JPH07151096A - Fuzzy air blower - Google Patents

Abstract

PURPOSE:To simplify storing working to a memory, and to delicately control air blowing according to a temperature and a distance. CONSTITUTION:A circumferential temperature is detected by a temperature sensor 1, and also the distance up to an object is detected by a distance sensor 2, fuzzy inference is carried out by a fuzzy calculation control means 4 in compliance with the detected temperature and the detected distance, and rotational speed of an air blowing fan 7 is found out according to the circumferential temperature and the distance up to the object so as to control driving of the air blowing fan 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to fans and the like, and relates to a fuzzy blower which executes fuzzy inference to control the rotation of a blower fan.

[0002]

2. Description of the Related Art An air blower, for example, an electric fan, is equipped with a temperature sensor for detecting an indoor temperature, and receives the indoor temperature detected by the temperature sensor to control the rotation speed of a blower fan, that is, a blower motor according to a preset control rule. It is controlled.

However, in controlling the number of rotations of the blower motor based only on the room temperature, it cannot be said that the user is finely controlled. For example, even if the temperature is the same, the user feels completely different depending on whether the distance to the user is short or far.

However, in the above fan, if the room temperature is constant even if the distance is different, the number of rotations of the blower fan is the same, so that the user may feel discomfort. On the other hand, there is a technique of detecting the temperature and distance in the room to drive and control the blower fan. This technique obtains the discomfort as a numerical value from the detected temperature and distance, and drives the blower motor when the discomfort value exceeds a set value.

However, according to this technique, the blower motor is driven simply by feeling uncomfortable, and it is difficult to finely control the drive of the blower motor according to the temperature and the distance. On the other hand, as a technique for finely controlling the drive of a blower motor according to temperature and distance, the number of rotations of a plurality of blower motors, which is determined by each condition of temperature and distance, is stored in a memory in a matrix and detected from this memory. There is a method of selecting the rotation speed of the blower motor according to the temperature and distance.

However, this method requires an enormous amount of memory for the number of revolutions according to temperature and distance, and requires a large capacity memory. Therefore, for example, in the memory of a one-chip microcomputer, most of the area is occupied by the rotation speed.

Further, even if it is intended to store the total number of revolutions in the memory, it is difficult because the amount thereof is huge. On the other hand, if the amount of rotation is reduced, it becomes difficult to obtain the optimum rotation number of the blower motor according to the temperature and the distance.

[0008]

As described above, in order to perform the fine drive control of the blower motor according to the temperature and the distance, the number of revolutions corresponding to the temperature and the distance becomes enormous and a large capacity memory is required. Becomes

On the contrary, if the number of rotations is reduced, it becomes difficult to control the optimum air blowing according to the temperature and the distance. Therefore, an object of the present invention is to provide a fuzzy blower capable of simplifying the storage work in the memory and performing fine blow control according to temperature and distance.

[0010]

According to a first aspect of the present invention, there is provided a blower fan and a drive means for rotating the blower fan.
A temperature sensor that detects the ambient temperature, a distance sensor that measures the distance to the target object, and a fuzzy inference based on the temperature detected by the temperature sensor and the distance detected by the distance sensor are performed to determine the ambient temperature and the distance to the target object. A fuzzy blower which achieves the above object by including a fuzzy arithmetic control means for driving and controlling the drive means by obtaining the number of rotations of the blower fan.

According to a second aspect of the present invention, in a fuzzy blower which controls the rotation of the blower fan and performs a swinging motion to continuously change the blower direction of the blower fan, the driving means for rotating the blower fan and the ambient temperature are controlled. The temperature sensor to detect, the distance sensor to measure the distance to the object, the fuzzy inference is executed by receiving the temperature detected by the temperature sensor and the distance detected by the distance sensor during the swinging motion to the ambient temperature and the object. And a fuzzy arithmetic and control means for controlling the drive of the drive means by changing the rotation speed of the blower fan according to the distance.

[0012]

According to the present invention, the ambient temperature is detected by the temperature sensor, the distance to the object is detected by the distance sensor, and the fuzzy inference is executed by the fuzzy arithmetic control means based on the detected temperature and the detected distance. , The drive speed of the blower fan is controlled by obtaining the rotation speed of the blower fan according to the ambient temperature and the distance to the object.

