CN102170153B - Device and method for supplying power for batteries of handheld second-generation ID card reader - Google Patents
Device and method for supplying power for batteries of handheld second-generation ID card reader Download PDFInfo
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- CN102170153B CN102170153B CN 201110083851 CN201110083851A CN102170153B CN 102170153 B CN102170153 B CN 102170153B CN 201110083851 CN201110083851 CN 201110083851 CN 201110083851 A CN201110083851 A CN 201110083851A CN 102170153 B CN102170153 B CN 102170153B
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Abstract
The invention discloses a device and method for supplying power for batteries of a handheld second-generation ID card reader. The device comprises an MCU (main control unit), a charging module A, a battery A, a voltage-reducing unit, a charging module B, a battery B, a voltage-boosting unit, a card-reading circuit and an electronic switch, wherein an input end of the charging module A and an input end of the charging module B are connected with an external power supply; an output end of the charging module A and an output end of the charging module B are respectively connected with battery charging terminals of the battery A and the battery B; an output end of the battery A is connected with the voltage-reducing unit; an output end of the voltage-reducing unit is connected with the MCU; an output end of the MCU is connected with a control end of the electronic switch; an output end of the battery B is connected with the voltage-boosting unit by the electronic switch; and an output end of the voltage-boosting unit is connected with the card-reading circuit. According to the invention, by utilizing the characteristic of interrupted work of the card-reading circuit, when the reader reads the card, the device supplies the power for the batteries, thus effectively reducing power consumption. In addition, the device has the advantages of long standby time, stable and reliable circuit work and the like.
Description
Technical field
The present invention relates to a kind of supply unit, particularly relate to a kind of supplying power for batteries of handheld second-generation ID card reader device and method.
Background technology
The China second-generation identity card card reader is a kind of equipment that can judge whether identity card is forged, as cash inspecting machine, can effectively identify the identity card true and false, Certification of Second Generation contains the RFID chip, by the China second-generation identity card card reader, and stored information in the identity card chip, comprise name, address, the information such as photo will show one by one, Certification of Second Generation chip employing smart card techniques, its chip can't copy, highly false proof, cooperate the China second-generation identity card card reader, false identity card will be had no place to hide.Can read, inquire about the No.2 residence card full detail, can verify the No.2 residence card true and false.
Along with the deep development of second-generation identity card reader in social all departments, more and more higher to the demand of the hand-held identity card reader of mobile convenient and small volume.The small volume of hand-held identity card reader so its used battery is just less, has affected the size of battery capacity like this, has affected the lasting service time of battery.
Generally speaking, power consumption is all very large when the security module that card reader of ID card uses and card reading circuit work, this will affect work duration and the job stability of whole system, the card reader of ID card Card Reader time only needed for 2 seconds, and the processing time of ID card information and business handling time need 30 seconds-120 seconds, all in the free time, wasted the electric energy in the battery at these time security modules and card reading circuit meaninglessly.
The power supply of card reader of ID card normal operation monocell, but the security module starup current is very large, immediate current can reach 300mA, as shown in Figure 1, cell voltage can descend moment in the process of security module start, produce the spike of a decline, system power supply is had a huge impact, even may cause system in case of system halt.
Summary of the invention
Purpose of the present invention namely is to overcome the deficiencies in the prior art, and a kind of supplying power for batteries of handheld second-generation ID card reader device and method is provided, in order to rationally use battery power, reaches the purpose that stand-by time is long, system works is stable.
The objective of the invention is to be achieved through the following technical solutions: the supplying power for batteries of handheld second-generation ID card reader device, it comprises battery component A, battery component B, main control unit, electronic switch and card reading circuit, battery component A provides working power for main control unit, battery component B provides working power for card reading circuit, wherein, described battery component A comprises charging module A, battery A and pressure unit, described battery component B comprises charging module B, battery B and boosting unit, charging module A is connected input and is connected external power source with charging module B, charging module A is connected output and is connected respectively the charging terminal of battery A and battery B with charging module B, the output of battery A connects pressure unit, the output of pressure unit connects main control unit, the control end of the output connecting electronic switch of main control unit, the output of battery B connects boosting unit through electronic switch, and the output of boosting unit is connected with card reading circuit.
