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Concrete setting time detection system based on patch antenna

A technology of coagulation time and patch antenna, which is applied in the direction of indirect flow characteristic measurement, measurement device, and measurement of electrical variables, etc., to achieve the effect of increasing applicability, simple sensing system, and flexible layout

Active Publication Date: 2021-04-09
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] This application aims at the shortcomings of the existing technology, in order to solve the problem of traditional sensors providing energy and transmitting information by wire, this application discloses a concrete setting time detection sensor based on a patch antenna, which simplifies the measurement method of concrete setting time and reduces concrete setting Time monitoring cost, realizing passive wireless monitoring of concrete structure setting time

Method used

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  • Concrete setting time detection system based on patch antenna
  • Concrete setting time detection system based on patch antenna
  • Concrete setting time detection system based on patch antenna

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Embodiment 1

[0040] 1. Structural Design

[0041] This application discloses a design of a concrete setting time detection sensor based on a patch antenna, which is one of the core patents that need to be protected, such as figure 1 As shown, it consists of two components, where:

[0042] Component 1 includes a lower waterproof membrane 1, a ground plane 2, a substrate 3, a radiation patch 4, and a chip 5, which are in a positional relationship from bottom to top: the radiation patch 4 and the chip 5 are placed on the substrate 3 and electrically connected to each other. , and then installed together on the ground plane 2; patch 4 and chip 5, the height of the two is equal;

[0043] Component two includes an upper waterproof membrane 6, a waterproof upper cover 7, and a waterproof side cover 8; the waterproof upper cover 7 and the waterproof side cover 8 form an outer cover structure for accommodating and protecting the sensor of component one; the upper waterproof membrane 6 is glued A ...

Embodiment 2

[0057] Embodiment 2 (application system and monitoring)

[0058] The following further discloses the system patent of the present application, which is the second core patent to be protected.

[0059] Based on embodiment 1, the monitoring system and its use are further provided.

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Abstract

The invention provides a concrete setting time detection system based on a patch antenna. The system is characterized by comprising an RFID tag sensor, a reader and an output module which are constructed into an RFID system; a controller periodically adjusts system transmitting frequency so as to track and maintains communication with a sensor pre-buried in to-be-detected concrete; a digital processing module determines the current working resonant frequency of the sensor according to the current effective communication frequency maintained by the system, calculates and deduces the moisture content or dielectric constant of the current concrete, and calculates the dielectric constant change trend of the overlying concrete according to the detected resonant frequency drift condition of an RFID tag, so as to deduce the water content change trend of the overlying concrete and deduce the setting time of the concrete according to the water content change trend; and an output module displays a trend curve, current monitoring parameters and a deduced concrete setting remaining time point obtained by the digital processing module.

Description

technical field [0001] This application relates to concrete structure construction and its quality monitoring technology. Background technique [0002] Concrete structures need to ensure that the quality of the concrete is qualified during the construction process. It is necessary to ensure that the hydration of the concrete at each stage meets the standards. By testing the setting time of the concrete, it is convenient to judge the hydration state of the concrete at the moment, thereby qualitatively judging the construction quality of the concrete structure. . Therefore, it is necessary to detect the setting time of concrete during concrete construction. [0003] The traditional setting time of concrete is judged by the degree of concrete penetration. Although this test scheme is easy to operate and the test is more accurate, it requires relatively high manpower quality and requires long-term manual measurement. Therefore, scholars have studied the detection methods of co...

Claims

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Application Information

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IPC IPC(8): G01N22/04G01R27/26G01N11/00
CPCG01N22/04G01R27/2617G01R27/2623G01N11/00G01N2011/006
Inventor 谢丽宇易卓然薛松涛
Owner TONGJI UNIV