CN109708713A - A kind of flowmeter system based on NB-IoT - Google Patents
A kind of flowmeter system based on NB-IoT Download PDFInfo
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- CN109708713A CN109708713A CN201811557179.5A CN201811557179A CN109708713A CN 109708713 A CN109708713 A CN 109708713A CN 201811557179 A CN201811557179 A CN 201811557179A CN 109708713 A CN109708713 A CN 109708713A
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- 238000000465 moulding Methods 0.000 claims description 3
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Abstract
The gas meter, flow meter system of the application is for the gas meter, flow meter of other mechanicss of communication such as LoRa, Zeebig, and stability is more preferable, and price is also lower, is suitable for the market demand；By the control of the output power to NB-IoT communication module, the stability of data transmission ensure that；The power management module is also sampling module, clock module and the power supply of gas meter, flow meter main control module；It ensure that the stability of the power supply to intermodule.
Description
Technical field
The present invention relates to Internet of Things diaphragm gas meter technical fields, and in particular to a kind of flowmeter system based on NB-IoT
System.
Background technique
Internet of Things diaphragm gas meter is communicated using 2G at present, although can satisfy Internet of Things communication, its networking time
Long, power consumption is high.The performance of tradition machinery gas meter has gradually tended to be superseded, and intelligent gas meter is present main product,
Middle Internet of Things gas meter most prospect.Magnetic Sensor is exactly magnetic field, electric current, ess-strain, temperature, light etc. to be caused sensitive member
The variation of part magnetic property is converted into electric signal, detects the sensor of respective physical amount in this way.Magnetic Sensor is in industry
There are many field application, are also in the trend of rapid growth.
Magnetic Sensor is divided into three classes: compass, magnetic sensors, position sensor.Compass: ground club generates magnetic field,
If you can make compass by energy geodesic sphere Surface field.Current sensor: current sensor is also magnetic field sensor.Electric current
Sensor can be used in household electrical appliance, smart grid, electric vehicle, wind-power electricity generation etc..Position sensor: if magnet and
Magnetic Sensor has change in location between each other, and it is exactly linear transducer that this change in location, which is linear, if rotation is exactly
Rotation sensor.
There is power consumption height, builtin voltage power supply instability in existing gas meter, flow meter.
Summary of the invention
For the deficiency in the presence of the prior art, the present invention provides a kind of flowmeter system based on NB-IoT, solutions
Determined gas meter, flow meter power problems and in-line power stability based on NB-IoT the problem of.To achieve the above object, the present invention adopts
With the following technical solution: a kind of flowmeter system based on NB-IoT, including gas meter, flow meter main control module, gas meter, flow meter master control
Valve control module, sampling module, NB-IoT communication module, power management module and clock module are connected on molding block；NB-
IoT communication module is also connected with SIM interface circuit, and the power management module is NB-IoT communication module, sampling module, clock
Module and the power supply of gas meter, flow meter main control module；Sampling module includes Hall sensor and Magnetic Sensor, the gas meter, flow meter main control
Module is used to control the control power management module to the output power of NB-IoT communication module.
Further, the NB-IoT communication module is connected with carrier server, and carrier server is connected with information
Intelligent terminal.
Further, information intelligent terminal is mobile phone.
Further, gas meter, flow meter main control module uses chip U3, the model PIC16LF1947-I/PT of chip U3.
Further, power management module includes battery pack P1, transistor Q2 and transistor Q6；The forward direction of battery pack P1 is defeated
It is connected to the emitter of the transistor Q2 after outlet series diode D6, is in series between the emitter and base stage of transistor Q2
R5 is hindered, the emitter of transistor Q2 is grounded after also passing through the first ground capacity group of series connection, and the collector of transistor Q2 passes through second
It is grounded after ground capacity group, feeder ear of the collector of transistor Q2 as NB-IoT communication module；The base of the transistor Q2
Pole connects the collector of transistor Q6, and the emitter ground connection of transistor Q6 is in series with resistance between the base stage and ground of transistor Q6
R12, the base stage of transistor Q6 also pass through the control terminal that resistance R10 is connected to gas meter, flow meter main control module.
