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CN-122017209-A - Foam concrete filling degree monitoring device with pressure sensing array

CN122017209ACN 122017209 ACN122017209 ACN 122017209ACN-122017209-A

Abstract

The invention discloses a foam concrete filling degree monitoring device with a pressure sensing array, which comprises a flexible substrate, the pressure sensing array, a signal acquisition module, a data processing unit, a display and early warning module and a power supply communication unit. The pressure sensing array is distributed on the flexible substrate in a matrix form, foam concrete pressure signals are collected in real time, the data processing unit judges the filling state through a threshold value, a visual cloud chart is generated, and a cavity and an underfilling area are positioned and early warned. The invention can realize global, real-time and accurate monitoring, is suitable for foam concrete construction scenes such as pipe gallery, foundation pit, roof and the like, obviously improves construction quality and reduces reworking cost.

Inventors

  • SHUAI JIE

Assignees

  • 姚帅杰

Dates

Publication Date
20260512
Application Date
20260319

Claims (8)

  1. 1. The foam concrete filling degree monitoring device with the pressure sensing array is characterized by comprising a flexible substrate, the pressure sensing array, a signal acquisition module, a data processing unit and a display and early warning module, wherein the pressure sensing array is formed by distributing a plurality of miniature pressure sensors on the flexible substrate in a matrix mode and is used for acquiring pressure signals of all measuring points in the pouring process, the signal acquisition module is connected with the pressure sensing array to finish signal amplification, filtering and A/D conversion, the data processing unit judges the threshold value of the pressure signals to generate a filling degree cloud chart and position a defect area, and the display and early warning module is used for realizing visual display and abnormal warning.
  2. 2. The device of claim 1, wherein the flexible substrate is a waterproof and corrosion-resistant flexible film with a thickness of 0.5-2mm, is bendable, cut, fitted to the profiled casting surface, and is reusable.
  3. 3. The device of claim 1, wherein the miniature pressure sensor is a film pressure sensor, the monitoring area is 1-5cm < 2 >, the measuring range is 0-100kPa, the precision is not lower than +/-0.5 kPa, the response time is less than or equal to 10ms, the sensor spacing is 5-10cm, and each sensor has a unique position number.
  4. 4. The apparatus of claim 1, wherein the signal acquisition module supports a wired shielded cable or wireless bluetooth/ZigBee communication.
  5. 5. The apparatus of claim 1, wherein the data processing unit is configured to perform pressure threshold comparison, filling/underfilling/void state determination, filling degree thermodynamic cloud image generation, defect localization, and data storage.
  6. 6. The device of claim 1, wherein the display and pre-warning module comprises a touch display screen, an audible and visual alarm, and a 4G/5G/Wi-Fi wireless communication unit, and is capable of displaying and remotely transmitting monitoring data on site.
  7. 7. The device of claim 1, further comprising a power supply and communication unit powered by a lithium battery or an external power source, wherein the modules cooperate via a bus.
  8. 8. A method for monitoring the filling level of foam concrete based on the device according to any one of claims 1 to 7, characterized by comprising the steps of: (1) Cutting the flexible substrate according to the size of the pouring area, and arranging a pressure sensing array to finish calibration and debugging; (2) Paving the device at a preset monitoring position and fixing the device; (3) Collecting pressure signals in real time in the pouring process, and judging filling states of all points; (4) Generating a filling degree cloud picture, positioning the underfilling and void areas and early warning; (5) The constructor adjusts the pouring process according to the early warning; (6) After pouring is completed, data are stored and a detection report is generated; (7) And (5) dismantling, cleaning and reusing the device after construction.

Description

Foam concrete filling degree monitoring device with pressure sensing array Technical Field The invention belongs to the technical field of building engineering monitoring, and particularly relates to a device for realizing real-time monitoring, cavity positioning and early warning of filling degree in a foam concrete pouring process based on a pressure sensing array. Background The foam concrete is widely applied to projects such as foundation pit backfill, underground pipe gallery filling, roof slope finding, road and bridge cushion layer and the like due to the characteristics of light weight, heat preservation, self leveling and the like. However, in actual construction, the quality defects such as local cavities, underfilling and insufficient compactness are extremely easy to occur due to the reasons of high viscosity, uneven flowability, complex pouring path, shielding of steel bars and pipelines and the like of the foam concrete. The traditional detection method mainly depends on modes such as manual knocking, later core drilling, appearance observation and the like, and has obvious defects: 1. after detection, the molding is carried out when the problem is found, and the reworking cost is high; 2. The pouring process cannot be monitored in real time and in a global manner; 3. the single-point detection precision is low, and the micro holes and dead angles are difficult to identify; 4. The subjectivity of the manual judgment is strong, and the data is not traceable. In the prior art, a small amount of pressure or liquid level sensors are adopted, but single-point monitoring is adopted, a planar monitoring network cannot be formed, and the capacity of identifying the filling state of a complex cavity is poor. Therefore, developing a foam concrete filling degree monitoring device with global coverage, real-time accuracy and visualization has important engineering value. In the prior art, a small amount of pressure or liquid level sensors are adopted, but single-point monitoring is adopted, a planar monitoring network cannot be formed, and the capacity of identifying the filling state of a complex cavity is poor. Therefore, developing a foam concrete filling degree monitoring device with global coverage, real-time accuracy and visualization has important engineering value. Disclosure of Invention 1. Object of the invention Aiming at the defects of the prior art, the invention provides the foam concrete filling degree monitoring device with the pressure sensing array, which realizes the global, real-time and visual monitoring of the pouring process, accurately positions the cavity and the underfilling area, guides the construction to adjust in time, improves the pouring quality and reduces the reworking cost. 2. Technical proposal A foam concrete filling degree monitoring device with a pressure sensing array comprises a flexible substrate, the pressure sensing array, a signal acquisition module, a data processing unit, a display and early warning module and a power supply and communication unit. (1) Flexible substrate Waterproof, corrosion-resistant and flexible film materials such as TPU, PVC or silica gel films with the thickness of 0.5-2mm are adopted, and the special-shaped structure such as foundation pit, pipe gallery and roof is bendable and cut and is fit for paving, recycling and reusing. The edge of the substrate is provided with a sealing interface to prevent the slurry from penetrating into and damaging the circuit. (2) Pressure sensing array The micro film pressure sensors are uniformly distributed on the flexible substrate in a matrix form. Sensor parameters: -a monitoring area of 1-5cm2; -measuring range 0-100kPa; -the precision is not less than + -0.5 kPa; -response time ∈10ms; -sensor spacing 5-10cm. Each sensor has a unique number for positioning. When the sensor is covered and compacted by the foam concrete, the pressure rises and exceeds a threshold value, and is determined to be filled. (3) Signal acquisition module And the pressure sensing array is connected with the pressure sensing array to complete signal amplification, filtering and A/D conversion, and convert the analog pressure signal into a digital signal. Supporting wired shielded cables or wireless bluetooth/ZigBee transmissions. (4) Data processing unit Built-in processor and memory module, carry out: -pressure threshold comparison, judging filling/underfilling/void; -generating a filling degree thermodynamic cloud map from the sensor positions; -locating defect area coordinates and ranges; -storing the whole process data, generating a detection report. (5) Display and early warning module The touch screen comprises an industrial touch screen, an audible and visual alarm and a wireless communication module. -The screen displays the filling cloud picture, the pressure data and the early warning information in real time; -automatic audible and visual alarm in case of large area underfilling or voids; -uploading data remotely