t 4. By t 4- t 3. Calculate the multi-target interference time interval.

9. A method for testing the reaction time of infrared alarm and countermeasure equipment, implemented based on the test platform for the reaction time of infrared alarm and countermeasure equipment according to any one of claims 1 to 8; characterized in that The specific steps are as follows: Place two sets of target simulation equipment at designated locations in front of the wide-field-of-view infrared warning and countermeasure equipment; Turn on the cross laser pointer on the target simulation device, adjust the target source and infrared point source on the target simulation device as a whole, align the center of the cross with the optical axis of the countermeasure device, and lock the installation tooling of the target simulation device; Turn on the target source of the first target simulation device, control the light-shielding shutter of the first target simulation device to open by the electronic control system, and record the light-shielding shutter opening time t 0; After the target source radiation energy is identified by the alarm device, an alarm signal is given and the reporting time t 1. The countermeasure device adjusts the optical axis to the target warning direction according to the alarm signal. The infrared receiving unit of the countermeasure device accurately captures the point target, locks the countermeasure target and emits interference laser, reporting the time t 2. The detection response unit on the first target simulation device detects the interference energy and then feeds back a pulse signal. The data processing system analyzes the rising edge of the pulse wave and gives the time. t 3; Depend on t 1- t 0 calculates the alarm response time; t 2- t 1. Calculate the interference reaction time; When conducting a multi-target interference time interval test, open two target simulation systems at the same time, go through the above steps in sequence, and t After 2 seconds, the infrared warning and countermeasure device rotates at an angle of θ, tracks and locks the infrared point source of the second target simulation device, and then emits a second interfering laser beam. After the laser beam is captured by the detection and response unit, the data processing subsystem records this time point. t 4 moments; Depend on t 4- t 3. Calculate the multi-target interference time.

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