CN104237630A - Single-phase electronic type keyboard prepayment meter - Google Patents
Single-phase electronic type keyboard prepayment meter Download PDFInfo
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- CN104237630A CN104237630A CN201310243824.7A CN201310243824A CN104237630A CN 104237630 A CN104237630 A CN 104237630A CN 201310243824 A CN201310243824 A CN 201310243824A CN 104237630 A CN104237630 A CN 104237630A
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- 238000001514 detection method Methods 0.000 claims abstract description 62
- 238000013500 data storage Methods 0.000 claims abstract description 9
- 238000005070 sampling Methods 0.000 claims description 38
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 24
- 239000003990 capacitor Substances 0.000 claims description 24
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- 230000007935 neutral effect Effects 0.000 claims description 12
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- 238000004891 communication Methods 0.000 claims description 7
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Abstract
The invention discloses a single-phase electronic type keyboard prepayment meter which comprises an SOC interface circuit, a power supply circuit and a power failure detection circuit. The power failure detection circuit detects a direct current power source output by the power supply circuit. When the situation that the voltage of the direct current output by power supply circuit is larger than or equal to a preset voltage threshold valve is detected by the power failure detection circuit, the power failure detection circuit outputs a connecting signal to the SOC interface circuit, the SOC interface circuit operates normally. When the situation that the voltage of the direct current output by power supply circuit is smaller than or equal to the preset voltage threshold valve is detected by the power failure detection circuit, the power failure detection circuit outputs an interrupt signal to the SOC interface circuit, and the SOC interface circuit executes power failure data storage action. According to the single-phase electronic type keyboard prepayment meter, the power failure detection circuit can accurately detect the magnitude of the direct current output by the power supply circuit, and the reliability of the operation of the single-phase electronic type keyboard prepayment meter is guaranteed.
Description
Technical field
The present invention relates to a kind of instrument, specifically a kind of electronic single-phase keyboard prepayment meter, belongs to electric meter technical field.
Background technology
The prepayment meter used in the market adopts various technology to reach the object of recharging and paying, such as Contact Type Ic Card is supplemented with money, non-contact radio frequency cards is supplemented with money, telecommunication is supplemented with money, mode of more than supplementing with money respectively has shortcoming: Contact Type Ic Card is supplemented with money to be needed IC-card to insert in draw-in groove could realize charging business, but the draw-in groove of Contact Type Ic Card is easily caused supplementing with money by pernicious destruction; Non-contact radio frequency cards is supplemented with money and only radio-frequency card need be put in radio-frequency region and can realize recharging service, although non-contact radio frequency cards is without the need to inserting in draw-in groove by radio-frequency card, but non-contact radio frequency cards is vulnerable to electromagnetic interference (EMI) around causes Card Reader to be made mistakes, impact uses; Telecommunication is supplemented with money and is realized recharging service by telecommunication, although this mode avoids draw-in groove easily by pernicious destruction, the shortcoming being subject to electromagnetic interference (EMI) around, but in communication, data transmission may make mistakes, and stability and the reliability of this mode are in urgent need to be improved.Middle East power consumer widely uses a kind of novel prepayment mode now, user profile and power purchase information are combined generation one group encryption code by management system, the encrypted code of acquisition is carried out prepaid data by the numeric keypad on ammeter and is input in ammeter by user oneself, and ammeter obtains prestoring electricity or the amount of money preserve after correct deciphering.This way of paying are supplemented with money owing to adopting the keyboard that carries of ammeter to complete, and are commonly referred to keyboard prepayment meter.The electricity charge of keyboard prepayment meter pre-payment are supplied to user with code shape, avoid on the one hand telecommunication to supplement middle data with money and transmit the problem that may make mistakes, another aspect need not use card to supplement with money, and its ammeter does not need and external interface, good airproof performance, prevents artificial destruction.But it is not how keyboard prepayment meter detects the power down of keyboard prepayment meter, also open at present.
Summary of the invention
The invention provides a kind of electronic single-phase keyboard prepayment meter.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of electronic single-phase keyboard prepayment meter, comprises SOC interface circuit, power circuit and power-fail detection circuit, wherein,
Power circuit, comprising one externally provides galvanic output terminal;
SOC interface circuit, comprises a control end, and when described control end receives connection signal, described SOC interface circuit normally runs; When described control end receives look-at-me, described SOC interface circuit performs power failure data and preserves action;
Power-fail detection circuit, comprise an input end and an output terminal, the input end of described power-fail detection circuit is connected with the output terminal of described power circuit, for receiving the direct current that described power circuit provides; The output terminal of described power-fail detection circuit is connected with the control end of described SOC interface circuit; Described power-fail detection circuit is used for the direct current that the described power circuit of detection in real time provides, and testing result is sent to the control end of described SOC interface circuit; When described power-fail detection circuit detects that described direct current is greater than or equal to predetermined voltage threshold, described power-fail detection circuit exports connection signal to described SOC interface circuit; When described power-fail detection circuit detects that described direct current is less than described predetermined voltage threshold, described power-fail detection circuit exports look-at-me to described SOC interface circuit.
Described electronic single-phase keyboard prepayment meter, described SOC interface circuit comprises system level chip ATT7035AU and peripheral circuit thereof.
Described electronic single-phase keyboard prepayment meter, described power circuit comprises AC/DC power-switching circuit and system works power circuit, described AC/DC power-switching circuit is used for externally providing direct current, and described system works power circuit is for providing the working power of system; Described AC/DC power-switching circuit comprises voltage dependent resistor (VDR) RV1, transformer TC1, diode D23, D24, D25, D26, and described diode D23, D24, D25, D26 form full-bridge rectifier; Described system works power circuit comprises electric capacity C2, C4, C7, C8, C9, polar capacitor C1, C3, power supply voltage stabilizing chip 7805, voltage adjuster XC6214P332PR; Alternating current connects the primary coil of described transformer TC1 by described voltage dependent resistor (VDR) RV1, the secondary coil of described transformer TC1 connects the input end of described full-bridge rectifier, and the output terminal of described full-bridge rectifier provides input signal as the output terminal of described AC/DC power-switching circuit to described power-fail detection circuit; The output terminal of described full-bridge rectifier, the positive pole of described polar capacitor C1 connect the IN pin of described power supply voltage stabilizing chip 7805 jointly after being connected with one end of described electric capacity C2, the negative pole of described polar capacitor C1 is connected rear common ground with the other end of described electric capacity C2; Connect the OUT pin of described power supply voltage stabilizing chip 7805 and the Vin pin of described voltage adjuster XC6214P332PR after one end connection of the positive pole of described polar capacitor C3, described electric capacity C4, C9, the negative pole of described polar capacitor C3 is connected rear common ground with the other end of described electric capacity C4, C9 simultaneously; The GND pin ground connection of described voltage adjuster XC6214P332PR and described power supply voltage stabilizing chip 7805, one end ground connection after described electric capacity C7, C8 parallel connection, the Vout pin of voltage adjuster XC6214P332PR described in another termination.
Described electronic single-phase keyboard prepayment meter, described power-fail detection circuit comprises resistance R2, R3, R4, R6, electric capacity C6, triode V1, V3; One end of described resistance R4 as described power-fail detection circuit input termination described in the output terminal of full-bridge rectifier, the other end of described resistance R4, one end of described resistance R6 are connected with one end of described electric capacity C6 and their tie point connects the base stage of described triode V3, common ground after the emitter of described triode V3, the other end of described resistance R6 are connected with the other end of described electric capacity C6; The collector of described triode V3, one end of described resistance R3 are connected with the base stage of described triode V1, and the other end of described resistance R3 is connected with one end of described resistance R2 and their tie point connects the Vout pin of described voltage adjuster XC6214P332PR; The other end of described resistance R2 is connected with one end of the collector of described triode V1 and described electric capacity C5, and their tie point connects 3 and 21 pins of described ATT7035AU; The emitter of described triode V1 is connected rear common ground with the other end of described electric capacity C5.
Described electronic single-phase keyboard prepayment meter, also comprises control relay circuit, and described control relay circuit comprises L phase relay control circuit and N phase relay control circuit; Described L phase relay control circuit is identical with described N phase relay control circuit structure, wherein, described L phase relay control circuit and described N phase relay control circuit include triode V4, V5, V8, V9, V12, V13, resistance R7, R8, R11, R12, R15, R16, R19, R20, R23, R24, R27, R28 and diode D6, D7, D10, D11 and magnetic latching relay;
One end of described resistance R15 is connected with one end of described resistance R19 and their tie point connects the base stage of described triode V9, 95 pins of ATT7035AU described in another termination of described resistance R15, the other end of described resistance R19 connects 94 pins of described ATT7035AU simultaneously, the emitter of described triode V9 and one end of described resistance R23, the other end of described resistance R23 connects the base stage of described triode V13 and one end of described resistance R27 simultaneously, the other end of described resistance R27, the emitter of described triode V13 is connected rear common ground with the positive pole of described diode D10, one end of described magnetic latching relay drive coil is connect after the collector of the negative pole of described diode D10, the collector of described triode V13, described triode V5 is connected with the positive pole of described diode D6, the collector of described triode V9 connects one end of described resistance R11, the other end of described resistance R11 is connected with one end of described resistance R7 and their tie point connects the base stage of described triode V5, and the emitter of described triode V5, the other end of described resistance R7 are connected with the negative pole of described diode D6 and their tie point connects the output terminal of described full-bridge rectifier,
One end of described resistance R16 is connected with one end of described resistance R20 and their tie point connects the base stage of described triode V8, 94 pins of ATT7035AU described in another termination of described resistance R16, the other end of described resistance R20 connects 95 pins of described ATT7035AU simultaneously, the emitter of described triode V8 and one end of described resistance R24, the other end of described resistance R24 connects the base stage of described triode V12 and one end of described resistance R28 simultaneously, the other end of described resistance R28, the emitter of described triode V12 is connected rear common ground with the positive pole of described diode D11, the other end of described magnetic latching relay drive coil is connect after the collector of the negative pole of described diode D11, the collector of described triode V12, described triode V4 is connected with the positive pole of described diode D7, the collector of described triode V8 connects one end of described resistance R12, after one end of the other end of described resistance R12, described resistance R8 connects, their tie point connects the base stage of described triode V4, and the emitter of described triode V4, the other end of described resistance R8 are connected with the negative pole of described diode D7 afterwards and their tie point connects the output terminal of described full-bridge rectifier.
Described electronic single-phase keyboard prepayment meter, described power circuit also comprises the system power supply commutation circuit of the standby power supply providing system works, and described system power supply commutation circuit comprises electric capacity C11 and polar capacitor C10 and standby power supply; The positive pole of described polar capacitor C10 is connected with one end of electric capacity C11 and their tie point connects 90 pins of described ATT7035AU and described standby power supply positive pole, and the negative pole of described polar capacitor C10 is connected rear common ground with the other end of electric capacity C11; The negative pole of described standby power supply is by J2 and JP-2 ground connection.
Described electronic single-phase keyboard prepayment meter, also comprise communicating circuit, described communicating circuit is magnetic adsorption type infrared communication circuit, described magnetic adsorption type infrared communication circuit comprises receiving circuit and radiating circuit, described receiving circuit comprises resistance R31, R36, R38, R40 and triode V16 and infrared receiving tube D14, and described radiating circuit comprises resistance R32, R37, R39 and triode V17 and infrared transmitting tube D15;
One end of the negative pole of described infrared receiving tube D14, described resistance R31 connects and their tie point connects the Vout pin of described voltage adjuster XC6214P332PR, the positive pole of described infrared receiving tube D14, one end of described resistance R38 are connected with one end of described resistance R36, the base stage of triode V16 described in another termination of described resistance R36, collector, the other end of described resistance R31 of described triode V16 are connected with 29 pins of described ATT7035AU; One end of resistance R40 described in another termination of described resistance R38, the emitter of described triode V16 is connected rear common ground with the other end of described resistance R40;
30 pins of ATT7035AU described in one termination of described resistance R37, the base stage of described triode V17 is connect after the other end is in parallel with one end of described resistance R32, the Vout pin of described voltage adjuster XC6214P332PR is jointly connect after the other end of described resistance R32 is connected with the emitter of described triode V17, the emitter of described triode V17 is connected with the positive pole of described infrared transmitting tube D15 by described resistance R39, the minus earth of described infrared transmitting tube D15.
Described electronic single-phase keyboard prepayment meter, also comprise keyboard circuit, described keyboard circuit comprises resistance R61, R62, R63, R65, R66, R69, R72, R73, R74, R75, electric capacity C43, C44, C45, C46, C47, C48, C49 and carbon Key Pad KEY1, KEY2, KEY3, KEY4, KEY5, KEY6, KEY7 and chip XHC3-7A;
1 pin of described chip XHC3-7A passes through one end of described resistance R65 and described resistance R61, described carbon Key Pad KEY1 is jointly met after one end connection of described electric capacity C43,2 pins of described chip XHC3-7A pass through one end of described resistance R66 and described resistance R62, described carbon Key Pad KEY2 is jointly met after one end connection of described electric capacity C44, described carbon Key Pad KEY3 is jointly met after 3 pins of described chip XHC3-7A are connected with one end of described resistance R63 and one end of described electric capacity C45 by described resistance R69, described carbon Key Pad KEY4 is jointly met after 4 pins of described chip XHC3-7A are connected with one end of described electric capacity C46 by described resistance R72, described carbon Key Pad KEY5 is jointly met after 5 pins of described chip XHC3-7A are connected with one end of described electric capacity C47 by described resistance R73, described carbon Key Pad KEY6 is jointly met after 6 pins of described chip XHC3-7A are connected with one end of described electric capacity C48 by described resistance R74, described carbon Key Pad KEY7 is jointly met after 7 pins of described chip XHC3-7A are connected with one end of described electric capacity C49 by described resistance R75, the other end of described resistance R61, the other end of described resistance R62 connect the Vout pin of described voltage adjuster XC6214P332PR jointly after being connected with the other end of described resistance R63, common ground after the other end of described C43, the other end of described C44, the other end of described C45, the other end of described C46, the other end of described C47, the other end of described C48 are connected with the other end of described C49.
Described electronic single-phase keyboard prepayment meter, also comprise alternating current sampling circuit, described alternating current sampling circuit comprises current sampling circuit and voltage sampling circuit, described current sampling circuit comprises resistance R42, R43, R44, R45, R46, R47, R48, R49, R50, R51, electric capacity C19, C20; Described voltage sampling circuit comprises resistance R52, R53, R56, R58, R59, R60, R88, R89, R90, electric capacity C22, C23, C31, C33;
One end ground connection after described resistance R50 is in parallel with described electric capacity C19,8 pins of ATT7035AU described in another termination, connect N line by described resistance R42, R43, R44, R45, R46, R47, R48, R49 simultaneously, one end ground connection after described resistance R51 is in parallel with described electric capacity C20,9 pins of ATT7035AU described in another termination;
One end of described resistance R56 is connected with one end of described resistance R58 and their the link connecting to neutral line current sampling end of the second current transformer of sampling, the other end of described resistance R58 is connected rear ground connection with one end of described resistance R59, the other end of described resistance R59 is connected with one end of described resistance R60 and their the link connecting to neutral line current reference edge of the second current transformer of sampling, 11 pins of described chip ATT7035AU are connect after the other end of described resistance R60 and one end link of described electric capacity C33, the other end of described electric capacity C33 is connected rear ground connection with one end of described electric capacity C31, 10 pins of described chip ATT7035AU are connect after the other end of described electric capacity C31 is connected with the other end of described resistance R56,
One end of described resistance R52 is connected with one end of described resistance R88 and their link connects the sampling end of the first current transformer that one end of described resistance R89 and neutral line current are sampled simultaneously, the other end of described resistance R88 is connected rear ground connection with one end of described resistance R90, the other end of described resistance R90 is connected with one end of described resistance R53 and their link connects the reference edge of the first current transformer that the other end of described resistance R89 and neutral line current are sampled simultaneously, the other end of described resistance R53 is connected 13 pins of chip ATT7035AU described in termination with one end of described electric capacity C23, the other end of described electric capacity C23 is connected rear ground connection with one end of described electric capacity C22, 12 pins of described ATT7035AU are connect after the other end of described electric capacity C22 is connected with the other end of described resistance R52.
