CN214252948U - Intelligent structural vibration acquisition and testing equipment for non-stop modal test of bridge - Google Patents

Abstract

The utility model provides a structural vibration intelligence is adopted and is surveyed equipment for test of bridge no parking mode, equipment includes: the intelligent bridge comprises a power supply module, a sensing module, a storage module, a communication module, a GPS module and a main control chip, wherein each module is integrated on a circuit board, is arranged in a shell through the circuit board, is fixed at a measured position of a bridge floor, and is used for attaching a sensitive end of the sensing module to a contact surface of a measured object; the power supply module provides energy for the whole equipment; the sensing module is used for acquiring acceleration data; the storage module is used for storing the acquired acceleration data and sending the acceleration data to the cloud end through the communication module; the communication module adopts a 4G module, transmits the acquired data to the cloud end, and adopts a GPS module for positioning and timing; the main control chip is used for managing data acquisition, transmission and coordination of all modules; a plurality of devices form an array, the array is arranged on different positions of a bridge floor, and the time between different devices is synchronized through a GPS (global positioning system), so that the bridge modal test under the condition of no road closure and no parking is realized.

Description

Intelligent structural vibration acquisition and testing equipment for non-stop modal test of bridge

Technical Field

The application relates to monitoring (detecting) equipment applied to bridge modal testing.

Background

In maintenance of large bridge structures, periodic dynamic parameter testing (modal testing) of the upper structure is an important task for evaluating the structural shape. However, the current structure dynamic parameter testing process has the following problems:

(1) the structural dynamic test is borne by professional units, the cost is high, the implementation time interval is long, the special requirements of maintenance units on the structural state evaluation cannot be met, for example, the dynamic test frequency is gradually increased along with the increase of the service time of the bridge, or the modal test is required to be carried out immediately after important structural events such as typhoon and the like, and the modal test cannot be implemented autonomously in the traditional maintenance work;

(2) the traditional structural dynamic test system needs to arrange a large number of data lines and cables, so that the traffic closure of a bridge must be carried out during the test period, which is extremely difficult to coordinate for the bridge with large traffic flow and special traffic and transportation task guarantee, and increases the field work difficulty; because traffic is closed, most of power test operations need to be completed within a specified time, and therefore, partial dynamic test results are not complete enough;

(3) traditional power test system, the cable is many, and wiring working cycle is long, the fault rate is high, leads to the test degree of difficulty big on the one hand, and on the other hand has increased the test cost.

Disclosure of Invention

The utility model provides an aim at overcome prior art not enough, a structural vibration intelligence is adopted and is surveyed equipment for bridge does not stop modal test through integrated design, settles on the bridge floor, carries out bridge modal test conveniently.

Technical scheme

The utility model provides a structural vibration intelligence is adopted and is surveyed equipment for test of bridge no parking mode, characterized in that, equipment includes: power module, sensing module, storage module, communication module, GPS module, main control chip, wherein:

each module is integrated on a circuit board, is arranged in the shell through the circuit board, is fixed on a measured position point of the bridge floor, and is used for attaching the sensitive end of the sensing module to a contact surface of a measured object;

the power supply module provides energy for the whole equipment;

the sensing module is used for acquiring acceleration data;

the storage module is used for storing the acquired acceleration data and sending the acceleration data to the cloud end through the communication module;

the communication module adopts a 4G module, transmits the acquired data to the cloud end, and adopts a GPS module for positioning and timing;

the main control chip is connected with the power supply module, the sensing module, the storage module, the communication module and the GPS module and is used for managing data acquisition, transmission and coordination of all modules;

a plurality of devices form an array, the array is arranged on different positions of a bridge floor, and the time between different devices is synchronized through a GPS (global positioning system), so that the bridge modal test under the condition of no road closure and no parking is realized.

Through supporting accessory, arrange this application on the bridge floor different positions, carry out bridge mode test conveniently. The data of the equipment is directly transmitted to the cloud end, cables are not needed, and a computer is not needed to receive data.

1. Wiring is not needed, the field efficiency is greatly improved, and the failure rate is greatly reduced

2. The measuring points are flexibly arranged, the number of the measuring points can be expanded according to the requirement, and no channel limitation exists

3. Need not to seal traffic

Drawings

FIG. 1 is a schematic diagram of hardware modules of the device according to embodiment 1

FIG. 2 schematic diagram of a device main control chip in embodiment 1

FIG. 3 is a circuit diagram of a data acquisition module according to embodiment 1

FIG. 4 circuit diagram of power management module in embodiment 1

FIG. 5 is a circuit diagram of a data transmission module according to embodiment 1

FIG. 6 is a circuit diagram of a data storage module according to embodiment 1

FIG. 7 is a circuit diagram of a GPS module according to embodiment 1

FIG. 8 shows an application scenario in which multiple devices form an array (synchronization is achieved via GPS)

Detailed Description

The technical solutions provided in the present application will be further described with reference to the following specific embodiments and accompanying drawings. The advantages and features of the present application will become more apparent in conjunction with the following description.

It should be noted that the embodiments of the present application have a better implementation and are not intended to limit the present application in any way. The technical features or combinations of technical features described in the embodiments of the present application should not be considered as being isolated, and they may be combined with each other to achieve a better technical effect. The scope of the preferred embodiments of this application may also include additional implementations, and this should be understood by those skilled in the art to which the embodiments of this application pertain.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

The drawings in the present application are in simplified form and are not to scale, but rather are provided for convenience and clarity in describing the embodiments of the present application and are not intended to limit the scope of the application. Any modification of the structure, change of the ratio or adjustment of the size of the structure should fall within the scope of the technical disclosure of the present application without affecting the effect and the purpose of the present application. And the same reference numbers appearing in the various drawings of the present application designate the same features or components, which may be employed in different embodiments.

Example 1

As an example, as shown in fig. 1, the apparatus is composed of: power module, sensing module, storage module, communication module, GPS module, main control chip, wherein:

each module is integrated on a circuit board, is arranged in a shell (not shown) through the circuit board, is fixed at a measured position of a bridge floor, and is used for attaching the sensitive end of the sensing module to a contact surface of a measured object;

the power supply module provides energy for the whole equipment. DC long-term power, internal battery power, external battery power, etc. may be employed.

The sensing module is used for acquiring acceleration data;

the storage module is used for storing the acquired acceleration data and appointing time to send the acceleration data to the cloud end through the communication module according to an appointed format;

the communication module adopts a 4G module, transmits the acquired data to the cloud end, and adopts a GPS module for positioning and timing;

the main control chip is a control device, is connected with the power supply module, the sensing module, the storage module, the communication module and the GPS module, and is used for managing data acquisition frequency, acquisition modes and transmission modes.

By way of example and not limitation, as shown in fig. 2, as an embodiment, the main control chip MCU adopts a chip of model STM32F405RG, the data acquisition module adopts an ADXL355 chip, the power management module adopts an SGM41511 chip, the data transmission module adopts a "guan and tong NL 668" 4G communication module, the GPS module adopts a midge ATGM332D-5N module, and the data storage module adopts a GD25Q128CSIGR chip.

As shown in fig. 2, the connection description of the main control chip:

MCU links to each other by the interface with each function submodule, wherein:

in the aspect of data acquisition,MCU passes through pin 50, pin 51, pin 52, pin 53 and is connected with data acquisition module ADXL355 chip, carries out data interchange through SPI bus protocol between MCU and the data acquisition module, and MCU accessible SPI protocol sends control parameter to the acquisition module, like sampling frequency, sampling range to and begin to gather and finish the collection command, after beginning to gather, also carry out reading of data through this interface.

In the aspect of data transmission,the MCU is connected with the data transmission module (4G) through a pin 55, a pin 56, a pin 57, a pin 58 and a pin 59, and data interaction is carried out between the MCU and the data acquisition module (4G) in a USB protocol mode.

In the aspect of data storage,the MCU is connected with the data storage module through pins 20, 21, 22 and 23, and exchanges data through an SPI bus protocol.

In the aspect of power supply of the power supply,a pin 24 of the MCU is connected with the battery through a divider resistor to reduce the voltage of the battery to a collectable range, and AD analog-to-digital conversion is integrated in the pin 24 to convert a voltage signal into a digital signal, so that the current electric quantity of the battery is collected; the MCU is connected with the power management module through pin 1, pin 13, pin 40 and pin 48, so that the MCU obtains stable 3.3V working voltage.

In the aspect of positioning and timing, the MCU is connected with a GPS module through a pin 15, a pin 31, a pin 32 and a pin 38, and the GPS provides positioning and timing for the equipment. And the MCU and the GPS module exchange data through a UART serial port.

As shown in fig. 3, the data acquisition module employs an ADXL355 chip, in which:

the MCU is connected with the pins 1, 2, 3 and 4, receives the control instruction of the MCU and provides the acquired data for the MCU.

Pin 6 is grounded, pin 5, pin 9 and pin 11 are interfaces for connecting with a power management module, and the power management module provides 3.3v of working voltage for the acquisition module.

And the pin 8 and the pin 10 are used as reference voltage selection pins in the acquisition module, and are provided with auxiliary circuits according to the requirements of the chip.

As shown in fig. 4, the power management module uses an SGM41511 chip to provide 3.3V operating voltage for each module of the device and perform charging management for the battery, where:

and the pin 5 and the pin 6 are connected with the MCU, perform data interaction through an IIC bus protocol and receive a control instruction of the MCU.

