Rapid positioning device for external field laser scattering energy test

Abstract

The invention discloses a rapid positioning device for an external field laser scattering energy test, and belongs to the technical field of laser measurement. The device comprises a laser scattering energy testing module and a measuring point adjusting module for controlling the laser scattering energy testing module to replace a testing point, and the measuring point adjusting module can adjust the three-dimensional coordinate position of the laser scattering energy testing module on the basis of determining the distance between the measuring point adjusting module and a tested target; the laser scattering energy testing module is detachably installed on the measuring point adjusting module and can test the external field laser scattering energy of the measured target. The problems that in the prior art, due to the fact that a tripod is adopted for testing, testing point position replacement accuracy is poor, consumed time is long, portability is poor, and a large amount of energy of researchers needs to be consumed in the aspects of mobility and timeliness are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of laser measurement, and in particular relates to a rapid positioning device for external field laser scattering energy testing. Background Art

[0002] The target lidar scattering cross section is a key indicator of the target laser scattering characteristics. When the target is irradiated by a laser of a certain energy under certain atmospheric transmission conditions, the energy scattered by the target is mainly related to the target's lidar scattering cross section. The law and statistical characteristics of the change of target scattering characteristics with the laser incident direction, receiving direction, target shape, roughness, material target and other characteristics are analyzed to provide verification data for theoretical model research. The typical target lidar scattering cross section test provides basic data and design basis for calculating laser indicators that meet actual combat scenarios, which has important practical application significance.

[0003] The field test of LiDAR scattering cross section is one of the main methods to obtain the scattering characteristics of typical target LiDAR. However, the previous field test used a tripod + laser energy meter probe to change the test point, which was cumbersome and inaccurate, time-consuming, and poorly portable. It required a lot of effort from researchers in terms of mobility and timeliness. In addition, the field test of LiDAR scattering cross section is easily affected by the time-varying atmospheric characteristics, and the consistency of the test results deteriorates. Summary of the invention

[0004] Technical issues to be solved:

[0005] In order to avoid the shortcomings of the prior art, the present invention provides a rapid positioning device for outdoor laser scattering energy testing. Through modular design, it is convenient for installation, disassembly and maintenance of outdoor tests, and can be adjusted in real time according to the test target position and orientation, thereby solving the problems of the prior art of using a tripod for testing, such as poor accuracy in changing test points, long time consumption, poor portability, and the need to consume a lot of energy of scientific researchers in terms of mobility and timeliness.

[0006] The technical solution of the present invention is: a rapid positioning device for outdoor laser scattering energy testing, comprising a laser scattering energy testing module and a measuring point adjustment module for controlling the replacement of test points, wherein the measuring point adjustment module can adjust the three-dimensional coordinate position of the laser scattering energy testing module on the basis of determining the distance to the target to be measured; the laser scattering energy testing module is detachably mounted on the measuring point adjustment module, and can test the outdoor laser scattering energy of the target to be measured.

[0007] A further technical solution of the present invention is: the measuring point adjustment module includes a track and a bottom movable platform slidably mounted thereon, and the bottom movable platform is connected to the laser scattering energy test module through a liftable support device; the moving position of the laser scattering energy test module in the plane is limited by the slide rail, and the height position of the laser scattering energy test module is adjusted by the liftable support device.

[0008] A further technical solution of the present invention is: the track is a semicircular track, and the distance between the measuring point and the target to be measured can be determined by designing the track radius; and angle markings are provided on the track to accurately adjust the rotation angle of the laser scattering energy test module.

[0009] A further technical solution of the present invention is: the bottom mobile platform is rollingly connected to the track through the rail wheel installed at the bottom, and is driven by a servo motor to move on the semicircular track; at the same time, a locking device is installed on the rail wheel to lock and position the bottom mobile platform that has moved into place.

[0010] A further technical solution of the present invention is: the liftable support device includes a vertical support rod, a diagonal rod and an electric push rod, the initial height of the vertical support rod is 1m, and its height is adjusted by adjusting the electric push rod, and the adjustment range is not less than 2m.

[0011] A further technical solution of the present invention is: the laser scattering energy testing module includes a carrying platform and an alignment device installed thereon, a laser scattering energy testing device and an adjustment mechanism, the carrying platform is installed on a liftable support device, and the adjustment mechanism is used to adjust the alignment device and the laser scattering energy testing device in pitch and azimuth.

[0012] A further technical solution of the present invention is that the alignment device comprises a high-precision laser pointer, the beam divergence angle of which is better than 0.5 mrad and can work continuously for not less than 6 hours.

[0013] A further technical solution of the present invention is: the laser scattering energy testing device is a laser energy meter probe or a laser power meter, which is used to measure the laser scattering energy.

[0014] A rapid positioning method for outdoor laser scattering energy testing, the specific steps are as follows:

[0015] Lay the measuring point moving track; with the measured target as the center, lay a semicircular arc track in the opposite direction. The semicircular arc track is composed of two 45° arc tracks, and its surface is engraved with a minimum scale of 1°;

[0016] Assemble the measuring equipment; install the laser energy meter probe and the high-precision laser pointer on the carrying platform through the adjustment mechanism, and then install the carrying platform on the bottom moving platform through the lifting support device;

[0017] Position the test equipment; install the assembled measuring equipment on the slide rail through the bottom rail wheel and position it through the locking device;

[0018] Turn on the high-precision laser pointer, and adjust the height, azimuth, and pitch of the carrying platform according to the auxiliary guidance of the high-precision laser pointer so that the laser energy meter probe is aimed at the target to be measured;

[0019] The laser is controlled to radiate laser of a specified wavelength, and the laser energy meter probe is used to measure the scattered laser energy of the target for multiple times to obtain the average value. After the measurement is completed, it moves along the semicircular track to the next angle test point and continues the test until the entire test is completed.

[0020] A rapid positioning method for outdoor laser scattering energy testing, the specific steps are as follows:

[0021] Lay the measuring point moving track; with the measured target as the center, lay a semicircular arc track in the opposite direction. The semicircular arc track is composed of two 45° arc tracks, and its surface is engraved with a minimum scale of 1°;

[0022] Assemble multiple measuring devices; install the laser energy meter probe and high-precision laser pointer on the carrying platform through the adjustment mechanism, and then install the carrying platform on the bottom moving platform through the lifting support device;

[0023] Position multiple test equipment; install each assembled measuring equipment on the slide rail through the bottom rail wheel and position it through the locking device;

[0024] Turn on the high-precision laser pointer of each measuring device, and adjust the height, azimuth, and pitch attitude of the corresponding carrying platform according to the auxiliary guidance of the high-precision laser pointer, so that the probes of each laser energy meter are respectively aimed at the measured target;

[0025] The laser is controlled to radiate laser of a specified wavelength, and each laser energy meter probe is used to simultaneously measure the laser energy scattered by the target to obtain the average value. After the measurement is completed, it moves along the semicircular track to the next angle test point and continues the test until the entire test is completed.

[0026] Beneficial Effects

[0027] The beneficial effects of the present invention are as follows: the present invention aims to establish a rapid positioning device for outdoor laser scattering energy testing, which can quickly obtain laser scattering energy in the outdoor field and efficiently complete target LRCS characteristic tests at different angles. The test device is highly portable and easy to disassemble and assemble. It can quickly obtain laser scattering energy in the outdoor field, and has important practical value and significance for improving the efficiency of laser radar scattering cross section (LRCS) testing.

[0028] The present invention has a modular structure, is highly portable, and is easy to disassemble and assemble. The position and posture of the measuring point are limited once by the track, and repeated debugging is not required, which reduces the tedious operations in the test and can effectively improve the measurement accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of a rapid positioning device for outdoor laser scattering energy testing according to an embodiment of the present invention;

[0030] Figure 2 A test schematic diagram of a first method for rapid positioning of an outdoor laser scattering energy test according to an embodiment of the present invention;

[0031] Figure 3 This is a test schematic diagram of a second rapid positioning method for an out-of-field laser scattering energy test according to an embodiment of the present invention.

