Engineering quality digital detection system

Abstract

The invention provides a project quality digital detection system and detection method, and belongs to the technical field of project quality detection.Real-time three-dimensional position coordinates of detection personnel are obtained through a mobile terminal, nearby to-be-detected components are calculated and recognized through spatial distance, and the spatial mapping relation between on-site actual components and BIM virtual components is established; the digital detection tool automatically transmits measurement data to the mobile terminal, the system extracts design requirement parameters from the database according to the corresponding relation of the components, automatic comparative analysis of the detection data and design standards is executed, and a real-time qualification judgment result is generated and fed back to the mobile terminal to be displayed. A rectification tracking ledger is established for unqualified projects for management, and the technical problem that field project quality detection data and BIM model design requirement data cannot be automatically correlated, compared and analyzed is solved.

Description

Technical Field

[0001] This invention belongs to the field of engineering quality testing technology, and more specifically, relates to a digital testing system for engineering quality. Background Technology

[0002] In the field of construction quality inspection, traditional methods rely primarily on inspectors carrying various tools to conduct manual measurements on-site. Data is recorded using paper forms, and the results are then manually compared and analyzed against design drawings to generate a quality inspection report. This traditional method is widely used in routine engineering quality inspection projects such as rebar tying, concrete strength testing, and protective layer thickness measurement. However, this traditional method suffers from drawbacks such as error-prone data recording, difficulty in locating components on-site, and time-consuming comparisons between test results and design requirements. Particularly with large-scale projects, inspectors often struggle to accurately identify the correspondence between the inspected components and those in the design drawings, making it difficult to correlate test data with design requirements. In the current BIM technology environment, because the actual measurement data obtained on-site and the design requirement data stored in the BIM model reside in different data systems, there is a lack of effective data correlation mechanisms. On-site inspectors cannot obtain the design requirement parameters of the inspected components in real time, nor can they automatically compare and analyze the test results with design standards, resulting in low quality inspection efficiency and susceptibility to human error. Summary of the Invention

[0003] In view of this, the present invention provides a digital inspection system and method for engineering quality, which can solve the technical problem in the prior art that on-site engineering quality inspection data and BIM model design requirement data cannot be automatically correlated and compared for analysis.

[0004] This invention is implemented as follows: The invention provides a digital inspection tool for engineering quality inspection system, comprising a data conversion module and a data transmission module. The data conversion module converts the component characteristic parameters obtained during inspection into digital signals, and the data transmission module transmits the digital signals to a mobile terminal. The mobile terminal includes a location acquisition module, a data receiving module, a distance sensing module, a display module, and a network communication module. The location acquisition module acquires the three-dimensional spatial location information of the mobile terminal, the data receiving module receives the digital signals transmitted by the digital inspection tool, the distance sensing module detects the distance between the digital inspection tool and the mobile terminal, the display module displays component information and inspection results, and the network communication module communicates with an engineering quality inspection management software server. The engineering quality inspection management software server includes a BIM model data management module, an inspection plan management module, a real-time positioning and component search module, an inspection guidance and data collection module, a comparative analysis module, and a rectification tracking module.

[0005] The second aspect of this invention provides a digital inspection method for engineering quality, specifically including the following steps: a component positioning step, establishing a mapping relationship between the three-dimensional space of the engineering site and the virtual three-dimensional space of the BIM model; a real-time location transmission step, in which a mobile terminal continuously acquires real-time location parameters and transmits them to the engineering quality inspection management software server; a component matching step, calculating the spatial distance between the mobile terminal position and the component position; an inspection data acquisition step, using a digital inspection tool to perform quality inspection on the component to be inspected; a distance verification step, verifying the distance between the digital inspection tool and the mobile terminal; a data transmission step, in which the mobile terminal sends the inspection data to the engineering quality inspection management software server; a comparative analysis step, comparing and analyzing the inspection data with design requirement information; a result feedback step, sending the compliance analysis results to the mobile terminal; and a rectification tracking step, establishing a rectification tracking ledger for inspection items that do not meet design requirements.

[0006] Specifically, the step of locating the component to be tested involves using the location acquisition module of a mobile terminal to obtain the three-dimensional coordinates of the first and second marker points at the engineering site, and then associating the three-dimensional coordinates of the first and second marker points with the corresponding marker points in the software system.

[0007] Specifically, the real-time location transmission step involves the mobile terminal continuously acquiring real-time location parameters through the location acquisition module and transmitting these parameters to the engineering quality inspection and management software server through the network communication module. The real-time location parameters include three-dimensional coordinate information.

[0008] Specifically, the component matching step involves the real-time positioning and component search module obtaining real-time location parameters, retrieving the component's position coordinates in the virtual space from the database, calculating the spatial distance between the real-time location parameters and the position coordinates, and then pushing the component summary information and spatial distance to the mobile terminal.

[0009] Specifically, the data acquisition step involves the following steps: when the mobile terminal approaches the component to be inspected, the display module shows a list of inspection items for the component; the operator uses a digital inspection tool to perform quality inspection on the component; and the digital inspection tool transmits the inspection data to the data receiving module of the mobile terminal via the data transmission module.

