CN102495658B - Adjustable DC (direct current) power supply monitoring module - Google Patents
Adjustable DC (direct current) power supply monitoring module Download PDFInfo
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- CN102495658B CN102495658B CN 201110409475 CN201110409475A CN102495658B CN 102495658 B CN102495658 B CN 102495658B CN 201110409475 CN201110409475 CN 201110409475 CN 201110409475 A CN201110409475 A CN 201110409475A CN 102495658 B CN102495658 B CN 102495658B
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Abstract
The invention discloses an adjustable high-precision DC (direct current) power supply monitoring module which comprises a power supply monitoring comparison circuit and a relay execution circuit. The adjustable high-precision DC power supply monitoring module is characterized in that: the power supply monitoring comparison circuit is composed of a voltage lower limit monitoring circuit module (A) and a voltage upper limit monitoring circuit module (B); and each of the voltage lower limit monitoring circuit module (A) and the voltage upper limit monitoring circuit module (B) comprises a voltage division acquisition module, a reference voltage output module and a voltage comparison output module. The adjustable high-precision DC power supply monitoring module disclosed by the invention has the advantages that: the power supply voltage monitoring value is adjustable, the operation mode is simple, and other voltage power supply and external auxiliary circuits are not needed. When the power supply voltage is within an effective range, the voltage power supply is automatically connected; otherwise, the voltage power supply is automatically cut off. Compared with the prior art, the adjustable high-precision DC power supply monitoring module disclosed by the invention can meet stricter using requirements and has the advantages of simpler circuit and higher reliability.
Description
Technical field
The present invention relates to a kind of adjustable DC power supply monitoring module, belong to supply voltage supervisory circuit technical field.
Background technology
In numerous circuit design, usually need supply voltage is monitored, that is: when supply voltage in effective range when (higher than lower limit and lower than higher limit), power voltage supply is connected automatically; When supply voltage, outside effective range when (higher than higher limit or lower than lower limit), power voltage supply is by automatic cutout.In prior art, voltage monitoring circuit adopts the mode of single-chip microcomputer+sample circuit+relay to realize usually, and the shortcoming of such circuit is the circuit complexity, and single-chip microcomputer is subject to external interference, and reliability is lower.For some high-precision requirement, the equipment that reliability requirement is high, can't meet higher requirement.
Summary of the invention
The object of the invention is to, a kind of adjustable DC power supply monitoring module is provided.Reliability is high, can online programming, revise the time delay control time.
Technical scheme of the present invention.Adjustable DC power supply monitoring module, comprise power supply monitoring comparator circuit and relay executive circuit, described power supply monitoring comparator circuit is by lower voltage limit supervisory circuit module and upper voltage limit supervisory circuit module composition, and the structure of lower voltage limit supervisory circuit module and upper voltage limit supervisory circuit module comprises that respectively voltage dividing potential drop acquisition module, reference voltage output module and voltage ratio are than output module.
Above-mentioned adjustable DC power supply monitoring module, the module structure of described lower voltage limit supervisory circuit comprises supply module, series connection the first resistance, the second resistance and the first potentiometer between the both positive and negative polarity of supply module, connect the anode of the 3rd resistance to the first voltage comparator between the first resistance, the second resistance; The supply module both positive and negative polarity is connected with the input positive and negative terminal of reference voltage chip respectively, and the reference voltage chip output is connected to the negative terminal of the first voltage comparator; Difference the first electric capacity in parallel, the second electric capacity between the positive and negative terminal of the first voltage comparator and supply module negative pole; The anode of the first voltage comparator and output terminal the first feedback resistance in parallel; Output terminal series winding the 4th resistance of the first voltage comparator is to the supply module positive pole, and output terminal Opposite direction connection first voltage stabilizing diode of the first voltage comparator is on the base stage of the first triode simultaneously; The collector of the first triode is connected to the first relay coil negative terminal, and the first relay coil anode is connected to the supply module positive pole; The positive and negative end of the first Transient Suppression Diode is connected respectively to the negative, positive end of the first relay coil; The 3rd electric capacity in parallel between the base stage of the first triode and emitter, the emitter of the first triode is connected on the supply module negative pole;
The module structure of described upper voltage limit supervisory circuit comprises supply module, and series connection the 5th resistance, the 6th resistance and the second potentiometer between the both positive and negative polarity of supply module, connect the anode of the 7th resistance to the second voltage comparer between the 5th resistance, the 6th resistance; The supply module both positive and negative polarity is connected with the input positive and negative terminal of reference voltage chip respectively, and the reference voltage chip output is connected to the negative terminal of second voltage comparer; The 4th electric capacity respectively in parallel, the 5th electric capacity between the positive and negative terminal of second voltage comparer and supply module negative pole; The anode of second voltage comparer and output terminal the second feedback resistance in parallel; Output terminal series winding the 8th resistance of second voltage comparer is to the supply module positive pole, and output terminal Opposite direction connection second voltage stabilizing diode of second voltage comparer is on the base stage of the second triode simultaneously; The collector of the second triode is connected to the second relay coil negative terminal, and the second relay coil anode is connected to the supply module positive pole; The positive and negative end of the second Transient Suppression Diode is connected respectively to the negative, positive end of the second relay coil; The 6th electric capacity in parallel between the base stage of the second triode and emitter, the emitter of the second triode is connected on the supply module negative pole;
The anodal common port that connects the first relay contact of supply module, the Chang Kaiduan of the first relay is connected with the common port of the second relay contact, the normal-closed end of the second relay contact is connected to the positive pole of relay executive circuit supply module, and relay executive circuit supply module negative pole and supply module are altogether.
