CN103513087A - Self-adaptation load matching current collecting switching circuit - Google Patents
Self-adaptation load matching current collecting switching circuit Download PDFInfo
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- CN103513087A CN103513087A CN201310473206.1A CN201310473206A CN103513087A CN 103513087 A CN103513087 A CN 103513087A CN 201310473206 A CN201310473206 A CN 201310473206A CN 103513087 A CN103513087 A CN 103513087A
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Abstract
The invention discloses a self-adaptation load matching current collecting switching circuit which comprises a control system A and a control system B. A wire is connected between two pins of the control system A. When the control system A is in place, a power source of the control system B enters from one end and exits from the other end and the control system B is powered on; when the control system A is not in place, a power source circuit of the control system B is cut off, the control system B is powered off, and whether the control system A is in place or not is detected by the control system B. The self-adaptation load matching current collecting switching circuit is simple in design, small in number of adopted relays and low in cost. Load matching is conducted through circuit self-adaptation and manual intervention is not needed.
Description
Technical field
The invention belongs to design of electronic circuits technical field, specifically refer to a kind of current signal Acquisition Circuit that can be applied in the systems such as safety signal system, industry control message system.
Background technology
In industrial control system and safety signal system (being applied to the industries such as aviation electronics, railway signal, nuclear power), for security consideration, adopt the scheme of active and standby two control systems.Active and standby two control system control system all can be used commutation circuit during to same amperometric sensor signals collecting.
Prior art gathers commutation circuit for current signal and all has following some defects and restriction:
1. need manual intervention to change board;
2. need manual intervention to change distribution;
3. need manual operation change-over switch.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of self-adapting load matching current and gathers commutation circuit, and it can, when active and standby two control system change, do adaptive coupling to the load of current signal Acquisition Circuit.
In order to solve above technical matters, the invention provides a kind of self-adapting load matching current and gather commutation circuit; Comprise A, B two control systems; Between two pins of A control system, connect a wire; When A control system is in place, the power supply of B control system enters from one end, and another brings out, the energising of B control system; When A control system is not in place, B control system power path is disconnected, the power-off of B control system, and whether B control system detects A control system in place.
Beneficial effect of the present invention is: circuit design is simple, adopts relay few, and cost is low.Circuit self-adaptation is carried out load matched, without manual intervention.
When A control system ZhongK2A contact disconnects, the current signal of sensor output CH1 is 2R to earth resistance, and during the normally opened relay K2A closing of contact, the current signal of sensor output CH1 is that 2R and 2R are in parallel to earth resistance.
When the active and standby two control systems while insertion systems of A, B, also all power, normally closed relay K1A has electricity so, and normally closed relay K1A contact disconnects; Normally opened relay K2A does not have electricity, and normally opened relay K2A often opens contact, and A control system resistance is got 2R; B control system is with A control system, and resistance is also got 2R, and after active and standby two control system parallel connections, resistance is R.
A system cut-off in active and standby two control systems of A, B, power-off control system normally closed relay K1A does not have electricity, and normally closed relay K1A contact disconnects; Normally opened relay K2A does not have electricity, and normally opened relay K2A often opens contact; Power-off control system resistance is not got 2R; Normally closed relay K1B and the normally opened relay K2B of power-off control system do not have electricity, and normally opened relay K2B often opens contact, and power-off control system resistance is got 2R; After active and standby two control system parallel connections, resistance is also R.
After extracting a control system, not extract control system normally closed relay K1A and do not have electricity, normally closed relay K1A contact is normally closed; Normally opened relay K2A has electricity, the normally opened relay K2A closing of contact; Do not extract control system resistance and get R; Extract control system and be equivalent to infinity, after active and standby two control system parallel connections, resistance is still R.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the schematic diagram of circuit of the present invention.
Embodiment
In order to realize when active and standby two control systems change, current signal Acquisition Circuit is carried out to self-adapting load coupling.The invention provides a kind of self-adapting load matching current and gather commutation circuit, this device can, when active and standby two control system change, be done adaptive coupling to the load of current signal Acquisition Circuit.
The technical scheme of apparatus of the present invention is:
As shown in Figure 1, CH1 is the current signal output of a sensor, in order to meet analog-digital conversion a/d to voltage sample, adopts resistance R to carry out the conversion of current/voltage.K1A, K1B are normally closed relays, and K2A, K2B are normally opened relays.
In Fig. 1, A, B two control systems are detections in place in conjunction with the line that goes out to extend to the other side physically.Be to connect a wire between two pins of A control system, when A control system is in place, the power supply of B control system enters from one end, and another brings out, the energising of B control system; When A control system is not in place, B control system power path is disconnected, the power-off of B control system, and whether B control system A control system to be detected in place like this, and vice versa.
When the A control system ZhongK2A contact of Fig. 1 disconnects, the current signal of sensor output CH1 is 2R to earth resistance, and during the normally opened relay K2A closing of contact, the current signal of sensor output CH1 is that 2R and 2R are in parallel to earth resistance, is R.B control system is with A control system.
When the active and standby two control systems while insertion systems of A, B, also all power, normally closed relay K1A has electricity so, and normally closed relay K1A contact disconnects; Normally opened relay K2A does not have electricity, and normally opened relay K2A often opens contact, and A control system resistance is got 2R; B control system is with A control system, and resistance is also got 2R, and after active and standby two control system parallel connections, resistance is R.
A system cut-off in active and standby two control systems of A, B, supposes the power-off of B control system, and A control system normally closed relay K1A has electricity, and normally closed relay K1A contact disconnects; Normally opened relay K2A does not have electricity, and normally opened relay K2A often opens contact; A control system resistance is got 2R; Normally closed relay K1B and the normally opened relay K2B of B control system do not have electricity, and normally opened relay K2B often opens contact, and B control system resistance is got 2R; After active and standby two control system parallel connections, resistance is also R.When the power-off of A control system, situation is the same with B control system.
