Sampling device for comparing amplitude and frequency variation difference

Abstract

The invention discloses an amplitude and frequency variation difference comparative sampler, which is characterized in that the sampler consists of an oscillator 1, a loop L, capacitors C1 and C2, a reference circuit 3, a pull-up resistor R, an amplitude extraction circuit 2, a reference refresh circuit 4 and a comparator 5; wherein, the oscillator 1 is connected with the loop L which outputs electromagnetic wave; the oscillator 1 is coupled with the reference circuit 3 and the amplitude extraction circuit 2 by the capacitors C1 and C2; the pull-up resistor R is connected with the capacitor 2;the comparator 5 detects the detected signal; a trigger processes and outputs signal through a driving circuit; meanwhile, the refresh circuit 4 refreshes the reference. The sampler has the advantages of stable performance, good heat resistant performance and high accuracy, which is not restricted by environmental conditions and is widely used in the fields such as a plurality of intelligent meters, automatic instruments and particular working environments.

Description

technical field [0001] The invention belongs to the technical field of electronic measurement, in particular to a sampler of amplitude-frequency variation comparison type. The sampler is a non-contact sampler with good penetration performance, extremely low power consumption, little influence by ambient temperature, and high accuracy. Easy to apply. [0002] The micro-power consumption digital displacement sensor constituted by the present invention is mainly used for measuring the translational displacement or rotational displacement, translational velocity or rotational velocity of an object, and can meet the measurement application requirements in related fields. [0003] The micro-power consumption flow sensor formed by applying the present invention can work normally in a large temperature difference environment, and an environment that requires micro-power consumption conditions, has high reliability, and can be directly applied to heat meters, intelligent water meters, ...

AI Technical Summary

Problems solved by technology

The resistance strain type obtains signals by sampling the stress changes on the device, which is a contact type; the capacitive type has a certain limit in the detection distance and is easily affected by external environmental factors; the inductive type and eddy flow type , high power consumption; photoelectric type and grating type, high power consumption, and no penetrating ability; magnetic induction type, easily affected by the magnetic field, and easy to absorb ferromagnetic substances, easy to demagnetize in a higher temperature environment

Therefore, none of the above-mentioned devices can meet the requirements of some special working environments, for example, the requirements of micro power consumption, large temperature difference resistance, high accuracy, high reliability, etc. The present invention is designed to meet this series of special requirements. Designed

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