Pile foundation length precision detection system based on optical frequency domain reflection technology
The pile foundation length detection system using optical frequency domain reflection technology solves the problems of low accuracy and complex operation of traditional detection methods under complex geological conditions, and realizes high-precision, non-destructive pile foundation length detection, thereby improving detection efficiency and project progress.
Patent Information
- Application Number
- CN202520407062.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-10
AI Technical Summary
Traditional pile foundation testing methods suffer from low accuracy, complex operation, slow data processing, and poor non-destructive properties under complex geological conditions, which affect the testing results and project progress.
By employing optical frequency domain reflectance technology, and integrating the optical frequency domain reflectance measurement device, data processing and control system, and data processing and transmission system into an integrated box, high-precision, non-destructive pile length detection is achieved.
It improved detection accuracy, simplified operation procedures, enabled real-time data processing and non-destructive testing, and ensured the integrity of the pile foundation and the progress of the project.
Smart Images
Figure CN223826995U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of building detection, especially is involved in a pile foundation length precision detection system based on light frequency domain reflection technique. BACKGROUND
[0002] Pile foundation is an important part of civil engineering and construction, and its quality and length directly affect the stability and safety of the entire building structure. Currently, pile foundation detection mainly relies on traditional mechanical and acoustic detection techniques, such as dynamic testing method, static sounding method, low-strain reflected wave method, and high-strain method. These methods have been widely used in engineering practice, but there are also some significant problems.
[0003] Low detection accuracy: Traditional mechanical and acoustic detection methods are easily affected by environmental noise and soil medium inhomogeneity under complex geological conditions, resulting in low accuracy of detection results. Complex operation: Some detection methods require special equipment and complex operation modules, increasing the difficulty and cost of detection. Data processing lag: The data collection and processing speed of traditional methods is slow, and the length and quality information of pile foundation cannot be obtained in real time, affecting the engineering progress. Poor non-destructive: Some detection methods will cause certain damage to the pile foundation or surrounding soil, affecting the subsequent construction quality. SUMMARY
[0004] Therefore, the utility model aims to provide a pile foundation length precision detection system based on light frequency domain reflection technique, which solves at least one problem in the prior art. Through light frequency domain reflection technology, high-precision and non-destructive pile foundation length detection is achieved.
[0005] To achieve the above purpose, the technical scheme of the utility model is as follows:
[0006] A pile foundation length precision detection system based on light frequency domain reflection technology is installed in an integrated box, comprising a light frequency domain reflection measurement device, a data processing and control system, and a data processing and transmission system.
[0007] The light frequency domain reflection measurement device is used to obtain beat frequency signals; the beat frequency signals are converted into digital signals by an acquisition card and transmitted to the data processing and control system.
[0008] The data processing and control system is connected to the data processing and transmission system through a network interface or data line, and is used to display pile foundation length information.
[0009] The data processing and transmission system is used for storage and import and export of raw data and detection results.
[0010] Furthermore, the optical frequency domain reflectance measurement device includes a tunable laser, a first coupler, a polarization controller, a circulator, a second coupler, a balanced photodetector, and a data acquisition card;
[0011] The tunable laser is connected to a first coupler, which is connected to a polarization controller and a circulator;
[0012] The first coupler receives the optical signal from the tunable laser and transmits it to the polarization controller and the circulator;
[0013] The circulator and polarization controller are respectively connected to the second coupler. The circulator is used to input light into the optical fiber of the pile foundation under test, receive the backscattered Rayleigh light of the optical fiber under test, and transmit it to the second coupler.
[0014] The second coupler is connected to the balanced photodetector and is used to combine the reference light and the probe light into a composite optical signal and transmit it to the balanced photodetector.
[0015] The balanced photodetector is connected to the acquisition card. The balanced photodetector is used to perform beat frequency interference between the probe light and the reference light, and transmit the beat frequency signal to the acquisition card.
[0016] The acquisition card is used to convert optical signals into digital signals and transmit them to the data processing and control system for processing and analysis.
[0017] Furthermore, the data processing and control system includes interconnected computer terminals, displays, and control modules;
[0018] The computer terminal provides a platform and computing power for data processing; the display shows the control module and detection data; the control module sets the acquisition parameters and processes and analyzes the acquired data.
[0019] Furthermore, the data processing and transmission system includes data storage and data transmission; the data storage is used to store the original detection data and the detection results; the data transmission is used to import and export the original detection data and the detection results.
