KR20030038323A - Control circuits of pyroelectric sensor bulb - Google Patents

Abstract

PURPOSE: A lighting control circuit is provided to be capable of controlling the lighting of a sensor lamp without an abnormal operation by judging an entrance of a person and whether or not of noise using an artificial intelligence. CONSTITUTION: A superconduction-type body sensor senses an access of the body through thermal tracking. A high frequency noise eliminating part(32) eliminates an unnecessary component included in a sense signal of the body sensor. The first amplification part(34) inversely amplifies an output of the high frequency noise eliminating part(32). The second amplification part(38) amplifies an output signal of the first amplification part using a reference voltage of a reference voltage generating part. A microcomputer outputs a control signal for driving a bulb according to control values of a CDS sensibility adjusting part and a set timing adjusting part when a sense signal is received from the second amplification part. An output part receives an output of the microcomputer through a photocoupler and switches a power for controlling the bulb.

Description

Control circuit lighting of control lamps {Control circuits of pyroelectric sensor bulb}

The present invention relates to an automatic lighting circuit such as a sensor installed in the entrance and the entrance to detect the presence or absence of a person by a superconducting sensor having a heat tracking function and to drive a bulb for ambient lighting. After a certain time elapses, the sensor lamp is automatically turned off, and the sensor lamp lighting control circuit is designed by applying artificial intelligence to the lighting control circuit to prevent a phenomenon of human detection error.

As is well known, automatic entrances such as apartments or buildings are provided with automatic sensors that mainly turn on only when a person enters and exits for power saving lighting and remain off.

Such a sensor uses a superconducting sensor that senses the heat of the human body and detects the presence or absence of a person with it.

In the conventional lighting circuit of the sensor lamp, when a person enters the monitoring area of the sensor from a human body sensor installed in a specific area, the human body signal is sent to the controller at that moment, and the controller changes the detection signal. It determines that an occupant enters the monitoring area and controls the bulb on for a predetermined time.

However, there is no problem in the case that the person completes the entry or finishes the operation within the on-driving time of the bulb by the controller such as an automatic sensor, but the waiting time of the person is still waiting at the entrance, that is, the entrance. If the time set by the controller such as the sensor is exceeded, the sensor turns off automatically.

This is because a controller such as a sensor reads only the change value from the human body sensor and controls the bulb according to its logic value. Will be turned off.

Therefore, if the sensor is turned off while waiting for the entrance to be completed, the sensor or the like stirs its own arm or moves the body to restart the sensor. The sensors for the entrance lighting had to be reactivated.

An object of the present invention is to precisely control the lighting of the sensor without malfunction by precisely discriminating the entrance and entry standby state and noise of the person by processing the sensing signal of the human body sensor installed in the entrance and entrance with artificial intelligence. It is to provide a control lamp lighting sensor.

1 is a configuration diagram of a sensor lamp lighting control circuit of the present invention.

2 is a block diagram of a human body detection signal output circuit applied to the lighting control circuit of the present invention.

3A to 3I are control flowcharts for each step for explaining the microcomputer control program in the control circuit of the present invention.

※ Explanation of symbols about main part of drawing ※

DESCRIPTION OF SYMBOLS 10 Input power connector 12 Circuit voltage generation part 14 and 16 Input filter part 18 Zero crossing part 20 CDS sensitivity control part 22 Set timing control part

24: human body detection state display unit 26: output unit 28: bulb connector 30: power supply noise removing unit 32: high frequency noise removing unit 34: primary amplifier

36: reference voltage generator 38: secondary amplifier U1: zero crossing IC U2: constant voltage IC U3: amplification IC U4: microcomputer

Q1: Triac Q2: Drive Transistor Q3: Human Body Sensor PC1: Photocoupler

The sensor lamp lighting control circuit of the present invention for achieving the above object is a superconducting human body sensor for detecting the approach of the human body through heat tracking, and a high frequency for removing unnecessary signal components included in the detection signal of the human body sensor A noise canceller, a primary amplifier for non-inverting and amplifying the output of the high frequency noise canceller, a reference voltage generator for generating reference voltages for positive and negative waveforms, and a human body detection signal amplification output for the primary amplifier. The control signal for the bulb driving according to the control value of the zero crossing unit, the CDS sensitivity control unit and the set timing control unit receives the secondary amplifier which amplifies the reference voltage generator and the sensing output of the secondary amplifier. And an output unit for switching the bulb control power by receiving the output microcomputer and the output of the microcomputer through the photocoupler.

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

1 is a configuration diagram of a lighting control circuit of a sensor lamp according to the present invention.

As shown here, the sensor signal input terminal of the microcomputer U4 for processing and outputting a control signal for controlling the lighting of the sensor according to a given lighting condition of the sensor is composed of resistors R3 and R4 and a capacitor C7, respectively. The sensing signal of the human body sensor is input through the first input filter unit 14, the second input filter unit 16 including the resistors R1 and R2 and the capacitor C1.

The zero crossing input terminal of the microcomputer U4 has a zero crossing IC (U1), a capacitor (C52, C59), a resistor (R58), a diode (D2), and a zero crossing IC (U1) for reset control when the lighting operation is completed and the lighting operation is completed. The unit 18 is connected.

The oscillator X1 is connected to the SOC1 and OSC2 terminals of the microcomputer U4. In addition, the microcomputer is composed of a CDS sensitivity control unit 20 and a variable resistor (R12) consisting of resistance (R7, R11) and the illumination sensor (CDS) for sensitivity control according to ambient brightness or sensitivity adjustment for day and night. The set timing control unit 22 is connected to the human body sensing state display unit 24 including the LED (LED1) and the resistor (R64) which are flashed and flashed at a predetermined time interval (0.5 seconds) when the human body detecting signal is held. .

The output terminal of the microcomputer U4 is dualized, and one of the output terminals includes a drive transistor Q2, a photocoupler PC1, a triac Q1, and a resistor R39, R40, R54, and R56. (26) are connected, and the input power connector 10 to which an AC voltage of 220V is applied and the bulb connector 28 to which the bulb is connected are connected in series at both ends of the triac Q1 of this output part.

In view of the organic coupling relationship between the output unit 26, a photocoupler for receiving the control output of the microcomputer U4 and connecting the drive transistor Q2 to be turned on, and generating an input / output separation control output by the drive transistor. PC1) is turned on, and the triac Q1 is switched on by the control output of the photocoupler to apply power to the bulb.

On the other hand, the microcomputer has another output terminal in addition to the output terminal for the output unit 26 above. The other output stage is a relay output stage, in which a relay is installed instead of the above photocoupler and triac so that the power supply of the bulb or other circuit can be switched to the relay contact.

AC input voltage through the input power connector 10 is a constant voltage IC (U2), capacitors (C51, C53, C55, C56, C57, C58), resistors (R53, R56), diodes (D2), zener diodes (D1). ) Is applied to the circuit voltage generation unit 12 constituted by the coil L1, and is connected such that the generated circuit voltage Vcc is applied to each part.

2 is a block diagram of a human body detection signal output circuit for processing the human body detection signal of the sensor lamp lighting circuit to minimize the possibility of malfunction due to the influx of noise.

As referred to herein, the Vcc power supply voltage applied to the human body sensor Q3 includes a power supply noise removing unit 30 including a condenser C19, C21, C26, C32, a coil L3, and a resistor R27, R37. ) To be applied.

The human body detection signal output from the output terminal by the operation of the human body sensor (Q3) is a high-frequency noise removing unit 32 of the low pass function consisting of capacitors (C34, C37, C38) resistors (R36, R38, R39, R40) Connect to be input to the primary amplifier 34 through the ().

The primary amplifier 34 is configured by connecting a non-inverting amplifier IC (U3A), resistors (R29, R34, R35) and capacitors (C28, C29, C43).

The output of the primary amplifier 34 is applied to the secondary amplifier 38 through a DC blocking coupling capacitor C35, where the amplified signal of the final human body sensor detection signal is output.

The secondary amplifier 38 is configured by connecting an inverted amplifier IC (U3B), a capacitor (C41), and a resistor (R41, R42). In addition, the non-inverting input terminal of the amplifying IC (U3B) is a reference voltage generator comprising a capacitor (C33, C39, C42) and resistors (R43, R44) for generating a + level reference voltage and a -side reference voltage of a predetermined level ( 36).

Referring to the operation of the present invention configured as described above are as follows.

First, when a voltage of AC220V is applied to the input power connector 10, the voltage goes down to 12V while passing through the resistors R53 and R56 of the circuit voltage generator 12, the capacitor C51, and the zener diode D1.

The input voltage down to 12V is rectified to DC voltage through rectifying diode (D2), smoothing capacitor (C53, C55, C56) and ripple cancellation coil (L1), and then Vcc by constant voltage IC (U2). It is generated as a voltage and provided as an operating voltage in each circuit part.

In addition, the Vcc voltage is removed by the condensers C19, C21, C26, C32, coil L3 and resistors R27, R37 of the power supply noise removing unit 30 to remove noise contained in the power supply voltage. Is applied.

The human body sensor Q3 detects such a temperature change and causes a current change when a non-uniform temperature layer is formed around the human body as it approaches or more sensitively changes the surrounding temperature due to human breathing.

The weak current signal sensed by the human body sensor Q3 is subjected to a high frequency noise removing unit 32 having a low pass function composed of capacitors C34, C37, and C38 resistors R36, R38, R39, and R40. The noise of the band is removed and input to the primary amplifier 34.

The human body sensing signal input to the primary amplifier 34 is non-inverted and amplified by the ratio of the resistors R29 and R34 in the amplification IC U3A, which is a non-inverting op amp.

The output signal of the primary amplifier 34 is applied to the secondary amplifier 38 after the DC component is cut off through the DC blocking coupling capacitor C35, where the amplified signal of the final human sensor detection signal is obtained. Configures the output to be

The secondary amplifier 38 amplifies the input human sense primary amplification signal based on the non-inverting terminal voltage at the ratio of the resistors R41 and R42 in the inverting amplifier IC U3B. In the non-inverting input terminal of U3B), the reference voltage and (-) component of the positive component generated by the reference voltage generator 36 of the time constant circuit by the capacitors C33, C39 and C42 and the resistors R43 and R44 Since the reference voltage of (± 1.94V in this embodiment) is applied in the form of a pulse waveform, the human amplifier signal of the pulse waveform whose signal magnitude is amplified is output from the secondary amplifier.

The human body sense amplification signal of the secondary amplifier 38 is composed of the first input filter unit 14 composed of the resistors R3 and R4 and the capacitor C7, the resistors R1 and R2 and the capacitor C1, respectively. It is input to the A / D converter in the microcomputer U4 via the second input filter unit 16. Here, the signal input to the second input filter unit 16 is another human body sensing signal generated by another human body sensing circuit, and the circuit configuration thereof may be regarded as the same as that of FIG.

The microcomputer U4 includes a zero crossing unit 18 including a zero crossing IC U1, a capacitor C52 and C59, a resistor R58, and a diode D2 for a zero closing operation at the time of operation and completion of operation. Is applied a zero crossing value.

Also, the oscillator X1 connected to the SOC1 and OSC2 terminals of the microcomputer U4 provides an operating clock of the microcomputer.

In addition, the CDS sensitivity control unit 20 composed of resistors (R7, R11) and the illumination sensor (CDS) is a microcomputer (U4) to enable sensitivity adjustment according to the brightness of the surrounding environment, such as sensor or day and night. It supports the change of the operation setting reference value of the human body sensor.

In addition, the set timing adjusting unit 22 configured with the variable resistor R12 has a basic setting time (for example, 10 seconds, 20 seconds, 30 seconds, 60 seconds, 120 seconds, etc.) for driving the bulb by the microcomputer. Delete the value change.

The LED (LED1) of the human body detection state display unit 24 flashes by refreshing at a predetermined time interval (0.5 seconds) when the human body detection signal is maintained. do.

On the other hand, when the human body monitoring signal input by the human body sensor is processed, the control output for bulb driving appears at the output terminal of the microcomputer (U4), the signal is output to the drive transistor (R56) through the resistor (R56) of the output unit (26). Since it is applied to Q2) to turn on this transistor Q2, the photodiode of photocoupler PC1 is operated, and the output terminal of this photocoupler is short-circuited.

The short circuit of the output terminal of the photocoupler PC1 is connected to the bulb connector 28 because the triac is turned on, since the input voltage of AC220V gates the gate of the triac Q1 through the resistor R40. AC220V operating voltage is applied.

Accordingly, when a human body detection signal is generated by the human body sensor, the sensor lamp, that is, the bulb is turned on in accordance with the set reference value of the microcomputer.

The microcomputer U4 has another output terminal.

The other output stage is a relay output stage, in which a relay can be installed instead of the above photocoupler and triac to switch the power supply of the bulb or other circuit to the contacts of the relay.

FIG. 3A to FIG. 3I are control flowcharts for each step for explaining the microcomputer control program in the control circuit of the present invention, and FIG. 3A shows an A / D converting routine in the microcomputer.

As referred to herein, after the RAM clear routine port initialization step, the reference timer is set to 1 ms, the port refresh routine is performed, and then a preheat flag is determined.

If the preheat flag is not in the above state, it is determined whether 30 seconds have elapsed with the start of blinking of the LED (LED1) at a predetermined time (for example, 0.5 seconds). At this time, if it is within the set time (30 seconds), it returns to the first time. If 30 seconds elapses, the timer is set with the timer cleared and the standby mode for sensing signal read is entered.

If the preheat flag set is checked as a result of the preheat flag set state, the CDS value is read to determine whether the preheat flag set is greater than or equal to the reference value (for example, 1V). If 1V is discrete, the flag in the dark condition is cleared.

Then, the timer variable resistance value is read from the register, for example, 15 seconds if the value is 30 or less, 30 seconds if the value is 60 or less, 2 seconds if the value is 45 seconds or more--240 or less, and the sensor signal is input. Enters the standby mode.

FIG. 3B is a flow chart of the sensor signal read routine following the routine of FIG. 3A.

In this example, the sensor value of channel 1 is read to determine whether the AD register value is 77 or less (2.5V or less) .If it is less than this, set the (-) phase flag and if it is higher, set the (+) phase flag. The flow of performing the first, second, third and fourth sensing subroutines is shown.

FIG. 3C is a flow chart of the signal processing routine of the first sensing step of FIG. 3B. If a signal of more than the reference voltage is input in the first step, it is checked whether it is 90 ms or more, and if it is more than that, the next step is performed to the polarity of the phase. Accordingly, the phase flag of the corresponding polarity (+ or-) is set. However, if no signal above the reference voltage is input, all previous flags are cleared.

FIG. 3D is a flowchart of the second-stage sensing signal processing routine of FIG. 3B. In the second sensing process, it is determined whether a phase flag of (+) or (-) is set, and if there is no phase set value, all flags are cleared. If the flag is set, it is determined whether there is a signal input above the reference voltage. As a result, if there is a signal input, the timer is increased to determine whether it is 2.4 seconds or more, and if it is longer, all flags are set and the operation is switched to the lighting operation routine.

However, in the above process of judging whether the input signal of the reference voltage abnormal signal is higher than the signal input condition of the reference voltage or higher, it is determined whether it is 2.4 seconds or more. Switch to At this time, if more than 2.4 seconds, all flags are cleared.

Figure 3e is a flow chart of the third step of the sensing process, it is determined whether the reference signal time (blank time) is within 50-600ms, if within the set the flag of the next step, otherwise clear all flags to the lighting operation routine Switch.

Figure 3f is a flow chart of the fourth step sensing process, first determine whether it is 90ms to 2400ms, clear all the flags when the setting range is exceeded, set the LED operation flag and clear all the relevant flags if within the range, then the lighting state Switch to the check routine.

3G is a flowchart of an illumination state check routine according to bulb driving.

In this case, it is determined whether the lighting is in operation, and when the lighting is in operation or the illuminance is higher than the standard, the control unit enters the lighting operation routine.

Fig. 3H is a flow chart illustrating the lighting operation routine. First, when the detection completion flag is set, the triac or relay is turned on, the setting timer (reference 15 seconds) is started, and the setting value of the time setting variable resistance value is compared.

When the time value is reached, the triac or relay is turned off, the operation completion flag is cleared, and the sensing LED driving routine is executed.

3I is a flow chart illustrating a sense LED driving routine.

Here, if there is a set of LED flags, turn on the red LED and check for 3 seconds. If the check result is 3 seconds elapsed, the LED flag is cleared and the timer is cleared. Then, the LED is turned off and returns to the initial human body detection signal input monitoring mode.

Accordingly, when the bulb is turned on by the human body detection signal, if any temperature change is detected within the minimum setting time (30 seconds, which is variable by the setting timer), the timing is re-established by the set time at the time of detection, thereby extending the bulb on time. The phenomenon that the sensor lights off after a certain time is prevented.

In particular, the present invention solves the malfunction problem in the existing products by ignoring the human body detection signal for waveforms that do not fall within 90ms-2400ms by the detection algorithm, and the human body detection signal is positive and negative phase pulses. Waveforms can be precisely and software-processed for each pulse width and phase-to-phase gradient to avoid high sensitivity and noise effects.

The present invention as described above can not only detect the minute movement or breath of the human body, but also the human body sensing operation is made exactly even if the human body does not move in the monitoring area for a long time by the artificial intelligence, a certain time after the human body sensing operation Afterwards, the product has a distinctive effect from existing products that did not operate normally. Also, the cost of the product can be lowered by processing the software without adding hardware to important parts. .

In addition, the present invention by blocking the inflow of noise and noise around the sensor at the source source has the effect of improving the reliability of the operation of the sensor.

Claims (3)

Superconducting human body sensor (Q3) for detecting the approach of the human body through heat tracking; A high frequency noise removing unit 32 for removing an unnecessary signal component included in a detection signal of the human body detecting sensor; A primary amplifier 34 for non-inverting and amplifying the output of the high frequency noise removing unit; A reference voltage generator 36 generating a reference voltage of positive and negative waveforms; A second amplifier 38 amplifying the human body sensing signal amplification output of the primary amplifier by the reference voltage of the reference voltage generator; Microcomputer (U4) and the output of the microcomputer to process and output the control signal for bulb driving according to the control value of the CDS sensitivity control unit 20 and the set timing control unit 22 when the sensing output is input from the secondary amplifier The sensor lamp lighting control circuit comprising an output unit (26) for switching the bulb control power is received through the photocoupler. The output unit 26 is a drive transistor (Q2) that receives the control output of the microcomputer, a photocoupler (PC1) for generating an input and output separated control output by the drive transistor, and the photocoupler And a triac (Q1) for switching on by the control output of the power supply and applying power to the bulb. The method of claim 1, wherein the reference voltage generated by the reference voltage pulse generator 36 is a pulse waveform voltage using the time constant by the resistors (R43, R44) and capacitors (C33, C39, C42) Sensor lamp lighting control circuit.