Bridge deflection and beam end angle measurement system and method based on symmetrical imaging displacement sensor

Abstract

The present invention discloses a bridge deflection and beam end angle measurement system and method based on symmetrical imaging displacement sensors. The measurement system includes a first symmetrical optical imaging displacement sensor, a second symmetrical optical imaging displacement sensor, and a third optical imaging displacement sensor, which are sequentially arranged at measuring stations A, C, and B. The first optical imaging displacement sensor includes a right optical imaging system and a right light source. The second optical imaging displacement sensor is a symmetrical imaging displacement sensor, including a left optical imaging system, a right optical imaging system, a left light source, and a right light source. The third optical imaging displacement sensor includes a left optical imaging system and a left light source. Measuring stations A and C correspond to each other, and measuring stations C and B correspond to each other, and bidirectional light source imaging is performed on each of them to achieve deflection and angle measurement of measuring station C, as well as angle measurement of measuring stations A and B at the beam ends.

Description

Technical Field

[0001] The present invention belongs to the field of bridge engineering detection and monitoring, and relates to a bridge deflection and beam end angle measurement system and method based on a symmetrical imaging displacement sensor. Background Art

[0002] Bridges occupy a crucial position in highway transportation infrastructure and are numerous. Bridge deflection is a key bridge indicator. Bridge deflection measurement is crucial for completion acceptance, load testing, specific testing, and operational management. Small and medium-span simply supported beams, or girder bridges, are widely used. To ensure the safe operation of these small and medium-span bridges, it is necessary not only to measure their deflection but also their end angles.

[0003] Bridges are equally important in rail transportation, especially on high-speed rail lines, where they account for a significant portion of the total length. With the increasing density of rail transportation, train traction weight, and speeds, especially on high-speed rail exceeding 300 km / h, strict control of bridge deflection and beam end vertical rotation angles is essential for railway operation and maintenance management to ensure safe train traffic and bridge operation, as well as passenger comfort. High-precision measurement of these measurements is essential.

[0004] Currently, there are a variety of methods, technologies, sensors, and instruments for measuring bridge static and dynamic deflections and beam end rotation angles. However, in actual applications, these methods still have the following deficiencies, which cannot meet the needs of highway and railway bridge engineering applications and cannot achieve real-time dynamic measurement of bridge static and dynamic deflections and beam end rotation angles:

[0005] (1) Using instruments such as levels, theodolites, and total stations to detect bridge deflection can only detect the static deflection and static beam end rotation angle of the bridge. Such instruments are rarely used to measure the beam end rotation angle of the bridge;

[0006] (2) Using various displacement meters such as laser displacement sensors and electronic mechanical displacement meters to detect bridge deflection requires assuming a specific bracket under the bridge, which makes the on-site measurement of bridge deflection cumbersome and especially cannot be used for deflection detection of rivers, lakes, and high pier bridges. This type of sensor is used for beam end angle measurement, but the accuracy is not high and it is rarely used for bridge beam end angle measurement.

[0007] (3) A measurement system based on a single collimated laser or optical imaging photoelectric sensor is used to detect bridge deflection. Since this type of sensor needs to be installed in a stable position on the bridge or on a stable platform at other locations, it brings great inconvenience to the bridge deflection measurement and cannot be used for bridge beam end angle measurement;

[0008] (4) The measurement system based on inertial sensors such as accelerometers, inclinometers, gyroscopes, etc. is used to measure bridge deflection and bridge beam end angle, which has low measurement accuracy;

[0009] (5) The GPS positioning system is used to detect bridge deflection, but the deflection accuracy is low and cannot be directly used for bridge beam end angle measurement;

[0010] (6) Laser interferometers, microwave interferometers, etc. are used to detect bridge deflection. However, their use on site is limited by geographical location and they need to be installed on the banks of rivers. Such instruments cannot be used to measure the angle of bridge beam ends.

[0011] (7) The use of liquid-connected tube sensors for bridge deflection detection can only be used to detect the static deflection or quasi-static deflection of the bridge, and cannot be used to measure the angle of the bridge beam end.

[0012] The invention patent with publication number CN102967263A discloses an integrated bridge deflection-angle measurement method, and proposes a method for measuring the single-point deflection in the middle of a bridge pier and the angle of the deflection measurement point, but the patent cannot measure the angle of the bridge beam end. Summary of the Invention

[0013] The purpose of the embodiments of the present invention is to provide a bridge deflection and beam end angle measurement system and method based on a symmetrical imaging displacement sensor, so as to solve the problems of existing small and medium span bridge deflection measurement devices such as low measurement accuracy, single function, limited use conditions, high requirements for installation position and inability to measure bridge beam end angles.

[0014] The technical solution adopted in the embodiment of the present invention is: a bridge deflection and beam end angle measurement system based on a symmetrical imaging displacement sensor, comprising:

[0015] A first optical imaging displacement sensor, the first optical imaging displacement sensor is arranged at a measuring station A;

[0016] A second optical imaging displacement sensor, the second optical imaging displacement sensor is arranged at the measuring station C;

[0017] A third optical imaging displacement sensor, which is arranged at the measuring station B;

[0018] Station A, Station C, and Station B are set from left to right.

[0019] The first optical imaging displacement sensor includes a right optical imaging system and a right light source;

[0020] The second optical imaging displacement sensor is a symmetrical imaging displacement sensor, which includes a left optical imaging system, a right optical imaging system, a left light source, and a right light source;

[0021] The third optical imaging displacement sensor includes a left optical imaging system and a left light source.

[0022] Furthermore, the right optical imaging system of the first optical imaging displacement sensor corresponds to the left light source of the second optical imaging displacement sensor, and the right optical imaging system of the first optical imaging displacement sensor images the left light source of the second optical imaging displacement sensor;

[0023] The left optical imaging system of the second optical imaging displacement sensor corresponds to the right light source of the first optical imaging displacement sensor, and the left optical imaging system of the second optical imaging displacement sensor images the right light source of the first optical imaging displacement sensor;

[0024] The right optical imaging system of the second optical imaging displacement sensor corresponds to the left light source of the third optical imaging displacement sensor, and the right optical imaging system of the second optical imaging displacement sensor images the left light source of the third optical imaging displacement sensor;

[0025] The left optical imaging system of the third optical imaging displacement sensor corresponds to the right light source of the second optical imaging displacement sensor, and the left optical imaging system of the third optical imaging displacement sensor images the right light source of the second optical imaging displacement sensor.

