CN110677841A - Laboratory data management method and device based on Bluetooth topology network - Google Patents
Laboratory data management method and device based on Bluetooth topology network Download PDFInfo
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- CN110677841A CN110677841A CN201910978192.6A CN201910978192A CN110677841A CN 110677841 A CN110677841 A CN 110677841A CN 201910978192 A CN201910978192 A CN 201910978192A CN 110677841 A CN110677841 A CN 110677841A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/40—Connection management for selective distribution or broadcast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/16—Gateway arrangements
Abstract
The invention relates to a laboratory data management method and a device based on a Bluetooth topological network, wherein the method comprises the following steps: s1: constructing a Bluetooth topological network consisting of network nodes, gateways and a data management server which are connected in sequence, wherein each laboratory device is distributed with one network node; s2: each network node broadcasts the equipment data to a gateway through Bluetooth, the gateway transmits the equipment data to a data management server, and the data management server checks the equipment data of all laboratory equipment; each network node is provided with a main controller, Bluetooth and a local database, and is connected with other network nodes or gateways through the Bluetooth. Compared with the prior art, the invention has the advantages of wide network distribution range, high transmission speed, simple structure and the like.
Description
Technical Field
The invention relates to a short-distance wireless communication technology, in particular to a laboratory data management method and device based on a Bluetooth topological network.
Background
With the continuous improvement of the informatization level, the industrial internet of things is rapidly developed, and more traditional enterprises utilize the internet of things technology to improve the production efficiency and the product quality, so that the core competitiveness of the enterprises is improved. Most of traditional data transmission of the internet of things is based on wired transmission, such as RS232, RS485 and Ethernet, but the application scene of wired transmission is limited, the deployment difficulty is large, and on the contrary, the characteristics of easy installation, low cost and low power consumption of wireless transmission enable the traditional wired transmission mode to be gradually replaced.
The main problems of the existing laboratories, particularly the chemical laboratories, are as follows: data generated in most experimental periods are manually recorded, so that the workload is high, and the error rate is high; most of data detected by digital equipment can only be displayed at a local end or copied by equipment such as a U disk after a test is finished, real-time monitoring of the data cannot be realized, and meanwhile, the data storage time is limited, so that historical data cannot be traced; many laboratory facilities need be equipped with a computer specially in order to look over real-time test data, and is with high costs, can't fuse the integrated management of multiple equipment data simultaneously, and data analysis is single.
The prior art also presents some solutions to the above-mentioned problems. Chinese patent CN105357626A proposes an intelligent management system and method for experimental devices based on bluetooth technology, the system is composed of bluetooth modules, mobile terminals, an intelligent gateway and a central server, the central server is responsible for the management of the intelligent gateway, the connection is established between the server and the mobile terminals, each laboratory center is equipped with a bluetooth master module, each experimental device is equipped with a bluetooth slave module, the master module scans the slave modules at regular time, the gateway sends the device information collected by the master module to the server, and the device information is checked through the terminal connected with the server.
This patent passes through bluetooth module transmission experimental facilities's information, and bluetooth module connects and transmission speed is fast, practices thrift manpower resources, breaks through the space-time restriction, and the user can obtain experimental facilities real-time information anytime and anywhere, can realize experimental facilities's removal, increase and delete simultaneously.
However, the patent has the following disadvantages:
in the system provided by the patent, each laboratory is provided with a bluetooth master module, each laboratory device is provided with a bluetooth slave module, the bluetooth master module is directly connected with a gateway, because the transmission distance of bluetooth is limited, a plurality of gateways are required to be simultaneously provided to ensure the connection to each bluetooth master module, and simultaneously, each bluetooth slave module is also connected with the bluetooth master module respectively.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a laboratory data management method and device based on a Bluetooth topological network.