[0020] Furthermore, the integrated box includes a cover and a body, and the optical frequency domain reflectance measurement device, data processing and control system, and data processing and transmission system are installed inside the box. The cover and the body are detachably connected by bolts.
[0021] Furthermore, the inner surface of the lid is provided with several reinforcing ribs; a positioning post is provided at each of the four corners of the inner surface of the lid, and a screw hole is provided on the positioning post.
[0022] The box body is provided with a positioning seat at each of the four corners. The positioning seat has a No. 2 screw hole. By passing a bolt through the No. 2 screw hole and the No. 1 screw hole, the lid can be fixed to the box body.
[0023] Furthermore, the top of the box body has a stepped groove along the inner contour of the edge of the box body, and a positioning plate is provided on one side of the stepped groove. The positioning plate, the connecting groove and the box body form a positioning groove; the lower surface of the box cover is provided with a positioning block corresponding to the positioning groove.
[0024] Furthermore, each side of the box body has a notch, a latch is provided at the notch, and the box lid has a buckle corresponding to the latch.
[0025] Furthermore, the box body is provided with several partitions to divide the inner cavity of the box body; the box body is also provided with heat dissipation windows.
[0026] Compared with existing technologies, the precision pile foundation length detection system based on optical frequency domain reflection technology described in this utility model has the following advantages:
[0027] This invention discloses a precision pile foundation length detection system based on optical frequency domain reflection technology. Utilizing this technology, the system obtains pile foundation length information by detecting the backscattered Rayleigh light from the optical fiber inside the pile foundation. This overcomes the impact of environmental noise and soil inhomogeneity on detection accuracy in traditional methods, significantly improving accuracy. The system is easy to operate: integrating a tunable laser, coupler, polarization controller, circulator, balanced photodetector, and data acquisition card simplifies operation. The data processing and control system enables parameter setting, data acquisition control, and real-time data processing, quickly acquiring pile foundation length information, improving engineering inspection efficiency, and ensuring project progress. Users can complete the inspection operation through a computer terminal and control module, reducing operational difficulty and cost. It is a non-destructive testing method: optical frequency domain reflection technology is a non-destructive testing method that does not damage the pile foundation or surrounding soil, ensuring the integrity of the pile foundation and the quality of subsequent construction. Attached Figure Description
[0028] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:
[0029] Figure 1 This is a schematic diagram illustrating the workflow of a precision pile foundation length detection system based on optical frequency domain reflection technology, as described in an embodiment of this utility model.
[0030] Figure 2 This is a schematic diagram of the integrated box described in an embodiment of the present utility model;
[0031] Figure 3 This is a schematic diagram of the box lid according to an embodiment of the present utility model;
[0032] Figure 4 This is a schematic diagram of the box body according to an embodiment of the present utility model.
[0033] Explanation of reference numerals in the attached figures:
[0034] 1. Optical frequency domain reflectance measurement device; 2. Data processing and control system; 3. Data processing and transmission system; 41. Box body; 411. Positioning seat; 412. No. 2 screw hole; 413. Buckle; 414. Heat dissipation window; 415. Positioning groove; 42. Box cover; 421. Reinforcing rib; 422. Positioning post; 423. No. 1 screw hole; 424. Buckle; 425. Positioning block. Detailed Implementation
[0035] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and 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 a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.
[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0038] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0039] A precision pile foundation length detection system based on optical frequency domain reflectance technology is installed in an integrated box, such as... Figure 1 As shown, it includes an optical frequency domain reflectance measurement device, a data processing and control system, and a data processing and transmission system;
[0040] The optical frequency domain reflectance measurement device emits swept light through a tunable laser, receives backscattered Rayleigh light from the optical fiber inside the pile foundation under test, and obtains a beat frequency signal by performing beat frequency interference with a reference signal through a balanced photodetector. The acquisition card converts the beat frequency signal into a digital signal and transmits it to the data processing and control system.
[0041] The data processing and control system controls the measuring device through parameter settings, processes and analyzes the collected data, displays the pile foundation length information, and connects to the data processing and transmission system through a network interface or data cable.
[0042] The data processing and transmission system is used for storing, importing, and exporting raw data and test results.
[0043] Preferably, the optical frequency domain reflectance measurement device includes a tunable laser, a first coupler, a polarization controller, a circulator, a second coupler, a balanced photodetector, and a data acquisition card;
[0044] The tunable laser is connected to a first coupler, which is connected to a polarization controller and a circulator;
[0045] The first coupler can transmit optical signals of different frequencies emitted by the tunable laser to the polarization controller and the circulator in a ratio of 1:99 respectively;
[0046] The tunable laser is a semiconductor laser. By precisely controlling parameters such as the laser's driving current and temperature, it can emit continuous linearly swept light, providing a stable optical signal with a linearly variable frequency for measurement.
