A template position checking and auxiliary diameter adjusting device for cooling tower cylinder wall construction

Abstract

The application discloses a template position checking and auxiliary diameter adjusting device and method for cooling tower cylinder wall construction. The device comprises a shell, a base, an elevation input module, a storage unit, a radius measurement module, a control unit, a display and prompt unit and a power supply. The storage unit pre-stores the design radius and design wall thickness corresponding to each elevation provided by a design unit and the cooling tower center coordinates. The radius measurement module is an RTK positioning module, which calculates the inner template upper opening radius in the radius mode and the inner and outer template spacing in the wall thickness mode through a coordinate conversion formula. The two modes can be switched at any time, and are flexible and adaptive to different scenes. In the construction stage, the radius mode is used to solve the line-of-sight obstruction problem, and the outer template is positioned by using a steel tape. In the completion and acceptance stage, the wall thickness mode can be used for digital wall thickness re-measurement and automatic data storage. The application realizes "one machine with multiple uses and flexible adaptation", is intuitive in operation, data is traceable, and can be connected to a BIM system.

Description

Technical Field

[0001] This invention belongs to the field of cooling tower construction technology, specifically relating to a template position verification and auxiliary diameter adjustment device and method for cooling tower cylinder wall construction. It is particularly suitable for rapid measurement, deviation verification and adjustment guidance of template radius in electric climbing formwork or flip formwork construction. It can also be used in wall thickness measurement scenarios where data retention is required, and can be flexibly applied throughout the entire process of construction and installation and final acceptance. Background Technology

[0002] In the construction of cooling tower walls, electric climbing formwork or flip-formwork processes are commonly used. Formwork installation has unique process requirements: the lower edge of the inner formwork for the layer to be poured is placed on the upper edge of the already poured inner formwork of the lower layer. Therefore, the vertical position of the inner formwork is determined by the elevation of the lower layer. Construction personnel need to focus on measuring and adjusting the radius of the upper edge of the inner formwork to ensure it conforms to the design radius at that elevation. After the inner formwork is fixed, the outer formwork is installed, and its position is determined by measuring whether the distance between the upper edges of the inner and outer formwork is equal to the design wall thickness at that elevation. In existing cooling tower wall construction, the verification of the formwork radius position typically uses the "center target method": a laser plumb line or suspended platform is set at the center of the tower as a reference point. Construction personnel use a steel tape measure or a handheld laser rangefinder to measure the distance radially from the top of the formwork to the center reference point, compare it with the design radius, calculate the deviation, and then adjust the connecting screws or other radial adjustment mechanisms based on experience. This method has the following prominent problems: Obstruction of the central reference line: As the construction height increases, the dense arrangement of operating platforms, steel mesh, formwork systems, and internal scaffolding frequently obstructs the line of sight from the top of the formwork to the center of the tower, making measurement impossible, especially in the section above the cooling tower throat where visibility is virtually nonexistent. Difficulty in setting or maintaining a stable central reference line: The tower's central reference line needs to be continuously extended upwards with the construction height, introducing errors with each measurement; high-altitude wind loads and temperature changes easily cause the reference point to sway. Lack of intuitive operation: The measured radius is the actual radius; construction personnel need to consult drawings to obtain the design radius and then manually calculate the deviation, a cumbersome and error-prone process. Inability to directly measure wall thickness: Traditional methods can only measure the radius; the positioning of the outer formwork relies on measuring the distance between the inner and outer formwork with a tape measure, resulting in low accuracy, errors, and the inability to record data digitally. Furthermore, during the final acceptance phase, a comprehensive review of the entire tower's radius and wall thickness is required. Traditional methods rely on manual measurement with a tape measure and manual recording, which is inefficient, error-prone, and difficult to create digital acceptance archives, failing to meet the modern engineering requirements for quality traceability. Therefore, there is a need for a rapid verification device that does not rely on the central line of sight, does not require the setting of a central target, and can be used simultaneously for radius measurement during the construction phase and wall thickness measurement during the acceptance phase, so as to achieve "one machine for multiple uses and flexible adaptation", which respects the on-site operating habits (steel tape measure for the outer formwork) and provides digital means to meet the acceptance requirements. Summary of the Invention

