KR100646396B1 - Security system using infrared rays - Google Patents

Abstract

A security system using infrared rays is provided to prevent interference between infrared signals of adjacent light transmitting units by generating the infrared signals in different waveforms according to channels. A security system using infrared rays includes a light transmitting unit for generating and radiating infrared rays and a light receiving unit for sensing an invader by using the infrared rays of the light transmitting unit. The light transmitting unit comprises an on-block and an off-block of a predetermined period. In the on-block, the infrared signals including a plurality of square pulses are generated by repeating on-duration and off-duration. The light receiving unit synchronizes the received infrared signals with each channel pattern signal and generates an invasion signal by processing the selected channel pattern signal when the off-time exceeds the predetermined period.

Description

Infrared Sensing Device {Security system using infrared rays}

1 is a view showing an embodiment of an infrared sensing device installation state according to the present invention,

2 is a block diagram showing an embodiment of a configuration of a light transmitting unit of the infrared sensing device shown in FIG.

3 is a block diagram illustrating an embodiment of a light receiving unit of FIG. 1;

4 is a view showing an embodiment of a control panel of the light receiver shown in FIG. 2, and

5 is a view showing an embodiment of a pattern for each channel of the infrared signal according to the present invention.

** Description of symbols for the main parts of the drawing **

100: light transmitting unit 110: driving means

120: light emitting element 130: operation display unit

140: control unit 150: channel selection unit

200: light receiving unit 210: light receiving element

220: amplification unit 230: synchronization processing unit

240: control unit 250: channel selection unit

260: signal processing unit 270: alarm unit

The present invention relates to an infrared sensing device. In particular, when a plurality of infrared sensing devices are installed, infrared signals are transmitted / received in different waveforms according to channels so as not to interfere with each other, and whether the infrared sensing device is blocked by an infrared signal of a set channel. It relates to an infrared sensing device that can be determined.

In recent years, it has been widely used in individual homes, apartments, shopping malls, buildings, and other security systems such as individual household security systems, disaster prevention systems, common entrance access control systems, parking management systems, home automation systems, and CCTV sensors. The property is to be secured.

This security system checks if an abnormality such as an external invasion occurs to the customer and dispatches the police and self-driving vehicle to take an emergency response, control access, manage time and attendance, manage parking, and control the CCTV Provide video. In addition, there are systems that monitor the safety requirements of each customer in a variety of ways and ways.

On the other hand, the infrared detection device is widely used in this security system according to the purpose of use. Infrared sensing devices that function as security equipment by detecting the movement of objects by infrared rays have been proposed in various forms. Infrared detector is composed of one light emitter and one light receiver, and generates an alarm when light is blocked between the light emitter and the light receiver.It is a protection area such as a house, a general building, an office factory, etc. It is installed inside and outside, and it is a device that prevents theft or various accidents by an external intruder by notifying when an unexpected person or item is entered or exited.

The infrared detector is provided with an infrared transmitter and a receiver at both ends of the boundary area, and when two receivers are simultaneously blocked by an intruder while receiving two pulse pulses that emit infrared radiation from the transmitter, the detector detects them with the receiver. It sends an alarm signal to an alarm receiver to generate an alarm sound, so it is a sensing device that informs of an abnormality.

Infrared detection area has a maximum of 300m but generally 60m, 20m products, usually within 10 ~ 15m. Infrared sensors have the advantage of automatic alarming and all-weather operation.

1 is a view showing the installation state of such an infrared sensing device as shown in the section for the security of the plurality of light receiving unit (200a, b, c) and the light transmitting unit (100a, b, c) according to the distance standard of the detection device Install pairs of matches.

As such, when a plurality of light receiving units and a light emitting unit are installed, the light receiving unit 200c receives only the infrared light emitted from the matched light transmitting unit 100c and drives an alarm unit according to the infrared reception state. There was a problem that the infrared light transmitted from the other light transmitting parts (100a, 100b) is received and malfunctions.

In addition, when a plurality of infrared sensing devices, that is, a plurality of light receiving units and a light emitting unit set are installed according to the distance of the boundary region, sequential synchronization is not performed, and thus a false alarm is caused by mutual interference.

Accordingly, the present invention is to solve the above problems, and the light transmitting unit and the light receiving unit of the infrared sensing device transmits and receives an infrared signal of different waveforms according to the channel, and whether or not blocked using the infrared signal of the channel matching the set channel By determining the, it is an object of the present invention to provide an infrared sensing device that can prevent the malfunction occurs by interfering with each other when installing a plurality of infrared sensing devices.

The present invention for achieving the above object, the light emitting unit for generating an infrared ray and radiating to the outside and the light receiving unit for determining whether the intruder intrusion by using the infrared ray projected from the light transmitting portion and projected from the light transmitting portion. In the infrared sensing device consisting of, the light emitting unit is composed of the on section and the off section of the set period and the on section again the on and off duration is repeated to send an infrared signal consisting of a plurality of square wave pulse, Different channel pattern signals are generated according to channels, and the light receiving unit synchronizes the received infrared signal for each channel pattern signal and processes only the selected channel pattern signal to detect an infrared signal generating an intrusion signal when the off time is longer than a set time. Provide the device.

The light transmitting unit includes a control unit for outputting a waveform selection signal according to a channel selection signal of the channel selection unit, the channel selection unit that can be operated by the user; A waveform of a corresponding infrared signal is formed according to the waveform selection signal of the controller, wherein the waveform is formed of an on section and an off section of a set period, and the on section forms a waveform of an infrared signal divided into a predetermined number of square wave pulses. Forming portion; characterized in that it comprises a.

The light receiving unit may include a synchronization processor extracting a synchronization signal from the received infrared signal; A channel selector for outputting a signal for selecting a channel according to a user's operation; By counting the number of pulses in the on period of the synchronization signal applied by the synchronization processing unit to process only the synchronization signal corresponding to the number of pulses corresponding to the channel selected by the channel selector to generate an intrusion signal when the off time lasts more than the set time And a control unit.

The control unit may count pulses using a synchronization signal event counter.

The light receiving unit may generate an error signal when the time intervals of the plurality of square wave pulses are not matched with the time intervals of the pulses of the set channel, or when the warm periods are longer than the duration of the set channel.

There may be a plurality of embodiments of the present invention, hereinafter with reference to the accompanying drawings will be described in detail a preferred embodiment. This embodiment allows for a better understanding of the objects, features and advantages of the present invention.

1 is a view showing an embodiment of the installation state of the infrared sensing device according to the present invention, Figure 2 is a block diagram schematically showing the configuration of the light transmitting unit shown in Figure 1, Figure 3 schematically shows the configuration of the light receiving unit It is a block diagram. 4 is a diagram illustrating an embodiment of a front panel of a light receiver shown in FIG. 3, and FIG. 5 is a diagram illustrating an example of an infrared signal pattern for each channel of the infrared sensing apparatus according to the present invention.

As shown in FIG. 1, the infrared detecting apparatus shown in FIG. 1 is installed in a plurality of pairs in the boundary area, wherein the infrared light transmitting parts 100a, b and c and the light receiving parts 200a, b and c are spaced apart according to a sensing distance standard. do. The light transmitting part 100 and the light receiving part 200 can detect up to a distance of 300 m, but are usually installed in accordance with a setting specification at 60 m or less.

FIG. 2 is a block diagram showing the configuration of the light transmitting part 100 of FIG. 1, and as shown, the light transmitting part 100 includes a driving means 110 for generating infrared rays, a light emitting element 120 for outputting an infrared signal, The operation display unit 140, the channel selector 150, and a control unit 140 for controlling the components.

The light emitting device 120 preferably uses an infrared LED. The driving means 110 is to stably drive by supplying a constant current to the oscillation circuit 111, the waveform forming unit 112 for forming a waveform of the infrared signal, and the light emitting element 120 by turning on the infrared LED when power is input. Infrared LED constant current driving circuit 113 is composed of. The lens assembly for projecting an infrared signal of the infrared LED is installed in front of the light emitting device 120. The operation display unit 140 indicates the light emitting state of the infrared LED.

The channel selector 150 is configured as a channel select button and is installed at one side of the control panel of the light transmitting part 100. The installer or the user can set the channel by operating the button. The button manipulation signal of the channel selector 150 is applied to the controller 140.

The waveform forming unit 113 included in the driving unit 110 forms a waveform of an infrared signal, and is composed of an on section and an off section of a setting period based on the signal applied from the controller 140, and the on section is again. The on duration and off duration are repeated to form a waveform consisting of a plurality of square wave pulses. As shown in FIG. 5, the waveform formed by the waveform forming unit 113 has a period in which an on period and an off period are different according to a channel signal input from the controller 140, and a plurality of square wave pulses constituting the on period are included. The cycles are formed differently.

The controller 140 determines a channel set by a user according to a button manipulation signal applied from the channel selector 150, and applies a waveform selection signal to the waveform forming unit 113 according to the set channel according to the channel. Allows infrared signals of different patterns to be sent.

The light emitting unit 100 includes an operation display unit 130 that emits light when power is input, and the operation display unit 130 blinks at a predetermined interval when the light emitting device 120 and the infrared LED operate normally, indicating a normal operating state. If is input but does not operate normally, the user can confirm that the operation of the light emitting device 120 is not normal by maintaining the LED of the operation display unit 130 is turned on.

The light transmitting part 100 configured as described above is different depending on a channel, and particularly, emits infrared rays of a pulse waveform in which an on-section is divided into a predetermined number of square waves.

3 is a block diagram illustrating the configuration of the light receiving unit 200 of FIG. 1. The light receiving unit 200 for receiving an infrared signal waveform having a period set arbitrarily as shown in the drawing includes a light receiving element 210, an amplifier 220, The alarm unit 270, the synchronization processor 230, the channel selector 250, and the controller 240 are included.

The light receiver 200 uses the infrared signal of the channel selected by the channel selector 250 to determine an intruder's intrusion when the off time of the infrared signal is greater than or equal to a set time, and generates an alarm.

The light receiving element 210 receives an infrared signal incident through the condensing lens and converts the infrared signal into an electrical signal.

The amplifier 220 amplifies and outputs an electrical signal of the light receiving element 210 to a predetermined level to determine whether the light is blocked.

The channel selector 250 is installed at one side of the control panel of the light receiver 200 in the form of a button for channel selection so that the user can operate for channel selection. The channel selection signal of the channel selector 250 is applied to the controller 240.

The synchronization processor 230 synchronizes the pulse amplified by the amplifier 220 for each channel and applies the same to the controller 240.

The controller 240 determines whether an infrared signal corresponds to a channel set according to the signal of the channel selector 250 using a signal applied from the synchronization processor 230, determines whether an intrusion is input, and whether an external signal is input. Determine and output the control signal.

The control unit 240 uses a method of counting and determining the number of ON signals of pulses during a predetermined time as a channel classification method of an input infrared signal, or by measuring a pulse interval. That is, the controller 240 may classify the channel through the number of pulses by counting the number of pulses in the on period of the synchronization signal applied from the synchronization processor 230 using the synchronization signal event counter. In addition, the controller 240 may divide a channel through a time interval between pulses by measuring a time until a pulse is input and a next pulse is input.

If it is determined that the channel of the input pulse does not coincide with the set channel by using the above method, the control unit 240 filters the signal that does not match the channel. When the pulse-off period of the signal in which the channels coincide with each other exceeds the set time, it is determined that the signal is an intrusion and the intrusion detection signal is input to the alarm unit 270.

On the other hand, the control unit 240 measures the duration of the warm zone and if it is longer than the set time is determined as an external signal input to apply an error signal to the alarm unit 270, if the pulse interval does not match the signal of another channel is input It is determined that the error signal is input to the alarm unit 270. The controller 240 is preferably configured of an IC, a microcomputer, or the like.

The alarm unit 270 generates an alarm when an intrusion detection signal of the control unit 240 is applied. The alarm unit 270 generates an alarm when the intrusion detection signal is applied, and outputs an alarm sound when the intrusion detection signal is applied. You can warn of an intrusion. In addition, the alarm unit 270 may notify the intrusion occurs in the security area by applying an intrusion detection signal to the central control unit of the security system. In addition, the alarm unit 270 may output an alarm sound notifying an error state when an error signal is input from the control unit 240 or notify the occurrence of an error to the central control unit of the security system.

On the other hand, Figure 4 is a view showing an embodiment of the light receiving unit control panel 200 'according to the present invention, the control panel has a channel selector 250' on one side so that the user can select a channel from the outside Is formed. The transmitter control panel may also include a switch-type channel selector so that the user matches the channels of the transmitter and the receiver and match the channels of the transmitter and the receiver. Reference numeral 270 'denotes an alarm unit composed of a lamp.

5 is a view showing an embodiment of the infrared waveform according to the channel of the infrared sensing device according to the present invention. Hereinafter, the operation of the infrared sensing device according to the present invention will be described with reference to FIGS.

First, the light receiving unit 200 and the light transmitting unit 100 are installed to face each other in accordance with the sensing distance standard in the boundary region. When the boundary area is large, the plurality of light receiving units and the light transmitting units are installed in a row, and the user manipulates the channel selector 150 formed on the control panel of the light transmitting unit 100 to match the same channel as the matched light receiving unit 150, and the adjacent tattoos. The channel is set to a channel different from the miner 100. As shown in FIG. 1, the light receiving units 200a, b and c and the light transmitting units 100a, b and c are paired and set to the same channel so that the light receiving unit is operated only by the infrared signal of the light transmitting unit where the channels match. That is, in the embodiment shown in FIG. 1, the light receiving unit a 200a is set to the same channel as the light transmitting unit a 100a, the light receiving unit b 200b is the light transmitting unit b 100b, and the light receiving unit c 200c transmits the light. It is set to the same channel as the light portion c (100c). If the channel is spaced more than a predetermined distance there is no signal interference, the light receiving unit 200 and the light emitting unit 100 spaced more than a predetermined distance may be set to the same channel.

When the power supply unit 100 receives power, the channel selection signal of the channel selection unit 150 selected by the user or the installer is applied to the controller 140. The controller 140 applies a waveform signal having a different pattern to the waveform forming unit 113 according to the selected channel. The oscillation circuit of the driving means 110 is driven, and the waveform forming unit 113 forms a pulse pattern according to the signal applied from the controller 240. The light emitting device 120 transmits an infrared signal according to the waveform pattern of the waveform forming unit 113. The waveform is composed of an on period and an off period of a predetermined period, but the on period is divided into a predetermined number of square wave pulses. That is, the light emitting unit 100 generates infrared rays of different waveforms according to channels as shown in FIG. 5, and the infrared signal is repeated in a predetermined period with on and off intervals. It is divided into pulses and sent.

The infrared signal output from the light emitting device 120 is received by the light receiving device 210 of the matched light receiving unit 200. The light receiving element 210 receives the infrared signal and outputs it as an electric signal, and the amplifier 220 amplifies the output signal of the light receiving element 210 and applies it to the synchronization processor 230.

The synchronization processor 230 performs synchronization on the amplified signal for each channel and applies only the signal of the channel corresponding to the channel selection signal of the channel selector 250 to the controller 240.

The control unit 240 counts the input pulses during the set time using the synchronization signal event counter. If the infrared signal as in the embodiment shown in Fig. 5 is 3.2 ms, a "is 2.4 ms, b is 27.2 ms, c 'is 3.6 ms, c" is 4.8 ms, and d is 46.8 ms, Since the channel is counted about 72 times and the channel 2 is counted about 44.6 times, the pulse may be counted to determine the channel. Infrared signals which do not coincide with the number of pulses of the set channel and the number of pulses counted are filtered.

In addition, the controller 240 may determine a channel using the measured time until the pulse is input and the next pulse is input. In the example of FIG. 5, when the measurement time is equal to a, it is determined to be channel 1, and when it is equal to c, it is determined to be channel 2. If the pulse interval does not match that of the set channel, the received infrared signal is filtered.

According to the present invention, since the on-interval is divided into a predetermined number of square waves and inputted, the infrared signal may be divided into channels by a short time count, or the channels may be distinguished by using pulse input time intervals.

The controller 240 determines that an external invasion of the infrared signal of the corresponding channel is longer than a predetermined time, and inputs an intrusion detection signal to the alarm unit 270. Filters by determining that is input.

When an external signal is input or an infrared signal that does not match is input, an error signal may be input to the alarm unit 270 to notify the outside of a malfunction.

In order to prevent interference due to a pulse of the adjacent light emitter 100, the light receiver 200 according to the present invention uses a plurality of signal detection methods. In order to prevent interference, the waveform forming unit 113 of the light transmitting unit 100 may use a method of randomly varying off-times 'b' and 'd'.

Therefore, the infrared sensing device according to the present invention transmits / receives an infrared signal with a different waveform according to a channel so as not to interfere with each other when a plurality of infrared sensing devices are installed, and counts the number of pulses of which the light receiving unit is divided into a predetermined number, or pulses. The channel is easily determined by measuring the time interval of the sensor, and only the infrared signal corresponding to the set channel is detected to detect the blocking. Therefore, malfunction due to the infrared signal of the adjacent light transmitting part 100 can be prevented.

As described in detail above, when the plurality of light transmitting parts and the light receiving parts are aligned, mutual interference by the infrared signals of the adjacent light transmitting parts may be prevented by differently providing infrared signals having different waveforms according to channels.

In addition, the infrared signal provided by the light transmitting unit according to the present invention repeats the on / off section of a predetermined period, the on section is divided into a predetermined number of square wave pulses to count the pulse for a short interval of the set time without error channel By determining whether to cut off only by the infrared signal corresponding to the channel, malfunction can be prevented.

Claims (5)

In the infrared sensing device consisting of a light emitting unit for generating infrared rays to emit to the outside and spaced apart from the light transmitting unit, and a light receiving unit for determining whether the intruder intrusion using the infrared light projected from the light transmitting unit, The light emitting unit is composed of an on section and an off section of a set period, and the on section again transmits an infrared signal consisting of a plurality of square wave pulses by repeating the on duration and the off duration again, and different channel pattern signals according to the set channel. Occurs, And the light receiving unit synchronizes the received infrared signal for each channel pattern signal and processes only the selected channel pattern signal to generate an intrusion signal when the off time is longer than a set time. The method of claim 1, The light transmitting unit, It is provided with a channel selection unit that can be operated by the user, A controller for outputting a waveform selection signal according to the channel selection signal of the channel selection unit; A waveform of a corresponding infrared signal is formed according to the waveform selection signal of the controller, wherein the waveform is formed of an on section and an off section of a set period, and the on section forms a waveform of an infrared signal divided into a predetermined number of square wave pulses. Infrared sensing apparatus comprising a; forming unit. The method according to claim 1 or 2, The light receiving unit, A synchronization processor extracting a synchronization signal from the received infrared signal; A channel selector for outputting a signal for selecting a channel according to a user's operation; By counting the number of pulses in the on period of the synchronization signal applied by the synchronization processing unit to process only the synchronization signal corresponding to the number of pulses corresponding to the channel selected by the channel selector to generate an intrusion signal when the off time lasts more than the set time Infrared sensing apparatus comprising a; control unit. The method of claim 3, wherein The control unit, the infrared sensing device, characterized in that to count the pulse using the synchronization signal event counter. The method according to any one of claims 1 to 4, The light receiving unit, And detecting the time intervals of the plurality of square wave pulses and generating an error signal when the time intervals of the plurality of square wave pulses do not coincide with the time intervals of the set channel, or when the on period is longer than the set period of the set channel.

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