CN208424382U

CN208424382U - Based on WiFi wirelessly with the distributed signal synchronous of GPS time service

Info

Publication number: CN208424382U
Application number: CN201821513374.3U
Authority: CN
Inventors: 谭荣龙; 许飞云; 陈启山; 江煜
Original assignee: YMC PIEZOTRONICS Inc
Current assignee: Wang Haitao
Priority date: 2018-09-14
Filing date: 2018-09-14
Publication date: 2019-01-22
Anticipated expiration: 2028-09-14

Abstract

The utility model discloses a kind of based on WiFi wirelessly with the distributed signal synchronous of GPS time service, belongs to structural health monitoring technology field.Solve the problems, such as that traditional available data acquisition system wiring cost height, low efficiency, data are asynchronous and can not be by wireless transmission method reliable connection synchronous with GPS.It mainly include multiple sensor nodes in same time synchronization acquisition data, the sensor node is by WiFi by synchronous data transmission to terminal in a manner of wireless-transmission network.The utility model realizes time synchronization truly under WiFi wireless transmission and GPS time service, synchronization accuracy can reach delicate grade even nanosecond, it is low in energy consumption, frequency acquisition is versatile, the complete modularized design of sensor device node circuit, circuit performance is highly stable reliable, life cycle of the product is greatly shortened, enterprises production efficiency is very high；It is of great significance in structural health monitoring technology field.

Description

Based on WiFi wirelessly with the distributed signal synchronous of GPS time service

Technical field

The utility model belongs to structural health monitoring technology field, specifically, more particularly to it is a kind of truly Data are synchronous, low cost of layout, node circuit design modularization, simplification, high stability can wirelessly awarded with GPS based on WiFi When distributed signal synchronous.

Background technique

The part of data acquisition of the monitoring structural health conditions of building at present, distributed signal acquisition mostly use wired Sensor node and the synchronism that data acquisition is kept using system clock, and can only acquire and be transferred to upper at the scene Machine, storing mode mostly use local data base.Shortcoming existing for above data acquisition method is: wired sensor node The range of data acquisition is limited, manpower expends serious and inefficiency；And the acquisition of data is synchronized using system clock It cannot be guaranteed that all the sensors node accurately acquires data in synchronization, to reduce the validity of data；Collection in worksite Data increase the time cost of data acquisition, monitoring structural health conditions that cannot for a long time to the building under adverse circumstances；Storage Mode limits the real-time of data.

With the progress of GPS technology, the appearance of the timing function of GPS is so that accurately obtaining for a wide range of distributed synchronization data Taking becomes a kind of possibility, but receives wired constraint again while be applied to the timing function of GPS at present so that measure away from From because data line presence and be only confined on small-scale distributed data acquisition, but again with WiFi, ZigBee, The rapid development of the wireless technologys such as Bluetooth, the methods in terms of the transmission of data have also stepped major step therewith, can be with Data are transferred to the storage and analysis port of data by wireless transmission mode from collection terminal.Application publication number CN105487448A, data of publication of application 2016.04.13, utility model create a kind of entitled sensing based on GPS sync identification The Chinese patent of device data acquisition device, although this application refers to GPS sync identification, wireless data transmission etc., but it is specific Technical solution is indefinite, and those skilled in the art cannot achieve the technical solution at all.

So, how the simultaneous techniques of wireless transmission method and GPS effectively, to be reliably combined together, in other words How the simultaneous techniques of wireless transmission method and GPS reliablely and stablely to be applied in terms of data acquisition and monitoring, is wireless The problem of sensor network technique field urgent need to resolve.

Utility model content

The purpose of this utility model is in view of the deficienciess of the prior art, to provide a kind of data truly same Step, low cost of layout, node circuit design modularization, simplification, high stability can based on WiFi wirelessly with GPS time service point Cloth signal synchronous collection system.

The utility model is achieved through the following technical solutions:

It is a kind of based on WiFi wirelessly with the distributed signal synchronous of GPS time service, including it is multiple in the same time The sensor node of synchronous acquisition, the sensor node is by WiFi by synchronous data transmission in a manner of wireless-transmission network To terminal；

The sensor node includes GPS module, WiFi module, power management module and data acquisition module；It is described Power management module is the GPS module, the WiFi module, the data acquisition module provide working power；The GPS mould Block is connect with satellite electric signal, and UTC time information, 1PPS pulse signal are sent to the data with UART communication mode and acquired The data acquisition module of module, multiple sensor nodes carries out data acquisition in the rising edge or failing edge of 1PPS pulse simultaneously； Synchrodata is sent to WiFi module by the data acquisition module in a manner of serial communication after acquisition；The WiFi module is logical IP address matching connection gateway sensor node is crossed, the information received is sent to gateway sensor node, the gateway passes The data summarized are sent to terminal by sensor node.

Preferably, the topological structure of the wireless-transmission network is star network topology, multiple synchronous acquisitions Sensor node in one of them be gateway sensor node, remaining is general sensor nodes；The ordinary sensors The WiFi module of node is station mode, and the WiFi module of the gateway sensor node is AP+station mode.

Preferably, the terminal is local service or remote server；When the terminal is remote server, the gateway The data summarized are transmitted to cloud database by Ethernet by sensor node, and long-range host computer and/or cell phone application pass through ether Net is locally downloading by the data in cloud database；When the terminal is local server, the gateway sensor node passes through WiFi is transmitted directly to local server.

