CN209043952U - A kind of bluetooth ammeter - Google Patents

Abstract

The utility model provides a kind of bluetooth ammeter, including ammeter shell and is equipped with the intracorporal one-chip computer U1 of electric meter case, and the one-chip computer U1 is connect with feeder ear and user load respectively；The serial communication port of the one-chip computer U1 is connected with bluetooth communication U5；The bluetooth communication U5 is connect with the terminal device with bluetooth module；The power purchase system that the terminal device is equipped with Third-party payment platform and connect with national grid server, user pays expense to power purchase system by Third-party payment platform and is converted into electricity after power purchase system receives payment expense, it is sent to terminal device, realizes power purchase；The electricity that power purchase system obtains is sent to one-chip computer U1 by bluetooth module by terminal device, realizes the change of electricity data in ammeter；It further include the electricity consumption acquisition module being connect with one-chip computer U1, the singlechip microcomputer U1 is stored in data storage U3 after handling the user power consumption of acquisition.

Description

A kind of bluetooth ammeter

Technical field

The utility model relates to ammeter power purchase system regions more particularly to a kind of utilization bluetooth and terminal device to realize intelligence The bluetooth ammeter of power purchase.

Background technique

In today that science and technology is grown rapidly, electric energy meter enters at a quick pace huge numbers of families, the present most common Novel electric Energy table is electric card prepayment meter.However existing electric card prepayment meter, it is required to user and carries electric card in site purchase After electricity, after being then inserted into ammeter by electric card, power purchase process is realized in ammeter identification.This process needs user to go to desired site, And there are certain work hours in site, once miss the work hours, just can not timely power purchase, cause user have a power failure puzzlement.

Summary of the invention

The purpose of this utility model is that realizing without site power purchase, directly passing through by intelligent terminal and bluetooth module Terminal device realizes the function of power purchase at any time.

Realize that the technical solution of the utility model aim is as follows:

A kind of bluetooth ammeter, including ammeter shell and be equipped with the intracorporal one-chip computer U1 of electric meter case, the monolithic meter Calculation machine U1 is connect with feeder ear and user load respectively；The serial communication port of the one-chip computer U1 is connected with Bluetooth communication Module U5；The bluetooth communication U5 is connect with the terminal device with bluetooth module；

The power purchase system that the terminal device is equipped with Third-party payment platform and connect with national grid server, user Expense is paid to power purchase system by Third-party payment platform and is converted into electricity after power purchase system receives payment expense, is sent to Terminal device realizes power purchase；The electricity that power purchase system obtains is sent to one-chip computer U1 by bluetooth module by terminal device, Realize the change of electricity data in ammeter；

It further include the active metering module being connect with one-chip computer U1, the active metering module is negative for acquiring user The remaining capacity and power consumption of load, meanwhile, the data of acquisition are passed through one-chip computer U1, storing data by active metering module In memory U3.

It further, further include power-down protection circuit, the power-down protection circuit is connect with one-chip computer U1, for using The current supply circuit of family load issues signal before falling, so that data are stored in data storage U3 by one-chip computer U1 in time It is interior.It by power-down protection circuit, realizes before power failure, the timely storage to ammeter data avoids data in ammeter The problem of loss.

Further, the power-down protection circuit include in parallel diode D1, diode D2 and with diode D1, two Pole pipe D2 concatenated triode P3, the triode P3 are connect with the one-chip computer U1, the diode D1, diode D2 It is connected with external power supply.By transformer coupled detection voltage, there is no-voltage for detecting input AC 220V power supply.

Further, the external power supply includes transformer T1 in table, diode D5, diode D6, diode D7, two poles Pipe D8 and three terminal regulator W1 composition；The diode D5, diode D6, diode D7 and diode D8 form full-wave rectification Circuit, the AC low-tension coil one end transformer T1 connect diode D6 anode and diode D7 cathode, and the other end connects diode D5 anode and diode D8 cathode；The diode D5 cathode and diode D6 cathode export DC power anode, and through electricity Hold E1 to filter to form relay driving power supply VCC, the first end of the three terminal regulator W1 connects VCC, the three terminal regulator The second end of W1 is grounded, the third end of the three terminal regulator W1 be used to connect the one-chip computer U1 power vd D to power, The diode D7 anode and diode D8 anode are grounded.Wherein, direct current is electrically accessed the first end of three terminal regulator W1, surely Depressor W1 three-polar output direct current 5V voltage, shows for single-chip microcontroller, bluetooth module, LCD and provides operating voltage.

Further, the input terminal of the power vd D has sealed in magnetic bead, and the power vd D is also parallel with temperature-sensitive electricity Resistance.By increasing magnetic bead and temperature-sensitive power supply, it is therefore intended that improve the anti-interference ability of power supply, improve the essence of one-chip computer U1 Degree.

It further, further include set on the magnetic latching relay J between one-chip computer U1 and user load, the relay Device driving power VCC is used to power to magnetic latching relay J.It, can be according to one-chip computer by increasing magnetic latching relay J The different pulse electrical signals that U1 is issued, realize the turn on automatically and cutting action of circuit.

Further, the pin of the one-chip computer U1 is connected separately with trigger JK26 and trigger JK27, The trigger JK26 is connect by triode N1, P2 with the normally opened contact of the magnetic latching relay J, the trigger JK27 It is connect by triode N2, P1 with the normally-closed contact of the magnetic latching relay J.It is kept respectively with magnetic by different triodes The different contacts of relay J connect, and realize different pulse electrical signals, the effect that different triggers issue.

Further, the active metering module is electric energy computation chip U2, and the electric energy computation chip U2 is equipped with active Metering sampling input terminal, the active metering sampling input terminal are connect with the current supply circuit that user load is powered；The electric energy meter By F1 pin, F2 pin, then the sample of active metering sampling input terminal acquisition is calculated as after effective power by amount chip U2 It is connect after photoelectrical coupler and relay JP3 with the one-chip computer U1.

Further, the V2N pin of the electric energy computation chip U2 is connected with checking precision and adjusts circuit, the verification essence It includes being arranged in series eight resistance that degree, which adjusts circuit, and eight resistance are respectively resistance R35, resistance R34, resistance R33, resistance R32, resistance R31, resistance R30, resistance R29 and resistance R28 are correspondingly provided with switch on each resistance.Pass through increase Checking precision adjusts circuit, can directly adjust the ammeter measuring accuracy of output.Specifically, ammeter is accessed into Ammeter Test first Device, inputs normal voltage (220V) normalized current (10A), and every degree electric standard umber of pulse (1600imp/kwh) is then selective The switch of closure R28-R35 adjusted until ammeter measuring accuracy reaches within 1% with realizing.

Further, in eight resistance, from resistance R35 to resistance R28, the resistance value is gradually become smaller.

Compared with prior art, the utility model has the beneficial effects that

Intelligent terminal and intelligent electric meter are attached, by bluetooth module in combination with intelligence by the utility model Payment platform and power purchase system in energy terminal device, the direct power purchase of plug-in card can be not necessarily to by intelligent terminal by realizing Effect.

In the utility model, known chip in the prior art is made full use of, new combination connection has been carried out, has made it It can be applied in intelligent terminal and bluetooth ammeter, without wireless or cable network, using this mature technology of bluetooth, pole The earth facilitates user.

Data acquisition is carried out by using electricity consumption situation of the active data acquisition modes to user, it can be more accurately right The electricity consumption situation of user carries out analytical calculation, while by adding bluetooth communication on the single-chip microcontroller in ammeter, in bluetooth Establish a communications link between communication module and single-chip microcontroller, make data on single-chip microcontroller can for transmission to bluetooth communication, thus Data communication is carried out using bluetooth module in Bluetooth of mobile phone and ammeter, is transferred data on the mobile phone of user.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of bluetooth ammeter provided by the utility model；

Fig. 2 is the circuit diagram of bluetooth communication U5 provided by the utility model；

Fig. 3 is the circuit diagram of bluetooth ammeter provided in this embodiment；

Fig. 4 is a kind of circuit diagram of bluetooth ammeter provided by the utility model；

Fig. 5 is the circuit diagram of data storage U3 provided by the utility model；

Fig. 6 is the circuit diagram of power-down protection circuit provided by the utility model；

Fig. 7 is the circuit diagram of LCD drive chip U4 provided by the utility model；

Fig. 8 is the circuit diagram of magnetic latching relay J provided by the utility model；

Fig. 9 is the circuit diagram of electric energy computation chip U2 power supply provided by the utility model；

Figure 10 is the circuit diagram of electric energy computation chip U2 provided by the utility model.

