CN108414261B - Plateau environment performance test system and test method for laser irradiator - Google Patents
Plateau environment performance test system and test method for laser irradiator Download PDFInfo
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Abstract
The invention discloses a laser irradiator plateau environment performance test system and a test method thereof, wherein the test system comprises a laser irradiator and a plurality of test modules for simulating and testing the working condition of the laser irradiator under the plateau environment; the laser irradiator consists of a laser ranging target indicator, a thermal image component, a tracking angle measuring device, an execution synchronization module and a battery pack; the test module comprises a laser ranging target indicator test module, a thermal image assembly test module and a storage battery test module; the method comprises an irradiation deviation angle test method, an irradiation distance test method, a coding precision test method, a detection and identification distance simulation test method and a battery pack performance test method; according to the plateau environment performance test system and the plateau environment performance test method for the laser irradiator, a plurality of performance test modules for detecting the influence of the plateau environment on the laser irradiator are built, an effective test method is provided, and plateau test subjects are scientifically set.
Description
Technical Field
The invention relates to a laser irradiator plateau environment performance test system and a test method thereof, belonging to the technical field of laser irradiator performance tests.
Background
The laser irradiator is an important subsystem of the common armament system, mainly for finding, identifying, tracking and irradiating the target with laser, and the performance of the laser irradiator directly affects the overall efficiency of the system; the plateau area has the characteristics of low air pressure, large temperature difference, strong solar radiation and the like, and can cause the change of the sealing performance of the visible light sighting telescope, the irradiation performance, the ranging performance, the coding performance, the detection and identification performance of a thermal image component, the refrigerating performance and the like of the laser ranging target indicator, and the conventional laser irradiator has an effective test system and a test method aiming at the performance deficiency in the plateau environment. Therefore, the invention provides a system for testing the sighting performance, the ranging performance, the irradiation performance, the coding performance and the thermal imaging performance of the laser irradiator in the plateau environment, and provides a corresponding testing method which can be applied to the plateau adaptability evaluation of the laser irradiator.
Disclosure of Invention
In order to solve the problems, the invention provides a plateau environment performance test system and a test method thereof for a laser irradiator, a plurality of performance test modules for detecting the influence of the plateau environment on the laser irradiator are built, an effective test method is provided, and plateau test subjects are scientifically set.
The plateau environment performance test system of the laser irradiator comprises the laser irradiator and a plurality of test modules for simulating and testing the working condition of the laser irradiator under the plateau environment; the laser irradiator consists of a laser ranging target indicator, a thermal image component, a tracking angle measuring device, an execution synchronization module and a battery pack; the test module comprises a laser ranging target indicator test module, a thermal image assembly test module and a storage battery test module;
the laser ranging target indicator test module comprises a laser diffuse reflection target serving as a standard target, a laser irradiator monitoring system for measuring the distance deviation between the energy center of a laser pulse spot and a cross line of a diffuse reflection target plate and the laser emission time of the laser spot, a guide head signal acquisition system for monitoring a laser pulse echo signal and measuring the distance between the standard target and the laser ranging target indicator, and a comprehensive detector for detecting the laser pulse energy, wherein the laser irradiator monitoring system, the guide head signal acquisition system and the comprehensive detector are uniform existing equipment, and the specific structure and the working principle thereof are not described in detail; the laser irradiator is movably arranged on one side of the laser diffuse reflection target through a mounting track, and laser pulses emitted by the laser irradiator irradiate on a cross line of the laser diffuse reflection target;
the thermal imaging assembly test module comprises a thermal target unit with controllable temperature output, a background target consistent with the infrared radiation characteristic of the target surface, a thermal monitor imager for detecting the output condition of the infrared radiation of the thermal target unit, and a main control computer for comparing the output image of the infrared radiation of the thermal target unit with a set infrared image; the thermal target unit consists of a temperature controller, a temperature detection sensor and a target element; the temperature detection sensor and the target element are respectively and electrically connected with the temperature controller; the temperature controller is in communication connection with the main control computer through a wireless local area network system;
the storage battery test module comprises a timing instrument for measuring the refrigerating time from the start to the normal operation of the thermal imaging assembly and an alarm unit for low-capacity alarm of the battery pack; the alarm unit is electrically connected with the battery pack.
