CN202275144U - Relay contact detection apparatus - Google Patents
Relay contact detection apparatus Download PDFInfo
- Publication number
- CN202275144U CN202275144U CN2011203625622U CN201120362562U CN202275144U CN 202275144 U CN202275144 U CN 202275144U CN 2011203625622 U CN2011203625622 U CN 2011203625622U CN 201120362562 U CN201120362562 U CN 201120362562U CN 202275144 U CN202275144 U CN 202275144U
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- Prior art keywords
- relay
- contact
- double
- pin
- transistor array
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Abstract
The utility model discloses a relay contact detection apparatus, including a first double-contact relay, a second double-contact relay, an optoelectronic coupler and a Darlington array. The second output terminal of the first double-contact relay and the second output terminal of the second double-contact relay are respectively connected with the optoelectronic coupler; a first power supply is connected with the first normal open contact of the first double-contact relay and the first normal open contact of the second double-contact relay; the second normal open contact of the first double-contact relay and the second normal open contact of the second double-contact relay are connected to the ground; the first output terminal of the first double-contact relay and the first output terminal of the second double-contact relay are connected with Darlington array; and the Darlington array is respectively connected with the relay solenoids of the first double-contact relay and the second double-contact relay. According to the utility model, which relay is damaged can be accurately found, and the failure mode thereof can be found.
Description
Technical field
The utility model relates to relay, relates in particular to the relay contact detection device.
Background technology
Being of wide application of relay, major function are as electronic switch, the output of control signal and disconnection.Relay reliability is very high, but is difficult to avoid Problem of Failure to take place, and a kind of failure mode had become normally opened contact for the relay normally closed contact loses efficacy, and caused signal that output is arranged always; Another kind of pattern causes signal to export for the relay normally closed contact can not be closed.Usually can adopt two relay parallel connections to use in practical application, to increase fiduciary level, the third appears in failure mode like this, a relay damaged, and the another relay is intact, still can't detect fully in this case.
Summary of the invention
To the problems referred to above that exist in the prior art, the utility model provides the relay contact detection device.
The utility model provides the relay contact detection device, comprising: first double-contact relay, second double-contact relay, photoelectrical coupler and Darlington transistor array; Second output terminal of first double-contact relay is connected with photoelectrical coupler respectively with second output terminal of second double-contact relay; First power supply is connected the second normally opened contact ground connection of second normally opened contact of first double-contact relay and second double-contact relay with first normally opened contact of first double-contact relay and first normally opened contact of second double-contact relay; First output terminal of first double-contact relay is connected with the Darlington transistor array with first output terminal of second double-contact relay, and the Darlington transistor array also is connected with the relay line bag of first double-contact relay and the relay line bag of second double-contact relay respectively.
In one example, the 1st pin and the 2nd pin of Darlington transistor array link together, and the output terminal of the output terminal of first double-contact relay and second double-contact relay all is connected with the 2nd pin with the 1st pin of Darlington transistor array; The 8th pin ground connection of Darlington transistor array; The 9th pin of Darlington transistor array connects first power supply; The 16th pin of Darlington transistor array connects first power supply through the relay line bag of first double-contact relay, and the 15th pin of Darlington transistor array connects first power supply through the relay line bag of second double-contact relay.
In one example; Also comprise first diode and second diode, the 16th pin of Darlington transistor array connects the anode of first diode, and the negative electrode of first diode connects first power supply; The 15th pin of Darlington transistor array connects the anode of second diode, and the negative electrode of second diode connects first power supply.
In one example, second output terminal of first double-contact relay is connected with the 2nd pin of photoelectrical coupler, and second output terminal of second double-contact relay is connected with the 4th pin of photoelectrical coupler.
It is that relay damaged that the utility model can be found out accurately, and finds out its failure mode.
Description of drawings
Come the utility model is done further explain below in conjunction with accompanying drawing, wherein:
Fig. 1 a is a relay line bag driving circuit synoptic diagram;
Fig. 1 b is relay contact detection examples of circuits figure.
Embodiment
Shown in Fig. 1 a; The 1st pin and the 2nd pin of Darlington transistor array (ULN2003AD) N1 meet control signal KK1; The 8th pin ground connection GND of Darlington transistor array N1; The 9th pin of Darlington transistor array N1 connects+the 28V voltage signal, and the 16th pin of Darlington transistor array N1 connects+the 28V voltage signal through relay line bag K1A, and the 16th pin of Darlington transistor array N1 connects the anode of diode V1; The 16th pin of Darlington transistor array N1 connects the anode of diode V1, and the negative electrode of diode V1 connects+the 28V voltage signal; The 15th pin of Darlington transistor array N1 connects+the 28V voltage signal through relay line bag K2A; The 15th pin of Darlington transistor array N1 connects the anode of diode V2; The 15th pin of Darlington transistor array N1 connects the anode of diode V2, and the negative electrode of diode V5 connects+the 28V voltage signal.
Shown in Fig. 1 b ,+28V voltage signal meets first relay (first relay pack vinculum packet portion K1A and the contact part K1B respectively with ground GND; Second relay pack vinculum packet portion K2A and the contact part K2B) normally opened contact (the 5th pin and the 8th pin), the output terminal+DP of first relay (the 3rd pin) and the output terminal+DP (the 3rd pin) of second relay link together; + 28V voltage signal and ground GND connect the normally opened contact (the 5th pin and the 8th pin) of second relay respectively.The contact CS1 of first relay connects the 2nd pin of photoelectrical coupler V3, is parallel with capacitor C 1 and resistance R 3 between the 1st pin of photoelectrical coupler V3 and the 2nd pin, and+5V voltage signal is through the 1st pin of resistance R 1 output photoelectrical coupler V3.The contact CS2 of second relay connects the 4th pin of photoelectrical coupler V3, is parallel with capacitor C 2 and resistance R 4 between the 3rd pin of photoelectrical coupler V3 and the 4th pin, and+5V voltage signal is through the 3rd pin of resistance R 2 output photoelectrical coupler V3.The 6th pin and the 8th pin of photoelectrical coupler V3 meet supply voltage VCC, and the 7th pin of photoelectrical coupler V3 is through resistance R 5 ground connection, and the 8th pin of photoelectrical coupler V3 is through resistance R 6 ground connection; The 7th pin output of photoelectrical coupler V3 is left into amount CSS1, and the 8th pin output of photoelectrical coupler V3 is left into amount CSS2.
