CN102457247A - Outer adapter - Google Patents
Outer adapter Download PDFInfo
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- CN102457247A CN102457247A CN2010106014851A CN201010601485A CN102457247A CN 102457247 A CN102457247 A CN 102457247A CN 2010106014851 A CN2010106014851 A CN 2010106014851A CN 201010601485 A CN201010601485 A CN 201010601485A CN 102457247 A CN102457247 A CN 102457247A
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Abstract
An outer adapter can feasibly detect switching on/off state of a two-wire type electronic switch through a circuit with little power consumption. The outer adapter (11) is provided with two input terminals (12,13) which are connected with an electronic switch (1). Voltage dividing resistors (R1,R2) perform voltage dividing on input voltage. According to the voltage over two ends of the voltage dividing resistor (R2), a photoelectric coupler (14) detects the switching on/off state of the electronic switch (1). An impedance adjusting circuit (19) is provided with the following components: an adjusting resistor (R3) which is equipped between the input terminals (12,13), a transistor (Q1) which responds to output of the photoelectric coupler (14) and switches to switch on/off the adjusting resistor (R3), and a photoelectric MOS relay (18). Input impedance of the adapter (11) is adjusted to a relatively high value at a contact conduction state of the electronic switch (1), and is adjusted to a relatively low value at a contact non-conduction state.
Description
Technical field
The present invention relates to a kind ofly externally detect the contact point signal of two-wire system electronic switch and construct the external adapter of various systems.
Background technology
The two-wire system electronic switch that uses in lighting switch, the human body sensor etc. is as shown in Figure 5 usually, with two terminals 2,3 be used for contact point signal output, and the power supply of control circuit 5 supplied with.Thyristors such as the contact 4 widely-used bidirectional thyristors of electronic switch 1, thyristor.Thyristor need not to take into account the contact wearing and tearing, has the advantage of the circuital current in the time of can reducing conducting.And as shown in Figure 6, when electronic switch 1 is connected, utilize the non-conduction angle of switch element, also can power supply be provided to control circuit 5.
In this electronic switch 1, under the off-state of disconnecting consumers circuit,, power supply have faint electric current to flow because of being provided to control circuit 5.All the time, utilize this electric current to be in the public eye from the external adapter of the on/off state of external detection or demonstration electronic switch 1.For example, external adapter 51 shown in Figure 7 is according to the variation that is applied to the voltage of two input terminals 52,53, the on/off state of photoelectrical coupler 54 detected electrons switches 1.
In addition, patent documentation 1 has been put down in writing following technology: with external adapter that the piston position detecting sensor (electronic switch) of fluid-pressure cylinder is connected in, utilize the voltage that is applied to two input terminals, show the on/off state of transducer through LED.
Patent documentation 1: TOHKEMY 2005-135871 communique
And in existing external adapter 51,, connect fictitious load 55 to photoelectrical coupler 54 for the on/off state of detected electrons switch 1, to form circuit.But must be greater than the impedance of electronic switch 1 time, as shown in Figure 8, the voltage of electronic switch 1 reduces, and can't enough power supplys be provided to control circuit 5 with the impedance setting of fictitious load 55.And, the impedance setting of fictitious load 55 must be low the time, be needed to use the big parts of rated power, power consumption increases, and is uneconomical.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of external adapter that can detect the on/off state of electronic switch effectively through the circuit of little power consumption.
For solving above-mentioned problem, a kind of external adapter of the present invention is characterized in that having: two input terminals are connected to the electronic switch of the two-wire system with thyristor; Detector, according to the variation of the voltage that is applied to input terminal, the on/off state of detected electrons switch; And impedance adjustment circuit, under the state of thyristor conducting, the impedance between the input terminal is adjusted into higherly relatively, under the non-conduction state of thyristor, be adjusted into the impedance between the input terminal relatively low.
And external adapter of the present invention is characterised in that above-mentioned impedance adjustment circuit comprises: impedance adjustment resistor is installed between the input terminal; And switch block, in response to the output of detector, switch energising/outage, can adjust input impedance automatically to impedance adjustment resistor.
Further; External adapter of the present invention is characterised in that; Also have the 1st voltage grading resistor and the 2nd voltage grading resistor that the voltage that is applied to above-mentioned input terminal are carried out dividing potential drop; Above-mentioned detector is according to the on/off state of the voltage detected electrons switch of the 2nd voltage grading resistor, can go out the on/off state of electronic switch through simple structure detection.
At this moment, in order to reduce power consumption, preferably set the resistance value of the 1st voltage grading resistor less than the resistance value of impedance adjustment resistor.
According to external adapter of the present invention, when the thyristor of electronic switch was nonconducting state, adjustment input impedance made it less than conducting state, but therefore moment improve the voltage of electronic switch, to its control circuit enough power supplys are provided.And under the conducting state of thyristor, the input impedance of adjustment adapter makes it greater than nonconducting state, therefore can limit the electric current that flow into adapter, suppresses power consumption, can keep watch on the on/off state of electronic switch economically.
