CN116339224A - Jacking operation monitoring system and control method for single-pier bridge reinforcing device - Google Patents
Jacking operation monitoring system and control method for single-pier bridge reinforcing device Download PDFInfo
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Abstract
The invention discloses a lifting operation monitoring system and a lifting operation control method for a single-pier bridge reinforcing device, wherein the lifting operation can be carried by the single-pier bridge reinforcing device through a hydraulic lifting platform, the bearing data of the hydraulic lifting platform can be collected through a pressure sensor, the displacement data of the hydraulic lifting platform can be detected through a displacement sensor, a corresponding control instruction can be generated according to the displacement data and the bearing data through a monitoring host to a PLC (programmable logic controller), and the hydraulic output of a hydraulic oil pump can be controlled through the PLC so as to realize the purpose of finely controlling and adjusting the working state of the hydraulic lifting platform. The invention can sense the change of displacement and stress in real time in the jacking operation process of the single-pier bridge reinforcing device, and feedback control the refined output of the hydraulic oil pump according to the change of the displacement and the stress, thereby ensuring the safety and the accuracy of the jacking operation and improving the controllability of the jacking operation.
Description
Technical Field
The invention belongs to the technical field of engineering construction management, and particularly relates to a jacking operation monitoring system and a management and control method of a single-pier bridge reinforcing device.
Background
In the engineering of the established bridge, in order to perform anti-overturning reinforcement transformation on the single-column piers, a steel cap beam is additionally arranged on the top of the single-column piers of the established bridge. The steel bent cap has large size and heavy weight, mechanical equipment is limited under the existing bridge, the difficulty of installing the steel bent cap is very high, the safety risk of building a scaffold on the outer side is high, and the construction period is long. The single steel bent cap added during the anti-overturning transformation of the single pier weighs more than 5 tons, and the lifting equipment cannot be used under the current bridge because of the pier column height in the ramp area. By utilizing the pulley lifting scheme, difficulty exists in mounting, positioning and positioning the steel bent cap, the hanging point is difficult to solve, and meanwhile, an operation scaffold platform needs to be erected on the periphery of the pier stud, so that the workload is high and the safety risk is high. The lifting platform lifting mode is adopted to facilitate construction, but real-time systematic, accurate and safe operation monitoring is still difficult to perform when the steel bent cap is lifted, so that an effective lifting operation monitoring means is needed.
Disclosure of Invention
The invention aims to provide a jacking operation monitoring system and a control method for a single pier bridge reinforcing device, which are used for solving the problems in the prior art.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
in a first aspect, a monitoring system for jacking operation of a single-column pier bridge reinforcing device is provided, which comprises a hydraulic lifting platform, a hydraulic oil pump, a displacement sensor, a pressure sensor, a PLC controller and a monitoring host, wherein:
the hydraulic lifting platform is used for jacking the single-pier bridge reinforcing device, and a hydraulic oil cylinder of the hydraulic lifting platform is in oil path connection with a hydraulic oil pump;
the displacement sensor is arranged on the hydraulic lifting platform and is used for detecting and generating displacement data during lifting operation of the hydraulic lifting platform and transmitting the displacement data to the PLC;
the pressure sensor is arranged on the hydraulic lifting platform and is used for detecting and generating bearing data of the hydraulic lifting platform and transmitting the bearing data to the PLC;
the PLC is used for transmitting the displacement data and the bearing data to the monitoring host, receiving a control instruction of the monitoring host and controlling the hydraulic output of the hydraulic oil pump according to the control instruction;
the hydraulic oil pump is used for receiving the control of the PLC to carry out corresponding hydraulic output on the hydraulic oil cylinder of the hydraulic lifting platform so as to control the working state of the hydraulic lifting platform;
the monitoring host is used for receiving the displacement data and the bearing data, generating corresponding control instructions according to the displacement data and the bearing data, and transmitting the control instructions to the PLC.
In one possible design, the displacement sensor is a laser displacement sensor, the pressure sensor is a piezoelectric pressure sensor, two hydraulic lifting platforms are arranged and are respectively arranged on two sides of a hoop steel frame platform erected on the single-column pier bridge and used for synchronously jacking or independently jacking the single-column pier bridge reinforcing device.