Preferably, the data acquisition module includes that master controller MCU unit, A/D converter unit and vibration accelerate Spend sensor unit, the rising edge/decline for the 1PPS pulse that the vibration acceleration sensor unit is sent in the GPS module Along the acquisition for the vibration acceleration signal and ambient temperature signal realized on x, y, z direction, the A/D converter unit will vibrate The analog signal of acceleration transducer output is converted to digital signal, and the A/D converter unit will be counted using SPI communication mode According to the master controller MCU unit is sent to, the master controller MCU is sent the data of acquisition with UART serial communication mode To the WiFi module.

Preferably, after the buffered amplifier unit caching amplification of the collected data of vibration acceleration sensor unit It is sent to the A/D converter unit, the caching amplifier unit includes LT6236 amplifier chip, and LT6236 amplifier chip is defeated Outlet is connected on the input terminal of A/D converter unit.

Preferably, the LPC54113J256BD64 for the MCU model NXP company that the master controller MCU unit uses；Institute State the LTC2344-16 that A/D conversion chip used by A/D converter unit is TI company；The vibration acceleration sensor list Sensor model number used by member is the ADXL356 of TI company；

RANGE, ST1, ST2 pin of the ADXL356 respectively with the PIO1_2 of the LPC54113J256BD64, PIO1_1, PIO1_0 pin conduction are connected, and start for controlling ADXL356 in rising edge/failing edge of GPS module 1PPS pulse Carry out the acquisition of the vibration acceleration signal and ambient temperature signal on x, y, z direction；The STBY pin of the ADXL356 and total The PIO1_3 pin of controller MCULPC54113J256BD64 is electrically connected, by master controller MCULPC54113J256BD64 to vibration Standby/measurement operating mode of dynamic acceleration transducer ADXL356 is selected；The TEMP pin of the ADXL356, XOUT, YOUT, ZOUT pin are conductively connected with the input pin of four LT6236 amplifier chips respectively, respectively by ambient temperature signal, X The vibration acceleration signal on vibration acceleration signal, Y direction, the vibration acceleration signal in Z-direction in axis direction It exports after caching amplification to A/D converter unit；The VIPBANA pin of the vibration acceleration sensor ADXL356 with it is described The REFIN pin of the LTC2344-16 of A/D converter unit is conductively connected, and is mainly used for providing input to LTC2344-16 chip The reference voltage of signal；

The A/D converter LTC2344-16 is by the digital data transmission after conversion to the master controller MCULPC54113J256BD64, the master controller MCULPC54113J256BD64 are by the PD pin of LTC2344-16 to institute Standby/the normal mode of operation for stating LTC2344-16 is controlled.

Preferably, the GPS module is using the UM220-IIIL model module led to star core, RF_IN pin Aerial signal input terminal；The PIO0_2 pin conduction of its AADET_N pin and master controller MCULPC54113J256BD64 connect It connects, for the selection to active antenna, passive antenna type；Its GPIO2 pin and master controller MCULPC54113J256BD64 PIO0_3 pin be conductively connected, for judging whether antenna normal over the ground；Its TIME PULSE pin and master controller The PIO0_4 pin of MCULPC54113J256BD64 is conductively connected, for 1PPS pulse signal to be sent to the master controller MCULPC54113J256BD64；The PIO0_6 pin conduction of its RXD1 pin and master controller MCULPC54113J256BD64 connect It connects, for receiving the instruction from master controller MCULPC54113J256BD64；Its TXD1 pin and master controller The PIO0_5 pin of MCULPC54113J256BD64 is conductively connected, after GPS module receives instruction, to master controller MCULPC54113J256BD64 sends the UTC time information that master controller MCULPC54113J256BD64 specifies data format.

Preferably, the USR-C216 wireless module using Jinan someone company of the WiFi module；Its RFIO pipe Foot is aerial signal input terminal；The PIO0_0 pin of its USRT0_TX pin and master controller MCULPC54113J256BD64 is led Electrical connection, for the data received from the outside to be sent to master controller MCULPC54113J256BD64；Its USRT0_RX pipe The PIO0_1 pin of foot and master controller MCULPC54113J256BD64 are conductively connected, for adopting the data acquisition module The data of collection are sent；The PIO1_8 pin conduction of its nReload pin and master controller MCULPC54113J256BD64 connect It connects, WiFi network is configured by master controller MCULPC54113J256BD64, drag down 0.5-3s starting Simple Config Airkiss distribution drags down 3s or more factory reset；Its nLink pin and master controller The PIO1_7 pin of MCULPC54113J256BD64 is conductively connected, which is WiFi module connection instruction pin；Its nReady The PIO1_9 pin of pin and master controller MCULPC54113J256BD64 are conductively connected, which indicates WiFi module work Normal instruction pin.

Preferably, the connecting wire line width between the RFIO pin and antenna RF of the USR-C216 wireless module is according to resistance Anti- matching is designed.

Preferably, the power management module include rechargeable battery, battery charging unit, battery capacity detection unit and Voltage conversion unit, the battery charging unit use usb mode for the charging using BQ24092 as core chips Battery charging；The battery capacity detection unit is used to detect the electricity of the rechargeable battery, using BQ27411 as core core Piece sends electric signal to the master controller MCU unit, by the master controller MCU when the electric quantity of rechargeable battery is too low Unit controls the GPS module, the WiFi module, the data acquisition module and enters stand-by operation state.

