基于单片机的门禁系统的设计
基于单片机门禁系统的设计
学号:B11040926
姓名:宁志杰
日期:2014.12.31
Colorimetric tube 1 0 mL glass. 4, the analysis step preparation of
the sample solution: precision weighing approximately 0.01 g~1.0 g
sample (accurate to 0.0001 g) in 1 ... V2--determination of sampling
volume. Unit ml (mI. ); M--quality of the sample, expressed in grams (g);
The atomic weight of 55.84--Fe; 2--conversion factors. 6, precision
under repeatability conditions to obtain the absolute value of the
difference of two independent test results shall not exceed the
arithmetical average of the 10%. Food additives sweet agent [saccharin
sodium, and sweet pigment, and acetyl sulfa acid potassium (Ann game
honey], and coloring agent of test according to focus introduced anti-
oxidant of detection (BHA, and BHT, and PG, and TBHQ),] GB2760
GB/T5009.30, and GB/T5009.32, and GB/T5009.35, and food in the often
using of anti-oxidant main has BHA, and BHT, and PG, and TBHQ tert-butyl
hydroxy fennel ether (BHA) 2,6-II tert-butyl on cresol (BHT ) Of tert-
butyl hydroxy anisole (BHA) 2,6-di-tert-butyl-p-cresol (BHT) testing in
accordance with GB/T5009.30 vapor phase chromatography and thin-layer
chromatography, this section focuses on Colorimetry. Principle 1,
obtained by steam distillation of the sample. separate the BHT, methanol
absorption, o-anisidine and sodium nitrite solution orange-red,
extracted with chloroform, compared with standard sizing. 2, anhydrous
calcium chloride reagent. Methanol. Chloroform. Methanol (50%). Sodium
nitrite solution (3 g/l): keep in dark place. O-anisidine solution;
weighing 125 mg o-anisidine in 50mL the second Brown volumetric flask,
add 25mL methanol and shake to dissolve, and 50mg activated carbon,
shake
基于单片机的门禁系统的设计
摘 要
门禁系统采用89C52 单片机作为控制核心，外围加蜂鸣器控制电路、开门指示
灯电路、电控锁控制电路以及LCD液晶显示电路等。门禁系统主要由CPU、工作指
示电路、振荡电路、蜂鸣器电路、门控锁电路、矩阵键盘、读卡模块、显示模块等
组成。该门禁系统采用射频卡完成刷卡进门，按刷卡出门等功能。其工作原理为:
当刷卡时，蜂鸣器响一下，如卡权限获得允许，显示模块显示卡号，同时继电器动
作将门锁打开，指示灯点亮，延时一段时间后继电器再次动作将门锁锁闭，指示灯
熄灭。当按下出门按钮时，继电器动作将门锁打开，指示灯点亮，延时一段时间后
继电器再次动作将门锁锁闭，指示灯熄灭。当输入初始密码时，若输入正确，继电
器动作将门锁打开，指示灯点亮，延时一段时间后继电器再次动作将门锁锁闭。此
外，程序中还增加了射频卡权限判断的功能，当遇到合法卡时显示卡号，门锁打
开，延时10s自动关闭，当遇到非法卡时不显示卡号门锁不开。本系统设计简单、
性能优良，具有一定的实用性。
关键词:门禁，射频卡，电控锁，液晶显示，单片机控制
Colorimetric tube 1 0 mL glass. 4, the analysis step preparation of
the sample solution: precision weighing approximately 0.01 g~1.0 g
sample (accurate to 0.0001 g) in 1 ... V2--determination of sampling
volume. Unit ml (mI. ); M--quality of the sample, expressed in grams (g);
The atomic weight of 55.84--Fe; 2--conversion factors. 6, precision
under repeatability conditions to obtain the absolute value of the
difference of two independent test results shall not exceed the
arithmetical average of the 10%. Food additives sweet agent [saccharin
sodium, and sweet pigment, and acetyl sulfa acid potassium (Ann game
honey], and coloring agent of test according to focus introduced anti-
oxidant of detection (BHA, and BHT, and PG, and TBHQ),] GB2760
GB/T5009.30, and GB/T5009.32, and GB/T5009.35, and food in the often
using of anti-oxidant main has BHA, and BHT, and PG, and TBHQ tert-butyl
hydroxy fennel ether (BHA) 2,6-II tert-butyl on cresol (BHT ) Of tert-
butyl hydroxy anisole (BHA) 2,6-di-tert-butyl-p-cresol (BHT) testing in
accordance with GB/T5009.30 vapor phase chromatography and thin-layer
chromatography, this section focuses on Colorimetry. Principle 1,
obtained by steam distillation of the sample. separate the BHT, methanol
absorption, o-anisidine and sodium nitrite solution orange-red,
extracted with chloroform, compared with standard sizing. 2, anhydrous
calcium chloride reagent. Methanol. Chloroform. Methanol (50%). Sodium
nitrite solution (3 g/l): keep in dark place. O-anisidine solution;
weighing 125 mg o-anisidine in 50mL the second Brown volumetric flask,
add 25mL methanol and shake to dissolve, and 50mg activated carbon,
shake
洛阳理工学院毕业设计(论
文)
Access Control System Design
ABSTRACT
Entrance guard system uses 89C52 single chip microcomputer as
control core and periphery add a buzzer control circuit, open the door
indicator light circuit, control circuit and control lock LCD display
circuit, etc. Entrance guard system mainly by the CPU and reset circuit,
the power indicative circuit, work instructions circuit, oscillating
circuit, a buzzer circuit, door control circuit, go out and lock button
reading card module, display module. The entrance guard system uses rf
card complete charge take the door, according to credit to go out, and
other functions. Its working principle is: when credit, a buzzer rang,
such as card to be allowed to access, display module display card number,
and at the same time relay action will open the door lock, indicator
light, delay after period of time relay action will again only door lock,
lights go out. When the press out button, the relay action will open the
door lock, indicator light, delay after period of time relay action will
again only door lock, lights go out. When the input password, if you
input the correct, relay action will open the door lock, indicator light,
delay after period of time relay action will lock door lock again. In
addition, the program will also increase the rf card authority judgment
function, when facing legal card showed the card number, door open,
delay 10 s automatically shut off, when meeting the illegal CARDS don't
