CN109754591A - A kind of kilowatt meter reading-out system and meter register method - Google Patents
A kind of kilowatt meter reading-out system and meter register method Download PDFInfo
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- CN109754591A CN109754591A CN201811569897.4A CN201811569897A CN109754591A CN 109754591 A CN109754591 A CN 109754591A CN 201811569897 A CN201811569897 A CN 201811569897A CN 109754591 A CN109754591 A CN 109754591A
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Abstract
The invention discloses a kind of kilowatt meter reading-out system and meter register methods, the system includes: main control module, for sending control instruction to channel selecting module, it controls the channel selecting module and opens specified channel, and the channel by opening sends meter reading instruction to corresponding table end, and sends indication signal to single supply pressure regulator；The single supply pressure regulator, for modulating corresponding voltage according to the indication signal, and the table end address in the indication signal is loaded, table end is sent to by the channel of the opening in the voltage of modulation, so that the corresponding table end in table end address responds the meter reading instruction；Single-ended relatively demodulation analog-to-digital conversion module, for after the table end responds the meter reading instruction, the analog signal at table end described in channel reception by the opening, and by the analog signal processing at digital signal, the digital signal is sent to the main control module；The channel selecting module, including multiple channels for being connected respectively to multiple table ends.
Description
Technical field
The present invention relates to data processing field, a kind of kilowatt meter reading-out system and meter register method are particularly related to.
Background technique
With the continuous development of water, electricity, gas, hotlist intelligent terminal, various data transfer modes are continuously emerged.Traditional
TTL (Transistor-Transistor Logic, logic gates) cannot achieve telecommunication, vulnerable to site environment
Interference so that data are easy to appear dislocation in transmission, and need to provide power supply line, RS485 is communicated and also needed power supply
Line not only substantially increases construction cost, but also not convenient for safeguarding, high failure rate, load capacity is weak.Traditional M-Bus
(symphonic mbus, long-distance meter-reading system) technology two-wire system carries out the mode of data communication, and there are voltage instability, bands
The defects of loading capability is weak.
Summary of the invention
In view of this, it is an object of the invention to propose a kind of kilowatt meter reading-out system and meter register method.
Based on a kind of above-mentioned purpose kilowatt meter reading-out system provided by the invention, comprising:
It is specified to control the channel selecting module opening for sending control instruction to channel selecting module for main control module
Channel, and by open channel to corresponding table end send meter reading instruction, and to single supply pressure regulator send instruction letter
Number；
The single supply pressure regulator, connect with the main control module and the channel selecting module, for according to
Indication signal modulates corresponding voltage, and the table end address load in the indication signal is passed through institute in the voltage of modulation
It states open channel and is sent to table end, so that the corresponding table end in table end address responds the meter reading instruction；
Single-ended relatively demodulation analog-to-digital conversion module, connect with the main control module and the channel selecting module, is used for
After the table end responds meter reading instruction, the analog signal at table end described in the channel reception by the opening, and by institute
Analog signal processing is stated into digital signal, the digital signal is sent to the main control module；
The channel selecting module, including multiple channels for being connected respectively to multiple table ends.
In one embodiment, the single supply pressure regulator includes:
Triode, the indication signal sent for receiving the main control module, and led according to the variation of the indication signal
Logical or cut-off；
Voltage regulation unit, for the on or off according to the triode, modulation obtains different voltage.
In one embodiment, the single-ended relatively demodulation analog-to-digital conversion module includes:
Bandpass filtering unit filters out for the interference signal in the analog signal to the table end, is effectively believed
Number；
Operation amplifier unit is connect with the bandpass filtering unit, for the useful signal to be amplified, and will
Amplified signal is compared with setting signal carries out voltage；
Converting unit is connect with the operation amplifier unit, for being converted according to comparison result, obtains digital letter
Number.
In one embodiment, the channel of the channel selecting module includes:
Relay, for the opening when receiving the control signal, and based on the table end address in the control signal
Open corresponding channel；It is also used to the closing when not receiving control signal, and closing passage.
