CN208283451U - A kind of communication power supply voltage detecting circuit - Google Patents
A kind of communication power supply voltage detecting circuit Download PDFInfo
- Publication number
- CN208283451U CN208283451U CN201820460762.3U CN201820460762U CN208283451U CN 208283451 U CN208283451 U CN 208283451U CN 201820460762 U CN201820460762 U CN 201820460762U CN 208283451 U CN208283451 U CN 208283451U
- Authority
- CN
- China
- Prior art keywords
- connect
- comparator
- power supply
- resistance
- circuit
- 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.)
- Active
Links
Landscapes
- Dc Digital Transmission (AREA)
Abstract
The problems such as the utility model discloses a kind of communication power supply voltage detecting circuit, it is incomplete mainly to solve section communication power detecting existing in the prior art, protection, increases equipment input cost.The detection circuit includes the air switch QF and contactor KM being serially connected on telecommunication source line respectively, parallel connection is articulated in voltage transformer T1 and T2 on telecommunication source line, the first filter circuit being connect with voltage transformer T1, the diode VD1 being connect with the first filter circuit, the comparator A1 being connect with diode VD1, the resistance R1 and resistance R2 being connect with comparator A1, the second filter circuit being connect with voltage transformer T2, the diode VD2 being connect with the second filter circuit, the comparator A2 being connect with diode VD2, the resistance R3 and resistance R4 being connect respectively with comparator A2, connect respectively with comparator A1 and comparator A2 with door chip, the trigger circuit being connect with door chip.Utility model has many advantages, such as that structure is simple, detection is reliable, low in cost.
Description
Technical field
The utility model relates to field of communication technology, especially a kind of communication power supply voltage detecting circuit.
Background technique
Critical infrastructures of the communication power supply as entire communication network, the stabilization of communication power supply are reliably to guarantee communication
The key of the safe and reliable operation of system, once power supply system for communications failure causes the power failure to communication equipment, communication equipment
It is just unable to run, will result in telecommunication circuit interruption, communication system paralysis, so that great economic and social benefit be caused to damage
It loses.Therefore, in order to guarantee communication equipment reliability service, important communication system is all made of dual power supply or increases uninterrupted supply
Electric system.Due to equipment input cost, currently, part secondary communication power supply still uses single supply to power, communication electricity
It is connected between source and communication system by air switch.When communication system short circuit, air switch can quickly disconnect faulty equipment,
But when overvoltage occurred for communication system, air switch but cannot quickly disconnect faulty equipment, cause other normal communications
Damage.In addition, important communication equipment uses the protection system of microprocessor, by the voltage and current for acquiring communication power supply
Amount, and AD converter converts thereof into the readable digital quantity of microprocessor, this protection system function is complete, reliable in action, but
It is to also increase equipment input cost, secondary to be but not suitable in communication equipment below.
Accordingly, it is desirable to provide a kind of communication power supply voltage detecting circuit cheap, protection is complete, guarantees communication power supply
Safe and reliable operation also can quick disengagement failure equipment in communication equipment fault.
Utility model content
In view of the above shortcomings, the purpose of this utility model is to provide a kind of communication power supply voltage detecting circuits, main
The problems such as it is incomplete to solve section communication power detecting existing in the prior art, protection, increases equipment input cost.
To achieve the goals above, the technical solution adopted in the utility model is as follows:
A kind of communication power supply voltage detecting circuit, including the air switch being serially connected on three-phase four-wire system telecommunication source line
QF, the contactor KM being serially connected on three-phase four-wire system telecommunication source line, parallel connection is articulated on telecommunication source line and input terminal is distinguished
The voltage transformer T1 being connect with telecommunication source line L2 and L1, parallel connection be articulated on telecommunication source line and input terminal respectively with communication
The voltage transformer T2 that power supply line L2 is connected with L3, the first filter circuit being connect with mono- output end of voltage transformer T1, input
Hold the diode VD1 connecting with the first filter circuit, the comparator A1 that input cathode is connect with diode VD1 output end, one end
The resistance R1 and resistance R2 being connect respectively with comparator A1 input anode, the second filter being connect with mono- output end of voltage transformer T2
Wave circuit, the diode VD2 that input terminal is connect with the second filter circuit input the ratio of cathode and the connection of diode VD2 output end
Compared with device A2, one end respectively with comparator A2 input anode the resistance R3 and resistance R4 that connect, input terminal respectively with comparator A1 and
Comparator A2 connection with door chip, the trigger circuit being connect with door chip output, wherein the resistance R2 and resistance R4
The other end ground connection.
