Short-distance wide-view digital image displacement sensor for monitoring dynamic deflection of bridge

Abstract

The invention relates to the technical field of image displacement sensors, in particular to a short-distance wide-view digital image displacement sensor for bridge dynamic deflection monitoring. A multi-stage telescopic plate is arranged at the end, away from the first multi-stage telescopic pipe, of the second multi-stage telescopic pipe, and the upper end of the multi-stage telescopic plate is slidably connected into a sliding groove in the lower end of a cleaning plate, so that the second multi-stage telescopic pipe extends; the second multi-stage telescopic pipe can push the multi-stage telescopic plate when extending, so that the multi-stage telescopic plate moves in the direction away from the first multi-stage telescopic pipe, in the process, the upper end of the multi-stage telescopic plate moves from the lower end of the cleaning plate to the middle, and in the process, the upper end of the multi-stage telescopic plate can clean a sponge strip at the lower end of the cleaning plate; the lower end of the sponge strip can scrape off impurities generated when the high-definition lens is cleaned, the cleanliness of the lower end of the sponge strip is kept, and then the cleaning effect on the high-definition lens is improved.

Description

Technical Field

[0001] The invention relates to the technical field of image displacement sensors, in particular to a short-range wide-view digital image displacement sensor for monitoring dynamic deflection of a bridge. Background Art

[0002] A displacement sensor is a device that can convert the displacement change of an object into a measurable electrical signal, optical signal or other signal output. It is widely used in many fields such as bridge monitoring.

[0003] There are many types of displacement sensors on the market, and the principles of each type are also different, for example:

[0004] Resistive displacement sensor: measures displacement by changing resistance value;

[0005] Inductive displacement sensor: works on the principle of electromagnetic induction;

[0006] Capacitive displacement sensor: measures displacement based on changes in capacitance;

[0007] Photoelectric displacement sensor: uses optical principles to measure displacement by detecting changes in light signals;

[0008] The above displacement sensors can all be used in the field of bridge monitoring. When in use, they can be installed at the mid-span, support points and other locations of the bridge main beam to monitor the vertical and horizontal displacements of the bridge under various loads (such as vehicle loads, deadweight, etc.) and environmental factors (such as temperature changes) in real time. By monitoring these displacement data for a long time, it is possible to promptly detect whether the bridge has abnormal deformation and judge the health of the bridge structure. The accurate displacement data provided by the displacement sensor provides an important basis for the maintenance and repair of the bridge. Based on the displacement monitoring results, the bridge management department can formulate a reasonable maintenance plan, such as conducting key inspections, repairs or reinforcements in areas with abnormal displacement to ensure the safe operation of the bridge.

[0009] However, when the displacement sensor is used for monitoring on a bridge, the bridge is usually exposed to the outdoor environment and is exposed to the wind and sun for a long time. Dust, sand and other particles in the air will continue to settle on the lens of the displacement sensor and accumulate to form impurities. After the impurities settle on the lens, the displacement sensor measures the displacement change of the bridge by receiving and transmitting light signals through the lens. The impurities and stains on the lens will affect the transmission and reception of the light signal, resulting in weakened signal strength, distortion or interference, so that the measured displacement data will be biased and cannot truly reflect the actual displacement of the bridge, causing misjudgment in the safety assessment of the bridge.

[0010] In response to the above problems, when the displacement sensor is in use, the staff usually maintains and cleans the lens on the displacement sensor at intervals to ensure its normal operation and avoid misjudgment. However, the displacement sensor is installed on a bridge, and the staff need to climb the bridge to maintain and clean it, which is inconvenient.

