阅读说明：本技术 基于数学三维坐标建模的伸缩缝三向监控系统及使用方法 (Three-way monitoring system for expansion joint based on mathematical three-dimensional coordinate modeling and use method ) 是由 孙礼俊 陈华喜 徐树正 于 2020-12-16 设计创作，主要内容包括：本发明公开了基于数学三维坐标建模的伸缩缝三向监控系统及使用方法,主要涉及数学三维坐标建模在伸缩缝监控领域的应用。包括伸缩缝机构和XYZ三向监控机构；所述XYZ三向监控机构包括X向位移监控装置、Y向位移监控装置、Z向位移监控装置；所述X向位移监控装置包括数字式激光位移传感器；所述Y向位移监控装置为位移监控电路系统,所述位移监控电路系统包括太阳能供电的电源总成、数字电流表、可伸缩弹性滑柱、滑动变阻器；所述Z向位移监控装置包括固定筒、压力弹簧、伸缩柱和数字压力传感器。本发明的有益效果在于：能对位移的X向、Y向、Z向的距离值进行实时的监测,并在远程计算机系统内形成三维坐标建模的伸缩缝位移监控图像。(The invention discloses an expansion joint three-way monitoring system based on mathematical three-dimensional coordinate modeling and a using method thereof, and mainly relates to application of the mathematical three-dimensional coordinate modeling in the field of expansion joint monitoring. Comprises an expansion joint mechanism and an XYZ three-way monitoring mechanism; the XYZ three-way monitoring mechanism comprises an X-direction displacement monitoring device, a Y-direction displacement monitoring device and a Z-direction displacement monitoring device; the X-direction displacement monitoring device comprises a digital laser displacement sensor; the Y-direction displacement monitoring device is a displacement monitoring circuit system, and the displacement monitoring circuit system comprises a solar power supply assembly, a digital ammeter, a telescopic elastic sliding column and a sliding rheostat; the Z-direction displacement monitoring device comprises a fixed cylinder, a pressure spring, a telescopic column and a digital pressure sensor. The invention has the beneficial effects that: the displacement monitoring system can monitor the displacement values in the X direction, the Y direction and the Z direction in real time, and form a three-dimensional coordinate modeling expansion joint displacement monitoring image in a remote computer system.)

1. An expansion joint three-way monitoring system based on mathematical three-dimensional coordinate modeling comprises an expansion joint mechanism; the expansion joint mechanism comprises a middle beam section steel (1), two side beam section steels (2), a plurality of displacement boxes (3) extending along the section steel direction, an anchor plate (4) and an anchor bar (5) between two adjacent displacement boxes (3); the gap between the middle beam section steel (1) and the side beam section steel (2) is sealed by a waterproof rubber strip (6); a supporting beam (7) is arranged at the bottom of the middle beam section steel (1), and two ends of the supporting beam (7) respectively extend into the displacement boxes (3) on two sides; the side beam profile steel (2) is fixedly arranged at the top of the displacement box (3), and the displacement box (3) is fixed in the embedded cavities of bridge floors on two sides through embedded steel bars (8);

the method is characterized in that:

a top pressure-bearing rubber mat support (9) is fixedly arranged on the top surface of the inner cavity of the displacement box (3), and the bottom surface of the top pressure-bearing rubber mat support (9) is slidably connected with the support beam (7); a bottom pressure-bearing rubber mat support (10) is fixedly arranged on the bottom surface of the inner cavity of the displacement box (3), and the top surface of the bottom pressure-bearing rubber mat support (10) is connected with the support beam (7) in a sliding manner;

the system also comprises an XYZ three-way monitoring mechanism; the XYZ three-way monitoring mechanism comprises an X-direction displacement monitoring device, a Y-direction displacement monitoring device and a Z-direction displacement monitoring device;

x-direction displacement monitoring device:

the X-direction displacement monitoring device comprises a digital laser displacement sensor (11), the bottom pressure-bearing rubber mat support (10) is connected with the digital laser displacement sensor (11) through a vertical support plate (12), strip-shaped sliding holes (13) for placing the digital laser displacement sensor (11) are formed in two sides of the support beam (7), reflection lenses (14) are arranged at the tail ends of two sides of the support beam (7), and a laser transmitter in the digital laser displacement sensor (11) corresponds to the reflection lenses (14);

