Monitoring device for health of large-span building structure and Internet of Things system

Abstract

The invention relates to building structure monitoring, in particular to a monitoring device for health of a large-span building structure and an Internet of Things system. Which comprises an unmanned aerial vehicle and a monitoring server, and is characterized by further comprising a passive sensor and a reading transmission module, and the passive sensor is used for collecting state information of a building structure and wirelessly uploading the state information to the reading transmission module; the reading transmission module wirelessly uploads the state information of the building structure to the monitoring server. According to the invention, the RFID is combined with the sensor, so that the wiring work is omitted, and the workload of implementation and maintenance is greatly reduced; data are obtained through automatic cruise of the unmanned aerial vehicle, labor is saved, and punctual data are obtained; the Internet of Things is further wireless, the sensor at the tail end supplies power and obtains data in an RFID wireless mode, the most tedious wiring work is omitted, and arrangement and compensation of the Internet of Things sensors are facilitated.

Description

Technical Field

[0001] The present invention relates to building structure monitoring, and in particular to a monitoring device and an Internet of Things system for monitoring the health of a large-span building structure. Background Art

[0002] At present, in order to obtain unique appearance effects, some stadiums and public buildings often adopt some novel architectural forms to achieve unique design intentions. Some structural designs have large spans and are prone to deformation and displacement. In order to ensure structural safety, structural health monitoring is the key. With the promotion of structural health monitoring technology, online real-time sensor deployment is troublesome, and the implementation and maintenance costs are high. For this reason, the key points of the structure are analyzed and the deployment of sensors is minimized, which leads to insufficient monitoring data and an inability to fully understand the working state of the structure. Summary of the invention

[0003] The present invention aims to solve the above-mentioned technical problems, thereby providing a monitoring device for the health of building structures and an Internet of Things system to accurately and reliably monitor the status information of the building structures.

[0004] The present invention solves the technical problem and adopts the following technical solution: A monitoring device for the health of a large-span building structure includes a drone, a monitoring server, a passive sensor, and a reading and transmission module. The passive sensor is used to collect the state information of the building structure and wirelessly upload it to the reading and transmission module; The reading and transmitting module wirelessly uploads the status information of the building structure to the monitoring server.

[0005] An Internet of Things system for long-span building structure health monitoring, comprising the monitoring device as claimed in claim 1.

[0006] Further, the optimization scheme of the present invention is: The passive sensor includes an RFID tag analog-to-digital acquisition module and a sensor module. The sensor module senses state information of the building structure, and the sensor module communicates with the RFID tag analog-to-digital acquisition module.

[0007] The reading and transmission module includes a single-chip microcomputer, a WIFI module and an RFID reading module. The RFID reading module reads the information of the RFID tag analog-to-digital acquisition module and communicates with the single-chip microcomputer. The single-chip microcomputer communicates with the monitoring server through the WIFI module.

[0008] The passive sensor is mounted on the building structure.

[0009] The reading transmission module is mounted on a drone, and the drone cruises along a set route and approaches the passive sensor.

[0010] The model of the single chip microcomputer is RISC-V.

[0011] Compared with the prior art, the present invention using the above technical solution has the following beneficial effects: 1) RFID combined with sensors eliminates the need for wiring, greatly reducing the workload of implementation and maintenance; 2) Data is acquired by automatic cruising of drones, which saves manpower and obtains timely data; 3) Make the IoT network further wireless. The sensors at the end are powered and obtain data through RFID wireless methods, which omits the most tedious wiring work and facilitates the deployment and follow-up of IoT sensors. 4) Use drones to mount reading and transmission modules, automatically patrol along designated routes, wirelessly read sensor data, and wirelessly transmit it to the monitoring server, saving manpower while also reducing accessibility issues; 5) The RFID band uses UHF ultra-high frequency, the data collection and reading distance can reach several meters, and it has a certain penetration ability, which is convenient for drones to fly and avoid indoors; 6) The reading and transmission module is independent of the UAV platform, and the UAV platform can be easily replaced as needed; 7) The reading and transmission module is connected to the Internet of Things through WIFI and connected to the monitoring server, making it convenient to use the existing wireless network facilities; 8) The reading transmission module uses common protocols such as http and MQ to communicate with the monitoring server, which can make full use of the existing monitoring system resources; 9) It is easy to deploy more sensors on the building structure to obtain sufficiently comprehensive data, and sensor redundancy can be achieved to verify data, withstand sensor loss, and obtain more accurate and reliable results. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram of drone inspection according to an embodiment of the present invention Figure 2 A schematic diagram of a passive sensor according to an embodiment of the present invention; Figure 3 Schematic diagram of a read transmission module according to an embodiment of the present invention Figure 4 Schematic diagram of a flying robot module according to an embodiment of the present invention.