[0011] In summary, in order to solve the technical problem raised in this article, the present invention proposes a short-range, wide-view digital image displacement sensor for monitoring dynamic deflection of a bridge. Summary of the invention

[0012] The present invention proposes a short-range wide-view digital image displacement sensor for monitoring dynamic deflection of a bridge. The image displacement sensor comprises:

[0013] Sensor target, the sensor target is installed on the bridge;

[0014] The main body fixing frame is installed on the bridge, and an electric push rod is provided at the upper end of the main body fixing frame;

[0015] The sensor body is slidably mounted on the body fixing frame, and the sensor body is connected to the electric push rod on the body fixing frame;

[0016] A rectangular groove is provided at one end of the sensor body, and a high-definition lens is arranged inside the rectangular groove; an annular groove is provided on the side wall of the rectangular groove; and the lower part of the annular groove passes through the lower part of the rectangular groove;

[0017] A cleaning plate, the cleaning plate is slidably connected to the inside of the annular groove above the high-definition lens, the two sides of the upper end of the cleaning plate are connected to the upper inner wall of the annular groove through springs, a sponge strip is provided on the side of the cleaning plate that contacts the inner wall of the rectangular groove, and drawstrings connected to the cleaning plate are provided inside the annular grooves on both sides of the high-definition lens, and the drawstrings pass through the annular groove below the high-definition lens and are fixed to the main body fixing frame.

[0018] As a preferred solution of the present application; a multi-stage telescopic tube 1 is arranged inside the annular groove on both sides of the high-definition lens, the upper end of the multi-stage telescopic tube 1 is connected to the lower end of the cleaning plate, a right-angle two-way joint is arranged at the lower end of each multi-stage telescopic tube 1, the right-angle two-way joint is fixed to the inner wall of the annular groove, and a multi-stage telescopic tube 2 is arranged at the other end of the right-angle two-way joint, in the initial state, the multi-stage telescopic tube 1 is in an extended state, the multi-stage telescopic tube 2 is in a contracted state, and the interiors of the multi-stage telescopic tube 1 and the multi-stage telescopic tube 2 are filled with hydraulic oil; a multi-stage telescopic plate is arranged at one end of the multi-stage telescopic tube 2 away from the right-angle two-way joint, a slide groove is opened at the lower end of the cleaning plate, a sponge strip is located between the slide groove and the inner wall of the rectangular groove, the upper end of the multi-stage telescopic plate is slidably connected inside the slide groove, and the upper end of the multi-stage telescopic plate is in contact with the lower end of the sponge strip.

[0019] As a preferred solution of the present application; an elastic plate is provided at the upper end of the multi-stage telescopic plate, the elastic plate is located at the end of the multi-stage telescopic plate away from the multi-stage telescopic tube, and the elastic plate contacts the lower end of the cleaning plate; a triangular block is provided in the middle part of the lower end of the elastic plate, arc grooves are provided on both sides of the triangular block, and the triangular block does not contact the lower end of the sponge strip.

[0020] As a preferred solution of the present application; a baffle is provided at the upper end of the sensor body, which shields the upper end of the rectangular groove, and a water storage chamber is opened inside the baffle, and the water storage chamber contains water; when the exhaust fan rotates, external gas is drawn in from the tail of the sensor body and flows out from one end of the high-definition lens, and the gas passes through the outside of the water storage chamber during the flow.

[0021] As a preferred solution of the present application; a water outlet groove is provided at the lower end of the water storage chamber close to the high-definition lens, and a sealing plate is hinged at the opening of the water outlet groove; the water outlet groove is connected with the annular groove located above the high-definition lens; a rectangular water replenishment groove is provided inside the cleaning plate, the water replenishment groove is connected to the upper end of the sponge bar, and a rectangular water replenishment pipe is provided at the upper end of the cleaning plate, the water replenishment pipe is connected with the water replenishment groove, and in the initial state, the upper end of the water replenishment pipe extends into the interior of the water outlet groove and lifts up the sealing plate.

[0022] As a preferred solution of the present application, a rectangular through groove is provided at the upper end of the shielding plate, and the through groove connects the water storage cavity with the outside, and a filter plate is installed in the through groove.

[0023] As a preferred solution of the present application, the interior of the sensor body includes a microprocessor and a signal transceiver. The signal transceiver receives the movement signal of the electric push rod and sends the movement information to the microprocessor. The microprocessor processes the received movement information of the electric push rod to obtain monitoring data, and then the microprocessor compares the monitoring data with the initial data.

[0024] As a preferred solution of the present application, there are multiple sensor targets.