The purpose of the invention can be realized by the following technical scheme:
a laboratory data management method based on a Bluetooth topological network comprises the following steps:
s1: the method comprises the steps that a Bluetooth topological network formed by sequentially connected network nodes, gateways and a data management server is built, each laboratory device in the Bluetooth topological network is distributed with one network node, each network node comprises a main controller, Bluetooth and a local database, each network node is connected with at least one other network node in a Bluetooth mode, and each gateway is connected with at least one network node in a Bluetooth mode;
the main controller working modes comprise a broadcast mode and a relay mode;
the main controller in the broadcast mode controls the Bluetooth to outwards play local equipment data corresponding to the laboratory equipment, the local equipment data are stored in a local database, and the main controller in the relay mode controls the Bluetooth to rebroadcast the data of the foreign equipment received by the network node Bluetooth;
s2: each network node broadcasts the equipment data through Bluetooth, finally the equipment data of all the test equipment is transmitted to a gateway, the equipment data received by the gateway is subjected to redundancy removal processing and then transmitted to a data management server, and the equipment data of all the laboratory equipment is checked through a terminal connected with the data management server;
further, the network node periodically selects the working mode by modifying the standard bluetooth protocol stack, specifically the process is as follows:
s201: the network node detects whether the local database has unplayed local equipment data, if so, the network node enters a broadcast mode, otherwise, the network node enters a relay mode;
s202: and after the network node enters any one of the working modes to a set period, repeating the step S201.
Further, when receiving the data of the foreign device, the main controller or the gateway may simultaneously play a reception confirmation instruction, and each network node repeatedly broadcasts the corresponding local device data or the data of the foreign device until receiving the corresponding reception confirmation instruction;
if the network node receives the local device data or the foreign device data broadcasted by the network node before, the network node does not broadcast and does not play a receiving confirmation instruction.
Furthermore, the network nodes comprise a plurality of relay nodes, the relay nodes are network nodes of which the main controller is always in a relay mode, the data transmission blockage of equipment caused by too many network nodes of which the main controller is in a broadcast mode is avoided, and the transmission rate is accelerated;
in the Bluetooth topological network, each network node is connected with at least one relay node in a Bluetooth mode, each relay node is connected with at least one relay node in another Bluetooth mode, and each gateway is connected with at least one relay node in a Bluetooth mode, so that the smoothness of a device data transmission path of the Bluetooth topological network is guaranteed.
A laboratory data management device based on a Bluetooth topological network comprises a network node module, a gateway and a data management server which are sequentially connected, wherein the network node module is provided with a network node correspondingly on each laboratory device, the network node comprises a main controller, Bluetooth and a local database, the device data of each laboratory device is collected by the main controller and transmitted to the gateway by the Bluetooth, and the gateway performs redundancy removal processing on all the device data and transmits the data to the data management server for connection;
the Bluetooth of each network node is connected with other network nodes or gateways;
the working modes of the main controller comprise a broadcast mode and a relay mode:
the main controller in the broadcast mode controls the Bluetooth to play local equipment data corresponding to the laboratory equipment outwards;
the main controller in the relay mode controls the Bluetooth to relay the data of the foreign device received by the Bluetooth;
the local device data is stored in a local database.
Further, the network node periodically selects a working mode, specifically, the process is as follows:
s701: the main controller detects whether the local data of the unplayed local equipment exists in the local database, if so, the main controller enters a broadcasting mode, otherwise, the main controller enters a relay mode;
s702: and the main controller repeats the step S701 after entering any one working mode to the set period duration.
Further, when receiving the data of the foreign device, the bluetooth of the network node or the gateway may simultaneously play a reception confirmation instruction, and the network node repeatedly broadcasts the corresponding local device data or the data of the foreign device until receiving the corresponding reception confirmation instruction;
if the network node receives the local device data or the foreign device data broadcasted by the network node before, the network node does not broadcast and does not play a receiving confirmation instruction.
Further, the network nodes comprise a plurality of relay nodes, and the relay nodes are network nodes of which the main controller is always in a relay mode.
Further, the main controller adopts an industrial internet of things interface to be connected with laboratory equipment, and the industrial internet of things interface comprises RS232 and RS 485.
