Muzzle velocity is an very important parameter in the small caliber air defense flake system with timing fuze. The precise, instant measurement of the muzzle velocity of each round can greatly improve the weapon's air defense efficiency by adjusting the time constant according to its real muzzle velocity. The theory and implementation of the measuring system is introduced. As key point in the ystem, the error control steps are detailed to discuss especially about the magnet washer. Besides, to reduce time consummation for calculation, a novel arithmetic based on pre-calculated table was put forwarded. Experiments have shown that this muzzle velocity measuring system has the advantages of muzzle attachable, high precision and short process time.

Bridge monitoring systems used in practice employ conventional cables to communicate sensor measurements to a centralized data acquisition unit. Cable based systems have high installation costs and leave wires vulnerable to ambient signal noise corruption. In addressing these inherent drawbacks, a modular wireless monitoring system is proposed. Such a system promises lower capital and installation costs noise simultaneously ensuring reliable communication between sensing units.A vibration-electric generator has been proposed to generate electricity from the vibrations of the bridge to power an acceleration. To assess the feasibility of this idea, a model of the power produced from the generator is presented. It is concluded that the output power would be sufficient to power an acceleration sensor. Wireless sensing is prosperous in bridge health monitoring.

In normal research or engineer testing, sometime the signal from rotating objects is wanted. At that time, the traditional cable-necessary data acquisition system is not convenient or even unavailable in those testing situation. A small-size wireless date acquisition system was developed to accomplish the acquisition of signal where the common cable-necessary data acquisition system is inapplicable such as from rotating objects. This paper introduced a wireless date acquisition system which is based on digital transceiver module, and it describes the design issues and implementation of the system, especially on how to improve reliability. The application of the system in practical experiment has showed that it is satisfactory for the signal acquisition from rapidly revolving body.

In this paper, the distribution and characteristics of the Earth's magnetic field are analyzed. A approach of the turns-counting applied to proximity fuze based on the fluxgate sensor is proposed. It is deduced that the output signature of fluxgate sensor is the sine/cosine function of a projectile's rotational angle. The circuit used to process signal and a micro-stored data acquisition system are designed. The projectile's turns can be exactly gained by calculating the number of the output signal cycle. In this way, the basis for precisely controlling the point blasting for the pinning round' proximity fuze is provided.

In this paper, the details of micro linear zig-zag delay mechanisms is given, including some correlative figures, and the technical process of machining this micro-mechanisms by LIGA technique is shown, moreover athematics modeling for elasticity distortion of micro linear zig-zag delay mechanisms is established.