Calibration auxiliary prism frame suitable for dark light environment and use method

Abstract

The invention relates to the technical field of calibration assistance, in particular to a calibration assisting prism frame suitable for a dark light environment and a using method, the prism frame comprises a prism suite, a base suite and a support, the prism suite is detachably connected to the top of the base suite, and the support is connected to the bottom of the base suite; wherein the base suite and the support are provided with lighting assemblies used for lighting the surrounding environment and lighting the base suite and the support. According to the technical scheme, the intersection point is formed by the horizontal laser generator and the vertical laser generator of the prism suite, the center of the prism is accurately indicated, and spotlighting of the annular lamp strip of the base is matched, so that the problem that the prism is difficult to identify and align in a dark environment is effectively solved, and the signal capturing capability of the total station on the prism is enhanced; the laser generator of the lower chassis can be accurately aligned with a measuring point, and the base can be quickly leveled by combining the adjustable foot screws, so that the alignment precision and the horizontal stability of the device and the measuring point are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of calibration auxiliary technology, and in particular to a calibration auxiliary prism frame suitable for dark light environment and a use method. BACKGROUND

[0002] In the field of displacement monitoring of engineering buildings and structures, the total station combined with the prism is the core means to realize high-precision measurement, and the measurement precision directly depends on the accurate aiming of the total station on the prism center and the stability of the signal reflection. However, in actual measurement, the light is often dark in the environment such as tunnel and night construction area, and there are significant technical pain points in such environment:

[0003] On the one hand, the measuring personnel cannot clearly identify the prism profile and the center position with naked eyes, which leads to difficult prism alignment operation and directly reduces the measurement precision; on the other hand, the dark light environment will weaken the reflection signal strength of the total station light beam (especially when using non-high reflectivity prism), interfere with the ranging and angle measuring performance, and greatly reduce the stability and reliability of the measurement data. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the related art. To this end, the purpose of the present application is to provide a calibration auxiliary prism frame suitable for dark light environment and a use method to improve the calibration precision.

[0005] The purpose of the present application can be achieved by the following technical solutions:

[0006] To achieve the above-mentioned purpose, the present application provides a calibration auxiliary prism frame suitable for dark light environment, comprising a prism set, a base set and a support, the prism set is detachably connected to the top of the base set, and the support is connected to the bottom of the base set.

[0007] Among them, the base set is provided with an illumination assembly for illuminating the surrounding environment and itself, and the prism set and / or the base set is provided with a centering indication assembly for emitting laser light towards the direction of the target point to be aligned.

[0008] In some embodiments of the present application, the centering indication assembly comprises a prism provided on the prism set and two laser generators one, and the two laser generators one respectively emit laser light along the horizontal direction and the vertical direction.

[0009] Among them, the laser path of one laser generator one extends along the horizontal direction, and the laser path of the other laser generator one extends along the vertical direction, and the laser beams of the two intersect to form an intersection point, which completely corresponds to the physical center of the prism.

[0010] In some embodiments of the present application, the prism kit further comprises a light shield, a battery, a switch, and a threaded hole;

[0011] The light shield is sleeved on the periphery of the prism, the battery is used to supply power to the laser generator, the switch is used to control the closing or opening of the laser generator, and the threaded hole is arranged at the bottom of the prism kit and used to be threadedly connected with the base kit.

[0012] In some embodiments of the present application, the base kit comprises an upper supporting disc, a lower bottom disc, and a plurality of foot screws threadedly connected between the upper supporting disc and the lower bottom disc, and the foot screws are equidistantly distributed along the edge of the upper supporting disc.

[0013] The bottom of the foot screw is rotationally connected with the lower bottom disc, the top of the foot screw is movably connected with the upper supporting disc through a universal joint, and the foot screw is threadedly connected with the universal joint.

