A resonant sensor control system with an intermittent operation mode
A resonant sensor and control system technology, applied in the direction of using electric/magnetic devices to transmit sensing components, frequency measurement devices, etc., can solve the problem of weak output signals of the sensitive structure of the resonant sensor, and achieve the effect of improving the strength
Inactive Publication Date: 2009-03-04
BEIHANG UNIV
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[0005] The technical problem of the present invention is: to overcome the deficiencies of the prior art, to provide a resonant sensor control system that adopts an intermittent working mode, and to solve the problem that the output signal of the sensitive structure of the resonant sensor is relatively weak when a single frequency signal is used for excitation
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[0012] Such as figure 1 As shown, the sensor control system 2 of the intermittent working method of the resonant sensor is composed of a preamplifier 6, a frequency detector 5, a controller 4 and an excitation signal generator 3. The signal output by the vibration pickup element 7 of the sensitive structure 1 passes through the front The amplifier 6 amplifies, the frequency of the output signal of the pickup element 7 is measured by the frequency detector 5, the controller 4 controls the excitation signal generator 3 to generate the excitation signal, the excitation signal adopts a linear frequency modulation signal, and the resonator 8 of the sensitive structure 1 is linear Vibrate under the excitation of the frequency modulation signal. When the controller 4 controls the excitation signal to be disconnected, the resonator 8 is in a free vibration state, and its vibration frequency is the natural frequency of the resonator. After the excitation signal is disconnected, the con...
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This invention relates to a resonator transducer / sensor control system adopting intermittent service way. The invention includes preamplifier, frequency detector, controller and pumping signal generator. Pick-up component output signal transit preamplifier for magnifying, and by frequency detector to measure the frequency. Controller control pumping signal generator to create pumping signal; pumping signal adopts chirp signal; sensitivity structural resonator vibrate under stimulation of chirp signal, while controller control pumping signal disconnection, resonator get in free vibration state, and its vibration frequency is inherent rate of resonator. while pumping signal disconnection, controller control frequency detector to detect output signal frequency of pick-up component, thereby realize measuring of measured signal. The stimulating element in sensitivity structure and pick-up component could be one same component. This invention solves the problem that output signal of resonator transducer / sensor sensitivity structure is rather faint while adopting singleness frequency signal as stimulation.
Description
technical field [0001] The invention relates to a resonant sensor control system, in particular to a resonant sensor control system adopting an intermittent working mode. Background technique [0002] Under the action of the measured sensor, the natural frequency of the resonator of its sensitive structure changes, and the measured value can be measured by measuring the natural frequency of the resonator. The performance indicators such as repeatability, resolution and stability of the resonant sensor are suitable for the measurement of various parameters such as pressure, acceleration, force and density. [0003] Usually the sensitive structure of the resonant sensor needs to be combined with a closed-loop system to work. The usual closed-loop system includes an amplitude control link and a phase shift link. The amplitude controller is used to adjust the gain of the entire closed loop to meet the amplitude conditions of the self-excited closed-loop of the resonant sensor. ...
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IPC IPC(8): G01R23/02G01D5/244
Inventor 樊尚春蔡晨光邢维巍
Owner BEIHANG UNIV