CN206876240U - Intelligent metering instrument with NB IoT communication modules - Google Patents
Intelligent metering instrument with NB IoT communication modules Download PDFInfo
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- CN206876240U CN206876240U CN201720704091.6U CN201720704091U CN206876240U CN 206876240 U CN206876240 U CN 206876240U CN 201720704091 U CN201720704091 U CN 201720704091U CN 206876240 U CN206876240 U CN 206876240U
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Abstract
The utility model provides the intelligent metering instrument with NB IoT communication modules, belong to measuring instrument field, main control chip is provided with intelligent metering instrument, NB IoT communication modules and voltage collection circuit are connected with main control chip, voltage collection circuit is provided with input and output end, input is connected with lithium battery, and output end is connected with control terminal, sampling end respectively.By setting up voltage collection circuit, the voltage of lithium battery is monitored in real time by the partial pressure device in voltage collection circuit and filtering device, so that the section according to residing for voltage is different, take targetedly measure, reduce the number that dismounting intelligent metering instrument changes lithium battery, frequent detachment is avoided to cause the damage of intelligent metering instrument, so as to extend the service life of intelligent metering instrument.
Description
Technical field
The utility model belongs to measuring instrument field, more particularly to the intelligent metering instrument with NB-IoT communication modules.
Background technology
Because science and technology is more and more flourishing, the world enters the Internet of things era, and combustible gas metering arrangement is no exception, wherein being based on
The GPRS of alkaline battery Internet of Things gas meter, flow meter is even more rising star therein.Need to connect by GPRS module after the gathered data of table end
Internet and back-end server communicate to connect, to realize interacting for server and table end, thus can carry out long-range Valve controlling,
The monitoring of each information in table end, cell phone application carry out remote recharge, table end parameter adjusts in real time, and data analysis and exception are automatic
The functions such as alarm.
Small plus alkaline battery capacity because GPRS module transmitting-receiving power consumption is larger, energy density is low, it is necessary to often manually more
Battery is changed, frequently changes battery, this body structure of table can have been damaged, other failures may be caused；Above behavior can drop
The service life of low burn gas meter.
Utility model content
The purpose of this utility model is that providing one kind uses low-power consumption element, so as to the intelligent metering to increase the service life
Instrument.
In order to reach above-mentioned technical purpose, the utility model adopts the following technical scheme that：With NB-IoT communication modules
Intelligent metering instrument, main control chip being provided with the intelligent metering instrument, main control chip is provided with control terminal and sampling end,
NB-IoT communication modules and voltage collection circuit are connected with main control chip, voltage collection circuit is provided with input and output
End, input are connected with lithium battery, and output end is connected with control terminal, sampling end respectively；
Partial pressure device and filtering device are additionally provided with voltage collection circuit.
Optionally, triode Q1 and triode Q4 is provided with the voltage collection circuit, triode Q1 emitter stage connects
Input is connect, triode Q1 colelctor electrode is connected through partial pressure device and filtering device with the sampling end of main control chip, triode Q1
Base stage be connected with triode Q4 colelctor electrode, triode Q4 grounded emitter, triode Q4 base stage and main control chip
Control terminal is connected.
Further, resistance R4 is provided between triode Q1 base stage and triode Q4 colelctor electrode.
Further, resistance R6 is provided between triode Q4 base stage and the control terminal of main control chip.
Further, the partial pressure device is the resistance R1 and R2 of series connection.
Further, the filtering device is the electric capacity C1 for being connected in parallel on resistance R2 both ends.
Further, the lithium battery includes lithium battery monomer, and the electric capacity in parallel with lithium battery monomer.
Further, the voltage collection circuit is used for the voltage that lithium battery is gathered by input, the electricity that will be collected
Pressure is transmitted to main control chip through output end, and obtains the dump energy Cr of lithium battery, and dump energy is preset with main control chip
Threshold value L1, L2, L3,
A) Cr >=L1, is lithium battery normal condition, without any processing under this state；
B) L2 ＜ Cr≤L1, it is the state of low electric quantity of lithium battery, triggers not enough power supply alarm；
C) L3 ＜ Cr≤L2, are electric quantity of lithium battery lock-out state, and electricity indicates flash for prompting；
D) Cr ＜ L3, it is lithium battery power-down state, prompts to change lithium battery.
