Simple track mobile radar flow measuring device depending on cross-river structure

Abstract

This invention discloses a simple track-mounted mobile radar flow measurement device based on a cross-river structure, belonging to the field of hydrological flow velocity monitoring technology. It includes multiple detachable fixed mounting bases installed on existing cross-river structures, a track assembly resting on top of the bases and secured with U-bolts, a moving module that moves along the track, a radar speed measurement module mounted on the moving module, and a traction module controlled from the bank. The bases have built-in adjusting screws with spherical joints for independent leveling to compensate for installation errors; the track uses circular tube connections and forms an axially sliding connection with the base to release thermal stress; the moving module achieves bidirectional limiting and anti-tipping through upper moving wheels and side moving wheels with annular grooves. This invention has a simple structure and low cost, can be quickly constructed using existing bridges or dams, and allows operators to drive the radar from the bank to complete full-section high-precision mobile flow measurement, significantly improving the safety, economy, and data standardization of hydrological measurements.

Description

Technical Field

[0001] This invention belongs to the field of hydrological flow velocity monitoring technology, specifically relating to a mobile radar flow measurement device built on existing cross-river hydraulic structures such as bridges, cross-river dams, and aqueducts. Background Technology

[0002] Radar current velocity monitoring is currently the core technology for non-contact hydrological current velocity measurement. Existing radar current measurement equipment and deployment methods are mainly divided into three categories, but each has fundamental shortcomings in balancing safety, accuracy, and cost, and cannot meet the routine monitoring needs of grassroots hydrological stations.

[0003] Category 1: Handheld radar speed guns. This type of equipment relies entirely on manual on-site operation. Testers need to frequently move along bridges, riverbanks, and other high-risk water areas in adverse weather conditions such as wind, rain, and high temperatures to change test points at different starting distances. This method has the following inherent drawbacks: (1) Working at heights near water results in extremely high risks of falling or drowning; (2) Manually moving test points is time-consuming, and multi-point testing on a single cross-section usually takes more than 1 hour, resulting in low efficiency; (3) Positioning relies on visual inspection or simple ruler measurement, which has large errors and affects the accuracy of flow rate estimation.

[0004] The second type: Fixed radar velocity measuring instruments. These devices are fixed to the riverbank or bridge railing by supports, allowing only single-point fixed velocity measurements. The velocity at a single measuring point cannot represent the velocity distribution across the entire river cross-section, resulting in severely insufficient representativeness of the test data and failing to meet the requirements of the "River Flow Measurement Standard" for cross-sectional flow estimation and hydrological data compilation. Furthermore, once the equipment is fixed, it cannot be adjusted, and the measurement accuracy significantly decreases when water level or flow conditions change.

[0005] The third category: professional cross-river track-type / cableway mobile radar flow measurement device. This type of device uses a special customized track (steel wire rope track or aluminum alloy track) to cross the river and uses an electric trolley to carry the radar to achieve cross-section movement speed measurement. However, it has the following obstacles to its promotion and application: (1) The cost of the whole system is high, with a single set costing more than 100,000 yuan; (2) It is necessary to build cableway supports or measuring bridges on both sides of the river. The cross-river high-altitude construction is difficult and has a long cycle, requiring professional personnel for construction and debugging; (3) The track and walking mechanism are all customized precision components, and the later maintenance cost is high. It is only suitable for national key monitoring sections. In addition, when facing different cross-river building structures (guardrail shape, installation surface flatness), the existing professional devices often need to be redesigned and customized for installation, lacking a structural design that can actively adapt to building installation errors and track deformation.

[0006] In summary, current technologies cannot simultaneously achieve the goals of low-cost investment, safe remote operation, accurate velocity measurement across the entire cross-section, and simple construction and maintenance. Grassroots hydrological surveys urgently need a mobile flow measurement device that can utilize existing river-crossing structures, employ common building materials, possess adaptive adjustment capabilities, be disassembled and reused, and be inexpensive. Summary of the Invention

[0007] This invention provides a simple track-mounted mobile radar flow measurement device based on a cross-river structure. It includes multiple fixed mounting bases that can be detachably installed on existing cross-river structures, a track assembly placed on top of the bases and secured with U-bolts, a walking module that moves along the track, a radar speed measurement module installed on the walking module, and a traction module controlled from the bank. The device has a simple structure and low cost, and can be quickly set up using existing bridges or dams. Operators can drive the radar from the bank to complete full-section high-precision mobile flow measurement, thus solving the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A simple track-mounted mobile radar flow measurement device based on a structure spanning a river includes:

[0010] Multiple fixed mounting bases are installed at intervals and detachably on existing cross-river hydraulic structures in a direction perpendicular to the river channel cross-section;

[0011] The track assembly rests horizontally on top of all the fixed mounting bases and is tightly connected to each fixed mounting base by U-bolts; the tight connection provides a radial locking force, which allows the track assembly to slide axially relative to the fixed mounting base under thermal stress.

