CN209028810U - A kind of M-Bus main website multi-channel intelligent meter reading remote transmission device - Google Patents
A kind of M-Bus main website multi-channel intelligent meter reading remote transmission device Download PDFInfo
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- CN209028810U CN209028810U CN201822097655.1U CN201822097655U CN209028810U CN 209028810 U CN209028810 U CN 209028810U CN 201822097655 U CN201822097655 U CN 201822097655U CN 209028810 U CN209028810 U CN 209028810U
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Abstract
The utility model provides a kind of M-Bus main website multi-channel intelligent meter reading remote transmission device, in described device: the meter reading request signal input terminal of meter reading platform/local meter reading operational module meter reading request signal output end connection CPU；CPU control connects the switch control signal input terminal of each intelligent channel；The meter reading control signal input of the meter reading control signal output connection 13/36V meter reading signal modulation module of CPU；The Mbus- modulated signal input terminal of the Mbus- modulated signal output end connection intelligent channel of 13/36V meter reading signal modulation module；Intelligent channel connects table end while connecting multiple tables；The Mbus+ modulated signal output end of each intelligent channel connects the Mbus+ modulated signal input terminal of double operational differential data acquisition demodulation analog-to-digital conversion module jointly；Double operational differential data acquisition demodulation analog-to-digital conversion module outputs signal to the data input pin of CPU.
Description
Technical field
The utility model belongs to smart meter reading technical field, and in particular to a kind of M-Bus main website multi-channel intelligent meter reading is remote
Pass device.
Background technique
Current water, electricity, gas, hotlist intelligent terminal continue to develop, and many data transfer modes continuously emerge:
Traditional TTL reading technique needs power supply line and cannot achieve remote transmission, vulnerable to the dry of site environment
The case where disturbing, data is made to misplace in communications, construction cost is big, not convenient for safeguarding, and failure rate is higher；
The reading technique of RS485 communication modes also needs power supply line, is communicated using 4 lines, cause use cost and
Failure rate greatly improves, and load capacity is weak, and use cost is caused to greatly increase；
M-Bus technology two-wire system, had both met remote transmission, can also meet remote power feeding, use cost and failure rate
It substantially reduces, but current M-Bus data acquisition technology uses one-terminal current modulation technique, to the anti-dry of live complex environment
It is obviously insufficient to disturb ability, meter reading is unstable, also limits the technology in the development in meter reading field.
Utility model content
In order to overcome the deficiencies of the prior art, the utility model provides a kind of M-Bus main website multi-channel intelligent meter reading teletransmission
Device, had both met remote transmission, remote power feeding, and on-site data gathering is more reliable and more stable.
A kind of M-Bus main website multi-channel intelligent meter reading remote transmission device, including: meter reading platform/local meter reading manipulates mould
Block, CPU, 13/36V meter reading signal modulation module, double operational differential data acquisition demodulation analog-to-digital conversion module, multiple intelligent channels
The table end that connects of module, each intelligent channel is accordingly connected with multiple tables；The meter reading of meter reading platform/local meter reading operational module is asked
Seek the meter reading request signal input terminal of signal output end connection CPU；Each intelligent channel switch control terminal of CPU connects one to one
The switch control signal input terminal of corresponding intelligent channel；The meter reading control signal output of CPU connects 13/36V meter reading signal tune
The meter reading control signal input of molding block, CPU's connects 13/36V meter reading signal modulation mould to meter reading address signal output end
Block to meter reading address signal input terminal；The Mbus- modulated signal output end of 13/36V meter reading signal modulation module connects simultaneously
The Mbus- modulated signal input terminal of each intelligent channel；Total line output terminal of each intelligent channel connects corresponding multiple tables simultaneously
Bus input end, total line output terminal of each table connect the bus input end of corresponding intelligent channel jointly；Each intelligent channel
Mbus+ modulated signal output end connects the Mbus+ modulated signal of double operational differential data acquisition demodulation analog-to-digital conversion module jointly
Input terminal；The acquisition data difference amplified signal output end of double operational differential data acquisition demodulation analog-to-digital conversion module connects CPU
Acquisition data signal input；Acquisition data signal output connection meter reading platform/local meter reading operational module of CPU is adopted
Collect data signal input.