[0032] Explanation of the reference numerals in the accompanying drawings: 1. semicircular track; 2. positioning and locking device; 3. bottom moving platform; 4. lifting and lowering support device; 5. high-precision laser pointer; 6. laser energy meter probe; 7. adjustment mechanism; 8. sling; 9. target to be measured; 10. light spot monitor; 11. laser; 12. container vehicle; 13. atmospheric transmittance test equipment; 14. rapid positioning test device. DETAILED DESCRIPTION

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

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] Based on the previous field tests, the test points were replaced by a tripod + laser energy meter probe, which is cumbersome, has poor accuracy, is time-consuming, and has poor portability, and requires a lot of effort from scientific researchers in terms of mobility and timeliness; and the field test of the laser radar scattering cross section is easily affected by the time-varying atmospheric characteristics and the consistency of the test results deteriorates. The present invention provides a rapid positioning device for field laser scattering energy testing, comprising a laser scattering energy testing module and a measuring point adjustment module for controlling the replacement of the test points, wherein the measuring point adjustment module can adjust the three-dimensional coordinate position of the laser scattering energy testing module based on the distance to the target to be measured; the laser scattering energy testing module is detachably mounted on the measuring point adjustment module, and can test the field laser scattering energy of the target to be measured.

[0036] Specifically, the measuring point adjustment module includes a track and a bottom movable platform slidably mounted thereon, and the bottom movable platform is connected to the laser scattering energy test module through a liftable support device; the moving position of the laser scattering energy test module in the plane is limited by the slide rail, and the height position of the laser scattering energy test module is adjusted by the liftable support device.

[0037] Specifically, the track is a semicircular track. By designing the track radius, the distance between the measuring point and the target to be measured can be determined; and angle markings are provided on the track to accurately adjust the rotation angle of the laser scattering energy test module.

[0038] Specifically, the bottom mobile platform is rollingly connected to the track through the rail wheel installed at the bottom, and is driven by a servo motor to move on the semicircular track; at the same time, a locking device is installed on the rail wheel to lock and position the bottom mobile platform that has moved into place.

[0039] Specifically, the liftable support device includes a vertical support rod, a diagonal rod and an electric push rod. The initial height of the vertical support rod is 1m, and its height is adjusted by adjusting the electric push rod, and the adjustment range is not less than 2m.

[0040] Specifically, the laser scattering energy test module includes a carrying platform and an alignment device installed thereon, a laser scattering energy test device and an adjustment mechanism. The carrying platform is installed on a liftable support device, and the adjustment mechanism is used to adjust the alignment device and the laser scattering energy test device in pitch and azimuth.

[0041] Specifically, the alignment device includes a high-precision laser pointer, the beam divergence angle of which is better than 0.5 mrad and can work continuously for not less than 6 hours.

[0042] Specifically, the laser scattering energy testing device is a laser energy meter probe or a laser power meter, which is used to measure the laser scattering energy.

[0043] The above technical solution is further described below in conjunction with the accompanying drawings:

[0044] Reference Figure 1 As shown, a rapid positioning device for an outdoor laser scattering energy test in this embodiment includes a semicircular track 1, a positioning locking device 2, a bottom moving platform 3, a liftable support device 4, a high-precision laser pointer 5, an energy meter probe carrying platform 6, and an adjustment mechanism 7; wherein the positioning locking device 2, the bottom moving platform 3, the liftable support device 4, the high-precision laser pointer 5, the laser energy meter probe 6, and the adjustment mechanism 7 constitute a rapid positioning test device 14. The high-precision laser pointer 5 and the laser energy meter probe 6 are mounted on the carrying platform through the adjustment mechanism 7, and the carrying platform is mounted on the bottom moving platform 3 through the liftable support device 4. The bottom of the bottom moving platform 3 is equipped with a rail wheel and a locking device 2, which is mounted on the track 1 through the rail wheel, and the bottom moving platform 3 is driven by a servo motor to slide on the track 1.