y-direction displacement monitoring device:

the Y-direction displacement monitoring device is a displacement monitoring circuit system, and the displacement monitoring circuit system comprises a solar power supply assembly (15), a digital ammeter (16), a telescopic elastic sliding column (17) and a sliding rheostat (18); a conductive sliding sheet (19) which is in contact with a resistance wire of the slide rheostat (18) is arranged on the telescopic elastic sliding column (17), and the power supply assembly (15), the digital ammeter (16), the conductive sliding sheet (19) and the slide rheostat (18) are connected in series to form an electrified loop; the telescopic elastic sliding columns (17) are arranged at the tail ends of the two sides of the supporting beam (7), and the sliding rheostat (18) is fixed on the side wall of the displacement box (3);

z displacement monitoring devices:

the Z-direction displacement monitoring device is arranged in the top pressure-bearing rubber mat support (9), the Z-direction displacement monitoring device comprises a fixed cylinder (20), a pressure spring (21), a telescopic column (22) and a digital pressure sensor (23), the pressure spring (21) is arranged in a spring cavity (24) of the fixed cylinder (20), the digital pressure sensor (23) is arranged at the bottom end of the telescopic column (22), the bottom end of the telescopic column (22) is positioned at the top of the spring cavity (24), and a pressure plate (25) at the top of the pressure spring (21) is in contact with the digital pressure sensor (23);

the digital laser displacement sensor (11) is connected with a remote computer system through wireless signals; the digital ammeter (16) and the digital pressure sensor (23) are connected with a remote computer system through wireless signals.

2. The system for monitoring the expansion joint in three directions based on mathematical three-dimensional coordinate modeling as claimed in claim 1, wherein: the bottom surface of the top pressure-bearing rubber mat support (9) and the top surface of the bottom pressure-bearing rubber mat support (10) are both provided with stainless steel slide rails (26) which are slidably connected with the support beam (7).

3. The system for monitoring the expansion joint in three directions based on mathematical three-dimensional coordinate modeling as claimed in claim 1, wherein: the displacement monitoring circuitry further comprises a protection resistor (27); the power supply assembly (15), the digital ammeter (16), the protective resistor (27), the conductive slide sheet (19) and the slide rheostat (18) are connected in series to form a power-on loop.

4. The system for monitoring the expansion joint in three directions based on mathematical three-dimensional coordinate modeling as claimed in claim 1, wherein: the displacement monitoring circuit system further comprises a street lamp (28), the power supply assembly (15), the digital ammeter (16), the protective resistor (27), the street lamp (28), the conductive sliding sheet (19) and the slide rheostat (18) are connected in series to form an electrified loop, and the street lamp (28) is arranged on the protective piers on two sides of the bridge.

5. The use method of the expansion joint three-way monitoring system based on the mathematical three-dimensional coordinate modeling is characterized by comprising the following steps of: the method comprises the following steps:

s1: when the bridge generates X-direction telescopic displacement along the axial direction of the bridge, a digital laser displacement sensor (11) of the X-direction displacement monitoring device transmits one million laser pulses to a reflecting lens (14) and returns to a laser receiver through a laser transmitter per second, a processor in the digital laser displacement sensor (11) calculates the time required by the laser pulses to encounter the reflecting lens (14) and return to the laser receiver, and an X-direction distance value is calculated through analog and digital circuit processing and transmitted to a remote computer system through a wireless signal;

s2, when the bridge has Y-direction expansion displacement horizontally vertical to the axial direction of the bridge, the conductive sliding sheet (19) moves on the sliding rheostat (18), so that the current in the circuit is changed, the digital ammeter (16) can calculate the Y-direction distance value of the current signal through analog and digital circuit processing, and then the Y-direction distance value is transmitted to a remote computer system through a wireless signal;

s3, when the bridge has Z-direction telescopic displacement vertical to the axial direction of the bridge, the telescopic column (22) can move in the spring cavity (24) in a telescopic mode, so that telescopic deformation of the pressure spring (21) is caused, the telescopic deformation of the pressure spring (21) changes the pressure applied to the digital pressure sensor (23), and the digital pressure sensor (23) can calculate a Z-direction distance value through analog and digital circuit processing of a pressure signal and then transmit the Z-direction distance value to a remote computer system through a wireless signal;

s4, the remote computer system calibrates the X-direction distance value, the Y-direction distance value and the Z-direction distance value in the plurality of displacement boxes (3) with the distance coordinates of the same time point, so that a three-dimensional coordinate modeling expansion joint displacement image is formed in the remote computer system, and the three-way monitoring of the expansion joint is realized.

