CN115787754A - Foundation pit side slope gradient measurement and side slope deformation monitoring device - Google Patents

Abstract

The invention provides a foundation pit slope gradient measurement and slope deformation monitoring device, wherein two upright posts are fixedly installed on the ground at the edge of a foundation pit, the upper ends of the upright posts are connected with a lower base, the top surface of the lower base is movably connected with a horizontal connecting rod fixing block, the upper end of the horizontal connecting rod fixing block is connected with an upper base, the top of the upper base is provided with a computer control system, the horizontal connecting rod fixing block is transversely connected with a horizontal connecting rod, the rotating shafts respectively comprise a rotating shaft C, a rotating shaft A and a rotating shaft B from top to bottom, the upper end of the rotating shaft C is installed in the upper base, the rotating shaft A is installed in the lower base, the rotating shaft C penetrates through the center of the horizontal connecting rod fixing block, the horizontal connecting rod is vertically and fixedly connected with a hollow vertical post, a height adjusting rod is installed in the hollow vertical post, and a GPS receiver is installed at the top of the height adjusting rod.

Description

A foundation pit slope slope measurement and slope deformation monitoring device

technical field

The invention belongs to the technical field of construction engineering measurement, and in particular relates to a slope measurement and side slope deformation monitoring device for foundation pit support engineering.

Background technique

If the excavation of the foundation pit is deep and there are buildings nearby, the foundation pit wall must be used for support, the method of shotcrete retaining wall, and the large foundation pit even adopts the method of underground diaphragm wall and column type bored pile interlocking to protect the outer soil layer from collapsing input; the stability of foundation pit wall support is particularly important, and the stability of foundation pit wall support can be reflected by slope measurement; However, the theodolite is a precision instrument. Long-term carrying bumps will definitely affect the measurement accuracy of the theodolite, and it is more professional in the use process, which is not convenient for most people to use, so that the measurement conditions of the slope slope are too high and difficult to meet General measurement needs, and at the same time, the foundation pit deformation monitoring requires a total station for measurement. If the measurement ground is deformed, the measurement results will be deviated. In order to ensure the slope slope and monitor the slope deformation during the slope construction, a technically more Advanced and feasible equipment ensures the safety of foundation pit construction and reduces construction costs.

The CN217845182U patent proposes a slope measuring device for foundation pit support engineering. The upper end of the support base is connected with a vertical stand, and a set of horizontal carriages is movably connected inside the fixed chute in the middle of the vertical stand. The upper and lower sets of horizontal carriages are respectively plugged with an upper sliding ruler and a lower sliding ruler. The top of the ruler and the lower sliding ruler are connected with a hand-held inclination measuring ruler. The hand-held inclination measuring ruler is composed of a straight beam frame, an arc bracket, a semicircular level, and an angle scale code. The middle and upper ends of the straight beam frame are connected with an arc bracket. , the inside of the arc-shaped bracket is inlaid with a semicircular level, and the surface of the semicircular level is provided with an angle scale code. It uses the hand-held arc level and the vertical measuring frame to carry out double measurement. It can use the hand-held arc level to measure the slope of the foundation pit support slope quickly, and at the same time, use the hand-held arc level and the vertical measuring frame to carry out accurate inclination angle measurement. Based on this, starting from the portability and difficulty of operation and combining the principle of trigonometric functions, in order to solve the above problems, it is of great significance to provide a foundation pit slope slope measurement and slope deformation monitoring device for foundation pit construction.

Contents of the invention

The purpose of the present invention is to provide a foundation pit slope slope measurement and slope deformation monitoring device to solve the above-mentioned problems in the prior art. It can not only perform accurate measurement and is easy to disassemble, save construction time and cost, but also improve construction efficiency. , and finally can ensure the stability and safety of the slope during the construction process.