Specifically, first filter circuit include capacitor C1 that one end is connect with voltage transformer T1 and one end with
The other end of the resonance circuit L1C2, the resonance circuit L1C2 of the capacitor C1 other end are grounded.
Further, second filter circuit includes the capacitor C3 and one end that one end is connect with voltage transformer T2
It is grounded with the other end of the resonance circuit L2C4, the resonance circuit L2C4 of the capacitor C3 other end.
Preferably, another output end of the voltage transformer T1 and voltage transformer T2 is grounded respectively；The voltage is mutual
The no-load voltage ratio of sensor T1 and voltage transformer T2 are 380/5.
Further, described to be connect with the input terminal 1A of door chip with the output end of comparator A1, the input with door chip
End 1B is connect with the output end of comparator A2, is connect with the output end 1Y of door chip with trigger circuit.
Further, the trigger circuit is the triode VT that base stage is connect with the output end 1Y of door chip, three pole
The collector of pipe VT is connect with contactor KM and emitter is grounded.
Preferably, described and door chip is 74LS08.
Further, the resonance circuit L1C2 includes the inductance L1 being mutually in parallel and capacitor C2, the inductance L1 are
3.6H, capacitor C2 are 2.8uF.
Further, the resonance circuit L2C4 includes the inductance L2 being mutually in parallel and capacitor C4, the inductance L2 are
3.6H, capacitor C4 are 2.8uF.
Further, the resistance R1 is 5.3k Ω, and resistance R2 is 4.7k Ω, and R3 is 5.3k Ω, and resistance R4 is 4.7k Ω,
Capacitor C1 is 5.5uF, C2 5.5uF.
Compared with prior art, the utility model has the following beneficial effects:
(1) the utility model detects communication power supply inlet wire using the voltage transformer of incomplete star-connection, can be effective
Detection three-phase four-wire system voltage change trend, when communication power supply arbitrarily mutually occur short circuit grounding failure when, the electricity of normal phase
Pressure will increase with it, and by detecting the variation of voltage, and with and with constant differential pressure voltage-contrast, pass through the voltage for determining acquisition
Determine the voltage fluctuation situation in telecommunication circuit, triggered circuit connects truncation telecommunication circuit.To play failure communication equipment
Excision, guarantee the safe and reliable operation of other communication equipments, also avoid the long charged operation of failure communication equipment, prevent
The further expansion of communication power supply failure.In addition, voltage judgement is carried out by setting comparator, with traditional microprocessor phase
Than equipment cost is more cheap, can be widely used in secondary communication power detecting, keeps communication power supply operation more reliable.
(2) the utility model is by accessing filter circuit in voltage transformer output end, on the one hand, can exclude communication electricity
The source interference of generated surge voltage to detection circuit when being powered or powering off, guarantees to detect accurate voltage signal.Another party
Face, filter circuit can effectively shield the interference by communication power supply transmission signal of communication, the communication for avoiding telecommunication source line from loading
Signal seals in detection circuit, in this way, which the anti-interference ability of detection circuit can be improved.Moreover, in filter circuit
Output is serially connected with diode, and the voltage AC signal lower half waveform of acquisition is shielded, while guaranteeing to detect valid data,
Reduce the comparison workload of comparator.
(3) the utility model voltage mutual inductor interstar connection star-like using imperfection, collection point voltage signal is led to
It after crossing comparator comparison, does and operation, more traditional microprocessor carries out digital-to-analogue conversion, then is handled through microprocessor
Speed be obviously improved, shorten cutting communication failure time, guarantee the normal operation of other communication equipments.
Detailed description of the invention
Fig. 1 is the principles of the present invention wiring diagram.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples, and the embodiments of the present invention includes
But it is not limited to the following example.
