Method and device for generating results of inclination observation of existing building
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NINGBO POLYTECHNIC
- Filing Date
- 2026-03-13
- Publication Date
- 2026-06-12
Smart Images
Figure CN122192257A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of existing building observation technology, specifically to a method and apparatus for generating tilt observation results of existing buildings. Background Technology
[0002] Many existing buildings constructed in the mid-to-late 20th century and earlier are still in service. Due to long-term loads, natural material deterioration, external environmental influences, and construction variations, these buildings may exhibit overall tilting, localized deformation, and fluctuations in measured data during their use. To ensure the safety of these existing buildings, tilt monitoring is widely implemented in engineering practice. By strategically placing measuring points, observations of tilt angles, horizontal displacements, or tilt rates are obtained, providing a basis for building safety assessments, verification and evaluation, repair and reinforcement decisions, and monitoring.
[0003] The current process for acquiring and archiving tilt observation results of existing buildings has the following shortcomings: the observation elements required for tilt observation are scattered, making integration difficult; on-site personnel need to manually record observation readings or take on-site photos, and then office staff need to perform tilt angle conversion, displacement calculation, and tilt rate calculation, which involves many manual operations and is prone to errors; the existing process relies heavily on the experience of staff to judge whether the observation data is usable, lacking a quantitative evaluation mechanism and automatic gating methods for acquisition quality, calculation stability, and consistency deviation; the existing archiving methods mostly only retain result tables, requiring repeated searching of various original data during verification, which is not only inefficient but also makes it difficult to ensure the consistency of the results.
[0004] Therefore, how to overcome the shortcomings of traditional methods with effective methods has become a pressing technical problem that needs to be solved. Summary of the Invention
[0005] In response, the present invention provides a method and apparatus for generating tilt observation results of existing buildings, so as to at least partially solve the above-mentioned technical problems.
[0006] This invention provides a method for generating tilt observation results of existing buildings, comprising the following steps:
[0007] S1: Obtain the observation task document and template document, parse the observation elements in the observation task document, and construct the observation task based on the observation elements;
[0008] S2: According to the observation task, collect multi-source data from the field, including at least image data and attitude data;
[0009] S3: Based on the multi-source data at the site, a strategy of prioritizing reference verticality and selecting line features is adopted to determine the reference vertical direction. The reference vertical direction is then corrected by combining the attitude data to obtain the corrected reference vertical direction.
[0010] S4: Calculate the tilt parameters based on the corrected reference vertical direction and the target vertical direction, and construct the quality confidence level for performing quality gating to obtain the quality gating result;
[0011] S5: Generate observation results and evidence chains based on the quality gating results, and populate the observation results into the template document.
[0012] In one aspect of this application, the observation elements in step S1 include building identification, measurement point number, observation direction, height parameter, result field name, and writing location information.
[0013] In one aspect of this application, when constructing the observation task in step S1, a field mapping rule is established to unify observation-related fields with the same meaning into standard fields.
[0014] In one aspect of this application, the multi-source data in step S2 also includes instrument observation data, which is data collected by a theodolite, total station, laser plumb line or inclinometer.
[0015] In one aspect of this application, the strategy of prioritizing vertical references and selecting line features in step S3 specifically includes: prioritizing the identification of vertical reference objects set up on site; when no vertical reference object is identified, extracting vertical line features from the image data and obtaining the main vertical direction as the reference vertical direction through robust estimation.
[0016] In one aspect of this application, the tilt parameters in step S4 include tilt angle, horizontal displacement, and tilt rate.
[0017] In one aspect of this application, the quality confidence in step S4 is obtained by weighting several normalized quality sub-scores, wherein the quality sub-scores include at least a vertical line consistency sub-score, a acquisition stability sub-score, and a sharpness sub-score.
[0018] In one aspect of this application, the quality gating determines whether the observation result is valid by judging whether the quality confidence level reaches a preset threshold, and fills the template document with the valid observation result.
[0019] Another aspect of this application provides an apparatus for generating tilt observation results of existing buildings, used to implement the method for generating tilt observation results of existing buildings as described in any of the preceding claims, comprising the following modules:
[0020] The task parsing module is used to obtain observation task documents and template documents, parse the observation elements in the observation task documents, and construct observation tasks based on the observation elements.
[0021] The data acquisition module is used to acquire multi-source data from the field according to the observation task, wherein the multi-source data includes at least image data and attitude data;
[0022] The reference verticality determination module is used to determine the reference vertical direction based on the multi-source data in the field using a strategy of prioritizing reference verticality and selecting line features as alternatives, and to correct the reference vertical direction by combining the attitude data to obtain the corrected reference vertical direction.