In order to achieve the above object, the present invention provides the following scheme: a foundation pit slope slope measurement and slope deformation monitoring device includes foundation pit, foundation pit slope, ground, measurement receiving plate, support column, observation station, horizontal connection Rod, the measurement receiving plate includes a receiving plate fixing seat, a connecting rod A, a receiving plate base, a scale plate, a cross wire, a safety zone, a warning zone, a scale, an alarm zone, and a monitoring point; the supporting column includes a column , lower base, rotating shaft A, rotating shaft B, rotating shaft C, horizontal connecting rod fixed block, upper base, computer control system, roller, motor, rotating shaft gear, motor gear, motor rotating shaft, the observation station Including hollow vertical column, fixed screw A, fixed screw B, horizontal circular hole, height adjustment rod, circular scale plate, pointer, rotating shaft, scale, GPS receiver, laser transmitter, fixed installation on the ground at the edge of the foundation pit Column, the upper end of the column is connected with the lower base, the top surface of the lower base is movably connected with the fixed block of the horizontal connecting rod, the upper end of the fixed block of the horizontal connecting rod is connected with the upper base, the computer control system is installed on the top of the upper base, and the fixed block of the horizontal connecting rod Horizontal connecting rods are connected horizontally. The rotating shafts are respectively rotating shaft C, rotating shaft A and rotating shaft B from top to bottom. It runs through the center of the fixed block of the horizontal connecting rod, the rotating shaft A and the rotating shaft B are installed in the lower base and the roller is installed at the center of the bottom of the rotating shaft B, and the rotating shaft B is welded with the rotating shaft gear in the circumferential direction, and the rotating shaft gear and the motor gear work together , the vertical center of the motor gear is provided with a motor shaft, the motor shaft is connected to the motor, the hollow vertical column penetrates the horizontal connecting rod and is vertically fixedly connected, the height adjustment rod is movable installed in the hollow vertical column, and the hollow vertical column is vertically provided with two Two horizontal round holes, fixed screw A and fixed screw B are respectively installed in the two horizontal round holes, the GPS receiver is installed on the top of the height adjustment rod, the vertical middle position of the height adjustment rod is a groove, and a circular scale plate and a circular scale plate are installed in the groove. Pointer, the receiving plate fixing seat is connected to the receiving plate base through the connecting rod A, the side of the receiving plate base is a scale plate, the center point of the crosshair coincides with the center of the scale plate, and the center of the scale plate is from the inside to the outside. Area, alarm area, a scale is set in the warning area, and the receiving plate fixing seat is aligned with the pointer side to set the monitoring point.

As a further solution of the present invention: the receiving plate fixing seat is installed obliquely, the inclination angle is consistent with the slope of the foundation pit slope, the monitoring point is set at the receiving plate fixing seat and the foundation pit side slope slope, and the monitoring point is connected with the laser transmitter on the same straight line.

As a further solution of the present invention: the scale plate is a circular plate, a crosshair is set at the center of the circular plate, the first circular area is a safety zone, and the area between the first circle and the second circle is The area between the warning area, the second circle and the third circle is the alarm area, and a scale is set in the safety area and the warning area.

As a further solution of the present invention: the cross section of the rotating shaft C in the upper base and the horizontal connecting rod fixing block is hexagonal, and the cross section of the rotating shaft A and rotating shaft B in the lower base is circular.

As a further solution of the present invention: the setting position of the horizontal circular hole is determined by the slope of the foundation pit slope, the height adjustment rod, the distance between the receiving plate base and the rotating shaft through trigonometric calculation, and the center of the rotating shaft when the fixing screw A is tightened The point is on the same plane as the monitoring point; when the fixed screw B is tightened, the center point of the rotating shaft is on the same plane as the crosshair on the measuring receiving plate.

As a further solution of the present invention: the vertical middle position of the height adjustment rod is a groove, the outer side of the bottom surface of the groove is a circular scale plate, the outer side of the circular scale plate is a pointer, and a laser emitter is installed at the end of the pointer. The scale plate is connected with the height adjustment rod through a rotating shaft. The axial centerline of the pointer is vertically on the same plane as the center of the GPS receiver.

Beneficial effect.