The parallel connection of first relay and second relay is used, after first relay and the second relay adhesive+and that the 28V voltage signal is switched to output terminal+DP through normally opened contact is last, has realized signal output.Control signal KK1 is through Darlington transistor array N1 rear drive relay line bag; First relay and the second relay normally open contact adhesive; Signal conduction is because 2 relays are parallel connection, as long as first relay or second relay have one to be that good signal is equally exported; Intact in order to ensure relay contact, a relay is taken out 1 group of contact CS1 and CS2.Be input to optocoupler as opening,, can accurately judge the quality of relay contact through reading the opening of optocoupler output into amount CSS1 and SS2 into amount.
Be connected to 1 group of normally closed contact of relay in the optocoupler, test as opening into amount, the characteristics of relay have determined two kinds of failure modes: a kind of is normally adhesive of relay, opens into value to be " 0 "; Another kind is that relay contact lost efficacy, and whether adhesive of relay is left into value and is always " 1 ".Be used for example with two relay parallel connections, opening into amount is CCS1 and open into amount CCS2, and corresponding relay is first relay and second relay, is that relay lost efficacy before can judging the relay adhesive accurately through table 1.Can judge after relay is inhaled it is that relay lost efficacy accurately through table 2.
Table 1
| Sequence number | CCS1 | CCS2 | The |
| 1 | 0 | 0 | Normally |
| 2 | 1 | 0 | |
| 3 | 0 | 1 | |
| 4 | 1 | 1 | First relay and second relay |
Table 2
| Sequence number | CCS1 | CCS2 | The |
| 1 | 0 | 0 | First relay and |
| 2 | 1 | 0 | |
| 3 | 0 | 1 | |
| 4 | 1 | 1 | Normally |
The above is merely the preferred implementation of the utility model, but the utility model protection domain is not limited thereto.Any those skilled in the art all can carry out suitable change or variation to it in the disclosed technical scope of the utility model, and this change or variation all should be encompassed within the protection domain of the utility model.
Claims (4)
1. the relay contact detection device is characterized in that, comprising: first double-contact relay, second double-contact relay, photoelectrical coupler and Darlington transistor array; Second output terminal of first double-contact relay is connected with photoelectrical coupler respectively with second output terminal of second double-contact relay; First power supply is connected the second normally opened contact ground connection of second normally opened contact of first double-contact relay and second double-contact relay with first normally opened contact of first double-contact relay and first normally opened contact of second double-contact relay; First output terminal of first double-contact relay is connected with the Darlington transistor array with first output terminal of second double-contact relay, and the Darlington transistor array also is connected with the relay line bag of first double-contact relay and the relay line bag of second double-contact relay respectively.
2. relay contact detection device as claimed in claim 1; It is characterized in that; The 1st pin and the 2nd pin of Darlington transistor array link together, and the output terminal of the output terminal of first double-contact relay and second double-contact relay all is connected with the 2nd pin with the 1st pin of Darlington transistor array; The 8th pin ground connection of Darlington transistor array; The 9th pin of Darlington transistor array connects first power supply; The 16th pin of Darlington transistor array connects first power supply through the relay line bag of first double-contact relay, and the 15th pin of Darlington transistor array connects first power supply through the relay line bag of second double-contact relay.
3. relay contact detection device as claimed in claim 2; It is characterized in that; Also comprise first diode and second diode, the 16th pin of Darlington transistor array connects the anode of first diode, and the negative electrode of first diode connects first power supply; The 15th pin of Darlington transistor array connects the anode of second diode, and the negative electrode of second diode connects first power supply.
4. like claim 1,2 or 3 described relay contact detection devices; It is characterized in that; Second output terminal of first double-contact relay is connected with the 2nd pin of photoelectrical coupler, and second output terminal of second double-contact relay is connected with the 4th pin of photoelectrical coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203625622U CN202275144U (en) | 2011-09-26 | 2011-09-26 | Relay contact detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203625622U CN202275144U (en) | 2011-09-26 | 2011-09-26 | Relay contact detection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202275144U true CN202275144U (en) | 2012-06-13 |
Family
ID=46195492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203625622U Expired - Lifetime CN202275144U (en) | 2011-09-26 | 2011-09-26 | Relay contact detection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202275144U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020415A (en) * | 2014-06-20 | 2014-09-03 | 珠海格力电器股份有限公司 | Relay detection device |
-
2011
- 2011-09-26 CN CN2011203625622U patent/CN202275144U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020415A (en) * | 2014-06-20 | 2014-09-03 | 珠海格力电器股份有限公司 | Relay detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HUBEI SANJIANG AEROSPACE HONGFENG CONTROL CO., LTD Free format text: FORMER NAME: STATE HONGFENG MACHINERY FACTORY |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 432000 Hubei city of Xiaogan province Beijing Road No. 8 gate Patentee after: Hubei Sanjiang Aerospace Hongfeng Control Co., Ltd. Address before: 432000 Hubei city of Xiaogan province Beijing Road No. 8 gate Patentee before: State Hongfeng Machinery Factory |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120613 |
|
| CX01 | Expiry of patent term |