| Aiming at the actuality that automation technology is exactly need in aquiculture industry of our country, a kind of multi-function,multi-parameter water survey instrument is designed in this dissertation to fit the needs of our country's aquiculture industry. This system is composed of many single-chip microcomputers used as fishponds controlling computers and two industrial control computer, one is used as remote monitoring computer and the other as field monitoring computer. It takes RF2000 to communicate between fishponds monitoring computer and field monitoring computer and takes Modem to communicate data between remote monitoring computer and field monitoring computer. Once the system fault happens and the fish occur pathological changes and unwell, the system can give an alarm in time to monitor the fish in the fishponds.Due to the situation of our country that we have dropped far behind developed countries in this filed, developing a kind of multi-function,multi-parameter water survey instrument has grand significance of theory and practice. In the first chapter, the paper introduces the developing situation of the aquiculture at home and abroad and the objective and significance that the paper focuses on. In the second chapter, we introduce the design of hardware and software of the multi-function,multi-parameter water survey instrument, and non-electric signals to be measured are collected respectively by temperature sensor, PH electrode, dissolved oxygen sensor, conductivity sensor. There is expatiation on the principle of these four sensors in this part, and emphasize on the signal modulation circuit. In the third chapter, we introduce the way of data transmission of the water survey instrument, and emphasizes on the communication ways between the field monitoring computer and fishponds controlling computers. At the same time, we also introduce the communication ways between the field monitoring computer and remote monitoring computer. In the forth chapter, we introduce the software design of the water survey instrument and the field monitoring computer. The software system has integrated function and it satisfy practical require. In the fifth chapter, we introduce the practical application of the water survey instrument.The experiment on the spot can prove the fact that the system runs safety and stably, the precision of the data measured is accordant to aquiculture industry. |