[0014] In some embodiments of the present application, the base kit comprises an illumination assembly, a threaded column, and a bubble level, the bubble level is embedded in the top surface of the upper supporting disc, the bubble inside the bubble level is adjusted to be centered by the foot screw, the illumination assembly comprises a ring-shaped light strip embedded on the surface of the upper supporting disc, the light emitting surface of the ring-shaped light strip is obliquely arranged towards the bubble level to form a basin-shaped light gathering structure, and the threaded column is located in the middle of the upper supporting disc and used to be threadedly connected with the prism kit.

[0015] In some embodiments of the present application, the centering indication assembly comprises a second laser generator arranged at the bottom of the lower bottom disc, and the laser emitting direction of the second laser generator is vertically downward aligned with the measuring point along the central axis of the base kit.

[0016] In some embodiments of the present application, the support comprises a plurality of supporting legs equidistantly arranged along the edge of the lower bottom disc, the supporting leg is a telescopic rod structure, the telescopic length is fixed by a locking screw, the bottom end of the supporting leg is detachably connected with a fixing part, and the fixing part is divided into two types according to the hardness and stability requirements of different ground.

[0017] In some embodiments of the present application, when the ground is relatively soft, the fixing part is a ground spike, the ground spike is arranged at the bottom end of the supporting leg, a footrest box is embedded in the position of the side surface of the supporting leg which is higher than the ground spike, a footrest is rotationally connected in the footrest box, and the footrest is turned to face the ground after a certain angle.

[0018] In some embodiments of the present application, when the ground is relatively hard, the fixing part is a flat foot support; the foot support is hinged to the bottom end of the support leg, the top surface of the foot support is provided with a support block for receiving the upper load transmitted by the foot support; the bottom surface of the foot support is provided with a non-slip pad for increasing the friction between the foot support and the ground.

[0019] To achieve the above object, the present application also provides a use method of a calibration auxiliary prism frame suitable for a dark light environment, comprising the following steps:

[0020] Step one: select the corresponding fixing part according to the hardness of the ground and install it at the bottom end of the support leg: if the ground is soft, fix the ground spike at the bottom end of the support leg, and turn out the footrest from the footrest box and make it face the ground; if the ground is hard, hinge the flat foot support to the bottom end of the support leg; then unfold the support, adjust the telescopic length of the support leg by the locking screw, and make the support stand stably on the measurement ground; the soft ground can be made by stepping on the footrest to make the ground spike penetrate into the ground, and the hard ground ensures that the non-slip pad on the bottom surface of the foot support is in close contact with the ground;

[0021] Step two: tighten the connection between the prism set and the threaded column of the base set through the threaded hole, and ensure that the prism set is not loose;

[0022] Step three: turn on the laser generator two of the lower base plate, adjust the telescopic length of the support leg, and make the laser emitted by the laser generator two vertically downward along the central axis of the base set to align with the measurement point;

[0023] Step four: turn on the ring-shaped light belt of the upper supporting plate, and fine-tune each foot screw under the light illumination to make the bubbles in the bubble leveler centered, and complete the leveling of the base set;

[0024] Step five: turn on the laser generator one of the prism set, make the two laser generators one emit laser in horizontal and vertical directions respectively and form an intersection point, the intersection point corresponds to the physical center of the prism, rotate the prism set to make the intersection point align with the direction of the total station, and the operator of the total station positions the center of the prism according to the intersection point;

[0025] Step six: after the calibration is completed, start the measurement work, and press the press-type LED lamp on the footrest as needed to assist in observing the ground environment during the measurement process;

[0026] Step seven: after the measurement is completed, turn off the laser generator one, the ring-shaped light belt, the laser generator two and the press-type LED lamp in sequence, loosen the threaded connection, disassemble the prism set, put the footrest back into the footrest box or disassemble the foot support, adjust the locking screw to shorten the support leg, and complete the storage of the device.

