CN110940447A - Monitoring system of wireless excavation supporting atress - Google Patents
Monitoring system of wireless excavation supporting atress Download PDFInfo
- Publication number
- CN110940447A CN110940447A CN201911260409.6A CN201911260409A CN110940447A CN 110940447 A CN110940447 A CN 110940447A CN 201911260409 A CN201911260409 A CN 201911260409A CN 110940447 A CN110940447 A CN 110940447A
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- stress
- circuit board
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention relates to the field of foundation pit support stress monitoring, in particular to a wireless foundation pit support stress monitoring system, which comprises: the atress monitoring devices sets up in the foundation ditch, includes: the electromagnetic coil is spirally laid in the foundation pit; the steel wire is arranged in the electromagnetic coil; the circuit board is arranged on one side of the electromagnetic coil, the battery is electrically connected with the circuit board, the antenna is electrically connected with the circuit board through a cable, and the circuit board sends pressure data borne by the steel wire through the antenna; the monitoring host is electrically connected with the signal receiver to receive the pressure data and process the pressure data to output a processing result. Has the advantages that: install atress monitoring devices in the end of strutting, be in on the contact point of strutting and foundation ditch, can directly reflect the atress situation of foundation ditch, through wireless transmission pressure data to monitoring host computer, reflect the atress situation of foundation ditch in real time, through the safe situation that reachs whole foundation ditch to the processing and the analysis of a plurality of atress monitoring devices's pressure data, have safe effectual practicality.
Description
Technical Field
The invention relates to the field of foundation pit support stress monitoring, in particular to a wireless foundation pit support stress monitoring system.
Background
The foundation pit is a soil pit excavated at a foundation design position according to the base elevation and the base plane size, the foundation pit is an unavoidable form in engineering construction, particularly civil construction, and foundation pit support is a supporting, reinforcing and protecting measure adopted for the side wall of the foundation pit and the surrounding environment in order to ensure the safety of underground structure construction and the surrounding environment of the foundation pit.
At present, in the prior art, a monitoring hole is excavated at the periphery of a foundation pit, a monitoring unit is used for regularly installing a monitoring device in the monitoring hole, then the pressure borne by the monitoring hole is regularly measured, and the pressure is recorded and counted to judge the safety of the foundation pit.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a wireless foundation pit supporting stress monitoring system, which has the following specific technical scheme:
the invention relates to a wireless monitoring system for foundation pit supporting stress, wherein the monitoring system comprises:
a atress monitoring devices, atress monitoring devices sets up in the foundation ditch, atress monitoring devices includes:
the electromagnetic coil is spirally laid in the foundation pit;
the steel wire is arranged in the electromagnetic coil;
the circuit board is arranged on one side of the electromagnetic coil and is respectively and electrically connected with the electromagnetic coil and the steel wire;
the battery is electrically connected with the circuit board and provides power for the circuit board;
the antenna is electrically connected with the circuit board through a cable, and the circuit board sends pressure data borne by the steel wire through the antenna;
a signal receiver for receiving the pressure data transmitted by the antenna;
and the monitoring host is electrically connected with the signal receiver so as to receive the pressure data and process the pressure data so as to output a processing result.
Preferably, at least one stress monitoring device is arranged and is respectively arranged in the foundation pit.
Preferably, the signal receiver is a radio frequency antenna or a 4G antenna, and the radio frequency antenna or the 4G antenna is electrically connected to the monitoring host respectively.
Preferably, the monitoring system further comprises: and the server is electrically connected with the monitoring host computer and is used for storing and sharing the pressure data.
Preferably, the monitoring system further comprises: and the display screen is electrically connected with the monitoring host machine and is used for displaying the pressure data.