The M-Bus main website multi-channel intelligent meter reading remote transmission device, in which: the 13/36V meter reading signal modulation mould
Block includes 36V power supply chip, for providing 36V regulated power supply；13/36V meter reading signal modulation module further includes MBUS- modulation letter
Number output circuit: the first end connection CPU of the 7th resistance to meter reading address signal output end, the second end of the 7th resistance connects
The intermediate contact of the base stage of 2nd NPN triode, the base stage of the second end and the 2nd NPN triode of the 7th resistance also passes through the 9th
Resistance eutral grounding；The emitter of 2nd NPN triode is grounded, and the collector of the 2nd NPN triode connects the first end of the 4th resistance,
The second end of 4th resistance connects the grid of the first metal-oxide-semiconductor, and the drain electrode of the first metal-oxide-semiconductor connects 36V power supply, and the 36V power supply is by electricity
Source chip U4 is provided, and first diode and the 5th resistance constitute the first parallel circuit, the first parallel circuit be connected to 36V power supply with
Between the second end of 4th resistance, the second end of anode the 4th resistance of connection of first diode, the first parallel circuit is also connected with
Between the drain electrode and its grid of the first metal-oxide-semiconductor, the grid of anode the first metal-oxide-semiconductor of connection of first diode, the first metal-oxide-semiconductor
Source electrode connects the anode of the 4th diode, and the cathode of the 4th diode connects the drain electrode of the second metal-oxide-semiconductor, the drain electrode of the second metal-oxide-semiconductor
The second parallel circuit is also connected between its grid, the second parallel circuit is by the 5th diode structure in parallel with thirteenth resistor
At the grid of anode the second metal-oxide-semiconductor of connection of the 5th diode；The anode of 4th diode also passes through third diode, second
Diode connects 13V power supply；The source electrode of second metal-oxide-semiconductor is used to export Mbus- modulated signal to the Mbus- modulation letter of intelligent channel
Number input terminal；The grid of second metal-oxide-semiconductor connects the collector of the 9th triode, the transmitting of the 9th triode by the 19th resistance
Pole ground connection, the base stage of the 9th triode connect the collector of the 8th triode, the collection of the 8th triode by the 27th resistance
Electrode also passes through the 15th resistance connection CVCC1 power supply, the emitter ground connection of the 8th triode, the base stage connection of the 8th triode
The collector of 7th triode, the collector of the 7th triode also pass through the 16th resistance connection 3.3V power supply, the 7th triode
Emitter ground connection, the base stage of the 7th triode controls signal output connecting pin by the meter reading that the 24th resistance connects CPU.
The M-Bus main website multi-channel intelligent meter reading remote transmission device, in which: in intelligent channel module: the 69th electricity
The first end of resistance is used to connect the corresponding intelligent channel switch control pin of CPU, and the second end of the 69th resistance connects third
The input side anode of the input side cathode of photoelectrical coupler, third photoelectrical coupler connects 3.3V electricity by the 61st resistance
The outlet side collector in source, third photoelectrical coupler connects CVCC1 power supply by the 63rd resistance, third photoelectrical coupler
Outlet side emitter connects the base stage of the 16th triode, the collector connection the of the 16th triode by the 79th resistance
The 10th pin of control terminal of three signal relays, the emitter ground connection of the 16th triode；1st pin of third signal relay
Connect C13V power supply, the 3rd pin of third signal relay is used to connect in the 13/36V meter reading signal modulation module the
The source electrode of two metal-oxide-semiconductors, the Mbus- modulated signal come for receiving the 13/36V meter reading signal modulation module conveying；Third
4th pin of signal relay issues the first end of bus M2- by the connection of the 11st inductance magnetic bead, issues the of bus M2-
What two ends connected the needed meter reading of the group simultaneously issues address signal input terminal；The up-delivering signal output end of the needed meter reading of the group
By uploading the second end of the tenth inductance magnetic bead of bus M2+ connection, the first end of the tenth inductance magnetic bead connects third signal relay
The 7th pin of device K3, the 8th pin of third signal relay K3 for export comprising currently to meter reading data signal and currently to
The Mbus+ modulated signal of meter reading address signal, the 8th pin of third signal relay K3 is for connecting the double operational difference number
According to the Mbus+ modulated signal input terminal of acquisition demodulation analog-to-digital conversion module.
The M-Bus main website multi-channel intelligent meter reading remote transmission device, in which: the double operational differential data acquisition demodulation
In analog-to-digital conversion module, Mbus+ modulated signal input pin connects two paths of signals transmission circuit simultaneously:
The first via connects the first end of the 23rd capacitor, and the second tunnel connects the first end of the 47th resistance；
The first via: the second end of the 23rd capacitor is grounded after concatenating the 43rd resistance, the 23rd capacitor and the 4th
13 resistance constitute the first bandpass filter；
The second end of 23rd capacitor connects the first end of the 21st capacitor, the second end concatenation of the 21st capacitor
It is grounded after 42nd resistance, the 21st capacitor and the 42nd resistance constitute the second bandpass filter；
The input cathode of the first operational amplifier is accessed after second end the 41st resistance of concatenation of 21st capacitor；
The 39th feedback resistance is connected between the input cathode and output end of first operational amplifier；
Second tunnel: the second end of the 47th resistance is grounded after connecting the 51st resistance, and the second of the 47th resistance
End is also connected with the first end of the 24th capacitor；
The second end of 24th capacitor is grounded after concatenating the 56th resistance, the 24th capacitor and the 56th resistance
Constitute third bandpass filter；
The second end of 24th capacitor is also connected with the first end of the 25th capacitor, the second end string of the 25th capacitor
It is grounded after connecing the 54th resistance, the 25th capacitor and the 54th resistance constitute the 4th bandpass filter；
The input anode of the first operational amplifier is accessed after second end the 50th resistance of concatenation of 25th capacitor, the
The input anode of one operational amplifier is grounded after also concatenating the 55th resistance；
The input terminal that second operational amplifier is accessed after output end the 37th resistance of concatenation of first operational amplifier is negative
Pole connects the feed resistance of third eighteen incompatibilities, second operational amplifier between the input cathode and output end of second operational amplifier
Input anode ground connection, the output end of second operational amplifier is used to connect the acquisition data signal input of CPU.
