CN203241767U - Self-checking circuit capable of preventing wire connection misoperation - Google Patents
Self-checking circuit capable of preventing wire connection misoperation Download PDFInfo
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- CN203241767U CN203241767U CN 201320164994 CN201320164994U CN203241767U CN 203241767 U CN203241767 U CN 203241767U CN 201320164994 CN201320164994 CN 201320164994 CN 201320164994 U CN201320164994 U CN 201320164994U CN 203241767 U CN203241767 U CN 203241767U
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Abstract
The utility model discloses a self-checking circuit capable of preventing wire connection misoperation. The self-checking circuit comprises an alternating-current power supply, an AC/DC (alternating-current/direct-current) converter, a sensor, a relay and a programmable control unit. The self-checking circuit is characterized by further comprising a detection switch K1 which is connected to the level input ends of the sensor and the programmable control unit. The self-checking circuit has the following advantages that: the correction of signal transfer is guaranteed, the use reliability of the self-checking circuit and the safety of equipment are improved, and the self-checking circuit is simple in structure, stable and reliable; electronic components are few in types and quantity, and convenient to realize; and the self-checking circuit is strong in universality, capable of being used on any type of sensors, and capable of stably and reliably running.
Description
(1) technical field:
The utility model belongs to the electrical control field, especially a kind of self-checking circuit of anti-wiring maloperation.
(2) background technology:
Along with the high speed development of Chinese industrial robotization, the improving constantly of sensor intelligent, each association area is also more and more for the use of sensor, and the safety problem that thereupon produces also more receives people's concern.
In present known technology, the use loop of sensor is generally (see figure 1): sensor directly and PLC, single-chip microcomputer, frequency converter, the control able to programme such as DSP unit connects, sensor is the signal that detects, be directly delivered in the control able to programme unit, and then by control able to programme unit signal is processed, thereby further opertaing device execution, use this link circuit, if generation misconnection, during the maloperations such as short circuit, sensor is in trigger mode all the time, and the actual signal that causes sensor to detect can not reach in the control able to programme unit, and safety return circuit is inoperative, there is great potential safety hazard, even jeopardizes personal security.
In sum, in view of many drawbacks of prior art, the safety return circuit of therefore inventing a kind of anti-wiring maloperation just seems necessary.
(3) utility model content:
The purpose of this utility model is to design a kind of self-checking circuit of anti-wiring maloperation, it can overcome the deficiencies in the prior art, is a kind of simple in structure, easy to operate, safety circuit and method that can effectively prevent the wiring maloperations such as the control able to programme such as PLC, single-chip microcomputer, frequency converter, DSP unit short circuit or misconnection.
The technical solution of the utility model: a kind of self-checking circuit of anti-wiring maloperation, comprise AC power, AC/DC transducer, sensor, relay and control able to programme unit, wherein, described AC/DC transducer converts the alternating current of AC power to direct current and is connected with control able to programme unit power end; The output terminal of described sensor connects the level input end of control able to programme unit; The output terminal of described control able to programme unit is connected to the COM port of control able to programme unit through relay; It is characterized in that it also comprises a detector switch K1, and be connected between sensor and the control able to programme unit level input end.
Described control able to programme unit is PLC, single-chip microcomputer, frequency converter or DSP.
Described sensor is industrial sensor, fluid sensor, index transducer, range sensor or photoelectric protection equipment.
Described relay is Omron MY-D2 series.
Described detector switch K1 is normally closed switch.
Described detector switch K1 is the normally closed switch that relay carries.
To be control able to programme unit power end input end with its level input end be short-circuited that wiring error or sensor level output terminal directly are connected with control able to programme unit power end input end and the false wiring that disconnects with control able to programme unit level input end in described wiring maloperation.
Described AC power is the 220V AC power.
After the described AC/DC transducer conversion, it is exported 0V and value dc voltage two-way is arranged, and it is 15V-30V that the value dc voltage is wherein arranged.
