CN112858945A - Positive and negative power supply detection device - Google Patents
Positive and negative power supply detection device Download PDFInfo
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- CN112858945A CN112858945A CN202110110227.1A CN202110110227A CN112858945A CN 112858945 A CN112858945 A CN 112858945A CN 202110110227 A CN202110110227 A CN 202110110227A CN 112858945 A CN112858945 A CN 112858945A
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- positive
- negative power
- power supply
- triode
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
Abstract
The invention discloses a positive and negative power supply detection device which is characterized by comprising a bracket and a positive and negative power supply detection circuit arranged on the bracket, wherein the detection circuit comprises a PNP triode T1, an NPN triode T2, three resistors R1-R3 and a light emitting diode LED 1; the circuit can monitor whether the power supply of the positive and negative power supplies is normal or not, and can be used for trainees to practice the connection of the positive and negative power supplies. When the power supply of the positive and negative power supplies is normal, the monitoring function that the indicator lamp is turned off when any one group of power supplies are not powered is ingeniously realized through a plurality of simple components, and a complex detection circuit is omitted. When the device is used for connection exercise of positive and negative power supplies, the exercise circuit board can be built by using a plurality of very cheap components, the indicator lamp can be lightened only when the positive and negative power supplies are correctly connected, a complex and expensive positive and negative power supply electronic suite is omitted, the device also has flexible and various connection modes, can be connected with a group of positive and negative power supplies, and can also be connected with two groups of positive power supplies, a group of negative power supplies and the like.
Description
Technical Field
The invention relates to a power supply detection device, in particular to a detection device capable of detecting multiple groups of positive and negative power supplies simultaneously.
Background
The general power supply detection circuit is that a group power uses an pilot lamp, and corresponding pilot lamp goes out when which group power does not supply power, and this kind of method has following drawback: 1. the number of required components is large, and the cost is high; 2. a plurality of indicator lamps need to be installed on the panel, so that the occupied space is large, and the cost is increased. The general practice of connecting positive and negative power sources is to purchase an electronic package that requires at least one positive power source and one negative power source, which has the following disadvantages: 1. electronic kits requiring a negative power supply are relatively rare in the market; 2. it is not easy to directly judge whether the connection method is correct; 3. the connection mode is single, can not carry out multiple connection combination exercise.
Disclosure of Invention
In order to overcome the defects of the conventional positive and negative power supply detection circuit and the method for practicing the connection of the positive and negative power supplies, the invention provides the positive and negative power supply detection device, which can detect a plurality of groups of positive and negative power supplies or practice various positive and negative power supply connection methods through a simple circuit.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the positive and negative power supply detection device is characterized by comprising a bracket and a positive and negative power supply detection circuit arranged on the bracket, wherein the detection circuit comprises a first triode T1, a second triode T2, a light-emitting diode LED1, a first resistor R1, a second resistor R3 and a third resistor R3, the first triode T1 is a PNP triode, and the second triode T2 is an NPN triode; one end of the first resistor R1 is connected to a base of a first triode T1, one end of the second resistor R2 is connected to a base of a second triode T2, after the third resistor R3 is connected in series with the light emitting diode LED1, two ends of the third resistor R3 are respectively connected to a collector of a first triode T1 and a collector of a second triode T2, the other end of the second resistor R2, an emitter of a first triode T1, the other end of the first resistor R1 and an emitter of a second triode T2 are respectively and correspondingly provided with a first access end, a second access end, a third access end and a fourth access end, one of the first access end, the second access end, the third access end and the fourth access end is connected with a public end of a positive power supply and a negative power supply, and the other access ends of the positive power supply and the negative power supply are.
Furthermore, among four access ends of the positive and negative power supply detection circuit, the first access end, the second access end, the third access end and the fourth access end are sequentially arranged from large to small according to the size of the accessed positive and negative power supply voltage values by taking the voltage value of the connection public end as 0
Furthermore, the first access end and the second access end are provided with connecting switches, and the first access end and the second access end are connected or disconnected through the connecting switches.