The embodiment of the invention also provides a kind of meter register methods, applied in above-mentioned system, comprising:
The main control module sends control instruction to the channel selecting module, controls the channel selecting module and opens
Specified channel, and the channel by opening sends meter reading instruction to corresponding table end, the main control module is also to single electricity
Source pressure regulator sends indication signal；
The single supply pressure regulator modulates corresponding voltage according to the indication signal, by the table in the indication signal
The load of end address is sent to the table end by the channel of the opening in the voltage of modulation, so that table end address pair
The table end answered responds the meter reading instruction；
After the single-ended relatively demodulation analog-to-digital conversion module responds the meter reading instruction at the table end, beaten by described
The analog signal at table end described in the channel reception opened, by the analog signal processing at digital signal, and by the digital signal
It is sent to the main control module.
In one embodiment, the single supply pressure regulator modulates corresponding voltage according to the indication signal, comprising:
The triode receives the indication signal, according to the indication signal on or off；
The voltage regulation unit is modulated according to the on or off of the triode and obtains different voltage.
In one embodiment, the single-ended relatively modulation analog-to-digital conversion module believes the analog signal processing at number
Number, comprising:
The bandpass filtering unit filters out the interference signal in the analog signal at the table end, is effectively believed
Number；
The operation amplifier unit amplifies the useful signal, and by amplified signal and setting signal into
The comparison of row voltage；
The converting unit is converted according to comparison result, obtains digital signal.
In one embodiment, the method also includes:
Relay opening when receiving the control signal, and based on the table end address in the control signal
Open corresponding channel；The closing when not receiving control signal, and closing passage.
From the above it can be seen that kilowatt meter reading-out system provided by the invention and meter register method, it is adjustable to have a voltage output,
Range of regulation is wide, and stability is good, and noise is low, and Ripple Suppression is than high, the advantages that load capacity is strong.Using single supply power supply and
Multichannel reading technique not only optimizes the structure for M-Bus meter reading circuit, reduces the dosage of electronic component, reduces and produces
The cost of product only powers to downlink meter in meter reading, reduces overall power, increases adaptability, the meter reading of site environment
Load capacity.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the kilowatt meter reading-out system that one embodiment of the invention provides；
Fig. 2 is the structural schematic diagram for the single supply pressure regulator that one embodiment of the invention provides；
Fig. 3 is the structural schematic diagram that the single-ended comparison that one embodiment of the invention provides demodulates analog-to-digital conversion module；
Fig. 4 is the structural schematic diagram for the channel selecting module that one embodiment of the invention provides；
Fig. 5 is the structural schematic diagram for the main control module that one embodiment of the invention provides.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and join
According to attached drawing, the present invention is described in more detail.
It should be noted that all statements for using " first " and " second " are for distinguishing in the embodiment of the present invention
Two non-equal entities of same names or non-equal parameter, it is seen that " first " " second " only for statement convenience, no
It is interpreted as the restriction to the embodiment of the present invention, subsequent embodiment no longer illustrates this one by one.
Fig. 1 is a kind of structural schematic diagram of kilowatt meter reading-out system provided in this embodiment, as shown in Figure 1, the kilowatt meter reading-out system can be with
It include: main control module 10, single supply pressure regulator 20, single-ended relatively demodulation analog-to-digital conversion module 30 and channel selecting module 40.
Wherein, main control module 10 is used to send control instruction to channel selecting module 40, and control channel selecting module 40 is beaten
Specified channel is opened, meter reading instruction, the also Xiang Dan electricity of main control module 10 are then sent to corresponding table end 50 by the channel opened
Source pressure regulator 20 sends indication signal.
Single supply pressure regulator 20 is connect with main control module 10, channel selecting module 40, for being connect by TXD_MBUS pin
The indication signal that main control module 10 is sent is received, based on the voltage of M-Bus protocol modulation corresponding 12V and 36V, and by table
Location loads inside the voltage of modulation, is sent to table end 50 by open channel, so that the corresponding table end response in table end address
Meter reading instruction.
Single-ended relatively demodulation D/A converter module 30 is connect with main control module 10, channel selecting module 40, at table end
It after 50 pairs of meter reading instructions carry out response, is acquired and handles by analogue data of the open channel to table end 50, and will
The digital signal obtained after processing is exported to main control module 10.
Fig. 2 is the structural schematic diagram for the single supply pressure regulator that one embodiment of the invention provides, as shown in Fig. 2, single supply tune
Depressor 20, specifically includes that triode and voltage regulation unit.
