CN202661534U - Novel voltage detector - Google Patents
Novel voltage detector Download PDFInfo
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- CN202661534U CN202661534U CN2012203632870U CN201220363287U CN202661534U CN 202661534 U CN202661534 U CN 202661534U CN 2012203632870 U CN2012203632870 U CN 2012203632870U CN 201220363287 U CN201220363287 U CN 201220363287U CN 202661534 U CN202661534 U CN 202661534U
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Abstract
The utility model relates to a novel voltage detector which comprises a comparison circuit, a reference power supply circuit and a signal isolation circuit. To-be-detected input voltage is outputted to reference voltage after passing through the reference power supply circuit and is compared with the reference voltage through the comparison circuit, and a detection result is given through a signal isolation circuit. The novel voltage detector provided by the utility model has the advantages of simple circuit structure, cheap price, good reliability, and convenience and reliability in parameter adjustment.
Description
Technical field
The utility model relates to a kind of novel voltage-level detector, is applicable to all kinds DC voltage and detects.
Background technology
Along with a large amount of opertaing device and the very high consumer of automaticity based on computer system come into operation in succession, the industrial user is more and more higher to the requirement of the quality of power supply, even part second the undesired huge loss that just can cause.According to statistics, the industrial user that automaticity is very high will suffer 10～50 interference relevant with power quality problem general every year, and the accident number that wherein causes because of the dynamic voltage quality problem that comprises voltage fluctuation and flickering accounts for 83% of total number of accident.Voltage fluctuation and flickering have become the one of the main reasons that threatens many responsible consumer power supply reliabilities, must effectively monitor and suppress it.Although integrated voltage-level detector respectively has characteristics in the market, for certain specific area or specific voltage, at aspects such as reference voltage detections perfect not to the utmost place is arranged also often, and also often expensive.
The utility model content
The utility model provides a kind of for above problem can adjust the novel voltage detecting device that detects voltage range, has defencive function flexibly.
Provide a kind of novel voltage-level detector in order to overcome the above problems the utility model, it is characterized in that: comprise comparator circuit, reference power circuit and signal isolation circuit, detect input voltage and behind reference power circuit, output to reference voltage, detect input voltage and reference voltage and compare through comparator circuit, and provide testing result by signal isolation circuit.
Described reference power circuit comprises resistance R 1, chip N1, capacitor C 1, capacitor C 2, capacitor C 3; Detecting input voltage PVin is connected with an end of resistance R 1, the other end 1 of resistance R 1 is connected with the REF utmost point of the C utmost point of chip N1, chip N1, the anode of capacitor C 1, the anode of capacitor C 2, the anode of capacitor C 3, and the negative terminal of the A utmost point of chip N1, the negative terminal of capacitor C 1, capacitor C 2, the negative terminal of capacitor C 3 are connected with the PGND of input power.
Described comparator circuit comprises R2, chip N2, resistance R 3, capacitor C 4, resistance R 4, resistance R 5, resistance R 6, diode D1; Detect input voltage PVin and resistance R 2,8 pin of chip N2 are connected, one end of the other end of resistance R 2 and resistance R 3, the anode of capacitor C 4, one end of resistance R 4 is connected, the other end of resistance R 4 is connected with 2 pin of chip N2, one end of resistance R 5 is connected with 2.5V reference voltage 1, one end of the other end of resistance R 5 and resistance R 6,3 pin of chip N2 are connected, the other end of resistance R 6 is connected with the anode of diode D1, the negative terminal of diode D1 triggers 2 with 1 pin of chip N2 with comparison signal and links to each other, and detects the negative terminal of input voltage PGND and capacitor C 4, the other end of resistance R 3,4 pin of chip N2 are connected.
Described signal isolation circuit comprises resistance R 7, optocoupler P1, resistance R 8, capacitor C 5; Detecting input voltage PVin is connected with an end of resistance R 7, the other end of resistance R 7 is connected with 1 pin of optocoupler P1, comparison signal triggers 2 and is connected with 2 pin of optocoupler P1, and 4 pin of optocoupler P1 are connected with power supply VCC, and 4 pin of optocoupler P1 are connected with the anode of an end of resistance R 8, capacitor C 5.
Described resistance R 1 is 1K Ω, and capacitor C 2 is 10 μ F, and capacitor C 1 is 0.1 μ F, and capacitor C 3 is 0.1 μ F, and N1 adopts TL431BCLP.
Described resistance R 2 is 9.1k Ω, and resistance R 3 is 2.2k Ω, and capacitor C 4 is 0.1 μ F, and resistance R 4 is 4.7k Ω, and resistance R 5 is 4.7k Ω, and resistance R 6 is 24k Ω,, N2 adopts LM293.
Described resistance R 7 is 4.7k Ω, and optocoupler P1 adopts P521, and resistance R 8 is 4.7k Ω, and capacitor C 5 is 0.1 μ F.
Beneficial effect:
The circuit structure that the utility model proposes is simple, low price, and good reliability, and also parameter adjustment is convenient, reliable.
