KR890001905Y1 - Fan - Google Patents

Abstract

No content.

Description

Fan speed control circuit

1 is a block diagram according to the present invention.

2 is a detailed circuit diagram of FIG. 1 according to the present invention.

* Explanation of symbols for main parts of the drawings

10: pulse generator 20: water receiver

30: reception wave delay part 40: distance measurement counter part

50: gating circuit 60: amplification determination and holding circuit

The present invention relates to a fan wind speed control circuit, and in particular, by using an ultrasonic sensor circuit, the fan actively measures the distance from the user to control the wind speed of the fan and to determine whether the user is present so that the operation can be turned on / off. It relates to a wind speed control circuit of the fan.

In general, the wind speed control of the fan is controlled by the mechanical operation to determine the fan motor speed according to the operation of the selection key, and the wind speed is controlled for a predetermined time using a timer.

Accordingly, according to the conventional method, the wind speed had to be manually selected and adjusted according to the distance between the fans, and the electric fan was continuously operated when the user left the fan with the fan turned on. Since it is driven by the action, it has been a serious cause of the cost increase rather than providing a special function.

Therefore, an object of the present invention is to provide a fan wind speed control circuit that can automatically adjust the wind speed by measuring the distance between the fan and the user using an ultrasonic circuit.

Another object of the present invention is to provide a fan that can reduce the waste of power since the fan is actively driven according to the presence of the user.

Still another object of the present invention is to provide a circuit which can be prevented from being stopped when an infant or an approaching object is within a predetermined distance while driving a fan.

Therefore, in order to carry out the purpose of the present invention by moving the selection switch to the Auto Mode (Auto Mode), the driving power is supplied to the pulse generator for generating a pulse of a constant frequency, and the pulse generated by the modulation pulse of the pulse generator A transmitter for generating and transmitting ultrasonic waves from the receiver and detecting the signal waves reflected from the object or the user at the receiving unit, and amplifying and outputting the waveforms according to the generated pulse clock of the pulse generator. The receiving wave delay unit delays the received signal by a predetermined time and delays it, and counts a pulse signal from the pulse generation of the pulse generating unit, and stops counting when there is an output signal of the receiving wave delay unit to measure the distance between the fan and the user. To determine the wind speed according to the distance measuring counter unit and the distance measuring output of the distance measuring counter unit. The gating circuit driving the gate and the output of the gating circuit are counted up and down to carry out a wind speed when a carry or borrow is generated, and even if a distance change occurs between the user and the fan for a certain period of time. It is characterized by consisting of a wind speed determination and maintenance circuit that does not give a sudden change of wind speed of the fan.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram according to the present invention, when the use selection switch is moved to the automatic mode, a driving power is supplied to generate a pulse of a constant frequency, and a pulse generator 10 modulates a pulse generated by the pulse generator 10. The ultrasonic wave generated by the sensor and sent out, and the ultrasonic wave transmitted by the transmitter detects the signal wave reflected from the object or the user at the receiver and amplifies and outputs the waveform, and outputs the pulse generator 10 The reception wave delay unit 30 shifts and delays the reception signal of the transmitter / receiver 20 by a predetermined time according to the generation pulse clock, and counts a pulse signal from the pulse generation of the pulse generation unit 10 before the reception wave delay unit ( The wind speed determination is performed according to the distance measuring counter 40 and the distance measuring counter 40 for measuring the distance between the fan and the user by stopping counting when there is an output signal of 30). The gating circuit 50 for driving the gate and the output of the gating circuit 50 are counted up and down so that the wind speed is converted when a carry or baro is generated, even if a change in the distance between the user and the fan occurs. It consists of a wind speed determination and holding circuit 60 which does not give a sudden wind speed change of the fan during the period.

According to the above-described configuration, if an embodiment is described, the general function is possible by leaving the selector switch in a normal state (NOR) when using it as a general electric fan. These pulses are supplied to the respective units and the pulse generator 10 to generate predetermined pulses.

When the generated signal is input to the wave receiver 20, it is modulated and ultrasonic waves are reflected from an object. When the receiver of the wave receiver 20 is input, the waveform is shaped and amplified and input to the reception wave delay unit 30.

On the other hand, since the pulse generated by the pulse generator 10 is input to the clock of the receiving wave delay unit 30 and is inputted and counted as an input pulse of the distance measuring counter 40, the receiving wave delay unit 30 at the receiving wave unit The received signal input from 20 is delayed by a predetermined time shift in accordance with the input clock and input to the distance measuring counter 40. At this time, the input clock counting counted by the distance counter 40 stops and the distance between the fan and the user is measured according to the counted value.

When the measured value is operated to each gate of the gating circuit 50 is output to the output stage 51, the fan is in the stop mode, and the distance measurement signal of the distance measuring counter 40 is output through the output terminal 52 Frequent distance change of the user for a certain time within a predetermined distance because the fan wind speed is adjusted to the output stage 61 to the output stage 61 to adjust the fan wind speed by counting the rising and falling in the determination and holding circuit (60). Even if is generated, the carry or barrow must be counted up and down more than a predetermined time to prevent a sudden wind speed change of the fan.

2 is a detailed circuit diagram of FIG. 1 according to the present invention, in which SW ₁ is a selector switch, VR ₁ is a variable resistor, R ₁ is a resistor, C ₁ -C ₂ is a capacitor, and N ₁ -N ₅ is an inverting gate ( Inverter), OR ₁ -OR ₄ is OR gate, AN ₁ -AN ₃ is AND gate, IC ₁ is pulse generating circuit, IC ₂ is transmitting circuit, IC ₃ is receiving circuit, IC ₄ is shift Resistor, IC ₅ -IC ₈ is the 1-4 counter, SEN is the ultrasonic sensor unit, selector switch (SW ₁ ), pulse generating circuit (IC ₁ ), variable resistor (VR ₁ ), resistor (R ₁ ), capacitor A portion composed of (C ₁ -C ₂ ) corresponds to the pulse generator 10, and a portion composed of the transmitting circuit (IC ₂ ), the receiving circuit (IC ₃ ), and the ultrasonic sensor unit (SEN) is the water transmitting and receiving unit (20). The shift register IC ₄ corresponds to the reception wave delay unit 30, and the inversion gate N ₁ and the first and second counters IC ₅ and IC ₆ correspond to the distance measuring counter 40. ), Oragate (OR ₁ -OR ₃ ), AND gate (AN ₁ -AN ₃₎ ), The part consisting of the inverting gates (N ₂ -N ₅ ) corresponds to the gating circuit 50, and the part consisting of the third and fourth counters (IC ₇ , IC ₈ ) and the ora gate (OR ₄ ) Corresponds to the wind speed determination and holding circuit 60.

Therefore, when one embodiment of the present invention is described in detail based on the above-described configuration, it can be used as a normal fan when the power supply is put in a normal state (NOR) when using as a general fan, and can be used as an automatic function according to the present invention. When the time selector switch SW ₁ is moved from the normal state to the auto state, power is supplied to each part through the line 12, and a pulse of a predetermined frequency is transmitted from the pulse generating circuit IC ₁ to the line 11. Is output via At this time, the generation frequency is determined according to the adjustment of the variable term VR ₁ , and the generation pulse output from the line 11 is clocked by the transmission circuit IC ₂ , the shift register IC ₄ , and the first counter IC ₅ . input to the stage and is counting the counting the carry of the first counter (IC ₅₎ is input to the clock terminal of the second counter (IC _5).

The transmitting circuit IC ₂ receives the generated pulse, modulates about 70KHZ, converts it to 200V _PP through a transformer, and sends it to the water wave sensor (SEN), a piezoelectric ceramic ultrasonic sensor, which radiates ultrasonic waves toward a user or an object. After receiving the reflected wave from the wave sensor (SEN), amplifying and shaping the waveform in the receiving circuit (IC ₃ ), and then amplifying and shaping the waveform in the shift register (IC ₄ ) and then to the shift register (IC ₄ ). If the input is inverted in the line (11) inverting gate when the output in series from the synchronization with the clock pulse inputted through the after-shift the delay line 31 in the (N ₁₎ of the first and second counter (IC _5, IC ₆₎ The receiving signal is input to the input terminal, which is a load terminal.

