Development On Data Measurement And Control System Of The Water Hydraulic Multifunction Test Bench

The ocean, covering more than 70% of the Earth, is rich in biological, energy and mineral resources, which is the treasure trove of resources for the sustainable development of human society. Thus water hydraulic technology, with water as the working medium, has become a world frontier topic in the field of fluid transmission and control. It has a broad application prospect in the field of ocean. And for its green pollution-free, low cost, safety, etc., water hydraulic transmission technology is widely used in underwater operating machine, ships, submarines and other industrial fields. But whether the water hydraulic transmission can be normal, reliable and efficient operation or not, it largely depends on the performance of the selected water hydraulic components and system. Therefore, in water hydraulic transmission, it is necessary to carry out performance test of the water hydraulic components and system, so as to ensure the entire water hydraulic system can operate reliably and efficiently. In this paper, it is based on the water hydraulic multifunctional test bench and develop a set of data measurement and control system.Data measurement and control system of the water hydraulic multifunction test bench applies virtual instrument technology to establish a complete set of data measurement and control system. This system includes two important parts:data acquisition system and motor control system. Data acquisition system is mainly used to measure some physical performance parameters of water hydraulic components, such as flow, import/export pressure, speed and frequency, and so on. Motor control system can be used as an independent system that controls water hydraulic components to complete a specific movement, also can be done a specific performance test of water hydraulic components with the data acquisition system. The instrument panel built by LabWindows/CVI software platform makes the system operation simple, intuitive, and have a good man-machine interactive. Practical application shows that this system possesses the properties of reliability, stability, strong anti-interference and high efficiency, which can complete the performance test on water hydraulic components high speedily and precisely and can ensure the high precision of motor control. The system provides a reliable basis for optimal design and fault diagnosis of water hydraulic components. It has a high practical value in engineering application.This paper carry out deep research in the following several aspects:Firstly of all, this paper elaborates on the recent development of water hydraulic technology and its test system, summarizes the development trend of the water hydraulic test system, introduces the application of virtual instrument technology in water hydraulic testing system, and then propose the paper’s main research content and overall structure.Secondly, put forward to functional requirements which the researched data measurement and control system is needed to achieve, expound the overall structure of the system, and design the hardware scheme for the whole system. In terms of hardware, first, introduce the water hydraulic multifunction test bench, and then select sensors, data acquisition card and motor and design the signal conditioning circuit.Then, based on the hardware scheme, design the system’s software scheme. In the aspect of software, mainly introduce the characteristics and functions of LabWindows/CVI, deeply analyze the communication method between software LabWindows/CVI and data acquisition card, the principle of motor control and design and implementation of every test interface. Then carry out tests on direct-acting overflow valve, and analyze the test results.Finally, make a summary to the full article, and look forward to the next research work.