Rotatably propelled inclinometer

Abstract

The invention relates to a rotary propulsion inclinometer, which is used for monitoring the angle of a bent pipeline, and comprises a probe part, an inclinometer part and a control part, and is characterized in that the probe part comprises a rotary propulsion head arranged at one end of a spiral steel wire jacket and an inclinometer probe fixedly arranged in the spiral steel wire jacket; the control part comprises a processing circuit board with a controller, and the processing circuit board is electrically connected with the inclinometer probe through a signal cable; the driving part comprises a motor electrically connected with the processing circuit board, a spiral steel wire storage box which is in transmission connection with the motor through a transmission piece and is used for storing the spiral steel wire jacket, and a conveying sleeve which is provided with a thread matched with the spiral steel wire jacket on the inner side and is fixedly arranged. Compared with the prior art, the method has the advantages of wide applicability, convenience in operation and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of inclinometers, and in particular to a rotary-propelled inclinometer. Background Art

[0002] The current inclinometer usually uses a hard rod-shaped probe, which is connected to a data acquisition device via a cable. The probe contains an inclinometer, which can measure the inclination angle of a section of the pipeline. When in use, it is necessary to rely on the gravity of the probe itself. The probe and the cable behind it fall to the bottom of the pipeline to be measured, and then pull it out section by section. Every time a section is pulled out, the inclination data is collected once through the data acquisition device connected to the cable. After the probe is completely pulled out, the inclination data of each section are summarized and graphed to obtain the overall inclination of the pipeline.

[0003] However, existing inclinometers still have shortcomings. First, they rely on the probe's own gravity to be placed into the pipeline. If the pipeline has a large curvature, the probe cannot sink by its own gravity alone. Second, the inclinometer has certain requirements for the smoothness of the pipeline wall. If the pipeline wall is attached with debris or even partially blocked, the gravity of the probe will not be enough to break through the resistance and continue to sink, resulting in measurement failure. Summary of the invention

[0004] In order to solve the technical problems in the background technology, the present invention provides a rotary propulsion inclinometer for realizing angle monitoring of a curved pipeline, the inclinometer comprising:

[0005] Probe part: including a rotating propulsion head arranged at one end of the spiral steel wire jacket and an inclinometer probe fixedly arranged in the spiral steel wire jacket;

[0006] Control part: including a processing circuit board with a controller, wherein the processing circuit board is electrically connected to the inclinometer probe through a signal cable;

[0007] The driving part includes a motor electrically connected to the processing circuit board, a spiral steel wire storage box which is connected to the motor through a transmission member and is used to store the spiral steel wire jacket, and a transmission sleeve which has a thread on the inner side that matches the spiral steel wire jacket and is fixedly arranged.

[0008] Furthermore, the rotary propulsion head is integrally formed at one end of the spiral steel wire jacket, or is installed at one end of the spiral steel wire jacket.

[0009] Furthermore, the overall shape of the rotary propulsion head is shuttle-shaped, ellipsoidal, semi-ellipsoidal, truncated cone, cone or tubular, and the maximum diameter of the outer surface of the rotary propulsion head is larger than the diameter of the spiral steel wire jacket on the outside of the inclinometer probe and smaller than the minimum inner diameter of the pipe wall to be measured.

[0010] Furthermore, the other end of the spiral steel wire jacket passes through the transmission sleeve and is wound and stored in the spiral steel wire storage box and fixed at the wire outlet at the bottom of the spiral steel wire storage box.

[0011] Furthermore, the inclinometer probe includes a hard pipe of a set length and an inclination sensor arranged in the hard pipe for measuring the inclination angle within the length of the inclinometer probe. One end of the signal cable is connected to the inclination sensor, and the other end is connected to the processing circuit board through a conductive slip ring after passing through the other end of the spiral steel wire jacket.