[0047] The polarization controller can make the optical power of the reference light and the probe light similar to improve the contrast of the beat frequency signal; the circulator can input light into the optical fiber of the pile foundation under test, receive the backscattered Rayleigh light of the optical fiber under test, and then transmit it to the second coupler.
[0048] The second coupler can combine the reference light and the probe light into a composite optical signal and transmit it to the balanced photodetector; the balanced photodetector can perform beat frequency interference between the probe light and the reference light and transmit the beat frequency signal to the acquisition card; the acquisition card can convert the optical signal into a digital signal and transmit it to the data processing and control system for subsequent processing, analysis and optimization; the data processing and control system is a PLC or a microcontroller, including interconnected computer terminals, displays and control modules.
[0049] The computer terminal provides a platform and computing power for data processing; the display shows the control module and detection data; the control module sets the acquisition parameters and processes and analyzes the acquired data.
[0050] Preferably, the data processing and transmission system includes data storage and data transmission; the data storage is used to store the original detection data and the detection results; the data transmission is used to import and export the original detection data and the detection results.
[0051] Preferred, such as Figures 2-4 As shown, the integrated box includes a cover 42 and a body 41. The optical frequency domain reflectance measurement device 1, the data processing and control system 2, and the data processing and transmission system 3 are installed inside the body 41. The cover 42 and the body 41 are detachably connected by bolts.
[0052] Preferably, the inner surface of the box cover 42 is provided with a plurality of reinforcing ribs 421; a positioning post 422 is provided at each of the four corners of the inner surface of the box cover 42, and a screw hole 423 is provided on the positioning post 422.
[0053] The box body 41 has a positioning seat 411 at each of its four corners. The positioning seat 411 has a second screw hole 412. By passing a bolt through the second screw hole 412 and the first screw hole 423, the box cover 42 and the box body 41 can be fixed together.
[0054] Preferably, the top of the box body 41 has a stepped groove along the inner contour of the edge of the box body 41, and a positioning plate is provided on one side of the stepped groove. The positioning plate, the connecting groove and the box body 41 form a positioning groove 415; the lower surface of the box cover 42 is provided with a positioning block 425 corresponding to the positioning groove 415.
[0055] Preferably, the box body 41 has a notch on each side, a latch 413 is provided at the notch, and the box cover 42 is provided with a buckle 424 corresponding to the latch 413.
[0056] Preferably, the box body 41 is provided with several partitions to divide the inner cavity of the box body 41; the box body 41 is also provided with heat dissipation windows 414.
[0057] Working principle of a precision pile foundation length detection system based on optical frequency domain reflection technology:
[0058] Preparation: Pre-install the optical fiber inside the pile foundation to be tested. Ensure the optical fiber is evenly distributed along the entire length of the pile foundation and in close contact with it;
[0059] Equipment Connection: Connect the input and output terminals of the circulator to the fiber optic interface of the pile foundation to be tested, and connect the power supply to ensure the normal power supply of the optical frequency domain reflectance (OFDR) measurement device; connect the output terminal of the acquisition card to the computer terminal;
[0060] System initialization: Open the computer terminal and set initial parameters in the user interface through the control module, such as the initial optical frequency of the light source, sweep speed, effective refractive index of the optical fiber, and sampling frequency of the data acquisition card. Confirm that all connections are normal and the system is running without errors;
[0061] Data Acquisition: The tunable laser is activated, emitting a linearly swept optical signal according to the set parameters. The optical signal is distributed via a first coupler to a polarization controller as a reference light and a circulator as a probe light. The circulator outputs the emitted optical signal to the optical fiber under test installed inside the pile foundation, collecting the backscattered Rayleigh light from the fiber. The collected optical signal is then transmitted via a second coupler along with the reference light emitted by the polarization controller to a balanced photodetector. The probe light and reference light undergo beat frequency interference, and the beat frequency signal is transmitted to the data acquisition card, converting the optical signal into a digital signal.