Compared with prior art, the utility model has the beneficial effects that

1. the utility model can overcome wired sensor data collection system labor workload big, working efficiency is low, adopts Collect data it is asynchronous and can not real-time monitoring vibration parameters the defects of, realized in the case where WiFi wireless transmission is with GPS time service true Time synchronization in positive meaning, keeps collected data more accurate, and the confidence level for increasing data analysis result is realized automatically Change synchronous data sampling, improves data validity；

2. the utility model meets requirement of the current distributed data acquisition to monitoring range, big in the case where wireless The range of data acquisition is increased greatly；Reduce weight of equipment to acquire data it is more convenient and breviaty inserting knot is many and diverse The step of, so that working in the presence of a harsh environment in monitoring building and long-time becomes possibility；

3. the utility model is effective by USR-C216WiFi wireless module and the simultaneous techniques of UM220-IIILGPS module Ground is reliably combined together, and synchronization accuracy can reach delicate grade even nanosecond, and synchronization accuracy is very high, in addition simultaneously The size of equipment is greatly reduced, it is easy to carry, a large amount of manpower and material resources are saved, the efficiency of data acquisition is improved, are reduced Cost provides reliable underlying basis for the wireless sensor network and data testing system of setting up large-scale；

4. the entire sensor node circuit design power consumption of the utility model is very low, primary charging is no external power supply the case where Under can be continuous work 4 more than hour；

5. the utility model is versatile, sample frequency can freely be adjusted within the scope of 10Hz-20kHz, total by changing Communication baud rate between controller MCULPC54113J256BD64 and A/D converter LTC2344-16 is come the frequency tune realized Section；

6. the complete modularized design of sensor node circuit of the utility model, circuit performance is highly stable reliable, failure Rate is very low, long service life, and simplifiedly life cycle of the product is greatly shortened in circuit design, and enterprises production efficiency is very It is high；It is of great significance in structural health monitoring technology field.

Detailed description of the invention

Fig. 1 is distributed signal synchronous acquisition schematic diagram of the utility model based on GPS time service；

Fig. 2 be the utility model sensor node as general sensor nodes when each functions of modules schematic diagram；

Fig. 3 be the utility model sensor node as gateway sensor node when each functions of modules schematic diagram；

Fig. 4 is the utility model data wireless transmission schematic diagram；

Fig. 5 is the utility model sensor node system block diagram；

Fig. 6 is the circuit diagram of the master controller MCU unit of the utility model data acquisition module；

Fig. 7 is the A/D converter element circuit schematic diagram of the utility model data acquisition module；

Fig. 8 is the vibration acceleration sensor element circuit schematic diagram of the utility model data acquisition module；

Fig. 9 is the utility model caching amplifier unit circuit diagram；

Figure 10 is the utility model GPS module circuit diagram；

Figure 11 is the utility model WiFi module circuit diagram；

Figure 12 is the utility model power management module rechargeable battery and battery charging unit circuit diagram；

Figure 13 is the utility model power management module battery capacity detection cell circuit schematic diagram；

Figure 14 is the utility model voltage conversion unit circuit diagram.

In figure: 1. sensor nodes；2.GPS module；3.WiFi module；4. power management module；5. data acquisition module； 6. satellite；7. master controller MCU unit；8.A/D converter unit；9. vibration acceleration sensor unit.

Specific embodiment

The present invention will be further described with reference to the accompanying drawing:

The sensor node 1 includes GPS module 2, WiFi module 3, power management module 4 and data acquisition module 5； The power management module 5 is the GPS module 2, the WiFi module 3, the data acquisition module 5 provide working power； The GPS module 2 is connect with 6 electric signal of satellite, is sent to UTC time information, 1PPS pulse signal with UART communication mode The data acquisition module 5 of the data acquisition module 5, multiple sensor nodes 1 is same in the rising edge or failing edge of 1PPS pulse The acquisition of Shi Jinhang data；Synchrodata is sent to WiFi mould by the data acquisition module 5 in a manner of serial communication after acquisition Block 3；The WiFi module 3 matches connection gateway sensor node by IP address, and the information received is sent to gateway and is passed The data summarized are sent to terminal by sensor node, the gateway sensor node.

Preferably, the data acquisition module 5 includes that master controller MCU unit 7, A/D converter unit 8 and vibration add Speed sensor units 9, the rising for the 1PPS pulse that the vibration acceleration sensor unit 8 is sent in the GPS module 2 Edge/failing edge realizes the acquisition of vibration acceleration signal and ambient temperature signal on x, y, z direction, the A/D converter list The analog signal of vibration acceleration sensor output is converted to digital signal by member 8, and the A/D converter unit 8 is logical using SPI Letter mode sends the data to the master controller MCU unit 7, and the master controller MCU7 will be adopted with UART serial communication mode The data of collection are sent to the WiFi module 3.

Preferably, the LPC54113J256BD64 for the MCU model NXP company that the master controller MCU unit 7 uses； A/D conversion chip used by the A/D converter unit 8 is the LTC2344-16 of TI company；The vibration acceleration sensing Sensor model number used by device unit 9 is the ADXL356 of TI company；

Preferably, the USR-C216 wireless module using Jinan someone company of the WiFi module 3；Its RFIO pipe Foot is aerial signal input terminal；The PIO0_0 pin of its USRT0_TX pin and master controller MCULPC54113J256BD64 is led Electrical connection, for the data received from the outside to be sent to master controller MCULPC54113J256BD64；Its USRT0_RX pipe The PIO0_1 pin of foot and master controller MCULPC54113J256BD64 are conductively connected, for adopting the data acquisition module 5 The data of collection are sent；The PIO1_8 pin conduction of its nReload pin and master controller MCULPC54113J256BD64 connect It connects, WiFi network is configured by master controller MCULPC54113J256BD64, drag down 0.5-3s starting Simple Config Airkiss distribution drags down 3s or more factory reset；Its nLink pin and master controller The PIO1_7 pin of MCULPC54113J256BD64 is conductively connected, which is WiFi module connection instruction pin；Its nReady The PIO1_9 pin of pin and master controller MCULPC54113J256BD64 are conductively connected, which indicates WiFi module work Normal instruction pin.

Preferably, the power management module 4 include rechargeable battery, battery charging unit, battery capacity detection unit with And voltage conversion unit, the battery charging unit use usb mode to fill for described in using BQ24092 as core chips Battery charging；The battery capacity detection unit is used to detect the electricity of the rechargeable battery, using BQ27411 as core core Piece sends electric signal to the master controller MCU unit 7, by the master controller when the electric quantity of rechargeable battery is too low MCU unit 7 controls the GPS module 2, the WiFi module 3, the data acquisition module 5 and enters stand-by operation state.

Utility model works process is described in detail by taking star network topology as an example.

Embodiment 1:

The present embodiment includes multiple sensor nodes in same time synchronization acquisition data, which passes through WiFi is in a manner of wireless-transmission network by synchronous data transmission to terminal.

As shown in Figure of description Fig. 1 to Fig. 4, sensor node 1 includes GPS module 2, WiFi module 3, power management mould Block 4 and data acquisition module 5；Power management module 5 is GPS module 2, WiFi module 3, data acquisition module 5 provide work Power supply；GPS module 2 is connect with 6 electric signal of satellite, is sent to UTC time information, 1PPS pulse signal with UART communication mode Data acquisition module 5, the data acquisition modules 5 of multiple sensor nodes 1 1PPS pulse rising edge or failing edge simultaneously into The acquisition of row data；Synchrodata is sent to WiFi module 3 by data acquisition module 5 in a manner of serial communication after acquisition；As said Shown in bright book attached drawing Fig. 4, the present embodiment network topology structure is star network topology, i.e., the biography of multiple synchronous acquisitions One of them in sensor node is gateway sensor node, remaining is general sensor nodes；The present embodiment WiFi module 3 is adopted It is the USR-C216 wireless module of Jinan someone company, is station mode by the WiFi module of general sensor nodes, It is AP+station mode by the WiFi module of gateway sensor node, the WiFi module of each general sensor nodes is by IP Location matching is connect with gateway sensor node, and each general sensor nodes will synchronize the information received and be sent to gateway sensing Device node is summarized the synchrodata that each sensor node includes gateway node oneself acquisition by gateway node, then The data summarized are sent to terminal by gateway sensor node.

The present embodiment terminal is local service or remote server；When terminal is remote server, gateway sensor node The data summarized are transmitted to cloud database by Ethernet, long-range host computer and/or cell phone application pass through Ethernet for cloud data Data in library are locally downloading；When terminal is local server, gateway sensor node is transmitted directly to local by WiFi Server.

The present embodiment data acquisition module 5 includes that master controller MCU unit 7, A/D converter unit 8 and vibration accelerate Sensor unit 9 is spent, vibration acceleration sensor unit 9 is real in the rising edge/failing edge for the 1PPS pulse that GPS module 2 is sent The acquisition of vibration acceleration signal and ambient temperature signal on existing x, y, z direction, A/D converter unit 8 is by vibration acceleration The analog signal of sensor output is converted to digital signal, and A/D converter unit 8 is sent the data to using SPI communication mode Master controller MCU unit 7, the data of acquisition are sent to WiFi module 3 with UART serial communication mode by master controller MCU7.

The specific acquisition method of the present embodiment includes the following steps:

A., multiple sensor nodes 1 are distributed in the different places of scene according to actual scene, are each sensor node WiFi module 3, power management module 4, data acquisition module 5 and the GPS module 2 connecting with 6 electric signal of satellite are configured, it is multiple The sensor node 1 constitutes wireless sensor network by star network topology；

B. using one of sensor node of multiple sensor nodes 1 as gateway node, by its WiFi mode setting For AP+station mode；Other sensors node is general sensor nodes, sets station mould for its WiFi module Formula；

C. the I2C communication bus of each sensor node 1 is initialized；

D. the master controller MCU unit 7 of the data acquisition module 5 of sensor node 1 starts to obtain charging source management module 4 Information about power, the status information of battery is sent to master controller MCU unit 7 by I2C communication mode, and master controller MCU is mono- Whether the electric quantity of rechargeable battery that member 7 detects power management module 4 is sufficient；Step Step d is carried out if detection is judged as "Yes", Terminate data acquisition if detection is judged as "No"；

E. master controller MCU unit 7 open GPS module 2, WiFi module 3, data acquisition module 5 A/D converter unit 8, each module switch of vibration acceleration sensor unit 9 of data acquisition module, waits signal to be collected；

F. the UART communication bus of each sensor node 1 is initialized；

G. GPS module 2 is initialized；

H. delay waits GPS module 2 to stablize；

I. whether constantly detection GPS module 2 generates 1PPS pulse signal, carries out step i after detecting 1PPS pulse signal；

1PPS pulse signal and UTC time information are sent to master controller using UART communication mode by j.GPS module 6 MCU unit 7；

K. master controller MCU unit 7 receives 1PPS pulse signal from GPS module, UTC time information, when extracting UTC Between and detect rising edge/failing edge of 1PPS pulse signal；

When l. detecting rising edge/failing edge, each triggering of master controller MCU unit 7 is interrupted, while ordering respectively sensing 9 synchronization of vibration acceleration sensor unit of device node 1 acquires data, i.e., vibration acceleration sensor unit 9 is in GPS mould The rising edge for the 1PPS pulse that block 2 is sent/failing edge realizes the vibration acceleration signal and ambient temperature signal on x, y, z direction Acquisition；

M. the vibration acceleration sensor unit 9 of each sensor node 1 is by the signal of acquisition through A/D converter unit 8 It is sent to master controller MCU unit 7 after signal conversion, master controller MCU unit 7 gets synchrodata and UTC time information；

N. the data that the master controller MCU unit 7 of each sensor node 1 will acquire are sent to respectively after being handled WiFi module；

O.WiFi module is that the sensor node of station mode sends data to WiFi module through WiFi wireless transmission For the gateway sensor node of AP+station mode；

P. gateway sensor node by other sensors node acquire data and its own acquisition data summarization after through gateway The WiFi module of sensor node is sent to terminal.

Briefly, GPS module 2 receives the information from satellite by its timing function, which includes Hour Minute Second UTC time information, other than the information containing having time, GPS module 2 also generates one section of pulse, this pulse, that is, 1PPS, the pulse Rising edge/failing edge snap to beginning in 1 second of temporal information, it is mono- which is sent to master controller MCU by GPS module 2 Member 7, the acquisition for carrying out data is interrupted in triggering when master controller MCU unit 7 detects rising edge/failing edge of pulse, so just It ensure that multiple equipment carries out data acquisition in synchronization, the synchronization accuracy of data can reach delicate i.e. even nanosecond Grade, in addition to pulse guarantees the acquisition of data in synchronization；There are also temporal informations to be sent to controller by UART communication mode, It is the data obtained at what moment convenient for user's identification, meanwhile, the synchronism for also giving data verifies the available way of a row Diameter.The method of the hop of data acquisition is that data are transferred to finger from each equipment by WiFi wireless transmission mode Fixed place analysis is used or is stored；Wherein master controller MCU unit 7 will be processed by the communication mode of UART Data are transferred to WiFi module, and WiFi module carries out IP pairing with the standard agreement of 802.11b/g/n and gateway sensor node, After successful matching, connection status is kept to prepare transmission data with paired device, once receive the biography of master controller MCU unit 7 The data that bottom obtains are transferred to gateway and passed by the data and transmission instruction come, the transmission mode that equipment will pass through wireless WiFi Sensor node.The data summarized are transmitted to cloud database, long-range host computer and/or hand by Ethernet by gateway sensor node Machine APP is locally downloading by the data in cloud database by Ethernet；When terminal is local server, gateway sensor node Local server is transmitted directly to by WiFi.

The present embodiment can overcome wired sensor data collection system labor workload big, and working efficiency is low, acquire number According to it is asynchronous and can not real-time monitoring vibration parameters the defects of, realize real meaning in the case where WiFi wireless transmission is with GPS time service Time synchronization in justice keeps collected data more accurate, and the confidence level for increasing data analysis result realizes automation number According to synchronous acquisition, data validity is improved；The present embodiment meets requirement of the current distributed data acquisition to monitoring range, The range of data acquisition is considerably increased in the case where wireless；Reducing weight of equipment makes acquisition data more convenient and contracting The many and diverse step of simple inserting knot, so that working in the presence of a harsh environment in monitoring building and for a long time, become can Energy.

Embodiment 2:

The present embodiment data acquisition module 5 includes that master controller MCU unit 7, A/D converter unit 8 and vibration accelerate Sensor unit 9 is spent, vibration acceleration sensor unit 8 is real in the rising edge/failing edge for the 1PPS pulse that GPS module 2 is sent The acquisition of vibration acceleration signal and ambient temperature signal on existing x, y, z direction, A/D converter unit 8 is by vibration acceleration The analog signal of sensor output is converted to digital signal, and A/D converter unit 8 is sent the data to using SPI communication mode The master controller MCU unit 7, the data of acquisition are sent to WiFi module with UART serial communication mode by master controller MCU7 3。

The LPC54113J256BD64 for the MCU model NXP company that the present embodiment master controller MCU unit 7 uses；A/D A/D conversion chip used by converter unit 8 is the LTC2344-16 of TI company；The vibration acceleration sensor unit is adopted The A/D converter unit, the caching amplifier list are sent to after the buffered amplifier unit caching amplification of the data collected Member includes LT6236 amplifier chip, and LT6236 amplifier chip output end is connected on the input terminal of A/D converter unit.Caching amplification Device unit main function is to provide low output impedance, can quickly establish analog signal in acquisition phase.When entering acquisition, it is also Isolation between signal source and electric charge stream is provided at simulation input.

