Thick buried layer concrete transmission type wireless stress strain sensor

Abstract

The invention relates to the technical field of sensors, and particularly discloses a thick buried layer concrete transmission type wireless stress strain sensor. The sensor comprises a detection module, a signal amplification module, a micro-processing module and a wireless transceiving module; the detection module is used for sending a collected electric signal to the signal amplification module, the signal amplification module is used for carrying out amplification and analog-to-digital conversion on the electric signal to generate a digital signal and sending the digital signal to the micro-processing module, and the micro-processing module is used for controlling the wireless transceiver module to send the digital signal to the outside; the micro-processing module is used for entering a dormant state after initialization, the wireless transceiver module is used for receiving external information and judging whether the external information contains a wakeup instruction, and if the external information contains the wakeup instruction, the micro-processing module is waken up. By the adoption of the technical scheme, the construction and maintenance cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a penetrating wireless stress-strain sensor for thick buried concrete. Background technique [0002] The stress-strain analysis of concrete is a complicated problem both in theory and in practice. First, the complexity of the concrete material itself: concrete is a multi-phase material with micro-cracks and pores, and is not an ideal linear elastic material. Mechanical parameters such as elastic modulus change with time, and there are creep, relaxation, thermal expansion and contraction , Wet expansion and drying shrinkage, etc., the unevenness that may be caused by the separation of aggregates, etc.; second, the complexity of the basic structure of the specific installation and laying of the concrete building structure: there are various vertical and horizontal structural joints, construction joints, and keyways in the entire building structure. Local structures such as holes, ...

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Problems solved by technology

[0004] However, the above solution requires a large area for laying optical fibers, and the construction cost is relatively high. Moreover, external equipment is required to be connected to the stress sensing optical fiber, which also increases the maintenance cost in the later stage.

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