[0027] The present application has the following beneficial effects:

[0028] Compared with the traditional method, the technical scheme forms an intersection point of the horizontal and vertical laser generators with the prism kit, accurately indicates the center of the prism, cooperates with the spotlight lighting of the base annular lamp strip, effectively solves the problem of prism recognition and alignment difficulty in dark environment, and enhances the signal capture ability of the total station on the prism; the laser generator of the lower chassis can accurately align the measuring point, and the adjustable foot screw realizes rapid leveling of the base, thereby improving the alignment accuracy and horizontal stability of the device and the measuring point; the replaceable fixing part of the support adapts to different hardness of the ground, ensures stable erection of the device in various environments, and the integrated design of the overall structure avoids redundant parts, is convenient to operate, and comprehensively improves the efficiency and accuracy of calibration in dark environment. BRIEF DESCRIPTION OF DRAWINGS

[0029] The application will be further described below with reference to the drawings.

[0030] Figure 1 is a perspective view of a calibration auxiliary prism stand suitable for dark environment provided by the application;

[0031] Figure 2 is a perspective view of a prism kit provided by the application;

[0032] Figure 3 is a perspective view of a base kit and a support provided by the application;

[0033] Figure 4 is a perspective view of a support leg in embodiment two provided by the application Figure 1 ;

[0034] Figure 5 is a perspective view of a support leg in embodiment two provided by the application Figure 2 ;

[0035] Figure 6 is a flowchart of a use method of a calibration auxiliary prism stand suitable for dark environment provided by the application.

[0036] In the figure: 1, measuring point; 2, prism kit; 21, prism; 22, light shield; 23, laser generator one; 24, battery; 25, switch; 26, threaded hole; 3, base kit; 31, upper supporting disc; 32, lower chassis; 33, foot screw; 34, laser generator two; 35, annular lamp strip; 36, threaded column; 37, bubble level; 4, support; 41, support leg; 42, locking screw; 43, foot support; 44, support block; 45, non-slip pad; 46, footrest box; 47, ground nail; 48, footrest; 49, press type LED lamp. DETAILED DESCRIPTION

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] Example 1:

[0039] like Figure 1 As shown, this embodiment provides a calibration auxiliary prism frame suitable for low-light environments, including a prism kit 2, a base kit 3, and a bracket 4. Together, they form the basis for the stable support, precise centering, and horizontal adjustment of the entire device. The prism kit 2 is detachably connected to the top of the base kit 3, and the bracket 4 is connected to the bottom of the base kit 3. The base kit 3 is provided with an illumination component for illuminating the surrounding environment and itself, and the prism kit 2 and / or the base kit 3 are provided with a centering indicator component that emits a laser toward the target point to be aligned.

[0040] In some embodiments of the present invention, such as Figure 2 As shown, the centering indicator assembly includes a prism 21 mounted on the prism kit 2 and two laser generators 23. The two laser generators 23 emit lasers in the horizontal and vertical directions, respectively. The laser path of one laser generator 23 extends horizontally, and the laser path of the other laser generator 23 extends vertically. These two laser beams must intersect at a point in space. Through precise assembly and calibration, this spatial intersection point is ensured to completely coincide with the physical center (also the optical center) of the prism 21 in three-dimensional space.

[0041] Once the prism is set up, the operator rotates the entire prism assembly 2, oriented it towards the distant total station. At this point, the total station operator no longer sees a blurry prism outline in the telescope's field of view, but rather a clear "+" shaped spot or intersection point formed by horizontal and vertical laser beams. This intersection point is the precise center of the prism; the total station operator simply aligns the instrument's crosshairs with this intersection point to achieve precise aiming at the prism's center.

[0042] The prism kit 2 also includes a light shield 22, a battery 24, a switch 25 and a threaded hole 26. The battery 24 and the switch 25 are built inside the prism kit 2, which makes it a fully functional module and can work independently without power supply from the base, simplifying the electrical connection. The light shield 22 is sleeved on the periphery of the prism 21, which can effectively reduce the influence of stray light on the ranging accuracy of the prism; the battery 24 is used to power the laser generator 23, and the switch 25 is used to control the closing or opening of the laser generator 23; the threaded hole 26 is arranged at the bottom of the prism kit 2 and is used for threaded connection with the base kit 3.