[0025] The beneficial effects of the present invention are as follows:

[0026] The hydraulic oil flowing into the multi-stage telescopic tube two squeezes it step by step, so that the multi-stage telescopic tube two extends. Since a multi-stage telescopic plate is arranged at one end of the multi-stage telescopic tube two away from the multi-stage telescopic tube one, and the upper end of the multi-stage telescopic plate is slidably connected to the inside of a slide groove provided on the outer side of the lower end of the cleaning plate, when the multi-stage telescopic tube two extends, the multi-stage telescopic plate is pushed to move in a direction away from the multi-stage telescopic tube one. During the process, the upper end of the multi-stage telescopic plate moves toward the middle at the lower end of the cleaning plate, and in the process, the upper end of the multi-stage telescopic plate cleans the sponge bar at the lower end of the cleaning plate, so that the lower end of the sponge bar scrapes off impurities generated when cleaning the high-definition lens, thereby maintaining the cleanliness of the lower end of the sponge bar, thereby improving the cleaning effect of the high-definition lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a three-dimensional diagram of the sensor body of the present invention;

[0028] Figure 2 It is a view of the internal structure of the rectangular groove in the present invention;

[0029] Figure 3 It is a structural view of the exhaust fan and the exhaust fan air outlet in the present invention;

[0030] Figure 4 is a partial cross-sectional view of the sensor body and the shielding plate in the present invention;

[0031] Figure 5 yes Figure 4 A partial cross-sectional view at center A;

[0032] Figure 6 It is a structural view of the multi-stage telescopic tube 1 and the multi-stage telescopic tube 2 in the present invention;

[0033] Figure 7 is a partial cross-sectional view of a cleaning plate in the present invention;

[0034] Figure 8 It is a structural view of the elastic plate in the present invention;

[0035] In the figure: main body fixing frame 1, sensor body 11, shielding plate 111, water storage chamber 112, water outlet groove 113, sealing plate 114, water supply groove 115, water supply pipe 116, through groove 117, filter plate 118, electric push rod 12, rectangular groove 13, high-definition lens 14, annular groove 15, multi-stage telescopic tube 1 151, right-angle two-way joint 152, multi-stage telescopic tube 2 153, multi-stage telescopic plate 154, elastic plate 155, triangular block 156, cleaning plate 16, sponge strip 17, pull belt 18, exhaust fan 19. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0037] Embodiment 1:

[0038] like Figures 1 to 8 As shown; a short-range wide-view digital image displacement sensor for monitoring dynamic deflection of a bridge, the image displacement sensor comprises:

[0039] Sensor target, the sensor target is installed on the bridge;

[0040] A main body fixing frame 1 is installed on the bridge, and an electric push rod 12 is provided at the upper end of the main body fixing frame 1;

[0041] The sensor body 11 is slidably mounted on the body fixing frame 1, and the sensor body 11 is connected to the electric push rod 12 on the body fixing frame 1;

[0042] A rectangular groove 13 is provided at one end of the sensor body 11, and a high-definition lens 14 is arranged inside the rectangular groove 13; an annular groove 15 is provided on the side wall of the rectangular groove 13; and the lower part of the annular groove 15 passes through the lower part of the rectangular groove 13;

[0043] A cleaning plate 16 is slidably connected to the inside of the annular groove 15 above the high-definition lens 14. Both sides of the upper end of the cleaning plate 16 are connected to the upper inner wall of the annular groove 15 through springs. A sponge strip 17 is provided on the side of the cleaning plate 16 that contacts the inner wall of the rectangular groove 13. Pull straps 18 connected to the cleaning plate 16 are provided inside the annular grooves 15 on both sides of the high-definition lens 14. The pull straps 18 pass through the annular groove 15 below the high-definition lens 14 and are fixed to the main body fixing frame 1.