Compared with the prior art, the invention has the following beneficial effects:
(1) the Bluetooth topological network is formed by sequentially connecting network nodes, gateways and a data management server, each laboratory device is distributed with one network node, each network node is provided with Bluetooth, each network node is connected with other network nodes or gateways through Bluetooth, and a multipoint-to-multipoint transmission structure is adopted;
(2) the network node is provided with a main controller and a local database, the main controller switches working modes by modifying a standard Bluetooth protocol stack of Bluetooth in the network node, the working modes comprise a broadcasting mode and a relay mode, the network node in the broadcasting mode broadcasts new local equipment data in the local database, the network node in the relay mode is a relay node, and only broadcasts equipment data broadcasted by other network nodes, so that smoothness of a transmission channel is ensured, the network node flexibly switches the working modes according to whether the local database has the new local equipment data, the equipment data of the local database and the equipment data of other network nodes are uploaded in time, and the transmission efficiency and the timeliness of a Bluetooth topological network are improved;
(3) the invention can freely set the number and the positions of the relay nodes and the gateways, so that the Bluetooth topological network has no information isolated island, the Bluetooth topological network has low arrangement difficulty, and the number of the gateways and transmission channels of equipment data are reduced, thereby reducing the arrangement cost of the Bluetooth topological network and the network overhaul cost.
Drawings
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a schematic diagram of the operating mode of the main controller;
FIG. 3 is a schematic diagram of the system of the present invention;
fig. 4 is a schematic diagram of a network node structure according to the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example one
A method for managing laboratory data based on bluetooth topology network, as shown in fig. 1, applied in a laboratory, especially a chemical laboratory, comprising:
s1: the method comprises the steps that a Bluetooth topological network formed by sequentially connected network nodes, gateways and a data management server is built, each laboratory device in the Bluetooth topological network is distributed with one network node, each network node comprises a main controller, Bluetooth and a local database, each network node is connected with at least one other network node in a Bluetooth mode, and each gateway is connected with at least one network node in a Bluetooth mode;
as shown in fig. 2, the main controller operation mode includes a broadcast mode and a relay mode;
the main controller in the broadcast mode controls the Bluetooth to outwards play local equipment data corresponding to the laboratory equipment, the local equipment data are stored in a local database, and the main controller in the relay mode controls the Bluetooth to rebroadcast the data of the foreign equipment received by the network node Bluetooth;
in the Bluetooth topological network, each network node is connected with at least one relay node in a Bluetooth mode, each relay node is connected with at least one relay node in another Bluetooth mode, and each gateway is connected with at least one relay node in a Bluetooth mode, so that the smoothness of a device data transmission path of the Bluetooth topological network is guaranteed;
s2: each network node broadcasts the equipment data through Bluetooth, finally the equipment data of all the test equipment is transmitted to a gateway, the equipment data received by the gateway is subjected to redundancy removal processing and then transmitted to a data management server, and the equipment data of all the laboratory equipment is checked through a terminal connected with the data management server;
the network node periodically selects a working mode by modifying a standard Bluetooth protocol stack, and the specific process is as follows:
s201: the network node detects whether the local database has unplayed local equipment data, if so, the network node enters a broadcast mode, otherwise, the network node enters a relay mode;
s202: after the network node enters any one of the operating modes to the set period duration, step S201 is repeated.
When receiving the data of the foreign equipment, the main controller or the gateway simultaneously plays a receiving confirmation instruction, and each network node repeatedly broadcasts the corresponding local equipment data or the data of the foreign equipment until receiving the corresponding receiving confirmation instruction;
if the network node receives the local device data or the foreign device data broadcasted by the network node before, the network node does not broadcast and does not play a receiving confirmation instruction.
The network nodes comprise a plurality of relay nodes, the relay nodes are the network nodes of which the main controller is always in a relay mode, the data transmission blockage of equipment caused by the excessive network nodes of which the main controller is in a broadcast mode is avoided, and the transmission rate is accelerated;
example two
A laboratory data management apparatus based on bluetooth topology network corresponding to an embodiment, as shown in fig. 3, includes a network node module, a gateway, and a data management server, which are connected in sequence, where the bluetooth of the network nodes A, B, C and D are connected with other network nodes or gateways, the gateway performs redundancy removal processing on all device data and transmits the data to the data management server, so as to ensure the uniqueness of the same device data, and the monitoring terminal remotely monitors the laboratory device data through the data management server.