[0003] Purpose of the invention This invention aims to provide a device and method for template position verification and auxiliary diameter adjustment during cooling tower wall construction. Utilizing the geometric characteristic of cooling towers that "all template top radii are equal in the circumferential direction at the same elevation," the device automatically obtains the design radius and design wall thickness provided by the design unit at the current construction elevation. It measures the actual radius of the template top or the distance between the inner and outer templates, compares and displays the deviation in real time, and guides construction personnel to adjust the template position inwards or outwards. Data can also be recorded as needed. Two working modes can be switched at any time to flexibly adapt to different scenarios and user habits. Technical solution

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A template position verification and auxiliary diameter adjustment device for cooling tower wall construction, comprising: The housing (10) has a base (20) at the bottom that matches the top profile of the template, which is used to place the device directly on the top of the template and maintain stability by gravity.

[0005] The elevation input module is used to input the current construction elevation. The elevation can be manually entered via the numeric keypad of the LCD touch screen (50), or quickly selected via the elevation switching wheel (43), or received wirelessly from the construction management platform.

[0006] The storage unit (31) is pre-stored with the design radius and design wall thickness values ​​corresponding to each construction elevation provided by the design unit, as well as the plane coordinates (X0, Y0) of the central axis of the cooling tower.

[0007] The radius measurement module, integrated within the housing, is used to measure the actual radius of the device placement point. Preferably, the radius measurement module is an RTK positioning module, which receives satellite positioning differential signals via an RTK antenna (70) to obtain three-dimensional coordinates, calculates the horizontal distance to the central axis of the cooling tower as the measured radius, or calculates the measured wall thickness by measuring the coordinates of two points on the upper opening of the inner and outer templates. In localized areas where satellite signals are blocked, a laser ranging + tilt sensor combination can be used as a backup.

[0008] The control unit (30) is connected to the elevation input module, the storage unit (31) and the radius measurement module respectively. It is used to retrieve the design radius or design wall thickness according to the input elevation, compare the measured value with the design value, calculate the deviation, and generate the adjustment direction according to the positive or negative deviation.

[0009] The display and prompt unit, connected to the control unit (30), includes an LCD touch screen (50) and a two-color LED indicator (60) for displaying the current elevation, design value, measured value, deviation value, and adjustment direction. The two-color LED indicator (60) displays green when the deviation is within a preset allowable range and red when it exceeds the allowable range. The adjustment direction includes "inward adjustment" (the deviation is positive, the radius / wall thickness is too large, and the template needs to be moved towards the center of the tower) and "outward adjustment" (the deviation is negative, the radius / wall thickness is too small, and the template needs to be moved away from the center).

[0010] The data recording module automatically stores the elevation, measured value, design value, deviation, and timestamp for each measurement. This data recording module supports integration with Building Information Modeling (BIM) systems.

[0011] The wireless communication module (44) is used to upload real-time measurement data to the construction management platform or cloud to achieve remote monitoring and data backup.

[0012] The power supply (40) supplies power to the above modules. The power supply (40) is a rechargeable lithium battery, which is charged and transmits data through the data synchronization interface (42).

[0013] The control unit (30) is also equipped with an inclination sensor to correct for radius measurement errors caused by device tilt. The control unit (30) is also configured to: calculate the difference between the actual elevation and the input elevation, and simultaneously display the actual elevation value and the difference on the display unit; and automatically switch to the standby distance measurement mode and provide a prompt when the RTK signal is lost for more than a set time.