After adopting the above technical scheme, the utility model has the following advantages that：
1st, the data and server that existing intelligent metering instrument is collected itself by communication module are communicated, from
And long-range Valve controlling, the monitoring of table client information, abnormal telltale lamp function are realized, because communication module uses general alkali electricity
Pond powers, and causes duration of power supply short.The utility model replaces alkaline battery using lithium battery, by lithium battery energy density
Big characteristic, can extend the working time of communication module, and then extend the service life of intelligent metering instrument.Further also
By setting up voltage collection circuit, lithium battery voltage is carried out by the partial pressure device in voltage collection circuit and filtering device real
When monitor, so that the section according to residing for lithium battery voltage is different, take targetedly measure, reduce dismounting intelligent metering instrument
The number of lithium battery is changed, avoids frequent detachment from causing the damage of intelligent metering instrument, so as to extend making for intelligent metering instrument
Use the life-span.By NB-IoT (Narrow Band Internet of Things, arrowband Internet of Things) communication module is used, utilize
NB-IoT low power consumption characteristic, it is also possible that intelligent metering instrument working time extend.
2nd, triode Q1 and triode Q4, triode Q4 and intelligent metering instrument master control core are provided with voltage collection circuit
The control terminal of piece is connected, and so as to the instruction according to main control chip, conducting and cut-off state to triode Q4 are controlled, and then
Conducting, the cut-off state for the triode Q1 being connected with lithium battery are controlled, finally controls the break-make situation of whole voltage collection circuit,
So that being in slave mode to the voltage detecting of lithium battery, the energy loss of lithium battery is avoided.
3rd, by way of resistance R4 is set between triode Q1 and Q4, the electric over the ground of triode Q1 base stages can be reduced
Stream, prevents triode Q1 to be burned out because electric current is excessive.
4th, the current carrying capability of single-chip microcomputer is limited that single-chip microcomputer single I/O port sink current tolerance range in part is in 10-
Between 20mA, maximum upper current limit of bearing is 50mA.Here by triode Q4 base stage and the control terminal of main control chip
Between be provided with resistance R6 mode, main control chip I/O port will be flowed through and the electric current of triode Q4 base stages limited, protection master
While controlling chip, it is also prevented from triode Q4 and is burned.
5th, the purposes of the voltage collection circuit proposed in the present embodiment is that the output voltage of lithium battery is sampled, so as to
It is horizontal in the dump energy that lithium battery is judged according to sampled result, here in order to improve sampling precision, only obtain lithium battery output
The portion voltage of voltage, it is therefore desirable to voltage division processing is carried out to the output voltage of lithium battery using partial pressure device, it is provided herein
Partial pressure device is the resistance R1 and R2 of series connection so that the sampling end of main control chip takes a completion detection from resistance R2.
6th, the principle and structure of partial pressure device are described based on previous item, filtering unit is used to carry out the electric current after partial pressure
Filtering process, the error that interference is brought to main control chip sampled result is reduced, prevent from influenceing voltage detecting precision.
7th, the lithium battery used in the present embodiment is used to provide electric energy to intelligent metering instrument, so that communication module can be with
The external world carries out data transmission.Here lithium battery includes lithium battery monomer and is connected in parallel on the electric capacity at lithium battery monomer both ends, here
Filter action can be played using electric capacity, while in view of the charge and discharge effect that electric capacity itself has, when lithium battery voltage occurs
During fluctuation, it can reduce the fluctuation of lithium battery voltage by the charge and discharge electro ultrafiltration of electric capacity, play the protective effect to lithium battery.
