Device for measuring deflection/ displacement line shape by pressure difference and method thereof

Abstract

The invention provides a device for measuring deflection / displacement line shape by pressure difference and a method thereof. The device comprises a trolley and an L-shaped pipeline filled with liquid, wherein the horizontal section of the L-shaped pipeline is arranged on the trolley along the length direction of the trolley; the two ends of the horizontal section of the L-shaped pipeline are respectively provided with pressure sensors A and B, and the bottom is provided with a temperature sensor; a wheel of the trolley is provided with a displacement transducer; the temperature sensor, the pressure sensors A and B and the displacement transducer are connected with a control system provided with an interface and a memorizer by a data bus; and the displacement transducer is used for controlling the measurement to start for once after the trolley rotates for N rounds. The two pressure sensors are used for measuring the pressure difference at the two ends of the pipeline, and calculating by the liquid density at the different temperatures, thus measuring the vertical altitude difference between two points. The invention has the advantages of wide measuring plane, high accuracy, no influence by light interference, high degree of automation, low measuring cost, etc.

Description

technical field [0001] The invention relates to a device and method for measuring bridge deflection and ground vertical settlement, especially a device and method for automatically measuring bridge continuous deflection and alignment by using an L-shaped connecting pipe, a pressure sensor, a temperature sensor and a displacement sensor. Background technique [0002] Measuring bridge deflection and ground subsidence plays an important role in modern road and bridge health detection, and the alignment of bridges and ground can more intuitively show their displacement conditions. In the prior art, most of the devices and methods used to detect and monitor bridge deflection / displacement cannot measure the continuous deflection / displacement and settlement of bridges and road surfaces, but can only measure the relative height changes of a small number of observation points, and the measurement data cannot smoothly reproduce the actual Deflection and settlement of bridge deck and p...

AI Technical Summary

Problems solved by technology

In the prior art, most of the devices and methods used to detect and monitor bridge deflection / displacement cannot measure the continuous deflection / displacement and settlement of bridges and road surfaces, but can only measure the relative height changes of a small number of observation points, and the measurement data cannot smoothly reproduce the actual Deflection and settlement of bridge deck and pavement

For example, when using traditional level gauges, percentage gauges, micrometers, and deflection gauges to measure bridge deflection, firstly, the degree of automation is not high, relying on manual operation, the measurement accuracy is limited by the operator’s experience, and secondly, the measurement time for large bridges will be slow It is very long, and the deformation of the bridge during the measurement process cannot be ignored, resulting in inaccurate measurement data

Even if the accuracy of the measured data meets the requirements, the actual deformation of the bridge cannot be smoothly fitted due to the small number of measured points

For example, when using an intelligent total station to measure bridge displacement, firstly, the cost is high, and secondly, the more points to be measured, the greater the time cost for the total station to automatically align the reflective prism. Conducive to the measurement of bridge continuous deflection and the fitting of bridge alignment

For example, the 200720188607.2 "device for measuring continuous vertical deflection / displacement" disclosed in the Chinese patent, an inclination sensor is fixed on the trolley to measure the bridge's continuous deflection. The vertical displacement is measured, and the measurement accuracy is limited

[0003] As mentioned above, the existing bridge deflection and ground subsidence measurement devices are either not highly automated, or have a limited scope of use, or are not accurate enough, or have high costs, or are greatly affected by ambient temperature, or cannot reproduce the smoothness of bridges and roads. For vertical displacement, some need to be converted by inclination angle, which restricts the promotion and application of existing methods in measuring bridge deflection, ground settlement, etc.

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