The invention discloses the following technical effects: a foundation pit slope slope measurement and slope deformation monitoring device, a column is fixedly installed on the ground at the edge of the foundation pit, the upper end of the column is connected with a lower base, and the top surface of the lower base is fixed to a horizontal connecting rod The blocks are connected flexibly, the upper end of the horizontal connecting rod fixed block is connected with the upper base, and the computer control system is installed on the top of the upper base, and the horizontal connecting rod fixed block is connected with the horizontal connecting rod horizontally. Axis A, rotation axis B, the upper end of rotation axis C is installed in the upper base, rotation axis A is installed in the lower base, rotation axis C runs through the center of the horizontal connecting rod fixed block, and the horizontal connecting rod is vertically fixedly connected with the hollow vertical column , a height adjustment rod is installed in the hollow vertical column, and a GPS receiver is installed on the top of the height adjustment rod. Slope deformation monitoring ensures the safety of foundation pit construction, and the device can be reused.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without any creative work.

Figure 1 is a top view of a foundation pit slope measurement and slope deformation monitoring device.

Fig. 2 is a side view of a foundation pit slope slope measuring device.

Fig. 3 is a side view of a detection device for foundation pit slope deformation.

Figure 4 is the front view of the measurement receiver board.

Figure 5 is a side view of the measurement receiving board.

Figure 6 is a top view of the measurement receiving board.

Figure 7 is an enlarged view of the scale plate.

Figure 8 is the front view of the observation station.

Figure 9 is a side view of the observation station.

Fig. 10 is a top view of section A-A in Fig. 8 .

Figure 11 is a front view of the support column.

Figure 12 is a side view of the support column.

Figure 13 is a top view of the support column.

FIG. 14 is a partial enlarged view of B in FIG. 11 .

Foundation pit 1, foundation pit slope 2, ground 3, measurement receiving plate 4, support column 5, observation station 6, horizontal connecting rod 7, receiving plate fixing seat 8, connecting rod A9, receiving plate base 10, scale plate 11. Crosshair 111, safety zone 112, warning zone 113, scale 114, alarm zone 115, monitoring point 12, column 13, lower base 14, rotation axis A151, rotation axis B152, rotation axis C153, horizontal connecting rod fixation Block 16, upper base 17, computer control system 18, roller 19, motor 20, rotating shaft gear 21, motor gear 22, motor rotating shaft 23, hollow vertical column 24, fixed screw A25, fixed screw B26, horizontal circular hole 27. Height adjustment rod 28, circular scale plate 29, pointer 30, rotating shaft 31, scale 32, GPS receiver 33, laser transmitter 34.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Fig. 1-Fig. 14, the present invention provides a foundation pit slope slope measurement and slope deformation monitoring device including foundation pit 1, foundation pit slope 2, ground 3, measurement receiving plate 4, support column 5, Observation station 6, horizontal connecting rod 7, the measurement receiving board 4 includes receiving board fixing seat 8, connecting rod A9, receiving board base 10, scale plate 11, cross wire 111, safety zone 112, warning zone 113, scale Ruler 114, alarm zone 115, monitoring point 12; the support column includes column 13, lower base 14, rotating shaft A151, rotating shaft B152, rotating shaft C153, horizontal connecting rod fixing block 16, upper base 17, computer control System 18, roller 19, motor 20, rotating shaft gear 21, motor gear 22, motor shaft 23, the observation station includes a hollow vertical column 24, a fixed screw A25, a fixed screw B26, a horizontal circular hole 27, and a height adjustment rod 28. A circular scale plate 29, a pointer 30, a rotating shaft 31, a scale 32, a GPS receiver 33, and a laser transmitter 34. A column 13 is fixedly installed on the ground 3 at the edge of the foundation pit 1, and the upper end of the column 13 is connected with a lower base 14 , the top surface of the lower base 14 is flexibly connected with the horizontal connecting rod fixed block 16, the upper end of the horizontal connecting rod fixed block 16 is connected with the upper base 17, the computer control system 18 is installed on the top of the upper base 17, and the horizontal connecting rod fixed block 16 is connected horizontally There is a horizontal connecting rod 7, and the rotating shafts are respectively rotating shaft C153, rotating shaft A151, and rotating shaft B152 from top to bottom. C153 runs through the center of the horizontal connecting rod fixing block 16, the rotating shaft A151 and the rotating shaft B152 are installed in the lower base 14 and the roller 19 is installed at the bottom center of the rotating shaft B152, and the rotating shaft gear 21 is welded circumferentially on the rotating shaft B152, and the rotating shaft gear 21 cooperates with the motor gear 22, the motor gear 22 is vertically centered with a motor shaft 23, the motor shaft 23 is connected to the motor 20, the hollow vertical column 24 penetrates the horizontal connecting rod 7 and is vertically fixedly connected, and the hollow vertical column 24 The height adjustment rod 28 is installed movable, and the hollow vertical column 24 is vertically provided with two horizontal round holes 27, and the fixed screw rod A25 and the fixed screw rod B26 are respectively installed in the two horizontal round holes 27, and the GPS receiver 33 is installed on the top of the height adjustment rod 28, The vertical middle position of the height adjustment rod 28 is a groove, and a circular scale plate 29 and a pointer 30 are installed in the groove. The receiving plate fixing seat 8 is connected with the receiving plate base 10 through the connecting rod A9, and the side of the receiving plate base 10 It is the scale plate 11, the center point of the cross wire 111 coincides with the center of the scale plate 11, and the circle center of the scale plate 11 is respectively a safety zone 112, a warning zone 113, and an alarm zone 115 from the inside to the outside. The seat 8 is aligned with the pointer 30 side to set the monitoring point 12 .