Further, power management module further includes voltage stabilizing chip U1 and voltage stabilizing chip U2, the input terminal of voltage stabilizing chip U1
It is connected to the emitter of the transistor Q2, the input terminal of the output end connection voltage stabilizing chip U2 of voltage stabilizing chip U1, voltage stabilizing chip
The output end of U2 is connected to the power input of clock module, and the output end of voltage stabilizing chip U1 is connected to the gas meter, flow meter main control
The power end of module and the power end of sampling module.
Further, institute's clock module includes clock chip U4, and clock chip U4 is connected with serial storage U6 and crystal oscillator X1；
The output terminal of clock of clock chip U4 is connected to the clock interface of gas meter, flow meter main control module；The power end of the clock chip U4
It is also connected with and battery P7 is connected with by diode D7, the anode of battery P7 is connected to the forward end of the battery P7, battery
The forward end of P7 also passes through the second sampling resistor and is connected to the gas meter, flow meter main control module.
Further, Magnetic Sensor model TMR1302, the power end of Magnetic Sensor are connected to the power management module
Output end.
Further, the valve control module includes two-stage symmetrical expression amplifying circuit driving circuit, and two-stage symmetrical expression is put
The signal end of big circuit drives circuit is connected to the gas meter, flow meter main control module, two-stage symmetrical expression amplifying circuit driving circuit
Output end is connected with valve.
Further, display device P4 is also connected on the gas meter, flow meter main control module.
Compared with the prior art, the invention has the following beneficial effects:
1. the gas meter, flow meter system of the application is for the gas meter, flow meter of other mechanicss of communication such as LoRa, Zeebig, stability is more preferable,
Price is also lower, is suitable for the market demand；By the control of the output power to NB-IoT communication module, it ensure that data pass
Defeated stability；The power management module is also sampling module, clock module and the power supply of gas meter, flow meter main control module；It ensure that
To the stability of the power supply of intermodule.
2.TMR1302 provides temperature-compensating power supply by builtin voltage voltage-stablizer, and allows wide operating voltage range.
TMR1302 becomes numerous low function with low-work voltage, the supply current of microampere order, high response frequency, wide operating temperature range
The ideal chose of consumption, performance application, guarantees the stability of the data of system acquisition.
3. power management module includes battery pack P1, transistor Q2 and transistor Q6；The positive output end string of battery pack P1
It is connected to the emitter of the transistor Q2 after union II pole pipe D6, resistance R5 is in series between the emitter and base stage of transistor Q2,
The emitter of transistor Q2 is grounded after also passing through the first ground capacity group of series connection, and the collector of transistor Q2 passes through the second ground connection electricity
It is grounded after appearance group, feeder ear of the collector of transistor Q2 as NB-IoT communication module；The base stage of the transistor Q2 connects
The collector of transistor Q6, the emitter ground connection of transistor Q6, is in series with resistance R12 between the base stage and ground of transistor Q6, brilliant
The base stage of body pipe Q6 also passes through the control terminal that resistance R10 is connected to gas meter, flow meter main control module.Gas meter, flow meter main control module passes through
To the voltage acquisition of battery P1 forward end, the accuracy of collection voltages signal, the first ground capacity group and the second ground connection ensure that
Capacitance group has played burning voltage and sampled signal.
Power management module further includes voltage stabilizing chip U1 and voltage stabilizing chip U2, to sampling module, clock module and gas meter, flow meter
The dispersion of main control module power supply module is powered, and ensure that the stability of output power.
Detailed description of the invention
Fig. 1 is structural block diagram of the invention；
Fig. 2 is network diagram；
Fig. 3 is power management module circuit；
Fig. 4 is NB-IoT communication module circuit diagram；
Fig. 5 is SIM interface circuit；
Fig. 6 is clock module circuit；
Fig. 7 is title formula amplifying circuit driving circuit.
