Servo valve cable detector for test loading system

• Main Authors: LIN JIFENG, GAO LIWA, ZHANG YONGXING, WEI XINSHENG, LI HONGLIANG, LIU ZHENYU
• Format: Patent
• Language: English
• Published: 04.11.2015
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

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.