A test device for a ground laser communication terminal
By designing a circulating salt spray component and a quantitative feeding component, the problems of salt solution concentration differences and wastewater generation in salt spray testing of ground laser communication terminals were solved, realizing the recovery and restoration of salt solution and reducing testing costs and difficulties.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BLUE STAR OPTICAL (SHANGHAI) AEROSPACE TECH CO LTD
- Filing Date
- 2026-06-03
- Publication Date
- 2026-07-03
AI Technical Summary
In salt spray testing of ground-based laser communication terminals, large differences in salt solution concentration affect test accuracy, and the used salt solution cannot be recycled and reused, resulting in large consumption and wastewater generation, increasing test costs and difficulty.
Design a test device for a ground-based laser communication terminal, comprising a circulating salt spray component and a quantitative feeding component to realize the recovery and restoration of salt solution, and to accelerate the dissolution rate of sodium chloride particles by an accelerated dissolution component to maintain a stable salt solution concentration.
This avoids the impact of salt solution concentration differences on test accuracy, reduces salt solution usage and wastewater production, and lowers test costs and difficulty.
Smart Images
Figure CN122329967A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of communication terminal testing technology, and in particular to a testing device for a terrestrial laser communication terminal. Background Technology
[0002] A terrestrial laser communication terminal is a precision optoelectronic device that uses a laser beam as a carrier to achieve high-speed, wireless, point-to-point data transmission between ground-to-ground or between ground-to-air / space-based platforms (satellites, drones). Depending on the installation area, terrestrial laser communication terminals used in coastal or island areas need to undergo salt spray testing. As a precision optoelectronic and mechatronic integrated equipment, salt spray will directly attack its three core systems of optics, electrical and mechanical components, leading to performance degradation, link interruption or structural failure. Therefore, salt spray testing is a mandatory and critical step in verifying its environmental adaptability, reliability and durability.
[0003] During the salt spray test of terrestrial laser communication terminals, white salt stains will form on the surface of the terminal. At this time, the salt solution concentration will gradually decrease. Therefore, in order to avoid affecting the test accuracy due to excessive concentration difference, the sprayed salt solution usually cannot be recycled and reused. However, due to the long test time (usually 24h / 48h / 72h according to design requirements), a large amount of salt solution needs to be consumed, and a large amount of wastewater is generated, which increases the test difficulty and test cost.
[0004] Therefore, it is necessary to invent a testing device for a terrestrial laser communication terminal to solve the above problems. Summary of the Invention
[0005] The purpose of this invention is to provide a testing device for terrestrial laser communication terminals, which can avoid the impact of excessive concentration differences in salt solutions on testing accuracy, and can also restore the salt solution after use to reduce the amount of salt solution used during testing, thereby reducing wastewater production, lowering testing costs and difficulty. This addresses the problem mentioned in the background art that, in order to avoid the impact of excessive concentration differences on testing accuracy, the sprayed salt solution is usually not recyclable, but due to the long testing time, a large amount of salt solution is required, and a large amount of wastewater is generated, increasing testing difficulty and cost.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a testing device for a terrestrial laser communication terminal, comprising a housing assembly, a terminal mounting assembly disposed in the middle of the inner cavity of the housing assembly, a circulating salt spray assembly disposed at the bottom of the inner cavity of the housing assembly, an accelerated dissolution assembly disposed inside the circulating salt spray assembly, a quantitative feeding assembly disposed at the rear side of the housing assembly and communicating with the accelerated dissolution assembly, the accelerated dissolution assembly comprising a guide hood fixedly connected to the bottom end of a storage hopper, the front end of the guide hood extending into the interior of a salt solution recovery tank and fixedly connected to a piston cylinder, a barrier net fixedly installed at the bottom end of the piston cylinder, a fixed frame fixedly disposed at the top end of the piston cylinder, a lifting shaft slidably disposed vertically along the inner side of the fixed frame via a linear bearing, a piston plate fixedly connected to the bottom end of the lifting shaft, a drive frame fixedly connected to the top end of the lifting shaft, a drive shaft disposed in the middle of the inner side of the drive frame, and a rotating disk fixedly sleeved on the outer front end of the drive shaft fixedly connected to the rear end of the drive shaft.
[0007] Preferably, the housing assembly includes a housing body, and an avoidance passage is formed at the bottom front of the housing body.
[0008] Preferably, the top front of the outer casing has a pick-up and put-out opening, and two symmetrical sealing doors are rotatably nested inside the pick-up and put-out opening via ball bearings.
