Prism bar and coordinate lofting calculation method

Abstract

The invention discloses a prism bar and a coordinate lofting measurement and calculation method, and relates to the technical field of construction measurement, the prism bar comprises a bar body and a foot stool used for supporting the bar body, and two prism assemblies are arranged in the middle of the bar body; according to the coordinate lofting calculation method, three-dimensional coordinates of the two prism assemblies can be directly measured after a total station is arranged, the coordinate positions of the two three-dimensional coordinates after being projected to the ground are A and B respectively, and a straight line AB is obtained by connecting the point A and the point B; calculating a plane projection distance d1 between the point A and the point O, and calculating a quadrant angle and an azimuth angle of a straight line AB; calculating bottom end coordinates of the O-point rod body; according to the invention, the two prism assemblies are arranged on the prism bar, the coordinates of the two prism assemblies are observed by using the total station, and the bottom coordinates of the bar body are directly calculated, such a measurement mode has low requirements for the verticality of the prism bar, the prism bar does not need to be frequently adjusted by cooperating with a level bubble, and the measurement speed is faster.

Description

Technical Field

[0001] The present invention relates to the technical field of construction surveying, and particularly to a prism rod and a coordinate layout calculation method. Background Art

[0002] A prism rod is a tool used in conjunction with surveying instruments such as total stations. It usually consists of a prism and a rod body. The prism is used to reflect the surveying light emitted by the total station, thereby helping the total station complete the measurement of distance and angle.

[0003] When using a prism rod, it is extremely easy for the rod body to tilt due to unstable insertion placement, uneven ground, or other external forces, resulting in measurement errors. Therefore, during the measurement process of a total station, in the existing measurement method, it is necessary to frequently observe the attitude of the prism rod by the total station. When tilting is found, it is adjusted using a circular spirit level. After adjustment, the total station is used for measurement again, and this adjustment process often needs to be carried out multiple times during a layout measurement process of the prism rod. Whether it is a single-person operation or a multi-person cooperation operation, it is relatively troublesome, consuming a large amount of manpower and taking a long time for measurement. Summary of the Invention

[0004] The purpose of the present invention is to provide a prism rod and a coordinate layout calculation method to solve the problems in the above-mentioned background art that in the existing technology, during a layout measurement process of the prism rod, it is necessary to adjust the attitude of the prism rod multiple times, consuming a large amount of manpower and taking a long time for measurement.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A prism rod includes a rod body and a tripod for supporting the rod body. Two prism assemblies are provided in the middle of the rod body, and scale lines are coated on the outer wall of the rod body.

[0007] As a further scheme of the present invention: The prism assembly includes a sliding sleeve. Both sides of the sliding sleeve are fixedly connected with ear plates. A notch is opened at the bottom of one side of the ear plate. A locking bolt is rotatably installed on the inner wall of the notch. One end of the locking bolt passes through the ear plate and the sliding sleeve and is fixedly connected with an anti-slip pad. One side of the anti-slip pad is in tight contact with the rod body.

[0008] As a further scheme of the present invention: The tripod includes a central assembly and several support feet rotatably connected to the edge of the central assembly. The central assembly includes an outer sleeve. Several connecting frames are fixedly connected to the outer wall of the outer sleeve. One end of each of the several support feet is rotatably connected to the inner wall of one of the several connecting frames. The other end of each of the several support feet is fixedly connected with a needle seat, and one end of the needle seat.

[0009] As a further solution of the present invention: an inner sleeve is arranged inside the outer sleeve. A threaded section is provided at the bottom of the inner sleeve. A plurality of through grooves are provided in the middle of the threaded section. Locking pressure pieces are fixedly connected to the inner walls of the plurality of through grooves. One end of the locking pressure piece is inclined towards the side away from the rod body. A pressing pad is fixedly connected to the other side of the locking pressure piece. A locking ring is threadedly connected to the bottom of the threaded section. An adjusting ring is fixedly connected to the bottom of the locking ring.

[0010] As a further solution of the present invention: a plurality of adjusting bolts are threadedly connected to the middle of the outer sleeve ring. Ball head pieces are fixedly connected to one ends of the plurality of adjusting bolts. One end of the ball head piece is ball-joint hinged to the outer wall of the inner sleeve ring.

[0011] As a further solution of the present invention: the support feet are divided into an upper rod section rotatably connected to the connecting frame and a lower rod section fixedly connected to the needle base. A linear motor is fixedly installed at the center of the bottom of the upper rod section. The output end of the linear motor is fixedly connected to the center of the top of the lower rod section. A control switch is fixedly installed at one end of the upper rod section close to the connecting frame. The control switch is electrically connected to the linear motor.

[0012] As a further solution of the present invention: a plurality of reinforcing rods are slidably connected to the edge of the end of the upper rod section. One ends of the plurality of reinforcing rods are fixedly connected to the edge of the top of the lower rod section.

[0013] As a further solution of the present invention: a dust-proof sleeve is fixedly connected to the outer side wall of the top of the lower rod section. One end of the dust-proof sleeve is slidably connected to the upper rod section.

[0014] As a further solution of the present invention: a hanging seat is rotatably connected to the bottom of the rod body. A positioning needle is fixedly connected to the bottom of the hanging seat.

[0015] A method for coordinate lofting calculation of a prism rod includes the following steps:

[0016] Step 1: Install the prism rod at the measurement point;

[0017] Step 2: Slide and adjust the positions of the two prism components and fix them. Denote the coordinates of the bottom end of the rod body at this time as O(X O , Y O ). Denote the distance between the prism component located below and the bottom end of the rod body as S 1 , and the distance between the two prism components as S 2 ;

[0018] Step 3: After setting up the total station, the three-dimensional coordinates of the two prism components A'(X A , Y A , H A ), B'(XB , Y B , H B ), where A' is the coordinate of the prism assembly located above, B' is the coordinate of the prism assembly located below, and after the two three-dimensional coordinates are projected onto the ground, the coordinate positions are: A(X A , Y A ) and B(X B , Y B );

[0019] Step Four: Calculate the planar projection distance d between point A and point O 1 , calculate the quadrant angle R of the straight line AB AB , calculate the azimuth angle α of the straight line AB AB ;

[0020] Step Five: Calculate the coordinates of point O, where X O = X B + d 1 cosα AB , Y O = Y B + d 1 sinα AB .

[0021] As a further solution of the present invention: The calculation method of d 1 in the above step is: First, calculate the planar projection distance d 2 between points A and B, ΔY = Y B - Y A ; ΔX = X B - X A ; The angle between the rod body and the horizontal plane Finally, calculate d 1 = S 1 cosα;

[0022] The quadrant angle The azimuth angle α AB The calculation method is:

[0023] If ΔX > 0 and ΔY ≥ 0, then α AB = R AB ;

[0024] If ΔX < 0 and ΔY ≥ 0, then α AB = 180° - R AB ;

[0025] If ΔX < 0 and ΔY < 0, then α AB = 180° + R AB ;

[0026] If ΔX > 0 and ΔY < 0, then α AB = 360° - R AB ;

[0027] If ΔX = 0 and ΔY > 0, then α AB = 90°;

[0028] If ΔX = 0 and ΔY < 0, then α AB = 270°.

[0029] As a further solution of the present invention: when the rod body is deformed, S in step two 2 needs to be calculated, and the calculation method is: ΔH = H B - H A ;

[0030] Compared with the prior art, the beneficial effects of the present invention are: the coordinate setting-out measurement method of the present invention, by setting two prism assemblies on the prism rod, observing the coordinates of the two prism assemblies by using a total station, and directly calculating the bottom coordinates of the rod body. This measurement method has a lower requirement for the verticality of the prism rod, does not require frequent adjustment of the prism rod with a spirit level, saves manpower and time, and has a faster measurement speed;

[0031] To cooperate with the implementation of this measurement method, the present invention proposes a prism rod equipped with two prism assemblies, and on this basis, a prism assembly with sliding adjustment is set, and scales are set on the rod body to facilitate flexible adjustment and real-time reading of the position of the prism assembly;

[0032] Furthermore, to facilitate the support of the rod body and the rapid adjustment of the attitude of the rod body, the present invention divides the support feet on the support frame into two sections, that is, the overall length of the support feet is adjusted by pushing the lower rod section out driven by a linear motor, so that the support frame can stably install the rod body under different ground conditions;

[0033] The present invention realizes the sliding connection between the tripod and the rod body through the central component, and realizes the locking control of the inner sleeve of the central component and the rod body through structures such as the locking ring and locking pressure plate on the central component, so that the connection position of the tripod is flexibly adjustable. Description of the Drawings

[0034] Figure 1 is a three-dimensional view of the prism rod of the present invention;

[0035] Figure 2 is a three-dimensional view of the prism assembly of the present invention;

[0036] Figure 3 is a three-dimensional view of the central component of the present invention;

[0037] Figure 4 Cross-sectional view of the central component of the present invention;

[0038] Figure 5 Schematic position diagram of the linear motor of the present invention;

[0039] Figure 6 Schematic diagram of the rod body structure of the second embodiment of the present invention;

[0040] Figure 7 Schematic diagram of the structure of the splicing section of the second embodiment of the present invention;

[0041] Figure 8 Flow chart of the prism rod coordinate lofting measurement method of the present invention;

[0042] Figure 9 Schematic position marking diagram of the measured size of the prism rod of the present invention;

[0043] Figure 10 Schematic position marking diagram of the measured angle of the prism rod of the present invention.

[0044] In the figure: 1. Rod body; 2. Prism assembly; 201. Sliding sleeve; 202. Ear plate; 203. Locking bolt; 3. Positioning pin; 4. Central component; 401. Inner sleeve; 402. Outer sleeve; 403. Adjusting bolt; 404. Locking piece; 405. Locking ring; 406. Adjusting ring; 407. Connecting frame; 408. Pressing pad; 409. Ball head part; 5. Support foot; 501. Linear motor; 502. Dust cover; 503. Reinforcing rod; 504. Needle seat; 505. Upper rod section; 506. Lower rod section; 507. Control switch; 6. Splicing rod; 601. Splicing section; 602. Docking screw thread; 603. Docking screw head; 604. Anti-slip pattern; 7. Hanging seat. Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0046] Embodiment 1

[0047] Please refer to Figure 1, in the embodiment of the present invention, a prism rod includes a rod body 1 and a tripod for supporting the rod body 1. Two prism assemblies 2 that can slide along the length direction of the rod body 1 are arranged in the middle of the rod body 1, and the two prism assemblies 2 are arranged vertically; a hanging seat 7 is threadedly connected to the bottom of the rod body 1. The hanging seat 7 is a solid iron block with a pointed cone at the bottom, that is, the weight function is realized by the weight of the hanging seat 7 itself, which is convenient for the whole rod body to maintain a vertical posture; a positioning pin 3 is fixedly connected to the bottom of the hanging seat 7. During use, the positioning pin 3 is inserted into the ground, and the insertion position is the lofting coordinate point to be measured in this application. The shape and length of the positioning pin 3 are various and can be replaced according to the soil condition of the ground at the position to be measured. That is, when needed, the hanging seat 7 is rotated and removed, and the hanging seat 7 and the positioning pin are replaced as a whole. The outer wall of the rod body 1 is coated with scale lines; this is convenient for directly reading the distance between the lower prism assembly and the positioning pin 3 at the bottom of the rod body 1, and the distance between the two prism assemblies 2.

[0048] Please refer to Figure 2 , to achieve the sliding adjustment of the two prism assemblies 2, the prism assembly 2 includes a sliding sleeve 201. Ear plates 202 are fixedly connected to both sides of the sliding sleeve 201. By setting the ear plates 202, it is convenient to hold the sliding sleeve 201 for displacement adjustment. A notch is opened at the bottom of one side of the ear plate 202. A locking bolt 203 is rotatably installed on the inner wall of the notch. One end of the locking bolt 203 passes through the ear plate 202 and the sliding sleeve 201 and is fixedly connected with an anti-slip pad. One side of the anti-slip pad is in tight contact with the rod body 1. By rotating the locking bolt 203 to push the anti-slip pad out, when the anti-slip pad is in tight contact with the outer wall of the rod body 1, the overall locking and positioning of the prism assembly 2 is realized. The length of the locking bolt 203 is such that its end is always located within the notch during rotation, so that there are no protrusions on the side of the ear plate 202, which is more convenient to pick up.

[0049] To support the rod body 1, a tripod is provided in this application. Please refer to Figure 1 and Figure 3 , the tripod includes a central assembly 4, and several support feet 5 are rotatably connected to the edge of the central assembly 4. In this embodiment, two support feet 5 are provided; in actual applications, the prism rod is usually ensured to be vertical and stable through precise calibration and centering. Compared with the common setting of three support feet arranged at equal distances, the design of two support feet is based on considerations such as its simplified structure, light weight, durability, easy calibration and centering, and improved measurement efficiency. Specifically in use, setting three support feet should not be understood as making a substantial difference from this application.

[0050] The central component 4 includes an outer sleeve 402. Two connecting brackets 407 are fixedly connected to the outer wall of the outer sleeve 402. One ends of two support feet 5 are respectively rotatably connected to the inner walls of several connecting brackets 407. The other ends of the support feet 5 are fixedly connected to a needle base 504. One end of the needle base 504 is fixedly connected to a pin. Through the insertion and fixation of the pin into the ground, the support of the tripod is realized, and further the support of the rod body 1 is realized.

[0051] Please refer to Figure 3 and Figure 4 To realize the fixation between the central component 4 and the rod body 1, and further realize the connection between the tripod and the rod body 1; an inner sleeve 401 is arranged inside the outer sleeve 402. The length of the inner sleeve 401 is shorter than that of the outer sleeve 402. A threaded section is opened at the bottom of the inner sleeve 401. Several through grooves are opened in the middle of the threaded section. Locking pressure pieces 404 are fixedly connected to the inner walls of several through grooves. One end of the locking pressure piece 404 is inclined towards the side away from the rod body 1. A pressing pad 408 is fixedly connected to the other side of the locking pressure piece 404. A locking ring 405 is threadedly connected to the bottom of the threaded section. An adjusting ring 406 is fixedly connected to the bottom of the locking ring 405. By rotating the adjusting ring 406 to drive the locking ring 405 to rotate, due to the threaded connection between the locking ring 405 and the threaded section, the locking ring 405 moves upward simultaneously during the rotation. When the locking ring 405 passes through the position of the locking pressure piece 404, the locking pressure piece 404 is squeezed inward, so that the pressing pad 408 is in tight contact with the rod body 1, realizing the fixation of the inner sleeve 401.

[0052] To realize the connection between the inner sleeve 401 and the outer sleeve 402, several adjusting bolts 403 are threadedly connected to the middle of the outer sleeve ring. One ends of several adjusting bolts 403 are fixedly connected to ball head parts 409. One end of the ball head part 409 is ball-joint hinged to the outer wall of the inner sleeve ring. By ball-joint hinging the end of the adjusting bolt 403 to the inner sleeve 401, the top lengths of the adjusting bolts 403 at different positions can be changed, and then the rod body 1 is pushed to tilt, realizing the adjustment of the attitude of the rod body 1. The ball-joint hinging method meets the need to keep the stable connection between the adjusting bolt 403 and the inner sleeve 401 when the rod body 1 tilts and displaces during the pushing process.

[0053] Please refer to Figure 5, to adjust the overall length of the support leg 5, so as to achieve stable installation on ground with different flatness; the support leg 5 of the present application is divided into an upper rod section 505 rotatably connected to the connecting frame 407 and a lower rod section 506 fixedly connected to the needle base 504. The side of the upper rod section 505 close to the lower rod section 506 is called the bottom end. A linear motor 501 is fixedly installed at the center of the bottom end of the upper rod section 505. The side of the lower rod section 506 close to the upper rod section 505 is called the top end. The output end of the linear motor 501 is fixedly connected to the center of the top end of the lower rod section 506. A control switch 507 is fixedly installed at one end of the upper rod section 505 close to the connecting frame 407. The control switch 507 is electrically connected to the linear motor 501. The linear motor 501 is adjusted to eject and retract through the control switch 507; through the ejection and recovery of the output end of the linear motor 501, the lower rod section 506 is driven to eject and contract, so as to adjust the overall length of the support leg 5.

