CN204405810U - Accumulator short of electricity warning device - Google Patents
Accumulator short of electricity warning device Download PDFInfo
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- CN204405810U CN204405810U CN201520100918.3U CN201520100918U CN204405810U CN 204405810 U CN204405810 U CN 204405810U CN 201520100918 U CN201520100918 U CN 201520100918U CN 204405810 U CN204405810 U CN 204405810U
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Abstract
The utility model relates to a kind of accumulator short of electricity warning device, comprises voltage collection circuit, voltage comparator circuit, logical relation decision circuitry, on-off circuit, flicker warning circuit, voltage collection circuit comprises the first voltage acquisition branch road by the first resistance and the second resistant series, and by the 3rd resistance, second voltage acquisition branch road of the 4th resistance and the 5th resistant series, voltage comparator circuit is used for the first voltage acquisition point, second voltage acquisition point, voltage and the 6V reference voltage of tertiary voltage collection point compare, the output terminal of voltage comparator circuit connects logical relation decision circuitry, when the accumulator voltage that nominal voltage is 12V is less than 12V, or when the accumulator voltage that nominal voltage is 24V is less than 24V, the output terminal of logical relation decision circuitry exports high level, on-off circuit conducting, the flicker of flicker warning circuit is reported to the police.Advantage: can detect nominal voltage is whether the accumulator of 12V or 24V is in power shortage state.
Description
Technical field
The utility model relates to the short of electricity warning device that a kind of nominal voltage is the accumulator of 12V or 24V.
Background technology
In daily life, some electronic equipments such as electronic toy, battery truck etc. all can use lead-acid accumulator, and the nominal voltage of lead-acid accumulator mostly is 12V or 24V.Special in photovoltaic generation industry, solar street light is widely applied, and its system also adopts the lead-acid accumulator of 12V or 24V substantially.Above-mentioned electronic equipment in use, often can cause accumulator short of electricity because of accumulator over-discharge can, or accumulator for a long time the idle electricity that also can run off because of self discharge cause accumulator short of electricity, the power shortage state of accumulator also i.e. under-voltage duty.Under power shortage state, nominal voltage is that the accumulator voltage of 12V is less than 12V, and nominal voltage is that the accumulator voltage of 24V is less than 24V.
If charged not in time under power shortage state, accumulator will affect its serviceable life greatly because short of electricity uses.In addition, user is often unclear to accumulator dump energy when using accumulator, and charging may cause the situations such as battery-operated midway electric power is not enough not in time.
In general, nominal voltage is the full charge pressure of the accumulator of 12V is 14.1V, and nominal voltage is the full charge pressure of the accumulator of 24V is 28.2V.When the accumulator voltage that nominal voltage is 12V is less than 12V, or nominal voltage is the accumulator voltage of 24V when being less than 24V, and accumulator is in power shortage state, if accumulator uses under power shortage state always, accumulator finally can end electric discharge, also namely stops the power supply to being powered body.In general, discharge cut-off voltage when nominal voltage is the accumulator short of electricity of 12V is 10.8-11.4V, and discharge cut-off voltage when nominal voltage is the accumulator short of electricity of 24V is 21.6-22.8V.
Utility model content
The utility model for deficiency of the prior art, provide a kind of can detect nominal voltage be the accumulator of 12V or 24V whether be in power shortage state, to user with charge prompting, the accumulator short of electricity warning device improving service lifetime of accumulator and work efficiency.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme:
Accumulator short of electricity warning device, comprises the voltage collection circuit, voltage comparator circuit, logical relation decision circuitry, on-off circuit and the flicker warning circuit that connect successively;
Described voltage collection circuit comprises and is connected to the first voltage acquisition branch road be made up of the first resistance and the second resistant series that nominal voltage is the accumulator two ends of 12V or 24V, and be connected to the second voltage acquisition branch road be made up of the 3rd resistance, the 4th resistance and the 5th resistant series at these accumulator two ends, the first voltage acquisition branch road and the second voltage acquisition branch circuit parallel connection; The resistance value ratio of the first resistance and the second resistance is form the first voltage acquisition point between 2 ﹕ 1, first resistance and the second resistance, so the voltage of the first voltage acquisition point is accumulator voltage
the resistance value ratio of the 3rd resistance, the 4th resistance, the 5th resistance is 2 ﹕ 1 ﹕ 1, the second voltage acquisition point is formed between 3rd resistance and the 4th resistance, tertiary voltage collection point is formed, so the voltage of the second voltage acquisition point is accumulator voltage between 4th resistance and the 5th resistance
the voltage of tertiary voltage collection point is accumulator voltage