[0012] The mobile walking module includes a walking bracket, upper walking wheels mounted on both sides of the top of the walking bracket and pressed against the top surface of the track assembly, and side walking wheels mounted on both sides of the walking bracket and supporting the inner side of the track assembly; the working surface of the side walking wheels is provided with annular grooves adapted to the outer diameter of the track assembly, which are used to limit the lateral displacement and side tipping of the mobile walking module.

[0013] The radar speed measurement module is installed on top of the mobile walking module, with its probe pointing vertically towards the river surface.

[0014] The traction control module is connected to the mobile walking module, and its operating end or signal receiving end is located in the safe working area on the shore.

[0015] As a further option, the fixed mounting base includes a base plate, a left and right vertical plates fixed to the base plate, a top support plate fixed to the top of the left and right vertical plates, and an adjusting screw; the upper surface of the top support plate is provided with a contoured groove matching the shape of the track assembly, and the lower surface is provided with a hemispherical recess; a fixing nut is fixed on the base plate, and the adjusting screw passes through the fixing nut and has a spherical hinge end at its top end, which is inserted into the hemispherical recess to form a spherical pair fit, used to adjust the height and level of the top support plate; the adjusting screw is also provided with a locking nut, which presses the top support plate from above downwards.

[0016] As a further option, the track assembly consists of two parallel metal tubes with a fixed spacing; the contour groove is an arc-shaped concave surface with a radius of curvature slightly larger than the outer diameter of the metal tube, forming a slight interference fit to generate a pre-clamping force on the metal tube.

[0017] As a further option, the track assembly is formed by connecting multiple metal round tubes end to end through a threaded joint, which is an internally threaded pipe clamp used to connect the external threads at the ends of two adjacent metal round tubes.

[0018] As a further option, the metal tube is provided with a flat platform or shallow groove at the position where the U-bolt is clamped, so that the top of the U-bolt after it is tightened is not higher than the upper surface of the metal tube, so as to avoid interference with the upper traveling wheel.

[0019] As a further option, the mobile walking module also includes a multi-point locking mechanism, which includes a spring locking pin mounted on the walking bracket; the track assembly is provided with a plurality of tapered positioning holes spaced apart along the length direction; the tapered pin head of the spring locking pin is used to cooperate with the tapered positioning holes to achieve positioning.

[0020] As a further option, the traction control module is a manual traction module, including a traction rope, two fixed pulleys respectively installed at both ends of the track assembly, and clamping seats fixed to the front and rear ends of the mobile walking module; one end of the traction rope is fixed to the clamping seat at the front end, and the other end passes through the fixed pulley on the opposite bank side and the fixed pulley on the bank side in sequence before being fixed to the clamping seat at the rear end, forming a single-rope closed loop for bidirectional driving of the walking module.

[0021] As a further option, the traction control module is an electric remote control module, including a miniature geared motor, a winch mounted on the output shaft of the geared motor, a wire rope wound on the winch, a wireless remote control handle, and a hysteresis torque limiter installed between the output shaft of the geared motor and the winch; the two ends of the wire rope are respectively connected to the front and rear ends of the mobile walking module, and pass around the guide pulleys at both ends of the track assembly to form a closed loop; the hysteresis torque limiter is used to slip in case of overload to achieve overload protection.

[0022] As a further option, the radar speed measurement module is installed on the top of the mobile walking module via a quick-release clamp, and the radar speed measurement module is a non-contact radar flow meter with its own rechargeable battery and wireless data transmission function.

[0023] As a further option, the fixed mounting base is fixed to the cross-river hydraulic structure by any of the following methods: expansion bolts for concrete railings, stainless steel clamps for steel railings or steel trusses (with rubber pads between them and the railings), or counterweight bases for non-drillable structures.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. Operators can remotely control the mobile flow measurement device from the shore using a traction module, eliminating the safety risks of working near water or at height.

[0026] 2. The track is constructed using general-purpose round pipe building materials, which greatly reduces the cost. At the same time, it supports multi-point moving speed measurement across the entire cross section, solving the defect of poor representativeness of single-point flow measurement.

[0027] 3. The base has a built-in spherical adjusting screw, which can independently level and compensate for unevenness of the building; the track and the base are connected by "radial locking and axial sliding", which adaptively releases thermal stress and prevents the track from bending.

