CN203705526U - Voltage polarity judgment circuit and system - Google Patents
Voltage polarity judgment circuit and system Download PDFInfo
- Publication number
- CN203705526U CN203705526U CN201420084294.6U CN201420084294U CN203705526U CN 203705526 U CN203705526 U CN 203705526U CN 201420084294 U CN201420084294 U CN 201420084294U CN 203705526 U CN203705526 U CN 203705526U
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- voltage
- diode
- polarity
- module
- resistance
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- 238000013461 design Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Abstract
The utility model discloses a voltage polarity judgment circuit. According to the voltage polarity judgment circuit, an NPN type triode is adopted as a core device, and diodes, resistors and a DC power supply are adopted as auxiliary devices. With the voltage polarity judgment circuit adopted, detection on voltage in a large range and driving of high power devices can be realized. The voltage polarity judgment circuit is advantageous in simplicity and low cost. The voltage polarity judgment circuit of the utility model includes an input end Vin, and output end Vout, a diode D1, a diode D2, a diode D3, a diode D4, a resistor R1, a resistor R2, an NPN type triode Q1 and a DC power supply. A voltage polarity judgment system provided by the utility model includes a voltage module to be tested, a voltage polarity judging module, a power supplying module and a back-stage circuit module.
Description
Technical field
The utility model relates to electronic circuit field, relates in particular to a kind of polarity of voltage decision circuitry and system.
Background technology
The principle of electronic load is to control internal power MOSFET or transistorized conducting amount, consumes the equipment of electric energy by the dissipated power of power tube, and it can accurately detect load voltage, accurate adjustment load current.Research and development, the production run of power supply all be unable to do without electronic load, and in order to prevent misoperation, electronic load not only will possess the self-protection in the time of access voltage reversal, also will possess alarm function, for reminding operator.
Detect the whether correct circuit of input voltage polarity for realizing at present, major part all adopts comparator circuit.For example to judge the voltage that the relative B of A point is ordered, A point and B point are received respectively to two input ends of comparer, again in conjunction with the connection of input end and the level of output terminal, can judge voltage that the relative B of A point orders for just or negative, this method for detection of input voltage polarity is comparatively ripe.
But this method is because comparer own characteristic has following defect:
1, comparator circuit just can not detect the voltage that exceedes the withstand voltage scope of comparer, and the withstand voltage scope of comparer is smaller, thereby comparator circuit is difficult to be applied in high pressure occasion;
2, the current driving ability of comparer is limited, in the time of the alarm units such as demand motive hummer, may need to set up driving circuit because driving force is not enough, and this not only can increase the complexity of comparator circuit, also can directly strengthen the cost of comparator circuit;
3, the method for comparer realize circuit price, comparatively complicated.
Utility model content
The utility model discloses a kind of polarity of voltage decision circuitry and system, utilize taking NPN type triode as core devices, diode, resistance and direct supply are the polarity of voltage decision circuitry of additional device, can realize the detection of voltage in a big way and the driving of high power device, and circuit is simple, with low cost.
Micro-control unit (Micro Control Unit, MCU), claim again one chip microcomputer or single-chip microcomputer, refer to appearance and development thereof along with large scale integrated circuit, by the CPU of computing machine, RAM, ROM, timer conter and multiple I/O Interface integration on a slice chip, the computing machine of the chip-scale of formation.
The polarity of voltage decision circuitry that the utility model provides, comprises input end V
in, output terminal V
out, diode D
1, diode D
2, diode D
3, diode D
4, resistance R
1, resistance R
2, NPN type triode Q
1and direct supply DC;
Described input end V
inpositive pole and described diode D
1negative pole be connected, described diode D
1positive pole and described diode D
2negative pole be connected, described diode D
2positive pole and described diode D
3positive pole and resistance R
1be connected, described diode D
3negative pole and described NPN type triode Q
1base stage be connected, described NPN type triode Q
1collector and described resistance R
2and described output terminal V
outpositive pole be connected, described NPN type triode Q
1emitter and described diode D
4positive pole be connected, the positive pole of described direct supply DC and described resistance R
1and described resistance R
2be connected, described diode D
4negative pole, described input end V
innegative pole, described output terminal V
outnegative pole and the minus earth of described direct supply DC.
Alternatively,
Described resistance R
1, described resistance R
2, described NPN type triode Q
1, and the design parameter of described direct supply DC according to described output terminal V
outoutput require determine.