[0012] Furthermore, the transmission member includes a driving gear connected to the transmission shaft of the motor and a driven gear meshing with the driving gear, the driven gear is fixedly connected to the spiral wire storage box, and the driven gear is connected to the transmission sleeve through a bearing.

[0013] Furthermore, the inclinometer also includes a length measuring part, which includes a length measuring gear and a rotary encoder arranged on the rotating shaft of the length measuring gear. The length measuring gear is in contact with the spiral steel wire jacket and rotates with the expansion and contraction of the spiral steel wire jacket. The rotary encoder is connected to the processing circuit board.

[0014] Furthermore, the motor is fixedly installed in a movable bracket with casters, and a dust removal brush is provided on the outside of the spiral steel wire jacket.

[0015] Furthermore, the length of the inclinometer probe during actual measurement is determined by the inner diameter and bending condition of the curved pipe to be measured, and then:

[0016]

[0017] Wherein, L0 is the length of the inclinometer probe during actual measurement, d is the inner diameter of the curved pipe to be measured, and R is the minimum bending radius of the curved pipe to be measured.

[0018] Furthermore, the inclinometer measures the inclination of the curved pipe to be measured, including:

[0019] 1) Arrange the inclinometer at the curved pipe to be tested, and extend the inclinometer probe into the curved pipe to be tested;

[0020] 2) The processing circuit board controls the motor to rotate forward, driving the spiral wire jacket to rotate forward so that the inclinometer probe is pushed to the deepest part of the curved pipe to be measured;

[0021] 3) Temporarily turn off the motor to wait for the inclinometer probe to stabilize, and then the processing circuit board reads the inclination data α1 output by the inclination sensor at this time;

[0022] 4) The processing circuit board controls the motor to rotate in the reverse direction, driving the spiral wire jacket to rotate in the reverse direction to make the inclinometer probe retreat to a set length, that is, the length of the inclinometer probe during actual measurement;

[0023] 5) Temporarily turn off the motor to wait for the inclinometer probe to stabilize, and then the processing circuit board reads the inclination data α2 output by the inclination sensor at this time;

[0024] 6) Repeat steps 4) and 5) to obtain the inclination data corresponding to each set length section in the pipeline to be tested in sections, and draw a data map of the entire curved pipeline to be tested based on all the section lengths and angle data.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] The present invention provides a rotary-propelled inclinometer, which can adapt to the measurement of inclination data of curved pipes with different bending conditions and different inner diameters. The inclinometer probe can be smoothly inserted into the deepest part of the curved pipe to be measured through its own drive, and the inclination angle corresponding to each segment length is measured in turn according to the set segment length, and the inclination measurement of all curved pipes is finally completed. In addition, the present invention has a relatively simple structure, low cost, and high promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the probe part of the inclinometer of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the rotation drive and data acquisition part of the inclinometer of the present invention;

[0029] Figure 3 The figure is a schematic diagram of the measurement process of the inclinometer of the present invention.

[0030] Figure 4 It is a schematic diagram of the calculation relationship between the maximum length of the inclinometer of the present invention and the minimum bending radius and the minimum inner diameter of the curved pipeline.

[0031] Description of reference numerals:

[0032] 1. Rotating propulsion head, 2. Inclinometer probe, 3. Signal cable, 4. Spiral wire jacket, 5. Length measuring gear, 6. Rotary encoder, 7. Spiral wire storage box, 8. Driving gear, 9. Driven gear, 10. Transmission sleeve, 11. Processing circuit board, 12. Conductive slip ring, 13. Dust removal brush, 14. Motor, 15. Bracket. DETAILED DESCRIPTION

[0033] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0034] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0035] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0037] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0038] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] Example

[0040] The present invention provides a rotary propulsion inclinometer. A new inclinometer solution is proposed based on the inclinometer principle of the existing inclinometer. The probe part, the cable part, and the cable and signal acquisition system are improved so that the inclinometer probe part has the function of rotary propulsion, thereby adapting to the situation of curved pipelines and debris blockage. The rotary propulsion inclinometer of the present invention includes the following parts:

[0041] 1. Probe part

[0042] The structure of the probe part is as follows Figure 1As shown, the probe part is composed of a rotating propulsion head 1, an inclinometer probe 2, a signal cable 3 connected at one end to the tail of the inclinometer probe 2, and a spiral steel wire jacket 4 (the front section is shown in the figure). The inclinometer probe 2 is arranged in the hollow spiral steel wire jacket 4, and the head of the spiral steel wire jacket 4 is integrally formed with the rotating propulsion head 1. The rotating propulsion head 1 can also be added at one end of the spiral steel wire jacket 4.

[0043] In this embodiment, a simple implementation scheme of the rotary propulsion head 1 can be a section of spiral steel wire, or other forms of rotary propulsion heads can be used. The rotary propulsion head 1 is shuttle-shaped as a whole, and can also be ellipsoidal, semi-ellipsoidal, truncated cone, cone, tubular, etc. The maximum diameter of the outer surface of the rotary propulsion head 1 is larger than the diameter of the inclinometer probe 2 plus the spiral steel wire jacket 4, and smaller than the minimum inner diameter of the pipe wall to be measured, so that the interior of the spiral steel wire jacket 4 can accommodate the inclinometer probe 2, and the rotary propulsion head 1 can extend into the pipe wall to be measured.

[0044] The inclinometer probe 2 is specifically a section of hard steel pipe (or other hard materials), and the cross-section can be circular or square. An inclination sensor is provided inside the steel pipe to measure the corresponding inclination angle within the length range of the inclinometer probe 2. In addition, in order to facilitate the advancement of the inclinometer probe 2 in the pipeline, the length of the inclinometer probe 2 must be smaller than the minimum bending radius of the pipeline to be tested. If the pipeline bending radius is small, it is necessary to adjust the length of the inclinometer probe 2 to adapt to the pipeline to be tested. The shorter the length of the inclinometer, the shorter the test collection interval, the denser the data, and the longer the test cycle, so it needs to be considered comprehensively.

[0045] The spiral steel wire jacket 4 is wound around the outside of the inclinometer probe 2 and the signal cable 3 , which can not only protect the inclinometer probe 2 and the signal cable 3 , but also transmit the rotational force to the rotary propulsion head 1 .

[0046] The inclinometer probe 2 is arranged in the spiral steel wire jacket 4 and close to one end of the rotating propulsion head 1, and can make axial rotation synchronously with the spiral steel wire jacket 4. The total length of the signal cable 3 and the spiral steel wire jacket 4 is determined according to the length of the pipeline to be measured, which is usually much longer than the inclinometer probe 2 itself and can be bent freely.

[0047] 2. Rotation drive and data acquisition part

[0048] The components of the rotation drive and data acquisition parts are as follows: Figure 2As shown, it consists of a spiral wire jacket 4 (the part except the front section is shown in the figure), a length measuring gear 5, a rotary encoder 6, a driving gear 8, a driven gear 9, a transmission sleeve 10 with an inner thread, a spiral wire storage box 7, a conductive slip ring 12, a processing circuit board 11, a motor 14, a movable bracket 15 and a dust removal brush 13, wherein the length measuring gear 5, the rotary encoder 6, the driving gear 8, the driven gear 9, the transmission sleeve 10 with an inner thread, the spiral wire storage box 7, the conductive slip ring 12, the processing circuit board 11 and the dust removal brush 13 can be jointly arranged in a shell (not shown in the figure) arranged on the bracket 15.

[0049] The signal cable 3 of the inclinometer is always arranged in the hollow spiral steel wire jacket 4, and the spiral steel wire jacket 4 plays the role of protecting the signal cable 3; when the cable 3 and the spiral steel wire 4 are not in use, they are wound and stored in the spiral steel wire storage box 7, and the tail of the spiral steel wire jacket 4 is fixed at the bottom outlet of the spiral steel wire storage box 7 ( Figure 2 The signal cable 3 extends out through the bottom outlet of the spiral wire storage box 7 and is electrically connected to the rotating end of the conductive slip ring 12. The fixed end of the conductive slip ring 12 is electrically connected to the circuit board 11 to transmit the output angle signal of the inclination sensor. The circuit board 11 is also connected to the signal line of the rotary encoder 6 and the drive signal line of the motor 14 through a cable.

[0050] A motor 14 is fixedly installed inside the mobile bracket 15, and a plurality of casters are provided at the bottom for easy movement. The driving gear 8 is fixedly sleeved on the transmission shaft of the motor 14 and meshes with the driven gear 9. The driven gear 9 is fixedly connected to the spiral wire storage box 7 and rotates synchronously. The transmission sleeve 10 is fixed on the shell and cannot rotate itself. The transmission sleeve 10 is connected to the driven gear 9 through a bearing.

[0051] It can be known that the present invention can not only realize rotational drive transmission by means of the motor 14 cooperating with the driving gear 8 and the driven gear 9, but can also be realized by other known drive transmission methods, which will not be described in detail here.

[0052] The length measuring gear 5 is installed inside the shell through the rotating shaft, and the rotary encoder 6 is installed on the rotating shaft. The teeth of the length measuring gear 5 are in contact with the spiral steel wire 4. When the spiral steel wire 4 rotates to achieve advancement or retraction, the rotating shaft rotates synchronously by driving the length measuring gear 5, and then the advancement or retraction length of the spiral steel wire 4 is measured by the rotary encoder 6.

[0053] Before use, first move the mobile bracket 1 to a suitable position, and drive the motor 14 through the circuit board 11 to rotate the driving gear 8 and the driven gear 9. Since the driven gear 9 and the spiral wire storage box 7 are rigidly connected, the rotation of the driven gear 9 will also drive the spiral wire storage box 7 to rotate synchronously. The rotation of the spiral wire storage box 7 can drive the spiral wire 4 to rotate axially, and then drive Figure 1 The rotating propulsion head 1 in the pipeline is advanced or recovered, the transmission sleeve 10 has spiral teeth inside, and the spiral wire jacket 4 can provide a forward thrust or a backward pulling force when the spiral is rotating.

[0054] The rotation of the spiral wire storage box 7 will cause the signal cable 3 in the spiral wire jacket 4 to rotate synchronously, so a conductive slip ring 12 is required to rotatably connect one end of the signal cable 3 to a fixed circuit board 11, and the other end of the signal cable 3 is connected to the inclination sensor, so that the circuit board 11 can also receive and process the angle measurement data output by the inclination sensor when the signal cable 3 rotates.

[0055] When the motor 14 drives the spiral steel wire jacket 4 to advance or retract by rotating, in order to measure the length of advancement or retraction, a toothed length measuring gear 5 is provided in contact with the outer surface of the spiral steel wire jacket 4, and a rotary encoder 6 is connected to the rotating shaft of the length measuring gear 5. The rotary encoder 6 can calculate the length information of the advancement or retraction of the spiral steel wire 4 by measuring the rotation angle multiplied by the diameter of the length measuring gear 5, and transmit the length information of the advancement or retraction of the spiral steel wire 4 through the signal line to the circuit board 11 for unified collection and processing. The teeth of the length measuring gear 5 are intended to prevent the spiral steel wire jacket 4 from slipping due to rotational vibration during the transmission process, thereby providing more accurate length information.

[0056] In order to prevent the debris attached to the spiral steel wire jacket 4 in the pipeline from affecting the length measuring gear 6 and the transmission sleeve 10, the present invention also arranges a pair of dust removal brushes 13 at a position between the rotating propulsion head 1 and the length measuring gear 5 inside the shell. The dust removal brushes 13 are in close contact with the outer surface of the spiral steel wire jacket 4 to clean the dust and foreign matter on the spiral steel wire jacket 4. In addition, lubricating oil can also be applied to the spiral steel wire jacket 4 to make the spiral steel wire jacket 4 rotate smoothly.