[0023] The calculation module is used to calculate the tilt parameters based on the corrected reference vertical direction and the target vertical direction, and to construct the quality confidence score for performing quality gating to obtain the quality gating result;
[0024] The result generation module is used to generate observation results and evidence chains based on the quality gating results, and to populate the observation results into the template document.
[0025] In one aspect of this application, the data acquisition module is further provided with an acquisition auxiliary device for providing a vertical reference, wherein the acquisition auxiliary device is a calibration plate scale assembly or a mobile terminal fixing clamp.
[0026] The method and apparatus for generating tilt observation results of existing buildings provided in this invention have the following advantages: This invention analyzes the observation elements in the observation task document and constructs a unified observation task. Combined with attitude correction, it ensures the accuracy of tilt parameter calculation and implements quality gating, which can automatically remove results with poor acquisition quality, significantly improving the reliability and stability of the observation results. At the same time, it realizes the automatic filling of observation results into template documents and the generation and archiving of complete evidence chains, greatly reducing the workload of manual sorting, calculation and backfilling, and taking into account the efficiency of observation work and the traceability of results. Attached Figure Description
[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0028] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0029] Figure 1 This is a schematic diagram of a method for generating tilt observation results of an existing building according to an embodiment of the present invention;
[0030] Figure 2This is a schematic diagram of the structure of an existing building tilt observation result generation device provided in an embodiment of the present invention;
[0031] Figure 3 This is a schematic diagram of the calibration plate and scale assembly provided in an embodiment of the present invention;
[0032] Figure 4 This is a schematic diagram of a mobile terminal fixing fixture provided in an embodiment of the present invention. Detailed Implementation
[0033] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.
[0034] If the present invention involves orientation (e.g., up, down, left, right, front, back, outside, inside, etc.) when described, then the orientations involved need to be defined.
[0035] The scope of the embodiments described herein includes the entire scope of the claims and all available equivalents thereof. Throughout this document, the terms “first,” “second,” etc., are used only to distinguish one element from another without requiring or implying any actual relationship or order between the elements. Indeed, a first element can also be referred to as a second element, and vice versa. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a structure, apparatus, or device. Without further limitations, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the structure, apparatus, or device that includes said element. The various embodiments described herein are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably.
[0036] The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used herein to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the document and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. In the description herein, unless otherwise specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two elements; they can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0037] This application proposes a method and apparatus for generating tilt observation results of existing buildings. The technical solution of this application will be described in detail below with reference to various embodiments.
[0038] like Figure 1 As shown in the figure, this invention discloses a multi-data fusion method for ecological environment monitoring, including the following steps:
[0039] Step S1: Obtain the observation task document and template document, parse the observation elements in the observation task document, and construct the observation task based on the observation elements;
[0040] In practice, the observation task documents include, but are not limited to, observation task sheets, technical briefings, and measurement point layout instructions. These documents are stored in Word, PDF, or scanned form. The observation elements include at least building identification information, measurement point numbers and layout methods, observation direction, vertical distance, or elevation information. Subsequently, the observation elements in the observation task documents are analyzed through electronic processing. Specifically, for parsable Word or PDF documents, a combination of text extraction and table extraction can be used to obtain the text set; for scanned documents, OCR recognition can be used to obtain the text set, which is then subjected to noise reduction, line breaking and merging, unit symbol unification, and synonym normalization. Next, a field dictionary and rule base are constructed. The field dictionary covers descriptions such as measurement point direction and vertical distance, while the rule base includes regular expression rules and context discrimination rules. The context discrimination rules are used to distinguish between task configuration statements and explanatory statements, and to distinguish between measured value statements and standard limit value statements. Based on the field dictionary and the rule base, observation elements are identified and extracted from the text set. Specifically, the observation elements include building identifiers, measurement point numbers, observation directions, height parameters, result field names, and write location information. Observation tasks are constructed based on the observation elements, and field mapping rules are established. Observation-related fields with the same meaning are unified into standard fields. The write location information includes at least one of the following: table number and row / column coordinates, or content control identifier.
[0041] Step S2: According to the observation task, collect multi-source data from the field, including at least image data and attitude data;
[0042] Here, the attitude data can be obtained from the mobile terminal's sensors. The attitude data includes at least the roll angle φ and the pitch angle ψ, and the statistics of the attitude data within the acquisition time window are recorded to characterize the acquisition stability. In some specific embodiments, the multi-source data also includes instrument observation data, which is data collected by a theodolite, total station, laser plumb line, or inclinometer.