[0014] The present invention also provides a method for verifying the position and assisting in diameter adjustment of cooling tower templates using the above-mentioned device, comprising the following steps: Step A: Select either radius measurement mode or wall thickness measurement mode according to actual needs, and input the current construction elevation and allowable deviation; Step B: When it is necessary to measure the radius of the inner template, select the radius measurement mode, place the device on the upper opening of the inner template, obtain the coordinates of a single point through RTK, calculate the measured radius using the formula R_act = √[(X-X0)²+(Y-Y0)²], retrieve the design radius of the elevation provided by the design unit from the storage unit (31) for comparison, adjust the position of the upper opening of the inner template according to the deviation prompt "adjust inward" or "adjust outward", and store the data as needed; Step C: When it is necessary to measure the wall thickness and retain the data, select the wall thickness measurement mode, place the device on the upper opening of the inner template and the upper opening of the outer template respectively, obtain the coordinates of the two points, use the spatial distance formula T_act = √[(X1-X2)²+(Y1-Y2)²+(Z1-Z2)²] to calculate the actual wall thickness, retrieve the design wall thickness of the elevation provided by the design unit from the storage unit (31) for comparison, and adjust inward or outward according to the deviation prompt, and automatically store the measurement data as needed; Step D: The two modes can be switched at any time as needed without interfering with each other; during the construction phase, the positioning of the outer formwork is usually measured with a steel tape measure, so there is no need to use the wall thickness mode; during the completion and acceptance phase, the wall thickness mode can be used for comprehensive re-measurement and to form a digital acceptance record. Beneficial effects

[0015] Compared with the prior art, the present invention has the following beneficial effects: Completely solves the problem of obstructed view: Utilizing RTK positioning technology, there is no need to set any marker points at the center of the tower, and it is not affected by obstructions from the operating platform, steel mesh, formwork, or internal structure.

[0016] During the construction phase, we focus on the core pain points: Measuring the radius of the inner formwork is a difficult point in cooling tower construction, and this device accurately solves this problem; the outer formwork is measured with a steel tape measure, which is simple, intuitive, and in line with on-site habits, without increasing the burden on operators.

[0017] Digital re-measurement is achieved during the final acceptance phase: the high-precision coordinate measurement function of this device is used to comprehensively re-measure the wall thickness of the entire tower, automatically generate digital acceptance records, avoid errors in manual recording, and meet the requirements for quality traceability.

[0018] Dual-purpose and flexible: It can switch between two modes at any time. During the construction phase, the wall thickness mode can be used as needed (such as for spot checks), and during the final acceptance phase, the radius mode can be used to form a complete record. The same set of equipment covers the entire process, reducing equipment investment.

[0019] Intuitive operation: Directly displays elevation, design value, measured value and deviation, and clearly indicates the adjustment direction as "inward" or "outward".

[0020] No need to identify template number: Utilizing the characteristic that the radius is equal at the same elevation, the device can be placed on top of any template for measurement.

[0021] Real-time guidance, one-step solution: During the adjustment process, retesting can be performed at any time, and deviation changes can be displayed in real time, reducing repeated trial adjustments.

[0022] Automatic data recording and traceability: Measurement results are automatically stored and can be integrated with BIM systems to generate acceptance reports.

[0023] Remote monitoring: Data is uploaded in real time via a wireless communication module, allowing managers to remotely monitor construction quality. Attached Figure Description

[0024] Figure 1 a is a schematic diagram of the device of the present invention in radius mode.

[0025] Figure 1 b is a schematic diagram of the structure of the device of the present invention in the wall thickness mode.

[0026] Figure 2 This is a system block diagram of the device of the present invention.

[0027] Figure 3 This is a flowchart illustrating the operation of the device of the present invention.

[0028] Figure 1 a and Figure 1 In b, the meanings of each marker are as follows: 10-House; 20-Base; 30-Control unit; 31-Storage unit; 40-Power supply; 41-Power switch; 42-Data synchronization interface; 43-Elevation switching wheel; 44-Wireless communication module; 50-LCD touch screen; 60-Dual-color LED indicator; 70-RTK positioning module antenna. Detailed Implementation

[0029] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. This embodiment takes the construction of the wall of a large hyperbolic cooling tower as an example. The cooling tower has a water spray area of ​​9000 m², a tower height of 200 m, a throat radius of 36.5 m (elevation 120 m), a lower ring beam radius of 60.0 m (elevation 0 m), and a tower top radius of 48.0 m (elevation 200 m). The wall construction adopts an electric climbing formwork system, with the formwork evenly arranged along the circumference of the wall.

[0030] Example 1: Device Structure like Figure 1 a (radius mode) and Figure 1As shown in b (wall thickness mode), the device includes a housing (10) with a base (20) at its bottom that matches the contour of the top of the template. The shape of the base (20) is roughly adapted to the protrusion or groove at the top of the template, and the device can be placed directly on the top of the template and remain stable by gravity without the need for additional clamping or locking mechanisms. The top of the housing (10) integrates a high-precision RTK positioning module antenna (70) for receiving Beidou / GPS satellite signals and ground differential base station signals. The front of the housing (10) is equipped with an LCD touch screen (50) that can display the current elevation, design value, measured value, deviation value and adjustment direction in real time. The upper right of the display screen (50) is equipped with a two-color LED indicator (60) to indicate whether the deviation is within the allowable range. Below the display screen housing (50) are a power switch (41), a data synchronization interface (42) (USB-C interface) and a "elevation switching" quick scroll wheel or button (43). The housing (10) integrates a control unit (30), a storage unit (31), a lithium battery (40) and a wireless communication module (44). The storage unit (31) contains a table of design radius and design wall thickness values ​​corresponding to each construction elevation of the cooling tower provided by the design unit (listed from the lower ring beam to the top of the tower according to the construction section height), as well as the coordinates of the central axis of the cooling tower (X0, Y0).

[0031] The difference between radius mode and wall thickness mode in display: like Figure 1 As shown in Figure a, in radius mode, the display screen (50) displays: the current mode name "Radius Mode", the current elevation, the design radius R_des, the measured radius R_act, the radius deviation ΔR, and the adjustment direction prompt. Figure 1 As shown in b, in wall thickness mode, the display screen (50) displays: the current mode name "Wall Thickness Mode", the designed wall thickness T_des, the measured wall thickness T_act, the wall thickness deviation ΔT, the coordinates of the upper opening of the inner template and the upper opening of the outer template, and the adjustment direction prompt. The two modes can be switched with one click using the "Mode" button on the touch screen (50).

[0032] Example 2: System Composition like Figure 2As shown, the system includes: an elevation input module (touchscreen / scroll wheel (43)), a storage unit (31) (elevation-radius-wall thickness database), a radius measurement module (RTK positioning module (70)), a control unit (30) (microprocessor), a display and prompting unit (LCD screen (50) + two-color LED (60)), a data recording module (internal Flash storage), a wireless communication module (44) (Wi-Fi / 4G), and a power supply (40) (lithium battery, charged via USB interface (42)). The signal connection relationship between the modules is shown in the figure: the elevation input module, storage unit (31), and radius measurement module are respectively connected to the control unit (30), the control unit (30) is connected to the display and prompting unit, the data recording module, and the wireless communication module (44), and the power supply (40) supplies power to each module. The output of the tilt sensor is also connected to the control unit (30) to correct the radius measurement value.

[0033] Example 3: Data Pre-storage and Coordinate Conversion Algorithm During the construction preparation phase, the operators input the design coordinates (X0, Y0) of the cooling tower's central axis into the device's storage unit (31) via a USB data synchronization interface (42) or a wireless communication module (44). At the same time, the design radius R_des and design wall thickness T_des (usually provided in tabular form, for example, one elevation every 1.5m) corresponding to each construction elevation provided by the design unit are imported into the storage unit (31).

[0034] When the user inputs the current construction elevation H_input through the elevation input module (touchscreen keyboard or scroll wheel (43)), the control unit (30) retrieves the entry in the data table that is closest to the elevation. If H_input is completely consistent with the pre-stored elevation, it is retrieved directly; if they are inconsistent (such as due to design changes or special sections), the user can manually input the design radius and design wall thickness of the current elevation through the touchscreen (50).

[0035] Coordinate conversion algorithm for radius measurement mode: In radius measurement mode, the RTK positioning module outputs the three-dimensional coordinates (X,Y,Z) of the device location via the antenna (70). The control unit (30) first calculates the measured radius based on the pre-stored coordinates (X0, Y0) of the cooling tower's central axis. R_act = √[(X - X0)² + (Y - Y0)²] Then, retrieve the design radius R_des of the elevation from the storage unit (31) and calculate the radius deviation: ΔR = R_act - R_des Meanwhile, the control unit (30) calculates the elevation deviation ΔH = Z - H_input and displays it on the display screen (50). According to the sign and magnitude of ΔR, the control unit (30) drives the LED indicator (60): if |ΔR| ≤ the allowable deviation, the LED is green; otherwise, the LED is red, and if ΔR > 0, it prompts "adjust inward", and if ΔR < 0, it prompts "adjust outward".

