CN104394218A - Distributed acquisition system powered by communication bus - Google Patents
Distributed acquisition system powered by communication bus Download PDFInfo
- Publication number
- CN104394218A CN104394218A CN201410697886.XA CN201410697886A CN104394218A CN 104394218 A CN104394218 A CN 104394218A CN 201410697886 A CN201410697886 A CN 201410697886A CN 104394218 A CN104394218 A CN 104394218A
- Authority
- CN
- China
- Prior art keywords
- relay
- power supply
- acquisition module
- bus
- host computer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40045—Details regarding the feeding of energy to the node from the bus
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/10—Current supply arrangements
Abstract
The invention discloses a distributed acquisition system powered by a communication bus. The system comprises an RS485 bus (1), an upper computer (2), a direct-current power source (3) and acquisition modules (4); a program control time sharing switching method is adopted, and the RS485 bus is used for charging the super capacitors of all the acquisition modules to supply power for the acquisition modules during communication, and therefore, the dependency on power supply is avoided; no AC power and DC power are needed and frequency battery changing is also avoided, and the requirements of any environment and occasion are met; no external power source and RS485 differential voltage are required, the number of the RS485 modules utilized is not limited, and the RS485 bus application system of maximum 128 acquisition modules can be completely supported.
Description
Technical field
The present invention relates to a kind of distributed parallel computing environment, particularly relate to a kind of distributed parallel computing environment that power supply is provided by communication bus.
Background technology
Utilize the distributed parallel computing environment of RS485 bus design to have application in a lot of field at present, its structure chart as shown in Figure 1, comprises RS485 bus, host computer and acquisition module.Its operation principle is: host computer (usually adopting PC) sends corresponding address and order of fetching data by RS485 to a certain acquisition module or certain several acquisition module, when module's address meets the requirements, acquisition module is by multi-channel a/d converter image data and transmit data by RS485 bus to host computer.Will there is following problem like this: each acquisition module needs a DC power supply, the people also corresponding following methods that takes solve:
1) adopt AC power, through Power convert, thus provide direct current to supply;
2) battery-powered;
3) increase by two direct current supply lines to power;
4) utilize RS485 to there is differential voltage, recycle a boosting integrated circuit and this differential voltage is amplified, for application system;
But above-mentioned solution cannot be applied to some occasion, such as, under wild environment, near acquisition module, there is no alternating current, therefore said method 1) cannot adopt; If adopt said method 2) battery-powered, cost compare is high, and changes trouble; Adopt said method 3) increase by two direct current supply lines power, in remote situation, considerably increase cost; And adopt said method 4) time, when RS485 bus is connected to multiple acquisition module (most application is all many), differential voltage can be caused to reduce, affect the correctness of the data utilizing RS485 to transmit, when utilizing RS485 bus, nodes reaches at most 128, institute in method 4) cannot adopt.
Therefore, the supply power mode improving the bus distributed acquisition system of RS485 has great importance to its application places or environmental requirement.The present invention proposes a kind of distributed parallel computing environment that power supply is provided by communication bus, adopt the method that program control timesharing switches, at host computer and acquisition module, one relay is set respectively, for the switching of DC power supply and RS485 communication signal, realize first utilizing the super capacitor of RS485 bus to all acquisition modules of system to charge, again by program control host computer and all acquisition module precise synchronizations, undertaken gathering and result being uploaded to host computer by acquisition module.
By the time controling that program is charged to acquisition module, the time of acquisition module for gathering, and each acquisition module is uploaded Information Monitoring successively and will very accurately be controlled to host computer etc., thus improve the efficiency of system; The information that when accurate synchronization control function is for ensureing to upload, each acquisition module transmits can not clash.
Summary of the invention
The invention provides a kind of distributed parallel computing environment that power supply is provided by communication bus, adopt the method that timesharing switches, adopt and one relay is set respectively at host computer and acquisition module, for the switching of DC power supply and RS485 communication signal, and utilize super capacitor before communication, store DC power supply electric energy, during communication, it can provide power supply for the terminal equipment (acquisition module) of RS485 bus, achieves acquisition module oneself function of supplying power, does not need additional power source.
For achieving the above object, the technical solution used in the present invention is:
The present invention provides the distributed parallel computing environment of power supply to comprise RS485 bus, host computer by communication bus, DC power supply and multiple acquisition module; Described host computer comprises the first relay, and described first relay is for the switching of control RS485 bus between being connected with described DC power supply and being connected with the RS485 interface of described host computer; Described acquisition module also comprises super capacitor, direct current stabilizer, the second relay and isolating diode, and described direct current stabilizer, described isolating diode are connected successively with described super capacitor; Described super capacitor and described acquisition module are connected in parallel; The first relay described in the second described relay coordinates, for the switching of control RS485 bus between being connected with described direct current stabilizer and being connected with the RS485 interface of described acquisition module.
