How to locate the laser servo valve


In the field of modern industrial automation and precision control, servo valve, as a control element with high precision and high response, is widely used in hydraulic system. With the development of science and technology, the combination of laser technology and servo valve gave birth to a new control device, “laser servo valve”. Its positioning accuracy and response speed far exceed the traditional servo valve, and it is widely used in aerospace, robotics, precision machining and other fields.

First, the basic principle of laser servo valve

Laser servo valve is based on the traditional electro-hydraulic servo valve, and introduces laser sensing technology to realize high-precision feedback and control of valve position. Its core principle is to monitor the position of the spool in real time through the laser sensor, and feed back the position signal to the control system. The controller adjusts the servo motor or electromagnetic drive device according to the deviation between the set value and the actual value, so that the spool can be accurately positioned at the target position.

　　Laser sensor has the advantages of non-contact, high precision, fast response and strong anti-interference ability, which can realize micro-level or even nano-level position detectionand greatly improve the positioning accuracy and stability of servo valve.

Second, the positioning process of laser servo valve

The positioning process of laser servo valve mainly includes the following steps:

1. Target setting: The control system sets the target position of the valve core, which is usually determined according to the equipment operation requirements or process parameters.

2. Position detection: the laser sensor detects the actual position of the valve core in real time, and converts the signal into digital quantity and feeds it back to the controller.

3. Error calculation: The controller compares the target position with the actual position to calculate the deviation value.

4. Adjustment: Control signal is generated by PID control algorithm to drive servo mechanism (such as stepping motor, linear motor or electromagnetic actuator) to adjust the valve core position.

5. Closed-loop feedback: The system repeats the above process to form closed-loop control until the spool is stable at the target position.

Third, the advantages of laser servo valve

1. High-precision positioning: The laser measurement system can achieve sub-micron precision and significantly improve the control quality of the system.

2. Fast response: Compared with traditional mechanical or inductive feedback, laser feedback system has higher dynamic response capability.

3. Non-contact measurement: avoiding mechanical wear and improving the life and reliability of the system.

　　4. Stronganti-interference ability: the laser sensor isfree from electromagneticinterference and is suitable for complex electromagnetic environment.

5. Integrability: strong compatibility with digital control system, easy to realize intelligent and networked control.

Fourth, the application field

Laser servo valve is widely used in the following fields because of its high precision and stability:

-Aerospace: used in the hydraulic control system of aircraft to realize the precise control of rudder surface, landing gear and other components.

-Robotics: used for precise control of hydraulic drive systems of industrial robots and special robots.

-Precision manufacturing: for example, in CNC machine tools and semiconductor processing equipment, precise control of tool displacement is realized.

-Test equipment: used in materials testing machines, shaking tables and other instruments to ensure the accuracy of the loading process.

V. Development trend

　　With the development of intelligent manufacturing and Industry 4.0, the laser servo valve will further develop in the direction of intelligence, networking and miniaturization. In the future, combined with artificial intelligence algorithm and Internet of Things technology, laser servo valve can not only realize autonomous learning and predictive maintenance, but also improve the operation and maintenance efficiency of equipment through remote monitoring and diagnosis.

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As an important achievement in the field of high-precision hydraulic control, the improvement of laser servo valve’s positioning ability marks the progress of industrial control to a higher level. It not only meets the dual requirements of modern industry for precision and efficiency, but also provides solid technical support for the development of intelligent manufacturing. In the future, with the continuous development of related technologies, laser servo valves will play an irreplaceable role in more high-end fields.