Embodiment
As shown in Figure 1, the utility model provides a kind of communication power supply voltage detecting circuit, communication equipment both can guarantee
Communication carrier signal normal transmission, also can real-time detection communication equipment operation conditions also can quickly, accurately be cut off when failure
Failure communication equipment prevents communication failure further expansion, guarantees communication system security, stable operation.Concrete scheme is as follows:
The detection circuit includes the air switch QF being serially connected on three-phase four-wire system telecommunication source line, is serially connected in three-phase and four-line
Contactor KM on telecommunication source line processed, parallel connection be articulated on telecommunication source line and input terminal respectively with telecommunication source line L2 and L1
The voltage transformer T1 of connection, parallel connection is articulated on telecommunication source line and input terminal is connect with telecommunication source line L2 and L3 respectively
Voltage transformer T2, the first filter circuit connecting with mono- output end of voltage transformer T1, input terminal and the first filter circuit connect
The diode VD1 connect, the comparator A1 that input cathode is connect with diode VD1 output end, one end is inputted with comparator A1 respectively
The resistance R1 and resistance R2 of anode connection, the second filter circuit being connect with mono- output end of voltage transformer T2, input terminal and the
The diode VD2 of two filter circuits connection, the input comparator A2 that is connect with diode VD2 output end of cathode, one end respectively with
The resistance R3 and resistance R4 of comparator A2 input anode connection, what input terminal was connect with comparator A1 and comparator A2 respectively
74LS08 and door chip, the trigger circuit being connect with door chip output, wherein another termination of resistance R2 and resistance R4
Another output end of ground, voltage transformer T1 and voltage transformer T2 are grounded respectively.
First filter circuit of the detection circuit include the capacitor C1 that one end is connect with voltage transformer T1 and one end with
The resonance circuit L1C2 of the capacitor C1 other end；The other end of the resonance circuit L1C2 is grounded.Second filter circuit includes one end
The capacitor C3 being connect with the voltage transformer T2 and resonance circuit L2C4 of one end and the capacitor C3 other end；The resonance circuit
The other end of L2C4 is grounded.
The detection circuit is connect with the input terminal 1A of door chip with the output end of comparator A1, the input terminal with door chip
1B is connect with the output end of comparator A2, is connect with the output end 1Y of door chip with trigger circuit.Trigger circuit is base stage and door
The collector of the triode VT, the triode VT of the output end 1Y connection of chip are connect with contactor KM and emitter connects
Ground.
Wherein, the no-load voltage ratio of the voltage transformer T1 and voltage transformer T2 of the present embodiment are 380/5, and inductance L1 is
3.6H, capacitor C2 are 2.8uF, and inductance L2 is 3.6H, and capacitor C4 is 2.8uF, and resistance R1 is 5.3k Ω, and resistance R2 is 4.7k Ω,
R3 is 5.3k Ω, and resistance R4 is 4.7k Ω, and capacitor C1 is 5.5uF, and C2 5.5uF, power supply VCC are 12V.When communication power supply is powered
When, the first filter circuit and the second filter circuit play effective shielding to surge voltage, guarantee voltage detecting circuit from damage
It is bad.At this point, comparator A1 and to compare the input cathode voltage of A2 be 5.64V, the voltage for inputting cathode is 5V, comparator A1 and
Comparator A2 exports high level, at 74LS08 and the effect of door chip, exports high level, driving triode VT collector and hair
Emitter-base bandgap grading conducting, contactor KM obtain it is electric so that the main contact of contactor KM is attracted, communication power supply normal power supply.When in communication power supply
When any mutually generation ground fault or overvoltage, comparator A1 and/or comparator A2 input cathode voltage are greater than input anode
Voltage, comparator A1 and/or comparator A2 export low level, defeated on output end 1Y under the action of 4LS08 and door chip
Low level out, at this point, being truncated between the emitter and collector of triode VT, so that contactor KM power loss, contactor KM master
Contact disconnects communication power supply connection, cuts off the communication equipment of failure, plays the protective effect of communication equipment.
Filter circuit is cleverly arranged in the utility model, effectively completely cuts off the carrier signal on telecommunication source line, prevents from carrying
Wave signal seals in measure loop.In addition, setting diode is by effectively detecting voltage guaranteeing detection data effective premise
Waveform reduces the comparison workload of comparator.Moreover, pass through the voltage transformer of incomplete star-connection, acquisition communication
The voltage change situation of power supply, and by the on or off of control triode, control the on-off of communication power supply, more miniature processing
Device protection is compared, and movement is faster.In conclusion utility model has, structure is simple, detection is reliable, low in cost, protection is reliable
The advantages that, it is had a vast market foreground and promotional value in field of communication technology.
Above-described embodiment is only the preferred embodiment of the utility model, is not intended to limit the scope of the present invention,
In every case the design principle of the utility model is used, and carries out the non-creative variation worked and made on this basis, it should all
Belong within the protection scope of the utility model.
Claims (10)
1. a kind of communication power supply voltage detecting circuit, including the air switch QF being serially connected on three-phase four-wire system telecommunication source line,
It is characterized in that, further including the contactor KM being serially connected on three-phase four-wire system telecommunication source line, parallel connection is articulated in telecommunication source line
The voltage transformer T1 that upper and input terminal is connect with telecommunication source line L2 and L1 respectively, parallel connection is articulated on telecommunication source line and defeated
Enter the voltage transformer T2 that end is connect with telecommunication source line L2 and L3 respectively, first connect with mono- output end of voltage transformer T1
Filter circuit, the diode VD1 that input terminal is connect with the first filter circuit, input cathode are connect with diode VD1 output end
Comparator A1, the resistance R1 and resistance R2 that one end is connect with comparator A1 input anode respectively, exports with voltage transformer T2 mono-
Hold the second filter circuit of connection, the diode VD2 that input terminal is connect with the second filter circuit, input cathode and diode VD2
The comparator A2 of output end connection, the resistance R3 and resistance R4 that one end is connect with comparator A2 input anode respectively, input terminal point
Do not connect with comparator A1 and comparator A2 with door chip, the trigger circuit being connect with door chip output；The resistance
The other end of R2 and resistance R4 ground connection；Another output end of the voltage transformer T1 and voltage transformer T2 is grounded respectively.
2. a kind of communication power supply voltage detecting circuit according to claim 1, which is characterized in that first filter circuit
The capacitor C1 being connect including one end with the voltage transformer T1 and resonance circuit L1C2 of one end and the capacitor C1 other end；It is described
The other end of resonance circuit L1C2 is grounded.
3. a kind of communication power supply voltage detecting circuit according to claim 1, which is characterized in that second filter circuit
The capacitor C3 being connect including one end with the voltage transformer T2 and resonance circuit L2C4 of one end and the capacitor C3 other end；It is described
The other end of resonance circuit L2C4 is grounded.
4. described in any item a kind of communication power supply voltage detecting circuits according to claim 1~3, which is characterized in that the electricity
The no-load voltage ratio for pressing mutual inductor T1 and voltage transformer T2 is 380/5.
5. described in any item a kind of communication power supply voltage detecting circuits according to claim 1~3, which is characterized in that it is described with
The input terminal 1A of door chip is connect with the output end of comparator A1, is connected with the output end of the input terminal 1B and comparator A2 of door chip
It connects, is connect with the output end 1Y of door chip with trigger circuit.
6. a kind of communication power supply voltage detecting circuit according to claim 5, which is characterized in that the trigger circuit is base
The triode VT that pole is connect with the output end 1Y of door chip, the collector of the triode VT connect and emit with contactor KM
Pole ground connection.
7. described in any item a kind of communication power supply voltage detecting circuits according to claim 1~3, which is characterized in that it is described with
Door chip is 74LS08.
8. a kind of communication power supply voltage detecting circuit according to claim 2, which is characterized in that the resonance circuit L1C2
It is 3.6H including the inductance L1 being mutually in parallel and capacitor C2, the inductance L1, capacitor C2 is 2.8uF.
9. a kind of communication power supply voltage detecting circuit according to claim 3, which is characterized in that the resonance circuit L2C4
It is 3.6H including the inductance L2 being mutually in parallel and capacitor C4, the inductance L2, capacitor C4 is 2.8uF.