Specific embodiment

The utility model is described in detail in each embodiment shown in reference to the accompanying drawing, but it should be stated that, These embodiments are not limitation of the utility model, those of ordinary skill in the art according to these embodiments made by function Energy, method or equivalent transformation or substitution in structure, belong within the protection scope of the utility model.

Embodiment 1

Referring to shown in attached drawing 1-2, one of the present embodiment bluetooth ammeter, including ammeter shell and it is equipped with ammeter shell Interior one-chip computer U1, wherein one-chip computer U1 is connect with feeder ear and user load respectively, and feeder ear is generally state The electric wire output of family's power grid or other power supply units, i.e. one-chip computer U1 are mainly used for the electrical energy transportation of feeder ear to use Family power supply；Wherein, one-chip computer U1 is connect by serial communication port with bluetooth communication U5 port, realizes Bluetooth communication The communication connection of module U5 and the one-chip computer U1 in ammeter；And bluetooth communication U5 with have bluetooth module terminal Equipment connection, realizes the Bluetooth communication of one-chip computer U1 and terminal device.

Specifically, bluetooth communication U5, using CSR mainstream Bluetooth chip, the above consensus standard of bluetooth V2.0；Baud Rate: 4800 ~ 1382400；Support Android phone Bluetooth communication.In the present embodiment, one-chip computer U1 uses macrocrystalline company STC15W413A one-chip computer has 51 core processors, superpower anti-interference ability.The purpose of one-chip computer U1 is, On the one hand the conducting of electricity is connected, the residue of realization power supply, another aspect, electricity consumption and calculating user with counting user is electric The effect of amount, in order to which user checks electricity at any time.

Referring to shown in attached drawing 4, in the present embodiment, Third-party payment platform and and national grid are equipped in terminal device The power purchase system of server connection, user pay expense to power purchase system by Third-party payment platform, and power purchase system receives branch After payment, it is converted into electricity, is sent to terminal device, realizes power purchase；Terminal device passes through the electricity that power purchase system obtains Bluetooth module is sent to one-chip computer U1, realizes the change of electricity data in ammeter；Specifically, Third-party payment platform can be with For Alipay, wechat.The payment platforms such as Mobile banking, and terminal device is mobile phone, in the present embodiment, terminal device supports application Android system, the mobile phone for having function of Bluetooth communication.Because Bluetooth of mobile phone communication has become standard, as long as using The mobile phone of android system, and have function of Bluetooth communication；Therefore special handset model is not necessarily in the present embodiment.Just with all hands Machine can be the same using wechat.It is inner by payment platform as power purchase system power purchase, such as wechat or the included life payment of Alipay Face just has one column of the electricity charge, then by payment, realizes power purchase.In the present embodiment, either which payment platform is ok Electricity is obtained divided by unit price by cash and is sent to subscriber payment mobile phone terminal, and ammeter is sent to by user mobile phone.To then which The electricity of conversion is sent user mobile phone sheerly commercial operation behavior, and these conversion systems etc. by a system, is existing skill Art, (Third-party payment belongs to bridging mode, and Utilities Electric Co. and their both sides of third party separately have billing agreements;Such as: wechat platform Received cash squeezes into Utilities Electric Co.'s account by agreement)；It is the same that it is similar to the existing APP of mobile phone application downloading herein, directly can It realizes.Such as supplement the function of the electricity charge in Alipay with money, it will think using (Alipay, wechat payment) can be paid by mobile terminal The trading to be supplemented with money to Utilities Electric Co. payment platform account, Utilities Electric Co. receives pay successfully after, will need to be written Electricity be sent to the end APP, APP is being sent protocol instructions in ammeter by bluetooth.

When electric supply meter is displayed without electricity or not enough power supply, user can be by Third-party payment platform power purchase, so Power purchase information is sent in the one-chip computer U1 of ammeter by bluetooth afterwards, changes user's remaining capacity in it, realizes power purchase Process.

It further include that the user load that is used to acquire connecting with one-chip computer U1 remains in the present embodiment referring to shown in attached drawing 5 The active metering module of remaining electricity and power consumption, the active metering module be used for acquire user load remaining capacity and Power consumption, meanwhile, active metering module by the data of acquisition by one-chip computer U1, in storing data memory U3.

