CN105186587A - Active output control method of two-wire system - Google Patents
Active output control method of two-wire system Download PDFInfo
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- CN105186587A CN105186587A CN201510247152.6A CN201510247152A CN105186587A CN 105186587 A CN105186587 A CN 105186587A CN 201510247152 A CN201510247152 A CN 201510247152A CN 105186587 A CN105186587 A CN 105186587A
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- storage capacitor
- active output
- control method
- wire system
- output control
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Abstract
The invention discloses an active output control method of a two-wire system, and aims at solving the problem that a traditional passive control method needs an external power supply. In the active output control method, a bus supplies power to charge an energy storage capacitor via a charging circuit, the charging process can be controlled in a segmented manner according to the detected voltage of the energy-storage capacitor, the charging current is limited, the capacitance of the capacitor can be determined according to the detected step-up rate of the energy-storage capacitor, and the reliability of active output is ensured. Active output control of the energy-storage capacitor can be realized by controlling ON/OFF of a relay.
Description
Technical field
The present invention relates to the active output control field that two-wire system is bus-powered, particularly relate to a kind of control method realizing active output for output module, input/output module etc.
Background technology
Input/output module needs to provide power supply when starting external equipment, and traditional input/output module is passive output, and needing extra provides external power source, because this increasing the length of the circuit laid in application process, causes application cost high.For this problem, propose a kind of active output control method of two-wire system.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of new control method, under solving the bus-powered situation of two-wire system, input/output module startup external equipment needs the problem providing external power source, effective isolation of active output and control appliance can be realized simultaneously and reliably control, reducing the cost in application process.
The invention provides a kind of active output control method of two-wire system, it is characterized in that: powered by two-wire system communication bus, utilize charging circuit to charge to storage capacitor, realized conducting and the shutoff of storage capacitor and outside controlled plant by the break-make of control relay, realize active output and control.The active output control method of two-wire system according to claim 1, it is characterized by: by bus-powered, storage capacitor is charged, and according to the storage capacitor voltage detected to charging process Discrete control, passive output control can be different from and need provide external power source.The active output control method of two-wire system according to claim 2, is characterized by: in storage capacitor charging process, when storage capacitor voltage is lower than bus voltage, does not open PWM boost charge, limits charging current by triode; When storage capacitor voltage equals bus voltage, open PWM boost charge, control boost charge electric current by triode, realize the quick charge of storage capacitor, in turn ensure that the reliable of bus communication simultaneously.According to claim 3, the active output control method of two-wire system, is characterized in that: when not needing to start external equipment, according to the storage capacitor voltage detected, makes storage capacitor voltage maintain a higher set point by charging circuit; Storage capacitor voltage is made to reach the peak of setting fast when needing to carry out boost charge when starting external equipment.In boost charge process, according to the bus voltage detected and storage capacitor Voltage Cortrol boosting PWM duty ratio, can ensure that charge rate is consistent, improve boosting efficiency; And the speed that can raise according to storage capacitor voltage in boost charge process judges capacitance, ensures the reliability of active output.
Accompanying drawing explanation
In order to be illustrated more clearly in the present invention's technical scheme of the prior art, be briefly described to the accompanying drawing used required in description of the prior art below.In the accompanying drawings:
Fig. 1 is energy storage capacitor charging circuit;
Fig. 2 is voltage detecting circuit;
Fig. 3 is active output control circuit;
Fig. 4 is active output control flow.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with embodiment of the present invention accompanying drawing, description clear, complete is further done to the technical scheme in the present invention.Based on the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The active output control method of two-wire system provided by the invention, it is characterized in that: powered by two-wire system communication bus, utilize charging circuit to charge to storage capacitor, realized conducting and the shutoff of storage capacitor and outside controlled plant by the break-make of control relay, realize active output and control.With reference to accompanying drawing 1 energy storage capacitor charging circuit, single-chip microcomputer carries out scanning sample to storage capacitor voltage and obtains magnitude of voltage, when magnitude of voltage is directly charged by bus voltage lower than during bus voltage; When magnitude of voltage is equal to or higher than bus voltage value, control a metal-oxide-semiconductor by Single Chip Microcomputer (SCM) PWM mouth and PWM boost charge is carried out to storage capacitor, simultaneously can according to bus voltage and storage capacitor voltage-regulation PWM duty ratio, guarantee charge rate is consistent, and can judge storage capacitor capacity according to storage capacitor voltage increase rate in boost charge process.With reference to accompanying drawing 2 voltage detecting circuit, in charging process, by single-chip microcomputer, AD sampling is carried out to storage capacitor voltage and bus voltage, according to the storage capacitor voltage detected and bus voltage, Discrete control is carried out to charging process.With reference to the active output control circuit of accompanying drawing 3, by Single-chip Controlling metal-oxide-semiconductor, relay is controlled, thus realize the control to the active output of storage capacitor.Simultaneously by controlling the size of current in the base current restriction charging process of triode.With reference to the active output control flow of accompanying drawing 4, according to voltage detecting circuit, bus voltage and storage capacitor voltage are sampled, according to the magnitude of voltage obtained, charging process is carried out to storage capacitor; Realize the control to relay by relay drive circuit, thus realize the control of the active output of storage capacitor.
