Utility model content
Goal of the invention of the present utility model is for above weak point, provides one kind to adopt relay jdq1 to prevent from settingWhen standby housing or port are powered, internal motherboard circuit is caused the battery supply set emergency standby power damaging to access protection systemSystem.
The technical scheme realizing above-mentioned utility model purpose is: a kind of battery supply set emergency standby power accesses protectionSystem, including internal motherboard circuit, emergency standby power, described internal motherboard circuit passes through a stand-by power supply detection and accesses electricityRoad connects to emergency standby power；
Described stand-by power supply detection includes being connected to the relay of the positive and negative interpolar of emergency standby power with accessing circuitThe contact sets switch of jdq1, described relay jdq1 is electrically connected with internal motherboard circuit, emergency standby power, respectively by controllingThe closure of described relay jdq1 contact sets switch and then control emergency standby power internally motherboard circuit is powered.
Control the correct internally motherboard circuit of emergency standby power to power by relay jdq1, only relay jdq1 withEmergency standby power connects, and relay jdq1 controls foot to there is voltage difference, the contact sets adhesive of relay jdq1, internal mainboard electricityRoad could obtain electric current；The contact sets switch of described relay jdq1 includes a group contact and b group contact, and a group contact and b group are touchedPoint all includes com end, no end and nc end, and the com end of a group contact is connected with the stand-by power supply input of internal motherboard circuit, a groupThe no end of contact is connected with the positive terminal of emergency standby power, the com end of b group contact ground connection, the no end of b group contact with meet an urgent needThe negative pole end of stand-by power supply is connected.
By arranging diode d2, during the incorrect polarity preventing connect emergency standby power, internal motherboard circuit is burnt out,The internal motherboard circuit of protection；The com end of a group contact of described relay jdq1 and the stand-by power supply input of internal motherboard circuitBetween be also in series with for judging supplied electric power polarity whether correct diode d2, the positive pole of described diode d2 and a groupThe com end of contact connects, and the negative pole of diode d2 is connected with the stand-by power supply input of internal motherboard circuit.
The both positive and negative polarity of relay jdq1 is docked with the both positive and negative polarity of emergency standby power and obtains power supply in order to relay jdq1,So that the contact sets closure of relay jdq1, arranging critesistor ptc1 prevents the overheated damage to circuit；Described relayThe positive pole of jdq1 is connected with the positive pole of emergency standby power, and the negative pole of relay jdq1 is connected with the negative pole of emergency standby power,The positive pole of relay jdq1 is also in series with critesistor ptc1 with the positive interpolar of emergency standby power.
From the operating current of running voltage and relay jdq1 of relay jdq1 be adapted, the critesistor of selectionThe protection voltage of ptc1 should be adapted with the output voltage of emergency standby power, to ensure the normal work of component；DescribedThe running voltage of relay jdq1 is adapted with the output voltage of connect emergency standby power, the protection of described critesistor ptc1Electric current is adapted with the operating current of relay jdq1.
Positive and negative interpolar one diode d1 of parallel connection of relay jdq1, prevents the coil breakage moment of relay jdq1 from producingHigh voltage destroy circuit；Also it is parallel with diode d1 between the positive pole of described relay jdq1 and negative pole, described diode d1'sAnode is connected with the negative pole of relay jdq1, and the negative electrode of diode d1 is connected with the positive pole of relay jdq1.
Described internal motherboard circuit is a battery powered power-saving circuit with complete function.Inside as electronic lockMotherboard circuit: its circuit includes main control chip (single-chip microcomputer), motor control, button collection, fingerprint module, Voice command, electricityThe complete finger-print cipher unlocking function circuit such as source voltage stabilizing, main control chip passes through power switch circuit discrete device and emergency powerThe outfan of power supply connects, and main control chip is connected with the first motor drive module and the second motor drive module, and the first motor drivesDynamic model block is connected with reducing motor, and the second motor drive module is connected with unlocking motor；Described main control chip passes through Voice commandModule is connected with loudspeaker, and described speech control module adopts hrs080-s08 chip；Described main control chip is connected with specificationThe liquid crystal display screen of 128*64；Described main control chip is connected with data memory module, and described data memory module adopts at24lc32 corePiece；Described main control chip is connected with induction keyboard, and described induction keyboard adopts wtc6212ml-5 keyboard；Described main control chip is adoptedUse pic16f1519 chip；Main control chip is also associated with other modules；Described stand-by power supply detection and access circuit are energyWhether detection stand-by power supply input polarity is correct, connects outside emergency standby power by the internal motherboard circuit of ControlInterface circuit, when not connecing stand-by power supply or stand-by power supply and accessing incorrect polarity, relay not adhesive, stand-by power supply port with interiorPortion's motherboard circuit disconnects；When stand-by power supply correctly accesses, relay adhesive, stand-by power supply port is with internal motherboard circuit evenConnect, internal motherboard circuit connects emergency standby power and powers；Described emergency standby power is a moveable power-supply device, itsOutput voltage is typically not less than the running voltage of internal motherboard circuit, such as the power-supply device such as aneroid battery, accumulator, charger baby.
