CN103529341B - Remote control circuit testing circuit for negative control terminal - Google Patents
Remote control circuit testing circuit for negative control terminal Download PDFInfo
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- CN103529341B CN103529341B CN201310533336.XA CN201310533336A CN103529341B CN 103529341 B CN103529341 B CN 103529341B CN 201310533336 A CN201310533336 A CN 201310533336A CN 103529341 B CN103529341 B CN 103529341B
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Abstract
The invention discloses a kind of remote control circuit testing circuit for negative control terminal; including remote control output relay, CPU, protection circuit, rectification circuit, one-level optocoupler testing circuit and detection signal output apparatus; the normally opened contact end of remote control output relay is connected with protection circuit; protection circuit is connected with rectification circuit; rectification circuit is connected with one-level optocoupler testing circuit; one-level optocoupler testing circuit is connected with detection signal output apparatus, and detection signal output apparatus is connected with the I/O port of CPU.The present invention is connected between the normally opened contact end of remote control output relay and common end.The present invention need not external equipment feedback signal, just can know that whether normal the state in loop is in advance, and ensured that terminal trip operation can normally perform before remote control performs.Circuit of the present invention is simple, takes up room little；Realize simple and reliable, with low cost.
Description
Technical field
The present invention relates to a kind of remote control circuit testing circuit, particularly to a kind of remote control circuit testing circuit for negative control terminal.
Background technology
At present, terminal learns, by the remote signals of outside execution equipment feedback, the execution state that remote control exports.The shortcoming of this mode is to learn in advance the state of remote control circuit, it is impossible to judges the correctness in loop in advance, only just can learn concrete condition after remote control performs.
Summary of the invention
It is an object of the invention to provide a kind of for terminal provide remote control circuit state and need not external equipment provide feedback signal the remote control circuit testing circuit for negative control terminal.
This remote control circuit testing circuit for negative control terminal that the present invention provides; including remote control output relay, CPU, protection circuit, rectification circuit, optocoupler testing circuit and detection signal output apparatus; remote control output relay is connected with protection circuit; protection circuit is connected with rectification circuit; rectification circuit is connected with optocoupler testing circuit; optocoupler testing circuit is connected with detection signal output apparatus, and detection signal output apparatus is connected with the I/O port of CPU.
One input of described rectification circuit is connected with the normally opened contact end of described remote control output relay by protection circuit, and another input of this rectification circuit is connected with the common end of described remote control output relay.Described optocoupler testing circuit uses the secondary light coupling testing circuit including that the one-level optocoupler testing circuit of an optocoupler or employing include two optocouplers.Described protection circuit includes thermistor and some divider resistances.Described rectification circuit uses full-wave rectification bridge-type circuit.Described one-level optocoupler testing circuit includes one-level optocoupler, an output resistance and a detection electric capacity.Described secondary light coupling testing circuit includes one-level optocoupler, secondary light coupling, an output resistance, a triode and a detection electric capacity.Described one-level optocoupler uses diode drive current no more than 0.5mA, current transfer ratio not less than 300% and pressure voltage meets the optocoupler of 4kV.Described output resistance uses the resistance resistance not less than 100k Ω.Described detection electric capacity uses the polarity free capacitor being not more than 1 μ F.
The present invention is connected between the normally opened contact end of remote control output relay and common end.The present invention need not external equipment feedback signal, just can know that whether normal the state in loop is in advance, and ensured that terminal trip operation can normally perform before remote control performs.Owing to have employed rectifier circuit, when DC equipment is accessed in outside when, the present invention can ignore the positive reversed polarity of access, normally detect.Circuit of the present invention is simple, takes up room little；Realize simple and reliable, with low cost.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the present invention.
Fig. 2 is a kind of detailed description of the invention circuit diagram of the present invention.
Fig. 3 is the cut-away view of the one-level optocoupler of the present invention.
Detailed description of the invention
One end of the present invention is connected with the normally opened contact end of remote control output relay, and the other end is connected with the common end of this relay.
The present invention includes remote control output relay, CPU, protection circuit, rectification circuit, optocoupler testing circuit and detection signal output apparatus.
Existing equipment is connected with the normally opened contact of remote control output relay: the normally opened contact end of remote control output relay is connected with an input of rectification circuit by protection circuit, and the common end of this relay is connected with another input of rectification circuit；The output of rectification circuit is connected with the input of optocoupler testing circuit, and the output of optocoupler testing circuit is connected with the input of detection signal output apparatus, and the output of detection signal output apparatus is connected with the I/O port of CPU.
The optocoupler testing circuit of the present invention can use the optocoupler testing circuit only including 1 optocoupler, it is possible to uses the optocoupler testing circuit including 2 optocouplers.