Wherein, triode can be used for receiving the indication signal of the transmission of main control module 10, and according to the variation of indication signal
On or off；Voltage regulation unit is modulated according to the on or off of triode and obtains different voltage.
In one embodiment, voltage regulation unit can be the variable integrated three-terminal regulator block LM317 of output voltage (in Fig. 2
U015), triode N50, in addition, it can include pressure regulation adjusts resistance (R0224, R0221 and R0240 in Fig. 2).
Wherein, the output voltage of regulator block LM317 can be calculated by following formula,
Vo=1.25 (1+R0224*R0240/ (R0224+R0240) R0221) (1)
In the present embodiment, in the output voltage calculation formula as regulated power supply, the resistance value of R0224 and R0221 are pre-
It first sets, cannot arbitrarily change.
The variation range of the output voltage of regulator block is: Vo=1.25V-37V
Due to regulator block such as LM317HVA, LM317HVK etc. of high output voltage, the variation range of output voltage is Vo
=1.25V-45V, so the ratio range of R0224*R0240/ (R0224+R0240) R0221 in formula (1) can only be 0-
28.6。
When main control module 10 sends meter reading instruction to table end 50 according to CJ/T188 or other specifications, while Xiang Dan electricity
Source pressure regulator 20 sends indication signal, which enters N50 triode from the end TXD_MBUS of single supply pressure regulator 20.
Since each table address corresponds to a unique frame signal, thus the signal is variation, and N50 triode is according to the change of signal
Change on or off.When N50 triode ON, it is equivalent to R0224 and R0240 and is parallel to ground, U015 voltage swing is defeated at this time
The partial pressure in parallel with R0224 and R0240 according to R0221 confirms out, and when N50 triode ends, it is outstanding to be equivalent to resistance R0240
Sky, the output of U015 voltage swing at this time confirms according to R0221 and R0224 and partial pressure, to obtain required 12V and 36V
Voltage output.
By the way of voltage modulated, specifically change the voltage modulated and bus current remains unchanged, M-Bus bus
Standard regulation, when main control module 10 sends ' 1 ', output bus voltage is 36V by main control module 10, i.e., plays N50 triode
It opens, when main control module 10 sends ' 0 ', the bus voltage of output is reduced to 12V, both closed N50 triode.Table end 50 is logical
The voltage change for crossing the modulation voltage that detection single supply pressure regulator 20 is sent, loads and identifies table in the voltage of variation
Address is held, the meter reading of main control module 10 could be indicated to respond, and the data at table end are uploaded to single-ended relatively solution mode transfer
Number conversion module 30.
Fig. 3 is the structural schematic diagram for the single-ended comparison demodulation analog-to-digital conversion module that one embodiment of the invention provides, such as Fig. 3
Shown, single-ended relatively demodulation analog-to-digital conversion module 30 specifically includes that inductance capacitance LC (L43/C082) and resistance capacitance RC
(R0235/C080) bandpass filtering unit, single ended input zoom comparison (U014) unit (operation amplifier unit), conduct formed
The N48 triode of converting unit.
After table end 50 responds the meter reading request that main control module 10 issues, uploaded by the port MBUS- in channel
The analog signal of table end response.The high-pass filtering that the analog signal is made up of inductance L43 and capacitor C082, using resistance
The low-pass filtering that R0235 and capacitor C080 is constituted, carries out filtering out for interference signal, then will filter out and interferes what is obtained later to have
Effect signal is input to the VIN+ signal pins of single ended input zoom comparison unit U014, then the signal and VIN- of VIN+ signal pins
The signal of signal pins carries out voltage comparison and amplifies useful signal by the amplification of U014 itself and compare, and exports
Corresponding low and high level exports the B of the N48 triode to single-ended relatively demodulation analog-to-digital conversion module 30 by resistance R0233
Base controls the on and off of N48 triode with this, to form the digital signal that main control module 10 can identify, and exports
The digital signal is to main control module 10.The analog signal at table end 50 is converted into digital signal to realize, stablizes and receives table end
50 data uploaded, reach stable meter reading.
The structural schematic diagram in the channel for the channel selecting module 40 that one embodiment of the invention shown in Fig. 4 provides, such as Fig. 4 institute
Show, channel selecting module 40 includes multiple channels, is connected with multiple table ends 50 on each channel, is shown in FIG. 1 every
Channel connects three table ends, actually also can connect the table end of other numbers.Channel is mainly by K3 relay, for being isolated
The composition such as OP3 optocoupler of main control module 10.When main control module 10 does not issue meter reading instruction, relay K3 is turned off, institute
There is channel all to close, so that Overall Power Consumption is reduced, when main control module 10 issues meter reading instruction, according to table end archives, channel meeting
Corresponding channel is automatically opened according to table end address, to realize single meter reading or more meter readings.Wherein table end archives are packets
Archives containing table end address and corresponding channel information, channel is according to the table end address in meter reading instruction, by searching for table end
Archives can obtain corresponding channel information.
Fig. 5 is the structural schematic diagram for the main control module that one embodiment of the invention provides.
One embodiment of the invention additionally provides meter register method, which is applied in above-mentioned kilowatt meter reading-out system, including with
Lower step:
Step 10, main control module 10 send control instruction to channel selecting module 40, and control channel selecting module 40 is opened
Specified channel, and the channel by opening sends meter reading instruction to corresponding table end, main control module 10 is also to single supply pressure regulation
Device 20 sends indication signal；
Step 20, single supply pressure regulator 20 modulate corresponding voltage according to indication signal, by the table end in indication signal
Location loads in the voltage of modulation, is sent to table end by open channel, so that the corresponding table end in table end address responds meter reading
Instruction；
Step 30, single-ended relatively demodulation analog-to-digital conversion module are connect after the response meter reading instruction of table end by open channel
The analog signal for receiving table end, by analog signal processing at digital signal, and is sent to main control module for digital signal.
Specifically, in step 20, the triode of single supply pressure regulator 20 receives indication signal, according to indication signal
On or off；
Voltage regulation unit is modulated according to the on or off of triode and obtains different voltage.
In step 30, bandpass filtering unit filters out the interference signal in the analog signal at table end, obtains effectively
Signal；
Operation amplifier unit amplifies useful signal, and amplified signal and setting signal are carried out voltage
Compare；
Converting unit is converted according to comparison result, obtains digital signal.
In one embodiment, the relay of channel selecting module 40 opening when receiving control signal, and based on control
Open corresponding channel in table end address in signal；The closing when not receiving control signal, and closing passage.
Kilowatt meter reading-out system provided by the invention, has that voltage output is adjustable, and range of regulation is wide, and stability is good, and noise is low,
Ripple Suppression is than high, the advantages that load capacity is strong.Using single supply power supply and multichannel reading technique, not only optimizes and be directed to
The structure of M-Bus meter reading circuit, reduces the dosage of electronic component, reduces the cost of product, only in meter reading to downlink meter
Power supply reduces overall power, increases the adaptability of site environment, the load capacity of meter reading.
It should be understood by those ordinary skilled in the art that: the discussion of any of the above embodiment is exemplary only, not
It is intended to imply that the scope of the present disclosure (including claim) is limited to these examples；Under thinking of the invention, above embodiments
Or can also be combined between the technical characteristic in different embodiments, step can be realized with random order, and be existed such as
Many other variations of the upper different aspect of the invention, for simplicity, they are not provided in details.
In addition, to simplify explanation and discussing, and in order not to obscure the invention, in provided attached drawing
It can show or can not show and be connect with the well known power ground of integrated circuit (IC) chip and other components.In addition,
Device can be shown in block diagram form, to avoid obscuring the invention, and this has also contemplated following facts, i.e.,
The details of embodiment about these block diagram arrangements be height depend on will implementing platform of the invention (that is, these are thin
Section should be completely within the scope of the understanding of those skilled in the art).Detail (for example, circuit) is being elaborated to describe
In the case where exemplary embodiment of the present invention, it will be apparent to those skilled in the art that can there is no these
Implement the present invention in the case where detail or in the case that these details change.Therefore, these descriptions should be recognized
To be illustrative rather than restrictive.
Although having been incorporated with specific embodiments of the present invention, invention has been described, according to retouching for front
It states, many replacements of these embodiments, modifications and variations will be apparent for those of ordinary skills.Example
Such as, discussed embodiment can be used in other memory architectures (for example, dynamic ram (DRAM)).