Advantage of the present invention has: supply voltage monitoring value is adjustable; Mode of operation is simple, without other power voltage supply and additional auxiliary circuit.When supply voltage is in effective range, power voltage supply is connected automatically; On the contrary, power voltage supply is by automatic cutout.The present invention compared with the existing technology, can meet stricter request for utilization, and circuit is simpler, better reliability.
The accompanying drawing explanation
Accompanying drawing 1 is circuit theory diagrams of the present invention.
Embodiment
Embodiments of the invention.Adjustable DC power supply monitoring module, as shown in Figure 1, adjustable DC power supply monitoring module, comprise power supply monitoring comparator circuit and relay executive circuit, described power supply monitoring comparator circuit consists of lower voltage limit supervisory circuit modules A and upper voltage limit supervisory circuit module B, and the structure of lower voltage limit supervisory circuit modules A and upper voltage limit supervisory circuit module B comprises that respectively voltage dividing potential drop acquisition module, reference voltage output module and voltage ratio are than output module.
Lower voltage limit supervisory circuit modules A structure comprises supply module 1, connects the anode of the 3rd resistance 8 to first voltage comparators 13 between the both positive and negative polarity of supply module 1 between series connection the first resistance 6, the second resistance 7 and the first potentiometer 3, the first resistance 6, the second resistance 7; Supply module 1 both positive and negative polarity is connected with the input positive and negative terminal of reference voltage chip 9 respectively, and reference voltage chip 9 output terminals are connected to the negative terminal of the first voltage comparator 13; Difference the first electric capacity 11 in parallel, the second electric capacity 12 between the positive and negative terminal of the first voltage comparator 13 and supply module 1 negative pole; The anode of the first voltage comparator 13 and output terminal the first feedback resistance 10 in parallel; Output terminal series winding the 4th resistance 14 of the first voltage comparator 13 is to supply module 1 positive pole, simultaneously on the base stage of output terminal Opposite direction connection first voltage stabilizing diode 17 to first triodes 19 of the first voltage comparator 13; The collector of the first triode 19 is connected to the first relay 16 coil negative terminals, and the first relay 16 coil anodes are connected to supply module 1 positive pole; The positive and negative end of the first Transient Suppression Diode 15 is connected respectively to the negative, positive end of the first relay 16 coils; Between the base stage of the first triode 19 and emitter, the emitter of the 3rd electric capacity 18, the first triodes 19 in parallel is connected on supply module 1 negative pole;
Described upper voltage limit supervisory circuit module B structure comprises supply module 1, connect the anode of the 7th resistance 22 to second voltage comparer 26 between the both positive and negative polarity of supply module 1 between series connection the 5th resistance 20, the 6th resistance 21 and the second potentiometer 4, the five resistance 20, the 6th resistance 21; Supply module 1 both positive and negative polarity is connected with the input positive and negative terminal of reference voltage chip 9 respectively, and reference voltage chip 9 output terminals are connected to the negative terminal of second voltage comparer 26; The 4th electric capacity 24 respectively in parallel, the 5th electric capacity 25 between the positive and negative terminal of second voltage comparer 26 and supply module 1 negative pole; The anode of second voltage comparer 26 and output terminal the second feedback resistance 23 in parallel; Output terminal series winding the 8th resistance 27 of second voltage comparer 26 is to supply module 1 positive pole, simultaneously on the base stage of output terminal Opposite direction connection second voltage stabilizing diode 30 to second triodes 32 of second voltage comparer 26; The collector of the second triode 32 is connected to the second relay 29 coil negative terminals, and the second relay 29 coil anodes are connected to supply module 1 positive pole; The positive and negative end of the second Transient Suppression Diode 28 is connected respectively to the negative, positive end of the second relay 29 coils; Between the base stage of the second triode 32 and emitter, the emitter of the 6th electric capacity 31, the second triodes 32 in parallel is connected on supply module 1 negative pole;
The anodal common port that connects the first relay 16 contacts of supply module 1, the Chang Kaiduan of the first relay 16 is connected with the common port of the second relay 29 contacts, the normal-closed end of the second relay 29 contacts is connected to the positive pole of relay executive circuit supply module 5, and relay executive circuit supply module 5 negative poles and supply module 1 are altogether.