Further, the power supply further comprises a relay J1, wherein the relay J1 is installed on the bracket, and the first access end, the second access end, the third access end and the fourth access end are connected with a plurality of positive and negative power supplies through a relay J1.
Furthermore, all electronic components and mutual connecting wires in the positive and negative power supply detection circuit are independently fixed on the bracket.
Furthermore, the positive and negative power supply detection circuit is formed in a circuit board mode, the circuit board is fixedly installed on the support, and all electronic components in the positive and negative power supply detection circuit are welded on the circuit board.
The invention has the beneficial effects that: when the power supply of the positive and negative power supplies is normal, the monitoring function that the indicator lamp is turned off when any one group of power supplies are not powered is ingeniously realized through a plurality of simple components, and a complex detection circuit is omitted. When the device is used for connection practice of a positive power supply and a negative power supply of a student, the practice circuit board can be built by using a plurality of very cheap components, and the indicating lamp can be lightened when the positive power supply and the negative power supply are correctly connected, so that a complex and expensive positive power supply and negative power supply electronic suite is omitted. The circuit of the device also has flexible and various connection modes, and can be connected with a group of positive and negative power supplies, or two groups of positive power supplies and one group of negative power supplies, or one group of positive power supplies and two groups of negative power supplies.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the embodiments, and it is apparent that the described embodiments are some, but not all embodiments of the present invention.
Drawings
Fig. 1 is a schematic diagram of a positive and negative power supply detection circuit of the apparatus of the present invention.
Fig. 2 is a schematic circuit diagram of the positive and negative power detection circuit of the apparatus of the present invention connected to a set of positive power supplies and a set of negative power supplies.
Fig. 3 is a schematic circuit diagram of the positive and negative power detection circuit of the device of the present invention connecting two sets of positive power supplies and one set of negative power supplies.
Fig. 4 is a schematic circuit diagram of the positive and negative power detection circuit of the apparatus of the present invention connected to a set of positive power supplies and two sets of negative power supplies.
Detailed Description
The positive and negative power supply detection device comprises a bracket, a positive and negative power supply detection circuit and a relay J1, wherein the positive and negative power supply detection circuit and the relay J1 are installed on the bracket. As shown in fig. 1, the positive and negative power detection circuit includes a first transistor T1, a second transistor T2, a light emitting diode LED1, a first resistor R1, a second resistor R3, and a third resistor R3. The first transistor T1 is a PNP transistor, and the second transistor T2 is an NPN transistor. One end of a first resistor R1 is connected to the base of a first triode T1, one end of a second resistor R2 is connected to the base of a second triode T2, and two ends of a third resistor R3 are respectively connected to the collector of the first triode T1 and the collector of the second triode T2 after the third resistor R3 is connected with the light emitting diode LED1 in series. The other end of the second resistor R2, the emitter of the first triode T1, the other end of the first resistor R1, and the emitter of the second triode T2 are respectively and correspondingly formed with a first access terminal 1, a second access terminal 2, a third access terminal 3, and a fourth access terminal 4. One of the first access end 1, the second access end 2, the third access end 3 and the fourth access end 4 is connected with a public end GND of a positive power supply and a negative power supply through a relay J1, the other access ends are connected with the other end of the positive power supply and the negative power supply through a relay J1, the voltage value of the connected public end GND is 0, and the first access end 1, the second access end 2, the third access end 3 and the fourth access end 4 are sequentially arranged from large to small according to the positive and negative power supply voltage values. A connecting switch (not shown in the figure) is arranged between the first access end 1 and the second access end 2, and the first access end and the second access end are connected or disconnected through the opening and closing of the connecting switch.
As shown in fig. 2, the positive and negative power detection circuit is connected to a set of positive power supplies (e.g., +5V power supplies) and a set of negative power supplies (e.g., -5V power supplies). The positive power supply is connected to the emitter of the first transistor T1 and the other end of the second resistor R2 connected to the base of the second transistor T2 (at this time, the connection switch is in a closed conducting state), the negative power supply is connected to the emitter of the second transistor T2, and the other end of the first resistor R1 connected to the base of the first transistor T1 is connected to the common terminal GND of the two sets of power supplies.