RANGE, ST1, ST2 pin of ADXL356 respectively with PIO1_2, PIO1_1 of the LPC54113J256BD64, PIO1_0 pin conduction be connected, for control ADXL356 rising edge/failing edge of GPS module 1PPS pulse start carry out x, Y, the acquisition of the vibration acceleration signal and ambient temperature signal on the direction z；The STBY pin and master controller of the ADXL356 The PIO1_3 pin of MCULPC54113J256BD64 is electrically connected, and is accelerated by master controller MCULPC54113J256BD64 to vibration Standby/measurement operating mode of degree sensors A DXL356 is selected；The TEMP pin of the ADXL356, XOUT, YOUT, ZOUT pin is conductively connected with the input pin of four LT6236 amplifier chips respectively, respectively by ambient temperature signal, X-direction On vibration acceleration signal, the vibration acceleration signal in Y direction, the vibration acceleration signal in Z-direction caching put It exports after big to A/D converter unit；The VIPBANA pin and the A/D of the vibration acceleration sensor ADXL356 is converted The REFIN pin of the LTC2344-16 of device unit is conductively connected, and is mainly used for providing input signal to LTC2344-16 chip Reference voltage；

A/D converter LTC2344-16 is by the digital data transmission after conversion to master controller MCULPC54113J256BD64, master controller MCULPC54113J256BD64 pass through the PD pin pair of LTC2344-16 Standby/normal mode of operation of LTC2344-16 is controlled.As shown in Figure of description Fig. 7, CNV pin, SDI pin, Identical network label is conductive on the uniform LPC54113J256BD64 chip of SCK1 pin, SDI0 pin, BUSY pin, CS pin Connection；Its CNV pin is that A/D conversion starts to input, and CNV is not controlled by CS, allows to start independently of serial i/O bus state Conversion；Its SDI pin receives the instruction that LPC54113J256BD64 is sent to LTC2344-16, and LPC54113J256BD64 is first sent out The flat input range of power transmission is instructed to LTC2344-16, and it is corresponding level model that then LTC2344-16, which controls the level of input interface, It encloses；Its SCK1 pin is CMOS serial clock input terminal；Its SDI0 pin is the output end of entire A/D chip, i.e. analog signal Be converted to the output end of digital signal；Its BUSY pin is easy for MCU and judges the whether busy pin of A/D chip, busy signal Expression is being converted；CS pin is chip selection input terminal, and serial data I/O bus is enabled when CS is low, in CS high Disabling, enables, CS can also open external clock SCKI in Hi-Z.

For GPS module using the UM220-IIIL model module led to star core, RF_IN pin is aerial signal input End；The PIO0_2 pin of its AADET_N pin and master controller MCULPC54113J256BD64 are conductively connected, for active The selection of antenna, passive antenna type；The PIO0_3 pin of its GPIO2 pin and master controller MCULPC54113J256BD64 It is conductively connected, for judging whether antenna is normal over the ground；Its TIME PULSE pin and master controller The PIO0_4 pin of MCULPC54113J256BD64 is conductively connected, for 1PPS pulse signal to be sent to the master controller MCULPC54113J256BD64；The PIO0_6 pin conduction of its RXD1 pin and master controller MCULPC54113J256BD64 connect It connects, for receiving the instruction from master controller MCULPC54113J256BD64；Its TXD1 pin and master controller The PIO0_5 pin of MCULPC54113J256BD64 is conductively connected, after GPS module receives instruction, to master controller MCULPC54113J256BD64 sends the UTC time information that master controller MCULPC54113J256BD64 specifies data format. Three light emitting diodes in the module are test indicator light.

When sensor node is ordinary node, station mode is set by USR-C216 wireless module, i.e., is passed at this time Sensor node only sends the data of system acquisition.When sensor node is gateway node, by the wireless mould of USR-C216 Block is set as ap mode+station mode, and the data received from the outside can be sent to MCU, and energy by sensor node at this time The data that internal acquisition module acquires are sent；Briefly, sensor node has receive capabilities to have transmission again at this time Function.The USR-C216 wireless module using Jinan someone company of WiFi module 3；Its RFIO pin is that aerial signal is defeated Enter end；The PIO0_0 pin of its USRT0_TX pin and master controller MCULPC54113J256BD64 are conductively connected, for will be from The data that outside receives are sent to master controller MCULPC54113J256BD64；Its USRT0_RX pin and master controller The PIO0_1 pin of MCULPC54113J256BD64 is conductively connected, and the data for acquiring the data acquisition module 5 are sent It goes out；The PIO1_8 pin of its nReload pin and master controller MCULPC54113J256BD64 are conductively connected, by master control Device MCULPC54113J256BD64 configures WiFi network, drag down 0.5-3s starting Simple Config or Airkiss distribution drags down 3s or more factory reset；Its nLink pin is with master controller MCULPC54113J256BD64's PIO1_7 pin is conductively connected, which is WiFi module connection instruction pin；Its nReady pin and master controller The PIO1_9 pin of MCULPC54113J256BD64 is conductively connected, which indicates WiFi module instruction pin working properly.It should Five light emitting diodes in module are test indicator light.