The monitoring principle is as follows: setting reference voltage chip 9 output reference voltages is V0, the first potentiometer 3 of regulation voltage lower limit supervisory circuit modules A, and power supply monitoring lower limit V1=V0 * (R6+R7+R3)/(R7+R3).Supply voltage V2 when supply module 1 > during V1, the first voltage comparator 13 output terminal OC open circuit, supply module 1 positive pole, the 4th resistance 14, the first voltage stabilizing diode 17, triode 19 and supply module 1 negative pole form loop, the first relay 16 work, the contact adhesive, supply module 1 outputs to electrical equipment executive circuit supply module 5.On the contrary, when V2<V1, the first voltage comparator 13 output terminal OC short circuits, triode 19 cut-offs, the first relay 16 is not worked, and contact discharges, and the power supply of supply module 1 output is cut off.
In like manner, the second potentiometer 4 of regulation voltage upper limit supervisory circuit module B, setting power supply monitoring higher limit V3=V0 * (R20+R21+R4)/(R21+R4).As V2 > during V3, second voltage comparer 26 output terminal OC open circuit, the second relay 29 work, the contact adhesive, cut off the power supply of power supply 33 output.On the contrary, when V2<V3, the 26 output terminal OC short circuits of second voltage comparer, the second relay 29 is not worked, and contact discharges, and supply module 1 outputs to feed circuit 5.
So far, the present invention completes power supply monitoring.Simultaneously, from power supply monitoring value formula, the precision of power supply monitoring value is consistent with the precision of reference voltage chip, so this module has the precision characteristic of reference voltage chip 9.
In lower voltage limit supervisory circuit modules A, voltage dividing potential drop acquisition module mainly consists of the first resistance 6, the second resistance 7 and the first potentiometer 3, the reference voltage output module is reference voltage chip 9, voltage ratio than output module mainly by the first voltage comparator 13 and the first triode 19 practical functions.
In upper voltage limit supervisory circuit module B, voltage dividing potential drop acquisition module mainly consists of the 5th resistance 20, the 6th resistance 21 and the second potentiometer 4, the reference voltage output module is reference voltage chip 9, voltage ratio than output module mainly by second voltage comparer 26 and the second triode 32 practical functions.
The present invention can reach the purpose of regulation voltage monitoring value by regulator potentiometer, supply voltage compares (be equivalent to supply voltage and the voltage monitoring value compares) after electric resistance partial pressure with reference voltage value, adhesive according to comparative result by the triode pilot relay discharges, complete the break-make of controlling supply voltage, thereby reach the purpose of monitoring voltage.When adopting voltage monitoring module described in the present invention, must first set the input supply voltage and equal the voltage monitoring value, by regulating the partial pressure potential device, make the mode of the lucky output of voltage carry out setting voltage monitoring value.
