JPH04180723A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To delicately execute control of the input of a motor-driven air blower by converting the kind of the floor surface to an exponent by an output of plural counting means, processing an output of a sensor for detecting the dust by the exponent of the floor surface and the dust quantity, and discriminating automatically the floor surface. CONSTITUTION:Passing of dust 12 is counted by a first counting means 16 by an interruption function. When a unit time elapses, a count value of a first counting means 16 is checked, and when it exceeds a prescribed value, a count value of a second counting means 17 is added by '1', and for instance, when it is >=3, a third counting means 18 is added by '1'. By executing a fuzzy inference from the count value of a first counting means 16 and a floor surface exponent converted to an exponent previously, an optimal input of a motor-driven air blower 2 is determined, and the count value of a first counting means 16 is cleared. In the case of being less than a prescribed value, count values of a second counting means 17 and a third counting means 18 are not added at all but subjected to fuzzy inference, and thereafter, the count value of a first counting means 16 is cleared. When a prescribed time elapses, the floor surface exponent is decided from a second counting means 17 and a third counting means 18.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vacuum cleaner that controls the input (rotation speed) of an electric blower by indexing the type of floor surface to be cleaned and using fuzzy inference together with the amount of dust.

BACKGROUND OF THE INVENTION In recent years, vacuum cleaners are required to automatically control the input of an electric blower to control the suction force depending on the floor surface to be cleaned, the amount of dust, etc. Conventionally, this type of vacuum cleaner
The configuration shown in the figure was common. Below, Part 4'
16 formation will be explained.

As shown in the figure, a vacuum cleaner body (hereinafter referred to as the body) 1 has a built-in electric blower 2, and a suction port 3 has a hose 4.
．． An extension pipe 5 and a suction tool 6 are connected. A hand switch 7 is provided at the tip of the port 4, and by operating the hand switch 7, the rotation speed of the electric blower 2 disposed inside the main body 1 is controlled.

Problems to be Solved by the Invention In such conventional vacuum cleaners, the user determines the floor surface to be cleaned and manually changes the input (rotation speed) by operating the hand switch 7 according to the floor surface. The suction force was changed. Therefore, there was a problem in that the operation was troublesome.

The present invention solves the above-mentioned conventional problems, and automatically identifies the floor surface by processing the output of a sensor that detects dust.
The purpose is to perform fine-grained input control of electric blowers.

Means for Solving the Problems In order to achieve the above object, the present invention includes a sensor for detecting dust passing through a dust passage, a pulse conversion means for converting the output of the sensor into a pulse signal, and a pulse conversion means for converting the output of the sensor into a pulse signal. a first counting means for counting the number of pulses within a unit time; and counting the number of units of time in which the count result of the first counting means becomes a predetermined number of pulses within a predetermined time, and indexing the type of floor surface. and a fuzzy inference device that determines the input to the electric blower, the fuzzy inference device determining the input to the electric blower based on the output of the first counting means and the output of the plurality of counting means. This is the solution to the problem.

Effect of the Invention The present invention uses the above-mentioned problem-solving means to index the type of floor surface using the outputs of a plurality of counting means, and uses the index of the floor surface and the amount of dust to control the input of the electric blower according to the floor surface and the amount of dust. can be used to improve usability.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 3. Incidentally, those having the same configuration as the conventional example are given the same reference numerals and the explanation thereof will be omitted.

As shown in the figure, the sensor 8 is provided with a light emitting diode 10 in the dust passage 9 of the hose 4, and a light receiving part 11 is provided opposite to the light emitting diode 10.
2, the change in the amount of light is detected. The signal from the light receiving section 11 is amplified by an amplification section 13, and is shaped into a pulse signal by a pulse conversion section (pulse conversion means) 14, and converted into a pulse signal.
input to the microcomputer 15. The microcomputer 15 includes a first counting means 16 that counts the number of pulses from the pulse converter 14 within a unit time, and a predetermined number of units in a unit time such that the count result of the first counting means 16 becomes a predetermined number of pulses. A second counting means 17 and a third counting means 18 (!) count within time and index the type of floor surface.
II: It includes a fuzzy inference device 19 that determines the input of the electric blower 2 and a timer part 20. The output of the microcomputer 15 is input to the phase suspension control circuit 2I, which controls the input of the electric blower 2 to control the rotation speed.

The output of the second counting means 17 and the output of the third counting means 18 are generally small on a "flat floor surface" and large on "a carpet surface with a lot of waste hair". Determine the surface index.

The fuzzy inference device 19 uses the index of the floor surface and the first counting means 1.
The input to the electric blower 2 is determined based on the output of The input of the electric blower 2 is determined based on the input inference rule.

Table 2 The operation of the above configuration will be explained with reference to FIGS. 4(a) to ω) to FIG. 7.

As shown in Figure 4 (a) and (b), on a carpet surface with a lot of hair, there is relatively more dust on one side, and moreover, it is continuously sucked in, but on a flat floor surface, as shown in Figure 4. (C) , (
As shown in d), dust exists locally, and most of the dust is removed by one suction, so there is no continuity in dust detection. The first counting means 16 is a pulse converter 1 as shown in FIG. 5(a).
The number of passages of the dust 12 during the unit time of output No. 4 is calculated, and a count value as shown in FIG. 5(b) is obtained. The second counting means 17 and the third counting means 18 count the number of the first counting means 16 when the value of the first counting means 1G is a predetermined value, and perform the steps shown in FIGS. 5(C) and 6(d). − Obtain a count value. In addition, in FIGS. 5(b) to 5(d), specific numerical values of the count values are omitted.

The above operation will be explained with reference to FIG. 6. A series of cycles in the flowchart of FIG. 6 are performed in half cycles of the power supply frequency. Therefore, if the power supply frequency is 60H7, if the timer part 20 of step 1 is counted 12 times, the difference will be 0.1.
Seconds. The passing of the dust 12 is counted by the first counting means 16 using an interrupt function. If the unit time has elapsed in step 2, the count value of the first counting means 16 is checked in step 3, and if the count value is a predetermined value (for example, 2) or more, the count value of the second counting means 17 is increased by 1. , for example, if it is 3 or more, the third counting means 18 is incremented by 1. In step 4, the optimal input for the electric blower 2 is determined by fuzzy inference from the count value of the first counting means 16 and the floor index indexed earlier as described later, and the count value of the first counting means 16 is cleared. . If it is less than a predetermined value, the count values of the second counting means 17 and the third counting means 18 are not processed and the count values of the first counting means 16 are cleared after performing the above-mentioned fuzzy inference. If a predetermined time has elapsed in step 5, the floor index is determined by the second counting means 17 and the third counting means 18 in step 6 as shown in Table 1. and the second
The count values of the counting means 17 and the third counting means 18 are cleared to complete the series of processing. In this way, the output of the sensor 8 automatically identifies the floor surface on which the operation is being performed, and controls the input of the electric blower 2 according to the floor surface.
For a carpet surface J) with a lot of hair, the input can be controlled to be large so that dust can be sucked more quickly. In this way, by identifying the floor surface and detecting the amount of dust, control of the shaded area (intermediate value) in FIG. 7 can be performed, and detailed and smooth input control can be performed. In this way, the electric blower can be controlled according to the floor surface by detecting dust without manual operation, and usability can be improved.

Effects of the Invention As is clear from the above embodiments, according to the present invention, the fuzzy inference device that determines the input of the electric blower uses the output of the first counting means and the plurality of counting means that index the type of floor surface. Since the input of the electric blower is determined by the output, the floor surface to be cleaned can be identified without manual operation, and the input of the electric blower can be automatically controlled according to the floor surface to be cleaned and the dust. If there are many "Kuroho surface", the input is controlled to be large,
(Dust can be sucked out more quickly, and usability can be improved.)

[Brief explanation of drawings]

Fig. 1 is a block circuit diagram of a vacuum cleaner according to an embodiment of the present invention, Fig. 2 is a sectional view of a sensor of the vacuum cleaner, and Fig. 3 (
a) and (b) are diagrams showing the membership functions of the fuzzy inference machine of the vacuum cleaner, Figures 4 (a) to (d) are characteristic diagrams of the vacuum cleaner when detecting dust, and Figure 5 ( a) ~ (d
) is a time chart of the main parts of the vacuum cleaner, Fig. 6 is a flowchart of the main parts of the vacuum cleaner, Fig. 7 is a characteristic diagram of the operating status of the vacuum cleaner, and Fig. 8 is a diagram of the conventional vacuum cleaner. FIG. 2...Electric blower, 8...Sensor, 9
...Dust passage, 12...Dust, 14.
...Pulse conversion section (pulse conversion means), 16...
...First counting means, 17...-9=Second counting means, 18...Third counting means, ]9.
...Fuzzy reasoner. Name of agent: Patent attorney Haruaki Ogata Two idiots (Cd-) Time

Claims (1)

[Claims] a sensor for detecting dust passing through a dust passage; a pulse conversion means for converting the output of the sensor into a pulse signal; a first counting means for counting the number of pulses from the pulse conversion means within a unit time; a plurality of counting means for counting the number of units of time in which the count result of the counting means becomes a predetermined number of pulses within a predetermined time and indexing the type of floor surface;
Equipped with a fuzzy reasoner that determines the input of the electric blower,
In the vacuum cleaner, the fuzzy inference device determines the input to the electric blower based on the output of the first counting means and the outputs of a plurality of counting means.