Signal conditioning circuit for acceleration sensor with high g value

Abstract

The invention discloses a signal conditioning circuit for an acceleration sensor with a high g value. The signal conditioning circuit is composed of an isolation amplification circuit, an alternating-current coupled circuit, a first voltage following circuit, a voltage bias circuit, a low-pass filter circuit and a second voltage following circuit sequentially connected in series; the isolation amplification circuit is used for performing signal isolation amplification and power supply isolation of a sensing signal Signal_in output by the acceleration sensor with the high g value and then outputting an isolation amplified signal Signal_out1; and the low-pass filter circuit is a unit gain two-order voltage-controlled voltage source low-pass filter circuit constructed by utilizing an integrated operational amplifier. According to the invention, the signal waveform can be improved; frequency confusion while discretizing is prevented; adverse effects of noise are overcome in the event that the signal and a noise spectrum are not overlapped; the signal to noise ratio is increased; furthermore, aiming at different attack targets, sensor signals can be effectively modified; preceding-stage analogue signals easy to identify and process are provided for a burst control algorithm precisely damaged by a hard target penetration warhead; and the signal conditioning circuit can stably work in a 100000g impact environment.

Description

technical field [0001] The invention relates to a high-g value acceleration sensor signal conditioning circuit, and the high-g value can reach 100000g. Background technique [0002] The hard target penetrating fuze is one of the key factors to effectively destroy the hard target, and its core is the adaptive blast point control technology under the high overload environment. [0003] The penetration of hard targets is a very complex physical process, and the impact between projectiles and targets is also a very complex phenomenon, accompanied by huge changes in motion parameters and energy. To realize the counting of the target layer and holes, it is necessary to select a feature with the most obvious change, which is easy to detect and utilize. During the penetration process, the loss of kinetic energy is mainly transformed into heat energy and shock wave energy, etc. The physical quantities in this form do not change significantly, and detection is also very difficult. H...

AI Technical Summary

Problems solved by technology

During the penetration process, the loss of kinetic energy is mainly transformed into heat energy and shock wave energy, etc. The physical quantity of this form does not change significantly, and the detection is also very difficult

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