Description of drawings
Fig. 1 is the electrical circuit diagram of the external adapter of expression an embodiment of the invention.
Fig. 2 is the oscillogram of the action of the adapter under the expression electronic switch on-state.
Fig. 3 is the oscillogram of the action of the adapter under the expression electronic switch off-state.
The oscillogram of the action of the adapter when Fig. 4 is non-connect of expression contact.
Fig. 5 is the electrical circuit diagram that the generality of expression electronic switch constitutes.
Fig. 6 is the oscillogram of the action of expression thyristor.
Fig. 7 is the electrical circuit diagram of the existing external adapter of expression.
Fig. 8 is meant the oscillogram of the problem points of the external adapter that has.
Embodiment
Following according to description of drawings execution mode of the present invention.As shown in Figure 1, the external adapter 11 of this execution mode has: two input terminals 12,13 that are connected to electronic switch 1; According to the change in voltage that is applied to input terminal 12,13, the photoelectrical coupler 14 of the on/off of detected electrons switch 1 (ON/OFF) state.In addition, electronic switch 1 is provided with contact 4 and control circuit 5 (with reference to Fig. 5), and contact 4 uses thyristor.
The secondary side transistor 14b of portion of photoelectrical coupler 14 exports Hi (height) voltage under the nonconducting state of the primary side LED 14a of portion, under the conducting state of the 14a of LED portion, export Lo (low) voltage.The output of photoelectrical coupler 14 is input in the microcomputer 15, and microcomputer 15 is sent to the on/off state of electronic switch 1 via telecommunication circuit 16 system equipment (omitting diagram) of outside.Therefore, according to contact information, can move various systems such as illumination, air-conditioning conscientiously from external adapter 11.
And the secondary side transistor 14b of portion of photoelectrical coupler 14 is connected to the base stage of transistor Q1 via buffer 17.The collector electrode of transistor Q1 is connected to the 18a of LED portion of photoelectricity MOS relay 18, and the 18b of MOSFET portion of photoelectricity MOS relay 18 is at input terminal 12, be connected in series with impedance adjustment resistor R 3 between 13.And,, constitute the impedance adjustment circuit 19 that input terminal 12, input impedance between 13 are adjusted through transistor Q1, photoelectricity MOS relay 18 and adjustment resistance R 3.
That is, when the contact 4 of electronic switch 1 was conducting state, as switch block, transistor Q1 ended in response to the Lo voltage of photoelectrical coupler 14, and photoelectricity MOS relay 18 cuts off to 3 energisings of impedance adjustment resistor R, and input impedance phase is to adjusting higherly.And, under the nonconducting state of contact 4, transistor Q1 conducting in response to the Hi voltage of photoelectrical coupler 14, photoelectricity MOS relay 18 allows to 3 energisings of impedance adjustment resistor R, when input impedance is adjusted to such an extent that be lower than the contact connection.
In addition; To the energising of resistor R 3 when electronic switch 1 breaks off and contact allow when non-conduction, but no matter under which kind of situation, the electric current that flow into resistor R 3 is restricted in electronic switch 1 one sides; Therefore resistor R 3 is used the little element of resistance value, can suppress the power consumption of impedance adjustment circuit 19.And,, can further reduce power consumption through the resistance value of the 1st voltage grading resistor R1 being set less than the resistance value of resistor R 3.External adapter 11 has power circuit 20, to microcomputer 15 and telecommunication circuit 16 operation voltage is provided, and to photoelectrical coupler 14 and photoelectricity MOS relay 18 power source voltage Vcc is provided.
The effect of the external adapter 11 of said structure then is described.As shown in Figure 2, when electronic switch 1 was connected, the voltage of input terminal 12,13 that is applied to external adapter 11 was bigger, and the voltage of the 2nd voltage grading resistor R2 surpasses the forward voltage Vf of the primary side LED 14a of portion of photoelectrical coupler 14.Therefore, when the contact conducting of electronic switch 1, the secondary side transistor 14b of portion conducting, output Lo voltage, through the Lo voltage of photoelectrical coupler 14, transistor Q1 ends, and photoelectricity MOS relay 18 becomes nonconducting state.
When electronic switch 1 during at non-conduction angle, the voltage of input terminal 12,13 that is applied to external adapter 11 is less, and the voltage of the 2nd voltage grading resistor R2 is less than the forward voltage Vf of the primary side LED 14a of portion of photoelectrical coupler 14.Therefore, the not conducting of the secondary side transistor 14b of portion of photoelectrical coupler 14, output Hi voltage, through the Hi voltage of photoelectrical coupler 14, transistor Q1 conducting, photoelectricity MOS relay 18 becomes conducting state.
As shown in Figure 3, when electronic switch 1 breaks off, flow through the source current that makes the required value of its control circuit 5 (with reference to Fig. 5) action.Through this electric current, apply small voltage to the input terminal 12,13 of external adapter 11, the voltage of the 2nd voltage grading resistor R2 is less than the forward voltage Vf of the primary side LED 14a of portion of photoelectrical coupler 14.Therefore, the not conducting of the secondary side transistor 14b of portion of photoelectrical coupler 14 keeps Hi voltage.And because of photoelectrical coupler 14 keeps Hi voltage, so transistor Q1 conducting, photoelectricity MOS relay 18 keeps conducting state.