A monitoring method for wireless foundation pit support stress is characterized in that the monitoring method is applied to a monitoring system, the monitoring system is provided with at least one stress monitoring device, an antenna, a signal receiver and a monitoring host which are respectively connected with the stress monitoring device, the stress monitoring device is provided with a steel wire, an electromagnetic coil and a circuit board, and the monitoring method specifically comprises the following steps:
a step S1 of energizing the electromagnetic coil with current using the circuit board so that the electromagnetic coil generates an electromagnetic field;
step S2, the circuit board is adopted to connect alternating current to the steel wire, and the steel wire generates vibration under the electromagnetic field;
step S3, detecting the vibration frequency of the steel wire by using the circuit board;
step S4, converting the vibration frequency of the steel wire by adopting a conversion formula so as to obtain pressure data borne by the steel wire through conversion treatment;
step S5, the antenna is used to transmit the pressure data to the signal receiver, and the monitoring host receives the pressure data through the signal receiver and processes the pressure data to output a processing result.
Preferably, after step S5, the monitoring host sends the pressure data to a server for storage and sharing.
Preferably, after the step S5, a display screen is provided for displaying the pressure data.
Preferably, in the steps S1 and S2, a battery is provided to supply power to the circuit board.
Preferably, in step S4, the conversion formula is represented by the following formula:
wherein the content of the first and second substances,
l is used to indicate the length of the steel wire;
f is used for representing the vibration frequency of the steel wire;
p is used to represent the pressure to which the wire is subjected, k, P are used to represent constants, respectively.
The invention has the beneficial effects that: install atress monitoring devices in the end of strutting, be in on the contact point of strutting and foundation ditch, can directly reflect the atress situation of foundation ditch, through wireless transmission pressure data to monitoring host computer, reflect the atress situation of foundation ditch in real time, through the safe situation that reachs whole foundation ditch to the processing and the analysis of a plurality of atress monitoring devices's pressure data, have safe effectual practicality.
Drawings
FIG. 1 is an overall schematic view of a stress monitoring device of a wireless foundation pit support stress monitoring system according to the invention;
FIG. 2 is a schematic connection diagram of a monitoring host, a display screen and a signal receiver of the wireless foundation pit supporting stress monitoring system of the invention;
FIG. 3 is a schematic diagram of an internal structure of a stress monitoring device of the wireless foundation pit support stress monitoring system according to the invention;
FIG. 4 is a flowchart of steps of a method for monitoring stress of a wireless foundation pit support according to the present invention;
the drawings in the specification are numbered:
a stress monitoring device 1; an electromagnetic coil 11; a steel wire 12; a circuit board 13; a battery 14; an antenna 2; a cable 3; a signal receiver 4; a radio frequency antenna 41; a 4G antenna 42; a monitoring host 5; a display screen 6.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Aiming at the defects in the prior art, the invention provides a wireless foundation pit supporting stress monitoring system, which has the following specific technical scheme:
the invention relates to a wireless monitoring system for foundation pit supporting stress, wherein the monitoring system comprises:
a atress monitoring devices 1, atress monitoring devices 1 sets up in the foundation ditch, and atress monitoring devices 1 includes:
the electromagnetic coil 11 is spirally laid in the foundation pit;
a steel wire 12, the steel wire 12 is arranged in the electromagnetic coil 11;
the circuit board 13 is arranged on one side of the electromagnetic coil 11, and is respectively and electrically connected with the electromagnetic coil 11 and the steel wire 12;
a battery 14, the battery 14 is electrically connected with the circuit board 13 and provides power for the circuit board 13;
the antenna 2 is electrically connected with the circuit board 13 through a cable 3, and the circuit board 13 sends pressure data borne by the steel wire 12 through the antenna 2;
a signal receiver 4, the signal receiver 4 is used for receiving the pressure data sent by the antenna 2;
and the monitoring host 5 is electrically connected with the signal receiver 4 to receive the pressure data and process the pressure data to output a processing result.
Through the technical scheme of the monitoring system for the stress of the wireless foundation pit support, as shown in fig. 1 and fig. 2, the monitoring system is composed of a monitoring host 5 and a plurality of stress monitoring devices 1, the stress monitoring devices 1 are installed at the tail ends of the support and are positioned on the contact points of the support and the foundation pit, the pressure condition of the most edge of the foundation pit can be reflected most directly, the pressure data is uploaded to the receiving monitoring host 5 in a wireless communication mode, the stress condition of the foundation pit can be reflected in real time, and the system can combine, compare and analyze the stress condition of the whole foundation pit, so that the safety condition of the whole foundation pit is obtained.
