CN-122017010-A - Mud sand content detecting system based on ultrasonic attenuation and optical image bimodal fusion

CN122017010ACN 122017010 ACN122017010 ACN 122017010ACN-122017010-A

Abstract

The invention discloses a mud sand content detection system based on dual-mode fusion of ultrasonic attenuation and an optical image, which is characterized by comprising a middle connecting pipe, a detection pipeline, an ultrasonic detection unit, an optical image acquisition unit, a diffuse reflection light source, an illumination sensor, a steady flow pump, a data processing module and a fusion early warning module. The method solves the problems of lag detection, insufficient precision, incapability of real-time monitoring and the like existing in the existing slurry sand content detection method.

Inventors

ZHOU PU
OUYANG PENGBO
LUO GUIJUN
ZHANG CAN
Xiao Xiangnan
ZHONG FENG
WU TAIJIN
WU ZHANQI
CHEN YAJUN
SU SICHENG

Assignees

中建五局土木工程有限公司

Dates

Publication Date: 20260512
Application Date: 20251218

Claims (10)

1. The utility model provides a mud sand content detecting system based on ultrasonic attenuation and optical image bimodal fuses which characterized in that includes: the middle connecting pipe (1) is detachably connected to the construction slurry circulation pipeline (11) in series; The detection pipeline (2), a feed inlet of the detection pipeline (2) is communicated with the bottom of the upstream end of the middle connecting pipe (1), and transparent windows (201) are symmetrically arranged on the upper side and the lower side of the detection pipeline (2); The ultrasonic detection unit (3), the said ultrasonic detection module (3) is set up in detecting the pipeline (2), in order to transmit the ultrasonic wave to the mud in the feed pipe (201), and gather and transmit to the data processing unit through the initial ultrasonic signal and attenuation ultrasonic signal before and after the mud propagates; The optical image acquisition unit (4) is arranged towards the transparent window (201) and is used for acquiring the mud flow image in the detection pipeline (2) and sending the mud flow image to the data processing unit; A diffuse reflection light source (7), the diffuse reflection light source (7) being arranged around the optical image acquisition unit (4) for providing constant illumination to the transparent window (201); The illumination sensor (10) is arranged at the other side of the transparent window (201) relative to the diffuse reflection light source (7) and is used for collecting illumination intensity values of the diffuse reflection light source (7) after illumination of the diffuse reflection light source (7) penetrates through mud in the detection pipeline (2) and sending the illumination intensity values to the data processing unit; The steady flow pump (5) is arranged on the detection pipeline (2) and is used for pumping the slurry conveyed in the middle connecting pipe (1) into the detection pipeline (2) at a constant flow rate; The data processing unit comprises an initial ultrasonic signal and an attenuated ultrasonic signal, an analysis module, a light intensity value acquisition module, a slurry turbidity F acquisition module, a slurry flow image preprocessing module, a sand identification module and a sand analysis module, wherein the initial ultrasonic signal and the attenuated ultrasonic signal are analyzed and compared to acquire an ultrasonic characteristic parameter variation of the ultrasonic signal after the ultrasonic signal is transmitted by slurry, and a first slurry sand content P 1 is calculated according to a relation model of the ultrasonic characteristic parameter variation and the slurry sand content; The data fusion module comprises a data fusion module and a construction control center, wherein the data fusion module is used for carrying out weighted fusion on the first slurry sand content P 1 and the second slurry sand content P 2 according to the slurry turbidity F, calculating the final slurry sand content P 3 , comparing the final slurry sand content P 3 with the preset slurry sand content P 0 , and sending alarm information to the construction control center if the P 3 is larger than the P 0 .
2. The system for detecting the sand content of the slurry based on the dual-mode fusion of ultrasonic attenuation and optical images according to claim 1, wherein the detection pipeline (2) is provided with an optical image acquisition section (202) with a rectangular flow passage section, and the transparent window (201) is arranged on the optical image acquisition section (202).
3. The system for detecting the sand content of the slurry based on the dual-mode fusion of ultrasonic attenuation and optical images as claimed in claim 1, wherein the calculation method of the turbidity F of the slurry is F= (L 0 -L 1 ）/L 0 , wherein L 1 is an attenuation illumination value, namely an illumination intensity value of the diffuse reflection light source (7) after illumination transmitted through the slurry in the detection pipeline (2) when the slurry is conveyed in the detection pipeline (2), the unit is lx, and L 0 is an initial illumination value, namely an illumination intensity value of the diffuse reflection light source (7) after illumination transmitted through the clear water in the detection pipeline (2) when the clear water is conveyed in the detection pipeline (2), and the unit is lx.
4. The system for detecting the sand content of the slurry based on the bimodal fusion of ultrasonic attenuation and optical images of claim 1, wherein the calculation method of the second sand content P 2 is P 2= S 1 /S 0 , wherein S 1 is the area of sand with the particle size of more than 200 meshes in a slurry flow image, and the unit cm 3 ;S 0 is the area of the slurry flow image and the unit cm 3 .
5. The system of claim 4 wherein the data processing module, when calculating the second sand content P 2 , divides the sand into true sand and false sand according to the morphological characteristics of the sand, analyzes the area ratio of the true sand in the slurry flow image to calculate the second sand content P 2 , and calculates the second sand content P 2 by P 2= S 1 '/S 0 , wherein S 1 ' is the area of the true sand with a particle size greater than 200 meshes in the slurry flow image, and cm 3 ;S 0 is the area of the slurry flow image, and cm 3 .
6. The system for detecting the sand content of the slurry based on the dual-mode fusion of ultrasonic attenuation and optical images of claim 1, wherein the final sand content P 3 is calculated by P 3 =（F×P 1 ）+（1-F）×P 2 , and the turbidity F of the slurry is a percentage value.
7. The system for detecting the sand content of the slurry based on the dual-mode fusion of ultrasonic attenuation and optical images according to claim 1, further comprising a model building module, wherein the model building module comprises a relation model for inputting ultrasonic characteristic parameters and the sand content of the slurry and sending the relation model to a data processing module, and the model building module is used for analyzing and obtaining the variation of the ultrasonic characteristic parameters of the slurry ultrasonic signals of the sample before and after the slurry is transmitted according to a slurry sample with known sand content and building or updating the relation model of the ultrasonic characteristic parameters and the sand content of the slurry.
8. The system for detecting the sand content of slurry based on the dual-mode fusion of ultrasonic attenuation and optical images according to claim 7, wherein the ultrasonic characteristic parameters comprise ultrasonic attenuation amplitude, ultrasonic phase change and ultrasonic scattering intensity.
9. The mud sand content detection system based on the dual-mode fusion of ultrasonic attenuation and optical images as set forth in claim 1, further comprising: The device comprises a mud transfer box (12), wherein an overflow vent (1201) is formed in the top of one side of the mud transfer box (12), and a discharge port of the detection pipeline (2) is communicated with the mud transfer box (12); The return pipe (6), one end of the return pipe (6) extends to the bottom of the mud transfer box (12), the other end of the return pipe is communicated with the bottom of the downstream end of the middle connecting pipe (1), and a return pump (601) is arranged on the return pipe (6).
10. The mud sand content detection system based on the dual-mode fusion of ultrasonic attenuation and optical images as set forth in claim 1, further comprising: The top of the slurry supply bin (8) is open and is communicated with the bottom of the upstream end of the middle connecting pipe (1), and the feed port of the detection pipeline (2) is communicated with the bottom of the slurry supply bin (8); Stirring subassembly (9), stirring subassembly (9) are including one end and well takeover (1) top rotation connection, the other end extends to inside pivot (901) of mud feed bin (8), pivot (901) are connected with stirring vane (902) and driving vane (903) respectively in mud feed bin (8), the position of well takeover (1).

Description

Mud sand content detecting system based on ultrasonic attenuation and optical image bimodal fusion Technical Field The invention belongs to the technical field of intelligent sensing, and particularly relates to a device and a method for detecting the sand content of slurry based on dual-mode fusion of ultrasonic attenuation and optical images. Background In the pile foundation construction process, the slurry is used as an important medium for hole wall protection and hole forming stability, and the performance of the slurry is directly related to pile forming quality and construction safety. The sand content of the slurry is used as a key parameter, and too high can lead to the increase of friction resistance of the hole wall, instability of the slurry and even hole collapse, and too low can affect the wall protection effect and suspension capability of the slurry. Therefore, the method for accurately and timely monitoring the sand content of the slurry is one of the key links for ensuring the construction quality. The currently commonly used detection method for the sand content of the slurry mainly comprises a screening method and a sedimentation method. The sieving method needs manual sampling, the slurry sample is weighed after being separated, washed and dried by a screen, the sand content is calculated, and the sedimentation method utilizes the density difference of sand and argillaceous particles to obtain the sand proportion through natural sedimentation or centrifugal separation. Although theoretically reflecting sand content, these methods have significant limitations. Firstly, the detection methods rely on manual operation, and require steps of sampling, cleaning, drying, weighing and the like, and the process is complex and takes a long time. Often, the detection needs tens of minutes or even longer, and the requirement of 'real-time monitoring and quick response' of a construction site cannot be met. Especially in the construction of a large amount of pile foundations, mud circulation is frequently changed, and a lagged detection result often cannot guide on-site construction adjustment in time. Second, the conventional method has insufficient accuracy in a highly turbid or fine particle mixed slurry environment. Because the grain sizes of sand grains and argillaceous grains are close, and transitional grains such as silt and silt are always present in slurry, the traditional physical separation method is difficult to distinguish accurately, and the error of the detection result is larger. Especially at higher fine particle contents, the sand content is easily underestimated, thereby posing engineering quality risks. In summary, the existing slurry sand content detection method generally has the problems of lag detection, limited precision, poor real-time performance and insufficient environmental adaptability, and is difficult to meet the urgent requirements of modern pile foundation construction on efficient and intelligent detection. Therefore, it is needed to provide a novel sand content detection technology capable of combining various detection advantages to realize real-time online monitoring, precision improvement and complex environment adaptation so as to ensure the safety and quality of pile foundation construction. Disclosure of Invention The invention provides a mud sand content detection system based on dual-mode fusion of ultrasonic attenuation and an optical image, which solves the problems of detection lag, insufficient precision, incapability of real-time monitoring and the like of the existing mud sand content detection method. The invention is realized by the following technical scheme. The utility model provides a mud sand content detecting system based on ultrasonic attenuation and optical image bimodal fuses which characterized in that includes: the middle connecting pipe is detachably connected in series to a construction slurry circulating pipeline; The feeding port of the detection pipeline is communicated with the bottom of the upstream end of the middle connecting pipe, and transparent windows are symmetrically arranged on the upper side and the lower side of the detection pipeline; The ultrasonic detection module is arranged on the detection pipeline and used for transmitting ultrasonic waves to the slurry in the feeding pipe, collecting initial ultrasonic signals before and after the slurry is transmitted and transmitting the initial ultrasonic signals and attenuated ultrasonic signals to the data processing unit; the optical image acquisition unit is arranged towards the transparent window and is used for acquiring the mud flow image in the detection pipeline and sending the mud flow image to the data processing unit; The diffuse reflection light source is arranged around the optical image acquisition unit and used for providing constant illumination for the transparent window; The illumination sensor is arranged on the other side of the transparent window relat