CN202166688U - Overvoltage acquisition circuit - Google Patents
Overvoltage acquisition circuit Download PDFInfo
- Publication number
- CN202166688U CN202166688U CN2011202128923U CN201120212892U CN202166688U CN 202166688 U CN202166688 U CN 202166688U CN 2011202128923 U CN2011202128923 U CN 2011202128923U CN 201120212892 U CN201120212892 U CN 201120212892U CN 202166688 U CN202166688 U CN 202166688U
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- Prior art keywords
- comparator
- voltage
- resistor
- acquisition circuit
- resistance
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Abstract
The utility model discloses an overvoltage acquisition circuit which includes a double-comparator. A sampling voltage signal passes the voltage transformation of a transformer and a rectifier bridge, and then a voltage dividing level is acquired after the sampling voltage signal passes a first resistor and a changeable resistor. The voltage dividing level is connected with a non-inverting input terminal of the double-comparator. A first working power supply acquires a fixed level after the voltage division by a third resistor and a fourth resistor which are equivalent in value. The fixed level is connected with an inverting input terminal of the double-comparator. A fifth resistor is connected between an output terminal and a first connecting terminal of the double-comparator. The output terminal of the double-comparator is connected with a one-chip-microcomputer. The overvoltage acquisition circuit can be applied to an occasion that the alternating voltage and the direct voltage can have changes.
Description
Technical field
The utility model relates to a kind of application circuit, concrete relates to a kind of overvoltage Acquisition Circuit.
Background technology
In the side circuit use occasion; We can not guarantee fully that all electric equipments work under rated voltage; When voltage surpasses the rated voltage electric equipment; Circuit is in overvoltage condition, and this moment, the electric equipment in the circuit will break down, so we must judge circuit and whether are in overvoltage condition.Overvoltage Acquisition Circuit in the existing circuit is varied of a great variety, but most complex structure, function is complicated; And only need under the application scenario of function singleness at some, adopt the driving circuit of complicated circuit construction to accomplish the signals collecting function of simple function often, cost can increase so on the one hand; In addition on the one hand; After circuit structure was in a single day complicated, its labile factor was behind so just reducing product percent of pass virtually also increasing.
The utility model content
For overcoming deficiency of the prior art, the purpose of the utility model is to provide a kind of overvoltage Acquisition Circuit simple in structure.
In order to solve the problems of the technologies described above, realize above-mentioned purpose, the utility model has adopted following technical scheme:
A kind of overvoltage Acquisition Circuit; Comprise dual comparator; Sampling voltage signal through behind transformer transformation, the rectifier bridge obtains one fen voltage level through first resistance, variable resistor; Said minute voltage level connects the in-phase input end of said dual comparator, obtains fixed level behind equivalent the 3rd resistance of first working power process, the 4th electric resistance partial pressure, and said fixed level connects the inverting input of said dual comparator; Be connected the 5th resistance between the output terminal of said dual comparator and first terminals, the output terminal of said dual comparator connects single-chip microcomputer.
The course of work of the overvoltage Acquisition Circuit of the utility model is following:
Said sampling voltage signal obtains the branch voltage level through first resistance and variable resistor; Said branch pressure voltage and said fixed level compare through said dual comparator, and the output signal of said dual comparator U1 judges through the signal that said single-chip microcomputer obtains saltus step whether said sampling voltage is in overvoltage condition.
The utlity model has following advantage:
The overvoltage Acquisition Circuit of the utility model simple in structure, easy to use.
Above-mentioned explanation only is the general introduction of the utility model technical scheme, in order more to know the technological means of understanding the utility model, and can implement according to the content of instructions, below with the preferred embodiment of the utility model and conjunction with figs. specify as after.The embodiment of the utility model is provided by following examples and accompanying drawing thereof in detail.
Description of drawings
Fig. 1 is the circuit theory diagrams of the overvoltage Acquisition Circuit of the utility model.
Label declaration among the figure: 1, first terminals.
Embodiment
Below in conjunction with accompanying drawing and embodiment the technology implementation process of the utility model is further specified.
Referring to shown in Figure 1; A kind of overvoltage Acquisition Circuit; Comprise dual comparator U1, obtain one fen voltage level V4 through the sampling voltage signal VOL-SAM behind transformer transformation, the rectifier bridge through first resistance R 1, variable resistor R2, said minute voltage level V4 connects the in-phase input end of said dual comparator U1; The first working power V1 obtains fixed level V3 after through equivalent the 3rd resistance R 3, the 4th resistance R 4 dividing potential drops, and said fixed level V3 connects the inverting input of said dual comparator U1; Be connected the 5th resistance R 5 between the output terminal of said dual comparator U1 and first terminals, the output terminal of said dual comparator U1 connects single-chip microcomputer P1.
The foregoing description is technical conceive and the characteristics for the utility model is described just, its objective is to be the content that lets the one of ordinary skilled in the art can understand the utility model and to implement according to this, can not limit the protection domain of the utility model with this.The variation or the modification of every equivalence of having done according to the essence of the utility model content all should be encompassed in the protection domain of the utility model.
Claims (1)
1. overvoltage Acquisition Circuit; Comprise dual comparator (U1); It is characterized in that: the sampling voltage signal (VOL-SAM) through behind transformer transformation, the rectifier bridge obtains one fen voltage level (V4) through first resistance (R1), variable resistor (R2); Said minute voltage level (V4) connect the in-phase input end of said dual comparator (U1); Obtain fixed level (V3) after equivalent the 3rd resistance of first working power (V1) process, the 4th resistance (R3, the R4) dividing potential drop, said fixed level (V3) connects the inverting input of said dual comparator (U1); Be connected the 5th resistance (R5) between the output terminal of said dual comparator (U1) and first terminals, the output terminal of said dual comparator (U1) connects single-chip microcomputer (P1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202128923U CN202166688U (en) | 2011-06-22 | 2011-06-22 | Overvoltage acquisition circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202128923U CN202166688U (en) | 2011-06-22 | 2011-06-22 | Overvoltage acquisition circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202166688U true CN202166688U (en) | 2012-03-14 |
Family
ID=45802505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202128923U Expired - Fee Related CN202166688U (en) | 2011-06-22 | 2011-06-22 | Overvoltage acquisition circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202166688U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102799114A (en) * | 2012-08-23 | 2012-11-28 | 北京经纬恒润科技有限公司 | Signal conditioning equipment |
| CN104101773A (en) * | 2014-07-28 | 2014-10-15 | 四川通源电力科技有限公司 | Electrical power system transient overvoltage acquisition system |
-
2011
- 2011-06-22 CN CN2011202128923U patent/CN202166688U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102799114A (en) * | 2012-08-23 | 2012-11-28 | 北京经纬恒润科技有限公司 | Signal conditioning equipment |
| CN104101773A (en) * | 2014-07-28 | 2014-10-15 | 四川通源电力科技有限公司 | Electrical power system transient overvoltage acquisition system |
| CN104101773B (en) * | 2014-07-28 | 2017-01-18 | 四川通源电力科技有限公司 | Electrical power system transient overvoltage acquisition system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120314 Termination date: 20120622 |