Ex_net team product introduction ----- overview of parking space guide system
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Http://blog.csdn.net/ex_net/article/details/7616345
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The parking space guide system is a fully automatic and Intelligent Parking guide system for parking lots. It is creative and has excellent performance. The system uses advanced ultrasonic detection technology to automatically control the parking space usage in the whole yard. The empty parking space information is displayed on the computer screen/electronic display screen in an accurate and timely manner. System networking
Overview(1) parking space sensors
(2) Concentrator
(3) central controller
(4) parking lights
(5) Management Computer (server, operating machine) parking space sensor detection principle according to the ultrasonic parking space detector from top down an ultrasonic wave, detection of vehicle roof and the reflection of the ground, this can correctly detect whether there are vehicles in each parking space, and then transmit the parking information of each parking space to the control computer through the network line, and the computer processes the information through software, transmit the guiding signal to the guiding indicator and parking indicator. The indicator lights are displayed in different colors according to different situations. If the indicator light shows red, a vehicle occupies the parking space. If the indicator light shows green, the driver is guided to quickly find the parking space. Internal Structure of parking space sensor products
Introduction to main chipsThe processor uses stc11f04e, which has the following features:
(1) powerful encryption, high speed, high reliability, and low power consumption
(2) Strong Antistatic and strong anti-interference
Cd4069 driver for ultrasonic emission
Cx20106 integrated circuit is used for ultrasonic reception, which is highly integrated and not prone to faults.
The network communication uses the maxcompute chip, which has short-circuit current limit and can be output to high-impedance status through the thermal shutdown circuit. Receiver Input has an invalid protection feature. When the input is open, the logic high level output can be ensured. It has high anti-interference performance.
Sensor PCB diagramThe PCB circuit board adopts double-layer wiring and fully considers the characteristics of super-wave and single-chip microcomputer circuits. The main control chip adopts stc11f04e, which has strong anti-interference ability.
Parking Space sensor performance parametersValid detection distance: 40 <x <2500
Transmission Distance:
(1) RS232 mode, farthest transmission <15 m
(2) RS485 mode, farthest transmission <1200 m
Power Consumption:
(1) standby status:
(2) working status:
Device operating voltage: 5 V