Described electronic single-phase keyboard prepayment meter, also comprise strong magnetic sensor circuit, backlight screen control circuit, buzzer alarm circuit, table cover and end button cover open detection circuit, meritorious impulse output circuit and second merit impulse output circuit;
Described strong magnetic sensor circuit comprises chip PT3661, electric capacity C39, C41, resistance R64, the OUT pin of described chip PT3661, one end of described resistance R64 connect 86 pins of described ATT7035AU jointly after being connected with one end of described electric capacity C41, the other end of described resistance R64, one end of described electric capacity C39 connect the Vout pin of described voltage adjuster XC6214P332PR jointly after being connected with the VDD pin of described chip PT3661, common ground after the other end of described electric capacity C39, the other end of described electric capacity C41 are connected with the GND pin of described chip PT3661;
Described backlight screen control circuit comprises triode V19, V20, V21, resistance R77, R78, R79, R83, R84, R85, electric capacity C50, C51, C52, C53, light emitting diode D0, D18, D19, D20, the Vout pin of voltage adjuster XC6214P332PR described in one termination of described resistance R83, the other end of described resistance R83 connects the positive pole of described light emitting diode D19 and one end of described electric capacity C51 simultaneously, jointly connects 56 pins of described ATT7035AU after the negative pole of described light emitting diode D19 is connected with the other end of described electric capacity C51, 28 pins of ATT7035AU described in one termination of described resistance R78, the base stage of triode V19 described in the other end of described resistance R78, the emitter of described triode V19 connects the Vout pin of described voltage adjuster XC6214P332PR, the collector of described triode V19 connects one end of described resistance R82, the other end of described resistance R82 connects one end of described electric capacity C50 and the positive pole of described light emitting diode D18 simultaneously, and the other end of described electric capacity C50 is connected rear common ground with the negative pole of described light emitting diode D18, 55 pins of ATT7035AU described in one termination of described resistance R79, the base stage of triode V21 described in the other end of described resistance R79, the collector of described triode V21 connects one end of described resistance R85, and the other end of described resistance R85 connects the positive pole of one end of described electric capacity C53, described light emitting diode D20 simultaneously, 54 pins of ATT7035AU described in one termination of described resistance R77, the base stage of triode V20 described in the other end of described resistance R77, the Vout pin of described voltage adjuster XC6214P332PR is connect after the emitter of described triode V20 is connected with the emitter of described triode V21, the collector of described triode V20 connects one end of described resistance R84, the other end of described resistance R84 connects one end of described electric capacity C52 and the positive pole of described light emitting diode D0 simultaneously, the other end of described electric capacity C52, the negative pole of described light emitting diode D0, the other end of described electric capacity C53 is connected rear common ground with the negative pole of described light emitting diode D20,
Described buzzer alarm circuit comprises resistance R80, R81, R86, electric capacity C54, diode D17, triode V22, hummer M1, 22 pins of ATT7035AU described in one termination of described resistance R86, the other end of described resistance R86, the base stage of described triode V22 is connect after one end connection of described electric capacity C54, the other end of described electric capacity C54 is connected rear common ground with the collector of described triode V22, the emitter of described triode V22 connects the positive pole of described diode D17 and one end of described hummer M1 simultaneously, the negative pole of described diode D17, the other end of described hummer M1 is connected with one end of described resistance R81 with one end of described resistance R80, the Vout pin of described voltage adjuster XC6214P332PR is jointly connect after the other end of described resistance R80 is connected with the other end of described resistance R81,
Described table cover and end button cover open detection circuit comprise resistance R70, R71, electric capacity C40, C42, button S1, S2; One end of one end of described resistance R70, one end of described resistance R70, described electric capacity C40 is connected rear common ground with one end of described electric capacity C42, the other end of described resistance R70, the other end of described electric capacity C40 connect 4 pins of described ATT7035AU jointly after being connected with 2 pins of described button S1, the other end of described resistance R71, the other end of described electric capacity C42 connect 5 pins of described ATT7035AU jointly after being connected with 2 pins of described button S2, jointly connect 92 pins of described ATT7035AU after 1 pin of described button S1 is connected with 1 pin of described button S2;
Described meritorious impulse output circuit comprises the first photoelectrical coupler TLP785, resistance R67, R68, R76, triode V18, diode D21, light emitting diode D16, electric capacity C38; 33 pins of ATT7035AU described in one termination of described resistance R76, the base stage of triode V18 described in another termination of described resistance R76, the grounded emitter of described triode V18, the collector of described triode V18 connects one end of described resistance R67 and one end of described resistance R68 simultaneously, an input end of the first photoelectrical coupler TLP785 described in another termination of described resistance R68, the other end of described resistance R67 connects one end of described electric capacity C38 and the negative pole of described light emitting diode D16 simultaneously, the other end of described electric capacity C38, the Vout pin of described voltage adjuster XC6214P332PR is jointly connect after the positive pole of described light emitting diode D16 is connected with another input end of described first photoelectrical coupler TLP785, jointly connect auxiliary terminal pulse of gaining merit after the output terminal of described first photoelectrical coupler TLP785 is connected with described diode D21 negative pole and export sampling end, jointly connect auxiliary terminal pulse of gaining merit after another output terminal of described first photoelectrical coupler TLP785 is connected with described diode D1 positive pole and export reference edge,
Described second, merit impulse output circuit comprised the second photoelectrical coupler TLP785, resistance R91, R54, triode V23, diode D22, 21 pins of ATT7035AU described in one termination of described resistance R91, the base stage of triode V23 described in another termination, the grounded emitter of described triode V23, the collector of described triode V23 connects one end of described resistance R54, an input end of the second photoelectrical coupler TLP785 described in another termination of described resistance R54, the Vout pin of voltage adjuster XC6214P332PR described in another input termination of described second photoelectrical coupler TLP785, jointly connect auxiliary terminal pulse per second (PPS) after the output terminal of described second photoelectrical coupler TLP785 is connected with described diode D22 negative pole and export sampling end, jointly connect auxiliary terminal pulse per second (PPS) after another output terminal of described second photoelectrical coupler TLP785 is connected with described diode D22 positive pole and export reference edge.
Described electronic single-phase keyboard prepayment meter, also comprise data storage circuitry, described data storage circuitry comprises storage chip BR24G128FJ-WE2, electric capacity C15, resistance R34, R35, one end of described electric capacity C15, 8 pins of described storage chip BR24G128FJ-WE2, 92 pins of described ATT7035AU are jointly connect after one end of described resistance R34 is connected with one end of described resistance R35, 1 pin of described ATT7035AU is jointly connect after 6 pins of described storage chip BR24G128FJ-WE2 are connected with the other end of described resistance R34, 2 pins of described ATT7035AU are jointly connect after 5 pins of described storage chip BR24G128FJ-WE2 are connected with the other end of described resistance R35, the other end of described electric capacity C15 and 1 pin of described storage chip BR24G128FJ-WE2, 2 pins, 3 pins, 4 pins, common ground after 7 pins connect.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) electronic single-phase keyboard prepayment meter of the present invention, comprise SOC interface circuit, power circuit and power-fail detection circuit, power-fail detection circuit detects the direct current that power circuit exports, when power-fail detection circuit detects that the direct current that power circuit exports is greater than or equal to predetermined voltage threshold, described power-fail detection circuit exports connection signal to described SOC interface circuit, described SOC interface circuit normally runs, when power-fail detection circuit detects that the direct current that power circuit exports is less than described predetermined voltage threshold, described power-fail detection circuit exports look-at-me to described SOC interface circuit, described SOC interface circuit performs power failure data and preserves action.Electronic single-phase keyboard prepayment meter power-fail detection circuit provided by the invention accurately can detect power circuit and export galvanic size, ensures electronic single-phase keyboard prepayment meter reliability of operation.
(2) electronic single-phase keyboard prepayment meter of the present invention, comprises system level chip ATT7035AU, and ATT7035AU is integrated with metering module, clock circuit module, LCD driver module and cpu resource as SOC system level chip, and integrated level is high.
(3) electronic single-phase keyboard prepayment meter of the present invention, comprises control relay circuit, controls magnetic latching relay drive coil polarity of voltage and direction of current.
(4) electronic single-phase keyboard prepayment meter of the present invention, comprise communicating circuit, keyboard circuit, table cover and end button cover open detection circuit, alternating current sampling circuit, strong magnetic sensor circuit, backlight screen control circuit, buzzer alarm circuit, meritorious impulse output circuit, second merit impulse output circuit, data storage circuitry, compared with prior art, integrated level is higher, with low cost, design is succinct reliable, can large-scale production.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below in conjunction with accompanying drawing, the present invention is further detailed explanation, wherein,
Fig. 1 is the structural representation of electronic single-phase keyboard prepayment meter of the present invention;
Fig. 2 is ATT7035AU and the interface schema of electronic single-phase keyboard prepayment meter of the present invention;
Fig. 3 is the power circuit diagram of electronic single-phase keyboard prepayment meter of the present invention;
Fig. 4 is the system power supply commutation circuit figure of electronic single-phase keyboard prepayment meter of the present invention;
Fig. 5 is the power-fail detection circuit figure of electronic single-phase keyboard prepayment meter of the present invention;
Fig. 6 is the control relay circuit figure of electronic single-phase keyboard prepayment meter of the present invention;
Fig. 7 is the communicating circuit figure of electronic single-phase keyboard prepayment meter of the present invention;
Fig. 8 is the keyboard circuit figure of electronic single-phase keyboard prepayment meter of the present invention;
Fig. 9 is the alternating current sampling circuit figure of electronic single-phase keyboard prepayment meter of the present invention;
Figure 10 is the strong magnetic sensor circuit figure of electronic single-phase keyboard prepayment meter of the present invention;
Figure 11 is table cover and the end button cover open detection circuit diagram of electronic single-phase keyboard prepayment meter of the present invention;
Figure 12 is the backlight screen control circuit figure of electronic single-phase keyboard prepayment meter of the present invention;
Figure 13 is the buzzer alarm circuit figure of electronic single-phase keyboard prepayment meter of the present invention;
Figure 14 is the meritorious impulse output circuit figure of electronic single-phase keyboard prepayment meter of the present invention;
Figure 15 is merit impulse output circuit figure second of electronic single-phase keyboard prepayment meter of the present invention;
Figure 16 is the data storage circuitry figure of electronic single-phase keyboard prepayment meter of the present invention.