In one possible design, the hydraulic oil pump includes an emergency drop valve for manually controlling hydraulic oil level drop.
In one possible design, the system further comprises a camera in signal connection with the monitoring host, wherein the camera is used for collecting operation site images and transmitting the collected operation site images to the monitoring host, and the monitoring host is further used for carrying out image processing on the operation site images, judging the number of site operators and whether each operator wears safety helmets, and outputting a person number identification result and a safety helmet wearing identification result.
In one possible design, the job site image is time stamped, and the monitoring host is further configured to determine the total time of the output job based on the time stamp of the job site image.
In one possible design, the monitoring host is further configured to determine an illumination intensity of the output job site based on the job site image.
In one possible design, the system further includes a positioning module for acquiring positioning information of the operation site and transmitting the positioning information to the monitoring host, and a wireless network module for acquiring weather information of the operation site on line and transmitting the weather information to the monitoring host.
In one possible design, the system further includes a voltage sensor for collecting voltage data of the PLC controller and transmitting the voltage data to the monitoring host, and a temperature sensor for detecting and generating temperature data of the hydraulic lift platform hydraulic ram and transmitting the temperature data to the monitoring host.
In a second aspect, a method for monitoring jacking operation of a single-pier bridge reinforcing device is provided, including:
the method comprises the steps of placing a single-pier bridge reinforcing device on a hydraulic lifting platform, and detecting and generating bearing data of the hydraulic lifting platform through a pressure sensor;
the pressure sensor transmits the bearing data to the PLC controller, and the PLC controller transmits the bearing data to the monitoring host;
when the bearing data exceeds a set threshold value, the monitoring host sends a starting control instruction to the PLC controller;
the PLC controller performs hydraulic output starting control of the hydraulic oil pump according to the starting control instruction so as to drive and control the hydraulic lifting platform to perform lifting operation;
in the lifting operation process of the hydraulic lifting platform, displacement data during lifting operation of the hydraulic lifting platform are detected and generated through a displacement sensor;
the displacement sensor transmits displacement data to the PLC controller, and the PLC controller transmits the displacement data to the monitoring host;
the monitoring host sends a process control instruction to the PLC according to the displacement data;
and the PLC performs hydraulic output process control of the hydraulic oil pump according to the process control instruction so as to adjust the working state of the hydraulic lifting platform.
In a third aspect, a method for monitoring a jacking operation of a single-pier bridge reinforcing device is provided, including:
acquiring an operation site image through a camera, and transmitting the operation site image to a monitoring host;
the monitoring host computer guides the operation site image into a preset yolov4 model for operator detection, identifies each operator in the image and outputs the detected number of operators;
the monitoring host computer guides the identified operator image into a preset ResNet network model, identifies and judges whether each operator wears the safety helmet, and outputs the safety helmet wearing identification result of each operator.
The beneficial effects are that: according to the hydraulic lifting platform, the hydraulic lifting platform can bear the single-pier bridge reinforcing device for lifting operation, single-side lifting control can be performed through arranging the double-side hydraulic lifting platforms, synchronous lifting control can also be performed, the bearing data of the hydraulic lifting platform can be collected through the pressure sensor, the displacement data of the hydraulic lifting platform can be detected through the displacement sensor, a corresponding control instruction can be generated according to the displacement data and the bearing data through the monitoring host computer to a PLC controller, and the hydraulic output of the hydraulic oil pump can be controlled through the PLC controller, so that the purpose of finely controlling and adjusting the working state of the hydraulic lifting platform is achieved. The operation site images can be acquired through the camera so as to judge the number of the operation personnel on the supervision site and whether each operation personnel wears the safety helmet or not through the processing and identification of the operation site images by the monitoring host. The invention can carry out jacking operation on the single-column pier bridge reinforcing device, senses the changes of displacement and stress in real time in the jacking operation process, and feeds back and controls the refined output of the hydraulic oil pump according to the changes of the displacement and the stress, thereby ensuring the safety and the accuracy of the single-column pier bridge reinforcing device in the jacking operation process and greatly improving the jacking operation controllability of the single-column pier bridge reinforcing device.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a hydraulic oil pump and a hydraulic lifting platform according to an embodiment of the present invention;
FIG. 3 is a schematic installation diagram of a hoop steel frame platform and a hydraulic lifting platform in an embodiment of the invention;
FIG. 4 is a schematic diagram of a triangulation method of a laser displacement sensor according to an embodiment of the present invention.
Detailed Description
It should be noted that the description of these examples is for aiding in understanding the present invention, but is not intended to limit the present invention. Specific structural and functional details disclosed herein are merely representative of example embodiments of the invention. This invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
It will be appreciated that the term "coupled" is to be interpreted broadly, and may be a fixed connection, a removable connection, or an integral connection, for example, unless explicitly stated and limited otherwise; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in the embodiments can be understood by those of ordinary skill in the art according to the specific circumstances.
In the following description, specific details are provided to provide a thorough understanding of example embodiments. However, it will be understood by those of ordinary skill in the art that the example embodiments may be practiced without these specific details. For example, a system may be shown in block diagrams in order to avoid obscuring the examples with unnecessary detail. In other embodiments, well-known processes, structures, and techniques may be shown without unnecessary detail in order to avoid obscuring the embodiments.
Example 1:
the embodiment provides a single-column pier bridge reinforcing apparatus jacking operation monitored control system, as shown in fig. 1 to 2, including hydraulic lifting platform, hydraulic oil pump, displacement sensor, pressure sensor, PLC controller and monitoring host computer, wherein:
the hydraulic lifting platform is used for jacking the single-pier bridge reinforcing device, and a hydraulic oil cylinder of the hydraulic lifting platform is in oil path connection with a hydraulic oil pump;
the displacement sensor is arranged on the hydraulic lifting platform and is used for detecting and generating displacement data during lifting operation of the hydraulic lifting platform and transmitting the displacement data to the PLC;
the pressure sensor is arranged on the hydraulic lifting platform and is used for detecting and generating bearing data of the hydraulic lifting platform and transmitting the bearing data to the PLC;
the PLC is used for transmitting the displacement data and the bearing data to the monitoring host, receiving a control instruction of the monitoring host and controlling the hydraulic output of the hydraulic oil pump according to the control instruction;
the hydraulic oil pump is used for receiving the control of the PLC to carry out corresponding hydraulic output on the hydraulic oil cylinder of the hydraulic lifting platform so as to control the working state of the hydraulic lifting platform;
the monitoring host is used for receiving the displacement data and the bearing data, generating corresponding control instructions according to the displacement data and the bearing data, and transmitting the control instructions to the PLC.
In specific implementation, as shown in fig. 3, two hydraulic lifting platforms are provided, and the two hydraulic lifting platforms are respectively installed on two sides of the hoop steel frame platform erected on the single-pier bridge and are used for synchronously or independently jacking the single-pier bridge reinforcing device. The anchor ear steel frame platform comprises two anchor ear steel frames and bolts which are bilaterally symmetrical, wherein the two anchor ear steel frames are enmeshed on the single pier of the bridge and are contacted with the single pier of the bridge through rubber gaskets. The displacement sensor adopts a laser displacement sensor and is arranged at the top of the hydraulic lifting platform. The left hydraulic lifting platform and the right hydraulic lifting platform are respectively provided with one, the laser displacement sensor is connected with the PLC, the laser displacement sensor transmits displacement data to the PLC, and the PLC can synchronously control the displacement of the left hydraulic lifting platform and the right hydraulic lifting platform and correct the deviation in time. The laser displacement sensor adopts a triangulation method, and the synchronous displacement control precision is 0.5mm.
Triangulation of laser displacement sensor as shown in fig. 4, a beam of light is emitted from a light source toThe surface of the object to be measured is observed by imaging the position of the reflected light spot in the other direction, thereby calculating the displacement of the object. Since the incident and reflected light forms a triangle, this method is called a triangulation method, and is classified into a direct type and an oblique type according to the relationship between the incident light and the normal line of the surface of the workpiece to be measured, and the present embodiment adopts the direct type as an example. Light emitted by the laser is focused by the converging lens and then vertically enters the surface of the object to be measured, and the incident light spot moves along the incident optical axis due to the movement or surface change of the object. The receiving lens receives scattered light from the incident spot and images it on the spot position ejector sensitive surface. However, since the sensor laser beam is perpendicular to the side face, only one accurate focusing position exists, and images at other positions are in different degrees of defocusing. Defocus will cause dispersion of the image point, thereby reducing the measurement accuracy of the system. To improve the accuracy, θ 1 And theta 2 The following must be satisfied:
tanθ 1 ＝Utanθ 2
wherein U is the transverse magnification. At the moment, the measured points in a certain depth of field range can be imaged on the detector in a positive focus manner, so that the precision is ensured.
If the displacement of the light spot on the imaging surface is x', the displacement of the measured surface can be obtained by using the proportional relation among the sides of the similar triangle according to the following formula:
wherein a is the distance from the intersection point of the laser beam optical axis and the receiving optical axis to the front main surface of the receiving lens, b is the distance from the rear main surface of the receiving lens to the center point of the imaging surface, θ 1 Is the included angle between the optical axis of the laser beam and the optical axis of the receiving lens, theta 2 Is the angle between the detector and the optical axis of the receiving lens.
The pressure sensor adopts a piezoelectric pressure sensor, and the top of each of the left hydraulic lifting platform and the right hydraulic lifting platform is provided with one pressure sensor. The piezoelectric pressure sensor consists of a lead, a shell, a base, a piezoelectric wafer, a pressed diaphragm and a conducting plate. When the diaphragm is subjected to a pressure P, an electric charge is generated on the piezoelectric wafer. The charge q generated on one piezoelectric plate is
q＝d 11 F＝d 11 SP
Wherein F represents a force acting on the piezoelectric sheet, d 11 Representing the piezoelectric coefficient, P representing the pressure,
s is the effective area of the diaphragm.
The input quantity of the pressure measuring sensor is pressure P, if the sensor is composed of only one piezoelectric wafer, the definition according to the sensitivity is:
charge sensitivity
Voltage sensitivity
Charge sensitivity k q ＝d 11 S
Because of
The voltage sensitivity can be expressed as +.>
U 0 Representing the output voltage of the piezoelectric sheet, C 0 The equivalent capacitance of the piezoelectric plate. The passing voltage can be reversely deduced to F through the formula, namely the gravity born by the hydraulic lifting platform.
The hydraulic oil pump comprises a precise throttle valve, an overflow valve, an electromagnetic stop valve and a hydraulic control one-way valve, and uses the high-pressure oil pump to provide pressure, and is connected with a hydraulic oil cylinder on the hydraulic lifting platform through a hydraulic oil way pipe to finish the lifting and descending operation of the hydraulic lifting platform. The hydraulic oil pump can also comprise an emergency descending valve and a built-in overflow valve, wherein the emergency descending valve is used for manually controlling the hydraulic oil level to descend, and the built-in overflow valve can prevent the system pressure from being too high during the upward movement and has an overload protection function. The PLC controller can control the hydraulic lifting platform up and down, the lifting speed and the descending speed can be adjusted, and the emergency stop function can be set so as to ensure property and personal safety to the maximum extent, and meanwhile, 24V safety control voltage is used by each operation power utilization part. The hydraulic lifting platform comprises a table top, a scissor inner supporting rod, a rectangular pipe buckle cover, a scissor outer supporting rod, a shaft pin, a hydraulic oil pipe, a hydraulic oil cylinder, a lower guide rail and a rolling wheel, wherein the table top is a pattern steel plate, the scissor supporting rod is a manganese steel rectangular pipe, the shaft pin is made of round steel, the shaft pin is subjected to thermal refining, an oil-free self-lubricating bearing is additionally arranged between the shaft pins, the hydraulic oil cylinder is provided with an explosion-proof valve, the lower guide rail is a channel steel, the rolling wheel is a nylon slider, and the hydraulic oil pipe is a double-layer steel-mesh high-pressure oil pipe. The inner and outer brackets and the shaft pins of the hydraulic lifting platform can be in a modularized design, multiple groups of brackets are overlapped according to the requirement, and the brackets are connected through the shaft pins.
Further, the system also comprises a camera which is in signal connection with the monitoring host, the camera is used for collecting the operation site images and transmitting the collected operation site images to the monitoring host, the monitoring host is also used for carrying out image processing on the operation site images, judging the number of site operators and whether each operator wears safety helmets, and outputting the number identification result and the safety helmets wearing identification result.