[0045] The liftable support device is composed of a vertical support rod, a diagonal rod and an electric push rod. The initial height of the vertical support rod is 1m, and its height can be adjusted by the electric push rod. The height adjustment range is not less than 2m.

[0046] The beam divergence angle of the high-precision laser pointer is better than 0.5 mrad and can work continuously for no less than 6 hours.

[0047] The semicircular arc track is formed by splicing two 45° circular arc tracks, and has an angle scale on its surface, with a minimum scale value of 1°, which can be used to perform angle positioning on the target to be measured.

[0048] The servo motor can be powered by a lithium battery. When the battery is fully charged, the rapid positioning device can be guaranteed to run continuously for no less than 6 hours.

[0049] Embodiment 1:

[0050] Reference Figure 2 As shown, the specific steps of measuring LRCS using the outdoor laser scattering energy test rapid positioning device are as follows: select an outdoor test site with a wide field of view, lay the semicircular track 1 in front of the target 9 to be measured as the center of the circle, install and fix the high-precision laser pointer 5 and the laser energy meter probe 6 on the carrying platform, and correctly install and combine with the bottom mobile platform 3 and the liftable support device 4. Finally, install the combined rapid positioning test device 14 to the designated test point of the semicircular track, use the positioning locking device 2 to lock it on the semicircular track 1, adjust the support rod of the liftable support device 4 to raise it to the same height as the target to be measured, turn on the high-precision laser pointer 5 on the carrying platform, and adjust the azimuth and pitch of the carrying platform according to the auxiliary guidance of the laser pointer to align the laser energy meter probe 6 with the target 9 to be measured.

[0051] The laser 11 is controlled to radiate laser light of a specified wavelength, and the laser energy meter probe 6 is used to measure the average laser energy scattered by the target 9. After the measurement is completed, the rapid positioning test device 14 is controlled to move along the semicircular track to the next angle test point, and the test is continued until the entire test is completed.

[0052] Embodiment 2:

[0053] Reference Figure 3 As shown, the specific steps of measuring LRCS using the outdoor laser scattering energy test rapid positioning device are as follows: select an outdoor test site with a wide field of view, lay the semicircular track 1 in front of the target 9 to be measured as the center of the circle, install and fix the high-precision laser pointer 5 and the laser energy meter probe 6 on the carrying platform, and correctly install and combine with the bottom mobile platform 3 and the liftable support device 4 to form three rapid positioning test devices 14. Finally, the combined rapid positioning test device 14 is respectively installed on the three test points specified by the semicircular track, and is locked on the semicircular track by using the locking device 2, and the support rod of the liftable support device 4 is adjusted to rise to the same height as the target 9 to be measured, and the high-precision laser pointer 5 on the carrying platform is turned on. According to the auxiliary guidance of the laser pointer 5, the azimuth and pitch of the carrying platform are adjusted to make the laser energy meter probe 6 aim at the target 9 to be measured.

[0054] The laser 11 is controlled to radiate laser of a specified wavelength, and the laser energy meter probe 6 is used to measure the average laser energy scattered by the target at the three test points. After the measurement is completed, the rapid positioning device is controlled to move along the semicircular track to the next three angle test points, and the test is continued until the entire test is completed.

[0055] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary 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 intent of the present invention.

Claims

1. A rapid positioning device for outdoor laser scattering energy testing, characterized in that: It includes a laser scattering energy test module and a measuring point adjustment module for controlling the replacement of the test points. The measuring point adjustment module can adjust the three-dimensional coordinate position of the laser scattering energy test module based on the distance to the target to be measured. The laser scattering energy test module is detachably mounted on the measuring point adjustment module and can test the external field laser scattering energy of the target to be measured.

2. According to claim 1, a rapid positioning device for outdoor laser scattering energy testing is characterized in that: The measuring point adjustment module includes a track and a bottom mobile platform slidably mounted thereon, and the bottom mobile platform is connected to the laser scattering energy test module through a liftable support device; the moving position of the laser scattering energy test module in the plane is limited by the slide rail, and the height position of the laser scattering energy test module is adjusted by the liftable support device.

