• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A hydraulic cylinder test bed measurement and control system comprises console, electrical control cabinet, measurement and control cabinet, three test beds and main oil source components. Test data is acquired, analyzed and processed, a predetermined measurement and control program is automatically selected and started in automatic test mode according to test items selected by a user, instruction signals are sent to an analog output card and a PLC according to a predetermined action sequence, and output to actuating elements eg. proportional overflow valves, proportional reversing valves, solenoid valves and contactors, realizing real-time control and acquisition of test data eg. pressure, flow and displacement, full-automatic flow monitoring and control of performance test processes e.g. frequency response and step response of hydraulic cylinders, real-time data acquisition with high speed and precision, efficient and accurate real-time issuance of control commands, ensuring timeliness, accuracy, high efficiency and safety of the test measurements and control.
    公开号:NL2025654A
    申请号:NL2025654
    申请日:2020-05-22
    公开日:2020-12-03
    发明作者:Guo Junmei
    申请人:Univ Qilu Technology；
    IPC主号:
    专利说明:

    HYDRAULIC CYLINDER TEST BED MEASUREMENT AND CONTROL
    SYSTEM Field of the Invention The present invention relates to the technical field of hydraulic cylinder test bed measurement and control, in particular to a hydraulic cylinder test bed measurement and control system. Background of the Invention A hydraulic cylinder is a hydraulic actuating element that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). The hydraulic cylinder is simple in structure and reliable in operation. When the hydraulic cylinder is used to realize reciprocating motion, a deceleration device can be omitted, no transmission gap occurs, and the motion is stable, so the hydraulic cylinder has been widely used in hydraulic systems of various machines. In the delivery, upgrade optimization, maintenance and manufacturing of hydraulic cylinders, relevant performances of the hydraulic cylinders are required to be tested, in order to better improve the technical performance and quality of products and enhance the market competitiveness of the products.
    Alaboratory hydraulic cylinder measurement and control system provides, according to the working characteristics of an engineering machine, a large-scale comprehensive test platform with high precision for its hydraulic elements and hydraulic systems. The laboratory hydraulic cylinder measurement and control system can simulate various actual process conditions of the engineering machine under the control of a computer and load the tested elements and systems, so as to test the static and dynamic characteristics of the hydraulic elements and hydraulic systems under the simulated process conditions. However, the existing hydraulic cylinder test bed measurement and control system cannot perform high-speed, real-time and accurate acquisition and control on relevant performance parameters of a hydraulic cylinder on the test bed, requires human aid for manual measurement and control, and cannot realize high-speed, real-time and full-automatic measurement and control.
    Summary of the Invention An objective of the present invention is to propose a hydraulic cylinder test bed measurement and control system in order to solve the problems in the prior art.
    In order to achieve the above objective, the following technical solution is adopted in the present invention.
    A hydraulic cylinder test bed measurement and control system comprises a console, an electrical control cabinet, a measurement and control cabinet, three test beds and main oil source components, wherein the console comprises a display screen, an industrial control computer and secondary display instruments, and the industrial control computer is electrically connected with the display screen; the measurement and control cabinet comprises an analog data output card, a signal isolation module, an analog data acquisition card, and level conversion and hardware filtering components; the analog data output card is connected with the signal isolation module, and the analog data acquisition card is connected with the level conversion and hardware filtering components; the electrical control cabinet comprises a PLC module, a control power supply, buttons and switches, an intermediate relay, an indicator light and a sound-light alarm device; the control power supply, the buttons and switches, the intermediate relay, the indicator light and the sound-light alarm device are all electrically connected with the PLC module; each of the three test beds comprises a proportional overflow valve, a proportional reversing valve, a hydraulic branch oil line and branch oil line sensors; the proportional overflow valve and the proportional reversing valve are mechanically connected with the hydraulic branch oil line; the main oil source components comprise a solenoid valve, an oil pump, a hydraulic main oil line and main oil line sensors; and the solenoid valve is mechanically connected with the hydraulic main oil line.
    Preferably, the main oil line sensors comprise a pressure sensor, a flow sensor and a temperature sensor.
    Preferably, the branch oil line sensors comprise a pressure sensor, a flow sensor, a displacement sensor and an electronic balance sensor.
    Preferably, the proportional overflow valve and the proportional reversing valve are electrically connected with the signal isolation module. Preferably, the analog data acquisition card 1s a multifunctional data acquisition card. Preferably, the solenoid valve is electrically connected with the intermediate relay.
