CN212721971U - Bridge dynamic deflection monitoring device - Google Patents
Bridge dynamic deflection monitoring device Download PDFInfo
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- CN212721971U CN212721971U CN202021620859.XU CN202021620859U CN212721971U CN 212721971 U CN212721971 U CN 212721971U CN 202021620859 U CN202021620859 U CN 202021620859U CN 212721971 U CN212721971 U CN 212721971U
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Abstract
The utility model relates to a bridge dynamic deflection monitoring devices, include: the system comprises a power supply assembly, a data processing terminal and a plurality of wireless inclinometers; the power supply assembly and the data processing terminal are respectively connected with the wireless inclinometer; the power supply assembly is used for providing power supply for the wireless inclinometer, the wireless inclinometer is respectively used for measuring the inclination of different positions of the bridge body to be measured, the data processing terminal is used for receiving a plurality of inclinations, and the dynamic deflection of the bridge body to be measured is determined by the inclinations of the different positions, so that the installation and the use are effectively facilitated, the time is saved, the monitoring efficiency is improved, and the accuracy of a monitoring result is ensured.
Description
Technical Field
The utility model relates to a dynamic deflection monitoring technology field, concretely relates to bridge dynamic deflection monitoring devices.
Background
The deflection of the bridge is a main technical index for measuring the bearing capacity and the safety degree of a bridge under the condition of gravity, a dynamic deflection monitoring device of a large-span bridge is an important device for monitoring the safety of the bridge, at present, most of the devices adopt a photoelectric deflection instrument, a communicating tube static level instrument and an inclination angle deflection instrument, wherein the inclination angle deflection instrument is most applied, has better dynamic response characteristic and does not need a static reference point, and the large-span dynamic deflection monitoring instrument is a better large-span dynamic deflection monitoring instrument and generally needs to be provided with more dense monitoring points to obtain the required measurement precision,
however, the existing inclination angle measuring and scratching instrument is in wired transmission, when a plurality of monitoring points are arranged, complex wiring lines can be generated, a large amount of time is wasted during installation and use, and the monitoring efficiency is relatively low.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at overcoming the not enough of prior art, providing a bridge dynamic deflection monitoring devices to improve efficiency and the accuracy to the monitoring of large-span bridge dynamic deflection.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a bridge dynamic deflection monitoring device comprises: the system comprises a power supply assembly, a data processing terminal and a plurality of wireless inclinometers;
the power supply assembly and the data processing terminal are respectively connected with the wireless inclinometer;
the power supply assembly is used for supplying power to the wireless inclinometer, the wireless inclinometer is respectively used for measuring the inclination of the measured bridge body at different positions, and the data processing terminal is used for receiving the inclinations and determining the dynamic deflection of the measured bridge body according to the inclinations at different positions.
Optionally, the wireless inclinometer includes: the device comprises a wireless module, an inclination angle sensing module and a data conversion module;
the wireless module and the inclination angle sensing module are both connected with the data conversion module;
the inclination angle sensing module is used for measuring the inclination angles of different positions of the bridge body to be measured, the wireless module is used for calibrating a clock of the data conversion module through Beidou time service, and the data conversion module is used for converting the inclination angle data into digital quantity from analog quantity.
Optionally, the tilt sensing module includes: the device comprises a sensor circuit, a signal amplification circuit and a passive filter circuit;
the sensor circuit is connected with the signal amplification circuit, and the signal amplification circuit is connected with the passive filter circuit;
the sensor circuit is used for measuring inclination angle data of the bridge body to be measured, the signal amplification circuit is used for amplifying the inclination angle data so as to improve the resolution of the sensor circuit, and the passive filter circuit is used for improving the signal-to-noise ratio of the inclination angle data.
Optionally, the sensor circuit includes an SCA103T chip, a first capacitor, a second capacitor, a third capacitor, a first resistor, and a third resistor;
the first capacitor is connected with the SCA103T chip through the first resistor, the third capacitor is connected with the SCA103T chip through the third resistor, the second capacitor is connected with the SCA103T chip, and the first capacitor, the second capacitor and the third capacitor are all grounded.
Optionally, the signal amplifying circuit includes: an INA114 chip and a second resistor;
the INA114 chip is connected with the SCA103T chip, and the INA114 chip is used for amplifying the output signals of the SCA103T chip.
Optionally, the passive filter circuit includes: the circuit comprises an OP07DP chip, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a fourth capacitor and a sixth capacitor;
the fourth resistor and the fifth resistor are connected with the OP07DP chip, the fourth capacitor, the sixth capacitor and the seventh resistor form a closed loop, one end of the seventh resistor is further connected with the sixth resistor, the other end of the seventh resistor is connected with the OP07DP chip, and the fourth capacitor and the sixth capacitor are also grounded.
Optionally, the data processing terminal includes a cloud platform and a deflection calculation terminal;
one end of the cloud platform is connected with the wireless inclinometer, and the other end of the cloud platform is connected with the deflection calculation terminal;
the cloud platform is used for receiving the inclination angle data collected by the wireless inclinometer and transmitting the data to the deflection calculation terminal, and the deflection calculation terminal calculates the dynamic deflection of the measured bridge body according to the inclination angle data.
Optionally, the wireless module is a 4G wireless module;
the 4G wireless module is an SIM7600CE MIS module with the Beidou information function.
Optionally, the data conversion module includes an AD7606 chip, an MSP chip, and a peripheral circuit;
the peripheral circuit is connected with the AD7606 chip and the MSP chip, and the AD7606 chip, the MSP chip and the peripheral circuit are matched to convert inclination angle data from analog quantity to digital quantity.
Optionally, the power supply assembly is a 12V lithium battery solar power supply system.
The beneficial effect of this application does:
the application provides a pair of bridge dynamic deflection monitoring devices includes: the system comprises a power supply assembly, a data processing terminal and a plurality of wireless inclinometers, wherein the power supply assembly and the data processing terminal are respectively connected with the wireless inclinometers; the power supply assembly is used for providing power supply for the wireless inclinometer, the wireless inclinometer is respectively used for measuring the inclination of different positions of the bridge body to be measured, the data processing terminal is used for receiving a plurality of inclinations, the dynamic deflection of the bridge body to be measured is determined by the inclinations of the different positions, the inclinations of the different positions of the bridge body to be measured are collected through the wireless inclinometer, the problem of complex wiring of wired transmission is solved during data transmission, the installation and collection are convenient, meanwhile, the wireless inclinometer adopts a Beidou synchronous time service mode to realize synchronous collection, the problem of data collection influenced by network random time delay is solved, the monitoring efficiency of the dynamic deflection of the bridge is improved, and the monitoring accuracy is also ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a bridge dynamic deflection monitoring device provided by an embodiment of the present invention;
FIG. 2 is a circuit schematic of a sensor circuit of the wireless inclinometer of FIG. 1;
FIG. 3 is a circuit schematic of a signal amplification circuit of the wireless inclinometer of FIG. 1;
FIG. 4 is a circuit schematic of the passive filter circuit of the wireless inclinometer of FIG. 1;
fig. 5 is a circuit schematic of the power supply circuit of the wireless inclinometer of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a bridge dynamic deflection monitoring device provided by the embodiment of the present invention.
As shown in fig. 1, the bridge dynamic deflection monitoring device of the present embodiment includes: the power supply module 1, data processing terminal 3 and a plurality of wireless inclinometers 2, wherein, power supply module 1 and data processing terminal 3 link to each other with wireless inclinometer 2 respectively, power supply module 1 is used for providing power supply for wireless inclinometer 2, wireless inclinometer 2 is used for measuring the gradient of being surveyed the different positions of bridge body respectively, data processing terminal 3 is used for receiving a plurality of gradients, and confirm the dynamic deflection of being surveyed the bridge body by a plurality of gradients of different positions, wherein, power supply module 1 can adopt 12V lithium cell solar energy power supply system.
