CN201629041U - Remote meter reading communication system - Google Patents
Remote meter reading communication system Download PDFInfo
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- CN201629041U CN201629041U CN201020300524XU CN201020300524U CN201629041U CN 201629041 U CN201629041 U CN 201629041U CN 201020300524X U CN201020300524X U CN 201020300524XU CN 201020300524 U CN201020300524 U CN 201020300524U CN 201629041 U CN201629041 U CN 201629041U
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- wire size
- concentrator
- meter reading
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Abstract
The utility model discloses a remote meter reading communication system. An M-Bus places in one to thirty-two wire marking devices, and the lower part of each wire marking device places in one to one hundred direct-reading meters. Each wire marking device is connected with a concentrator by the trunk line of the M-Bus, and then the concentrator is connected with a computer. Each wire marking device is provided with a bus input port and a terminal equipment bus output port, and the two ports is disconnected and conducted by an intelligent transfer control switch. The bus input port is connected with a first polar change circuit, a modulator-demodulator, a central processing unit and address encoder in sequence, and the terminal equipment bus output port is connected with a second polar change circuit and the modulator-demodulator in sequence. The remote meter reading communication system has the advantages that further communication distance, load capacity and valve control ability are realized; M-BUS remote passive management and time division multiplex of M-BUS resources are realized; single M - BUS host loading can reach 3000 nodes; and one remote meter reading system for at most 3000 meters one needs a mains access and does not need to separately lay a power cord.
Description
Technical field
The utility model relates to a kind of communication system, especially relates to a kind of remote meter reading communication system.
Background technology
Along with the raising day by day of people's living standard, people also have higher requirement to the requirement of living environment, and the electric meter of various teletransmissions also enters into huge numbers of families one after another, provide convenience for people's life.Home intelligence and sub-district intellectuality also not merely are that indivedual high-grade sub-districts can have, and along with the continuous development of technology, the active support of the government in the increasing community, has all been installed the Automatic meter reading system of various communication modes additional.Along with technology gradually maturation and cost constantly reduce, the photo-electronic directly reading kilowatt meter reading-out system more and more obtains more people's favor.The commercial opportunity of photo-electronic directly reading teletransmission water power gas meter has all been seen by various enterprises, in short-term, has just occurred the teletransmission series of products of framework in the communication technology miscellaneous on the market.Exploitation is once cover is stable, accurately and easily kilowatt meter reading-out system has also become the powerful mean that each big producer dominates the market.And exploitation so the core technology of a cover system and technological difficulties on communication system.At present, communication mode has carrier type, radio-type, 485 bus transfer types and M-Bus type in the common photo-electronic directly reading kilowatt meter reading-out system on the market.
Below four kinds of communication modes are carried out concise and to the point comparison:
1, the application time of power line carrier technology in automatic data logging long, but mainly be to be used for ammeter.With regard to ZAP, be exactly noise to the bigger factor of carrier communication success ratio influence, ammeter normally is placed in the outdoor ammeter box, and power utilization environment on every side is single fixing, so carrier communication can be relatively stable.And water meter be installed in usually indoor, in the particular surroundings such as toilet, kitchen, electrical appliance on every side is more, and the noise of electrical appliance also than much bigger, complicated many of ammeter, therefore realizes that with power line carrier the automatic data logging of photo-electronic directly reading water meter is not reliable yet around the water meter.
2, the inferior position of applications of wireless technology on water meter is just more obvious, well-known wireless communication technology is subjected to the peripheral obstacle effect very big, water meter often is installed in again in the space of hidden relatively even sealing, so this is a sizable test to Radio Transmission Technology.Even it is very reliable that wireless communication technology is done, but wireless module is to need power supply, so just must add packed battery to wireless module, the life-span of battery just becomes the bottleneck of radio communication.Therefore, be unsatisfactory with wireless communication technology as the transmission mode of the automatic data logging of photo-electronic directly reading water meter.
3, many companies have in the market also recognized carrier communication and the drawback of radio communication in the photo-electronic directly reading water meter, have adopted the mode of 485 bus communications.Yet relative carrier communication of 485 bus communications and radio communication, though the reliability of communication strengthens to some extent, the power issue of 485 buses is difficult problems that each producer all must face; And 485 buses also can run into the comparison stubborn problem in the process of construction, because 485 buses are to lean on 4 order wires with opposed polarity to carry out data transmission, in the process of construction, 4 lines have any misconnection all can cause communication failure.The anti-interference of 485 buses is also poor, often needs to adopt shielding line just can avoid interference in communication process, and this has strengthened the cost of construction undoubtedly again.Because the characteristics of 485 buses self, so the topology of 485 buses neither be fine, change the user of structure or number of users is more, the user sub-district of structure more complicated for needs, 485 buses are realizing also often seeming at a loss what to do aspect the direct-reading of photoelectricity water meter.