[0009] Preferably, the terminal mounting assembly includes a rotating shaft that is rotatably nested in the middle of the inner cavity of the outer shell body via a ball bearing, a mounting platform is fixedly sleeved on the middle of the outer side of the rotating shaft, and a driven gear is fixedly sleeved on the right end of the outer side of the rotating shaft.
[0010] Preferably, the terminal mounting assembly further includes a guide rail fixedly mounted on the right side of the housing body, a slider slidably mounted on the outer side of the guide rail via a linear bearing, a rack fixedly mounted on the top of the slider to mesh with a driven gear, a transmission arm fixedly connected to the bottom of the slider, and a reciprocating nut fixedly connected to the rear end of the transmission arm.
[0011] Preferably, the circulating salt spray assembly includes a water tank fixedly disposed at the bottom of the inner cavity of the outer shell and extending to the front of the outer shell through a clearance channel. An overflow baffle is fixedly disposed on the inner side of the water tank, and the overflow baffle divides the inner cavity of the water tank into a salt solution storage pool and a salt solution recovery pool distributed in the front-back direction. A shielding cover for shielding the salt solution storage pool is fixedly disposed on the top of the water tank.
[0012] Preferably, a delivery pump is fixedly installed inside the water tank, and a connecting pipe A is fixedly connected to the output end of the delivery pump. A sealing cover is fixedly sleeved on the output end of the connecting pipe A. A connecting pipe B is fixedly inserted through the left side of the sealing cover. A dispersing pipe is fixedly connected to the output end of the connecting pipe B. The dispersing pipe is fixedly nested in the top of the inner cavity of the outer shell. Multiple nozzles are fixedly installed on both sides of the dispersing pipe.
[0013] Preferably, the quantitative feeding assembly includes a storage hopper fixedly disposed on the rear side of the outer shell body. A drive shaft is rotatably nested in the middle of the storage hopper via a ball bearing. An impeller and a feeding cylinder are fixedly sleeved on the outer side of the drive shaft from back to front. The feeding cylinder is rotatably disposed inside the storage hopper. A quantitative groove is opened on the top of the feeding cylinder.
[0014] Preferably, the impeller is located inside the sealing cover, and the sealing cover is fixedly installed on the rear side of the storage hopper.
[0015] Preferably, the transmission shaft has a reciprocating thread at the middle of its outer side, and the reciprocating nut is sleeved at the middle of the middle of the outer side of the transmission shaft.
[0016] The technical effects and advantages of this invention are as follows:
[0017] This invention utilizes a circulating salt spray assembly to recover the used salt solution during salt spray testing. A quantitative feeding assembly then adds a quantitative amount of sodium chloride particles to the recovered salt solution to restore its original state. Furthermore, during this process, the quantitative feeding assembly also drives an accelerated dissolution assembly to speed up the dissolution of the sodium chloride particles. Compared to existing technologies, this invention avoids significant differences in salt solution concentration that could affect testing accuracy, while simultaneously restoring the used salt solution, reducing the amount of salt solution used during testing, decreasing wastewater production, and lowering testing costs and complexity. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the housing assembly structure of the present invention; Figure 3 This is a schematic diagram of the terminal mounting component structure of the present invention; Figure 4 This is a schematic diagram of the circulating salt spray assembly structure of the present invention; Figure 5 This is a schematic diagram of the accelerated dissolution component structure of the present invention; Figure 6 This is a schematic diagram of the quantitative feeding component structure of the present invention.
[0019] In the diagram: 1. Housing assembly; 11. Housing body; 12. Clearance passage; 13. Pick-up and drop-off opening; 14. Sealing door; 2. Terminal mounting assembly; 21. Rotating shaft; 22. Mounting platform; 23. Driven gear; 24. Guide rail; 25. Slider; 26. Rack; 27. Drive arm; 28. Reciprocating nut; 3. Circulating salt spray assembly; 31. Water tank; 32. Overflow baffle; 33. Shielding cover; 34. Transfer pump; 35. Connecting... 36. Connector A; 37. Sealing cover; 38. Connecting pipe B; 39. Dispersion pipe; 4. Nozzle; 5. Accelerating dissolution assembly; 6. Flow guide; 7. Piston cylinder; 8. Barrier net; 9. Fixing frame; 10. Lifting shaft; 11. Piston plate; 12. Drive frame; 23. Drive shaft; 34. Rotary disc; 55. Quantitative feeding assembly; 66. Storage hopper; 77. Transmission shaft; 88. Impeller; 99. Feeding cylinder; 100. Quantitative trough. Detailed Implementation
[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0021] This invention provides, for example Figures 1-6 The test device for a ground laser communication terminal shown includes a housing assembly 1, a terminal mounting assembly 2 disposed in the middle of the inner cavity of the housing assembly 1, a circulating salt spray assembly 3 disposed at the bottom of the inner cavity of the housing assembly 1, an accelerated dissolution assembly 4 disposed inside the circulating salt spray assembly 3, and a quantitative feeding assembly 5 disposed on the rear side of the housing assembly 1 and connected to the accelerated dissolution assembly 4.
