KR100731973B1 - Automatic electric power control apparatus - Google Patents

Abstract

An automatic electric power control apparatus is provided to reduce a manufacturing cost by controlling an operation of a load through a one-shot multivibrator of a low price. A sense detection unit(10) detects a movement of an object according to existence of the object, and outputs an activated detection signal if the object exists. A signal output unit(20) receives the detection signal, and outputs a noise signal having a higher frequency than a normal signal of the detection signal. A time delay unit(30) receives the detection signal, and outputs a delay detection signal by delaying the detection signal for a predetermined time. A first one-shot multi vibrator(40) receives an illumination control signal, the delay detection signal, and a clear signal, and outputs a load lamp control signal and an illumination control input signal which inverts the load lamp control signal if the clear signal is activated and the illumination control signal is inactivated. If the clear signal is activated and the delay detection signal is activated, the first one-shot multi vibrator(40) activates the load lamp control signal. If the clear signal is inactivated, the first one-shot multi vibrator(40) inactivates the load lamp control signal. A second one-shot multi vibrator(50) receives the load lamp control signal and the noise signal. A load driving unit(60) receives the load lamp control signal, and outputs the activated load driving signal if the load lamp control signal is activated. An illumination control unit(80) outputs the inactivated illumination control signal if the illumination of a surrounding space is lower than a reference illumination. If the illumination of the surrounding space is higher than the reference illumination, the illumination control unit(80) outputs the activated illumination control signal. A power supply unit(100) provides AC power to the load. A switching unit(TS) receives the load driving signal, and operates the load by providing the AC power to the load.

Description

Automatic electric power control apparatus

1 is a block diagram of a conventional automatic power control device,

2 is a block diagram of an automatic power control device of the present invention,

3 is a configuration diagram of a sensor detecting unit of FIG. 2;

4 is a configuration diagram of a noise signal output unit of FIG. 2;

5 is a configuration diagram of the illuminance control unit of FIG. 2;

6 is an operational waveform diagram of an amplified signal of the amplified signal output unit, a detection signal of the fluid discriminating unit, and a noise signal of the noise signal output unit according to the present invention;

7 is an operation waveform diagram of the automatic power control device of the present invention of FIG.

8 is an operational waveform diagram of a zero voltage cross switching unit.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic power control device, and in particular, in a public building, apartment, house, etc. to detect a movement of a person or a car in real time, such as a lamp such as a fluorescent lamp or an air conditioner such as a fan, an air conditioner or a fan which is an inductive load. It relates to an automatic power control device for controlling the operation.

In the conventional case, there is an automatic power control device that automatically detects the movement of a person or a car and automatically operates an operation of a load such as a lamp for a predetermined time, and FIG. 1 is a configuration diagram of the conventional automatic power control device.

The conventional automatic power control device of Figure 1 is a patent registration No. 10-0448053 registered on September 1, 2004.

The conventional automatic power control device of Figure 1 detects the heat or movement of the human body according to the presence of the person to detect the presence of the person (1) to output the activated detection signal LS, the external time setting In accordance with the operation of the input switch M1SW, M2SW, SET, the timer 2 for setting the reference time data M1, M2, which is the lighting time holding time of the fluorescent lamp, and the reference time data output from the timer 2 ( The buffer means 3 storing M1 and M2 and the reference time data stored in the buffer means 3 each time the detection signal LS is activated by receiving the detection signal LS which is the output of the detection unit 1. M1, M2, and counting until reset from the reference time data set in synchronization with the clock signal (CK) to activate the detection signal and output the activated fluorescent control signal (LC) until the counted value is reset, Deactivated fluorescent control signal when the counted value is reset A reverse counter 4 that outputs (LC), one terminal having a first resistor R1 connected to the first supply voltage Vcc, an anode and a cathode, and the anode connected to the other terminal of the first resistor R1; The cathode is connected to the fluorescent lamp control signal LC, which is the output of the inverse counter 4, and when the fluorescent lamp control signal LC is activated, the cathode has a photodiode PD, a collector, a base, and an emitter flowing current from the anode to the cathode. The emitter is connected to the first supply voltage (Vcc) and the photocoupler (5) consisting of a phototransistor (PTR) that is turned on when a current flows through the photodiode (PD) and outputs an activated switching control signal (SCO), such as a fluorescent lamp When the switching control signal SCO is activated by receiving the power supply unit 6 and the switching control signal SCO for supplying AC power for lighting, the AC power output from the power supply unit 6 is output to the output terminal OUT. Supply AC power to fluorescent lamps Is turned on, and when the switching control signal SCO is deactivated, the AC power output from the power supply unit 6 is cut off to constitute a triac SW TRIAC.

The conventional automatic power control device uses an AC power source for supplying power, and supplies a digital circuit such as a timer, a buffer means, a storage unit, a counter counter and a photocoupler to convert the DC voltage converted from the AC power source to the DC voltage. Although used as a voltage, noise may be generated due to sparks inside the switch when the power switch for controlling the presence or absence of an AC power supply, for example, when the light switch is turned on or off. The same occurs in the supply voltage of the digital circuit has a problem that the fluorescent lamp malfunctions.

In addition, the conventional automatic power control device has a problem that the detection sensor of the detection unit is malfunctioned by external electromagnetic waves generated from external electronic devices such as mobile phones in the vicinity of the automatic power control device.

In addition, the conventional automatic power control device has a problem that the product is expensive because a microprocessor or a central processing unit is necessary to control the operation of the timer, the buffer means, the storage unit, the counter counter.

In addition, the illuminance control unit 7 of the conventional automatic power control device is an output of the illuminance control unit 7 unconditionally at night when the day / night switch LNSW is turned on or off according to the day / night input control signal. The illuminance control signal NC is activated to control the lighting of the fluorescent lamp load according to the detection signal LS of the sensing unit 1, and in the daytime, the illuminance control when the ambient illuminance is dark by the photoconductive cell CDS. When the signal NC is activated and the ambient light is bright, the illuminance control signal NC is deactivated to turn off the lighting of the load. Therefore, the load is turned on because the ambient light is dark during the day, and the photoconductive cell CDS It is determined that the illuminance is bright and the illuminance control unit 7 has a problem of causing a malfunction to forcibly turn off the load.