    Preferably, the branch oil line sensors are electrically connected with the level conversion and hardware filtering components. Beneficial effects of the present invention: test data is acquired, analyzed and processed, a predetermined measurement and control program is automatically selected and started in an automatic test mode according to the test items selected by a user, and instruction signals are sent to the analog output card and a PLC according to the predetermined action sequence, and finally output to actuating elements such as proportional overflow valves, proportional reversing valves, solenoid valves and contactors, thereby realizing real-time control and acquisition of various test data such as pressure, flow and displacement, full-automatic flow monitoring and control of more than ten specific performance test processes such as frequency response and step response of hydraulic cylinders, real-time data acquisition with high speed and high precision, and efficient and accurate real-time issuance of control commands, and ensuring the timeliness, accuracy, high efficiency and safety of the test measurement and control process.
    Brief Description of the Drawings Fig. 1 is a schematic structural diagram of a console of a hydraulic cylinder test bed measurement and control system according to the present invention; Fig. 2 1s a schematic structural diagram of an electrical control cabinet of the hydraulic cylinder test bed measurement and control system according to the present invention; Fig. 3 is a schematic structural diagram of main oil source components of the hydraulic cylinder test bed measurement and control system according to the present invention; Fig. 4 is a schematic structural diagram of a measurement and control cabinet of the hydraulic cylinder test bed measurement and control system according to the present invention; and Fig. 5 is a schematic structural diagram of a test bed of the hydraulic cylinder test bed measurement and control system according to the present invention.
    Detailed Description of the Embodiments A clear and complete description will be made to the technical solutions in the embodiments of the present invention below with reference to the accompanying drawings in the embodiments of the present invention.
    Apparently, the embodiments described are only part of the embodiments of the present invention, not all of them.
    Referring to Figs. 1-5, a hydraulic cylinder test bed measurement and control system comprises a console, an electrical control cabinet, a measurement and control cabinet, three test beds and main oil source components, wherein the console comprises a display screen, an industrial control computer and secondary display instruments; the secondary display instruments display the data of sensors, which is convenient for a worker to inquire and understand.
    The industrial control computer is electrically connected with the display screen, and a labVIEW-based full-automatic measurement and control software system is installed on the industrial control computer, which can perform various tests such as trial operation test, starting pressure characteristic test, pressure resistance test, durability test, stroke test, frequency response test and step test on a hydraulic cylinder.
    For each test, a variety of test processes and test parameters can be manually selected and set in advance, and specific test parameters can be set for a specific hydraulic cylinder.
    Real-time communication between DAQNavi Polymorphic VI and an analog data acquisition card and labVIEW application software are used to set various test parameters and test processes of the hydraulic cylinder, flow control of each test process, real-time acquisition and low-pass and smooth filtering of various test data such as pressure, flow and displacement, linear engineering quantity conversion, real-time dynamic data and curve display and storage, and generation and printing of various test reports, and the display screen displays the data on the industrial control computer, which is convenient for the worker to operate and understand.
    The measurement and control cabinet comprises an analog data output card, a signal isolation module, an analog data acquisition card, and level conversion and hardware filtering components.
    The analog data acquisition card is a multifunctional data acquisition card.
    The analog output card and the analog data output card are connected with the signal isolation module, and the analog data acquisition card is connected with the level conversion and hardware filtering components.
    The analog input realizes high-precision reading of data by means of differential access, the level conversion realizes the conversion 5 of 4-20 ma analog current signals of pressure, flow or the like to 1-5VDC voltage signals, and the input and output signal isolation and the hardware filtering realize the reliability and accuracy of analog data transmission.
    The electrical control cabinet comprises a PLC module, a control power supply, buttons and switches, an intermediate relay, an indicator light and a sound-light alarm device.
    The control power supply, the buttons and switches, the intermediate relay, the indicator light and the sound-light alarm device are all electrically connected with the PLC module.
    The PLC module controls and operates the connected devices.
    Each of the three test beds comprises a proportional overflow valve, a proportional reversing valve, a hydraulic branch oil line and branch oil line sensors.
    The branch oil line sensors detect and record the data on the three test beds, the branch oil line sensors are electrically connected with the level conversion and hardware filtering components, and the level conversion and hardware filtering components make the measured data of the branch oil line sensors more accurate and prevent the interference of external factors.
    The proportional overflow valve and the proportional reversing valve are electrically connected with the signal isolation module.
    The signal isolation can isolate external interference factors.
    The branch oil line sensors comprise a pressure sensor, a flow sensor, a displacement sensor and an electronic balance sensor.
    The proportional overflow valve and the proportional reversing valve are mechanically connected with the hydraulic branch oil line.
    The proportional overflow valve and the proportional reversing valve control the hydraulic branch oil line and quickly detect the hydraulic cylinder.
    The main oil source components comprise a solenoid valve, an oil pump, a hydraulic main oil line and main oil line sensors.
    The solenoid valve is electrically connected with the intermediate relay.
    The main oil line sensors comprise a pressure sensor, a flow sensor and a temperature sensor.
    Through these sensors, the data in a main oil source can be known in time.
    The solenoid valve is mechanically connected with the hydraulic main oil line.
