CN103942906A - Early warning protection system for safe high voltage equipment - Google Patents
Early warning protection system for safe high voltage equipment Download PDFInfo
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- CN103942906A CN103942906A CN201410190121.7A CN201410190121A CN103942906A CN 103942906 A CN103942906 A CN 103942906A CN 201410190121 A CN201410190121 A CN 201410190121A CN 103942906 A CN103942906 A CN 103942906A
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- door lock
- protection system
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Abstract
The invention discloses an early warning protection system for safe high voltage equipment. The early warning protection system comprises a protective fence and a monitoring circuit, wherein the protective fence provided with an isolating door and a door lock is arranged around the high voltage equipment; the monitoring circuit comprises a background computer, a single-chip computer, an RFID (Radio Frequency Identification Devices) reader, a pyroelectric human body infrared sensor, a door lock control circuit and an alarm, wherein the RFID reader is connected with the single-chip computer through an SPI (Single Program Initiation) interface, the output end of the pyroelectric human body infrared sensor is connected with the input port of the single-chip computer, the door lock control circuit and the alarm are connected the different output ports of the single-chip computer, and the single-chip computer is connected with the background computer. According to the protection system, an RFID and an infrared detection technology are organically combined together, so that persons who get close to the high voltage equipment can be discovered in time, and the identities of incomers can be automatically identified, and the persons who have no rights can be shut out; furthermore, the protection system can automatically alarm once abnormal phenomenon is generated, so that the safety of the high voltage equipment can be guaranteed.
Description
Technical field
The present invention relates to a kind of high-tension apparatus guard system that RFID is combined with infrared early warning, belong to power transformation or distribution technique field.
Background technology
Existing high-tension apparatus, generally adopts guard rail, separation net etc. to protect such as transformer station, electric substation, and staff holds key and is allowed for access.The shortcoming that this guard system exists is there is no prior-warning device, inoperative personnel also can hold key and enter, or directly cross guard rail and enter, and high-tension apparatus is easy to suffer lawless person's destruction like this, also cannot guarantee incomer's personal safety, have major safety risks simultaneously.Although minority high-tension apparatus has been set up prior-warning device, the Chinese patent that for example application number is 201020289235.4 discloses a kind of monitoring and guard system of high-voltage transmission equipment, but its prior-warning device can not be distinguished incomer's identity, cannot stop the inoperative personnel that hold key to enter, can not thoroughly eliminate safe hidden trouble.Adopt advanced identity recognizing technology, for example recognition of face, although fingerprint recognition etc. can address the above problem, because equipment price is expensive, is not suitable for huge electric system.
Summary of the invention
The object of the invention is to the drawback for prior art, a kind of safe high-tension apparatus early warning protection system is provided, effectively to prevent that inoperative personnel from entering, guarantee the safety of high-tension apparatus.
Problem of the present invention realizes with following technical proposals:
A kind of safe high-tension apparatus early warning protection system, formation comprises and is arranged on the high-tension apparatus roll guard with isolating door and door lock and supervisory circuit around, described supervisory circuit comprises background computer, single-chip microcomputer, RFID reader, pyroelectric human body infrared sensor, door lock control circuit and alarm, described RFID reader is connected with single-chip microcomputer by SPI interface, the output terminal of described pyroelectric human body infrared sensor connects the input port of single-chip microcomputer, described door lock control circuit and alarm connect the different output ports of single-chip microcomputer, single-chip microcomputer is connected with background computer by serial ports, described supervisory circuit operates in the following manner:
A. single-chip microcomputer carries out Real-Time Monitoring by pyroelectric human body infrared sensor around to high-tension apparatus, when finding that there is people near roll guard, to alarm output alarm control signal, make alarm send alarm signal, start RFID reader simultaneously, detect and whether have RFID electronic tag to streak the induction zone of RFID reader; (alarm delay voltage; Alerting signal extend in time or personnel more approach fence, utilize infrared induction to the higher principle of temperature control sound and become rapid; Meanwhile, after postponing certain hour, to background computer, transmit and have people illegally to approach delay warning).
B. when having RFID electronic tag to streak the induction zone of RFID reader, single-chip microcomputer is read the information of this RFID electronic tag and this information is passed to background computer by RFID reader;
C. background computer receives after this information, and it is compared with pre-stored staff's log-on message, judges whether RFID electronic tag possessor is registered staff, and sends judged result to single-chip microcomputer;
D. single-chip microcomputer obtains after the judged result of background computer, if find, RFID electronic tag possessor is registered staff, to door lock control circuit output unlocking signal, open the isolating door of roll guard, and stop to alarm output alarm control signal, otherwise, to alarm output alarm control signal, and have the illegal trial of people to open door lock in background computer warning.
