CN103942906B - A kind of safe high pressure equipment early warning protection system - Google Patents
A kind of safe high pressure equipment early warning protection system Download PDFInfo
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- CN103942906B CN103942906B CN201410190121.7A CN201410190121A CN103942906B CN 103942906 B CN103942906 B CN 103942906B CN 201410190121 A CN201410190121 A CN 201410190121A CN 103942906 B CN103942906 B CN 103942906B
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Abstract
A kind of multiple functional high pressure equipment 1 guard system, it includes the roll guard with isolating door and door lock and the supervisory circuit that are arranged on around high pressure equipment, described supervisory circuit includes background computer, single-chip microcomputer, RFID reader, pyroelectric human body infrared sensor, door lock control circuits and alarm, described RFID reader is connected with single-chip microcomputer by SPI interface, the outfan of described pyroelectric human body infrared sensor connects the input port of single-chip microcomputer, described door lock control circuits and alarm connect the different output ports of single-chip microcomputer, single-chip microcomputer is connected with background computer by serial ports. RFID is organically combined by the present invention with infra-red detection technology, the personnel close to high pressure equipment can not only be found in time, and can automatically identify the identity of incomer, authority person will not be had keep outside of the door, once abnormal phenomena and automatic alarm occur, thus ensure that the safety of high pressure equipment.
Description
Technical field
The present invention relates to a kind of high pressure equipment guard system combined with infrared early warning by RFID, belong to power transformation or distribution technique field.
Background technology
Existing high pressure equipment, for instance transformer station, electric substation are generally adopted guard rail, separation net etc. and protect, and staff holds key and is allowed for access. This guard system has the drawback that do not have prior-warning device, non-working person can also hold key and enter, or directly crosses guard rail entrance, and such high pressure equipment is easy to suffer the destruction of lawless person, also cannot ensure the personal safety of incomer simultaneously, there are major safety risks. Although minority high pressure equipment is additionally arranged prior-warning device, such as application number be 201020289235.4 Chinese patent disclose monitoring and the guard system of a kind of high-voltage transmission equipment, but its prior-warning device can not distinguish the identity of incomer, the non-working person holding key cannot be stoped to enter, it is impossible to thoroughly eliminate safe hidden trouble. Adopt advanced identity recognizing technology, for instance recognition of face, although fingerprint recognition etc. can solve the problems referred to above, but owing to equipment price is expensive, be not suitable for huge power system.
Summary of the invention
Present invention aims to the drawback of prior art, it is provided that a kind of safe high pressure equipment early warning protection system, effectively to prevent non-working person from entering, it is ensured that the safety of high pressure equipment.
Problem of the present invention realizes with following technical proposals:
A kind of safe high pressure equipment early warning protection system, composition includes the roll guard with isolating door and door lock and the supervisory circuit that are arranged on around high pressure equipment, described supervisory circuit includes background computer, single-chip microcomputer, RFID reader, pyroelectric human body infrared sensor, door lock control circuits and alarm, described RFID reader is connected with single-chip microcomputer by SPI interface, the outfan of described pyroelectric human body infrared sensor connects the input port of single-chip microcomputer, described door lock control circuits 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 is monitored around high pressure equipment in real time by pyroelectric human body infrared sensor, when finding to have people near roll guard, then export alarm control signal to alarm, alarm is made to send alarm signal, start RFID reader simultaneously, detect whether that RFID streaks the induction zone of RFID reader;(alarm delay voltage; Alarm signal extend in time or personnel closer to fence, utilize infrared induction to the higher principle of temperature control sound and become rapid; Meanwhile, after postponing certain time, has people illegally close to being detained warning to background computer transmission).
