Servo valve cable detector for test loading system
A loading system and servo valve technology, applied in the field of online detection of servo valve cables, can solve problems such as inability to detect servo valve cables online
Inactive Publication Date: 2015-11-04
CHINA AIRPLANT STRENGTH RES INST
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Problems solved by technology
[0003] Purpose of the present invention: the present invention is to solve the problem that the Aero ST test coordination loading system produced by the U.S. MTS company cannot detect the servo valve cable on-line, and provides a method for quickly and accurately judging whether the servo valve cable is on or off in the test loading system. Servo valve cable detector for valve current polarity
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[0013] The present invention will be described in further detail below by means of specific embodiments:
[0014] see figure 1 , which is a schematic diagram of the connection between the servo valve and the control system. It can be seen from the figure that the servo valve and the control system are connected through the servo valve cable. One end of the servo valve cable is connected to the end connector of the test loading controller. The test loading controller The end connector is connected with the test loading controller; the other end of the servo valve cable is connected with the servo valve.
[0015] see figure 2 , which is a schematic diagram of the connection between the servo valve cable detector and the loading control system. It can be seen from the figure that the detector and the loading control system are connected through the servo valve cable, and one end of the servo valve cable is connected to the end of the test loading controller. The test loading c...
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The invention belongs to servo valve cable on-line detection technologies, and particularly relates to a servo valve cable detector for a test loading system. The servo valve cable detector for the test loading system comprises a first light-emitting diode (red) and a second light-emitting diode (green) which are different in color and connected in parallel reversely. When a control system outputs a positive valve instruction, the first light-emitting diode (red) is turned on; when the control system outputs a negative valve instruction, the second light-emitting diode (green) is turned on; and otherwise, a servo valve cable is incorrectly connected in polarity. According to the invention, the direction and the polarity of servo valve current are judged by using the unilateral conductivity and an indication function of the light-emitting diodes (LEDs), and the two light-emitting diodes with different colors are ingeniously connected in parallel reversely, thereby forming the simple and practical servo valve cable detector. The servo valve cable detector not only can judge on-off of the cable, but also can judge the direction and the polarity of the valve current, and has the indication function.
Description
technical field [0001] The invention belongs to the online detection technology of servo valve cables, in particular to a servo valve cable detector used in a test loading system. Background technique [0002] The Aero ST test coordinated loading control system is an internationally advanced control system produced by MTS Corporation of the United States. It is widely used in structural strength tests and has the advantages of high loading accuracy and good coordination, but there are some serious defects. That is: the on-off of the servo valve cable and the positive and negative of the valve current cannot be detected conveniently and intuitively. An open or short circuit in the servo valve cable will render the actuator inoperable. If the servo valve cable is connected incorrectly, it will cause the actuator to move in the opposite direction, resulting in personal injury or damage to the specimen. During the aircraft strength test, the more test loading points, the more ...
Claims
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IPC IPC(8): G01R31/02G01R31/06G01R19/00
Inventor 魏新生高利娃刘振宇李宏亮张永兴吝继锋
Owner CHINA AIRPLANT STRENGTH RES INST