Bridge box dynamic displacement monitoring device

Abstract

The utility model relates to a dynamic displacement monitoring device for a bridge box, which belongs to the technical field of rail transit devices and comprises a first casing, a second casing, a laser transmitter, an induction target plate, a conversion circuit board, a communication module and a storage battery, and the end faces, close to each other, of the first casing and the second casing are respectively provided with a first mounting groove and a second mounting groove; the laser transmitter is fixed in the first mounting groove; the induction target plate is fixed in the second mounting groove; and the conversion circuit board and the communication module are both fixed in the second mounting groove and are both electrically connected with the induction target plate. According to the utility model, the first casing and the second casing are fixed on the two adjacent bridge boxes, the laser transmitter is fixed in the first mounting groove, and the induction target plate is fixed in the second mounting groove; the position of the laser ray emitted by the laser emitter on the induction target plate can be correspondingly changed, so that the displacement between the two adjacent bridge boxes can be conveniently and accurately measured.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transit devices, in particular to a bridge box dynamic displacement monitoring device. Background Art

[0002] Bridge boxes are expensive and have important social functions. They have always been important hubs in transportation projects, and their design service life is as long as several decades or even hundreds of years. However, with the coupling of disaster factors such as environmental erosion, material aging, and long-term effects of loads, fatigue effects, and mutation effects, it is inevitable that the bridge will accumulate damage and its resistance will decay, thereby reducing its ability to resist natural disasters and even normal operations, and in extreme cases, causing catastrophic emergencies. Therefore, an operational health monitoring system is set up on adjacent bridge boxes to monitor the degree of changes in the working state of the bridge structure in real time, grasp the accumulation of structural damage and the decline in safety, which is of great practical significance for the scientific decision-making of monitoring, maintenance and control of major engineering structures such as large bridges, and to ensure the safe operation of the structure.

[0003] At present, two main sensors are used to monitor the displacement between adjacent bridge boxes in real time. One is the inclination sensor, which is based on the MEMS capacitive acceleration sensor chip. It measures the angle data by monitoring the vibration of the bridge, and calculates the relative displacement according to the Pythagorean theorem based on the angle value. However, the inclination sensor itself has measurement errors and calculation methods, which ultimately lead to a large deviation between the calculation result and the actual situation. In addition, the inclination sensor can only measure the displacement in three directions: up, down, front or up, down, back, which cannot meet the requirements of bridge displacement monitoring. The second is the electronic displacement meter. The core of the electronic displacement meter is the iron core movable transformer, which is composed of an iron core, an armature, a primary coil, and a secondary coil. The primary coil and the secondary coil are distributed on the coil frame. There is a freely movable rod-shaped armature inside the coil. When the armature is in the middle position, the induced electromotive force generated by the two secondary coils is equal, so the output voltage is 0; when the armature moves inside the coil and deviates from the center position, the induced electromotive force generated by the two coils is unequal, and there is a voltage output, and the voltage depends on the size of the displacement. However, the electronic displacement meter can only measure the displacement of the beam box in one direction and cannot meet the requirements of bridge displacement monitoring.

[0004] Therefore, how to design a monitoring device that can monitor the dynamic displacement of bridge boxes in all directions is an urgent problem that technical personnel in this field need to solve. Utility Model Content

[0005] The utility model provides a bridge box dynamic displacement monitoring device, which overcomes the technical problems of large monitoring errors and limited monitoring dimensions of existing inclination sensors or electronic displacement meters.

[0006] The utility model solves the above technical problems with the following technical solutions: a bridge box dynamic displacement monitoring device, a bridge having a plurality of bridge boxes arranged adjacent to each other in sequence; comprising: a first housing, a second housing, a laser transmitter, an induction target plate, a conversion circuit board, a communication module and a battery,

[0007] The first housing and the second housing are respectively fixed on two adjacent bridge boxes and their end faces close to each other are respectively provided with a first mounting groove and a second mounting groove; the laser emitter is fixed in the first mounting groove; the induction target plate is arranged opposite to the laser emitter and fixed in the second mounting groove; the conversion circuit board is fixed in the second mounting groove and electrically connected to the induction target plate; the communication module is fixed in the second mounting groove and electrically connected to the conversion circuit board; the battery is fixed in the first mounting groove or the second mounting groove and electrically connected to the laser emitter and the communication module.