[0013] In the figure: passive sensor 1; RFID tag analog-to-digital acquisition module 101; sensor module 102; reading and transmission module 2; single-chip computer 201; WIFI module 202; RFID reading module 203; drone 3; WIFI base station 4; Internet of Things network 5; monitoring server 6; building structure 7. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0015] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0016] See also Figure 1-Figure 4 This embodiment provides a monitoring device for the health of a large-span building structure, which is mainly composed of a passive sensor 1, a reading and transmission module 2, a drone 3 and a monitoring server 6. A plurality of passive sensors 1 are installed on the building structure 7. The passive sensor is composed of an RFID tag analog-to-digital acquisition module 101 and a sensor module 102. The sensor module 102 senses the state information of the building structure, and the sensor module 102 communicates with the RFID tag analog-to-digital acquisition module 101. The sensor module 102 is a MEMS micro sensor. The milliampere current generated by the UHF ultra-high frequency radio wave of the RFID tag analog-to-digital acquisition module 101 is sufficient to drive the MEMS micro sensor. The RFID tag analog-to-digital acquisition module 101 and the sensor module 102 are integrated into a passive sensor for sensing the tilt angle.

[0017] The reading and transmission module 2 is composed of a single-chip microcomputer 201, a WIFI module 202 and an RFID reading module 203. The WIFI module 202 and the RFID reading module 203 are installed on the single-chip microcomputer 201. The model of the single-chip microcomputer 201 is RISC-V. The single-chip microcomputer 201 controls and drives the RFID reading module 203 to work, read the data of the passive sensor 1, and connect the monitoring server 6 through the WIFI base station 4 and the Internet of Things 5 ​​through the onboard WIFI module 202, and submit the data to the monitoring server 6. The single-chip microcomputer 201 and the RFID reading module 203 are powered by a lithium battery and can work continuously for at least 15 minutes.

[0018] The reading and transmission module 1 is mounted on the drone 3 to form a data collection flying robot, which works independently to complete the tasks of fixed-point cruising and data collection. There are usually several small compartments without roofs in a large-span and large-space building. The data collection flying robot can be parked in them for charging and maintenance. When working, it takes off directly from the small compartment without roofs, automatically inspects according to the set route, and finally flies back to the small compartment without roofs.

[0019] During monitoring, the data acquisition flying robot flies close to the passive sensor 1 at the designated position, reads the data of the passive sensor 1, and connects to the WIFI base station 4 at the same time, and transmits the sensed data back to the monitoring server 6 via the Internet of Things network 5. The monitoring server 6 analyzes and processes the data of the passive sensor 1, and interacts with the structural technicians through the Web interface to finally determine the safety status of the large-span building structure.

[0020] An Internet of Things system for monitoring the health of large-span building structures comprises the above-mentioned monitoring device.

[0021] The present invention is based on the building structure health monitoring Internet of Things system that integrates RFID and drones, which is used to collect health monitoring data of large-span and large-space building structures. Passive sensors are used to sense the structural health, and flying robots approach to collect passive sensor data, and the monitoring data is transmitted back through the wireless + wired monitoring Internet of Things network. The monitoring software system collects, stores, manages, and analyzes the monitoring data, generates abnormal warning information, and visually displays the monitoring data and warning information on the WEB interface.

[0022] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A monitoring device for the health of a large-span building structure, comprising a drone and a monitoring server, characterized in that: It also includes passive sensors, reading and transmission modules, The passive sensor is used to collect the state information of the building structure and wirelessly upload it to the reading and transmission module; The reading and transmitting module wirelessly uploads the status information of the building structure to the monitoring server.

2. The monitoring device for the health of a large-span building structure according to claim 1 is characterized in that: The passive sensor includes an RFID tag analog-to-digital acquisition module and a sensor module. The sensor module senses state information of the building structure, and the sensor module communicates with the RFID tag analog-to-digital acquisition module.

3. The monitoring device for the health of a large-span building structure according to claim 1 is characterized in that: The reading and transmission module includes a single-chip microcomputer, a WIFI module and an RFID reading module. The RFID reading module reads the information of the RFID tag analog-to-digital acquisition module and communicates with the single-chip microcomputer. The single-chip microcomputer communicates with the monitoring server through the WIFI module.

4. The monitoring device for the health of a large-span building structure according to claim 1 is characterized in that: The passive sensor is mounted on the building structure.

5. The monitoring device for the health of a large-span building structure according to claim 1 is characterized in that: The reading transmission module is mounted on a drone, and the drone cruises along a set route and approaches the passive sensor.

6. The monitoring device for the health of a large-span building structure according to claim 1 is characterized in that: The model of the single chip microcomputer is RISC-V.

7. An Internet of Things system for long-span building structure health monitoring, characterized in that: Comprising the monitoring device as claimed in claim 1.

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