[0010] Specifically, the distance verification step involves the detection guidance and data collection module verifying the distance between the digital detection tool and the mobile terminal. If the distance exceeds a preset reasonable distance, the detection data will be rejected; if the distance is less than or equal to the preset reasonable distance, the detection data will be accepted.

[0011] Specifically, the data transmission step involves the mobile terminal sending the test data to the engineering quality testing management software server via a network communication module after all test items of the component to be tested are completed. The test data is encapsulated in a structured data format.

[0012] Specifically, the comparative analysis step involves the comparative analysis module retrieving the design requirement information of the corresponding component from the database, comparing and analyzing the test data with the design requirement information, and generating a conformity analysis result. The conformity analysis result includes a pass / fail judgment and a deviation analysis.

[0013] Specifically, the results feedback step involves the engineering quality testing and management software server sending the conformity analysis results to the mobile terminal. The mobile terminal then displays the conformity analysis results to the operator through a display module, including text descriptions and charts.

[0014] Specifically, the rectification tracking step involves the rectification tracking module establishing a rectification tracking ledger for testing items that do not meet design requirements. The rectification tracking ledger includes a problem description, responsible unit, rectification requirements, and completion deadline, and a workflow is used to manage the rectification process.

[0015] The digital testing tools include at least one of electronic calipers, electronic rebound hammers, and electromagnetic testing instruments. The component characteristic parameters include the diameter of the reinforcing bars, the spacing of the reinforcing bars, the concrete strength, and the thickness of the concrete cover. The data transmission module transmits data via Bluetooth communication or a wired data interface.

[0016] The mobile terminal's location acquisition module obtains three-dimensional spatial location information through a satellite positioning system or a positioning base station. The accuracy of the three-dimensional spatial location information is at the centimeter level. The distance sensing module uses Bluetooth signal strength or a dedicated ranging sensor to detect distance.

[0017] The BIM model data management module is used to process the model data output by the BIM modeling software, separating the three-dimensional geometric data and attribute information. The attribute information includes reinforcement design information and concrete design strength. The inspection plan management module is used to determine the components to be inspected and the inspection items.

[0018] The real-time positioning and component search module calculates the spatial distance between the real-time location coordinates of the mobile terminal and the location coordinates of the component to be detected, and identifies the components that meet the distance conditions as the components of immediate interest. The detection guidance and data collection module displays the detection guidance information on the mobile terminal.

[0019] The comparative analysis module uses statistical analysis methods to process the test data and makes a qualification judgment according to the national building engineering quality acceptance standards. The rectification tracking module uses workflow engine technology to realize the automated management of the rectification process and supports task assignment and progress tracking functions.

[0020] This invention establishes a spatial mapping relationship between the real-time positioning of a mobile terminal and the location of components in a BIM model. Combined with the automatic data transmission function of digital inspection tools, it achieves automatic association between on-site inspection data and design requirement data, solving the technical problem of the inability to automatically associate and compare on-site engineering quality inspection data with BIM model design requirement data. This invention utilizes the precise positioning function of the mobile terminal to obtain the real-time spatial location of the inspection personnel. Through spatial distance calculation, it automatically identifies the components to be inspected near the current location, thereby establishing an accurate correspondence between actual on-site components and virtual components in the BIM model, avoiding the component identification errors found in traditional methods. After the digital inspection tool completes the measurement, the inspection data is automatically transmitted to the mobile terminal. The system extracts the corresponding design requirement parameters from the database based on the established component correspondence, automatically performs a comparative analysis of the inspection data and design requirements, and generates real-time compliance judgment results. By constructing an automatic association mechanism between on-site inspection and BIM model data, this invention achieves the digitization and intelligentization of the quality inspection process, eliminates the error risks in manual data processing, and significantly improves the accuracy and reliability of the inspection results. In summary, this invention solves the technical problem mentioned in the background art of the inability to automatically associate and compare on-site engineering quality inspection data with BIM model design requirement data. Attached Figure Description

[0021] Figure 1 This is a flowchart of the method of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0023] The first aspect of this invention provides a digital inspection system for engineering quality, comprising: a digital inspection tool, a mobile terminal, and an engineering quality inspection management software server.

[0024] The digital testing tool includes at least one of electronic calipers, electronic rebound hammer, and electromagnetic detector. The digital testing tool has a data conversion module and a data transmission module. The data conversion module is used to convert the component characteristic parameters obtained by testing into digital signals. The component characteristic parameters include rebar diameter, rebar spacing, concrete strength, and concrete cover thickness. The data transmission module is used to transmit the digital signals to the mobile terminal via Bluetooth communication or a wired data interface.

[0025] Digital testing tools are tools used to test the characteristics of components in engineering projects. For example, electronic calipers can be used to test the diameter and spacing of steel bars, electronic rebound hammers can be used to test the strength of concrete, and electromagnetic testing instruments can be used to test the thickness of reinforced concrete cover. These different testing tools can be used to test different characteristics of components.

[0026] The mobile terminal includes a location acquisition module, a data receiving module, a distance sensing module, a display module, and a network communication module. The location acquisition module is used to acquire the three-dimensional spatial location information of the mobile terminal through a satellite positioning system or a positioning base station. The accuracy of the three-dimensional spatial location information is at the centimeter level. The data receiving module is used to receive digital signals transmitted by the digital inspection tool through Bluetooth communication or a wired data interface. The distance sensing module is used to detect the distance between the digital inspection tool and the mobile terminal. The display module is used to display component information and inspection results. The network communication module is used to communicate with the engineering quality inspection and management software server through the Internet.

[0027] Among them, the mobile terminal is a mobile device used for determining the location of engineering components on-site, acquiring data transmitted by digital inspection tools, and communicating with the backend server. Specifically:

[0028] 1) Component position determination: The mobile terminal can obtain spatial position information transmitted by satellite or positioning base station at any time with a position accuracy of centimeters. When the mobile terminal is close to a component, the position of the mobile terminal can be approximately identified as the spatial position of the component.

[0029] 2) Acquire data transmitted by digital testing tools: Receive data transmitted by digital testing tools via Bluetooth or wired data interface, and present the received data to operators according to business requirements through the mobile terminal function of the running engineering quality testing management software.

[0030] 3) Communication with the engineering quality inspection and management software server: Through its Internet connectivity, it sends its location information and on-site component quality inspection data to the engineering quality inspection and management software server, or receives relevant engineering data from the server and presents it to the operators.

[0031] The engineering quality inspection management software server includes a BIM model data management module, an inspection plan management module, a real-time positioning and component search module, an inspection guidance and data collection module, a comparative analysis module, and a rectification tracking module. The BIM model data management module receives BIM model data output by the BIM modeling software, separates and processes the 3D geometric data and attribute information from the BIM model data, performs lightweight processing on the 3D geometric data, and stores the attribute information in a database according to attribute categories. The attribute information includes reinforcement design information and concrete design strength. The inspection plan management module determines the components to be inspected, inspection items, inspection time, and inspection result review process according to engineering quality management requirements. The real-time positioning and component search module obtains the real-time 3D position coordinates P of the mobile terminal. t (X t Y t Z t ), calculate the real-time three-dimensional position coordinates P t (X t Y t Z t ) and the position coordinates P of the component to be detected i (X i Y i Z i Spatial distance D between ) i This will satisfy D i ≤D C The components defined by the condition are identified as components of immediate concern, where D C To establish a preset control distance, the detection guidance and data collection module is used to display the current component's detection items and detection guidance information on the mobile terminal, and to verify the distance D between the digital detection tool and the mobile terminal. j Does it satisfy D? j ≤D A Conditions, where D A To preset a reasonable distance, when the condition is met, the detection data sent by the digital detection tool is received. The comparison and analysis module is used to compare and analyze the detection data with the corresponding component design requirement information obtained from the database to generate a compliance analysis result. The rectification tracking module is used to establish a rectification tracking ledger for the detection items that do not meet the design requirements.

[0032] like Figure 1 As shown, the detection method provided by the second aspect of the present invention includes the following steps:

[0033] Step S01: Positioning of the component to be measured, using the location acquisition module of the mobile terminal to acquire the three-dimensional coordinates P of the first marker point at the engineering site. f1 (x f1 yf1 , z f1 ) and the three-dimensional coordinates P of the second marker point f2 (x f2 y f2 , z f2 ), and set the three-dimensional coordinates P of the first marker point f1 (x f1 y f1 , z f1 ) and the three-dimensional coordinates P of the second marker point f2 (x f2 y f2 , z f2 It associates with the corresponding markers in the software system to establish a mapping relationship between the three-dimensional space of the engineering site and the virtual three-dimensional space of the BIM model.

[0034] Step S02: Real-time location transmission step. Quality inspection personnel enter the inspection site holding the mobile terminal. The mobile terminal continuously acquires real-time location parameters P through the location acquisition module. t (X t Y t Z t The real-time location parameter P is transmitted through the network communication module. t (X t Y t Z t The data is transmitted to the engineering quality inspection and management software server.

[0035] Step S03: Component matching step, the real-time positioning and component search module obtains the real-time position parameter P. t (X t Y t Z t After that, retrieve the location coordinates P of the component related to the current detection task in virtual space from the database. i (X i Y i Z i ), calculate the real-time position parameter P t (X t Y t Z t ) and the position coordinates P i (X i Y i Z i Spatial distance D between ) i The component summary information and the spatial distance D i Pushed to the mobile terminal.

[0036] Step S04: Data acquisition step. When the mobile terminal approaches the component to be inspected, the display module displays a list of inspection items for the component to be inspected. The operator uses the digital inspection tool to perform quality inspection on the component to be inspected. The digital inspection tool transmits the inspection data to the data receiving module of the mobile terminal through the data transmission module.

[0037] Step S05: Distance verification step, the detection guidance and data collection module verifies the distance D between the digital detection tool and the mobile terminal. j When D j >D A When D refuses to receive detection data j ≤D A The detection data is received and displayed on the display module.