As shown in fig. 3, when the positive and negative power detection circuit is connected to two sets of positive power supplies (e.g., +12V and +5V power supplies) and one set of negative power supply (e.g., -5V power supply), the positive power supply with higher voltage is connected to the other end of the second resistor R2 at the base of the second transistor T2, the positive power supply with lower voltage is connected to the emitter of the first transistor T1, the negative power supply is connected to the emitter of the second transistor T2, and the other end of the first resistor R1 connected to the base of the first transistor T1 is connected to the common terminal GND of the three sets of power. The first transistor T1 detects a set of positive power supplies with lower voltages, and the first transistor T1 is in saturated conduction when the power supplies are normal. The second transistor T2 detects the voltage between a set of positive and negative power supplies with higher voltage, and the second transistor T2 is in saturated conduction when the voltage is normal. When the polarity of the voltage between the positive power supply and the negative power supply with lower voltage is normal, the light-emitting diode LED1 between the two saturated and conducted triodes emits light, so that the function of simultaneously detecting two groups of positive power supplies and one group of negative power supplies is realized.
As shown in FIG. 4, the positive and negative power detection circuit is connected to a positive power supply (e.g., +12V power supply) and two negative power supplies (e.g., -5V and-12V power supplies). The positive power supply is connected with the other end of a second resistor R2 connected with the base electrode of the second triode T2, the negative power supply with lower voltage is connected with the other end of a first resistor R1 connected with the base electrode of the first triode T1, the negative power supply with higher voltage is connected with the emitting electrode of the second triode T2, and the emitting electrode of the first triode T1 is connected with the common end GND of the three groups of power supplies.
The present invention is not limited to the above-described embodiments, and various modifications made without inventive step from the above-described concept will fall within the scope of the present invention for those skilled in the art.
Claims (6)
1. The positive and negative power supply detection device is characterized by comprising a bracket and a positive and negative power supply detection circuit arranged on the bracket, wherein the positive and negative power supply detection circuit comprises a first triode T1, a second triode T2, a light-emitting diode LED1, a first resistor R1, a second resistor R3 and a third resistor R3, the first triode T1 is a PNP triode, and the second triode T2 is an NPN triode; one end of the first resistor R1 is connected to a base of a first triode T1, one end of the second resistor R2 is connected to a base of a second triode T2, after the third resistor R3 is connected in series with the light emitting diode LED1, two ends of the third resistor R3 are respectively connected to a collector of a first triode T1 and a collector of a second triode T2, the other end of the second resistor R2, an emitter of a first triode T1, the other end of the first resistor R1 and an emitter of a second triode T2 are respectively and correspondingly provided with a first access end, a second access end, a third access end and a fourth access end, one of the first access end, the second access end, the third access end and the fourth access end is connected with a public end of a positive power supply and a negative power supply, and the other access ends of the positive power supply and the negative power supply are.
2. The positive-negative power supply detection device according to claim 1, wherein the first access terminal, the second access terminal, the third access terminal and the fourth access terminal are sequentially arranged from large to small according to the magnitude of the voltage value of the positive-negative power supply, wherein the voltage value of the common terminal is 0.
3. The positive-negative power supply detection device according to claim 1, wherein the first and second access terminals are provided with connection switches, and the first and second access terminals are connected or disconnected through the connection switches.
4. The positive-negative power supply detecting device according to claim 1, further comprising a relay J1, wherein the relay J1 is mounted on the bracket, and the first, second, third and fourth access terminals are connected to the plurality of positive-negative power supplies through a relay J1.
5. The positive-negative power supply detection device according to claim 1, wherein each electronic component and the connecting wires between the electronic components in the positive-negative power supply detection circuit are independent on the bracket.