[0036] Coordinate conversion algorithm for wall thickness measurement mode: In the wall thickness measurement mode, the control unit (30) sequentially acquires the coordinates P1(X1, Y1, Z1) of the upper opening of the inner template and the coordinates P2(X2, Y2, Z2) of the corresponding point on the upper opening of the outer template, and calculates the measured wall thickness according to the distance formula between two points in space: T_act = √[(X1 - X2)² + (Y1 - Y2)² + (Z1 - Z2)²] Retrieve the design wall thickness T_des corresponding to this elevation from storage unit (31) and calculate the wall thickness deviation: ΔT = T_act - T_des Based on the sign and magnitude of ΔT, the control unit (30) drives the LED indicator (60) and generates adjustment direction prompts: ΔT > 0 prompts "adjust inward" (the outer template is too far out and needs to be moved inward), ΔT < 0 prompts "adjust outward" (the outer template is too far in and needs to be moved outward).

[0037] All deviation calculation results and original coordinates can be optionally stored in the data recording module, with timestamps and operator identification added.

[0038] Example 4: Workflow like Figure 3 As shown, the device's workflow is as follows: Start → The user turns on the device via the power switch (41), inputs the current elevation and presets the allowable deviation via the touch screen (50), and selects the radius mode or wall thickness mode via the "mode" key → The control unit (30) retrieves the design value (radius or wall thickness) corresponding to the elevation from the storage unit (31) → The radius measurement module performs RTK measurement (radius mode is single-point coordinates, wall thickness mode is two-point coordinates) → The control unit (30) calculates the measured value according to the corresponding formula → Calculate the deviation → The actual elevation, elevation deviation, design value, measured value, and deviation are displayed simultaneously on the display screen (50) → The LED indicator (60) determines whether the deviation is within the allowable range? If yes, the LED light is green, indicating "qualified"; otherwise, the LED light is red, and the deviation is judged as positive or negative. Positive deviation prompts "adjust inward", negative deviation prompts "adjust outward". Construction personnel adjust the position of the template by operating the connecting screw according to the prompt, and can reposition the device at any time for retesting. After confirming that it is qualified, if data needs to be retained, press the "confirm" button, and the data will be automatically stored in the recording module. It can also be uploaded to the cloud via the wireless communication module (44). End.

[0039] Example 5: Typical Operations During Construction and Installation – Radius Measurement Mode (Core Application) After the construction workers arrive at the current construction floor, they place the bottom edge of the inner formwork of the layer to be poured onto the top edge of the inner formwork of the lower layer that has already been poured. The current construction elevation (e.g., 120.0m) and allowable radius deviation (e.g., ±10mm) are entered via the touchscreen (50). The device is placed directly on the top edge of the inner formwork via the base (20), without aiming at any center reference point. The "Radius Mode" is selected via the "Mode" key (see...). Figure 1 a) Press the measurement button, and the device automatically acquires the three-dimensional coordinates of a single point through the RTK antenna (70). The control unit (30) calculates the measured radius according to the formula R_act = √[(X - X0)² + (Y - Y0)²]. The display screen (50) shows: input elevation 120.0m, actual elevation 120.3m, elevation deviation +0.3m; design radius 36.500m, measured radius 36.512m, radius deviation +12mm. Because +12mm exceeds the allowable range of ±10mm, the LED indicator (60) lights up red and prompts "adjust inward". The construction personnel rotate the connecting screw to move the upper opening of the inner template inward, and at the same time, the device can be repositioned and remeasured at any time. When the LED indicator (60) turns green and shows a deviation ≤10mm, if data needs to be saved, press the "confirm" key to save; otherwise, complete the operation directly.

