CN207083121U - A kind of networking of wired sensor network - Google Patents

Abstract

The utility model discloses a kind of networking of wired sensor network, by node autonomous exploration upstream and downstream node, organizes network, avoids manual input device number to organize network；In addition, the method for real-time data transmission, reduces the pressure brought of the delay and data concentration of transmissions of data to host computer；Carry out the integrality and reliability for the data that the mode of data storage ensures using chained list；The transmission of data is to transmit host computer request of data by upstream node in network, and the node sends the requests to next node again, and transmits the data of collection upwards；Such a method avoids each node of manual identification, improves the efficiency of networking；Node just transmits data when receiving request of data upwards, avoids and converges to finish node and concentrate situation about uploading, improves the real-time of system, by the reliability for DMA and the idle utilization interrupted, improving system data transmission.

Description

A kind of networking of wired sensor network

Technical field

A kind of networking is the utility model is related to, specially a kind of networking of wired sensor network, belongs to electric signal measurement With analysis technical field.

Background technology

With the continuous development of informationization, also there is a variety of, current sensor network master in the mode of sensor network transmission Data are wirelessly organized and transmit, its is convenient, flexible, and distributed areas are wide, but its presence is easily disturbed, loses number The shortcomings of according to bag；The problem of mode of wire transmission can avoid wireless transmission method from existing, its implementation can utilize string Mouth and other method are realized.

Prior art：Patent《A kind of MEMS inertial sensor network node and network transmission mode》Utilize serial ports Mode realizes wire transmission；Its data acquisition node realizes the wired connection of serial ports using two serial interfaces, one of them Interface is connected thereto trip node, and another connects node downstream；The most important feature of the program is, in the institute of this series connection Have in node, first node requires connect to host computer, and last node is also required to be connected on host computer, final to realize One loop configuration；So, host computer sends request of data equivalent to the driving center of loop configuration to first node, The data transfer of request and first node gives second node, with this downwards, when reaching last node, directly utilizes Another interface of host computer is sent to host computer, realizes cycling through for data；

Patent《A kind of wired sensor network construction system and method》Data are realized using RJ45 Ethernet interfaces Wire transmission.Its data acquisition node utilizes the upstream and downstream of two RJ45 interfaces, respectively connecting node, realizes wired company of node Connect；System identification each sensor of being mainly characterized by of the program is by the unique encodings in equipment, and this coding obtains Must be obtained by the code tag outside handheld device scanning sensor.Afterwards again in systems by each data with passing The Data Matching of sensor collection is with the source of identification data.

But the Data Over Cable resolving pressure used at present is big；When sensor distributed quantity is more, host computer one It is secondary to have received all the sensors data, when each node data is required for complicated algorithm to parse, will be caused to host computer compared with Big pressure；Data delay is longer；Because data in final node just upload the data of first node together, this for For first node, the delay for the increasing having resulted in, when the higher real-time of system requirements；Identification for data needs The unique EIC equipment identification code of each node is relied on, and the two-dimension code label on scan node that is obtained by of the identification code obtains, Then device code and data are bound together in host computer；When number of nodes is excessive, the process of networking will be extremely cumbersome, Reduce the efficiency of overall networking.

Utility model content

The purpose of this utility model is that to solve the above problems and provides a kind of networking of wired sensor network.

The utility model is achieved through the following technical solutions above-mentioned purpose, a kind of networking of wired sensor network, bag Include MCU, the MCU connections MAX1759, and MAX1759 connection CELL and USB interface 2；The CELL connections TP-4056, And the TP-4056 is connected with the USB interface 2；The USB interface 2 connects CP2102, and described in CP2102 connections MCU；The MCU is connected with firmware download interface；The CP2102 is provided with two, one of CP2102 connections usb 1.

Preferably, the USB interface 2 is used to communicate with father node, including receives the order of father node and sent out to father node Send data.

Preferably, the usb 1 is used to send order to child node and receives the data of child node.

Preferably, data, direct memory access data are transmitted by the way of DAM and the idle interruption of serial ports when transmitting data And store, periphery and internal memory, internal memory and internal memory directly transmit, and when the data transfer is complete, serial ports can send out a serial ports free time Interrupt；This interruption can when Serial Port Transmission is completed, i.e., by it is busy switch to the free time when trigger, but in the in general serial ports free time It can't trigger.

Preferably, for the MCU data processors by the way of linked queue, Head nodes are the head node of queue, Include two pointers and an integer variable；Two pointer variable clocks point to head and the afterbody of queue, integer variable record The length of queue, when reading a new data, program can apply for the space of a back end, and data duplication is entered Space, and node is added into queue, and the space of first node is discharged, ensure the length of queue；When wireless interrupt needs When reading data, the data of intermediate node are returned all the time.

The beneficial effects of the utility model are：The utility model organizes network by node autonomous exploration upstream and downstream node, Manual input device number is avoided to organize network；In addition, the method for real-time data transmission, delay and the data of data are reduced The pressure brought of the concentration of transmissions to host computer；Carry out the integrality of the data that the mode of data storage ensures and reliable using chained list Property；The transmission of data is to transmit host computer request of data by upstream node in network, and the node sends the requests to next again Individual node, and the data of collection are transmitted upwards；Such a method avoids each node of manual identification, improves the efficiency of networking； Meanwhile node just transmits data when receiving request of data upwards, avoid and converge to the feelings that finish node concentrates upload Condition, the real-time of system is improved, the chip that main control module uses is the wireless of reliable stabilization for STM32F407VGT6 Sensor network program and realize that data high-speed real-time storage provides quick computing and disposal ability, master control is built-in Jtag interface, can be downloaded and debugging routine by firmware download interface；The chip that USB turns serial port module is CP2102, uses it The RS232 agreements of the USART interfaces of sensor network nodes and the level conversion and Control on Communication of USB2.0 agreements can be completed Work；By to DMA and the idle utilization interrupted, it is possible to achieve the transmission of cable data, improve system data transmission Reliability；In addition as the alternative scheme being wirelessly transferred, it has more preferable jamproof performance.