Described charging module A of the present invention comprises a charging chip U2 and peripheral cell thereof, and the power input of charging chip U2 connects external power source, and its output is connected to the charging terminal of battery A.
Described pressure unit comprises a step-down chip U15 and peripheral cell thereof, and the voltage input end of step-down chip U15 connects the voltage output end of battery A, and the output of step-down chip U15 connects the voltage input end of main control unit.
Described charging module B comprises a charging chip U5 and peripheral cell thereof, and the power input of charging chip U5 connects external power source, and its output is connected to the charging terminal of battery B.
Described electronic switch comprises a metal-oxide-semiconductor Q11, the source electrode of metal-oxide-semiconductor Q11 is connected to the voltage output end of battery B, the drain electrode of metal-oxide-semiconductor Q11 is connected to the voltage input end that meets the chip U34 that boosts in the boosting unit, the grid of metal-oxide-semiconductor Q11 is connected with the electronic switch control signal of main control unit, the Voltage-output termination card reading circuit of chip U34.
The method of supplying power for batteries of handheld second-generation ID card reader, it comprises following characteristics:
(1) two batteries being set is battery A and battery B, and battery A only is the main control unit power supply, and battery B only is the card reading circuit power supply;
(2) electronic switch is set in the loop between battery B and card reading circuit;
(3) not during Card Reader, battery A is the main control unit power supply always, and main control unit is closed electronic switch, and the card reading circuit dead electricity is not worked, yet not power consumption;
(4) during Card Reader, main control unit is opened electronic switch, and card reading circuit gets electric, carries out the Card Reader operation;
(5) Card Reader finishes, and main control unit is closed electronic switch again, card reading circuit also again dead electricity do not work, repeat (3)～(5).
The present invention utilizes the characteristics of card reading circuit interruption work, is its power supply just when Card Reader, effectively reduces power consumption, and has the advantages such as stand-by time is long, circuit working is reliable and stable.
Description of drawings
The voltage pattern of the security module of Fig. 1 monocell power supply
Fig. 2 structural framing figure of the present invention
The charge-discharge circuit structure chart of Fig. 3 battery component A of the present invention
The circuit structure diagram of Fig. 4 pressure unit of the present invention
The circuit structure diagram of the charging and discharging of Fig. 5 battery component B of the present invention, electronic switch, boosting unit.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further:
As shown in Figure 2, the supplying power for batteries of handheld second-generation ID card reader device, it comprises main control unit, charging module A, battery A, pressure unit, charging module B, battery B, boosting unit, card reading circuit and an electronic switch, charging module A is connected input and is connected external power source with charging module B, charging module A is connected output and is connected respectively the charging terminal of battery A and battery B with charging module B, the output of battery A connects pressure unit, the output of pressure unit connects main control unit, the control end of the output connecting electronic switch of main control unit, the output of battery B connects boosting unit through electronic switch, and the output of boosting unit is connected with card reading circuit.
Such as Fig. 3, charging module A comprises a charging chip U2 and peripheral cell thereof, and the supply voltage input VDD of charging chip U2 connects external power source POW, and external power source is generally 5 volts of direct currents, and electric capacity E19 plays the filtering voltage regulation effect to external power source; From its STAT output charging index signal, light-emitting diode D3 is luminous when charging module A works during charging chip U2 charging, and the output VBAT of charging chip U2 is connected to the charging terminal of battery A, is battery A charging.The model of charging chip U2 is MCP73832T-2ACI/OT.
