CN209471558U - A kind of kilowatt meter reading-out system - Google Patents
A kind of kilowatt meter reading-out system Download PDFInfo
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- CN209471558U CN209471558U CN201822186132.4U CN201822186132U CN209471558U CN 209471558 U CN209471558 U CN 209471558U CN 201822186132 U CN201822186132 U CN 201822186132U CN 209471558 U CN209471558 U CN 209471558U
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- meter reading
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Abstract
The utility model discloses a kind of kilowatt meter reading-out systems, 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 utility model relates to data processing fields, particularly relate to a kind of kilowatt meter reading-out system.
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, band carries
The defects of ability is weak.
Utility model content
In view of this, the purpose of this utility model is that proposing a kind of kilowatt meter reading-out system.
Based on a kind of above-mentioned purpose kilowatt meter reading-out system provided by the utility model, 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 indication signal；
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 in the indication signal is loaded in the voltage of modulation by described
The channel of opening 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 amplifying the useful signal, and will be put
Signal after big 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.
From the above it can be seen that kilowatt meter reading-out system provided by the utility model, it is adjustable to have a voltage output, range of regulation
Width, 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 meter reading
Technology not only optimizes the structure for M-Bus meter reading circuit, reduces the dosage of electronic component, reduces the cost of product, only
It powers in meter reading to downlink meter, reduces overall power, increase the adaptability of site environment, the load capacity of meter reading.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the kilowatt meter reading-out system that an embodiment of the present invention provides；
Fig. 2 is the structural schematic diagram for the single supply pressure regulator that an embodiment of the present invention provides；
Fig. 3 is the structural schematic diagram that the single-ended comparison that an embodiment of the present invention provides demodulates analog-to-digital conversion module；
Fig. 4 is the structural schematic diagram for the channel selecting module that an embodiment of the present invention provides；
Fig. 5 is the structural schematic diagram for the main control module that an embodiment of the present invention provides
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, below in conjunction with specific embodiment, and
Referring to attached drawing, the utility model is further described.
It should be noted that all statements for using " first " and " second " are for area in the utility model embodiment
Be divided to two non-equal entities of same names or non-equal parameter, it is seen that " first " " second " only for statement convenience,
It should not be construed as the restriction to the utility model embodiment, 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 address
Load is sent to table end 50 by open channel inside the voltage of modulation, so that the corresponding table end response in table end address is copied
Table 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 an embodiment of the present invention provides, as shown in Fig. 2, single electricity
Source pressure regulator 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 variation of signal
On or off.When N50 triode ON, it is equivalent to R0224 and R0240 and is parallel to ground, the at this time output of U015 voltage swing
The partial pressure in parallel with R0224 and R0240 according to R0221 confirm, 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., opens N50 triode,
When main control module 10 sends ' 0 ', the bus voltage of output is reduced to 12V, both closed N50 triode.Table end 50 passes through inspection
The voltage change for the modulation voltage that single supply pressure regulator 20 is sent is surveyed, in the voltage of variation with loading and identify table end
Location could indicate to respond to the meter reading of main control module 10, and the data at table end are uploaded to single-ended relatively demodulation modulus and are turned
Change the mold block 30.
Fig. 3 is the structural schematic diagram for the single-ended comparison demodulation analog-to-digital conversion module that an embodiment of the present invention provides, such as
Shown in Fig. 3, 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 are constituted, carries out filtering out for interference signal, then will filter out obtain after interference it is effective
Signal is input to the VIN+ signal pins of single ended input zoom comparison unit U014, then signal Yu the VIN- letter of VIN+ signal pins
The signal of number foot carries out voltage comparison and amplifies useful signal by the amplification of U014 itself and compare, and output phase is answered
Low and high level, by resistance R0233 export to it is single-ended relatively demodulation analog-to-digital conversion module 30 N48 triode B base, with this
The on and off of N48 triode is controlled, to form the digital signal that main control module 10 can identify, and exports number letter
Number give main control module 10.The analog signal at table end 50 is converted into digital signal to realize, stablizes and receives what table end 50 uploaded
Data reach stable meter reading.
The structural schematic diagram in the channel for the channel selecting module 40 that an embodiment of the present invention shown in Fig. 4 provides, such as Fig. 4
Shown, 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 to include
There are the archives of table end address and corresponding channel information, channel is according to the table end address in meter reading instruction, by searching for table end shelves
Case can obtain corresponding channel information.
Fig. 5 is the structural schematic diagram for the main control module that an embodiment of the present invention provides.
An embodiment of the present invention additionally provides meter register method, which is applied in above-mentioned kilowatt meter reading-out system, packet
Include following steps:
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, led according to indication signal
Logical or cut-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 to the ratio of voltage
Compared with；
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 utility model, has that voltage output is adjustable, and range of regulation is wide, and stability is good, noise
Low, Ripple Suppression is than high, the advantages that load capacity is strong.Using single supply power supply and multichannel reading technique, needle is not only optimized
To the structure of M-Bus meter reading circuit, the dosage of electronic component is reduced, reduces the cost of product, only in meter reading to downlink table
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 the thinking of the utility model, the above reality
Applying can also be combined between the technical characteristic in example or different embodiments, and step can be realized with random order, and be deposited
In many other variations of the different aspect of the utility model as described above, for simplicity, they are not provided in details.
In addition, to simplify explanation and discussing, and in order not to which the utility model indigestion can be made, in provided attached drawing
In can show or can not show and 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 making the utility model indigestion, and this has also contemplated following facts,
Details i.e. about the embodiment of these block diagram arrangements be height depend on will implement the utility model platform (that is,
These details should be completely within the scope of the understanding of those skilled in the art).Elaborate detail (for example, circuit) with
In the case where the exemplary embodiment for describing the utility model, it will be apparent to those skilled in the art that can be
Without implementing the utility model in the case where these details or in the case that these details change.Therefore, this
A little descriptions should be considered as illustrative rather than restrictive.
Although having been incorporated with specific embodiment of the utility model the utility model is described, before
The description in face, many replacements of these embodiments, modifications and variations will be apparent for those of ordinary skills
's.For example, discussed embodiment can be used in other memory architectures (for example, dynamic ram (DRAM)).
The embodiments of the present invention are intended to cover fall into all such within the broad range of appended claims
Replacement, modifications and variations.Therefore, within the spirit and principle of the utility model, any omission for being made, modification, equivalent
Replacement, improvement etc., should be included within the scope of protection of this utility model.
Claims (4)
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 indication signal；
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 the indication signal, 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.
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| CN201822186132.4U CN209471558U (en) | 2018-12-21 | 2018-12-21 | A kind of kilowatt meter reading-out system |
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| CN201822186132.4U CN209471558U (en) | 2018-12-21 | 2018-12-21 | A kind of kilowatt meter reading-out system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109754591A (en) * | 2018-12-21 | 2019-05-14 | 湖南常德牌水表制造有限公司 | A kind of kilowatt meter reading-out system and meter register method |
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- 2018-12-21 CN CN201822186132.4U patent/CN209471558U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109754591A (en) * | 2018-12-21 | 2019-05-14 | 湖南常德牌水表制造有限公司 | A kind of kilowatt meter reading-out system and meter register method |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A meter reading system Effective date of registration: 20220118 Granted publication date: 20191008 Pledgee: Agricultural Bank of China Limited Changde branch Pledgor: HUNAN CHANGDE WATER METER MANUFACTURE Co.,Ltd. Registration number: Y2022980000559 |