[0026] Furthermore, the measuring station A, measuring station C and measuring station B are all set on the bridge deck;

[0027] Or the measuring station A and the measuring station B are respectively arranged on the bridge deck at the piers at both ends of the bridge, and the measuring station C is arranged on the bridge deck at the longitudinal middle point of the bridge or near the longitudinal middle point of the bridge.

[0028] Furthermore, the symmetrical imaging displacement sensor further includes a first mounting base, and the left optical imaging system, the right optical imaging system, the left light source, and the right light source of the symmetrical imaging displacement sensor are all mounted on the first mounting base;

[0029] The first mounting base includes a multifunctional base, and the multifunctional base includes:

[0030] An upper connecting plate, on which the left optical imaging system, the right optical imaging system, the left light source, and the right light source of the symmetrical imaging displacement sensor are all mounted;

[0031] A horizontal rotating structure is rotatably connected by a rotating part and a fixed part, and the rotating part of the horizontal rotating structure is fixedly connected to the bottom of the upper connecting plate;

[0032] A height adjustment structure, wherein the top of the height adjustment structure is fixedly connected to the fixed portion of the horizontal rotation structure;

[0033] a lower connecting plate connected to the bottom of the height adjustment structure and mounted on the tripod;

[0034] The upper connecting plate is equipped with a height sensor, an inclination sensor and a distance sensor;

[0035] A data acquisition processor is installed on the lower connecting plate, and the output ends of the left optical imaging system, right optical imaging system, height sensor, inclination sensor and distance sensor of the symmetrical imaging displacement sensor are electrically connected to different input ends of its data acquisition processor.

[0036] Furthermore, the first optical imaging displacement sensor further includes a second mounting base, and the right optical imaging system and the right light source of the first optical imaging displacement sensor are both mounted on the second mounting base;

[0037] The third optical imaging displacement sensor further includes a third mounting base, and the left optical imaging system and the left light source of the third optical imaging displacement sensor are both mounted on the third mounting base;

[0038] The second mounting seat and the third mounting seat are consistent with the first mounting seat of the symmetrical imaging displacement sensor in structure. Then:

[0039] The output ends of the right optical imaging system, the height measuring sensor, the tilt sensor and the distance measuring sensor of the first optical imaging displacement sensor are all electrically connected to different input ends of its data acquisition processor;

[0040] The output ends of the left optical imaging system, the height measuring sensor, the tilt sensor and the distance measuring sensor of the third optical imaging displacement sensor are all electrically connected to different input ends of its data acquisition processor.

[0041] Furthermore, the right optical imaging system and / or right light source of the first optical imaging displacement sensor and the left optical imaging system and / or left light source of the second optical imaging displacement sensor are mounted on the multifunctional base via a pitch angle adjustment device;

[0042] The right optical imaging system and / or right light source of the second optical imaging displacement sensor and the left light source and / or left optical imaging system of the third optical imaging displacement sensor are mounted on the multifunctional base via a pitch angle adjustment device;

[0043] The first optical imaging displacement sensor, the second optical imaging displacement sensor and the third optical imaging displacement sensor are installed on the left optical imaging system, the right optical imaging system, the left light source and the right light source on the multifunctional base through the pitch angle adjustment device, and corresponding inclination sensors are respectively provided.

[0044] Furthermore, the first optical imaging displacement sensor, the second optical imaging displacement sensor and the third optical imaging displacement sensor are all symmetrical imaging displacement sensors;

[0045] The measuring station A is set on the bridge deck at the left pier of the bridge, the measuring station B is set on the bridge deck at the right pier of the bridge, and the measuring station C is set on the bridge deck at the longitudinal middle point of the bridge or near the longitudinal middle point of the bridge;

[0046] The bridge deflection and beam end angle measurement system based on the symmetrical imaging displacement sensor further includes:

[0047] The left pier settlement sensor is set at the measuring station S. L0 , measuring station S L0 Located outside the left pier of the bridge, measuring the settlement of the left pier of the bridge;

[0048] The right pier settlement sensor is set at the measuring station S. R0 , measuring station S R0 Located on the outside of the right pier of the bridge, measuring the settlement of the right pier of the bridge.

[0049] Furthermore, the left pier settlement sensor includes a right optical imaging system;

[0050] The right pier settlement sensor includes a left optical imaging system;

[0051] The left light source of the first optical imaging displacement sensor corresponds to the right optical imaging system of the left pier settlement sensor. The right optical imaging system of the left pier settlement sensor images the left light source of the first optical imaging displacement sensor to measure the settlement of the left pier of the bridge.

[0052] The right light source of the third optical imaging displacement sensor corresponds to the left optical imaging system of the right pier settlement sensor. The left optical imaging system of the right pier settlement sensor images the right light source of the third optical imaging displacement sensor to measure the settlement of the right pier of the bridge.

[0053] The technical solution adopted in the embodiment of the present invention is: a method for measuring bridge deflection and beam end angle based on a symmetrical imaging displacement sensor, comprising the following steps:

[0054] Step S1: deploying a bridge deflection and beam end angle measurement system based on a symmetrical imaging displacement sensor on the bridge;

[0055] Step S2: Calculate the bridge deflection and beam end rotation angle using the measurement data of each measuring station of the bridge deflection and beam end rotation angle measurement system based on the symmetrical imaging displacement sensor. The specific process is as follows:

[0056] A0 is the initial position of measuring station A; A1 is the intersection of the principal ray of the left optical imaging system of measuring station C and the vertical plane of measuring station A perpendicular to the paper surface; A3 is the intersection of the principal ray of the right optical imaging system of measuring station A and the vertical plane of measuring station C perpendicular to the paper surface; B0 is the initial position of measuring station B; B1 is the intersection of the principal ray of the right optical imaging system of measuring station C and the vertical plane of measuring station B perpendicular to the paper surface; B3 is the intersection of the principal ray of the left optical imaging system of measuring station B and the vertical plane of measuring station C perpendicular to the paper surface; C0 is the measuring station when there is no deflection of the bridge. The initial position of the symmetrical intermediate station C between station A and station B; C1 is the changed position of the symmetrical intermediate station C between station A and station B when the bridge has deflection; C2 is the initial position of the asymmetric station C between station A and station B when the bridge has no deflection; C3 is the changed position of the asymmetric intermediate station C between station A and station B when the bridge has deflection; L1 is the horizontal distance between station A and station C, L2 is the horizontal distance between station B and station C, and L is the horizontal distance between station A and station B; θ A is the bridge rotation angle at station A, θ B is the bridge rotation angle at station B, θ C is the bridge angle at measuring station C;

[0057] When the measuring station C is an asymmetric middle measuring station between measuring stations A and B, when measuring the deflection of measuring station C, the calculation formula for the deflection value C2C3 of measuring station C is:

[0058] C2C3=(A0A1*L1+B0B1*L2) / L;

[0059] Wherein, A0A1 is the measurement value of the right optical imaging system of the first optical imaging displacement sensor of the measuring station A, and B0B1 is the measurement value of the left optical imaging system of the third optical imaging displacement sensor of the measuring station B;

[0060] The rotation angle θ of the C measuring station C The calculation formula is:

[0061] θ C =tg -1 ((B0B1-A0A1) / L);

[0062] Rotation angle θ of measuring station A A The calculation formula is:

[0063] θ A =tg -1 (C2A3 / L1);

[0064] Wherein, C2A3 is the measurement value of the left optical imaging system of the second optical imaging displacement sensor at measuring station C;

[0065] Rotation angle θ of measuring station B B The calculation formula is:

[0066] θ B =tg -1 (C2B3 / L2);

[0067] Among them, C2B3 is the measurement value of the right optical imaging system of the second optical imaging displacement sensor at measuring station C.

[0068] Furthermore, when the measuring station C is the symmetrical middle measuring station between measuring stations A and B, point C2 coincides with point C0, point C3 coincides with point C1, L1=L2, L=L1+L2; if the bridge deforms symmetrically, then θ C =0,θ A＝ θ B ;

[0069] S L The measuring station S L0 Horizontal distance from station A, S R The measuring station S R0 The horizontal distance from the measuring station B, at the measuring station S L0 The left pier settlement sensor is used to measure the relative position of station A to station S. L0 The amount of sedimentation Δ A , at the measuring station S R0 The right pier settlement sensor is used to measure the settlement of station B relative to station S. R The amount of sedimentation Δ B At the same time, the deflection and inclination measurement of the bridge measuring station C compared with the measuring stations A and B, the rotation angle measurement of the measuring stations A and B, that is, the ends of the bridge beam, and the settlement measurement of the left and right piers of the bridge are realized.

[0070] The beneficial effects of the embodiments of the present invention are:

[0071] 1. The bridge deflection and beam end rotation measurement system based on symmetrical imaging displacement sensors can not only measure the two-dimensional static and dynamic deflections and rotations of a single point in the middle of small and medium-span bridges, but can also simultaneously measure the beam end rotations at the bridge piers and the settlement of the piers. Therefore, it is suitable for measuring the deflection and beam end rotations of small and medium-span bridges, meeting the needs of bridge deflection and beam end rotation detection and monitoring, and solving the problem of existing small and medium-span bridge deflection measurement devices having a single function and being unable to measure beam end rotations.

[0072] 2. In the bridge deflection and beam end angle measurement system based on symmetrical imaging displacement sensors, high-precision symmetrical imaging displacement sensors formed by high-resolution, high-sampling-rate optoelectronic chips can be used to meet the needs of high-precision dynamic measurement of bridge deflections and beam end angles, solving the problem of low measurement accuracy of existing deflection measurement devices for small and medium-span bridges.

[0073] 3. When measuring the static and dynamic deflections and beam end rotation angles of small and medium-span bridges, it is only necessary to install and deploy the bridge deflection and beam end rotation measurement system based on the symmetrical imaging displacement sensor on the bridge deck and at the measurement points on the piers. There is no need to install it on a stable platform outside the bridge. This is very conducive to on-site deflection and beam end rotation angle measurements of small and medium-span bridges. It is simple to use and has low requirements for the installation location, solving the problem of limited use conditions and high requirements for the installation location of existing small and medium-span bridge deflection measurement devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0075] Figure 1 It is a schematic diagram of the top view structure of a symmetrical imaging displacement sensor.

[0076] Figure 2 It is a schematic diagram of the front view structure of a symmetrical imaging displacement sensor.

[0077] Figure 3 This is a front view structural diagram of the functional base.

[0078] Figure 4 This is a schematic diagram of the overhead structure of the bridge deflection and beam end angle measurement system based on symmetrical imaging displacement sensors.

[0079] Figure 5 This is the first measurement principle diagram of the bridge deflection and beam end angle measurement system based on symmetrical imaging displacement sensor.

[0080] Figure 6 This is the second measurement principle diagram of the bridge deflection and beam end angle measurement system based on symmetrical imaging displacement sensors.

[0081] Figure 7 This is the third measurement principle diagram of the bridge deflection and beam end angle measurement system based on symmetrical imaging displacement sensors.

[0082] Figure 8 This is the fourth measurement principle diagram of the bridge deflection and beam end angle measurement system based on symmetrical imaging displacement sensors.

[0083] In the figure, 1. Symmetrical optical imaging system, 1-1. Left optical imaging system, 1-2. Right optical imaging system, 2. Symmetrical luminous light source, 2-1. Left luminous light source, 2-2. Right luminous light source, 3. Multi-functional base, 3-01. Altimeter sensor, 3-02. Inclination sensor, 3-03. Distance sensor, 3-04. Horizontal rotation structure, 3-05. Height adjustment structure, 3-06. Data acquisition processor, 3-07. Upper connecting plate, 3-08. Lower connecting plate, 4. Tripod, 5. Bridge deck, 6. Optical imaging direction, 7. First optical imaging displacement sensor, 8. Second optical imaging displacement sensor, 9. Third optical imaging displacement sensor. DETAILED DESCRIPTION

[0084] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0085] Example 1

[0086] This embodiment provides a symmetrical imaging displacement sensor, such as Figures 1-2 As shown, including:

[0087] a left optical imaging system 1-1, the left optical imaging system 1-1 images an object on the left along its optical imaging direction 6;

[0088] a right optical imaging system 1-2, the right optical imaging system 1-2 images an object on the right along its optical imaging direction 6;

[0089] A left-emitting light source 2-1, which emits a directional light beam to the left;

[0090] A right-emitting light source 2-2, which emits a directional light beam to the right.

[0091] In some embodiments, the left optical imaging system 1 - 1 and the right optical imaging system 1 - 2 form a symmetrical optical imaging system 1 ;

[0092] The left light source 2 - 1 and the right light source 2 - 2 form a symmetrical light source 2 .

[0093] In some embodiments, the left optical imaging system 1 - 1 and the right optical imaging system 1 - 2 adopt optical imaging systems.

[0094] In some embodiments, the symmetrical imaging displacement sensor further includes a first mounting base, and the left optical imaging system 1-1, the right optical imaging system 1-2, the left light source 2-1, and the right light source 2-2 of the symmetrical imaging displacement sensor are all mounted on the first mounting base.

[0095] In some embodiments, the first mounting base includes a multifunctional base 3 and a tripod 4, the multifunctional base 3 is mounted on the tripod 4, and the tripod 4 is mounted on the bridge deck 5. Figure 2 As shown, the left optical imaging system 1 - 1 , the right optical imaging system 1 - 2 , the left light source 2 - 1 , and the right light source 2 - 2 of the symmetrical imaging displacement sensor are all installed on a multifunctional base 3 .

[0096] In some embodiments, as Figure 3 As shown, the multifunctional base 3 includes:

[0097] The upper connecting plate 3-07, the left optical imaging system 1-1, the right optical imaging system 1-2, the left light source 2-1, and the right light source 2-2 of the symmetrical imaging displacement sensor are all installed on the upper connecting plate 3-07;

[0098] Horizontal rotating structure 3-04, the horizontal rotating structure 3-04 is rotatably connected by a rotating part and a fixed part. The rotating part of the horizontal rotating structure 3-04 is fixedly connected to the bottom of the upper connecting plate 3-07. The rotating part of the horizontal rotating structure 3-04 rotates to adjust the horizontal position of the left optical imaging system 1-1, the right optical imaging system 1-2, the left light source 2-1, and the right light source 2-2 on the upper connecting plate 3-07;

[0099] Height adjustment structure 3-05, the top of the height adjustment structure 3-05 is fixedly connected to the fixed part of the horizontal rotation structure 3-04, and the height of the left optical imaging system 1-1, the right optical imaging system 1-2, the left light source 2-1, and the right light source 2-2 on the upper connecting plate 3-07 are adjusted through the height adjustment structure 3-05;

[0100] A lower connecting plate 3-08, which is connected to the bottom of the height adjustment structure 3-05 and is mounted on the tripod 4;

[0101] in:

[0102] The upper connecting plate 3-07 is equipped with a height sensor 3-01, an inclination sensor 3-02 and a distance sensor 3-03; the height sensor 3-01 is used to measure the initial heights of the left optical imaging system 1-1, the right optical imaging system 1-2, the left light source 2-1, and the right light source 2-2 from the bridge deck, so as to eliminate the measurement error caused by the inconsistent installation heights of the symmetrical imaging displacement sensors of adjacent measuring stations when the initial line shape is formed during the bridge deflection measurement process; the inclination sensor 3-02 is used to measure the inclination of the multifunctional base 3 and the horizontal plane, and to correct the measurement error caused by the tilt of the left optical imaging system 1-1 and the right optical imaging system 1-2; the distance sensor 3-03 is used to measure the horizontal distance between the current measuring station and the adjacent measuring station;

[0103] A data acquisition processor 3-06 is installed on the lower connecting plate 3-08. The output ends of the left optical imaging system 1-1, the right optical imaging system 1-2, the altimeter sensor 3-01, the inclination sensor 3-02 and the distance sensor 3-03 of the symmetrical imaging displacement sensor are electrically connected to different input ends of its data acquisition processor 3-06. The data acquisition processor 3-06 calculates the displacement and rotation angle of the current measuring station relative to the adjacent measuring station based on the measurement data of the left optical imaging system 1-1, the right optical imaging system 1-2, the altimeter sensor 3-01, the inclination sensor 3-02 and the distance sensor 3-03 of the symmetrical imaging displacement sensor.

[0104] In some embodiments, the symmetrical optical imaging system 1 and the symmetrical luminous light source 2 are arranged horizontally, and the symmetrical optical imaging system 1 is set between the left luminous light source 2-1 and the right luminous light source 2-2 of the symmetrical luminous light source 2 to form a first optical imaging displacement sensor structure.

[0105] In some embodiments, the symmetrical optical imaging system 1 and the symmetrical luminous light source 2 are arranged horizontally, and the symmetrical luminous light source 2 is set between the left optical imaging system 1-1 and the right optical imaging system 1-2 of the symmetrical optical imaging system 1 to form a second optical imaging displacement sensor structure.

[0106] In some embodiments, the symmetrical optical imaging system 1 and the symmetrical luminous light source 2 are arranged vertically, and the left optical imaging system 1-1 is set on the top of the left luminous light source 2-1, and the right optical imaging system 1-2 is set on the top of the right luminous light source 2-2, forming a third optical imaging displacement sensor structure.

[0107] In some embodiments, the symmetrical optical imaging system 1 and the symmetrical luminous light source 2 are arranged vertically, and the left luminous light source 2-1 is set on the top of the left optical imaging system 1-1, and the right luminous light source 2-2 is set on the top of the right optical imaging system 1-2, forming a fourth optical imaging displacement sensor structure.

[0108] In some embodiments, the symmetrical optical imaging system 1 and the symmetrical luminous light source 2 are arranged horizontally, and the left luminous light source 2-1 is set in front of the left optical imaging system 1-1, and the right luminous light source 2-2 is set in front of the right optical imaging system 1-2, forming a fifth optical imaging displacement sensor structure.

[0109] In some embodiments, the symmetrical optical imaging system 1 and the symmetrical luminous light source 2 are arranged horizontally, and the left optical imaging system 1-1 is set in front of the left luminous light source 2-1, and the right optical imaging system 1-2 is set in front of the right luminous light source 2-2, forming a sixth optical imaging displacement sensor structure.

[0110] Based on the layout of the left optical imaging system 1-1, the right optical imaging system 1-2, the left light source 2-1 and the right light source 2-2 of the above-mentioned symmetrical imaging displacement sensor, the layout of the left optical imaging system 1-1, the right optical imaging system 1-2, the left light source 2-1 and the right light source 2-2 of various other symmetrical imaging displacement sensors can be transformed, which will not be repeated here, but are included in the structural design scope of the symmetrical imaging displacement sensor of this embodiment.

[0111] In some embodiments, the left optical imaging system 1-1 and / or the left light source 2-1 of the symmetrical imaging displacement sensor are installed on the multifunctional base 3 (upper connecting plate 3-07) with the left light source 2-1 and / or the right light source 2-2 via a pitch angle adjustment device, thereby achieving pitch angle adjustment of the left optical imaging system 1-1 and / or the left light source 2-1 and / or the right light source 2-2 of the symmetrical imaging displacement sensor. Furthermore, the left optical imaging system 1-1, the right optical imaging system 1-2, the left light source 2-1, and the right light source 2-2 of the symmetrical imaging displacement sensor are all installed with inclination sensors 3-02, which respectively measure the inclination of the left optical imaging system 1-1, the right optical imaging system 1-2, the left light source 2-1, and the right light source 2-2 of the symmetrical imaging displacement sensor, and correct the measurement errors caused by the inclination of the left optical imaging system 1-1, the right optical imaging system 1-2, the left light source 2-1, and the right light source 2-2.