[0028] 4. All components are standard parts or simply machined parts, and are detachable and fixed in a way that allows for easy installation, disassembly, and relocation using ordinary tools.

[0029] 5. The vertical bearing wheel and the lateral limiting wheel with an annular groove form a two-way clamp to completely prevent tipping; combined with elastic positioning and locking, it ensures high repeatability of the distance between the measuring points. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0031] In the attached diagram:

[0032] Figure 1 This is a side view of the overall assembly structure of the present invention;

[0033] Figure 2 This is a top view of the overall structure of the present invention;

[0034] Figure 3 For the present invention Figure 1 Enlarged cross-sectional view of point A;

[0035] Figure 4 This is a detailed structural diagram of the fixed mounting base of the present invention;

[0036] Figure 5 This is a top view of the top support plate structure of the present invention;

[0037] Figure 6 This is a schematic diagram of the installation structure of the U-bolt and the track cross section of the present invention.

[0038] The corresponding component names are marked in the attached diagram:

[0039] 1. Existing cross-river hydraulic structures; 2. Fixed installation base; 3. Track assembly; 4. Moving and walking module; 5. Radar speed measurement module; 6. Traction control module; 9. Traction rope; 10. Clamping seat; 11. Fixed pulley; 21. Base plate; 22. Left upright plate; 23. Right upright plate; 24. Top support plate; 25. Adjusting screw; 26. Locking nut; 27. Fixing nut; 31. Threaded joint; 32. U-bolt; 41. Walking bracket; 42. Upper walking wheel; 42a. Lateral limit wheel; 43. Spring locking pin; 241. Contouring groove; 242. Hemispherical recess; 251. Small diameter end screw; 252. Spherical hinge end; 253. Metal retaining ring; 254. Adjusting groove. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1: As Figure 1 and Figure 2 As shown, this invention provides a simple track-mounted mobile radar flow measurement device based on a cross-river structure. The device is installed as a whole on an existing cross-river hydraulic structure 1, which can be a concrete or steel railing of a bridge, the top of a dam pier, the edge of an aqueduct, etc. The device consists of multiple fixed mounting bases 2 arranged at intervals perpendicular to the river cross-section. Each base is detachably fixed to the upper surface of the structure using clamps or expansion bolts. A track assembly 3 rests horizontally on the support surfaces on top of all the bases and is secured with U-bolts 32, allowing for slight axial sliding. A mobile walking module 4 is located between two parallel tracks, with its side wheels 42a resting against the inner sides of the two tracks and its upper wheels 42 pressing against the top of the two tracks. A radar speed measurement module 5 is vertically mounted on top of the walking module, with its probe facing downwards and forming a fixed angle with the river surface. A traction control module 6 has a traction rope or chain connected to the walking module, and its control end or remote control signal receiver is located in a safe working area on the bank.

[0042] Once the entire assembly is complete, operators can control the walking module to move along the track to any starting point without having to go onto the bridge or be near the water. The radar speed measurement module automatically collects the surface flow velocity and transmits it wirelessly to the handheld terminal, realizing full-section mobile flow measurement.

[0043] like Figure 3 and Figure 4 As shown, as a further embodiment, the detailed structure and assembly of the fixed mounting base 2 are illustrated.

[0044] The fixed installation base 2 is an integral welded assembly, consisting of a base plate 21, a left upright plate 22, a right upright plate 23, a top support plate 24, an adjusting screw 25, a locking nut 26, and a fixing nut 27. All steel is hot-dip galvanized for resistance to outdoor corrosion.

[0045] The base plate 21 is made of steel plate and is rectangular in shape. Each of the four corners of the base plate 21 has a through hole for mounting clamps or expansion bolts. The lower surface of the base plate 21 is machined with intersecting anti-slip grooves, which are groove-shaped. The function of these anti-slip grooves is to generate static friction resistance by embedding the grooves into the micro-unevenness of the building surface when the base is not fully tightened, preventing the base from sliding during installation; at the same time, even if the bolts loosen slightly during long-term use, the grooves still provide a certain degree of anti-slip capability, which is a passive safety design.

[0046] Both the left upright plate 22 and the right upright plate 23 are made of equilateral angle steel. The opening of the angle steel faces the outside of the base (i.e., the opening of the left upright plate faces left and the opening of the right upright plate faces right), and the back of the angle steel (the outside of the right angle) faces the center of the base. The upright plates are vertically welded to the upper surface of the base plate, and double-sided continuous fillet welds are made along the edges where the upright plates and the base plate intersect. After welding, spatter is removed and rust prevention treatment is applied.

[0047] like Figure 3 and Figure 5 As shown, the top support plate 24 is made of steel plate and welded to the upper surface of the left and right vertical plates. The upper surface of the support plate 24 (i.e., the surface supporting the rail) is machined with a rail profile groove 241. Since this embodiment uses parallel double circular tube rails, each base has two parallel grooves to support two circular tube rails respectively. The groove is an arc-shaped concave surface, the arc length of which covers about one-third of the circumference of the circular tube, and the radius of curvature is slightly larger than the outer diameter of the rail (forming a slight interference fit allowance). The function of this slight interference fit is that after the rail is placed in the groove, the two sides of the groove will produce slight elastic deformation, thereby generating a pre-clamping force on the rail and preventing the rail from rolling when the U-bolts are not installed.

[0048] A hemispherical recess 242 is machined at the center of the lower surface of the support plate 24, which is used to form a spherical-socket point contact fit with the top of the adjusting screw. The technical principle is detailed below.

[0049] Multiple fixing nuts 27 are welded at intervals along the track direction on the base plate 21 (between the left and right upright plates). A through hole is provided below the fixing nuts 27 for placing the adjusting screws 25. Each adjusting screw 25 is a stainless steel screw. The lower end of the screw passes through the fixing nut 27 on the base plate. The fixing nut 27 adopts a nylon insert type. After tightening, the nylon ring hugs the thread to prevent vibration from loosening.

[0050] The upper end of the adjusting screw 25 passes through the space between the left and right vertical plates and rests against the hemispherical recess 242 on the lower surface of the support plate 24. When the adjusting screw 25 is rotated, since the adjusting screw 25 and the fixing nut 27 on the lower surface of the base plate 21 form a threaded pair, the rotational movement of the adjusting screw 25 is converted into axial lifting and lowering of the screw relative to the base plate 21. The top of the adjusting screw 25 is also spherically hinged to a small-diameter end screw 251 (about half the diameter of the lower end). The lower end of the small-diameter end screw 251 is an integrally formed spherical hinge end 252. Correspondingly, the top of the adjusting screw 25 is provided with a spherical groove, and a metal retaining ring 253 is welded to the top of the spherical groove. The outer edge of the metal retaining ring is chamfered. The small-diameter end screw 251 can be multi-directionally adjusted relative to the adjusting screw 25 within a certain range through the spherical hinge end 252. At the same time, the top of the small-diameter end screw 251 is connected to the locking nut 242. 6. The support plate 24 is fitted with a corresponding adjusting groove 254 within the contour groove 241 to accommodate the upper end of the small-diameter screw 251 and the locking nut 26. During adjustment, the adjusting screw 25 is rotated with a wrench. After the adjusting screw 25 rises and falls, it presses against the hemispherical recess 242 to adjust the support plate 24 to the required height and level. Then, the locking nut 26 is tightened from top to bottom, so that the lower end face of the locking nut 26 presses tightly against the upper surface of the adjusting groove 254 of the support plate 24. In this way, the support plate 24 is clamped between the locking nut 26 and the screw head of the adjusting screw 25, achieving self-locking.

[0051] If the screw tip and the lower surface of the support plate are in planar contact, when the support plate tilts due to adjustment needs (e.g., to compensate for unevenness in a building), the screw tip will make line contact or even point contact with the support plate, which can easily lead to slippage. This application uses a hemispherical recess and the screw tip (machined into a hemispherical shape) to form a spherical pair, allowing the support plate to tilt at a certain angle relative to the screw. The contact stress is concentrated at the center of the recess, avoiding additional bending moment and preventing the screw from bending. At the same time, when the support plate tilts relative to the adjusting screw, the small-diameter end screw can still rotate relative to the adjusting screw to compensate for the tilt, which is conducive to a stable and tight fit between the locking nut and the support plate.

[0052] Different fasteners are selected according to the type of building: expansion bolts are used for concrete railings; stainless steel clamps are used for steel railings or steel trusses, with rubber pads between the clamps and the railings; and counterweight bases are used for ancient or dangerous bridges that cannot be drilled, i.e., counterweight boxes are added above the base plate and pressed down by their own weight.

[0053] A set of bases is installed at regular intervals along the track extension direction. When the track span is large, reinforced bases are added in the mid-span area, and the spacing is increased. This spacing is determined based on track strength and stiffness calculations to ensure that track deflection is within allowable limits when the traveling module passes through.

[0054] Assembly sequence:

[0055] First, mark the base position lines on the building; align the base plate with the marks, but do not tighten it yet; place the two parallel rails in the two contour grooves of the base respectively; use a level to measure the levelness and parallelism of the upper surfaces of the two rails, and adjust the height of each base by rotating the adjusting screw one by one until the overall levelness and parallelism of the rails meet the requirements; then tighten the locking nuts of the base and the building fasteners; finally, use U-bolts to secure each rail.