[0043] In use, the threaded hole 26 at the bottom of the prism kit 2 is aligned with the threaded column 36 at the top of the base kit 3, and is rotated clockwise until it is tightened, ensuring that the prism kit 2 is stably connected with the base without shaking; then the indicating laser is turned on: the switch 25 on the prism kit 2 is pressed to start the two laser generators 23. At this time, a pair of orthogonal laser beams will be emitted from the center of the prism. The operator communicates through visual observation or a intercom, and rotates the entire prism kit 2 (which can be freely rotated on the upper support disc 31) to make the emission direction of the laser beam roughly point to the position where the total station is located. The operator of the total station in the distance finds and locks the laser intersection point through the telescope, and accurately aims the crosshair of the total station at the point, completing the aiming work.

[0044] Since it is very time-consuming to find and accurately aim at the center of a prism without active identification in a dark, long-distance or complex background environment. The laser intersection point provides a high-brightness and clear visual target, which changes the aiming process from "finding" to "aiming", improves the efficiency by several times, and eliminates the aiming error caused by unclear vision and unclear target of the total station operator, ensuring that each aiming is accurately directed to the physical center of the prism, thereby improving the accuracy of angle and distance measurement. At the same time, the prism kit 2 as an independent unit is easy to install and remove, and is convenient for separate maintenance and carrying.

[0045] In some embodiments of the present application, as shown in Figure 3 The base kit 3 includes an upper support disc 31, a lower bottom disc 32 and a foot screw 33 threaded between the two, a plurality of foot screws 33 are equally distributed along the edge of the upper support disc 31; the bottom of the foot screw 33 is rotationally connected with the lower bottom disc 32, the top of the foot screw 33 is movably connected with the upper support disc 31 through a universal joint, and the foot screw 33 is threadedly connected with the universal joint;

[0046] The base set 3 further comprises an illumination assembly, a threaded column 36 and a bubble level 37; wherein the bubble level 37 is embedded in the top surface of the upper saucer 31, and the bubble inside the bubble level 37 is adjusted to be centered by the foot screws 33; the specific operation is as follows: the operator adjusts the three foot screws 33 to change the inclination angle of the upper saucer 31 relative to the lower base 32, and the universal joint structure between the foot screw 33 and the upper saucer 31 ensures the flexibility and stability of the connection during the adjustment. When the bubble inside the bubble level 37 moves to the center circle, it indicates that the top surface of the upper saucer 31 has been strictly leveled.

[0047] The illumination assembly comprises a ring-shaped light strip 35 embedded in the surface of the upper saucer 31, and the light-emitting surface of the ring-shaped light strip 35 is inclined to the bubble level 37 to form a basin-shaped spotlight structure. This design can concentrate light on the bubble level and the operation area of the surrounding foot screws 33, while avoiding light scattering outward or directly shining into the operator's eyes, causing glare. It provides sufficient and non-interfering illumination for leveling operation in a dark environment; the threaded column 36 is located in the middle of the upper saucer 31 and is used to be screwed with the threaded hole 26 at the bottom of the prism set 2, which is convenient and fast to connect.

[0048] In some embodiments of the present application, the centering indication assembly comprises a laser generator two 34 arranged at the bottom of the lower base 32, and the laser beam thereof is accurately calibrated to be strictly along the central axis of the base set 3. When the device is erected, starting the laser generator two 34 will form a clear light spot on the ground. By adjusting the support 4, the light spot is aligned with the ground measuring point 1, such as the top of the settlement nail with a cross-shaped center, which can ensure that the central axis of the prism frame and the measuring point 1 are accurately overlapped in the vertical direction, which is called "forced centering" in surveying.

[0049] In some embodiments of the present application, the support 4 comprises legs 41 which are circumferentially and equally spaced on the edge of the lower base 32, and the legs 41 are telescopic rod structures, allowing the height to be adjusted and adapting to uneven ground, and the telescopic length is fixed by locking screws 42.

[0050] For example, the support 4 adopts a classic tripod structure composed of three legs 41, which can ensure stable standing on any surface in geometry.

[0051] In use, the locking screw 42 is loosened, the three legs 41 are unfolded, the length of the legs 41 is adjusted to the appropriate height and is preliminarily locked, so that the base set 3 is roughly horizontal. Then the laser generator two 34 at the bottom of the lower chassis 32 is turned on, and the laser spot projected on the ground is observed. By overall translation and fine adjustment of the length of the legs 41, the laser spot is accurately aligned with the center of the measuring point 1. Then the ring-shaped light strip 35 on the upper bearing disc 31 is turned on, and the bubble level 37 and its surrounding environment are illuminated. The operator observes the position of the bubble, and rotates the three foot screws 33 simultaneously or alternately to fine adjust the pitch and roll of the upper bearing disc 31 until the bubble in the bubble level 37 is completely centered. After leveling is completed, it is checked again whether the centering laser spot is still in the center of the measuring point 1. If there is deviation, repeat the above steps.

[0052] Embodiment two:

[0053] In this embodiment, as shown in Figure 4 、 Figure 5 , the bottom end of the leg 41 is detachably connected with a fixing part, and the fixing part is divided into two types according to the hardness and stability requirements of different ground. The design of the two types of structures adapts to the hardness and stability requirements of different ground, and ensures that the prism frame can be reliably assisted to calibrate in various environments through differentiated ground grabbing / supporting modes.

[0054] For example, when the ground is relatively soft, the fixing part is a ground nail 47. The ground nail 47 is arranged at the bottom end of the leg 41, and the side surface of the leg 41 is embedded with a stirrup box 46 at a position higher than the ground nail 47. A stirrup 48 is rotatably connected in the stirrup box 46, and the stirrup 48 is turned to a certain angle and faces the ground. A recess is formed on the surface of the stirrup 48 facing the ground, and a press-type LED lamp 49 is arranged in the recess. The other surface of the stirrup 48 away from the ground is formed with anti-skid lines. The ground nail 47 is sharp, and cooperates with the stirrup 48 to be inserted into the ground by stepping, and is suitable for soft and deformable ground environment, such as natural ground like soil, grassland, sand ground, etc. The ground nail 47 can be inserted into the surface layer and enhance the stability of the device through deep engagement, so as to avoid tilting or displacement caused by soft ground. In the outdoor field with slight slope, the ground nail 47 can offset the sliding trend caused by the slope through the insertion angle, so as to ensure that the prism frame remains vertical and stable on the uneven soft ground.

[0055] The embedded design of the stirrup box 46 makes the surface of the leg 41 free of protrusions, which is conducive to storage. The surface of the stirrup 48 facing the ground is provided with a recess, which not only forms a containing space to accommodate the press-type LED lamp 49 and illuminate the ground environment, but also facilitates the user to insert his fingers and rotate the stirrup 48 from the stirrup box 46.

[0056] For example, when the ground is relatively hard, the fixing part is a flat plate-type tripod support 43. The tripod support 43 is hinged to the bottom end of the support leg 41. The top surface of the tripod support 43 is provided with a support block 44 to bear the upper load transmitted by the tripod support 43. The bottom surface of the tripod support 43 is provided with an anti-slip pad 45 to increase the friction between the tripod support 43 and the ground. The tripod support 43 is suitable for hard, flat or slippery ground environments, such as: cement ground, asphalt road surface, tile and other hard flat ground. The flat plate support block 44 can disperse pressure through large-area contact, and the anti-slip pad 45 increases friction to prevent the device from sliding on smooth hard surfaces. In indoor venues or artificially poured flat surfaces, such environments do not require penetrating the ground. The flat plate structure can avoid damaging the ground, and the anti-slip pad 45 ensures stability, which is suitable for high-precision calibration requirements.

[0057] Example 3:

[0058] like Figure 6 As shown, this embodiment provides a method for using a calibration auxiliary prism holder suitable for low-light environments, including the following steps:

[0059] Step 1: Select the appropriate fixing part according to the hardness of the ground and install it on the bottom of the outrigger 41: If the ground is soft, fix the ground spike 47 to the bottom of the outrigger 41, and turn the foot pedal 48 out of the foot pedal box 46 and make it face the ground; if the ground is hard, hinge the flat tripod support 43 to the bottom of the outrigger 41; then unfold the bracket 4, adjust the extension length of the outrigger 41 by tightening the locking screw 42, so that the bracket 4 stands stably on the measuring ground. On soft ground, the ground spike 47 can be driven into the ground by stepping on the foot pedal 48. On hard ground, ensure that the anti-slip pad 45 on the bottom of the tripod support 43 is in contact with the ground.