Above-mentioned safe high-tension apparatus early warning protection system, for fear of false alarm, a time switch is set in single-chip microcomputer, when single-chip microcomputer has detected people near roll guard by pyroelectric human body infrared sensor, start immediately time switch, the alarm control signal of single-chip microcomputer output is delivered to the input end of alarm through the normally opened contact of time switch.
Above-mentioned safe high-tension apparatus early warning protection system, described door lock comprises lock housing and is arranged on the electromagnet in lock housing, the dead bolt of described electromagnet is through the through hole in lock housing corresponding with the lockhole on doorframe.
Above-mentioned safe high-tension apparatus early warning protection system, base chip, resistance, electric capacity, field effect transistor and door lock contactor when described door lock control circuit comprises NE555, during described NE555, base chip and resistance and electric capacity are connected into monostalbe trigger, the input end of this monostalbe trigger connects the unlocking signal output terminal of single-chip microcomputer, the grid of output termination field effect transistor, the control coil of described field effect transistor control gate latch contact, the normally opened contact of described door lock contactor is controlled the electromagnet of door lock.
The present invention organically combines RFID and infra-red detection technology, can not only find in time to approach the personnel of high-tension apparatus, and can automatically identify incomer's identity, to not have authority person keeps outside of the door, once occur that abnormal occurrence is automatic alarm, thereby guaranteed the safety of high-tension apparatus.In addition, native system also has the advantages such as simple in structure, with low cost.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is electrical schematic diagram of the present invention;
Fig. 2 is structural representation of the present invention;
Fig. 3 is the structural representation of door lock.
Fig. 4 is workflow diagram of the present invention.
In figure, each list of reference numerals is: 1, high-tension apparatus, 2, infra-red alarm, 3, isolating door, 4, roll guard, 5, door lock, 6, electromagnet, 7, dead bolt (electromagnet core), 8, doorframe, 9, lock housing, U1, single-chip microcomputer, U2, RFID reader, base chip when U3, NE555, BJ, alarm, CMPT, background computer, J, door lock contactor, H, pyroelectric human body infrared sensor, T, time switch, R, resistance, C, electric capacity, Q, field effect transistor.
Embodiment
Details are as follows for system formation of the present invention:
At high-tension apparatus 1, four meters of opening beyond 4, four meters of roll guards is set around, belongs to public distance zone, with interior, only permitted staff and enter for four meters.One fan isolating door 3 is set on fence, loads onto RFID reader U2, for identifying each staff electronic tag with it.Each electronic tag (can make IC-card etc.) has unique numbering, to distinguish everyone identity, also can be used as the key that enters high-tension apparatus district.
RFID has unique coding, and China's second generation identity card contains RFID chip, that is to say, China's second generation identity card is equivalent to an electronic tag.Second generation identity card electronic tag frequency of operation is 13.56MHZ, can adopt the true and false of card reader identity verification card, and by card reader of ID card, in I.D. chip, the stored information such as name, address and photo show one by one.
In addition, in roll guard 4, load onto the infra-red alarm 2 being formed by pyroelectric human body infrared sensor H, alarm BJ etc., infra-red alarm is to responsive to temperature, the infrared ray that the object radiation that temperature is higher goes out is stronger, in sensing environment, exist while exceeding the radiation of background intensity, with regard to trigger alarm.Whether the infrared induction that infra-red alarm emits by monitoring human has people, automatic alarm when having people illegally to enter.
RFID reader is arranged on isolating door limit, and apart from 1.5 meters, ground left and right distance, the energising of infrared alarming main frame is placed on fixed position, alarm probe is hung over to approximately 2 meters of high places, it is tilted to front lower place, and to obtain higher sensitivity, background computer is arranged on the pulpit on side nearby.
The course of work of system of the present invention is: each staff configures RFID electronic tag, coded message by wireless mode by RFID reader reading electronic labels, and by RS232 or RS485, pass to background computer and show, when having card to enter and Card Reader is successful, flash lights once, loudspeaker sounding, background computer judges that whether RFID electronic tag corresponding informance is effective simultaneously, whether there is authority to enter, if allow, enter, door-lock opening, realizes the identification of RFID reader to staff with this.As for infrared alarming part, when stranger is during near roll guard around of high-tension apparatus, by human body constantly to extraradial infrared ray, sensed that people is close, when people arrives behind hazardous location, single-chip microcomputer starts prior-warning device, demonstrates the information such as close time of stranger, concrete orientation simultaneously on background computer.In order distinguishing, illegally to enter and normal staff, to avoid false alarm, can utilize the time switch T in single-chip microcomputer postpone warning and remove infrared alarming after RFID successfully reads.Specific works process is: when having people near high-tension apparatus district, single-chip microcomputer produces alerting signal, time switch T starts timing, now alerting signal can't output to alarm at once, if the personnel of trigger alarm also do not leave after 15 seconds, does not also swipe the card successfully, time switch T sends signal, alarm starts to report to the police, and along with the increase of time of fire alarming, warning volume constantly increases.If the personnel of trigger alarm or swipe the card successfully within 15 seconds, precaution alarm is removed.When operating personnel swipes the card successfully, while entering the operation of high-tension apparatus district, certain operation duration is shut or arranged to isolating door automatically, and guard system automatically resets, and restarts warning.
RFID reader is by the information of contactless mode reading electronic labels, and information exchange is crossed serial peripheral equipment interface SPI and passed to single-chip microcomputer, and single-chip microcomputer is crossed RS232 by the information exchange reading and passed to background computer.RFID reader is high frequency reader, operates mainly in 13.56MHz, and inner main chip is RC500.The bridge that RC500 chip is communicated by letter with radio-frequency (RF) tag as single-chip microcomputer, meets ISO/IEC 14443 international standards.What RFID interface circuit adopted is SPI interface communication mode, and the SPI interface line P1.1, P1.2, P1.3, the P1.4 that by MISO, MOSI, SCK, several interface lines of SDA, provide with single chip computer AT 89S51 are connected; Concrete structure is as Fig. 1.
Electronic tag is made card-like, mates with the draw-in groove size on RFID reader, requires folding, waterproof in material, guarantees that position is in the scope reliably reading during insertion, and RFID reader encapsulating material requirement waterproof is moisture resistance, good airproof performance.
the door lock of isolating door can adopt electromagnetic lock, as long as very little electric current electromagnetic lock will produce very large magnetic force, isolating door is pinned.After operating personnel swipes the card successfully, electromagnetic lock is power-off, and electromagnetic lock loses suction and can open the door.In order to prevent the fortuitous events such as power failure, also can open door lock with manual key simultaneously, enter high-tension apparatus district.
The principle of work of electromagnetic lock is as follows:
When door lock is closed, dead bolt stretches out lock housing and inserts in the lockhole on doorframe under the effect of back-moving spring.After the success of RFID reader Card Reader, in magnet coil, there is electric current process, dead bolt is sucked out lockhole, and lock has just been opened.Now pull isolating door handle, isolating door is opened.
Door lock control circuit adopt by NE555 time the base chip monostalbe trigger that forms, 2 pin (low triggering end TR) of the pulse of single-chip microcomputer generation base chip during by NE555 enter; 6 pin are threshold value input; 1 pin is ground connection; 3 pin are output terminal, by field effect transistor control gate latch contact; 4 pin are direct clear terminal, are connected with 8 pin power ends (12V); 5 pin are for controlling voltage end, external 5V voltage.
While there is no trigger pip, during NE555,2 pin of base chip are high level, and output terminal is low level steady state (SS), and the contact of door lock contactor disconnects, and electromagnetic lock is not worked; If 2 pin apply trigger pip, 3 pin states become high level by low level, the closing of contact of door lock contactor, door-lock opening, simultaneously capacitor charging.When capacitor charging is during to setting value, 3 pin voltages become low level from high level, and the contact of door lock contactor disconnects, and door lock is closed, capacitor discharge simultaneously, and circuit returns to steady state (SS).