The M-Bus main website multi-channel intelligent meter reading remote transmission device, in which: the CPU uses Atemel processor.
The M-Bus main website multi-channel intelligent meter reading remote transmission device of the utility model, can not only transmit acquisition number at a distance
According to and remote power feeding, also by the signal modulation of 13/36V meter reading signal modulation module, double operational differential data acquisition solution mode transfer
The double operational differential ference spiral modulus conversion technique of conversion module and the intelligent channel module to meter reading end are counted, live ring is increased
Adaptability, the stability of meter reading in border meet acquisition data stability, the demanding meter reading need of equipment operational reliability at present
It asks.
Detailed description of the invention
Fig. 1 is the structural block diagram of the utility model M-Bus main website multi-channel intelligent meter reading remote transmission device；
Fig. 2 is the circuit pin schematic diagram of CPU；
Fig. 3 is the circuit diagram of 13/36V meter reading signal modulation module；
Fig. 4 is the circuit diagram of double operational differential data acquisition demodulation analog-to-digital conversion module；
Fig. 5 is the circuit diagram of intelligent channel module.
Specific embodiment
The utility model provides a kind of M-Bus main website multi-channel intelligent meter reading remote transmission device, as shown in Figure 1, comprising:
Meter reading platform/local meter reading operational module, CPU, 13/36V meter reading signal modulation module, double operational differential data are adopted
The table end that connects of collected explanations or commentaries tune analog-to-digital conversion module, multiple intelligent channel modules, each intelligent channel is accordingly connected with multiple tables；
The meter reading request signal that meter reading platform/local meter reading operational module meter reading request signal output end connects CPU is defeated
Enter end；
Each intelligent channel switch control terminal of CPU connect one to one corresponding intelligent channel switch control signal input
End；
The meter reading control signal input of the meter reading control signal output connection 13/36V meter reading signal modulation module of CPU
End, CPU to meter reading address signal output end connection 13/36V meter reading signal modulation module to meter reading address signal input terminal；
The Mbus- of the Mbus- modulated signal output end connection intelligent channel of 13/36V meter reading signal modulation module modulates letter
Number input terminal；
Total line output terminal of intelligent channel connects the bus input end of multiple tables simultaneously, and total line output terminal of each table is common
Connect the bus input end of intelligent channel；
The Mbus+ modulated signal output end of each intelligent channel connects double operational differential data acquisition demodulation analog-to-digital conversion jointly
The Mbus+ modulated signal input terminal of module；
The acquisition data difference amplified signal output end of double operational differential data acquisition demodulation analog-to-digital conversion module connects CPU
Acquisition data signal input；
Acquisition data signal output connection meter reading platform/local meter reading operational module acquisition data-signal of CPU is defeated
Enter end.
The meter reading process of the M-Bus main website multi-channel intelligent meter reading remote transmission device, includes the following steps:
1), CPU judges whether its meter reading request signal input terminal has the meter reading of meter reading platform/local meter reading operational module to ask
The meter reading request signal for asking signal output end conveying；Later, it enters step 2)；
2), CPU reads the address information of the needed meter reading of pre-stored in its storage device, judges and recalls currently wait copy
The address information of table, for this currently to the address information of meter reading, the corresponding intelligent channel switch control terminal output switch control of CPU
Signal processed is conveyed to the switch control signal input terminal of corresponding intelligent channel, controls intelligent channel opening；Later, enter
Step 3)；
3), the meter reading control signal output of CPU controls signal to the meter reading of the 13/36V meter reading signal modulation module
Input terminal output currently controls signal to the meter reading of meter reading, and CPU's exports to meter reading address signal output end currently to meter reading
Address signal is to the 13/36V meter reading signal modulation module to meter reading address signal input terminal；Later, it enters step 4)；
4), CPU receives the acquisition data difference amplification letter of the double operational differential data acquisition demodulation analog-to-digital conversion module
Number output end, which is conveyed into it and acquires the current of data signal input, acquires data-signal to meter reading, and stores and currently adopt to meter reading
Collect data-signal, CPU judges whether current table address signal in meter reading acquisition data-signal that this receives is according to copying
The last one of table sequence waits for the address signal of meter reading, if it is not, entering step 2), if so, entering step 5)；
5), the data-signal of all tables is delivered to meter reading platform/local by its acquisition data signal output and copied by CPU
The acquisition data signal input of table operational module.