    The hydraulic cylinder test bed measurement and control system comprises a console, a measurement and control cabinet, an electrical control cabinet, three test beds, and instruments for secondary display of pressure, displacement, speed and temperature, wherein the three test beds can simultaneously test three different hydraulic cylinders; the console comprises a display screen and an industrial control computer, and the industrial control computer is electrically connected with the display screen; the display screen displays the data on the industrial control computer; labVIEW application software is installed on the industrial control computer; the real-time communication between DAQNavi Polymorphic VI and an analog data acquisition card and the labVIEW application software realize configuration of various test parameters and test processes of the hydraulic cylinders, flow control of each test process, real-time acquisition and low-pass and smooth filtering of various test data such as pressure, flow and displacement, linear engineering quantity conversion, real-time dynamic data and curve display and storage, and generation and printing of various test reports; the measurement and control cabinet comprises an analog data output card, a signal isolation module, a data acquisition card and level conversion and hardware filtering components, wherein the signal isolation module and the level conversion and hardware filtering components ensure the reliability and accuracy of data transmission; the analog data output card is connected with the signal isolation module, and the signal isolation module ensures accurate output of the analog data; the data acquisition card is connected with the level conversion and hardware filtering components; each of the three test beds is provided with branch oil line sensors, a proportional reversing valve, a proportional overflow valve and a hydraulic branch oil line; the branch oil line sensors comprise pressure, flow and displacement sensors, which can detect the data of the hydraulic cylinders and acquire the test data of the hydraulic cylinders in real time; the electrical control cabinet comprises a PLC module, a control power supply, buttons and switches, an intermediate relay, an indicator light and a sound-light alarm device; the control power supply, the buttons and switches, the intermediate relay, the indicator light and the sound-light alarm device are all electrically connected with the PLC module, and the PLC module operates the connected devices; the main oil source components comprise a solenoid valve, an oil pump, a hydraulic main oil line and main oil line sensors, the solenoid valve is mechanically connected with the hydraulic main oil line, the solenoid valve directly controls the opening of the hydraulic main oil line and performs segmented main oil control, and the main oil line sensors detect various data in the main oil line, so as to acquire and detect the data in time.
    Described above are specific preferred embodiments of the present invention only, but the protection scope of the present invention is not limited thereto. Any skilled person who is familiar with this art could make equivalent substitutions or variations within the disclosed technical scope of the present invention according to the technical solutions of the present invention and the inventive concepts thereof, and these substitutions or variations shall fall within the protection scope of the present invention.
    权利要求:
    Claims (7)
    [1]
    A measurement and control system for hydraulic cylinder test benches, comprising a console, an electrical control box, a measurement and control box, three test benches and main components of an oil well, the console comprising a display, an industrial control computer and secondary display instruments, and the industrial operating computer is electrically connected to the screen; the measurement and control box includes an analog data output card, a signal isolation module, an analog data acquisition card and components for level conversion and hardware filtration, the analog data output card is connected to the signal isolation module, and the analog data acquisition card is analog data is associated with the level conversion and hardware filtration components; the electrical control box includes a PLC module, an operating power supply, buttons and switches, an intermediate relay, a pilot lamp and a sound and light alarm device; the operating power supply, buttons and switches, intermediate relay, pilot lamp and sound and light alarm device are all electrically connected to the PLC module; each of the three test stands includes a proportional overflow valve, a proportional reversing valve, a hydraulic oil tap and sensors on the oil tap; The proportional overflow valve and the proportional reversing valve are mechanically connected to the hydraulic oil branch; the main components of the oil source include a solenoid valve, an oil pump, a main hydraulic oil line and sensors on the main oil line; and the solenoid valve is mechanically connected to the main hydraulic oil line.
    [2]
    The hydraulic cylinder test bench measuring and operating system of claim 1, wherein the sensors on the main oil line comprise a pressure sensor, a flow sensor, and a temperature sensor.
    [3]
    The hydraulic cylinder test bench measurement and control system of claim 1, wherein the sensors on the oil branch include a pressure sensor, a flow sensor, a motion sensor, and an electronic balance sensor.
    [4]
    The hydraulic cylinder test bench measurement and control system of claim 1, wherein the proportional overflow valve and the proportional reversing valve are connected to the signal isolation module.
    [5]
    The hydraulic cylinder test bench measuring and operating system of claim 1, wherein the solenoid valve is electrically connected to the intermediate relay.
    [6]
    The hydraulic cylinder test bench measurement and control system of claim 1, wherein the analog data acquisition card is a multi-function data acquisition card.
    [7]
    The hydraulic cylinder test bench measurement and control system of claim 1, wherein the sensors on the oil branch are electrically connected to the level conversion and hardware filtration components.
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    引用文献:
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    法律状态:
    优先权:
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