KR20090028912A - Device for error detection of sensing assembly using infrared rays and method thereof - Google Patents

Abstract

A detecting device of an infrared ray sensor detecting a sense line state connecting the flood light and a light receiving device more than two are provided to increase the convenience and reliability of repair restoration by displaying the abnormal of a sense line. A detecting device of an infrared ray sensor includes a plurality of light receiving sensors(21A ~ 21N), amplifiers(22A ~ 22N), voltage converters(23A ~ 23N), a controller(24) and indication lamps(25A ~ 25N). A plurality of light receiving sensors receives the infra-red signal radiated to the frequency band which is independent from the light-transmission sensor. The received signal separates frequency and extracts only the pure infra-red signal. The voltage converter converts the frequency of the amplified infra-red signal into voltage. The controller compares reference voltage set in the sense line and voltage applied from the voltage converter.

Description

Device for error detection of sensing assembly using infrared rays and method

The present invention relates to an infrared detector composed of a light emitting device and a light receiving device, and more particularly, an abnormality detection of an infrared light detector for diagnosing a state of at least two detection lines connecting the light emitting device and the light receiving device and indicating a result thereof. An apparatus and method are provided.

Recently, homes and companies have installed and used unmanned security and access control systems provided by security companies in order to prevent the occurrence of various crimes and to protect lives and property.

The unmanned security guard and access control system is equipped with a variety of sensors for detecting the intrusion of outsiders at a predetermined position in the surveillance area, the signal of each sensor is comprehensively detected by the subscriber device or sensing device installed in the surveillance area, The signal detected by the sensing device is transmitted to a central control device installed remotely through a dedicated line or a public communication network.

Thus, the central control device detects whether an intruder has occurred in the surveillance area and provides a quick response accordingly, thereby protecting valuable lives and property in the surveillance area.

In general, infrared sensors are widely used as sensors applied to such unmanned security and access control systems.

Infrared detector consists of a light emitting device and a light receiving device, and is installed so as to face each other optically in the monitoring area such as a window, a wall, and an exhibition space.

The light emitting device generates an infrared signal of the set frequency band and emits it to the light receiving device side, and the light receiving device analyzes the received light amount of the infrared signal emitted from the light emitting device, and blocks the light by an intruder or any object between the light emitting device and the light receiving device. It is determined whether or not this has occurred, and if it is determined that shading has occurred, it generates a set alarm.

The light transmitting device and the light receiving device corresponding thereto include at least two or more, typically 2, 4, 6, 8... Two sensors consisting of two multiples are formed to form a sensing line, and each sensor transmits and receives an infrared signal of an independent frequency band.

As described above, an infrared detector forming at least two detection lines typically sets two detection lines into one group and sets one group to prevent false detection caused by shading by animals or leaves. Only when shading of all the sensing lines is detected, it is determined that an intruder has occurred, and an alarm is generated.

Conventional infrared detectors monitor at least two or more detection lines formed between the light emitting device and the light receiving device, and a failure of the light transmitting sensor that emits infrared signals or the light receiving sensor that receives the emitted infrared signals, the angle of the sensing line, etc. There is no means for diagnosing this.

Accordingly, even when the light blocking sensor is detected due to a failure of the light transmitting sensor or the light receiving sensor, or the transmission / reception angle is distorted, there is a problem of generating a false alarm by determining that the light is blocked by an intruder.

In addition, when an error occurs in any one or more detection lines formed between the light emitting device and the light receiving device, a means for indicating which error occurs in the detection line is not provided, which causes a lot of difficulty in repairing and repairing the detection line. There is a problem.

The present invention has been invented to solve the above problems, the object of which is to diagnose the status of each sensing line connecting the light emitting device and the light receiving device to indicate the result.

The present invention is equipped with a display means for indicating whether the detection line is abnormal in the vicinity of each light receiving sensor so that the detection line in which the abnormality occurs can be quickly identified.

An infrared detector abnormality detection device according to a feature of the present invention for realizing the above object in the infrared detector consisting of a light transmitting device and a light receiving device,

A plurality of light receiving sensors installed corresponding to the light transmitting sensors installed in the light emitting device, and receiving infrared signals of independent frequency bands emitted by each light transmitting sensor to extract only infrared signals; An amplifier for compensating the signal by amplifying the infrared signal extracted from the light receiving sensor to a set level; A voltage converter converting the frequency of the amplified infrared signal into a voltage; A controller for diagnosing an abnormality of the sensing line by comparing the voltage applied from the voltage converter with a reference voltage set in each sensing line; It is installed in a predetermined position around the light receiving sensor, it is on and off in accordance with the control signal applied from the control unit includes an indicator lamp for indicating whether or not the corresponding detection line.

In addition, the abnormality detection method of the infrared detector according to the feature of the present invention, in the infrared detection method of the infrared detector consisting of a light transmitting device and a light receiving device and having a plurality of sensing lines,

Receiving and extracting an infrared signal from each of the plurality of sensing lines and converting the infrared signal into a voltage value; Comparing the voltage value of each sensing line with a reference voltage value set in the corresponding sensing line; Determining that the voltage is detected in the sensing line as a result of the comparison in a normal operation value and determining that the voltage value is not in the range of the reference voltage value; If the voltage value of the detection line determined to be abnormal does not fall within the range of the reference voltage value for a predetermined time or more and includes the process of instructing the diagnosis result by turning on or off the indicating lamp by determining that the detection line is faulty. do.

By the above-described configuration, the present invention can be expected to have an effect of providing convenience and reliability in repair and repair by diagnosing and displaying an abnormality of the monitoring line during the installation or operation of the infrared detector.

In addition, the use of the infrared detector can be expected to maintain the more stable sensing line to provide the effect of providing reliability.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In the drawings, parts irrelevant to the description are omitted for simplicity of explanation, and like reference numerals designate like parts throughout the specification.

1 is a configuration diagram schematically showing an abnormality detection device of the infrared detector according to an embodiment of the present invention.

The present invention is provided in the light receiving device 20, and includes a plurality of light receiving sensors 21A-21N, amplifiers 22A-22N, voltage converters 23A-23N, control unit 24, and indicator lamps 25A-25N. It consists of.

The plurality of light receiving sensors 21A-21N receive infrared signals emitted in independent frequency bands from a light transmitting sensor provided to correspond to a light emitting device (not shown), and are included in the received signals to separate frequencies of unnecessary bands such as visible light. To extract only pure infrared signals.

The amplifiers 22A-22N amplify the infrared signals extracted from the respective light receiving sensors 21A-21N to a set level to compensate for the signals.

The voltage converters 23A-23N convert the frequency of the amplified infrared signal into a voltage and apply it to the controller 24.

The controller 24 compares the voltage applied by each of the voltage converters 23A to 23N with a reference voltage set for each set sensing line to diagnose whether the sensing line is abnormal.

That is, if a voltage is not included in the range of the reference voltage set due to the light emission sensor, the light reception sensor, or the detection line is misaligned, the diagnosis is made as an error of the corresponding detection line.

The indicator lamps 25A-25N are installed at predetermined positions around each of the light receiving sensors 21A-21N. The indicator lamps 25A-25N are turned on and off according to the control signal applied from the control unit 24 to indicate whether the corresponding sensing line is abnormal. give.

The operation of the present invention including the function as described above will be described with reference to FIGS. 2 and 3 as follows.

When the infrared detector installed in a specific monitoring area 30 such as a window, a wall, or an exhibition space is operated, the plurality of light receiving sensors 21A-21N provided in the light receiving device 20 are respectively installed to correspond to the light emitting device 10. Receiving an infrared signal emitted from the floodlight sensor of the separation of unnecessary frequency bands such as visible light and then extracts only the frequency of the pure infrared signal (S101).

Thereafter, the infrared signals extracted from each of the light receiving sensors 21A-21N are amplified and compensated to a predetermined level set by the amplifiers 22A-22N, and then applied to the voltage converters 23A-23N.

The voltage converters 23A-23N convert the frequency of the infrared signal applied from the amplifiers 22A-22N into voltages and then apply them to the control unit 24 (S102).

The controller 24 compares the voltage applied in each sensing line with the reference voltage set in the corresponding sensing line (S103) to determine whether the voltage of the detected infrared signal is within the normal range, preferably in the range of 3 to 5V. (S104).

When the detection voltage of the sensing line is included in the normal range in the determination of S104, it is determined that the transmission and reception of the infrared signal in the corresponding sensing line are normally performed, and the indication lamp 25A-25N installed around the light receiving sensor of the corresponding sensing line. Instructed via (S105).