Furthermore, because the pressure born by the foundation pit is very large and exceeds the measuring range of a common strain type pressure sensor, and if a special pressure sensor is needed, the cost is very high, the stress monitoring device 1 in the invention adopts another method to calculate the pressure, as shown in figure 3, the stress monitoring device 1 is internally provided with an elastic steel wire 12 and an electromagnetic coil 11, when the foundation pit is changed, the pressure on the stress monitoring device 1 can be changed, because a steel barrel is arranged outside the electromagnetic coil 11 in the stress monitoring device 1, the material with the maximum elastic variable is adopted, the length variable is very small (can be ignored compared with concrete), the assumed to be changed is only the pressure applied to two ends of the stress monitoring device 1, the steel wire 12 and the electromagnetic coil 11 are supplied with current during measurement, the steel wire 12 can start to vibrate under the action of the electromagnetic field generated by the electromagnetic coil 11, the circuit board 13 collects the vibration frequency of the steel wire 12 and records it.
Because the frequency of the steel wire 12 is related to the pulling force received at the two ends and the length thereof, the pressure received by the stress monitoring device 1 can be known to be in direct proportion to the square of the frequency according to a conversion formula, and therefore, the pressure received by the stress monitoring device 1 can be calculated by acquiring the frequency of the steel wire 12 in the stress monitoring device 1.
As shown in fig. 3, the stress monitoring device 1 is composed of a steel wire 12, an electromagnetic coil 11, a circuit board 13 and a battery 14, wherein the circuit board 13 mainly provides alternating current and frequency acquisition, conversion among three parameters of pressure, length and frequency, and uploads the pressure data to the monitoring host 5 in a wireless communication mode after the conversion; the battery 14 mainly supplies power to the circuit board 13, and since the foundation pit is maintained for at least half a year, the part can be separated as a separate module, and the user can freely replace the module.
The monitoring host 5 is used for receiving the pressure data uploaded by each stress monitoring device 1, issuing configuration parameters for setting the uploading period, the pressure data acquisition period and the like of each stress monitoring device 1, not only can receive the pressure data within the range of 2 kilometers through wireless communication, but also can orderly receive thousands of pressure data within 1 minute, under the condition, the pressure data can not be lost due to the congestion of the pressure data, the monitoring host 5 also has a human-computer interface, can display the pressure data according to the suggestion of a main package company, can lead the pressure data out to a display screen 6 of a computer through a USB for displaying, reserves the pressure data to be uploaded to a server through a mobile network, and obtains the safety condition of the whole foundation pit by processing and analyzing the pressure data provided by a plurality of stress monitoring devices 1, the method has safe and effective practicability, and improves the accuracy of pressure data.
In a preferred embodiment, at least one stress monitoring device 1 is arranged in the foundation pit.
In this embodiment, as shown in fig. 1, the safety condition of the whole foundation pit is obtained by processing and analyzing the pressure data provided by the plurality of stress monitoring devices 1, so that the safety and effectiveness are achieved, and the accuracy of the pressure data is improved.
In a preferred embodiment, the signal receiver 4 is an rf antenna 41 or a 4G antenna 42, and the rf antenna 41 or the 4G antenna 42 is electrically connected to the monitoring host 5 respectively.
In this embodiment, as shown in fig. 2, the signal receiver 5 includes a radio frequency antenna 41 and a 4G antenna 42 for receiving the pressure data transmitted by the antenna 2 in the stress monitoring apparatus 1, so that the pressure data can be transmitted in real time.
In a preferred embodiment, the monitoring system further comprises: and the server is electrically connected with the monitoring host 5 and is used for storing and sharing pressure data.
In this embodiment, the system further comprises a server electrically connected to the monitoring host 5 for storing and sharing the pressure data so that the pressure data can be analyzed at different times.
