KR970061190A

KR970061190A - Automatic adjustment of dust sensor sensitivity of vacuum cleaner

Info

Publication number: KR970061190A
Application number: KR1019960002941A
Authority: KR
Inventors: 최홍
Original assignee: 구자홍; Lg 전자 주식회사
Priority date: 1996-02-07
Filing date: 1996-02-07
Publication date: 1997-09-12

Abstract

본 발명은 전원 인가와 동시에 먼지센서 수신부측의 전압을 최적으로 센싱 동작점 전압이 되도록 발광부전류를 자동적으로 조정하고 먼지 흡입시 변하는 수신부 전압을 센싱하여 먼지센서의 감도가 최적이 되도록 조정하고자 한 진공청소기의 먼지센서 감도 자동 조정장치에 관한 것이다.The present invention is intended to adjust the current of the light emitting portion automatically so that the voltage at the dust sensor receiving portion side becomes the optimum sensing operating point voltage at the same time as power is applied and to adjust the sensitivity of the dust sensor to be optimal by sensing the receiving portion voltage, To a device for automatically adjusting the sensitivity of a dust sensor of a vacuum cleaner.

이러한 본 발명은 먼지센서의 수광부 전압과 전원전압을 비교하고 수광부 전압이 전원전압의 반절이 되도록 조절전압을 출력하는 제1비교부와, 제1비교부의 출력전압을 평활시켜 먼지센서의 발광부 구동전압으로 출력하는 평활부와, 평활부의 출력전압으로 구동하여 먼지량을 검출하고 수광부 전압을 출력하는 먼지센서와, 먼지센서의 수광부 전압과 기준 전압을 비교하여 그 결과전압을 먼지 감지 전압으로 출력하는 제2비교부와, 제2비교부의 출력전압으로 먼지량을 판단하고 그에 따른 흡입력 제어신호를 발생하는 마이콤을 구비한다.The first comparator compares the voltage of the light receiving unit of the dust sensor with the power supply voltage and outputs the regulated voltage so that the voltage of the light receiving unit becomes half of the power supply voltage. The first comparator smoothes the output voltage of the first comparator, A dust sensor for detecting the amount of dust and outputting a voltage of the light receiving unit by driving the output voltage of the smoothing unit, and a comparator for comparing the voltage of the light receiving unit of the dust sensor with the reference voltage, 2 comparator, and a microcomputer for determining the amount of dust by the output voltage of the second comparator and generating a suction power control signal corresponding to the amount of dust.

Description

Automatic adjustment of dust sensor sensitivity of vacuum cleaner

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제1도는 종래 진공청소기의 먼지 감지장치 구성도.FIG. 1 is a block diagram of a dust detecting device of a conventional vacuum cleaner. FIG.

제2도는 본 발명에 의한 진공청소기의 먼지센서 감도 자동 조정장치 구성도.FIG. 2 is a block diagram of a device for automatically adjusting the sensitivity of a dust sensor of a vacuum cleaner according to the present invention. FIG.

제3도는 제2도의 각부 상세 회로도.3 is a detailed circuit diagram of each part of Fig. 2; Fig.

제6도는 본 발명의 동작을 설명하기 위한 동작흐름도.FIG. 6 is an operation flow chart for explaining the operation of the present invention; FIG.

Claims

A first comparison means for comparing the voltage of the light receiving portion of the dust sensor with the power supply voltage and for outputting the regulated voltage so that the light receiving portion voltage becomes half of the power supply voltage; A dust sensor for detecting a dust amount and outputting a voltage of a light receiving unit by driving the output voltage of the smoothing means; And a microcomputer for determining a dust amount based on an output voltage of the second comparison means and generating a suction force control signal based on the output voltage of the second comparison means.

The microcomputer according to claim 1, wherein the microcomputer detects a dust detection signal at a predetermined cycle and counts the duration of the low signal when a low signal is input. When the count value is less than a predetermined number, it determines that dust is inhaled, And a controller for determining that there is no dust and decreasing a suction force when a signal transitioned from a state in which dust is detected to a state in which no dust is present for a predetermined period of time.

※ Note: It is disclosed by the contents of the first application.