[0043] To meet quality control requirements, at least a preset number of n data acquisitions can be performed on the same measurement point in the same direction, and a unique data record entry can be generated for each acquisition. The data record entry includes at least the measurement point ID, direction, vertical distance, image, posture, instrument reading, operator identification, and timestamp, where n is a positive integer and n≥2.
[0044] Step S3: Based on the multi-source data at the site, a strategy of prioritizing reference verticality and selecting line features is adopted to determine the reference vertical direction. The reference vertical direction is then corrected by combining the attitude data to obtain the corrected reference vertical direction.
[0045] In some specific implementations, the strategy of prioritizing vertical references and selecting line features specifically includes: prioritizing the identification of vertical reference objects set up on-site; if no vertical reference object is identified, extracting vertical line features from the image data and using robust estimation to obtain the main vertical direction as the reference vertical direction. Specifically, when the image contains vertical reference objects such as plumb lines, laser lines, or ruler lines, the reference vertical direction vector is extracted from these vertical reference objects first. When the image does not contain vertical reference objects, line features such as the vertical edges of buildings, column edges, or window frame vertical edges are extracted from the image to form a candidate line segment set L={l j} and calculate the direction angle of each line segment. Line segment length len j and fitting confidence; robust statistical estimation is performed on the candidate line segment set to obtain the main vertical direction. ,in, The weight is determined by the line segment length len. j Determining the fit confidence level This is a robust loss function used to suppress the influence of outlier segments on the estimation results of the main vertical direction, thereby obtaining the reference vertical direction vector.
[0046] Subsequently, attitude correction is performed on the reference vertical direction based on the attitude data. Specifically, when the roll angle φ and pitch angle ψ exceed the preset threshold or the fluctuation exceeds the preset threshold during acquisition, the acquisition stability is determined to be insufficient, and the stability evaluation result is used for quality confidence calculation. At the same time, the reference vertical direction is corrected using the roll angle φ and pitch angle ψ to reduce the systematic error caused by shooting tilt.
[0047] Step S4: Calculate the tilt parameters based on the corrected reference vertical direction and the target vertical direction, and construct the quality confidence level for performing quality gating to obtain the quality gating result. The tilt parameters include tilt angle, horizontal displacement and tilt rate.
[0048] In each data collection and recording entry, the tilt angle is calculated based on the reference vertical direction and the target vertical direction, and the displacement and tilt rate are calculated based on the vertical distance. The target vertical direction is obtained from the building's vertical edge, facade vertical components, or through automatic identification. Specifically, , ,in, For displacement, Vertical distance The angle of inclination. The slope is then used. Following this, consistency checks and outlier removal are performed on multiple data collections from the same measurement point in the same direction. Specifically, the consistency check can be constructed based on the median and MAD (Median Absolute Deviation), removing outliers that satisfy |i... kOutlier results where |−m|>λ, where m is the median and λ is a preset threshold; after removing outliers, confidence-weighted fusion is used to obtain the tilt rate and displacement.
[0049] In this embodiment, the quality confidence is obtained by weighting several normalized quality sub-scores, and the quality sub-scores at least include a vertical line consistency sub-score, an acquisition stability sub-score, and a clarity sub-score. Here, the vertical line consistency sub-score is used to characterize the concentration degree of the directions of candidate vertical line segments and can be constructed by the variance of the direction angle. ; the acquisition stability sub-score is used to characterize the influence of the attitude fluctuation during the acquisition process on the result and can be constructed by the variance of the attitude angle. ; the clarity sub-score is used to characterize the availability of image texture and edge information and can be constructed and normalized by the variance of the Laplacian operator response. , where 、 、 、 、 are preset parameters or parameters calibrated from historical data; clip(·) means truncating the value to the range of 0 to 1.
[0050] The quality gating determines whether the observation result is valid by judging whether the quality confidence reaches a preset threshold C0 and fills the valid observation result into the template document; specifically, the quality confidence C can be expressed as: , , where are the quality sub-scores, are the corresponding weight coefficients; when C < C0, it is determined that the observation result in this direction at this measurement point is invalid, triggering a retest process and prohibiting backfilling; when C ≥ C0, it is determined that the observation result in this direction at this measurement point is valid.
[0051] Step S5: Generate an observation result and an evidence chain according to the quality gating result and fill the observation result into the template document.
[0052] In practice, the evidence chain at least includes the original image, an annotated image superimposed on the original image along the reference vertical direction, the target vertical direction, the tilt angle, the tilt rate, and the quality confidence level, attitude statistics, timestamps, operator identifiers, and task IDs. The observation results, after quality gating, are organized into structured row records, and the template document is automatically populated according to the field mapping rules and write location information. When the template document is writable, the data record entries are written to the corresponding cells; when the template document is not writable or the write location fails to locate, an appendix file containing a result table and an evidence chain index is generated, and a structured data file is simultaneously output for archiving. The data record entries and evidence chains are collected by building ID or project ID and written to an archive database, achieving centralized management of observation results from multiple measurement points and directions for the same building.