Such as Fig. 4, the output voltage of battery A enters from the voltage input end of voltage-dropping type DC/DC chip U15, voltage-dropping type DC/DC chip U15 outputs to system from voltage output end with the voltage voltage stabilizing again behind 3.3V, be system power supply, the whole system maximum operating currenbt is at 180mA, running current is at 110mA, standby current is 10mA, battery A is the main road electric power system, what use is the 1100mAH battery, in theory can standby approximately 100 hours, can standby approximately 80-120 hours (relevant according to different batteries and charge condition) in the reality test.Use external power power supply in the external power situation is arranged, in without the external power situation, automatically switch to powered battery.The model of step-down chip U15 is LTC3407-2.
As shown in Figure 5, charging module B comprises a chip U5 and peripheral cell thereof, and the power input VDD of charging chip U5 connects external power source POW, and external power source is generally 5 volts of direct currents, and electric capacity E21 plays the filtering voltage regulation effect to external power source; From its STAT output charging index signal, light-emitting diode D4 is luminous when charging module A works during charging chip U5 charging, and the output VBAT of charging chip U5 is connected to the charging terminal of battery B, is battery A charging.The model of charging chip U5 is MCP73832T-2ACI/OT.
Electronic switch Q11 is a metal-oxide-semiconductor, the source electrode of Q11 is connected to the output of prime, the drain electrode of Q11 is connected to the voltage input end of the chip U34 that boosts in the boosting unit, the grid of Q11 connects the electronic switch control signal end of main control unit, and the voltage output end of the chip U34 that boosts connects card reading circuit or security module.Card reading circuit or security module need the 5V power supply, by step-up DC/DC chip MAX1674 5V are arrived in the cell voltage voltage stabilizing.What battery B used also is the 1100mAH battery, if Card Reader ceaselessly can use 3-4 hour continuously, when reading then 1 minute service computation of transacting business of a secondary card, can handle in theory 4000 business and carry out the battery charging again.Under the situation of switch power supply control, can not exert an influence to the main road battery simultaneously.The model of chip U34 of boosting is MAX1674EUA.
The method of supplying power for batteries of handheld second-generation ID card reader:
(1) two batteries being set is battery A and battery B, and battery A only is the main control unit power supply, and battery B only is the card reading circuit power supply;
(2) electronic switch is set in the loop between battery B and card reading circuit;
(3) not during Card Reader, battery A is the main control unit power supply always, and main control unit is closed electronic switch, and the card reading circuit dead electricity is not worked, yet not power consumption;
(4) during Card Reader, main control unit is opened electronic switch, and card reading circuit gets electric, carries out the Card Reader operation;
(5) Card Reader finishes, and main control unit is closed electronic switch again, card reading circuit also again dead electricity do not work, repeat (3)～(5).
Operation principle of the present invention: battery A by voltage-dropping type chip U15 in the pressure unit with voltage stabilization to 3.3 volts, be the main control unit power supply, it is source electrode and the drain electrode partition of Q11 that main control unit is closed electronic switch, and making battery B can not be security module and card reading circuit power supply; When the needs reading identity card information, it is that source electrode and the drain electrode of Q11 is communicated with that main control unit control electronic switch is opened, at this moment battery B by the booster type chip U34 in the boosting unit with voltage stabilization to 5 volts, be the power supply of card reading circuit and security module; After running through identity document information, main control unit can be controlled again electronic switch and close, and has cut off the power supply of card reading circuit and security module, has saved the electric energy of battery B.
The present invention is when having external power, and system uses the external power power supply, and the at this moment source electrode of metal-oxide-semiconductor Q9 and Q10 and drain electrode cuts off, and battery A and battery B do not power; Without external power the time, the source electrode of metal-oxide-semiconductor Q9 and Q10 and drain electrode are communicated with, and system automatically switches to powered battery.
The A/D that battery A of the present invention and battery B place all are provided with the voltage electric weight detect to judge, with this determine battery electric quantity how much, judge whether and need to report to the police by main control unit.