In a preferred embodiment, the monitoring system further comprises: and the display screen 6 is electrically connected with the monitoring host 5 and is used for displaying pressure data.
In this embodiment, as shown in fig. 2, the display screen 6 is electrically connected to the monitoring host 5 to display the pressure data, which can be displayed in real time.
A monitoring method of wireless foundation pit supporting stress is applied to a monitoring system, the monitoring system provides at least one stress monitoring device 1, an antenna 2, a signal receiver 4 and a monitoring host 5 which are respectively connected with the stress monitoring device 1, the stress monitoring device 1 provides a steel wire 12, an electromagnetic coil 11 and a circuit board 13, and the monitoring method specifically comprises the following steps:
step S1, energizing the electromagnetic coil 11 with current using the circuit board 13 so that the electromagnetic coil 11 generates an electromagnetic field;
step S2, the circuit board 13 is adopted to connect alternating current to the steel wire 12, and the steel wire 12 generates vibration under the electromagnetic field;
step S3, detecting the vibration frequency of the steel wire 12 using the circuit board 13;
step S4, converting the vibration frequency of the steel wire 12 by using a conversion formula so as to obtain pressure data of the steel wire 12 through conversion processing;
step S5, the antenna 2 is used to transmit the pressure data to the signal receiver 4, and the monitoring host 5 receives the pressure data through the signal receiver 4 and processes the pressure data to output a processing result.
In the method for monitoring the stress of the wireless foundation pit support, as shown in fig. 4, firstly, a stress monitoring device 1 is provided, wherein the stress monitoring device 1 comprises a steel wire 12, an electromagnetic coil 11, a circuit board 13 and a battery 14; the steel wire 12, an electromagnetic coil 11, a circuit board 13 and a battery 14 form an electric loop, and the circuit board 13 is adopted to supply current to the electromagnetic coil 11 so that the electromagnetic coil 11 generates an electromagnetic field; the circuit board 13 is adopted to connect alternating current to the steel wire 12, and the steel wire 12 vibrates under an electromagnetic field to detect the vibration frequency of the steel wire 12;
secondly, converting the vibration frequency of the steel wire 12 by adopting a conversion formula so as to obtain pressure data borne by the steel wire 12 through conversion processing; finally, the antenna 2 is adopted to transmit the pressure data to the signal receiver 4, the monitoring host 5 receives the pressure data through the signal receiver 4, and processes the pressure data to output a processing result to be displayed in a display screen 6.
Furthermore, in the method, the stress monitoring device 1 is arranged at the tail end of the support and is positioned at the contact point of the support and the foundation pit, the stress condition of the foundation pit can be directly reflected, pressure data are wirelessly transmitted to the monitoring host 5, the stress condition of the foundation pit is reflected in real time, the safety condition of the whole foundation pit is obtained through processing and analyzing the pressure data of the multiple stress monitoring devices 1, and the method has safe and effective practicability
In a preferred embodiment, after step S5, the monitoring host 5 sends the pressure data to a server for storage and sharing.
In this embodiment, since the server is electrically connected to the monitoring host 5, after step S5, the monitoring host 5 sends the pressure data to a server for storage and sharing, which may facilitate analyzing the pressure data at different times.
In a preferred embodiment, after step S5, a display screen 6 is provided for displaying the pressure data.
In this embodiment, as shown in fig. 2, the display screen 6 is electrically connected to the monitoring host 5 to display the pressure data, which can be displayed in real time.
In a preferred embodiment, a battery 14 is provided to power the circuit board 13 in steps S1 and S2.
In this embodiment, in the step S1 and the step S2, the circuit board is powered by a battery, which has the advantages of simple structure and low cost.
In a preferred embodiment, in step S4, the conversion formula is expressed by the following formula:
wherein the content of the first and second substances,
l is used to indicate the length of the steel wire 12;
f is used to represent the vibration frequency of the wire 12;
p is used to indicate the pressure to which the wire 12 is subjected, and k, ρ are each used to indicate a constant.