As it is shown in figure 1, the present invention includes remote control output relay, CPU, protection circuit, rectification circuit, one-level optocoupler testing circuit, secondary light coupling testing circuit and detection signal output apparatus.
The normally opened contact end of remote control output relay is connected with an input of rectification circuit by protection circuit, and the common end of this relay is connected with another input of rectification circuit；The output of rectification circuit is connected with one-level optocoupler testing circuit, one-level optocoupler testing circuit is connected with secondary light coupling testing circuit, secondary light coupling testing circuit is connected with the input of detection signal output apparatus, and the output of detection signal output apparatus is connected with the I/O port of CPU.
Protection circuit has overcurrent protection, prevents rear end fault from affecting whole remote control circuit.
The effect of rectification circuit is primarily directed to remote control equipment power supply when be direct current, and after over commutation, no matter the wiring of external remote control equipment connects and just connecing negative, and what remote control circuit can be correct detects loop state.
As a example by normally opened contact: assume that the most conventional remote control equipment power supply has two kinds, exchange 220/380V or direct current 24V-100V.If remote control circuit is normal, then exist for voltage between the normally opened contact of relay, voltage range is at AC220/380V ± 20% or DC24V-100V.
Voltage is through there being the protection circuit of overcurrent protection; after being then passed through a series of voltage; first order optocoupler is entered again via rectification circuit; drive the LEDs ON of this optocoupler; then the signal of this one-level optocoupler drives the LEDs ON of second level optocoupler, and finally the output signal of this secondary light coupling is input to the I/O port of CPU.Now, according to initial state, CPU judges which kind of state current remote control circuit is in.When external remote control equipment is connected with alternating current equipment when, the signal of the I/O port inputing to CPU is square-wave signal；When external remote control equipment is connected with DC equipment when, input to the level signal that signal is a normality of the I/O port of CPU.
Be connected with the normally opened contact of remote control circuit by outside alternating current equipment below, as a example by the employing of optocoupler testing circuit includes the situation of optocoupler testing circuit of 2 optocouplers, the present invention is further illustrated.
As in figure 2 it is shown, the dotted line left side is the equipment that external remote control loop is connect, replace with the relay of exchange at this.The present invention includes relay, external ac power source AC, remote control output relay, thermistor PTC3, voltage dividing resistance circuit, rectifier bridge REC1, optocoupler D9, output resistance R60, optocoupler D10 and triode V17.
Remote control output relay includes the common end COM of normally opened contact end NO, remote control output relay.
Voltage dividing resistance circuit includes resistance R62, resistance R55, resistance R56, resistance R59, resistance R57, resistance R58 and resistance R61.
One end of external ac power source AC is connected with the normally opened contact end NO of remote control output relay, and the other end of this power supply is connected with the common end COM of remote control output relay by relay.Above-mentioned normally opened contact end NO is connected with 1 end of rectifier bridge REC1 by thermistor PTC3 series connection voltage dividing resistance circuit, 2 ends of this rectifier bridge are connected with the common end COM of remote control output relay, its 3 end is connected with 2 pin of optocoupler D9, its 4 end is connected with 3 pin of this optocoupler D9, is further connected with a polarity free capacitor C23 between 3 ends and 4 ends of this rectifier bridge.8 pin of optocoupler D9 are connected by the anode tap of resistance R64 and optocoupler D10；6 pin and 8 pin of optocoupler D9 are all connected with power supply V12P0_ISO；5 pin of this optocoupler D9 pass through output resistance R60 ground connection, and this 5 pin is connected also by the base stage of resistance R54 with triode V17.The colelctor electrode of triode V17 is connected with the cathode terminal of optocoupler D10, its grounded emitter.The collector terminal of optocoupler D10 is connected with power supply V3P3 by resistance R63, and this colelctor electrode is also connected with the I/O pin of CPU, is used for transmitting detection signal detec；It is further connected with a polarity free capacitor C24 between collector terminal and the emitter-base bandgap grading end of this optocoupler D10；The emitter-base bandgap grading end ground connection of this optocoupler D10.
As can be seen from the figure, the loop that external remote control equipment normally works is external ac power source AC, the normally opened contact end NO of remote control output relay, the common end COM of remote control output relay, relay, external ac power source AC, say, that the remote control of outside power supply performs between the normally opened contact that equipment receives remote control output relay.Remote control measure loop is external ac power source AC, the normally opened contact end NO of remote control output relay, thermistor PTC3, resistance R62, resistance R55, resistance R56, resistance R59, resistance R57, resistance R58, resistance R61, rectifier bridge REC1, the common end COM of remote control output relay, relay, external ac power source AC.
