CN205829463U - A kind of Circuits System of fault-safety principle - Google Patents
A kind of Circuits System of fault-safety principle Download PDFInfo
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- CN205829463U CN205829463U CN201620672142.7U CN201620672142U CN205829463U CN 205829463 U CN205829463 U CN 205829463U CN 201620672142 U CN201620672142 U CN 201620672142U CN 205829463 U CN205829463 U CN 205829463U
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- 238000012544 monitoring process Methods 0.000 claims description 16
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- 230000005611 electricity Effects 0.000 claims description 7
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- 230000001143 conditioned effect Effects 0.000 claims description 2
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- 230000005622 photoelectricity Effects 0.000 claims 1
- 238000002955 isolation Methods 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 5
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- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
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- 238000003079 width control Methods 0.000 description 2
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Abstract
The application proposes the Circuits System of a kind of fault-safety principle, including: logic control circuit and power output circuit；Described logic control circuit includes that two-way power output circuit and multivibrator, described power output circuit include second switch power supply；Power output circuit described in every road includes the first photoisolator and the first Switching Power Supply being connected, described first photoisolator receives the output pulse of corresponding central processor CPU, and described output pulse is exported to the first Switching Power Supply, the power supply input of two-way the first Switching Power Supply is provided by DC source, the power supply output of two-way the first Switching Power Supply is to described multivibrator, described multivibrator output high-frequency impulse, to second switch power supply, is carried out voltage output by described second switch power supply.Meet the layout strategy of reaction equation safety, and input and output isolation so that be mutually isolated between the passage of dynamic power supplies, meet separate security requirement.
Description
Technical field
This utility model relates to distribution system, is specifically related to the Circuits System of a kind of fault-safety principle.
Background technology
In railway signal control system, dynamic power supplies circuit is a very important ingredient in whole system,
The instruction of fail-safe computer in primary recipient control system, dynamic driving output DC source, the directly safety outside driving
Relay.The input of this dynamic power supplies circuit for 24V DC ± 10%, exports 24V DC ± 10%, input with export mutually isolated,
Also have two-way dynamic pulse to control simultaneously, and if only if two-way dynamic pulse simultaneously in the presence of, this dynamic power supplies circuit is just made
Can out-put supply.The design of this circuit meets failure to safety principle, and this circuit is made up of the discrete component that fault mode is clear and definite,
Any one components and parts fault all can make power circuit stop output, has i.e. guided secure side.
As it is shown in figure 1, in the related, dynamic power supplies input and output are not isolated, output are not carried out feedback control
System, causes that output voltage is unstable, power supply conversion efficiency is low, MOS switch pipe caloric value is big, does not additionally have output port of power source
Design back production function, causes CPU cannot obtain the output state of power supply, it is impossible to meet the requirement of existing whistle control system.
Utility model content
The utility model proposes the Circuits System of a kind of fault-safety principle, it is achieved input and export isolation, dynamic electric
Between the passage in source mutually isolated, meet separate security requirement.
In order to realize above-mentioned utility model purpose, the technical scheme that this utility model is taked is as follows:
A kind of Circuits System of fault-safety principle, including: logic control circuit and power output circuit；
Described logic control circuit includes that two-way power output circuit and multivibrator, described power output circuit include
Second switch power supply；
Power output circuit described in every road includes the first photoisolator and the first Switching Power Supply being connected, described first light
Electric isolator receives the output pulse of corresponding central processor CPU, and exports described output pulse to the first Switching Power Supply,
The power supply input of two-way the first Switching Power Supply is provided by DC source, and the power supply output of two-way the first Switching Power Supply is to described multi resonant
Agitator, described multivibrator output high-frequency impulse, to second switch power supply, is carried out voltage by described second switch power supply defeated
Go out.
Preferably, described power output circuit also includes that current sampling circuit, described current sampling circuit collection second are opened
Close the electric current of power supply output.
Preferably, described power output circuit also includes over-voltage and over-current observation circuit, and described over-voltage and over-current observation circuit is supervised
Survey the electric current that the voltage and current sample circuit of second switch power supply output gathers, when described voltage or the described electric current of monitoring
Meet pre-conditioned, feed back to described multivibrator.
Preferably, power output circuit described in every road also includes the first rectifier filter, and described first rectifier filter is even
It is connected between described first Switching Power Supply and described multivibrator.
