Remote automatic control system for water delivery channel
An automatic control and remote technology, applied in the direction of electrical program control, comprehensive factory control, comprehensive factory control, etc., can solve the problems of adding cables and unacceptable economic costs, and achieve the effect of simplifying the structure, reducing costs, and controlling smoothly and accurately
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Embodiment 1
[0021] This embodiment is a remote automatic control system for water delivery channels, such as figure 1 shown. This embodiment includes: a long-distance self-manifold water delivery open channel 1, the open channel is provided with a plurality of gates 4 at all levels that divide the open channel into multiple sections, a water diversion port 2 is provided near the upstream of the gates at all levels, and the respective gates of the gates at all levels are opened and closed The mechanism 8 is connected to the respective control units 7 of each gate, and the control units of each gate are connected through an open channel data transmission network 9 .
[0022] The long-distance self-manifold open water delivery channel described in this embodiment is a water supply open channel that uses gravity to make water flow naturally from a high water level to a low water level, and the water flow is not subject to other pressures except gravity. Nullahs are divided into sections by m...
Embodiment 2
[0028] This embodiment is an improvement of the first embodiment, and it is the refinement of the open channel data communication network in the first embodiment, such as image 3 shown. The open channel data communication network described in this embodiment includes: 3-5 control units are respectively connected with a router to form a star-connected subnet, and the described subnet is connected to the main network of the bus network; the described main The network is connected with at least one industrial control computer as the centralized data acquisition and control center.
[0029] Since the channel control is a series of serial nodes, it can be considered to directly connect the two upstream and downstream nodes of two adjacent subnets, such as figure 2 The connection of the dotted line realizes the direct exchange of acquisition parameter data.
[0030] The router in this embodiment can also be replaced by a splitter or a switch, but the function is poor. Due to th...
Embodiment 3
[0032] This embodiment is a remote automatic control method for water delivery channels using the system described in the above embodiments, and the process is as follows Figure 4 As shown, the steps of the method described in this embodiment are as follows:
[0033] Measurement steps: Water level sensors, flow sensors, and opening sensors used for gates at all levels convert the physical quantities reflecting the water level, flow, and opening of the gates at this level into standard electrical signals of 4 to 20 mA. The signals output by water level sensors, flow sensors, and opening sensors are usually continuous analog signals that need to be processed before they can be collected as digital signals. However, some advanced sensors currently output digital signals directly, so that the next step can be saved.
[0034] Steps of filtering and converting: converting the standard electrical signal into a digital signal by an A / D converter after filtering. The role of filteri...
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