Patent
Proximity sensor and proximity detection method
TLDR
In this article, the phase shift and amplitude change of a vibration wave caused by metal proximity was measured accurately by a simple circuit structure, consisting of a capacitor C connected wit a detection coil L, which outputs a drive signal to the resonating circuit, and which measures a phase shift based on a free vibration wave output in a dampening manner after the signal output of the drive signal stops.Abstract:
A proximity sensor such as a proximity switch, a displacement sensor, a distance sensor, a material sensor, a coin sensor, a metal sphere sensor for detecting the proximity of metal, with which to measure the phase shift and the amplitude change of a vibration wave caused by metal proximity accurately by a simple circuit structure. A proximity sensor (1) for detecting the proximity of metal, which is provided with a resonating circuit (2) consisting of a capacitor C connected wit a detection coil L, which outputs a drive signal to the resonating circuit (2), and which measures a phase shift and an amplitude change caused by metal proximity based on a free vibration wave output in a dampening manner from the resonating circuit (2) after the signal output of the drive signal stops.read more
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TL;DR: In this article, a proximity sensor has an inductor-capacitor resonator (10), which has a detecting coil and a resonance capacitor, and a time counter (51) is configured to determine the length of the period of a positive voltage.
References
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Patent
Proximity or presence switch controlled by an external signal
TL;DR: In this paper, a nach dem induktiven Wirkprinzip arbeitende Naherungs- oder Anwesenheitsschalteranordnung, which is dadurch gekennzeichnet, is found in a Schwingkreis in vorgegebenen Zeitabstanden erregt wird um eine fremderregte vorzugsweise uber mehrere Perioden abklingende Schwingung zu erzeugen.
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Chiral aryloxypropionates, and the use thereof as dopes in liquid-crystal phases
TL;DR: Arylcarboxylates of 2-hydroxypropionates are known, amongst other compounds, as dopes for converting tilted smectic liquid-crystal phases into ferroelectric liquid crystal phases as mentioned in this paper.
Patent
Proximity switch operating without contact
TL;DR: In this article, a non-contact proximity switch having a step-like stimulable resonant circuit (L 1, C 1) has, to at least one jump response of the oscillating circuit in such a stimulation, a characteristic of the time course of the decaying vibration magnitude capture can, compares a at least 1 reference voltage level (U At least one counter (7, 10) has at least within a portion of the release time of the step response of a number (DA) is deviated those half-waves of the jump response, the peak value (U
Patent
Displacement sensor with oscillating (resonant) circuit magnetically coupled to a conducting target
TL;DR: In this article, an excitation and measurement signals are transmitted in optical form in order to allow part of the electronic circuits to be moved out of the hostile medium in which the target may be situated.
Patent
Induction proximity detector
TL;DR: In this article, the authors propose to reduce the power consumption of the inductive proximity detector having an oscillation circuit by making a period when a switch controlling charging/discharging of the oscillation circuits is closed nearly equal to a half of a pseudo vibration period of the circuit.