Technical Field

The invention relates to application of a mathematical three-dimensional coordinate modeling system in the field of expansion joint monitoring, in particular to an expansion joint three-way monitoring system based on mathematical three-dimensional coordinate modeling and a using method thereof.

Background

The bridge expansion joints function to accommodate displacements and couplings between the superstructure caused by vehicle loads, bridge building materials, and the external environment. Once the expansion joint device is damaged or exceeds a safety value, instability of three-way expansion displacement of the bridge can be caused, driving safety can be seriously affected, and even driving safety accidents can be caused. The GQF-MZL modular bridge expansion joint is suitable for large and medium span bridges with expansion amount of 80mm-1200mm, and the number of load-carrying vehicles is large, so that the driving safety can be ensured only by ensuring the three-dimensional expansion displacement stability and real-time monitoring of the bridge.

However, the existing expansion joint monitoring technology field is limited to computer simulation, which has great limitation, only can simulate the influence of vehicle load and bridge building materials, and can not simulate the external environment (such as windy weather and typhoon weather) realistically, so that a device for monitoring the expansion joint of the bridge in real time is better.

Disclosure of Invention

The invention aims to provide an expansion joint three-way monitoring system based on mathematical three-dimensional coordinate modeling and a using method thereof, which can monitor the X-direction distance value, the Y-direction distance value and the Z-direction distance value of the displacement of an expansion joint in real time and form an expansion joint displacement image modeled by three-dimensional coordinates in a remote computer system so as to realize the three-way monitoring of the expansion joint.

In order to achieve the purpose, the invention is realized by the following technical scheme:

an expansion joint three-way monitoring system based on mathematical three-dimensional coordinate modeling comprises an expansion joint mechanism; the expansion joint mechanism comprises a middle beam profile steel, two side beam profile steels, a plurality of displacement boxes extending along the profile steel direction, an anchor plate and an anchor bar between two adjacent displacement boxes; the gap between the middle beam section steel and the side beam section steel is sealed by a waterproof rubber strip; the bottom of the middle beam profile steel is provided with a support beam, and two ends of the support beam respectively extend into the displacement boxes on two sides; the side beam profile steel is fixedly arranged at the top of the displacement box, and the displacement box is fixed in the embedded cavities of the bridge floors on the two sides through embedded steel bars;

a top pressure-bearing rubber mat support is fixedly arranged on the top surface of the inner cavity of the displacement box, and the bottom surface of the top pressure-bearing rubber mat support is slidably connected with the supporting beam; a bottom pressure-bearing rubber mat support is fixedly arranged on the bottom surface of the inner cavity of the displacement box, and the top surface of the bottom pressure-bearing rubber mat support is slidably connected with the supporting beam;

the system also comprises an XYZ three-way monitoring mechanism; the XYZ three-way monitoring mechanism comprises an X-direction displacement monitoring device, a Y-direction displacement monitoring device and a Z-direction displacement monitoring device;

x-direction displacement monitoring device:

the X-direction displacement monitoring device comprises a digital laser displacement sensor, the bottom pressure-bearing rubber mat support is connected with the digital laser displacement sensor through a vertical support plate, strip-shaped sliding holes for placing the digital laser displacement sensor are formed in two sides of the support beam, reflecting lenses are arranged at the tail ends of the two sides of the support beam, and a laser emitter in the digital laser displacement sensor corresponds to the reflecting lenses;

y-direction displacement monitoring device:

the Y-direction displacement monitoring device is a displacement monitoring circuit system, and the displacement monitoring circuit system comprises a solar power supply assembly, a digital ammeter, a telescopic elastic sliding column and a sliding rheostat; the telescopic elastic sliding column is provided with a conductive sliding sheet which is contacted with a resistance wire of the slide rheostat, and the power supply assembly, the digital ammeter, the conductive sliding sheet and the slide rheostat are connected in series to form a power-on loop; the telescopic elastic sliding columns are arranged at the tail ends of the two sides of the supporting beam, and the sliding rheostat is fixed on the side wall of the displacement box;

z displacement monitoring devices:

the Z-direction displacement monitoring device is arranged in the top pressure-bearing rubber mat support and comprises a fixed cylinder, a pressure spring, a telescopic column and a digital pressure sensor, wherein the pressure spring is arranged in a spring cavity of the fixed cylinder, the digital pressure sensor is arranged at the bottom end of the telescopic column, the bottom end of the telescopic column is positioned at the top of the spring cavity, and a pressure plate at the top of the pressure spring is in contact with the digital pressure sensor;

the digital laser displacement sensor is connected with a remote computer system through a wireless signal; the digital ammeter and the digital pressure sensor are connected with a remote computer system through wireless signals.

The bottom surface of the top pressure-bearing rubber pad support and the top surface of the bottom pressure-bearing rubber pad support are both provided with stainless steel slide rails which are slidably connected with the supporting beams.

The displacement monitoring circuit system also comprises a protection resistor; the power supply assembly, the digital ammeter, the protective resistor, the conductive sliding sheet and the slide rheostat are connected in series to form a power-on loop.

The displacement monitoring circuit system further comprises a street lamp, the power supply assembly, the digital ammeter, the protection resistor, the street lamp, the conductive sliding sheet and the slide rheostat are connected in series to form a power-on loop, and the street lamp is arranged on the protection piers on two sides of the bridge.

The use method of the expansion joint three-way monitoring system based on the mathematical three-dimensional coordinate modeling comprises the following steps:

s1: when the bridge generates X-direction telescopic displacement along the axial direction of the bridge, a digital laser displacement sensor of the X-direction displacement monitoring device transmits one million laser pulses to a reflecting lens and returns to a laser receiver through a laser transmitter per second, a processor in the digital laser displacement sensor calculates the time required for the laser pulses to encounter the reflecting lens and return to the laser receiver, and an X-direction distance value is calculated through analog and digital circuit processing and then transmitted to a remote computer system through a wireless signal;

s2, when the bridge has Y-direction telescopic displacement horizontally vertical to the axial direction of the bridge, the conductive sliding sheet moves on the sliding rheostat, so that the magnitude of current in the circuit is changed, the digital ammeter can calculate the Y-direction distance value of the current signal through analog and digital circuit processing, and then the Y-direction distance value is transmitted to a remote computer system through wireless signals;

s3, when the bridge has Z-direction telescopic displacement vertical to the axial direction of the bridge, the telescopic column can move in the spring cavity in a telescopic mode, so that the telescopic deformation of the pressure spring is caused, the telescopic deformation of the pressure spring changes the pressure applied to the digital pressure sensor, the digital pressure sensor can calculate the Z-direction distance value through analog and digital circuit processing of the pressure signal, and then the Z-direction distance value is transmitted to a remote computer system through a wireless signal;

s4, the remote computer system calibrates the X-direction distance value, the Y-direction distance value and the Z-direction distance value in the plurality of displacement boxes with the distance coordinate of the same time point, so that an expansion joint displacement image modeled by a three-dimensional coordinate is formed in the remote computer system, and the three-way monitoring of the expansion joint is realized.

Compared with the prior art, the invention has the beneficial effects that:

this device can be through X to displacement monitoring device, Y to displacement monitoring device, Z to displacement monitoring device is to X to distance value, Y to distance value, Z carries out real-time monitoring to distance value, then pass through wireless signal with the three-dimensional displacement information of time point to remote computer system, remote computer system is to X to distance value, Y to distance value, Z carries out the distance coordinate calibration with the time point to distance value, thereby form the expansion joint displacement image that three-dimensional coordinate modeled in remote computer system, with this expansion joint three-dimensional control of realization.

Drawings

FIG. 1 is a state diagram of the present invention in use.

FIG. 2 is a diagram of the right side bridge in the present invention when the bridge is retracted and displaced inward in the X direction.

FIG. 3 is a using state diagram of the right bridge of the invention when Z-direction downward dislocation displacement h occurs.

FIG. 4 is an enlarged view of portion I of FIG. 1 in accordance with the present invention.

FIG. 5 is an enlarged view of section II of FIG. 1 according to the present invention.

Fig. 6 is a side view of the slide rheostat of the present invention along the arrow direction of fig. 5.

FIG. 7 is a schematic diagram of the displacement monitoring circuitry of the present invention.

FIG. 8 is a table showing distance coordinates calibration of the remote computer system at the same time point for the X-direction distance value, the Y-direction distance value, and the Z-direction distance value according to the present invention.

Figure 9 is a bridge expansion joint structure.

Fig. 10 is a structural view of a bridge expansion joint.

Reference numerals shown in the drawings:

1. center sill section steel; 2. side beam section steel; 3. a displacement box; 4. an anchor plate; 5. anchoring ribs; 6. a waterproof rubber strip; 7. a support beam; 8. embedding reinforcing steel bars in advance; 9. a top pressure-bearing rubber mat support; 10. a bottom pressure-bearing rubber mat support; 11. a digital laser displacement sensor; 12. a vertical support plate; 13. a strip-shaped slide hole; 14. a mirror plate; 15. a power supply assembly; 16. a digital ammeter; 17. a telescopic elastic strut; 18. a slide rheostat; 19. a conductive slip sheet; 20. a fixed cylinder; 21. a pressure spring; 22. a telescopic column; 23. a digital pressure sensor; 24. a spring cavity; 25. pressing a plate; 26. a stainless steel slide rail; 27. a protection resistor; 28. a street lamp.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.

The invention relates to an expansion joint three-way monitoring system based on mathematical three-dimensional coordinate modeling and a use method thereof.A main body structure comprises an expansion joint mechanism; as shown in fig. 9 and fig. 10 of the attached drawings of the specification, the expansion joint structure takes an GQF-MZL modular bridge expansion joint structure as an example, and comprises a center sill-shaped steel 1, two side sill-shaped steels 2, a plurality of displacement boxes 3 extending along the direction of the section steels, an anchor plate 4 and an anchor bar 5 between two adjacent displacement boxes 3; the gap between the middle beam section steel 1 and the side beam section steel 2 is sealed by a waterproof rubber strip 6; as shown in the attached drawing fig. 1 of the specification, a support beam 7 is arranged at the bottom of the center sill section steel 1, and two ends of the support beam 7 respectively extend into the displacement boxes 3 at two sides; the side beam profile steel 2 is fixedly arranged at the top of the displacement box 3, and the displacement box 3 is fixed in the embedded cavities of the bridge floors at two sides through embedded steel bars 8;

as shown in the attached drawings of the specification and fig. 1-5, a top pressure-bearing rubber pad support 9 is fixedly arranged on the top surface of the inner cavity of the displacement box 3, and the bottom surface of the top pressure-bearing rubber pad support 9 is slidably connected with the support beam 7; a bottom pressure-bearing rubber mat support 10 is fixedly arranged on the bottom surface of the inner cavity of the displacement box 3, and the top surface of the bottom pressure-bearing rubber mat support 10 is slidably connected with the support beam 7; the top pressure-bearing rubber mat support 9 and the bottom pressure-bearing rubber mat support 10 are both made of polyurethane materials with stronger plasticity, and can realize deformation adjustment in all directions under the action of large bridge deck load, so that displacement of bridge deck expansion joints is realized. The deformation of the top pressure-bearing rubber mat support 9 and the bottom pressure-bearing rubber mat support 10 in the vertical direction realizes the displacement in the Z direction, the deformation of the top pressure-bearing rubber mat support 9 and the bottom pressure-bearing rubber mat support 10 in the Y direction realizes the displacement in the Y direction, and the slidable connection of the top pressure-bearing rubber mat support 9 and the bottom pressure-bearing rubber mat support 10 with the support beam 7 realizes the displacement in the X direction.