Reference numeral: 1-SOC interface circuit, 2-power circuit, 3-power-fail detection circuit.
Embodiment
embodiment 1:
As shown in Figure 1, it comprises SOC interface circuit 1, power circuit 2 and power-fail detection circuit 3 to the structure of electronic single-phase keyboard pre-payment electric energy watch circuit of the present invention, and wherein, power circuit 2 comprises one externally provides galvanic output terminal; SOC interface circuit 1, comprises a control end, and when described control end receives connection signal, described SOC interface circuit 1 normally runs; When described control end receives look-at-me, described SOC interface circuit 1 performs power failure data and preserves action; Power-fail detection circuit 3, comprises an input end and an output terminal, and the input end of described power-fail detection circuit 3 is connected with the output terminal of described power circuit 2, for receiving the direct current that described power circuit 2 provides; The output terminal of described power-fail detection circuit 3 is connected with the control end of described SOC interface circuit 1; The direct current that described power-fail detection circuit 3 provides for detecting described power circuit 2 in real time, and control end testing result being sent to described SOC interface circuit 1; When described power-fail detection circuit 3 detects that described direct current is greater than or equal to predetermined voltage threshold, described power-fail detection circuit 3 exports connection signal to described SOC interface circuit 1; When described power-fail detection circuit 3 detects that described direct current is less than described predetermined voltage threshold, described power-fail detection circuit 3 exports look-at-me to described SOC interface circuit 1.
In the present embodiment, shown in Figure 2, described SOC interface circuit 1 comprises system level chip ATT7035AU, and ATT7035AU is integrated with metering module, clock circuit module, LCD driver module and MCU resource as SOC system level chip.
In the present embodiment, described power circuit 2 comprises for externally providing galvanic AC/DC power-switching circuit and for providing the system works power circuit of the working power of system; Shown in Figure 3, described AC/DC power-switching circuit comprises voltage dependent resistor (VDR) RV1, transformer TC1, diode D23, D24, D25, D26, and described diode D23, D24, D25, D26 form full-bridge rectifier; Described system works power circuit comprises electric capacity C2, C4, C7, C8, C9, polar capacitor C1, C3, power supply voltage stabilizing chip 7805, voltage adjuster XC6214P332PR.
Alternating current connects the primary coil of described transformer TC1 by described voltage dependent resistor (VDR) RV1, the secondary coil of described transformer TC1 connects the input end of described full-bridge rectifier, and the output terminal of described full-bridge rectifier provides input signal as the output terminal of described AC/DC power-switching circuit to described power-fail detection circuit 3; The output terminal of described full-bridge rectifier, the positive pole of described polar capacitor C1 connect the IN pin of described power supply voltage stabilizing chip 7805 jointly after being connected with one end of described electric capacity C2, the negative pole of described polar capacitor C1 is connected rear common ground with the other end of described electric capacity C2; Connect the OUT pin of described power supply voltage stabilizing chip 7805 and the Vin pin of described voltage adjuster XC6214P332PR after one end connection of the positive pole of described polar capacitor C3, described electric capacity C4, C9, the negative pole of described polar capacitor C3 is connected rear common ground with the other end of described electric capacity C4, C9 simultaneously; The GND pin ground connection of described voltage adjuster XC6214P332PR and described power supply voltage stabilizing chip 7805, one end ground connection after described electric capacity C7, C8 parallel connection, the Vout pin of voltage adjuster XC6214P332PR described in another termination, the Vout pin of described voltage adjuster XC6214P332PR as the output terminal of described system works power circuit for providing the working power of system.
As other embodiments, described power circuit 2 also comprises the system power supply commutation circuit of the standby power supply providing system works, shown in Figure 4, and described system power supply commutation circuit comprises electric capacity C11 and polar capacitor C10 and standby power supply; The positive pole of described polar capacitor C10 is connected with one end of electric capacity C11 and their tie point connects 90 pins of described chip ATT7035AU and described standby power supply positive pole, and the negative pole of described polar capacitor C10 is connected rear common ground with the other end of electric capacity C11; The negative pole of described standby power supply is by J2 and JP-2 ground connection.
Low consumption circuit power supply takes from the 92nd pin of described chip ATT7035AU, described power down low-power dissipation power supply is not directly connected with described standby power supply, described standby power supply positive pole is connected with the 90th pin of described chip ATT7035AU, is controlled by described chip ATT7035AU internal electric source commutation circuit.
In the inner integrated power supply commutation circuit of described chip ATT7035AU, 2.8V can be set to electrical source exchange voltage, 3.0V, 3.2V third gear, for 3.0V predetermined threshold value: when normally using, cpu power VDD3P3 is provided by the Vout pin of the voltage adjuster XC6214P332PR in system works power circuit, switched voltage threshold value is at register inner setting and by after enable for electrical source exchange function, when the system works power supply VSYS Voltage Drop that the Vout pin of voltage adjuster XC6214P332PR provides is at below 3.0V, chip ATT7035AU implements electrical source exchange automatically in inside, cpu power VDD3P3 is provided by the described standby power supply of described system power supply commutation circuit.
Shown in Figure 5, described power-fail detection circuit 3 comprises resistance R2, R3, R4, R6, electric capacity C6, triode V1, V3; One end of described resistance R4 as described power-fail detection circuit 3 input termination described in the output terminal of full-bridge rectifier, the other end of described resistance R4, one end of described resistance R6 are connected with one end of described electric capacity C6 and their tie point connects the base stage of described triode V3, common ground after the emitter of described triode V3, the other end of described resistance R6 are connected with the other end of described electric capacity C6; The collector of described triode V3, one end of described resistance R3 are connected with the base stage of described triode V1, and the other end of described resistance R3 is connected with one end of described resistance R2 and their tie point connects the Vout pin of described voltage adjuster XC6214P332PR; The other end of described resistance R2 is connected with one end of the collector of described triode V1 and described electric capacity C5, and their tie point connects 3 and 21 pins of described ATT7035AU; The emitter of described triode V1 is connected rear common ground with the other end of described electric capacity C5.
The voltage of the output terminal out-put supply of described full-bridge rectifier after described resistance R4, R6 dividing potential drop as the input signal of described triode V3.When the output supply voltage of described full-bridge rectifier is higher than 7V, described triode V3 conducting, described triode V1 ends, and 3 pins of described chip ATT7035AU obtain the connection signal of digital logic high levels, and namely normally power on running status; When the output supply voltage of described full-bridge rectifier is lower than 7V, described triode V3 ends, described triode V1 conducting, 3 pins of described chip ATT7035AU obtain the look-at-me of digital logic low levels, described chip ATT7035AU thinks civil power power down, now system can also maintain certain hour and normally works, and before starting to carry out power down, related data is preserved, and then waiting system electrical source exchange enters low power consumpting state.
embodiment 2:
On the basis of above-described embodiment, also comprise control relay circuit, described control relay circuit comprises L phase relay control circuit and N phase relay control circuit; Described L phase relay control circuit is identical with described N phase relay control circuit structure, shown in Figure 6, described L phase relay control circuit and described N phase relay control circuit include triode V4, V5, V8, V9, V12, V13, resistance R7, R8, R11, R12, R15, R16, R19, R20, R23, R24, R27, R28 and diode D6, D7, D10, D11 and magnetic latching relay;
One end of described resistance R15 is connected with one end of described resistance R19 and their tie point connects the base stage of described triode V9, 95 pins of ATT7035AU described in another termination of described resistance R15, the other end of described resistance R19 connects 94 pins of described ATT7035AU simultaneously, the emitter of described triode V9 and one end of described resistance R23, the other end of described resistance R23 connects the base stage of described triode V13 and one end of described resistance R27 simultaneously, the other end of described resistance R27, the emitter of described triode V13 is connected rear common ground with the positive pole of described diode D10, one end of described magnetic latching relay drive coil is connect after the collector of the negative pole of described diode D10, the collector of described triode V13, described triode V5 is connected with the positive pole of described diode D6, the collector of described triode V9 connects one end of described resistance R11, the other end of described resistance R11 is connected with one end of described resistance R7 and their tie point connects the base stage of described triode V5, and the emitter of described triode V5, the other end of described resistance R7 are connected with the negative pole of described diode D6 and their tie point connects the output terminal of described full-bridge rectifier,
One end of described resistance R16 is connected with one end of described resistance R20 and their tie point connects the base stage of described triode V8, 94 pins of ATT7035AU described in another termination of described resistance R16, the other end of described resistance R20 connects 95 pins of described ATT7035AU simultaneously, the emitter of described triode V8 and one end of described resistance R24, the other end of described resistance R24 connects the base stage of described triode V12 and one end of described resistance R28 simultaneously, the other end of described resistance R28, the emitter of described triode V12 is connected rear common ground with the positive pole of described diode D11, the other end of described magnetic latching relay drive coil is connect after the collector of the negative pole of described diode D11, the collector of described triode V12, described triode V4 is connected with the positive pole of described diode D7, the collector of described triode V8 connects one end of described resistance R12, after one end of the other end of described resistance R12, described resistance R8 connects, their tie point connects the base stage of described triode V4, and the emitter of described triode V4, the other end of described resistance R8 are connected with the negative pole of described diode D7 afterwards and their tie point connects the output terminal of described full-bridge rectifier.
Above-mentioned control relay circuit forms relay and drives and interlock protection.In control relay circuit, L line relay drive principle is identical with N line relay drive principle, for L line relay drive principle: triode V4, V5, V12, V13 are formed H bridge and control magnetic latching relay drive coil polarity of voltage and direction of current.When 94 pin of described chip ATT7035AU, 95 pin export digital logic high levels or export digital logic low signal simultaneously simultaneously, magnetic latching relay drive coil two ends reference voltage is close to zero, do not have electric current to flow through from magnetic latching relay drive coil, magnetic latching relay is failure to actuate; When 94 pin of described chip ATT7035AU export digital logic low levels, 95 pin of described chip ATT7035AU export digital logic high levels, and hold time at more than 120ms, there are forward voltage and forward current in JDQ1A, JDQ1B two ends of magnetic latching relay drive coil during this period, and magnetic latching relay trip operation can occur; When 94 pin of described chip ATT7035AU export digital logic high levels, 95 pin of described chip ATT7035AU export digital logic low levels, and hold time at more than 120ms, there are reverse voltage and inverse current in JDQ1A, JDQ1B two ends of magnetic latching relay drive coil during this period, and magnetic latching relay feed motion can occur.
embodiment 3:
On the basis of embodiment 1,2, also comprise communicating circuit, described communicating circuit is magnetic adsorption type infrared communication circuit, shown in Figure 7, described magnetic adsorption type infrared communication circuit comprises receiving circuit and radiating circuit, described receiving circuit comprises resistance R31, R36, R38, R40 and triode V16 and infrared receiving tube D14, and described radiating circuit comprises resistance R32, R37, R39 and triode V17 and infrared transmitting tube D15.
One end of the negative pole of described infrared receiving tube D14, described resistance R31 connects and their tie point connects the Vout pin of described voltage adjuster XC6214P332PR, the positive pole of described infrared receiving tube D14, one end of described resistance R38 are connected with one end of described resistance R36, the base stage of triode V16 described in another termination of described resistance R36, the collector of described triode V16, the other end of described resistance R31 are connected with 29 pins of described chip ATT7035AU; One end of resistance R40 described in another termination of described resistance R38, the emitter of described triode V16 is connected rear common ground with the other end of described resistance R40; 30 pins of ATT7035AU described in one termination of described resistance R37, the base stage of described triode V17 is connect after the other end is in parallel with one end of described resistance R32, the Vout pin of described voltage adjuster XC6214P332PR is jointly connect after the other end of described resistance R32 is connected with the emitter of described triode V17, the emitter of described triode V17 is connected with the positive pole of described infrared transmitting tube D15 by described resistance R39, the minus earth of described infrared transmitting tube D15.
embodiment 4:
On the basis of above-described embodiment, also comprise keyboard circuit, shown in Figure 8, described keyboard circuit comprises resistance R61, R62, R63, R65, R66, R69, R72, R73, R74, R75, electric capacity C43, C44, C45, C46, C47, C48, C49 and carbon Key Pad KEY1, KEY2, KEY3, KEY4, KEY5, KEY6, KEY7 and chip XHC3-7A.
1 pin of described chip XHC3-7A passes through one end of described resistance R65 and described resistance R61, described carbon Key Pad KEY1 is jointly met after one end connection of described electric capacity C43,2 pins of described chip XHC3-7A pass through one end of described resistance R66 and described resistance R62, described carbon Key Pad KEY2 is jointly met after one end connection of described electric capacity C44, described carbon Key Pad KEY3 is jointly met after 3 pins of described chip XHC3-7A are connected with one end of described resistance R63 and one end of described electric capacity C45 by described resistance R69, described carbon Key Pad KEY4 is jointly met after 4 pins of described chip XHC3-7A are connected with one end of described electric capacity C46 by described resistance R72, described carbon Key Pad KEY5 is jointly met after 5 pins of described chip XHC3-7A are connected with one end of described electric capacity C47 by described resistance R73, described carbon Key Pad KEY6 is jointly met after 6 pins of described chip XHC3-7A are connected with one end of described electric capacity C48 by described resistance R74, described carbon Key Pad KEY7 is jointly met after 7 pins of described chip XHC3-7A are connected with one end of described electric capacity C49 by described resistance R75, the other end of described resistance R61, the other end of described resistance R62 connect the Vout pin of described voltage adjuster XC6214P332PR jointly after being connected with the other end of described resistance R63, common ground after the other end of described C43, the other end of described C44, the other end of described C45, the other end of described C46, the other end of described C47, the other end of described C48 are connected with the other end of described C49.
embodiment 5:
On the basis of above-described embodiment, also comprise alternating current sampling circuit, shown in Figure 9, described alternating current sampling circuit comprises current sampling circuit and voltage sampling circuit, described current sampling circuit comprises resistance R42, R43, R44, R45, R46, R47, R48, R49, R50, R51, electric capacity C19, C20; Described voltage sampling circuit comprises resistance R52, R53, R56, R58, R59, R60, R88, R89, R90, electric capacity C22, C23, C31, C33.
One end ground connection after described resistance R50 is in parallel with described electric capacity C19,8 pins of ATT7035AU described in another termination, connect N line by described resistance R42, R43, R44, R45, R46, R47, R48, R49 simultaneously, one end ground connection after described resistance R51 is in parallel with described electric capacity C20,9 pins of ATT7035AU described in another termination.
One end of described resistance R56 is connected with one end of described resistance R58 and their the link connecting to neutral line current sampling end of the second current transformer of sampling, the other end of described resistance R58 is connected rear ground connection with one end of described resistance R59, the other end of described resistance R59 is connected with one end of described resistance R60 and their the link connecting to neutral line current reference edge of the second current transformer of sampling, 11 pins of described chip ATT7035AU are connect after the other end of described resistance R60 and one end link of described electric capacity C33, the other end of described electric capacity C33 is connected rear ground connection with one end of described electric capacity C31, 10 pins of described chip ATT7035AU are connect after the other end of described electric capacity C31 is connected with the other end of described resistance R56.
One end of described resistance R52 is connected with one end of described resistance R88 and their link connects the sampling end of the first current transformer that one end of described resistance R89 and neutral line current are sampled simultaneously, the other end of described resistance R88 is connected rear ground connection with one end of described resistance R90, the other end of described resistance R90 is connected with one end of described resistance R53 and their link connects the reference edge of the first current transformer that the other end of described resistance R89 and neutral line current are sampled simultaneously, the other end of described resistance R53 is connected 13 pins of chip ATT7035AU described in termination with one end of described electric capacity C23, the other end of described electric capacity C23 is connected rear ground connection with one end of described electric capacity C22, 12 pins of described ATT7035AU are connect after the other end of described electric capacity C22 is connected with the other end of described resistance R52.
embodiment 6:
On the basis of above-described embodiment, also comprise strong magnetic sensor circuit, shown in Figure 10, described strong magnetic sensor circuit comprises chip PT3661, electric capacity C39, C41, resistance R64, the OUT pin of described chip PT3661, 86 pins of described chip ATT7035AU are jointly connect after one end of described resistance R64 is connected with one end of described electric capacity C41, the other end of described resistance R64, the Vout pin of described voltage adjuster XC6214P332PR is jointly connect after one end of described electric capacity C39 is connected with the VDD pin of described chip PT3661, the other end of described electric capacity C39, the other end of described electric capacity C41 is connected rear common ground with the GND pin of described chip PT3661.
embodiment 7:
On the basis of above-described embodiment, also comprise table cover and end button cover open detection circuit, shown in Figure 11, described table cover and end button cover open detection circuit comprise resistance R70, R71, electric capacity C40, C42, button S1, S2; Common ground after one end of described resistance R70, one end of described electric capacity C40 are connected with one end of described electric capacity C42, the other end of described resistance R70, the other end of described electric capacity C40 connect 4 pins of described ATT7035AU jointly after being connected with 2 pins of described button S1, the other end of described resistance R71, the other end of described electric capacity C42 connect 5 pins of described ATT7035AU jointly after being connected with 2 pins of described button S2, jointly connect 92 pins of described ATT7035AU after 1 pin of described button S1 is connected with 1 pin of described button S2.
embodiment 8:
On the basis of above-described embodiment, also comprise backlight screen control circuit, shown in Figure 12, described backlight screen control circuit comprises triode V19, V20, V21, resistance R77, R78, R79, R83, R84, R85, electric capacity C50, C51, C52, C53, light emitting diode D0, D18, D19, D20.
