JP2000210495A - Unbalance amount detector for spin dryer - Google Patents
Unbalance amount detector for spin dryerInfo
- Publication number
- JP2000210495A JP2000210495A JP11014596A JP1459699A JP2000210495A JP 2000210495 A JP2000210495 A JP 2000210495A JP 11014596 A JP11014596 A JP 11014596A JP 1459699 A JP1459699 A JP 1459699A JP 2000210495 A JP2000210495 A JP 2000210495A
- Authority
- JP
- Japan
- Prior art keywords
- amount
- rotation speed
- rotation
- speed
- contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
- Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は脱水機回転時、回
転数の速度変動検出により、脱水槽と外箱との接触検出
により、脱水衣類のアンバランス量を検出する脱水機の
アンバランス検出装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unbalance detection device for a dehydrator that detects the amount of unbalance of dehydrated clothes by detecting a speed change of the rotation speed during rotation of the dehydrator and detecting contact between the dehydration tank and the outer box. About.
【０００２】[0002]
【従来の技術】従来この種の全自動洗濯機の脱水機は、
被洗濯物（以下「負荷」と呼ぶ）の偏りによって脱水槽
に振動が生じ、その負荷に大きな偏りがあると脱水槽の
振動は異常振動となる。そこで、負荷の大きな偏りによ
って生じる異常振動による弊害を防止するために、異常
振動を検出することを目的として幾つかの手段が施され
ている。2. Description of the Related Art Conventionally, this type of fully automatic washing machine dehydrator is
Unevenness of the laundry (hereinafter referred to as “load”) causes vibration in the dehydration tub, and if the load has a large deviation, the vibration of the dehydration tub becomes abnormal. Therefore, in order to prevent the adverse effects caused by the abnormal vibration caused by the large deviation of the load, some means are provided for the purpose of detecting the abnormal vibration.
【０００３】一般的には、脱水機のアンバランス検出装
置は、脱水回転の初期に生じる脱水槽の揺れを検出する
ため、外箱の内側角部の空間部に機械的なレバーを設
け、脱水槽の大きな揺れの場合そのレバーが脱水槽を内
装した外槽に接触することにより検出するもので、その
レバーの外槽への接触情報により脱水工程を停止する構
成としていた。In general, an unbalance detection device of a dehydrator is provided with a mechanical lever in a space at an inner corner of an outer box in order to detect shaking of a dehydration tub occurring at an early stage of dehydration rotation. In the case of large shaking of the water tank, the lever is detected by contacting the lever with the outer tank in which the dewatering tank is provided, and the dehydration process is stopped based on information on the contact of the lever with the outer tank.
【０００４】また、前記のような接触方式とは異なる方
式として、特開平３−２１５２９１号公報には感震器を
用いて、また特開平８−６６５８３号公報には赤外光の
発光・受光素子を用いて各々脱水槽、外槽の振動を検出
するものがある。As a method different from the contact method as described above, a vibration sensor is used in Japanese Patent Application Laid-Open No. 3-215291, and emission and reception of infrared light are disclosed in Japanese Patent Application Laid-Open No. 8-66583. Some devices detect vibrations of a dehydration tub and an outer tub, respectively, using an element.
【０００５】さらに特開平９−１０４６９号公報に開示
されたものは、モータによる脱水槽の回転立ち上がり時
において、回転検出手段によって脱水槽の回転数の変動
度合いを検出し、検出した変動度合いに応じて適正な脱
水運転を行うようにしたものである。[0005] Further, in the apparatus disclosed in Japanese Patent Application Laid-Open No. 9-10469, when the rotation of the spin-drying tub is started by the motor, the rotation detecting means detects the fluctuation of the rotation speed of the spin-drying tub, and according to the detected fluctuation. In this way, a proper dehydration operation is performed.
【０００６】[0006]
【発明が解決しようとする課題】従来の脱水機のアンバ
ランス検出装置は以上のように構成されているので、以
下のような課題があった。まず、機械的なレバーを用い
るものは、レバーの取り付け箇所が概ね一カ所であるた
め、脱水槽内の同位置のアンバランス量でもレバー取り
付け位置により、レバーヘ外槽が当たる場合と当たらな
い場合があって検出が不安定であった。また外槽とレバ
ーの隙間、位置等が検出精度に与える影響が大きいた
め、機種対応の設計精度、組立精度に対する要求が過大
であった。さらにレバーに駆動される機械的なスイッチ
を用いているため、洗濯時の水かかり等によるスイッチ
の動作不良対策の課題があった。The imbalance detecting device for a conventional dehydrator is configured as described above, and has the following problems. First of all, when using a mechanical lever, the lever is installed at almost one place.Therefore, even if the imbalance amount at the same position in the dehydration tank, the outer tank hits the lever depending on the lever installation position, and sometimes does not hit the lever. The detection was unstable. Further, since the gap, position, and the like between the outer tank and the lever greatly affect the detection accuracy, the requirements for design accuracy and assembly accuracy corresponding to the model are excessive. Further, since a mechanical switch driven by the lever is used, there is a problem of a malfunction of the switch due to splashing of water during washing.
【０００７】また、振動検出用センサとして、感震器や
赤外線素子を用いたものでは、当然のことながら部品点
数が増え、コスト高になると共に構成が大きくなるもの
であった。また、振動検出用センサが増えた分だけ精度
調整や故障要因への対応処理が複雑となると共に組み立
て作業性が悪くなり、具体的には赤外線素子の場合、埃
や水等に対する対策手段を講じる必要がある等の課題が
あった。Also, in the case of using a seismic sensor or an infrared element as a vibration detecting sensor, the number of parts is increased, the cost is increased, and the configuration is increased as a matter of course. In addition, as the number of vibration detection sensors increases, the process of adjusting accuracy and dealing with failure factors becomes complicated, and assembly workability deteriorates. Specifically, in the case of an infrared element, measures are taken against dust and water. There were issues such as necessity.
【０００８】また、特開平９−１０４６９号公報のもの
は、モータによる脱水槽の回転立ち上がり時に、回転数
の変動度合いを検出する方式のため、電源電圧の変動に
よる回転トルクの違いにより回転立ち上がり特性が異な
る。従って、回転数変動度合いも当然異なるため、適正
なアンバランス量として検出が不可能であった。さら
に、電源電圧検出による補正も考えられるが、検出手段
と補正手段を必要とするために構成が複雑になるという
課題があった。In Japanese Patent Application Laid-Open No. 9-10469, since the degree of change in the number of rotations is detected when the rotation of the spin-drying tub is started by the motor, the rotation start-up characteristic is determined by the difference in the rotation torque due to the change in the power supply voltage. Are different. Therefore, since the degree of rotation speed fluctuation naturally differs, it is impossible to detect an appropriate unbalance amount. Further, although correction by power supply voltage detection is also conceivable, there is a problem that the configuration becomes complicated because a detection unit and a correction unit are required.
【０００９】さらにこの従来例においては、洗濯物の量
を判定するパルス発生回路（回転検出手段）と、回転数
変動度合いを検出するセンサ回路（回転数検出手段）が
各々別々なセンサを使用いること、また予め無負荷にて
変動度合いを検出し、その値を不揮発性メモリに記憶し
実使用時には記憶した値を差し引いて変動度合いを導く
等の構成であり、部品点数が増えコスト高になると共に
構成が複雑になるという課題があった。Further, in this conventional example, a pulse generating circuit (rotation detecting means) for judging the amount of laundry and a sensor circuit (rotation number detecting means) for detecting the degree of rotation speed fluctuation use separate sensors. In addition, the degree of fluctuation is detected in advance with no load, the value is stored in a non-volatile memory, and the value stored in actual use is subtracted to derive the degree of fluctuation. This increases the number of parts and increases the cost. In addition, there was a problem that the configuration became complicated.
【００１０】さらにこの従来例においては、モータの立
ち上がり時に特化した検出であるため、定常回転、即ち
高速回転時に異常振動には対応できない構成となってい
る。現状の負荷の種類は多様化し、例えば水分を透過し
ないウェア等がある。これらを脱水槽に入れて運転した
時、負荷が袋状になった場合、水分が抜けず立ち上がり
時には水分移動により適度なアンバランス補正となって
異常振動が少なく、高速回転時に残った水により大きな
アンバランスを発生する可能性があった。このような異
常振動が立ち上がり時には発生せず、高速時に発生する
場合に対応できないという課題があった。Further, in this conventional example, since the detection is specialized when the motor is started, the configuration is such that it cannot cope with abnormal vibration during steady rotation, that is, high speed rotation. At present, the types of loads are diversified, and there are, for example, wears that do not transmit moisture. When these are put into a dehydration tub and operated, if the load becomes a bag-like shape, the moisture does not escape, and at the time of start-up, a proper imbalance correction is made due to the movement of moisture, so that abnormal vibration is small, and the water remaining during high-speed rotation is large. Unbalance could occur. There has been a problem that such abnormal vibration does not occur at the time of rising and cannot be coped with when it occurs at a high speed.
【００１１】この発明は上記のような課題点を解消する
ためになされたものであり、脱水槽回転立ち上がり及び
高速回転領域全てにおいて、電源電圧変動、負荷量・種
類等に影響されず、簡単な構成で低コスト化が図れ、検
出精度、信頼性、作業性の向上が図れる脱水機のアンバ
ランス量検出装置を得ることを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is simple in the entire dehydration tank rotation start-up and high-speed rotation regions without being affected by power supply voltage fluctuation, load amount and type, and the like. It is an object of the present invention to provide an unbalance amount detection device for a dehydrator that can reduce the cost and improve the detection accuracy, reliability, and workability.
【００１２】[0012]
【課題を解決するための手段】この発明の請求項１に係
る脱水機のアンバランス検出装置は、外箱に弾性的に吊
下支持された受水槽と、 受水槽に内装された脱水槽
と、脱水槽を回転駆動するためのモータと、モータを駆
動する運転制御手段と、脱水槽或いはモータの回転数を
検出する回転速度検出手段と、回転速度検出手段が出力
する回転速度信号を受け、脱水槽の回転による振動で受
水槽が外箱内面に接触したときの速度変動量からその接
触量を検出する外箱接触量検出手段とを備えて構成され
ている。According to a first aspect of the present invention, there is provided an unbalance detecting device for a dehydrator, comprising: a water receiving tank elastically suspended and supported by an outer box; A motor for rotationally driving the dehydration tub, operation control means for driving the motor, a rotation speed detection means for detecting the rotation speed of the dehydration tub or the motor, and a rotation speed signal output by the rotation speed detection means, An outer case contact amount detecting means for detecting the amount of contact from the speed fluctuation amount when the water receiving tank comes into contact with the inner surface of the outer case due to the vibration caused by the rotation of the dehydration tub.
【００１３】この発明の請求項２に係る脱水機のアンバ
ランス検出装置は、前記外箱接触量検出手段が回転速度
検出手段が検出した回転速度信号の周期性の速度変動成
分から受水槽が外箱内面に接触したときの速度減速量の
みを抽出する減速成分抽出手段と、減速成分抽出手段が
抽出した速度減速量を所定のしきい値と比較して受水槽
の外箱内面との接触量を判定する判定手段とからなるも
のである。According to a second aspect of the present invention, there is provided an unbalance detecting device for a dehydrator, wherein the outer tank contact amount detecting means detects the water receiving tank from the periodic speed fluctuation component of the rotation speed signal detected by the rotation speed detecting means. Deceleration component extracting means for extracting only the speed deceleration amount when contacting the inner surface of the box, and comparing the speed deceleration amount extracted by the deceleration component extracting means with a predetermined threshold value, and the amount of contact with the inner surface of the outer case of the water receiving tank. And determination means for determining
【００１４】この発明の請求項３に係る脱水機のアンバ
ランス検出装置は、前記外箱接触量検出手段が回転速度
検出手段が検出したパルス状の回転速度信号の周期性の
速度変動成分から脱水槽が外箱内面に接触したときの速
度減速量のみを抽出する減速成分抽出手段と、減速成分
抽出手段が抽出した速度減速量を複数パルス数毎に移動
積分して平滑する周期成分平滑手段と、周期成分平滑手
段が平滑した移動積分減速量を所定のしきい値と比較し
て受水槽の外箱内面との接触量を判定する判定手段とか
らなるものである。According to a third aspect of the present invention, there is provided an unbalance detecting device for a dehydrator, wherein the outer box contact amount detecting means removes the periodic speed fluctuation component of the pulse-shaped rotation speed signal detected by the rotation speed detection means. Deceleration component extraction means for extracting only the speed deceleration amount when the water tank contacts the inner surface of the outer box; and periodic component smoothing means for smoothing by moving and integrating the speed deceleration amount extracted by the deceleration component extraction means for each of a plurality of pulses. Determining means for comparing the amount of movement integral deceleration smoothed by the periodic component smoothing means with a predetermined threshold value to determine the amount of contact with the inner surface of the outer case of the water receiving tank.
【００１５】この発明の請求項４に係る脱水機のアンバ
ランス検出装置は、前記外箱接触量検出手段が回転速度
検出手段が検出した回転速度信号から回転速度を演算
し、その回転速度と所定の基準回転速度とを比較し、回
転速度が基準回転速度未満のときは立ち上がり回転領域
と判断して前記判定手段のしきい値を立ち上がり回転領
域に対応した値に設定し、回転速度が基準回転速度以上
のときは定常回転領域と判断して前記判定手段のしきい
値を定常回転領域に対応した値に設定する回転速度検定
手段を備えてなるものである。According to a fourth aspect of the present invention, there is provided an unbalance detection apparatus for a dehydrator, wherein the outer box contact amount detection means calculates a rotation speed from a rotation speed signal detected by the rotation speed detection means, and calculates the rotation speed and a predetermined rotation speed. When the rotation speed is lower than the reference rotation speed, the rotation speed is determined to be the rising rotation region, and the threshold value of the determination means is set to a value corresponding to the rising rotation region, and the rotation speed is set to the reference rotation speed. When the speed is equal to or higher than the speed, the engine is provided with a rotation speed test means for judging the engine to be in the steady rotation area and setting the threshold value of the judgment means to a value corresponding to the steady rotation area.
【００１６】[0016]
【発明の実施の形態】実施の形態１ 図１はこの発明の実施の形態１である全自動洗濯機の脱
水機のアンバランス量検出装置を示すブロック図、図２
は同アンバランス量検出装置の回転センサを示す斜視
図、図３は図２の回転センサの回路図、図４は図２の回
転センサの出力波形図、図５は同アンバランス量検出装
置の回転速度検出手段の計測波形図、図６は洗濯時に使
用される負荷量検出手段の計測波形図、図７は理想状態
と異常振動発生時の脱水槽の回転状態を示す説明図、図
８は異常振動時に受水槽が外箱に接触する説明図、図９
はアンバランス量をパラメータとしたパルス長計測部の
計測波形図、図１０はパルス長計測部の出力を入力とし
て外箱接触量検出手段により加工した波形成形図であ
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a block diagram showing an unbalance amount detecting device for a dehydrator of a fully automatic washing machine according to Embodiment 1 of the present invention, and FIG.
3 is a perspective view showing a rotation sensor of the unbalance amount detection device, FIG. 3 is a circuit diagram of the rotation sensor of FIG. 2, FIG. 4 is an output waveform diagram of the rotation sensor of FIG. 2, and FIG. FIG. 6 is a measurement waveform diagram of the rotation speed detection means, FIG. 6 is a measurement waveform diagram of the load amount detection means used at the time of washing, FIG. 7 is an explanatory diagram showing an ideal state and a rotation state of the dehydration tub when abnormal vibration occurs, and FIG. Explanatory drawing in which the water receiving tank contacts the outer box during abnormal vibration, FIG.
FIG. 10 is a waveform chart of the pulse length measurement unit using the unbalance amount as a parameter, and FIG. 10 is a waveform shaping diagram processed by the outer box contact amount detection means with the output of the pulse length measurement unit as an input.
【００１７】図１において１は外箱、２は防振バネ等３
ａを有する弾性支持機構３を介して外箱１に弾性的に吊
下支持された受水槽、４はこの受水槽２内に回転自在に
配置された洗濯兼脱水槽で、その中心底部に回転翼５、
側壁には複数の脱水孔４ａが設けられている。６は洗濯
兼脱水槽４の下部中央に連結した中空の脱水槽軸で、受
水槽２の下部中央孔縁周に設けられたブラケット７に嵌
挿されている。In FIG. 1, 1 is an outer box, 2 is an anti-vibration spring, etc. 3
A water receiving tub 4 elastically suspended and supported by the outer box 1 via an elastic support mechanism 3 having a a is a washing and dewatering tub rotatably disposed in the water receiving tub 2, and rotates at the center bottom thereof. Wing 5,
A plurality of dehydration holes 4a are provided on the side wall. Reference numeral 6 denotes a hollow dewatering tub shaft connected to the lower center of the washing and dewatering tub 4, which is fitted into a bracket 7 provided around the lower central hole of the water receiving tub 2.
【００１８】８は脱水槽軸６内に嵌挿された回転翼５の
回転翼軸、９はこの回転翼軸８及び脱水槽軸６の下端部
に連結された槽側プーリ、１０は前記脱水槽軸６の略中
央部に設けられ、槽側プーリ９の回転を洗濯脱水槽４へ
断続するクラッチ機構、１１は回転翼軸８の略中央部に
設けられ、槽側プーリ９の回転を減速させる減速機構、
１２はモータ側プーリ１３及びベルト１４を介して前記
槽側プーリ９へ回転を与えるモータで、受水槽２の下面
に設置される。１５は受水槽２の底面に設けられた排水
口、１６はこの排水口１５の排水弁である。Reference numeral 8 denotes a rotary blade shaft of the rotary blade 5 inserted into the dewatering tank shaft 6, 9 denotes a tank-side pulley connected to the lower end of the rotary blade shaft 8 and the dewatering tank shaft 6, and 10 denotes a pulley. A clutch mechanism is provided at a substantially central portion of the water tank shaft 6 to interrupt the rotation of the tub-side pulley 9 to the washing / dewatering tub 4. A clutch 11 is provided at a substantially central portion of the rotary blade shaft 8 to reduce the rotation of the tub-side pulley 9. Deceleration mechanism,
Reference numeral 12 denotes a motor that rotates the tank-side pulley 9 via a motor-side pulley 13 and a belt 14, and is installed on the lower surface of the water receiving tank 2. Reference numeral 15 denotes a drain port provided on the bottom surface of the water receiving tank 2, and reference numeral 16 denotes a drain valve of the drain port 15.
【００１９】１７はモータ１２への給電／断電、及び回
転数制御を行う運転制御手段、１８は回転速度検出手段
であり、脱水槽軸６の周縁に設けられた回転センサ１８
ａの出力を受け、パルス長計測部１８ｂによって回転速
度を算出する。１９はパルス長計測部１８ｂの計測値に
基づいて、洗濯工程時等に負荷量を検出する負荷量検出
手段、２０は脱水時に受水槽２が外箱１に接触する度合
いを検出する外箱接触量検出手段であり、パルス長計測
部１８ｂの計測値に基づいて、接触時の回転速度の減速
を判断する減速成分抽出部２０ａと、洗濯兼脱水槽４の
一周期に同期した速度変動を除去する周期成分平滑部２
０ｂと、この二つの処理部の出力によって接触量を判定
する判定部２０ｃとで構成されている。２１は洗濯工
程、脱水工程等の各種工程を選択する操作盤である。Reference numeral 17 denotes operation control means for supplying / disconnecting power to the motor 12 and controlling the number of rotations. Reference numeral 18 denotes a rotation speed detection means, and a rotation sensor 18 provided on the periphery of the dehydration tub shaft 6.
In response to the output of a, the pulse speed measuring unit 18b calculates the rotation speed. 19 is a load amount detecting means for detecting a load amount during a washing process or the like based on the measurement value of the pulse length measuring unit 18b, and 20 is an outer case contact for detecting the degree of contact of the water receiving tub 2 with the outer case 1 during dehydration. A deceleration component extraction unit 20a that is a quantity detection unit that determines the deceleration of the rotation speed at the time of contact based on the measurement value of the pulse length measurement unit 18b, and removes speed fluctuation synchronized with one cycle of the washing and dewatering tub 4 Periodic component smoothing unit 2
0b and a determination unit 20c that determines the amount of contact based on the outputs of the two processing units. Reference numeral 21 denotes an operation panel for selecting various steps such as a washing step and a dehydrating step.
【００２０】図２に示す回転センサ１８ａは脱水槽軸６
に固着されたＮ極とＳ極が例えば１８分割で均等配列さ
れたマグネット１８ａ１と、マグネット１８ａ１に近接
するホールＩＣ１８ａ２とを組み合わせて構成されてい
る。この回転センサ１８ａは図３に示す回路構成であ
り、マグネット１８ａ１が１／１８回転で図４に示す１
サイクルの矩形パルスをホールＩＣ１８ａ２から発生さ
せるように構成されている。The rotation sensor 18a shown in FIG.
For example, a magnet 18a1 in which N poles and S poles are fixedly arranged in, for example, 18 divisions and a Hall IC 18a2 close to the magnet 18a1 are combined. This rotation sensor 18a has the circuit configuration shown in FIG.
It is configured to generate a rectangular pulse of the cycle from the Hall IC 18a2.
【００２１】図５はモータ１２をオンしたときの回転翼
５又は脱水槽４の回転を検出した回転センサ１８ａのパ
ルス信号から、パルス長計測部１８ｂが３パルス長の計
測を１パルスずつずらして移動計測する状態を示してい
る。このパルス長計測手段８では、３パルス長を１パル
スづつずらして移動計測し、３パルス長の平均値を演算
して出力していく。このように３パルス長の平均値を演
算して出力していくようにしたのは、回転センサ１８ａ
のマグネット１８ａ１の着磁ピッチのばらつきによる誤
差を平均化し、検出精度の向上を図るためである。図６
は洗濯時に使用される負荷量検知手段の計測波形図を示
し、モータ１２をオンしてからオフした後の回転翼５の
減衰回転を検出した回転センサ１８ａのパルス長が、負
荷量の違いによって所定の値に達するまでの時間が相違
し、負荷量が大きい程早く減速されてパルス長が所定の
値に達することが分かる。従って、パルス長計測部１８
ｂの信号を受け負荷量検出手段１９により負荷量を検出
することができる。FIG. 5 shows that the pulse length measuring unit 18b shifts the measurement of three pulse lengths by one pulse from the pulse signal of the rotation sensor 18a that detects the rotation of the rotor 5 or the dehydration tub 4 when the motor 12 is turned on. This shows a state in which movement measurement is performed. The pulse length measuring means 8 moves and measures the three pulse lengths by one pulse at a time and calculates and outputs the average value of the three pulse lengths. The reason for calculating and outputting the average value of the three pulse lengths is that the rotation sensor 18a
This is because the error due to the variation of the magnetized pitch of the magnet 18a1 is averaged to improve the detection accuracy. FIG.
Shows a measurement waveform diagram of the load amount detecting means used at the time of washing. The pulse length of the rotation sensor 18a which detects the damped rotation of the rotary blade 5 after the motor 12 is turned on and then turned off depends on the difference in the load amount. It can be seen that the time required to reach the predetermined value differs, and that the larger the load, the faster the deceleration and the pulse length reaches the predetermined value. Therefore, the pulse length measuring unit 18
The load amount can be detected by the load amount detecting means 19 in response to the signal b.
【００２２】以下、本発明の脱水機のアンバランス検出
原理及び方法について説明する。まず、アンバランスが
存在した状態で脱水槽４を回転させ、回転速度を上昇さ
せると、回転初期域で、受水槽２の水平振動の固有振動
数と脱水槽の回転周波数との一致点（これを一次共振点
と呼ぶ）で共振が発生して振動幅が大きくなる。この回
転速度領域を通過し更に回転速度を上昇させると、受水
槽２の傾き振動の固有周波数と脱水槽４の回転周波数と
の一致点（これを二次共振点と呼ぶ）で共振が発生し振
動幅が大きくなる。Hereinafter, the principle and method of detecting imbalance of the dehydrator according to the present invention will be described. First, when the dehydration tub 4 is rotated in a state where the imbalance exists, the rotation speed is increased, and in the initial rotation region, the point of coincidence between the natural frequency of the horizontal vibration of the water receiving tub 2 and the rotation frequency of the dehydration tub (this Is referred to as a primary resonance point), and the vibration width increases. When the rotation speed is further increased after passing through the rotation speed region, resonance occurs at a point where the natural frequency of the tilt vibration of the water receiving tank 2 and the rotation frequency of the dewatering tank 4 coincide (this is called a secondary resonance point). The vibration width increases.
【００２３】図７の（ａ）はアンバランスが無い状態で
の理想状態での脱水槽４の回転状態を示し、図７の
（ｂ）は二次共振における傾き振動発生時の脱水槽４の
回転状態を示す。ここで、傾き振動とは、図７の（ｂ）
のように回転軸の向きが変化しながら脱水槽４が回転し
ている状態である。例えると、独楽の回転軸が傾きなが
ら円を描いて回転する歳差運動（みそすり運動とも言
う）と似た動作が発生する。言い換えると回転軸歳差運
動は公転、脱水槽４はその軸を中心とした自転で回転す
る。FIG. 7A shows the rotation state of the dewatering tub 4 in an ideal state without any imbalance, and FIG. 7B shows the rotation of the dewatering tub 4 when tilt vibration occurs in the secondary resonance. Indicates a rotating state. Here, the tilt vibration refers to FIG.
The dehydration tub 4 is rotating while the direction of the rotating shaft is changing as shown in FIG. For example, a motion similar to a precession motion (also called a sleet motion) in which the rotation axis of the top moves in a circle while tilting occurs. In other words, the rotation axis precession revolves, and the dewatering tank 4 rotates around its axis.
【００２４】この状態では回転軸は垂直ではなく常に傾
いている為に、アンバランス部は高い位置から低い位置
に回転する時の重力による加速と、逆に低い位置から高
い位置に回転する時の減速が発生し、脱水槽４の１回転
中で加速と減速を繰り返すため回転速度に周期性をもっ
た回転速度の変動成分が発生する。このような脱水槽４
の１回転中に発生する回転速度の変動成分は、脱水槽４
の回転を検出する回転センサ１８ａのパルス信号が脱水
槽４の１回転で１８パルス出力されることから、回転速
度を示すパルス長時間に現れることになる。In this state, since the rotation axis is not vertical but always inclined, the unbalanced portion is accelerated by gravity when rotating from a high position to a low position, and conversely, when rotating from a low position to a high position. Since the deceleration occurs and the acceleration and deceleration are repeated during one rotation of the dewatering tub 4, a fluctuation component of the rotation speed having periodicity in the rotation speed is generated. Such a dewatering tank 4
The fluctuation component of the rotation speed generated during one rotation of the
Since a pulse signal of the rotation sensor 18a for detecting the rotation of the spinning drum 18 is output by 18 pulses in one rotation of the dewatering tub 4, the pulse signal indicating the rotation speed appears for a long time.
【００２５】また、上記水平振動及び傾き振動により、
脱水槽４を内装する受水槽２が同様に振動し、振動量が
多くなると図８に示すような外箱１の内壁面に接触し、
更に振動量が多くなると内壁面に衝突する動作が発生す
る。この外箱１への接触が発生すると、受水槽２の振動
量が接触により制限され、その制限量がブラケット７、
脱水槽軸６へと伝達されて脱水槽４が瞬間的に減速す
る。この回転速度の減速量を、回転センサ１８ａとパル
ス長計測部１８ｂから成る回転速度検出手段１８によっ
て計測し、後述する外箱接触量検出手段２０によって、
速度減速量を周期性の速度変動成分から抽出して接触
量、即ちアンバランス量を判定する。Further, by the horizontal vibration and the tilt vibration,
The water receiving tank 2 in which the dewatering tank 4 is installed vibrates similarly, and when the amount of vibration increases, it contacts the inner wall surface of the outer box 1 as shown in FIG.
When the amount of vibration further increases, an operation of colliding with the inner wall surface occurs. When contact with the outer box 1 occurs, the amount of vibration of the water receiving tank 2 is limited by the contact, and the amount of the
The dehydration tub 4 is transmitted to the dehydration tub shaft 6 and instantaneously decelerates. The deceleration amount of the rotation speed is measured by the rotation speed detection unit 18 including the rotation sensor 18a and the pulse length measurement unit 18b, and is detected by the outer box contact amount detection unit 20 described later.
The contact amount, that is, the unbalance amount is determined by extracting the speed deceleration amount from the periodic speed fluctuation component.
【００２６】さらに、脱水槽４の異常振動はアンバラン
ス負荷により、上記したような、回転立ち上がり時に発
生する一次共振、二次共振のみに発生するものでは無
く、定常高速回転時にも発生する場合がある。通水性の
少ない衣類等を入れ脱水運転すると、衣類が袋状になり
水が溜まった状態になる場合があり、この時一次／二次
共振点では水の移動によってアンバランスが抑制され異
常振動を起こさず、定常高速回転領域において水がアン
バランス負荷となり異常振動を発生する事が実験により
確かめられている。この場合においても受水槽２が外箱
１に接触すれば、脱水槽４の回転に減速成分が発生する
ために、回転速度検出手段１８と外箱接触量検出手段２
０でアンバランス量を判定できる。Further, the abnormal vibration of the dewatering tank 4 is not caused only by the primary resonance and the secondary resonance generated at the time of the rotation start as described above due to the unbalance load, but may also be generated at the time of the steady high speed rotation. is there. When the dehydration operation is performed by putting clothes with low water permeability into the clothes, the clothes may be in a bag shape and water may be accumulated. At this time, at the primary / secondary resonance points, the imbalance is suppressed due to the movement of the water and abnormal vibration is caused. It has been confirmed by experiments that water does not become unbalanced and causes abnormal vibration in the steady high-speed rotation region. Also in this case, if the water receiving tank 2 comes into contact with the outer box 1, a deceleration component is generated in the rotation of the dewatering tank 4, so that the rotation speed detecting means 18 and the outer box contact amount detecting means 2
The imbalance amount can be determined with 0.
【００２７】次に、本発明の脱水機のアンバランス量検
出装置の動作について、主に回転速度検出手段１８と外
箱接触量検出手段２０の処理内容を、図９、図１０を用
いて説明する。図９は脱水槽内に取り付けたアンバラン
スウェイト量を、アンバランス無し／中（例えば１Ｋ
ｇ）／大（例えば２Ｋｇ）と３つのパラメータとした回
転速度計測手段１８のパルス長計測部１８ｂで得られた
計測波形図である。縦軸にこのパルス長、横軸に槽の回
転回数を示し、（ａ）は回転立ち上がり時、（ｂ）は定
常回転時をそれぞれ示す。また計測波形図に示すパルス
長は、図５に示したように複数パルス（例えば３パル
ス）のパルス長を合計し１パルス長に平均した値であ
り、これにより回転センサ１８ａの着磁バラツキ等を吸
収出来る。Next, the operation of the apparatus for detecting the amount of unbalance in a dehydrator according to the present invention will be described with reference to FIGS. 9 and 10, mainly the processing contents of the rotational speed detecting means 18 and the outer box contact amount detecting means 20. I do. FIG. 9 shows the amount of unbalance weight installed in the dehydration tank, with no unbalance / medium (for example, 1K
FIG. 9 is a measurement waveform diagram obtained by the pulse length measurement unit 18b of the rotation speed measurement unit 18 with three parameters g) / large (for example, 2 kg). The vertical axis indicates the pulse length, the horizontal axis indicates the number of rotations of the tank, (a) indicates the start of rotation, and (b) indicates the steady rotation. The pulse length shown in the measurement waveform diagram is a value obtained by summing the pulse lengths of a plurality of pulses (for example, three pulses) and averaging the pulse length as shown in FIG. 5, and thereby the magnetization variation and the like of the rotation sensor 18a. Can be absorbed.
【００２８】例えば１回転当たり１８パルス出力とし、
図９の（ｂ）から１パルス長を４．３ｍｓと読み取る
と、定常時の回転数は（１／（１８×４．３×１
０-3））×６０＝７７５ｒｐｍと計算することができ
る。図から立ち上がり時、定常回転時共に、アンバラン
スが大きくになるに従い回転数の脈動が１回転当たりの
周期で大きくなり、その脈動量は定常回転側の高速回転
になるに従い少なくなっている事が分かる。脈動量が最
も多いのは、パルス長２０ｍｓ前後（回転数１７０ｒｐ
ｍ）であり、前記説明した二次共振点はこの回転数付近
で有ることが分かる。For example, when 18 pulses are output per rotation,
When one pulse length is read as 4.3 ms from FIG. 9B, the rotation speed in the steady state is (1 / (18 × 4.3 × 1).
0 −3 )) × 60 = 775 rpm. From the figure, it can be seen that the pulsation of the number of rotations increases with the period of one rotation as the unbalance increases at both rising and steady rotations, and the amount of pulsation decreases as the rotation speed increases toward the steady rotation side. I understand. The largest amount of pulsation occurs when the pulse length is around 20 ms (rotation speed 170 rpm).
m), and it can be seen that the above-described secondary resonance point is near this rotational speed.
【００２９】また、パラメータとしたアンバランス量の
中で、立ち上がり回転時に実際に受水槽２が外箱１に接
触するアンバランス大時のパルス長に注目すると、図９
の（ａ）に示すように脈動振幅幅が一定ではなく、また
４回転回数までは１回転当たりの周期に同期しない脈動
が発生していることが分かる。この不均一で周期性の無
い動作が外箱１に接触することにより起こるパルス長の
変化、即ち速度変動の変化であり、この状態を捉えるこ
とにより外箱１への接触を検出することが可能となる。FIG. 9 shows the pulse length of the imbalance when the water receiving tank 2 actually contacts the outer case 1 during the start-up rotation.
As shown in (a), it can be seen that the pulsation amplitude width is not constant, and pulsations that are not synchronized with the cycle per rotation occur up to four rotations. This non-uniform and non-periodic operation is a change in the pulse length caused by contact with the outer case 1, that is, a change in the speed fluctuation. By capturing this state, the contact with the outer case 1 can be detected. Becomes
【００３０】次に図１０を用いて外箱接触量検出手殴２
０における処理波形を説明する。図１０の（ａ）は減速
成分抽出部２０ａによる減速パルス長成分のみの微分波
形、（ｂ）は周期成分平滑部２０ｂによる上記微分波形
の１８パルス分の移動積分波形であり、縦軸はパルス長
を計測する際のカウンタ値、横軸は槽の回転回数を示
す。図１０の（ａ）の微分波形は図９の（ａ）の脈動す
るパルス長波形のうちから右方上がりのパルス長が増大
する波形成分、即ち減速成分のみを微分して得られたも
のであり、パルス長波形の脈動振幅幅が大きいほどこの
微分量が大きくなることを表している。また、図１０に
おけるカウンタ値は計測分解能を示し、例えば１カウン
ト当たり８μｓクロックとし、パルス長計測を１０ｍｓ
とした場合には１０ｍｓ／８μＳ＝１２５０カウントと
なり、この値で処理を行っている。Next, referring to FIG.
The processing waveform at 0 will be described. 10A shows a differential waveform of only the deceleration pulse length component by the deceleration component extracting unit 20a, and FIG. 10B shows a moving integral waveform for the 18 pulses of the differential waveform by the periodic component smoothing unit 20b. The counter value for measuring the length, and the horizontal axis indicates the number of rotations of the tank. The differential waveform of FIG. 10A is obtained by differentiating only the waveform component in which the pulse length rising to the right increases from the pulsating pulse length waveform of FIG. 9A, that is, only the deceleration component. This indicates that the larger the pulsation amplitude width of the pulse length waveform, the larger this differential amount becomes. The counter value in FIG. 10 indicates the measurement resolution, for example, 8 μs clock per count, and pulse length measurement of 10 ms.
In this case, 10 ms / 8 μS = 1250 counts, and processing is performed using this value.
【００３１】図１０の（ａ）の微分波形を見ると、パル
ス長波形の脈動振幅幅が大きいほどこの微分量が大きく
なることを表しており、回転回数１０回程度までにアン
バランス大時は微分量１００を大きく越える箇所が複数
現れ、中時は微分量５０レベル、無し時は３０レベルで
安定していることが分かる。従って、減速成分抽出部２
０ａが回転回数に対応したパルス長から抽出した速度減
速量に対して、判定部２０ｃで例えばしきい値を１００
に設定し、１００以上は接触による異常大と判断し、１
００未満は正常と判断することも可能であるが、ノイズ
等による誤動作を考慮し次の処理を行う。Looking at the differential waveform in FIG. 10A, it is shown that the larger the pulsating amplitude of the pulse length waveform, the larger this differential amount becomes. It can be seen that a plurality of locations that greatly exceed the differential amount 100 appear, and that the differential amount is stable at 50 levels when it is medium and 30 levels when there is no differential amount. Therefore, the deceleration component extraction unit 2
For example, a threshold value of 100a is determined by the determination unit 20c with respect to the speed deceleration amount extracted from the pulse length corresponding to the number of rotations.
And 100 or more are judged to be abnormal due to contact, and 1
A value less than 00 can be determined to be normal, but the following processing is performed in consideration of a malfunction due to noise or the like.
【００３２】図１０の（ｂ）は速度減速量である減速成
分の微分値を１周期の１８パルスで移動積分した波形で
あり、これにより周期成分を平滑化し、回転周期成分以
外の高い周期成分である速度減速量を際ださせること、
即ち外箱１への接触情報を際だたせることが可能とな
る。図で明らかなように、アンバランス無し時は移動積
分量（カウンタ値）が１００以下で安定し、アンバラン
ス大時は１０回転程度まで５００以上のランダムな波形
が現れ、ピークの大きい箇所で外箱接触が発生している
事を実験により確認できている。従って、立ち上がり回
転時に周期成分平滑部２０ｂが平滑した移動積分値に対
して、判定部２０ｃで例えばしきい値を５００に設定
し、移動積分値５００以上は接触による異常大と判断
し、５００未満は正常と判断することも可能となる。FIG. 10B shows a waveform obtained by moving and integrating the differential value of the deceleration component, which is the amount of speed deceleration, with 18 pulses in one cycle, thereby smoothing the cycle component and providing a high cycle component other than the rotation cycle component. To make the amount of speed deceleration stand out,
That is, it is possible to make the contact information on the outer box 1 stand out. As is apparent from the figure, when there is no unbalance, the moving integral amount (counter value) is stable at 100 or less, and when the unbalance is large, a random waveform of 500 or more appears up to about 10 rotations, and the external waveform appears at a place where the peak is large. Experiments have confirmed that box contact has occurred. Therefore, the threshold value is set, for example, to 500 in the determination unit 20c with respect to the moving integral value smoothed by the periodic component smoothing unit 20b during the rising rotation, and the moving integral value of 500 or more is determined to be abnormally large due to contact, and is less than 500. Can be determined to be normal.
【００３３】また、パラメータとしてアンバランスウエ
イトの設置位置、即ち初期アンバランス位置を洗濯機の
脱水槽前面、左面、後面、右面の４ヵ所とした実験にお
いても、従来の機械式スイッチはアンバランス位置に対
し依存性があり、例えば現状の左隅位置にあるスイッチ
では後面に対してはスイッチが動作しづらいという結果
に対し、外箱接触方式を用いた本方式によれば、アンバ
ランス位置に対しての依存性が無く、全ての位置におい
て良好に検出できるという結果を得られた。In an experiment in which the position of the unbalanced weight as a parameter, ie, the initial unbalanced position was set at four positions on the front, left, rear, and right sides of the spin-drying tub of the washing machine, the conventional mechanical switch was unbalanced. For example, with the switch at the current left corner position, it is difficult for the switch to operate on the rear surface, whereas according to this method using the outer case contact method, Was obtained, and there was no dependency on, and the result was that detection was possible at all positions.
【００３４】このように、洗濯兼脱水槽４のアンバラン
スを検出するために用いる回転センサ１８ａに、洗濯兼
脱水槽４の負荷量を検出するために用いていた既設の回
転センサを利用し、受水槽２の外箱１への接触は洗濯機
の構成部材を利用し、機械式スイッチや特別の検出セン
サを用いないために、装置全体が安価となり、回転セン
サは機械的接触部が無いために安全性、耐久性、組立作
業性の向上を図ることができる。また、外箱接触情報を
利用するために、従来の機械式スイッチ一ヵ所から外箱
４面を利用できるため検出精度が向上すると共に、外箱
への接触が発生しても機械式スイッチが動作しない等の
誤動作を防止できる。また、従来の脱水槽の回転立ち上
がり時に、回転数の変動度合いを検出する方式のように
電源電圧の変動や負荷量に影響されることなく、安定し
た検出精度の向上を図ることができる。As described above, the existing rotation sensor used for detecting the load of the washing and dewatering tub 4 is used as the rotation sensor 18a for detecting the imbalance of the washing and dewatering tub 4. The contact of the water receiving tub 2 with the outer box 1 uses the components of the washing machine and does not use a mechanical switch or a special detection sensor, so that the entire apparatus is inexpensive, and the rotation sensor has no mechanical contact. In addition, safety, durability and assembly workability can be improved. In addition, since the outer case 4 can be used from one conventional mechanical switch to use the outer case contact information, the detection accuracy is improved, and the mechanical switch operates even if contact with the outer case occurs. It is possible to prevent a malfunction such as not performing. In addition, stable detection accuracy can be improved without being affected by the fluctuation of the power supply voltage or the load amount as in the conventional method of detecting the degree of fluctuation of the number of rotations when the spinning tub starts rotating.
【００３５】なお、上記の説明では判定部２０ｃによる
しきい値の設定を１種類で説明したが、外箱への接触度
合い、即ち外箱への接触が微々たるものか激しく当たっ
ているものかによる判定を行う場合には複数のしきい値
を設定することにより段階的な接触量検出が可能とな
る。In the above description, the setting of the threshold value by the judging section 20c has been described as one type. However, the degree of contact with the outer box, that is, whether the contact with the outer box is slight or violent is made. In the case where the determination is made by using a plurality of threshold values, the contact amount can be detected stepwise by setting a plurality of threshold values.
【００３６】実施の形態２ 図１１はこの発明の実施の形態２である全自動洗濯機の
脱水機のアンバランス量検出装置を示す外箱接触量検出
手段のブロック図、図１２は定常回転時に異常振動が発
生した時の波形例で、（ａ）はパルス長計測部１８ｂに
よるパルス長波形、（ｂ）は周期成分平滑部２０ｂによ
る移動積分波形である。図において、図１の発明の実施
の形態１と同様の構成は同一符号を付して重複した構成
の説明を省略する。２０ｄは洗濯脱水槽４の回転速度と
所定の基準回転速度とを比較し、回転速度が基準回転速
度未満のときは立ち上がり回転領域と判断して判定部２
０ｃのしきい値を立ち上がり回転領域に対応した値に設
定し、回転速度が基準回転速度以上のときは定常回転領
域と判断して判定部２０ｃのしきい値を定常回転領域に
対応した値に設定する回転速度検定部である。Embodiment 2 FIG. 11 is a block diagram of an outer box contact amount detecting means showing an imbalance amount detecting device of a dehydrator of a fully automatic washing machine according to Embodiment 2 of the present invention, and FIG. In the waveform example when abnormal vibration occurs, (a) is a pulse length waveform by the pulse length measuring unit 18b, and (b) is a moving integral waveform by the periodic component smoothing unit 20b. In the figure, the same components as those in the first embodiment of the invention shown in FIG. 1 are denoted by the same reference numerals, and the description of the duplicated components will be omitted. 20d compares the rotation speed of the washing and dewatering tub 4 with a predetermined reference rotation speed, and when the rotation speed is lower than the reference rotation speed, determines that the region is a rising rotation region and determines the determination unit 2;
When the rotation speed is equal to or higher than the reference rotation speed, the threshold value of 0c is set to a value corresponding to the steady rotation region. This is the rotation speed test unit to be set.
【００３７】この実施の形態２では、実施の形態１の周
期成分平滑部２０ｂにおける処理までは同じであるが、
それ以降の判定部２０ｃまで至る処理が異なる。図１２
の波形例に基づき説明する。定常回転時の異常振動は脱
水負荷を水分が透過しにくい繊維を袋状にして水を入れ
る事により実験的に再現できる。この時のパルス長波形
が図１２（ａ）であり、パルス長約４．３ｍｓ（７７５
ｒｐｍ）程度で回転している洗濯脱水槽４が約１０６回
転回数辺りで急激にパルス長５ｍｓレベルまで変化す
る。この時の外箱への接触度合いは大きく、洗濯機本体
が動き出すレベルの異常振動を発生するが、パルス長の
変化は回転立ち上がりの変化量に比べ、大きな振動量の
割には小さい変化量であることが実験により確認され
た。この理由は定常回転時は高速回転のため回転立ち上
がり時に比べ洗濯脱水槽の回転慣性力が大きいため、同
等の外箱接触量では回転立ち上がり時は大きく変化して
も、定常回転時には小さな変化しか得られないことによ
るものである。The second embodiment is the same as the first embodiment up to the processing in the periodic component smoothing unit 20b.
The subsequent processing up to the determination unit 20c is different. FIG.
A description will be given based on the waveform example. Abnormal vibration during steady rotation can be reproduced experimentally by filling the dehydration load with a bag made of fibers that are not easily permeable to moisture. The pulse length waveform at this time is shown in FIG. 12A, and the pulse length is about 4.3 ms (775
(rpm), the washing / dewatering tub 4 rapidly changes to the level of the pulse length of 5 ms at about 106 rotations. At this time, the degree of contact with the outer box is large, and abnormal vibration at the level at which the main body of the washing machine starts to move is generated.However, the change in pulse length is a small amount of change for the large amount of vibration compared to the change in the start of rotation. It was confirmed by experiment. The reason for this is that the rotational inertia of the washing and dewatering tub is larger than that at the start of rotation because of high speed rotation at the time of steady rotation. It is because it cannot be done.
【００３８】図１２（ｂ）は上記図１２（ａ）のパルス
長波形を減速成分抽出部２０ａにより処理し、さらに周
期成分平滑部２０ｂによって移動積分した処理波形を示
す。この波形からも定常回転時の値１５０程度に対し、
異常時が４００程度と回転立ち上がり時に比べると大き
な変化として捉えることができない。従って、回転速度
検定部２０ｄによって例えば回転速度が６００ｒｐｍ以
上か否かを６００ｒｐｍの基準回転速度と比較し、その
回転速度が６００ｒｐｍ未満であれば立ち上がり回転領
域と判断して判定部２０ｃのしきい値を立ち上がり回転
領域に対応した値である１００に設定し、６００ｒｐｍ
以上であれば定常回転領域と判断して判定部２０ｃのし
きい値を定常回転領域に対応した値である３００に設定
する。FIG. 12 (b) shows a processed waveform obtained by processing the pulse length waveform of FIG. 12 (a) by the deceleration component extraction unit 20a and further moving and integrating by the periodic component smoothing unit 20b. Also from this waveform, for a value of about 150 during steady rotation,
The abnormal time is about 400, which cannot be regarded as a large change as compared with the time when the rotation starts. Therefore, the rotation speed test unit 20d compares, for example, whether or not the rotation speed is 600 rpm or more with a reference rotation speed of 600 rpm. If the rotation speed is less than 600 rpm, the rotation speed is judged to be the rising rotation region and the threshold value of the determination unit 20c is determined. Is set to 100, which is a value corresponding to the rising rotation region, and 600 rpm
If it is above, it is determined that the engine is in the steady rotation region, and the threshold value of the determination unit 20c is set to 300 which is a value corresponding to the steady rotation region.
【００３９】このように、非接触の回転センサ１８ａ
と、受水槽２の外箱１への接触は洗濯機の構成部材を利
用し、こ回転速度に応じた外箱接触信号のしきい値を設
けることにより、安価な構成で安全性、耐久性、組立作
業性の向上を維持しながら脱水工程の全ての回線速度領
域において精度の高いアンバランス量検出が可能とな
る。また、従来の機械式スイッチ１ヵ所から外箱４面を
利用できるため検出精度が向上すると共に、回転数の変
動度合いを検出する方式のように電源電圧の変動や負荷
量に影響されることなく、安定した検出精度の向上を図
ることができる。As described above, the non-contact rotation sensor 18a
The contact between the water receiving tub 2 and the outer box 1 is achieved by using a component of the washing machine and providing a threshold value of the outer box contact signal according to the rotation speed, thereby providing safety and durability with an inexpensive configuration. In addition, it is possible to detect the unbalance amount with high accuracy in all the line speed regions in the dewatering process while maintaining the improvement of the assembling workability. In addition, since the outer casing 4 can be used from one conventional mechanical switch, the detection accuracy is improved, and the power supply voltage is not affected by the fluctuation of the power supply or the load amount unlike the method of detecting the degree of fluctuation of the rotation speed. In addition, stable detection accuracy can be improved.
【００４０】なお、上記の説明では回転速度６００ｒｐ
ｍを境として二つの移動積分しきい値をもって判定した
が、段階的な回転速度を設定してしきい値を二つ以上設
けることも可能であり、更に、回転速度としきい値の関
係を連続的に設定しても良い。また移動積分値によるア
ンバランス量判定をしきい値をもって判定したが、移動
積分値の変化量で判定しても良いし、しきい値と変化量
の組み合わせで判定しても良いことは言うまでもない。In the above description, the rotation speed is 600 rpm
Judgment was made based on two movement integration thresholds at the boundary of m, but it is also possible to set a stepwise rotation speed and provide two or more thresholds. May be set manually. In addition, although the determination of the unbalance amount based on the moving integral value is determined based on the threshold value, it is needless to say that the determination may be based on the changing amount of the moving integral value or on a combination of the threshold value and the changing amount. .
【００４１】[0041]
【発明の効果】以上のようにこの発明の請求項１の脱水
機のアンバランス量検出装置によれば、運転制御手段が
脱水槽を回転駆動するためのモータへ電源供給し、脱水
槽が回転している間に、外箱接触量検出手段は回転速度
検出手段が出力する回転速度信号を受け、脱水槽の回転
による振動で受水槽が外箱内面に接触したときの速度変
動量からその接触量を検出するようにしたので、その回
転速度検出手段は負荷量検出に用いる既設の回転センサ
を用い、外箱内面の四面に接触時の速度減速量によりア
ンバランス量を検出するために、機械式スイッチや特別
の検出センサを用いていないために、装置全体が安価と
なり、安全性、耐久性、組立作業性の向上を図ることが
できるという効果がある。さらに、外箱内面の四面に接
触時の速度減速量という接触情報のみを用いているた
め、従来の回転数の変動度合いを検出する方式のように
電源電圧変動や負荷量に影響されず、検出精度の向上を
図ることができるという効果がある。As described above, according to the apparatus for detecting the amount of unbalance in a dehydrator according to the first aspect of the present invention, the operation control means supplies power to the motor for driving the dehydration tub to rotate, and the dehydration tub rotates. During the operation, the outer box contact amount detecting means receives the rotation speed signal output from the rotation speed detecting means, and determines the contact amount based on the speed fluctuation amount when the water receiving tank comes into contact with the inner surface of the outer box due to the vibration caused by the rotation of the dehydration tank. The rotation speed detecting means uses an existing rotation sensor for detecting the load amount, and detects the unbalance amount based on the speed reduction amount when the four inner surfaces of the outer case are contacted. Since no type switch or special detection sensor is used, the whole device is inexpensive, and there is an effect that safety, durability, and workability in assembly can be improved. Furthermore, since only the contact information of the speed deceleration amount at the time of contact with the four inner surfaces of the outer case is used, the detection is not affected by the power supply voltage fluctuation or the load amount unlike the conventional method of detecting the degree of fluctuation of the rotation speed. There is an effect that the accuracy can be improved.
【００４２】この発明の請求項２の脱水機のアンバラン
ス量検出装置によれば、外箱接触量検出手段の減速成分
抽出手段が回転速度検出手段が検出した回転速度信号の
周期性の速度変動成分から受水槽が外箱内面に接触した
ときの速度減速量のみを抽出し、判定手段が減速成分抽
出手段が抽出した速度減速量を所定のしきい値と比較し
て受水槽の外箱内面との接触量を判定するようにしたの
で、脱水槽の回転に発生する周期性の変動成分を除去し
た後の回転周期よりも高い周期成分である速度減速量に
より判定するために、装置全体のコストを低減し、耐久
性、組立作業性の向上を維持しながら検出精度の向上を
図ることができるという効果がある。According to the apparatus for detecting the amount of unbalance in a dehydrator according to the second aspect of the present invention, the deceleration component extracting means of the outer box contact amount detecting means has the periodic speed fluctuation of the rotation speed signal detected by the rotation speed detecting means. From the components, only the speed reduction amount when the water receiving tank contacts the inner surface of the outer case is extracted, and the judging means compares the speed deceleration amount extracted by the deceleration component extracting means with a predetermined threshold value, and the inner surface of the outer case of the water receiving tank. Since the amount of contact with the dehydration tub is determined, in order to determine the amount of speed deceleration that is a cycle component higher than the rotation cycle after removing the fluctuation component of the periodicity generated in the rotation of the dehydration tub, There is an effect that the detection accuracy can be improved while reducing the cost and maintaining the durability and the workability of assembly.
【００４３】この発明の請求項３の脱水機のアンバラン
ス量検出装置によれば、外箱接触量検出手段の減速成分
抽出手段が回転速度検出手段が検出したパルス状の回転
速度信号の周期性の速度変動成分から受水槽が外箱内面
に接触したときの速度減速量のみを抽出し、周期成分平
滑手段が減速成分抽出手段が抽出した速度減速量を複数
パルス数毎に移動積分して平滑し、判定手段が周期成分
平滑手段が平滑した移動積分減速量を所定のしきい値と
比較して受水槽の外箱内面との接触量を判定するように
したので、判定手段が受水槽の外箱内面との接触量を判
定する際におけるノイズ等による誤動作による誤判定を
防止することができるという効果がある。According to the third aspect of the present invention, the periodicity of the pulse-shaped rotational speed signal detected by the rotational speed detecting means is detected by the deceleration component extracting means of the outer box contact amount detecting means. Only the speed deceleration amount when the water tank contacts the inner surface of the outer box is extracted from the speed fluctuation component, and the periodic component smoothing means moves and integrates the speed deceleration amount extracted by the deceleration component extraction means for each of multiple pulses and smoothes it. Then, the determining means compares the moving integral deceleration amount smoothed by the periodic component smoothing means with a predetermined threshold to determine the amount of contact with the inner surface of the outer case of the water receiving tank. This has the effect of preventing erroneous determination due to malfunction due to noise or the like when determining the amount of contact with the inner surface of the outer box.
【００４４】この発明の請求項４の脱水機のアンバラン
ス量検出装置によれば、外箱接触量検出手段の回転速度
検定手段は回転速度検出手段が検出した回転速度信号か
ら回転速度を演算し、その回転速度と所定の基準回転速
度とを比較し、回転速度が基準回転速度未満のときは立
ち上がり回転領域と判断して判定手段のしきい値を立ち
上がり回転領域に対応した値に設定し、回転速度が基準
回転速度以上のときは定常回転領域と判断して判定手段
のしきい値を定常回転領域に対応した値に設定するよう
にしたので、全ての回転領域において精度の高いアンバ
ランス量を検出することができるという効果がある。According to the apparatus for detecting the amount of unbalance of a dehydrator according to the fourth aspect of the present invention, the rotation speed test means of the outer box contact amount detection means calculates the rotation speed from the rotation speed signal detected by the rotation speed detection means. Comparing the rotation speed with a predetermined reference rotation speed, and when the rotation speed is lower than the reference rotation speed, determines that the rotation speed is a rising rotation region, and sets a threshold value of a determination unit to a value corresponding to the rising rotation region; When the rotation speed is equal to or higher than the reference rotation speed, the rotation speed is determined to be in the steady rotation region, and the threshold value of the determination means is set to a value corresponding to the steady rotation region. Has the effect of being able to detect
【図１】 この発明の実施の形態１である全自動洗濯機
を例とした脱水槽のアンバランス量検出装置を示すブロ
ック図である。FIG. 1 is a block diagram showing an apparatus for detecting an unbalance amount in a dewatering tub as an example of a fully automatic washing machine according to a first embodiment of the present invention.
【図２】 同アンバランス量検出装置の回転センサを示
す斜視図である。FIG. 2 is a perspective view showing a rotation sensor of the unbalance amount detection device.
【図３】 図２の回転センサの回路図である。FIG. 3 is a circuit diagram of the rotation sensor of FIG. 2;
【図４】 図２の回転センサの出力波形図である。4 is an output waveform diagram of the rotation sensor of FIG.
【図５】 同アンバランス量検出装置のパルス長計測部
の計測波形図である。FIG. 5 is a measurement waveform diagram of a pulse length measurement unit of the unbalance amount detection device.
【図６】 洗濯時に使用される負荷量検出手段の計測波
形図である。FIG. 6 is a measurement waveform diagram of a load amount detection unit used at the time of washing.
【図７】 理想状態と異常振動発生時の脱水槽の回転状
態を示す説明図である。FIG. 7 is an explanatory view showing an ideal state and a rotating state of the dehydration tub when abnormal vibration occurs.
【図８】 移動振動発生時に受水槽が外箱に接触する説
明図である。FIG. 8 is an explanatory view in which a water receiving tank comes into contact with an outer case when moving vibration occurs.
【図９】 アンバランス量をパラメータとしたパルス長
計測部の計測波形図である。FIG. 9 is a measurement waveform diagram of a pulse length measurement unit using an unbalance amount as a parameter.
【図１０】 図９を外箱接触量検出手段により加工した
波形成形図である。FIG. 10 is a waveform shaping diagram obtained by processing FIG. 9 by outer case contact amount detecting means.
【図１１】 この発明の実施の形態２である全自動洗濯
機の脱水機のアンバランス量検出装置を示す外箱接触量
検出手段のブロック図である。FIG. 11 is a block diagram of an outer box contact amount detecting means showing an unbalance amount detecting device of a dehydrator of a fully automatic washing machine according to a second embodiment of the present invention.
【図１２】 同アンバランス量検出装置の定常回転時に
異常振動が発生した時の波形図である。FIG. 12 is a waveform diagram when abnormal vibration occurs during steady rotation of the imbalance amount detection device.
１ 外箱、２ 受水槽、４ 洗濯兼脱水槽、１７ 運転
制御手段、１８ 回転速度検出手段、２０ 外箱接触量
検出手段、２０ａ 減速成分抽出部、２０ｂ周期成分平
滑部、２０ｃ 判定部。1 outer box, 2 water receiving tank, 4 washing and dewatering tank, 17 operation control means, 18 rotation speed detecting means, 20 outer box contact amount detecting means, 20a deceleration component extraction section, 20b periodic component smoothing section, 20c determination section.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 萬谷 和彦 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 渡久地 政幸 千葉県船橋市山手一丁目１番１号 日本建 鐵株式会社内 (72)発明者 内田 秀世 千葉県船橋市山手一丁目１番１号 日本建 鐵株式会社内 Ｆターム(参考） 3B155 AA06 BA18 BA23 BB04 CA06 CB06 KA33 LA04 LB18 LB35 LC33 MA01 MA06 MA07 MA08 MA09 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuhiko Manya 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Within Mitsui Electric Co., Ltd. (72) Inventor Masayuki Watakuchi 1-1-1 Yamate, Funabashi-shi, Chiba Japan (72) Inventor Hideyo Uchida 1-1-1 Yamate, Funabashi-shi, Chiba F-term (reference) 3B155 AA06 BA18 BA23 BB04 CA06 CB06 KA33 LA04 LB18 LB35 LC33 MA01 MA06 MA07 MA08 MA09
Claims (4)
と、 受水槽に内装された脱水槽と、 脱水槽を回転駆動するためのモータと、 モータを駆動する運転制御手段と、 脱水槽或いはモータの回転数を検出する回転速度検出手
段と、 回転速度検出手段が出力する回転速度信号を受け、脱水
槽の回転による振動で受水槽が外箱内面に接触したとき
の速度変動量からその接触量を検出する外箱接触量検出
手段とを備えたことを特徴とする脱水機のアンバランス
量検出装置。1. A water receiving tank elastically suspended and supported by an outer box, a dewatering tank provided in the water receiving tank, a motor for rotating and driving the dewatering tank, and operation control means for driving the motor; A rotation speed detecting means for detecting the number of rotations of the dehydration tub or the motor, and a rotation speed signal output from the rotation speed detection means, and an amount of speed fluctuation when the water receiving tank comes into contact with the inner surface of the outer box due to vibration caused by rotation of the dehydration tub. And an outer box contact amount detecting means for detecting the contact amount from the outer box.
出手段が検出した回転速度信号の周期性の速度変動成分
から受水槽が外箱内面に接触したときの速度減速量のみ
を抽出する減速成分抽出手段と、減速成分抽出手段が抽
出した速度減速量を所定のしきい値と比較して受水槽の
外箱内面との接触量を判定する判定手段とからなること
を特徴とする請求項１記載の脱水機のアンバランス量検
出装置。2. The outer case contact amount detecting means extracts only the speed deceleration amount when the water receiving tank contacts the inner surface of the outer case from the periodic speed fluctuation component of the rotation speed signal detected by the rotation speed detecting means. A deceleration component extracting means, and a judging means for comparing the speed deceleration amount extracted by the deceleration component extracting means with a predetermined threshold value to determine a contact amount with the inner surface of the outer case of the water receiving tank. Item 2. An unbalance amount detecting device for a dehydrator according to Item 1.
出手段が検出したパルス状の回転速度信号の周期性の速
度変動成分から受水槽が外箱内面に接触したときの速度
減速量のみを抽出する減速成分抽出手段と、減速成分抽
出手段が抽出した速度減速量を複数パルス数毎に移動積
分して平滑する周期成分平滑手段と、周期成分平滑手段
が平滑した移動積分減速量を所定のしきい値と比較して
受水槽の外箱内面との接触量を判定する判定手段とから
なることを特徴とする請求項１記載の脱水機のアンバラ
ンス量検出装置。3. The outer case contact amount detecting means detects only the speed deceleration amount when the water receiving tank comes into contact with the inner surface of the outer case based on the periodic speed fluctuation component of the pulse-like rotation speed signal detected by the rotation speed detecting means. Deceleration component extracting means for extracting the speed deceleration component, a periodic component smoothing means for moving and integrating the speed deceleration amount extracted by the deceleration component extraction for every plural number of pulses, and a moving integral deceleration amount smoothed by the periodic component smoothing means. 2. An unbalance amount detecting device for a dewatering machine according to claim 1, further comprising: a judging means for judging an amount of contact of the water receiving tank with the inner surface of the outer case by comparing the threshold value with the threshold value.
出手段が検出した回転速度信号から回転速度を演算し、
その回転速度と所定の基準回転速度とを比較し、回転速
度が基準回転速度未満のときは立ち上がり回転領域と判
断して前記判定手段のしきい値を立ち上がり回転領域に
対応した値に設定し、回転速度が基準回転速度以上のと
きは定常回転領域と判断して前記判定手段のしきい値を
定常回転領域に対応した値に設定する回転速度検定手段
を備えたことを特徴とする請求項２又は３のいずれか記
載の脱水機のアンバランス量検出装置。4. The outer box contact amount detection means calculates a rotation speed from a rotation speed signal detected by the rotation speed detection means,
Comparing the rotation speed with a predetermined reference rotation speed, if the rotation speed is less than the reference rotation speed, determine the rising rotation region and set the threshold value of the determination means to a value corresponding to the rising rotation region, 3. A rotation speed verification means for judging a rotation speed equal to or higher than a reference rotation speed to set the threshold value of the determination means to a value corresponding to the steady rotation region when the rotation speed is determined to be in a steady rotation region. 4. The device for detecting an unbalanced amount of a dehydrator according to any one of items 3 and 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11014596A JP2000210495A (en) | 1999-01-22 | 1999-01-22 | Unbalance amount detector for spin dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11014596A JP2000210495A (en) | 1999-01-22 | 1999-01-22 | Unbalance amount detector for spin dryer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000210495A true JP2000210495A (en) | 2000-08-02 |
Family
ID=11865574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11014596A Pending JP2000210495A (en) | 1999-01-22 | 1999-01-22 | Unbalance amount detector for spin dryer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000210495A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6568018B1 (en) * | 2001-03-30 | 2003-05-27 | Standet International Corporation | Washing machine speed sensor |
| JP2007050114A (en) * | 2005-08-18 | 2007-03-01 | Toshiba Corp | Washing machine |
| CN108866930A (en) * | 2017-05-10 | 2018-11-23 | 无锡小天鹅股份有限公司 | The method and apparatus and machine readable storage medium of laundry machine dehydration control |
-
1999
- 1999-01-22 JP JP11014596A patent/JP2000210495A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6568018B1 (en) * | 2001-03-30 | 2003-05-27 | Standet International Corporation | Washing machine speed sensor |
| JP2007050114A (en) * | 2005-08-18 | 2007-03-01 | Toshiba Corp | Washing machine |
| CN108866930A (en) * | 2017-05-10 | 2018-11-23 | 无锡小天鹅股份有限公司 | The method and apparatus and machine readable storage medium of laundry machine dehydration control |
| CN108866930B (en) * | 2017-05-10 | 2022-08-16 | 无锡小天鹅电器有限公司 | Method and apparatus for controlling dehydration of washing machine, and machine-readable storage medium |
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