[0060] Step 2: Tightly connect the prism kit 2 to the threaded post 36 of the base kit 3 through the threaded hole 26, ensuring that the prism kit 2 is not loose;

[0061] Step 3: Open the laser generator 2 34 on the lower chassis 32, adjust the extension length of the support leg 41, so that the laser emitted by the laser generator 2 34 is vertically downward along the central axis of the base kit 3 and aligned with the center of the crosshair of the measuring point 1.

[0062] Step 4: Turn on the ring light strip 35 of the upper support plate 31, and under the illumination of the light, fine-tune the screws 33 of each foot to center the bubble in the bubble level 37, and complete the leveling of the base kit 3;

[0063] Step 5: Turn on the laser generator 23 of prism kit 2, so that the two laser generators 23 emit lasers in the horizontal and vertical directions respectively and form an intersection point. The intersection point corresponds to the physical center of prism 21. Rotate prism kit 2 to align the intersection point with the direction of the total station. The total station operator locates the center of prism 21 based on the intersection point.

[0064] Step six: after completing the calibration, start the measurement operation. During the measurement process, press the push-type LED light 49 on the footrest 48 as needed to assist in observing the ground environment;

[0065] Step seven: after the measurement is completed, turn off the laser generator one 23, the ring-shaped light strip 35, the laser generator two 34, and the push-type LED light 49 in sequence, loosen the threaded connection to remove the prism kit 2, retract the footrest 48 into the footrest box 46 or disassemble the footrest support 43, adjust the locking screw 42 to shorten the support leg 41, and complete the device storage.

[0066] The use method ensures stable erection of the device in various environments by step-by-step adaptation of the fixing part to different ground. With the help of the laser centering and lighting assembly, precise alignment of the measurement point 1 and the center of the prism 21 and rapid leveling of the base in a dark environment are achieved, simplifying the calibration operation process. At the same time, the laser and lighting functions are activated as needed, and the orderly storage steps are coordinated, which not only ensures the convenience and accuracy of the measurement process, but also facilitates the maintenance and carrying of the device, comprehensively improving the efficiency and reliability of calibration and measurement in a dark environment.

[0067] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0068] The above is only an example and description of the present application. Those skilled in the art can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, as long as they do not deviate from the invention or exceed the scope defined by the present claims, and should belong to the protection scope of the present application.

Claims

1. A calibration aid prism stand suitable for use in low light environments comprising a prism kit, a base kit and a stand, characterised in that, The prism kit is detachably connected to the top of the base kit, and the support is connected to the bottom of the base kit; The base kit is provided with a lighting assembly for illuminating the surrounding environment and itself, and the prism kit and / or the base kit is provided with a centering indication assembly for emitting laser light towards the direction of the target point to be aligned.

2. The prism mount of claim 1, wherein, The centering indication assembly comprises a prism provided on the prism kit and two laser generators I, which respectively emit laser light in the horizontal and vertical directions; The laser path of one laser generator I extends in the horizontal direction, and the laser path of the other laser generator I extends in the vertical direction, and the laser beams of the two intersect in space to form an intersection point which completely corresponds to the physical center of the prism.

3. The prism mount of claim 2, wherein, The prism kit further comprises a light shield, a battery, a switch and a threaded hole; The light shield is sleeved on the periphery of the prism, the battery is used to power the laser generator I, and the switch is used to control the closing or opening of the laser generator I; the threaded hole is provided at the bottom of the prism kit and is used to be threadedly connected with the base kit.