[0040] After the inner formwork is fixed, the outer formwork is installed. At this point, construction workers use a steel tape measure to directly measure the distance between the top edges of the inner and outer formwork, compare it with the design wall thickness, and quickly adjust the position of the outer formwork. This method is simple and intuitive, conforms to on-site construction habits, and eliminates the need to use the wall thickness measurement mode of this device. If construction workers wish to record wall thickness data (e.g., quality inspection records), they can switch to "Wall Thickness Mode" at any time using the "Mode" key (see...). Figure 1 b) Perform two-point measurements and store them, but this is not necessary during the regular construction phase.

[0041] Example 6: Typical Operations in the Final Acceptance Phase – Using Radius Mode and Wall Thickness Mode in Combination After all the cylinder wall construction is completed, the project enters the final acceptance phase. At this time, a complete digital acceptance record needs to be generated.

[0042] First, remeasure the radius of the inner template's top opening using the radius mode. Place the device on the inner template's top opening, input the current elevation, select "radius mode," and the device will automatically measure. Press the "confirm" button, and the data will be automatically saved to the data recording module. Repeat this step to complete the radius measurement for all elevations across the entire tower. Each measurement data includes a timestamp and operator identification.

[0043] Secondly, switch to wall thickness mode using the "Mode" key and measure the distance between the inner and outer templates. The device prompts "Please measure the inner point" on the display screen (50). The construction personnel place the device on the upper opening of the inner template, press the measurement key, and the device automatically records the coordinates of the point through the RTK antenna (70). The device prompts "Please measure the outer point". The construction personnel place the device at the corresponding position on the upper opening of the outer template, press the measurement key, and the device automatically records the coordinates of the second point and calculates the actual wall thickness according to the spatial distance formula T_act = √[(X1-X2)²+(Y1-Y2)²+(Z1-Z2)²]. The display screen (50) shows: design wall thickness 0.500m, actual wall thickness 0.512m, wall thickness deviation +12mm. If it exceeds the allowable range, the LED indicator (60) lights up red and prompts "Adjust inward" (the outer template needs to be moved inward); if it is within the allowable range, press the "Confirm" key to store the data. Repeat this step to complete the wall thickness measurement of all elevations of the entire tower.

[0044] After all measurements are completed, the data is exported via the USB data synchronization interface (42) or the wireless communication module (44) to generate a total tower radius deviation record table and a wall thickness deviation record table. The data can be imported into the BIM system to generate a deviation chromatogram, which serves as a quantitative basis for final acceptance.

[0045] Example 7: Flexible mode switching in any scenario In practical use, construction workers can switch between the two modes at any time using the "Mode" button, without being restricted by stage. For example: During the construction phase, if it is necessary to verify the wall thickness at a certain point or retain inspection records, the wall thickness mode can be temporarily switched using the "Mode" key (see [link to relevant documentation]). Figure 1 b) Perform the measurement and store the data, then switch back to radius mode (see...). Figure 1 a) Continue working.

[0046] During the final acceptance phase, if only radius data is required, the radius mode can be used instead of the wall thickness mode.

[0047] The data storage of the two modes is independent and does not overlap with each other, and both have timestamps, elevation labels and operator IDs (which can be pre-entered via touch screen (50)).

[0048] This flexibility allows the device to adapt to the habits of different users and the requirements of different projects, satisfying the need for simplicity and efficiency during the construction phase (steel tape measure for the outer formwork), as well as the need for data integrity during the final acceptance phase (digital wall thickness measurement), and also supporting random inspection records during the construction process.

[0049] Example 8: Backup ranging scheme (RTK signal loss handling) For localized areas where RTK signals are obstructed (such as deep inside a cooling tower or areas obstructed by tall formwork), the device can automatically switch to laser ranging + tilt sensor mode. The principle of this backup solution is as follows: Two control points with known coordinates (such as permanent control stakes) are set at stable locations outside the tower body, and reflective prisms are installed at the control points. A laser rangefinder and tilt sensor are integrated at the bottom of the device. When the RTK signal is lost for more than 10 seconds, the control unit (30) automatically switches to standby mode and informs the user through the display screen (50) and audible and visual prompts. In standby mode, the device calculates the three-dimensional coordinates of the device by measuring the distance and angle to the two control points and using a spatial resection algorithm, and then calculates the measured radius or wall thickness. The user can also manually force the switch to standby mode through the touch screen (50).