[0062] Data processing: The acquisition card converts the optical signal into a digital signal and transmits it to the computer terminal; the control module processes the signal, referring to the existing technology's formula for the beat frequency between the light and the probe light, f. b =γτ z =2n g γz / c(f b τ is the beat frequency, γ is the sweep speed of the laser, and τ is the frequency of the beat frequency. z Let n be the time delay between the backscattered Rayleigh light and the reference light at any point z in the fiber under test. g (where c is the effective refractive index of the optical fiber and c represents the speed of light in a vacuum). From this formula, we can know that the beat frequency signal f... b The time delay τ between the reference light and the probe light z Proportional, therefore, beat frequency f b Each point z in the fiber under test corresponds one-to-one with any point z in the fiber under test. Therefore, the beat frequency f is used to determine the position. b Calculate pile foundation length information;
[0063] The processing results are displayed on the monitor via a computer terminal, and users can view the data through the control module;
[0064] Data storage and transmission: Raw data and processed data are stored on storage devices to ensure long-term data preservation; if necessary, raw data and test results can be imported and exported through data transmission devices.
[0065] It should be noted that this application only improves the structure of the precision detection system and does not improve the control program. The control program and electrical components involved are all existing technologies.
[0066] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A precision pile foundation length detection system based on optical frequency domain reflection technology, installed in an integrated box, characterized in that: This includes an optical frequency domain reflectance measurement device, a data processing and control system, and a data processing and transmission system; The optical frequency domain reflectance measurement device is used to obtain the beat frequency signal; the beat frequency signal is converted into a digital signal by the acquisition card and transmitted to the data processing and control system; The data processing and control system is connected to the data processing and transmission system via a network interface or data cable to display pile foundation length information; The data processing and transmission system is used for storing, importing, and exporting raw data and detection results; The optical frequency domain reflectance measurement device includes a tunable laser, a first coupler, a polarization controller, a circulator, a second coupler, a balanced photodetector, and a data acquisition card. The tunable laser is connected to a first coupler, which is connected to a polarization controller and a circulator; The first coupler receives the optical signal from the tunable laser and transmits it to the polarization controller and the circulator; The circulator and polarization controller are respectively connected to the second coupler. The circulator is used to input light into the optical fiber of the pile foundation under test, receive the backscattered Rayleigh light of the optical fiber under test, and transmit it to the second coupler. The second coupler is connected to the balanced photodetector and is used to combine the reference light and the probe light into a composite optical signal and transmit it to the balanced photodetector. The balanced photodetector is connected to the acquisition card. The balanced photodetector is used to perform beat frequency interference between the probe light and the reference light, and transmit the beat frequency signal to the acquisition card. The acquisition card is used to convert optical signals into digital signals and transmit them to the data processing and control system.
2. The precision pile foundation length detection system based on optical frequency domain reflection technology according to claim 1, characterized in that: The data processing and control system includes interconnected computer terminals, displays, and control modules; The computer terminal provides a platform and computing power for data processing; the display shows the detection data; and the control module sets the acquisition parameters.
3. The precision pile foundation length detection system based on optical frequency domain reflection technology according to claim 1, characterized in that: The data processing and transmission system includes data storage and data transmission; the data storage is used to store the original detection data and the detection results; the data transmission is used to import and export the original detection data and the detection results.
4. The precision pile foundation length detection system based on optical frequency domain reflection technology according to claim 1, characterized in that: The integrated box includes a cover and a body. The optical frequency domain reflectance measurement device, data processing and control system, and data processing and transmission system are installed inside the box. The cover and the body are detachably connected by bolts.
5. The precision pile foundation length detection system based on optical frequency domain reflection technology according to claim 4, characterized in that: The inner surface of the box lid is provided with several reinforcing ribs; a positioning post is provided at each of the four corners of the inner surface of the box lid, and a screw hole is provided on the positioning post. The box body is provided with a positioning seat at each of the four corners. The positioning seat has a No. 2 screw hole. By passing a bolt through the No. 2 screw hole and the No. 1 screw hole, the lid can be fixed to the box body.
6. The precision pile foundation length detection system based on optical frequency domain reflection technology according to claim 4, characterized in that: The top of the box body has a stepped groove along the inner contour of the edge of the box body. A positioning plate is provided on one side of the stepped groove. A positioning groove is formed between the positioning plate, the connecting groove and the box body. The lower surface of the box cover is provided with a positioning block corresponding to the positioning groove.
7. The precision pile foundation length detection system based on optical frequency domain reflection technology according to claim 4, characterized in that: The box body has a notch on each side, and a latch is provided at the notch. The box lid has a buckle corresponding to the latch.
8. The precision pile foundation length detection system based on optical frequency domain reflection technology according to claim 4, characterized in that: The box body is provided with several partitions to divide the internal cavity of the box body; the box body is also provided with heat dissipation windows.