The receiving plate fixing seat 8 is obliquely installed, and the inclination angle is consistent with the slope of the foundation pit slope 2. The monitoring point 12 is arranged at the receiving plate fixing seat 8 and the slope of the foundation pit side slope 2. The monitoring point 12 is connected to the laser transmitter 34 on the same straight line.

The scale plate 11 is a circular plate, the center of the circular plate is provided with a cross wire 111, the first circular area is a safety zone 112, the area between the first circle and the second circle is a warning zone 113, The area between the second circle and the third circle is an alarm zone 115 , and a scale 114 is set in the safety zone 112 and the warning zone 113 .

The rotating shaft C153 has a hexagonal cross section in the upper base 17 and the horizontal connecting rod fixing block 16 , and the rotating shaft A151 and the rotating shaft B152 have a circular cross section in the lower base 14 .

The setting position of the horizontal circular hole 27 is determined by trigonometric function calculation of the slope of the foundation pit slope 2, the height adjustment rod 28, the distance between the receiving plate base 10 and the rotating shaft 31, and the center point of the rotating shaft 31 when the fixing screw A25 is tightened It is on the same plane as the monitoring point 12 ; when the fixing screw B26 is tightened, the center point of the rotating shaft 31 is on the same plane as the crosshair 111 of the measuring receiving plate 4 .

The vertical middle position of the height adjusting rod 28 is a groove, the outer side of the bottom surface of the groove is a circular scale plate 29, the outer side of the circular scale plate 29 is a pointer 30, and a laser emitter 34 is installed at the end of the pointer 30. The scale plate 29 is connected with the height adjustment rod 28 through a rotating shaft 31 . The axial centerline of the pointer 30 is vertically on the same plane as the center of the GPS receiver 33 .

] Example.

Before the construction, the column 13, the lower base 14, the rotating shaft A151, the rotating shaft B152 and the rotating shaft C153 are first installed as a whole, and according to the slope of the foundation pit side slope 2 and the height from the center point of the rotating shaft 31 to the bottom surface of the lower base 14, after The trigonometric function calculates the height of the column 13 to ensure that the center point of the rotating shaft 31 and the center point of the monitoring point 12 are on the same plane.

Before the foundation pit 1 is excavated, carry out construction lofting according to the slope of the foundation pit side slope 2, release the ground excavation size, and then excavate the pit groove at a certain distance from the ground 3 outside the excavation point on the edge of the foundation pit 1, and then place the column 13 perpendicular to the ground Bury it in the pit and pour concrete to fix it.

After the concrete strength reaches 75% of the design strength, install the rotating shaft A151, rotating shaft B152 and rotating shaft C153 into the horizontal connecting rod fixing block 16 and the upper base 17 to ensure that the roller 19 is aligned with the designed position; install the horizontal connecting rod 7 and observation station 6; Fixed screw rod A25, fixed screw rod B26 are fixed, and the monitoring coordinate of monitoring point is set in computer control system 18 simultaneously, open GPS receiver 33 and motor 20, motor rotation drives motor gear 22 to rotate, and motor gear 22 rotates to drive the rotating shaft gear 21 to rotate, and the rotating shaft gear 21 rotates and simultaneously drives the rotating shaft B152, the rotating shaft A151, and the rotating shaft C153 to rotate through the roller 19, and simultaneously drives the horizontal connecting rod fixing block 16, the horizontal connecting rod 7 and the observation station 6 Rotate, when the coordinate of GPS receiver 33 reaches monitoring coordinate, motor 20 stops working, then pointer 30, scale 32, GPS receiver 33, laser transmitter 34 are checked.

