CN107817454A - A kind of ac voltage detection circuit for power supply - Google Patents
A kind of ac voltage detection circuit for power supply Download PDFInfo
- Publication number
- CN107817454A CN107817454A CN201711213547.XA CN201711213547A CN107817454A CN 107817454 A CN107817454 A CN 107817454A CN 201711213547 A CN201711213547 A CN 201711213547A CN 107817454 A CN107817454 A CN 107817454A
- Authority
- CN
- China
- Prior art keywords
- resistance
- power supply
- detection circuit
- operational amplifier
- resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- G01R31/42—AC power supplies
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention discloses a kind of ac voltage detection circuit for power supply, including the first to the 19th resistance, the first operational amplifier, the second operational amplifier, electric capacity and NPN triode；Circuit of the present invention is made up of simple resistor, integrated transporting discharging, triode device, can detect alternating voltage input condition, can complete the accurate detection to AC power state, circuit of the present invention is simple and reliable, and cost is low, and is easily achieved.
Description
Technical field
The present invention relates to AC detection technology field, particularly a kind of ac voltage detection circuit for power supply.
Background technology
With the fast development of modern industry, the AC system applied in the occasions such as electric power, electronics, machinery is increasingly
It is more, while with the intelligent market demand to equipment and scale management, in most cases it is necessary to being exchanged in system
Power supply carries out state-detection, to judge whether the system power supply normal or unlatching/closed mode.At present, for exchange detection
Solution method is broadly divided into two major classes：When alternating current is depressured, rectification, voltage stabilizing and filtering, then by triode by its
Electronic switch amount is converted into inquire about for microcontroller；Second, directly completed using corresponding alternating voltage or AC current sensor
Detection to alternating voltage or electric current, it not only can detect AC power state, but also measurable corresponding numerical value.Obviously,
Former approach is more traditional, and its circuit structure is complicated, and less stable, is not the choosing of ideal.Later approach uses biography
Sensor, circuit is simple, can also complete the measurement to its related data in addition to detectable AC signal state, but its sensor valency
Costly, in large-scale production, equipment cost is higher for lattice.
With sharply increasing for electricity consumption load type, the market demand of AC voltage regulator is also increasing, while consumer
Requirement to the reliability and security of AC voltage regulator is also increasingly increased.Voltage detecting execution circuit is that AC voltage regulator is accurate
Measurement and the key point reliably performed.But it is low measurement accuracy to be present in the voltage detecting execution circuit of current AC voltage regulator, holds
The defects of row poor reliability.The above-mentioned measurement accuracy of prior art is low, perform poor reliability the defects of.
Ac voltage detection circuit is used to sample alternating voltage, and alternating voltage is detected, analyzed.
In commercial Application, generally require to detect the zero crossing of alternating voltage, that is, the magnitude of voltage of detection alternating voltage is zero
At the time of.Because industrial equipment generally requires to judge the cycle of alternating voltage according to alternating voltage zero-crossing point, and according to friendship
The magnitude of voltage size for flowing voltage performs associative operation, it is therefore desirable to which alternating voltage is detected.Existing alternating voltage inspection
Slowdown monitoring circuit is not high to the accuracy of detection of zero-acrross ing moment, and the zero-acrross ing moment of alternating voltage is detected often by the break-make of photoelectrical coupler
Delay is produced, under the AC voltage cycle of high speed change, often leads to accurately to detect the zero-acrross ing moment of alternating current, influences
The precision of detection.In addition, existing detection circuit can not detect the situation of the alternating voltage of input, but it is merely capable of detecting
Zero-acrross ing moment, fail the application requirement for meeting industrial equipment.Finally, due to existing ac voltage detection circuit uses photoelectricity coupling
The higher device of multiple costs such as clutch, triode, cause the complicated of ac voltage detection circuit, and production cost is high,
The encapsulation of circuit is difficult, is unfavorable for industrial production application.Therefore existing ac voltage detection circuit circuit structure exist compared with
For complexity the problem of, it is necessary to the device such as transformer, complex designing and cost is higher.
The content of the invention
The technical problems to be solved by the invention are overcome the deficiencies in the prior art and provide a kind of exchange for power supply
Voltage detecting circuit, the present invention can detect alternating voltage input condition, can complete the accurate detection to AC power state.
The present invention uses following technical scheme to solve above-mentioned technical problem：
According to a kind of ac voltage detection circuit for power supply proposed by the present invention, including the first to the 19th resistance, first
Operational amplifier, the second operational amplifier, electric capacity and NPN triode；Wherein, the live wire of one end of first resistor and AC power
Connection, the other end of first resistor are connected respectively with one end, one end of the tenth resistance, one end of second resistance of the 5th resistance,
The other end of 5th resistance is connected respectively with one end of dc source, the 6th resistance, the other end and the 9th resistance of the 6th resistance
One end, one end of the 4th resistance, one end of 3rd resistor connect respectively, the other end of 3rd resistor and the zero line of AC power
Connection, the other end of second resistance are connected respectively with the positive input terminal of the first operational amplifier, one end of the 7th resistance, and the 7th
The other end ground connection of resistance, the other end of the 4th resistance and the negative input end of the first operational amplifier, one end point of the 8th resistance
Do not connect, the other end and the output end of the first operational amplifier of the 8th resistance, one end of the 13rd resistance, the 15th resistance
One end connects respectively, the other end ground connection of the 13rd resistance, the other end of the 9th resistance and one end of the 11st resistance, the second fortune
The positive input terminal for calculating amplifier connects respectively, the other end ground connection of the 11st resistance, the other end of the tenth resistance and the second computing
The negative input end of amplifier, one end of the 12nd resistance connect respectively, the other end and the second operational amplifier of the 12nd resistance
Output end, one end, the other end of the 15th resistance, one end of the 17th resistance of the 14th resistance connect respectively, the 14th
The other end ground connection of resistance, the other end of the 17th resistance and one end of electric capacity, one end of the 18th resistance, NPN triode
Base stage is connected respectively, and the other end of electric capacity is connected with one end of the 16th resistance, the other end of the 16th resistance and the 18th electricity
The other end of resistance, the emitter stage of NPN triode, connect respectively, one end of the colelctor electrode of NPN triode and the 19th resistance connects
Connect, the other end of the 19th resistance is connected with dc source.
As a kind of further prioritization scheme of ac voltage detection circuit for power supply of the present invention, the first computing
Amplifier is OPA211 operational amplifiers.
As a kind of further prioritization scheme of ac voltage detection circuit for power supply of the present invention, the second computing
Amplifier is OPA211 operational amplifiers.
As a kind of further prioritization scheme of ac voltage detection circuit for power supply of the present invention, first resistor
Resistance it is identical with the resistance of 3rd resistor.
As a kind of further prioritization scheme of ac voltage detection circuit for power supply of the present invention, the 5th resistance
Resistance it is identical with the resistance of the 6th resistance.
The present invention compared with prior art, has following technique effect using above technical scheme：
（1）The present invention can detect alternating voltage input condition, can complete the accurate detection to AC power state；
（2）Circuit of the present invention is simple and reliable, and cost is low, and is easily achieved.
Embodiment
Technical scheme is described in further detail below：
A kind of ac voltage detection circuit for power supply, including the first to the 19th resistance, the first operational amplifier, the second fortune
Calculate amplifier, electric capacity and NPN triode；Wherein, the live wire of one end of first resistor and AC power connect, first resistor it is another
One end is connected respectively with one end, one end of the tenth resistance, one end of second resistance of the 5th resistance, the other end of the 5th resistance with
Dc source, one end of the 6th resistance connect respectively, the other end of the 6th resistance and one end of the 9th resistance, the one of the 4th resistance
End, one end of 3rd resistor connect respectively, and the zero line of the other end of 3rd resistor and AC power connects, second resistance it is another
One end is connected respectively with the positive input terminal of the first operational amplifier, one end of the 7th resistance, the other end ground connection of the 7th resistance, the
The other end of four resistance is connected respectively with the negative input end of the first operational amplifier, one end of the 8th resistance, the 8th resistance it is another
One end is connected respectively with one end of the output end of the first operational amplifier, one end of the 13rd resistance, the 15th resistance, and the 13rd
The other end ground connection of resistance, the other end of the 9th resistance and one end, the positive input terminal of the second operational amplifier of the 11st resistance
Connect respectively, the other end of the 11st resistance ground connection, the other end of the tenth resistance and the negative input end of the second operational amplifier, the
One end of 12 resistance connects respectively, the other end of the 12nd resistance and the output end of the second operational amplifier, the 14th resistance
One end, the other end of the 15th resistance, one end of the 17th resistance connect respectively, the other end ground connection of the 14th resistance, the
The other end of 17 resistance and one end of electric capacity, one end of the 18th resistance, the base stage of NPN triode connect respectively, electric capacity
The other end is connected with one end of the 16th resistance, the other end of the 16th resistance and the other end, the NPN triode of the 18th resistance
Emitter stage, connect respectively, the colelctor electrode of NPN triode is connected with one end of the 19th resistance, the 19th resistance it is another
End is connected with dc source.
First operational amplifier is OPA211 operational amplifiers, and the second operational amplifier is OPA211 operational amplifiers.The
The resistance of one resistance is identical with the resistance of 3rd resistor, and the resistance of the 5th resistance is identical with the resistance of the 6th resistance.
Alternating current obtains weak respectively by 4 resistance first resistors, 3rd resistor, the 5th resistance, the partial pressure of the 6th resistance
Piezoelectric voltage signal, this light current voltage signal are carried out respectively as the input signal of the first operational amplifier, the second operational amplifier
It is scaling；The voltage signal of two operational amplification circuit outputs links together by two resistance, carries out alternating voltage letter
Number synthesis；First operational amplifier, any road signal of the second operational amplifier output can be used as follow-up zero passage and frequency to examine
The input of slowdown monitoring circuit, so as to complete the accurate detection to AC power state.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to is assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deductions can also be made or substituted, should all be considered as belonging to the present invention's
Protection domain.
Claims (5)
1. a kind of ac voltage detection circuit for power supply, it is characterised in that including the first to the 19th resistance, the first computing
Amplifier, the second operational amplifier, electric capacity and NPN triode；Wherein, the live wire of one end of first resistor and AC power connects
Connecing, the other end of first resistor is connected respectively with one end, one end of the tenth resistance, one end of second resistance of the 5th resistance, the
The other end of five resistance is connected respectively with one end of dc source, the 6th resistance, the other end of the 6th resistance and the 9th resistance
One end, one end of the 4th resistance, one end of 3rd resistor connect respectively, and the other end of 3rd resistor and the zero line of AC power connect
Connect, the other end of second resistance is connected respectively with the positive input terminal of the first operational amplifier, one end of the 7th resistance, the 7th electricity
The other end ground connection of resistance, the other end of the 4th resistance and the negative input end of the first operational amplifier, one end of the 8th resistance are distinguished
Connection, the other end of the 8th resistance and the output end of the first operational amplifier, one end of the 13rd resistance, the one of the 15th resistance
End connects respectively, the other end ground connection of the 13rd resistance, one end, the second computing of the other end and the 11st resistance of the 9th resistance
The positive input terminal of amplifier is connected respectively, and the other end ground connection of the 11st resistance, the other end and the second computing of the tenth resistance are put
The negative input end of big device, one end of the 12nd resistance connect respectively, the other end of the 12nd resistance and the second operational amplifier
Output end, one end of the 14th resistance, the other end of the 15th resistance, one end of the 17th resistance connect respectively, the 14th electricity
The other end ground connection of resistance, the other end of the 17th resistance and one end of electric capacity, one end of the 18th resistance, the base of NPN triode
Pole is connected respectively, and the other end of electric capacity is connected with one end of the 16th resistance, the other end and the 18th resistance of the 16th resistance
The other end, NPN triode emitter stage, connect respectively, one end of the colelctor electrode of NPN triode and the 19th resistance connects
Connect, the other end of the 19th resistance is connected with dc source.
2. a kind of ac voltage detection circuit for power supply according to claim 1, it is characterised in that the first computing is put
Big device is OPA211 operational amplifiers.
3. a kind of ac voltage detection circuit for power supply according to claim 1, it is characterised in that the second computing is put
Big device is OPA211 operational amplifiers.
4. a kind of ac voltage detection circuit for power supply according to claim 1, it is characterised in that first resistor
Resistance is identical with the resistance of 3rd resistor.
5. a kind of ac voltage detection circuit for power supply according to claim 1, it is characterised in that the 5th resistance
Resistance is identical with the resistance of the 6th resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711213547.XA CN107817454A (en) | 2017-11-28 | 2017-11-28 | A kind of ac voltage detection circuit for power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711213547.XA CN107817454A (en) | 2017-11-28 | 2017-11-28 | A kind of ac voltage detection circuit for power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107817454A true CN107817454A (en) | 2018-03-20 |
Family
ID=61610546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711213547.XA Pending CN107817454A (en) | 2017-11-28 | 2017-11-28 | A kind of ac voltage detection circuit for power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107817454A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293355A (en) * | 2012-02-24 | 2013-09-11 | 东莞钜威新能源有限公司 | Voltage measuring circuit |
| CN203287421U (en) * | 2013-05-31 | 2013-11-13 | 浙江工业大学 | Measurement circuit for three-phase AC voltage and current |
| CN103443636A (en) * | 2011-01-31 | 2013-12-11 | 伊利威尔康特罗斯单一股份有限公司 | Device and method for measuring an alternating voltage |
| CN203798906U (en) * | 2013-10-11 | 2014-08-27 | 华北电力大学（保定） | AC frequency measuring device with low cost and a wide voltage range |
| CN204287305U (en) * | 2014-12-01 | 2015-04-22 | 深圳市金威源科技股份有限公司 | A kind of alternating voltage zero-crossing point testing circuit |
-
2017
- 2017-11-28 CN CN201711213547.XA patent/CN107817454A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103443636A (en) * | 2011-01-31 | 2013-12-11 | 伊利威尔康特罗斯单一股份有限公司 | Device and method for measuring an alternating voltage |
| CN103293355A (en) * | 2012-02-24 | 2013-09-11 | 东莞钜威新能源有限公司 | Voltage measuring circuit |
| CN203287421U (en) * | 2013-05-31 | 2013-11-13 | 浙江工业大学 | Measurement circuit for three-phase AC voltage and current |
| CN203798906U (en) * | 2013-10-11 | 2014-08-27 | 华北电力大学（保定） | AC frequency measuring device with low cost and a wide voltage range |
| CN204287305U (en) * | 2014-12-01 | 2015-04-22 | 深圳市金威源科技股份有限公司 | A kind of alternating voltage zero-crossing point testing circuit |
Non-Patent Citations (1)
| Title |
|---|
| 张卫丰 等: "一种简易的交流电压检测电路", 《微型机与应用》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203164326U (en) | Digital display type detection device of resistor strain sensor | |
| CN105092928A (en) | Digital clamp meter and automatic measurement method | |
| CN205608063U (en) | Hall current sensor | |
| CN108037449A (en) | A kind of high-voltage circuitbreaker automatic checkout system | |
| CN206321689U (en) | A kind of voltage isolation circuit and high_voltage isolation detect circuit | |
| CN203811737U (en) | Direct-current electric-leakage monitoring and warning device | |
| CN104459305B (en) | Power detecting circuit | |
| CN205720565U (en) | A kind of batch testing plate for testing signal condition chip | |
| CN207281217U (en) | A kind of amplifier circuit of compatibility electric current and temperature detection | |
| CN204989279U (en) | Digit split -core type meter | |
| CN206132836U (en) | Current inspecting circuit and device | |
| CN103995208A (en) | Direct current leakage monitoring and alarming device | |
| CN107817454A (en) | A kind of ac voltage detection circuit for power supply | |
| CN205643590U (en) | Multicore cable fault detection ware | |
| CN206671424U (en) | A kind of ground connection property detection means of antistatic monitoring equipment | |
| CN104166035A (en) | Negative voltage detection apparatus | |
| CN107907269A (en) | A kind of resistance bridge sensor diagnostics circuit | |
| CN103163406A (en) | Durable testing table of vehicle instrument based on controller area network (CAN) | |
| CN206725670U (en) | Detection means for filter capacitor in PLC module | |
| CN204631180U (en) | A kind of parallel thyristors leak current detection device and system | |
| CN201859176U (en) | Direct current micro voltage/micro current detection device | |
| CN207832882U (en) | A kind of integrated circuit of high-precision measuring electricity consumption and electrical leakage | |
| CN103543322B (en) | A kind of photovoltaic combining inverter leak current detection device | |
| CN206848359U (en) | A kind of high precision electro flow measurement circuitry | |
| CN206772473U (en) | A kind of simple pressure sensor test system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180320 |