The Vout pin of voltage adjuster XC6214P332PR described in one termination of described resistance R83, the other end of described resistance R83 connects the positive pole of described light emitting diode D19 and one end of described electric capacity C51 simultaneously, connects 56 pins of described chip ATT7035AU after the negative pole of described light emitting diode D19 is connected with the other end of described electric capacity C51, 28 pins of chip ATT7035AU described in one termination of described resistance R78, the base stage of triode V19 described in the other end of described resistance R78, the emitter of described triode V19 connects the Vout pin of described voltage adjuster XC6214P332PR, the collector of described triode V19 connects one end of described resistance R82, the other end of described resistance R82 connects one end of described electric capacity C50 and the positive pole of described light emitting diode D18 simultaneously, and the other end of described electric capacity C50 is connected rear common ground with the negative pole of described light emitting diode D18, 55 pins of chip ATT7035AU described in one termination of described resistance R79, the base stage of triode V21 described in the other end of described resistance R79, the collector of described triode V21 connects one end of described resistance R85, and the other end of described resistance R85 connects one end of described electric capacity C53 and the positive pole of described light emitting diode D20 simultaneously, 54 pins of chip ATT7035AU described in one termination of described resistance R77, the base stage of triode V20 described in the other end of described resistance R77, the Vout pin of described voltage adjuster XC6214P332PR is connect after the emitter of described triode V20 is connected with the emitter of described triode V21, the collector of described triode V20 connects one end of described resistance R84, the other end of described resistance R84 connects one end of described electric capacity C52 and the positive pole of described light emitting diode D0 simultaneously, the other end of described electric capacity C52, the negative pole of described light emitting diode D0, the other end of described electric capacity C53 is connected rear common ground with the negative pole of described light emitting diode D20.
embodiment 9:
On the basis of above-described embodiment, also comprise buzzer alarm circuit, shown in Figure 13, described buzzer alarm circuit comprises resistance R80, R81, R86, electric capacity C54, diode D17, triode V22, hummer M1, 22 pins of ATT7035AU described in one termination of described resistance R86, the other end of described resistance R86, the base stage of described triode V22 is connect after one end connection of described electric capacity C54, the other end of described electric capacity C54 is connected rear common ground with the collector of described triode V22, the emitter of described triode V22 connects the positive pole of described diode D17 and one end of described hummer M1 simultaneously, the negative pole of described diode D17, the other end of described hummer M1 is connected with one end of described resistance R81 with one end of described resistance R80, the Vout pin of described voltage adjuster XC6214P332PR is jointly connect after the other end of described resistance R80 is connected with the other end of described resistance R81.
embodiment 10:
On the basis of above-described embodiment, also comprise meritorious impulse output circuit, shown in Figure 14, described meritorious impulse output circuit comprises the first photoelectrical coupler TLP785, resistance R67, R68, R76, triode V18, diode D21, light emitting diode D16, electric capacity C38; 33 pins of ATT7035AU described in one termination of described resistance R76, the base stage of triode V18 described in another termination of described resistance R76, the grounded emitter of described triode V18, the collector of described triode V18 connects one end of described resistance R67 and one end of described resistance R68 simultaneously, an input end of the first photoelectrical coupler TLP785 described in another termination of described resistance R68, the other end of described resistance R67 connects one end of described electric capacity C38 and the negative pole of described light emitting diode D16 simultaneously, the other end of described electric capacity C38, the Vout pin of described voltage adjuster XC6214P332PR is jointly connect after the positive pole of described light emitting diode D16 is connected with another input end of described first photoelectrical coupler TLP785, jointly connect auxiliary terminal pulse of gaining merit after the output terminal of described first photoelectrical coupler TLP785 is connected with described diode D21 negative pole and export sampling end, jointly connect auxiliary terminal pulse of gaining merit after another output terminal of described first photoelectrical coupler TLP785 is connected with described diode D1 positive pole and export reference edge.
embodiment 11:
On the basis of above-described embodiment, also comprise a second merit impulse output circuit, shown in Figure 15, described second, merit impulse output circuit comprised the second photoelectrical coupler TLP785, resistance R91, R54, triode V23, diode D22, 21 pins of ATT7035AU described in one termination of described resistance R91, the base stage of triode V23 described in another termination, the grounded emitter of described triode V23, the collector of described triode V23 connects one end of described resistance R54, an input end of the second photoelectrical coupler TLP785 described in another termination of described resistance R54, the Vout pin of voltage adjuster XC6214P332PR described in another input termination of described second photoelectrical coupler TLP785, jointly connect auxiliary terminal pulse per second (PPS) after the output terminal of described second photoelectrical coupler TLP785 is connected with described diode D22 negative pole and export sampling end, jointly connect auxiliary terminal pulse per second (PPS) after another output terminal of described second photoelectrical coupler TLP785 is connected with described diode D22 positive pole and export reference edge.
embodiment 12:
On the basis of above-described embodiment, also comprise data storage circuitry, shown in Figure 16, described data storage circuitry comprises storage chip BR24G128FJ-WE2, electric capacity C15, resistance R34, R35, one end of described electric capacity C15, 8 pins of described storage chip BR24G128FJ-WE2, 92 pins of described ATT7035AU are jointly connect after one end of described resistance R34 is connected with one end of described resistance R35, 1 pin of described ATT7035AU is jointly connect after 6 pins of described storage chip BR24G128FJ-WE2 are connected with the other end of described resistance R34, 2 pins of described ATT7035AU are jointly connect after 5 pins of described storage chip BR24G128FJ-WE2 are connected with the other end of described resistance R35, the other end of described electric capacity C15 and 1 pin of described storage chip BR24G128FJ-WE2, 2 pins, 3 pins, 4 pins, common ground after 7 pins connect.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (11)
1. an electronic single-phase keyboard prepayment meter, is characterized in that, comprises SOC interface circuit, power circuit and power-fail detection circuit, wherein,
Power circuit, comprising one externally provides galvanic output terminal;
SOC interface circuit, comprises a control end, and when described control end receives connection signal, described SOC interface circuit normally runs; When described control end receives look-at-me, described SOC interface circuit performs power failure data and preserves action;
Power-fail detection circuit, comprise an input end and an output terminal, the input end of described power-fail detection circuit is connected with the output terminal of described power circuit, for receiving the direct current that described power circuit provides; The output terminal of described power-fail detection circuit is connected with the control end of described SOC interface circuit; Described power-fail detection circuit is used for the direct current that the described power circuit of detection in real time provides, and testing result is sent to the control end of described SOC interface circuit; When described power-fail detection circuit detects that described direct current is greater than or equal to predetermined voltage threshold, described power-fail detection circuit exports connection signal to described SOC interface circuit; When described power-fail detection circuit detects that described direct current is less than described predetermined voltage threshold, described power-fail detection circuit exports look-at-me to described SOC interface circuit.
2. electronic single-phase keyboard prepayment meter according to claim 1, is characterized in that, described SOC interface circuit comprises system level chip ATT7035AU and peripheral circuit thereof.
3. electronic single-phase keyboard prepayment meter according to claim 2, is characterized in that, described power circuit comprises for externally providing galvanic AC/DC power-switching circuit and for providing the system works power circuit of the working power of system; Described AC/DC power-switching circuit comprises voltage dependent resistor (VDR) RV1, transformer TC1, diode D23, D24, D25, D26, and described diode D23, D24, D25, D26 form full-bridge rectifier; Described system works power circuit comprises electric capacity C2, C4, C7, C8, C9, polar capacitor C1, C3, power supply voltage stabilizing chip 7805, voltage adjuster XC6214P332PR; Alternating current connects the primary coil of described transformer TC1 by described voltage dependent resistor (VDR) RV1, the secondary coil of described transformer TC1 connects the input end of described full-bridge rectifier, and the output terminal of described full-bridge rectifier provides input signal as the output terminal of described AC/DC power-switching circuit to described power-fail detection circuit; The output terminal of described full-bridge rectifier, the positive pole of described polar capacitor C1 connect the IN pin of described power supply voltage stabilizing chip 7805 jointly after being connected with one end of described electric capacity C2, the negative pole of described polar capacitor C1 is connected rear common ground with the other end of described electric capacity C2; Connect the OUT pin of described power supply voltage stabilizing chip 7805 and the Vin pin of described voltage adjuster XC6214P332PR after one end connection of the positive pole of described polar capacitor C3, described electric capacity C4, C9, the negative pole of described polar capacitor C3 is connected rear common ground with the other end of described electric capacity C4, C9 simultaneously; The GND pin ground connection of described voltage adjuster XC6214P332PR and described power supply voltage stabilizing chip 7 805, one end ground connection after described electric capacity C7, C8 parallel connection, the Vout pin of voltage adjuster XC6214P332PR described in another termination.
4. electronic single-phase keyboard prepayment meter according to claim 3, is characterized in that, described power-fail detection circuit comprises resistance R2, R3, R4, R6, electric capacity C6, triode V1, V3; One end of described resistance R4 as described power-fail detection circuit input termination described in the output terminal of full-bridge rectifier, the other end of described resistance R4, one end of described resistance R6 are connected with one end of described electric capacity C6 and their tie point connects the base stage of described triode V3, common ground after the emitter of described triode V3, the other end of described resistance R6 are connected with the other end of described electric capacity C6; The collector of described triode V3, one end of described resistance R3 are connected with the base stage of described triode V1, and the other end of described resistance R3 is connected with one end of described resistance R2 and their tie point connects the Vout pin of described voltage adjuster XC6214P332PR; The other end of described resistance R2 is connected with one end of the collector of described triode V1 and described electric capacity C5, and their tie point connects 3 pins of described ATT7035AU; The emitter of described triode V1 is connected rear common ground with the other end of described electric capacity C5.
5. electronic single-phase keyboard prepayment meter according to claim 4, is characterized in that, also comprise control relay circuit, and described control relay circuit comprises L phase relay control circuit and N phase relay control circuit; Described L phase relay control circuit is identical with described N phase relay control circuit structure, wherein, described L phase relay control circuit and described N phase relay control circuit include triode V4, V5, V8, V9, V12, V13, resistance R7, R8, R11, R12, R15, R16, R19, R20, R23, R24, R27, R28 and diode D6, D7, D10, D11 and magnetic latching relay;
One end of described resistance R15 is connected with one end of described resistance R19 and their tie point connects the base stage of described triode V9, 95 pins of ATT7035AU described in another termination of described resistance R15, the other end of described resistance R19 connects 94 pins of described ATT7035AU simultaneously, the emitter of described triode V9 and one end of described resistance R23, the other end of described resistance R23 connects the base stage of described triode V13 and one end of described resistance R27 simultaneously, the other end of described resistance R27, the emitter of described triode V13 is connected rear common ground with the positive pole of described diode D10, one end of described magnetic latching relay drive coil is connect after the collector of the negative pole of described diode D10, the collector of described triode V13, described triode V5 is connected with the positive pole of described diode D6, the collector of described triode V9 connects one end of described resistance R11, the other end of described resistance R11 is connected with one end of described resistance R7 and their tie point connects the base stage of described triode V5, and the emitter of described triode V5, the other end of described resistance R7 are connected with the negative pole of described diode D6 and their tie point connects the output terminal of described full-bridge rectifier,
One end of described resistance R16 is connected with one end of described resistance R20 and their tie point connects the base stage of described triode V8, 94 pins of ATT7035AU described in another termination of described resistance R16, the other end of described resistance R20 connects 95 pins of described ATT7035AU simultaneously, the emitter of described triode V8 and one end of described resistance R24, the other end of described resistance R24 connects the base stage of described triode V12 and one end of described resistance R28 simultaneously, the other end of described resistance R28, the emitter of described triode V12 is connected rear common ground with the positive pole of described diode D11, the other end of described magnetic latching relay drive coil is connect after the collector of the negative pole of described diode D11, the collector of described triode V12, described triode V4 is connected with the positive pole of described diode D7, the collector of described triode V8 connects one end of described resistance R12, after one end of the other end of described resistance R12, described resistance R8 connects, their tie point connects the base stage of described triode V4, and the emitter of described triode V4, the other end of described resistance R8 are connected with the negative pole of described diode D7 afterwards and their tie point connects the output terminal of described full-bridge rectifier.
6. according to the arbitrary described electronic single-phase keyboard prepayment meter of claim 3-5, it is characterized in that, described power circuit also comprises the system power supply commutation circuit of the standby power supply providing system works, and described system power supply commutation circuit comprises electric capacity C11 and polar capacitor C10 and standby power supply; The positive pole of described polar capacitor C10 is connected with one end of electric capacity C11 and their tie point connects 90 pins of described ATT7035AU and described standby power supply positive pole, and the negative pole of described polar capacitor C10 is connected rear common ground with the other end of electric capacity C11; The negative pole of described standby power supply is by J2 and JP-2 ground connection.
7. electronic single-phase keyboard prepayment meter according to claim 6, it is characterized in that, also comprise communicating circuit, described communicating circuit is magnetic adsorption type infrared communication circuit, described magnetic adsorption type infrared communication circuit comprises receiving circuit and radiating circuit, described receiving circuit comprises resistance R31, R36, R38, R40 and triode V16 and infrared receiving tube D14, and described radiating circuit comprises resistance R32, R37, R39 and triode V17 and infrared transmitting tube D15;
One end of the negative pole of described infrared receiving tube D14, described resistance R31 connects and their tie point connects the Vout pin of described voltage adjuster XC6214P332PR, the positive pole of described infrared receiving tube D14, one end of described resistance R38 are connected with one end of described resistance R36, the base stage of triode V16 described in another termination of described resistance R36, collector, the other end of described resistance R31 of described triode V16 are connected with 29 pins of described ATT7035AU; One end of resistance R40 described in another termination of described resistance R38, the emitter of described triode V16 is connected rear common ground with the other end of described resistance R40;
30 pins of ATT7035AU described in one termination of described resistance R37, the base stage of described triode V17 is connect after the other end is in parallel with one end of described resistance R32, the Vout pin of described voltage adjuster XC6214P332PR is jointly connect after the other end of described resistance R32 is connected with the emitter of described triode V17, the emitter of described triode V17 is connected with the positive pole of described infrared transmitting tube D15 by described resistance R39, the minus earth of described infrared transmitting tube D15.
8. electronic single-phase keyboard prepayment meter according to claim 7, it is characterized in that, also comprise keyboard circuit, described keyboard circuit comprises resistance R61, R62, R63, R65, R66, R69, R72, R73, R74, R75, electric capacity C43, C44, C45, C46, C47, C48, C49 and carbon Key Pad KEY1, KEY2, KEY3, KEY4, KEY5, KEY6, KEY7 and chip XHC3-7A;
1 pin of described chip XHC3-7A passes through one end of described resistance R65 and described resistance R61, described carbon Key Pad KEY1 is jointly met after one end connection of described electric capacity C43,2 pins of described chip XHC3-7A pass through one end of described resistance R66 and described resistance R62, described carbon Key Pad KEY2 is jointly met after one end connection of described electric capacity C44, described carbon Key Pad KEY3 is jointly met after 3 pins of described chip XHC3-7A are connected with one end of described resistance R63 and one end of described electric capacity C45 by described resistance R69, described carbon Key Pad KEY4 is jointly met after 4 pins of described chip XHC3-7A are connected with one end of described electric capacity C46 by described resistance R72, described carbon Key Pad KEY5 is jointly met after 5 pins of described chip XHC3-7A are connected with one end of described electric capacity C47 by described resistance R73, described carbon Key Pad KEY6 is jointly met after 6 pins of described chip XHC3-7A are connected with one end of described electric capacity C48 by described resistance R74, described carbon Key Pad KEY7 is jointly met after 7 pins of described chip XHC3-7A are connected with one end of described electric capacity C49 by described resistance R75, the other end of described resistance R61, the other end of described resistance R62 connect the Vout pin of described voltage adjuster XC6214P332PR jointly after being connected with the other end of described resistance R63, common ground after the other end of described C43, the other end of described C44, the other end of described C45, the other end of described C46, the other end of described C47, the other end of described C48 are connected with the other end of described C49.