Instructions through the indicator lamps 25A-25N are turned on or off. In general, when the detection lines are normal, the indicator lamps 25A-25N of the corresponding detection lines are turned on.

However, if the voltage detected in the specific sensing line is not included in the normal range in the determination of S104, for example, when a voltage of 0 to 2.9 V is detected, it is determined that an abnormality occurs in the corresponding sensing line (S106). .

Thereafter, the elapsed time for detecting the abnormality of the sensing line is counted (S107) to determine whether a predetermined time set as a criterion for failure determination has elapsed (S108).

In general, when shading occurs in the sensing line by an intruder, the shading is restored to a normal state after shading, but in the case of a failure of the sensing line, it is not normally restored but maintains a continuous blocking state.

Therefore, when the counter of the elapsed time has elapsed for a predetermined time or more as set as a criterion for the failure determination, the controller 24 determines that a failure occurs in the light transmitting sensor or the light receiving sensor in the corresponding sensing line or the angle of the sensing line is misaligned.

Accordingly, the indicator lamps 25A-25N installed around the light receiving sensor of the corresponding detection line are turned on or off according to the set indication method to indicate an abnormality of the corresponding detection line (S109) (S110).

For example, when it is determined that an abnormality has occurred in the first sensing line, the light transmitting sensor or the light receiving unit constituting the first sensing line is turned on or off by turning on or turning off the first indicating lamp 25A provided around the first receiving sensor 21A. It indicates that the sensor has a failure or the angle of the sensing line is wrong, so that the transmission and reception of infrared signals is not normal.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It is included in the scope of rights.

1 is a view schematically showing an abnormality detection device of the infrared detector according to an embodiment of the present invention.

2 is a flowchart of detecting an abnormality of a sensing line in an infrared detector according to an exemplary embodiment of the present invention.

3 is a view showing an installation state of the infrared detector according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: light emitting device 20: light receiving device

20A-20N: Receiver Sensor 21A-21N: Amplifier

22A-22N: Voltage Converter 23: Control Unit

25A -25N: Indicator Lamp

Claims (5)

In the infrared sensor consisting of a light projector and a light receiver, A plurality of light receiving sensors (21A-21N) installed corresponding to the light emitting sensors installed in the light emitting device to receive infrared signals of independent frequency bands emitted by each light transmitting sensor and extract only infrared signals; An amplifier (22A-22N) for amplifying the infrared signal extracted by the light receiving sensors (21A-21N) to a set level to compensate for the signal; Voltage converters 23A-23N for converting a frequency of the amplified infrared signal into voltage; A control unit 24 for diagnosing an abnormality of the sensing line by comparing the voltage applied from the voltage converters 23A to 23N with a reference voltage set in each sensing line; Installed in a predetermined position around the light receiving sensors 21A-21N, and turned on and off according to a control signal applied from the control unit 24 to indicate an indication lamp 25A-25N indicating whether a corresponding sensing line is abnormal. Abnormal detection device of the infrared sensor included. The method of claim 1, The control unit 24 does not include the voltage detected in the sensing line connecting the light emitting device 10 and the light receiving device 20 to the range of the reference voltage set in the corresponding sensing line, and when the predetermined time is maintained for a predetermined time or more, An abnormality detection device of the infrared detector that indicates the state through an indicator lamp that determines that an error has occurred in the line. The method of claim 1, The reference voltage set in the control unit 24 is an abnormality detection device of the infrared detector is set in the range of 3 ~ 5V. In the abnormal detection method of the infrared detector consisting of a light emitting device and a light receiving device, and having a plurality of sensing lines, Receiving and extracting an infrared signal from each of the plurality of sensing lines and converting the infrared signal into a voltage value; Comparing the voltage value of each sensing line with a reference voltage value set in the corresponding sensing line; Determining that the voltage is detected in the sensing line as a result of the comparison in a normal operation value and determining that the voltage value is not in the range of the reference voltage value; If the voltage value of the detection line determined to be abnormal does not fall within the range of the reference voltage value for a predetermined time or more and includes the process of instructing the diagnosis result by turning on or off the indicating lamp by determining that the detection line is faulty. Abnormality detection method of infrared sensor. The method of claim 4, wherein The abnormality of the detection line is a failure detection method of the infrared detector including a failure of the light transmitting sensor, a failure of the light receiving sensor, the angle of the detection line angle of the light transmitting sensor and the light receiving sensor.

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