6. The positive-negative power supply detection device according to claim 1, wherein the positive-negative power supply detection circuit is formed in a manner of a circuit board, the circuit board is fixedly mounted on a bracket, and each electronic component in the positive-negative power supply detection circuit is soldered on the circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110110227.1A CN112858945A (en) | 2021-01-26 | 2021-01-26 | Positive and negative power supply detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110110227.1A CN112858945A (en) | 2021-01-26 | 2021-01-26 | Positive and negative power supply detection device |
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| CN112858945A true CN112858945A (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110110227.1A Pending CN112858945A (en) | 2021-01-26 | 2021-01-26 | Positive and negative power supply detection device |
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Citations (10)
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|---|---|---|---|---|
| WO2000014847A1 (en) * | 1998-09-04 | 2000-03-16 | Robert Bosch Gmbh | Polarity reversal protection circuit for a final electronic power stage |
| CN101097249A (en) * | 2006-06-27 | 2008-01-02 | 中兴通讯股份有限公司 | Device used for low voltage electric power detection indicating |
| CN102023285A (en) * | 2009-09-16 | 2011-04-20 | 深圳Tcl新技术有限公司 | Undervoltage detection circuit of power supply |
| CN102508004A (en) * | 2011-11-15 | 2012-06-20 | 中国航空工业集团公司第六三一研究所 | Power voltage monitoring circuit |
| CN204086502U (en) * | 2014-08-22 | 2015-01-07 | 深圳怡化电脑股份有限公司 | A kind of supervisory circuit of multiple power supplies |
| CN204145442U (en) * | 2014-11-04 | 2015-02-04 | 上海龙诚自动化系统有限公司 | Positive and negative power supply synchronously powers on scheme circuitry |
| CN105629182A (en) * | 2015-12-24 | 2016-06-01 | 天津齐纳星科技有限公司 | Power supply detector |
| CN208013394U (en) * | 2017-12-12 | 2018-10-26 | 厦门科华恒盛股份有限公司 | A kind of power detector |
| CN109164399A (en) * | 2018-09-10 | 2019-01-08 | 大族激光科技产业集团股份有限公司 | Power detecting system and test method |
| CN111175561A (en) * | 2019-12-30 | 2020-05-19 | 漳州科华技术有限责任公司 | Dual-power voltage detection circuit and system |
-
2021
- 2021-01-26 CN CN202110110227.1A patent/CN112858945A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000014847A1 (en) * | 1998-09-04 | 2000-03-16 | Robert Bosch Gmbh | Polarity reversal protection circuit for a final electronic power stage |
| CN101097249A (en) * | 2006-06-27 | 2008-01-02 | 中兴通讯股份有限公司 | Device used for low voltage electric power detection indicating |
| CN102023285A (en) * | 2009-09-16 | 2011-04-20 | 深圳Tcl新技术有限公司 | Undervoltage detection circuit of power supply |
| CN102508004A (en) * | 2011-11-15 | 2012-06-20 | 中国航空工业集团公司第六三一研究所 | Power voltage monitoring circuit |
| CN204086502U (en) * | 2014-08-22 | 2015-01-07 | 深圳怡化电脑股份有限公司 | A kind of supervisory circuit of multiple power supplies |
| CN204145442U (en) * | 2014-11-04 | 2015-02-04 | 上海龙诚自动化系统有限公司 | Positive and negative power supply synchronously powers on scheme circuitry |
| CN105629182A (en) * | 2015-12-24 | 2016-06-01 | 天津齐纳星科技有限公司 | Power supply detector |
| CN208013394U (en) * | 2017-12-12 | 2018-10-26 | 厦门科华恒盛股份有限公司 | A kind of power detector |
| CN109164399A (en) * | 2018-09-10 | 2019-01-08 | 大族激光科技产业集团股份有限公司 | Power detecting system and test method |
| CN111175561A (en) * | 2019-12-30 | 2020-05-19 | 漳州科华技术有限责任公司 | Dual-power voltage detection circuit and system |
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Application publication date: 20210528 |
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