3. According to claim 2, a rapid positioning device for external field laser scattering energy testing is characterized in that: The track is a semicircular track. By designing the track radius, the distance between the measuring point and the measured target can be determined; and angle markings are arranged on the track to accurately adjust the rotation angle of the laser scattering energy test module.

4. According to claim 3, a rapid positioning device for external field laser scattering energy testing is characterized in that: The bottom moving platform is rollingly connected to the track through the rail wheel installed at the bottom, and is driven by a servo motor to move on the semicircular track; at the same time, a locking device is installed on the rail wheel to lock and position the bottom moving platform that has moved into place.

5. According to claim 4, a rapid positioning device for external field laser scattering energy testing is characterized in that: The liftable support device comprises a vertical support rod, a diagonal rod and an electric push rod. The initial height of the vertical support rod is 1m, and its height is adjusted by adjusting the electric push rod, and the adjustment range is not less than 2m.

6. According to claim 5, a rapid positioning device for outdoor laser scattering energy testing is characterized in that: The laser scattering energy test module includes a carrying platform and an alignment device installed thereon, a laser scattering energy test device and an adjustment mechanism. The carrying platform is installed on a liftable support device, and the adjustment mechanism is used to adjust the alignment device and the laser scattering energy test device in pitch and azimuth.

7. The rapid positioning device for outdoor laser scattering energy testing according to claim 6, characterized in that: The alignment device includes a high-precision laser pointer, the beam divergence angle of which is better than 0.5 mrad and can work continuously for not less than 6 hours.

8. The rapid positioning device for outdoor laser scattering energy testing according to claim 7, characterized in that: The laser scattering energy testing device is a laser energy meter probe or a laser power meter, which is used to measure the laser scattering energy.

9. A method for rapid positioning of an external field laser scattering energy test, implemented based on the rapid positioning device for external field laser scattering energy test according to any one of claims 1 to 8; characterized in that The specific steps are as follows: Lay the measuring point moving track; with the measured target as the center, lay a semicircular arc track in the opposite direction. The semicircular arc track is composed of two 45° arc tracks, and its surface is engraved with a minimum scale of 1°; Assemble the measuring equipment; install the laser energy meter probe and the high-precision laser pointer on the carrying platform through the adjustment mechanism, and then install the carrying platform on the bottom moving platform through the lifting support device; Position the test equipment; install the assembled measuring equipment on the slide rail through the bottom rail wheel and position it through the locking device; Turn on the high-precision laser pointer, and adjust the height, azimuth, and pitch of the carrying platform according to the auxiliary guidance of the high-precision laser pointer so that the laser energy meter probe is aimed at the target to be measured; The laser is controlled to radiate laser of a specified wavelength, and the laser energy meter probe is used to measure the scattered laser energy of the target for multiple times to obtain the average value. After the measurement is completed, it moves along the semicircular track to the next angle test point and continues the test until the entire test is completed.

10. A method for rapid positioning of an external field laser scattering energy test, implemented based on the rapid positioning device for external field laser scattering energy test according to any one of claims 1 to 8; characterized in that The specific steps are as follows: Lay the measuring point moving track; with the measured target as the center, lay a semicircular arc track in the opposite direction. The semicircular arc track is composed of two 45° arc tracks, and its surface is engraved with a minimum scale of 1°; Assemble multiple measuring devices; install the laser energy meter probe and high-precision laser pointer on the carrying platform through the adjustment mechanism, and then install the carrying platform on the bottom moving platform through the lifting support device; Position multiple test equipment; install each assembled measuring equipment on the slide rail through the bottom rail wheel and position it through the locking device; Turn on the high-precision laser pointer of each measuring device, and adjust the height, azimuth, and pitch attitude of the corresponding carrying platform according to the auxiliary guidance of the high-precision laser pointer, so that the probes of each laser energy meter are respectively aimed at the measured target; The laser is controlled to radiate laser of a specified wavelength, and each laser energy meter probe is used to simultaneously measure the laser energy scattered by the target to obtain the average value. After the measurement is completed, it moves along the semicircular track to the next angle test point and continues the test until the entire test is completed.

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