Preferably, described power output circuit also includes that the second rectifier filter, described second rectifier filter are connected to
Between described second switch power supply and described current sampling circuit.
Preferably, described Circuits System also includes that feedback control circuit, described feedback control circuit include a road electric current
Back production circuit, a road voltage back production circuit, the second photoisolator and the 3rd photoisolator, described electric current returns steps on circuit monitoring
The electric current that current sampling circuit gathers, and described monitoring current is fed back to described in correspondence by described second photoisolator
CPU, described voltage returns steps on the voltage that circuit monitoring current sampling circuit gathers, and by described monitoring voltage by described 3rd light
Electric isolator feeds back to the described CPU of correspondence.
Preferably, described first Switching Power Supply and described second switch power supply are inverse-excitation type switch power-supply.
Preferably, described inverse-excitation type switch power-supply include the metal-oxide semiconductor (MOS) MOS switch pipe that is connected and every
From transformator.
Compared to the prior art this utility model, has the advantages that
Power circuit is divided into front and back stages by the technical solution of the utility model, and the first order is logic control circuit, mainly
Realize two and take the design of two, meet the layout strategy of combination safety；The second level is power output circuit, also has feedback control electricity
Road, improves the precision of output voltage, and has automatic protection functions, additionally output voltage and electric current are carried out back production, CPU enter
Row condition adjudgement, meets the layout strategy of reaction equation safety, and inputs and output isolation so that between the passage of dynamic power supplies
Mutually isolated, meet separate security requirement.
Accompanying drawing explanation
Fig. 1 is the structural representation of the dynamic power supplies circuit of correlation technique；
Fig. 2 is the structural representation of the Circuits System of the fault-safety principle of this utility model embodiment.
Detailed description of the invention
For making utility model purpose of the present utility model, technical scheme and beneficial effect of greater clarity, below in conjunction with
Embodiment of the present utility model is illustrated by accompanying drawing, it should be noted that the enforcement in the case of not conflicting, in the application
Feature in example and embodiment can mutual combination in any.
As in figure 2 it is shown, this utility model embodiment provides the Circuits System of a kind of fault-safety principle, including: logic control
Circuit processed and power output circuit；
Described logic control circuit includes that two-way power output circuit and multivibrator, described power output circuit include
Second switch power supply；
Power output circuit described in every road includes the first photoisolator and the first Switching Power Supply being connected, described first light
Electric isolator receives the output pulse of corresponding central processor CPU, and exports described output pulse to the first Switching Power Supply,
The power supply input of two-way the first Switching Power Supply is provided by DC source, and the power supply output of two-way the first Switching Power Supply is to described multi resonant
Agitator, described multivibrator output high-frequency impulse, to second switch power supply, is carried out voltage by described second switch power supply defeated
Go out.
Logic control circuit of the present utility model includes the duplicate power output circuit of two-way, two power supply output electricity
Road is respectively by the output Pulse Width Control of two outer CPUs, and output two-way power supply is that multivibrator is powered, and multivibrator is necessary
Starting of oscillation could export high-frequency impulse, any road power failure when duplex feeding is all normal, multivibrator stops shake the most immediately
Swing, cut off high-frequency impulse output.
Described power output circuit also includes current sampling circuit, and it is defeated that described current sampling circuit gathers second switch power supply
The electric current gone out.
The high-frequency impulse of multivibrator output is as the control pulse of power output circuit.
Described power output circuit also includes that over-voltage and over-current observation circuit, described over-voltage and over-current monitoring circuit monitors second are opened
Close the electric current that the voltage and current sample circuit of power supply output gathers, preset when the described voltage monitored or described electric current meet
Condition, feeds back to described multivibrator.
It is described that power output circuit described in every road also includes that the first rectifier filter, described first rectifier filter are connected to
Between first Switching Power Supply and described multivibrator.
Described power output circuit also includes that the second rectifier filter, described second rectifier filter are connected to described second
Between Switching Power Supply and described current sampling circuit.