According to a second aspect of the present invention, the detected temperature of the surroundings and the detected distance to the object are detected during the swing motion of the blower fan, and the fuzzy inference is performed by the fuzzy calculation control means based on the detected temperature and the detected distance. Is executed to change the rotation speed of the blower fan according to the ambient temperature and the distance to the object to drive and control the blower fan.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a fuzzy blower applied to a fan. This fuzzy blower is equipped with a temperature sensor 1 and a distance sensor 2.

Of these, the temperature sensor 1 detects the ambient room temperature and outputs the room temperature detection signal, and is composed of a thermistor. The distance sensor 2 measures the distance to the user and outputs a distance detection signal, and is composed of an infrared sensor. The temperature sensor 1 and the distance sensor 2 are connected to the input processing unit 3.

The input processing unit 3 receives the room temperature detection signal from the temperature sensor 1 to obtain the room temperature t, receives the distance detection signal from the distance sensor 2 to obtain the distance R, and fuzzyly calculates the temperature t and the distance R. It has a function of sending to the control unit 4. The input processing unit 3 is composed of, for example, a microprocessor.

The fuzzy arithmetic control unit 4 controls the temperature t and the distance R.
And a fuzzy variable corresponding to the rotation speed N of the blower motor 5, and receives the temperature t detected by the temperature sensor 1 and the distance R detected by the distance sensor 2 to execute fuzzy inference to perform the rotation speed of the blower motor 5. It has a function of obtaining N.

Specifically, knowledge based on human experience and intuition is stored as control rules and each membership function. FIG. 2 is an example of the control rule.

This control rule indicates the rotation speed N of the blower motor 5 obtained from the temperature t and the distance R. In this case, the temperature t is divided into three (H), medium (M) and low (L), and the distance R is close (S), medium (M) and far (L). It is divided into two.

Therefore, for example, when the temperature is medium (M) and the distance R is short (S) in fine weather in summer morning, the rotation speed N is medium (M).
Becomes

The control rule is expressed by the expressions if to then as follows. if (t is M) and (R is S) then (N is M)… (1) if (t is L) and (R is M) then (N is L)… (2) if (t is M) and (R is L) then (N is M)… (3) if (t is H) and (R is M) then (N is H)… (4) if (t is M) and (R is L) then (N is H) (5) Next, the membership function will be described.

FIG. 3 shows the membership function with respect to the temperature t, which consists of fuzzy variables H, M and L. FIG. 4 shows the membership function for the distance R,
It consists of each fuzzy variable L, M, S.

FIG. 5 shows a membership function with respect to the rotation speed N, which is composed of fuzzy variables H, M and L. 3 to 5, the vertical axis represents grades "0" to "1".
And shows the goodness of fit for each fuzzy variable.

Therefore, the fuzzy arithmetic control unit 4 has a function of executing fuzzy inference and sending the rotation speed N of the blower motor 5 determined by the fuzzy inference to the drive unit 6 as a drive control signal.

The blower motor 5 is an inverter motor, and the blower fan 7 is attached to the motor 5. Next, the operation of the blower configured as described above will be described.

The temperature sensor 1 detects the room temperature and outputs the temperature detection signal. Further, the distance sensor 2 detects the distance to the user and outputs the distance detection signal. The temperature detection signal and the distance detection signal are sent to the input processing unit 3.

The input processing unit 3 receives the room temperature detection signal from the temperature sensor 1 to obtain the room temperature t and the distance detection signal from the distance sensor 2 to obtain the distance R, and fuzzy the temperature t and the distance R. It is sent to the arithmetic control unit 4.

The fuzzy arithmetic control unit 4 receives the temperature t and the distance R and executes fuzzy inference to obtain the rotation speed N of the blower motor 5. Hereinafter, the case of the temperature t (= 28 ° C.) and the distance R (= 1.5 m) from the user will be described as an example.

The fuzzy arithmetic control section 4 uses the fuzzy variables M and L for the temperature t (= 28 ° C.) from the membership function of temperature shown in FIG.
Calculate "0.2".

Further, the fuzzy arithmetic control unit 4 uses the fuzzy variables M and L for the distance R (= 1.5 m) from the membership function of the distance shown in FIG.
"0" is requested.