Described voltage comparator circuit comprises the first comparer, second comparer, 3rd comparer, first comparer, second comparer, the in-phase end of the 3rd comparer all connects the positive pole that voltage stabilizing value is first voltage stabilizing diode of 6V, the positive pole of the first voltage stabilizing diode connects VCC by the 7th resistance, the end of oppisite phase of the first comparer connects described second voltage acquisition point, the end of oppisite phase of the second comparer connects described first voltage acquisition point, the end of oppisite phase of the 3rd comparer connects described tertiary voltage collection point, first comparer, second comparer, 3rd comparer is used for exporting high level when in-phase end voltage is greater than end of oppisite phase voltage, the output low level when in-phase end voltage is less than end of oppisite phase voltage,
Described logical relation decision circuitry comprises the first not gate be connected with the output terminal of described first comparer, the second not gate be connected with the output terminal of described second comparer, the output terminal of the second not gate is connected the first Sheffer stroke gate with the output terminal of described 3rd comparer, and the output terminal of the first not gate is connected the second Sheffer stroke gate with the output terminal of described first Sheffer stroke gate; Logical relation decision circuitry is used for when the accumulator voltage that nominal voltage is 12V is less than 12V (short of electricity), or when the accumulator voltage that nominal voltage is 24V is less than 24V (short of electricity), the output terminal of logical relation decision circuitry exports high level, when the accumulator voltage that nominal voltage is 12V is greater than 12V (not short of electricity), or when the accumulator voltage that nominal voltage is 24V is greater than 24V (not short of electricity), the output terminal output low level of logical relation decision circuitry;
Described on-off circuit is the first triode, the base stage of the first triode connects the output terminal of described second Sheffer stroke gate by the 11 resistance, the collector of the first triode connects VCC, the emitter of the first triode connects the input end of flicker warning circuit, emitter and the collector conducting of the first triode when the second Sheffer stroke gate exports high level, the emitter output high level of the first triode;
Described flicker warning circuit comprises the second triode and the 3rd triode, the base stage of the second triode connects the emitter of described first triode by the 14 resistance, the collector of the second triode by connecting the emitter of the first triode described in the 12 resistance, the second transistor emitter ground connection; The base stage of the 3rd triode connects the emitter of described first triode by the 13 resistance, the collector of the 3rd triode is connected the emitter of described first triode by light emitting diode and the 15 resistance, the 3rd transistor emitter ground connection; Be connected with the first electric capacity between the base stage of described second triode and the collector of the 3rd triode, between the collector of described second triode and the base stage of the 3rd triode, be connected with the second electric capacity; When the second triode cut-off, the 3rd triode ON, LED operation, when the second triode ON, the 3rd triode cut-off, light emitting diode does not work, and realizes light emitting diode alternation and idle flicker warning with this.
Further, the output terminal of described first comparer connects the positive pole that voltage stabilizing value is second voltage stabilizing diode of 5V, the output terminal of the second comparer connects the positive pole that voltage stabilizing value is the 3rd voltage stabilizing diode of 5V, and the output terminal of the 3rd comparer connects the positive pole that voltage stabilizing value is the 4th voltage stabilizing diode of 5V.
Further, described 12 resistance and the 15 resistance are 1k Ω, and the 13 resistance and the 14 resistance are 100k Ω, and the first electric capacity and the second electric capacity are 10nF.
Further, described first comparer, the second comparer, the 3rd comparer adopt chip LM393P.
Further, described first not gate and the second not gate adopt chip 74LS04N, and described first Sheffer stroke gate and the second Sheffer stroke gate adopt chip 74LS00D.
Further, described VCC is 9V.
Technical conceive of the present utility model is: the nominal voltage of the accumulator of whether short of electricity to be detected is 12V or 24V, the resistance value ratio arranging the first resistance and the second resistance is 2 ﹕ 1, to gather the voltage of the first voltage acquisition point, the voltage of the first voltage acquisition point A is accumulator voltage
arrange the 3rd resistance, the 4th resistance, the 5th resistance resistance value ratio be 2 ﹕ 1 ﹕ 1, to gather the voltage of the second voltage acquisition point and tertiary voltage collection point, the voltage of the second voltage acquisition point B is accumulator voltage
the voltage of tertiary voltage collection point C is accumulator voltage
First comparer, second comparer, 3rd comparer is respectively by the second voltage acquisition point, first voltage acquisition point, the 6V reference voltage that the magnitude of voltage of tertiary voltage collection point and the first voltage stabilizing diode provide compares, when the second voltage acquisition point, first voltage acquisition point, when the magnitude of voltage of tertiary voltage collection point is lower than 6V reference voltage, first comparer, second comparer, 3rd comparer exports high level, when the second voltage acquisition point, first voltage acquisition point, during the 6V reference voltage that the magnitude of voltage of tertiary voltage collection point provides higher than the first voltage stabilizing diode, first comparer, second comparer, 3rd comparer output low level,