[0057] The measurement process of the rotary propulsion inclinometer provided by the present invention is as follows:

[0058] The measurement process is as follows Figure 3As shown, first, the circuit board 11 drives the motor 14, so that the rotating propulsion head 1 at the outer end of the spiral wire jacket 4 drives the inclinometer probe 2 and the signal cable 3 to extend into the deepest part of the pipeline to be measured, and the motor 14 is turned off. After waiting for the set time to stabilize (usually a few seconds), the inclination data α1 output by the inclination sensor is read; then the motor 14 is driven to reverse and pull back a set distance, the motor 14 is paused, and after waiting for the set time to stabilize (usually a few seconds), the inclination data α2 output by the inclination sensor is read, and then the motor 14 is driven to reverse and pull back a set distance. The set distance is the length of the inclinometer probe 2 during actual measurement, and so on. In this way, the length and inclination data of each location in the pipeline can be measured in sections, and finally all the data are collected to draw a length and angle data diagram inside the entire curved pipeline.

[0059] Inclinometer probe length selection

[0060] Because the pipeline environment in which the inclinometer provided by the present invention is applied is a curved pipeline rather than a straight pipeline, in order to ensure that the spiral wire jacket 4 and the inclinometer probe 2 can smoothly extend into various places of the curved pipeline, the calculation relationship between the maximum length of the inclinometer probe 2 and the minimum bending radius and the minimum inner diameter of the curved pipeline is as follows: Figure 4 shown.

[0061] Assume that L is the theoretical calculated length of the inclinometer probe 2, d is the minimum inner diameter of the curved pipe, and R is the minimum bending radius of the curved pipe. Figure 4 The following is an indication: Before measurement, the inner diameter and bending condition of the curved pipe to be measured need to be evaluated, and then the inclinometer probe 2 of appropriate length should be selected. Usually, the length L0 of the inclinometer probe 2 in actual measurement should be 2 / 3 of the theoretical calculated length L, so To ensure that the inclinometer probe 2 can be smoothly inserted into the pipeline, in actual use, the longer the length of the inclinometer probe 2, the fewer the measurement segments, and the faster the test cycle; the shorter the length of the inclinometer, the denser the test segments, the greater the error of each segment, and the longer the test process; in addition, when the inner diameter d of the pipe wall is very large and the length of the inclinometer is very short, the test accuracy of each segment cannot be ensured, and only the overall inclination distribution of the pipeline can be observed.

[0062] In summary, the rotary-propelled inclinometer provided by the present invention can adapt to the inclination data measurement of curved pipes with different bending conditions and different inner diameters. The inclinometer probe can be smoothly inserted into the deepest part of the curved pipe to be measured through its own drive, and the inclination angle corresponding to each segment length is measured in turn according to the set segment length, and the inclination measurement of all curved pipes is finally completed. In addition, the structure of the present invention is relatively simple, the cost is low, and it has a high value of popularization and application.

[0063] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A rotary propulsion inclinometer for realizing angle monitoring of curved pipelines, characterized in that: The inclinometer includes: The probe part comprises a rotating propulsion head (1) arranged at one end of the spiral steel wire jacket (4) and an inclinometer probe (2) fixedly arranged in the spiral steel wire jacket (4); A control part: comprising a processing circuit board (11) with a controller, wherein the processing circuit board (11) is electrically connected to the inclinometer probe (2) via a signal cable (3); The driving part comprises a motor (14) electrically connected to the processing circuit board (11), a spiral steel wire storage box (7) which is transmission-connected to the motor (14) via a transmission member and is used to store the spiral steel wire jacket (4), and a transmission sleeve (10) which has a thread on its inner side that matches the spiral steel wire jacket (4) and is fixedly arranged.