In the present embodiment, active metering module is exported in a pulsed fashion by pin, the ammeter of different size, every degree electricity Metrical pulse number is different.In the present embodiment, active metering module is active metering chip U2. to commonly use ammeter specification 10(40) A, Kilowatt-hour umber of pulse is to illustrate for (1600imp/kwh) ammeter: 1000 tile load of user runs 1 hour, uses 1 degree Electricity, metering chip U2 sent 1600 pulse signals to the end single-chip microcontroller P27 by the end FC in 1 hour, and computer U1 is received 1600 pulse signals input in electricity from user and reduce 1 kwh, measure 160 pulses and reduce 0.1 degree of electricity, umber of pulse not enough subtracts When except 0.1 degree of electricity, data are temporarily stored among computer RAM.Computer will reduce electricity consumption remaining capacity and electricity consumption from new brush Newly it is stored in U3 memory.

Specifically, U3 memory, model AT24C02, Atmel Corporation, U.S. product.All data of ammeter all pass through Computer CPU is stored in U3 memory and is equivalent to mobile phone EMS memory) user of the P27 pin of one-chip computer U1 acquisition is negative It carries electricity consumption data (i.e. electricity consumption acquisition module) and is stored in data storage U3 after computer is handled.Simultaneous computer U1 can be by number U5 bluetooth module is sent to by serial ports according to the data of concern of user in memory and is sent in user mobile phone by bluetooth, with Inquiry for future reference；Wherein, data storage U3 selects the data storage of model AT24C02, atmel corp's production；It passes through logical Letter interface is connect with one-chip computer U1.

That is the present embodiment realizes the function of direct power purchase by bluetooth module and existing intelligent terminal.

Embodiment 2

As the further improvement of above-described embodiment, in order to avoid the loss of data when circuit power down, referring to 6 institute of attached drawing Show, further include power-down protection circuit in the present embodiment, the power-down protection circuit is connect with one-chip computer U1, is used for user Current supply circuit fall before issue signal so that data are stored in data storage U3 by one-chip computer U1 in time.Exist In user load power supply, when power-down protection circuit detects that circuit will fall, signal is issued, one-chip computer U1 is allowed to shift to an earlier date Storing data.

Specifically, power-down protection circuit include in parallel diode D1, diode D2 and with diode D1, diode D2 Concatenated triode P3, when external power supply is normal, by the alternating current of the transformer T1 secondary coil coupled through diode D1, D2 is rectified into direct current, so that triode P3 is not turned on, single-chip microcontroller receiving end INT pin is high level signal, works as external power supply When power-off, so that triode P3 is connected, single-chip microcontroller receiving end INT pin is low level signal, and single-chip microcontroller judges external power loss, will Computer U1 internal RAM is kept in user power utilization data deposit U3 permanent data storage EEROM, to protect data not lose. External power supply power-off, due to the energy storage property of computer power supply E1 capacitor, so that computer operation power supply is later than power loss signal and breaks Electricity, computer, which has ample time, completely saves data, and when power supply is normal, the data call of preservation is participated in fortune by computer It calculates.The triode P3 is connect with the one-chip computer U1, and the diode D1, diode D2 are connected with external power supply.

Specifically, referring to shown in attached drawing 5, the external power supply include transformer T1 in table, diode D5, diode D6, Diode D7, diode D8 and three terminal regulator W1 composition；The diode D5, diode D6, diode D7 and diode D8 forms full-wave rectifying circuit, and the AC low-tension coil one end transformer T1 connects diode D6 anode and diode D7 cathode, separately One end connects diode D5 anode and diode D8 cathode；The diode D5 cathode and diode D6 cathode export direct current Source anode, and filter to form relay driving power supply VCC through capacitor E1, the first end of the three terminal regulator W1 connects VCC, institute State the second end ground connection of three terminal regulator W1, the third end of the three terminal regulator W1 with for powering to one-chip computer U1 Power vd D connection, the diode D7 anode and diode D8 anode are grounded.

Wherein, transformer T1 primary terminates alternating current 220V power supply, and secondary end low-voltage AC is through diode D5-D8 all-wave Rectification, is converted to direct current, and direct current is electrically accessed the first end of three terminal regulator W1, voltage-stablizer W1 three-polar output direct current 5V electricity Pressure, shows for single-chip microcontroller, bluetooth module, LCD and provides operating voltage.

Specifically, in the present embodiment, relay driving power supply VCC is 12V, it is therefore intended that is subsequent magnetic latching relay J is powered；It and is that the power vd D that one-chip computer U1 powers is5V power supply.5V regulated power supply is steady by tri- end MC7805T Die block provides, maximum exportable 1A electric current, to meet the needs of single-chip microcontroller and control circuit；Wherein, anti-in order to improve power supply Interference performance, the input terminal of power vd D has sealed in magnetic bead, and the power vd D is also parallel with thermistor.Specifically, defeated Enter the end power supply 220V and seal in magnetic bead, the High-frequency Interference of external 100MHz can be effectively suppressed.It is to inhale that power input, which is incorporated to piezoresistance, Receipts surge voltage (such as: lightning stroke), protection ammeter uses safe.

It in the present embodiment, referring to shown in attached drawing 7, uses, also has and one-chip computer in ammeter shell increase for convenience The LCD display of U1 connection, meanwhile, power vd D powers to it, and specifically, power vd D also passes through LCD drive chip U4 and connects There is LCD display；LCD drive chip U4 is the TM1722 of Shenzhen Tian Wei company production.

Referring to shown in attached drawing 3, as the further improvement of the present embodiment, in one-chip computer U1(or single-chip microcontroller) on connect Blue tooth wireless communication module, relay switch are connect, active metering (or referred to as electric energy computation chip) controls power supply and metering Power supply, wherein blue tooth wireless communication module communicates with each other with one-chip computer U1, LCD display for showing, control power supply and Metering power supply is respectively that one-chip computer U1 and active metering are powered, and are controlled power supply while being that relay switch supplies Electricity, its unlatching of controller；Calculating of the active metering for effective power in ammeter.

Embodiment 3

Further improvement as above-described embodiment 2 is referring to shown in attached drawing 8, in order to automatically control power supply or break Electricity further includes set on the magnetic latching relay J, the relay driving power supply VCC between one-chip computer U1 and user load For powering to magnetic latching relay J.When actual circuit connects, the pin of one-chip computer U1 is connected separately with trigger JK26 And trigger JK27, the trigger JK26 are connected by the normally opened contact of triode N1, P2 and the magnetic latching relay J It connects, the trigger JK27 is connect by triode N2, P1 with the normally-closed contact of the magnetic latching relay J.In the present embodiment, It is controlled by the disconnection or closure of magnetic latching relay J by one-chip computer U1 in ammeter, control signal is greater than 80sm Pulse signal；When collecting that remaining capacity is zero in user load ammeter when user's remaining capacity is zero in memory U3, One-chip computer U1 computer by JK26 control terminal export 80sm high level so that triode N1, P2 be connected, magnetic keep after Electric appliance J is closed, and one-chip computer U1 stops to customer power supply；When the electricity that terminal device obtains power purchase system passes through bluetooth mould When block is sent to one-chip computer U1, one-chip computer U1 exports the high level of 80sm by trigger JK27 control terminal, so that Triode N2, P1 conducting, magnetic latching relay J closure, one-chip computer U1 is to customer power supply.

In the present embodiment, electric energy computation chip U2 in the present embodiment is powered, referring to attached by power transformer T1 Shown in Fig. 6 and 9, specifically, power transformer T1 primary exchanges 9V after the diode D4 rectification in Fig. 5 from lotus root coil, then Into Fig. 9, be connected in parallel with a capacitor E2 and be filtered, after a three terminal regulator W2 with the power end of electric energy computation chip U2 Connection.In the present embodiment, three terminal regulator W2 uses W78L05 pressure stabilizing, provides 5V operating voltage for electric energy computation chip U2.By It is not necessarily to excessive voltage in electric energy computation chip U2, therefore 5V operating voltage can be met the requirements.

Referring to shown in attached drawing 10, in the present embodiment, electric energy computation chip U2 is equipped with active metering and samples input terminal, described to have Function metering sampling input terminal is connect with the current supply circuit that user load is powered；The electric energy computation chip U2 samples active metering The sample of input terminal acquisition is calculated as after effective power by F1 pin, F2 pin, then through photoelectrical coupler and relay It is connect after JP3 with the one-chip computer U1.

Specifically, electric energy computation chip U2 uses ADE Co., U.S. ADE7755 electric energy computation chip, meets high-precision 50/ The accuracy requirement of 60Hz and IEC687/1036 standard, in the dynamic range of 1000:1, error is less than 0.1%；Number Word pulse output, average active power after electric current, voltage product through low-pass filtering by obtaining, then converts through voltage-frequency, with The form of frequency is exported from F1, F2 pin, and average active power is directly exported with digit pulse from F1, F2 pin, is led to It crosses photoelectrical coupler and is sent into single-chip data processing, correctly to measure and show data；Real-time active power from CF pin with Digital pulses output, facilitates instrument check.

In the present embodiment, the V2N pin of electric energy computation chip U2 is connected with checking precision and adjusts circuit, the checking precision Adjusting circuit includes being arranged in series eight resistance, and eight resistance are respectively resistance R35, resistance R34, resistance R33, resistance R32, resistance R31, resistance R30, resistance R29 and resistance R28 are correspondingly provided with switch on each resistance.Specifically, it adjusts Whole meter accuracy moves closer to 1%, meanwhile, adjustable error amount is smaller and smaller, and adjustment resistance gradually becomes smaller.It first will be electric Table accesses Ammeter Test device, inputs normal voltage (220V) normalized current (10A), every degree electric standard umber of pulse (1600imp/ Kwh), then the switch of closure R28-R35 of selectivity is adjusted until ammeter measuring accuracy reaches within 1% with realizing.

Specifically, in eight resistance, from resistance R35 to resistance R28, the resistance value is gradually become smaller.

In use, PI+, PI- are that active metering samples input terminal, pass through 250 μ Ω resistance sampling electricity set by current supply circuit High-pass filtering is converted and passed through to the signal of voltage channel, current channel by Σ Δ ADC, then phase by stream, voltage signal Multiply, after the signal of multiplication is using low-pass filtering, number to frequency conversion, digit pulse is exported by CF, F1, F2 pin.

In specifically used, referring to shown in attached drawing 7, the average active metering of electric supply meter is logical by F1 or F2 in a pulsed fashion The P27 pin that photoelectric coupling is sent to one-chip computer U1 through JP3 is crossed, according to xxxximp/kwh, calculates user power consumption, example Such as: 1600imp/kwh indicates 1600 pulses of input, measures 1 kwh.Computer will acquire after data are computed processing and be stored in number According to memory U3, one-chip computer U1 passes through LCD drive chip U4 in LCD liquid crystal display screen by calling memory data On show, while showing ammeter status word, such as: prompt power purchase, user's relay open and close add up electricity consumption, residue Electricity etc.；Realize the inquiry of user.

In the present embodiment, the average active metering of electric supply meter enters photoelectrical coupler JP3 in a pulsed fashion, in photoelectricity coupling Under the action of conjunction, the signal input serial ports that photoelectrical coupler JP3 passes through one-chip computer U1 again will be by photoelectrical coupler JP3's Electric signal inputs one-chip computer U1, after one-chip computer U1 handles the electric signal received, then passes through signal output Serial ports output, the electric signal exported from one-chip computer U1 enter number by exporting the data receiver serial ports that serial ports is connect with signal According to memory U3, the active data acquisition and processing (DAP) to electric supply meter can be completed, the data in data storage U3 can pass through Display device is shown.

In the present embodiment, referring to shown in attached drawing 7, it can also be additionally provided between electric coupler JP3 and one-chip computer U1 Signal amplification circuit, the signal amplification circuit are identified for amplifying the JP3 signal transmitted convenient for one-chip computer U1

Referring to shown in attached drawing 7, signal amplification circuit includes that triode N3, cooperation triode N3 generate amplified signal and act on The source electrode and grid of load resistance R34 and load resistance R35, the triode N3 are electrically connected with power vd D respectively, three pole The grounded drain of pipe N3, the load resistance R34 are connected between power vd D and the grid of the triode N3, the load Resistance R35 is connected between power vd D and the source electrode of the triode N3.

Further, R.C. filter circuit, the R.C. filter circuit load resistance R36 are also parallel on amplifying circuit It is connected in parallel between the grid and drain electrode of the triode N3 with filter capacitor C13, the load resistance R36, the filter capacitor C13 is connected in parallel between the source electrode and drain electrode of the triode N3.

Further, the filter capacitor C23 and filter capacitor for stabilizing circuit are also in series on signal amplification circuit C24, the filter capacitor C23 are connected between load resistance R34 and the grid of the triode N3, the filter capacitor C24 It is connected between load resistance R34 and the grid of the triode N3, the filter capacitor C23 and filter capacitor C24 are in parallel.

In the present embodiment, the average active metering of electric supply meter enters photoelectrical coupler JP3 in a pulsed fashion, by light After being electrically coupled output, it is not directed through signal input serial ports input one-chip computer U1, but first passes through amplifying circuit to passing through The electric signal of photoelectrical coupler JP3 amplifies, and then inputs serial ports by signal and inputs one-chip computer U1, then by monolithic meter The data received are further processed in calculation machine U1.

In the present embodiment, setting signal amplifying circuit, purpose exist between photoelectrical coupler JP3 and one-chip computer U1 It is amplified in the signal by being exported to photoelectrical coupler JP3, it is ensured that one-chip computer U1 can be to the active of electric supply meter Data are accurately identified, since the electric signal of electric supply meter output is usually quite faint, single-chip microcontroller is identifying this slightly Omission can be generated when weak electric signal, so as to cause the data inaccuracy of acquisition, in photoelectrical coupler JP3 and one-chip computer U1 Between increase signal amplification circuit after, can will be amplified by the electric signal of photoelectrical coupler JP3, amplified signal phase It is more easier to be identified by one-chip computer U1 than the signal before amplification, so as to avoid the omission to signal, it is ensured that monolithic meter Acquisition of the calculation machine U1 to all electric supply meter marker signals, and then collected electric supply meter marker signal is handled, An accurately and effectively data support is provided when the final observation related data for user.

In this implementation power, the purpose of setting R.C. filter circuit is to keep the electric signal exported through over-discharge dot circuit One stable state, due to signal amplification circuit during being amplified to electric signal the superior and the subordinate's circuit always occur or it is more Or few checking and balance interacts, and contains alternating component in the voltage inputted in a pulsed fashion, and then produce in circuit Raw ripple to keep the electric signal inputted in one-chip computer U1 unstable, and then influences one-chip computer U1 to receiving The treatment effect of data, the effect of R.C. filter circuit are the alternating components in the DC voltage for reduce as far as possible pulsation, retain it Flip-flop makes the reduction of output voltage ripple coefficient, and waveform becomes smoother, to make the electricity inputted in one-chip computer U1 Signal keeps stable state, and then ensures accuracy of the one-chip computer U1 to the data processed result received.

In the utility model, mainly have bluetooth communication using present smart phone all standard configurations, can with equipped with indigo plant The electric appliance of tooth carries out communication control, such as: it carries out communicating broadcasting music etc. with bluetooth headset, smart phone has become an end Hold application platform.Power consumption management application APP is installed on mobile phone, directly (or passes through the to destination server payment by 4G network Tripartite's payment, such as: use wechat, Alipay), server receives the purchase amount of money, by every degree it is electric how much (x.xxx is first/ Kwh), it is converted to actual purchase electricity, is sent automatically to buyer's mobile phone terminal, buyer is sent to by cell phone application through bluetooth In user's bluetooth ammeter.User is just completed from power purchase to the process institute's purchase of electricity input ammeter.Such as: current every degree electricity 0.498 yuan, user is paid the fees 100 yuan by mobile phone, conversion purchase electricity: 100 0.498=200.8 degree of ÷, server will convert electricity 200.8 degree of amount is sent in purchase user mobile phone, and user will buy 200.8 degree of inputs therewith through bluetooth by APP in mobile phone In the ammeter of Bluetooth communication.Mobile phone passes through query function, the correctness of verify data.

In the present embodiment, on ammeter shell 1, other than relay J and communication module U5 are mounted on bottom case, remaining first device Part is all welded on the front and back sides of pcb board 2, is fixed on above bottom case by thread tapping, and the power supply of ammeter metering then passes through lead Column introduces.

Tool of the series of detailed descriptions listed above only for the feasible embodiment of the utility model Body explanation, they are all without departing from made by the utility model skill spirit not to limit the protection scope of the utility model Equivalent implementations or change should be included within the scope of protection of this utility model.

It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting Related claim.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.