Logical relation decision circuitry is connected to the output terminal of voltage comparator circuit, voltage collection circuit, the logic that voltage comparator circuit and logical relation decision circuitry realize jointly is, the accumulator voltage being 12V when nominal voltage is less than 12V (short of electricity), or when nominal voltage is that the accumulator voltage of 24V is less than 24V (short of electricity), the output terminal of logical relation decision circuitry exports high level, the high level that logical relation decision circuitry exports makes on-off circuit conducting, the emitter of the first triode exports high level, this high level makes the LED flash of flicker warning circuit report to the police, when the accumulator voltage that nominal voltage is 12V is greater than 12V (not short of electricity), or when the accumulator voltage that nominal voltage is 24V is greater than 24V (not short of electricity), the output terminal output low level of logical relation decision circuitry, the warning circuit that now glimmers or not warning,
The principle of work of flicker warning circuit is: in on-off circuit conducting situation, the voltage that the emitter of the first triode exports is VCC, when the 3rd triode ON, the collector and emitter conducting of the 3rd triode makes current collection very low level, LED operation, now the right-hand member of the first electric capacity is connected for low level with the collector of the 3rd triode, the left end of the first electric capacity is pulled into low level by its right-hand member instantaneously, so the base stage of the second triode is low level, second triode cut-off, the second triode cut-off when being also the 3rd triode ON, because the first electric capacity left end is low level, VCC passes through the 14 resistance to the first capacitor charging, when the left end charging to the first electric capacity is 0.7V, also when namely the base voltage of the second triode is 0.7V, second triode ON, the collector of the second triode and emitter conducting are low level, the left end of the second electric capacity is low level, the right-hand member of the second electric capacity is drawn as low level instantaneously, the base stage of the 3rd triode be connected with the right-hand member of the second electric capacity is low level, so the 3rd triode cut-off, light emitting diode does not work, left end due to the second electric capacity is low level, VCC passes through the 12 resistance to the second capacitor charging, when the right-hand member of the second electric capacity charges to 0.7V, 3rd triode conducting again, the current collection very low level of the 3rd triode, the right-hand member of the first electric capacity is low level, the left end of the first electric capacity is drawn as low level instantaneously, so the base stage of the second triode is low level, 3rd triode ends again.So, flicker warning circuit be operated in or the 3rd triode ON, second triode cut-off, or the 3rd triode cut-off, the second triode ON state, light emitting diode alternation with do not work, realize flicker report to the police.
The beneficial effects of the utility model are: can detect nominal voltage is whether the accumulator of 12V or 24V is in power shortage state, and when accumulator is in power shortage state, this accumulator short of electricity warning device is reported to the police by the flicker of flicker warning circuit; User to charge in batteries, to avoid battery-operated at power shortage state, can improve serviceable life and the work efficiency of accumulator under alarm; This accumulator short of electricity warning device is arranged on accumulator, connects use with accumulator positive negative electrode.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the utility model accumulator short of electricity warning device.
Fig. 2 is the circuit theory diagrams of the utility model accumulator short of electricity warning device.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail:
With reference to Fig. 1-2: accumulator short of electricity warning device, comprise the voltage collection circuit, voltage comparator circuit, logical relation decision circuitry, on-off circuit and the flicker warning circuit that connect successively;
Described voltage collection circuit comprises and is connected to the first voltage acquisition branch road in series by the first resistance R1 and the second resistance R2 that nominal voltage is the accumulator two ends of 12V or 24V, and be connected to the second voltage acquisition branch road in series by the 3rd resistance R3, the 4th resistance R4 and the 5th resistance R5 at these accumulator two ends, the first voltage acquisition branch road and the second voltage acquisition branch circuit parallel connection; The resistance value ratio of the first resistance R1 and the second resistance R2 is form the first voltage acquisition point A between 2 ﹕ 1, first resistance R1 and the second resistance R2, so the voltage of the first voltage acquisition point A is accumulator voltage
the resistance value ratio of the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5 is 2 ﹕ 1 ﹕ 1, the second voltage acquisition point B is formed between 3rd resistance R3 and the 4th resistance R4, tertiary voltage collection point C is formed, so the voltage of the second voltage acquisition point B is accumulator voltage between 4th resistance R4 and the 5th resistance R5
the voltage of tertiary voltage collection point C is accumulator voltage
Described voltage comparator circuit comprises the first comparer A1, second comparer A2, 3rd comparer A3, first comparer A1, second comparer A2, the in-phase end of the 3rd comparer A3 all connects the positive pole that voltage stabilizing value is the first voltage stabilizing diode D1 of 6V, the positive pole of the first voltage stabilizing diode connects VCC by the 7th resistance R7, 7th resistance R7 resistance is 30K Ω, the end of oppisite phase of the first comparer A1 connects described second voltage acquisition point B, the end of oppisite phase of the second comparer A2 connects described first voltage acquisition point A, the end of oppisite phase of the 3rd comparer A3 connects described tertiary voltage collection point C, first comparer A1, second comparer A2, 3rd comparer A3 is used for exporting high level when in-phase end voltage is greater than end of oppisite phase voltage, the output low level when in-phase end voltage is less than end of oppisite phase voltage, the output terminal of described first comparer A1 connects the positive pole that voltage stabilizing value is the second voltage stabilizing diode D2 of 5V, the output terminal of the second comparer A2 connects the positive pole that voltage stabilizing value is the 3rd voltage stabilizing diode D3 of 5V, the output terminal of the 3rd comparer A3 connects the positive pole that voltage stabilizing value is the 4th voltage stabilizing diode D4 of 5V, the minus earth of the negative pole of the second voltage stabilizing diode D2, the negative pole of the 3rd voltage stabilizing diode D3 and the 4th voltage stabilizing diode D4, due to the first comparer A1, second comparer A2, when 3rd comparer A3 exports high level, first comparer A1, second comparer A2, the output terminal of the 3rd comparer A3 roughly exports 5V voltage, therefore the second voltage stabilizing diode D2 that voltage stabilizing value is 5V is increased, 3rd voltage stabilizing diode D3, 4th voltage stabilizing diode D4 is with the output voltage of stable comparer, and as the first comparer A1, second comparer A2, during the 3rd comparer A3 output low level, voltage stabilizing value is the second voltage stabilizing diode D2 of 5V, 3rd voltage stabilizing diode D3, 4th voltage stabilizing diode D4 is inoperative, first comparer A1, second comparer A2, the output of the 3rd comparer A3 or low level 0V,
The output terminal of described first comparer A1 is connected to VCC by the 8th resistance R8, the output terminal of the second comparer A2 is connected to VCC by the 9th resistance R9, the output terminal of the 3rd comparer A3 is connected to VCC by the tenth resistance R10, and described 8th resistance R8, the 9th resistance R9, the tenth resistance R10 are pull-up resistor; The positive power source terminal of the positive supply input end of the first comparer A1, the positive supply input end of the second comparer A2, the 3rd comparer A3 all connects VCC, the negative power end ground connection of the negative power end of the first comparer, the negative power end of the second comparer, the 3rd comparer;
Described logical relation decision circuitry comprises the first not gate U1 be connected with the output terminal of described first comparer A1, the second not gate U2 be connected with the output terminal of described second comparer A2, the output terminal of the second not gate U2 is connected the first Sheffer stroke gate U3 with the output terminal of described 3rd comparer A3, and the output terminal of the first not gate U1 is connected the second Sheffer stroke gate U4 with the output terminal of described first Sheffer stroke gate U3; Logical relation decision circuitry is used for when the accumulator voltage that nominal voltage is 12V is less than 12V (short of electricity), or when the accumulator voltage that nominal voltage is 24V is less than 24V (short of electricity), the output terminal of logical relation decision circuitry exports high level, when the accumulator voltage that nominal voltage is 12V is greater than 12V (not short of electricity), or when the accumulator voltage that nominal voltage is 24V is greater than 24V (not short of electricity), the output terminal output low level of logical relation decision circuitry;
Described on-off circuit is the first triode Q1, the base stage of the first triode Q1 connects the output terminal of described second Sheffer stroke gate U4 by the 11 resistance R11, the collector of the first triode Q1 connects VCC, the emitter of the first triode Q1 connects the input end of flicker warning circuit, emitter and the collector conducting of the first triode Q1 when the second Sheffer stroke gate U4 exports high level, the emitter output high level of the first triode Q1;
Described flicker warning circuit comprises the second triode Q2 and the 3rd triode Q3, the base stage of the second triode Q2 connects the emitter of described first triode Q1 by the 14 resistance R14, the collector of the second triode Q2 by connecting the emitter of the first triode Q1 described in the 12 resistance R12, the second triode Q2 grounded emitter; The base stage of the 3rd triode Q3 connects the emitter of described first triode Q1 by the 13 resistance R13, the collector of the 3rd triode Q3 is connected the emitter of described first triode Q1, the 3rd triode Q3 grounded emitter with the 15 resistance R15 by LED 1; Be connected with the first electric capacity C1 between the base stage of described second triode Q2 and the collector of the 3rd triode Q3, between the collector of described second triode Q2 and the base stage of the 3rd triode Q3, be connected with the second electric capacity C2; When the second triode Q2 cut-off, the 3rd triode Q3 conducting, LED 1 works (luminescence), when the second triode Q2 conducting, the 3rd triode Q3 end, LED 1 does not work (not luminous), realizes LED 1 alternation and idle flicker warning with this.In flicker warning circuit, the 12 resistance R12 and the 15 resistance R15 is 1k Ω, and the 13 resistance R13 and the 14 resistance R14 is 100k Ω, and the first electric capacity C1 and the second electric capacity C2 is 10nF.
In the present embodiment, described first comparer A1, the second comparer A2, the 3rd comparer A3 adopt chip LM393P; Described first not gate U1 and the second not gate U2 adopts chip 74LS04N, and described first Sheffer stroke gate U3 and the second Sheffer stroke gate U4 adopts chip 74LS00D.