Next, the fuzzy arithmetic control unit 4 uses the above equation (1)
~ Find all conclusion values of the control rule shown in equation (5). That is, if (t is 0.8) and (R is 1) then {N is 0.8 (M)}… (6) if (t is 0.2) and (R is 1) then {N is 0.2 (L)}… ( 7) if (t is 0.2) and (R is 0) then {N is 0 (L)}… (8) if (t is 0.8) and (R is 0) then {N is 0 (H)}… ( 9) if (t is 0) and (R is 1) then {N is 0 (H)} (10)

In this case, the conclusion value, for example, {N is 0.8 (M)} shown in the equation (6) becomes the shaded portion F shown in the fuzzy set of the rotation speed N in FIG. Next, the fuzzy arithmetic control unit 4 obtains the maximum value (MAX) of each grade for each of the fuzzy variables H, M and L of the rotation speed N.
That is, the maximum grade value is "0.8" for the fuzzy variable M and "0.2" for the fuzzy variable L.
Is. The fuzzy variable H is "0".

Next, the fuzzy arithmetic control unit 4 uses the fuzzy variables M of the rotational speed according to the grades "0.8" and "0.2" of the fuzzy variables, like the fuzzy set of the rotational speed N shown in FIG. L is cut, and the area Sa formed by these fuzzy variables M and L and each cut line is obtained.

Then, the fuzzy arithmetic control section 4 finds the center of gravity G in the area Sa, and finds the number of revolutions Ns corresponding to the position of the center of gravity G. As a result, the fuzzy arithmetic control unit 4 sets the rotation speed Ns as the rotation speed under the condition of the temperature t (= 28 ° C.) and the distance R (= 1.5 m).

Then, the fuzzy arithmetic control section 4 sends this rotation speed Ns to the drive section 6 as a drive control signal. As a result, the blower motor 5 rotates at the rotation speed Ns. Less than,
The fuzzy arithmetic control unit 4 fetches the temperature t and the distance R for each predetermined period and executes the fuzzy suylon to obtain the optimum rotation speed Ns of the blower motor 5 for the temperature t and the distance R.

As described above, in the first embodiment,
Temperature t detected by temperature sensor 1 and distance sensor 2
In response to the detected distance R, the fuzzy arithmetic control unit 4 executes fuzzy inference according to each membership function to obtain the rotation speed Ns of the blower motor 5, so that the conditions of the temperature t and the distance R are met. Optimal rotation speed Ns
Thus, the blower motor 5 can be driven, and a comfortable wind can be constantly supplied to the user regardless of the indoor atmosphere and the distance.

In other words, even at the same temperature, it is possible to send the user a finely changing wind according to the distance. In this case, it is not necessary to store a plurality of rotation speeds with respect to the temperature t and the distance R in a matrix in the memory of the fuzzy operation control unit 4, and the complicated work of storing the rotation speeds in the memory is not required.

Further, even when the matrix is formed, the state of the matrix boundary and the like can be controlled without fail. Next, a second embodiment of the present invention will be described. The same parts as those in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 10 is a block diagram of a fuzzy blower applied to a fan. The blower fan 7 and the blower motor 5 are configured to swing by a swing motor 8.
The swing motor 8 is rotationally driven by the drive unit 9.

Further, the distance sensor 2 is provided integrally with the blower fan 7 and the blower motor 5 so that the measuring direction also swings according to the direction of the swinging motion of the blower fan 7. There is.

Similarly to the above, the fuzzy arithmetic control unit 4 has fuzzy variables for the temperature t, the distance R, and the rotational speed N of the blower motor 5, and the room temperature t detected by the temperature sensor 1 and the distance sensor 2 are used. It has a function of executing the fuzzy reasoning in response to the detected distance R and obtaining the optimum rotation speed Ns of the blower motor 5 according to the room temperature t and the distance R.

Further, the fuzzy arithmetic control section 4 has a function of sending a drive control signal to the drive section 9 to control the swing. Next, the operation of the fuzzy blower configured as described above will be described.

When the temperature sensor 1 detects the room temperature t and the distance sensor 2 measures the distance R to the user, the detected temperature t and the detected distance R are sent to the fuzzy arithmetic control section 4.