The invention has the beneficial effects that: install atress monitoring devices in the end of strutting, be in on the contact point of strutting and foundation ditch, can directly reflect the atress situation of foundation ditch, through wireless transmission pressure data to monitoring host computer, reflect the atress situation of foundation ditch in real time, through the safe situation that reachs whole foundation ditch to the processing and the analysis of a plurality of atress monitoring devices's pressure data, have safe effectual practicality.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a monitoring system of wireless excavation supporting atress which characterized in that, monitoring system includes:
a atress monitoring devices, atress monitoring devices sets up in the foundation ditch, atress monitoring devices includes:
the electromagnetic coil is spirally laid in the foundation pit;
the steel wire is arranged in the electromagnetic coil;
the circuit board is arranged on one side of the electromagnetic coil and is respectively and electrically connected with the electromagnetic coil and the steel wire;
the battery is electrically connected with the circuit board and provides power for the circuit board;
the antenna is electrically connected with the circuit board through a cable, and the circuit board sends pressure data borne by the steel wire through the antenna;
a signal receiver for receiving the pressure data transmitted by the antenna;
and the monitoring host is electrically connected with the signal receiver so as to receive the pressure data and process the pressure data so as to output a processing result.
2. The system for monitoring the stress of the wireless foundation pit support according to claim 1, wherein at least one stress monitoring device is arranged in each foundation pit.
3. The system for monitoring the stress of the wireless foundation pit support according to claim 1, wherein the signal receiver is a radio frequency antenna or a 4G antenna, and the radio frequency antenna or the 4G antenna is electrically connected with the monitoring host respectively.
4. The system for monitoring the stress of the wireless foundation pit support according to claim 1, wherein the system for monitoring further comprises: and the server is electrically connected with the monitoring host computer and is used for storing and sharing the pressure data.
5. The system for monitoring the stress of the wireless foundation pit support according to claim 1, wherein the system for monitoring further comprises: and the display screen is electrically connected with the monitoring host machine and is used for displaying the pressure data.
6. A monitoring method for wireless foundation pit support stress is characterized in that the monitoring method is applied to a monitoring system, the monitoring system is provided with at least one stress monitoring device, an antenna, a signal receiver and a monitoring host which are respectively connected with the stress monitoring device, the stress monitoring device is provided with a steel wire, an electromagnetic coil and a circuit board, and the monitoring method specifically comprises the following steps:
a step S1 of energizing the electromagnetic coil with current using the circuit board so that the electromagnetic coil generates an electromagnetic field;
step S2, the circuit board is adopted to connect alternating current to the steel wire, and the steel wire generates vibration under the electromagnetic field;
step S3, detecting the vibration frequency of the steel wire by using the circuit board;
step S4, converting the vibration frequency of the steel wire by adopting a conversion formula so as to obtain pressure data borne by the steel wire through conversion treatment;
step S5, the antenna is used to transmit the pressure data to the signal receiver, and the monitoring host receives the pressure data through the signal receiver and processes the pressure data to output a processing result.
7. The method for monitoring the stress of the wireless foundation support according to claim 6, wherein after the step S5, the monitoring host sends the pressure data to a server for storage and sharing.
8. The method for monitoring the stress of the wireless foundation pit support according to claim 6, wherein after the step S5, a display screen is provided for displaying the pressure data.
9. The method for monitoring the stress of the wireless foundation support according to claim 6, wherein in the step S1 and the step S2, a battery is provided to supply power to the circuit board.
10. The method for monitoring the stress of the wireless foundation pit support according to claim 6, wherein in the step S4, the conversion formula is represented by the following formula:
wherein the content of the first and second substances,
l is used to indicate the length of the steel wire;
f is used for representing the vibration frequency of the steel wire;
p is used to represent the pressure to which the wire is subjected, k, P are used to represent constants, respectively.
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| CN201911260409.6A CN110940447A (en) | 2019-12-10 | 2019-12-10 | Monitoring system of wireless excavation supporting atress |
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Application publication date: 20200331 |