What the embodiment of the present invention was intended to cover fall within the broad range of appended claims all such replaces
It changes, modifications and variations.Therefore, all within the spirits and principles of the present invention, any omission for being made, modification, equivalent replacement,
Improve etc., it should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of kilowatt meter reading-out system characterized by comprising
Main control module controls the channel selecting module and opens specified lead to for sending control instruction to channel selecting module
Road, and the channel by opening sends meter reading instruction to corresponding table end, and sends indication signal to single supply pressure regulator；
The single supply pressure regulator, connect with the main control module and the channel selecting module, for according to the instruction
The corresponding voltage of signal modulation, and the table end address load in the indication signal is passed through into the opening in the voltage of modulation
Channel be sent to table end so that the corresponding table end in table end address responds the meter reading instruction；
Single-ended relatively demodulation analog-to-digital conversion module, connect, in institute with the main control module and the channel selecting module
It states after table end responds meter reading instruction, the analog signal at table end described in the channel reception by the opening, and by the mould
Intend signal processing into digital signal, the digital signal is sent to the main control module；
The channel selecting module, including multiple channels for being connected respectively to multiple table ends.
2. kilowatt meter reading-out system according to claim 1, which is characterized in that the single supply pressure regulator includes:
Triode, the indication signal sent for receiving the main control module, and according to the variation of indication signal conducting or
Cut-off；
Voltage regulation unit, for the on or off according to the triode, modulation obtains different voltage.
3. kilowatt meter reading-out system according to claim 1, which is characterized in that the single-ended relatively demodulation analog-to-digital conversion module packet
It includes:
Bandpass filtering unit filters out for the interference signal in the analog signal to the table end, obtains useful signal；
Operation amplifier unit is connect with the bandpass filtering unit, for the useful signal to be amplified, and will be after amplification
Signal with setting signal carry out voltage compared with；
Converting unit connect with the operation amplifier unit, for being converted according to comparison result, obtains digital signal.
4. kilowatt meter reading-out system according to claim 1, which is characterized in that the channel of the channel selecting module includes:
Relay is opened for the opening when receiving the control signal, and based on the table end address in the control signal
Corresponding channel；It is also used to the closing when not receiving control signal, and closing passage.
5. a kind of meter register method is applied in the described in any item systems of claim 1-4 characterized by comprising
The main control module sends control instruction to the channel selecting module, controls what the channel selecting module opening was specified
Channel, and the channel by opening sends meter reading instruction to corresponding table end, the main control module is also to the single supply pressure regulation
Device sends indication signal；
The single supply pressure regulator modulates corresponding voltage according to the indication signal, by the table end address in the indication signal
Load is sent to the table end by the channel of the opening in the voltage of modulation, so that the corresponding table end in table end address
Respond the meter reading instruction；
After the single-ended relatively demodulation analog-to-digital conversion module responds the meter reading instruction at the table end, pass through the logical of the opening
Road receives the analog signal at the table end, by the analog signal processing at digital signal, and the digital signal is sent to
The main control module.
6. according to the method described in claim 5, it is characterized in that, the single supply pressure regulator is modulated according to the indication signal
Corresponding voltage, comprising:
The triode receives the indication signal, according to the indication signal on or off；
The voltage regulation unit is modulated according to the on or off of the triode and obtains different voltage.
7. according to the method described in claim 5, it is characterized in that, the single-ended analog-to-digital conversion module that relatively demodulates is by the mould
Intend signal processing into digital signal, comprising:
The bandpass filtering unit filters out the interference signal in the analog signal at the table end, obtains useful signal；
The operation amplifier unit amplifies the useful signal, and amplified signal and setting signal are carried out voltage
Comparison；
The converting unit is converted according to comparison result, obtains digital signal.
8. according to the method described in claim 5, it is characterized in that, the method also includes:
Relay opening when receiving the control signal, and based on the table end address opening pair in the control signal
The channel answered；The closing when not receiving control signal, and closing passage.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811569897.4A CN109754591A (en) | 2018-12-21 | 2018-12-21 | A kind of kilowatt meter reading-out system and meter register method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811569897.4A CN109754591A (en) | 2018-12-21 | 2018-12-21 | A kind of kilowatt meter reading-out system and meter register method |
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