During original state, terminal powers on, what equipment is not taken over outside the contact of remote control output relay, there is not power supply in above-mentioned remote control measure loop, optocoupler D9 can not turn on, thus the base stage of triode V17 does not has voltage, triode can not turn on, so optocoupler D10 can not turn on, signal detec is due to the pull-up effect of resistance R63, so the I/O pin of CPU reads in high level signal always in detection.If now outside incoming transport equipment; there is voltage in the most above-mentioned remote control measure loop; voltage is protected by temperature-sensitive and electric resistance partial pressure; then optocoupler D9 is made to turn on by rectifier bridge REC1; produce voltage on output resistance R60, promote triode V17 to turn on, thus optocoupler D10 conducting; optocoupler D10 switched on for detection signal detec moves ground to, and the signal that the I/O pin of CPU reads in becomes low level signal.
Because outside access is 50Hz alternating current equipment, so detection signal detec is a square-wave signal, but dutycycle is not necessarily 1:1, and this is to be determined by the parameter of physical circuit.If what outside connect is direct current signal, then when External Access Equipment and loop are normal time, detection signal detec is a normal low signal.CPU can be by reading the state of detection signal detec, it is judged that current remote control circuit is the most normal；If it is desirable, what CPU also can judge that current external accesses according to this signal is DC equipment or alternating current equipment.
The present invention also has the second circuit implementing scheme, only with an optocoupler.Physical circuit connects: removing optocoupler 10 in Fig. 2, pull-up resistor R63 and power supply V3P3, be connected with 3 pin of triode V17 by 2 pin of resistance R64,3 pin of this triode are connected with the I/O pin of CPU, is used for transmitting detection signal detec.Electric capacity C24 is connected between triode 3 pin and ground.
Have employed triode as shown in Figure 2 at this and drive the scheme of optocoupler.Driving electric current and driving voltage required for triode are the least, so using the mode of triode can not only meet design requirement, the most economic and practical.Therefore, using the embodiment being driven second level optocoupler by triode, the circuit implementation namely using two-stage optocoupler is preferred.
The difficult point of present invention design is: 1. external equipment voltage range is at AC220/380V ± 20% or DC24V-100V, and voltage span is the biggest；2., within the electric current of remote control circuit self 2mA to be limited in, prevent that loop current is excessive causes equipment malfunction to make.Therefore, the present invention needs to work in the case of big voltage and small voltage simultaneously, and guarantees have enough electric currents to promote optocoupler to turn on, could examinations.
In order to solve an above-mentioned difficult problem, the present invention has done following measure.
1. the type selecting of one-level optocoupler and circuit design.
The selection of one-level optocoupler (optocoupler D9 position as shown in Figure 2) at least to meet 3 requirements: its diode to drive galvanic current little, it is proposed that this driving electric current≤0.5mA；Its current transfer ratio (CTR) to be tried one's best greatly, it is proposed that this current transfer ratio >=300%；The pressure voltage of it is pressure 4KV to be met.
These three parameter for one-level optocoupler also to select moderate, if parameter is far superior to such requirement certainly, it is achieved get up to be easier, but device cost is higher, so to consider simultaneously.
One-level optocoupler is except the selection of parameter, also particular importance in circuit design, the output of one-level optocoupler as shown in Figure 3 has a variety of connection, but in order to enable preferably to utilize the characteristic of current transfer ratio, need output resistance to receive on one-level optocoupler pin 5, and pull down to ground.
2. the selection of the output resistance of one-level optocoupler.
After the output resistance wiring position of one-level optocoupler determines, its resistance selects also particular importance.In the present invention, the resistance of this output resistance needs big as far as possible, could form enough driving voltages and drive circuit below small area analysis when on this output resistance.The present invention can use the resistance resistance more than or equal to 100k Ω of output resistance.
3. the selection of the detection electric capacity before one-level optocoupler.
When the capacitance selecting detection electric capacity is less than or equal to 1 μ F, the present invention can provide detection signal to judge that External Access Equipment is alternating current equipment or DC equipment by CPU.
In addition, if need not judge that the equipment of outside access is alternating current equipment or DC equipment, the present invention can be realized by the capacitance (i.e. detecting the capacitance of electric capacity more than 1 μ F) raising detection electric capacity, so exchange input when final output signal can also be adjusted to level signal, rather than square-wave signal；So it is easy to program process；In terms of stabilization or suppression interference, it is provided that more preferable signal guarantee simultaneously.
Claims (7)
1. the remote control circuit testing circuit for negative control terminal; including remote control output relay, CPU; this testing circuit also includes protection circuit, rectification circuit, optocoupler testing circuit and detection signal output apparatus; remote control output relay is connected with protection circuit; protection circuit is connected with rectification circuit; rectification circuit is connected with optocoupler testing circuit, and optocoupler testing circuit is connected with detection signal output apparatus, and detection signal output apparatus is connected with the I/O port of CPU;Described protection circuit includes thermistor and some divider resistances; described optocoupler testing circuit includes optocoupler, an output resistance and a detection electric capacity; described output resistance resistance is not less than 100k Ω; this output resistance receives the GND end of one-level optocoupler; and pull down to ground; the GND end of one-level optocoupler is connected also by the base stage of a resistance R54 and triode V17, is used for controlling remote control circuit electric current within 2mA.