In a specific implementation process, the wireless inclinometers 2 are installed at the target position of the bridge body to be measured, due to wireless data transmission, the situation that the layout is affected by the problem of conducting wires can not occur in the installation process, and the number of the wireless inclinometers 2 can be set randomly according to the span of the bridge. Wherein, specific wireless inclinometer 2 includes: the device comprises a wireless module, an inclination angle sensing module and a data conversion module; the wireless module and the inclination angle sensing module are both connected with the data conversion module; the inclination sensing module is used for measuring the inclinations of different positions of the measured bridge body, the wireless module is used for calibrating a clock of the data conversion module through Beidou time service, and the data conversion module is used for converting the inclination data into digital quantity through analog quantity. And the inclination sensing module includes: the device comprises a sensor circuit, a signal amplification circuit and a passive filter circuit; the sensor circuit is connected with the signal amplifying circuit, and the signal amplifying circuit is connected with the passive filter circuit; sensor circuit is used for measuring the inclination data of being surveyed the bridge body, signal amplification circuit is used for enlargiing inclination data, in order to improve sensor circuit's resolution ratio, passive filter circuit is used for improving inclination data's SNR, wireless module can adopt 4G wireless module, 4G wireless module is SIM7600CE MIS module for having big dipper information function, big dipper time service through real-time reading 4G wireless module, carry out millimeter level's accurate time service to data conversion circuit's clock, then unified each sensor's data conversion circuit starts inclination data conversion function at whole minute moment, simultaneously when data receiving end's data is analyzed, time in the data packet is accurate, thereby the synchronous acquisition of each sensor's millimeter level data has been realized. The data conversion module can be an AD7606 chip, an MSP chip and a peripheral circuit; the peripheral circuit is connected with the AD7606 chip and the MSP chip, and the AD7606 chip, the MSP chip and the peripheral circuit are matched to convert the inclination angle data from analog quantity to digital quantity.
The Beidou information read by the 4G wireless module contains millimeter-scale clock information, the clock of the data conversion circuit is calibrated by analyzing the clock information, and then the function of converting the inclination angle data of the data conversion circuit into digital quantity by analog quantity is started at the next whole minute moment in the bottom layer software of the inclinometer; the data packet sent by the 4G wireless module in real time contains the absolute time of the 1 st data conversion of the data packet with the precision of millisecond, and the time is read from the calibrated data conversion circuit clock. Because the inclination of the large-span bridge beam body is very small, the MEMS inclination angle chip is required to have the resolution ratio superior to 0.001 degree and good signal-to-noise ratio, the resolution ratio of the MEMS chip is indirectly improved by designing an amplifying circuit to amplify the output signal of the MEMS inclination angle chip by 10 times, and then the signal-to-noise ratio of the signal is improved by designing low-noise passive low-pass filtering, so that the inclination induction of the large-span bridge beam body can be realized.
FIG. 2 is a circuit schematic of the sensor circuit of the wireless inclinometer 2 of FIG. 1; FIG. 3 is a circuit schematic of the signal amplification circuit of the wireless inclinometer 2 of FIG. 1; FIG. 4 is a circuit schematic of the passive filter circuit of the wireless inclinometer 2 of FIG. 1; fig. 5 is a circuit schematic of the power supply circuit of the wireless inclinometer 2 of fig. 1.
Specifically, as shown in fig. 2, the sensor circuit includes an SCA103T chip, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first resistor R1, and a third resistor R3; the first capacitor C1 is connected with the SCA103T chip through a first resistor R1, the third capacitor C3 is connected with the SCA103T chip through a third resistor R3, the second capacitor C2 is connected with the SCA103T chip, and the first capacitor C1, the second capacitor C2 and the third capacitor C3 are all grounded. Specifically, as shown in fig. 3, the signal amplification circuit includes: the INA114 chip and a second resistor R2; the INA114 chip is connected to the SCA103T chip, and the INA114 chip is used for amplifying the output signals of the SCA103T chip. Specifically, as shown in fig. 4, the passive filter circuit includes: the chip comprises an OP07DP chip, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a fourth capacitor C4 and a sixth capacitor C6; the fourth resistor R4 and the fifth resistor R5 are both connected with an OP07DP chip, the fourth capacitor C4, the sixth capacitor C6 and the seventh resistor R7 form a closed loop, one end of the seventh resistor R7 is also connected with the sixth resistor R6, the other end of the seventh resistor R7 is connected with the OP07DP chip, and the fourth capacitor C4 and the sixth capacitor C6 are also both grounded. The specific power supply circuit chips can be a 5V power supply circuit of IB1205LS-1W and a positive and negative power supply circuit of WRA 1212S. It should be noted that the specific type of the chip is only an exemplary illustration and does not constitute any mandatory limiting effect, wherein the more specific connection relationship can be understood by referring to the specific drawings, and the connection of each pin of the specific chip is not explicitly described in detail.
The specific data processing terminal 3 may include a cloud platform and a deflection calculation terminal; one end of the cloud platform is connected with the wireless inclinometer 2, and the other end of the cloud platform is connected with the deflection calculation terminal; the cloud platform is used for receiving the inclination angle data collected by the wireless inclinometer 2 and transmitting the data to the deflection calculation terminal, and the deflection calculation terminal calculates the dynamic deflection of the bridge body to be measured according to the inclination angle data. In order to improve the real-time performance of data receiving, a data receiving port can be independently configured for data receiving of each 4G wireless inclinometer 2, a data sending port is also independently configured for data forwarding to a client, data packet queuing caused by port sharing is avoided, the real-time performance is reduced, G01NET structure health monitoring cloud platform data receiving and transparent transmission forwarding software can be installed on a cloud platform, a deflection computing terminal can directly calculate deflection of a G01NETQL bridge, and the deflection can also be calculated according to the following steps:
step 1: receiving dynamic gradient data of each monitoring point on a certain span beam body;
step 2: the inclination data is converted to a tilt rate according to the following formula:
l ═ tan (θ/57.3); theta is the inclination and the unit is degree; l is the rate of inclination; tan is the trigonometric tangent function.
And 3, step 3: and (3) interpolating the gradient array based on the monitoring points by adopting a cubic sample difference value and a least square fitting function to obtain a gradient curve array of the whole span at each moment.
And 4, step 4: integrating the whole span inclination rate curve at each moment once to obtain a deflection curve array of the whole span bridge at each moment;
and 5, step 5: the drift error generated in the digital integration process can be corrected by increasing the boundary condition of which the cross-end deflection value is 0. The following possible modifications were obtained by a number of experiments: the deflection curve array obtained by the integral is assumed to be f ═ f0 f1 f2 … fs]S is the length of the whole span beam body and the unit is meter; establishing a correction function g (x) x (s-x), and quantizing the correction function to obtain an array g (g)0 g1 g2 … gs]And multiplying the two arrays to obtain a modified deflection curve array f ═ f0×g0 f1×g1 f2×g2 … fs×gs]Therefore, the dynamic deflection of the bridge body to be measured can be obtained.
In summary, the following are: the method comprises the steps of obtaining inclination values of a plurality of positions of a beam body of the bridge by knowing the inclination of the plurality of positions of the beam body of the bridge, carrying out difference value fitting on the basis of the inclination values of the plurality of positions due to the fact that the beam body belongs to elastic deformation to obtain a whole-span inclination curve of the beam body, and then integrating the whole-span inclination curve to obtain a whole-span deflection curve.
The dynamic deflection monitoring device for the bridge provided by the embodiment comprises: the system comprises a power supply assembly 1, a data processing terminal 3 and a plurality of wireless inclinometers 2, wherein the power supply assembly 1 and the data processing terminal 3 are respectively connected with the wireless inclinometers 2; the power supply assembly 1 is used for providing power supply for the wireless inclinometer 2, the wireless inclinometer 2 is respectively used for measuring the inclination of different positions of the bridge body to be measured, the data processing terminal 3 is used for receiving a plurality of inclinations, the dynamic deflection of the bridge body to be measured is determined by the inclinations of the different positions, the inclinations of the different positions of the bridge body to be measured are acquired through the wireless inclinometer 2, the problem of complex wiring of wired transmission is solved during data transmission, the installation and acquisition are convenient, meanwhile, the wireless inclinometer 2 can realize synchronous acquisition by adopting a Beidou synchronous time service mode, the problem of data acquisition influenced by random time delay of a network is solved, the monitoring efficiency of the dynamic deflection of the bridge is improved, and the monitoring accuracy is also ensured.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present invention, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means at least two unless otherwise specified.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. The utility model provides a bridge dynamic deflection monitoring devices which characterized in that includes: the system comprises a power supply assembly, a data processing terminal and a plurality of wireless inclinometers;
the power supply assembly and the data processing terminal are respectively connected with the wireless inclinometer;
the power supply assembly is used for supplying power to the wireless inclinometer, the wireless inclinometer is respectively used for measuring the inclination of the measured bridge body at different positions, and the data processing terminal is used for receiving the inclinations and determining the dynamic deflection of the measured bridge body according to the inclinations at different positions.
2. The bridge dynamic deflection monitoring device of claim 1, wherein the wireless inclinometer comprises: the device comprises a wireless module, an inclination angle sensing module and a data conversion module;
the wireless module and the inclination angle sensing module are both connected with the data conversion module;
the inclination angle sensing module is used for measuring the inclination angles of different positions of the bridge body to be measured, the wireless module is used for calibrating a clock of the data conversion module through Beidou time service, and the data conversion module is used for converting the inclination angle data into digital quantity from analog quantity.
3. The bridge dynamic deflection monitoring device of claim 2, wherein the tilt sensing module comprises: the device comprises a sensor circuit, a signal amplification circuit and a passive filter circuit;
the sensor circuit is connected with the signal amplification circuit, and the signal amplification circuit is connected with the passive filter circuit;
the sensor circuit is used for measuring inclination angle data of the bridge body to be measured, the signal amplification circuit is used for amplifying the inclination angle data so as to improve the resolution of the sensor circuit, and the passive filter circuit is used for improving the signal-to-noise ratio of the inclination angle data.
4. The bridge dynamic deflection monitoring device of claim 3, wherein the sensor circuit comprises an SCA103T chip, a first capacitor, a second capacitor, a third capacitor, a first resistor and a third resistor;
the first capacitor is connected with the SCA103T chip through the first resistor, the third capacitor is connected with the SCA103T chip through the third resistor, the second capacitor is connected with the SCA103T chip, and the first capacitor, the second capacitor and the third capacitor are all grounded.
5. The bridge dynamic deflection monitoring device of claim 4, wherein the signal amplification circuit comprises: an INA114 chip and a second resistor;
the INA114 chip is connected with the SCA103T chip, and the INA114 chip is used for amplifying the output signals of the SCA103T chip.
6. The bridge dynamic deflection monitoring device of claim 5, wherein the passive filter circuit comprises: the circuit comprises an OP07DP chip, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a fourth capacitor and a sixth capacitor;
the fourth resistor and the fifth resistor are connected with the OP07DP chip, the fourth capacitor, the sixth capacitor and the seventh resistor form a closed loop, one end of the seventh resistor is further connected with the sixth resistor, the other end of the seventh resistor is connected with the OP07DP chip, and the fourth capacitor and the sixth capacitor are also grounded.
7. The bridge dynamic deflection monitoring device according to claim 1, wherein the data processing terminal comprises a cloud platform and a deflection computing terminal;
one end of the cloud platform is connected with the wireless inclinometer, and the other end of the cloud platform is connected with the deflection calculation terminal;
the cloud platform is used for receiving the inclination angle data collected by the wireless inclinometer and transmitting the data to the deflection calculation terminal, and the deflection calculation terminal calculates the dynamic deflection of the measured bridge body according to the inclination angle data.
8. The bridge dynamic deflection monitoring device of claim 2, wherein the wireless module is a 4G wireless module;
the 4G wireless module is an SIM7600CE MIS module with the Beidou information function.
9. The bridge dynamic deflection monitoring device of claim 2, wherein the data conversion module comprises an AD7606 chip, an MSP chip and a peripheral circuit;
the peripheral circuit is connected with the AD7606 chip and the MSP chip, and the AD7606 chip, the MSP chip and the peripheral circuit are matched to convert inclination angle data from analog quantity to digital quantity.
10. The bridge dynamic deflection monitoring device according to any one of claims 1-9, wherein the power supply component is a 12V lithium battery and a solar power supply system, the solar power supply system charges the 12V lithium battery, and the 12V lithium battery provides power supply for the wireless inclinometer.
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| CN202021620859.XU CN212721971U (en) | 2020-08-06 | 2020-08-06 | Bridge dynamic deflection monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115164843A (en) * | 2022-09-08 | 2022-10-11 | 深圳市城市交通规划设计研究中心股份有限公司 | Bridge inclination angle measuring device, bridge deflection measuring method and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115164843A (en) * | 2022-09-08 | 2022-10-11 | 深圳市城市交通规划设计研究中心股份有限公司 | Bridge inclination angle measuring device, bridge deflection measuring method and device |
| CN115164843B (en) * | 2022-09-08 | 2023-02-14 | 深圳市城市交通规划设计研究中心股份有限公司 | Bridge inclination angle measuring device, bridge deflection measuring method and device |
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