Claims (10)

1. a kind of bluetooth ammeter, which is characterized in that including ammeter shell and be equipped with the intracorporal one-chip computer U1 of electric meter case, institute One-chip computer U1 is stated to connect with feeder ear and user load respectively；The serial communication port of the one-chip computer U1 is connected with Bluetooth communication U5；The bluetooth communication U5 is connect with the terminal device with bluetooth module；

The power purchase system that the terminal device is equipped with Third-party payment platform and connect with national grid server, user pass through Third-party payment platform is converted into electricity after power purchase system receives payment expense to power purchase system payment expense, is sent to terminal Equipment realizes power purchase；The electricity that power purchase system obtains is sent to one-chip computer U1 by bluetooth module by terminal device, is realized The change of electricity data in ammeter；

It further include the active metering module being connect with one-chip computer U1, the active metering module is for acquiring user load Remaining capacity and power consumption, meanwhile, the data of acquisition are passed through one-chip computer U1, storing data storage by active metering module In device U3.

2. a kind of bluetooth ammeter according to claim 1, which is characterized in that it further include power-down protection circuit, the power down Protection circuit is connect with one-chip computer U1, and the current supply circuit for user issues signal before falling, so that one-chip computer U1 Data are stored in time in data storage U3.

3. a kind of bluetooth ammeter according to claim 2, which is characterized in that the power-down protection circuit includes the two of parallel connection Pole pipe D1, diode D2 and with the concatenated triode P3 of diode D1, diode D2, the triode P3 and the monolithic meter The U1 connection of calculation machine, the diode D1, diode D2 are connected with external power supply.

4. a kind of bluetooth ammeter according to claim 3, which is characterized in that the external power supply includes transformer in table T1, diode D5, diode D6, diode D7, diode D8 and three terminal regulator W1；The diode D5, diode D6, two Pole pipe D7 and diode D8 form full-wave rectifying circuit, the AC low-tension coil one end transformer T1 connect diode D6 anode with Diode D7 cathode, the other end connect diode D5 anode and diode D8 cathode；The diode D5 cathode and diode D6 cathode exports DC power anode, and filters to form relay driving power supply VCC through capacitor E1, the three terminal regulator W1's First end connects VCC, the second end ground connection of the three terminal regulator W1, the third end of the three terminal regulator W1 with for list The power vd D connection of piece computer U1 power supply, the diode D7 anode and diode D8 anode are grounded.

5. a kind of bluetooth ammeter according to claim 4, which is characterized in that the input terminal of the power vd D has sealed in magnetic Pearl, and the power vd D is also parallel with thermistor.

6. a kind of bluetooth ammeter according to claim 5, which is characterized in that further include being set to one-chip computer U1 and user Magnetic latching relay J, the relay driving power supply VCC between load is for powering to magnetic latching relay J.

7. a kind of bluetooth ammeter according to claim 6, which is characterized in that the pin of the one-chip computer U1 connects respectively It is connected to trigger JK26 and trigger JK27, the trigger JK26 passes through triode N1, P2 and the magnetic latching relay J Normally opened contact connection, the trigger JK27 connected by the normally-closed contact of triode N2, P1 and the magnetic latching relay J It connects.

8. -7 any a kind of bluetooth ammeter according to claim 1, which is characterized in that the active metering module is electric energy Metering chip U2, the electric energy computation chip U2 are equipped with active metering and sample input terminal, the active metering sample input terminal and The current supply circuit connection of user load power supply；The sample meter that the electric energy computation chip U2 acquires active metering sampling input terminal Be counted as after effective power through F1 pin, F2 pin, then after photoelectrical coupler and relay JP3 with the monolithic meter The U1 connection of calculation machine.

9. a kind of bluetooth ammeter according to claim 8, which is characterized in that the V2N pin of the electric energy computation chip U2 It is connected with checking precision and adjusts circuit, it includes being arranged in series eight resistance, eight resistance that the checking precision, which adjusts circuit, Respectively resistance R35, resistance R34, resistance R33, resistance R32, resistance R31, resistance R30, resistance R29 and resistance R28, each Switch is correspondingly provided on the resistance.

10. a kind of bluetooth ammeter according to claim 9, which is characterized in that in eight resistance, from resistance R35 to Resistance R28, the resistance value gradually become smaller.