In addition, the conventional automatic power control device generates noise when the load is turned off and then turned off. The noise has a problem in that a detection signal LS, which is an output of the sensing unit, is activated to cause a malfunction to turn on the load.

In addition, the conventional automatic power control device when the movement of the object, such as a person, a car or an insect, or the vibration by the wind, the sensing unit outputs the activated detection signal, and the reverse counter is operated to thereby control the operation of the load There is a problem that the load is also operated for vibrations such as insects or wind other than the object desired by the user.

It is an object of the present invention to provide an automatic power control device capable of operating a load normally without being affected by noise generated in an AC power source by an operation of a power switch or the like and external electromagnetic waves generated from an external electronic device.

Another object of the present invention is to eliminate the need for a central processing unit or microprocessor for controlling the load operation, and to control the operation of the load by using a low-cost monostable multivibrator to lower the price of the product and have a competitive price. It is to provide an automatic power control device.

It is still another object of the present invention to provide an automatic power control device which can prevent the occurrence of malfunction due to the lighting of the load by preventing the illuminance control unit from operating while the load is being turned on.

Still another object of the present invention is to provide an automatic power control device capable of preventing a malfunction by forcibly deactivating a load lighting control signal for a predetermined time even when noise is generated when the load is turned off after the load is turned on.

Still another object of the present invention is to provide a zero voltage cross switching unit between a load driver and a triac so that the load drive signal input to the gate of the triac is activated or deactivated at a position where the voltage of the AC power is zero voltage. The purpose of the present invention is to provide an automatic power control device that protects a tri-lock device and minimizes noise by preventing the AC current from flowing rapidly through the load.

Still another object of the present invention is to provide an automatic power control device that reduces the occurrence of malfunction by controlling the operation of the load only on an object desired by the user so that the load is not operated even when vibrations caused by insects or wind are sensed by the sensor detection unit. To provide.

In order to achieve the above object, the automatic power control apparatus of the present invention is an automatic power control apparatus for controlling the operation of a load by detecting the presence or absence of an object in a room, and detecting the movement of the object according to the presence of the object. Sensor detection means for outputting an activated detection signal when an object exists; Noise signal output means for receiving the detection signal and outputting a noise signal having a frequency higher than a normal signal among the detection signals; Time delay means for receiving the detection signal and delaying the detection signal for a predetermined time to output a delay detection signal; Receiving an illuminance control signal, the delay detection signal and a clear signal, when the clear signal is activated and the illuminance control signal is deactivated, the load lighting control signal and the load are activated during the first time constant time from the rising time of the delay detection signal. Outputs an illuminance control input signal inverting a lighting control signal; when the clear signal is activated and the delay detection signal is activated, the load lighting control signal is activated for a first time constant time at the falling time of the illuminance control signal, A first stage stable multivibrator in which the load lighting control signal is inactivated when the clear signal is inactivated; Receiving a load lighting control signal and a noise signal, outputting a clear signal deactivated for a second time constant from a rising time of the noise signal when the load lighting control signal is deactivated, and controlling the load lighting when the noise signal is activated A second single-stable multivibrator inactive at a falling time of the signal during a second time constant time; Load driving means for receiving a load lighting control signal and outputting an activated load driving signal when the load lighting control signal is activated; If the illuminance of the surrounding space is lower than the standard illuminance set by the user, the deactivated illuminance control signal is output.If the load does not operate and the illuminance of the surrounding space is higher than the standard illuminance, the activated illuminance control signal is output. Illuminance control means for outputting the deactivated illuminance control signal when the illuminance of the surrounding space is higher than the reference illuminance and the illuminance control input signal is deactivated; Power supply means for supplying AC power to the load; And switching means for operating the load by supplying an AC power output from the power supply means to the load when the load drive signal is activated by receiving the load drive signal.

The sensor detecting means includes: a sensor for sensing a movement of the object and outputting a fluid detection signal, a filter means for filtering the fluid detection signal to remove a noise signal included in the fluid detection signal, and outputting a filtering signal; An amplified signal output means for amplifying the filtering signal and outputting an amplified signal, and comparing the amplified signal with a first reference voltage and a second reference voltage smaller than the first reference voltage to receive the amplified signal. And a fluid discrimination means for selecting only a fluid detection signal having a large movement of a fluid determined by a user from the fluid detection signals by passing only a signal greater than the first reference voltage or less than a second reference voltage, and outputting a detection signal. It is done.

Hereinafter, with reference to the accompanying drawings will be described in detail the automatic power control apparatus of the present invention.

2 is a block diagram showing an automatic power control device of the present invention.