8th, based on the intelligent metering instrument proposed in the present embodiment, the voltage of lithium battery is being obtained by voltage collection circuit
Afterwards, the voltage collected is sent to main control chip through output end, sampling end, in order to which the latter is according to dump energy threshold value knot
Close the voltage collected and subsequent treatment is carried out to intelligent metering instrument, so as to extend the same of intelligent metering instrument service life
When, additionally it is possible to prevent gas leakage etc. from unexpectedly occurring, improve security.
Brief description of the drawings
The utility model is described in further detail below in conjunction with the accompanying drawings：
Fig. 1 is the structural representation one of the intelligent metering instrument described in the utility model with NB-IoT communication modules
Fig. 2 is the structural representation two of the intelligent metering instrument described in the utility model with NB-IoT communication modules；
Fig. 3 is the structural representation of the lithium battery described in the utility model with electric capacity；
Fig. 4 is the structured flowchart of the intelligent metering instrument described in the utility model with NB-IoT communication modules.
Embodiment
To make structure and advantage of the present utility model clearer, structure of the present utility model is made below in conjunction with accompanying drawing
It is further described through.
It should be noted that the intelligent metering instrument described in the embodiment of the present application, including a variety of meters such as gas meter, flow meter, water meter
Scale end.
Embodiment one
As shown in figure 1, the intelligent metering instrument with NB-IoT communication modules that the present embodiment proposes, including master control core
Piece, it is connected with main control chip and realizes the intelligent metering instrument and the extraneous NB-IoT communication modules for carrying out data exchange,
Voltage collection circuit is also associated with main control chip, lithium battery BAT is connected with the input of voltage collection circuit.Actually make
Used time, voltage collection circuit obtain lithium battery BAT voltage, and the adopting through main control chip by the magnitude of voltage after divider filter
Transmit to main control chip at sample end so that current supply circuit of the main control chip according to the data got through control terminal to lithium battery BAT
Break-make be controlled.
Triode Q1 and triode Q4, as shown in Figure 1, triode Q1 emitter stage conduct are provided with voltage collection circuit
The input of voltage collection circuit is connected with lithium battery BAT, and triode Q1 colelctor electrode is through partial pressure device and filtering device and master
The sampling end of control chip is connected, so as to which the lithium battery collected BAT voltage is transmitted to main control chip, in addition, triode
Q1 base stage is connected with triode Q4 colelctor electrode, triode Q4 grounded emitter, triode Q4 base stage and main control chip
Control terminal be connected.
In actual use, voltage collection circuit obtains lithium battery BAT voltage, by triode Q1, then by
Partial pressure device carries out partial pressure, and device is filtered after filtering, and most filtered voltage signal is transmitted to main control chip at last
Sampling end in, so that main control chip is judged based on the voltage signal received；If main control chip judges current lithium electricity
Pond BAT voltage is less than threshold value, then closes down the repertoire of intelligent metering instrument, and by being connected to three poles of itself control terminal
Pipe Q4, control triode Q1, which is in, blocks section, off voltage Acquisition Circuit, prevents fortuitous event.
NB-IoT communication modules used in the present embodiment, it is in Internet of Things (Internet of Things, IoT) field
Emerging technology, low power consuming devices are supported to be connected in the cellular data of wide area network, also referred to as low-power consumption wide area network.NB-IoT branch
Stand-by time length, the efficient connection to network connectivity requirements higher device are held, after using the communication module, extension can be played
The effect of intelligent metering instrument service life.
Typically, the partial pressure device in voltage collection circuit can have a variety of implementations, as shown in Fig. 2 providing here
More conventional implementation is that now resistance R2 is as partial pressure sampling end using the resistance R1 and resistance R2 of series connection.That is three poles
When pipe Q1 is in the conduction state, emitter stage of the lithium battery BAT voltage through triode Q1, colelctor electrode flow through series connection resistance R1 and
Resistance R2, because two resistance are the type of attachment of series connection, therefore different partial pressures can be obtained on resistance R1, resistance R2,
Being achieved in that from resistance R2 for being provided in Fig. 2 carries out voltage sampling, difference that can also be according to main control chip type, resistance
R1, resistance R2 resistances difference, carry out different connected modes and carry out voltage sampling.