Claims (1)
1. an adjustable DC power supply monitoring module, comprise power supply monitoring comparator circuit and relay executive circuit, it is characterized in that: described power supply monitoring comparator circuit consists of lower voltage limit supervisory circuit module (A) and upper voltage limit supervisory circuit module (B), and the structure of lower voltage limit supervisory circuit module (A) and upper voltage limit supervisory circuit module (B) comprises that respectively voltage dividing potential drop acquisition module, reference voltage output module and voltage ratio are than output module;
Described lower voltage limit supervisory circuit module (A) structure comprises supply module (1), series connection the first resistance (6), the second resistance (7) and the first potentiometer (3) between the both positive and negative polarity of supply module (1), connect the anode of the 3rd resistance (8) to the first voltage comparator (13) between the first resistance (6), the second resistance (7); Supply module (1) both positive and negative polarity is connected with the input positive and negative terminal of reference voltage chip (9) respectively, and reference voltage chip (9) output terminal is connected to the negative terminal of the first voltage comparator (13); Difference the first electric capacity in parallel (11), the second electric capacity (12) between the positive and negative terminal of the first voltage comparator (13) and supply module (1) negative pole; The anode of the first voltage comparator (13) and output terminal the first feedback resistance (10) in parallel; Output terminal series winding the 4th resistance (14) of the first voltage comparator (13) is to supply module (1) positive pole, and output terminal Opposite direction connection first voltage stabilizing diode (17) of the first voltage comparator (13) is on the base stage of the first triode (19) simultaneously; The collector of the first triode (19) is connected to the first relay (16) coil negative terminal, and the first relay (16) coil anode is connected to supply module (1) positive pole; The positive and negative end of the first Transient Suppression Diode (15) is connected respectively to the negative, positive end of the first relay (16) coil; The 3rd electric capacity (18) in parallel between the base stage of the first triode (19) and emitter, the emitter of the first triode (19) is connected on supply module (1) negative pole;
Described upper voltage limit supervisory circuit module (B) structure comprises supply module (1), series connection the 5th resistance (20), the 6th resistance (21) and the second potentiometer (4) between the both positive and negative polarity of supply module (1), connect the anode of the 7th resistance (22) to second voltage comparer (26) between the 5th resistance (20), the 6th resistance (21); Supply module (1) both positive and negative polarity is connected with the input positive and negative terminal of reference voltage chip (9) respectively, and reference voltage chip (9) output terminal is connected to the negative terminal of second voltage comparer (26); The 4th electric capacity (24) respectively in parallel, the 5th electric capacity (25) between the positive and negative terminal of second voltage comparer (26) and supply module (1) negative pole; The anode of second voltage comparer (26) and output terminal the second feedback resistance (23) in parallel; Output terminal series winding the 8th resistance (27) of second voltage comparer (26) is to supply module (1) positive pole, and output terminal Opposite direction connection second voltage stabilizing diode (30) of second voltage comparer (26) is on the base stage of the second triode (32) simultaneously; The collector of the second triode (30) is connected to the second relay (29) coil negative terminal, and the second relay (29) coil anode is connected to supply module (1) positive pole; The positive and negative end of the second Transient Suppression Diode (28) is connected respectively to the negative, positive end of the second relay (29) coil; The 6th electric capacity (31) in parallel between the base stage of the second triode (32) and emitter, the emitter of the second triode (32) is connected on supply module (1) negative pole;
The anodal common port that connects the first relay (16) contact of supply module (1), the Chang Kaiduan of the first relay (16) is connected with the common port of the second relay (29) contact, the normal-closed end of the second relay (29) contact is connected to the positive pole of relay executive circuit supply module (5), and relay executive circuit supply module (5) negative pole and supply module (1) are altogether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110409475 CN102495658B (en) | 2011-12-09 | 2011-12-09 | Adjustable DC (direct current) power supply monitoring module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110409475 CN102495658B (en) | 2011-12-09 | 2011-12-09 | Adjustable DC (direct current) power supply monitoring module |
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| CN102495658A CN102495658A (en) | 2012-06-13 |
| CN102495658B true CN102495658B (en) | 2013-12-18 |
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| CN 201110409475 Expired - Fee Related CN102495658B (en) | 2011-12-09 | 2011-12-09 | Adjustable DC (direct current) power supply monitoring module |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6122720B2 (en) * | 2013-07-17 | 2017-04-26 | ルネサスエレクトロニクス株式会社 | Power supply voltage transition verification circuit, power supply voltage transition verification method, and semiconductor integrated circuit |
| CN104635829B (en) * | 2014-12-30 | 2019-04-26 | 展讯通信（上海）有限公司 | Power-switching circuit and voltage conversion method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002312043A (en) * | 2001-04-10 | 2002-10-25 | Ricoh Co Ltd | Voltage regulator |
| CN2876858Y (en) * | 2005-09-13 | 2007-03-07 | 圆创科技股份有限公司 | Linear voltage regulator |
| US7199565B1 (en) * | 2006-04-18 | 2007-04-03 | Atmel Corporation | Low-dropout voltage regulator with a voltage slew rate efficient transient response boost circuit |
| KR101530085B1 (en) * | 2008-12-24 | 2015-06-18 | 테세라 어드밴스드 테크놀로지스, 인크. | Low-Dropout Voltage regulator, and operating method of the regulator |
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