At this time, counting of the pulses generated by the pulse generating circuit IC ₁ is stopped and the output terminals Q ₁ , Q ₂ , Q ₄ , Q ₈ and Q ' ₁ and Q' of the first and second counters IC ₅ and IC ₆ are stopped. ₂ , Q ' ₄ , Q' ₈ ), and the distance between the fan and the user is measured by outputting the data counted. The first counter (from the output data Q ₁ , Q ₂ , Q ₄ , Q ₈ and Q ' ₁ , Q' ₂ , Q ' ₄ , Q' ₈ ) of the first and second counters IC ₅ and IC ₆ . When the outputs of the outputs Q ₁ and Q ₂ of the IC ₅ ) and the output line 41 of the second counter IC ₆ are both "high", the output of the oragate OR ₁ is "high". As a result, "high" is output to the stop 51, so that the fan is set to the stop mode, that is, the user stops the fan when the distance of the fan is too close (dangerous zone) or too far.

On the other hand, when "high" is output at the outputs Q ₄ and Q ₈ of the first counter IC ₅ and "high" is output at the output Q ' ₁ of the second counter IC ₆ , the oragate ( OR ₂ ) outputs "high". At this time, since the outputs Q ' ₂ , Q' ₄ , Q ' _{8 of} the second counter IC ₆ are "low", the gates N ₁ and N ₃ become high, and the AND gate AN ₁ Outputs "high" and is inverted at the inverting gate N ₅ to be input to the falling count end of the third counter IC ₇ , and then when a down count is generated, a baro is generated to the signal output through the first end 64. By setting the wind speed "1" of the fan.

The output of high is output to the outputs Q ' ₂ and Q' _{4 of} the second counter IC ₆ so that the OR gate OR ₃ becomes high and the output Q of the second counter IC ₆ is output. When 'low' is output at ' ₈ ), the output of the AND gate (AN ₂ ) becomes “high” and is input to the rising count stage of the third counter (IC ₇ ) to carry the rising count of the input to carry the line to the line 62. Is generated and the signal of the AND gate (AN ₂ ) is inverted at the inversion gate (N ₆ ) to be input to the falling count stage of the fourth counter (IC ₈ ), and the counting down is performed to generate a straight line (Borrow) to the line 63. Input to the oragate (OR ₄ ) to adjust the wind speed by selecting the fan wind speed "2" mode at the output of the second stage (65).

Meanwhile, the second counter-and KATE (AN ₃₎ when at the output (Q _'8) of the (IC ₆₎ outputs a "high", and there is generated the carry in line 41 of the second counter (IC _6), "high" Is output. At this time, when the signal is input to the rising count stage of the fourth counter IC ₈ , when the carry is generated and the carry is generated, the fan wind speed “3” is selected from the output of the third stage 66 to adjust the wind speed.

As described above, even if a change in distance occurs at a predetermined distance between the fan and the user, the output of the first and second counters IC ₅ and IC ₆ may change, but the third and fourth counters IC ₇ and IC ₈ are predetermined. Since the wind speed changes only when the carry or barrow occurs due to the time rising and falling counting, the fan keeps the wind speed for a certain time to prevent the sudden change of the wind speed of the fan and to protect it from danger when the child approaches. The wind speed is adjusted accordingly, no cumbersome operation is required, and the electric fan is automatically turned off when there is no user.

Claims (1)

In the fan speed control circuit having a stop, first, second and third stages (51, 64, 65, 66) serving as a fan speed adjusting stage and a pulse generator (10) serving as a predetermined signal generator, the pulse Transmitter / receiver 20, which modulates the generated signal of the generator 10 to generate ultrasonic waves from the sensor to radiate to the object, and amplifies and waveform-forms the signal wave reflected from the object at the receiver, and the generated pulse When there is a signal reflected from the object of the receiving wave delay unit 30 and the receiving wave delay unit 30 to delay the received signal of the transmitting and receiving unit 20 to be delayed by a predetermined time delay, A distance measuring counter 40 for stopping the counting and calculating the distance between the fan and the user from the counted amount, and a gating circuit 50 for driving the gate for determining the wind speed according to the measured value of the distance measuring count; Gating circuit 50 It is composed of wind speed determination and maintenance circuit 60 to prevent the sudden change of the fan even if the distance between the user and the fan is changed. The wind speed control circuit of the fan.