Filtering device in voltage collection circuit equally has a variety of implementations, as shown in Fig. 2 providing here more conventional
Implementation to use electric capacity C1.The voltage obtained by partial pressure device is further filtered based on the filtering characteristic of electric capacity
Ripple, eliminate influence when clutter carries out voltage judgement to main control chip.
Difference in view of each element in voltage collection circuit to different size current carrying capacity, in different positions
Also selective is provided with the how individual current-limiting resistance of R4, R6 as shown in Figure 2, prevents subelement from being burnt because the circuit in circuit is excessive
Ruin.
Based on said structure, main control chip can enter according to the voltage sample value after the divider filter got from sampling end
Row judges, different places is carried out when the level residing for the current lithium battery BAT of judgement dump energy, and according to the horizontal difference
Reason measure.
For the consideration for extending intelligent metering meter life, main control chip determines lithium battery residue by voltage collection circuit
The operation of electricity needs to be spaced the fixed cycle.It is more short in electric quantity of lithium battery abundance period, the cycle of the detection operating interval
Temporarily；In electric quantity of lithium battery deficiency period, the cycle of the detection operating interval is longer, can also stop electric power detection if necessary, so as to
The energy expenditure of lithium battery can be reduced, the number that dismounting intelligent metering instrument changes lithium battery is reduced, avoids frequent detachment from leading
The damage of intelligent metering instrument is caused, extends the service life of intelligent metering instrument.
Embodiment two
The intelligent metering instrument with NB-IoT communication modules with voltage collection circuit is proposed in previous embodiment,
Main control chip carries out the content of subsequent treatment according to the voltage of the lithium battery obtained from voltage collection circuit, and the present embodiment is then to upper
Content is stated to be specifically described.
First, lithium battery dump energy is determined：
(1) the independent power consumption of measurement intelligent metering instrument under different conditions, and then determine that intelligent metering instrument is in office
The energy consumption at meaning moment.
(2) initial capacity of lithium battery is combined, obtains dump energy.
The different conditions for the intelligent metering instrument being mentioned in step (1), including P1, liquid crystal display during static operation
P2, telecommunication P3, infrared communication P4, switch valve P5, metering P6, alarm P7, this 8 kinds of intelligent metering instrument of data storage P8 are normal
The working condition seen.
Based on above-mentioned a variety of working conditions, with reference to every kind of working condition duration, intelligent metering instrument can be obtained
The energy consumption Ct expression formulas of any time in the operating condition
In above formula, Pi is i kind working conditions, and Ti, (i ∈ [1,8]) is the duration of every kind of working condition, according to every
Independent power consumption under kind working condition, with reference to every kind of working condition duration, it becomes possible to obtain intelligent metering instrument in work
Make the energy consumption Ct of state lower any time.
In step (2), initial capacity (or being preset capacity) Cb of lithium battery is got in advance, by initial capacity Cb
Subtract each other with energy consumption Ct, obtain dump energy Cr, and then obtain percents of the dump energy Cr relative to initial capacity Cb.
After according to dump energy Cr is got above, according to dump energy Cr and the comparison knot of three dump energy threshold values
Fruit, the electricity of lithium battery is divided into four kinds of states, the dividing mode and corresponding processing mode below according to every kind of state are entered
Row describes in detail.
According to numerical values recited, three dump energy threshold values are followed successively by L1, L2, L3, according to three threshold values by the electricity of lithium battery
Amount is divided into four kinds of states a, b, c, d.
A) Cr >=L1, it is normal condition；
B) L2 ＜ Cr≤L1, it is low battery state；
C) L3 ＜ Cr≤L2, it is electricity lock-out state；
D) Cr ＜ L3, it is power-down state.
The span that above three threshold value can be obtained based on experience value is：
L1 values in 65%~60%,
L2 values in 45%~35%,
L3 values in 15%~5%.