[0044] A multi-stage telescopic tube 151 is arranged inside the annular groove 15 on both sides of the high-definition lens 14. The upper end of the multi-stage telescopic tube 151 is connected to the lower end of the cleaning plate 16. A right-angle two-way joint 152 is arranged at the lower end of each multi-stage telescopic tube 151. The right-angle two-way joint 152 is fixed to the inner wall of the annular groove 13. The other end of the right-angle two-way joint 152 is provided with a multi-stage telescopic tube 2 153. In the initial state, the multi-stage telescopic tube 151 is in an extended state. The second tube 153 is in a contracted state, and the interiors of the multi-stage telescopic tube 1 151 and the multi-stage telescopic tube 2 153 are filled with hydraulic oil; a multi-stage telescopic plate 154 is provided at one end of the multi-stage telescopic tube 2 153 away from the right-angle two-way joint 152, a slide groove is provided at the lower end of the cleaning plate 16, a sponge strip 17 is located between the slide groove and the inner wall of the rectangular groove 13, the upper end of the multi-stage telescopic plate 154 is slidably connected inside the slide groove, and the upper end of the multi-stage telescopic plate 154 is in contact with the lower end of the sponge strip 17;

[0045] The specific workflow is as follows;

[0046] When in use, the sensor target is installed at the position where the bridge needs to be fixed, and then the main body fixing frame 1 is installed. After the main body fixing frame 1 is installed, the electric push rod 12 is connected to the sensor body 11, and then the electric push rod 12 and the sensor body 11 are installed on the main body fixing frame 1. The preset operation mode of the electric push rod 12 is to extend once every three days. When the electric push rod 12 is extended, the electric push rod 12 pushes the sensor body 11, and the sensor body 11 reciprocates on the main body fixing frame 1 after being pushed. When the electric push rod 12 is extended, the electric push rod 12 pushes the sensor body 11 to move. During the process, one end of the pull belt 18 fixed on the main body fixing frame 1 remains stationary, so that when the sensor body 11 moves, the pull belt 18 on the main body fixing frame 1 pulls the pull belt 18, and the pull belt 18 pulls the cleaning plate 16 after being pulled, and during the process, the guide wheel installed at the lower end of the sensor body 11 guides and lubricates the pull belt 18 to reduce the wear of the pull belt 18, and the cleaning plate 16 is pulled by the pull belt 18. During the cleaning process, the two ends of the cleaning plate 16 move downward inside the annular grooves 15 on both sides of the high-definition lens 14, and the middle part of the cleaning plate 16 moves downward inside the rectangular groove 13. During the movement, the sponge strips 17 arranged on the inner side of the cleaning plate 16 will contact the high-definition lens 14, and then the sponge strips 17 on the inner side of the cleaning plate 16 clean the surface of the high-definition lens 14, so that the impurities settled on the surface of the high-definition lens 14 are cleaned and dropped by the cleaning plate 16, until the cleaning plate 16 moves to the inside of the annular groove 15 located at the lower side of the high-definition lens 14. Since the annular groove 15 at the lower side of the high-definition lens 14 is connected with the lower end of the sensor body 11, the impurities cleaned and dropped by the cleaning plate 16 fall from the annular groove 15 at the lower side of the high-definition lens 14; the automatic cleaning of the cleaning plate 16 is realized, so that the high-definition lens 14 is not cleaned manually, and the convenience of cleaning the high-definition lens 14 is improved; then the electric push rod 12 is retracted, and during the process, the springs on both sides of the upper end of the cleaning plate 16 drive the cleaning plate 16, so that the cleaning plate 16 moves upward and resets;

[0047] During the downward movement of the cleaning plate 16, since the multi-stage telescopic tube 151 is arranged under the cleaning plate 16 inside the annular groove 15 on both sides of the high-definition lens 14, the cleaning plate 16 will squeeze the multi-stage telescopic tube 151 when it moves downward, and the multi-stage telescopic tube 151 will shrink step by step. Since the multi-stage telescopic tube 151 and the multi-stage telescopic tube 2 153 are filled with hydraulic oil, the hydraulic oil inside the multi-stage telescopic tube 151 is squeezed when the multi-stage telescopic tube 151 shrinks. The hydraulic oil inside the multi-stage telescopic tube 151 will enter the interior of the multi-stage telescopic tube 2 153 through the right-angle two-way joint 152, so that the hydraulic oil inside the multi-stage telescopic tube 2 153, which is in a contracted state, increases, and the pressure inside the multi-stage telescopic tube 2 153 increases, and the hydraulic oil pouring into the interior of the multi-stage telescopic tube 2 153 squeezes it step by step. The multi-stage telescopic tube 153 is extended. Since a multi-stage telescopic plate 154 is provided at one end of the multi-stage telescopic tube 153 away from the multi-stage telescopic tube 1 151, and the upper end of the multi-stage telescopic plate 154 is slidably connected to the inside of a slide groove provided on the outer side of the lower end of the cleaning plate 16, when the multi-stage telescopic tube 153 is extended, the multi-stage telescopic plate 154 is pushed, so that the multi-stage telescopic plate 154 moves in a direction away from the multi-stage telescopic tube 1 151. During the process, the upper end of the multi-stage telescopic plate 154 moves toward the middle at the lower end of the cleaning plate 16, and in the process, the upper end of the multi-stage telescopic plate 154 cleans the sponge strip 17 at the lower end of the cleaning plate 16, so that the lower end of the sponge strip 17 scrapes off the impurities generated when cleaning the high-definition lens 14, maintains the cleanliness of the lower end of the sponge strip 17, and thus improves the cleaning effect of the high-definition lens 14;

[0048] When the multi-stage telescopic plate 154 moves toward the middle of the cleaning plate 16, the cleaning plate 16 moves downward synchronously, so that during the downward movement of the cleaning plate 16, the cleaning plate 16 squeezes the upper end of the multi-stage telescopic plate 154, causing the multi-stage telescopic plate 154 to shrink step by step.

[0049] Embodiment 2:

[0050] like Figures 2 to 8 As shown; an elastic plate 155 is provided at the upper end of the multi-stage telescopic plate 154, and the elastic plate 155 is located at one end of the multi-stage telescopic plate 154 away from the multi-stage telescopic tube 151, and the elastic plate 155 contacts the lower end of the cleaning plate 16; a triangular block 156 is provided at the middle part of the lower end of the elastic plate 155, and arc grooves are provided on both sides of the triangular block 156, and the triangular block 156 does not contact the lower end of the sponge strip 17;

[0051] The specific workflow is as follows;

[0052] An elastic plate 155 is provided at the upper end of the multi-stage telescopic plate 154. The elastic plate 155 can be made of elastic rubber material, and the elastic plate 155 is located at one end of the multi-stage telescopic plate 154 away from the multi-stage telescopic tube 151, and a triangular block 156 is provided in the middle of the lower end of the elastic plate 155. Arc grooves are provided on both sides of the triangular block 156, and the triangular block 156 does not contact the lower end of the sponge strip 17; when the cleaning plate 16 moves downward, the multi-stage telescopic plate 154 moves toward the middle of the cleaning plate 16 until the cleaning plate 16 moves to the bottom of the high-definition lens 14, and the upper end of the multi-stage telescopic plate 154 moves to the position of the triangular block 156. During the process, the elastic plate 155 contacts the arc grooves on both sides of the triangular block 156. As the multi-stage telescopic plate 154 moves toward the middle, the two sides of the triangular block 156 squeeze the elastic plate 155. After the elastic plate 155 is squeezed, the elastic plates 155 on both sides of the triangular block 156 bend downward, so that the impurities cleaned on the lower side of the cleaning plate 16 are pushed downward. Until the cleaning plate 16 moves to the bottom, the elastic plates 155 on both sides of the triangular block 156 approach each other, and cooperate to clean and drop the impurities from the cleaning plate 16. When the cleaning plate 16 is reset, the elastic plate 155 is reset, and the multi-stage telescopic plate 154 moves to the end away from the triangular block 156. During the process, the upper end of the multi-stage telescopic plate 154 and the lower end of the cleaning plate 16 are cleaned twice, thereby improving the cleaning effect of the cleaning plate 16.