[0112] In some embodiments, the left optical imaging system 1 - 1 and the right optical imaging system 1 - 2 use area array receiving chips to measure the two-dimensional displacement of the bridge structure, namely the vertical deflection and lateral displacement.

[0113] Example 2

[0114] This embodiment provides a bridge deflection and beam end angle measurement system based on symmetrical imaging displacement sensors, such as Figure 4 As shown, including:

[0115] A first optical imaging displacement sensor 7, which is arranged at a measuring station A;

[0116] A second optical imaging displacement sensor 8, which is arranged at the measuring station C;

[0117] A third optical imaging displacement sensor 9, which is arranged at the measuring station B;

[0118] Station A, station C, and station B are sequentially arranged on the bridge deck 5 from left to right;

[0119] The first optical imaging displacement sensor 7 includes a right optical imaging system 1-2 and a right light source 2-2;

[0120] The second optical imaging displacement sensor 8 adopts the symmetrical imaging displacement sensor described in Example 1;

[0121] The third optical imaging displacement sensor 9 includes a left optical imaging system 1-1 and a left light source 2-1;

[0122] The right optical imaging system 1-2 of the first optical imaging displacement sensor 7 corresponds to the left light source 2-1 of the second optical imaging displacement sensor 8, and the right optical imaging system 1-2 of the first optical imaging displacement sensor 7 images the left light source 2-1 of the second optical imaging displacement sensor 8;

[0123] The left optical imaging system 1-1 of the second optical imaging displacement sensor 8 corresponds to the right light source 2-2 of the first optical imaging displacement sensor 7, and the left optical imaging system 1-1 of the second optical imaging displacement sensor 8 images the right light source 2-2 of the first optical imaging displacement sensor 7;

[0124] The right optical imaging system 1-2 of the second optical imaging displacement sensor 8 corresponds to the left light source 2-1 of the third optical imaging displacement sensor 9, and the right optical imaging system 1-2 of the second optical imaging displacement sensor 8 images the left light source 2-1 of the third optical imaging displacement sensor 9;

[0125] The left optical imaging system 1-1 of the third optical imaging displacement sensor 9 corresponds to the right light source 2-2 of the second optical imaging displacement sensor 8, and the left optical imaging system 1-1 of the third optical imaging displacement sensor 9 images the right light source 2-2 of the second optical imaging displacement sensor 8.

[0126] In some embodiments, the first optical imaging displacement sensor 7 further includes a second mounting base, and the right optical imaging system 1-2 and the right light source 2-2 of the first optical imaging displacement sensor 7 are both mounted on the second mounting base;

[0127] The third optical imaging displacement sensor 9 further includes a third mounting base, on which the left optical imaging system 1-1 and the left light source 2-1 of the third optical imaging displacement sensor 9 are both mounted;

[0128] The second mounting base and the third mounting base have the same structure as the first mounting base of the symmetrical imaging displacement sensor in Example 1. Then:

[0129] The output ends of the right optical imaging system 1-2, the height sensor 3-01, the inclination sensor 3-02, and the distance sensor 3-03 of the first optical imaging displacement sensor 7 are electrically connected to different input ends of its data acquisition processor 3-06. The data acquisition processor 3-06 of the first optical imaging displacement sensor 7 calculates the displacement and rotation angle of the measuring station C relative to the measuring station A based on the measurement data of the right optical imaging system 1-2, the height sensor 3-01, the inclination sensor 3-02, and the distance sensor 3-03;

[0130] The output ends of the left optical imaging system 1-1, altimeter sensor 3-01, inclination sensor 3-02 and ranging sensor 3-03 of the third optical imaging displacement sensor 9 are electrically connected to different input ends of its data acquisition processor 3-06. The data acquisition processor 3-06 of the third optical imaging displacement sensor 9 calculates the displacement and rotation angle of the measuring station C relative to the measuring station B based on the measurement data of its left optical imaging system 1-1, altimeter sensor 3-01, inclination sensor 3-02 and ranging sensor 3-03.

[0131] In some embodiments, the right optical imaging system 1-2 and / or right light source 2-2 of the first optical imaging displacement sensor 7 and the left optical imaging system 1-1 and / or left light source 2-1 of the second optical imaging displacement sensor 8 are mounted on the multifunctional base 3 via a pitch angle adjustment device. This enables pitch angle adjustment of the right optical imaging system 1-2 and / or right light source 2-2 of the first optical imaging displacement sensor 7 and the left optical imaging system 1-1 and / or left light source 2-1 of the second optical imaging displacement sensor 8. At this time, the first optical imaging displacement sensor 7 and the second optical imaging displacement sensor 8 are installed on the left optical imaging system 1-1, the right optical imaging system 1-2, the left light source 2-1 and the right light source 2-2 on the multi-functional base 3 through the pitch angle adjustment device, and corresponding inclination sensors 3-02 are respectively provided to measure the inclination of the left optical imaging system 1-1, the right optical imaging system 1-2, the left light source 2-1 and the right light source 2-2 of the first optical imaging displacement sensor 7 and the second optical imaging displacement sensor 8, and correct the measurement errors caused by the inclination of the left optical imaging system 1-1, the right optical imaging system 1-2, the left light source 2-1 and the right light source 2-2.

[0132] In some embodiments, the right optical imaging system 1-2 and / or right light source 2-2 of the second optical imaging displacement sensor 8 and the left light source 2-1 and / or left optical imaging system 1-1 of the third optical imaging displacement sensor 9 are mounted on the multifunctional base 3 via a pitch angle adjustment device. This enables pitch angle adjustment of the right optical imaging system 1-2 and / or right light source 2-2 of the second optical imaging displacement sensor 8 and the left light source 2-1 and / or left optical imaging system 1-1 of the third optical imaging displacement sensor 9. At this time, the second optical imaging displacement sensor 8 and the third optical imaging displacement sensor 9 are installed on the left optical imaging system 1-1, the right optical imaging system 1-2, the left light source 2-1 and the right light source 2-2 on the multi-functional base 3 through the pitch angle adjustment device, and corresponding inclination sensors 3-02 are respectively provided to measure the inclination of the left optical imaging system 1-1, the right optical imaging system 1-2, the left light source 2-1 and the right light source 2-2 of the second optical imaging displacement sensor 8 and the third optical imaging displacement sensor 9, respectively, and correct the measurement errors caused by the inclination of the left optical imaging system 1-1, the right optical imaging system 1-2, the left light source 2-1 and the right light source 2-2.

[0133] In some embodiments, the measuring station A and the measuring station C are arranged on the bridge deck at the piers at both ends of the bridge, and the rotation angle θ of the measuring station A is A and the rotation angle θ of the measuring station B B That is the rotation angle of the bridge beam end, which realizes the measurement of the rotation angle of the bridge beam end.

[0134] In some embodiments, the first optical imaging displacement sensor 7 , the second optical imaging displacement sensor 8 , and the third optical imaging displacement sensor 9 are all symmetrical imaging displacement sensors as described in Example 1;

[0135] In two adjacent symmetrical imaging displacement sensors:

[0136] When one symmetrical imaging displacement sensor adopts the first optical imaging displacement sensor structure of Example 1, the other symmetrical imaging displacement sensor adopts the second optical imaging displacement sensor structure of Example 1;

[0137] When one symmetrical imaging displacement sensor adopts the third optical imaging displacement sensor structure of Example 1, the other symmetrical imaging displacement sensor adopts the fourth optical imaging displacement sensor structure of Example 1;

[0138] When one symmetrical imaging displacement sensor adopts the fifth optical imaging displacement sensor structure of Example 1, the other symmetrical imaging displacement sensor adopts the sixth optical imaging displacement sensor structure of Example 1.

[0139] In some embodiments, the first optical imaging displacement sensor 7 , the second optical imaging displacement sensor 8 , and the third optical imaging displacement sensor 9 are all symmetrical imaging displacement sensors as described in Example 1;

[0140] The measuring station A is set on the bridge deck 5 at the left pier of the bridge, the measuring station B is set on the bridge deck 5 at the right pier of the bridge, and the measuring station C is set on the bridge deck 5 at the longitudinal middle point of the bridge or near the longitudinal middle point of the bridge;

[0141] The bridge deflection and beam end angle measurement system based on the symmetrical imaging displacement sensor further includes:

[0142] The left pier settlement sensor is set at the measuring station S. L0 , measuring station S L0 Located outside the left pier of the bridge, measuring the settlement of the left pier of the bridge;

[0143] The right pier settlement sensor is set at the measuring station S. R0 , measuring station S R0 Located on the outside of the right pier of the bridge, measuring the settlement of the right pier of the bridge.

[0144] In some embodiments, the left pier settlement sensor includes a right optical imaging system 1-2;

[0145] The right pier settlement sensor includes a left optical imaging system 1-1;

[0146] The left light source 2-1 of the first optical imaging displacement sensor 7 corresponds to the right optical imaging system 1-2 of the left pier settlement sensor. The right optical imaging system 1-2 of the left pier settlement sensor images the left light source 2-1 of the first optical imaging displacement sensor 7 to measure the settlement of the left pier of the bridge.

[0147] The right light source 2-2 of the third optical imaging displacement sensor 9 corresponds to the left optical imaging system 1-1 of the right pier settlement sensor. The left optical imaging system 1-1 of the right pier settlement sensor images the right light source 2-2 of the third optical imaging displacement sensor 9 to realize the settlement measurement of the right pier of the bridge.

[0148] Example 3

[0149] This embodiment provides a method for measuring bridge deflection and beam end angle based on a symmetrical imaging displacement sensor, comprising the following steps:

[0150] Step S1: deploying a bridge deflection and beam end angle measurement system based on a symmetrical imaging displacement sensor on the bridge;

[0151] Step S2: Calculate the bridge deflection and beam end rotation angle using the measurement data of each measuring station of the bridge deflection and beam end rotation angle measurement system based on the symmetrical imaging displacement sensor. The specific process is as follows:

[0152] like Figures 5-6As shown, A0 is the initial position of the measuring station A; A1 is the intersection of the main light of the left optical imaging system 1-1 of the measuring station C that images the right light source 2-2 of the measuring station A and the vertical plane of the measuring station A perpendicular to the paper surface; A3 is the intersection of the main light of the right optical imaging system 1-2 of the measuring station A that images the left light source 2-1 of the measuring station C and the vertical plane of the measuring station C perpendicular to the paper surface; B0 is the initial position of the measuring station B; B1 is the intersection of the main light of the right optical imaging system 1-2 of the measuring station C that images the left light source 2-1 of the measuring station B and the vertical plane of the measuring station B perpendicular to the paper surface; B3 is the intersection of the main light of the left optical imaging system 1-2 of the measuring station B that images the right light source 2-2 of the measuring station C. The intersection of the principal ray of 1-1 and the vertical plane perpendicular to the paper plane of the measuring station C; C0 is the initial position of the symmetrical intermediate measuring station C between measuring stations A and B when the bridge has no deflection; C1 is the changed position of the symmetrical intermediate measuring station C between measuring stations A and B when the bridge has deflection; C2 is the initial position of the asymmetrical measuring station C between measuring stations A and B when the bridge has no deflection; C3 is the changed position of the asymmetrical intermediate measuring station C between measuring stations A and B when the bridge has deflection; L1 is the horizontal distance between measuring stations A and C, L2 is the horizontal distance between measuring stations B and C, and L is the horizontal distance between measuring stations A and B; θ A is the bridge rotation angle at station A, θ B is the bridge rotation angle at station B, θ C is the bridge angle at measuring station C;

[0153] When the measuring station C is an asymmetric middle measuring station between measuring stations A and B, when measuring the deflection of measuring station C, the calculation formula for the deflection value C2C3 of measuring station C is:

[0154] C2C3=(A0A1*L1+B0B1*L2) / L;

[0155] Wherein, A0A1 is the measurement value of the right optical imaging system 1-2 of the first optical imaging displacement sensor 7 at the measuring station A, and B0B1 is the measurement value of the left optical imaging system 1-1 of the third optical imaging displacement sensor 9 at the measuring station B;

[0156] The rotation angle θ of the C measuring station C The calculation formula is:

[0157] θ C =tg -1 ((B0B1-A0A1) / L);

[0158] Rotation angle θ of measuring station A A The calculation formula is:

[0159] θA =tg -1 (C2A3 / L1);

[0160] Wherein, C2A3 is the measurement value of the left optical imaging system 1-1 of the second optical imaging displacement sensor 8 at the measuring station C;

[0161] Rotation angle θ of measuring station B B The calculation formula is:

[0162] θ B =tg -1 (C2B3 / L2);

[0163] Wherein, C2B3 is the measurement value of the right optical imaging system 1-2 of the second optical imaging displacement sensor 8 at the measuring station C;

[0164] When the measuring station C is the symmetrical middle measuring station between measuring stations A and B, point C2 coincides with point C0, point C3 coincides with point C1, L1=L2, L=L1+L2; if the bridge deforms symmetrically, then θ C =0,θ A＝ θ B .