Alternatively,
Described output terminal V
outbe connected with the EN pin of prompting module or IC or the IO mouth of MCU.
Alternatively,
Described prompting module comprises hummer and/or LED light.
The polarity of voltage that the utility model provides judges system, comprises voltage module to be measured, polarity of voltage judge module, supply module and late-class circuit module;
Described polarity of voltage judge module is above-mentioned polarity of voltage decision circuitry;
The input end V of described voltage module to be measured and described polarity of voltage decision circuitry
inbe connected;
The output terminal V of described late-class circuit module and described polarity of voltage decision circuitry
outbe connected;
Described polarity of voltage judge module is connected with described supply module.
Polarity of voltage decision circuitry of the present utility model and system have advantages of following:
1, withstand voltage higher due to diode, therefore polarity of voltage decision circuitry of the present utility model can be in the work of high pressure occasion, and by diode D
1, diode D
2, diode D
3, diode D
4adjustment combination, can obtain different withstand voltage scopes, and then can determine input end V
involtage range, can adapt to the demand of different occasions;
2, output terminal V
outoutput voltage, output current can pass through the different resistance R of Selecting All Parameters
1, resistance R
2, NPN type triode Q
1, and direct supply DC regulate, can meet the demand of different late-class circuits;
3, the existence of direct supply DC, makes output terminal V
outdriving force stronger, can directly drive high power device, and save driving circuit section;
4, the device of the utility model circuit is less, and circuit is simple, and cost of manufacture is comparatively cheap.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the connection diagram of the utility model polarity of voltage decision circuitry;
Fig. 2 is the structural representation that the utility model polarity of voltage judges system.
Embodiment
The utility model discloses a kind of polarity of voltage decision circuitry and system, utilize taking NPN type triode as core devices, diode, resistance and direct supply are the polarity of voltage decision circuitry of additional device, can realize the detection of voltage in a big way and the driving of high power device, and circuit is simple, with low cost.
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is known and detailed description, obviously, described embodiment is only a part of embodiment of the present utility model, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making all other embodiment that obtain under creative work prerequisite, all belong to the scope of the utility model protection.Refer to Fig. 1, the polarity of voltage decision circuitry of the utility model embodiment comprises input end V
in, output terminal V
out, diode D
1, diode D
2, diode D
3, diode D
4, resistance R
1, resistance R
2, NPN type triode Q
1and direct supply DC;
Described input end V
inpositive pole and described diode D
1negative pole be connected, described diode D
1positive pole and described diode D
2negative pole be connected, described diode D
2positive pole and described diode D
3positive pole and resistance R
1be connected, described diode D
3negative pole and described NPN type triode Q
1base stage be connected, described NPN type triode Q
1collector and described resistance R
2and described output terminal V
outpositive pole be connected, described NPN type triode Q
1emitter and described diode D
4positive pole be connected, the positive pole of described direct supply DC and described resistance R
1and described resistance R
2be connected, described diode D
4negative pole, described input end V
innegative pole, described output terminal V
outnegative pole and the minus earth of described direct supply DC.
When polarity of voltage decision circuitry work of the present utility model, comprise following two kinds of situations:
(1) polarity of input voltage to be judged and input end V
inpolarity consistent:
As polarity and the input end V of input voltage to be judged
inpolarity when consistent, that is the positive pole of input voltage to be judged is received input end V
inpositive pole, the negative pole of input voltage to be judged is received input end V
innegative pole.Now, diode D
1, diode D
2cut-off, diode D
3, diode D
4with NPN type triode Q
1conducting, output terminal V
outoutput low level, that is output terminal V
outpositive pole and negative pole between voltage very low, be equivalent to 0V.
(2) polarity of input voltage to be judged and input end V
inpolarity inconsistent:
As polarity and the input end V of input voltage to be judged
inpolarity when inconsistent, diode D
1, diode D
2conducting, diode D
3, diode D
4with NPN type triode Q
1cut-off, output terminal V
outoutput high level.Now output port voltage is very high, approaches the voltage of direct supply DC.
Alternatively,
Described resistance R
1, described resistance R
2, described NPN type triode Q
1, and the design parameter of described direct supply DC according to described output terminal V
outoutput require determine.