In sum, controlled by the active output of two-wire system, overcome traditional output module, passive outputs of input/output module application controls to need to provide outside to provide the problem of power supply, reduce the cost in application process, ensure that the reliability of communication and control simultaneously.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. the active output control method of a two-wire system, it is characterized in that: powered by two-wire system communication bus, utilize charging circuit to charge to storage capacitor, realized conducting and the shutoff of storage capacitor and outside controlled plant by the break-make of control relay, realize active output and control.
2. the active output control method of two-wire system according to claim 1, is characterized in that: powered by communication bus and to charge to storage capacitor, and can according to the storage capacitor voltage detected to charging process Discrete control.
3. the active output control method of two-wire system according to claim 2, is characterized in that: in storage capacitor charging process, when storage capacitor voltage is lower than bus voltage, does not open PWM boost charge, limits charging current by triode; When storage capacitor voltage is more than or equal to bus voltage, open PWM boost charge, control boost charge electric current by triode.
4. the active output control method of two-wire system according to claim 3, is characterized in that: when not needing to start external equipment, according to the storage capacitor voltage detected, makes storage capacitor voltage maintain a higher set point by charging circuit; Storage capacitor voltage is made to reach the peak of setting fast when needing to carry out boost charge when starting external equipment.
5. the active output control method of two-wire system according to claim 3, is characterized in that: in PWM boost process, according to bus voltage and storage capacitor Voltage Cortrol PWM duty ratio being detected, can ensure that charge rate is consistent, improving boost charge efficiency; And the speed that can raise according to storage capacitor voltage in boost charge process judges capacitance, ensures the reliability of active output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510247152.6A CN105186587A (en) | 2015-05-12 | 2015-05-12 | Active output control method of two-wire system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510247152.6A CN105186587A (en) | 2015-05-12 | 2015-05-12 | Active output control method of two-wire system |
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| Publication Number | Publication Date |
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| CN105186587A true CN105186587A (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510247152.6A Pending CN105186587A (en) | 2015-05-12 | 2015-05-12 | Active output control method of two-wire system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106924925A (en) * | 2017-03-23 | 2017-07-07 | 四川赛科安全技术有限公司 | The active output driving circuit and its implementation of a kind of input/output module |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496904A (en) * | 2011-12-20 | 2012-06-13 | 吴明星 | Self-powered communication-bus short-circuit protection method |
| CN103441569A (en) * | 2013-09-10 | 2013-12-11 | 国家电网公司 | Device and method for monitoring electrical network voltage instant jittering |
| US20140111166A1 (en) * | 2012-10-24 | 2014-04-24 | Samsung Electronics Co., Ltd. | Circuits for charging batteries and boosting voltages of batteries, and methods of charging batteries |
| CN204216600U (en) * | 2014-09-25 | 2015-03-18 | 深圳市大乘科技股份有限公司 | Synchronization lifting piezoelectric battery charging device |
-
2015
- 2015-05-12 CN CN201510247152.6A patent/CN105186587A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496904A (en) * | 2011-12-20 | 2012-06-13 | 吴明星 | Self-powered communication-bus short-circuit protection method |
| US20140111166A1 (en) * | 2012-10-24 | 2014-04-24 | Samsung Electronics Co., Ltd. | Circuits for charging batteries and boosting voltages of batteries, and methods of charging batteries |
| CN103441569A (en) * | 2013-09-10 | 2013-12-11 | 国家电网公司 | Device and method for monitoring electrical network voltage instant jittering |
| CN204216600U (en) * | 2014-09-25 | 2015-03-18 | 深圳市大乘科技股份有限公司 | Synchronization lifting piezoelectric battery charging device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106924925A (en) * | 2017-03-23 | 2017-07-07 | 四川赛科安全技术有限公司 | The active output driving circuit and its implementation of a kind of input/output module |
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Application publication date: 20151223 |
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