The system also comprises an XYZ three-way monitoring mechanism; the XYZ three-way monitoring mechanism comprises an X-direction displacement monitoring device, a Y-direction displacement monitoring device and a Z-direction displacement monitoring device;

x-direction displacement monitoring device:

the X-direction displacement monitoring device comprises a digital laser displacement sensor 11, and the digital laser displacement sensor 11 with high sensitivity is adopted to monitor the X-direction telescopic displacement due to the main telescopic displacement direction of the telescopic joint during the X-direction telescopic displacement. The bottom pressure-bearing rubber mat support 10 is connected with a digital laser displacement sensor 11 through a vertical support plate 12, strip-shaped slide holes 13 for placing the digital laser displacement sensor 11 are formed in two sides of the support beam 7, reflection lenses 14 are arranged at the tail ends of the two sides of the support beam 7, and a laser emitter in the digital laser displacement sensor 11 corresponds to the reflection lenses 14; the bridge floor X drives the digital laser displacement sensor 11 to move in the range of the strip-shaped sliding hole 13 during telescopic displacement, so that the distance between the digital laser displacement sensor 11 and the reflector 14 is changed, the digital laser displacement sensor 11 transmits one million laser pulses to the reflector 14 and returns to a laser receiver through a laser transmitter per second, a processor in the digital laser displacement sensor 11 calculates the time required for the laser pulses to encounter the reflector 14 and return to the laser receiver, the X-direction distance value is calculated through analog and digital circuit processing, and then the X-direction telescopic displacement is transmitted to a remote computer system through wireless signals to monitor the X-direction telescopic displacement.

Y-direction displacement monitoring device:

the Y-direction displacement monitoring device is a displacement monitoring circuit system, and the Y-direction displacement is mainly formed by the influence of wind power on two sides of a bridge deck, particularly for large and medium bridges crossing rivers. Therefore, the Y-direction displacement monitoring adopts a mode of using the digital ammeter 16 with higher sensitivity and the slide rheostat 18 to convert the current signal into the displacement signal for monitoring. The displacement monitoring circuit system comprises a solar power supply assembly 15, a digital ammeter 16, a telescopic elastic sliding column 17 and a sliding rheostat 18; a conductive sliding sheet 19 which is in contact with a resistance wire of the slide rheostat 18 is arranged on the telescopic elastic sliding column 17, and the power supply assembly 15, the digital ammeter 16, the conductive sliding sheet 19 and the slide rheostat 18 are connected in series to form an electrified loop; the telescopic elastic sliding columns 17 are arranged at the tail ends of the two sides of the supporting beam 7, and the sliding rheostat 18 is fixed on the side wall of the displacement box 3. When the bridge generates Y-direction telescopic displacement horizontally vertical to the axial direction of the bridge, the conductive sliding sheet 19 moves on the sliding rheostat 18, so that the magnitude of current in a circuit is changed, each circle of resistance wire of the sliding rheostat 18 corresponds to one displacement (the diameter of the resistance wire), the displacement corresponds to one current value, and the digital ammeter 16 can calculate a Y-direction distance value through analog and digital circuit processing of a current signal and then transmit the Y-direction distance value to a remote computer system through a wireless signal to monitor the Y-direction telescopic displacement.

Z displacement monitoring devices:

z is to displacement monitoring device setting in top pressure-bearing cushion support 9, and Z displacement is mainly the displacement component when the influence of bridge floor both sides wind-force forms the bridge floor distortion, and the Z that is formed is to displacement volume less by the influence of vehicle load generally speaking, just can appear great Z displacement volume when the bridge floor load is too big, and Z displacement monitoring adopts digital pressure sensor 23 to monitor the best. The Z-direction displacement monitoring device comprises a fixed cylinder 20, a pressure spring 21, a telescopic column 22 and a digital pressure sensor 23, wherein the pressure spring 21 is arranged in a spring cavity 24 of the fixed cylinder 20, the digital pressure sensor 23 is arranged at the bottom end of the telescopic column 22, the bottom end of the telescopic column 22 is positioned at the top of the spring cavity 24, and a pressure plate 25 at the top of the pressure spring 21 is in contact with the digital pressure sensor 23; when the bridge appears vertical perpendicular to bridge axial direction's Z to flexible displacement, flexible post 22 can stretch out and draw back the removal in spring chamber 24 to arouse pressure spring 21's flexible deformation, thereby pressure size that digital pressure sensor 23 was applyed is changed in the flexible deformation of pressure spring 21, and digital pressure sensor 23 can be through analog and digital circuit processing with pressure signal and calculate Z to the distance value, and the rethread passes through wireless signal transmission to remote computer system, carries out Z to flexible displacement monitoring.