[0054] To improve the connection stability between the upper rod section 505 and the lower rod section 506, several reinforcing rods 503 are slidably connected to the edge of the end of the upper rod section 505. One ends of the several reinforcing rods 503 are fixedly connected to the top edge of the lower rod section 506. The connection between the upper rod section 505 and the lower rod section 506 is assisted by the several reinforcing rods 503, the lateral bearing capacity of the whole support leg 5 is improved, and it is beneficial for the whole support leg 5 to keep vertical.

[0055] To prevent dust and impurities from the outside from entering between the upper rod section 505 and the lower rod section 506 during use and hinder the operation of the linear motor 501, a dust-proof sleeve 502 is fixedly connected to the outer side wall of the top of the lower rod section 506. One end of the dust-proof sleeve 502 is slidably connected to the upper rod section 505. The length of the dust-proof sleeve 502 is greater than the movement stroke of the linear motor 501, so as to ensure that the dust-proof sleeve 502 can stably shield between the upper rod section 505 and the lower rod section 506 during the operation of the linear motor 501.

[0056] Please refer to Figures 8 - 10 , a method for prism rod coordinate layout calculation, including the following steps:

[0057] First, install the prism rod at the measurement point. This step includes the adjustment and installation process of the prism rod; specifically: first place the tripod on the ground, use the tripod to support the rod body 1, rotate the adjustment ring 406 to drive the locking ring 405 to rotate, use the locking ring 405 to squeeze the locking pressing piece 404 inward, so that the pressing pad 408 is in tight contact with the rod body 1, realize the connection between the central component 4 and the rod body 1, and then realize the fixation of the tripod; then adjust the length of the support leg 5 through the control switch 507, so that the position of the central component 4 is basically horizontal, and then rotate each adjustment bolt 403 to push the rod body 1 to change its posture, so that the rod body 1 is in a basically vertical state;

[0058] Then, slide and adjust the positions of the two prism assemblies 2, that is, hold the ear plate 202 and push or pull to drive the sliding sleeve 201 to move. After adjusting to the corresponding position, rotate the locking bolt 203, and the locking bolt 203 pushes against the anti-slip pad to contact the rod body 1 to fix the prism assembly 2; by adjusting, it is possible to avoid the occlusion of other obstacles on the site to the prism assembly 2, so that the total station can observe the two prism assemblies 2;

[0059] Record the coordinates of the bottom end of the rod body 1 at this time as O(X O , Y O ). Denote the distance between the prism assembly 2 located below and the bottom end of the rod body 1 as S 1 , and the distance between the two prism assemblies 2 as S 2 ; then observe and calculate through the total station. For the specific meanings of the parameters required for the calculation, please refer to Figure 9 , Figure 9 Equivalent the prism rod in the working state to the inclined rod body 1 and the two prism assemblies 2 thereon, so as to represent the prism rod in an inclined state without complete leveling during the layout measurement process;

[0060] The specific calculation method is as follows:

[0061] First, after setting up the total station, the three-dimensional coordinates of the two prism assemblies A'(X A , Y A , H A ) and B'(X B , Y B , H B ) can be directly measured, where A' is the coordinate of the upper prism assembly and B' is the coordinate of the lower prism assembly. After projecting the two three-dimensional coordinates onto the ground, the coordinate positions are: A(X A , Y A ) and B(X B , Y B );

[0062] Calculate the planar projection distance d 1 between point A and point O. The calculation method of d 1 is as follows:

[0063] First, calculate the planar projection distance d 2 between points A and B. ΔY = Y B - Y A ; ΔX = X B - X A ; Then, calculate the angle between the rod body 1 and the horizontal plane 1 Finally, calculate d 1 = S

[0064] Calculate the quadrant angle R of line AB AB (the acute angle value between line AB and the X-axis),

[0065] Calculate the azimuth angle α of line AB AB ; The calculation method is as follows:

[0066] If ΔX > 0 and ΔY ≥ 0, then α AB = R AB ;

[0067] If ΔX < 0 and ΔY ≥ 0, then α AB = 180° - R AB ;

[0068] If ΔX < 0 and ΔY < 0, then α AB = 180° + R AB ;

[0069] If ΔX > 0 and ΔY < 0, then α AB = 360° - R AB ;

[0070] If ΔX = 0 and ΔY = 0, then α AB is any value;

[0071] If ΔX = 0 and ΔY > 0, then α AB = 90°;

[0072] If ΔX = 0 and ΔY < 0, then α AB = 270°.