Described Circuits System also includes that feedback control circuit, described feedback control circuit include a road electric current back production electricity
Road, a road voltage back production circuit, the second photoisolator and the 3rd photoisolator, described electric current returns to be stepped on circuit monitoring electric current and adopts
The electric current that sample circuit gathers, and described monitoring current is fed back to by described second photoisolator the described CPU of correspondence, institute
State voltage and return the voltage stepping on the collection of circuit monitoring current sampling circuit, and by described monitoring voltage by described 3rd Phototube Coupling
Device feeds back to the described CPU of correspondence.
Described first Switching Power Supply and described second switch power supply are inverse-excitation type switch power-supply.
Described inverse-excitation type switch power-supply includes metal-oxide semiconductor (MOS) MOS switch pipe and the isolation transformation being connected
Device.
Embodiment 1
The Circuits System event block diagram of the interior a kind of fault-safety principle designed by the present invention of Fig. 2 frame, can from figure
Being divided into two-stage to power-supply system, the first order is logic control circuit, the duplicate power output circuit of two-way realize, respectively
Output Pulse Width Control by two outer CPUs, it is achieved two take two frameworks, inverse-excitation type switch power-supply is become by MOS switch pipe and isolation
Depressor realizes, and meets isolated from power and pressure requirement of insulating, and power output circuit exports two-way 24V-1 and 24V-2 electricity respectively
Source, powers for multivibrator, starting of oscillation could export high-frequency impulse, Ren Heyi when the necessary duplex feeding of multivibrator is all normal
Road power failure, multivibrator stops concussion the most immediately, cuts off high-frequency impulse output.Due to multivibrator power consumption very
Little, metal-oxide-semiconductor, transformator that therefore logic control level is selected are low-power device, encapsulate less, significantly reduce dynamic power supplies
Volume.
The high-frequency impulse of multivibrator output is as the control pulse of second level power output circuit, power output circuit
Inverse-excitation type switch power-supply be also to be realized by metal-oxide-semiconductor and isolating transformer, simply use metal-oxide-semiconductor and the isolation transformation of relatively high power instead
Device, meets the requirement of output, is designed with over-voltage and over-current observation circuit at power output end, when output voltage is more than preset value
Time (the present embodiment being 24V), or when output electric current exceedes rated current, over-voltage and over-current observation circuit action, cut off multi resonant
The output pulse of agitator, thus cut off output, after trouble shooting, this over-voltage and over-current observation circuit can recover automatically, thus
Ensure that the precision of this electric power output voltage, and automatically protecting when realizing over-voltage and over-current.
Outfan at power output circuit is designed with feedback control circuit, by the state that collects through Phototube Coupling with
In rear access CPU, the output state of CPU Real-time Collection power output circuit, once detect faulty, report immediately.Output
Back production circuit and CPU carry out Phototube Coupling, it is ensured that after the failure conditions such as outfan generation surge interference, electric current, voltage jump,
All CPU side dependent failure be will not be produced, availability and the safety of circuit improved.
In whole fault-safety principle design of circuit system, comprehensively have employed Combined type safety, reaction equation security control
Strategy, and employ photoelectric isolation technology, inverse-excitation type switch power-supply technology, multivibrator technology, feedback of voltage and current control
Technology, voltage x current actual mining technology.When any one component failure in dynamic power supplies, it is possible to ensure that output is cut off immediately, guide
Secure side, and the input of power supply is mutually isolated with output, and this dynamic power supplies out-put supply precision is up to 24VDC ± 10%,
Big output is 1.5W, and conversion efficiency, up to 60%, can meet the dynamic power supplies requirement of various whistle control system.
Although the embodiment disclosed in this utility model is as above, but its content is only to facilitate understand this utility model
Technical scheme and the embodiment that uses, be not intended to limit this utility model.Any this utility model art
Interior technical staff, on the premise of without departing from the core technology scheme disclosed in this utility model, can be in the form implemented
With make any amendment and change in details, but the protection domain that this utility model is limited, still must be with appending claims
Limit in the range of standard.
Claims (8)
1. the Circuits System of a fault-safety principle, it is characterised in that including: logic control circuit and power output circuit；
Described logic control circuit includes that two-way power output circuit and multivibrator, described power output circuit include second
Switching Power Supply；
Power output circuit described in every road includes the first photoisolator and the first Switching Power Supply being connected, described first photoelectricity every
Receive the output pulse of corresponding central processor CPU from device, and described output pulse is exported to the first Switching Power Supply, two-way
The power supply input of the first Switching Power Supply is provided by DC source, and the power supply output of two-way the first Switching Power Supply is to described multi-harmonic-oscillations
Device, described multivibrator output high-frequency impulse, to second switch power supply, is carried out voltage output by described second switch power supply.
