Electromagnetic lock blocking anti-fraud structureTechnical field
The present invention relates to a kind of electromagnetic lock blocking anti-fraud structure.
Background technology
Electromagnetic lock is widely used in all kinds of gate control systems, it is a kind of electromechanical interlocking device, generally comprise electric control system and mechanical executable portion, electric control system is as shown in Figure 1, electric control system typically has locking indicator lamp H, power switch S, magnetic induction locking contact KA and electromagnet coil L, power switch S, magnetic induction locking contact KA and electromagnet coil L are sequentially connected in series in being parallel to electromagnet coil L two ends after both ends of power, locking indicator lamp H series resistors R；Mechanical executable portion typically has shell, locking bolt, back-moving spring, electromagnet mechanism.Electromagnet coil obtains electric after power knob and magnetic induction locking contact, and electromagnet mechanism driving locking bolt, which is acted, causes door locking, while sending door block signal to background control system.Magnetic induction locking contact in such electromagnetic lock is usually the magnetic bead and magnetic induction switch being respectively arranged on door and doorframe, when door is located at closed position, magnetic bead is corresponding with magnetic induction switch position, so that magnetic induction locking contact, action of locking a door is performed by electromagnet coil.
But, there is also certain defect for above-mentioned electromagnetic lock, that is the blocking of door is easily spoofed, when door is located at non-closed positions, it need to only take other magnetic bead close to magnetic induction switch, be also turned on power switch, electromagnet coil equally it is electric, so that electromagnetic lock performs block action and sends door block signal to background control system, but now door is practically in non-blocked state, i.e. blocking and is spoofed.Because magnetic induction switch can not differentiate the true identity of magnetic bead, cause blocking to be spoofed, cause electromagnetic lock to be applied to there is larger leak in safety-protection system.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of electromagnetic lock blocking anti-fraud structure, and this structure overcomes traditional cheated defect of electromagnetic lock blocking, it is ensured that blocking is correct, has prevented the leak of safety-protection system, it is ensured that the security of gate inhibition.
To solve above-mentioned technical problem, electromagnetic lock blocking anti-fraud structure of the present invention includes doorframe, door body, locking indicator lamp, current-limiting resistance, power switch, magnetic induction locking contact and electromagnet coil, the locking indicator lamp is parallel to the electromagnet coil two ends after being concatenated with current-limiting resistance, this structure also includes RFID card reader, RFID tag and controlling switch, the RFID card reader is located at the doorframe, the RFID tag is located at the door body, the RFID card reader is corresponding with the set location of RFID tag, the electromagnet coil, power switch, magnetic induction locking contact and controlling switch connect both ends of power after being sequentially connected in series, the RFID card reader, which is received, causes the controlling switch closure after FRID label information.
Further, the RFID tag is provided with unique and not modifiable IDNumber, described No. ID is corresponding with electromagnetic lock sequence number, and the RFID card reader only recognizes unique No. ID corresponding with electromagnetic lock sequence number.
Further, the magnetic induction locking contact includes magnetic bead and magnetic induction switch, and the magnetic bead is located at the door body, and the magnetic induction switch is located at the doorframe, the magnetic bead is corresponding with the set location of magnetic induction switch, and the magnetic induction switch is sensed and closed after the magnetic bead.
Further, the magnetic induction switch is hall sensor.
Further, the RFID card reader reads the RFID tag legal No. ID and sends blocking signal when the hall sensor senses the presence of magnetic bead.
Because electromagnetic lock blocking anti-fraud structure of the present invention employs above-mentioned technical proposal, i.e. this structure includes doorframe, door body, locking indicator lamp, resistance, power switch, magnetic induction locking contact, electromagnet coil, RFID tag and controlling switch, locking indicator lamp is parallel to electromagnet coil two ends after being concatenated with resistance, RFID card reader is located at doorframe, RFID tag is located at door body, RFID card reader is corresponding with the set location of RFID tag, electromagnet coil, power switch, magnetic induction locking contact and controlling switch connect both ends of power after being sequentially connected in series, RFID card reader, which is received, causes the controlling switch closure after FRID label information.This structure overcomes traditional cheated defect of electromagnetic lock blocking, it is ensured that blocking is correct, has prevented the leak of safety-protection system, it is ensured that the security of gate inhibition.
Brief description of the drawings
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
Fig. 1 is the electric control system circuit diagram of traditional electromagnetic lock；
Fig. 2 is RFID card reader and RFID tag setting schematic diagram in this structure；
Fig. 3 is electric control system circuit diagram in this structure.
Embodiment
Embodiment is as shown in Figures 2 and 3, electromagnetic lock blocking anti-fraud structure of the present invention includes doorframe 1, door body 2, locking indicator lamp H, current-limiting resistance R, power switch S, magnetic induction locking contact KA and electromagnet coil L, the locking indicator lamp H is parallel to the electromagnet coil L two ends after being concatenated with current-limiting resistance R, this structure also includes RFID card reader 11, RFID tag 21 and controlling switch KB, the RFID card reader 11 is located at the doorframe 1, the RFID tag 21 is located at the door body 2, the RFID card reader 11 is corresponding with the set location of RFID tag 21, the electromagnet coil L, power switch S, magnetic induction locking contact KA and controlling switch KB connect both ends of power after being sequentially connected in series, the RFID card reader 11, which is received, causes the controlling switch KB closures after the information of RFID tag 21.
It is preferred that, the RFID tag 21 is provided with unique and not modifiable No. ID, and described No. ID is corresponding with electromagnetic lock sequence number, and the RFID card reader 11 only recognizes unique No. ID corresponding with electromagnetic lock sequence number.
It is preferred that, the magnetic induction locking contact KA includes magnetic bead 22 and magnetic induction switch 12, the magnetic bead 22 is located at the door body 2, the magnetic induction switch 12 is located at the doorframe 1, the magnetic bead 22 is corresponding with the set location of magnetic induction switch 12, and the magnetic induction switch 12 is sensed and closed after the magnetic bead 22.
It is preferred that, the magnetic induction switch 12 is hall sensor.
It is preferred that, the RFID card reader 11 reads the RFID tag 21 legal No. ID and sends blocking signal when the hall sensor senses the presence of magnetic bead 22.
This structure by setting RFID card reader and RFID tag respectively in the correspondence position of doorframe and door body, then controlling switch is concatenated in the electrical control division parallel circuit of electromagnetic lock, the controlling switch is controlled to close by RFID card reader, when door body is located at closed position, RFID card reader receives FRID label information so that controlling switch is closed, magnetic induction switch senses magnetic bead simultaneously, so that magnetic induction locking junction closure, now electromagnet coil obtains electric, so that door lock is closed, locking indicator lamp is lighted, and send door block signal to background control system, the block signal reflects the time of day that door lock is closed, blocking is avoided to be spoofed, the leak of the safety-protection system using electromagnetic lock is prevented, it ensure that the security of gate inhibition.
This structure can not perform locking action using other magnetic bead close to magnetic induction switch, locking action only can be just performed after magnetic induction switch senses magnetic signal and RFID card reader receives legal RFID tag ID, block signal is sent, so as to overcome the defect of traditional electromagnetic lock；RFID tag includes unique ID number corresponding with electromagnetic lock sequence number simultaneously, even if using other RFID tag close to RFID card reader, RFID card reader will not also be misread and produce error signal, so as to ensure the correctness of block action.