Output terminal V
outoutput voltage range and output current according to resistance R
1, resistance R
2, NPN type triode Q
1parameter determine, due to output terminal V
outrear end can comprise different late-class circuits, by the resistance R of different parameters
1, resistance R
2, NPN type triode Q
1combination can adapt to the demand of different late-class circuits, for example, in the time that late-class circuit is high power device, can obtains stronger driving force by increasing output voltage range and output current, thereby can directly drive high power device.
Alternatively,
Described output terminal V
outbe connected with the EN pin of prompting module or IC or the IO mouth of MCU.
Alternatively,
Described prompting module comprises hummer and/or LED light.
Polarity of voltage decision circuitry of the present utility model has advantages of following:
1, withstand voltage higher due to diode, therefore polarity of voltage decision circuitry of the present utility model can be in the work of high pressure occasion, and by diode D
1, diode D
2, diode D
3, diode D
4adjustment combination, can obtain different withstand voltage scopes, and then can determine input end V
involtage range, can adapt to the demand of different occasions;
2, output terminal V
outoutput voltage, output current can pass through the different resistance R of Selecting All Parameters
1, resistance R
2, NPN type triode Q
1, and direct supply DC regulate, can meet the demand of different late-class circuits;
3, the existence of direct supply DC, makes output terminal V
outdriving force stronger, can directly drive high power device, and save driving circuit section;
4, the device of the utility model circuit is less, and circuit is simple, and cost of manufacture is comparatively cheap.
More than introduce polarity of voltage decision circuitry of the present utility model, the polarity of voltage of introducing the utility model embodiment below judges system embodiment, refer to Fig. 2, polarity of voltage of the present utility model judges system, comprises voltage module 21 to be measured, polarity of voltage judge module 22, supply module 23 and late-class circuit module 24;
Described polarity of voltage judge module 22 is above-mentioned polarity of voltage decision circuitry;
The input end V of described voltage module to be measured 21 and described polarity of voltage decision circuitry
inbe connected;
The output terminal V of described late-class circuit module 24 and described polarity of voltage decision circuitry
outbe connected;
Described polarity of voltage judge module 22 is connected with described supply module 23.
When polarity of voltage of the present utility model judges system works, comprise following two kinds of situations:
(1) polarity that the polarity of voltage module 21 to be measured specifies with system is consistent:
When the polarity that specifies with system when the polarity of voltage module 21 to be measured is consistent, that is the positive input terminal of the system that just terminates to of voltage module 21 to be measured, the negative terminal of voltage module 21 to be measured is received the negative input end of system, now, and system output voltage port output low level.
(2) polarity that the polarity of voltage module 21 to be measured and system specify is inconsistent
When the polarity that specifies when polarity and the system of voltage module 21 to be measured is inconsistent, the voltage of system output voltage port is very high, approaches the supply voltage of system, so determine by the supply voltage of system how many output voltages specifically lies prostrate.
It should be noted that, above-mentioned late-class circuit module 24 is specifically as follows the prompting module of hummer and/or LED light composition.
Because polarity of voltage judge module 2 in the utility model polarity of voltage judgement system is identical with the structure of the utility model polarity of voltage decision circuitry, therefore polarity of voltage of the present utility model judges that system also should have identical technique effect, does not repeat them here.
Above a kind of polarity of voltage decision circuitry provided by the utility model and system are described in detail, for one of ordinary skill in the art, according to the thought of the utility model embodiment, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (5)
1. a polarity of voltage decision circuitry, is characterized in that, comprises input end V
in, output terminal V
out, diode D
1, diode D
2, diode D
3, diode D
4, resistance R
1, resistance R
2, NPN type triode Q
1and direct supply DC;
Described input end V
inpositive pole and described diode D
1negative pole be connected, described diode D
1positive pole and described diode D
2negative pole be connected, described diode D
2positive pole and described diode D
3positive pole and resistance R
1be connected, described diode D
3negative pole and described NPN type triode Q
1base stage be connected, described NPN type triode Q
1collector and described resistance R
2and described output terminal V
outpositive pole be connected, described NPN type triode Q
1emitter and described diode D
4positive pole be connected, the positive pole of described direct supply DC and described resistance R
1and described resistance R
2be connected, described diode D
4negative pole, described input end V
innegative pole, described output terminal V
outnegative pole and the minus earth of described direct supply DC.
2. polarity of voltage decision circuitry according to claim 1, is characterized in that, described resistance R
1, described resistance R
2, described NPN type triode Q
1, and the design parameter of described direct supply DC according to described output terminal V
outoutput require determine.
3. polarity of voltage decision circuitry according to claim 1, is characterized in that, described output terminal V
outbe connected with the EN pin of prompting module or IC or the IO mouth of MCU.
4. polarity of voltage decision circuitry according to claim 3, is characterized in that, described prompting module comprises hummer and/or LED light.
5. polarity of voltage judges a system, it is characterized in that, comprises voltage module to be measured, polarity of voltage judge module, supply module and late-class circuit module;
Described polarity of voltage judge module is the polarity of voltage decision circuitry described in any one in claim 1 to 4;
The input end V of described voltage module to be measured and described polarity of voltage decision circuitry
inbe connected;
The output terminal V of described late-class circuit module and described polarity of voltage decision circuitry
outbe connected;
Described polarity of voltage judge module is connected with described supply module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420084294.6U CN203705526U (en) | 2014-02-26 | 2014-02-26 | Voltage polarity judgment circuit and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420084294.6U CN203705526U (en) | 2014-02-26 | 2014-02-26 | Voltage polarity judgment circuit and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203705526U true CN203705526U (en) | 2014-07-09 |
Family
ID=51055946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420084294.6U Expired - Lifetime CN203705526U (en) | 2014-02-26 | 2014-02-26 | Voltage polarity judgment circuit and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203705526U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502679A (en) * | 2014-12-31 | 2015-04-08 | 广东易事特电源股份有限公司 | Bidirectional current detection circuit |
| CN104833843A (en) * | 2015-05-11 | 2015-08-12 | 西安爱生技术集团公司 | Adaptive single-port three-state voltage signal collector |
| CN106238352A (en) * | 2016-08-30 | 2016-12-21 | 扬州江新电子有限公司 | A kind of bi-directional symmetrical type integrated device separator control circuit and method for separating |
| CN108333467A (en) * | 2018-02-09 | 2018-07-27 | 兰州工业学院 | A kind of SCM Based substation's mutual inductor polarity intelligent detection device |
| CN108508379A (en) * | 2018-06-07 | 2018-09-07 | 艾乐德电子（南京）有限公司 | A kind of program control type electronic load device that can generate voltage output and test method |
-
2014
- 2014-02-26 CN CN201420084294.6U patent/CN203705526U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502679A (en) * | 2014-12-31 | 2015-04-08 | 广东易事特电源股份有限公司 | Bidirectional current detection circuit |
| CN104502679B (en) * | 2014-12-31 | 2017-10-31 | 广东易事特电源股份有限公司 | Bidirectional current detects circuit |
| CN104833843A (en) * | 2015-05-11 | 2015-08-12 | 西安爱生技术集团公司 | Adaptive single-port three-state voltage signal collector |
| CN104833843B (en) * | 2015-05-11 | 2018-08-07 | 西安爱生技术集团公司 | A kind of adaptive single port tri-state voltage signal picker |
| CN106238352A (en) * | 2016-08-30 | 2016-12-21 | 扬州江新电子有限公司 | A kind of bi-directional symmetrical type integrated device separator control circuit and method for separating |
| CN106238352B (en) * | 2016-08-30 | 2018-12-11 | 扬州江新电子有限公司 | A kind of bi-directional symmetrical type integrated device sorting machine control circuit and method for separating |
| CN108333467A (en) * | 2018-02-09 | 2018-07-27 | 兰州工业学院 | A kind of SCM Based substation's mutual inductor polarity intelligent detection device |
| CN108508379A (en) * | 2018-06-07 | 2018-09-07 | 艾乐德电子（南京）有限公司 | A kind of program control type electronic load device that can generate voltage output and test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHUHAI MAIKE INTELLIGENT TECHNOLOGY CO., LTD. Free format text: FORMER NAME: ZHUHAI GOTECH ELECTRONIC TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 519000 Guangdong city of Zhuhai province Hongqi Town Jinwan District Zhuhai Yongda Road No. 66 No. 2 building Patentee after: ZHUHAI GOTECH INTELLIGENT TECHNOLOGY Co.,Ltd. Address before: 519000 Guangdong city in Zhuhai Province town of Red Bay Area Yongda Road No. 66 No. 2 building Patentee before: ZHUHAI GOTECH ELECTRONIC TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20140709 |
|
| CX01 | Expiry of patent term |