For prior art, this utility model has the advantage that this utility model low cost, simple and practical, adoptsWith relay jdq1 control emergency standby power input port be connected with internal motherboard circuit, when do not connect emergency standby power or answerWhen anxious stand-by power supply accesses incorrect polarity, relay jdq1 not adhesive, diode d2 cut-off, emergency standby power and internal mainboardCircuit disconnects；When emergency standby power input is correct, relay jdq1 adhesive, emergency standby power is with internal motherboard circuit evenConnect, and internally main board power supply, thus realizing the reliably protecting to internal motherboard circuit.
Specific embodiment
With reference to Figure of description and specific embodiment, this utility model content is described in detail:
As shown in Figure 1-2, a kind of battery supply set emergency standby power accesses protection system, including internal mainboard electricityRoad, emergency standby power, described internal motherboard circuit is connected to emergency power electricity with accessing circuit by a stand-by power supply detectionSource；
Described stand-by power supply detection includes being connected to the relay of the positive and negative interpolar of emergency standby power with accessing circuitThe contact sets switch of jdq1, described relay jdq1 is electrically connected with internal motherboard circuit, emergency standby power, respectively by controllingThe closure of described relay jdq1 contact sets switch and then control emergency standby power internally motherboard circuit is powered.
In the present embodiment, the correct internally motherboard circuit of emergency standby power is controlled to power by relay jdq1, onlyRelay jdq1 is had to be connected with emergency standby power, relay jdq1 controls foot to there are voltage difference, the contact sets of relay jdq1Adhesive, internal motherboard circuit could obtain electric current；The contact sets switch of described relay jdq1 includes a group contact and b group contact,A group contact and b group contact all include com end, no end and nc end, the stand-by power supply of the com end of a group contact and internal motherboard circuitInput connects, and the no end of a group contact is connected with the positive terminal of emergency standby power, the com end ground connection of b group contact, and b group is touchedThe no end of point is connected with the negative pole end of emergency standby power.
In the present embodiment, by arranging diode, will internal lead during the incorrect polarity preventing connect emergency standby powerPlate circuit burns out, the internal motherboard circuit of protection；The com end of a group contact of described relay jdq1 is standby with internal motherboard circuitWith being also in series between power input for judging supplied electric power polarity whether correct diode d2, described diode d2Positive pole be connected with the com end of a group contact, the negative pole of diode d2 is connected with the stand-by power supply input of internal motherboard circuit.
In the present embodiment, the both positive and negative polarity of relay jdq1 is docked in order to relay with the both positive and negative polarity of emergency standby powerJdq1 obtains power supply, so that the contact sets closure of relay jdq1, arranging critesistor ptc1 prevents the overheated damage to circuitBad；The described positive pole of relay jdq1 is connected with the positive pole of emergency standby power, and the negative pole of relay jdq1 is electric with emergency powerThe negative pole in source connects, and the positive pole of relay jdq1 is also in series with critesistor ptc1 with the positive interpolar of emergency standby power.
In the present embodiment, the running voltage of relay jdq1 of selection and the operating current of relay jdq1 are adapted,From critesistor ptc1 protection voltage should with the output voltage of emergency standby power be adapted, to ensure componentNormal work；The running voltage of described relay jdq1 is adapted with the output voltage of connect emergency standby power, described temperature-sensitiveThe protective current of resistance ptc1 is adapted with the operating current of relay jdq1.
In the present embodiment, positive and negative interpolar one diode of parallel connection of relay jdq1, prevents the coil of relay jdq1The high voltage that fracture moment produces destroys circuit；Also it is parallel with diode d1, institute between the positive pole of described relay jdq1 and negative poleThe anode stating diode d1 is connected with the negative pole of relay jdq1, and the negative electrode of diode d1 is connected with the positive pole of relay jdq1.