[0056] like Figure 1 and Figure 2 As shown, as a further embodiment, the detailed structure and assembly of the track assembly 3 are illustrated.

[0057] The track is made of metal round tubes, preferably hot-dip galvanized seamless steel pipes. In this embodiment, a double-track parallel layout is adopted, with the two tracks parallel and the spacing fixed (this spacing matches the width of the traveling support), and the spacing is maintained by a transverse connecting rod.

[0058] The length of a single steel pipe is determined based on the convenience of transportation and installation; when it exceeds this length, multiple sections are joined together. When the width of the river channel is greater than the length of a single track, multiple steel pipes need to be joined together. The joining process uses a simple and convenient threaded connector (31) connection method. Specifically, external threads are machined at both ends of each steel pipe to be connected, and a pipe clamp-type connector with internal threads is provided. During joining, first, one pipe clamp is fully screwed onto the end of one steel pipe, then the end of the other steel pipe is aligned and screwed into the other end of the pipe clamp until the end faces of the two steel pipes are tightly fitted inside the pipe clamp. To prevent the threaded connection from loosening during long-term vibration, thread-locking adhesive or Teflon tape can be applied to the threads. This threaded connector connection method is simple to operate, requiring only common tools such as pipe wrenches, without the need for special equipment. It also offers high connection strength, good coaxiality, and facilitates quick on-site installation and maintenance.

[0059] like Figure 1 and Figure 6 As shown, after the track is placed in the contour groove 241 of the base support plate, it is secured with U-bolts 32. A rubber gasket is placed between the arc-shaped bottom of the U-bolt and the track, and the support plate 24 has a hole for the lower end of the U-bolt 32 to pass through. When the nut at the lower end of the U-bolt is tightened, the rubber gasket is compressed, generating positive pressure, thereby generating sufficient static friction between the track and the support plate to prevent the track from sliding on its own during normal use. However, when temperature changes cause thermal expansion and contraction, this static friction is insufficient to prevent sliding, so the track will slowly slide axially to release thermal stress. This is a "radially locked, axially sliding semi-constrained connection".

[0060] To avoid interference between the U-bolt 32 and the upper traveling wheel 42, this embodiment employs the following design: a flat platform or shallow recess is pre-machined on the circular tube track at the position where the U-bolt 32 is tightened, so that the arc-shaped bottom of the U-bolt 32 is flush with (or slightly lower than) the upper surface of the track 3 after tightening. In this way, when the upper traveling wheel 42 rolls past the base position, the wheel surface remains in contact with the upper surface of the track, preventing it from crushing the U-bolt and thus avoiding impact and interference. Furthermore, because the rubber-coated wheel itself has a certain degree of elasticity, even with installation errors, the wheel can adapt automatically.

[0061] After installation, use a level to measure the horizontality of the upper surfaces of the two tracks, ensuring the error does not exceed the specified value; use a theodolite to measure the angle between the track axis and the perpendicular line of the river channel cross-section, ensuring the error is within the allowable range. If the error exceeds the limit, correct it by adjusting the base adjusting screw.

[0062] On the center line of the upper surface of each track, a blind hole is drilled at regular intervals (e.g., 500 mm) along the length direction using a drill jig. The hole depth is moderate (not penetrating the pipe wall). After drilling, the bottom of the hole is machined into a tapered shape using a tapered reamer. This blind hole serves as the positioning hole for the multi-point locking mechanism, and the preferred spacing of the positioning holes is designed according to the preset flow measurement points.

[0063] like Figure 1 and Figure 2 As shown, as a further embodiment, the detailed structure and assembly of the mobile walking module 4 are described.

[0064] The mobile walking module 4 is the core moving component of the entire device, undertaking three functions: carrying radar, moving along the track, and precise positioning. This embodiment adopts a layout with two parallel tracks and the walking support located between the two tracks. Its structure consists of a walking support, a walking wheel set, a multi-point locking mechanism, and a radar mounting base.

[0065] The traveling support 41 is a rectangular frame formed by welding square tubes. Its width is slightly smaller than the inner distance between the two parallel tracks, allowing the support to be positioned between the two tracks without interference. A horizontal platform is provided on the top of the support for mounting the radar; lugs are provided at the front and rear ends of the support for connecting the traction components; side traveling wheels are installed on the left and right sides of the support (corresponding to the inner sides of the tracks); and top traveling wheels are installed on the top two sides of the support (corresponding to the top of the tracks).

[0066] The traveling wheel assembly includes an upper traveling wheel 42 and a side traveling wheel 42a, which respectively undertake the functions of load bearing and guidance.