B., when the induction zone having RFID to streak RFID reader, single-chip microcomputer reads the information of this RFID by RFID reader and this information is passed to background computer;
C. after background computer receives this information, by it compared with the staff's log-on message prestored, it is judged that whether RFID holder is registered staff, and will determine that result sends single-chip microcomputer to;
D. after single-chip microcomputer obtains the judged result of background computer, if finding, RFID holder is registered staff, then export unlocking signal to door lock control circuits, open the isolating door of roll guard, and stop exporting alarm control signal to alarm, otherwise, export alarm control signal to alarm, and have people illegally to attempt opening door lock in background computer warning.
Above-mentioned safe high pressure equipment early warning protection system, in order to avoid false alarm, one time switch is set in single-chip microcomputer, start time switch immediately when single-chip microcomputer has detected people near roll guard by pyroelectric human body infrared sensor, the normally opened contact of the timed switch of alarm control signal of single-chip microcomputer output delivers to the input of alarm.
Above-mentioned safe high pressure equipment early warning protection system, described door lock includes lock housing and the electric magnet being arranged in lock housing, and the dead bolt of described electric magnet passes the through hole in lock housing and corresponding with the lockhole on doorframe.
Above-mentioned safe high pressure equipment early warning protection system, described door lock control circuits includes base chip during NE555, resistance, electric capacity, field effect transistor and door lock catalyst, during described NE555, base chip is connected into monostable flipflop with resistance and electric capacity, the input of this monostable flipflop connects the unlocking signal outfan of single-chip microcomputer, the grid of output termination field effect transistor, described field effect transistor controls the control coil of door lock catalyst, and the normally opened contact of described door lock catalyst controls the electric magnet of door lock.
RFID is organically combined by the present invention with infra-red detection technology, the personnel close to high pressure equipment can not only be found in time, and can automatically identify the identity of incomer, authority person will not be had keep outside of the door, once abnormal phenomena and automatic alarm occur, thus ensure that the safety of high pressure equipment. Additionally, native system also has simple in construction, the advantage such as with low cost.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is the electrical schematic diagram of the present invention;
Fig. 2 is the structural representation of the present invention;
Fig. 3 is the structural representation of door lock.
Fig. 4 is the workflow diagram of the present invention.
In figure, each list of reference numerals is: 1, high pressure equipment, 2, infra-red alarm, 3, isolating door, 4, roll guard, 5, door lock, 6, electric magnet, 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 catalyst, H, pyroelectric human body infrared sensor, T, time switch, R, resistance, C, electric capacity, Q, field effect transistor.
Detailed description of the invention
Details are as follows for the system composition of the present invention:
Around high pressure equipment 1, four meters of arrange roll guard 4, and beyond four meters, opening, belongs to public distance zone, then only permitted staff and enter within four meters.Fence arranges a fan isolating door 3, loads onto RFID reader U2, for identifying the electronic tag with each staff. Each electronic tag (can make IC-card etc.) unique numbering, to distinguish everyone identity, it is possible to as the key entering high pressure equipment district.
RFID has unique coding, and China's second generation identity card is contained within RFID chip, say, that China's second generation identity card is equivalent to an electronic tag. Second generation identity card electronic tag operating frequency is 13.56MHZ, it is possible to adopt the true and false of card reader checking identity card, and by card reader of ID card, the information such as name stored in identity card chip, address and photo shows one by one.
In addition, the infra-red alarm 2 being made up of pyroelectric human body infrared sensor H, alarm BJ etc. is loaded onto in roll guard 4, infra-red alarm is temperature sensitive, the infrared ray that the object radiation that temperature is more high goes out is more strong, when sensing that in environment, existence exceeds the radiation of background intensity, just trigger warning. Infra-red alarm passes through to monitor whether human-body emitting infrared induction out has people, the automatic alarm when there being people illegally to enter.
RFID reader is arranged on isolating door limit, about 1.5 meters of ground of distance distance, and the energising of infrared alarming main frame is placed on fixed position, alarm probe is hung over about 2 meters of high places, making its forward downward tilt, to obtain higher sensitivity, background computer is arranged on the control room on side nearby.