As shown in FIG. 2, the automatic power control apparatus of the present invention detects a movement of an object according to the presence of the object, and outputs an activated detection signal MS when the object is present, and detects the movement. A noise signal output unit 20 that receives the signal MS and outputs a noise signal NO having a frequency higher than a normal signal among the detection signals MS, and a detection signal MS by receiving the detection signal MS A time delay unit 30 for outputting a delay detection signal DS by delaying the predetermined time, the illumination control signal LXO, the delay detection signal DS and the clear signal CLR, and then receiving a clear signal CLR. Is activated and the illumination control signal LXO is deactivated, the illumination control which inverts the load lighting control signal LC and the load lighting control signal LC, which are activated during the first time constant time from the rising time of the delay detection signal DS. Outputs the input signal (LXI), clear signal (CLR) is activated and delay detection When the signal DS is activated, the load lighting control signal LC is activated for the first time constant time at the falling time of the illuminance control signal LXO, and when the clear signal CLR is deactivated, the load lighting control signal LC is When the load lighting control signal LC is deactivated by receiving the first single-stable multivibrator 40, the load lighting control signal LC, and the noise signal NO that are inactivated, the second signal is increased in the rising time of the noise signal NO. Outputting a clear signal CLR which is deactivated for a time constant time, and when the noise signal NO is activated, the clear signal CLR is deactivated for a second time constant time at the falling time of the load lighting control signal LC. A monolithic multivibrator 50 and a load driver 60 for receiving the load lighting control signal LC and outputting the activated load driving signal LD when the load lighting control signal LC is activated, If the illuminance is low, the deactivated illuminance control signal (LXO) is output. When the lower 90 does not operate and the illumination of the surrounding space is high, the activated illumination control signal LXO is output. When the illumination of the surrounding space is increased by the operation of the load 90, the illumination control input signal LXI is deactivated. Received by the illumination control unit 80 for outputting the illumination control signal (LXO) deactivated by), the power supply unit 100 for supplying AC power (AC) to the load 90 and the load driving signal (LD) When the driving signal LD is activated, the switching unit TS is configured to supply the AC power AC output from the power supply unit 100 to the load 90 to operate the load 90.

3 is a configuration diagram of the sensor detection unit of FIG. 2, as shown in FIG. 3, the sensor detection unit 10 detects a movement of an object and outputs a fluid detection signal M, and a fluid detection unit. A filter 13 for filtering the signal M to remove the noise signal included in the fluid detection signal M to output the filtering signal FM, and amplifying the filtering signal FM to output the amplified signal AS. The amplified signal output unit 15 and the amplified signal AS are received to compare the amplified signal AS with the first reference voltage Va and the second reference voltage Vb smaller than the first reference voltage Va. The fluid detection signal M having a large movement of the fluid determined by the user among the fluid detection signals M by passing only a signal larger than the first reference voltage Va or the second reference voltage Vb is amplified. It consists of a fluid discriminating unit 17 for selecting only the output of the detection signal (MS).

The amplifying signal output unit 15 has an inverting input terminal, a non-inverting input terminal and an output terminal, and a ground voltage Vss is connected to the non-inverting input terminal, and amplifies the voltage difference between the inverting input terminal and the non-inverting input terminal and outputs the amplified signal to the output unit. An amplifier (AMP) for outputting (AS), one terminal connected to the filtering signal (FM), and the other terminal connected in parallel between the input resistor (RI) connected to the non-inverting input terminal and the non-inverting input terminal and the output terminal in parallel. An amplification gain control unit comprising a multi-switch (MSW) for controlling amplification gain of the amplifier AMP by selecting only one of the resistors Ra, Rb, Rc and a plurality of resistors Ra, Rb, Rc 16).

The fluid discrimination unit 17 has a first resistor R1 having one terminal connected to the supply voltage Vcc, the other terminal connected to the first node N1, and having a first reference voltage Va, and one terminal. Is connected to the other terminal of the first resistor (R1), the other terminal is connected to the second node (N2) has a second reference voltage (Vb), and one terminal is connected to the second node ( N3), the other terminal having a third resistor R3 connected to the ground voltage Vss, an inverting input terminal, a non-inverting input terminal, and an output terminal, and comparing the voltages of the non-inverting input terminal with the non-inverting input terminal. When the voltage at the inverting input terminal is greater than the voltage at the inverting input terminal, the first comparing unit CMP1 outputs the activated sensing signal MS, one terminal is connected to the first node N1, and the other terminal is connected to the first comparing unit. A fifth resistor R4 connected to the inverting input terminal of the CMP1, one terminal connected to the second node N2, and a fifth low terminal connected to the non-inverting input terminal of the first comparing means CMP1; Has a terminal R5, an anode terminal and a cathode terminal, the anode terminal is connected to the other terminal of the fourth resistor R4, and the cathode terminal is connected to the first diode D1 and the anode terminal and the cathode terminal connected to the amplification signal AS; It has a stage, the anode terminal is connected to the amplification signal AS, the cathode terminal is composed of a second diode (D2) connected to the other terminal of the fifth resistor (R5).

The fourth resistor R4 includes the first resistor, the second resistor, and the like so that no current flows from the first node N1 to the inverting input terminal of the first comparing means CMP1 when the signal is not input to the amplifying signal AS. The fifth resistor R5 has a resistance value larger than that of the third resistor, and the fifth resistor R5 has the first comparison means CMP1 at the second node N2 when a signal is not input to the amplified signal AS. The resistance value of the first resistor, the second resistor, and the third resistor is relatively higher than the resistance values of the first resistor, the second resistor, and the third resistor so that no current flows to the non-inverting input terminal of.

4 is a configuration diagram of the noise signal output unit of FIG. 2. As shown in FIG. 4, the noise signal output unit 20 receives a detection signal MS to generate a noise frequency that is higher than a normal signal among the detection signals MS. A high pass filter 21 for passing only a signal having a higher frequency, an emitter, a base, and a collector, the base connected to the output signal of the high pass filter 21, the collector connected to a supply voltage, and a base Is a first transistor Q1 for outputting a noise signal NO, and one terminal is connected to the base of the first transistor Q1, and the other terminal is composed of a sixth resistor R6 connected to the ground voltage.

5 is a configuration diagram of the illuminance control unit of FIG. 2. As shown in FIG. 5, the illuminance control unit 80 includes a variable resistor having one terminal connected to a supply voltage Vcc and outputting another terminal illuminance reference voltage Vref. (VR), one terminal is connected to the other terminal of the variable resistor (VR), the other terminal is connected to the seventh resistor (R7) connected to the ground voltage (Vss), one terminal is connected to the ground voltage (Vss), An eighth resistor R8 at which the other terminal outputs the illuminance voltage VL, and one terminal is connected to the illuminance control input signal LXI, and the other terminal is connected to the illuminance voltage VL, thereby providing the illuminance control input signal LXI. ) Is activated, the higher the illuminance of the surrounding space is, the higher the resistance value is, and the illuminance voltage (VL) is decreased. When the illuminance control input signal (LXI) is deactivated, the illuminance voltage (VL) is a light having a ground voltage (Vss). Receives conduction cell (CDS), illuminance voltage (VL) and illuminance reference voltage (Vref) and activates if illuminance voltage (VL) is greater than illuminance reference voltage (Vref). It consists of a second comparing unit (CMP2) which outputs a light intensity control signal (LXO).

The load driver 60 receives the load lighting control signal LC and turns on the second transistor Q2 which is turned on when the load lighting control signal LC is activated, and the current from the anode to the cathode when the second transistor Q2 is turned on. When the current flows through the photodiode (PD) and the photodiode (PD) flowing through it is composed of a photo driver 61 consisting of a photo transistor (PT) for outputting the activated load driving signal (LD).

The switching unit TS has an anode A, a cathode K, and a gate G. When the load driving signal LD input to the gate G is activated, the switching unit TS has a current from the anode A to the cathode K. Consists of a flowing triac (TRIAC).

The automatic power control device further includes a zero voltage cross switching unit 70 between the load driving unit 60 and the switching unit TS so that the load driving signal LD, which is the output of the load driving unit 60, is connected to the AC power source ( It is activated or deactivated at the zero voltage position of AC).

Operation of the present invention automatic power control device according to the above configuration is as follows.

As shown in FIG. 2 and FIG. 3, the sensor detecting unit 10 includes a detecting sensor 11, a filter 13, an amplifying signal output unit 15, and a fluid discriminating unit 17.

The sensor 11 is a sensor for finely detecting the movement of a human body or the movement of an object, and may use a pyroelectric sensor or a microwave motion sensor. Among these sensors, microwave motion sensor can detect fluid even in a wide space using Doppler principle by using X-Band sensor using 10.5㎓ frequency band.

The sensor 11 detects the movement of the object and outputs a fluid detection signal M. Since the fluid detection signal M is a very weak signal and may include a noise signal, the low noise filter 13 and the amplifying signal output unit 15 are used to remove the noise of the fluid detection signal M and the noise is reduced. The filtered signal FM is amplified to output the amplified signal AS.

The amplified signal output unit 15 is composed of an amplifier AMP, an input resistor RI and an amplification gain control unit 16, and the amplification gain control unit 16 includes a plurality of resistors Ra, Rb, It consists of a multi-switch (MSW) for controlling the amplification gain of the amplifier AMP by selecting only one of Rc and a plurality of resistors (Ra, Rb, Rc) to control the gain of the amplifier (AMP). For example, assuming that the magnitude of the resistance value of the plurality of resistors Ra, Rb, and Rc is Ra> Rb> Rc, the voltage gain Av of the amplifier AMP is determined by the plurality of resistors Ra, Rb, and Rc. As the user selects Ra, the resistor with the largest resistance value by multi-switch (MSW), the voltage gain (Av) of the amplifier (AMP) is-Ra / RI. When selecting Rc, the resistor having the smallest resistance value, the voltage gain of the amplifier is the smallest. As such, the user may selectively control the voltage gain of the amplifier AMP when the detection signal S detected by the detection sensor 11 is weak.

Since the sensor 11 detects an object that is to be detected by a user, for example, a human movement or a vehicle movement, the sensor 11 also detects an insect movement or a vibration caused by wind, and outputs a fluid detection signal M. Since the load 90 may be operated by a movement to an object having a small volume as described above, the fluid discriminator 17 may detect a load ( 90) is not operated. That is, as shown in FIG. 6, the amplified signal AS due to human movement or vehicle movement has a large amplitude, and the amplified signal AS due to vibration by wind or the movement of an insect, such as a small volume, has an amplitude. Since it is quite small, the fluid discriminator 17 compares the amplified signal AS, the first reference voltage Va, and the second reference voltage Vb so that the voltage of the amplified signal AS is equal to the first reference voltage Va. If it is between and the second reference voltage (Vb) outputs the deactivated detection signal (MS), otherwise outputs the activated detection signal (MS). Therefore, the fluid discrimination unit 17 can prevent the load 90 from malfunctioning due to movement of an insect, such as a small volume, or vibration by wind.

As shown in FIG. 3, the first and third resistors R1 and R3 of the fluid discriminating unit 17 are 200 kV, the second resistor R2 is 20 kV, and the fourth resistor R4 and Assuming that the fifth resistor R5 is 1 kW, the first node N1 is formed by the first, second and third resistors R1, R2 and R3 connected in series between the supply voltage Vcc and the ground voltage Vss. Since the first reference voltage Va, which is a voltage of N, is about 2,61V, the second reference voltage Vb is about 2.38V, and the fourth resistor R4 and the fifth resistor R5 are 1 kV. Almost no current flows from the first node N1 to the inverting input terminal of the first comparing means CMP1, and almost no current flows from the second node N2 to the non-inverting input terminal of the first comparing means CMP1. Do not. Therefore, the voltage Vc of the inverting input terminal of the first comparing means CMP1 is the same voltage as the first reference voltage Va, and the voltage Vd of the non-inverting input terminal of the first comparing means CMP1 is the second reference voltage. (Vb) has the same voltage. If the voltage of the amplification signal AS is between the first reference voltage Va and the second reference voltage Vb, the first diode D1 and the second diode D2 are turned on so that the first comparison means CMP1. The voltage Vc of the inverting input terminal and the voltage Vd of the non-inverting input terminal of the first comparing means CMP1 are not changed so that the sensing signal MS, which is the output of the first comparing unit CMP, is inactivated. When the voltage of the amplified signal AS is greater than 2.61 V, which is the first reference voltage Va, the first diode D1 is turned off because no current flows from the anode to the cathode, and the second diode D2 is turned on to conduct a first comparison. The voltage Vd of the non-inverting input terminal of the means CMP1 becomes a voltage larger than 2.61 V, which is the voltage of the amplifying signal AS, so that the detection signal MS is activated. As described above, when the voltage of the amplification signal AS is smaller than 2.38 V, which is the second reference voltage Vb, the second diode D2 is turned off because no current flows from the anode to the cathode, and the first diode D1 is turned off. Since the voltage Vc of the inverting input terminal of the first comparing means CMP1 becomes less than 2.38V, which is the voltage of the amplifying signal AS, the sensing signal MS is also activated.