2. A rotary propulsion inclinometer according to claim 1, characterized in that: The rotary propulsion head (1) is integrally formed at one end of the spiral steel wire jacket (4), or is installed at one end of the spiral steel wire jacket (4).

3. A rotary propulsion inclinometer according to claim 1, characterized in that: The overall shape of the rotary propulsion head (1) is shuttle-shaped, ellipsoidal, semi-ellipsoidal, truncated cone, cone or tubular, and the maximum diameter of the outer surface of the rotary propulsion head (1) is greater than the diameter of the spiral steel wire jacket (4) outside the inclinometer probe (2) and smaller than the minimum inner diameter of the pipe wall to be measured.

4. A rotary propulsion inclinometer according to claim 1, characterized in that: The other end of the spiral steel wire jacket (4) passes through the transmission sleeve (10), is wound and stored in the spiral steel wire storage box (7), and is fixed at the wire outlet at the bottom of the spiral steel wire storage box (7).

5. A rotary propulsion inclinometer according to claim 1, characterized in that: The inclinometer probe (2) comprises a hard pipe of a set length and an inclination sensor arranged in the hard pipe for measuring the inclination angle within the length of the inclinometer probe (2); one end of the signal cable (3) is connected to the inclination sensor, and the other end is connected to the processing circuit board (11) through a conductive slip ring (12) after passing through the other end of the spiral steel wire jacket (4).

6. A rotary propulsion inclinometer according to claim 1, characterized in that: The transmission member comprises a driving gear (8) connected to the transmission shaft of the motor (14) and a driven gear (9) meshing with the driving gear (8), the driven gear (9) being fixedly connected to the spiral wire storage box (7), and the driven gear (9) being connected to the transmission sleeve (10) via a bearing.

7. A rotary propulsion inclinometer according to claim 1, characterized in that: The inclinometer also includes a length measuring part, which includes a length measuring gear (5) and a rotary encoder (6) arranged on the rotating shaft of the length measuring gear (5), the length measuring gear (5) is in contact with the spiral steel wire jacket (4) and rotates with the expansion and contraction of the spiral steel wire jacket (4), and the rotary encoder (6) is connected to the processing circuit board (11).

8. A rotary propulsion inclinometer according to claim 7, characterized in that: The motor (14) is fixedly mounted in a movable bracket (15) with casters, and a dust removal brush (13) is provided on the outside of the spiral steel wire jacket (4).

9. A rotary propulsion inclinometer according to claim 7, characterized in that: The length of the inclinometer probe (2) during actual measurement is determined by the inner diameter and bending condition of the curved pipe to be measured, and thus: Wherein, L0 is the length of the inclinometer probe during actual measurement, d is the inner diameter of the curved pipe to be measured, and R is the minimum bending radius of the curved pipe to be measured.

10. A rotary propulsion inclinometer according to claim 9, characterized in that: The steps of measuring the inclination of the curved pipe to be measured by the inclinometer include: 1) Arrange the inclinometer at the curved pipe to be tested, and extend the inclinometer probe into the curved pipe to be tested; 2) The processing circuit board controls the motor to rotate forward, driving the spiral wire jacket to rotate forward so that the inclinometer probe is pushed to the deepest part of the curved pipe to be measured; 3) Temporarily turn off the motor to wait for the inclinometer probe to stabilize, and then the processing circuit board reads the inclination data α1 output by the inclination sensor at this time; 4) The processing circuit board controls the motor to rotate in the reverse direction, driving the spiral wire jacket to rotate in the reverse direction to make the inclinometer probe retreat to a set length, that is, the length of the inclinometer probe during actual measurement; 5) Temporarily turn off the motor to wait for the inclinometer probe to stabilize, and then the processing circuit board reads the inclination data α2 output by the inclination sensor at this time; 6) Repeat steps 4) and 5) to obtain the inclination data corresponding to each set length section in the pipeline to be tested in sections, and draw a data map of the entire curved pipeline to be tested based on all the section lengths and angle data.

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