In the present embodiment, described VCC is 9V.
The principle of work of the present embodiment: the nominal voltage of the accumulator of whether short of electricity to be detected is 12V or 24V, the resistance value ratio arranging the first resistance R1 and the second resistance R2 is 2 ﹕ 1, to gather the voltage of the first voltage acquisition point A, 3rd resistance R3, the 4th resistance R4 are set, the resistance value ratio of the 5th resistance R5 is 2 ﹕ 1 ﹕ 1, to gather the voltage of the second voltage acquisition point B and tertiary voltage collection point C;
First comparer A1, second comparer A2, 3rd comparer A3 is respectively by the second voltage acquisition point B, first voltage acquisition point A, the 6V reference voltage that the magnitude of voltage of tertiary voltage collection point C and the first voltage stabilizing diode D1 provide compares, as the second voltage acquisition point B, first voltage acquisition point A, when the magnitude of voltage of tertiary voltage collection point C is lower than 6V reference voltage, first comparer A1, second comparer A2, 3rd comparer A3 exports high level, as the second voltage acquisition point B, first voltage acquisition point A, during the 6V reference voltage that the magnitude of voltage of tertiary voltage collection point C provides higher than the first voltage stabilizing diode D1, first comparer A1, second comparer A2, 3rd comparer A3 output low level,
Logical relation decision circuitry is connected to the output terminal of voltage comparator circuit, voltage collection circuit, the logic that voltage comparator circuit and logical relation decision circuitry realize jointly is, the accumulator voltage being 12V when nominal voltage is less than 12V (short of electricity), or when nominal voltage is that the accumulator voltage of 24V is less than 24V (short of electricity), the output terminal of logical relation decision circuitry exports high level, the high level that logical relation decision circuitry exports makes on-off circuit conducting, the emitter of the first triode exports high level, this high level makes the LED flash of flicker warning circuit report to the police, when the accumulator voltage that nominal voltage is 12V is greater than 12V (not short of electricity), or when the accumulator voltage that nominal voltage is 24V is greater than 24V (not short of electricity), the output terminal output low level of logical relation decision circuitry, the warning circuit that now glimmers or not warning,
The principle of work of flicker warning circuit is: in on-off circuit conducting situation, the voltage that the emitter of the first triode Q1 exports is VCC, when the 3rd triode Q3 conducting, the collector and emitter conducting of the 3rd triode Q3 makes current collection very low level, LED work (luminescence), now the right-hand member of the first electric capacity C1 is connected for low level with the collector of the 3rd triode Q3, the left end of the first electric capacity C1 is pulled into low level by its right-hand member instantaneously, so the base stage of the second triode Q2 is low level, second triode Q2 ends, when being also the 3rd triode Q3 conducting, the second triode Q2 ends, because the first electric capacity C1 left end is low level, VCC is charged to the first electric capacity C1 by the 14 resistance R14, when the left end charging to the first electric capacity C1 is 0.7V, also when namely the base voltage of the second triode Q2 is 0.7V, second triode Q2 conducting, the collector of the second triode Q2 and emitter conducting are low level, the left end of the second electric capacity C2 is low level, the right-hand member of the second electric capacity C2 is drawn as low level instantaneously, the base stage of the 3rd triode Q3 be connected with the right-hand member of the second electric capacity C2 is low level, so the 3rd triode Q3 ends, LED does not work (not luminous), left end due to the second electric capacity C2 is low level, VCC is charged to the second electric capacity C2 by the 12 resistance R12, when the right-hand member of the second electric capacity C2 charges to 0.7V, 3rd triode Q3 conducting again, the current collection very low level of the 3rd triode Q3, the right-hand member of the first electric capacity C1 is low level, the left end of the first electric capacity C1 is drawn as low level instantaneously, so the base stage of the second triode Q2 is low level, 3rd triode Q3 ends again.So flicker warning circuit is operated in or the 3rd triode Q3 conducting, the second triode Q2 ends, or the 3rd triode Q3 ends, the state of the second triode Q2 conducting, light emitting diode alternation with do not work, realize flicker warning.
The logic that voltage collection circuit, voltage comparator circuit and logical relation decision circuitry realize jointly is, when nominal voltage is accumulator short of electricity (under-voltage) of 12V or 24V, the output terminal of logical relation decision circuitry exports high level.Below analyze this logic how to realize:
Voltage collection circuit comprises the first voltage acquisition branch road and the second voltage acquisition branch road that are connected to accumulator two ends.First voltage acquisition props up route first resistance R1 and the second resistance R2 is in series, R1 and R2 resistance value ratio is 2:1, so the voltage of the first voltage acquisition point A is accumulator voltage
second voltage acquisition of voltage collection circuit props up route the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5 is in series, and the resistance value ratio of R3, R4, R5 is 2:1:1, so the voltage of the second voltage acquisition point B is accumulator voltage
the voltage of tertiary voltage collection point C is accumulator voltage
The end of oppisite phase of the first comparer A1 is connected with the second voltage acquisition point B, and the output of the first comparer is E; The end of oppisite phase of the second comparer A2 is connected with the first voltage acquisition point A, and the output of the second comparer is F; The end of oppisite phase of the 3rd comparer A3 is connected with tertiary voltage collection point C, and the output of the 3rd comparer is G.When in-phase end voltage is greater than end of oppisite phase voltage, first comparer A1, the second comparer A2, the 3rd comparer A3 export high level, represent, when in-phase end voltage is less than end of oppisite phase voltage with 1, first comparer A1, the second comparer A2, the 3rd comparer A3 output low level, represent with 0.According to comparer principle of work, the first voltage acquisition point A of accumulator, the second voltage acquisition point B, the voltage of tertiary voltage collection point C and output F, the output E of the first comparer A1 of the second comparer A2, the logical relation of the output G of the 3rd comparer A3 can be obtained.
Accumulator short of electricity refers to that accumulator voltage is less than the state of its nominal voltage.If namely nominal voltage is the accumulator short of electricity of 12V, accumulator voltage is less than 12V, so the voltage of the first voltage acquisition point A is less than 4V, the voltage of the second voltage acquisition point B is less than 6V, and the voltage of tertiary voltage collection point C is less than 3V, and now F, E, G are 111; If nominal voltage is the accumulator short of electricity of 24V, accumulator voltage is less than 24V, so the voltage of the first voltage acquisition point A is less than 8V but is greater than 6V, the voltage of the second voltage acquisition point B is less than 12V but is greater than 6V, the voltage of tertiary voltage collection point C is less than 6V, and now F, E, G are 001.Even if when nominal voltage is the accumulator short of electricity of 24V, the voltage of the first voltage acquisition point A is less than 8V but is greater than 6V is because accumulator voltage Severe Power Shortage also can not be down to 18V, in like manner, even if when nominal voltage is the accumulator short of electricity of 24V, the voltage of the second voltage acquisition point B is less than 12V but is greater than 6V is because accumulator voltage Severe Power Shortage also can not be down to 12V.In general, discharge cut-off voltage when nominal voltage is the accumulator short of electricity of 12V is 10.8-11.4V, discharge cut-off voltage when nominal voltage is the accumulator short of electricity of 24V is 21.6-22.8V, namely also nominal voltage is that the accumulator voltage of 12V is when being down to 10.8-11.4V, accumulator stops the power supply being powered body, accumulator is stopped power supply automatically, and the accumulator voltage that nominal voltage is 24V is when being down to 21.6-22.8V, accumulator stops the power supply being powered body, and accumulator is stopped power supply automatically.
Namely accumulator not short of electricity refers to that accumulator voltage is greater than the state of its nominal voltage, and also nominal voltage is that the terminal voltage of the accumulator of 12V is greater than 12V, or nominal voltage is that the terminal voltage of the accumulator of 24V is greater than 24V.Nominal voltage is that the terminal voltage of the accumulator of 12V is when being greater than 12V, the voltage of the first voltage acquisition point A is greater than 4V but is less than 6V, the voltage of the second voltage acquisition point B is greater than 6V, and the voltage of tertiary voltage collection point C is greater than 3V but is less than 6V, and now F, E, G are 101; When the terminal voltage that nominal voltage is the accumulator of 24V is greater than 24V, the voltage of the first voltage acquisition point A is greater than 8V, and the voltage of the second voltage acquisition point B is greater than 12V, and the voltage of tertiary voltage collection point C is greater than 6V, and now F, E, G are 000.Even if when nominal voltage is the accumulator not short of electricity of 12V, the voltage of the first voltage acquisition point A is greater than 4V but is less than 6V is also can not be high to 18V because of accumulator voltage during full electricity, in like manner, even if when nominal voltage is the accumulator not short of electricity of 12V, the voltage of tertiary voltage collection point C is greater than 3V but is less than 6V is also can not be high to 24V because of accumulator voltage during full electricity.In general, nominal voltage is the full charge pressure of the accumulator of 12V is 14.1V, and nominal voltage is the full charge pressure of the accumulator of 24V is 28.2V.
So the logical relation of the voltage of the first voltage acquisition point A, the second voltage acquisition point B, tertiary voltage collection point C and output F, the output E of the first comparer A1 of the second comparer A2, the output G of the 3rd comparer A3 is as shown in following table one.
Except above-mentioned 111,101,001,000, other combination of F, E, G can not occur, namely F, E, G are respectively 010,011,100,110 and can not occur.
Logical relation decision circuitry is made up of the first not gate U1, the second not gate U2, the first Sheffer stroke gate U3, the second Sheffer stroke gate U4.Its logic circuit design method is as follows:
When nominal voltage is the accumulator short of electricity of 12V, when nominal voltage is the accumulator short of electricity of 24V, logical relation decision circuitry should be made to export high level, i.e. actuating switch circuit and flicker warning circuit; When nominal voltage is the accumulator not short of electricity of 12V, when nominal voltage is the accumulator not short of electricity of 24V, logical relation decision circuitry output low level should be made, i.e. cutoff switch circuit and flicker warning circuit.Obtain the second comparer A2 output F thus, the first comparer A1 exports E, the 3rd comparer A3 exports the relation of the output H of G and logical relation decision circuitry as shown in following table two.
Except above-mentioned 111,101,001,000, other state of F, E, G can not occur, namely F, E, G be 010,011,100,110 state can not occur, so these states are considered as outlier.So according to table two, the logical relation obtained after logical relation decision circuitry abbreviation is:
According to above-mentioned formula, the first comparer A1 exports E and connects the first not gate U1, and the output terminal of the first not gate U1 is connected to an input end of the second Sheffer stroke gate U4; The output F of the second comparer A2 connects the second not gate U2, and the output terminal of the second not gate U2 is connected to an input end of the first Sheffer stroke gate U3; The output G of the 3rd comparer A3 is connected to another input end of the first Sheffer stroke gate U3, and the output terminal of the first Sheffer stroke gate U3 is connected to another input end of the second Sheffer stroke gate U4.The output H point of the second Sheffer stroke gate U4 is the output of logical relation decision circuitry.
Thus, achieve when nominal voltage is accumulator short of electricity (under-voltage) of 12V or 24V, the output H of logical relation decision circuitry is high level, and when nominal voltage is the accumulator not short of electricity of 12V or 24V, the output H of logical relation decision circuitry is low level.
The high level that logical relation decision circuitry exports makes on-off circuit conducting, and the flicker of flicker warning circuit is reported to the police, and achieves when nominal voltage is accumulator short of electricity (under-voltage) of 12V or 24V, the function that the flicker of flicker warning circuit is reported to the police.
It should be noted that, accumulator voltage is just equaled to the state of its nominal voltage, the state probability of happening that this accumulator voltage just equals its nominal voltage is very little, because comparer inside adopts differential amplifier circuit, differential amplifier circuit can amplify very little differential signal, so for the in-phase end voltage of comparer and the very little situation of end of oppisite phase voltage difference, comparer also can make a distinction, when terminal voltage is greater than end of oppisite phase voltage in the same way, comparer exports high level, comparer output low level when terminal voltage is less than end of oppisite phase voltage in the same way.If but just in case the forward end voltage of comparer just equals end of oppisite phase voltage, the character of comparer is, the output of state before the output of comparer can continue, if state in-phase terminal voltage is greater than end of oppisite phase voltage before, comparer can continue output high level, if state in-phase terminal voltage is less than end of oppisite phase voltage before, comparer can continue output low level.Always this accumulator short of electricity warning device connects use with accumulator, when the terminal voltage that nominal voltage is the accumulator of 12V just equals nominal voltage 12V, the voltage of the second voltage acquisition point B equals 6V, the in-phase end voltage of the first comparer is equal with end of oppisite phase voltage, the output of the first comparer is the output of state before, because accumulator is using its terminal voltage to reduce gradually always, therefore before, the terminal voltage of state accumulator is greater than 12V, the voltage of the second voltage acquisition point B is greater than 6V, the end of oppisite phase voltage of the first comparer is greater than in-phase end voltage, first comparer output low level, therefore when the in-phase end voltage of the first comparer equals end of oppisite phase voltage, the output of state before first comparer continuity, output low level, now F, E, G is 101, logical relation decision circuitry output low level, flicker warning circuit does not glimmer warning, in like manner, when the terminal voltage that nominal voltage is the accumulator of 24V just equals nominal voltage 24V, the voltage of tertiary voltage collection point C equals 6V, the in-phase end voltage of the 3rd comparer is equal with end of oppisite phase voltage, the now output of state before the 3rd comparer continuity, output low level, now F, E, G are 000, logical relation decision circuitry output low level, flicker warning circuit does not glimmer warning.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all make within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (6)
1. accumulator short of electricity warning device, is characterized in that: comprise the voltage collection circuit, voltage comparator circuit, logical relation decision circuitry, on-off circuit and the flicker warning circuit that connect successively;
Described voltage collection circuit comprises and is connected to the first voltage acquisition branch road be made up of the first resistance and the second resistant series that nominal voltage is the accumulator two ends of 12V or 24V, and be connected to the second voltage acquisition branch road be made up of the 3rd resistance, the 4th resistance and the 5th resistant series at these accumulator two ends, the first voltage acquisition branch road and the second voltage acquisition branch circuit parallel connection; The resistance value ratio of the first resistance and the second resistance is form the first voltage acquisition point between 2 ﹕ 1, first resistance and the second resistance, so the voltage of the first voltage acquisition point is accumulator voltage
the resistance value ratio of the 3rd resistance, the 4th resistance, the 5th resistance is 2 ﹕ 1 ﹕ 1, the second voltage acquisition point is formed between 3rd resistance and the 4th resistance, tertiary voltage collection point is formed, so the voltage of the second voltage acquisition point is accumulator voltage between 4th resistance and the 5th resistance
the voltage of tertiary voltage collection point is accumulator voltage
Described voltage comparator circuit comprises the first comparer, second comparer, 3rd comparer, first comparer, second comparer, the in-phase end of the 3rd comparer all connects the positive pole that voltage stabilizing value is first voltage stabilizing diode of 6V, the positive pole of the first voltage stabilizing diode connects VCC by the 7th resistance, the end of oppisite phase of the first comparer connects described second voltage acquisition point, the end of oppisite phase of the second comparer connects described first voltage acquisition point, the end of oppisite phase of the 3rd comparer connects described tertiary voltage collection point, first comparer, second comparer, 3rd comparer is used for exporting high level when in-phase end voltage is greater than end of oppisite phase voltage, the output low level when in-phase end voltage is less than end of oppisite phase voltage,
Described logical relation decision circuitry comprises the first not gate be connected with the output terminal of described first comparer, the second not gate be connected with the output terminal of described second comparer, the output terminal of the second not gate is connected the first Sheffer stroke gate with the output terminal of described 3rd comparer, and the output terminal of the first not gate is connected the second Sheffer stroke gate with the output terminal of described first Sheffer stroke gate; Logical relation decision circuitry is used for when the accumulator voltage that nominal voltage is 12V is less than 12V, or when the accumulator voltage that nominal voltage is 24V is less than 24V, the output terminal of logical relation decision circuitry exports high level, when the accumulator voltage that nominal voltage is 12V is greater than 12V, or when the accumulator voltage that nominal voltage is 24V is greater than 24V, the output terminal output low level of logical relation decision circuitry;
Described on-off circuit is the first triode, the base stage of the first triode connects the output terminal of described second Sheffer stroke gate by the 11 resistance, the collector of the first triode connects VCC, the emitter of the first triode connects the input end of flicker warning circuit, emitter and the collector conducting of the first triode when the second Sheffer stroke gate exports high level, the emitter output high level of the first triode;
Described flicker warning circuit comprises the second triode and the 3rd triode, the base stage of the second triode connects the emitter of described first triode by the 14 resistance, the collector of the second triode by connecting the emitter of the first triode described in the 12 resistance, the second transistor emitter ground connection; The base stage of the 3rd triode connects the emitter of described first triode by the 13 resistance, the collector of the 3rd triode is connected the emitter of described first triode by light emitting diode and the 15 resistance, the 3rd transistor emitter ground connection; Be connected with the first electric capacity between the base stage of described second triode and the collector of the 3rd triode, between the collector of described second triode and the base stage of the 3rd triode, be connected with the second electric capacity; When the second triode cut-off, the 3rd triode ON, LED operation, when the second triode ON, the 3rd triode cut-off, light emitting diode does not work, and realizes light emitting diode alternation and idle flicker warning with this.
2. accumulator short of electricity warning device as claimed in claim 1, it is characterized in that: the output terminal of described first comparer connects the positive pole that voltage stabilizing value is second voltage stabilizing diode of 5V, the output terminal of the second comparer connects the positive pole that voltage stabilizing value is the 3rd voltage stabilizing diode of 5V, and the output terminal of the 3rd comparer connects the positive pole that voltage stabilizing value is the 4th voltage stabilizing diode of 5V.
3. accumulator short of electricity warning device as claimed in claim 2, it is characterized in that: described 12 resistance and the 15 resistance are 1k Ω, and the 13 resistance and the 14 resistance are 100k Ω, the first electric capacity and the second electric capacity are 10nF.
4. the accumulator short of electricity warning device as described in one of claim 1-3, is characterized in that: described first comparer, the second comparer, the 3rd comparer adopt chip LM393P.
5. the accumulator short of electricity warning device as described in one of claim 1-3, is characterized in that: described first not gate and the second not gate adopt chip 74LS04N, and described first Sheffer stroke gate and the second Sheffer stroke gate adopt chip 74LS00D.
6. the accumulator short of electricity warning device as described in one of claim 1-3, is characterized in that: described VCC is 9V.
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| CN201520100918.3U CN204405810U (en) | 2015-02-12 | 2015-02-12 | Accumulator short of electricity warning device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107477810A (en) * | 2017-09-20 | 2017-12-15 | 广西中投创新能源科技股份有限公司 | Wireless door and window combined control equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107477810A (en) * | 2017-09-20 | 2017-12-15 | 广西中投创新能源科技股份有限公司 | Wireless door and window combined control equipment |
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