The work process of present system is: each staff configures RFID, wirelessly allow the coding information of RFID reader reading electronic labels, and pass to background computer by RS232 or RS485 and show, when there being card to enter also Card Reader success, flash lights is once, speaker sounding, background computer judges that whether RFID corresponding informance is effective simultaneously, whether have permission entrance, if allowing access into, door-lock opening, realizes the RFID reader identification to staff with this. As for infrared alarming part, when stranger's roll guard around high pressure equipment, by detecting human body constantly to extraradial infrared ray, sense that people is close, after people arrives deathtrap, single-chip microcomputer starts prior-warning device, demonstrates the information such as stranger's close time, concrete orientation on background computer simultaneously. In order to distinguish illegal entrance and normal operation personnel, it is to avoid false alarm, it is possible to use the time switch T in single-chip microcomputer postpones and reports to the police and release infrared alarming after RFID successfully reads. Specific works process is: when there being people near high pressure equipment district, single-chip microcomputer produces alarm signal, time switch T starts timing, now alarm signal can't export alarm at once, if triggering the personnel reported to the police after 15 seconds but without leaving, also without swiping the card successfully, then 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 triggering the personnel reported to the police within 15 seconds or swiping the card successfully, precaution alarm releases. When operating personnel swipes the card successfully, when entering the operation of high pressure equipment district, isolating door is automatically shut or arranges certain operation time, and guard system automatically resets, and restarts warning.
RFID reader is by the information of contactless mode reading electronic labels, and information passes to single-chip microcomputer by serial peripheral equipment interface SPI, and the information read is passed to background computer by RS232 by single-chip microcomputer.RFID reader is high frequency reader, operates mainly in 13.56MHz, and internal main chip is RC500. The bridge that RC500 chip communicates with radio-frequency (RF) tag as single-chip microcomputer, meets ISO/IEC14443 international standard. What RFID interface adopted is SPI interface communication modes, and SPI interface line P1.1, P1.2, P1.3, P1.4 of being provided with chip processor AT89S51 by MISO, MOSI, SCK, SDA several interface line are connected; Concrete structure is Fig. 1 such as.
Electronic tag is made card-like, mates with the draw-in groove size in RFID reader, material requires folding, waterproof, ensures that position is in the reliable scope read 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 only small current electromagnetic lock will produce very big magnetic force, is pinned by isolating door. Operating personnel swipes the card electromagnetic lock and power-off after successfully, and electromagnetic lock loses suction and can open the door. Simultaneously in order to prevent the fortuitous events such as power failure, it is also possible to open door lock with manual key, enter high pressure equipment district.
The operation principle of electromagnetic lock is as follows:
When door lock is closed, dead bolt stretch out under the effect of back-moving spring lock housing and insert on doorframe lockhole in. When after the success of RFID reader Card Reader, having electric current process in electromagnet coil, dead bolt is sucked out lockhole, and lock turns on. Now pulling isolating door handle, isolating door is opened.
Door lock control circuits adopt by NE555 time the monostable flipflop that form of base chip, 2 feet (low triggering end TR) entrance of base chip when the pulse that single-chip microcomputer produces is by NE555; 6 feet are threshold value input; 1 foot is ground connection; 3 feet are outfan, control door lock catalyst by field effect transistor; 4 feet are direct clear terminal, are connected with 8 foot power ends (12V); 5 feet are for controlling voltage end, external 5V voltage.
When not triggering signal, during NE555,2 feet of base chip are high level, and outfan is low level steady statue, and the contact of door lock catalyst disconnects, and electromagnetic lock does not work; If 2 feet apply to trigger signal, 3 feet states are become high level, the closing of contact of door lock catalyst, door-lock opening, simultaneously electric capacity charging by low level. When electric capacity charges to setting value, 3 foot voltages are become low level from high level, and the contact of door lock catalyst disconnects, and door lock is closed, simultaneously electric capacity electric discharge, and circuit returns steady statue.