Claims (4)
1. the high-tension apparatus early warning protection system of a safety, it is characterized in that, it comprises and is arranged on high-tension apparatus (1) roll guard (4) and supervisory circuit with isolating door (3) and door lock (5) around, and described supervisory circuit comprises background computer (CMPT), single-chip microcomputer (U1), RFID reader (U2), pyroelectric human body infrared sensor (H), door lock control circuit and alarm (BJ); Described RFID reader (U2) is connected with single-chip microcomputer (U1) by SPI interface, the output terminal of described pyroelectric human body infrared sensor (H) connects the input port of single-chip microcomputer (U1), described door lock control circuit and alarm (BJ) connect the different output ports of single-chip microcomputer (U1), single-chip microcomputer (U1) is connected with background computer (CMPT) by serial ports, and described supervisory circuit operates in the following manner:
A. single-chip microcomputer (U1) carries out Real-Time Monitoring by pyroelectric human body infrared sensor (H) around to high-tension apparatus, when finding that there is people near roll guard (4), to alarm (BJ) output alarm control signal, make alarm (BJ) send alarm signal, start RFID reader (U2) simultaneously, detect and whether have RFID electronic tag to streak the induction zone of RFID reader (U2);
B. when having RFID electronic tag to streak the induction zone of RFID reader (U2), single-chip microcomputer (U1) is read the information of this RFID electronic tag and this information is passed to background computer (CMPT) by RFID reader (U2);
C. background computer (CMPT) receives after this information, and it is compared with pre-stored staff's log-on message, judges whether RFID electronic tag possessor is registered staff, and sends judged result to single-chip microcomputer (U1);
D. single-chip microcomputer (U1) obtains after the judged result of background computer (CMPT), if find, RFID electronic tag possessor is registered staff, to door lock control circuit output unlocking signal, open the isolating door (3) of roll guard (4), and stop to alarm (BJ) output alarm control signal, otherwise, to alarm output alarm control signal, and have the illegal trial of people to open door lock in background computer warning.
2. safe high-tension apparatus early warning protection system according to claim 1, it is characterized in that, for fear of false alarm, a time switch (T) is set in single-chip microcomputer (U1), when single-chip microcomputer (U1) has detected people near roll guard (4) by pyroelectric human body infrared sensor (H), start immediately time switch (T), the alarm control signal of single-chip microcomputer (U1) output is delivered to the input end of alarm (BJ) through the normally opened contact of time switch (T).
3. safe high-tension apparatus early warning protection system according to claim 1 and 2, it is characterized in that, described door lock (5) comprises lock housing (9) and is arranged on the electromagnet (6) in lock housing (9), and the dead bolt (7) of described electromagnet (6) is through the through hole in lock housing (9) corresponding with the lockhole on doorframe (8).
4. safe high-tension apparatus early warning protection system according to claim 3, it is characterized in that, base chip (U3) when described door lock control circuit comprises NE555, resistance (R), electric capacity (C), field effect transistor (Q) and door lock contactor (J), during described NE555, base chip (U3) is connected into monostalbe trigger with resistance (R) and electric capacity (C), the input end of this monostalbe trigger connects the unlocking signal output terminal of single-chip microcomputer (U1), the grid of output termination field effect transistor (Q), the control coil of described field effect transistor (Q) control gate latch contact (J), the normally opened contact of described door lock contactor (J) is controlled the electromagnet (6) of door lock (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410190121.7A CN103942906B (en) | 2014-05-07 | 2014-05-07 | A kind of safe high pressure equipment early warning protection system |
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| CN201410190121.7A CN103942906B (en) | 2014-05-07 | 2014-05-07 | A kind of safe high pressure equipment early warning protection system |
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| CN103942906A true CN103942906A (en) | 2014-07-23 |
| CN103942906B CN103942906B (en) | 2016-06-15 |
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| CN104361705A (en) * | 2014-11-29 | 2015-02-18 | 国家电网公司 | Power distribution room safety monitoring system based on infrared sensing |
| CN104483934A (en) * | 2014-11-29 | 2015-04-01 | 国家电网公司 | Power site foreign personnel management and control system |
| CN105235167A (en) * | 2015-11-06 | 2016-01-13 | 宁波海太工贸有限公司 | Injection molding machine safety system and control method thereof |
| CN105427558A (en) * | 2015-10-30 | 2016-03-23 | 桂林信通科技有限公司 | Security control system and security control method |
| CN105488933A (en) * | 2015-12-03 | 2016-04-13 | 国网江西省电力公司抚州供电分公司 | Security fence alarm |
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| CN111564012A (en) * | 2020-07-15 | 2020-08-21 | 国网山东省电力公司潍坊市寒亭区供电公司 | Distribution box intrusion detection system and method |
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| CN103942906B (en) | 2016-06-15 |
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