Remote control circuit testing circuit for negative control terminal the most according to claim 1; it is characterized in that; one input of described rectification circuit is connected with the normally opened contact end of described remote control output relay by protection circuit, and another input of this rectification circuit is connected with the common end of described remote control output relay.
Remote control circuit testing circuit for negative control terminal the most according to claim 1, it is characterised in that described optocoupler testing circuit uses the secondary light coupling testing circuit including that the one-level optocoupler testing circuit of an optocoupler or employing include two optocouplers.
Remote control circuit testing circuit for negative control terminal the most according to claim 1, it is characterised in that described rectification circuit uses full-wave rectification bridge-type circuit.
Remote control circuit testing circuit for negative control terminal the most according to claim 3, it is characterised in that described secondary light coupling testing circuit includes one-level optocoupler, secondary light coupling, an output resistance, a triode and a detection electric capacity.
Remote control circuit testing circuit for negative control terminal the most according to claim 5, it is characterised in that described one-level optocoupler uses diode drive current no more than 0.5mA, current transfer ratio not less than 300% and pressure voltage meets the optocoupler of 4kV.
Remote control circuit testing circuit for negative control terminal the most according to claim 5, it is characterised in that described detection electric capacity uses the polarity free capacitor being not more than 1 μ F.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310533336.XA CN103529341B (en) | 2013-11-04 | 2013-11-04 | Remote control circuit testing circuit for negative control terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310533336.XA CN103529341B (en) | 2013-11-04 | 2013-11-04 | Remote control circuit testing circuit for negative control terminal |
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| CN103529341A CN103529341A (en) | 2014-01-22 |
| CN103529341B true CN103529341B (en) | 2016-09-07 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104917403A (en) * | 2015-05-25 | 2015-09-16 | 张家港市华为电子有限公司 | Automatic switching circuit in power supply applicable to 220V and 110V power grids |
| CN113933693B (en) * | 2021-09-28 | 2023-10-20 | 科大智能电气技术有限公司 | Detection circuit suitable for multiple types of opening and closing quantities and control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06294707A (en) * | 1993-04-06 | 1994-10-21 | Honda Motor Co Ltd | Inspection equipment for proximity switch |
| CN1710438A (en) * | 2005-05-30 | 2005-12-21 | 沈阳工业大学 | Apparatus for testing reactance parameter of permanent magnet motor based on small DC attenuation |
| JP2008086113A (en) * | 2006-09-27 | 2008-04-10 | Mitsubishi Electric Corp | Power supply device and method for estimating life thereof |
| CN201508807U (en) * | 2009-09-09 | 2010-06-16 | 朱卫明 | Debugging power supply of bistable relay |
| CN101957413A (en) * | 2010-09-21 | 2011-01-26 | 深圳市华力特电气股份有限公司 | Relay protection device detection circuit |
| CN203519751U (en) * | 2013-11-04 | 2014-04-02 | 长沙威胜信息技术有限公司 | Remote control loop detection circuit for load control terminal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202261002U (en) * | 2011-09-09 | 2012-05-30 | 山东沃森电源设备有限公司 | Conduction control circuit with dummy load resistor inside direct-current power supply |
-
2013
- 2013-11-04 CN CN201310533336.XA patent/CN103529341B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06294707A (en) * | 1993-04-06 | 1994-10-21 | Honda Motor Co Ltd | Inspection equipment for proximity switch |
| CN1710438A (en) * | 2005-05-30 | 2005-12-21 | 沈阳工业大学 | Apparatus for testing reactance parameter of permanent magnet motor based on small DC attenuation |
| JP2008086113A (en) * | 2006-09-27 | 2008-04-10 | Mitsubishi Electric Corp | Power supply device and method for estimating life thereof |
| JP4861784B2 (en) * | 2006-09-27 | 2012-01-25 | 三菱電機株式会社 | Switching power supply |
| CN201508807U (en) * | 2009-09-09 | 2010-06-16 | 朱卫明 | Debugging power supply of bistable relay |
| CN101957413A (en) * | 2010-09-21 | 2011-01-26 | 深圳市华力特电气股份有限公司 | Relay protection device detection circuit |
| CN203519751U (en) * | 2013-11-04 | 2014-04-02 | 长沙威胜信息技术有限公司 | Remote control loop detection circuit for load control terminal |
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