4. The prism mount of claim 1, wherein, The base kit comprises an upper support disc, a lower bottom disc and foot screws threadedly connected between the two, and a plurality of foot screws are equidistantly distributed along the edge of the upper support disc; The bottom of the foot screw is rotationally connected with the lower bottom disc, and the top of the foot screw is movably connected with the upper support disc through a universal joint, and the foot screw is threadedly connected with the universal joint.

5. The prism mount of claim 4, wherein, The base kit comprises a lighting assembly, a threaded column and a bubble level; the bubble level is embedded in the top surface of the upper support disc, and the bubble inside the bubble level is adjusted to be centered by the foot screw; the lighting assembly comprises a ring-shaped light strip embedded on the surface of the upper support disc, and the light emitting surface of the ring-shaped light strip is obliquely arranged towards the bubble level to form a basin-shaped light gathering structure; the threaded column is located in the middle of the upper support disc and is used to be threadedly connected with the prism kit.

6. The prism mount of claim 4, wherein, The centering indication assembly comprises a laser generator II provided at the bottom of the lower bottom disc, and the laser emission direction of the laser generator II is vertically downward towards the measuring point along the central axis of the base kit.

7. The prism mount of claim 1, wherein, The support comprises support legs which are circumferentially and equidistantly arranged at the edge of the lower bottom disc, and the support legs are in the form of telescopic rods, the telescopic length of which is fixed by locking screws, and the bottom end of the support leg is detachably connected with a fixing part which is divided into two types according to the hardness and stability requirements of different ground surfaces.

8. The prism mount of claim 7, wherein, When the ground is relatively soft, the fixing part is a ground spike, the ground spike is arranged at the bottom end of the support leg, and a footrest box is embedded in the position of the side surface of the support leg which is higher than the ground spike, a footrest is rotationally connected in the footrest box, and the footrest is turned towards the ground after a certain angle; one side of the footrest towards the ground is provided with a groove, a press-type LED lamp is arranged in the groove, and the other side of the footrest away from the ground is formed with anti-slip lines.

9. The prism mount of claim 7, wherein, When the ground is hard, the fixing part is a flat foot support; the foot support is hinged to the bottom end of the leg, the top surface of the foot support is provided with a support block for receiving the upper load transmitted by the foot support; the bottom surface of the foot support is provided with a non-slip pad for increasing the friction between the foot support and the ground.

10. A method of using a calibration aid prism mount adapted for use in low light environments, the method comprising: The method comprises the following steps: Step one: select the corresponding fixing part according to the hardness of the ground and install it at the bottom end of the leg: if the ground is soft, fix the ground spike at the bottom end of the leg, turn out the footrest from the footrest box and make it face the ground; if the ground is hard, hinge the flat foot support to the bottom end of the leg; then unfold the support, adjust the length of the legs by locking screws, and make the support stand stably on the measuring ground; soft ground can be made by stepping on the footrest to make the ground spike penetrate into the ground, and hard ground ensures that the bottom surface of the foot support is in close contact with the ground; Step two: tighten the prism kit through the threaded hole and the threaded column of the base kit to ensure that the prism kit is not loose; Step three: turn on the laser generator two of the lower chassis, adjust the length of the legs, and make the laser emitted by the laser generator two vertically downward along the central axis of the base kit to align with the measuring point; Step four: turn on the ring-shaped light belt of the upper support plate, and under the light illumination, fine-tune each foot screw to make the bubbles in the bubble leveler centered, and complete the leveling of the base kit; Step five: turn on the laser generator one of the prism kit, make the two laser generators one emit laser light in horizontal and vertical directions respectively and form an intersection point, the intersection point corresponds to the physical center of the prism, rotate the prism kit to make the intersection point align with the direction of the total station, and the total station operator positions the prism center according to the intersection point; Step six: after calibration, start the measurement work, and press the press-type LED lamp on the footrest as needed to assist in observing the ground environment during the measurement process; Step seven: after the measurement is completed, turn off the laser generator one, the ring-shaped light belt, the laser generator two and the press-type LED lamp in turn, loosen the threaded connection, remove the prism kit, put the footrest back into the footrest box or disassemble the foot support, adjust the locking screw to shorten the leg, and complete the device storage.

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