[0038] Step S06: Data transmission step. After all the inspection items of the component to be inspected are completed, the mobile terminal sends the inspection data to the engineering quality inspection management software server through the network communication module.

[0039] Step S07: Comparison and analysis step, the comparison and analysis module obtains the design requirement information of the corresponding component from the database, compares and analyzes the test data with the design requirement information, and generates a compliance analysis result.

[0040] Step S08: Result feedback step, the engineering quality inspection and management software server sends the conformity analysis result to the mobile terminal, and the mobile terminal displays the conformity analysis result to the operator through the display module.

[0041] Step S09: Rectification tracking step. For testing items that do not meet design requirements, the rectification tracking module establishes a rectification tracking ledger for tracking and management.

[0042] Wherein, the spatial distance D i The calculation formula is expressed as follows:

[0043]

[0044] Where L0 is the reference length, in meters.

[0045] The BIM model data is building information modeling data, the BIM modeling software is building information modeling software, the instant focus component is a focus component that meets the distance condition, the compliance analysis result is the comparative analysis result of the test data and the design requirements, and the rectification tracking log is a data table that records the rectification progress of non-conforming items.

[0046] The specific implementation methods of the above steps are described in detail below.

[0047] The specific implementation of step S01 involves the mobile terminal's position acquisition module using differential positioning technology to obtain the precise three-dimensional coordinates of the first and second marker points during the component positioning step. The least squares method is then used to calculate the coordinate system transformation parameters, establishing a seven-parameter transformation relationship between the on-site coordinate system and the BIM model coordinate system. The module uses an affine transformation matrix to achieve the mapping transformation between the two coordinate systems, with the transformation accuracy controlled within ±10mm. The transformation parameters include three translation parameters, three rotation parameters, and one scaling parameter, ensuring an accurate correspondence between the actual on-site position and the virtual model position.

[0048] The specific implementation of step S02 involves the mobile terminal using a multi-frequency GNSS receiver to simultaneously receive signals from the BeiDou-3 B1I and B3I bands and the GPS L1 and L2 bands during real-time location transmission. Centimeter-level accuracy positioning is achieved using the carrier phase differential positioning algorithm (RTK). Location data is collected and uploaded at a frequency of 1 Hz, using the NMEA0183 protocol standard, and includes parameters such as latitude, longitude, elevation, positioning quality factor, and number of satellites. Location information is transmitted to the server via the 4G network using the HTTP protocol, with transmission latency controlled within 100 ms.

[0049] The specific implementation of step S03 involves the real-time positioning and component search module in the component matching step employing spatial indexing technology to improve query efficiency and using an R-tree data structure to store the minimum bounding rectangle information of the components. When a mobile terminal location update is received, the module executes a range query algorithm to quickly locate the candidate component set in the R-tree, and then calculates the Euclidean distance between the mobile terminal location and the center point of each candidate component. The distance calculation is corrected using the great circle distance formula, taking into account the influence of the Earth's curvature. The query results are sorted in ascending order of distance, and the 15 closest components are selected and pushed to the mobile terminal. The pushed data includes information such as component number, component name, distance value, and detection status.

[0050] In step S04, the mobile terminal queries the corresponding test list from the test item configuration table based on the component type during the data acquisition step. The test list is then displayed in sorted order. When an operator initiates a test, the mobile terminal activates Bluetooth Low Energy (BLE) mode to scan for nearby digital testing tools. The scanning interval is set to 100ms, and the scanning window is set to 50ms. Compatible testing devices are identified through the device MAC address and service UUID. After establishing a connection, the mobile terminal, acting as the central device, sends a data request command to the testing tool. The testing tool, acting as a peripheral device, responds to the request and transmits measurement data.

[0051] The specific implementation of step S05 involves the mobile terminal estimating the distance between itself and the detection tool using the Bluetooth signal strength index (RSSI) value during the distance verification step. The relationship between the RSSI value and the distance is modeled using a logarithmic path loss model. The module first acquires the transmission power of the detection tool and the signal strength received by the mobile terminal, then calculates the estimated distance using the free space propagation loss formula. Environmental correction factors are set to 2.0 for indoor environments and 3.5 for outdoor environments. When the calculated distance exceeds a preset reasonable distance threshold, the system refuses to receive data and prompts the operator to move to a suitable location on the display interface. The threshold reference value is set to 5m.

[0052] In the specific implementation of step S06, during the data transmission step, the mobile terminal packages the complete set of detection data into a JSON format data packet. The data packet includes fields such as component identifier, detection time, detection personnel, detection items, measured values, and equipment information. Data transmission uses the HTTP POST method to send a request to the server, setting the Content-Type header to application / json, and employing GZIP compression to reduce the amount of data transmitted. After receiving the data, the server returns an acknowledgment response. The mobile terminal determines whether the transmission was successful based on the response status code. If transmission fails, it automatically retransmits, with a maximum of three retransmissions.

[0053] The specific implementation of step S07 involves the comparative analysis module querying the component's design parameters from the MySQL database. The query uses a JOIN join query to optimize performance. The module preprocesses the test data, removing outliers and noisy data, and uses the 3σ criterion to identify outliers. A data quality warning is triggered when the proportion of outlier data exceeds 20%. Statistical analysis uses descriptive statistical methods to calculate the sample mean, standard deviation, maximum value, and minimum value. The pass / fail determination uses a normal distribution hypothesis test method with a confidence level set at 95%. The test result is considered pass / fail when the confidence interval overlaps with the design requirement range.

[0054] In the specific implementation of step S08, the engineering quality inspection management software server encapsulates the analysis results into a response message and sends it to the mobile terminal during the result feedback step. The message format uses XML structured data and includes the inspection conclusions, deviation analysis, and improvement suggestions. After receiving the results, the mobile terminal displays them on the user interface using a combination of charts and text. Qualified items are marked in green, while unqualified items are marked in red with the deviation value highlighted. The system also supports exporting inspection reports in PDF format. The report template uses a predefined format and includes project information, inspection data, analysis results, and signature confirmation.

[0055] The specific implementation of step S09 involves the rectification tracking module employing workflow management technology to establish a standardized rectification process. The process nodes include problem confirmation, rectification plan formulation, rectification implementation, re-inspection and acceptance, and result confirmation. Each process node is configured with attributes such as responsible person, processing time limit, and approval authority. The flow conditions between nodes are controlled through a rule engine. The module provides real-time monitoring of rectification progress, using Gantt charts and milestone charts for visualization. The overdue warning threshold is set at 80% of the planned completion time; when the warning conditions are met, the system automatically sends emails and SMS reminders to relevant personnel.

[0056] Optionally, the digital testing tool uses the TIME2134 electronic caliper manufactured by Beijing Shidaizhifeng Technology Co., Ltd., with a measuring range of 0-200mm, accuracy of ±0.02mm, resolution of 0.01mm, operating temperature of -10-50℃, a built-in 3.7V lithium battery, a Bluetooth 4.0 communication module, a communication distance of 10m, and a data transmission rate of 1Mbps. The electronic rebound hammer uses the HT-75B concrete rebound hammer manufactured by Beijing Optek Technology Co., Ltd., with an impact energy of 2.207J, a hammer mass of 550g, a spring stiffness of 785N / m, a built-in ARM Cortex-M4 processor with an operating frequency of 168MHz, a storage capacity of 32MB, and a Bluetooth 5.0 module, supporting SPP and BLE communication protocols. The electromagnetic detector used is the ZBL-R630A rebar detector manufactured by Shanghai Ruqing Electronic Technology Co., Ltd., with a detection depth of 6-185mm, a rebar diameter range of 6-50mm, a measurement accuracy of ±1mm, a 3.5-inch TFT color LCD screen with a resolution of 320×240 pixels, a built-in ARM9 processor with a main frequency of 400MHz, and equipped with an RS485 interface and a wireless communication module.

[0057] Optionally, the mobile terminal uses the Renwoyou A50 handheld terminal manufactured by Beijing UniStrong Science & Technology Co., Ltd., equipped with a Qualcomm Snapdragon 660 processor with a main frequency of 2.2GHz, 6GB of RAM, 128GB of storage, a 5.5-inch high-definition screen with a resolution of 1920×1080 pixels, a built-in Beidou-3 and GPS dual-mode positioning chip with a positioning accuracy better than 1m, supports RTK real-time differential positioning with centimeter-level accuracy, is equipped with a Bluetooth 5.0 module, supports 802.11ac WiFi and 4G-LTE network communication, has a 4000mAh battery, an operating temperature range of -20~60℃, and an IP67 protection rating. The mobile terminal establishes a point-to-point connection with the digital detection tool via Bluetooth protocol, uses the GATT general attribute protocol for data exchange, and encapsulates data transmission in JSON format, including fields such as device identifier, timestamp, measurement value, and unit.

[0058] Optionally, the engineering quality inspection and management software server uses an NF5280M5 rack server manufactured by Inspur Group, configured with two Intel Xeon Silver 4214 processors, each with 12 cores and 24 threads, a base frequency of 2.2GHz, a maximum turbo frequency of 3.2GHz, 64GB of DDR4-2933 memory, a storage system consisting of four 2TB SAS hard drives forming a RAID10 array, four Gigabit Ethernet ports, a CentOS 7.8 operating system, and a MySQL 8.0 relational database management system. The server communicates with the mobile terminal via a TCP / IP protocol stack, provides a Web service interface using a RESTful API architecture, exchanges data in JSON and XML formats, and supports HTTPS encrypted transmission protocol to ensure data security.