4, the M-Bus bus is as a kind of special in consuming the data bus of surveying instrument sum counter transmission information, its feature is that two transmission lines are nonpolarity, and topological performance is good, can connect according to any topological form, and bus can be powered, and solved the essential deficiency that relies on the power supply power supply of other buses, and the M-Bus bus communication is reliable, strong interference immunity has been widely used in various teletransmissions and has checked meter in the instrument.But the M-Bus bus can only be exported the electric current of about 3mA, and needed immediate current approximately needs 10 ~ 20mA when copy reading photoelectricity water meter, and the M-Bus bus does not have this power supply capacity, provides the electric current of remote valve control powerless especially if desired.
The utility model content
The utility model has overcome shortcoming of the prior art, a kind of remote meter reading communication system is provided, solve the many problems of poor, the on-the-spot power supply of electric current load capacity too small, individual host in the M-Bus communication system, on M-Bus bus Inherent advantage (free topology, construction is simple, cost is low) basis, realized farther communication distance and load capacity, valve control ability.
The technical solution of the utility model is: a kind of remote meter reading communication system, on the M-Bus bus, insert 1-32 wire size device, under each wire size device, insert 1-100 direct-reading gage, each wire size device is connected with concentrator, again concentrator is connected with computing machine by the M-Bus bus trunk; Described wire size utensil has a bus input end mouth and an end-equipment output end of main mouth, and two ports are realized disconnecting and conducting by an intelligent switching controls switch; Described bus input end mouth is connected successively with first polarity transformation circuits, modulator-demodular unit, central processing unit and address scrambler; Constant-current supply is connected with modulator-demodular unit, and central processing unit is controlled intelligent switching controls switch by constant-current drive circuit; End-equipment output end of main mouth is connected successively with second polarity transformation circuits, modulator-demodular unit.
Described wire size device also has a handheld device input port, and described handheld device input port is communicated with end-equipment output end of main mouth.
Compared with prior art, the utility model has the advantages that: for load capacity and the on-the-spot power supply of minimizing that increases individual host, design and having developed in a M-BUS system by increasing passive bus switch (passing in and out all is an intelligent switching controls switch of M-BUS interface) realizes that main frame is in the driving of different time to different node clusters; The wide voltage of passive bus (12V-30V) working method by increasing the operating voltage range of node, can increase the distance (the single host band carries 100 nodes, and the communication line with 2 * 1 is a carrier, and communication distance can reach 1000 meters) of communication.Can reach following effect after the realization:
(1) M-BUS bus remote passive management.
(2) M-BUS bus resource time division multiplex.
(3) single M-BUS main frame band carries and can reach 3000 nodes.
(4) one 3000 table meters only need place's civil power access port, and do not need to lay separately power lead with interior long-distance meter-reading system.
Description of drawings
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the structural representation of wire size device.
Embodiment
Disclosed all features in this instructions, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this instructions (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
A kind of remote meter reading communication system inserts several wire size devices on the M-Bus bus, because the wire size device has 5 bit address, therefore can insert 32 wire size devices under a concentrator, and the address is 0-31; Each wire size device can insert 100 direct-reading gages, and therefore a concentrator can drive more than 3000 direct-reading gage.By the M-Bus bus trunk each wire size device is connected with concentrator, again concentrator is connected with computing machine.
The structure of wire size device as shown in Figure 1, have a bus input end mouth 1 and an end-equipment output end of main mouth 2, realize disconnecting and conducting by an intelligent switching controls switch 9 between two ports, this intelligence switching controls switch disconnects by default; The bus input end mouth is connected successively with first polarity transformation circuits 3, modulator-demodular unit 4, central processing unit 5 and address scrambler 6; Constant-current supply 7 is connected with modulator-demodular unit, and central processing unit is by the intelligent switching controls switch of constant-current drive circuit 8 controls; End-equipment output end of main mouth is connected successively with second polarity transformation circuits 11, modulator-demodular unit.
The wire size device also has a handheld device input port 10, when network work is bad, conducts interviews by the direct-reading gage of access handheld device to this wire size device subordinate.
Principle of work of the present utility model is: adopt the M-BUS agreement, and introduce passive working method and handoff functionality in the M-BUS communication system, comprise wire size device (M-Bus highway switching) and concentrator:
(1) the wire size device is a controlled bus switch, wire size devices all under the default conditions are in off-state, the wire size device is isolated the MBUS of direct-reading gage and concentrator under off-state, after receiving the closed MBUS switch order that concentrator sends, the wire size device is with the MBUS bus conducting before and after it, and concentrator just can be visited the direct-reading gage of this wire size device subordinate.
Because the driving force of concentrator is limited, therefore can only there be a wire size device to be in opening state, and after concentrator patrols the water meter of having copied below this wire size device, must closes this wire size device at synchronization.
The wire size device has 5 bit address, therefore can insert 32 wire size devices under a concentrator, and the address is 0 ~ 31, if the address, thinks then that concentrator directly connects instrument, does not need the wire size device greater than 31.When instrument is less than 120, allow concentrator directly to connect instrument, otherwise must connect instrument by the wire size device.
The wire size device is the management equipment of expanding as the network step, makes the active management equipment in upper strata easily realize concentrating no source control.USB mouth wherein is to be network work when bad, and to the interface that hander is reserved, the power supply that uses standard USB both sides is as bus line.
The maximal work parameter of wire size device is as follows:
1) input voltage: 12～50V
2) current drain: quiescent current＜1.5mA
3) working temperature :-20 ℃～+ 85 ℃
4) storage temperature :-65 ℃～+ 150 ℃
5) bus contact:＜1.5A
Bus output driving force is relevant with wire size device output switch contact, and is irrelevant with wire size device treatment circuit.The output load capacity depends on the driving force of higher level's bus.
(2) concentrator promptly is protocol conversion and the communication process manager that RS232 changes M-BUS, the centralized command of upper management equipment issue is resolved and is decomposed, to the power devices management of being managed, output short-circuit overload protection, input error protection.
When host computer transmits a signal to concentrator by RS232 because RS232 is a negative logic, high level be 3V～-12V voltage, low level is+3～+ 12V voltage.So need convert the positive logic of TTL232 to.Because M BUS Principle of Communication is following behavior voltage modulated, up is current-modulation, so this bus also is semiduplex, and certainly owing to be different modulation-demo-demodulation methods, also can full duplex communication under the constant situation of proof load.Generally speaking, descending modulation all is the Analog Electronics Technique that adopts, that is: make the semiconductor modulator tube be operated in magnifying state, and actual conditions are exactly a stabilized voltage supply.Adjust the specified voltage stabilizing value of pipe output during no signal.Reduce adjusting pipe when signal is arranged causes another voltage stabilizing value and reaches the modulation purpose.But consider the functional diversities of concentrator, universalization, miniaturization and power consumption greenization add management system, and make the adjustment pipe be operated on off state.Make concentrator can become modular manner to become powerful equipment to lay the foundation with other module group moulds.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (2)
1. a remote meter reading communication system inserts 1-32 wire size device on the M-Bus bus, inserts 1-100 direct-reading gage under each wire size device, by the M-Bus bus trunk each wire size device is connected with concentrator, concentrator is connected with computing machine again; It is characterized in that: described wire size utensil has a bus input end mouth and an end-equipment output end of main mouth, and two ports are realized disconnecting and conducting by an intelligent switching controls switch; Described bus input end mouth is connected successively with first polarity transformation circuits, modulator-demodular unit, central processing unit and address scrambler; Constant-current supply is connected with modulator-demodular unit, and central processing unit is controlled intelligent switching controls switch by constant-current drive circuit; End-equipment output end of main mouth is connected successively with second polarity transformation circuits, modulator-demodular unit.
2. remote meter reading communication system according to claim 1 is characterized in that: described wire size device also has a handheld device input port, and described handheld device input port is communicated with end-equipment output end of main mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020300524XU CN201629041U (en) | 2010-01-12 | 2010-01-12 | Remote meter reading communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020300524XU CN201629041U (en) | 2010-01-12 | 2010-01-12 | Remote meter reading communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201629041U true CN201629041U (en) | 2010-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020300524XU Expired - Fee Related CN201629041U (en) | 2010-01-12 | 2010-01-12 | Remote meter reading communication system |
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| CN (1) | CN201629041U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185747A (en) * | 2011-03-30 | 2011-09-14 | 华立仪表集团股份有限公司 | Automatic remote meter reading system |
| CN106781411A (en) * | 2016-12-22 | 2017-05-31 | 武汉盛帆智能科技有限公司 | The double main frame combination methods of M Bus and the double engine control systems of communication interface converter, M Bus |
| CN107123252A (en) * | 2017-05-27 | 2017-09-01 | 南京林洋电力科技有限公司 | A kind of M BUS trailing frogs and its intelligent switching circuit |
| CN107516411A (en) * | 2017-09-21 | 2017-12-26 | 长沙瑞斯康通信技术有限公司 | M bus kilowatt meter reading-out systems |
| CN110519139A (en) * | 2019-08-01 | 2019-11-29 | 深圳市骏普科技开发有限公司 | The method of battery power bus formula network system enhancing load capacity |
-
2010
- 2010-01-12 CN CN201020300524XU patent/CN201629041U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185747A (en) * | 2011-03-30 | 2011-09-14 | 华立仪表集团股份有限公司 | Automatic remote meter reading system |
| CN106781411A (en) * | 2016-12-22 | 2017-05-31 | 武汉盛帆智能科技有限公司 | The double main frame combination methods of M Bus and the double engine control systems of communication interface converter, M Bus |
| CN106781411B (en) * | 2016-12-22 | 2023-09-08 | 武汉盛帆电子股份有限公司 | M-Bus double-host grid connection method, communication interface converter and M-Bus double-host control system |
| CN107123252A (en) * | 2017-05-27 | 2017-09-01 | 南京林洋电力科技有限公司 | A kind of M BUS trailing frogs and its intelligent switching circuit |
| CN107516411A (en) * | 2017-09-21 | 2017-12-26 | 长沙瑞斯康通信技术有限公司 | M bus kilowatt meter reading-out systems |
| CN110519139A (en) * | 2019-08-01 | 2019-11-29 | 深圳市骏普科技开发有限公司 | The method of battery power bus formula network system enhancing load capacity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101110 Termination date: 20160112 |