The experimental equipment monitored by the embodiment is a balance and a paperless recorder of a chemical laboratory,
the present embodiment uses a 5V/1A power adapter to power the gateway, which is deployed in the appropriate location.
As shown in fig. 4, the network node includes a main controller, which includes ARM and Flash, bluetooth, and a local database.
The network node module is correspondingly provided with a network node on each laboratory device, each laboratory device comprises an interface receiving balance and a paperless recorder, Flash of the main controller receives local device data of each laboratory device through an industrial Internet of things interface and carries out preprocessing, the preprocessing comprises effective data extraction, coding data conversion, data compression and the like, the preprocessed local device data are stored in a local database, the industrial Internet of things interface comprises RS232 and RS485, and the laboratory devices with limited peripheral interfaces can share one data output port.
The balance actively reports data after measurement is completed, the main controller takes out weight data after receiving the data and stores the weight data at a local end, and the data of the paperless recorder needs to be continuously inquired and obtained by the main controller, so that the inquiry period of the main controller needs to be set.
The working modes of the main controller comprise a broadcast mode and a relay mode, and the broadcasting mode and the relay mode are realized by modifying a standard Bluetooth protocol stack through ARM.
The main controller in the broadcast mode controls the Bluetooth to outwards play local equipment data corresponding to the laboratory equipment, and the main controller in the relay mode controls the Bluetooth to rebroadcast the data of the foreign equipment received by the Bluetooth;
the network node periodically selects a working mode, specifically the process is as follows:
s701: the main controller detects whether the local data which is not played exists in the local database, if so, the main controller enters a broadcasting mode, otherwise, the main controller enters a relay mode;
s702: and the main controller repeats the step S701 after entering any one working mode to the set period duration.
When receiving the data of the foreign device, the Bluetooth of the network node or the gateway can simultaneously play a receiving confirmation instruction, and the network node repeatedly broadcasts the corresponding local device data or the data of the foreign device until receiving the corresponding receiving confirmation instruction;
if the network node receives the local device data or the foreign device data broadcasted by the network node before, the network node does not broadcast and does not play a receiving confirmation instruction.
When the controllers of the network nodes B and C are in the broadcast mode, the network node D can receive the equipment data broadcast by the network node A, and the data transmission is prevented from being blocked and slowed.
The first embodiment and the second embodiment provide a laboratory data management method and device based on a bluetooth topology network, the method constructs a Bluetooth topological network consisting of network nodes, gateways and a data management server which are connected in sequence, adopts a multipoint-to-multipoint transmission structure to enlarge the transmission range of the Bluetooth topological network, the network nodes flexibly switch the working modes according to whether a local database has new local equipment data, the working modes comprise a broadcasting mode and a relay mode, wherein the network node in the broadcasting mode broadcasts new local equipment data in the local database, the network node in the relay mode, namely the relay node, only relays the equipment data broadcasted by other network nodes, meanwhile, the number and the positions of the relay nodes and the gateways can be freely set, the transmission range of the Bluetooth topology network is expanded, the transmission efficiency is improved, and the cost and the difficulty of arrangement and maintenance are reduced.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A laboratory data management method based on a Bluetooth topological network comprises the following steps:
s1: constructing a Bluetooth topological network consisting of network nodes, gateways and a data management server which are connected in sequence, wherein each laboratory device is distributed with one network node;
s2: each network node broadcasts the equipment data to a gateway through Bluetooth, the gateway transmits the equipment data to a data management server, and the data management server checks the equipment data of all laboratory equipment;
the Bluetooth topology network is characterized in that each network node is provided with a main controller, Bluetooth and a local database, and each network node is connected with other network nodes or gateways through the Bluetooth;
the working modes of the main controller comprise a broadcast mode and a relay mode:
the main controller in the broadcast mode controls the Bluetooth to play local equipment data corresponding to the laboratory equipment outwards;
the main controller in the relay mode controls the Bluetooth to relay the data of the foreign device received by the Bluetooth;
the local device data is stored in a local database.
2. The laboratory data management method based on the bluetooth topology network according to claim 1, wherein the master controller periodically selects an operation mode, specifically comprising the following steps:
s201: the main controller detects whether the local data of the unplayed local equipment exists in the local database, if so, the main controller enters a broadcasting mode, otherwise, the network node enters a relay mode;
s202: and after the main controller enters any one working mode to set the period duration, repeating the step S201.
3. The method according to claim 2, wherein the bluetooth of each network node or gateway broadcasts the reception confirmation command when receiving the data of the foreign device, and the bluetooth of each network node repeatedly broadcasts the corresponding data of the local device or the data of the foreign device until receiving the corresponding reception confirmation command;
if the network node receives the local device data or the foreign device data broadcasted by the network node before, the network node does not broadcast and does not play a receiving confirmation instruction.
4. The method as claimed in claim 1, wherein the network nodes include a plurality of relay nodes, and the relay nodes are network nodes in which the master controller is always in a relay mode.
5. The method of claim 1, wherein the gateway performs de-redundancy processing on the received device data.
6. A laboratory data management device based on a Bluetooth topological network comprises a network node module, a gateway and a data management server which are sequentially connected, wherein the network node module is provided with a network node on each laboratory device correspondingly, the network node comprises a main controller and Bluetooth, the device data of each laboratory device is collected by the main controller and transmitted to the gateway by the Bluetooth, and the gateway transmits all the device data to the data management server;
the working modes of the main controller comprise a broadcast mode and a relay mode:
the main controller in the broadcast mode controls the Bluetooth to play local equipment data corresponding to the laboratory equipment outwards;
the main controller in the relay mode controls the Bluetooth to relay the data of the foreign device received by the Bluetooth;
the local device data is stored in a local database.
7. The laboratory data management device based on bluetooth topology network according to claim 6, wherein the network node periodically selects an operation mode, specifically comprising the following processes:
s701: the main controller detects whether the local data of the unplayed local equipment exists in the local database, if so, the main controller enters a broadcasting mode, otherwise, the main controller enters a relay mode;
s702: and the main controller repeats the step S701 after entering any one working mode to the set period duration.
8. The method according to claim 7, wherein when receiving the data of the foreign device, the bluetooth of the network node or gateway simultaneously plays the reception confirmation command, and the network node repeatedly broadcasts the corresponding local device data or the corresponding foreign device data until receiving the corresponding reception confirmation command;
if the network node receives the local device data or the foreign device data broadcasted by the network node before, the network node does not broadcast and does not play a receiving confirmation instruction.
9. The method as claimed in claim 1, wherein the network nodes include a plurality of relay nodes, and the relay nodes are network nodes in which the master controller is always in relay mode.
10. The method of claim 1, wherein the gateway performs de-redundancy processing on the received device data.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111948962A (en) * | 2020-07-14 | 2020-11-17 | 深圳市优必选科技股份有限公司 | Robot synchronization control method and device |
| CN113259916A (en) * | 2020-02-12 | 2021-08-13 | 阿里巴巴集团控股有限公司 | Communication method based on Bluetooth network, node and communication system thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105357626A (en) * | 2015-11-04 | 2016-02-24 | 南京邮电大学 | Experimental equipment intelligent management system based on Bluetooth technology and implementation method |
| CN110024478A (en) * | 2016-12-23 | 2019-07-16 | 英特尔公司 | Adaptivity network topology structure |
-
2019
- 2019-10-15 CN CN201910978192.6A patent/CN110677841A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105357626A (en) * | 2015-11-04 | 2016-02-24 | 南京邮电大学 | Experimental equipment intelligent management system based on Bluetooth technology and implementation method |
| CN110024478A (en) * | 2016-12-23 | 2019-07-16 | 英特尔公司 | Adaptivity network topology structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113259916A (en) * | 2020-02-12 | 2021-08-13 | 阿里巴巴集团控股有限公司 | Communication method based on Bluetooth network, node and communication system thereof |
| CN111948962A (en) * | 2020-07-14 | 2020-11-17 | 深圳市优必选科技股份有限公司 | Robot synchronization control method and device |
| CN111948962B (en) * | 2020-07-14 | 2022-02-22 | 深圳市优必选科技股份有限公司 | Robot synchronization control method and device |
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