[0073] Finally, calculate the coordinates of point O. Substitute the above calculation results into the formula: X O = X B + d 1 cosα AB , Y O = Y B + d 1 sinα AB , and then obtain the coordinates of point O to complete the measurement of the lofting coordinates.

[0074] In the above calculation method, S 2 is obtained by reading the scale on rod 1, that is, it is assumed that there is no deformation in rod 1 itself. When there is deformation in rod 1, S 2 needs to be calculated. The calculation method is: ΔH = H B - H A ; That is, the coordinate layout measurement method of the present application. By setting two prism assemblies 2 on the prism rod, under the condition of setting the distance between the two prism assemblies 2 and the distance between the lower prism assembly 2 and the bottom end of the rod body, the total station is used to observe the coordinates of the two prism assemblies 2, and then the bottom coordinates of the rod body 1 can be directly calculated. In this measurement method, the requirement for the verticality of the prism rod is relatively low, and it is not necessary to frequently adjust the prism rod in cooperation with the spirit level, saving manpower and time, having a faster measurement speed, and being conducive to the efficient progress of construction operations.

[0075] Embodiment 2

[0076] Please refer to Figures 6 - 7 , the difference between this embodiment and Embodiment 1 is that the rod body uses a spliced rod 6, that is, it is composed of a plurality of splicing segments 601 spliced and assembled. One end of the splicing segment 601 is provided with a docking screw port 602, and the other end of the splicing segment 601 is fixedly connected with a docking screw head 603. The combination is realized through the threaded connection between the docking screw head 603 and the docking screw port 602, and the connection of multiple splicing segments 601 is realized in sequence to obtain the spliced rod 6; further, anti-slip threads 604 are provided on one side of each splicing segment 601 close to the docking screw port. On the one hand, the existence of the anti-slip threads 604 facilitates the threaded connection and combination between the two splicing segments 601. On the other hand, the existence of the anti-slip threads 604 can also better indicate the orientation of the end where the docking screw port 602 is located, facilitating the operator to perform the taking and assembling operations.

[0077] When using the rod body of this form, the prism assembly 2 is fixedly set. At this time, the position adjustment of the prism assembly 2 is realized by changing the number of splicing segments 601, that is, by increasing or decreasing the number of splicing segments between the two prism assemblies 2 or between the lower prism assembly 2 and the bottom suspension seat, and adjusting S 1 and S 2 . Therefore, there is no need to set scale lines on each splicing segment 601. Since the position of the prism assembly 2 is fixed and the length of each splicing segment 601 is also fixed, S 1 and S 2 can be calculated according to the number of splicing segments 601, and the subsequent calculation method is the same as that in Embodiment 1

[0078] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the above-disclosed technical content without departing from the technical solution of the present invention. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A prism rod, characterized in that: It comprises a rod body (1) and a tripod for supporting the rod body (1); two prism assemblies (2) are arranged in the middle of the rod body (1); and scale lines are painted on the outer wall of the rod body (1).

2. The prism rod according to claim 1, characterized in that: The prism assembly (2) comprises a sliding sleeve (201), both sides of which are fixedly connected with ear plates (202), a notch portion is provided at the bottom of one side of the ear plate (202), and a locking bolt (203) is rotatably mounted on the inner wall of the notch portion.

3. The prism rod according to claim 1, characterized in that: The tripod comprises a central component (4) and a plurality of supporting legs (5) rotatably connected to the edge of the central component (4); the central component (4) comprises an outer sleeve (402); the outer wall of the outer sleeve (402) is fixedly connected to a plurality of connecting frames (407); one end of the plurality of supporting legs (5) is rotatably connected to the inner walls of the plurality of connecting frames (407), and the other end of the plurality of supporting legs (5) is fixedly connected to a needle seat (504); one end of the needle seat (504).

4. The prism rod according to claim 1, characterized in that: An inner sleeve (401) is arranged inside the outer sleeve (402), a threaded section is provided at the bottom of the inner sleeve (401), a plurality of through grooves are provided in the middle of the threaded section, and the inner walls of the plurality of through grooves are fixedly connected with locking pressure plates (404), one end of the locking pressure plate (404) is inclined toward a side away from the rod body (1), and a pressure pad (408) is fixedly connected to the other side of the locking pressure plate (404), a locking ring (405) is threadedly connected to the bottom of the threaded section, and an adjustment ring (406) is fixedly connected to the bottom of the locking ring (405).

5. The prism rod according to claim 1, characterized in that: The middle part of the outer sleeve is threadedly connected with a plurality of adjusting bolts (403), one end of each of the adjusting bolts (403) is fixedly connected with a ball head (409), and one end of the ball head (409) is hinged with the ball head of the outer wall of the inner sleeve.

6. The prism rod according to claim 1, characterized in that: The supporting foot (5) is divided into an upper rod section (505) rotatably connected to the connecting frame (407) and a lower rod section (506) fixedly connected to the needle seat (504); a linear motor (501) is fixedly installed at the bottom center of the upper rod section (505), and the output end of the linear motor (501) is fixedly connected to the top center of the lower rod section (506); a control switch (507) is fixedly installed at one end of the upper rod section (505) close to the connecting frame (407), and the control switch (507) is electrically connected to the linear motor (501).

7. The prism rod according to claim 1, characterized in that: The end edge of the upper rod section (505) is slidably connected to a plurality of reinforcing rods (503), one end of each of the reinforcing rods (503) is fixedly connected to the top edge of the lower rod section (506), the top outer side wall of the lower rod section (506) is fixedly connected to a dust cover (502), and one end of the dust cover (502) is slidably connected to the upper rod section (505).

8. A method for measuring and laying out coordinates of a prism rod, characterized in that: The following steps are involved: Step 1: Install the prism rod at the measuring point; Step 2: Slide and adjust the positions of the two prism components (2) and fix them. The coordinate of the bottom end of the rod body (1) is O (X O , Y O ) The distance between the prism assembly (2) located at the bottom and the bottom end of the rod body (1) is recorded as S1, and the distance between the two prism assemblies (2) is recorded as S2; Step 3: After setting up the total station, the three-dimensional coordinates A' (X A , Y A , H A )、B'(X B , Y B , H B ), the two three-dimensional coordinates are projected onto the ground and their coordinate positions are: A(X A , Y A ) and B(X B , Y B ), connect point A and point B to get straight line AB; Step 4: Calculate the plane projection distance d1 between point A and point O, and calculate the quadrant angle R of line AB AB , calculate the azimuth α of line AB AB ; Step 5: Calculate the coordinates of point O, where X O =X B +d1cosα AB , Y O =Y B +d1sinα AB .

9. A method for measuring and calculating coordinates of a prism rod according to claim 8, characterized in that: The calculation method of d1 in step 4 is: first calculate the plane projection distance d2 of points AB, ΔY=Y B -Y A ; ΔX=X B -X A ; Angle between the rod (1) and the horizontal plane Finally, calculate d1 = S1cosα; The quadrant angle The azimuth angle α AB The calculation method is: If ΔX>0, ΔY≥0, then α AB =R AB ; If ΔX<0, ΔY≥0, then α AB =180°-R AB ; If ΔX<0, ΔY<0, then α AB =180°+R AB ; If ΔX>0, ΔY<0, then α AB =360°-R AB ; If ΔX=0, ΔY>0, then α AB =90°; If ΔX=0, ΔY<0, then α AB =270°.

10. The prism rod and coordinate layout and calculation method according to claim 9, characterized in that: When the rod (1) is deformed, S2 in step 2 needs to be calculated as follows: ΔH = H B -H A ;

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