2. Circuits System as claimed in claim 1, it is characterised in that: described power output circuit also includes current sample electricity
Road, described current sampling circuit gathers the electric current of second switch power supply output.
3. Circuits System as claimed in claim 2, it is characterised in that: described power output circuit also includes that over-voltage and over-current is monitored
Circuit, the electric current that the voltage and current sample circuit of described over-voltage and over-current monitoring circuit monitors second switch power supply output gathers,
When described voltage or the described electric current of monitoring meet pre-conditioned, feed back to described multivibrator.
4. Circuits System as claimed in claim 1, it is characterised in that: power output circuit described in every road also includes the first rectification
Wave filter, described first rectifier filter is connected between described first Switching Power Supply and described multivibrator.
5. Circuits System as claimed in claim 2, it is characterised in that: described power output circuit also includes the second rectifying and wave-filtering
Device, described second rectifier filter is connected between described second switch power supply and described current sampling circuit.
6. Circuits System as claimed in claim 2, it is characterised in that also include feedback control circuit, described feedback control electricity
Road includes a road electric current back production circuit, a road voltage back production circuit, the second photoisolator and the 3rd photoisolator, described electricity
Flow back to step on the electric current that circuit monitoring current sampling circuit gathers, and described monitoring current is anti-by described second photoisolator
Being fed to the described CPU of correspondence, described voltage returns steps on the voltage that circuit monitoring current sampling circuit gathers, and by described monitoring voltage
The described CPU of correspondence is fed back to by described 3rd photoisolator.
7. Circuits System as claimed in claim 1, it is characterised in that described first Switching Power Supply and described second switch power supply
For inverse-excitation type switch power-supply.
8. Circuits System as claimed in claim 7, it is characterised in that: described inverse-excitation type switch power-supply includes the metal being connected
Oxide semiconductor MOS switch pipe and isolating transformer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620672142.7U CN205829463U (en) | 2016-06-29 | 2016-06-29 | A kind of Circuits System of fault-safety principle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620672142.7U CN205829463U (en) | 2016-06-29 | 2016-06-29 | A kind of Circuits System of fault-safety principle |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107612384A (en) * | 2017-11-03 | 2018-01-19 | 北京聚智达科技有限公司 | Safety-type dynamic driver circuit |
| CN107612368A (en) * | 2017-11-03 | 2018-01-19 | 北京聚智达科技有限公司 | Failure safe power supply |
| CN109709930A (en) * | 2017-10-25 | 2019-05-03 | 株洲中车时代电气股份有限公司 | A kind of fault-safety principle control device and method |
| CN114188187A (en) * | 2021-11-08 | 2022-03-15 | 陕西千山航空电子有限责任公司 | Control signal system |
| CN114647181A (en) * | 2022-01-10 | 2022-06-21 | 北京全路通信信号研究设计院集团有限公司 | Two-out-of-two safety output circuit system and method |
-
2016
- 2016-06-29 CN CN201620672142.7U patent/CN205829463U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709930A (en) * | 2017-10-25 | 2019-05-03 | 株洲中车时代电气股份有限公司 | A kind of fault-safety principle control device and method |
| CN109709930B (en) * | 2017-10-25 | 2020-09-25 | 株洲中车时代电气股份有限公司 | Fault guiding safety control device and method |
| CN107612384A (en) * | 2017-11-03 | 2018-01-19 | 北京聚智达科技有限公司 | Safety-type dynamic driver circuit |
| CN107612368A (en) * | 2017-11-03 | 2018-01-19 | 北京聚智达科技有限公司 | Failure safe power supply |
| CN114188187A (en) * | 2021-11-08 | 2022-03-15 | 陕西千山航空电子有限责任公司 | Control signal system |
| CN114188187B (en) * | 2021-11-08 | 2024-04-16 | 陕西千山航空电子有限责任公司 | Control signal system |
| CN114647181A (en) * | 2022-01-10 | 2022-06-21 | 北京全路通信信号研究设计院集团有限公司 | Two-out-of-two safety output circuit system and method |
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