Figure 5

6 Conclusion

The test method of the long stroke cylinder proposed in this paper successfully replaces the traditional absolute displacement measurement and has remarkable features:

(1) Replacing the large-range sensor with a small-range sensor is practical, simple and feasible. It solves the technical problems encountered when purchasing and installing a large-range sensor for a cylinder with a particularly long stroke (such as more than 2 meters);

(2) The economic benefits are obvious. The small-range sensor is one-tenth or less of the cost of the large-scale sensor. With the grating sensor as the detection component, the relative error is used to directly and synchronously reflect the synchronization performance, and the saving can be saved. A grating sensor. It has strong adaptability and can also be used for synchronous operation test of multiple long stroke cylinders;

(3) The magnetic structure can conveniently realize the installation and adjustment of the sensor, and when the system is faulty, it can protect the sensor;

(4) The computer detection system has the advantages of fast and perfect processing functions, and provides an effective tool for error testing research and online synchronization performance online monitoring.

At present, the test research on long-stroke multi-cylinder is still a basic blank state. This research has universality and practicability, and has broad application prospects.

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