Ultrasonic level sensor hardware circuit design

Abstract

Due to historical reasons and many unforeseen factors, urban water supply

and drainage system, especially the drainage system often lagged behind the urban

construction. Therefore, often the excavation has been the construction of good

buildings and facilities to transform the drainage system. Urban sewage to bring the

troubled， culvert sewage sewage treatment to clear the water supply and drainage

systems in big cities, people's living comfort is very important. Design and

development of the culvert drainage to clear the automatic control system of the

mobile robot to ensure the robot in box culvert in the freedom of sewage to clear ，

the culvert of sewage to clear the robot's design and development of core part. The

core portion of the control system is the development of the ultrasonic measuring

water level sensor.ultrasonic technology is relatively mature, has been widely

applied in many fields, ultrasonic level sensor for non-contact measuring instruments

for level measurement of chemical raw materials. the using of Ultrasonic wave is

more and more frequent. From the large scale flaw detection of the industrial system

to the measuring distance and clearing of the metal surface , the ultrasonic wave is

useful in our every daily life .

The ultrasonic distance measurer design with digital display functional module

used AT89C52 MCU as the core component, of which carries the characteristics

with low-cost, high-precision and microminiaturization. The whole circuit used

modular design, it includes the MCU control module, ultrasonic transmit module,

ultrasonic receive module and the Data display module.AT89S52, emission parts of

the circuit in case of power control, issued by the ultrasonic generator, ultrasonic,

ultrasonic propagation to the water surface reflection, echo ultrasonic receiver, after

the the AT89S52 treatment obtained the water level in thepart of the circuit from the

digital display after the next is the visual display. In the software design part, it

contains the main program, the presets subroutine, the launch subroutine, the

receiving subroutine and the display subroutine. Through the comprehensive

analysis processing of the AT89C51 MCU, The signal of each detector can realizing

the functions of ultrasonic measure. Based on these, designed the overall scheme of

the system. On the finally, through the hardware and software realize the whole