CN1741086A

CN1741086A - Register module

Info

Publication number: CN1741086A
Application number: CN 200410075050
Authority: CN
Inventors: 黄焕珠
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-08-25
Filing date: 2004-08-25
Publication date: 2006-03-01

Abstract

The meter-reading module capable of utilizing low-voltage 220V power line to make data transmission is composed of power line data transmission special-purpose chip whose model is LM1893 and coding/decoding device chip whose model is UM3758-108A. LM1893 can be used as data transmission interface circuit, UM3758-108A can be used as number codes of three meters (water meter, electric meter and gas meter), UM3758-108A has 10-bit address code of three states (''1'', ''0'' and ''open''), so that the amount of three meters which can be remotely automatically read can be up to 3 to the power 10=59049 meters.

Description

Register module

Technical field

The present invention relates to a kind of line of electric force of low-voltage network 220V that utilizes and carry out data transmission, thereby realization is called for short register module to the module of the remote automatic meter reading of water meter, ammeter, gas meter.

Technical background:

The line of electric force of low-voltage network 220V connects every household, utilizes ready-made 220V line of electric force to come transmission of data signals to have the advantage of wire communication, and it need not to go hack lever, cutter wall, backguy again; The line of electric force data transmission special chip LM1893 that selects for use National Semiconductor to produce, it has, and peripheral circuit is simple, reference carrier frequency is wide (50KHz～300KHz), working stability, advantage such as easy to adjust; The UM3758-108A coder chip of selecting for use Taiwan Lian Hua company to produce, it integrates, and coding sends and reception is decoded, and is a complete interface circuit chips.UM3758-108A has 10 bit address coding, and has " 1 ", " 0 " and " open circuit " three kinds of state encodings, and code capacity is 3 ¹⁰=59049, setting " 1 ", " 0 " and " open circuit " are respectively water, electricity, gas state encoding separately, the capacity of checking meter that such phase 220V line of electric force can be finished the average every kind of table of water, electricity, gas table is 19683, be the unit of checking meter with a transformer, such quantity reaches capacity requirement fully.Select for use different pulse module (sensor) to gather the valid data of water meter or ammeter or gas meter operation, can realize the remote automatic meter reading of water meter, ammeter, gas meter.

Technology contents:

The circuit theory diagrams of register module as shown in Figure 1, IC ₁Be that model is the line of electric force exclusive data traditional die composition carrier interface circuit 1 of LM1893, IC ₂Be that model is formed Data Receiving and transmission interface circuit 2, IC for the UM3758-108A coder ₃, IC ₄Be that model is that electricity (or cut off the water and send water, or stop the supple of gas or steam and supply gas) operation control circuit 3, IC are sent in power failure that CD4068 and relay J are formed ₅By model is that CD4068 and model are the IC of CD4066 ₁₂, IC ₁₃And the function circuit that relay J is formed inserts bus circuit 4, IC ₇By model is the microcontroller system circuit 5 formed of 8051 series monolithics (IC wherein ₈Be non-volatile memory), IC ₉By model is the operation auxiliary circuit 6 that CD4066 forms, IC ₁₀By model is the answering circuit 7 of checking meter that CD4068 forms, IC ₁₁By model is sealing in of forming of 74LS164/and go out translation circuit 8, IC ₆By model is that nine partial circuits such as signal receiving circuit 9 grades of checking meter that CD4068 forms are formed.

Register module adopts the hardware circuit netting of shaking hands, host computer (microcomputer of checking meter) carries out broadcast type when calling out to hanging over terminal three table (water meter, ammeter, gas meter) on the 220V line of electric force, the plane No. identical with the call address sign indicating number made the calling of answer signal response host computer by hardware circuit, and then just enter data communication, carry out concrete operations by the content of host computer order by register module.Be to reduce the workload of singlechip CPU, the king's that checks meter electricity, power failure (or send water, cut off the water or supply gas and the stop the supple of gas or steam) operation of sending is operated control without CPU by the circuit 3 and 4 of Fig. 1.

Register module works in four kinds of working methods: record and storing electricity (water yield, tolerance) working method; The working method of checking meter; (cut off the water or stop the supple of gas or steam) operation element mode has a power failure; Send electricity (send water or supply gas) operation element mode.

Description of drawings

Fig. 1 is the circuit theory diagrams of register module.

Embodiment

Now be applied to the embodiment (application of water meter, gas meter is similar) that watt-hour meter is an example explanation automatic data logging with register module.In Fig. 1 circuit, it is DD862-4 type watt-hour meter that the mechanical type watt-hour meter is selected model for use, it is the MC-2515 infrared photoelectric sensor that the pulse module of circuit 5 is selected model for use, MC-2515 has along with the aluminium rotating disk revolution of watt-hour meter is moving once enclosing the function of exporting a pulse signal, and the number of turns that it has finished the watt-hour meter aluminium dial rotation that will rotate becomes pulse number and exports to Single Chip Microcomputer (SCM) system and count and store.

When register module is operated in record and during the storing electricity working method, the IC of Fig. 1 at this moment ₇INT ₀Interface does not have input signal, and the single-chip microcomputer pulse number that just the paired pulses module is exported under the support of software is counted and added up and store.

When register module is operated in when checking meter working method, at first being sent by host computer (microcomputer of checking meter) is with the broadcast type call frame of address code and meter reading data code to transmit on low pressure 220V line of electric force, at this moment hang over the calling that all register modules on the homophase 220V line of electric force all receive host computer, but unique to have only model be that the consistent plane No. of ground sign indicating number and the host computer of the UM3758-108A address code of calling out is just in numeric data code (11)～(18) of UM3758-108A end output data.If meter reading data code " 10101011 "=D ₈D ₇D ₆D ₅D ₄D ₃D ₂D ₁, its signals transmission is: the register module that is attempted by on the 220V line of electric force receives the call signal of checking meter that host computer sends, and signal is input to IC then through the I.F.T. coupling ₁(10) end, through arrangement back by IC ₁(12) end output, be transported to IC again ₂(22) end, work as IC ₂Address code when 1.～10. holding address code in the call frame of the code compiled and host computer consistent, just at IC ₂(11)～(18) end output host computer call frame in the meter reading data code come and serve the data bus that register module is provided with.IC ₁₀Be the answering circuit of checking meter that is attempted by on the data bus, IC ₁₀Front-end circuit have three not circuits to become 1 with 0, after conversion, become " 11111111 ", IC by data code " 10101011 " like this ₁₀Output terminal just export a high level pulse and flow to IC ₉5. end, IC ₉Be that model is the bidirectional analog switch chip of CD4066, work as IC ₉5. end when obtaining triggering level, it 3., 4. end just becomes closure by disconnection, because IC ₉3., 4. end is attempted by IC ₁, IC ₂(5), (11) and (21), (24) between, IC ₉(3), (4) closing of contact can make IC ₁, IC ₂Be in coding and send duty, IC ₂(11)～(18) be again the data latching output terminal, it latchs output to the data code of host computer call frame, remains to till new data output signal arrives always.Work as IC like this ₁, IC ₂Obtain high level signal and be in coding when sending duty, the code that register module just will latch output is the numeric data code address code that adds own chip itself to the host computer transmission of encoding, and finishes the netting of shaking hands of host computer calling.

After host computer (microcomputer of checking meter) is received answer signal, illustrate and found the plane No. that to check meter, at this moment host computer formally sends the order of checking meter to register module, if the address code that the data code of checking meter adds register module itself for " 00000000 " eight 0 for the command transfer of checking meter to behind the 220V line of electric force, the register module IC that has responsed ₂(11)～(18) ends will export " 00000000 " data, its effect has two: one, change IC ₂Data latching output code originally; The 2nd, bus is carried out clearly 0.Be attempted by the signal receiving circuit 9 of checking meter on the bus, IC ₆Front-end circuit form by eight not gates, it will be that 0 to become be 1 entirely on the bus entirely, model be that eight inputs and the goalkeeper of CD4068 obtain is 1 input signal entirely like this, its output will be high level signal, at this moment the INT of single-chip microcomputer ₀End will obtain the interruption pulse signal and cause interruption, and CPU just response interrupts, and stop current executive routine commentaries on classics and remove to carry out interrupt service routine (meter reading procedure), and this moment, single-chip microcomputer was just from IC ₈In access the charge value of storage, output to IC by the P1.6 mouth serial of single-chip microcomputer ₁₁(1) end, then by IC ₁₁Serial data is transformed to parallel data to be transported on 8 bit data bus, by IC ₈After delivering on the bus, the electric quantity data that accesses exports a trigger action IC by the P2.1 mouth of single-chip microcomputer ₉(12) end, IC at this moment ₉(11)～(10) ends become closure by disconnection, act on IC ₁, IC ₂Be in coding and send duty, the charge value that is outputed on the bus by single-chip microcomputer has become IC like this ₂Digital coding, work as IC ₉(11)～(10) when closed, be the IC of digital coding with the charge value ₂Just carry out carrier wave and send to host computer (microcomputer of checking meter), establish and be stored in the single-chip microcomputer memory IC to the 220V line of electric force ₈Interior electric quantity data is 16 binary codings, because data bus (or IC ₂The digital coding end) have only eight, just finish the data of checking meter and send so will send at twice by single-chip microcomputer.IC ₁₁(9) end for clear terminal, low level is effective, IC ₁₁(8) end hold for sheet choosing, high level is effective, so promptly finishes whole automatic data logging process.

When register module was operated in power failure operation element mode, register module was selected the relay J of Fig. 1 for use ₁Normally closed contact be user power supply station control loop, when normally closed contact was closed, the user obtained normal power supply, during the normally closed contact tripping, the user is stopped electricity consumption.Adopt relay J ₁Normally closed contact advantage that user's power supply is controlled be: when power supply department to local electricity consumption zone carry out the temporary interruption operation electricity is sent in recovery again the time, need not interfere by host computer (microcomputer of checking meter), register module can allow the user have access to electricity on time, in addition for being late for individually paying the electricity charge by the user that had a power failure, after host computer sends the power failure operational order, the relay J of register module ₁Action, its normally opened contact J ₁Suction contains, give the input of single-chip microcomputer P2.7 mouth a pulse signal, CPU just remembers this signal in the F of program status word (PSW), like this power supply department to local electricity consumption zone carry out the temporary interruption operation send electricity again the time, the register module at arrearage family is detected by program power cut signal among the F, promptly, act on relay J in pulse of the P1.4 of single-chip microcomputer mouth output ₁Action and self-sustaining, thereby the power supply at disconnection arrearage family.

Program process when register module is operated in power failure operation element mode: call frame from power failure service data code to low pressure 220V line of electric force that at first send band address code and by host computer (microcomputer of checking meter), if power failure service data code is " 10101010 ", the transmission course of call frame is similar to the call frame transmission course of the duty of checking meter, at this moment called register module IC ₂(11)～(18) ends will export " 10101010 " numeric data code, make IC after inserting bus circuit 4 processing through the function circuit of Fig. 1 ₅Be output as high level, relay J ₃Obtain electric adhesive and self-sustaining.Relay J ₃Two aspects of action effect: the one, reply host computer and call out, host computer is known received the plane No. of the required operation that has a power failure, its process is a relay J ₃The normally opened contact closure, IC ₉6 ends obtain a pulse signal, make IC ₉(8)～(9) ends become closure by disconnection, act on IC ₁, IC ₂Be in coding and send duty, finish the operation of answer signal; The 2nd, relay J ₃Action makes IC ₁₂, IC ₁₃Have 8 bidirectional analog K switch closures, send electric function circuit 4 to insert bus power failure, be next step ready for operation.

After host computer is received answer signal, the plane No. that has found the operation that will have a power failure is described, at this moment host computer formally sends the power failure operational order to register module, if the data code of power failure operational order is " 01010111 ", add the address code of register module, after host computer (microcomputer of checking meter) is transferred to the 220V power line carrier with the power failure operational order, the register module IC that has responsed ₂(11)～(18) end output " 01010111 " data and latch IC at this moment ₃Output terminal output high level, drive relay J ₁Action and self-sustaining, relay J ₁Its normally opened contact closure of action back is given IC ₉(13) end carry a pulse signal, trigger IC ₉(1)～(2) ends become closure by disconnection, at this moment act on IC ₁, IC ₂The transmission of encoding is told host computer to have a power failure and is operated successfully; Relay J ₁After the action, its normally closed contact action disconnects relay J ₃Self-holding circuit, make relay J ₃Tripping, and then IC ₁₂, IC ₁₃And then tripping, eight bidirectional analog K switch are followed tripping, with the function circuit 4 disengaging buses of Fig. 1, in addition, relay J ₁After the action, flashing diode is shinny, reminds the user to pay the electricity charge, finishes the remote-controlled operation process of power failure.

When register module work transmits electric mode of operation, its course of work is similar to the power failure working method, different is to send electric data code of operating to become " 10110110 " of sending electricity to operate by " 01010111 " of the operation that has a power failure, after register module is received sending the electricity order and translating numeric data code " 01010111 " of host computer, IC ₄Export a high level, relay J ₂Action, its normally closed contact disconnects relay J ₁Self-holding circuit make relay J ₁Tripping, J ₁Normally closed contact becomes closure by disconnection, and the power supply of connecting subscribers participating is finished the operation of sending electricity.

Relay J ₂Normally opened contact directly be attempted by IC ₁, IC ₂The coding transtation mission circuit in, normally opened contact J ₂Closure make IC ₁, IC ₂The transmission of encoding tells host computer to send electricity to operate successfully; In addition, relay J ₂Normally opened contact send to a pulse for the P2.6 mouth of single-chip microcomputer, finish by software that note exists the value of the F in the program state to carry out zero clearing when having a power failure originally, to guarantee user's normal power supply.

Claims

1, the carrier interface circuit 1 of a kind of register module such as Fig. 1 is that IC and the peripheral circuit of LM1893 formed by model, and the transmission of data and receiving interface circuit 2 are the IC of UM3758-108A by model ₂And peripheral circuit is formed.It is characterized in that: IC ₂1～10 end address code as three the table (water meter, ammeter, gas meter) the numbering code; K4 is as the transmission enable switch that sends electric weight (or the water yield, tolerance); K3 is as the call answering switch that has a power failure and send electricity to operate; K2 is as the switch of the successful feedback signal of operation that has a power failure; The switch of replying that K1 calls out as checking meter; J ₂As the switch that send the successful feedback signal of electricity operation.

2, according to right 1 described register module, it is characterized in that: the eight bit data bus is set up in register module inside, hangs with the carrier signal with two-way inputoutput data signal on the bus and sends and receiving loop (IC ₂The loop); Hang with power failure operation circuit (IC ₃The loop); Hang with and send electric operation circuit (IC ₄The loop); Hang with power failure or send electricity operation call answering loop (IC ₅The loop); Hang with the call answering loop (IC that checks meter ₁₀The loop); Hang with the order receiving loop (IC that checks meter ₆The loop); Hang with the monolithic motor and send meter reading data output loop (IC ₁₁The loop) seven loops such as.

3, according to claim 1,2 described register modules, it is characterized in that: pulse module is to be installed in sensor in ammeter, water meter or the gas meter (claiming probe again) in the microcontroller system circuit 5 of Fig. 1, sends valid data to single-chip microcomputer by pulse module and counts and store and promptly finish meter-reading function.

4, according to claim 1,2,3 described register modules, it is characterized in that: register module adopts the relay J of Fig. 1 ₁The reference mark that powers for the user of normally closed contact lead-in wire, for the user who pays dues on time without operational relay J ₁Can make the normal electricity consumption of user, water, use gas; When the individual user is late for paying dues, as long as with relay J ₁Action, its normally closed contact tripping, the power supply that promptly disconnects this family is stopped power supply.