[0059] It should be noted that this invention also solves the following technical problems: Existing technologies suffer from the difficulty in verifying the authenticity of measurement data from digital testing tools. In traditional engineering quality inspection processes, when inspectors use various digital testing equipment for on-site measurements, the lack of an effective data source verification mechanism makes it impossible to determine whether the received test data truly originates from the currently inspected component location, posing a risk of data misattribution or falsification. This invention establishes a distance sensing mechanism between the digital testing tool and the mobile terminal, monitoring the spatial distance between them in real time. When the distance exceeds a preset reasonable threshold, the measurement data is automatically rejected, ensuring that data transmission is only permitted when the testing tool and the mobile terminal are within a reasonable distance range, thereby guaranteeing the spatial consistency and reliability of the measurement data. Existing technologies also suffer from the technical problem of lacking systematic tracking and management of the engineering quality inspection process. In traditional testing methods, test results are usually stored in the form of paper reports, lacking an effective follow-up tracking mechanism for discovered quality problems. The rectification process is difficult to achieve closed-loop management, and the resolution of quality problems cannot be effectively monitored. This invention establishes a rectification tracking ledger system, which automatically creates rectification tasks for non-conforming items discovered during inspection. It adopts workflow technology to achieve standardized management of the rectification process, including task assignment, progress monitoring, and result acceptance, ensuring that quality issues are handled in a timely and effective manner. This achieves full-process digital tracking management from problem discovery to problem resolution.

[0060] Specifically, the principle of this invention is as follows: This invention solves the technical problem of the inability to automatically correlate and compare on-site engineering quality inspection data with BIM model design requirements data. Its fundamental principle lies in establishing a data correlation mechanism based on spatial location information. The key reason why traditional inspection methods cannot solve the data correlation problem is the lack of an accurate correspondence between actual on-site components and components in the design model. This invention introduces high-precision spatial positioning technology, uses a mobile terminal to obtain the real-time three-dimensional coordinates of the inspection personnel, and combines this with the component spatial location information stored in the BIM model. A spatial distance calculation algorithm is then used to automatically identify the target component corresponding to the current inspection location. This spatial location matching mechanism ensures an accurate one-to-one correspondence between on-site inspection activities and virtual model data, laying the foundation for subsequent data correlation analysis. After the digital inspection tool obtains the component characteristic parameters, the system uses the established component correspondence to automatically retrieve the corresponding component's design requirement parameters from the database and performs an automatic comparison between the inspection data and design standards using a preset comparative analysis algorithm. This automated data processing mechanism eliminates manual data matching and analysis, avoiding data correlation errors and analysis biases caused by manual operation. The reason why the technical solution of the present invention is logical is that spatial location information, as a natural bridge between the physical world and the virtual model, has the characteristics of uniqueness and accuracy. Through precise spatial positioning, it is possible to accurately identify the detection object in a complex engineering environment. The pre-stored component spatial coordinates and design parameters in the BIM model provide complete data support for automated data association.

[0061] The following is a specific embodiment 1 of the present invention: In a concrete structure quality inspection project of a 25-story residential building, a technical team used a digital engineering quality inspection system to conduct a comprehensive quality inspection of the 12th floor slab and beam-column structure. This floor contains 48 beam members, 36 column members, and 1200m... 2 For floor slab area, it is necessary to accurately test key quality parameters such as rebar diameter, rebar spacing, concrete strength, and concrete cover thickness.

[0062] The inspection team first established coordinate reference points at the construction site, and then used the location acquisition module of a mobile terminal to obtain the three-dimensional coordinates P of the marker point at the southeast corner of the building. f1 (125.342, 68.785, 36.240) and the three-dimensional coordinates P of the northwest corner marker. f2 (98.126, 95.432, 36.240), where the coordinate unit is meters. By associating these two marker points with corresponding marker points in the BIM model, a precise mapping relationship between the three-dimensional space of the engineering site and the virtual three-dimensional space of the BIM model was successfully established, with the spatial positioning accuracy of the coordinate system reaching the 3-centimeter level.

[0063] Quality inspection personnel are equipped with digital inspection tools such as electronic calipers, electronic rebound hammers, and electromagnetic detectors, as well as mobile terminal devices with centimeter-level positioning capabilities. The mobile terminal continuously acquires real-time location parameters via a satellite positioning system. When the inspection personnel move to the vicinity of the first beam component to be inspected, GL-12-01, the real-time location parameter of the mobile terminal is P. t (110.256, 82.173, 36.450), the position coordinates of this beam member in the BIM model are P. i (110.180, 82.210, 36.400).

[0064] The real-time positioning and component search module calculates the spatial distance D based on the spatial distance calculation formula. i :

[0065]

[0066] The calculation results show D i =0.092m, less than the preset control distance D C =0.5m, the system identifies the beam as a component of immediate concern and displays basic information such as component number GL-12-01, design strength grade C30, and main reinforcement specification $$25 on the mobile terminal display module.

[0067] The inspection guidance and data collection module displays a list of inspection items for the current component on the mobile terminal, including four inspection items: main reinforcement diameter inspection, stirrup spacing inspection, concrete cover thickness inspection, and concrete rebound strength inspection. The operator first uses electronic calipers to measure the diameter of the main reinforcement bars in the beam component. The measured data are 25.2mm, 24.8mm, 25.1mm, 24.9mm, and 25.0mm. The electronic calipers transmit the measurement data to the mobile terminal via Bluetooth.

[0068] The distance sensing module monitors the distance D between the digital detection tool and the mobile terminal in real time. j When D j When the distance is 0.8m, the detection guidance and data collection module verifies the distance condition, because D j =0.8m is greater than the preset reasonable distance D A =0.6m, the system refused to receive the detection data and prompted "Detection distance too far, please move closer to the component for detection". After the operator adjusted the position, D j Reduced to 0.4m, satisfying D j ≤D A Under the given conditions, the system successfully received the main reinforcement diameter detection data.

[0069] The stirrup spacing was measured using an electromagnetic detector. The stirrup spacings at the mid-span (1 / 4, 1 / 2, and 3 / 4) were 198mm, 201mm, and 195mm, respectively, all within the design accuracy range of 200mm ± 10mm. The concrete cover thickness was measured at the bottom (28mm, 27mm, 29mm) and the side (26mm, 25mm, 27mm). The data was transmitted to a mobile terminal via a wired data interface.

[0070] An electronic rebound hammer was used to test the concrete strength of the beam components on-site. Sixteen measuring points were evenly distributed on the surface of the components. The rebound values ​​ranged from 42.3 to 45.8, with an average rebound value of 44.2. Based on the rebound method testing standard, the estimated concrete strength was calculated to be 32.4 MPa. After all testing items were completed, the mobile terminal transmitted the test data to the engineering quality testing management software server via a 4G network. (See Table 1 for details.)

[0071] Table 1 Summary of Inspection Data for Beam Component GL-12-01

[0072] Testing items Design Requirements Test results Conformity assessment Main reinforcement diameter $$25 Average 24.96mm qualified Stirrup spacing 200mm±10mm Average 198mm qualified Bottom protective layer thickness 25mm±5mm Average 28mm qualified Side protective layer thickness 25mm±5mm Average 26mm qualified Concrete strength ≥30MPa 32.4MPa qualified

[0073] The comparative analysis module retrieves the design requirements information for beam member GL-12-01 from the database and compares the test data with the design standards item by item. The average diameter of the main reinforcement bars (24.96 mm) meets the allowable deviation range for 25mm steel bars; the average stirrup spacing (198 mm) is within the design requirement of 200mm ± 10mm; the protective layer thickness meets the design requirement of 25mm ± 5mm; and the estimated concrete strength (32.4 MPa) exceeds the 30 MPa requirement for the design strength grade C30. The system-generated compliance analysis results show that all test indicators for this member are qualified.

[0074] Continue testing of column member KZ-12-05. The coordinates of this member's location are P. i (105.820, 88.650, 36.400), the real-time location of the inspector's mobile terminal is P. t (105.795, 88.685, 36.420), calculate the spatial distance D. i =0.048m, less than the control distance D C The system identifies this component as a component of immediate interest. See Table 2 for details.

[0075] Table 2 Summary of Inspection Data for Column Component KZ-12-05

[0076] Testing items Design Requirements Test results Conformity assessment Longitudinal reinforcement diameter $$22 Average 21.8mm qualified Stirrup spacing 150mm±8mm Average 155mm Unqualified Protective layer thickness 30mm±5mm Average 24mm Unqualified Concrete strength ≥30MPa 28.6MPa Unqualified

[0077] The test results for column member KZ-12-05 showed that the stirrup spacing was 155mm, exceeding the allowable deviation range of 150mm±8mm required by the design; the average thickness of the protective layer was 24mm, which was less than the lower limit of 30mm±5mm required by the design; and the estimated concrete strength was 28.6MPa, which was lower than the 30MPa requirement for the design strength grade C30. The comparative analysis module determined that this member had three non-compliant items.

[0078] The rectification tracking module establishes a rectification tracking ledger for non-conforming items in column component KZ-12-05, recording information such as component number, description of non-conforming item, responsible person for rectification, rectification deadline, and rectification measures. The issue of out-of-tolerance stirrup spacing is classified as a general quality defect, requiring the construction unit to submit a rectification plan within 7 days; insufficient protective layer thickness and substandard concrete strength are classified as serious quality defects, requiring immediate work stoppage for rectification and a structural safety assessment. (See Table 3.)

[0079] Table 3 Statistical Analysis of Quality Inspection

[0080] Component type Number of tests Qualified quantity Quantity of non-conforming pass rate Beam components 48 45 3 93.8％ Column components 36 32 4 88.9％ floor slab 24 testing areas 22 2 91.7％ total 108 99 9 91.7％

[0081] After the inspection of all structural components on the 12th floor was completed, system statistics showed that 99 out of 108 inspected items were qualified, and 9 had quality defects, resulting in an overall pass rate of 91.7%. The non-compliant items mainly focused on insufficient concrete cover thickness, out-of-tolerance stirrup spacing, and low concrete strength. (See Table 4 for details.)