[0050] The measurement accuracy of this backup solution is slightly lower than that of RTK mode (error approximately ±2cm), but it is sufficient to meet the basic requirements for construction and acceptance. The device can automatically switch back to RTK mode once the RTK signal is restored.

Claims

1. A template position verification and auxiliary diameter adjustment device for cooling tower wall construction, characterized in that, include: The shell has a base at the bottom that matches the top contour of the template; The elevation input module is used to input the current construction elevation; The storage unit contains pre-stored design radius and design wall thickness values ​​corresponding to each construction elevation provided by the design unit, as well as the plane coordinates of the cooling tower's central axis; Radius measurement module, used to measure the actual radius of the point where the device is placed; The control unit is connected to the elevation input module, the storage unit, and the radius measurement module respectively. It is used to retrieve the design radius or design wall thickness according to the input elevation, compare the measured value with the design value, and calculate the deviation. The display and prompt unit is used to display the current elevation, design value, measured value, deviation value, and adjustment direction; the adjustment direction includes "inward adjustment" and "outward adjustment". power supply.

2. The apparatus according to claim 1, characterized in that, The radius measurement module is an RTK positioning module. It obtains three-dimensional coordinates by receiving satellite positioning differential signals and calculates the horizontal distance to the central axis of the cooling tower as the measured radius, or calculates the measured wall thickness by measuring the coordinates of two points on the top of the inner and outer templates.

3. The apparatus according to claim 1, characterized in that, The display and prompting unit includes an LCD touch screen and a two-color LED indicator; the two-color LED indicator displays green when the deviation is within a preset allowable range and red when it exceeds the allowable range.

4. The apparatus according to claim 1, characterized in that, It also includes a data recording module, which automatically stores the elevation, measured value, design value, deviation and timestamp for each measurement.

5. The apparatus according to claim 4, characterized in that, The data recording module supports integration with Building Information Modeling (BIM) systems.

6. The apparatus according to claim 1, characterized in that, It also includes a wireless communication module for uploading measurement data to the construction management platform or cloud in real time.

7. The apparatus according to claim 1, characterized in that, The elevation input module includes a touchscreen numeric keypad and / or an elevation switching wheel.

8. The apparatus according to claim 1, characterized in that, It also includes a tilt sensor to correct for radius measurement errors caused by device tilt.

9. The apparatus according to claim 1, characterized in that, The control unit is also configured to calculate the difference between the actual elevation and the input elevation, and simultaneously display the actual elevation value and the difference on the display unit.

10. The apparatus according to claim 1, characterized in that, The control unit is also configured to automatically switch to standby ranging mode when the RTK signal is lost.

11. A method for verifying the position and assisting in diameter adjustment of a cooling tower template using the apparatus described in any one of claims 1 to 10, characterized in that, The process includes the following steps: Step A: Select either radius measurement mode or wall thickness measurement mode according to actual needs, and input the current construction elevation and allowable deviation; Step B: When it is necessary to measure the radius of the inner formwork, select the radius measurement mode, place the device on the top of the inner formwork, obtain the coordinates of a single point through RTK, calculate the measured radius using the formula R_act = √[(X-X0)²+(Y-Y0)²], retrieve the design radius for this elevation provided by the design unit from the storage unit for comparison, and adjust the position of the top of the inner formwork according to the deviation prompt "adjust inward" or "adjust outward", and save the data as needed; Step C: When it is necessary to measure the wall thickness and retain the data, select the wall thickness measurement mode, place the device on the top of the inner formwork and the top of the outer formwork respectively, obtain the coordinates of the two points, and use the spatial distance formula T_act = √[(X1-X2)²+(Y1-Y2)²+(Z1-Z2)²] Calculate the measured wall thickness, retrieve the design wall thickness for this elevation provided by the design unit from the storage unit for comparison, and adjust inward or outward according to the deviation prompts. Measurement data can be automatically stored as needed. Step D: The two modes can be switched at any time as needed without interference. During the construction phase, the positioning of the outer formwork is usually measured with a steel tape measure, so there is no need to use the wall thickness mode. During the completion and acceptance phase, the wall thickness mode can be used for comprehensive re-measurement and to form a digital acceptance record.

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