The foundation pit 1 is excavated on a slope. With the continuous excavation of the foundation pit 1, a pit groove is excavated on the side slope 2 of the foundation pit, and the receiving plate fixing seat 8 is buried in the pit groove vertically to the side slope 2 of the foundation pit. The laser is emitted by the laser transmitter 34 to align with the monitoring point 12, the receiving plate fixing seat 8 is fixed with concrete, and the laser is emitted by the laser transmitter 34 to align with all buried monitoring points 12 for monitoring the excavation slope of the slope.

With the continuous excavation of the foundation pit 1, it is necessary to monitor the deformation of the foundation pit slope 2. At this time, the position of the height adjustment rod 28 needs to be adjusted, and the fixing screw B26 is fixed. At this time, the rotating shaft 31 and the cross wire 111 are on the same plane Above, when the foundation pit slope 2 is displaced, the laser point emitted by the laser transmitter 34 will deviate from the dot of the crosshair 111. If the laser point falls within the safety zone 112, it means that the monitoring point of the foundation pit slope 2 is in a safe position. state, when the laser point falls in the warning area 113, the displacement of the slope can be known through the coordinates of the scale and reminds that slope treatment should be carried out. State of emergency and reminder to stop construction.

Compared with related technologies, the present invention provides a foundation pit slope slope measurement and slope deformation monitoring device. A column is fixedly installed on the ground at the edge of the foundation pit. The upper end of the column is connected to a lower base, and the top surface of the lower base is connected to the horizontal The fixed block of the rod is connected flexibly, the upper end of the fixed block of the horizontal connecting rod is connected with the upper base, and the computer control system is installed on the top of the upper base, the fixed block of the horizontal connecting rod is connected horizontally with the horizontal connecting rod, and the rotating shafts from top to bottom are respectively the rotating shaft C , Rotation axis A, rotation axis B, the upper end of the rotation axis C is installed in the upper base, the rotation axis A is installed in the lower base, the rotation axis C runs through the center of the horizontal connecting rod fixed block, and the horizontal connecting rod is perpendicular to the hollow vertical column Fixed connection, a height adjustment rod is installed inside the hollow vertical column, and a GPS receiver is installed on the top of the height adjustment rod. Slope deformation monitoring can be carried out to ensure the safety of foundation pit construction, and the device can be reused.

Claims (6)