It is corresponding in the presence of four kinds of processing modes after above-mentioned four kinds of states are got, it is as follows：
A) Cr >=L1, is normal condition, without any processing under this state；
B) L2 ＜ Cr≤L1, when electric quantity of lithium battery is from the case that normal condition jumps to low battery, not enough power supply is triggered
Alarm, and alert message is uploaded onto the server table end not enough power supply；
C) L3 ＜ Cr≤L2, when electric quantity of lithium battery is from low battery state transition to electricity lock-out state, shown in button
When, electricity mark can not stop to flash, untill screen dormancy；
D) Cr ＜ L3, when lithium battery from electricity lock-out state be power-down state when, table end institute it is functional all disabling, simultaneously
Close whole valves for being connected with intelligent metering instrument, prevent unexpected generation, now intelligent metering meter life used up, it is necessary to
It could be used after lithium battery is changed.
Embodiment three
Relative to embodiment one, the intelligent metering instrument with NB-IoT communication modules of the proposition of embodiment two, Yi Jigen
Different processing modes is carried out according to dump energy, the present embodiment proposes the lithium battery with electric capacity, and the band based on the latter
There is the intelligent metering instrument of NB-IoT communication modules.
It is high in the both ends shunt capacitance C2 of lithium battery monomer, an electric capacity C2 termination in lithium battery BAT as shown in Figure 3
Level VCC, electric capacity C2 other end ground connection, electric capacity C2 plays the effect of filtering, while electric capacity C2 primarily serves charging and discharging
Effect, when the supply electricity of lithium battery monomer is higher than dump energy threshold value, the electricity having more is absorbed and stored by electric capacity C2,
When the supply electricity of lithium battery monomer is less than dump energy threshold value, electric capacity C2 transmits the electricity release of storage to triode Q1,
And extend lithium battery BAT service life.
Based on the lithium battery shown in Fig. 3, the utility model provides a kind of intelligence with NB-IoT communication modules as shown in Figure 4
Energy measuring instrument, including following module：
NB-IoT communication modules：Realize the remote interaction of table end and server, power hole main control chip controls, and with
Communication between main control chip is to carry out data interaction by Uart transmitting-receiving AT instructions, is the bridge that table end communicates with Server remote
Beam.
Memory module：The important operational factor at storage intelligent metering instrument end, recorded with gas, logout etc..
Infrared communication module：Parameter and record for manually setting and reading table end etc..
Alarm module：Can external detection sensor, monitor whether combustion gas the parameter such as leaks in real time, if any leakage, close immediately
Valve closing door, startup communication will leak out information and upload onto the server.
Power management module：Obtain lithium battery dump energy and reasonable distribution electric quantity consumption and NB modular power sources supply.
Display module：The parameters such as remaining sum, unit price, accumulative gas consumption, time are shown, and have abnormal information in table
When tangent screen show.
Metering module：Analog measurement signal caused by sensor is changed into data signal, often metering is accumulated to certain value
When triggering once storage operation.
Valve control module：Control valve opens and closes, and can close valve by infrared communication, NB-IoT communication settings or permit
Perhaps valve opening instructs, and setting allows valve opening to have to pass through button ability valve opening after instructing.
Key-press module：Operated for data in inquiry table, valve opening etc..
Timing module：One time reference standard at whole table end, as timing upload, event triggering when time according to
According to.
The voltage of lithium battery is monitored in real time by the partial pressure device in voltage collection circuit and filtering device, so as to
Section according to residing for voltage is different, takes targetedly measure, reduces the number that dismounting intelligent metering instrument changes lithium battery,
Frequent detachment is avoided to cause the damage of intelligent metering instrument, so as to extend the service life of intelligent metering instrument.
In addition to above preferred embodiment, the utility model also has other embodiments, and those skilled in the art can root
It is variously modified and deforms according to the utility model, without departing from spirit of the present utility model, the utility model all should be belonged to
Scope defined in appended claims.
Claims (8)
1. the intelligent metering instrument with NB-IoT communication modules, is provided with main control chip, master control in the intelligent metering instrument
Chip is provided with control terminal and sampling end, it is characterised in that the intelligent metering instrument also includes：
Be connected with NB-IoT communication modules and voltage collection circuit on main control chip, voltage collection circuit be provided with input and
Output end, input are connected with lithium battery, and output end is connected with control terminal, sampling end respectively.
2. the intelligent metering instrument according to claim 1 with NB-IoT communication modules, it is characterised in that the voltage
Partial pressure device and filtering device are provided with Acquisition Circuit；
Triode Q1 and triode Q4 are additionally provided with the voltage collection circuit, triode Q1 emitter stage connects input,
Triode Q1 colelctor electrode is connected through partial pressure device and filtering device with the sampling end of main control chip, triode Q1 base stage and three
Pole pipe Q4 colelctor electrode is connected, and triode Q4 grounded emitter, triode Q4 base stage is connected with the control terminal of main control chip.
3. the intelligent metering instrument according to claim 2 with NB-IoT communication modules, it is characterised in that in triode
Resistance R4 is provided between Q1 base stage and triode Q4 colelctor electrode.
4. the intelligent metering instrument according to claim 2 with NB-IoT communication modules, it is characterised in that in triode
Resistance R6 is provided between Q4 base stage and the control terminal of main control chip.
5. the intelligent metering instrument according to claim 2 with NB-IoT communication modules, it is characterised in that the partial pressure
Device is the resistance R1 and R2 of series connection.
6. the intelligent metering instrument according to claim 5 with NB-IoT communication modules, it is characterised in that the filtering
Device is the electric capacity C1 for being connected in parallel on resistance R2 both ends.
7. the intelligent metering instrument with NB-IoT communication modules according to any one of claim 1 to 6, its feature exist
In the lithium battery includes lithium battery monomer, and the electric capacity in parallel with lithium battery monomer.
8. the intelligent metering instrument with NB-IoT communication modules according to any one of claim 1 to 6, its feature exist
In the voltage collection circuit is used for the voltage that lithium battery is gathered by input, and the voltage collected is transmitted through output end
To main control chip, and the dump energy Cr of lithium battery is obtained, dump energy threshold value L1, L2, L3 is preset with main control chip,
A) Cr >=L1, is lithium battery normal condition, without any processing under this state；
B) L2 ＜ Cr≤L1, it is the state of low electric quantity of lithium battery, triggers not enough power supply alarm；
C) L3 ＜ Cr≤L2, are electric quantity of lithium battery lock-out state, and electricity indicates flash for prompting；
D) Cr ＜ L3, it is lithium battery power-down state, prompts to change lithium battery.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108334643A (en) * | 2018-03-24 | 2018-07-27 | 嘉兴市信达电子科技有限公司 | A kind of enterprise energy management system based on narrowband Internet of Things |
| CN109341800A (en) * | 2018-11-22 | 2019-02-15 | 安徽翼迈科技股份有限公司 | A kind of NB-IOT intelligent water meter system |
| CN109708713A (en) * | 2018-12-19 | 2019-05-03 | 重庆前卫克罗姆表业有限责任公司 | A kind of flowmeter system based on NB-IoT |
| CN112312527A (en) * | 2020-08-07 | 2021-02-02 | 神州融安科技（北京）有限公司 | Method and device for reducing power consumption of U shield |
-
2017
- 2017-06-16 CN CN201720704091.6U patent/CN206876240U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108334643A (en) * | 2018-03-24 | 2018-07-27 | 嘉兴市信达电子科技有限公司 | A kind of enterprise energy management system based on narrowband Internet of Things |
| CN109341800A (en) * | 2018-11-22 | 2019-02-15 | 安徽翼迈科技股份有限公司 | A kind of NB-IOT intelligent water meter system |
| CN109708713A (en) * | 2018-12-19 | 2019-05-03 | 重庆前卫克罗姆表业有限责任公司 | A kind of flowmeter system based on NB-IoT |
| CN112312527A (en) * | 2020-08-07 | 2021-02-02 | 神州融安科技（北京）有限公司 | Method and device for reducing power consumption of U shield |
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