When the number of field operators is identified, the monitoring host can analyze the image through a yolov4 model to detect the number of the field operators, wherein the yolov4 model consists of three parts, namely a backup, a neg and a head. The backbone is CSPDarknet53 (CSP Cross Stage Partial), which is structured as shown in FIG. 1, for feature extraction; the neg consists of SPP (Spatial Pyramid Pooling block) and PANet (Path Aggregation Network) for adding receptive fields and separating out the most important features, and the PANet module can ensure that semantic features are accepted from the higher level layer and fine-grained features are accepted from the lower level layer of the transverse backbone network at the same time; head is based on anchor frame detection and detects three different sized feature maps 13x13, 26x26 and 52x52, respectively, for large to small targets where the large sized feature map is more informative and therefore the 52x52 sized feature map is used for small targets and vice versa.
When the safety helmet wearing identification of the on-site operators is carried out, the images of the operators can be classified through the ResNet network so as to detect whether the operators wear the safety helmet. In this embodiment, a res net_34 (residual network) model is adopted, after the number of layers of the convolutional neural network is deepened theoretically, the network should be able to extract more complex features, but as a result of experiments, it is found that degradation problems (increase of the number of layers of the network and increase of errors in prediction) occur in the network, and the res net model proposes a structure, and short-circuits (shortcut connection), only residual terms are learned, because residual learning is easier than original feature learning, and if the learned residual value F (x) is 0, an identity mapping is equivalent to being made.
Further, the job site image is provided with a time stamp, and the monitoring host is further used for judging the total time of the output job according to the time stamp of the job site image. The monitoring host can also judge and output the illumination intensity of the operation site according to the operation site image, namely, the pixel average value of the image is calculated through the opencv library, the illumination intensity is judged through the set threshold value, and if the illumination intensity is lower than the set threshold value, the on-site illumination lamp can be determined to be turned on.
Further, the system also comprises a positioning module and a wireless network module, wherein the positioning module is used for acquiring positioning information of the operation site and transmitting the positioning information to the monitoring host, and the wireless network module is used for acquiring weather information of the operation site on line and transmitting the weather information to the monitoring host. The positioning module can adopt a GPS positioning module or a Beidou positioning module and the like, the wireless network module can adopt a 4G communication module, and the 4G communication module refers to a basic circuit set of which hardware is loaded to a specified frequency band and software supports a standard LTE protocol.
Further, the system also comprises a voltage sensor and a temperature sensor, wherein the voltage sensor is used for collecting voltage data of the PLC controller and transmitting the voltage data to the monitoring host, and the temperature sensor is used for detecting and generating temperature data of the hydraulic cylinder of the hydraulic lifting platform and transmitting the temperature data to the monitoring host. The principle of the voltage sensor is that the primary side voltage is in the level of milliampere through an external or internal resistor, after the current passes through a plurality of turns of windings, the magnetic field generated by the primary side current is detected by a Hall element in an air gap through a magnetic ring, and corresponding electromotive force is induced, the electromotive force is fed back to a compensation coil for compensation after being regulated by a circuit, and the magnetic flux generated by the compensation coil is equal to the magnetic flux generated by the primary side current in size and opposite in direction, so that the magnetic flux is kept to be zero in the magnetic core. The Hall voltage sensor has small volume, good linearity and short response time. The temperature sensor can adopt a thermistor sensor, the thermistor is a sensitive element, the resistance value of the thermistor can be changed along with the change of temperature, and the thermistor is different from a common fixed resistor and belongs to a variable resistor, and the thermistor has the main characteristics of high sensitivity, more than ten times of the temperature coefficient of resistance than metal and wide working range.
Example 2:
the embodiment provides a method for monitoring the jacking operation of a single-column pier bridge reinforcing device, which comprises the following steps:
the method comprises the steps of placing a single-pier bridge reinforcing device on a hydraulic lifting platform, and detecting and generating bearing data of the hydraulic lifting platform through a pressure sensor;
the pressure sensor transmits the bearing data to the PLC controller, and the PLC controller transmits the bearing data to the monitoring host;
when the bearing data exceeds a set threshold value, the monitoring host sends a starting control instruction to the PLC controller;
the PLC controller performs hydraulic output starting control of the hydraulic oil pump according to the starting control instruction so as to drive and control the hydraulic lifting platform to perform lifting operation;
in the lifting operation process of the hydraulic lifting platform, displacement data during lifting operation of the hydraulic lifting platform are detected and generated through a displacement sensor;
the displacement sensor transmits displacement data to the PLC controller, and the PLC controller transmits the displacement data to the monitoring host;
the monitoring host sends a process control instruction to the PLC according to the displacement data;
and the PLC performs hydraulic output process control of the hydraulic oil pump according to the process control instruction so as to adjust the working state of the hydraulic lifting platform.
Further, the method further comprises:
acquiring an operation site image through a camera, and transmitting the operation site image to a monitoring host;
the monitoring host computer guides the operation site image into a preset yolov4 model for operator detection, identifies each operator in the image and outputs the detected number of operators;
the monitoring host computer guides the identified operator image into a preset ResNet network model, identifies and judges whether each operator wears the safety helmet, and outputs the safety helmet wearing identification result of each operator.
Example 3:
the present embodiment provides a computer device, at a hardware level, including:
the data interface is used for establishing communication data docking of the processor with other devices;
a memory for storing instructions;
and the processor is used for reading the instructions stored in the memory and executing the processing logic of the monitoring host in the embodiment 1 according to the instructions.
Optionally, the computer device further comprises an internal bus. The processor and memory and display may be interconnected by an internal bus, which may be an ISA (Industry Standard Architecture ) bus, a PCI (Peripheral Component Interconnect, peripheral component interconnect standard) bus, or an EISA (Extended Industry Standard Architecture ) bus, among others. The buses may be classified as address buses, data buses, control buses, etc.
The Memory may include, but is not limited to, random access Memory (Random Access Memory, RAM), read Only Memory (ROM), flash Memory (Flash Memory), first-in first-out Memory (First Input First Output, FIFO), and/or first-in last-out Memory (First In Last Out, FILO), etc. The processor may be a general-purpose processor including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but also microprocessors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
Example 4:
the present embodiment provides a computer readable storage medium having instructions stored thereon that, when executed on a computer, cause the computer to execute the processing logic of the monitoring host of embodiment 1. The computer readable storage medium refers to a carrier for storing data, and may include, but is not limited to, a floppy disk, an optical disk, a hard disk, a flash Memory, and/or a Memory Stick (Memory Stick), etc., where the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable system.
The present embodiment also provides a computer program product comprising instructions which, when run on a computer, cause the computer to execute the processing logic of the monitoring host of embodiment 1. Wherein the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable system.
Finally, it should be noted that: the foregoing description is only of the preferred embodiments of the invention and is not intended to limit the scope of the invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a single pier bridge reinforcing apparatus jacking operation monitored control system, its characterized in that includes hydraulic lifting platform, hydraulic oil pump, displacement sensor, pressure sensor, PLC controller and monitoring host computer, wherein:
the hydraulic lifting platform is used for jacking the single-pier bridge reinforcing device, and a hydraulic oil cylinder of the hydraulic lifting platform is in oil path connection with a hydraulic oil pump;
the displacement sensor is arranged on the hydraulic lifting platform and is used for detecting and generating displacement data during lifting operation of the hydraulic lifting platform and transmitting the displacement data to the PLC;
the pressure sensor is arranged on the hydraulic lifting platform and is used for detecting and generating bearing data of the hydraulic lifting platform and transmitting the bearing data to the PLC;
the PLC is used for transmitting the displacement data and the bearing data to the monitoring host, receiving a control instruction of the monitoring host and controlling the hydraulic output of the hydraulic oil pump according to the control instruction;
the hydraulic oil pump is used for receiving the control of the PLC to carry out corresponding hydraulic output on the hydraulic oil cylinder of the hydraulic lifting platform so as to control the working state of the hydraulic lifting platform;
the monitoring host is used for receiving the displacement data and the bearing data, generating corresponding control instructions according to the displacement data and the bearing data, and transmitting the control instructions to the PLC.
2. The jacking operation monitoring system of the single-pier bridge reinforcing device according to claim 1, wherein the displacement sensor is a laser displacement sensor, the pressure sensor is a piezoelectric pressure sensor, two hydraulic lifting platforms are arranged and are respectively arranged on two sides of a hoop steel frame platform erected on the single-pier bridge and used for synchronously jacking or independently jacking the single-pier bridge reinforcing device.
3. The system of claim 1, wherein the hydraulic oil pump comprises an emergency lowering valve for manually controlling the lowering of the hydraulic oil level.
4. The jacking operation monitoring system of the single pier bridge reinforcing device according to claim 1, further comprising a camera which is in signal connection with the monitoring host, wherein the camera is used for collecting operation site images and transmitting the collected operation site images to the monitoring host, and the monitoring host is further used for carrying out image processing on the operation site images, judging the number of site operators and whether each operator wears a safety helmet, and outputting a person number identification result and a safety helmet wearing identification result.
5. The system for monitoring the jacking operation of the single pier bridge reinforcing device according to claim 4, wherein the operation site image is provided with a time stamp, and the monitoring host is further used for judging the total output operation time according to the time stamp of the operation site image.
6. The system for monitoring the jacking operation of the single pier bridge reinforcing device according to claim 4, wherein the monitoring host is further used for judging the illumination intensity of the output operation site according to the operation site image.
7. The system for monitoring the jacking operation of the single pier bridge reinforcing device according to claim 1, further comprising a positioning module and a wireless network module, wherein the positioning module is used for acquiring positioning information of an operation site and transmitting the positioning information to a monitoring host, and the wireless network module is used for acquiring weather information of the operation site on line and transmitting the weather information to the monitoring host.
8. The system for monitoring the jacking operation of the single-pier bridge reinforcing device according to claim 1, further comprising a voltage sensor and a temperature sensor, wherein the voltage sensor is used for collecting voltage data of the PLC and transmitting the voltage data to the monitoring host, and the temperature sensor is used for detecting and generating temperature data of the hydraulic cylinder of the hydraulic lifting platform and transmitting the temperature data to the monitoring host.
9. A method for monitoring the jacking operation of a single pier bridge reinforcing device, which is applied to the management and control system of any one of claims 1 to 8, and is characterized by comprising the following steps:
the method comprises the steps of placing a single-pier bridge reinforcing device on a hydraulic lifting platform, and detecting and generating bearing data of the hydraulic lifting platform through a pressure sensor;
the pressure sensor transmits the bearing data to the PLC controller, and the PLC controller transmits the bearing data to the monitoring host;
when the bearing data exceeds a set threshold value, the monitoring host sends a starting control instruction to the PLC controller;
the PLC controller performs hydraulic output starting control of the hydraulic oil pump according to the starting control instruction so as to drive and control the hydraulic lifting platform to perform lifting operation;
in the lifting operation process of the hydraulic lifting platform, displacement data during lifting operation of the hydraulic lifting platform are detected and generated through a displacement sensor;
the displacement sensor transmits displacement data to the PLC controller, and the PLC controller transmits the displacement data to the monitoring host;
the monitoring host sends a process control instruction to the PLC according to the displacement data;
and the PLC performs hydraulic output process control of the hydraulic oil pump according to the process control instruction so as to adjust the working state of the hydraulic lifting platform.
10. The method for monitoring the jacking operation of the single-pier bridge reinforcing device, which is applied to the control system of claim 4, is characterized by comprising the following steps:
acquiring an operation site image through a camera, and transmitting the operation site image to a monitoring host;
the monitoring host computer guides the operation site image into a preset yolov4 model for operator detection, identifies each operator in the image and outputs the detected number of operators;
the monitoring host computer guides the identified operator image into a preset ResNet network model, identifies and judges whether each operator wears the safety helmet, and outputs the safety helmet wearing identification result of each operator.
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| CN202310149929.XA CN116339224A (en) | 2023-02-14 | 2023-02-14 | Jacking operation monitoring system and control method for single-pier bridge reinforcing device |
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| CN202310149929.XA CN116339224A (en) | 2023-02-14 | 2023-02-14 | Jacking operation monitoring system and control method for single-pier bridge reinforcing device |
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