[0022] like Figure 2 As shown, the outer casing assembly 1 includes an outer casing body 11 made of 304 stainless steel, the inner wall of which is provided with an epoxy resin anti-corrosion coating, which is resistant to salt spray and corrosion, ensuring that it will not rust after long-term use. A clearance passage 12 is opened at the bottom front of the outer casing body 11, and a pick-up and put-out opening 13 is opened at the top front of the outer casing body 11. Two mutually symmetrical sealing doors 14 are provided inside the pick-up and put-out opening 13 through a ball bearing for rotation and nesting.
[0023] like Figure 3As shown, the terminal installation assembly 2 includes a rotating shaft 21 nested in the middle of the inner cavity of the outer shell 11 via a ball bearing. A hard aluminum alloy mounting platform 22 is fixedly sleeved on the middle of the outer side of the rotating shaft 21. The platform is anodized, making it lightweight, strong, and non-stick to salt, thus reducing the rate at which the salt solution concentration decreases. A driven gear 23 is fixedly sleeved on the right side of the outer side of the rotating shaft 21. The terminal installation assembly 2 also includes a guide rail 24 fixedly mounted on the right side of the outer shell 11. A slider 25 is slidably mounted on the outer side of the guide rail 24 via a linear bearing. A rack 26 that meshes with the driven gear 23 is fixedly mounted on the top of the slider 25. A transmission arm 27 is fixedly connected to the bottom of the slider 25. A reciprocating nut 28 is fixedly connected to the rear end of the transmission arm 27. The reciprocating nut 28 is sleeved on the middle of the outer side of the transmission shaft 52.
[0024] By setting up the above structure, the reciprocating nut 28 can move back and forth repeatedly when the drive shaft 52 rotates. When the reciprocating nut 28 moves, it drives the slider 25, which is guided by the guide rail 24, to move back and forth repeatedly through the drive arm 27. The slider 25 then drives the rack 26 to move back and forth repeatedly. The rack 26, through the driven gear 23 and the rotating shaft 21, drives the mounting platform 22 to rotate clockwise and counterclockwise repeatedly (rotation angle is 15° to 30°). This can prevent water from accumulating on the surface of the mounting platform 22 and allow the salt solution falling on the terminal surface to flow down naturally.
[0025] like Figure 4 As shown, the circulating salt spray assembly 3 includes a water tank 31 fixedly installed at the bottom of the inner cavity of the outer shell 11 and extending to the front of the outer shell 11 through the clearance channel 12. An overflow baffle 32 is fixedly installed inside the water tank 31. Both the water tank 31 and the overflow baffle 32 are made of PPR engineering plastic, which is resistant to acid and alkali salt spray, corrosion-resistant, and easy to clean. The overflow baffle 32 divides the inner cavity of the water tank 31 into a salt solution storage pool and a salt solution recovery pool distributed in the front-to-back direction. A shielding cover 33 for shielding the salt solution storage pool is fixedly installed on the top of the water tank 31. It is made of PVC anti-corrosion board. The interior of the water tank 31... A conveying pump 34 is fixedly installed. A connecting pipe A35 is fixedly connected to the output end of the conveying pump 34. A sealing cover 36 is fixedly sleeved at the output end of the connecting pipe A35. The sealing cover 36 is fixedly installed on the rear side of the storage hopper 51. A connecting pipe B37 is fixedly installed through the left side of the sealing cover 36. A dispersing pipe 38 is fixedly connected to the output end of the connecting pipe B37. The dispersing pipe 38 is fixedly nested in the top of the inner cavity of the outer shell 11. Multiple nozzles 39 are fixedly installed on both sides of the dispersing pipe 38. These are ceramic nozzles, which are wear-resistant, have uniform atomization, good salt spray particle size consistency, and high testing accuracy.