9. electronic single-phase keyboard prepayment meter according to claim 8, it is characterized in that, also comprise alternating current sampling circuit, described alternating current sampling circuit comprises current sampling circuit and voltage sampling circuit, described current sampling circuit comprises resistance R42, R43, R44, R45, R46, R47, R48, R49, R50, R51, electric capacity C19, C20; Described voltage sampling circuit comprises resistance R52, R53, R56, R58, R59, R60, R88, R89, R90, electric capacity C22, C23, C31, C33;
One end ground connection after described resistance R50 is in parallel with described electric capacity C19,8 pins of ATT7035AU described in another termination, connect N line by described resistance R42, R43, R44, R45, R46, R47, R48, R49 simultaneously, one end ground connection after described resistance R51 is in parallel with described electric capacity C20,9 pins of ATT7035AU described in another termination;
One end of described resistance R56 is connected with one end of described resistance R58 and their the link connecting to neutral line current sampling end of the second current transformer of sampling, the other end of described resistance R58 is connected rear ground connection with one end of described resistance R59, the other end of described resistance R59 is connected with one end of described resistance R60 and their the link connecting to neutral line current reference edge of the second current transformer of sampling, 11 pins of described chip ATT7035AU are connect after the other end of described resistance R60 and one end link of described electric capacity C33, the other end of described electric capacity C33 is connected rear ground connection with one end of described electric capacity C31, 10 pins of described chip ATT7035AU are connect after the other end of described electric capacity C31 is connected with the other end of described resistance R56,
One end of described resistance R52 is connected with one end of described resistance R88 and their link connects the sampling end of the first current transformer that one end of described resistance R89 and neutral line current are sampled simultaneously, the other end of described resistance R88 is connected rear ground connection with one end of described resistance R90, the other end of described resistance R90 is connected with one end of described resistance R53 and their link connects the reference edge of the first current transformer that the other end of described resistance R89 and neutral line current are sampled simultaneously, the other end of described resistance R53 is connected 13 pins of chip ATT7035AU described in termination with one end of described electric capacity C23, the other end of described electric capacity C23 is connected rear ground connection with one end of described electric capacity C22, 12 pins of described ATT7035AU are connect after the other end of described electric capacity C22 is connected with the other end of described resistance R52.
10. electronic single-phase keyboard prepayment meter according to claim 9, it is characterized in that, also comprise strong magnetic sensor circuit, backlight screen control circuit, buzzer alarm circuit, table cover and end button cover open detection circuit, meritorious impulse output circuit and second merit impulse output circuit;
Described strong magnetic sensor circuit comprises chip PT3661, electric capacity C39, C41, resistance R64, the OUT pin of described chip PT3661, one end of described resistance R64 connect 86 pins of described ATT7035AU jointly after being connected with one end of described electric capacity C41, the other end of described resistance R64, one end of described electric capacity C39 connect the Vout pin of described voltage adjuster XC6214P332PR jointly after being connected with the VDD pin of described chip PT3661, common ground after the other end of described electric capacity C39, the other end of described electric capacity C41 are connected with the GND pin of described chip PT3661;
Described backlight screen control circuit comprises triode V19, V20, V21, resistance R77, R78, R79, R83, R84, R85, electric capacity C50, C51, C52, C53, light emitting diode D0, D18, D19, D20, the Vout pin of voltage adjuster XC6214P332PR described in one termination of described resistance R83, the other end of described resistance R83 connects the positive pole of described light emitting diode D19 and one end of described electric capacity C51 simultaneously, jointly connects 56 pins of described ATT7035AU after the negative pole of described light emitting diode D19 is connected with the other end of described electric capacity C51, 28 pins of ATT7035AU described in one termination of described resistance R78, the base stage of triode V19 described in the other end of described resistance R78, the emitter of described triode V19 connects the Vout pin of described voltage adjuster XC6214P332PR, the collector of described triode V19 connects one end of described resistance R82, the other end of described resistance R82 connects one end of described electric capacity C50 and the positive pole of described light emitting diode D18 simultaneously, and the other end of described electric capacity C50 is connected rear common ground with the negative pole of described light emitting diode D18, 55 pins of ATT7035AU described in one termination of described resistance R79, the base stage of triode V21 described in the other end of described resistance R79, the collector of described triode V21 connects one end of described resistance R85, and the other end of described resistance R85 connects the positive pole of one end of described electric capacity C53, described light emitting diode D20 simultaneously, 54 pins of ATT7035AU described in one termination of described resistance R77, the base stage of triode V20 described in the other end of described resistance R77, the Vout pin of described voltage adjuster XC6214P332PR is connect after the emitter of described triode V20 is connected with the emitter of described triode V21, the collector of described triode V20 connects one end of described resistance R84, the other end of described resistance R84 connects one end of described electric capacity C52 and the positive pole of described light emitting diode D0 simultaneously, the other end of described electric capacity C52, the negative pole of described light emitting diode D0, the other end of described electric capacity C53 is connected rear common ground with the negative pole of described light emitting diode D20,
Described buzzer alarm circuit comprises resistance R80, R81, R86, electric capacity C54, diode D17, triode V22, hummer M1, 22 pins of ATT7035AU described in one termination of described resistance R86, the other end of described resistance R86, the base stage of described triode V22 is connect after one end connection of described electric capacity C54, the other end of described electric capacity C54 is connected rear common ground with the collector of described triode V22, the emitter of described triode V22 connects the positive pole of described diode D17 and one end of described hummer M1 simultaneously, the negative pole of described diode D17, the other end of described hummer M1 is connected with one end of described resistance R81 with one end of described resistance R80, the Vout pin of described voltage adjuster XC6214P332PR is jointly connect after the other end of described resistance R80 is connected with the other end of described resistance R81,
Described table cover and end button cover open detection circuit comprise resistance R70, R71, electric capacity C40, C42, button S1, S2; One end of one end of described resistance R70, one end of described resistance R70, described electric capacity C40 is connected rear common ground with one end of described electric capacity C42, the other end of described resistance R70, the other end of described electric capacity C40 connect 4 pins of described ATT7035AU jointly after being connected with 2 pins of described button S1, the other end of described resistance R71, the other end of described electric capacity C42 connect 5 pins of described ATT7035AU jointly after being connected with 2 pins of described button S2, jointly connect 92 pins of described ATT7035AU after 1 pin of described button S1 is connected with 1 pin of described button S2;
Described meritorious impulse output circuit comprises the first photoelectrical coupler TLP785, resistance R67, R68, R76, triode V18, diode D21, light emitting diode D16, electric capacity C38; 33 pins of ATT7035AU described in one termination of described resistance R76, the base stage of triode V18 described in another termination of described resistance R76, the grounded emitter of described triode V18, the collector of described triode V18 connects one end of described resistance R67 and one end of described resistance R68 simultaneously, an input end of the first photoelectrical coupler TLP785 described in another termination of described resistance R68, the other end of described resistance R67 connects one end of described electric capacity C38 and the negative pole of described light emitting diode D16 simultaneously, the other end of described electric capacity C38, the Vout pin of described voltage adjuster XC6214P332PR is jointly connect after the positive pole of described light emitting diode D16 is connected with another input end of described first photoelectrical coupler TLP785, jointly connect auxiliary terminal pulse of gaining merit after the output terminal of described first photoelectrical coupler TLP785 is connected with described diode D21 negative pole and export sampling end, jointly connect auxiliary terminal pulse of gaining merit after another output terminal of described first photoelectrical coupler TLP785 is connected with described diode D1 positive pole and export reference edge,
Described second, merit impulse output circuit comprised the second photoelectrical coupler TLP785, resistance R91, R54, triode V23, diode D22, 21 pins of ATT7035AU described in one termination of described resistance R91, the base stage of triode V23 described in another termination, the grounded emitter of described triode V23, the collector of described triode V23 connects one end of described resistance R54, an input end of the second photoelectrical coupler TLP785 described in another termination of described resistance R54, the Vout pin of voltage adjuster XC6214P332PR described in another input termination of described second photoelectrical coupler TLP785, jointly connect auxiliary terminal pulse per second (PPS) after the output terminal of described second photoelectrical coupler TLP785 is connected with described diode D22 negative pole and export sampling end, jointly connect auxiliary terminal pulse per second (PPS) after another output terminal of described second photoelectrical coupler TLP785 is connected with described diode D22 positive pole and export reference edge.
11. electronic single-phase keyboard prepayment meters according to claim 10, it is characterized in that, also comprise data storage circuitry, described data storage circuitry comprises storage chip BR24G128FJ-WE2, electric capacity C15, resistance R34, R35, one end of described electric capacity C15, 8 pins of described storage chip BR24G128FJ-WE2, 92 pins of described chip ATT7035AU are jointly connect after one end of described resistance R34 is connected with one end of described resistance R35, 1 pin of described ATT7035AU is jointly connect after 6 pins of described storage chip BR24G128FJ-WE2 are connected with the other end of described resistance R34, 2 pins of described ATT7035AU are jointly connect after 5 pins of described storage chip BR24G128FJ-WE2 are connected with the other end of described resistance R35, the other end of described electric capacity C15 and 1 pin of described storage chip BR24G128FJ-WE2, 2 pins, 3 pins, 4 pins, common ground after 7 pins connect.
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Address after: Zhengtai Instrument Measurement Industrial Park, No.1 Liangce Road, Beibaixiang Town, Leqing City, Wenzhou City, Zhejiang Province, 325603 Patentee after: ZHEJIANG CHINT INSTRUMENT & METER Co.,Ltd. Address before: 325603 Wenzhou Daqiao Industrial Park, Yueqing City, Wenzhou City, Zhejiang Province Patentee before: ZHEJIANG CHINT INSTRUMENT & METER Co.,Ltd. |