[0008] The beneficial effect of the utility model is that the first housing and the second housing are respectively fixed on two adjacent bridge boxes. Since the laser emitter is fixed in the first mounting groove and the sensing target plate is fixed in the second mounting groove, when the two adjacent bridge boxes are relatively displaced in the X-axis direction, the Y-axis direction or the Z-axis direction, the position of the laser beam emitted by the laser emitter on the sensing target plate can be changed accordingly, so as to conveniently and accurately measure the displacement between the two adjacent bridge boxes, and provide data support for the safe use of the high bridge.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, it also includes a hose, one open end of which is fixedly connected to the notch of the first installation groove and the other open end of which is fixedly connected to the notch of the second installation groove.

[0011] A further beneficial effect of the above method is that the two ends of the hose are fixedly connected to the notch of the first mounting groove and the notch of the second mounting groove, respectively, so as to avoid external light interfering with the test results and improve the test accuracy.

[0012] Furthermore, the hose is made of plastic material.

[0013] Furthermore, it also includes a plurality of solar photovoltaic panels, which are respectively fixed on the outer side walls of the first casing and the second casing and are electrically connected to the battery.

[0014] A further beneficial effect of the above is that by fixing the solar photovoltaic panels on the outer walls of the first housing and the second housing, the batteries can be continuously provided with electrical energy, the battery life of the monitoring device can be extended, and the practicality of the monitoring device can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model discloses a bridge box dynamic displacement monitoring device.

[0016] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0017] 1. first housing, 11. first mounting slot, 2. second housing, 3. laser transmitter, 4. induction target plate, 5. hose. DETAILED DESCRIPTION

[0018] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0019] like Figure 1 As shown, a bridge box dynamic displacement monitoring device is provided, wherein the bridge has a plurality of bridge boxes arranged adjacent to each other in sequence; the device comprises: a first housing 1, a second housing 2, a laser transmitter 3, an induction target plate 4, a conversion circuit board, a communication module and a battery,

[0020] The first housing 1 and the second housing 2 are respectively fixed on two adjacent bridge boxes and their end faces close to each other are respectively provided with a first mounting groove 11 and a second mounting groove; the laser emitter 3 is fixed in the first mounting groove 11; the induction target plate 4 is arranged opposite to the laser emitter 3 and fixed in the second mounting groove; the conversion circuit board is fixed in the second mounting groove and is electrically connected to the induction target plate 4; the communication module is fixed in the second mounting groove and is electrically connected to the conversion circuit board; the battery is fixed in the first mounting groove 11 or the second mounting groove and is electrically connected to the laser emitter 3 and the communication module.

[0021] In some specific embodiments, a hose 5 may be further included, one open end of the hose 5 is fixedly connected to the notch of the first installation groove 11 and the other open end of the hose 5 is fixedly connected to the notch of the second installation groove.

[0022] Specifically, the hose 5 can be made of plastic material.

[0023] In some specific embodiments, a plurality of solar photovoltaic panels may be included. The plurality of solar photovoltaic panels are respectively fixed on the outer side walls of the first housing 1 and the second housing 2 and are electrically connected to the battery.

[0024] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bridge box dynamic displacement monitoring device, wherein the bridge has a plurality of bridge boxes arranged adjacent to each other in sequence; characterized in that: include: A first housing (1) and a second housing (2), wherein the first housing (1) and the second housing (2) are respectively fixed on two adjacent bridge boxes and their end surfaces close to each other are respectively provided with a first mounting groove (11) and a second mounting groove; A laser emitter (3), the laser emitter (3) being fixed in the first mounting groove (11); an induction target plate (4), the induction target plate (4) being arranged opposite to the laser emitter (3) and fixed in the second mounting groove; A conversion circuit board, the conversion circuit board is fixed in the second mounting groove and is electrically connected to the induction target board (4); A communication module, the communication module is fixed in the second mounting slot and is electrically connected to the conversion circuit board; A storage battery, wherein the storage battery is fixed in the first mounting groove (11) or the second mounting groove and is electrically connected to the laser emitter (3) and the communication module.

2. A bridge box dynamic displacement monitoring device according to claim 1, characterized in that: It also comprises a hose (5), one open end of which is fixedly connected to the notch of the first installation slot (11) and the other open end of which is fixedly connected to the notch of the second installation slot.

3. The bridge box dynamic displacement monitoring device according to claim 2 is characterized in that: The hose (5) is made of plastic material.

4. The bridge box dynamic displacement monitoring device according to claim 1 is characterized in that: It also comprises a plurality of solar photovoltaic power generation panels, wherein the plurality of solar photovoltaic power generation panels are respectively fixed on the outer side walls of the first casing (1) and the second casing (2) and are electrically connected to the storage battery.

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