Claims (4)
1. the high pressure equipment early warning protection system of a safety, it is characterized in that, it includes being arranged on the roll guard (4) with isolating door (3) and door lock (5) around high pressure equipment (1) and supervisory circuit, and described supervisory circuit includes background computer (CMPT), single-chip microcomputer (U1), RFID reader (U2), pyroelectric human body infrared sensor (H), door lock control circuits and alarm (BJ); Described RFID reader (U2) is connected with single-chip microcomputer (U1) by SPI interface, the outfan of described pyroelectric human body infrared sensor (H) connects the input port of single-chip microcomputer (U1), described door lock control circuits 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) is monitored around high pressure equipment in real time by pyroelectric human body infrared sensor (H), when find have people near roll guard (4) time, then export alarm control signal to alarm (BJ), alarm (BJ) is made to send alarm signal, start RFID reader (U2) simultaneously, detect whether that RFID streaks the induction zone of RFID reader (U2);
B., when the induction zone having RFID to streak RFID reader (U2), single-chip microcomputer (U1) reads the information of this RFID by RFID reader (U2) and this information is passed to background computer (CMPT);
C. after background computer (CMPT) receives this information, by it compared with the staff's log-on message prestored, it is judged that whether RFID holder is registered staff, and will determine that result sends single-chip microcomputer (U1) to;
D. after single-chip microcomputer (U1) obtains the judged result of background computer (CMPT), if finding, RFID holder is registered staff, then export unlocking signal to door lock control circuits, open the isolating door (3) of roll guard (4), and stop exporting alarm control signal to alarm (BJ), otherwise, export alarm control signal to alarm, and have people illegally to attempt opening door lock in background computer warning.
2. safe high pressure equipment early warning protection system according to claim 1, it is characterized in that, in order to avoid false alarm, one time switch (T) is set in single-chip microcomputer (U1), when single-chip microcomputer (U1) by pyroelectric human body infrared sensor (H) detected people near roll guard (4) time start time switch (T) immediately, the normally opened contact of the timed switch of the alarm control signal (T) that single-chip microcomputer (U1) exports delivers to the input of alarm (BJ).
3. safe high pressure equipment early warning protection system according to claim 1 and 2, it is characterized in that, described door lock (5) includes lock housing (9) and the electric magnet (6) being arranged in lock housing (9), and the dead bolt (7) of described electric magnet (6) passes the through hole in lock housing (9) and corresponding with the lockhole on doorframe (8).
4. safe high pressure equipment early warning protection system according to claim 3, it is characterized in that, described door lock control circuits includes base chip (U3) during NE555, resistance (R), electric capacity (C), field effect transistor (Q) and door lock catalyst (J), during described NE555, base chip (U3) connects into monostable flipflop with resistance (R) and electric capacity (C), the input of this monostable flipflop connects the unlocking signal outfan of single-chip microcomputer (U1), the grid of output termination field effect transistor (Q), described field effect transistor (Q) controls the control coil of door lock catalyst (J), the normally opened contact of described door lock catalyst (J) controls the electric magnet (6) of door lock (5).
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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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| 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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| CN103942906B true CN103942906B (en) | 2016-06-15 |
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Families Citing this family (8)
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| CN104269007A (en) * | 2014-10-17 | 2015-01-07 | 国家电网公司 | Electronic signboard for electric power tower |
| CN104483934A (en) * | 2014-11-29 | 2015-04-01 | 国家电网公司 | Power site foreign personnel management and control system |
| CN104361705A (en) * | 2014-11-29 | 2015-02-18 | 国家电网公司 | Power distribution room safety monitoring system based on infrared sensing |
| 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 |
| 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 |
| 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 |
| CN107341940A (en) * | 2017-06-30 | 2017-11-10 | 深圳前海弘稼科技有限公司 | A kind of safety monitoring system and monitoring method |
| 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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