Further, the laser ranging target indicator consists of a laser emitter and an optical standard; the laser transmitter is a diode pump laser; the optical standard device comprises a beam expanding telescope, a white light aiming receiving system and a photoelectric receiver; the photoelectric receiver is electrically connected with the white light aiming receiving system; the sighting telescope of the white light sighting receiving system is a monocular sighting telescope for sighting measurement; the photoelectric receiver is an integrated receiving amplifier; the thermal image component consists of an infrared telescope, a scanner, a detector, a refrigerator component, a signal processing circuit, a driving/controlling circuit and a display and control circuit; the tracking angle measuring device consists of an angle measuring mechanism, a height machine, a azimuth machine, a control processing circuit and an execution synchronization module; the angle measuring mechanism comprises a photoelectric shaft angle encoder and a singlechip processing system; the execution synchronization module consists of an execution synchronization board and a circuit, and the central processing unit is a chip microprocessor; the battery pack is a lithium ion storage battery.
Further, the wireless local area network system comprises a wireless router terminal, a wireless router and a plurality of network servers, wherein the wireless router is in communication connection with the wireless router terminal; the wireless router is electrically connected with the temperature controller; the network server is electrically connected with the master control computer.
The invention relates to a test method of a laser irradiator plateau environment performance test system, which comprises an irradiation deviation angle test method, an irradiation distance test method, a coding precision test method, a detection and identification distance simulation test method and a battery pack performance test method.
Further, the irradiation deviation angle test method comprises the following specific operation steps: the laser ranging target indicator test module is utilized to carry out irradiation deviation angle test, the deviation of the energy center of a laser pulse spot emitted by the laser irradiator and the aiming axis is used as the laser irradiation deviation angle to the opening angle of the center of the aiming objective, the parallelism deviation between the aiming axis and the laser emission axis mentioned in the irradiator index is used as the deviation angle, when the deviation angle is evaluated, a method of dispersing in a plurality of laser emission periods is adopted,
aiming the tested laser irradiator at a standard diffuse reflection target plate reticle; emitting a laser pulse of one irradiation period; measuring the distance deviation between the energy center of gravity of the laser pulse facula and the cross line of the diffuse reflection target plate by a laser irradiator monitoring system; calculating an irradiation deviation angle of the tested laser irradiator according to the distance between the tested laser irradiator and the target plate and the distance deviation between the laser pulse spot energy center and the diffuse reflection target plate reticle, and at a certain moment, obtaining a laser irradiation deviation angle thetai;
laser irradiation deviation angle of kth laser irradiation period
The calculation is carried out according to the following formula:
in the method, in the process of the invention,
a laser irradiation deviation angle indicating a kth laser irradiation period;
θ i an irradiation deviation angle of the ith laser pulse in the laser irradiation period;
n represents the number of laser spots in the laser irradiation period.
Further, the irradiation distance test method comprises the following specific operation steps: the method comprises the steps of carrying out irradiation distance test by using a laser ranging target indicator test module, respectively using a target with 2.3m multiplied by 2.3m of front projection and a laser diffuse reflection target board with 3.0m multiplied by 3.0m of front projection as standard targets under the condition of 10km of visibility, monitoring an indicator by using a laser irradiator monitoring system, monitoring a pilot head signal by using a pilot head signal acquisition system, erecting the pilot head monitoring system at a certain distance from the standard targets, monitoring a laser pulse echo signal, measuring the distance between the standard targets and the indicator, and detecting laser pulse energy by using a comprehensive detector before and after the test.
Further, the coding precision test method comprises the following specific operation steps: the coding precision refers to the deviation between the interval time of two adjacent laser pulses emitted by the laser target indicator and a set value; the coding precision directly relates to whether the seeker can normally receive the laser pulse, and if the coding precision exceeds the standard, the seeker cannot receive the laser pulse signal; therefore, the assessment of dynamic coding accuracy is very important; the laser irradiator irradiates the standard target plate according to three factors of near, middle and long distances, namely different horizontal distances, wherein each horizontal distance is a laser code, a laser irradiator monitoring system is used for measuring the laser emission time of a laser spot, total irradiation is carried out for 8 periods, and data statistics processing is carried out according to formulas (3) and (4);
laser coding accuracy T of jth laser irradiation period j Calculating according to a formula;
T j ＝max{|T i |}； (3)
wherein: t (T) j The laser coding precision of the jth laser irradiation period is expressed, and mu s;
T i representing the difference between the ith adjacent laser pulse emission time interval and a prescribed value in the jth laser irradiation period, μs;
coding precision T of kth laser coding k Calculating according to a formula;
T k ＝max{|T j |}； (4)
wherein: t (T) k Represents the k-th laser coding precision, mu s.
Further, the detection and recognition distance simulation test method comprises the following specific operation steps: the thermal imaging assembly test module is utilized to carry out detection and recognition distance simulation test,
1) The target characteristics are simulated and analyzed with respect to accuracy,
the specific simulation method is that according to different target types observed by the infrared thermal imaging component, a square thermal target unit is used for simulating the shape and the size of a required target; the thermal target unit is a cuboid module with a heating function and special properties, and integrates various different test use conditions; the simulation of targets with different shapes is realized in two ways, one way is to cover the observation targets to be simulated by a plurality of heat target units, and then heat the heat target units to generate the simulation targets; the other mode is to directly form a simulation target by using the heat target units and then heat the simulation target, the mode has the advantages that the heat target units needing to be installed and debugged are fewer, time and labor are saved, and the size and the position of the target are not adjustable;
different observation targets frequently used in the action distance test, the simulation accuracy of the target system is mainly determined by the size and arrangement mode of the thermal target units, and the calculation formula of the target simulation accuracy is as follows:
wherein: sigma represents the target simulation accuracy;
S true sense Representing the real area of the target;
S mould Representing the area of the simulation target;
2) The environmental characteristic is simulated and analyzed with precision,
the specific practice of the three factors of the ambient temperature, the visibility and the relative humidity in the working distance test is that the test is still carried out in the field, and the three limiting factors of the ambient temperature, the visibility and the relative humidity can be met only by selecting proper weather in proper seasons;
the temperature difference between the target and the background belongs to a key factor, an accurate temperature control method is adopted to control the temperature difference between the simulated target and the background in a simulation test, a thermal target unit, a background target, a control system and a communication system are adopted to form an infrared standard target system, the center 3cm X6 cm of the infrared radiation target surface of the infrared standard target system is used as a target element area, and the temperature of the target element in the area can be controlled accurately at 0.5 ℃;
the whole target system consists of a temperature output controllable thermal target unit and a background target consistent with the infrared radiation characteristic of the target surface, wherein the thermal target unit adopts a principle of double closed-loop temperature control, and an internal closed-loop control system consists of a temperature controller, a temperature detection sensor and a target element, so that the temperature of the thermal target unit is detected and controlled, and the accurate adjustment of the temperature difference between the target and the background is realized; detecting the output condition of infrared radiation of a thermal target unit by a thermal monitoring imager, comparing the set infrared images by a main control computer, and communicating with a temperature controller by a wireless local area network system consisting of a network server and wireless routing equipment to realize the temperature control of the target unit;
when the action distance test is carried out in the field, the requirements of the ambient temperature, the visibility and the relative humidity can be met only by selecting proper weather; the simulation accuracy calculation of the temperature difference between the target and the background is shown in a formula (6),
wherein δ represents the temperature simulation accuracy;
T true sense A temperature value representing an index requirement;
T mould Representing a temperature value of the system simulation;
3) The simulation precision of the test is that,
the experimental simulation precision consists of two parts, namely target characteristic simulation precision and environment characteristic simulation precision, an equal weight principle is adopted in precision synthesis, a precision synthesis formula is shown in formula (7),
where ε represents the experimental simulation accuracy.
Further, the battery pack performance test method comprises the following specific operation steps: the performance test of the storage battery is carried out by utilizing a storage battery test module, under the condition of the natural environment of a plateau, a fully charged lithium ion battery pack is used for supplying power to a laser ranging target indicator, a thermal image component of the laser ranging target indicator is started, and the refrigerating time from the starting to the normal working of the thermal image component is measured by using a timer; and when the thermal imaging component is in a working state, transmitting single-period laser pulses by using the laser ranging target indicator until the alarm unit carries out low-capacity alarm on the battery pack, and checking continuous working time and maximum laser irradiation period number.
Compared with the prior art, the plateau environment performance test system and the plateau environment performance test method for the laser irradiator are provided with a plurality of performance test modules for detecting the influence of the plateau environment on the laser irradiator, an effective test method is provided, and plateau test subjects are scientifically set; an external field infrared target simulation system is established, and stable and controllable tests of various targets under a complex background environment are realized; by adopting the method of combining the real target and the simulation target test, the temperature difference between the target and the background can be accurately controlled, the test cost can be reduced, and the detection and identification distance can be accurately estimated.
Drawings
Fig. 1 is a schematic block diagram of the overall system of the present invention.
Fig. 2 is a schematic diagram of an irradiation deviation angle test of a laser irradiator of the present invention.
Fig. 3 is a schematic view of the laser irradiator irradiation distance detection of the present invention.
FIG. 4 is a test flow chart of the detection and identification distance simulation test of the present invention.
Fig. 5 is a schematic diagram of a simulation target of the present invention.
Fig. 6 is a schematic block diagram of an infrared standard target system of the present invention.
The components in the drawings are marked as follows: 1-laser irradiator, 2-laser ranging target indicator test module, 21-laser diffuse reflection target, 22-laser irradiator monitoring system, 23-seeker signal acquisition system, 24-comprehensive detector, 3-thermal imaging component test module, 31-thermal target unit, 311-temperature controller, 312-temperature detection sensor, 313-target element, 32-background target, 33-monitoring thermal imager, 34-master control computer, 35-wireless local area network system, 351-wireless router terminal, 352-wireless router, 353-network server, 4-storage battery test module, 41-timing instrument and 42-alarm unit.
Detailed Description
The laser irradiator plateau environment performance test system as shown in fig. 1 to 3, 5 and 6 comprises a laser irradiator 1 and a plurality of test modules for simulating and testing the working condition of the laser irradiator 1 in the plateau environment; the laser irradiator 1 consists of a laser ranging target indicator, a thermal image component, a tracking angle measuring device, an execution synchronization module and a battery pack; the test module comprises a laser ranging target indicator test module 2, a thermal imaging assembly test module 3 and a storage battery test module 4;
the laser ranging target indicator test module 2 comprises a laser diffuse reflection target 21 serving as a standard target, a laser irradiator monitoring system 22 for measuring the distance deviation between the energy center of gravity of a laser pulse and the cross line of a diffuse reflection target plate and the laser emission time of the laser spot, a guide head signal acquisition system 23 for monitoring a laser pulse echo signal and measuring the distance between the standard target and a laser ranging target indicator, and a comprehensive detector 24 for detecting the laser pulse energy; the laser irradiator 1 is movably arranged on one side of the laser diffuse reflection target 21 through a mounting track, and laser pulses emitted by the laser irradiator are irradiated on a cross line of the laser diffuse reflection target;
the thermal imaging assembly test module 3 comprises a thermal target unit 31 with controllable temperature output, a background target 32 consistent with the infrared radiation characteristic of the surface of the target, a thermal monitor imager 33 for detecting the output condition of the infrared radiation of the thermal target unit, and a main control computer 34 for comparing the output image of the infrared radiation of the thermal target unit with a set infrared image; the thermal target unit 31 is composed of a temperature controller 311, a temperature detection sensor 312 and a target 313; the temperature detection sensor 312 and the target 313 are respectively electrically connected with the temperature controller 311; the temperature controller 311 is in communication connection with the main control computer 34 through the wireless local area network system 35;
the storage battery test module 4 comprises a timing instrument 41 for measuring the refrigerating time from the starting to the normal working of the thermal imaging assembly and an alarm unit 42 for alarming low capacity of the battery pack; the alarm unit 42 is electrically connected to the battery pack.
The laser ranging target indicator consists of a laser emitter and an optical standard; the laser transmitter is a diode pump laser; the optical standard device comprises a beam expanding telescope, a white light aiming receiving system and a photoelectric receiver; the photoelectric receiver is electrically connected with the white light aiming receiving system; the sighting telescope of the white light sighting receiving system is a monocular sighting telescope for sighting measurement; the photoelectric receiver is an integrated receiving amplifier.
The thermal image assembly consists of an infrared telescope, a scanner, a detector, a refrigerator assembly, a signal processing circuit, a driving/controlling circuit and a display and control circuit.
The tracking angle measuring device consists of an angle measuring mechanism, a height machine, a azimuth machine, a control processing circuit and an execution synchronization module; the angle measuring mechanism comprises a photoelectric shaft angle encoder and a singlechip processing system.
The execution synchronization module consists of an execution synchronization board and a circuit, and the central processing unit is a chip microprocessor.
The battery pack is a lithium ion storage battery.
When the laser ranging target indicator test module is used for performing the irradiation distance test of the laser ranging target indicator, the laser diffuse reflection target of the laser ranging target indicator test module 2 comprises a laser diffuse reflection target plate with front projection of 2.3m multiplied by 2.3m and a laser diffuse reflection target plate with front projection of 3.0m multiplied by 3.0 m.
The wireless lan system 35 includes a wireless router terminal 351, and a wireless router 352 and a plurality of network servers 353 communicatively connected to the wireless router terminal 351; the wireless router 352 is electrically connected with the temperature controller 311; the web server 353 is electrically connected to the host computer 34.
The invention relates to a test method of a laser irradiator plateau environment performance test system, which comprises an irradiation deviation angle test method, an irradiation distance test method, a coding precision test method, a detection and identification distance simulation test method and a battery pack performance test method, wherein the specific operation method is as follows:
(1) The irradiation deviation angle is tested by using a laser ranging target indicator test module, as shown in figure 2, the deviation of the energy center of a laser pulse spot emitted by a laser irradiator and an aiming axis is used as the laser irradiation deviation angle to the opening angle of the center of an aiming objective lens, the parallelism deviation between the aiming axis and the laser emission axis, which is mentioned in the irradiator index, is the deviation angle, when the deviation angle is evaluated, a method for dispersing in a plurality of laser emission cycles is adopted,
aiming a tested laser irradiator (coordinates set as A (x 1, y1, z 1)) at a standard diffuse reflection target plate (diffuse reflectance is specified by an index) reticle (coordinates set as O (x 0, y0, z 0)); emitting a laser pulse of one irradiation period; measuring a distance deviation of the energy center of gravity (coordinates set as B (xi, yi, zi)) of the laser pulse spot and the diffuse reflection target plate reticle by a laser irradiator monitoring system; calculating an irradiation deviation angle of the tested laser irradiator according to the distance between the tested laser irradiator and the target plate and the distance deviation between the laser pulse spot energy center and the diffuse reflection target plate reticle, and at a certain moment, obtaining a laser irradiation deviation angle thetai;
laser irradiation deviation angle of kth laser irradiation period
The calculation is carried out according to the following formula:
in the method, in the process of the invention,
a laser irradiation deviation angle indicating a kth laser irradiation period;
θ i an irradiation deviation angle of the ith laser pulse in the laser irradiation period;
n represents the number of laser spots in the laser irradiation period;
(2) The irradiation distance is tested by using a laser ranging target indicator test module, as shown in fig. 3, under the condition of 10km of visibility, a target with 2.3m multiplied by 2.3m and a laser diffuse reflection target plate with 3.0m multiplied by 3.0m projected from the front are respectively used as standard targets, a laser irradiator monitoring system is used for monitoring the indicator, a pilot head signal acquisition system is used for monitoring the pilot head signal, a pilot head monitoring system is erected at a certain distance from the standard targets, a laser pulse echo signal is monitored, the distance between the standard targets and the indicator is measured, and before and after the test, the laser pulse energy is detected by using a comprehensive detector;
(3) The coding precision test is carried out,
the coding precision refers to the deviation between the interval time of two adjacent laser pulses emitted by the laser target indicator and a set value; the coding precision directly relates to whether the seeker can normally receive the laser pulse, and if the coding precision exceeds the standard, the seeker cannot receive the laser pulse signal; therefore, the assessment of dynamic coding accuracy is very important; the laser irradiator irradiates the standard target plate according to three factors of near, middle and long distances, namely different horizontal distances, wherein each horizontal distance is a laser code, a laser irradiator monitoring system is used for measuring the laser emission time of a laser spot, total irradiation is carried out for 8 periods, and data statistics processing is carried out according to formulas (3) and (4);
laser coding accuracy T of jth laser irradiation period j Calculating according to a formula;
T j ＝max{|T i |}； (3)
wherein: t (T) j The laser coding precision of the jth laser irradiation period is expressed, and mu s;
T i representing the difference between the ith adjacent laser pulse emission time interval and a prescribed value in the jth laser irradiation period, μs;
coding precision T of kth laser coding k Calculating according to a formula;
T k ＝max{|T j |}； (4)
wherein: t (T) k Represents the k-th laser coding precision, mu s;
(4) The detection and recognition distance simulation test is carried out by utilizing a thermal image assembly test module, and a flow chart of the detection and recognition distance simulation test is shown in fig. 4, wherein the test work flow is divided into four links of installation and initialization, wireless communication and target element control positioning, target control output and stop control; the installation and initialization stage mainly realizes the initialization of the system as power input, positioning input of a temperature controller and a first target element, correction of ambient temperature and time scale and the like; the wireless communication and the target control positioning mainly realize the intelligent identification of the target position coordinates through a wireless network, and determine the arrangement positions of the targets; the target control output is mainly to output the required infrared heat map; the stop control is mainly used for controlling the disconnection sequence and the operation method of each subsystem when the whole system stops working;
1) The target characteristics are simulated and analyzed with respect to accuracy,
the specific simulation method is that according to different target types observed by the infrared thermal imaging component, a square thermal target unit is used for simulating the shape and the size of a required target; the thermal target unit is a cuboid module with a heating function and special properties, and integrates various different test use conditions; the simulation of objects with different shapes is realized in two ways, one way is to cover the observation objects to be simulated by a plurality of heat target units, and then heat the heat target units to generate the simulation objects, as shown in fig. 5 (a), the method has the advantages that the size and the position of the objects can be adjusted according to the needs, and the defects that the heat target units needing to be installed and debugged are more, and the time and the labor are wasted; the other mode is to directly form a simulation target by using the thermal target units and then heat the simulation target, as shown in fig. 5 (b), the mode has the advantages that the thermal target units needing to be installed and debugged are fewer, time and labor are saved, and the size and the position of the target are not adjustable;
different observation targets frequently used in the action distance test, the simulation accuracy of the target system is mainly determined by the size and arrangement mode of the thermal target units, and the calculation formula of the target simulation accuracy is as follows:
wherein: sigma represents the target simulation accuracy;
S true sense Representing the real area of the target;
S mould Surface representing simulation targetAccumulating;
2) The environmental characteristic is simulated and analyzed with precision,
the specific practice of the three factors of the ambient temperature, the visibility and the relative humidity in the working distance test is that the test is still carried out in the field, and the three limiting factors of the ambient temperature, the visibility and the relative humidity can be met only by selecting proper weather in proper seasons;
the temperature difference between the target and the background belongs to a key factor, an accurate temperature control method is adopted to control the temperature difference between the simulated target and the background in a simulation test, as shown in fig. 6, the specific method is that an infrared standard target system is formed by a thermal target unit, a background target, a control system and a communication system, the center 3cm X6 cm of the infrared radiation target surface of the infrared standard target system is a target element area, and the target element temperature in the area can be controlled accurately at 0.5 ℃;
the whole target system consists of a temperature output controllable thermal target unit and a background target consistent with the infrared radiation characteristic of the target surface, wherein the thermal target unit adopts a principle of double closed-loop temperature control, and an internal closed-loop control system consists of a temperature controller, a temperature detection sensor and a target element, so that the temperature of the thermal target unit is detected and controlled, and the accurate adjustment of the temperature difference between the target and the background is realized; detecting the output condition of infrared radiation of a thermal target unit by a thermal monitoring imager, comparing the set infrared images by a main control computer, and communicating with a temperature controller by a wireless local area network system consisting of a network server and wireless routing equipment to realize the temperature control of the target unit;
when the action distance test is carried out in the field, the requirements of the ambient temperature, the visibility and the relative humidity can be met only by selecting proper weather; the simulation accuracy calculation of the temperature difference between the target and the background is shown in a formula (6),
wherein δ represents the temperature simulation accuracy;
T true sense A temperature value representing an index requirement;
T mould Representing a temperature value of the system simulation;
3) The simulation precision of the test is that,
the experimental simulation precision consists of two parts, namely target characteristic simulation precision and environment characteristic simulation precision, an equal weight principle is adopted in precision synthesis, a precision synthesis formula is shown in formula (7),
wherein epsilon represents the experimental simulation precision;
(5) The performance of the battery pack is tested by using the battery test module,
under the natural environment condition of the plateau, a fully charged lithium ion battery pack is used for supplying power to a laser ranging target indicator, a thermal image component of the laser ranging target indicator is started, and the refrigerating time from the starting to the normal working of the thermal image component is measured by a timer; and when the thermal imaging component is in a working state, transmitting single-period laser pulses by using the laser ranging target indicator until the alarm unit carries out low-capacity alarm on the battery pack, and checking continuous working time and maximum laser irradiation period number.
The above embodiments are merely preferred embodiments of the present invention, and all changes and modifications that come within the meaning and range of equivalency of the structures, features and principles of the invention are therefore intended to be embraced therein.
Claims (3)
1. A laser irradiator plateau environment performance test system comprises a laser irradiator and a plurality of test modules for simulating and testing the working condition of the laser irradiator under the plateau environment; the laser irradiator consists of a laser ranging target indicator, a thermal image component, a tracking angle measuring device, an execution synchronization module and a battery pack; the method is characterized in that: the test module comprises a laser ranging target indicator test module, a thermal image assembly test module and a storage battery test module;
the laser ranging target indicator test module comprises a laser diffuse reflection target serving as a standard target, a laser irradiator monitoring system for measuring the distance deviation between the energy center of a laser pulse spot and a cross line of a diffuse reflection target plate and the laser emission time of the laser spot, a guide head signal acquisition system for monitoring a laser pulse echo signal and measuring the distance between the standard target and a laser ranging target indicator, and a comprehensive detector for detecting the laser pulse energy; the laser irradiator is movably arranged on one side of the laser diffuse reflection target through a mounting track, and laser pulses emitted by the laser irradiator irradiate on a cross line of the laser diffuse reflection target;
the thermal imaging assembly test module comprises a thermal target unit with controllable temperature output, a background target consistent with the infrared radiation characteristic of the target surface, a thermal monitor imager for detecting the output condition of the infrared radiation of the thermal target unit, and a main control computer for comparing the output image of the infrared radiation of the thermal target unit with a set infrared image; the thermal target unit consists of a temperature controller, a temperature detection sensor and a target element; the temperature detection sensor and the target element are respectively and electrically connected with the temperature controller; the temperature controller is in communication connection with the main control computer through a wireless local area network system;
the storage battery test module comprises a timing instrument for measuring the refrigerating time from the start to the normal operation of the thermal imaging assembly and an alarm unit for low-capacity alarm of the battery pack; the alarm unit is electrically connected with the battery pack;
the laser ranging target indicator consists of a laser emitter and an optical standard; the laser transmitter is a diode pump laser; the optical standard device comprises a beam expanding telescope, a white light aiming receiving system and a photoelectric receiver; the photoelectric receiver is electrically connected with the white light aiming receiving system; the sighting telescope of the white light sighting receiving system is a monocular sighting telescope for sighting measurement; the photoelectric receiver is an integrated receiving amplifier; the thermal image component consists of an infrared telescope, a scanner, a detector, a refrigerator component, a signal processing circuit, a driving/controlling circuit and a display and control circuit; the tracking angle measuring device consists of an angle measuring mechanism, a height machine, a azimuth machine, a control processing circuit and an execution synchronization module; the angle measuring mechanism comprises a photoelectric shaft angle encoder and a singlechip processing system; the execution synchronization module consists of an execution synchronization board and a circuit, and the central processing unit is a chip microprocessor; the battery pack is a lithium ion storage battery.
2. The laser illuminator plateau environmental performance test system of claim 1, wherein: the wireless local area network system comprises a wireless router terminal, a wireless router and a plurality of network servers, wherein the wireless router is in communication connection with the wireless router terminal; the wireless router is electrically connected with the temperature controller; the network server is electrically connected with the master control computer.
3. The test method of the laser irradiator plateau environmental performance test system according to any one of claims 1 and 2, characterized in that: the method comprises an irradiation deviation angle test method, an irradiation distance test method, a coding precision test method, a detection and identification distance simulation test method and a battery pack performance test method;
the irradiation deviation angle test method comprises the following specific operation steps: the laser ranging target indicator test module is utilized to carry out irradiation deviation angle test, the deviation of the energy center of a laser pulse spot emitted by the laser irradiator and the aiming axis is used as the laser irradiation deviation angle to the opening angle of the center of the aiming objective, the parallelism deviation between the aiming axis and the laser emission axis mentioned in the irradiator index is used as the deviation angle, when the deviation angle is evaluated, a method of dispersing in a plurality of laser emission periods is adopted,
aiming the tested laser irradiator at a standard diffuse reflection target plate reticle; emitting a laser pulse of one irradiation period; measuring the distance deviation between the energy center of gravity of the laser pulse facula and the cross line of the diffuse reflection target plate by a laser irradiator monitoring system; based on the laser irradiator being tested to the target plateCalculating the irradiation deviation angle of the tested laser irradiator according to the distance, the distance deviation of the laser pulse light spot energy center and the diffuse reflection target plate cross line, and calculating the laser irradiation deviation angle theta at a certain moment i The method comprises the steps of carrying out a first treatment on the surface of the Wherein A represents the coordinate of the tested laser irradiator; o represents the coordinate of the cross line; b represents the coordinate of the energy center of gravity of the laser pulse facula; x is x 1 ,y 1 ,z 1 Respectively three-dimensional coordinate values of the point A; x is x 0 ,y 0 ,z 0 Respectively three-dimensional coordinate values of the O points; x is x i ,y i ,z i Respectively three-dimensional coordinate values of the point B;
laser irradiation deviation angle of kth laser irradiation period
The calculation is carried out according to the following formula:
in the method, in the process of the invention,
a laser irradiation deviation angle indicating a kth laser irradiation period;
θ i an irradiation deviation angle of the ith laser pulse in the laser irradiation period;
n represents the number of laser spots in the laser irradiation period;
the irradiation distance test method comprises the following specific operation steps: carrying out irradiation distance test by using a laser ranging target indicator test module, respectively using a target with 2.3m multiplied by 2.3m of front projection and a laser diffuse reflection target board with 3.0m multiplied by 3.0m of front projection as standard targets under the condition of 10km of visibility, monitoring an indicator by using a laser irradiator monitoring system, monitoring a pilot head signal by using a pilot head signal acquisition system, erecting the pilot head monitoring system at a certain distance from the standard targets, monitoring a laser pulse echo signal, measuring the distance between the standard targets and the indicator, and detecting laser pulse energy by using a comprehensive detector before and after the test;
the coding precision test method comprises the following specific operation steps: the coding precision refers to the deviation between the interval time of two adjacent laser pulses emitted by the laser target indicator and a set value; the coding precision directly relates to whether the seeker can normally receive the laser pulse, and if the coding precision exceeds the standard, the seeker cannot receive the laser pulse signal; therefore, the assessment of dynamic coding accuracy is very important; the laser irradiator irradiates the standard target plate according to three factors of near, middle and long distances, namely different horizontal distances, wherein each horizontal distance is a laser code, a laser irradiator monitoring system is used for measuring the laser emission time of a laser spot, total irradiation is carried out for 8 periods, and data statistics processing is carried out according to formulas (3) and (4);
laser coding accuracy T of jth laser irradiation period j Calculating according to a formula;
T j ＝max{|T i |}； (3)
wherein: t (T) j The laser coding precision of the jth laser irradiation period is expressed, and mu s;
T i representing the difference between the ith adjacent laser pulse emission time interval and a prescribed value in the jth laser irradiation period, μs;
coding precision T of kth laser coding k Calculating according to a formula;
T k ＝max{|T j |}； (4)
wherein: t (T) k Represents the k-th laser coding precision, mu s;
the detection and recognition distance simulation test method comprises the following specific operation steps: the thermal imaging assembly test module is utilized to carry out detection and recognition distance simulation test,
1) The target characteristics are simulated and analyzed with respect to accuracy,
the specific simulation method is that according to different target types observed by the infrared thermal imaging component, a square thermal target unit is used for simulating the shape and the size of a required target; the thermal target unit is a cuboid module with a heating function and special properties, and integrates various different test use conditions; two ways of simulating targets with different shapes exist, one way is to cover the observation targets to be simulated by a plurality of thermal target units, and then heat the thermal target units to generate simulated targets; the other way is to directly form a simulation target by using a thermal target unit and then heat the simulation target;
different observation targets frequently used in the action distance test, the simulation accuracy of the target system is mainly determined by the size and arrangement mode of the thermal target units, and the calculation formula of the target simulation accuracy is as follows:
wherein: sigma represents the target simulation accuracy;
S true sense Representing the real area of the target;
S mould Representing the area of the simulation target;
2) The environmental characteristic is simulated and analyzed with precision,
the specific practice of the three factors of the ambient temperature, the visibility and the relative humidity in the working distance test is that the test is still carried out in the field, and the three limiting factors of the ambient temperature, the visibility and the relative humidity can be met only by selecting proper weather in proper seasons;
the temperature difference between the target and the background belongs to a key factor, an accurate temperature control method is adopted to control the temperature difference between the simulated target and the background in a simulation test, a thermal target unit, a background target, a control system and a communication system are adopted to form an infrared standard target system, the center 3cm X6 cm of the infrared radiation target surface of the infrared standard target system is used as a target element area, and the temperature of the target element in the area can be controlled accurately at 0.5 ℃;
the whole target system consists of a temperature output controllable thermal target unit and a background target consistent with the infrared radiation characteristic of the target surface, wherein the thermal target unit adopts a principle of double closed-loop temperature control, and an internal closed-loop control system consists of a temperature controller, a temperature detection sensor and a target element, so that the temperature of the thermal target unit is detected and controlled, and the accurate adjustment of the temperature difference between the target and the background is realized; detecting the output condition of infrared radiation of a thermal target unit by a thermal monitoring imager, comparing the set infrared images by a main control computer, and communicating with a temperature controller by a wireless local area network system consisting of a network server and wireless routing equipment to realize the temperature control of the target unit;
when the action distance test is carried out in the field, the requirements of the ambient temperature, the visibility and the relative humidity can be met only by selecting proper weather; the simulation accuracy calculation of the temperature difference between the target and the background is shown in a formula (6),
wherein δ represents the temperature simulation accuracy;
T true sense A temperature value representing an index requirement;
T mould Representing a temperature value of the system simulation;
3) The simulation precision of the test is that,
the experimental simulation precision consists of two parts, namely target characteristic simulation precision and environment characteristic simulation precision, an equal weight principle is adopted in precision synthesis, a precision synthesis formula is shown in formula (7),
wherein epsilon represents the experimental simulation precision;
the battery pack performance test method comprises the following specific operation steps: the performance test of the storage battery is carried out by utilizing a storage battery test module, under the condition of the natural environment of a plateau, a fully charged lithium ion battery pack is used for supplying power to a laser ranging target indicator, a thermal image component of the laser ranging target indicator is started, and the refrigerating time from the starting to the normal working of the thermal image component is measured by using a timer; and when the thermal imaging component is in a working state, transmitting single-period laser pulses by using the laser ranging target indicator until the alarm unit carries out low-capacity alarm on the battery pack, and checking continuous working time and maximum laser irradiation period number.
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| CN111043907B (en) * | 2019-12-24 | 2020-12-15 | 北京富吉瑞光电科技有限公司 | Automatic shooting effect correction method based on thermal imaging sighting telescope |
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