KR100715782B1 - Infrared sensor - Google Patents

Abstract

The present invention relates to an infrared ray detecting apparatus, and more particularly, to an infrared ray detecting apparatus which includes a transparent display unit for projecting an infrared beam and an alignment display unit for displaying an alignment state of a light receiving unit for detecting infrared rays, The operator can quickly and easily set the transparent portion and the light receiving portion while confirming the alignment state of the transparent portion and the light receiving portion through the alignment display portion.

Infrared, Sensors, Alignment, LED

Description

[0001] The present invention relates to a security system using infrared rays,

1 is a view showing an embodiment of a state of installing an infrared ray detecting device according to the present invention,

FIG. 2 is a block diagram showing an embodiment of a light receiving section of the infrared ray detecting apparatus shown in FIG. 1. FIG.

FIG. 3 is a block diagram illustrating an embodiment of the light projecting portion of FIG. 1,

FIG. 4 is a view showing an embodiment of the light-receiving portion label shown in FIG. 2. FIG.

DESCRIPTION OF REFERENCE NUMERALS

100: transparent portion 110: driving means

120: light emitting element 130:

140: operation indicator 200:

210: receiving optical system 220: receiving element

231: amplification unit 232: automatic gain adjustment unit

233: alignment display section 240: signal processing section

250: Response speed control unit 260: Relay contact output unit

270: Warning part 280: Stabilization part

The present invention relates to an infrared ray detecting apparatus, and more particularly, to an infrared ray detecting apparatus capable of quickly and easily setting a light transmitting unit and a light receiving unit by using a transparent display unit for projecting an infrared ray beam and an alignment display unit for indicating an alignment state of a light receiving unit for detecting infrared rays To an infrared sensing device.

Recently, it has been widely used in private houses, apartment buildings, shopping malls, and buildings, and it has been widely used in security systems such as individual generation security system, disaster prevention system, common entrance access system, parking management system, home automation system, And to secure the safety of property.

Such a security system is designed to monitor the customer when an external intrusion or the like occurs and to dispatch the police and self-dispatching vehicle to take emergency measures, to control the access, to control the attendance, to manage the parking, Provide images. In addition, there are systems to monitor the safety requirements of each customer in various types and ways.

On the other hand, an infrared ray detection device is widely used in such a security system depending on the purpose of use. Infrared sensing devices that detect the movement of objects by infrared rays and function as security devices have been proposed in various forms. Infrared detection device is a device that generates a warning when the transparent part and the light receiving part are composed of one set and shielded between the transparent part and the light receiving part. It protects the house, general building and office factory for the purpose of theft prevention and access control. It is installed inside and outside the area. It is a device to prevent theft or various accidents caused by external intruders by informing them of the entrance and exit of unexpected persons or goods.

The infrared ray detecting apparatus includes an infrared ray transmitting unit and a light receiving unit at both ends of a boundary area, and when two beams are simultaneously blocked by a medium intruder receiving two pulse beams emitted from the light transmitting unit by the light receiving unit, And generates an alarm sound by sending an alarm signal to an alarm receiver or the like, thereby detecting an abnormality.

The detection area of infrared rays is up to 300m, but it is usually 60m, 20m, and it is usually within 10 ~ 15m. The infrared sensing device has the advantage of enabling automatic alarm function and operation after all.

In the meantime, when the infrared ray sensing apparatus is released, the light emitting / receiving element composed of the lens and the transistor or the infrared LED is fixed in the case of the light transmitting portion or the light receiving portion when the distance of the lens is not correct, If the axes do not coincide with each other, accurate detection can not be performed, which causes a false alarm.

Further, there is a great difficulty in aligning the infrared ray beam axis by aligning the light receiving portion and the light transmitting portion, which are spaced apart from each other at a considerable interval, when the infrared ray detecting device is installed. That is, conventionally, since alignment of the light-projecting unit and the light-receiving unit is required to be performed by turning on the light-projecting unit and checking the output voltage of the light-receiving device with a tester, it is difficult to precisely set the position for irradiating or receiving the infrared light. There was a problem.

In other words, conventionally, in order to check the output voltage of the automatic gain control unit at the time of installation work, the operator must contact the tester terminal with the automatic gain control terminal of the light receiving unit, check the output, and the other operator at the transparent unit must adjust the transmission optical axis, It took a lot of manpower and time for the city, and the accuracy of the work also deteriorated.

In addition, the same problem occurred during maintenance after installation of the equipment, which was very inconvenient.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide an alignment display unit which emits light of different colors according to an output voltage of a light receiving element set in an infrared ray detecting apparatus, So that it is simple and easy to install.

According to an aspect of the present invention, there is provided an infrared ray detector comprising: a transparent portion for generating infrared rays to be emitted to the outside; and a light receiving portion for detecting whether an intruder intrudes by using infrared rays projected from the transparent portion, Wherein the light receiving unit comprises: a light receiving element for receiving the infrared ray and converting the received infrared ray into an electric signal; An amplifying unit amplifying an electric signal output from the light receiving element; An automatic gain adjusting unit connected to the amplifying unit and adjusting a gain according to an electric signal inputted from the light receiving device; And an infrared ray receiving amount of the light receiving element necessary for operation of the infrared ray detecting device is set as a set receiving light value and the infrared ray receiving amount detected through the light receiving element is compared with the set receiving light value to indicate the infrared ray receiving state of the light receiving element The light receiving unit and the light transmitting unit are in an inadequate alignment state when the output voltage of the automatic gain adjusting unit is less than a set voltage, And an alignment display unit for displaying the alignment information.

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Preferably, the status display of the alignment display unit is formed of LEDs emitting light of two or more colors.

The LED is turned on in red when the light receiving unit and the translucent unit are in an alignment state in which the infrared ray beam axis is inadequate, and when the light receiving unit and the translucent unit show an alignment state in which the infrared ray beam axis is in a proper alignment state, It is preferable that it is lit in green.

Meanwhile, the alignment display unit may include an acoustic output unit, and may output sound indicating the alignment state of the light-receiving unit and the light-transmitting unit according to an output voltage of the automatic gain adjusting unit.

The embodiments of the present invention will be described in detail with reference to the accompanying drawings. And the objects, features and advantages of the present invention can be better understood through the embodiments.

FIG. 1 is an embodiment according to the present invention. As shown in FIG. 1, the infrared ray detecting apparatus is installed at both ends of a boundary region with a predetermined distance between the infrared ray transmitting unit 100 and the light receiving unit 200. The light projecting unit 100 and the light receiving unit 200 can be sensed even when they are spaced at a maximum distance of 300 m, but they are installed according to the set standard at a distance of 60 m or less.

2, the transparent portion 100 includes a driving means 110 for generating infrared rays, a light emitting means 120 for outputting an infrared ray, , A projection optical system 130, and an operation display lamp 140.

Preferably, the light emitting means 120 uses an infrared LED. When the power source is turned on, the driving means 110 turns on the infrared LED. The driving means 110 includes an oscillation circuit 111, a waveform shaping 112 for forming an infrared waveform, And an infrared LED constant current drive circuit 113 for driving the LED 120. The projection optical system 130 is constituted by a lens assembly for projecting an infrared beam of an infrared LED. The operation indicator 140 indicates the light emitting state of the infrared LED.

3, the light receiving unit 200 includes a light receiving optical system 210, a light receiving element 220 for converting the detected infrared beams into an electrical signal, An amplification section 231 for amplifying the output of the light receiving elements 220, an automatic gain adjusting section 232 for adjusting the amplification factor of the amplification section 231, and an output signal of the light receiving means 220, A signal processing unit 240 for monitoring the presence or absence of interruption of the infrared rays and generating an anomaly detection signal when continuous infrared beams are blocked, an alarm unit 270 for alarming an external intrusion upon receiving an anomaly detection signal, a light receiving unit 200, And an alignment display section 233 for indicating an alignment state of the display device.