[0067] Upper traveling wheels 42: Installed on both sides of the top of the traveling bracket, one upper traveling wheel corresponds directly above each track. The wheel surface of the upper traveling wheel is flat or slightly curved, pressing directly onto the top of the circular tube track. The upper traveling wheels are rubber-coated wheels (metal core, polyurethane or rubber outer layer) to increase friction and reduce traveling noise.

[0068] Side travel wheels 42a: Installed on both sides of the travel bracket, with two side travel wheels 42a corresponding to the inner side of each track. The wheel surface of each travel wheel has an annular groove machined on it. The cross-sectional shape of the annular groove is arc-shaped, and its radius of curvature is adapted to the outer diameter of the circular tube track. After assembly, the side travel wheels support the circular tube track from the side, and the annular groove and the circular tube form a concave-convex fit, thereby restricting the lateral movement of the travel module relative to the track and its rotation around the track axis.

[0069] The upper traveling wheel 42 and the side traveling wheel 42a together form "two-way limiting" for the circular tube track. The upper traveling wheel provides downward pressure, and the side traveling wheel provides lateral limiting. The combined force of the two clamps the traveling module stably on the track, while the geometric constraint of the annular groove completely eliminates the rotational degree of freedom of the traveling module relative to the track axis (i.e., prevents tipping).

[0070] Multi-point locking mechanism: Includes spring locking pin 43, which is installed on the side of the traveling bracket 41. It includes a tube and a spring and locking pin inside the tube. The elastic compressive force from the spring to the locking pin is used to press it onto the track 3 to achieve the positioning of the trolley. Preferably, the pin head is tapered, cooperating with a pre-made tapered positioning hole on the track 3. The tapered positioning hole can serve as a preset flow measurement point, achieving stable positioning at that preset flow measurement point. During travel, the locking pin is compressed back under external tension. Since the two tracks run parallel, each track has a corresponding positioning hole. Two spring locking pins are simultaneously inserted into the positioning holes of the two tracks, achieving higher positioning repeatability.

[0071] like Figure 1 and Figure 2 As shown, in a further embodiment, the installation, power supply, and communication of the radar speed measurement module 5 are described.

[0072] This device is not limited to a specific radar model; any commercially available radar speedometer that meets the requirements for non-contact water surface velocity measurement can be used, with models that have built-in rechargeable batteries and wireless data transmission capabilities being preferred.

[0073] Insert the body of the radar speed measurement module 5 into the ring of the quick-release clamp, adjust the probe direction so that it is vertically downward (the built-in inclinometer or external level can be used), and then press down the locking handle to fix it.

[0074] Wireless solution: The radar is powered by an internal battery, and flow rate data is transmitted wirelessly (such as Bluetooth, WiFi, or 4G / 5G) to a handheld terminal (mobile phone, tablet) or computer on the shore. Staff can receive and record the data from a safe area.

[0075] Wired Alternative: If the radar does not support wireless, a flexible drag chain cable will be used. The cable is a multi-core shielded cable containing power and signal wires. The cable runs along the track, suspended below the traveling module, and is attached at regular intervals to pre-set wire guides on the side of the track using sliding rings. One end of the cable connects to the radar, and the other end extends along the track to the shore to connect to the controller (which includes a built-in battery and signal converter). As the traveling module moves, the cable slides along the rings, preventing tangling.

[0076] The operator opens the accompanying software on the handheld terminal, sets the measurement point locations (corresponding to the positioning hole numbers on the track), then controls the walking module to move to each measurement point, locks the position, and clicks the data acquisition button. The radar automatically measures the surface flow velocity, and the software simultaneously records the starting distance and flow velocity value at that point. After all points are measured, the software calculates the flow rate based on the cross-sectional shape and generates a report.

[0077] like Figure 2 As shown, two implementation schemes of the traction control module 6 are presented as further embodiments.

[0078] Manual traction solution (low cost, no power supply scenario)

[0079] composition:

[0080] Flexible traction rope: A wear-resistant nylon rope or thin steel wire rope with sufficient breaking strength.

[0081] Fixed pulleys: Two stainless steel fixed pulleys (with rolling bearings) are installed at both ends of the track assembly (near shore end and opposite shore end).

[0082] Traction rope clamps: Two, fixed to the front and rear ends of the mobile walking module respectively, are used to reliably fix the two ends of the traction rope.

[0083] Handle (optional): Installed on the rope of the operating section on the shore for easy gripping.