In addition, the Mbus- modulation letter that the Mbus- modulated signal output end of the 13/36V meter reading signal modulation module exports
After number being output to the Mbus- modulated signal input terminal of intelligent channel, correspondence is transported to by total line output terminal M2- of intelligent channel
Multiple bus input ends to meter reading of connection each interpret the address information in Mbus- modulated signal to meter reading, if with certainly
Oneself address information is corresponding, which just passes through its own total line output terminal and export its own data-signal to the total of intelligent channel
Line input terminal M2+, intelligent channel are again conveyed the data-signal of the table by the Mbus+ modulated signal output end of the intelligent channel
The Mbus+ modulated signal input terminal of demodulation analog-to-digital conversion module is acquired to double operational differential data, it is poor by the double operational later
Divided data acquisition demodulation analog-to-digital conversion module is handled.
CPU's controls letter to the meter reading of the 13/36V meter reading signal modulation module every time to meter reading address signal output end
Number input terminal exports one currently to the address signal of meter reading, and the Mbus- of the 13/36V meter reading signal modulation module modulates letter
Number output end just corresponding output one comprising being transported to intelligent channel currently to the Mbus- modulated signal of meter reading address information
Mbus- modulated signal input terminal；
Later, address information uploads its own data-signal by bus to meter reading in the corresponding Mbus- modulated signal
To intelligent channel, the Mbus+ modulated signal output end of intelligent channel conveys the address information of institute's meter reading and the table data-signal
The Mbus+ modulated signal input terminal of demodulation analog-to-digital conversion module is acquired to double operational differential data；
The such hair one of CPU is received, and is finished until reading the data-signal of needed meter reading.
Fig. 2 show the circuit pin schematic diagram of CPU, and CPU uses Atemel processor, model AT91SAM9625.
In the present embodiment, there are three intelligent channel switch control pins by CPU, and respectively 23 feet, 24 feet, 83 feet connect respectively
It is connected to the switch control signal input terminal of the first, second, third intelligent channel；Three intelligent channels are set in the present embodiment, often
A intelligent channel connects 1~20 to meter reading.
The meter reading control signal output of CPU is 21 feet, and the meter reading of connection 13/36V meter reading signal modulation module controls letter
Number input terminal MBUS 485C；CPU is 13 feet to meter reading address signal output end, connects 13/36V meter reading signal modulation module
To meter reading address signal input terminal TXD MBUS；The circuit diagram of 13/36V meter reading signal modulation module is shown in Fig. 3.
The acquisition data difference amplified signal output end RXD of double operational differential data acquisition demodulation analog-to-digital conversion module
14 foot of acquisition data signal input of MBUS connection CPU；The circuit of double operational differential data acquisition demodulation analog-to-digital conversion module
Figure is shown in Fig. 4.
Fig. 3 is the circuit diagram of 13/36V meter reading signal modulation module, and 13/36V meter reading signal modulation module includes 36V
Power supply chip U4, using model XL6019, for providing 36V regulated power supply；13/36V meter reading signal modulation module further includes
MBUS- modulated signal output circuit: the first end connection CPU of the 7th resistance R7 to 13 foot of meter reading address signal output end, the
The second end of seven resistance R7 connects the base stage of the 2nd NPN triode N2, the second end of the 7th resistance R7 and the 2nd NPN triode N2
Base stage intermediate contact also pass through the 9th resistance R9 ground connection；The emitter of 2nd NPN triode N2 is grounded, the 2nd NPN three-level
The collector of pipe N2 connects the first end of the 4th resistance R4, and the second end of the 4th resistance R4 connects the grid G of the first metal-oxide-semiconductor Q1,
The drain D of first metal-oxide-semiconductor Q1 connects 36V power supply, and first diode D1 and the 5th resistance R5 constitute the first parallel circuit, and first simultaneously
Connection is electrically connected between 36V power supply and the second end of the 4th resistance R4, the 4th resistance R4 of anode connection of first diode D1
Second end, the first parallel circuit is additionally attached between the drain D and its grid G of the first metal-oxide-semiconductor Q1, and first diode D1 is just
Pole connects the grid G of the first metal-oxide-semiconductor Q1, and the source S of the first metal-oxide-semiconductor Q1 connects the anode of the 4th diode D4, the 4th diode
The cathode of D4 connects the drain D of the second metal-oxide-semiconductor Q2, is also connected between the drain D and its grid G of the second metal-oxide-semiconductor Q2 by the 5th
Second parallel circuit of diode D5 composition in parallel with thirteenth resistor R13, anode the second metal-oxide-semiconductor of connection of the 5th diode D5
Its grid G of Q2；The anode of 4th diode D4 also passes through third diode D3, the second diode D2 connection 13V power supply；
The source S of second metal-oxide-semiconductor Q2 is used to export Mbus- modulated signal and inputs to the Mbus- modulated signal of intelligent channel
End；
The grid of second metal-oxide-semiconductor Q2 passes through the collector of the 9th triode N9 of the 19th resistance R19 connection, the 9th triode
The emitter of N9 is grounded, and the base stage of the 9th triode N9 passes through the collector of the 8th triode N8 of the 27th resistance R27 connection,
The collector of 8th triode N8 also passes through the 15th resistance R15 connection CVCC1 power supply, and the emitter of the 8th triode N8 connects
Ground, the base stage of the 8th triode N8 connect the collector of the 7th triode N7, and the collector of the 7th triode N7 also passes through the tenth
Six resistance R16 connection 3.3V power supplys, the emitter ground connection of the 7th triode N7, the base stage of the 7th triode N7 pass through the 24th
The meter reading of resistance R24 connection CPU controls 21 foot of signal output connecting pin.
CPU issues currently when the meter reading signal of meter reading the 13/36V meter reading signal modulation module, 21 feet one of CPU
Straight output high level, 13 feet of CPU are exported to meter reading address signal；
The high level of the 21 feet output of CPU enters the base stage of the 7th triode N7 by resistance R24, the 7th triode N7's
Collector is connected with emitter, and the high level of the 8th triode N8 base stage is pulled low, the 8th triode N8 cut-off, the 9th triode
The base stage of N9 is connected to CVCC1 power supply, the 9th triode N9 conducting, between resistance R13 and resistance R19 by resistance R27, R15
There is electric current to pass through, load the voltage matches in the second metal-oxide-semiconductor grid G, the drain D of the second metal-oxide-semiconductor is connected with source S；CPU is to institute
It states 13/36V meter reading signal modulation module to issue currently when the meter reading signal of meter reading, 21 feet of CPU export always high level, protect
Drain D and the source S for demonstrate,proving the second metal-oxide-semiconductor are constantly on；
The base stage for reaching the second triode N2 by resistance R7 to meter reading address signal of the 13 feet output of CPU, control the
Two triode N2 on or off, the 13 feet output of CPU is high/low level information to meter reading address signal, high/low level control
Make the second triode N2 conduction and cut-off.
When second triode N2 is connected, by the voltage high on the first metal-oxide-semiconductor Q1 grid, the drain D of the first metal-oxide-semiconductor Q1,
Source S conducting, 36V power supply reach the 4th diode D4 by the first metal-oxide-semiconductor Q1 drain D and source S, reach the 2nd MOS later
Pipe Q2 drain D, at this point, the drain D of the second metal-oxide-semiconductor has been connected with source S, MBUS- modulated signal output end exports 36V high electricity
It is flat；
When second triode N2 ends, the first metal-oxide-semiconductor cut-off, the voltage loaded in the second metal-oxide-semiconductor drain D only has 13V
Voltage, the 13V voltage are transported to second by the second diode D2, third diode D3, the 4th diode D4 by C13V power supply
In metal-oxide-semiconductor drain D, 13V low level is exported by the second metal-oxide-semiconductor source S, MBUS- modulated signal output end exports the low electricity of 13V
It is flat；
Fig. 5 is the circuit diagram of intelligent channel module, and the present embodiment is illustrated by taking the first intelligent channel module as an example:
The first end of 69th resistance R69 is used to connect 23 foot of the first intelligent channel switch control pin of CPU, the 69th resistance
The input side cathode of the second end connection third photoelectrical coupler OP3 of R69, the input side anode of third photoelectrical coupler OP3 are logical
The 61st resistance R61 connection 3.3V power supply is crossed, the outlet side collector of third photoelectrical coupler OP3 passes through the 63rd resistance
The outlet side emitter of R63 connection CVCC1 power supply, photoelectrical coupler OP3 passes through the 16th three-level of the 79th resistance R79 connection
The base stage of pipe N16, the 10th pin of control terminal of the collector connection third signal relay K3 of the 16th triode N16, the tenth
The emitter of six triode N16 is grounded；The 1st pin of third signal relay K3 connects C13V power supply, third signal relay
The 3rd pin of K3 is used to connect the source S of the second metal-oxide-semiconductor Q2 in the 13/36V meter reading signal modulation module, for receiving
The Mbus- modulated signal that the 13/36V meter reading signal modulation module conveying comes；The 4th pin of third signal relay K3 is logical
The first end that the 11st inductance magnetic bead FB11 connection issues bus M2- is crossed, the second end of bus M2- is issued while connecting this group of institute
Need meter reading issues address signal input terminal；The up-delivering signal output end of the needed meter reading of the group is connected by uploading bus M2+
The second end of the tenth inductance magnetic bead FB10 is connect, the first end of the tenth inductance magnetic bead FB10 connects the 7th of third signal relay K3 the
Pin, the 8th pin of third signal relay K3 is for exporting comprising currently to meter reading data signal and currently to meter reading address
The Mbus+ modulated signal of signal, the 8th pin of third signal relay K3 is for connecting the double operational differential data acquisition solution
Adjust the Mbus+ modulated signal input terminal of analog-to-digital conversion module.
When 23 foot of the first intelligent channel switch control pin of CPU is transformed into low level by high level, the first intelligence of starting
It opens in channel: generating electric current between third photoelectrical coupler OP3 input terminal positive and negative anodes, third photoelectrical coupler OP3 output end
Collector is connected with emitter, and the base stage of the 16th triode N16 obtains high level, the 16th three-level by resistance R79, R63
Pipe N16 conducting, the 10 foot level of third signal relay K3 drag down, and 3 feet of third signal relay K3 receive the 13/36V
The MBUS- modulated signal is passed through it by the MBUS- modulated signal that the conveying of meter reading signal modulation module comes, third signal relay K3
4th foot is exported to the first end of the 11st inductance magnetic bead FB11, after the second end through the 11st inductance magnetic bead FB11 be transported to
Bus M2- is issued, issue that bus M2- connected parses the address signal in the MBUS- modulated signal received to meter reading
Coming, address signal compares with itself, if with the address signal of itself is not corresponding does not upload data signal to meter reading, if
It is corresponding with the address signal of itself that data signal is uploaded into upload by data signal output end to meter reading
Bus M2+, 7 feet of third signal relay K3 are transported to through the tenth magnetic bead FB10, and third signal relay K3 works as what is received
Preceding table data signal modulation is conveyed to the double operational differential data at MBUS+ signal, by 8 feet of third signal relay K3
The Mbus+ modulated signal of acquisition demodulation analog-to-digital conversion module inputs pin；
Fig. 4 is the circuit diagram of double operational differential data acquisition demodulation analog-to-digital conversion module, the double operational difference number
According in acquisition demodulation analog-to-digital conversion module, Mbus+ modulated signal input pin connects two paths of signals transmission circuit simultaneously:
The first via connects the first end of the 23rd capacitor C23, and the second tunnel connects the first end of the 47th resistance R47；
The first via: the second end of the 23rd capacitor C23 is grounded after concatenating the 43rd resistance R43, the 23rd capacitor
C23 and the 43rd resistance R43 constitutes the first bandpass filter；
The second end of 23rd capacitor C23 connects the first end of the 21st capacitor C21, the 21st capacitor C21's
Second end is grounded after concatenating the 42nd resistance R42, and the 21st capacitor C21 and the 42nd resistance R42 constitute the second band logical
Filter；
The input of the first operational amplifier U8A is accessed after second end the 41st resistance of concatenation of 21st capacitor C21
Hold cathode；The 39th feedback resistance R39 is connected between the input cathode and output end of first operational amplifier U8A；
Second tunnel: the second end of the 47th resistance R47 is grounded after connecting the 51st resistance, the 47th resistance R47
Second end be also connected with the first end of the 24th capacitor C24；
The second end of 24th capacitor C24 is grounded after concatenating the 56th resistance R56, the 24th capacitor C24 and the
56 resistance R56 constitute third bandpass filter；
The second end of 24th capacitor C24 is also connected with the first end of the 25th capacitor C25, the 25th capacitor C25
Second end concatenate the 54th resistance R54 after be grounded, the 25th capacitor C25 and the 54th resistance R54 composition the 4th band
Bandpass filter；
The input of the first operational amplifier U8A is accessed after the 50th resistance R50 of second end concatenation of 25th capacitor C25
Rectify pole, the input anode of the first operational amplifier U8A is grounded after also concatenating the 55th resistance R55；
The output end of first operational amplifier U8A accesses the defeated of second operational amplifier U8B after concatenating the 37th resistance
Enter and hold cathode, third eighteen incompatibilities feed resistance R38 is connected between the input cathode and output end of second operational amplifier U8B, the
The input anode of two operational amplifier U8B is grounded, and the output end of second operational amplifier U8B is used to connect the acquisition number of CPU
According to signal input part.
In the double operational differential data acquisition demodulation analog-to-digital conversion module, Mbus+ modulated signal inputs pin input
Mbus+ modulated signal be divided into two-way:
After the first via filters out other interference signals by the first bandpass filter, the second bandpass filter, the first fortune of input
Calculate the input cathode of amplifier U8A；Second tunnel filters out other interference by third bandpass filter, the 4th bandpass filter and believes
After number, the input anode of the first operational amplifier U8A is inputted；It is equal that both the first via and second tunnel form signal magnitude, pole
The opposite input signal of property, according to the differential amplification principle of operational amplifier, equal in magnitude, the pole of differential pair tube current increment
Property increase, can effectively put on the contrary, 1 foot of output end (OUTA) of the first operational amplifier U8A is caused to export voltage over the ground
Big difference mode signal, while inhibiting common-mode signal, effective signal is amplified and brushing choosing；The ratio of resistance R37 and resistance R38 are set
Value is the amplification factor of second operational amplifier U8B, and the signal that 1 foot of output end of the first operational amplifier U8A is exported is sent into
6 foot of input cathode (INB-) of second operational amplifier U8B, according to 5 foot of input anode of second operational amplifier U8B
(INB+) benchmark carries out voltage comparison, and useful digital signal is exported from 7 foot of output end (OUTB) of second operational amplifier U8B
To 14 foot of acquisition data signal input of CPU serial ports.
CPU by the communication modes such as GPRS/ Ethernet upload table end data to meter reading platform or can be shown in local
On display screen.
The foregoing is merely the technical concepts and features of utility model, practical new its object is to allow people that can understand this
The content of type is simultaneously implemented accordingly, does not limit the protection scope of the present invention.It is all according to the main skill of the utility model
The equivalent transformation or modification that the Spirit Essence of art scheme is done, should all cover within the scope of the utility model.