Claims (1)
1. supplying power for batteries of handheld second-generation ID card reader device, it is characterized in that: it comprises battery component A, battery component B, main control unit, electronic switch and card reading circuit, battery component A provides working power for main control unit, battery component B provides working power for card reading circuit, wherein, described battery component A comprises charging module A, battery A and pressure unit, charging module A comprises a charging chip and peripheral cell thereof, the power input of charging chip connects external power source, its output is connected to the charging terminal of battery A, described battery component B comprises charging module B, battery B and boosting unit, charging module B comprises a charging chip and peripheral cell thereof, the power input of charging chip connects external power source, its output is connected to the charging terminal of battery B, pressure unit comprises a step-down chip and peripheral cell thereof, the voltage input end of step-down chip connects the voltage output end of battery A, the output of step-down chip connects the voltage input end of main control unit, electronic switch comprises a metal-oxide-semiconductor, the source electrode of metal-oxide-semiconductor is connected to the voltage output end of battery B, the drain electrode of metal-oxide-semiconductor is connected to the voltage input end that connects the chip that boosts in the boosting unit, the grid of metal-oxide-semiconductor is connected with the electronic switch control signal of main control unit, the Voltage-output termination card reading circuit of the chip that boosts.
2
.The method of supplying power for batteries of handheld second-generation ID card reader is characterized in that, it may further comprise the steps:
(1) two batteries being set is battery A and battery B, and battery A only is the main control unit power supply, and battery B only is the card reading circuit power supply;
(2) electronic switch is set in the loop between battery B and card reading circuit;
(3) not during Card Reader, battery A is the main control unit power supply always, and main control unit is closed electronic switch, and the card reading circuit dead electricity is not worked, yet not power consumption;
(4) during Card Reader, main control unit is opened electronic switch, and card reading circuit gets electric, carries out the Card Reader operation;
(5) Card Reader finishes, and main control unit is closed electronic switch again, card reading circuit also again dead electricity do not work, repeat (3)～(5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110083851 CN102170153B (en) | 2011-04-02 | 2011-04-02 | Device and method for supplying power for batteries of handheld second-generation ID card reader |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110083851 CN102170153B (en) | 2011-04-02 | 2011-04-02 | Device and method for supplying power for batteries of handheld second-generation ID card reader |
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| CN102170153A CN102170153A (en) | 2011-08-31 |
| CN102170153B true CN102170153B (en) | 2013-02-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102737212B (en) * | 2012-06-06 | 2014-11-19 | 成都因纳伟盛科技股份有限公司 | Handheld checker of second-generation identity card and checking method of handheld checker |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1237283A (en) * | 1997-09-03 | 1999-12-01 | 摩托罗拉半导体公司 | Portable electronic device and method |
| CN101364745A (en) * | 2007-08-08 | 2009-02-11 | 鹏智科技(深圳)有限公司 | Electronic apparatus capable of automatically choosing power supply source |
| CN202260572U (en) * | 2011-10-28 | 2012-05-30 | 成都因纳伟盛科技股份有限公司 | Hand-held device for stably supplying power to batteries of second-generation identity card reader |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3687409B2 (en) * | 1999-04-26 | 2005-08-24 | トヨタ自動車株式会社 | Vehicle power supply control device |
| WO2007066392A1 (en) * | 2005-12-07 | 2007-06-14 | Fujitsu Limited | Power source control apparatus, battery and handy terminal equipment |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1237283A (en) * | 1997-09-03 | 1999-12-01 | 摩托罗拉半导体公司 | Portable electronic device and method |
| CN101364745A (en) * | 2007-08-08 | 2009-02-11 | 鹏智科技(深圳)有限公司 | Electronic apparatus capable of automatically choosing power supply source |
| CN202260572U (en) * | 2011-10-28 | 2012-05-30 | 成都因纳伟盛科技股份有限公司 | Hand-held device for stably supplying power to batteries of second-generation identity card reader |
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