In the present embodiment, described internal motherboard circuit is a battery powered power-saving circuit with complete function.Inside motherboard circuit as electronic lock: its circuit includes main control chip (single-chip microcomputer), motor control, button collection, fingerprint mouldThe complete finger-print cipher unlocking function circuit such as block, Voice command, power supply voltage stabilizing, it is discrete that main control chip passes through power switch circuitDevice is connected with the outfan of emergency standby power, and main control chip and the first motor drive module and the second motor drive module are evenConnect, the first motor drive module is connected with reducing motor, the second motor drive module is connected with unlocking motor；Described main control chipLoudspeaker are connected with by speech control module, described speech control module adopts hrs080-s08 chip；Described main control chip is evenIt is connected to the liquid crystal display screen that specification is 128*64；Described main control chip is connected with data memory module, and described data memory module adoptsAt24lc32 chip；Described main control chip is connected with induction keyboard, and described induction keyboard adopts wtc6212ml-5 keyboard；DescribedMain control chip adopts pic16f1519 chip；Main control chip is also associated with other modules (being specifically shown in Fig. 2)；Described stand-by power supply inspectionSurvey and be whether correctly one can be detected stand-by power supply input polarity with access circuit, by the internal motherboard circuit of Control evenConnect the interface circuit of outside emergency standby power, when not connecing stand-by power supply or stand-by power supply accesses incorrect polarity, relay is notAdhesive, stand-by power supply port is disconnected with internal motherboard circuit；When stand-by power supply correctly accesses, relay adhesive, stand-by power supplyPort is connected with internal motherboard circuit, and internal motherboard circuit is powered using emergency standby power；Described emergency standby power, is oneIndividual moveable power-supply device, its output voltage is typically not less than the running voltage of internal motherboard circuit, such as aneroid battery, electric power storageThe power-supply devices such as pond, charger baby.
In the present embodiment, the stand-by power supply input port of internal motherboard circuit and stand-by power supply detect and access continuing of circuitElectrical equipment jdq1 common port connects, the emergency power supply interface of the normally opened termination battery supply set of relay jdq1.Work as emergency powerWhen power supply does not access, because stand-by power supply detection does not have power supply with accessing circuit, relay jdq1 controls foot no-voltage, relayThe emergency power supply interface open circuit of jdq1 not adhesive, the stand-by power supply input port of internal motherboard circuit and battery supply set, electricallyCompletely isolated；When emergency standby power accesses incorrect polarity, due to the one-way conduction characteristic of diode d2, stand-by power supply detectsWith access circuit still without obtaining power supply, relay jdq1 controls foot no-voltage poor, relay jdq1 not adhesive, internal mainboard electricityThe emergency power supply interface open circuit of the stand-by power supply input port on road and battery supply set, electrically completely isolated；Power when battery and setWhen standby emergency power supply input port is simultaneously or single port accesses forceful electric power, because stand-by power supply detection is returned with accessing circuit no currentRoad, then still no-voltage is poor for relay jdq1 control circuit, relay jdq1 not adhesive, the stand-by power supply input of internal motherboard circuitMouthful open a way with the emergency power supply interface of battery supply set, electrically completely isolated；Only when emergency standby power accesses correct,Diode d2 turns on, and stand-by power supply detection obtains power supply with accessing circuit, and relay jdq1 controls foot to have voltage difference, relayJdq1 adhesive, the stand-by power supply input port of internal motherboard circuit is connected with the emergency power supply interface of battery supply set, internal mainPlate circuit is powered by emergency standby power.
In the present embodiment, when the power output of emergency standby power correctly accesses stand-by power supply detection and accesses circuitWhen, the electric current of emergency standby power passes through critesistor (resettable fuse) ptc1, powers to relay jdq1, relayJdq1 adhesive, the com end of relay jdq1 is turned on no end, and emergency standby power is switched by the contact sets of relay jdq1 againPowered by the power circuit of diode d2 internally motherboard circuit.The selection of its repeat circuit jdq1 need to be according to emergency power supplyOut-put supply determines, relay jdq1 preferably selects the relay jdq1 of wide scope running voltage, and such as emergency power supply inspires confidence in for 9v southDuring 6lr61 battery, the optional running voltage of relay jdq1 in 9v about, resistance to height is typically selected in the selection of critesistor ptc1Pressure, the device of low current, its protective current need to be matched with the operating current of relay jdq1, such as the relay of operating current 20maDevice jdq1, critesistor ptc1 is preferably selected running voltage 250v, and protective current is also critesistor (the self- recoverage insurance of 20maSilk).
Above-listed preferred embodiment, is further described to the purpose of this utility model, technical scheme and advantage,Be should be understood that and be the foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, allWithin spirit of the present utility model and principle, any modification, equivalent substitution and improvement made etc., should be included in this practicalityWithin new protection domain.