Brief description of the drawings

Fig. 1 is sensor network nodes hardware system block diagram provided by the utility model；

Fig. 2 is wired networking schematic diagram provided by the utility model；

Fig. 3 is wired networking DFD provided by the utility model；

Fig. 4 is sensing data flow graph provided by the utility model；

Fig. 5 is node procedure flow chart provided by the utility model；

Fig. 6 is chained list organization chart provided by the utility model；

Fig. 7 is chained list interpolation data figure provided by the utility model.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belong to the scope of the utility model protection.

Refer to shown in Fig. 1-7, a kind of networking of wired sensor network, including MCU, the MCU connections MAX1759, And the MAX1759 connection CELL and USB interface 2；The CELL connections TP-4056, and the TP-4056 and USB connects Mouth 2 connects；The USB interface 2 connects CP2102, and the CP2102 connections MCU；The MCU is connected with firmware download Interface；The CP2102 is provided with two, one of CP2102 connections usb 1.

A kind of method of the data transfer of the networking of wired sensor network, its method and step include：

Step 1: node connects, first the USB interface 2 of hardware is used to be connected with father node；The usb 1 of hardware in Child node connects, and is sequentially connected, to the last a node；

Step 2: debugging routine, inputs program, and debugging routine in firmware download interface, sets the USB of each node The father node of interface 2, usb 1 are child node；

Step 3: host computer sends networking request, number is transmitted by the way of DAM and the idle interruption of serial ports when transmitting data According to；After first node receives the order of host computer, mark is father node in the program of oneself, and replys father's section Child node be present in point, i.e. host computer, host computer mark；Then first node sends another string of networking commands to oneself Mouthful, after its child node receives networking commands, there is father node in mark, and reply father node；Then it is again to it another Serial ports sends networking commands, the like, to the last a node terminates networking after waiting its child node to reply time-out；

Data are passed to by step 4, data processing, father node from USB interface 2, by main control module MCU processing, and are replied Child node be present in father node, i.e. host computer, host computer mark；Then first node sends commands to another string of oneself Mouthful, data are from firmware download interface downloading data.

In order to improve stability, hardware includes main control module, firmware download interface, usb 1, USB interface 2, turn string Mouth mold block, TP-4056 power management chips, CELL batteries, MAX-1759 voltage stabilizing chips, it is described turn serial port module chip be CP2102, the chip that the main control module uses is STM32F407VGT6.

In order to prevent that transmission time is long, the wire transmission mode of data transmits data using usb 1, USB interface 2； Wherein USB interface 2 is used to communicate with father node, including receives the order of father node and send data to father node；Usb 1 For sending order to child node and receiving the data of child node.

In order to prevent serial ports receives from interrupting loss of data, passed when transmitting data by the way of DAM and the idle interruption of serial ports Transmission of data, direct memory access (DMA) data and is stored, and periphery and internal memory, internal memory and internal memory directly transmit, and work as data transfer During completion, serial ports can send out the idle interruption of a serial ports；This interruption can switch to the free time when Serial Port Transmission is completed by busy When trigger, but can't be triggered in the in general serial ports free time.

In order to ensure to need to ensure the integrality of data, the MCU data processors by the way of linked queue, Head nodes are the head node of queue, include two pointers and an integer variable；Two pointer variable clocks point to queue Head and afterbody, integer variable record the length of queue, and when reading a new data, program can apply for a data section The space of point, data duplication is entered into space, and node is added into queue, and discharge the space of first node, ensure team The length of row；When wireless interruption needs to read data, the data of intermediate node are returned all the time.

It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and And in the case of without departing substantially from spirit or essential attributes of the present utility model, it can realize that this practicality is new in other specific forms Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation Involved claim.

Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art It is appreciated that other embodiment.

Claims (5)

1. a kind of networking of wired sensor network, including MCU, it is characterised in that the MCU connections MAX1759, and it is described MAX1759 connection CELL and USB interface 2；The CELL connections TP-4056, and the TP-4056 connects with the USB interface 2 Connect；The USB interface 2 connects CP2102, and the CP2102 connections MCU；The MCU is connected with firmware download interface； The CP2102 is provided with two, one of CP2102 connections usb 1.

2. the networking of wired sensor network according to claim 1, it is characterised in that the USB interface 2 is used for and father Node communication, including receive the order of father node and send data to father node.

3. the networking of wired sensor network according to claim 1, it is characterised in that the usb 1 is used for son Node sends order and receives the data of child node.

4. the networking of wired sensor network according to claim 1, it is characterised in that during transmission data using DAM and The idle mode interrupted of serial ports transmits data.

5. the networking of wired sensor network according to claim 1, it is characterised in that the MCU data processors By the way of linked queue, Head nodes are the head node of queue, include two pointers and an integer variable；Two pointers Variable clock points to the head of queue and afterbody, integer variable record the length of queue.