[0053] Embodiment three:

[0054] like Figures 2 to 8 As shown; a shielding plate 111 is provided at the upper end of the sensor body 11, and the shielding plate 111 shields the upper end of the rectangular groove 13. A water storage chamber 112 is provided inside the shielding plate 111, and water is contained inside the water storage chamber 112; when the exhaust fan 19 rotates, external gas is drawn in from the tail of the sensor body 11 and flows out from one end of the high-definition lens 14, and the gas passes through the outer side of the water storage chamber 112 during the flow;

[0055] A water outlet groove 113 is provided at the lower end of the water storage chamber 112 near the high-definition lens 14, and a sealing plate 114 is hinged at the opening of the water outlet groove 113; the water outlet groove 113 is connected to the annular groove 15 located above the high-definition lens 14; a rectangular water replenishment groove 115 is provided inside the cleaning plate 16, and the water replenishment groove 115 is connected to the upper end of the sponge strip 17, and a rectangular water replenishment pipe 116 is provided at the upper end of the cleaning plate 16, and the water replenishment pipe 116 is connected to the water replenishment groove 115. In the initial state, the upper end of the water replenishment pipe 116 extends into the interior of the water outlet groove 113 and lifts up the sealing plate 114;

[0056] A rectangular through slot 117 is formed at the upper end of the shielding plate 111. The through slot 117 allows the water storage chamber 112 to communicate with the outside. A filter plate 118 is installed in the through slot 117.

[0057] The specific workflow is as follows;

[0058] By setting a shielding plate 111 at the upper end of the collective, the shielding plate 111 blocks the upper end of the rectangular groove 13. When the upper end of the rectangular groove 13 is blocked, the impurities that fall on the high-definition lens 14 are reduced, and a water storage chamber 112 is set inside the shielding plate 111, and a water source is contained inside the water storage chamber 112. When the exhaust fan 19 rotates, the exhaust fan 19 rotates by setting a motor. When the exhaust fan 19 rotates, the external gas is drawn into the sensor body 11 from the tail of the sensor body 11, and then the gas inside the sensor body 11 is discharged, so that the heat inside the sensor body 11 is dissipated; and when the external gas is ejected from the sensor body 11, the gas is ejected from one end of the high-definition lens 14; so that the gas outlet passes through the outside of the water storage chamber 112, the water source inside the water storage chamber 112 plays a role in cooling the gas, and reduces the speed at which the external temperature enters the sensor body 11; thereby improving the temperature of the sensor body 11 when it is working to maintain a suitable condition;

[0059] When the gas inside the sensor body 11 is ejected from one end of the high-definition lens 14, when dust impurities from the outside are close to the high-definition lens 14, the gas ejected from the sensor body 11 pushes the dust impurities away from the high-definition lens 14, thereby reducing dust deposition on the high-definition lens 14, thereby improving the cleaning effect of the high-definition lens 14;

[0060] A water outlet trough 113 is provided at the lower end of the water storage chamber 112, and the water outlet trough 113 is located at one end of the water storage chamber 112 close to the high-definition lens 14, and a sealing plate 114 is hinged inside the water outlet trough 113, and the water outlet trough 113 is communicated with the inside of the annular groove 15 located above the high-definition lens 14; and when the electric push rod 12 is not working, a water replenishment pipe 116 is provided at the upper end of the cleaning plate 16, and a water replenishment trough 115 is provided inside the cleaning plate 16, and the water replenishment trough 115 is connected to the upper part of the sponge bar 17. In the initial state, the water replenishment pipe 116 enters into the water outlet trough 113, and the upper end of the water replenishment pipe 116 pushes the sealing plate 114 at the upper end of the water outlet trough 113. When the sealing plate 114 is pushed, the sealing plate 114 After being pushed upward, the water source inside the water storage chamber 112 enters the water replenishment tank 115 through the water replenishment pipe 116, and then enters the sponge bar 17 through the water replenishment tank 115, so that the sponge bar 17 is in a wet state, and then the electric push rod 12 extends, the cleaning plate 16 moves downward, and the water replenishment pipe 116 moves downward. During the process, when the water replenishment pipe 116 has not moved out of the water outlet tank 113, the sealing plate 114 is no longer lifted by the water replenishment pipe 116, and the sealing plate 114 falls back downward, and the sealing plate 114 closes the water outlet tank 113 again; then the cleaning plate 16 moves downward, and the sponge bar 17 on the inner side of the lower end of the cleaning plate 16 cleans the high-definition lens 14, and the wet sponge bar 17 improves the cleaning effect of the high-definition lens 14;

[0061] A through groove 117 is provided at the upper end of the shielding plate 111 so that the through groove 117 is connected to the outside of the water storage chamber 112, and a filter plate 118 is arranged inside the through groove 117, so that when it is raining outside, rainwater can fall onto the filter plate 118 at the upper end of the through groove 117, and then the rainwater falls into the water storage chamber 112 through the filter plate 118. In the process, the filter plate 118 filters impurities in the rainwater, thereby playing the effect of replenishing water inside the water storage chamber 112, thereby reducing the number of times the staff replenishes water inside the water storage chamber 112.

[0062] Embodiment 4:

[0063] like Figures 3 to 8 As shown; the interior of the sensor body 11 includes a microprocessor and a signal transceiver, the signal transceiver receives the movement signal of the electric push rod 12, and sends the movement information to the microprocessor; the microprocessor processes the received movement information of the electric push rod 12 to obtain monitoring data, and then the microprocessor compares the monitoring data with the initial data;

[0064] The number of sensor targets is multiple;

[0065] The specific workflow is as follows;

[0066] A microprocessor is provided inside the sensor body 11, the microprocessor is a single chip microcomputer, and a data transceiver is provided; the signal transceiver receives the movement signal of the electric push rod 12, and the signal transceiver sends the movement signal to the microprocessor, the microprocessor processes the received movement signal, obtains the movement data of the electric push rod 12 when it moves, and synchronously detects the sensor target during the movement; the position data of the sensor target during the movement of the electric push rod 12 is analyzed in real time, and the real-time monitoring data is compared with the initial data;

[0067] The initial data is that when the sensor body 11 is installed, the distance between the high-definition lens 14 and the sensor target is debugged, and multiple monitoring points are pre-set, and the number of monitoring points is at least two, such as monitoring point A and monitoring point B. For example, when the electric push rod 12 is not working, the high-definition lens 14 records the state of the sensor target, and then the electric push rod 12 is pushed to point A, and then the distance between point A and the sensor target is recorded, and then the state of point A and the sensor target at this distance is recorded; then the electric push rod 12 is pushed to point B, and then the distance between point B and the sensor target is recorded, and then the state of point B and the sensor target at this distance is recorded; after recording, it is used as the initial data; After recording, when the sensor body 11 is working and the electric push rod 12 is not working, the high-definition lens 14 always detects the state of the sensor target. When the electric push rod 12 is working, the high-definition lens 14 always moves to each monitoring point, records the monitoring data of the sensor target at the monitoring point, and compares it with the pre-set initial data when moving to each monitoring point to obtain the monitoring data; by moving the sensor body 11 back and forth on the body fixing frame 1, different positions of the same part of the bridge are monitored to obtain more comprehensive structural response data, which effectively makes up for the defect of the limited monitoring range of the fixed sensor, improves the monitoring accuracy, and more accurately reflects the actual working state of the bridge structure;

[0068] And the number of sensor targets is multiple, which can be multiple sensor targets, realizing one machine with multiple targets and high data correlation: reducing the cost of multi-point measurement and giving multi-point displacement parameters at the same time.

Claims

1. A short-range, wide-view digital image displacement sensor for monitoring dynamic deflection of a bridge, characterized in that: Image displacement sensors include: Sensor target, the sensor target is installed on the bridge; The main body fixing frame is installed on the bridge, and an electric push rod is provided at the upper end of the main body fixing frame; The sensor body is slidably mounted on the body fixing frame, and the sensor body is connected to the electric push rod on the body fixing frame; A rectangular groove is provided at one end of the sensor body, and a high-definition lens is arranged inside the rectangular groove; an annular groove is provided on the side wall of the rectangular groove; and the lower part of the annular groove passes through the lower part of the rectangular groove; A cleaning plate, the cleaning plate is slidably connected to the inside of the annular groove above the high-definition lens, the two sides of the upper end of the cleaning plate are connected to the upper inner wall of the annular groove through springs, a sponge strip is provided on the side of the cleaning plate that contacts the inner wall of the rectangular groove, and drawstrings connected to the cleaning plate are provided inside the annular grooves on both sides of the high-definition lens, and the drawstrings pass through the annular groove below the high-definition lens and are fixed to the main body fixing frame.