  Therefore, in the automatic power control device of the present invention, even if the sensor 11 detects the movement of small-volume insects, the load 90 is not operated because the detection signal MS is deactivated by the fluid determination unit 17. Only when the movement of the vehicle or the like is detected, the detection signal MS is activated to operate the load 90. Also, the user may change the resistance values of the first resistor R1, the second resistor R2, and the third resistor R3 of the fluid determination unit 17 to activate the detection signal MS only for the movement of the object. It may be.

The automatic power control apparatus of the present invention uses an AC power source (AC) as a supply power source to operate the load 90, and converts it into a DC voltage to an AC power source AC and uses it as a supply voltage of 5V. Therefore, the AC power has a frequency of 1000 kHz or more and a large amplitude may be generated. The noise generated by the AC power is also generated at a supply voltage of 5 V, and the noise is amplified by the amplifier AMP. Amplified through, the fluid discriminator 17 outputs the activated sensing signal MS to the amplified noise signal, which may cause a malfunction of the load 90.

In addition, by the external electromagnetic waves generated by the external electronic devices, the sensor detecting unit 10 may output the activated detection signal MS so that the load 90 may malfunction in the same manner as the noise signal generated by the power supply.

Therefore, as shown in FIG. 4, the noise signal output unit 20 separates a noise signal generated by an external electromagnetic wave and a noise signal generated by an external power source from a detection signal MS output from the sensor detector 10. Output only (NO).

That is, as shown in FIG. 4, the high pass filter 21 has a frequency higher than a normal signal having a frequency of 10 Hz to 100 Hz among the detection signals MS, for example, a frequency higher than a noise frequency of 1000 Hz. Only the signal is allowed to pass, and the noise signal NO is in phase with the output of the high pass filter 21 by the first transistor Q1 and the sixth resistor R6. For example, as shown in FIG. 6, when noise is generated in the T1 and T2 sections, the amplification signal output unit 15 is a motion signal of a normal object for operating the noise and the load 90 in the T1 and T2 sections. The normal detection signal is amplified and output. Since the noise is within the normal detection signal in the T1 section, the fluid discriminator 17 outputs the detection signal MS activated during the normal detection signal by the normal detection signal, and the noise in the T2 section. Since only the liquid determination unit 17 outputs the detection signal MS activated by the noise. The noise signal output unit 20 outputs a noise signal NO that is activated only in the T1 section and the T2 section.

As shown in FIG. 5, when the illuminance of the surrounding space is dark to control the lighting of the load 90, the user sets the reference illuminance by adjusting the resistance value of the variable resistor VR. That is, the reference illuminance is represented by a voltage value of the illuminance reference voltage Vref by the resistance ratio between the variable resistor VR and the seventh resistor R7. When the illuminance control input signal LXI input to the illuminance control unit 80 is activated, the photoconductive cell CDS and the eighth resistor are increased as the illuminance of the surrounding space becomes darker. The illuminance voltage VL outputted by the resistance ratio of R8 has an increasingly small voltage value, and the illuminance voltage VL is smaller than the illuminance reference voltage Vref set by the user. Outputs an inactivated illuminance control signal LXO having a low logic value, and the load lighting control signal LC, which is an output of the first single-stable multivibrator 40 by the inactivated illuminance control signal LXO, is a detection signal. It is activated according to MS to control the lighting of the load 90.

When the ambient light becomes bright, the illuminance voltage VL increases, and when the increased illuminance voltage VL is greater than the illuminance reference voltage Vref, the illuminance control signal LXO is activated to have a high logic value. The load lighting control signal LC, which is the output of the stable multivibrator 40, is deactivated, and the load 90 is not turned on.

When the load lighting control signal LC is activated and the load 90 is turned on, the illuminance control input signal LXI input to the illuminance control unit 80 is inactivated and has a low logic value, so that the illuminance voltage VL is a ground voltage ( Vss), and the illuminance control signal LXO, which is the output of the second comparison unit CMP2, is always deactivated to have a low logic value.

Therefore, the illuminance control unit 80 of the present invention outputs an illuminance control signal LXO that is activated or deactivated by determining the illuminance of the surrounding space by the photoconductive cell CDS before the load 90 is turned on. After the 90 is turned on, the illuminance control signal LXO is always deactivated to have a low logic value, thereby preventing a malfunction in which the load 90 is turned off.

7 is an operation waveform diagram of the automatic power control device of the present invention of FIG.

As shown in FIGS. 2 and 7, the detection signal MS, which is an output of the sensor detection unit 10, is not only the normal signal S that detects the movement of the object in the detection sensor 11, but also noise or external noise of an AC power source. The noise signal N caused by noise caused by electromagnetic waves is also output. As shown in FIG. 7, the detection signal MS outputs only the noise signal N at t1 time and t11 time, and the normal signal (t3 time). Only S) is outputted, and between t6 hours and t10 hours, the normal signal S and the noise signal N are output together, and the illuminance of the surrounding space is darker than the standard illuminance, so that the illuminance control signal LXO is deactivated to produce a low logic value. Assuming the output, the operation of the automatic power control device of the present invention is as follows.