[0165] like Figures 7-8 As shown, S L The measuring station S L0 Horizontal distance from station A, S R The measuring station S R0 The horizontal distance from the measuring station B, at the measuring station S L0 The left pier settlement sensor is used to measure the relative position of station A to station S. L0 The amount of sedimentation Δ A , at the measuring station S R0 The right pier settlement sensor is used to measure the settlement of station B relative to station S. R The amount of sedimentation Δ B At the same time, the deflection and inclination measurement of the bridge measuring station C compared with the measuring stations A and B, the rotation angle measurement of the measuring stations A and B, that is, the ends of the bridge beam, and the settlement measurement of the left and right piers of the bridge are realized.

[0166] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A bridge deflection and beam end angle measurement method based on a symmetrical imaging displacement sensor, characterized in that: The following steps are involved: Step S1: deploying a bridge deflection and beam end angle measurement system based on a symmetrical imaging displacement sensor on the bridge; Step S2: Calculate the bridge deflection and beam end rotation angle using the measurement data of each measuring station of the bridge deflection and beam end rotation angle measurement system based on the symmetrical imaging displacement sensor. The specific process is as follows: A0 is the initial position of the measuring station A; A1 is the intersection of the main ray of the left optical imaging system (1-1) of the measuring station C and the vertical plane perpendicular to the paper surface of the measuring station A; A3 is the intersection of the main ray of the right optical imaging system (1-2) of the measuring station A and the vertical plane perpendicular to the paper surface of the measuring station C; B0 is the initial position of the measuring station B; B1 is the intersection of the main ray of the right optical imaging system (1-2) of the measuring station C and the vertical plane perpendicular to the paper surface of the measuring station B; B3 is the intersection of the main ray of the left optical imaging system (1-1) of the measuring station B and the vertical plane perpendicular to the paper surface of the measuring station C; C0 is the bridge When there is no deflection, the initial position of the symmetrical middle station C between stations A and B; C1 is the changed position of the symmetrical middle station C between stations A and B when the bridge has deflection; C2 is the initial position of the asymmetric station C between stations A and B when the bridge has no deflection; C3 is the changed position of the asymmetric middle station C between stations A and B when the bridge has deflection; L1 is the horizontal distance between stations A and C, L2 is the horizontal distance between stations B and C, and L is the horizontal distance between stations A and B; θ A is the bridge rotation angle at station A, θ B is the bridge rotation angle at station B, θ C is the bridge angle at measuring station C; When the measuring station C is an asymmetric middle measuring station between measuring stations A and B, when measuring the deflection of measuring station C, the calculation formula for the deflection value C2C3 of measuring station C is: C2C3=(A0A1*L1+B0B1*L2) / L; Wherein, A0A1 is the measurement value of the right optical imaging system (1-2) of the first optical imaging displacement sensor (7) at the measuring station A, and B0B1 is the measurement value of the left optical imaging system (1-1) of the third optical imaging displacement sensor (9) at the measuring station B; The rotation angle θ of the C measuring station C The calculation formula is: θ C =tg -1 ((B0B1-A0A1) / L); Rotation angle θ of measuring station A A The calculation formula is: θ A =tg -1 (C2A3 / L1); Wherein, C2A3 is the measurement value of the left optical imaging system (1-1) of the second optical imaging displacement sensor (8) at the measuring station C; Rotation angle θ of measuring station B B The calculation formula is: θ B =tg -1 (C2B3 / L2); Wherein, C2B3 is the measurement value of the right optical imaging system (1-2) of the second optical imaging displacement sensor (8) at the measuring station C.

2. The bridge deflection and beam end angle measurement method based on symmetrical imaging displacement sensor according to claim 1 is characterized in that: When the measuring station C is the symmetrical middle measuring station between measuring stations A and B, point C2 coincides with point C0, point C3 coincides with point C1, L1=L2, L=L1+L2; if the bridge deforms symmetrically, then θ C =0,θ A＝ θ B ; S L The measuring station S L0 Horizontal distance from station A, S R The measuring station S R0 The horizontal distance from the measuring station B, at the measuring station S L0 The left pier settlement sensor is used to measure the relative position of station A to station S. L0 The amount of sedimentation Δ A , at the measuring station S R0 The right pier settlement sensor is used to measure the settlement of station B relative to station S. R The amount of sedimentation Δ B At the same time, the deflection and inclination measurement of the bridge measuring station C compared with the measuring stations A and B, the rotation angle measurement of the measuring stations A and B, that is, the ends of the bridge beam, and the settlement measurement of the left and right piers of the bridge are realized.

3. The bridge deflection and beam end angle measurement method based on symmetrical imaging displacement sensor according to claim 1 is characterized in that: The bridge deflection and beam end angle measurement system based on the symmetrical imaging displacement sensor includes: A first optical imaging displacement sensor (7), the first optical imaging displacement sensor (7) being arranged at a measuring station A; A second optical imaging displacement sensor (8), the second optical imaging displacement sensor (8) being arranged at a measuring station C; A third optical imaging displacement sensor (9), the third optical imaging displacement sensor (9) being arranged at a measuring station B; Station A, Station C, and Station B are set from left to right. The first optical imaging displacement sensor (7) comprises a right optical imaging system (1-2) and a right light source (2-2); The second optical imaging displacement sensor (8) is a symmetrical imaging displacement sensor, comprising a left optical imaging system (1-1), a right optical imaging system (1-2), a left light source (2-1), and a right light source (2-2); The third optical imaging displacement sensor (9) comprises a left optical imaging system (1-1) and a left light source (2-1).

4. The bridge deflection and beam end angle measurement method based on symmetrical imaging displacement sensor according to claim 3 is characterized in that: The right optical imaging system (1-2) of the first optical imaging displacement sensor (7) corresponds to the left light source (2-1) of the second optical imaging displacement sensor (8), and the right optical imaging system (1-2) of the first optical imaging displacement sensor (7) images the left light source (2-1) of the second optical imaging displacement sensor (8); The left optical imaging system (1-1) of the second optical imaging displacement sensor (8) corresponds to the right light source (2-2) of the first optical imaging displacement sensor (7), and the left optical imaging system (1-1) of the second optical imaging displacement sensor (8) images the right light source (2-2) of the first optical imaging displacement sensor (7); The right optical imaging system (1-2) of the second optical imaging displacement sensor (8) corresponds to the left light source (2-1) of the third optical imaging displacement sensor (9), and the right optical imaging system (1-2) of the second optical imaging displacement sensor (8) images the left light source (2-1) of the third optical imaging displacement sensor (9); The left optical imaging system (1-1) of the third optical imaging displacement sensor (9) corresponds to the right light source (2-2) of the second optical imaging displacement sensor (8), and the left optical imaging system (1-1) of the third optical imaging displacement sensor (9) images the right light source (2-2) of the second optical imaging displacement sensor (8).