The light receiving optical system 210 collects infrared rays using a condenser lens to transmit and receive infrared rays more widely as an infrared condenser. The light receiving optical system 210 preferably has the filter characteristics of the cover so that all light other than 0.9 m transmitted through the device is disturbance light, so that light of 0.8 m or less is removed.

The light receiving element 220 receives the infrared beam incident through the light receiving optical system 210 and is preferably formed of a phototransistor. The light receiving element 220 receives an infrared beam and outputs an electric signal.

The amplifying unit 231 amplifies the electric signal of the light receiving element 220 to a predetermined level magnitude for judging whether or not the light is shielded, and outputs the amplified electric signal. The automatic gain adjusting unit 232 (Auto Gain Control) (Gain) of the input voltage with respect to the output voltage of the amplifying section 231 by the strength of the signal. By adjusting the gain by the size of the internal noise, if the internal noise is large, the amplification factor of the amplification section 231 is reduced to make the signal clearer. If the signal attenuation is large and the noise is small, Make it clear. Therefore, when the environmental condition at the time of actual installation is summer, the sunlight is strong, and when the density is high, the internal noise becomes large. However, the gain is made small by the automatic gain adjusting unit 232 to make the signal clearer. On the contrary, And the frosty day, the signal attenuation is large and the noise is small, but the gain is increased by the automatic gain adjusting unit 232, so that the small signal becomes larger and clearer. The automatic gain adjusting unit 232 detects the output signal of the amplifying unit 231 that amplifies and outputs the electric signal of the light receiving element 220 and adjusts the gain by using the detected output signal. Therefore, the automatic gain adjusting unit 232 uses the voltage applied to the automatic gain adjusting unit 232 So that the light receiving value of the infrared beam projected from the light emitting element 120 can be known.

The signal processing unit 240 applies a detection signal to the warning unit 270 when it is determined that the infrared beam is blocked by the external intruder using the detection signal of the light receiving element 220. The determination of the occurrence of the abnormality can be made using the response speed control unit 250 and the relay contact output unit 260 to distinguish an intruder from a small animal or a tree branch. The response speed adjuster 250 adjusts the response speed so that the intruder can be detected and the response speed can be adjusted so that small animals are not detected. The relay contact output unit 260 includes a pair of the light receiving element 220 and the light emitting element 120 in pairs and outputs a detection signal to the warning unit 270 only when a plurality of elements are simultaneously blocked by the AND circuit method This prevents the alarm of the detection device from ringing by the branches or small animals.

The alarm unit 270 generates an alarm when a signal is applied from the signal detection unit 240 and the relay contact output unit 260 through the response speed control unit 250. The alarm unit 270 includes an acoustic output speaker, When a signal is applied, an alarm sound is output, or a warning light or an LED is configured to warn that an intrusion has occurred by flashing or emitting light. In addition, the alarm unit may inform the central control unit of the security system that an intrusion has occurred in the security zone by applying an intrusion detection signal.

The disturbance light compensating unit 221 further includes a disturbance light compensating unit 221 for discriminating and absorbing only a strong direct current wave so that the light receiving element 220 constituted by a phototransistor is always in a photoelectric conversion capacity since the strong disturbance light is DC light. It is desirable to prevent interference by a strong infrared source.

In addition, with respect to such electrical noise such as noise caused by an electric device causing an abnormal operation and electric shock from a radio device or a dielectric damaging the device itself, a stabilizing portion 280 composed of a noise removing filter is provided in the input / So that electrical noise can be processed.

Meanwhile, in the automatic gain adjusting unit 232 according to the present invention, an alignment display unit 233 composed of a red-green LED is provided to emit light of different colors according to the voltage of the automatic gain adjusting unit 232, . When the voltage of the automatic gain adjustment unit 232 is less than 4.3V, the alignment display unit 233 formed of the red-green LED is turned on in red. When the voltage is 4.3V or more, the LED is turned on in green.

That is, when the alignment display unit 233 emits green light, the automatic gain adjusting unit voltage is 4.3 V or more. Therefore, when the light projecting unit 100 and the light receiving unit 200 are installed, the positions of the light projecting unit 100 and the light receiving unit 200, It can be seen that the infrared ray beam axis is not properly set.

If the alignment display unit 233 emits red light, the automatic gain adjusting unit voltage is less than 4.3 V, so that the infrared beam shafts of the light projecting unit 100 and the light receiving unit 200 are distorted.

Therefore, in the infrared sensor according to the present invention, when the alignment display unit 233 composed of a red LED is connected to the automatic gain adjusting unit 232 and the voltage of the automatic gain adjusting unit 232 is 4.3V or more, Since it is known that the alignment of the beam axis does not occur properly, it is not necessary to measure the received signal by using a tester for alignment at the time of installation of the light projecting unit 100 and the light receiving unit 200, 100 and the light receiving unit 200 can be installed.

That is, in order to align the light-transmitting unit and the light-receiving unit when the conventional infrared sensor is installed, the tester is contacted to the terminal of the automatic gain adjusting unit to measure the voltage of the automatic gain adjusting unit to check whether the alignment is performed. Can confirm the output by using LED. Therefore, it is possible to know the setting condition of the product by the LED color even if the operator does not have a tester.

On the other hand, the light receiving unit 200 includes a protective cover, and when the LED of the alignment display unit 232 installed in the protective cover is always lit, the temperature difference between the inside and the outside of the case may be generated and dew may be formed inside the cover. (233) LED is turned off. That is, since the alignment display unit 233 is used only when setting the light-transmitting unit and the light-receiving unit, the LED is turned off when the cover is closed so that dew is formed inside the cover, thereby preventing errors in the sensing operation.

FIG. 4 is a view showing an embodiment of a light receiving unit cover label 200 'of the infrared ray detecting apparatus constructed as described above, and an embodiment of the installation process will be described with reference to FIG. 2 to FIG. Reference numeral 233 'in FIG. 4 denotes an alignment display unit and a red-green LED, and the color reference of the LED corresponding to the voltage is specified. Reference numeral 270 denotes a warning unit 270, which may be a warning lamp and / or a speaker. Reference numeral 250 denotes a response speed control unit, which allows the operator to set the response speed according to the environment. 232 "and 232 " may measure the voltage of the automatic gain adjusting unit 232 by contacting the tester with a terminal, for example, when driving confirmation or manual installation of the LED is required as both terminals of the automatic gain adjusting unit 232.

First, the transparent portion 100 and the light receiving portion 200 are installed at both ends of the protection zone according to the distance standard. When the power is applied after the installation, the driving means 110 of the light projecting unit 100 is driven to emit light from the light emitting device 120 and the infrared LED, and the infrared rays are projected through the projection optical system 130.

The infrared beam projected from the transparent portion 100 is incident through the light receiving optical system 210 of the light receiving portion 100 and the photodetector of the light receiving element 220 is excited in accordance with the incident infrared beam to output a signal. The sensing signal of the light receiving element 220 is amplified by the amplifying unit 231 and the automatic gain adjusting unit 232 adjusts the amplification factor of the amplifying unit 231 according to the sensing signal.

The alignment display section 233 indicates the alignment state of the light receiving section 200 and the light projecting section 100 according to the voltage of the automatic gain adjusting section 232. [ The incident amount of the infrared beam incident on the light receiving unit 200 becomes maximum when the beam axes coincide with each other and the incident amount is small when the height and direction do not match each other. Accordingly, the alignment display unit 233 composed of the red-green LED 233 'connected to the automatic gain adjusting unit 232 is turned on according to the amount of infrared rays incident on the light- The color of the LED 233 'of the alignment display portion 233 changes according to the voltage of the automatic gain adjusting portion 232 to notify the operator of the alignment state of the light receiving portion 100 and the transparent portion 200. [

When the light receiving unit 200 and the light projecting unit 100 are not aligned and the infrared beam axis is rotated, the received light amount of the infrared beam is small and the voltage of the automatic gain adjusting unit becomes less than the set voltage. That is, when the Max voltage of the automatic gain adjusting unit 232 is 5.2 V, the LED 233 'of the alignment display unit 233 lights up in red when the voltage is less than 4.3 V.

When the light receiving unit 200 and the light projecting unit 100 are aligned and the infrared ray beam axis of the light receiving unit matches the infrared ray beam axis of the light transmitting unit, the voltage of the automatic gain adjusting unit 232 becomes the set voltage of 4.3V or higher and the LED 233 ' Is emitted in green.

Accordingly, when the LED of the alignment display unit 233 is lit in green when the light receiving unit 200 and the light projecting unit 100 are aligned, the operator can easily confirm the alignment through the light.

In other words, if you want to set the setting voltage by yourself or two at the time of installation work, you have to go to the terminal 232 ', 232 "of the automatic gain control part several times to make sure that the setting is done even if the distance is between 3m and 5m However, the infrared sensor according to the present invention can perform the alignment only by checking the color of the LED.

On the other hand, if the alignment display unit 233 is replaced with a speaker or an audio output device is installed in parallel to output the sound set in accordance with the voltage of the automatic gain adjusting unit 232, the buzzer sounds when the setting is inappropriate, And whether it is set with LED or sound alone. In the case of using an audio output device, if a pair of light receiving unit and light transmitting unit is installed and one of the pair is not set, or if a product is defective, the cover is opened and checked to find a problematic infrared detecting device The infrared ray detecting apparatus according to the present invention can easily know the position of the infrared ray detecting apparatus in which the problem occurs only by the sound without opening the cover.

As described above, since the output voltage of the automatic gain controller can be leveled and the setting state can be known without using the tester, the setting accuracy can be improved, the setting can be facilitated, and the setting time can be saved.

As described above in detail, according to the present invention, since the alignment display unit is connected to the automatic gain adjusting unit and the voltage of the automatic gain adjusting unit is leveled, the setting state and the alignment state can be known through the alignment display unit without using the tester, So that the installation and maintenance cost of the infrared sensing device can be drastically reduced.

Claims (6)

delete delete And a light receiving unit installed opposite to the light projecting unit and configured to determine whether an intruder intrudes using infrared rays projected from the light projecting unit, The light- A light receiving element for receiving the infrared ray and converting it into an electric signal; An amplifying unit amplifying an electric signal output from the light receiving element; An automatic gain adjusting unit connected to the amplifying unit and adjusting a gain according to an electric signal inputted from the light receiving device; And The infrared ray receiving amount of the light receiving element necessary for the operation of the infrared ray detecting device is set as a set receiving light value and the infrared ray receiving amount detected through the light receiving element is compared with the set receiving light value to indicate the infrared ray receiving state of the light receiving element And an alignment state of the infrared ray beam axis of the light receiving unit and the light transmitting unit is in an inadequate state when the output voltage of the automatic gain adjusting unit is less than a set voltage, And an alignment display unit. The method of claim 3, Wherein the state display of the alignment display unit comprises LEDs emitting light in two or more colors. 5. The method of claim 4, The LED is a red-green LED, When the light-receiving portion and the light-transmitting portion exhibit an alignment state in which the infrared beam axis is inadequate, the LED lights up in red, Wherein the LED is illuminated in green when the light receiving unit and the light transmitting unit show an alignment state of the infrared beam axis. The method of claim 3, Wherein the alignment display unit is configured as an acoustic output unit and outputs sound indicating the alignment state of the light receiving unit and the light transmitting unit according to the output voltage of the automatic gain adjusting unit.

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