The course of work of the present utility model:
1. converting the alternating current of AC power to direct current by the AC/DC transducer is the power supply of control able to programme unit, the AC/DC transducer is output as 0V and value dc voltage two-way is arranged, and the control able to programme unit power supply 0V input end of sending into respectively is its power supply with value dc voltage input end is arranged;
2. after sensor is triggered, its output signal is input to and is low level in the control able to programme unit, open the normally closed switch K1 of relay this moment, if disappearing, the level signal of the level input end of control able to programme unit this circuit working then is described under normal circumstances, namely be open-circuit condition this moment, and circuit enters normal operation behind the normally closed switch K1 that again closes;
3. after opening the normally closed switch K1 of relay, still there is low level in the level signal of the level input end of control able to programme unit, then the wiring maloperation that is short-circuited of control able to programme unit power supply 0V input end and its level input end has occured in explanation, should check at once the circuit wiring;
4. after opening the normally closed switch K1 of relay, the level input end of control able to programme unit is without any level signal, whether the level input end that detects control able to programme unit behind the normally closed switch K1 that closes again has level signal, if still do not have, then explanation occured that sensor level output terminal directly is connected with control able to programme unit power end input end and with the false wiring of its level input end disconnection, should check at once the circuit wiring.
Superiority of the present utility model is: (1) can guarantee the correctness that sensor signal is transmitted, and improves the reliability of its use and the security of equipment, and guarantees operator safety; (2) simple in structure, reliable and stable; (3) electronic element kind and quantity are few, are convenient to realize; (4) highly versatile all can use on the sensor of which kind of class in office, and can reliable and stable operation.
(4) description of drawings:
Fig. 1 is the traditional wiring schematic diagram of sensor in the prior art;
Fig. 2 is the structural representation of the self-checking circuit of the related a kind of anti-wiring maloperation of the utility model;
Fig. 3 is that the self-checking circuit of the related a kind of anti-wiring maloperation of the utility model is when the structural representation of the wiring error that is short-circuited;
Fig. 4 is the self-checking circuit of the related a kind of anti-wiring maloperation of the utility model disconnects false wiring when generation structural representation.
3.1 be the level input end of control able to programme unit, 3.2 is the output terminal of control able to programme unit.
(5) embodiment:
Embodiment: a kind of self-checking circuit (see figure 2) of anti-wiring maloperation, comprise AC power, AC/DC transducer, sensor, relay and control able to programme unit, wherein, described AC/DC transducer converts the alternating current of AC power to direct current and is connected with control able to programme unit power end; The output terminal of described sensor connects the level input end 3.1 of control able to programme unit; The output terminal 3.2 of described control able to programme unit is connected to the COM port of control able to programme unit through relay; It is characterized in that it also comprises a detector switch K1, and be connected between sensor and the control able to programme unit level input end 3.1.
Described control able to programme unit is PLC.
Described sensor is industrial sensor.
Described relay is Omron MY-D2 series.
Described detector switch K1 is the normally closed switch (seeing Fig. 2, Fig. 3, Fig. 4) that relay carries.
To be control able to programme unit power end input end with its level input end 3.1 be short-circuited that wiring error (see figure 3) or sensor level output terminal directly are connected with control able to programme unit power end input end and the false wiring (see figure 4) that disconnects with control able to programme unit level input end 3.1 in described wiring maloperation.
Described AC power is 220V AC power (seeing Fig. 2, Fig. 3, Fig. 4).
After the described AC/DC transducer conversion, it is exported 0V and value dc voltage two-way is arranged, and wherein has the value dc voltage to be+24V.