In summary, the digital laser displacement sensor 11, the digital ammeter 16 and the digital pressure sensor 23 are all connected with the remote computer system through wireless signals, and the remote computer system performs distance coordinate calibration at the same time point on the X-direction distance values, the Y-direction distance values and the Z-direction distance values in the plurality of displacement boxes 3, so as to form a three-dimensional coordinate modeling expansion joint displacement image in the remote computer system, thereby realizing three-dimensional monitoring of the expansion joint.

Further improvement:

in order to facilitate the sliding displacement between the top bearing rubber pad support 9 and the support beam 7 and realize the positioning movement of the expansion joint, the bottom surface of the top bearing rubber pad support 9 and the top surface of the bottom bearing rubber pad support 10 are both provided with stainless steel slide rails 26 which are slidably connected with the support beam 7.

The displacement monitoring circuitry further comprises a protection resistor 27; the power supply assembly 15, the digital ammeter 16, the protective resistor 27, the conductive slide sheet 19 and the slide rheostat 18 are connected in series to form an electrified loop. The protection resistor 27 is provided to protect the entire circuit.

The displacement monitoring circuit system further comprises a street lamp 28, the power supply assembly 15, the digital ammeter 16, the protection resistor 27, the street lamp 28, the conductive sliding piece 19 and the slide rheostat 18 are connected in series to form an electrified loop, and the street lamp 28 is arranged on the guard piers on two sides of the bridge. In order to make full use of energy, the displacement monitoring circuit system can be used for road illumination via the street lamps 28.

The use method of the expansion joint three-way monitoring system based on the mathematical three-dimensional coordinate modeling comprises the following steps:

s1: when the bridge generates X-direction telescopic displacement along the axial direction of the bridge, a digital laser displacement sensor 11 of the X-direction displacement monitoring device transmits one million laser pulses to a reflector 14 and returns to a laser receiver through a laser transmitter per second, a processor in the digital laser displacement sensor 11 calculates the time required for the laser pulses to encounter the reflector 14 and return to the laser receiver, and an X-direction distance value is calculated through analog and digital circuit processing and then transmitted to a remote computer system through wireless signals; and the X-direction distance values of a plurality of different bridge deck positions in the plurality of displacement boxes 3 are synchronously monitored so as to facilitate the subsequent modeling processing.

S2, when the bridge has Y-direction expansion displacement horizontally vertical to the axial direction of the bridge, the conductive sliding sheet 19 moves on the sliding rheostat 18, so as to change the magnitude of current in the circuit, the digital ammeter 16 calculates the Y-direction distance value of the current signal through analog and digital circuit processing, and then transmits the Y-direction distance value to a remote computer system through wireless signals; and the Y-direction distance values of a plurality of different bridge deck positions in the plurality of displacement boxes 3 are synchronously monitored so as to facilitate the subsequent modeling processing.

S3, when the bridge has Z-direction telescopic displacement vertical to the axial direction of the bridge, the telescopic column 22 can move in the spring cavity 24 in a telescopic way, so that the telescopic deformation of the pressure spring 21 is caused, the telescopic deformation of the pressure spring 21 changes the pressure applied to the digital pressure sensor 23, the digital pressure sensor 23 can calculate the Z-direction distance value through analog and digital circuit processing of the pressure signal, and then the Z-direction distance value is transmitted to a remote computer system through a wireless signal; and the Z-direction distance values of a plurality of different bridge deck positions in the plurality of displacement boxes 3 are synchronously monitored so as to facilitate the subsequent modeling processing.

S4, the remote computer system calibrates the X-direction distance values, the Y-direction distance values and the Z-direction distance values in the plurality of displacement boxes 3 with the distance coordinates of the same time point, so that an expansion joint displacement image modeled by a three-dimensional coordinate is formed in the remote computer system, and the three-way monitoring of the expansion joint is realized.

In summary, the following steps:

this device can be through X to displacement monitoring device, Y to displacement monitoring device, Z to displacement monitoring device is to X to distance value, Y to distance value, Z carries out real-time monitoring to distance value, then pass through wireless signal with the three-dimensional displacement information of time point to remote computer system, remote computer system is to X to distance value, Y to distance value, Z carries out the distance coordinate calibration with the time point to distance value, thereby form the expansion joint displacement image that three-dimensional coordinate modeled in remote computer system, with this expansion joint three-dimensional control of realization.