1. A foundation pit slope gradient measurement and slope deformation monitoring device is characterized by comprising a foundation pit (1), a foundation pit slope (2), a ground (3), a measurement receiving plate (4), a support column (5), an observation station (6) and a horizontal connecting rod (7), wherein the measurement receiving plate (4) comprises a receiving plate fixing seat (8), a connecting rod A (9), a receiving plate base (10), a scale plate (11), a cross wire (111), a safety zone (112), a warning zone (113), a graduated scale (114), an alarm zone (115) and a monitoring point (12); the support column includes stand (13), lower base (14), axis of rotation A (151), axis of rotation B (152), axis of rotation C (153), horizontal connecting rod fixed block (16), go up base (17), computer control system (18), roller bearing (19), motor (20), axis of rotation gear (21), motor gear (22), motor shaft (23), the observation station includes hollow vertical post (24), clamping screw A (25), clamping screw B (26), horizontal round hole (27), height control pole (28), circular scale board (29), pointer (30), pivot (31), scale (32), GPS receiver (33), laser emitter (34), fixed mounting stand (13) on foundation ditch (1) marginal ground (3), stand (13) upper end is connected with lower base (14), lower base (14) top surface and horizontal connecting rod fixed block (16) swing joint, horizontal connecting rod fixed block (16) upper end is connected with upper base (17), upper base (17) top installation computer control system (18), horizontal connecting rod (16) horizontally connect with horizontal connecting rod (7), axis of rotation C (153), axis of rotation A (153) respectively, top-down (151), top-down (23), top-down, A rotating shaft B (152), the top of the rotating shaft C (153) is arranged in an upper base (17), a roller (19) is arranged at the center of the top of the rotating shaft C (153), the rotating shaft C (153) penetrates through the center of a horizontal connecting rod fixing block (16), the rotating shaft A (151), the rotating shaft B (152) is arranged in a lower base (14), the roller (19) is arranged at the center of the bottom of the rotating shaft B (152), a rotating shaft gear (21) is welded on the circumference of the rotating shaft B (152), the rotating shaft gear (21) is matched with a motor gear (22) to work, a motor rotating shaft (23) is arranged at the vertical center of the motor gear (22), the motor rotating shaft (23) is connected with a motor (20), a hollow vertical column (24) penetrates through a horizontal connecting rod (7) to be vertically and fixedly connected, a height adjusting rod (28) is movably arranged in the hollow vertical column (24), two horizontal round holes (27) are vertically arranged in the hollow vertical column (24), a fixing screw rod A (25) and a fixing screw B (26) are respectively arranged in the two horizontal round holes (27), a GPS receiver (33) is arranged at the top of the height adjusting rod (28), a vertical height adjusting rod (28), a groove is arranged in a connecting rod (29), a connecting rod receiving plate is connected with a circular base (10) and a receiving plate (10), the side surface of the receiving plate base (10) is provided with a scale plate (11), the center point of the cross wire (111) is coincided with the circle center of the scale plate (11), the circle center of the scale plate (11) is respectively provided with a safety zone (112), a warning zone (113) and an alarm zone (115) from inside to outside, a graduated scale (114) is arranged in the warning zone (113), and a monitoring point (12) is arranged on the side of a receiving plate fixing seat (8) aligning to a pointer (30).

2. The foundation pit slope gradient measurement and slope deformation monitoring device according to claim 1, characterized in that the receiving plate fixing base (8) is installed in an inclined manner, the inclination angle is consistent with the slope of the foundation pit slope (2), the monitoring point (12) is arranged at the slope surface of the receiving plate fixing base (8) and the foundation pit slope (2), and the monitoring point (12) and the laser transmitter (34) are positioned on the same straight line.

3. The foundation pit slope gradient measurement and slope deformation monitoring device according to claim 1, wherein the scale plate (11) is a circular plate, a cross wire (111) is arranged at the center of the circular plate, the first circular area is a safety area (112), the area between the first circular area and the second circular area is a warning area (113), the area between the second circular area and the third circular area is a warning area (115), and scales (114) are arranged in the safety area (112) and the warning area (113).

4. The foundation pit slope gradient measurement and slope deformation monitoring device as claimed in claim 1, wherein the rotating shaft C (153) is hexagonal in inner section in the upper base (17) and the horizontal connecting rod fixing block (16), and the rotating shaft A (151) and the rotating shaft B (152) are circular in inner section in the lower base (14).

5. The foundation pit slope gradient measurement and slope deformation monitoring device according to claim 1, wherein the arrangement position of the horizontal round hole (27) is determined by the gradient of the foundation pit slope (2), a height adjusting rod (28), the distance between a receiving plate base (10) and a rotating shaft (31) through trigonometric function calculation, and the central point of the rotating shaft (31) and a monitoring point (12) are positioned on the same plane when a fixing screw A (25) is screwed down; when the fixing screw B (26) is screwed, the central point of the rotating shaft (31) and the cross wire (111) of the measuring receiving plate (4) are positioned on the same plane.

6. The foundation pit slope gradient measuring and slope deformation monitoring device as claimed in claim 1, wherein a groove is formed in the vertical middle position of the height adjusting rod (28), a circular scale plate (29) is arranged on the outer side of the bottom surface of the groove, a pointer (30) is arranged on the outer side of the circular scale plate (29), a laser transmitter (34) is mounted at the end portion of the pointer (30), the pointer (30) and the circular scale plate (29) are connected with the height adjusting rod (28) through a rotating shaft (31), and the axial center line of the pointer (30) and the center of the GPS receiver (33) are vertically located on the same plane.

Images