Described direct current stabilizer is arranged at the front end of isolating diode, for the output voltage of stable described DC power supply, described isolating diode is arranged at the front end of described super capacitor, oppositely runs off for preventing the electric energy of super capacitor.
Described first relay is for controlling described RS485 bus switching between being connected with described DC power supply and being connected with the RS485 interface of described host computer: the first described relay is by an I/O mouth line traffic control of described host computer, before communication, described first relay is switched to and is connected with described DC power supply, and two differential signal lines realizing described RS485 bus connect the both positive and negative polarity of described DC power supply; When communication, described first relay is switched to and is connected with the RS485 interface of described host computer, and two differential signal lines realizing described RS485 bus connect the RS485 interface of described host computer.
The first relay described in described second relay coordinates, for control RS485 bus switching between being connected with direct current stabilizer and being connected with the RS485 interface of acquisition module: the second described relay is by an I/O mouth line traffic control of described acquisition module, before communication, described second relay is switched to and is connected with described direct current stabilizer, realize described DC power supply by described first relay, described RS485 bus, described second relay, described direct current stabilizer and described isolating diode charge to described super capacitor, simultaneously, also can power to acquisition module and make acquisition module work, when communication, described second relay is switched to and is connected with the RS485 interface of described acquisition module, realizes the communication of described host computer by described first relay, described RS485 bus and described second relay and described acquisition module.
Described host computer has Control function, can realize the control switched described first relay by I/O mouth line.
Described acquisition module has Control function, can realize the control switched described second relay by I/O mouth line.
Described acquisition module is several.
Compared with prior art, the beneficial effect that the present invention has is:
1) acquisition system of the present invention adopts the method that program control timesharing switches, and utilizes the super capacitor of RS485 bus to all acquisition modules of system to charge, for acquisition module during communication is powered, avoids the dependence to power supply.
2) RS485 of the present invention does not need alternating current and direct current, often need not change battery, meets the demand of any environment and occasion.
3) the present invention only needs to utilize existing two RS485 bus time-sharings to serve as direct current supply line and order wire, do not need additional power source, do not need to utilize RS485 differential voltage yet, use the quantity of RS485 module unrestricted, the RS485 bus application system of maximum 128 acquisition modules can be supported completely.
Accompanying drawing explanation
Fig. 1 is the structural representation of the distributed parallel computing environment of prior art RS485 bus design;
Fig. 2 to provide the structural representation of the distributed parallel computing environment of power supply by communication bus for the present invention.
In figure: 1, RS485 bus, 2, host computer, the 21, first relay, 3, DC power supply, 4, acquisition module, 41, super capacitor, 42, direct current stabilizer, the 43, second relay, 5, isolating diode.
Embodiment
As shown in Figure 2, below in conjunction with accompanying drawing, the invention will be further described.
Acquisition system of the present invention comprises a host computer (PC) 2, a n acquisition module 4(can reach 128 at most), DC power supply 3, first relay 21, second relay 43, RS485 bus 1, direct current stabilizer 42, super capacitor 41 and isolating diode 5.
Described DC power supply 3 exports+12V, and acquisition module 4 needs+5V to power, and each acquisition module has 8 A/D interfaces (16), and each A/D conversion needs 50ms, and RS485 communication baud rate is 9600, and system works is spaced apart 10 minutes.
The course of work of system is: each arrives for 10 minutes, host computer 2 controls the first relay 21, connect DC power supply 3, charged 2 minutes to n acquisition module 4 by RS485 bus, after each acquisition module 4 obtains+12V direct current by RS485 bus 1, be converted to+5V the working power of acquisition module needs by direct current stabilizer 42, charge to super capacitor 41 simultaneously; When acquisition module obtains+5V working power, start timer and start to carry out data acquisition, and by collection result stored in the RAM carried, 8 road A/D need 8 × 50ms=400ms altogether, are far smaller than 2 minutes.2 minute charging interval arrived, host computer 2 controls the first relay 21, connect RS485 bus 1 to host computer 2(PC machine) communication interface, each acquisition module 4 obtains 2 minutes to information according to the timer of oneself, and control relay 43 connects acquisition module 4 to host computer 2(PC machine) communication interface.In order to ensure that n acquisition module 4 uploading data can not produce conflict in RS485 bus 1, first broadcast mode is adopted, to m acquisition module 4(m≤n) send the order of a synchronous receiving data, after each acquisition module 4 receives this order, according to the number order that each acquisition module 4 self is arranged, successively by RS485 bus 1, with the speed of 9600 baud rates, upload all data collected to host computer 2.
Time Calculation: each acquisition module 4 has 8 16 A/D converters, take 16 bytes altogether, baud rate 9600, i.e. 960 bytes per second, 16 bytes transmit and need the <20ms time altogether, and 128 acquisition modules need time <3 second altogether.In order to ensure the reliability of transfer of data, between each acquisition module 4 uploading data, add 1 second interval, totally 128 seconds.Total time <3 minute.
When each acquisition module 4 timer was by 8 minutes, control relay 43 connects RS485 bus 1 to direct current stabilizer 42, for next one work is prepared.
Utilize the present invention, only need to utilize existing two RS485 bus time-sharings to serve as direct current supply line and order wire, can not need to provide interchange, DC power supply to acquisition module 4, do not need powered battery, do not need to utilize RS485 to there is differential voltage yet, recycle a boosting integrated circuit this differential voltage to be amplified, for acquisition module 4.Particularly be applied in field, without alterating and direct current, the occasion changing battery inconvenience.
Claims (7)
1. provide a distributed parallel computing environment for power supply by communication bus, it is characterized in that, this system comprises RS485 bus (1), host computer (2), DC power supply (3) and acquisition module (4); Described host computer (2) comprises the first relay (21), and described first relay (21) is for the switching of control RS485 bus (1) between described DC power supply (3) and the RS485 interface of described host computer (2); Described acquisition module (4) also comprises super capacitor (41), direct current stabilizer (42), the second relay (43) and isolating diode (5), and described direct current stabilizer (42), described isolating diode (5) are connected successively with described super capacitor (41); Described super capacitor (43) and described acquisition module (4) are connected in parallel; The first relay (21) described in described the second relay (43) coordinates, for the switching of control RS485 bus between described direct current stabilizer (42) and the RS485 interface of described acquisition module (4).
2. the distributed parallel computing environment that power supply is provided by communication bus according to claim 2, it is characterized in that the direct current stabilizer (42) by described is arranged at the front end of isolating diode (5), for the output voltage of stable described DC power supply (3), described isolating diode (5) is arranged at the front end of described super capacitor (41), oppositely runs off for preventing the electric energy of super capacitor (41).
3. the distributed parallel computing environment that power supply is provided by communication bus according to claim 1, it is characterized in that described first relay (21) is for controlling described RS485 bus (1) switching between being connected with described DC power supply (3) and being connected with the RS485 interface of described host computer (2): described the first relay (21) is by an I/O mouth line traffic control of described host computer (2), before communication, described first relay (21) is switched to and is connected with described DC power supply (3), two differential signal lines realizing described RS485 bus (1) connect the both positive and negative polarity of described DC power supply (3), when communication, described first relay (21) is switched to and is connected with the RS485 interface of described host computer (2), and two differential signal lines realizing described RS485 bus (1) connect the RS485 interface of described host computer (2).
4. the distributed parallel computing environment that power supply is provided by communication bus according to claim 2, it is characterized in that the first relay (21) described in the cooperation of described second relay (43), for control RS485 bus (1) switching between being connected with direct current stabilizer (42) and being connected with the RS485 interface of acquisition module (3): described the second relay (43) is by an I/O mouth line traffic control of described acquisition module, before communication, described second relay (43) is switched to and is connected with described direct current stabilizer (42), realize described DC power supply (3) by described first relay (21), described RS485 bus, described second relay (43), described direct current stabilizer (42) and described isolating diode (5) charge to described super capacitor (41), simultaneously, also acquisition module work can be made to acquisition module (4) power supply, when communication, described second relay (43) is switched to and is connected with the RS485 interface of described acquisition module (4), realizes described host computer (2) by the communication with described acquisition module (4) of described first relay (21), described RS485 bus and described second relay (43).
5. the distributed parallel computing environment providing power supply by communication bus according to claim 3, is characterized in that described host computer (2) has Control function, can realize the control switched described first relay (21) by I/O mouth line.
6. the distributed parallel computing environment providing power supply by communication bus according to claim 4, is characterized in that described acquisition module (4) has Control function, can realize the control switched described second relay (43) by I/O mouth line.
7. the distributed parallel computing environment providing power supply by communication bus according to claim 1 or 4, is characterized in that described acquisition module is for several.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410697886.XA CN104394218B (en) | 2014-11-28 | 2014-11-28 | A kind of distributed parallel computing environment that power supply is provided by communication bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410697886.XA CN104394218B (en) | 2014-11-28 | 2014-11-28 | A kind of distributed parallel computing environment that power supply is provided by communication bus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104394218A true CN104394218A (en) | 2015-03-04 |
| CN104394218B CN104394218B (en) | 2018-05-22 |
Family
ID=52612053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410697886.XA Active CN104394218B (en) | 2014-11-28 | 2014-11-28 | A kind of distributed parallel computing environment that power supply is provided by communication bus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104394218B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352111A (en) * | 2015-10-10 | 2016-02-24 | 珠海格力电器股份有限公司 | Control method and device and air conditioner mainboard |
| CN110034937A (en) * | 2018-01-12 | 2019-07-19 | 浙江宇视科技有限公司 | A kind of network cable power supply unit and system based on time-sharing multiplex |
| CN111327114A (en) * | 2020-03-11 | 2020-06-23 | 瑞纳智能设备股份有限公司 | MBUS bus power supply system and multi-slave node load balancing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030101270A1 (en) * | 2001-11-28 | 2003-05-29 | Thomas Heptner | Simple and secure method for blocking data records from CGI scripts |
| CN201266434Y (en) * | 2008-10-14 | 2009-07-01 | 浙江大学 | Isolation type bus power supply communication system |
| CN103888332A (en) * | 2014-02-25 | 2014-06-25 | 深圳市瑞雷特电子技术有限公司 | Communication bus and communication nodes |
-
2014
- 2014-11-28 CN CN201410697886.XA patent/CN104394218B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030101270A1 (en) * | 2001-11-28 | 2003-05-29 | Thomas Heptner | Simple and secure method for blocking data records from CGI scripts |
| CN201266434Y (en) * | 2008-10-14 | 2009-07-01 | 浙江大学 | Isolation type bus power supply communication system |
| CN103888332A (en) * | 2014-02-25 | 2014-06-25 | 深圳市瑞雷特电子技术有限公司 | Communication bus and communication nodes |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352111A (en) * | 2015-10-10 | 2016-02-24 | 珠海格力电器股份有限公司 | Control method and device and air conditioner mainboard |
| CN105352111B (en) * | 2015-10-10 | 2018-09-07 | 珠海格力电器股份有限公司 | Control method, device and air-conditioning mainboard |
| CN110034937A (en) * | 2018-01-12 | 2019-07-19 | 浙江宇视科技有限公司 | A kind of network cable power supply unit and system based on time-sharing multiplex |
| CN111327114A (en) * | 2020-03-11 | 2020-06-23 | 瑞纳智能设备股份有限公司 | MBUS bus power supply system and multi-slave node load balancing method |
| CN111327114B (en) * | 2020-03-11 | 2023-02-03 | 瑞纳智能设备股份有限公司 | MBUS bus power supply system and multi-slave node load balancing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104394218B (en) | 2018-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103162372B (en) | Air-conditioner and RS485 bus system thereof and bus system control method | |
| CN104394218A (en) | Distributed acquisition system powered by communication bus | |
| CN204776063U (en) | Wired power supply system of many rotor unmanned aerial vehicle | |
| CN105207284A (en) | Power supply method of master equipment to slave equipment and master equipment | |
| CN105610231A (en) | Implementation method of direct-current power system | |
| CN204089806U (en) | Low-power consumption main frame MBUS receives and dispatches control circuit | |
| CN205283260U (en) | Online monitored control system of power module based on cloud ware | |
| CN103945511B (en) | Control method and sensor node with sensors turned on and off in time-sharing mode | |
| CN203707843U (en) | Compound-type electric automobile power supply management system | |
| CN202997990U (en) | Switch reluctance motor controller | |
| CN202602386U (en) | Laser power transmission device | |
| CN202931016U (en) | Hybrid power supply inversion power supply | |
| CN204992647U (en) | Solar energy control of charge and discharge system | |
| CN104215991A (en) | Animal movement state monitor based on gyroscopic sensor, and monitoring method thereof | |
| CN205304414U (en) | Induction electricity -taking device in tunnel | |
| CN203691004U (en) | Charging device formed by network vehicle-borne charger set | |
| CN212909560U (en) | Bus sensor | |
| CN209326625U (en) | A kind of communication of insulator chain obliquity sensor and power supply device | |
| CN202840585U (en) | Charger system and rail vehicle | |
| CN204423131U (en) | A kind of Intelligent office delivery system based on Internet of Things | |
| CN201315600Y (en) | Ethernet network device | |
| CN202772644U (en) | Acquisition system terminal power supply management circuit | |
| CN204143614U (en) | For the wireless signal forward relay device of wireless temperature-measuring sensor | |
| CN215494050U (en) | Use power down detection device on filling electric pile | |
| CN203165202U (en) | Energy-saving type heat meter data acquisition device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |