JPH06170084A - Method and device for grasping state of fully automatic washing machine - Google Patents

Abstract

PURPOSE:To exactly grasp static unbalance and full load, and dynamic unbalance of the fully automatic washing machine. CONSTITUTION:To a supporting part 3 of each hanging part (a spring 2, a supporting part 3, a hanging bar 4) of a washing tank 1, a magnet 5 is attached, and in the washing tank 1, a load sensor provided with a magnetic sensor 6 is formed, a distance between the magnetic sensor 6 and the magnet 5 is inputted to an arithmetic unit 8, and the arithmetic unit 8 calculates supporting load of the supporting part 3 from a spring constant of the spring 2, and analyzes the supporting load for a static state and a dynamic state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully automatic washing machine state grasping method and apparatus.

[0002]

2. Description of the Related Art A fully-automatic washing machine with a tub hanging type has 3 to 4 outer tubs.
The book is suspended from a housing by a spring with a suspension rod, and an inner tank for centrifugal dewatering is provided in an outer tank of the hoisting rod to automatically perform washing to centrifugal dewatering and drying. When measuring the unbalance of the washing tub of such a fully automatic washing machine, (a) there are techniques such as using a displacement meter using sound waves or light as a method of measuring in a stopped state, but these are complicated. There is a problem that requires various signal processing techniques. (B) When measuring so-called violent vibration such as waviness of rotation caused by unbalance in a rotated state, it can be measured by using a displacement or speed or acceleration sensor, but the rotation speed of the washing tub is low. To be
These measurements have not been put to practical use because the vibrations are complicated and it is difficult to analyze with only one axis, and the washing tub is controlled from secondary information such as contact between the washing tub and the casing. Is the reality. (C) Further, the weight of the contents such as the laundry in the tub can be measured by using a strain gauge or the like, but there is a problem of an error due to the inclination of the tub and a mounting position (waterproofing), which is also put into practical use. Not not.

[0003]

SUMMARY OF THE INVENTION The present invention is a method for measuring unbalance in a state where a washing machine is stopped, and measuring violent vibration during rotation, and weighing the total weight of contents in a washing tub. It is an object of the present invention to provide a technique for performing the above with one simple and inexpensive device.

[0004]

According to the present invention, the static supporting force of each hanging support point of a washing tub and a dewatering tub hanging type washing machine is measured to determine the bias and the total weight of the contents in the washing tub. It is a method of grasping the state of a fully automatic washing machine characterized by detecting. In addition to grasping the state in such a static state, the dynamic state is grasped. That is, continuous data of the vibration frequency, the amplitude and the vibration phase of the change in the supporting force during the rotation of each hanging support point of the washing tub of the washing tub and the dehydration tub hanging type washing machine are detected, and these are analyzed, It is a method of grasping the state of a fully automatic washing machine, characterized by determining the vibration state.

The apparatus of the present invention which can suitably carry out the above two methods is a load sensor provided at each suspension support point of a washing tub of a washing tub and a dewatering tub hanging type washing machine, and this load sensor. Is a state grasping device for a fully automatic washing machine, which is equipped with an input device for detecting the measured value of 1 and inputting it to the arithmetic device, and an arithmetic device for analyzing the input and outputting information.

[0006]

In general, a fully automatic washing machine, as shown in FIG.
The washing tub 12 is suspended from the housing 11 via the three to four suspension bars 4. As shown in FIG. 4, the tub side of the lower end of the hanging bar 4 supports the spring 2 in order to mitigate transmission of rotational vibration of the washing tub or vibration at the time of loading laundry to the housing.
It is supported by a damper. That is, by measuring the displacement 17 of the damper with a contact or non-contact sensor, the load on the support portion 3 can be obtained from the spring constant. The unbalance of the washing tub can be determined from the load at each location in a rotation stopped state, that is, a static state, or a rotation state, that is, a dynamic state.

In the static state, the bias of the contents in the washing tub and the total weight can be measured from the supporting force of each suspension supporting point. In the dynamic state, that is, when the inner tub of the washing machine is rotating, continuous data of the frequency, amplitude and vibration phase of the change in the supporting force during the rotation of each hanging support point are detected, and these are Fourier-transformed. Analyze by methods such as analysis and harmonic analysis,
The vibration state can be determined. The above measurement can be realized by an arithmetic unit that detects a measured value of a load sensor provided at each suspension support point and analyzes the measured value.

[0008]

EXAMPLE As shown in FIG. 2, permanent magnets 5 are attached to the tips of the dampers 14 of the washing tub 12 suspended in four places, as shown in FIG. The magnetic sensor 6 is fixed to. Displacement of damper 17 (Fig. 4)
Since the output of the magnetic sensor 6 changes with the change of
This is input to the arithmetic unit 8 via the D converter 7. The arithmetic unit 8 calculates the load of the support point, the bias, the washing tub state, and the like from the output of the magnetic sensor 6 and the spring constant of the spring 2. A block diagram showing an example of these calculations is illustrated in FIG. The supporting loads of supporting points 1 to 4 are F ₁ , F ₂ ,
Assuming that F ₃ and F ₄ , F = F ₁ + F ₂ + F ₃ + F ₄ F ₀ = total load of each fulcrum when the tank is empty K = spring constant of damper Weight of contents m = F−F ₀ unbalance ΔF ₁ = F ₁ −F / 4 ΔF ₂ = F ₂ −F / 4 ΔF ₃ = F ₃ −F / 4 ΔF ₄ = F ₄ −F / 4 be able to.

As described above, in the embodiment, the unbalanced state due to the deviation of the contents 16 in the stopped state and the unbalanced state due to the excessive vibration during the rotation can be measured from the load of the supporting portion. Further, the weight of the contents in the washing tub can be measured from the load of the supporting portion in the stopped state.

[0010]

According to the present invention, conventionally individually measured,
It is possible to measure the unbalance of the contents in the rotation stopped state, violent vibration at the time of rotation, and the weight measurement of the contents in the washing tub by using one type of sensor, which requires a complicated and expensive measuring device. It is now possible to grasp the condition of the washing tub of a fully automatic washing machine.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment.

FIG. 2 is an explanatory diagram of an imbalance of a washing machine.

FIG. 3 is a vertical sectional view of the washing machine.

FIG. 4 is an explanatory view of a hanging portion of the washing machine.

FIG. 5 is a block diagram showing a calculation of a calculation device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Washing tub 2 Spring 3 Support part 4 Suspension bar 5 Magnet 6 Magnetic sensor 7 A / D converter 8 Arithmetic device 9 Output 10 Washing machine 11 Housing 12 Washing tub (outer tub) 13 Inner tub 16 Contents 17 Displacement

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masaki Takatsu 2270 Yokose, Yokose-cho, Chichibu-gun, Saitama Sanryo Materials Co., Ltd. Ceramics Laboratory

Claims (3)

[Claims] 1. A static vertical displacement of a washing tub in the vicinity of each hanging support point of a washing tub and a dewatering tub hanging type washing machine is measured to detect the deviation and the total weight of the contents in the washing tub. A method of grasping the state of a fully automatic washing machine characterized by. 2. Continuous data of vibration frequency, amplitude and vibration phase of a change in supporting force during rotation of each suspension support point of a washing tub of a washing tub and a dehydration tub hanging type washing machine are detected, and these are detected. A method of grasping the state of a fully automatic washing machine, characterized by analyzing and determining the vibration state. 3. A load sensor provided at each suspension support point of a washing tub of a washing tub and a dewatering tub hanging type washing machine, and an input device for detecting a measured value of the load sensor and inputting the measured value to an arithmetic unit. An apparatus for ascertaining the state of a fully automatic washing machine, comprising an arithmetic unit for analyzing the input and outputting information.