[0026] By setting up the above structure, the salt solution inside the salt solution storage tank can be continuously drawn after the transfer pump 34 is started. The salt solution enters the sealed cover 36 through the connecting pipe A35, and then enters the dispersion tube 38 through the connecting pipe B37. Finally, it is sprayed out by multiple nozzles 39 on both sides of the dispersion tube 38, thereby forming a salt mist in the upper part of the inner cavity of the outer shell 11 for testing the terminal under test. The salt mist continuously falls to form a salt solution. Due to the obstruction of the shielding cover 33, all the salt solution flows into the salt solution recovery tank and is collected. As the liquid level in the salt solution recovery tank continues to rise.
[0027] like Figure 5 As shown, the accelerated dissolution component 4 includes a guide shroud 41 fixedly connected to the bottom of the storage hopper 51. The guide shroud is made of ABS engineering plastic with a smooth inner wall that prevents salt particles from adhering, ensuring smooth material flow. The front end of the guide shroud 41 extends into the salt solution recovery tank and is fixedly connected to a stainless steel piston cylinder 42. A baffle net 43, also made of stainless steel, is fixedly installed at the bottom of the piston cylinder 42. This net is corrosion-resistant, has precise pore size, and blocks salt particles without affecting solution flow. It is used to block sodium chloride particles, preventing them from being directly added to the salt solution recovery tank and clogging the nozzle 39. A fixed frame 44 is fixedly installed at the top of the plug cylinder 42. A lifting shaft 45 is slidably installed in the vertical direction on the inner side of the fixed frame 44 via a linear bearing. A piston plate 46 is fixedly connected to the bottom end of the lifting shaft 45. The piston plate 46 is composed of a rigid plastic skeleton and a fluororubber coating layer covering the rigid plastic skeleton. It is well sealed, resistant to salt corrosion, and leak-free during reciprocating motion. A drive frame 47 is fixedly connected to the top of the lifting shaft 45. A drive shaft 48 is installed in the middle of the inner side of the drive frame 47. A rotating disk 49 is fixedly connected to the rear end of the drive shaft 48 and is fixedly sleeved on the front end of the outer side of the transmission shaft 52.
[0028] By setting the above structure, the sodium chloride particles output into the guide shroud 41 can slide down the guide shroud 41 into the piston cylinder 42. When the subsequent drive shaft 52 drives the rotating disk 49 to rotate synchronously, the rotating disk 49 drives the drive frame 47 to repeatedly rise and fall through the drive shaft 48. During the repeated rising and falling of the drive frame 47, the piston plate 46 is driven to repeatedly rise and fall inside the piston cylinder 42 through the lifting shaft 45. When the piston plate 46 falls, it pushes the salt solution inside the piston cylinder 42 through the barrier net 43 for rapid output. During this process, the sodium chloride particles inside the piston cylinder 42 are quickly flushed and dissolved by the salt solution. When the piston plate 46 rises, it draws the salt solution into the piston cylinder 42, thereby realizing the secondary flushing of the sodium chloride particles and further improving the dissolution rate. As the sodium chloride particles continue to dissolve, the salt solution concentration in the salt solution recovery tank gradually recovers, making it convenient for subsequent reuse.
[0029] like Figure 6As shown, the quantitative feeding assembly 5 includes a storage hopper 51 fixedly installed on the rear side of the outer shell 11. A drive shaft 52 is rotatably nested in the middle of the storage hopper 51 via a ball bearing. A reciprocating thread is opened in the middle of the outer side of the drive shaft 52. An impeller 53 and a feeding cylinder 54 are fixedly sleeved on the outer side of the drive shaft 52 from back to front. The impeller 53 is located inside the sealing cover 36 and is made of nylon reinforced plastic, which is resistant to water flow impact, rotates lightly, and can rotate stably by being driven by salt solution. The feeding cylinder 54 is rotatably installed inside the storage hopper 51 and is made of rigid PVC, which is wear-resistant and dimensionally stable. A quantitative groove 55 is opened on the top of the feeding cylinder 54.
[0030] By setting up the above structure, when the salt solution flows through the inside of the sealing cover 36, the impeller 53 rotates continuously under the push of the salt solution. When the impeller 53 rotates, it drives the drive shaft 52 to rotate synchronously. When the drive shaft 52 rotates, it drives the feed cylinder 54 to rotate continuously inside the storage hopper 51. During this process, the sodium chloride particles inside the storage hopper 51 continuously enter the metering tank 55, and then are output from the bottom opening of the storage hopper 51 to the inside of the guide cover 41.
[0031] The specific working process of this invention is as follows: In actual use, the prepared salt solution is added to the salt solution storage tank, and the sodium chloride particles to be used are added into the storage hopper 51 through the top opening of the storage hopper 51. Finally, the terminal to be tested is fixed on the top of the mounting platform 22 and the two sealing doors 14 are closed. The delivery pump 34 is started, and the delivery pump 34 continuously draws the salt solution inside the salt solution storage tank. The salt solution enters the sealed cover 36 through the connecting pipe A35, and then enters the dispersion tube 38 through the connecting pipe B37. Finally, it is sprayed out by multiple nozzles 39 on both sides of the dispersion tube 38, thereby forming a salt mist in the upper part of the inner cavity of the outer shell 11 for testing the terminal under test. As the salt spray falls continuously, it forms a salt solution. Due to the obstruction of the cover plate 33, the salt solution flows into the salt solution recovery tank and is collected. As the liquid level in the salt solution recovery tank continues to rise, the salt solution in the salt solution recovery tank enters the piston cylinder 42 through the barrier net 43. When the salt solution flows through the inside of the sealing cover 36, the impeller 53 rotates continuously under the push of the salt solution. When the impeller 53 rotates, it drives the drive shaft 52 to rotate synchronously. When the drive shaft 52 rotates, it drives the feed cylinder 54 to rotate continuously inside the storage hopper 51. During this process, the sodium chloride particles inside the storage hopper 51 continuously enter the metering tank 55, and then are output from the bottom opening of the storage hopper 51 to the inside of the guide cover 41. The sodium chloride particles output to the inside of the guide cover 41 slide down along the guide cover 41 into the piston cylinder 42. When the drive shaft 52 rotates, it drives the rotating disk 49 to rotate synchronously. The rotating disk 49 then drives the drive frame 47 to repeatedly rise and fall through the drive shaft 48. During the repeated rising and falling of the drive frame 47, the piston plate 46 is driven to repeatedly rise and fall inside the piston cylinder 42 through the lifting shaft 45. When the piston plate 46 falls, it pushes the salt solution inside the piston cylinder 42 through the barrier net 43 for rapid output. During this process, the sodium chloride particles inside the piston cylinder 42 are quickly flushed and dissolved by the salt solution. When the piston plate 46 rises, it draws the salt solution into the piston cylinder 42, thereby achieving secondary flushing of the sodium chloride particles and further improving the dissolution rate. As the sodium chloride particles continue to dissolve, the salt solution concentration in the salt solution recovery tank gradually recovers. Meanwhile, when the drive shaft 52 rotates, it drives the reciprocating nut 28 to move back and forth repeatedly. When the reciprocating nut 28 moves, it drives the slider 25, which is guided by the guide rail 24, to move back and forth repeatedly through the drive arm 27. The slider 25 then drives the rack 26 to move back and forth repeatedly. The rack 26, through the driven gear 23 and the rotating shaft 21, drives the mounting platform 22 to rotate clockwise and counterclockwise repeatedly (rotation angle is 15° to 30°). This can prevent water from accumulating on the surface of the mounting platform 22 and allow the salt solution falling on the terminal surface to flow down naturally. As the liquid level in the salt solution recovery tank continues to rise, when the liquid level in the salt solution recovery tank is greater than the height of the overflow baffle 32, the salt solution in the salt solution recovery tank continuously crosses the overflow baffle 32 and flows into the salt solution storage tank, thereby replenishing the salt solution in the salt solution storage tank. After the test is completed, the delivery pump 34 is stopped, and then the terminal is removed from the top of the mounting platform 22. After rinsing off the salt residue on the surface of the terminal with deionized water, the terminal is dried at low temperature. The appearance, structure, optical and ATP performance, communication performance and electrical performance of the terminal are checked in turn to confirm whether they are qualified. If they are qualified, the salt spray test result is qualified. If one or more of them are unqualified, the salt spray test result is unqualified.
[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A testing device for a terrestrial laser communication terminal, comprising a housing assembly (1), characterized in that: A terminal installation component (2) is provided in the middle of the inner cavity of the outer shell assembly (1). A circulating salt spray component (3) is provided at the bottom of the inner cavity of the outer shell assembly (1). An accelerated dissolution component (4) is provided inside the circulating salt spray component (3). A quantitative feeding component (5) communicating with the accelerated dissolution component (4) is provided on the rear side of the outer shell assembly (1). The accelerated dissolution component (4) includes a flow guide (41) fixedly connected to the bottom end of the storage hopper (51). The front end of the flow guide (41) extends into the salt solution recovery tank and is fixedly connected to a piston cylinder (42). A barrier net (43) is fixedly installed at the bottom of the cylinder (42). A fixed frame (44) is fixedly installed at the top of the piston cylinder (42). A lifting shaft (45) is slidably installed in the vertical direction on the inner side of the fixed frame (44) via a linear bearing. A piston plate (46) is fixedly connected at the bottom of the lifting shaft (45). A drive frame (47) is fixedly connected at the top of the lifting shaft (45). A drive shaft (48) is installed in the middle of the inner side of the drive frame (47). A rotating disk (49) is fixedly connected to the rear end of the drive shaft (48) and is fixedly sleeved at the front end of the outer side of the transmission shaft (52).
2. The testing device for a terrestrial laser communication terminal according to claim 1, characterized in that: The outer casing assembly (1) includes an outer casing body (11), with a clearance passage (12) opened at the bottom front of the outer casing body (11).
3. The testing device for a terrestrial laser communication terminal according to claim 2, characterized in that: The outer shell body (11) has a pick-up and put-out opening (13) on the top front side, and two mutually symmetrical sealing doors (14) are provided inside the pick-up and put-out opening (13) through a ball bearing.
4. The testing device for a terrestrial laser communication terminal according to claim 3, characterized in that: The terminal mounting assembly (2) includes a rotating shaft (21) which is rotatably nested in the middle of the inner cavity of the outer shell body (11) via a ball bearing. A mounting platform (22) is fixedly sleeved on the middle of the outer side of the rotating shaft (21), and a driven gear (23) is fixedly sleeved on the right side of the outer side of the rotating shaft (21).
5. The testing device for a terrestrial laser communication terminal according to claim 4, characterized in that: The terminal mounting assembly (2) also includes a guide rail (24) fixedly mounted on the right side of the outer shell body (11). A slider (25) is slidably mounted on the outside of the guide rail (24) via a linear bearing. A rack (26) that meshes with the driven gear (23) is fixedly mounted on the top of the slider (25). A transmission arm (27) is fixedly connected to the bottom of the slider (25). A reciprocating nut (28) is fixedly connected to the rear end of the transmission arm (27).
6. The testing device for a terrestrial laser communication terminal according to claim 5, characterized in that: The circulating salt spray assembly (3) includes a water tank (31) fixedly installed at the bottom of the inner cavity of the outer shell body (11) and extending to the front of the outer shell body (11) through a clearance channel (12). An overflow baffle (32) is fixedly installed on the inner side of the water tank (31). The overflow baffle (32) divides the inner cavity of the water tank (31) into a salt solution storage pool and a salt solution recovery pool distributed in the front-back direction. A shielding cover (33) for shielding the salt solution storage pool is fixedly installed on the top of the water tank (31).
7. The testing device for a terrestrial laser communication terminal according to claim 6, characterized in that: A delivery pump (34) is fixedly installed inside the water tank (31). A connecting pipe A (35) is fixedly connected to the output end of the delivery pump (34). A sealing cover (36) is fixedly sleeved on the output end of the connecting pipe A (35). A connecting pipe B (37) is fixedly installed through the left side of the sealing cover (36). A dispersing pipe (38) is fixedly connected to the output end of the connecting pipe B (37). The dispersing pipe (38) is fixedly nested in the top of the inner cavity of the outer shell body (11). Multiple nozzles (39) are fixedly installed on both sides of the dispersing pipe (38).
8. The testing device for a terrestrial laser communication terminal according to claim 7, characterized in that: The quantitative feeding assembly (5) includes a storage hopper (51) fixedly installed on the rear side of the outer shell body (11). A drive shaft (52) is rotatably nested in the middle of the storage hopper (51) via a ball bearing. An impeller (53) and a feeding cylinder (54) are fixedly sleeved on the outer side of the drive shaft (52) from back to front. The feeding cylinder (54) is rotatably installed inside the storage hopper (51). A quantitative groove (55) is opened on the top of the feeding cylinder (54).
9. The testing device for a terrestrial laser communication terminal according to claim 8, characterized in that: The impeller (53) is located inside the sealing cover (36), which is fixedly installed on the rear side of the storage hopper (51).
10. A testing device for a terrestrial laser communication terminal according to claim 9, characterized in that: The transmission shaft (52) has a reciprocating thread in the middle of its outer side, and the reciprocating nut (28) is sleeved on the middle of the outer side of the transmission shaft (52).