[0053] Figure 2 An apparatus 200 for generating tilt observation results of existing buildings is shown. This apparatus embodiment is similar to... Figure 1 Corresponding to the method embodiments shown, this device can be specifically applied to various electronic devices.
[0054] like Figure 2 As shown, the ecological environment monitoring device 200 provided in this application embodiment includes the following modules:
[0055] The task parsing module 201 is used to obtain the observation task document and template document, parse the observation elements in the observation task document, and construct the observation task based on the observation elements.
[0056] Data acquisition module 202 is used to acquire multi-source data from the field according to the observation task, wherein the multi-source data includes at least image data and attitude data;
[0057] The reference verticality determination module 203 is used to determine the reference vertical direction based on the multi-source data in the field using a strategy of prioritizing reference verticality and selecting line features as alternatives, and to correct the reference vertical direction by combining the attitude data to obtain the corrected reference vertical direction.
[0058] The calculation module 204 is used to calculate the tilt parameters based on the corrected reference vertical direction and the target vertical direction, and to construct the quality confidence score for performing quality gating to obtain the quality gating result;
[0059] The result generation module 205 is used to generate observation results and evidence chains based on the quality gating results, and to populate the observation results into the template document.
[0060] To improve the accuracy of vertical direction determination and the stability of data acquisition quality in situations where vertical references are scarce or shooting conditions are complex, some specific embodiments include an acquisition auxiliary device in the data acquisition module to provide a vertical reference. This acquisition auxiliary device can be a calibration plate / scale assembly or a mobile terminal fixing fixture. It is understood that this acquisition auxiliary device serves as an auxiliary reference component for mobile terminal image acquisition, improving the availability of the vertical reference, reducing the impact of attitude errors, and enhancing the verifiability of the evidence chain.
[0061] like Figure 3 As shown, the calibration plate scale assembly includes a plate body 61, vertical lines 62, a feature marking area 63, a scale calibration area 64, and a zero-point reference mark 65. The plate body 61 is a planar rigid component. The vertical lines are disposed on the surface of the plate body 61 to provide a vertical reference. The vertical lines 62 form a straight line feature on the plate body 61 that can be recognized by the image. The feature marking area 63 is used for automatic image positioning and recognition. The feature marking area 63 can be at least one of a QR code, AprilTag, ArUco mark, or other coded mark. The scale calibration area 64 provides a length scale or a known size reference for scale consistency verification or to assist in confirming the value of vertical distance when needed. The zero-point reference mark 65 provides a unified alignment reference for the scale zero point or reference height. The relative positions of the feature marking area 63 and the vertical lines 62 are predetermined and known, allowing the determination of the position, direction, and availability of the vertical lines 62 in the image after recognizing the feature marking area 63.
[0062] In step S3, when a calibration board is detected in the image, the reference vertical direction is extracted first from the vertical line 62; if the calibration board is not detected, robust estimation of vertical line features is performed to obtain the reference vertical direction. Furthermore, reliable identification of the calibration board can be used as one of the conditions for the vertical reference availability sub-score in the quality sub-score, thus increasing the confidence level when the vertical reference is reliable and decreasing the confidence level and triggering gated retesting when the vertical reference is missing or identification is unstable.
[0063] like Figure 4 As shown, the mobile terminal fixing fixture includes a vertical reference component and a terminal fixing part. The mobile terminal acquisition auxiliary fixture is used to detachably connect to the mobile terminal 73 to reduce shooting posture deviation and provide a visible or identifiable vertical reference.
[0064] The vertical reference component is used to provide a recognizable vertical reference to the image. The vertical reference component includes at least a vertical reference line 711 and a plumb bob 712. The vertical reference line 711 is a real, physical line that can be recognized by the camera and can enter the image field of view to form a straight line feature. The plumb bob 712 is used to maintain the verticality of the vertical reference line 711 under the action of gravity.
[0065] In some specific embodiments, the vertical reference assembly further includes a guide structure 713 for constraining the swing range or entry position of the vertical reference line 711, thereby improving the recognizability and stability of the vertical reference line 711.
[0066] In some specific embodiments, the vertical reference component further includes a camera recognition unit 74 for providing auxiliary recognition conditions for the vertical reference line 711 or feature marks. The camera recognition unit 74 may be a reflective structure, a supplementary lighting structure, an alignment indicator structure, or a combination thereof.