[0084] Rope winding and fixing method (single rope closed loop):

[0085] A single traction rope (9) is used to achieve bidirectional drive. The specific winding and fixing steps are as follows:

[0086] ① Fix one end of the traction rope 9 to the clamping seat 10 at the front end of the walking module;

[0087] ② Fix the other end of the traction rope 9 to the clamping seat 10 at the rear end of the walking module;

[0088] ③ Rope path: The rope segment starting from the front end of the walking module extends forward (towards the opposite bank), passes around the fixed pulley 11 installed at the far end of the track (on the opposite bank side), then turns back and returns to the bank along the other side of the track (or the same side but at a different height), passes around the fixed pulley 11 installed at the near end of the track (on the bank side), and finally connects to the clamping seat 10 at the rear end of the walking module.

[0089] At this point, the entire traction rope 9 forms a closed loop, the walking module is connected in series on a section of the closed loop, and the two fixed pulleys 11 are located at both ends of the track and change the direction of the rope.

[0090] Operation method:

[0091] The operator stands in a safe area on the shore and pulls the rope segment located between the near and far fixed pulleys 11 (i.e., the rope segment moving from the shore pulley to the opposite pulley). When this rope segment is pulled, the tension is transmitted through the far fixed pulley 11 to the front of the walking module, driving the walking module towards the opposite shore. Conversely, pulling the other rope segment (i.e., the rope segment returning from the shore pulley to the operating area on the shore) directly applies tension to the rear of the walking module, driving it back towards the shore. After releasing the rope, the walking module stops naturally due to the static friction between the wheels and the track. Upon reaching the predetermined measuring point, the multi-point locking mechanism is operated to achieve precise positioning. The moving speed is controlled by the rope pulling speed.

[0092] This solution requires only one traction rope 9 and two fixed pulleys 11. It has a simple structure, is not easy to get tangled, and the front and rear ends of the walking module are directly stressed, with a clear direction of movement. There is no need to replace or rearrange multiple ropes.

[0093] Electric remote control solutions (automated, long-distance) are a common alternative to manual solutions, and their basic principles are similar, so no further detailed explanation with diagrams is required.

[0094] composition:

[0095] Miniature geared motor: DC motor with adjustable output speed and sufficient output torque to drive the walking module. Transmission components: High-strength flexible steel wire rope (2-3mm in diameter) is used instead of chains or belts to reduce noise and simplify tensioning.

[0096] Winch: Installed on the output shaft of the geared motor, used to wind up and unwind wire rope.

[0097] Guide pulley: Installed at the other end of the track, used to change the direction of the wire rope.

[0098] Hysteresis torque limiter: installed between the output shaft of the geared motor and the winch drum for overload protection.

[0099] Wireless remote control handle: Industrial-grade remote control with forward, backward, stop, and speed adjustment functions; the remote control distance meets on-site requirements.

[0100] Storage batteries: placed in a waterproof tank on the shore.

[0101] Installation and transmission methods:

[0102] One end of the wire rope is secured to the front connecting ear of the traveling module via a shackle or rope clamp, and the other end is secured to the rear connecting ear of the traveling module. The wire rope is arranged as follows: starting from the rear connecting ear, it passes sequentially through the far-end guide pulley, the winch drum, and the near-end guide pulley, finally securing to the front connecting ear, forming a closed loop. When the winch drum rotates clockwise, it winds up the wire rope closest to the motor while simultaneously releasing the other side, thus driving the traveling module to move in one direction; when rotating counterclockwise, it moves in the opposite direction. A tensioning pulley (or spring tensioner) is installed at an appropriate position on the wire rope to maintain it at a suitable tension, preventing slippage or derailment.

[0103] The function of a torque limiter:

[0104] When the traveling module reaches the endpoint and impacts the mechanical limit stop, or encounters a foreign object causing obstruction, the resistance of the transmission system increases sharply. In this situation, the hysteresis torque limiter will slip: when the load torque exceeds the set value, relative sliding occurs between the hysteresis disk and the drive disk inside the limiter. The motor can still idle, but power is no longer transmitted to the winch drum. This achieves overload protection, and no manual reset is required after slippage; transmission automatically resumes when the resistance decreases.

[0105] operate:

[0106] The operator holds the remote control handle and presses the forward button; the walking module moves towards the opposite bank at a set speed. Releasing the button stops the movement. The remote control handle has an adjustable speed to accommodate different measurement point distances.

