CN208094709U - A kind of remote fuel gas centralized meter-reading system based on camera acquisition - Google Patents
A kind of remote fuel gas centralized meter-reading system based on camera acquisition Download PDFInfo
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- CN208094709U CN208094709U CN201820569172.4U CN201820569172U CN208094709U CN 208094709 U CN208094709 U CN 208094709U CN 201820569172 U CN201820569172 U CN 201820569172U CN 208094709 U CN208094709 U CN 208094709U
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Abstract
The utility model discloses a kind of remote fuel gas centralized meter-reading systems based on camera acquisition, including background server, which is characterized in that the meter reading client terminal being additionally provided near gas meter, flow meter；The meter reading client terminal includes the MCU control unit and camera being connect respectively with MCU control unit, wireless communication module and power module, pass through image information of the camera acquisition combustion including combustion gas meter reading, and module is uploaded to background server, recognition combustion gas reading by radio communication by described image information.The utility model long-distance meter-reading system acquires combustion gas reading information by camera, complicated improvement need not be done to original gas meter, flow meter, while passing through the optimization to circuit structure, keep the remote fuel gas centralized meter-reading system acquired based on camera low in energy consumption, electricity is saved, circuit safety is reliable, and service life is long.
Description
Technical field
The utility model belongs to internet of things field, and in particular to it is a kind of based on camera acquisition remote fuel gas collection copy
System.
Background technology
Currently, domestic gas meter still by the way of manual metering, not only consumes a large amount of manpower and materials, and acquire
Data error is big, and the copy reading period is long, and statistical result feedback is also not prompt enough, seriously limits the efficiency of supply and matter of supply system
The promotion of amount.It introduces after Internet of Things netlist, it is to fire that the technology mode of each family, which also has quality, popular technical implementation way,
Gas meter metering section introduces photoelectricity recognition technical intelligence metering gas dosage and carries out billing statistics, but these equipment are not only right
Gas meter, flow meter is transformed, and energy consumption and security performance also have to be improved.
Invention content
The technical purpose of the utility model, which is to provide a kind of remote fuel gas collection of low-power consumption acquired based on camera, copies and is
System, scheme are：
A kind of remote fuel gas centralized meter-reading system based on camera acquisition, including background server, which is characterized in that be additionally provided with
Meter reading client terminal near gas meter, flow meter；
The meter reading client terminal includes MCU control unit and the camera being connect respectively with MCU control unit, channel radio
Believe module and power module, by image information of the camera acquisition combustion including combustion gas meter reading, and described image is believed
Module is uploaded to background server, recognition combustion gas reading to breath by radio communication；
More than the both ends that power consumption component and the MCU control unit of power consumption preset value are attempted by power module, and more than
A transistor is concatenated on the power consumption component circuit of power consumption preset value, the break-make of the transistor is controlled by MCU control unit, from
And control the keying of corresponding power consumption component, it is described be more than the power consumption component of power consumption preset value include webcam driver electricity
Road, flash lamp and wireless communication module；
The power module uses lithium battery to power for the power consumption component of the meter reading client terminal, and equipped with protection electricity
Road, the protection circuit is by fuse F2, control chip, two MOSFET（U8, U9）It is constituted with several Resistor-Capacitor Units：
The fuse F2 is serially connected between lithium battery electric core J11 cathode and battery output anode P+；Current-limiting resistance R84
After connecting with filter capacitor C34, it is attempted by the both ends of lithium battery J11 and fuse F2；MOSFET U8 and MOSFET U9 are successively
It is serially connected between lithium battery electric core J11 cathode and battery output cathode P-；The Vss pins of the control chip are connected to lithium electricity
Between pond battery core J11 cathode and MOSFET U8；The Vdd pins of control chip are connected to current-limiting resistance R84 and filter capacitor C34
Between；The Ct pins of control chip are connected to by capacitance C35 between lithium battery electric core J11 cathode and MOSFET U8, and C35 is
Delay capacitor；The Dout pins of control chip are connect with the grid of MOSFET U8, and the logical of discharge loop is controlled by MOSFET U8
It is disconnected；The Cout pins of control chip are connect with the grid of MOSFET U9, and the break-make of charge circuit is controlled by MOSFET U9；Control
The V- pins of chip by the branch of a concatenation filter capacitor C36 be connected to lithium battery electric core J11 cathode and MOSFET U8 it
Between, it is connected between MOSFET U9 and battery output cathode P- by the branch of a concatenation thermistor R85；The control
Coremaking piece is responsible for monitoring cell voltage and loop current, and controls the grid of two MOSFET.
On the basis of said program, it is further improved or preferred scheme further includes：
The resistance R1 of 1K is equipped between the MCU control unit signal output end and the transistor signal input terminal.
The current-limiting resistance R84 is 100R resistance, and resistance R85 is 4K7 thermistors.
The wireless communication module is equipped with communication chip, antenna and antenna terminal, communication chip pin and antenna terminal it
Between reserve a π type match circuit, the π types match circuit is made of capacitance C17, capacitance C18 and a Resistor-Capacitor Unit L2, institute
Resistor-Capacitor Unit L2 is stated as 220pF capacitances, 1nH inductance or 0 Europe resistance, one end of the capacitance C17 and capacitance C18 are separately connected
In the both sides of Resistor-Capacitor Unit L2, the other end of capacitance C17 and capacitance C18 are grounded.
The antenna preferably uses spring antenna.
Advantageous effect:
The utility model long-distance meter-reading system acquires combustion gas reading information by camera, need not be done to original gas meter, flow meter
Complicated improvement, while by the optimization to circuit structure, keeping the remote fuel gas centralized meter-reading system acquired based on camera low in energy consumption,
Electricity is saved, circuit safety is reliable, and service life is long.
Description of the drawings
Fig. 1 is the structural schematic diagram of meter reading client terminal power control circuit；
Fig. 2 is the structural schematic diagram of meter reading client terminal wireless communication module circuit；
Fig. 3 power modules protect the structural schematic diagram of circuit.
Specific implementation mode
In order to further elucidate the technical solution of the utility model and operation principle, below in conjunction with the accompanying drawings with specific embodiment
Specific description is done to the utility model.
A kind of remote fuel gas centralized meter-reading system based on camera acquisition of the present embodiment is divided into three-level, and the first order is background service
Device, completes data analysis and data processing various functions are realized；The second level is trunking, completes the forwarding of data；The third level
For meter reading client terminal, the acquisition of data is realized.After the data that camera acquires are encrypted in meter reading client terminal, from
Dynamic connection trunking, transmits data to trunking, while providing real time picture data to the user and looking by wireless transmission
It askes and verification, trunking is responsible for the data that multiple meter reading client terminals of lower extension transmit to be sent to backstage in real time by GPRS
Server carries out data processing, it can be achieved that the various additional value-added functionalities such as inquiry payment after background server completion data processing.
The meter reading client terminal includes shell, camera and the circuit board in shell, and meter reading client terminal is logical
Shell is crossed to be fixed on the pipeline close to gas meter, flow meter or on wall, the circuit board be equipped with MCU control unit and respectively with MCU
Wireless communication module, the power module of control unit connection, meter reading client terminal include that gas meter, flow meter is read by camera acquisition combustion
Image information including number, and module transfer passes through trunking in trunking by radio communication by described image information
It is uploaded to background server, background server is read by the combustion gas of the recognition image information collecting gas meter, flow meter.
The power module uses lithium battery to power for the power consumption component of meter reading client terminal, therefore to power supply low-power consumption
Design requirement is stringent, and MCU power supplies and external larger power digital circuit are designed using isolated from power, as shown in Figure 1, pre- more than power consumption
If the power consumption component of value（The larger peripheral circuit of power consumption）The both ends of power module are attempted by with MCU control unit, and super
It crosses on the power consumption component circuit of power consumption preset value and concatenates the P1.0 feet series connection 1K resistance R1 of transistor Q8, MCU a control power supply
Afterwards, it is connect with transistor Q8, the break-make of controlling transistor Q8, to control the keying of corresponding power consumption component,
Described be more than the power consumption component of power consumption preset value includes webcam driver circuit, flash lamp and radio communication mold
Block etc., MCU control unit routine work are in standby, and for power consumption control within 10ua, the power supply of circuit board is unified by MCU
Scheduling is to reach low power consumption control.
The power module is equipped with protection circuit, and the protection circuit is by fuse F2, a control chip（IC）U7, two
A MOSFET（U8, U9）It is constituted with several Resistor-Capacitor Units, as shown in Figure 3.
The control chip U7 uses R5421 Li battery protection ICs, the fuse F2 to be serially connected in lithium battery electric core J11
Between cathode and battery output anode P+；After the current-limiting resistance R84 of 100R connects with filter capacitor C34, it is attempted by lithium battery
The both ends of J11 and fuse F2 prevent J11 plug immediate current pulses big, cause to impact to chip power input terminal, C34 is used
In the higher hamonic wave for filtering out input power carrying；MOSFET U8 and MOSFET U9 are sequentially connected in series in lithium battery electric core J11 cathode
Between battery output cathode P-；The Vss of the control chip（Ground connection）Pin be connected to lithium battery electric core J11 cathode with
Between MOSFET U8；Control the Vdd of chip（Positive level inputs）Pin be connected to current-limiting resistance R84 and filter capacitor C34 it
Between；The Ct pins of control chip are connected to by capacitance C35 between lithium battery electric core J11 cathode and MOSFET U8, and C35 is to prolong
When capacitance；The Dout pins of control chip are connect with the grid of MOSFET U8, and the break-make of discharge loop is controlled by MOSFET U8；
The Cout pins of control chip are connect with the grid of MOSFET U9, and the break-make of charge circuit is controlled by MOSFET U9；Control core
The V- of piece（Charger negative input level）Pin is connected to lithium battery electric core J11 by the branch of a concatenation filter capacitor C36
Between cathode and MOSFET U8, MOSFET U9 are connected to by the branch of a concatenation 4K7 thermistors R85 and are exported with battery
Between holding cathode P-, C36 is used to filter out the clutter in out-put supply, and thermistor R85 can be because of hair when charging current is excessive
Heat and increase resistance so that output current reduce, can avoid overcharging the damage to battery；The control chip is responsible for monitoring battery
Voltage and loop current, and control the grid of two MOSFET.
The protection circuit has additives for overcharge protection, over, overcurrent protection and short-circuit protection function, work
Principle analysis is as follows：
1）Normal condition：
" Cout " and " Dout " foot all output HIGH voltages of chip U7 in normal state, two MOSFET are all in leading
Logical state, battery can be charged and discharged freely, due to the conduction impedance very little of MOSFET, usually less than 30 millis
Europe, therefore its conducting resistance influences very little to the performance of circuit.The consumption electric current of protection circuit is A grades of μ under this state, usually
Less than 7 μ A.In to external loading discharge process, voltage can continuously decrease lithium battery with discharge process, work as cell voltage
When being down to 2.5V, capacity is given out light completely, at this time if battery is allowed to continue that, to load discharge, the permanent of battery will be caused
Damage.
2）Over：
In battery discharge procedure, when control IC detects that cell voltage is less than 2.3V（The value is determined by controlling IC, different
IC have different values）When, " Dout " foot will be changed into no-voltage by high voltage, and U8 is made to switch to turn off by being connected, to
Discharge loop has been cut off, so that battery is not discharged again load, plays the role of over.And at this time since U8 is included
The presence of body diode D28, charger can be charged the battery by the diode.Due in over state
Lower cell voltage cannot reduce again, therefore it is required that the consumption electric current of protection circuit is minimum, low-power consumption shape can be entered by controlling IC at this time
State, it is entire to protect circuit power consumption that be less than 0.1 μ A.Control IC detect cell voltage less than 2.3V to send out shutdown U8 signals
Between, also there is one section of delay time, the length of the delay time is determined by inductance C35, is typically set to 100 milliseconds or so, with
It avoids causing erroneous judgement because of interference.
3）Short-circuit protection：
Battery is during to load discharge, if loop current is big to making U7 (5Pin)>0.9V（The value is determined by controlling IC
Fixed, different IC has different values）When, control IC is then judged as load short circuits, and " Dout " foot will be changed by high voltage rapidly
For no-voltage, U8 is made to switch to turn off by being connected, to cut off discharge loop, plays the role of short-circuit protection.The delay of short-circuit protection
Time is extremely short, usually less than 7 microseconds.Its operation principle is similar with overcurrent protection, and only judgment method is different, protection delay
Time is also different.
The wireless communication module is equipped with communication chip, antenna and antenna terminal, communication chip pin and antenna terminal it
Between reserve a π type match circuit, the π types match circuit is made of 1nH inductance L2, capacitance C17 and capacitance C18, the electricity
The one end for holding C17 and capacitance C18 is connected to the both sides of inductance L2, and the other end of capacitance C17 and capacitance C18 are grounded.It
The impedance of line is influenced by factors such as the floor file of circuit board, shell and setting angles, reserve this π type match circuit be for
When 50 ohm of antenna substantial deviation, correct it to 50 ohm.Under default situations, antenna impedance is relatively 50 ohm
, C17 and C18 in fig. 2 do not have to welding, and L2 with 220pF capacitances either 1nH inductance again or 0 Europe resistance, San Zhejun
It can.When encountering special situation, for example, inside antenna installation mold, the volume very little of antenna or need reinforce limitation of high harmonics
It just needs to carry out Matching and modification Deng, these three matching elements.
In air, the electromagnetic wavelength that frequency is 470MHz is 63CM, if designing the half-wave dipole day of a standard
Line, then this antenna be at least half wavelength, i.e. 31.5CM.In practical application, there is no set most products to antenna
The reserved so big space of meter, so generally using spring antenna.When using this spring antenna, antenna is connected on different planks
On, performance parameter is different.This is because such antenna, spring is a part for entire antenna, another
Part is ground on circuit board, therefore in the present embodiment, when designing the circuit floor file of meter reading client terminal, needs to follow
Principle：First, to the greatest extent install can antennas orthogonal circuit board, second is that make the copper billet of floor file big as possible and continuous, and rely on
Intensive via is continuous to make the floor file of tow sides.
Basic principles, main features, and advantages of the present invention has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the present utility model is not limited to the above embodiments, described in above embodiments and description
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, the utility model requires protection scope is by appended claims, specification and its equivalent
It defines.
Claims (5)
1. a kind of remote fuel gas centralized meter-reading system based on camera acquisition, including background server, which is characterized in that be additionally provided with peace
Meter reading client terminal near gas meter, flow meter；
The meter reading client terminal includes equipped with MCU control unit and the camera, the channel radio that are connect respectively with MCU control unit
Believe module and power module, the image information including combustion gas meter reading is acquired by camera, and by described image information
Module is uploaded to background server, recognition combustion gas reading by radio communication；
More than the both ends that the power consumption component and MCU control unit of power consumption preset value are attempted by power module, and more than power consumption
A transistor is concatenated on the power consumption component circuit of preset value, the break-make of the transistor is controlled by MCU control unit, to control
The keying of corresponding power consumption component is made, described is more than that the power consumption component of power consumption preset value includes webcam driver circuit, dodges
Light lamp and wireless communication module；
The power module uses lithium battery to power for the power consumption component of the meter reading client terminal, and is equipped with protection circuit,
The protection circuit is by fuse F2, control chip, two MOSFET（U8, U9）It is constituted with several Resistor-Capacitor Units：
The fuse F2 is serially connected between lithium battery electric core J11 cathode and battery output anode P+；Current-limiting resistance R84 and filter
After the C34 series connection of wave capacitance, it is attempted by the both ends of lithium battery J11 and fuse F2；MOSFET U8 and MOSFET U9 are sequentially connected in series
Between lithium battery electric core J11 cathode and battery output cathode P-；The Vss pins of the control chip are connected to lithium battery
Between core J11 cathode and MOSFET U8；The Vdd pins of control chip are connected between current-limiting resistance R84 and filter capacitor C34；
The Ct pins of control chip are connected to by capacitance C35 between lithium battery electric core J11 cathode and MOSFET U8, and C35 is delay electricity
Hold；The Dout pins of control chip are connect with the grid of MOSFET U8, and the break-make of discharge loop is controlled by MOSFET U8；Control
The Cout pins of chip are connect with the grid of MOSFET U9, and the break-make of charge circuit is controlled by MOSFET U9；Control chip
V- pins are connected to by the branch of a concatenation filter capacitor C36 between lithium battery electric core J11 cathode and MOSFET U8, are led to
The branch for crossing a concatenation thermistor R85 is connected between MOSFET U9 and battery output cathode P-；The control chip
It is responsible for monitoring cell voltage and loop current, and controls the grid of two MOSFET.
2. a kind of remote fuel gas centralized meter-reading system based on camera acquisition according to claim 1, which is characterized in that MCU
The resistance R1 of 1K is equipped between control unit signal output end and the transistor signal input terminal.
3. a kind of remote fuel gas centralized meter-reading system based on camera acquisition according to claim 1, which is characterized in that described
Current-limiting resistance R84 is 100R resistance, and resistance R85 is 4K7 thermistors.
4. a kind of remote fuel gas centralized meter-reading system based on camera acquisition according to claim 1,2 or 3, feature exist
In the wireless communication module is equipped with communication chip, antenna and antenna terminal, is reserved between communication chip pin and antenna terminal
One π type match circuit, the π types match circuit are made of capacitance C17, capacitance C18 and a Resistor-Capacitor Unit L2, the capacitance-resistance
Element L2 is 220pF capacitances, 1nH inductance or 0 Europe resistance, and one end of the capacitance C17 and capacitance C18 are connected to capacitance-resistance
The other end of the both sides of element L2, capacitance C17 and capacitance C18 are grounded.
5. a kind of remote fuel gas centralized meter-reading system based on camera acquisition according to claim 4, which is characterized in that described
Antenna uses spring antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820569172.4U CN208094709U (en) | 2018-04-20 | 2018-04-20 | A kind of remote fuel gas centralized meter-reading system based on camera acquisition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820569172.4U CN208094709U (en) | 2018-04-20 | 2018-04-20 | A kind of remote fuel gas centralized meter-reading system based on camera acquisition |
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| CN208094709U true CN208094709U (en) | 2018-11-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109451275A (en) * | 2018-11-16 | 2019-03-08 | 昆山南红物联网科技有限公司 | A kind of gas meter, flow meter ammeter water meter camera shooting remote radio meter register method |
-
2018
- 2018-04-20 CN CN201820569172.4U patent/CN208094709U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109451275A (en) * | 2018-11-16 | 2019-03-08 | 昆山南红物联网科技有限公司 | A kind of gas meter, flow meter ammeter water meter camera shooting remote radio meter register method |
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