The fuzzy arithmetic control unit 4 receives the room temperature t and the distance R and executes fuzzy inference as in the first embodiment, and the optimum rotation speed of the blower motor 5 according to the room temperature t and the distance R. Ns is obtained, and a drive control signal corresponding to this rotation speed Ns is sent to the drive unit 6.

Further, the fuzzy arithmetic control section 4 sends a drive control signal to the drive section 9 to control the swing. Therefore,
As shown in FIG. 11, when users A, B, and C are located around the fuzzy blower at different distances R, the fuzzy arithmetic control unit 4 swings the blower fan 7 and swings the swinging fan 7. During exercise, each distance R with each user A, B, C is measured, and when the blower fan 7 faces the direction of the user A, the rotation speed of the blower fan 7 according to the distance with this user A. Find Ns.

Similarly, during the swinging motion of the blower fan 7, the rotational speed Ns corresponding to the distance between the user B and the user B is obtained during the swinging motion of the blower fan 7, and when the user B faces the user C. The rotation speed Ns corresponding to the distance from the user C is obtained.

As a result, during the swinging motion, the optimum number of rotations N corresponding to the temperature t and the respective distances from the users A, B and C.
At s, the blower fan 7 is rotationally driven, and optimal blower is performed for each user A, B, C.

The present invention is not limited to the above embodiments, and may be modified within the scope of the invention. For example, the temperature sensor 1 and the distance sensor 2 do not have to be configured to use infrared rays, and may be configured to recognize the temperature and distance by voice. For example, the human voice utters “close” or “far”.

Further, the fuzzy variables are not limited to H, M, and L, and may be set in plural, and similarly, the control rules may be set in plural, not limited to H, M, and L. Further, the invention is not limited to the fan, and may be applied to blowers in general.

[0050]

As described above in detail, according to the present invention, it is possible to provide a fuzzy blower capable of simplifying the storage work in the memory and performing fine blow control according to temperature and distance. Further, according to the present invention, it is possible to provide a fuzzy blower capable of finely controlling the air blow according to the ambient temperature and the distance of the user during the swing motion.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of a fuzzy blower according to the present invention.

FIG. 2 is a schematic diagram showing a control rule of the fuzzy blower.

FIG. 3 is a diagram showing a membership function with respect to temperature.

FIG. 4 is a diagram showing a membership function with respect to distance.

FIG. 5 is a diagram showing a membership function with respect to a rotation speed.

FIG. 6 is a diagram showing grades with respect to temperature.

FIG. 7 is a diagram showing grades with respect to distance.

FIG. 8 is a diagram showing an example of a conclusion value.

FIG. 9 is a diagram showing an optimum number of rotations by the center of gravity method.

FIG. 10 is a configuration diagram showing a second embodiment of a fuzzy blower according to the present invention.

FIG. 11 is a diagram showing fuzzy blowing during swinging operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Temperature sensor, 2 ... Distance sensor, 3 ... Input processing part, 4 ... Fuzzy arithmetic control part, 5 ... Blower motor, 6, 9 ... Drive part, 7 ... Blower fan, 8 ... Swing motor.

Claims (2)

[Claims] 1. A blower fan, drive means for driving the blower fan to rotate, a temperature sensor for detecting an ambient temperature, a distance sensor for measuring a distance to an object, a temperature detected by the temperature sensor and the distance. Fuzzy inference control means for executing a fuzzy reasoning in response to a detection distance of a sensor, obtaining a rotation speed of the blower fan according to an ambient temperature and a distance to the object, and drivingly controlling the driving means. A fuzzy blower characterized by that. 2. A fuzzy blower for controlling the rotation of a blower fan and performing a swinging motion to continuously change a blower direction of the blower fan. Driving means for rotating the blower fan, and a temperature for detecting an ambient temperature. A sensor, a distance sensor that measures a distance to an object, and, during the swinging motion, performs fuzzy inference by receiving the temperature detected by the temperature sensor and the distance detected by the distance sensor, to determine the ambient temperature and the object. A fuzzy blower comprising: a fuzzy arithmetic control unit that controls the driving unit by changing the rotation speed of the blower fan according to the distance to the fuzzy fan.