Description of drawings
Fig. 1 is circuit structure theory diagram of the present utility model;
Fig. 2 reference power circuit structural drawing of the present utility model;
Fig. 3 is comparator circuit of the present utility model and signal isolation circuit structural drawing.
Embodiment
The utility model will be further described below in conjunction with accompanying drawing.
As shown in Figure 1,
The voltage-level detector that this is novelComprise comparator circuit, reference power circuit and signal isolation circuit.Through comparator circuit, the input voltage and the reference voltage that need to detect compare, and provide testing result by signal isolation circuit.
Reference power circuit
As shown in Figure 2, wherein 1 is the 2.5V reference voltage, detecting input voltage PVin is connected with an end of resistance R 1, the other end 1 of resistance R 1 is connected with the REF utmost point of the C utmost point of chip N1, chip N1, the anode of capacitor C 1, the anode of capacitor C 2, the anode of capacitor C 3, and the negative terminal of the A utmost point of chip N1, the negative terminal of capacitor C 1, capacitor C 2, the negative terminal of capacitor C 3 are connected with the PGND of input power.
Comparator circuit
As shown in Figure 3, wherein 2 are the comparison signal triggering, detect input voltage PVin and resistance R 2,8 pin of chip N2 are connected, one end of the other end of resistance R 2 and resistance R 3, the anode of capacitor C 4, one end of resistance R 4 is connected, the other end of resistance R 4 is connected with 2 pin of chip N2, one end of resistance R 5 is connected with 2.5V reference voltage 1, one end of the other end of resistance R 5 and resistance R 6,3 pin of chip N2 are connected, the other end of resistance R 6 is connected with the anode of diode D1, the negative terminal of diode D1 triggers 2 with 1 pin of chip N2 with comparison signal and links to each other, and detects the negative terminal of input voltage PGND and capacitor C 4, the other end of resistance R 3,4 pin of chip N2 are connected.
Signal isolation circuit
As shown in Figure 3, detecting input voltage PVin is connected with an end of resistance R 7, the other end of resistance R 7 is connected with 1 pin of optocoupler P1, comparison signal triggers 2 and is connected with 2 pin of optocoupler P1,4 pin of optocoupler P1 are connected with power supply VCC, and 4 pin of optocoupler P1 are connected with the anode of an end of resistance R 8, capacitor C 5.
Detection input voltage PVin enters chip N1 output reference voltage DC2.5V and output to 2.5V reference voltage 1 after C3 filtering after resistance R 1, capacitor C 2, capacitor C 1 filtering.Resistance R 1 is 1K Ω, and capacitor C 2 is 10 μ F, and capacitor C 1 is 0.1 μ F, and capacitor C 3 is 0.1 μ F, and N1 adopts TL431BCLP can very simply obtain accurately reference voltage DC2.5V in this way.
Detecting input voltage PVin compares to the reference voltage DC2.5V of 2 pin of N2 and process current-limiting resistance R5 by current-limiting resistance R4 by capacitor C 4 filtering through resistance R 2, resistance R 3 dividing potential drops.Resistance R 3 is 2.2k Ω, and resistance R 2 is 9.1k Ω, and resistance R 4 is 4.7k Ω, and resistance R 5 is 4.7k Ω, capacitor C 4 is 0.1 μ F, and resistance R 7 is 4.7k Ω, and resistance R 8 is 4.7k Ω, and capacitor C 5 is 0.1 Μ F, N2 adopts LM293, and optocoupler P1 adopts P521, and resistance R 6 is 24k Ω.
Detect input voltage PVin high voltage: detect when input voltage PVin is DC12.9V and work as the voltage of PVin through divider resistance PVin*R3/ (R2+R3)=2.51V, output to 2 pin of N2, compare with the 3 pin voltages of N2, be lower than the 1 pin output low level of N2 behind the 3 pin voltages of N2.Detect input voltage PVin and get through optocoupler P1 through resistance R 7.Detection signal PWFA exports VCC behind filter capacitor C5.
Detect input voltage PVin low-voltage: resistance R 6 and diode D1 form the return difference circuit, can regulate the 3 pin reference voltages of N2 by the resistance of regulating resistance R6 to reach the operation voltage of regulating the PVin low-voltage.When the voltage of PVin outputs to 2 pin of N2 behind divider resistance, compare with the 3 pin voltages of N2, be lower than the 1 pin output high level of N2 behind the 3 pin voltages of N2.Optocoupler P1 cut-off, detection signal PWFA exports GND behind pull down resistor R8, filter capacitor C5.
Detecting input voltage PVin is zero: 1 pin of N2 becomes high-impedance state, optocoupler P1 cut-off, and detection signal PWFA exports GND behind pull down resistor R8, filter capacitor C5.
The circuit of the utility model design is compared with other voltage-level detectors, has peripheral circuit simple, and cost is low, detects the advantages such as the easy adjustment of voltage.By the parameter of adjusting resistance, regulate to detect very easily magnitude of voltage, and adjustment that can very simple realization voltage back diffirence.
The above is preferred embodiment of the present utility model only, is not restricted to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the claim scope of the present utility model.
Claims (7)
1. novel voltage-level detector, it is characterized in that: comprise comparator circuit, reference power circuit and signal isolation circuit, detect input voltage and behind reference power circuit, output to reference voltage, detect input voltage and reference voltage and compare through comparator circuit, and provide testing result by signal isolation circuit.
2. a kind of novel voltage-level detector according to claim 1, it is characterized in that: described reference power circuit comprises resistance R 1, chip N1, capacitor C 1, capacitor C 2, capacitor C 3;
Detecting input voltage PVin is connected with an end of resistance R 1, the other end 1 of resistance R 1 is connected with the REF utmost point of the C utmost point of chip N1, chip N1, the anode of capacitor C 1, the anode of capacitor C 2, the anode of capacitor C 3, and the negative terminal of the A utmost point of chip N1, the negative terminal of capacitor C 1, capacitor C 2, the negative terminal of capacitor C 3 are connected with the PGND of input power.
3. a kind of novel voltage-level detector according to claim 1, it is characterized in that: described comparator circuit comprises R2, chip N2, resistance R 3, capacitor C 4, resistance R 4, resistance R 5, resistance R 6, diode D1;
Detect input voltage PVin and resistance R 2,8 pin of chip N2 are connected, one end of the other end of resistance R 2 and resistance R 3, the anode of capacitor C 4, one end of resistance R 4 is connected, the other end of resistance R 4 is connected with 2 pin of chip N2, one end of resistance R 5 is connected with 2.5V reference voltage 1, one end of the other end of resistance R 5 and resistance R 6,3 pin of chip N2 are connected, the other end of resistance R 6 is connected with the anode of diode D1, the negative terminal of diode D1 triggers 2 with 1 pin of chip N2 with comparison signal and links to each other, and detects the negative terminal of input voltage PGND and capacitor C 4, the other end of resistance R 3,4 pin of chip N2 are connected.
4. a kind of novel voltage-level detector according to claim 1, it is characterized in that: described signal isolation circuit comprises resistance R 7, optocoupler P1, resistance R 8, capacitor C 5;
Detecting input voltage PVin is connected with an end of resistance R 7, the other end of resistance R 7 is connected with 1 pin of optocoupler P1, comparison signal triggers 2 and is connected with 2 pin of optocoupler P1, and 4 pin of optocoupler P1 are connected with power supply VCC, and 4 pin of optocoupler P1 are connected with the anode of an end of resistance R 8, capacitor C 5.
5. a kind of novel voltage-level detector according to claim 2 is characterized in that: described resistance R 1 is 1K Ω, and capacitor C 2 is 10 μ F, and capacitor C 1 is 0.1 μ F, and capacitor C 3 is 0.1 μ F, and N1 adopts TL431BCLP.
6. a kind of novel voltage-level detector according to claim 3 is characterized in that: described resistance R 2 is 9.1k Ω, and resistance R 3 is 2.2k Ω, capacitor C 4 is 0.1 μ F, and resistance R 4 is 4.7k Ω, and resistance R 5 is 4.7k Ω, resistance R 6 is 24k Ω,, N2 adopts LM293.
7. a kind of novel voltage-level detector according to claim 4 is characterized in that: described resistance R 7 is 4.7k Ω, and optocoupler P1 adopts P521, and resistance R 8 is 4.7k Ω, and capacitor C 5 is 0.1 μ F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203632870U CN202661534U (en) | 2012-07-26 | 2012-07-26 | Novel voltage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203632870U CN202661534U (en) | 2012-07-26 | 2012-07-26 | Novel voltage detector |
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| CN202661534U true CN202661534U (en) | 2013-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012203632870U Expired - Lifetime CN202661534U (en) | 2012-07-26 | 2012-07-26 | Novel voltage detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105723617A (en) * | 2013-11-15 | 2016-06-29 | 旭化成微电子株式会社 | Voltage detector, method for setting baseline voltage, and program |
| WO2023050157A1 (en) * | 2021-09-29 | 2023-04-06 | Tridonic Gmbh & Co Kg | Voltage information detecting circuit, power supply circuit, driving circuit and voltage information detecting method |
-
2012
- 2012-07-26 CN CN2012203632870U patent/CN202661534U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105723617A (en) * | 2013-11-15 | 2016-06-29 | 旭化成微电子株式会社 | Voltage detector, method for setting baseline voltage, and program |
| CN105723617B (en) * | 2013-11-15 | 2018-07-31 | 旭化成微电子株式会社 | Voltage detector, reference voltage setting method and storage medium |
| WO2023050157A1 (en) * | 2021-09-29 | 2023-04-06 | Tridonic Gmbh & Co Kg | Voltage information detecting circuit, power supply circuit, driving circuit and voltage information detecting method |
| GB2624349A (en) * | 2021-09-29 | 2024-05-15 | Tridonic Gmbh & Co Kg | Voltage information detecting circuit, power supply circuit, driving circuit and voltage information detecting method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20130109 |