Method for measuring mid-span deflection on the basis of bridge mid-span strain
A technology of strain measurement and mid-span deflection, applied in the direction of electric/magnetic solid deformation measurement, measuring device, electromagnetic measuring device, etc., can solve the problems of complex installation and calculation, difficult guarantee of sensor reliability and measurement accuracy, and high cost, and achieve The calculation method is simple, convenient for real-time online monitoring, and the effect of high reliability
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[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0033] Such as figure 1 As shown, the embodiment of the present invention includes a strain sensor and a strain interrogator, the strain sensor adopts a fiber grating strain sensor, and the strain interrogator adopts an optical fiber grating interrogator;
[0034] The fiber grating strain sensor is installed at the bottom of the bridge span, and is used to measure the strain of the bridge longitudinal direction (vehicle running direction);
[0035] The fiber grating demodulator is connected to the fiber grating strain sensor through an optical fiber, and the fiber grating demodulator is installed at a certain position on the pier or on the ground.
[0036] In practical applications, the strain in the b...
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