First, as illustrated in FIG. 6, the detection signal MS outputs an activated signal having a high logic value at a time when the noise signal N and the normal signal S exist, and the noise signal output unit 20. The high pass filter 21 outputs only the noise signal NO corresponding to the noise signal N among the detection signals MS. Therefore, the noise signal NO is activated at t1 time, t8 time, t9 time and t11 time, respectively, and has a high logic value. In FIG. 7, the time for which the noise signal NO maintains the high logic value is long, but since the noise signal NO has the high logic value only in the time domain in which the noise signal N exists, The time for NO) to maintain a high logic value is considerably shorter than several orders of magnitude.

The time delay unit 30 outputs a delay detection signal DS which delays the detection signal MS for a predetermined time. That is, the delay detection signal DS may delay the detection signal MS to be activated after the noise signal NO is activated.

The first and second stage stable multivibrators 40 and 50 invert the output signals of the first input terminal AB, the second input terminal B, the output terminal Q, and the output terminal Q, and output the inverted output stage QB. ) And a reset terminal (RB), and if the first input terminal (AB) has a low logic value, the first output terminal (Q) at the rising time of the input signal of the second input terminal (B) is the resistor (Rx) and the capacitor (Cx). Outputs a high logic value for a time constant time by the time constant, and if the second input terminal B is a high logic value, the first output terminal Q has a resistor Rx and a capacitor in the falling signal of the first input terminal AB. Outputs high logic value during time constant time by (Cx). When the low logic value is input to the reset stage RB, the output stage Q is reset to output a low logic value.

The load lighting control signal LC, which is the output of the first single-stable multivibrator 40 input to the first input terminal AB of the second single-stable multivibrator 50 by the above operation, initially has a low logic value. If it is assumed that the noise signal NO input to the first input terminal (AB) of the second stage stable multi-vibrator 50 is a rising time that changes from a low logic value to a high logic value at t1 time, t10 time The inverting output unit QB of the two-stage stable multivibrator 50 outputs a clear signal CLR having a low logic value during the second time constant time TD2 by the resistor Rx2 and the capacitor Cx2, By the clear signal CLR having a low logic value, the load lighting control signal LC, which is an output of the output terminal Q of the first stage stable multivibrator 40, is reset to continue outputting a low logic value. As described above, the time delay unit 30 delays the delay detection signal DS for a predetermined time from the noise signal NO so that the delay detection signal DS has a high logic value at t2 time. Thus, the second single-stable multivibrator 50 is operated before the first single-stable multivibrator 40 so that the clear signal CLR which is the output of the second single-stable multivibrator 50 by the noise signal NO. Has a low logic value, which causes the load lighting control signal LC, which is the output of the first single-stable multivibrator 40, to output a low logic value so that the load 90 does not operate. That is, even if the detection signal MS is activated by noise while the fluorescent lamp, which is the load 90, is turned off by outputting a low logic value in which the load lighting control signal LC is inactivated, the second single-stable multivibrator 50 A low logic value in which the load lighting control signal LC is forcibly deactivated is output by the clear signal CLR which is an output, so that the fluorescent lamp serving as the load 90 is not turned on.

In the related art, when the detection signal MS is activated by noise, a malfunction occurs in which the fluorescent lamp of the load 90 is turned on. However, in the present invention, the noise signal output unit 20 and the second single-stable multivibrator 50 As a result, the load lighting control signal LC was forcibly reset so that the fluorescent lamp was not turned on.

Second time constant time TD2 when the first time constant time TD1 at which the load lighting control signal LC, which is the output of the first single-stable multivibrator 40, maintains a high logic value is set from 30 seconds to 60 seconds. ) Is preferably set to around 1 second.

Since the detection signal MS outputs only the normal signal S at time t3, the second single-stable multivibrator 50 does not operate, and thus the clear signal CLR, which is the output of the second single-stable multivibrator 50, is high. Since the logic value is maintained and the illuminance control signal LXO input to the first input terminal AB of the first stage stable multivibrator 40 continues to output a low logic value when the illuminance of the surrounding space is lower than the reference illuminance, , The load lighting control signal LC, which is the output of the output stage Q of the first stage stable multivibrator 40, is activated at time t4, which is the rising time of the delay detection signal DS, and outputs a high logic value. While maintaining the high logic value for several hours TD1, the low logic value is output at the time t5 when the first time constant time TD1 elapses. As such, since the load lighting control signal LC is activated, the second transistor Q2 of the load driver 60 is turned on so that the photodiode PD of the photo driver 61 is connected to the ground voltage Vss at the supply voltage Vcc. As the current flows through the phototransistor, the phototransistor PT is turned on, and the load driving signal LD is activated to have a high logic value. The switching unit TS composed of triacs is turned on by the load driving signal LD having a high logic value so that the AC power is supplied to the load 90 so that the fluorescent lamp serving as the load 90 is turned on. When the load lighting control signal LC is activated, the illuminance control input signal LXI, which is the output of the inverted output terminal QB of the first single-stable multivibrator 40, is inactivated and has a low logic value, thereby causing the illuminance controller 80 As shown in FIG. 5, the illuminance voltage VL becomes 0 V, so that the illuminance control signal LXO output from the illuminance control unit 80 always has a low logic value. That is, in the related art, when the movement of the object is detected by the sensor 11 and the fluorescent lamp of the load 90 is turned on, the resistance value of the photoconductive cell CDS is decreased to increase the illuminance voltage VL, and the illuminance is increased. The control signal LXO has a high logic value, and the load lighting control signal LC outputs a low logic value so that a malfunction occurs to turn off the fluorescent lamp. However, in the present invention, the low logic value after the fluorescent lamp is turned on. The illuminance control signal LXO is forced to continuously maintain a low logic value by the illuminance control input signal LXI having a luminous effect, so that a malfunction in which the fluorescent lamp is turned off does not occur.

When the ambient light is higher than the standard illuminance, that is, during the daytime, the illumination control signal LXO is activated and outputs a high logic value. In this case, even though the movement of the object is detected, the detection signal MS is activated. Since the first single-stable multivibrator 40 does not operate, the load lighting control signal LC continuously outputs a low logic value, so that the load 90 does not operate.

When the detection signal MS has the noise signal N in the normal signal S, that is, as shown in FIG. 7, the detection signal MS continues to output the normal signal S at the time t6. When the noise signal N is generated at the time t8 during operation, at t7 hours when the delay detection signal DS is activated, the load lighting control signal LC is activated and the fluorescent lamp of the load 90 is turned on. At time t8, the noise signal NO is active, but at time t8 the load lighting control signal LC has a high logic value, so the second single-stable multivibrator 50 does not operate and the clear signal CLR continues to be high. Since it has a logic value, the load lighting control signal LC continues to maintain a high logic value for the first time constant time TD1. That is, even when noise is generated while the load 90 is operating, the load 90 can be prevented from malfunctioning by the noise.

In addition, even if noise is generated when the load is turned off after the load is turned on, the clear signal CLR, which is the output of the second single-stable multivibrator 50, has a low logic value, and the load lighting control signal LC is set for a predetermined time. By forcefully deactivating, the load 90 does not light up. Therefore, it is possible to prevent the load 90 from malfunctioning due to noise.

As shown in FIG. 1, a zero voltage cross switching unit 70 is further provided between the load driving unit 60 and the triac switching unit TS to be applied to the gate of the switching unit TS as shown in FIG. 8. The load driving signal LD is activated or deactivated at the zero voltage positions O1 and O2 of the AC power source AC of the power supply unit 100.

That is, when the triac switching unit TS is turned on or off at a random position of an AC power source having a 60 kHz frequency, the AC current is rapidly turned on or off, and strong noise is generated. The switching unit TS is operated by the load driving signal LD that is activated or deactivated only at the points O1 and O2 where the voltage of the AC power source AC is zero using the switching unit 70. It can prevent the occurrence of noise caused by transient phenomenon.

For example, as shown in FIG. 8, when the load lighting control signal LC is activated at a position other than the zero voltage positions O1 and O2 of the AC power source AC, the phototransistor PT of the load driving unit 60 is turned on. The output signal PTO is also activated or deactivated at positions other than the zero voltage positions O1 and O2 of the AC power source AC in the same manner as the load lighting control signal LC. When the switching unit TS is turned on or off by such a signal, an AC current is rapidly generated to generate strong noise in surrounding electronic circuits. In order to prevent this, the zero voltage cross switching unit 70 activates or deactivates the output signal PTO of the phototransistor PT only at the zero voltage positions O1 and O2 of the AC power source AC. The switching unit TS is turned on or off by such a load driving signal LD to prevent the AC current from flowing rapidly in the load 90 to protect the switching element TS. It is possible to prevent the occurrence of noise due to transient phenomenon.

The automatic power control device of the present invention can operate the load normally without being affected by the noise generated in the AC power supply by the operation of the power switch or the like and the external electromagnetic wave by the external electronic device, and the center for controlling the load operation There is no need to have a processing device or microprocessor, and the low price monostable multivibrator is used to control the operation of the load to make the product price low and to be competitive in price, while the illumination control unit does not operate while the load is on. It is possible to prevent the occurrence of malfunction due to the lighting of the load, and to prevent the occurrence of the malfunction by forcibly deactivating the load lighting control signal for a certain time even if noise occurs when the load is turned off after the load is turned on. Zero voltage cross switching between drive and triac The load driving signal input to the triac's gate is activated or deactivated at the zero voltage position of the AC power supply, thereby preventing the AC current from flowing rapidly to protect the tri-lock device and minimizing noise generation. Even if vibrations caused by insects or wind are sensed by the sensor detection unit, the load is not operated so that the operation of the load is controlled only for an object desired by the user, thereby preventing malfunction.

Claims (10)