The course of work of the present embodiment:
5. converting the alternating current of AC power to direct current by the AC/DC transducer is the power supply of control able to programme unit, the AC/DC transducer is output as 0V and value dc voltage two-way is arranged, and the control able to programme unit power supply 0V input end of sending into respectively is its power supply (see figure 2) with value dc voltage input end is arranged;
6. after sensor is triggered, its output signal is input to and is low level in the control able to programme unit, open the normally closed switch K1 of relay this moment, if disappearing, the level signal of the level input end 3.1 of control able to programme unit this circuit working then is described under normal circumstances, namely be open-circuit condition this moment, and circuit enters the normal operation (see figure 2) behind the normally closed switch K1 that again closes;
7. after opening the normally closed switch K1 of relay, still there is low level in the level signal of the level input end 3.1 of control able to programme unit, then the wiring maloperation that is short-circuited of control able to programme unit power supply 0V input end and its level input end 3.1 has occured in explanation, should check at once circuit wiring (see figure 3);
After opening the normally closed switch K1 of relay, the level input end 3.1 of control able to programme unit is without any level signal, whether the level input end 3.1 that detects control able to programme unit behind the normally closed switch K1 that closes again has level signal, if still do not have, then explanation occured that sensor level output terminal directly is connected with control able to programme unit power end input end and with the false wiring of its level input end 3.1 disconnections, should check at once circuit wiring (see figure 4).
Claims (9)
1. the self-checking circuit of an anti-wiring maloperation, comprise AC power, AC/DC transducer, sensor, relay and control able to programme unit, wherein, described AC/DC transducer converts the alternating current of AC power to direct current and is connected with control able to programme unit power end; The output terminal of described sensor connects the level input end of control able to programme unit; The output terminal of described control able to programme unit is connected to the COM port of control able to programme unit through relay; It is characterized in that it also comprises a detector switch K1, and be connected between sensor and the control able to programme unit level input end.
2. the self-checking circuit of described a kind of anti-wiring maloperation according to claim 1 is characterized in that described control able to programme unit is PLC, single-chip microcomputer, frequency converter or DSP.
3. the self-checking circuit of described a kind of anti-wiring maloperation according to claim 1 is characterized in that described sensor is industrial sensor, fluid sensor, index transducer, range sensor or photoelectric protection equipment.
4. the self-checking circuit of described a kind of anti-wiring maloperation according to claim 1 is characterized in that described relay is Omron MY-D2 series.
5. the self-checking circuit of described a kind of anti-wiring maloperation according to claim 1 is characterized in that described detector switch K1 is normally closed switch.
6. the self-checking circuit of described a kind of anti-wiring maloperation according to claim 5 is characterized in that described detector switch K1 is the normally closed switch that relay carries.
7. the self-checking circuit of described a kind of anti-wiring maloperation according to claim 1, the false wiring that it is characterized in that described wiring maloperation to be control able to programme unit power end input end with its level input end be short-circuited that wiring error or sensor level output terminal directly are connected with control able to programme unit power end input end and disconnect with control able to programme unit level input end.
8. the self-checking circuit of described a kind of anti-wiring maloperation according to claim 1 is characterized in that described AC power is the 220V AC power.
9. the self-checking circuit of described a kind of anti-wiring maloperation according to claim 1, it is characterized in that described AC/DC transducer conversion after, its output 0V and value dc voltage two-way is arranged, it is 15V-30V that the value dc voltage is wherein arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320164994 CN203241767U (en) | 2013-04-03 | 2013-04-03 | Self-checking circuit capable of preventing wire connection misoperation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320164994 CN203241767U (en) | 2013-04-03 | 2013-04-03 | Self-checking circuit capable of preventing wire connection misoperation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203241767U true CN203241767U (en) | 2013-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320164994 Expired - Fee Related CN203241767U (en) | 2013-04-03 | 2013-04-03 | Self-checking circuit capable of preventing wire connection misoperation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203241767U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197591A (en) * | 2013-04-03 | 2013-07-10 | 天津长荣印刷设备股份有限公司 | Self-checking circuit of preventing misoperation of wiring and working method thereof |
-
2013
- 2013-04-03 CN CN 201320164994 patent/CN203241767U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197591A (en) * | 2013-04-03 | 2013-07-10 | 天津长荣印刷设备股份有限公司 | Self-checking circuit of preventing misoperation of wiring and working method thereof |
| CN103197591B (en) * | 2013-04-03 | 2015-08-19 | 天津长荣印刷设备股份有限公司 | A kind of self-checking circuit of anti-wiring maloperation and method of work thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20160403 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |