Intelligent lock working principle analysis and intelligent lock basic principle of workflow technology is introduced

Working principle of the intelligent lock is what? Intelligent lock technology principle is what? For professionals, it is not difficult to understand the working principle of intelligent locks, each technology has a huge mass of data query, but for ordinary users to understand intelligent lock, know about the principle of more conducive to understand the industry, understand the use and maintenance of intelligent lock. Here introduce the working principle and hardware of intelligent lock. Intelligent combination lock system composed of intelligent monitor and electronic locks. The two different place, intelligent monitor electronic locks the required power supply and receive its send alarm information and status information. Here used line multiplexing technology, make the electricity supply and information transmission Shared a 2 core cable, improve the security and reliability of the system. The working principle of the intelligent lock science 1. The basic principle of intelligent monitor intelligent monitor it by single-chip computer, clock, keyboard, LCD display, memory, modem, line multiplexing and monitoring, A/D conversion, buzzer and other units. Mainly complete with electronic locks, intelligent analysis and communication lines of communication between the safety monitoring, and other functions. Intelligent monitor remain the state of receiving, receiving electronic locks in the fixed format of alarm information and status information. For the alarm message, immediately through the LCD display and buzzer sound and light alarm; To state information is stored in memory, and with the electronic locks before this moment in the history of the state, it is concluded that changes in trend, predict the future change of state, through the LCD monitor provide relevant information to the personnel on duty, for the use of decision. Intelligent monitor of establishing A correspondence with electronic locks at the same time, through the A/D converter in real-time monitoring of power supply current communication lines, change, effectively prevent the damage caused by man-made factors, to ensure the communication lines open. 2. Basic principle of electronic locks electronic locks it is also the 51 series microcontroller ( AT89051) As the core, with the corresponding hardware circuit, to complete the password Settings, storage, identification and display, drive the electromagnetic actuator and detect the drive current value, receive the alarming signal from the sensor to send, send data, etc. MCU receives the type in the code, and comparing with the password storage block in EEPROM, if the password is correct, the electromagnetic actuator driven lock; If the password is not correct, allows operators to enter the password, can enter up to three times. If the three are not correct, the single chip microcomputer through telecommunication lines road intelligent monitor alarm. Single-chip microcomputer will unlock operation and each time the electromagnetic actuator drive current value as a status information sent to the intelligent monitor, at the same time will receive from sensor alarm information is sent to the intelligent monitor interface, as the basis of intelligent analysis. Intelligent lock technology principle of detailed analysis in order to improve the safety and reliability of intelligent combination lock, in this paper, in addition to take measures on component selection ( Based on low power consumption, wide temperature range of devices) Outside, in the design of some key technology is adopted. 2. 1 line multiplexing technology intelligent monitor and electronic locks long distance place. If the communication circuit and power supply circuit separate way, some will inevitably increase the cable, the increase of potential safety concerns. This article adopted line multiplexing technology, only with a 2 core cable, implements the power supply and information transmission. In the sending end, electronic locks by pulse transformer T will be sent after a good data signal booster; At the receiving end, T will the received data signal pulse transformer step-down after send demodulator, to reduce the carrier signal loss in the transmission process. In order to reduce the mutual interference between communication and power supply, choice of choke, coupling capacitance C L to comprehensive consideration. Set fo = 400 KHZ carrier frequency, in order to ensure that the vast majority of signal energy transmitted to the receiving end, take the L = 33. 7μh ? C1 = 0。 047μF。 2. 2 current monitoring technology in order to prevent communication line of man-made destruction and electromagnetic actuators for some reason cause excessive current flows through the electromagnetic coil and burning coil, this paper adopts the current monitoring technology in the intelligent combination lock design. 2. 3 data communication and the pretreatment technology of intelligent monitor receiving locks from the state information ( Including the lock open, close, the first password, the second password is wrong, wrong password for the third time, etc. ) , flows through the electromagnetic actuator coil current value, and read The Times communications lines of power supply current value, combination form a block of data, the operating status of 1 byte, power supply current of 2 bytes, coil current of 2 bytes. Intelligent monitor in the process of communicate with electronic locks, always in a state of receiving. In order to improve the communication reliability, this paper adopt the way of repeating in the communication protocol, electronic locks send 5 times for each set of data repeat, intelligent monitor after received this set of data, USES the law of decoding error correction of large number, ensures the accuracy of the data reception. In addition to save memory to received data by adopting the technology of pretreatment, namely each receives a data, will first compare the data and setting of threshold method, if is greater than the threshold, emit transfinite alarm; If less than the threshold, the data with the received similar data comparison, with strong reserves. The storage of data for the maximum of every day.
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