Claims (5)
1. a kind of M-Bus main website multi-channel intelligent meter reading remote transmission device, characterized by comprising:
Meter reading platform/local meter reading operational module, CPU, 13/36V meter reading signal modulation module, double operational differential data acquisition solution
Analog-to-digital conversion module, multiple intelligent channel modules are adjusted, the table end that connects of each intelligent channel is accordingly connected with multiple tables；Meter reading is flat
The meter reading request signal input terminal of platform/local meter reading operational module meter reading request signal output end connection CPU；Each intelligence of CPU
Can channel switch control terminal connect one to one the switch control signal input terminal of corresponding intelligent channel；The meter reading of CPU controls letter
The meter reading control signal input of number output end connection 13/36V meter reading signal modulation module, CPU's is defeated to meter reading address signal
Outlet connect 13/36V meter reading signal modulation module to meter reading address signal input terminal；13/36V meter reading signal modulation module
Mbus- modulated signal output end connects the Mbus- modulated signal input terminal of each intelligent channel simultaneously；The bus of each intelligent channel
Output end connects the bus input end of corresponding multiple tables simultaneously, and total line output terminal of each table connects corresponding intelligent channel jointly
Bus input end；The Mbus+ modulated signal output end of each intelligent channel connects double operational differential data acquisition demodulation modulus jointly
The Mbus+ modulated signal input terminal of conversion module；The acquisition data difference of double operational differential data acquisition demodulation analog-to-digital conversion module
Divide the acquisition data signal input of amplified signal output end connection CPU；The acquisition data signal output connection meter reading of CPU is flat
Platform/local meter reading operational module acquisition data signal input.
2. M-Bus main website multi-channel intelligent meter reading remote transmission device as described in claim 1, it is characterised in that: described 13/
36V meter reading signal modulation module includes 36V power supply chip, for providing 36V regulated power supply；13/36V meter reading signal modulation module
Further include MBUS- modulated signal output circuit: the first end of the 7th resistance connection CPU to meter reading address signal output end, the
The second end of seven resistance connects the base stage of the 2nd NPN triode, the base stage of the second end and the 2nd NPN triode of the 7th resistance
Intermediate contact also passes through the 9th resistance eutral grounding；The emitter of 2nd NPN triode is grounded, and the collector of the 2nd NPN triode connects
The first end of the 4th resistance is connect, the second end of the 4th resistance connects the grid of the first metal-oxide-semiconductor, and the drain electrode of the first metal-oxide-semiconductor connects 36V
Power supply, the 36V power supply are provided by power supply chip U4, and first diode and the 5th resistance constitute the first parallel circuit, and first is in parallel
It is electrically connected between 36V power supply and the second end of the 4th resistance, the second end of anode the 4th resistance of connection of first diode,
First parallel circuit is additionally attached between the drain electrode of the first metal-oxide-semiconductor and its grid, anode the first metal-oxide-semiconductor of connection of first diode
Grid, the source electrode of the first metal-oxide-semiconductor connects the anode of the 4th diode, and the cathode of the 4th diode connects the leakage of the second metal-oxide-semiconductor
Pole, is also connected with the second parallel circuit between the drain electrode of the second metal-oxide-semiconductor and its grid, the second parallel circuit by the 5th diode with
Thirteenth resistor parallel connection is constituted, the grid of anode the second metal-oxide-semiconductor of connection of the 5th diode；The anode of 4th diode also passes through
Third diode, the second diode connect 13V power supply；The source electrode of second metal-oxide-semiconductor is logical to intelligence for exporting Mbus- modulated signal
The Mbus- modulated signal input terminal in road；The grid of second metal-oxide-semiconductor connects the collector of the 9th triode by the 19th resistance,
The emitter of 9th triode is grounded, and the base stage of the 9th triode connects the current collection of the 8th triode by the 27th resistance
Pole, the collector of the 8th triode also pass through the 15th resistance connection CVCC1 power supply, and the emitter of the 8th triode is grounded, the
The base stage of eight triodes connects the collector of the 7th triode, and the collector of the 7th triode also passes through the connection of the 16th resistance
3.3V power supply, the emitter ground connection of the 7th triode, the base stage of the 7th triode connect the meter reading of CPU by the 24th resistance
Control signal output connecting pin.
3. M-Bus main website multi-channel intelligent meter reading remote transmission device as described in claim 1, it is characterised in that: intelligent channel mould
In block: the first end of the 69th resistance is used to connect the corresponding intelligent channel switch control pin of CPU, the 69th resistance
Second end connects the input side cathode of third photoelectrical coupler, and the input side anode of third photoelectrical coupler passes through the 61st electricity
Resistance connection 3.3V power supply, the outlet side collector of third photoelectrical coupler connect CVCC1 power supply, third by the 63rd resistance
The outlet side emitter of photoelectrical coupler connects the base stage of the 16th triode by the 79th resistance, the 16th triode
Collector connects the 10th pin of control terminal of third signal relay, the emitter ground connection of the 16th triode；Third signal after
1st pin of electric appliance connects C13V power supply, and the 3rd pin of third signal relay is used to connect the 13/36V meter reading signal
The source electrode of second metal-oxide-semiconductor in modulation module, the Mbus- tune come for receiving the 13/36V meter reading signal modulation module conveying
Signal processed；4th pin of third signal relay issues the first end of bus M2- by the connection of the 11st inductance magnetic bead, issues
What the second end of bus M2- connected the needed meter reading of the group simultaneously issues address signal input terminal；The needed meter reading of the group it is upper
It passes signal output end and passes through the second end of upload the tenth inductance magnetic bead of bus M2+ connection, the first end connection of the tenth inductance magnetic bead
The 7th pin of third signal relay K3, the 8th pin of third signal relay K3 is for exporting comprising currently to meter reading data
Signal and currently to the Mbus+ modulated signal of meter reading address signal, the 8th pin of third signal relay K3 is described for connecting
The Mbus+ modulated signal input terminal of double operational differential data acquisition demodulation analog-to-digital conversion module.
4. M-Bus main website multi-channel intelligent meter reading remote transmission device as described in claim 1, it is characterised in that: the double operational
In differential data acquisition demodulation analog-to-digital conversion module, Mbus+ modulated signal input pin connects two paths of signals transmission electricity simultaneously
Road:
The first via connects the first end of the 23rd capacitor, and the second tunnel connects the first end of the 47th resistance；
The first via: the second end of the 23rd capacitor is grounded after concatenating the 43rd resistance, the 23rd capacitor and the 43rd
Resistance constitutes the first bandpass filter；
The second end of 23rd capacitor connects the first end of the 21st capacitor, the second end concatenation the 4th of the 21st capacitor
It is grounded after 12 resistance, the 21st capacitor and the 42nd resistance constitute the second bandpass filter；
The input cathode of the first operational amplifier is accessed after second end the 41st resistance of concatenation of 21st capacitor；First
The 39th feedback resistance is connected between the input cathode and output end of operational amplifier；
Second tunnel: the second end of the 47th resistance is grounded after connecting the 51st resistance, and the second end of the 47th resistance is also
Connect the first end of the 24th capacitor；
The second end of 24th capacitor is grounded after concatenating the 56th resistance, and the 24th capacitor and the 56th resistance are constituted
Third bandpass filter；
The second end of 24th capacitor is also connected with the first end of the 25th capacitor, the second end concatenation of the 25th capacitor the
It is grounded after 54 resistance, the 25th capacitor and the 54th resistance constitute the 4th bandpass filter；
The input anode of the first operational amplifier, the first fortune are accessed after second end the 50th resistance of concatenation of 25th capacitor
The input anode of calculation amplifier is grounded after also concatenating the 55th resistance；
The output end of first operational amplifier concatenates the input cathode of access second operational amplifier after the 37th resistance, the
The feed resistance of third eighteen incompatibilities, the input of second operational amplifier are connected between the input cathode and output end of two operational amplifiers
Plus earth is held, the output end of second operational amplifier is used to connect the acquisition data signal input of CPU.
5. M-Bus main website multi-channel intelligent meter reading remote transmission device as claimed in claim 1 or 2 or 3 or 4, it is characterised in that: institute
The CPU stated uses Atemel processor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822097655.1U CN209028810U (en) | 2018-12-13 | 2018-12-13 | A kind of M-Bus main website multi-channel intelligent meter reading remote transmission device |
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|---|---|---|---|
| CN201822097655.1U CN209028810U (en) | 2018-12-13 | 2018-12-13 | A kind of M-Bus main website multi-channel intelligent meter reading remote transmission device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109360404A (en) * | 2018-12-13 | 2019-02-19 | 湖南常德牌水表制造有限公司 | A kind of M-Bus main website multi-channel intelligent meter reading remote transmission device and method |
| CN113296436A (en) * | 2021-05-07 | 2021-08-24 | 宁波水表(集团)股份有限公司 | Slave station equipment based on MBUS bus analog circuit |
-
2018
- 2018-12-13 CN CN201822097655.1U patent/CN209028810U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109360404A (en) * | 2018-12-13 | 2019-02-19 | 湖南常德牌水表制造有限公司 | A kind of M-Bus main website multi-channel intelligent meter reading remote transmission device and method |
| CN109360404B (en) * | 2018-12-13 | 2023-08-15 | 湖南常德牌水表制造有限公司 | Multichannel intelligent meter reading remote transmission device and method for M-Bus master station |
| CN113296436A (en) * | 2021-05-07 | 2021-08-24 | 宁波水表(集团)股份有限公司 | Slave station equipment based on MBUS bus analog circuit |
| CN113296436B (en) * | 2021-05-07 | 2022-07-15 | 宁波水表(集团)股份有限公司 | Slave station equipment based on MBUS bus analog circuit |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A multi-channel intelligent meter reading remote transmission device for M-BUS master station Effective date of registration: 20220118 Granted publication date: 20190625 Pledgee: Agricultural Bank of China Limited Changde branch Pledgor: HUNAN CHANGDE WATER METER MANUFACTURE Co.,Ltd. Registration number: Y2022980000559 |
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