10. a kind of communication power supply voltage detecting circuit according to claim 1, which is characterized in that the resistance R1 is
5.3k Ω, resistance R2 are 4.7k Ω, and R3 is 5.3k Ω, and resistance R4 is 4.7k Ω, and capacitor C1 is 5.5uF, C2 5.5uF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820460762.3U CN208283451U (en) | 2018-03-30 | 2018-03-30 | A kind of communication power supply voltage detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820460762.3U CN208283451U (en) | 2018-03-30 | 2018-03-30 | A kind of communication power supply voltage detecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208283451U true CN208283451U (en) | 2018-12-25 |
Family
ID=64750448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820460762.3U Active CN208283451U (en) | 2018-03-30 | 2018-03-30 | A kind of communication power supply voltage detecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208283451U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318834A (en) * | 2018-03-29 | 2018-07-24 | 成都众宜天成科技有限公司 | communication power supply detection circuit based on comparator |
| CN108318730A (en) * | 2018-03-30 | 2018-07-24 | 成都众宜天成科技有限公司 | A kind of communication power supply voltage detecting circuit |
-
2018
- 2018-03-30 CN CN201820460762.3U patent/CN208283451U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318834A (en) * | 2018-03-29 | 2018-07-24 | 成都众宜天成科技有限公司 | communication power supply detection circuit based on comparator |
| CN108318730A (en) * | 2018-03-30 | 2018-07-24 | 成都众宜天成科技有限公司 | A kind of communication power supply voltage detecting circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203466383U (en) | Intelligent static safe energy-saving multifunctional socket with zero power consumption | |
| CN201590645U (en) | AC input over-voltage and under-voltage protection device for electric apparatus | |
| CN102931684A (en) | Photovoltaic alternate current and direct current intelligent distribution box | |
| CN207354054U (en) | The electric power system of online power equipment monitoring system | |
| CN208283451U (en) | A kind of communication power supply voltage detecting circuit | |
| CN205157709U (en) | Single -phase ground connection route selection system of dispatch end undercurrent | |
| CN111929634A (en) | N-line-based signal injection topology recognition device and method | |
| CN202978426U (en) | Fault detection terminal based on power distribution automation | |
| CN207964962U (en) | A kind of electric lightning digitlization on-Line Monitor Device | |
| CN100461593C (en) | Electronic trigger system of controllable series compensing thyristor | |
| CN204330940U (en) | A kind of line fault monitoring system | |
| CN201563174U (en) | Video monitoring front-end control box | |
| CN206775117U (en) | A kind of taiwan area anti-islanding protection system based on low pressure carrier wave | |
| CN206099310U (en) | Intelligent controller | |
| CN204597453U (en) | Electric prospection switch | |
| CN108318730A (en) | A kind of communication power supply voltage detecting circuit | |
| CN201066855Y (en) | Low-voltage remote power supply device for high-speed Ethernet switch | |
| CN204287858U (en) | A kind of intelligent agriculture row table | |
| CN207410037U (en) | A kind of intelligent anti-over under-voltage protection circuit | |
| CN108318834A (en) | communication power supply detection circuit based on comparator | |
| CN209044817U (en) | Multifunctional electric fire-disaster monitoring device based on Internet of Things | |
| CN208479180U (en) | A kind of power circuit and signal circuit protective device | |
| CN207867006U (en) | AC servo driver controls the circuit of power supply power-fail detection | |
| CN201336554Y (en) | Three-phase power-supply protector with functions of counting and timing | |
| CN108539846A (en) | A kind of automatic switch-over circuit of uninterrupted communication power supply power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190918 Address after: 518000 Chegongmiao Industrial Zone, Shatou Street, Futian District, Shenzhen City, Guangdong Province Patentee after: Shenzhen MOZAT Electric Co. Ltd. Address before: Feiyun Road Chongzhou Economic Development Zone, Chengdu City, Sichuan Province, No. 495 611230 Patentee before: Chengdu Zhongyi Tiancheng science and Technology Co., Ltd. |
|
| TR01 | Transfer of patent right |