[0082] Table 4 Comparison and Analysis of Detection Efficiency

[0083] Detection method Average inspection time per component Data recording accuracy Report generation time Traditional manual inspection 25 minutes 87％ 2 hours Digital Inspection System 18 minutes 98％ 15 minutes Efficiency Improvement 28％ 12.6％ 87％

[0084] The digital inspection system for engineering quality of this invention represents a significant technological advancement compared to traditional manual inspection methods. In terms of inspection efficiency, the average inspection time for a single component is reduced from 25 minutes to 18 minutes, an improvement of 28%; data recording accuracy increases from 87% to 98%, reducing human error; and report generation time is reduced from 2 hours to 15 minutes, significantly improving data processing speed. Regarding inspection accuracy, the system achieves precise component positioning through centimeter-level positioning technology, avoiding component identification errors and missed inspections common in traditional methods; the application of digital inspection tools eliminates reading errors and improves the reliability of measurement data; and real-time comparison and analysis of BIM models and on-site inspection data makes quality assessment more objective and accurate. In terms of quality control, the system's established rectification tracking mechanism ensures closed-loop management of quality defects, increasing the rectification completion rate by 15% compared to the traditional manual tracking management model; real-time data transmission and cloud storage guarantee the integrity and traceability of inspection data, providing a reliable basis for subsequent quality analysis and responsibility determination.

[0085] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An engineering quality digital detection system, comprising a digital detection tool, a mobile terminal, an engineering quality detection management software server, characterized in that, The digital detection tool has a data conversion module and a data transmission module, the data conversion module is used for converting the component characteristic parameters obtained by detection into a digital signal, and the data transmission module is used for transmitting the digital signal to a mobile terminal; the mobile terminal includes a position acquisition module, a data receiving module, a distance sensing module, a display module, and a network communication module, the position acquisition module is used for acquiring three-dimensional space position information of the mobile terminal, the data receiving module is used for receiving the digital signal transmitted by the digital detection tool, the distance sensing module is used for detecting the distance between the digital detection tool and the mobile terminal, the display module is used for displaying component information and detection results, and the network communication module is used for data communication with an engineering quality detection management software server; The engineering quality detection management software server includes a BIM model data management module, a detection plan management module, a real-time positioning and component searching module, a detection guiding and data collecting module, a comparison and analysis module, and a rectification tracking module.

2. A method for quality engineering digital detection, characterized in that, Specifically includes the following steps: A component positioning step of establishing a mapping relationship between an engineering site three-dimensional space and a BIM model virtual three-dimensional space; a real-time position transmission step of continuously acquiring real-time position parameters by the mobile terminal and transmitting the real-time position parameters to the engineering quality detection management software server; A component matching step of calculating the spatial distance between the mobile terminal position and the component position; a detection data acquisition step of using the digital detection tool to detect the quality of the component to be detected; A distance verification step of verifying the distance between the digital detection tool and the mobile terminal; A data transmission step of sending the detection data to the engineering quality detection management software server by the mobile terminal; A comparison and analysis step of comparing and analyzing the detection data with design requirement information; A result feedback step of sending the conformity analysis result to the mobile terminal; A rectification tracking step of establishing a rectification tracking account for the detection item that does not meet the design requirement.

3. The method of claim 2, wherein, The component positioning step specifically uses the position acquisition module of the mobile terminal to acquire the three-dimensional coordinates of the first marker point and the three-dimensional coordinates of the second marker point at the engineering site, and associates the three-dimensional coordinates of the first marker point and the three-dimensional coordinates of the second marker point with the corresponding marker points in the software system.

4. The method of claim 3, wherein, The real-time position transmission step specifically continuously acquires real-time position parameters by the position acquisition module of the mobile terminal, and transmits the real-time position parameters to the engineering quality detection management software server through the network communication module, the real-time position parameters including three-dimensional coordinate information.

5. The method of claim 4, wherein, The component matching step specifically acquires the real-time position parameters by the real-time positioning and component searching module, calls the position coordinates of the component in the virtual space from the database, calculates the spatial distance between the real-time position parameters and the position coordinates, and pushes the component summary information and the spatial distance to the mobile terminal.

6. The method of claim 5, wherein, The detection data acquisition step specifically displays the detection item list of the component to be detected by the display module when the mobile terminal approaches the component to be detected, an operator uses the digital detection tool to detect the quality of the component to be detected, and the digital detection tool transmits the detection data to the data receiving module of the mobile terminal through the data transmission module.

7. The method of claim 6, wherein, The distance verification step specifically detects the distance between the guide and data collection module and the mobile terminal, and when the distance exceeds a preset reasonable distance, the detection data is rejected, and when the distance is less than or equal to the preset reasonable distance, the detection data is received.

8. The method of claim 7, wherein, The data transmission step specifically sends the detection data to the engineering quality detection management software server through the network communication module after all detection items of the to-be-detected component are completed, and the detection data is packaged in a structured data format.

9. The method of claim 8, wherein, The comparative analysis step specifically obtains the design requirement information of the corresponding component from the database through the comparative analysis module, compares and analyzes the detection data and the design requirement information, and generates a conformity analysis result, which includes a pass judgment and a deviation analysis.

10. The method of claim 9, wherein, The result feedback step specifically sends the conformity analysis result to the mobile terminal through the engineering quality detection management software server, and displays the conformity analysis result to the operator through the display module, including text description and chart display.

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