US 8,797,188 B2Granted

Low power operated loop type vehicle detecting apparatus including a count controller

AssigneeMoru Inven Co., Ltd.

InventorJeong Jun Lee

Life of this patent

Estimating the term…

Loading patent…

Abstract

The present invention relates to a low power operated loop type vehicle detecting apparatus, and particularly, to a low power operated loop type vehicle detecting apparatus that comprises an LC resonator with a loop coil installed in a detecting area, a resonance oscillation circuit unit, and a vehicle behavior determination unit. The vehicle detecting apparatus further comprises: a behavior determination clock generator for generating a behavior determination clock; a count controller for setting clock count time in a steady-state period; a behavior determination clock counter for counting the behavior determination clock during the clock count time set by the count controller; and a vehicle behavioral state determiner for determining a vehicle behavioral state in a detecting area, based on the counting value of the behavior determination clock counter. Power consumption can thereby be reduced.

Claims4

Dependent claims

A low power operated loop type vehicle detecting apparatus, comprising:

a resonance oscillation circuit unit that includes an LC resonator having a loop coil mounted in a detecting area and an oscillator connected with the LC resonator and generates an analog oscillation signal having a frequency determined according to an inductance value of the loop coil;
and
a vehicle behavior determination unit that determines a vehicle behavior in a detecting area based on the analog oscillation signal output from the resonance oscillation circuit unit,
wherein the vehicle behavior determination unit comprises:
a behavior determination clock generator that generates a behavior determination clock having a frequency larger than the analog oscillation signal output from the resonance oscillation circuit unit;
a count controller that periodically turns-on/off operating voltage supplied to the oscillator and sets clock count time in a steady-state period of the analog oscillation signal output from the resonance oscillation circuit unit;
a behavior determination clock counter that counts the behavior determination clock generated in the behavior determination clock generator for the clock count time set in the count controller;
and
a vehicle behavioral state determiner that determines a vehicle behavioral state in a detecting area based on a count value in the behavior determination clock counter.

6 more elements

A low power operated loop type vehicle detecting apparatus, comprising:

a resonance oscillation circuit unit that includes an LC resonator having a loop coil mounted in a detecting area and an oscillator connected with the LC resonator and generates an analog oscillation signal having a frequency determined according to an inductance value of the loop coil;
a vehicle behavior be unit that determines a vehicle behavior in a detecting area based on the analog oscillation signal output from the resonance oscillation circuit unit;
an analog-digital converter that converts an analog oscillation signal output from the resonance oscillation circuit, unit into a digital oscillation signal;
a counter controller that periodically turns-on/off operating voltage supplied to the oscillator and sets clock count time based on a digital oscillation signal period corresponding to a steady-state period of an analog oscillation signal output to the resonance oscillation circuit unit in the digital oscillation signal output from the analog-digital converter;
a behavior determination clock counter that counts the digital oscillation signal generated in the analog-digital converter for the clock count time set in the count controller;
and
a vehicle behavioral state determination unit that determines a vehicle behavioral state in a detecting area based on the count value in the behavior determination clock counter.

4 more elements

Dependencies are inferred from the claim text.