Specific embodiment
Scheme is described further now in conjunction with attached drawing.
Implementation column 1
As shown in figs. 1-7: a kind of flowmeter system based on NB-IoT, including gas meter, flow meter main control module, gas meter, flow meter master
Valve control module, sampling module, NB-IoT communication module, power management module and clock module are connected in control module；
NB-IoT communication module is also connected with SIM interface circuit, the power management module be NB-IoT communication module, sampling module,
Clock module and the power supply of gas meter, flow meter main control module；Sampling module includes Hall sensor and Magnetic Sensor, the gas meter, flow meter master
Control module is used to control the control power management module to the output power of NB-IoT communication module.The NB-IoT communication
Module is connected with carrier server, and carrier server is connected with information intelligent terminal.Information intelligent terminal is mobile phone.SIM
The end VREG SIM, the end SIM RST and the end SIMCLK of interface circuit be sequentially connected to NB-IoT communication module the end USIM-VDD,
The end USIM-RST and the end USIM-CLK；The end data SIM DATA of SIM interface circuit is connected to NB-IoT communication module USIM-
The end DATA.
The advantages of being communicated using NB-IoT includes following 4 points.
(1) strong link
In the case where same base station, NB-IoT can provide 50-100 times of access number than existing wireless technology.One
Sector can support 100,000 connections, support the network of low latency sensitivity, ultralow equipment cost, low equipment power dissipation and optimization
Framework.For example, it is limited to bandwidth, operator only opens 8-16 access port to router each in family, and a family
Often there are plurality of mobile phones, notebook, tablet computer in front yard, it is following to need to join to the full room intelligence of realization, hundreds of sensing equipment
Net is just at an intractable problem.And NB-IoT is enough easily to meet large number of equipment networking requirement in following wisdom family.
(2) high covering
NB-IoT in-door covering ability is strong, promotes 20dB gain than LTE, is equivalent to and improves 100 times of overlay area abilities.
It not only can satisfy and extensively cover demand as rural area, it is for plant area, underground garage, well lid this kind of that depth covering is required
Using equally applicable.By taking well lid monitors as an example, the mode of past GPRS needs to stretch out an antenna, and vehicle dealing easily damages,
And as long as NB-IoT deployment is proper, so that it may this problem of very good solution.
(3) low-power consumption
Low power consumption characteristic is Internet of Things using an important indicator, especially for some equipment that cannot often replace battery
And occasion, all kinds of sensor monitoring equipment being such as placed in the remote districts of high mountain wilderness, they can not be as smart phone one day
One charging, the battery up to several years is most essential demand.NB-IoT focuses small data quantity, small rate application, because
This NB-IoT equipment power dissipation can be accomplished very small, and equipment can be substantially improved by several years cruise duration from past some months.
(4) inexpensive
Compared with LoRa, NB-IoT is not necessarily to networking again, and radio frequency and antenna are essentially all multiplexing.It is with China Mobile
Example, have inside 900MHZ one than wider frequency band, it is only necessary to clear out the frequency range for carrying out a part of 2G, so that it may directly progress LTE
It is disposed while with NB-IoT.It is inexpensive excellent that low rate, low-power consumption, low bandwidth equally give NB-IoT chip and modular belt
Gesture.
Gas meter main control module uses chip U3, the model PIC16LF1947-I/PT of chip U3.Power management module
Including battery pack P1, transistor Q2 and transistor Q6；It is connected to after the positive output end series diode D6 of battery pack P1 described
The emitter of transistor Q2, is in series with resistance R5 between the emitter and base stage of transistor Q2, the emitter of transistor Q2 also passes through
It is grounded after first ground capacity group of connecting, the collector of transistor Q2 is grounded after passing through the second ground capacity group, transistor Q2's
Feeder ear of the collector as NB-IoT communication module；The collector of the base stage connection transistor Q6 of the transistor Q2, crystal
The emitter of pipe Q6 is grounded, and resistance R12 is in series between the base stage and ground of transistor Q6, the base stage of transistor Q6 also passes through resistance
R10 is connected to the control terminal of gas meter, flow meter main control module.First ground capacity group includes capacitor C37 and capacitor C6 in parallel；The
Two ground capacity groups include shunt capacitance C38 and capacitor C3.This design controls transistor Q6's by gas meter main control module
The size of the conducting electric current of base stage, to control the conducting power of transistor Q2.
Power management module further includes voltage stabilizing chip U1 and voltage stabilizing chip U2, and the input terminal of voltage stabilizing chip U1 is connected to described
The emitter of transistor Q2, the input terminal of the output end connection voltage stabilizing chip U2 of voltage stabilizing chip U1, the output end of voltage stabilizing chip U2
It is connected to the power input of clock module, the output end of voltage stabilizing chip U1 is connected to the power supply of the gas meter, flow meter main control module
The power end at end and sampling module.
Institute's clock module includes clock chip U4, and clock chip U4 is connected with serial storage U6 and crystal oscillator X1；Clock chip
The output terminal of clock of U4 is connected to the clock interface of gas meter, flow meter main control module；The power end of the clock chip U4 is also connected with logical
It crosses diode D7 and is connected with battery P7, the anode of battery P7 is connected to the forward end of the battery P7, the forward direction of battery P7
End is also connected to the gas meter, flow meter main control module by the second sampling resistor.Sampling resistor and the second sampling resistor include two
Concatenated first resistor and second resistance, collection voltages signal between first resistor and second resistance, first resistor connection sampling
Point, second resistance ground connection.The prevention of first resistor and second resistance is determined according to specific setting voltage.
Hall sensor or Magnetic Sensor model TMR1302, the power end of Magnetic Sensor are connected to the power supply pipe
Manage the output end of module.
The valve control module includes two-stage symmetrical expression amplifying circuit driving circuit, the driving of two-stage symmetrical expression amplifying circuit
The signal end of circuit is connected to the gas meter, flow meter main control module, the output end connection of two-stage symmetrical expression amplifying circuit driving circuit
There is valve.Display device P4 is also connected on the gas meter, flow meter main control module.The new model of display device P4 is JRD50053.
Embodiment 2
On the basis of embodiment, two-stage symmetrical expression amplifying circuit driving circuit as shown in Figure 7 includes transistor Q7, crystal
Pipe Q4, transistor Q8, transistor Q3, transistor Q5 and transistor Q3, transistor Q7 and transistor Q5 are respectively formed the first order and put
Greatly, transistor Q4 and transistor Q8 and transistor Q3 and transistor Q3 respectively corresponds to form second level amplification.J1 is two-stage pair
The output end of title formula amplifying circuit driving circuit, J1 output end both ends also feedback voltage are exported to the gas meter, flow meter master control molding
Block guarantees the reliability of output end feedback model.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (10)
1. a kind of flowmeter system based on NB-IoT, which is characterized in that including gas meter, flow meter main control module, gas meter, flow meter main control
Valve control module, sampling module, NB-IoT communication module, power management module and clock module are connected in module；NB-
IoT communication module is also connected with SIM interface circuit, and the power management module is NB-IoT communication module, sampling module, clock
Module and the power supply of gas meter, flow meter main control module；Sampling module includes Hall sensor and Magnetic Sensor, the gas meter, flow meter main control
Module is used to control the control power management module to the output power of NB-IoT communication module.
2. a kind of flowmeter system based on NB-IoT as described in claim 1, which is characterized in that the NB-IoT communicates mould
Block is connected with carrier server, and carrier server is connected with information intelligent terminal.
3. a kind of flowmeter system based on NB-IoT as claimed in claim 2, which is characterized in that information intelligent terminal is hand
Machine.
4. a kind of flowmeter system based on NB-IoT as described in claim 1, which is characterized in that gas meter, flow meter main control module
Using chip U3, the model PIC16LF1947-I/PT of chip U3.
5. a kind of flowmeter system based on NB-IoT as described in claim 1, which is characterized in that power management module includes
Battery pack P1, transistor Q2 and transistor Q6；The crystal is connected to after the positive output end series diode D6 of battery pack P1
The emitter of pipe Q2, is in series with resistance R5 between the emitter and base stage of transistor Q2, the emitter of transistor Q2 also passes through series connection
It is grounded after first ground capacity group, the collector of transistor Q2 after the second ground capacity group by being grounded, the current collection of transistor Q2
Feeder ear of the pole as NB-IoT communication module；The collector of the base stage connection transistor Q6 of the transistor Q2, transistor Q6
Emitter ground connection, resistance R12 is in series between the base stage and ground of transistor Q6, the base stage of transistor Q6 also passes through resistance R10
It is connected to the control terminal of gas meter, flow meter main control module.
6. a kind of flowmeter system based on NB-IoT as claimed in claim 5, which is characterized in that power management module also wraps
Voltage stabilizing chip U1 and voltage stabilizing chip U2 are included, the input terminal of voltage stabilizing chip U1 is connected to the emitter of the transistor Q2, pressure stabilizing core
The input terminal of the output end connection voltage stabilizing chip U2 of piece U1, the output end of voltage stabilizing chip U2 are connected to the power input of clock module
End, the output end of voltage stabilizing chip U1 are connected to the power end of the gas meter, flow meter main control module and the power end of sampling module.
7. a kind of flowmeter system based on NB-IoT as described in claim 1, which is characterized in that when institute's clock module includes
Clock chip U4, clock chip U4 are connected with serial storage U6 and crystal oscillator X1；The output terminal of clock of clock chip U4 is connected to combustion gas
The clock interface of table main control module；The power end of the clock chip U4, which is also connected with, is connected with battery P7 by diode D7,
The anode of battery P7 is connected to the forward end of the battery P7, and the forward end of battery P7 also passes through the connection of the second sampling resistor
In the gas meter, flow meter main control module.
8. a kind of flowmeter system based on NB-IoT as described in claim 1, which is characterized in that Magnetic Sensor model
TMR1302, the power end of Magnetic Sensor are connected to the output end of the power management module.
9. a kind of flowmeter system based on NB-IoT as described in claim 1, which is characterized in that the valve control module
Including two-stage symmetrical expression amplifying circuit driving circuit, the signal end of two-stage symmetrical expression amplifying circuit driving circuit is connected to the combustion
The output end of gas meter main control module, two-stage symmetrical expression amplifying circuit driving circuit is connected with valve.
10. a kind of flowmeter system based on NB-IoT as described in claim 1, which is characterized in that the gas meter, flow meter master control
Display device P4 is also connected on molding block.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811557179.5A CN109708713A (en) | 2018-12-19 | 2018-12-19 | A kind of flowmeter system based on NB-IoT |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811557179.5A CN109708713A (en) | 2018-12-19 | 2018-12-19 | A kind of flowmeter system based on NB-IoT |
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| CN201811557179.5A Pending CN109708713A (en) | 2018-12-19 | 2018-12-19 | A kind of flowmeter system based on NB-IoT |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049054A (en) * | 2021-03-12 | 2021-06-29 | 上海晟颢信息科技有限公司 | Based on 4G whole net leads to gas instrument data teletransmission device |
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Address after: No. 69, Mount Huangshan Avenue, Yubei District, Chongqing, Chongqing Applicant after: Chongqing Qianwei watch Co., Ltd Address before: No. 69, Mount Huangshan Avenue, Yubei District, Chongqing, Chongqing Applicant before: QIANWEI KROMSCHRODER METERS (CHONGQING) Co.,Ltd. |
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| CB02 | Change of applicant information |