电子锁（Electronic lock）.docVIP

电子锁（Electronic lock） Pyroelectric remote sense red circuit remote alarm circuit design, its principle and circuit diagram, 5 Design topic: Design of pyroelectric remote sense alarm circuit for wireless remote control I. design requirements FM emission frequency 88 ~ 108MHz, 1000Hz sound alarm. Two, design tasks 1. familiar with relevant information. 2. control circuit design, circuit diagram: 2 drawings 1; circuit schematic diagram: 2 drawings 2. 3. write the design manual, about 10000 words: (1) design idea and scheme demonstration; (2) the working principle of the system; With regard to the structure, principle and operation method of pyroelectric sensors, the principle and shape and field of view of the pinched ears lens, please refer to the relevant data. (3) circuit calculation; (4) calculation and selection of circuit components; (5) list of parts and components. Let me answer Screenshot anonymous Answer (2) Dragon electronic network, level 0312, 2009-03-19 Wireless human pyroelectric infrared sensor in electronic security, human body detector in the field of application of the passive pyroelectric infrared detector is very extensive, and by the majority of users and professionals welcome because of its low price, stable performance. The working principle and characteristics of passive pyroelectric infrared probe: constant temperature body, generally around 37 degrees, so it will send a specific wavelength of 10UM infrared, passive infrared sensor detecting human body is by the launch of about 10UM infrared and to carry out the work. The infrared light emitted by the human body around 10UM is enhanced to accumulate on the infrared sensing source. Infrared source usually adopts pyroelectric element, the element to the human body infrared radiation temperature changes in the receiving will lose the charge balance, release charge, following circuit detection can generate alarm signal processing. 1) this probe is designed to detect human radiation. Therefore, pyro