After extracting a control system, suppose that B control system extracts, A control system normally closed relay K1A does not have electricity, and normally closed relay K1A contact is normally closed; Normally opened relay K2A has electricity, the normally opened relay K2A closing of contact; A control system resistance is got R; B control system is equivalent to infinity, and after active and standby two control system parallel connections, resistance is still R.When A control system is extracted, situation is the same with B control system.
Fig. 1 has illustrated the situation of a passage.When port number increases, the switch passage of change normally opened relay K2 relay can be realized.
The design's technique effect is: circuit design is simple, adopts relay few, and cost is low.Circuit self-adaptation is carried out load matched, without manual intervention.
The present invention is not limited to embodiment discussed above.Above the description of embodiment is intended in order to describe and illustrate the technical scheme the present invention relates to.Apparent conversion based on the present invention enlightenment or substitute and also should be considered to fall into protection scope of the present invention.Above embodiment is used for disclosing best implementation method of the present invention, so that those of ordinary skill in the art can apply numerous embodiments of the present invention and multiple alternative reaches object of the present invention.
Claims (5)
1. a self-adapting load matching current gathers commutation circuit; It is characterized in that, comprise A, B two control systems;
Between two pins of A control system, connect a wire;
When A control system is in place, the power supply of B control system enters from one end, and another brings out, the energising of B control system;
When A control system is not in place, B control system power path is disconnected, the power-off of B control system, and whether B control system detects A control system in place.
2. self-adapting load matching current as claimed in claim 1 gathers commutation circuit, it is characterized in that, when A control system ZhongK2A contact disconnects, the current signal output CH1 of sensor is 2R to earth resistance, during the normally opened relay K2A closing of contact, the current signal of sensor output CH1 is that 2R and 2R are in parallel to earth resistance.
3. self-adapting load matching current as claimed in claim 1 gathers commutation circuit, it is characterized in that, when the active and standby two control systems while insertion systems of A, B, also all powers, and normally closed relay K1A has electricity so, and normally closed relay K1A contact disconnects; Normally opened relay K2A does not have electricity, and normally opened relay K2A often opens contact, and A control system resistance is got 2R; B control system is with A control system, and resistance is also got 2R, and after active and standby two control system parallel connections, resistance is R.
4. self-adapting load matching current as claimed in claim 1 gathers commutation circuit, it is characterized in that, and the system cut-off in active and standby two control systems of A, B, power-off control system normally closed relay K1A does not have electricity, and normally closed relay K1A contact disconnects; Normally opened relay K2A does not have electricity, and normally opened relay K2A often opens contact; Power-off control system resistance is not got 2R; Normally closed relay K1B and the normally opened relay K2B of power-off control system do not have electricity, and normally opened relay K2B often opens contact, and power-off control system resistance is got 2R; After active and standby two control system parallel connections, resistance is also R.
5. self-adapting load matching current as claimed in claim 1 gathers commutation circuit, it is characterized in that, after extracting a control system, do not extract control system normally closed relay K1A and do not have electricity, normally closed relay K1A contact is normally closed; Normally opened relay K2A has electricity, the normally opened relay K2A closing of contact; Do not extract control system resistance and get R; Extract control system and be equivalent to infinity, after active and standby two control system parallel connections, resistance is still R.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310473206.1A CN103513087B (en) | 2013-10-11 | 2013-10-11 | Self-adapting load matching current gathers switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310473206.1A CN103513087B (en) | 2013-10-11 | 2013-10-11 | Self-adapting load matching current gathers switching circuit |
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| Publication Number | Publication Date |
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| CN103513087A true CN103513087A (en) | 2014-01-15 |
| CN103513087B CN103513087B (en) | 2016-08-17 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101102177A (en) * | 2007-08-20 | 2008-01-09 | 杭州华三通信技术有限公司 | An implementation method and device for switching master and slave controller |
| CN201269207Y (en) * | 2008-10-13 | 2009-07-08 | 何付才 | Intelligent gap type double-fan switching device |
| US20100007327A1 (en) * | 2008-07-11 | 2010-01-14 | Advantest Corporation | Measurement apparatus, test apparatus and measurement method |
| CN101860316A (en) * | 2010-05-26 | 2010-10-13 | 天津市华萌科技有限公司 | Self-adaptive load following control technical system |
| CN201877880U (en) * | 2010-08-05 | 2011-06-22 | 西安陕鼓动力股份有限公司 | Motor controlled switching circuit for primary/standby equipment |
| CN102539869A (en) * | 2012-02-23 | 2012-07-04 | 华为技术有限公司 | Current detecting device and method |
-
2013
- 2013-10-11 CN CN201310473206.1A patent/CN103513087B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101102177A (en) * | 2007-08-20 | 2008-01-09 | 杭州华三通信技术有限公司 | An implementation method and device for switching master and slave controller |
| US20100007327A1 (en) * | 2008-07-11 | 2010-01-14 | Advantest Corporation | Measurement apparatus, test apparatus and measurement method |
| CN201269207Y (en) * | 2008-10-13 | 2009-07-08 | 何付才 | Intelligent gap type double-fan switching device |
| CN101860316A (en) * | 2010-05-26 | 2010-10-13 | 天津市华萌科技有限公司 | Self-adaptive load following control technical system |
| CN201877880U (en) * | 2010-08-05 | 2011-06-22 | 西安陕鼓动力股份有限公司 | Motor controlled switching circuit for primary/standby equipment |
| CN102539869A (en) * | 2012-02-23 | 2012-07-04 | 华为技术有限公司 | Current detecting device and method |
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| CN103513087B (en) | 2016-08-17 |
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