Intelligent hydrological monitoring system module

The measurement of hydrological data such as water level, water temperature, and flow velocity has always been the focus of the hydropower station department. At present, most of the functions of domestic hydrological collection systems are mainly data collection and transmission, and few have the function of automatically controlling water conservancy equipment based on on-site water conditions. The designed intelligent hydrological monitoring system can allow the hydrological manager to set the upper and lower limits of the water level through the main control computer to realize automatic control of the operation of water conservancy equipment; it can also set the upper and lower limits directly on site by pressing buttons when a network failure occurs; at present, similar domestic models There are few products that have the function of self-checking the intelligent monitoring system. This system can check the intelligent monitoring systems at different locations at any time through the simulated water level signal set by the host computer software to determine whether the data error is too large to ensure the safety and reliability of the data.

Data acquisition front-end AD circuit module

Usually, hydrological information is collected using various sensors developed by different companies. The output of some sensors is directly a switching value or a digital signal, but the output of many types of sensors is an analog voltage or analog current signal that reflects the measured non-electricity. The analog voltage or current signal output by this type of sensor needs to be converted into a corresponding digital signal before it can be processed by the microcontroller. Therefore, this system has designed a functional module for analog-to-digital conversion. The A/D converter used in this module is the 10-bit analog conversion serial device TLC1549 produced by TI Company. TLC1549 is sent to the microcontroller in serial mode. The three control pins of TLC1549 are connected to the three general-purpose I of P1 port of the microcontroller: P1.7 (digital signal output), P1.6 (clock), and P1.5 (chip select). /O is connected to form a serial interface, and the internal program of the microcontroller generates a clock to control the data transmission between the microcontroller and TLC1549. The interface circuit between the microcontroller and TLC1549 is shown in the figure: