KR100535678B1 - Method of sensing vibration of washing machine - Google Patents

Method of sensing vibration of washing machine Download PDF

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Publication number
KR100535678B1
KR100535678B1 KR1019980028249A KR19980028249A KR100535678B1 KR 100535678 B1 KR100535678 B1 KR 100535678B1 KR 1019980028249 A KR1019980028249 A KR 1019980028249A KR 19980028249 A KR19980028249 A KR 19980028249A KR 100535678 B1 KR100535678 B1 KR 100535678B1
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South Korea
Prior art keywords
washing machine
water level
change amount
tank
dehydration
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KR1019980028249A
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Korean (ko)
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KR20000008443A (en
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임형택
김형섭
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주식회사 엘지이아이
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Priority to KR1019980028249A priority Critical patent/KR100535678B1/en
Priority to JP11192900A priority patent/JP3124759B2/en
Priority to US09/352,380 priority patent/US6292966B1/en
Priority to CN99109812A priority patent/CN1117899C/en
Publication of KR20000008443A publication Critical patent/KR20000008443A/en
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Publication of KR100535678B1 publication Critical patent/KR100535678B1/en

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/48—Preventing or reducing imbalance or noise
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/40—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of centrifugal separation of water from the laundry
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/18—Washing liquid level
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

본 발명은 세탁기의 탈수동작시 세탁물의 편심에 의한 세탁조의 과도진동을 기존에 부착된 수위센서의 주파수변화량을 측정함으로써 감지하는 세탁기진동 감지방법에 관한 것이다.The present invention relates to a washing machine vibration detection method for detecting the excessive vibration of the washing tank by the eccentricity of the laundry during the dehydration operation of the washing machine by measuring the frequency change of the water level sensor attached to the existing washing machine.

본 발명에 의하면 기존의 진동감지스위치가 불필요하게 되고, 별도의 부가적인 장치가 없이 마이콤에 의한 제어로 이루어지므로 원가절감과 구조간소화의 효과를 거둘수 있다.According to the present invention, there is no need for the existing vibration detecting switch, and the control is performed by the microcomputer without any additional device, thereby reducing the cost and simplifying the structure.

Description

세탁기의 진동감지방법{Method of sensing vibration of washing machine}Method of sensing vibration of washing machine

본 발명은 세탁기의 진동감지방법에 관한 것이다. 특히 본 발명은 수위센서의 주파수 변화를 이용한 세탁기의 진동감지방법에 관한 것이다.The present invention relates to a vibration sensing method of a washing machine. In particular, the present invention relates to a vibration sensing method of a washing machine using a frequency change of the water level sensor.

일반적으로 세탁기는 세탁물을 세탁조에 넣은 후 급수를 하여 세탁을 행하고 세탁행정이 끝나면 탈수조를 회전시켜 탈수행정을 행함으로써 세탁을 종료하게 된다. 이 탈수과정에서 탈수조는 세탁물에서 물기를 제거하기 위해서 고속으로 회전이 이루어지게 되고 이 때 세탁물이 세탁조에 어느 한 쪽으로 편중되면 전후좌우로 심하게 진동이 발생하여 외조와 충돌을 일으키는 현상이 나타나게 된다.In general, a washing machine puts laundry into a washing tank and supplies water to wash the laundry, and when the washing administration is completed, the washing machine ends the washing by rotating the dehydrating tank to perform the dehydrating stroke. In this dehydration process, the dehydration tank is rotated at high speed to remove water from the laundry. At this time, if the laundry is biased in the washing tank, vibrations are severely generated in front, rear, left, and right, causing a collision with the outer tank.

따라서 상기 탈수조의 회전동작시 외조와 충돌이 일어나기 전에 정지시켜 재동작이 이루어질수 있게 하기 위해서 진동감지장치가 설치 사용되고 있다.Therefore, the vibration sensing device is installed and used to stop the collision with the outer tank during the rotation operation of the dehydration tank so that the operation can be performed again.

상기와 같은 목적으로 이용되는 종래의 세탁기 진동감지장치를 보면 도1에 도시된 바와같이, 세탁조(3)와 탈수조(2) 및 펄세이터(4)와 모터(5) 및 댐퍼(6)가 설치된 세탁기(1)의 케이스(7)와 세탁조(3)사이에 진동감지용 스위치(8)를 설치하여 구성하였다.Referring to the conventional washing machine vibration sensing device used for the above purpose, as shown in Figure 1, the washing tank 3, the dehydration tank (2), the pulsator (4), the motor (5) and the damper (6) The vibration sensing switch 8 was provided between the case 7 and the washing tank 3 of the installed washing machine 1, and was comprised.

따라서 상기와 같은 종래의 장치는 세탁후 모터(5)의 동작에 의해 탈수조(2)가 회전하면 상기 탈수조(2)내의 세탁물의 형태에 따라 탈수조(2)가 전후좌우 상하로 진동하면서 속도를 높여가게 된다.Therefore, in the conventional apparatus as described above, when the dehydration tank 2 is rotated by the operation of the motor 5 after washing, the dehydration tank 2 vibrates up, down, left, right, up and down according to the shape of the laundry in the dehydration tank 2. It will speed up.

이때 속도가 증가된 상태에서 세탁물이 고르게 퍼져 있으면 탈수조(2)는 약간의 진동 발생후 속도에 의해 진동은 더 이상 진행되지 않고 정상탈수속도에 도달하게 된다.At this time, if the laundry is spread evenly in the state in which the speed is increased, the dehydration tank 2 reaches a normal dehydration speed without further vibration by the speed after a slight vibration occurs.

그러나 세탁물이 고르게 퍼져 있지 않을 경우에는 세탁조(3)가 속도상승에 따라 전후좌우로 흔들리게 되고 이때 세탁기(1)의 케이스(7)와 세탁조(3)사이에 설치된 진동감지용 스위치(8)의 막대 부분을 건드리게 되어 세탁조와 케이스의 간격이 일정이상 접근하면 스위치(8)가 동작하게 되는 것이다.However, when the laundry is not evenly spread, the washing tub 3 swings back and forth and left and right as the speed increases, and at this time, the vibration sensing switch 8 installed between the case 7 and the washing tub 3 of the washing machine 1 If the bar is touched by the gap between the washing tank and the case more than a predetermined time switch 8 is to operate.

이때 마이컴이 스위치(8)의 동작시점부터 다시 원위치되는 시간을 측정하여 일정시간이 경과하면 진동이 심한 것으로 판단하고, 세탁물을 고르게 펴는 동작을 수행한 후 다시 실시하여 정상 탈수속도로 도달할 때까지 반복 동작하게 된다.At this time, the microcomputer measures the time of returning to the original position from the time of operation of the switch 8 and judges that the vibration is severe after a certain period of time, performs the operation of evenly spreading the laundry, and then performs it again until the normal dehydration speed is reached. It will be repeated.

따라서 상기와 같은 종래의 장치는 진동을 감지하는 스위치(8)를 별도로 설치하므로 이에 따른 상당하는 비용과 제조공정이 필요하였다.Therefore, the conventional device as described above requires a separate cost and manufacturing process according to the switch 8 for detecting the vibration separately.

또한 동작 스위치가 기계적인 온/오프 동작에 의해 진동상태를 감지하게 되므로 기계적인 초기 조립상태에 따라 진동을 감지하는 정도가 다르게 되어 세탁조에 스위치가 가깝게 설치되어 있으면 약간의 진동도 감지하여 불필요한 동작을 수행하게되고, 정상보다 멀리 설치된 경우에는 진동이 매우 커진 후에야 진동을 감지하게되기 때문에 스위치의 초기위치가 중요하므로 이를 정확히 설치하려면 추가비용이 발생하는 문제점이 있었다.In addition, since the operation switch detects the vibration state by the mechanical on / off operation, the degree of detection of the vibration is different depending on the mechanical initial assembly state. If the installation is farther than normal, since the vibration is detected only after the vibration is very large, the initial position of the switch is important, so there is a problem in that additional costs are required to install it correctly.

본 발명의 목적은 상기와 같은 종래의 진동감지스위치를 사용하지 않고 기존의 세탁기에 부착돼있는 수위센서의 출력을 이용하여 세탁기의 과도진동을 감지함으로써 종래 방법에의한 상기 문제점들을 해결한 세탁기 진동감지방법을 제공하는데 있다.An object of the present invention is to wash the vibration of the washing machine to solve the above problems by the conventional method by detecting the transient vibration of the washing machine using the output of the water level sensor attached to the existing washing machine without using the conventional vibration detection switch as described above To provide a detection method.

본 발명에 의한 세탁기 진동감지방법은, 세탁기 케이스 내부에 구비된 탈수조와, 상기 탈수조를 구동시키는 모터와, 상기 세탁기 케이스에 설치되고 코일 보빈과 상기 코일 보빈 내부를 출입하면서 소정의 인덕턴스가 출력되게 하는 코아를 포함하는 수위센서가 구비된 세탁기의 진동감지방밥에 있어서, 탈수 행정시, 상기 탈수조 진동에 의해 세탁기 케이스가 충격을 받으면, 그 충격력에 의해 상기 코아Washing machine vibration detection method according to the present invention, the dewatering tank provided in the washing machine case, the motor for driving the dewatering tank, the washing machine case is installed in the coil bobbin and the coil bobbin while the predetermined inductance is outputted In the vibrating fat rice of a washing machine equipped with a water level sensor comprising a core, if the washing machine case is impacted by the dehydration tank vibration during the dehydration stroke, the core by the impact force

가 코일 보빈 내부를 출입하여, 상기 수위센서로부터 소정의 인덕턴스가 출력되는 단계와; 상기 수위센서에서 출력된 인덕턴스에 의해 탈수 행정시 공진주파수(H2)가 획득되는 단계와; 상기 탈수행정시 공진주파수(H2)와 기 설정된 기준 공진주파수 (H1)의 편차(H2-H1)를 구하는 주파수변화량산출단계와; 상기 주파수변화량과 미리 설정된 기준변화량( )을 비교하는 단계와; 상기의 비교결과, 상기 주파수변화량이 상기 기준변화량보다 더 크면 상기 모터를 정지시키는 단계로 이루어짐을 특징으로 한다.Entering and exiting a coil bobbin to output a predetermined inductance from the water level sensor; Obtaining a resonant frequency (H2) during a dehydration stroke by an inductance output from the water level sensor; Calculating a frequency change amount for calculating a deviation (H2-H1) between the resonance frequency (H2) and the preset reference resonance frequency (H1) during the dehydration operation; The frequency change amount and a predetermined reference change amount ( Comparing); As a result of the comparison, when the frequency change amount is greater than the reference change amount, the motor is stopped.

본 발명에서 이용되는 기존 수위센서의 구성이 도2에 나타나 있다. 탈수조(2)내 수위의 수압이 벨로우즈(9)를 통해 코아(10)를 밀어올리면 코일(11)의 인덕턴스(L)가 증가하는 구조로 되어있다. 즉, 도3에 나타낸 바와같이 원통형의 코일 보빈(11) 가운데로 코아(10)를 출입하게 하면서 그 자속밀도를 변화시킨다. 그러면 상기 자속밀도의 변화에 따라 인덕턴스(L)가 변하게 되고, 이에따라 고정된 커패시턴스(C)와 공진을 일으켜 아래 식(1)과 같이 주파수가 변하게 된다.The configuration of the existing water level sensor used in the present invention is shown in FIG. When the water pressure in the dehydration tank 2 pushes the core 10 through the bellows 9, the inductance L of the coil 11 increases. That is, as shown in FIG. 3, the magnetic flux density is changed while allowing the core 10 to enter and exit the center of the cylindrical coil bobbin 11. Then, the inductance (L) is changed according to the change of the magnetic flux density, thereby causing a resonance with the fixed capacitance (C) to change the frequency as shown in Equation (1) below.

이와같이 변화하는 주파수를 이용하여 수위를 검출하는데 그 원리를 도3의 블록도로 나타냈다.The principle of the detection of the water level using the changing frequency is shown in the block diagram of FIG.

상기와 같은 수위센서를 이용한 본 발명의 진동감지원리를 도4를 참조하여 설명한다. 세탁행정이 끝난 후 탈수행정이 행하여질때 세탁물(12)의 편심에 의해 탈수조(2)에 진동이 발생하고 그 정도가 커지면 상기 세탁조(3)가 세탁기 케이스(13)를 타격(A점)하게 되고 그 충격력이 수위센서(14)에도 전달되며 이로인해 수위센서(14)의 코아(10)가 이동되고, 이에 따라 코일(11)의 인덕턴스(L) 변화를 LC 공진회로(15)에서의 공진주파수변화로 변환하고 이 변화를 공진주파수변화 감지수단(16)으로 감지 및 분석하여 탈수시의 탈수조(2)의 과도진동을 알 수 있다.The vibration sensing support of the present invention using the water level sensor as described above will be described with reference to FIG. When the dehydration process is performed after the washing process, vibration occurs in the dewatering tank 2 due to the eccentricity of the laundry 12, and when the degree increases, the washing tank 3 hits the washing machine case 13 (A point). And the impact force is transmitted to the water level sensor 14, thereby moving the core 10 of the water level sensor 14, thereby resonating the change in inductance L of the coil 11 in the LC resonant circuit 15. By converting into a frequency change and detecting and analyzing the change by the resonance frequency change detecting means 16, the transient vibration of the dehydration tank 2 at the time of dehydration can be known.

즉, 탈수행정시 상기 수위센서(14)로부터 출력된 인덕턴스(L)을 통해 탈수행정시 공진주파수(H2)가 획득되고, 상기 획득된 탈수행정시 공진주파수(H2)와 기 설정된 기준 공진주파수(H1)의 편차(H2-H1)에 따라 상기 탈수조(2)의 과도진동여부를 판단할 수 있게 된다.That is, the resonant frequency (H2) is obtained during the dehydration operation through the inductance (L) output from the water level sensor 14 during the dehydration operation, the obtained resonant frequency (H2) and the predetermined reference resonance frequency ( According to the deviation (H2-H1) of H1) it is possible to determine whether the excessive vibration of the dehydration tank (2).

도 5 는 상기에서 설명한 본 발명의 방법에 의해 세탁기의 진동을 감지한 결과를 나타낸 것이다. 도 5 의 a 는 세탁물이 없는 상태(진동이 작음)에서 탈수행정을 행할 경우 그 탈수시작 부분의 상기 수위센서(14)의 공진주파수 파형이고, 도 5의 b는 세탁물의 편심이 심한 상태(진동이 큼)에서 탈수행정을 행할 경우 탈수시작 부분의 상기 수위센서(14)의 공진주파수 파형을 나타낸 것이다. 도6에 보인 바와같이, 편심이 큰 경우 공진주파수의 변화량이 큼을 알 수 있다. 따라서, 상기 주파수변화량을 감지하면 현재의 탈수진동상태를 알 수 있고, 그 변화량과 마이콤내에 미리 기억시켜 놓은 기준변화량()을 비교하여 그 보다 더 큰 경우 모터를 정지시켜 탈수행정을 일단 중단함으로서 세탁조의 과도진동을 미리 방지할 수 있다.Figure 5 shows the result of detecting the vibration of the washing machine by the method of the present invention described above. 5A is a resonant frequency waveform of the water level sensor 14 at the start of dehydration when dehydration is performed in a state in which there is no laundry (small vibration), and b of FIG. In this case, the resonant frequency waveform of the water level sensor 14 at the start of dehydration is shown. As shown in Fig. 6, when the eccentricity is large, it can be seen that the change amount of the resonance frequency is large. Therefore, if the frequency change amount is detected, the current dehydration vibration state can be known, and the change amount and the reference change amount previously stored in the microcomputer ( ), It is possible to prevent excessive vibration of the washing tank in advance by stopping the motor and stopping the dehydration stroke once.

이때 상기 기준변화량은, 세탁기의 유형, 용량, 규격 등의 고유특성에 맞는 값들을 사전 실험에 의하여 구한 값들을 미리 설정해 놓은 값이며 또한 이 값은 세탁조가 외부 케이스와의 충돌이 최소인 진동상태일 때의 변화량을 실험적으로 구하여 얻어진 값을 사용한다.In this case, the reference change amount is a value obtained by pre-experiment of the values corresponding to the unique characteristics of the washing machine type, capacity, size, etc., and this value is a vibration state where the washing tank has a minimum collision with the outer case. The value obtained by experimentally calculating the change amount of time is used.

상기에서 설명한 본 발명의 실시예에서는 탈수행정을 행할 때 진동을 감지하는 경우를 설명하였으나, 모터가 온(ON) 상태인 경우에는 항상 수위센서의 주파수변화량을 측정하여 전체 세탁과정중에 과도진동을 감지하여 예방할수도 있다.In the above-described embodiment of the present invention, a case in which vibration is detected when performing dehydration stroke has been described. However, when the motor is in an ON state, the frequency change of the water level sensor is always measured to detect transient vibration during the entire washing process. You can also prevent it.

상기한 바와같이 본 발명은, 세탁조의 진동상태를 수위센서의 주파수변화량에 의하여 감지할 수 있으므로, 종래 세탁기에 사용된 진동감지스위치가 불필요하므로 원가가 절감되는 한편 구조가 간소화되는 이점이 있다. 또한 동작이 기계적인 스위치를 사용치 않으므로 수위센서의 기능이 정상적인 한 본 발명의 감지방법을 반영구적으로 사용할 수 있으므로 세탁기의 품질과 신뢰성을 향상시킬수 있는 효과가 있다.As described above, the present invention can detect the vibration state of the washing tank by the frequency change amount of the water level sensor, and thus, the vibration detection switch used in the conventional washing machine is unnecessary, thereby reducing the cost and simplifying the structure. In addition, since the operation does not use a mechanical switch, as long as the function of the water level sensor is normal, the detection method of the present invention can be used semi-permanently, thereby improving the quality and reliability of the washing machine.

도 1 은 종래의 세탁기의 구성개략도1 is a configuration diagram of a conventional washing machine

도 2 는 종래의 세탁기 수위센서의 내부구성을 나타낸 개략도Figure 2 is a schematic diagram showing the internal configuration of a conventional washing machine water level sensor

도 3 은 도2의 수위센서에 의한 수위측정원리를 나타낸 블록도3 is a block diagram showing the principle of level measurement by the water level sensor of FIG.

도 4 는 본 발명의 진동감지방법의 원리를 나타낸 도면4 is a view showing the principle of the vibration detection method of the present invention

도 5의 a 는 무부하탈수시 본 발명의 방법에 의한 주파수측정결과를 나타낸 그래프Figure 5a is a graph showing the frequency measurement results by the method of the present invention at no load dehydration

도 5의 b 는 세탁물량이 많은 경우 본 발명의 방법에 의한 주파수측정결과를 나타낸 그래프5 b is a graph showing the frequency measurement results by the method of the present invention when the amount of laundry is large

도 6 은 본 발명의 진동감지방법의 상세 흐름도6 is a detailed flowchart of the vibration sensing method of the present invention.

<도면중 주요 부분에 대한 부호설명><Code Description of Main Parts of Drawing>

1 : 세탁기 2 : 탈수조1: washing machine 2: dehydration tank

3 : 세탁조 4 : 펄세이터3: washing tank 4: pulsator

5 : 모터 6 : 댐퍼5: motor 6: damper

7 : 케이스 8 : 진동감지용 스위치7: case 8: vibration detection switch

9 : 벨로우즈 10 : 코어9: bellows 10: core

11 : 코일보빈 14 : 수위센서 11 coil bobbin 14 water level sensor

15 : LC 공진회로 16 : 주파수변화감지수단15 LC resonant circuit 16 frequency change detection means

Claims (2)

세탁기 케이스 내부에 구비된 탈수조와, 상기 탈수조를 구동시키는 모터와, 상기 세탁기 케이스에 설치되고 코일 보빈과 상기 코일 보빈 내부를 출입하면서 소정의 인덕턴스가 출력되게 하는 코아를 포함하는 수위센서가 구비된 세탁기의 진동 감지방법에 있어서, Is provided with a water level sensor including a dehydration tank provided in the washing machine case, a motor for driving the dehydration tank, and a core installed in the washing machine case and a core for outputting a predetermined inductance while entering and exiting the coil bobbin and the coil bobbin. In the vibration detection method of the washing machine, 탈수 행정시, 상기 탈수조 진동에 의해 세탁기 케이스가 충격을 받으면, 그 충격력에 의해 상기 코아가 코일 보빈 내부를 출입하여, 상기 수위센서로부터 소정 의 인덕턴스가 출력되는 단계와;When the washing machine case is impacted by the dehydration tank vibration during the dehydration stroke, the core enters and exits the coil bobbin by the impact force, and a predetermined inductance is output from the water level sensor; 상기 수위센서에서 출력된 인덕턴스에 의해 탈수 행정시 공진주파수(H2)가 획득되는 단계와;Obtaining a resonant frequency (H2) during a dehydration stroke by an inductance output from the water level sensor; 상기 탈수행정시 공진주파수(H2)와 기 설정된 기준 공진주파수(H1)의 편차 (H2-H1)를 구하는 주파수변화량산출단계와,Calculating a frequency change amount to obtain a deviation (H2-H1) between the resonance frequency (H2) and the preset reference resonance frequency (H1) during the dehydration operation; 상기 주파수변화량과 미리 설정된 기준변화량( )을 비교하는 단계와,The frequency change amount and a predetermined reference change amount ( ), 상기의 비교결과, 상기 주파수변화량이 상기 기준변화량보다 더 크면 상기 모터를 정지시키는 단계로 이루어짐을 특징으로 하는 세탁기의 진동감지방법.As a result of the comparison, the vibration detection method of the washing machine, characterized in that the step of stopping the motor if the frequency change amount is greater than the reference change amount. 세탁을 행하기 위한 탈수조 및 세탁조와, 상기 세탁조 하부에 장착된 모터와 상기 탈수조내에 채워진 물의 수위를 측정하기 위한 수위센서를 구비한 세탁기의 진동감지방법에 있어서, In a vibration sensing method of a washing machine having a dewatering tank and a washing tank for washing, a motor mounted on the lower portion of the washing tank and a water level sensor for measuring the water level of the water filled in the dewatering tank, 탈수조내 수위를 감지하는 수위센서의 공진주파수(H1)를 측정하는 단계와,Measuring the resonant frequency (H1) of the water level sensor for detecting the water level in the dehydration tank, 상기 공진주파수(H1)를 기준주파수로서 설정하는 단계와, Setting the resonance frequency (H1) as a reference frequency; 현재 모터동작상태가 온 상태인가를 확인하는 모터동작 확인단계와, Motor operation checking step of checking whether the current motor operation state is on; 상기 모터동작 확인단계에서 온 상태임이 확인된 경우 상기 수위센서의 공진 주파수(H2)를 측정하는 단계와, Measuring the resonance frequency (H2) of the water level sensor when it is determined that the motor operation is in an on state; 상기 공진주파수(H2)와 (H1)의 편차(H2-H1)를 구하는 주파수변화량 산출단계와, Calculating a frequency change amount to obtain a deviation (H2-H1) between the resonance frequency (H2) and (H1); 상기 주파수변화량과 미리 설정된 기준변화량()을 비교하는 단계와,The frequency change amount and a predetermined reference change amount ( ), 상기의 비교결과, 상기 기준변화량보다 더 큰 경우에 모터를 정지시키는 단계로 이루어짐을 특징으로 하는 세탁기의 진동감지방법.As a result of the comparison, the vibration detection method of the washing machine, characterized in that the step of stopping the motor when the greater than the reference change amount.
KR1019980028249A 1998-07-14 1998-07-14 Method of sensing vibration of washing machine KR100535678B1 (en)

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US09/352,380 US6292966B1 (en) 1998-07-14 1999-07-13 Method for sensing water level and vibration of washing machine and apparatus therefor
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KR20110022358A (en) * 2009-08-27 2011-03-07 엘지전자 주식회사 Washing machine and method for controlling the same

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JPH0994380A (en) * 1995-09-29 1997-04-08 Matsushita Electric Ind Co Ltd Washing machine
KR19990011408A (en) * 1997-07-23 1999-02-18 구자홍 Vibration and noise level control device by eccentricity of laundry during drainage / dehydration stroke of automatic washing machine and its control method
KR19990065354A (en) * 1998-01-12 1999-08-05 구자홍 Vibration sensing device and method of drum washing machine
JPH11309293A (en) * 1998-04-28 1999-11-09 Hitachi Ltd Washing machine

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JPH0994380A (en) * 1995-09-29 1997-04-08 Matsushita Electric Ind Co Ltd Washing machine
KR19990011408A (en) * 1997-07-23 1999-02-18 구자홍 Vibration and noise level control device by eccentricity of laundry during drainage / dehydration stroke of automatic washing machine and its control method
KR19990065354A (en) * 1998-01-12 1999-08-05 구자홍 Vibration sensing device and method of drum washing machine
JPH11309293A (en) * 1998-04-28 1999-11-09 Hitachi Ltd Washing machine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110022358A (en) * 2009-08-27 2011-03-07 엘지전자 주식회사 Washing machine and method for controlling the same
KR101690613B1 (en) * 2009-08-27 2016-12-28 엘지전자 주식회사 washing machine and method for controlling the same

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