2. The short-range wide-view digital image displacement sensor for monitoring dynamic deflection of a bridge as claimed in claim 1, characterized in that: A multi-stage telescopic tube 1 is arranged inside the annular groove on both sides of the high-definition lens, the upper end of the multi-stage telescopic tube 1 is connected to the lower end of the cleaning plate, a right-angle two-way joint is arranged at the lower end of each multi-stage telescopic tube 1, the right-angle two-way joint is fixed to the inner wall of the annular groove, and a multi-stage telescopic tube 2 is arranged at the other end of the right-angle two-way joint. In the initial state, the multi-stage telescopic tube 1 is in an extended state, and the multi-stage telescopic tube 2 is in a contracted state, and the interiors of the multi-stage telescopic tube 1 and the multi-stage telescopic tube 2 are filled with hydraulic oil; a multi-stage telescopic plate is arranged at one end of the multi-stage telescopic tube 2 away from the right-angle two-way joint, a sliding groove is opened at the lower end of the cleaning plate, a sponge strip is located between the sliding groove and the inner wall of the rectangular groove, the upper end of the multi-stage telescopic plate is slidably connected inside the sliding groove, and the upper end of the multi-stage telescopic plate contacts with the lower end of the sponge strip.

3. The short-range wide-view digital image displacement sensor for monitoring dynamic deflection of a bridge as claimed in claim 2, characterized in that: An elastic plate is arranged at the upper end of the multi-stage telescopic plate, the elastic plate is located at the end of the multi-stage telescopic plate away from the multi-stage telescopic tube, and the elastic plate contacts the lower end of the cleaning plate; a triangular block is arranged in the middle part of the lower end of the elastic plate, arc grooves are provided on both sides of the triangular block, and the triangular block does not contact the lower end of the sponge strip.

4. The short-range wide-view digital image displacement sensor for monitoring dynamic deflection of a bridge as claimed in claim 1, characterized in that: A baffle is provided at the upper end of the sensor body, which shields the upper end of the rectangular groove. A water storage chamber is opened inside the baffle, and the water storage chamber contains water. External gas enters from the tail of the sensor body and flows out from one end of the high-definition lens. The gas passes through the outside of the water storage chamber during the flow.

5. The short-range wide-view digital image displacement sensor for monitoring dynamic deflection of a bridge as claimed in claim 4, characterized in that: A water outlet groove is provided at the lower end of the water storage chamber close to the high-definition lens, and a sealing plate is hinged at the opening of the water outlet groove; the water outlet groove is connected with the annular groove located above the high-definition lens; a rectangular water replenishment groove is provided inside the cleaning plate, and the water replenishment groove is connected to the upper end of the sponge strip; a rectangular water replenishment pipe is provided at the upper end of the cleaning plate, and the water replenishment pipe is connected with the water replenishment groove. In the initial state, the upper end of the water replenishment pipe extends into the interior of the water outlet groove and lifts up the sealing plate.

6. The short-range wide-view digital image displacement sensor for monitoring dynamic deflection of a bridge as claimed in claim 4, characterized in that: A rectangular through slot is provided at the upper end of the shielding plate, and the through slot enables the water storage cavity to communicate with the outside, and a filter plate is installed in the through slot.

7. The short-range wide-view digital image displacement sensor for monitoring dynamic deflection of a bridge as claimed in claim 1, characterized in that: The sensor body includes a microprocessor and a signal transceiver. The signal transceiver receives the movement signal of the electric push rod and sends the movement information to the microprocessor; the microprocessor processes the received movement information of the electric push rod to obtain monitoring data, and then the microprocessor compares the monitoring data with the initial data.

8. The short-range wide-view digital image displacement sensor for monitoring dynamic deflection of a bridge as claimed in claim 7, characterized in that: The number of sensor targets is plural.

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