In the automatic power control device for controlling the operation of the load by detecting the presence of the object in the room, Sensor detecting means (10) for detecting the movement of the object in accordance with the presence of the object to output an activated detection signal (MS) when the object exists; Noise signal output means (20) for receiving the detection signal (MS) and outputting a noise signal (NO) having a frequency higher than a normal signal among the detection signals (MS); Time delay means (30) for receiving the detection signal (MS) and delaying the detection signal (MS) for a predetermined time to output a delay detection signal (DS); When the illuminance control signal LXO, the delay detection signal DS and the clear signal CLR are received and the clear signal CLR is activated and the illuminance control signal LXO is deactivated, the delay detection signal DS Outputs an illuminance control input signal LXI inverting the load lighting control signal LC and the load lighting control signal LC activated during the first time constant at the rising time of the signal; and the clear signal CLR is activated. When the delay detection signal DS is activated, the load lighting control signal LC is activated for a first time constant time at the falling time of the illuminance control signal LXO, and when the clear signal CLR is deactivated, the load is controlled. The lighting control signal LC is the first single-stable multivibrator 40 is inactivated; When the load lighting control signal LC is deactivated and the load lighting control signal LC is deactivated, the clear signal CLR is deactivated for a second time constant time from the rising time of the noise signal NO. When the noise signal (NO) is activated, the clear signal (CLR) is deactivated for a second time constant time at the falling time of the load light control signal (LC) (2) ; Load driving means (60) for receiving a load lighting control signal (LC) and outputting an activated load driving signal (LD) when the load lighting control signal (LC) is activated; If the ambient illuminance is lower than the standard illuminance set by the user, the deactivated illuminance control signal (LXO) is output.If the load does not operate and the illuminance of the surrounding space is higher than the standard illuminance, the activated illuminance control signal (LXO) is output. Illuminance control means 80 for outputting the deactivated illuminance control signal LXO when the illuminance of the surrounding space is higher than the reference illuminance by the operation of the load and the illuminance control input signal LXI is deactivated; Power supply means for supplying AC power to the load; And And a switching means (TS) for operating the load by supplying the AC power output from the power supply means (100) to the load when the load drive signal is activated by receiving the load drive signal. Power controller. The method of claim 1, wherein the sensor detecting means 10 A detection sensor 11 for detecting a movement of the object and outputting a fluid detection signal M; Filter means (13) for filtering the fluid detection signal (M) to remove a noise signal included in the fluid detection signal (M) to output a filtering signal (FM); An amplified signal output unit 15 for amplifying the filtering signal FM and outputting an amplified signal AS; And The amplified signal AS is compared with the amplified signal AS, and the first reference voltage is compared with a second reference voltage smaller than the first reference voltage, so that the amplified signal AS is greater than or equal to the first reference voltage. Automatic power control characterized in that it comprises a fluid discrimination means 17 for outputting a detection signal by selecting only the fluid detection signal having a large movement of the fluid determined by the user out of the fluid detection signal by passing only a signal smaller than the second reference voltage Device. The amplifying signal output means of claim 2, An amplifier having an inverting input terminal, a non-inverting input terminal and an output terminal, the ground voltage being connected to the non-inverting input terminal, amplifying a voltage difference between the inverting input terminal and the non-inverting input terminal and outputting an amplified signal AS to the output unit; An input resistor having one terminal connected to the filtering signal FM and the other terminal connected to a non-inverting input terminal; Amplification gain control means (16) comprising a multi-switch (MSW) for controlling amplification gain of the amplification part by selecting only one of a plurality of resistors and a plurality of resistors connected in parallel between the non-inverting input terminal and the output terminal; Automatic power control device characterized in that. 3. The fluid discriminating means (17) according to claim 2, wherein the fluid discriminating means (17) A first resistor R1 having one terminal connected to the supply voltage Vcc and the other terminal connected to the first node N1 having a first reference voltage Va; A second resistor R2 having one terminal connected to the other terminal of the first resistor R1 and the other terminal connected to the second node N2 to have a second reference voltage Vb; A third resistor R3 having one terminal connected to the second node N2 and the other terminal connected to the ground voltage Vss; A first comparison unit having an inverting input terminal, a non-inverting input terminal, and an output terminal, and comparing the voltages of the non-inverting input terminal and the non-inverting input terminal to output an activated sensing signal MS when the voltage of the non-inverting input terminal is greater than the voltage of the inverting input terminal. Means (CMP1); A fourth resistor R4 having one terminal connected to the first node N1 and the other terminal connected to the inverting input terminal of the first comparing means CMP1; A fifth resistor R5 having one terminal connected to the second node N2 and the other terminal connected to the non-inverting input terminal of the first comparing means CMP1; A first diode D1 having an anode terminal and a cathode terminal, the anode terminal being connected to the other terminal of the fourth resistor R4, and the cathode terminal being connected to the amplifying signal AS; And An anode end and a cathode end, the anode end being connected to the amplifying signal AS, and the cathode end having a second diode D2 connected to the other terminal of the fifth resistor R5. Power controller. The method of claim 1, wherein the fourth resistor (R4) so that no current flows from the first node (N1) to the inverting input terminal of the first comparison means (CMP1) when no signal is input to the amplified signal (AS). Has a resistance value that is relatively greater than the resistance values of the first resistor, the second resistor, and the third resistor, The fifth resistor R5 may include a first resistor and a first resistor to prevent current from flowing from the second node N2 to the non-inverting input terminal of the first comparison means CMP1 when a signal is not input to the amplification signal AS. An automatic power control device having a resistance value relatively larger than the resistance values of the second resistance and the third resistance. The method of claim 1, wherein the noise signal output means 20 A high pass filter 21 which receives the detection signal MS and passes only a signal having a frequency higher than a noise frequency, which is a frequency higher than a normal signal, of the detection signal MS; A first transistor (Q1) having an emitter, a base, and a collector, a base connected to an output signal of the high pass filter (21), a collector connected to a supply voltage, and a base outputting a noise signal (NO); And And a sixth resistor (R6) having one terminal connected to the base of the first transistor (Q1) and the other terminal connected to the ground voltage. The method of claim 1, wherein the load driving means 60 A second transistor Q2 that is turned on when the load lighting control signal LC is activated by receiving the load lighting control signal LC; And When the second transistor Q2 is turned on, a photodiode PD through which current flows from an anode to a cathode, and a phototransistor PT that outputs an activated load driving signal LD when current flows through the photodiode PD. Automatic power control device characterized in that it comprises a photo driving means (61) consisting of. The method of claim 1, wherein the illuminance control means 80 A variable resistor VR having one terminal connected to the supply voltage Vcc and outputting another terminal illuminance reference voltage Vref; A seventh resistor R7 having one terminal connected to the other terminal of the variable resistor VR and the other terminal connected to the ground voltage Vss; An eighth resistor R8 having one terminal connected to the ground voltage Vss and the other terminal outputting an illuminance voltage VL; When one terminal is connected to the illuminance control input signal (LXI) and the other terminal is connected to the illuminance voltage (VL) and the illuminance control input signal (LXI) is activated, the resistance value increases as the illuminance of the surrounding space becomes dark. Decreases VL, and when the illumination control input signal LXI is deactivated, the illumination voltage VL is a photoconductive cell CDS having a ground voltage Vss; And Second comparison means CMP2 for receiving the illumination voltage VL and the illumination reference voltage Vref and outputting an activated illumination control signal LXO when the illumination voltage VL is greater than the illumination reference voltage Vref. Automatic power control device characterized in that it comprises a. 2. The automatic power control as claimed in claim 1, wherein the switching means (TS) has an anode, a cathode, and a gate, and is a triac in which current flows from the anode to the cathode when the load driving signal LD input to the gate is activated. Device. According to claim 1, wherein the automatic power control device further comprises a zero voltage cross switching means between the load driving means 60 and the switching means (TS) load driving signal (output of the load driving means 60 ( Automatic power control device characterized in that the LD) is activated or deactivated at the zero voltage position of the AC power source.

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