Research on Test Conditions of Sealed-Relay Remainders Based on High-Speed Video Technology - Intelligent Computing for Sustainable Energy and Environment - page 505

Research on Test Conditions of Sealed-Relay Remainders
Based on High-Speed Video Technology

Guotao Wang 1 , Shujuan Wang 1 , Kang Li 2 , Pengfei Niu 1 , and Shicheng Wang 3

1 School of Electrical Engineering and Automation, Harbin Institute of Technology,
Harbin, China
2 School of Electronics, Electrical Engineering and Computer Science,
Queen's University Belfast, BelfastBT9 5AH, UK
3 Aviation College, PLA, China
{star5892,wsc_lce}@163.com, [e-mail]

Abstract. Particle Impact Noise Detection (PIND) is an important method for
detecting remainders within space relays. During the PIND process of sealed
relays, the movement of remainders often cannot be observed directly. A new
method to analyze the movement of remainders based on high-speed video
technology is therefore proposed in this paper. The PIND process in special
transparent cavities is studied, and the parameters to describe the kinetic
movements of remainders are calculated based on image processing and data
analysis. Then the PIND test conditions are explored with this method.
Experimental results show that this method can capture the motion state of
remainders in real time and calculate the remainder motion parameters
effectively. This method offers an intuitive and reliable means of verifying the
PIND test conditions.

Keywords: High-speed video technology, movement analysis method,
reminders, Particle Shock Noise Detection.

1 Introduction

The space relay is a kind of sealed relays which are often used for signal transmission,
control execution and power distributions in spacesystems. Its reliability is vitalin
assuringthe reliability of the whole system[1, 2]. However, remainders, such as solder
sinters, metal dusts, colophony and aqua sealsin the relayscan causemalfunctioning,
short-circuit or open-circuit, which potentially leads to major space flight accidents[3-
5]. The Particle Impact Noise Detection (PIND) is an effective method to detect the
existence of remainders in a space relay. Figure 1 shows the diagram of the PIND
system. The PIND system generates a series of shocks and vibrations. The shocks and
vibrations activate the particles to impact on the relay shell. The energyof the collision
is transformed to sound and voltage signals, which areused to estimate the existance of
remainders. Figure 2 shows the typical remainder movement in a sealed relay.
The widely employed PIND method nowadays may fail from time to time in
industrial applications. Test conditions are claimed to a key factor. Inappropriate test
conditions may not be able to free the remainders which lead to a wrong result, or