The pins 15 and 16 share an output power supply interface for each module of the system, and then the voltage is reduced to 3.3V by an LDO circuit (not shown in the figure, but in the prior art), so as to provide working voltage for the MCU, the data acquisition module, the data transmission module, and the data storage module in the motherboard.

Pin 1 and pin 24 are direct-current power supply input interfaces, namely charging interfaces, and the received charging voltage is 5V.

The pins 13 and 14 are connected with the battery, so that the charging management can be carried out on the battery. Specifically, the pins 13 and 14 are battery interfaces, and when a charger (at the above-mentioned pins 1 and 24) is connected to charge the device, the power management module provides a 4.2V charging voltage for the battery, and performs anti-overcharge management, that is, stops charging after being fully charged. Pins 13, 14 receive battery discharge input when the device is operating.

As shown in fig. 5, the data transmission module adopts a 4G module, specifically selects pan-he-nan NL668 as an embodiment, and can support the domestic whole network communication band.

Specifically, the connection relationship of the pins is as follows:

is connected to the 4G antenna through pin 49 for receiving and transmitting data through the 4G antenna.

Pins 14, 15, 16 and 17 are SIM card pins through which an electronic SIM card is connected. The electronic SIM card provides network communication service authentication for the 4G module.

And the pin 7 is a power input interface and is connected with the power management module to obtain 3.3V working voltage.

The pin 69, the pin 70, the pin 71, the pin 1, the pin 2, the pin 4 and the pin 20 are respectively connected with the MCU and receive the control of the MCU, wherein the pin 69, the pin 70 and the pin 71 are pins for data exchange, and the MCU transmits data to the transmission module for transmission through the pins by a USB protocol; pins 1, 2, 4 and 20 are conventional function control pins, and the MCU can implement general functions of enabling control, disabling, resetting, etc. through these pins.

As shown in fig. 6, the data storage module employs a GD25Q128CSIGR chip that provides 128Mbit of storage capacity:

and the MCU is connected with the MCU through pins 1, 2, 5 and 6, and data exchange is carried out according to an SPI bus protocol. Further, a resistor R40 is provided, and R40 is a pull-up resistor of the SPI chip selection.

The pin 4 is grounded, the pin 8 is connected with the power management module, and the power module provides 3.3V working voltage for the data storage module. Further, as an embodiment, a capacitor C11 and a capacitor C58 are further provided for filtering the input power supply, so as to reduce input power supply ripples.

As shown in FIG. 7, the GPS module adopts a Chinese micro ATGM332D-5N module:

the pin 3 is a GPS second pulse output and is connected with the MCU pin 38 to send the second pulse to the MCU for use.

The pin 10, the pin 22 and the pin 23 are connected with a power management module, the pin 12, the pin 13 and the pin 24 are grounded, and the power management module provides 3.3V working voltage for the GPS module.

The pin 11 is an antenna interface of the GPS module and is used for connecting a GPS antenna of an external device.

Example 2

Application and usage scenarios, as in fig. 8:

in the application scenario (the non-stop bridge modal test) of the method, the array is formed by a plurality of devices in the embodiment 1 for joint test, the networking schematic diagram of the array is shown in fig. 8, a GPS module is arranged in the module, time system synchronization is carried out among the devices, the time precision can reach +/-5 ms, meanwhile, GPS positioning can be carried out on the devices, and the positioning precision is 2.5 meters.

And after the time systems of the equipment are synchronized, testing is carried out, and the bridge mode can be identified by a matched application algorithm according to the test data. The application algorithm does not belong to the invention task of the technical scheme of the application.

Claims (1)

1. The utility model provides a structural vibration intelligence is adopted and is surveyed equipment for test of bridge no parking mode, characterized in that, equipment includes: power module, sensing module, storage module, communication module, GPS module, main control chip, wherein:

each module is integrated on a circuit board, is arranged in the shell through the circuit board, is fixed on a measured position point of the bridge floor, and is used for attaching the sensitive end of the sensing module to a contact surface of a measured object;

the power supply module provides energy for the whole equipment;

the sensing module is used for acquiring acceleration data;

the storage module is used for storing the acquired acceleration data and sending the acceleration data to the cloud end through the communication module;

the communication module adopts a 4G module, transmits the acquired data to the cloud end, and adopts a GPS module for positioning and timing;

the main control chip is connected with the power supply module, the sensing module, the storage module, the communication module and the GPS module and is used for managing data acquisition, transmission and coordination of all modules;

a plurality of devices form an array, the array is arranged on different positions of a bridge floor, and the time between different devices is synchronized through a GPS (global positioning system), so that the bridge modal test under the condition of no road closure and no parking is realized.

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