[0067] In steps S2 and S3, when the vertical reference line 711 enters the image field of view, the reference vertical direction is preferentially extracted using the vertical reference line 711; when the vertical reference line 711 does not enter the field of view or the recognition confidence is low, the process degenerates into robust estimation based on the vertical line features of the building to obtain the reference vertical direction. Furthermore, attitude sensor data can be used to quantitatively evaluate the acquisition stability and incorporate it into the quality confidence calculation.
[0068] This invention can be an apparatus, method, and / or computer program product. A computer program product may include a readable storage medium having computer-readable program instructions loaded thereon for causing a processor to implement various aspects of the invention.
[0069] Storage media can be tangible devices that hold and store instructions for use by instruction execution devices. Storage media can include, but are not limited to, electrical storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, or any suitable combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disc read-only memory (CD-ROM), digital multifunction disc (DVD), memory sticks, floppy disks, mechanical encoding devices, such as punch cards or recessed protrusions storing instructions thereon, and any suitable combination thereof.
[0070] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
[0071] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.
Claims
1. A method for generating tilt observation results of existing buildings, characterized in that, Includes the following steps: S1: Obtain the observation task document and template document, parse the observation elements in the observation task document, and construct the observation task based on the observation elements; S2: According to the observation task, collect multi-source data from the field, including at least image data and attitude data; S3: Based on the multi-source data at the site, a strategy of prioritizing reference verticality and selecting line features is adopted to determine the reference vertical direction. The reference vertical direction is then corrected by combining the attitude data to obtain the corrected reference vertical direction. S4: Calculate the tilt parameters based on the corrected reference vertical direction and the target vertical direction, and construct the quality confidence level for performing quality gating to obtain the quality gating result; S5: Generate observation results and evidence chains based on the quality gating results, and populate the observation results into the template document.
2. The method for generating tilt observation results of existing buildings according to claim 1, characterized in that, The observation elements in step S1 include building identification, measurement point number, observation direction, height parameter, result field name, and writing location information.
3. The method for generating tilt observation results of existing buildings according to claim 1, characterized in that, When constructing the observation task in step S1, a field mapping rule is established to unify observation-related fields with the same meaning into standard fields.
4. The method for generating tilt observation results of existing buildings according to claim 1, characterized in that, The multi-source data in step S2 also includes instrument observation data, which is data collected by theodolites, total stations, laser plumb bobs, or inclinometers.
5. The method for generating tilt observation results of existing buildings according to claim 1, characterized in that, The strategy of prioritizing vertical references and selecting line features in step S3 specifically includes: prioritizing the identification of vertical reference objects set up on site; if no vertical reference object is identified, extracting vertical line features from the image data and obtaining the main vertical direction as the reference vertical direction through robust estimation.
6. The method for generating tilt observation results of existing buildings according to claim 1, characterized in that, The tilt parameters in step S4 include tilt angle, horizontal displacement, and tilt rate.
7. The method for generating tilt observation results of existing buildings according to claim 1, characterized in that, The quality confidence score in step S4 is obtained by weighting several normalized quality sub-scores, which include at least the vertical line consistency sub-score, the acquisition stability sub-score, and the sharpness sub-score.
8. The method for generating tilt observation results of existing buildings according to claim 1, characterized in that, The quality gating determines whether the observation result is valid by judging whether the quality confidence level reaches a preset threshold, and fills the template document with the valid observation result.
9. A device for generating tilt observation results of existing buildings, used to implement the method for generating tilt observation results of existing buildings according to any one of claims 1 to 8, characterized in that, Includes the following modules: The task parsing module is used to obtain observation task documents and template documents, parse the observation elements in the observation task documents, and construct observation tasks based on the observation elements. The data acquisition module is used to acquire multi-source data from the field according to the observation task, wherein the multi-source data includes at least image data and attitude data; The reference verticality determination module is used to determine the reference vertical direction based on the multi-source data in the field using a strategy of prioritizing reference verticality and selecting line features as alternatives, and to correct the reference vertical direction by combining the attitude data to obtain the corrected reference vertical direction. The calculation module is used to calculate the tilt parameters based on the corrected reference vertical direction and the target vertical direction, and to construct the quality confidence score for performing quality gating to obtain the quality gating result; The result generation module is used to generate observation results and evidence chains based on the quality gating results, and to populate the observation results into the template document.
10. The device for generating tilt observation results of existing buildings according to claim 9, characterized in that, The data acquisition module is also equipped with an acquisition auxiliary device for providing vertical reference, which is a calibration plate scale assembly or a mobile terminal fixing fixture.