As shown in Figure 4, when the contact 4 (thyristor) of electronic switch 1 was nonconducting state, the secondary side output voltage of photoelectrical coupler 14 became Hi, and transistor Q1 conducting allows to 3 energisings of impedance adjustment resistor R.And electric current flow in the adjustment resistor R 3 of resistance value less than voltage grading resistor R1, R2, and the input impedance of external adapter 11 reduces.Consequently, but moment improve the voltage of electronic switch 1, to control circuit 5 enough power supplys are provided.
On the other hand, when the contact 4 of electronic switch 1 was conducting state, the secondary side output voltage of photoelectrical coupler 14 became Lo, and transistor Q1 ends, and cut off to 3 energisings of impedance adjustment resistor R.And electric current flow into voltage grading resistor R1, R2, and the input impedance of external adapter 11 increases.Consequently, limit the electric current that flow into external adapter 11, suppress power consumption, can keep watch on the on/off state of electronic switch 1 economically through two voltage grading resistor R1, R2.
The invention is not restricted to above-mentioned execution mode, in the scope that does not break away from inventive concept, can suitably change the formation of impedance adjustment circuit or the kind and the enforcement of circuit element.
Claims (4)
1. external adapter is characterized in that having:
Two input terminals are connected to the electronic switch of the two-wire system with thyristor;
Detector is according to the on/off state of the change-detection electronic switch of the voltage that is applied to input terminal; And
Impedance adjustment circuit is adjusted into the impedance between the input terminal higherly relatively under the state of thyristor conducting, under the non-conduction state of thyristor, is adjusted into the impedance between the input terminal relatively low.
2. external adapter according to claim 1 is characterized in that,
Above-mentioned impedance adjustment circuit comprises: impedance adjustment resistor is installed between the input terminal; With
Switch block switches energising/outage of impedance being adjusted resistor in response to the output of detector.
3. external adapter according to claim 1 and 2 is characterized in that,
Said external adapter also has the 1st voltage grading resistor and the 2nd voltage grading resistor that the voltage that is applied to above-mentioned input terminal is carried out dividing potential drop,
Above-mentioned detector is according to the on/off state of the voltage detected electrons switch of the 2nd voltage grading resistor.
4. external adapter according to claim 3 is characterized in that,
The resistance value of above-mentioned the 1st voltage grading resistor is set at the resistance value less than impedance adjustment resistor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-238613 | 2010-10-25 | ||
| JP2010238613A JP2012094980A (en) | 2010-10-25 | 2010-10-25 | External adapter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102457247A true CN102457247A (en) | 2012-05-16 |
Family
ID=46040005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106014851A Pending CN102457247A (en) | 2010-10-25 | 2010-12-20 | Outer adapter |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2012094980A (en) |
| CN (1) | CN102457247A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067901A (en) * | 2014-04-24 | 2015-11-18 | 台湾快捷国际股份有限公司 | Method and circuit of detecting attachment and detachment between a portable device and a power converter |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535924A (en) * | 2014-12-30 | 2015-04-22 | 宁波三星电气股份有限公司 | Relay state detection processing circuit and detection processing method of relay state detection processing circuit |
| CN109254245B (en) * | 2018-11-07 | 2020-12-01 | 紫光测控有限公司 | Relay loop short circuit and open circuit detection circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85106595A (en) * | 1985-09-03 | 1987-03-25 | 郭万锁 | Portable tool kit for motor vehicles |
| CN101149596A (en) * | 2006-09-22 | 2008-03-26 | 何曙光 | Super low-power consumption stand-by circuit |
| WO2010075528A2 (en) * | 2008-12-23 | 2010-07-01 | Lightwedge Llc | Energy efficient power adapter |
-
2010
- 2010-10-25 JP JP2010238613A patent/JP2012094980A/en active Pending
- 2010-12-20 CN CN2010106014851A patent/CN102457247A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85106595A (en) * | 1985-09-03 | 1987-03-25 | 郭万锁 | Portable tool kit for motor vehicles |
| CN101149596A (en) * | 2006-09-22 | 2008-03-26 | 何曙光 | Super low-power consumption stand-by circuit |
| WO2010075528A2 (en) * | 2008-12-23 | 2010-07-01 | Lightwedge Llc | Energy efficient power adapter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067901A (en) * | 2014-04-24 | 2015-11-18 | 台湾快捷国际股份有限公司 | Method and circuit of detecting attachment and detachment between a portable device and a power converter |
| CN105067901B (en) * | 2014-04-24 | 2018-07-17 | 台湾快捷国际股份有限公司 | The method and circuit that connection between detection portable apparatus and power converter is pulled out |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012094980A (en) | 2012-05-17 |
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Application publication date: 20120516 |