The power management module 4 turns including rechargeable battery, battery charging unit, battery capacity detection unit and voltage Unit is changed, the battery charging unit uses usb mode to fill for the rechargeable battery using BQ24092 as core chips Electricity；The battery capacity detection unit is used to detect the electricity of the rechargeable battery, using BQ27411 as core chips, in institute State electric quantity of rechargeable battery it is too low when, send electric signal to the master controller MCU unit 7, by the master controller MCU unit 7 It controls the GPS module 2, the WiFi module 3, the data acquisition module 5 and enters stand-by operation state.Battery charging unit Using BQ24092 as core chips, usb mode is used to charge for the rechargeable battery；Battery capacity detection unit is used for The electricity for detecting the rechargeable battery, when electric quantity of rechargeable battery is too low, sends electric signal using BQ27411 as core chips To master controller MCU unit 7, GPS module 2, WiFi module 3, data acquisition module 5 are controlled by master controller MCU unit 7 and entered Stand-by operation state.As shown in Figure of description Figure 12 to Figure 14, peripheral circuit, the electric power detection core of charging chip BQ24092 Piece BQ27411 peripheral circuit is chip manufacturer's recommended circuit, and the SDA pin of BQ27411, SCL pin are and master controller The upper identical network label of MCULPC54113J256BD64 is conductively connected, and is passed respectively to master controller MCULPC54113J256BD64 The normal electricity electric signal of defeated rechargeable battery and under-voltage electric signal.In the module, two-color-dio light emitting diode is charging Status indicator lamp, light emitting diode D4 are that rechargeable battery works normally indicator light, and light emitting diode D3 is the under-voltage finger of rechargeable battery Show that lamp, two led of residue etc. are circuit test indicator light.Supply voltage is 3.7V, the supply voltage of rechargeable battery when USB direct charger For 4.2V；TPS61222 chip is boost chip, and it is straight that the direct supply voltage of USB or rechargeable battery powered voltage are converted to 5V Galvanic electricity pressure；TPS62080 chip is decompression chip, and it is straight that the direct supply voltage of USB or rechargeable battery powered voltage are converted to 3V Galvanic electricity pressure.

The present embodiment is as 1 acquisition method of embodiment, on the basis of having 1 advantage of embodiment, also by USR- C216WiFi wireless module and the simultaneous techniques of UM220-IIILGPS module effectively, are reliably combined together, synchronization accuracy It can reach delicate grade even nanosecond, synchronization accuracy is very high, the size of equipment is greatly reduced, simultaneously in addition convenient for taking Band saves a large amount of manpower and material resources, improves the efficiency of data acquisition, reduces cost, for setting up large-scale wireless biography Sensor network and data testing system provide reliable underlying basis；The entire sensor node circuit design function of the present embodiment Consume very low, primary charging can be continuous work 4 more than hour in the case where no external power supply；The present embodiment is versatile, adopts Sample frequency can freely be adjusted within the scope of 10Hz-20kHz, be turned by changing master controller MCULPC54113J256BD64 and A/D Communication baud rate between parallel operation LTC2344-16 is adjusted come the frequency realized；The sensor device node circuit of the present embodiment is complete Modularized design, circuit performance is highly stable reliable, and failure rate is very low, long service life, and simplifiedly circuit design is substantially Degree shortens life cycle of the product, and enterprises production efficiency is very high；It is of great significance in structural health monitoring technology field.

Embodiment 3:

The present embodiment, will be between the RFIO pin and antenna RF of USR-C216 wireless module on the basis of embodiment 2 Connecting wire line width is designed as 20mil, is designed according to impedance matching.The present embodiment is reached by designing impedance matching The purpose that load point can be all reached to the microwave signal of all high frequencies does not have signal reflex and returns source point, to promote the energy Benefit.

In conclusion the preferred embodiment of only the utility model, is not used to limit the utility model implementation Range, all equivalent changes according to carried out by shape described in the utility model claims range, construction, feature and spirit with repair Decorations, should be included in the scope of the claims of the utility model.

Claims

1. it is a kind of based on WiFi wirelessly with the distributed signal synchronous of GPS time service, it is characterised in that: including it is multiple The sensor node of same time synchronization acquisition data, the sensor node will be synchronized in a manner of wireless-transmission network by WiFi Data are transmitted to terminal；

The sensor node includes GPS module, WiFi module, power management module and data acquisition module；The power supply Management module is the GPS module, the WiFi module, the data acquisition module provide working power；The GPS module with Satellite electric signal connection, is sent to the data acquisition module for UTC time information, 1PPS pulse signal with UART communication mode The data acquisition module of block, multiple sensor nodes carries out data acquisition in the rising edge or failing edge of 1PPS pulse simultaneously；It adopts Synchrodata is sent to WiFi module by the data acquisition module in a manner of serial communication after collection；The WiFi module passes through The information received is sent to gateway sensor node, the gateway sensing by IP address matching connection gateway sensor node The data summarized are sent to terminal by device node.

2. it is according to claim 1 based on WiFi wirelessly with the distributed signal synchronous of GPS time service, feature Be: the topological structure of the wireless-transmission network is star network topology, the sensor section of multiple synchronous acquisitions One of them in point is gateway sensor node, remaining is general sensor nodes；The WiFi of the general sensor nodes Module is station mode, and the WiFi module of the gateway sensor node is AP+station mode.

3. it is according to claim 1 based on WiFi wirelessly with the distributed signal synchronous of GPS time service, feature Be: the terminal is local service or remote server；When the terminal is remote server, the gateway sensor node The data summarized are transmitted to cloud database by Ethernet, long-range host computer and/or cell phone application pass through Ethernet for cloud data Data in library are locally downloading；When the terminal is local server, the gateway sensor node is directly passed by WiFi It is defeated to arrive local server.

4. it is according to claim 1 based on WiFi wirelessly with the distributed signal synchronous of GPS time service, feature Be: the data acquisition module includes master controller MCU unit, A/D converter unit and vibration acceleration sensor list Member, the rising edge/failing edge for the 1PPS pulse that the vibration acceleration sensor unit is sent in the GPS module realize x, y, The acquisition of vibration acceleration signal and ambient temperature signal on the direction z, the A/D converter unit sense vibration acceleration The analog signal of device output is converted to digital signal, and the A/D converter unit sends the data to institute using SPI communication mode Master controller MCU unit is stated, the data of acquisition are sent to the WiFi with UART serial communication mode by the master controller MCU Module.

5. it is according to claim 4 based on WiFi wirelessly with the distributed signal synchronous of GPS time service, feature It is: is sent to after the buffered amplifier unit caching amplification of the collected data of vibration acceleration sensor unit described A/D converter unit, the caching amplifier unit include LT6236 amplifier chip, and LT6236 amplifier chip output end is connected on The input terminal of A/D converter unit.

6. it is according to claim 4 based on WiFi wirelessly with the distributed signal synchronous of GPS time service, feature It is: the LPC54113J256BD64 for the MCU model NXP company that the master controller MCU unit uses；The A/D conversion A/D conversion chip used by device unit is the LTC2344-16 of TI company；The vibration acceleration sensor unit is used Sensor model number be TI company ADXL356；

RANGE, ST1, ST2 pin of the ADXL356 respectively with PIO1_2, PIO1_1 of the LPC54113J256BD64, PIO1_0 pin conduction be connected, for control ADXL356 rising edge/failing edge of GPS module 1PPS pulse start carry out x, Y, the acquisition of the vibration acceleration signal and ambient temperature signal on the direction z；The STBY pin and master controller of the ADXL356 The PIO1_3 pin of MCULPC54113J256BD64 is electrically connected, and is accelerated by master controller MCULPC54113J256BD64 to vibration Standby/measurement operating mode of degree sensors A DXL356 is selected；The TEMP pin of the ADXL356, XOUT, YOUT, ZOUT pin is conductively connected with the input pin of four LT6236 amplifier chips respectively, respectively by ambient temperature signal, X-direction On vibration acceleration signal, the vibration acceleration signal in Y direction, the vibration acceleration signal in Z-direction caching put It exports after big to A/D converter unit；The VIPBANA pin and the A/D of the vibration acceleration sensor ADXL356 is converted The REFIN pin of the LTC2344-16 of device unit is conductively connected, and is mainly used for providing input signal to LTC2344-16 chip Reference voltage；

7. it is according to claim 4 based on WiFi wirelessly with the distributed signal synchronous of GPS time service, feature Be: for the GPS module using the UM220-IIIL model module led to star core, RF_IN pin is that aerial signal is defeated Enter end；The PIO0_2 pin of its AADET_N pin and master controller MCULPC54113J256BD64 are conductively connected, for having The selection of source antenna, passive antenna type；The PIO0_3 of its GPIO2 pin and master controller MCULPC54113J256BD64 are managed Foot is conductively connected, for judging whether antenna is normal over the ground；Its TIME PULSE pin and master controller The PIO0_4 pin of MCULPC54113J256BD64 is conductively connected, for 1PPS pulse signal to be sent to the master controller MCULPC54113J256BD64；The PIO0_6 pin conduction of its RXD1 pin and master controller MCULPC54113J256BD64 connect It connects, for receiving the instruction from master controller MCULPC54113J256BD64；Its TXD1 pin and master controller The PIO0_5 pin of MCULPC54113J256BD64 is conductively connected, after GPS module receives instruction, to master controller MCULPC54113J256BD64 sends the UTC time information that master controller MCULPC54113J256BD64 specifies data format.

8. it is according to claim 4 based on WiFi wirelessly with the distributed signal synchronous of GPS time service, feature It is: the USR-C216 wireless module using Jinan someone company of the WiFi module；Its RFIO pin is antenna letter Number input terminal；The PIO0_0 pin of its USRT0_TX pin and master controller MCULPC54113J256BD64 are conductively connected, and are used for The data received from the outside are sent to master controller MCULPC54113J256BD64；Its USRT0_RX pin and master control The PIO0_1 pin of device MCULPC54113J256BD64 is conductively connected, for sending out the data of the data collecting module collected It sees off；The PIO1_8 pin of its nReload pin and master controller MCULPC54113J256BD64 are conductively connected, by master control Device MCULPC54113J256BD64 processed configures WiFi network, drag down 0.5-3s starting Simple Config or Airkiss distribution drags down 3s or more factory reset；Its nLink pin is with master controller MCULPC54113J256BD64's PIO1_7 pin is conductively connected, which is WiFi module connection instruction pin；Its nReady pin and master controller The PIO1_9 pin of MCULPC54113J256BD64 is conductively connected, which indicates WiFi module instruction pin working properly.

9. it is according to claim 8 based on WiFi wirelessly with the distributed signal synchronous of GPS time service, feature Be: the connecting wire line width between the RFIO pin and antenna RF of the USR-C216 wireless module is carried out according to impedance matching Design.

10. it is according to claim 1 based on WiFi wirelessly with the distributed signal synchronous of GPS time service, it is special Sign is: the power management module includes rechargeable battery, battery charging unit, battery capacity detection unit and voltage conversion Unit, the battery charging unit use usb mode to charge for the rechargeable battery using BQ24092 as core chips； The electricity that the battery capacity detection unit is used to detect the rechargeable battery is filled using BQ27411 as core chips described When electric battery capacity is too low, electric signal is sent to the master controller MCU unit, institute is controlled by the master controller MCU unit It states GPS module, the WiFi module, the data acquisition module and enters stand-by operation state.