I. Project Background

In a large-scale water conservancy hub project, a series of gates shoulder the important responsibilities of regulating water levels, controlling water flow, ensuring flood prevention safety, and meeting the water demands for irrigation and power generation. Due to the wide coverage of this water conservancy hub, some of the gates are located in remote areas and are scattered, posing a great challenge to their efficient and precise monitoring. The traditional monitoring and control methods of the gates rely on manual on-site inspections and operations, which not only consume a large amount of manpower and material resources but also fail to obtain the gate status information in real time, making it difficult to respond quickly to sudden changes in water levels or emergencies. Therefore, the introduction of advanced automated monitoring and control systems is extremely urgent.

II. System Composition

1. Intelligent Displacement Digital Display Control Instrument:

As the core hub of the entire system, this intelligent displacement digital display control instrument has powerful functions and high compatibility. It can seamlessly interface with various types of displacement sensors. In this case, it works in coordination with the wire rope displacement sensor. The instrument is equipped with a high-definition display screen, which can intuitively and real-time display the opening height value of the gate, making it convenient for on-site workers to check at any time. Meanwhile, its internal integrated precision signal processing circuit and communication module can accurately convert and process the displacement signals collected by the sensor, and output a standard analog signal for transmission to the back-end equipment in the control center.

2. Wire Rope Displacement Sensor:

It is installed on the lifting mechanism of the gate. One end of it is connected to the gate, and the other end is fixed on a stable support. When the gate is opened or closed, the wire rope will stretch and retract with the movement of the gate. The sensor accurately calculates the displacement change of the gate, that is, the opening or closing height, by detecting the stretching and retracting length of the wire rope. The wire rope displacement sensor has the advantages of high measurement accuracy, good stability, and a wide measurement range, and can adapt to the complex working environment in water conservancy projects, providing accurate and reliable original displacement data for the intelligent displacement digital display control instrument.

III. Workflow

1. Data Collection and Display:

During daily operation, the wire rope displacement sensor continuously monitors the position change of the gate. Once the position of the gate changes, the sensor immediately converts the mechanical displacement generated by the stretching and retracting of the wire rope into an electrical signal and quickly transmits it to the intelligent displacement digital display control instrument. After receiving the signal, the instrument rapidly analyzes and processes it, accurately converts the electrical signal into the corresponding opening height value of the gate through the internal algorithm, and clearly displays it in real time on the display screen. On-site operators can intuitively understand the current opening status of the gate without complex operations, just by glancing at the display, which provides great convenience for on-site operation management. 2. Signal Transmission and Remote Monitoring:

At the same time, the intelligent displacement digital display control instrument outputs the processed displacement data in the form of a standard analog signal (such as a 4-20mA current signal). This signal is transmitted to the back-end equipment in the control center, such as the monitoring computer or Programmable Logic Controller (PLC), through a dedicated cable. In the control center, monitoring personnel can view the opening height information of all gates in real time through professional monitoring software and display it in an intuitive graphical interface. Once it is found that the opening height of a certain gate is abnormal or does not conform to the predetermined dispatching scheme, the monitoring personnel can immediately take corresponding measures.

3. Remote Control:

The back-end equipment in the control center can not only achieve remote real-time monitoring of the gate but also has the function of remotely controlling the opening and closing of the gate. When it is necessary to adjust the gate opening according to the water conservancy dispatching requirements, the monitoring personnel input the corresponding control instructions on the monitoring software in the control center, and these instructions are transmitted to the intelligent displacement digital display control instrument through the communication network. After receiving the instructions, the instrument, through internal logical judgment and processing, outputs the corresponding control signal to the driving motor controller of the gate, thus achieving the remote and precise control of the opening or closing operation of the gate. The entire remote control process is rapid in response, accurate, and reliable, greatly improving the operation and management efficiency of the water conservancy hub.

IV. Application Effects

1. Improvement of Monitoring Accuracy and Real-time Performance:

Through the coordinated use of the intelligent displacement digital display control instrument and the wire rope displacement sensor, high-precision monitoring of the gate opening height has been achieved. The measurement accuracy can reach the millimeter level, which has been greatly improved compared with the traditional manual measurement method. At the same time, the real-time display and remote real-time monitoring functions enable the staff to keep abreast of the latest status of the gate at any time and promptly discover potential problems, providing a strong guarantee for the safe operation of the water conservancy hub. 2. Enhancement of Work Efficiency and Automation Level:

The realization of the remote control function enables the staff to operate the gate without being on-site, greatly saving manpower and time costs. In the face of sudden floods or other emergencies, it can respond quickly and adjust the gate opening in a timely manner, effectively improving the ability of the water conservancy hub to deal with emergencies. In addition, the automated monitoring and control process reduces the interference of human factors, improves the stability and reliability of the entire system, and makes the operation and management of the water conservancy hub more efficient and scientific.

3. Optimization of Water Conservancy Dispatching Management:

The control center can obtain accurate information of all gates in real time, which is convenient for scientific and reasonable water conservancy dispatching according to the actual situations such as water levels and flow rates. Through remote monitoring and control, the coordinated operation of each gate has been realized, the allocation and utilization of water resources have been optimized, and the comprehensive benefits of the water conservancy hub have been improved.

V. Summary and Outlook

The successful application of the intelligent displacement digital display control instrument in the water conservancy gate system in this case fully demonstrates its great advantages in the field of industrial automation monitoring and control. Through the coordinated work with the wire rope displacement sensor, the remote real-time monitoring and precise control of the water conservancy gate have been realized, providing reliable technical support for the safe and efficient operation of the water conservancy hub. With the continuous progress of science and technology, the intelligent displacement digital display control instrument will be continuously upgraded and improved, its functions will be more abundant, and its compatibility will be stronger. It is expected to be widely applied in more fields, injecting new vitality into the automation development of various industries.