5. The bridge deflection and beam end angle measurement method based on symmetrical imaging displacement sensor according to claim 3 is characterized in that: The measuring station A, measuring station C and measuring station B are all arranged on the bridge deck (5); Or the measuring station A and the measuring station B are respectively arranged on the bridge deck at the piers at both ends of the bridge, and the measuring station C is arranged on the bridge deck (5) at the longitudinal middle point of the bridge or near the longitudinal middle point of the bridge.

6. The bridge deflection and beam end angle measurement method based on symmetrical imaging displacement sensor according to claim 3 is characterized in that: The symmetrical imaging displacement sensor further comprises a first mounting seat, on which the left optical imaging system (1-1), the right optical imaging system (1-2), the left light source (2-1), and the right light source (2-2) of the symmetrical imaging displacement sensor are all mounted; The first mounting base comprises a multifunctional base (3), and the multifunctional base (3) comprises: An upper connecting plate (3-07), on which the left optical imaging system (1-1), the right optical imaging system (1-2), the left light source (2-1), and the right light source (2-2) of the symmetrical imaging displacement sensor are all mounted; A horizontal rotating structure (3-04), wherein the horizontal rotating structure (3-04) is rotatably connected by a rotating part and a fixed part, and the rotating part of the horizontal rotating structure (3-04) is fixedly connected to the bottom of the upper connecting plate (3-07); A height adjustment structure (3-05), the top of the height adjustment structure (3-05) is fixedly connected to the fixed part of the horizontal rotation structure (3-04); A lower connecting plate (3-08), the lower connecting plate (3-08) is connected to the bottom of the height adjustment structure (3-05), and the lower connecting plate (3-08) is installed on the tripod (4); The upper connecting plate (3-07) is equipped with a height sensor (3-01), an inclination sensor (3-02) and a distance sensor (3-03); A data acquisition processor (3-06) is installed on the lower connecting plate (3-08), and the output ends of the left optical imaging system (1-1), the right optical imaging system (1-2), the height sensor (3-01), the tilt sensor (3-02) and the distance sensor (3-03) of the symmetrical imaging displacement sensor are all electrically connected to different input ends of the data acquisition processor (3-06).

7. The bridge deflection and beam end angle measurement method based on symmetrical imaging displacement sensor according to claim 6 is characterized in that: The first optical imaging displacement sensor (7) further comprises a second mounting seat, and the right optical imaging system (1-2) and the right light source (2-2) of the first optical imaging displacement sensor (7) are both mounted on the second mounting seat; The third optical imaging displacement sensor (9) further comprises a third mounting seat, and the left optical imaging system (1-1) and the left light source (2-1) of the third optical imaging displacement sensor (9) are both mounted on the third mounting seat; The second mounting seat and the third mounting seat are consistent with the first mounting seat of the symmetrical imaging displacement sensor in structure. Then: The output ends of the right optical imaging system (1-2), the height sensor (3-01), the tilt sensor (3-02), and the distance sensor (3-03) of the first optical imaging displacement sensor (7) are all electrically connected to different input ends of its data acquisition processor (3-06); The output ends of the left optical imaging system (1-1), the height sensor (3-01), the tilt sensor (3-02) and the distance sensor (3-03) of the third optical imaging displacement sensor (9) are all electrically connected to different input ends of its data acquisition processor (3-06).

8. The bridge deflection and beam end angle measurement method based on symmetrical imaging displacement sensor according to claim 7 is characterized in that: The right optical imaging system (1-2) and / or the right light source (2-2) of the first optical imaging displacement sensor (7) and the left optical imaging system (1-1) and / or the left light source (2-1) of the second optical imaging displacement sensor (8) are mounted on the multifunctional base (3) via a pitch angle adjustment device; The right optical imaging system (1-2) and / or the right light source (2-2) of the second optical imaging displacement sensor (8) and the left light source (2-1) and / or the left optical imaging system (1-1) of the third optical imaging displacement sensor (9) are mounted on the multifunctional base (3) via a pitch angle adjustment device; The first optical imaging displacement sensor (7), the second optical imaging displacement sensor (8), and the third optical imaging displacement sensor (9) are mounted on the multifunctional base (3) via a pitch angle adjustment device, and corresponding inclination sensors (3-02) are provided on the left optical imaging system (1-1), the right optical imaging system (1-2), the left light source (2-1), and the right light source (2-2).

9. The bridge deflection and beam end angle measurement method based on a symmetrical imaging displacement sensor according to any one of claims 3 to 8, characterized in that: The first optical imaging displacement sensor (7), the second optical imaging displacement sensor (8), and the third optical imaging displacement sensor (9) are all symmetrical imaging displacement sensors; The measuring station A is set on the bridge deck (5) at the left pier of the bridge, the measuring station B is set on the bridge deck (5) at the right pier of the bridge, and the measuring station C is set on the bridge deck (5) at the longitudinal middle point of the bridge or near the longitudinal middle point of the bridge; The bridge deflection and beam end angle measurement system based on the symmetrical imaging displacement sensor further includes: The left pier settlement sensor is set at the measuring station S. L0 , measuring station S L0 Located outside the left pier of the bridge, measuring the settlement of the left pier of the bridge; The right pier settlement sensor is set at the measuring station S. R0 , measuring station S R0 Located on the outside of the right pier of the bridge, measuring the settlement of the right pier of the bridge.

10. The bridge deflection and beam end angle measurement method based on symmetrical imaging displacement sensor according to claim 9, characterized in that: The left pier settlement sensor includes a right optical imaging system (1-2); The right pier settlement sensor includes a left optical imaging system (1-1); The left light source (2-1) of the first optical imaging displacement sensor (7) corresponds to the right optical imaging system (1-2) of the left pier settlement sensor, and the right optical imaging system (1-2) of the left pier settlement sensor images the left light source (2-1) of the first optical imaging displacement sensor (7), thereby achieving settlement measurement of the left pier of the bridge; The right light source (2-2) of the third optical imaging displacement sensor (9) corresponds to the left optical imaging system (1-1) of the right pier settlement sensor. The left optical imaging system (1-1) of the right pier settlement sensor images the right light source (2-2) of the third optical imaging displacement sensor (9), thereby achieving settlement measurement of the right pier of the bridge.

Images