Big-damping-ratio-based double parameter speed and acceleration output vibration pickup

Abstract

The invention relates to a big-damping-ratio-based double parameter speed and acceleration output vibration pickup. A single freedom degree system consists of a spring, a damper and a motion part mass block, wherein the motion part mass block is suspended in a shell through the spring and the damper; a capacitance transduction speedometer is arranged on the upper part of the single freedom degreesystem; the capacitance transduction speedometer is formed by connecting a differential capacitor with a capacitive transducer; the differential capacitor is connected with the upper end of the motion part mass block; a coil transduction big damping ratio accelerometer is arranged on the lower part of the single freedom degree system; the lower end of the motion part mass block is connected with a coil rack; two groups of coils, namely an input coil and a feedback coil, are wound on the coil rack; and the two groups of coils are placed in a magnetic gap of a magnetic circuit system and connected with the input end and the output end of a servo amplifier respectively. The big-damping-ratio-based double parameter speed and acceleration output vibration pickup has a compact structure and reasonable design, and can measure vibration velocity of capacitance transduction and vibration acceleration of coil transduction in the single freedom degree system.

Description

technical field [0001] The invention relates to a vibration measurement device, in particular provides a dual-parameter output vibration pickup based on a large damping ratio for engineering vibration and earthquake observation, which can simultaneously measure vibration acceleration and vibration velocity. Background technique [0002] At present, sensors used for vibration measurement and earthquake observation can only measure a single vibration parameter, such as capacitance-for-capacity balance accelerometers, piezoelectric accelerometers, strain-type accelerometers, and coil-transducer accelerometers, which can only measure acceleration. Coil-type speedometers, passive servo-type speedometers, etc. can only measure speed. If you need to obtain acceleration and speed parameters at the same time, you need to use two vibration sensors, the accelerometer and the speedometer, which will bring inconvenience to the user and increase the cost of use, or use an accelerometer to...

AI Technical Summary

Problems solved by technology

[0002] At present, sensors used for vibration measurement and earthquake observation can only measure a single vibration parameter, such as capacitance-for-capacity balance accelerometers, piezoelectric accelerometers, strain-type accelerometers, and coil-transducer accelerometers, which can only measure acceleration. Coil-type speedometers, passive servo-type speedometers, etc. can only measure speed

If you need to obtain acceleration and speed parameters at the same time, you need to use two vibration sensors, the accelerometer and the speedometer, which will bring inconvenience to the user and increase the cost of use, or use an accelerometer to obtain the two vibration parameters after conditioning by the signal conditioner. The method inevitably uses an integrator to integrate the output voltage signal of the accelerometer to obtain a voltage signal proportional to the speed. However, the integration will inevitably bring errors, especially for long-period integration.

Images