[0107] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A simple track-mounted mobile radar flow measurement device relying on a structure spanning a river, characterized in that, include: Multiple fixed mounting bases (2) are installed at intervals and detachably on existing cross-river hydraulic structures (1) in a direction perpendicular to the river channel cross section; The track assembly (3) rests horizontally on top of all the fixed mounting bases (2) and is tightly connected to each fixed mounting base (2) by U-bolts (32); the tight connection provides a radial locking force, and the locking force allows the track assembly (3) to slide along its axial direction relative to the fixed mounting base (2) under thermal stress; The mobile walking module (4) includes a walking bracket (41), upper walking wheels (42) installed on both sides of the top of the walking bracket (41) and pressed against the top surface of the track assembly (3), and side walking wheels (42a) installed on both sides of the walking bracket (41) and supporting the inner side of the track assembly (3); the working surface of the side walking wheel (42a) is provided with an annular groove adapted to the outer diameter of the track assembly (3) to limit the lateral displacement and side roll of the mobile walking module (4); The radar speed measurement module (5) is installed on the top of the mobile walking module (4), with its probe facing vertically toward the river surface; The traction control module (6) is connected to the mobile walking module (4), and its operating end or signal receiving end is located in the safe working area on the shore.

2. The apparatus according to claim 1, characterized in that, The fixed mounting base (2) includes a base plate (21), a left upright plate (22) and a right upright plate (23) vertically fixed to the base plate (21), a top support plate (24) fixed to the top of the left upright plate (22) and the right upright plate (23), and an adjusting screw (25); the upper surface of the top support plate (24) is provided with a contour groove (241) matching the shape of the track assembly (3), and the lower surface is provided with a hemispherical recess (242); the base plate (21) A fixing nut (27) is fixed on the top, and the adjusting screw (25) passes through the fixing nut (27) and has a spherical hinge end (252) at its top. The spherical hinge end (252) is inserted into the hemispherical recess (242) to form a spherical pair fit, which is used to adjust the height and level of the top support plate (24). The adjusting screw (25) is also provided with a locking nut (26), which presses the top support plate (24) from above and below.

3. The apparatus according to claim 2, characterized in that, The track assembly (3) consists of two parallel metal tubes with a fixed spacing; the contour groove (241) is an arc-shaped concave surface with a radius of curvature slightly larger than the outer diameter of the metal tube, forming a slight interference fit to generate a pre-clamping force on the metal tube.

4. The apparatus according to claim 3, characterized in that, The track assembly (3) is formed by connecting multiple metal round tubes end to end through a threaded joint (31). The threaded joint (31) is an internal threaded pipe clamp used to connect the external threads at the ends of two adjacent metal round tubes.

5. The apparatus according to claim 3, characterized in that, The metal tube is provided with a flat platform or shallow groove at the position where the U-bolt (32) is clamped, so that the top of the U-bolt (32) after it is tightened is not higher than the upper surface of the metal tube, so as to avoid interference with the upper traveling wheel (42).

6. The apparatus according to claim 1, characterized in that, The mobile walking module (4) also includes a multi-point locking mechanism, which includes a spring locking pin (43) installed on the walking bracket (41); the track assembly (3) is provided with a plurality of tapered positioning holes spaced apart along the length direction; the tapered pin head of the spring locking pin (43) is used to cooperate with the tapered positioning hole to achieve positioning.

7. The apparatus according to claim 1, characterized in that, The traction control module (6) is a manual traction module, including a traction rope (9), two fixed pulleys (11) installed at both ends of the track assembly (3), and clamping seats (10) fixed at the front and rear ends of the mobile walking module (4); one end of the traction rope (9) is fixed to the clamping seat (10) at the front end, and the other end passes through the fixed pulley (11) on the opposite bank side and the fixed pulley (11) on the bank side in sequence before being fixed to the clamping seat (10) at the rear end, forming a single rope closed loop for bidirectional driving of the walking module.

8. The apparatus according to claim 1, characterized in that, The traction control module (6) is an electric remote control module, including a micro geared motor, a winch installed on the output shaft of the geared motor, a wire rope wound on the winch, a wireless remote control handle, and a hysteresis torque limiter installed between the output shaft of the geared motor and the winch; the two ends of the wire rope are respectively connected to the front end and the rear end of the mobile walking module (4), and pass around the guide pulleys at both ends of the track assembly (3) to form a closed loop; the hysteresis torque limiter is used to slip in case of overload to achieve overload protection.

9. The apparatus according to claim 1, characterized in that, The radar speed measurement module (5) is installed on the top of the mobile walking module (4) by a quick-release clamp, and the radar speed measurement module (5) is a non-contact radar flow meter with its own rechargeable battery and wireless data transmission function.

10. The apparatus according to claim 2, characterized in that, The fixed mounting base (2) is fixed to the cross-river hydraulic structure (1) by any of the following methods: expansion bolts for concrete guardrails, stainless steel clamps for steel guardrails or steel trusses (with rubber pads between them and the guardrails), or counterweight bases for non-drillable structures.

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