JP2004157102A - Microwave sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small and practical microwave sensor for internal safety usable under any environment. <P>SOLUTION: A microwave sensor module part 10 detects a moving body by a frequency of an emitted microwave within a safety area and an intermediate frequency, and a signal amplifying and gain adjusting part 20 amplifies a very weak signal from the element 10 to gain-adjust an amplified signal, a signal level adjusting part 30 readjusts a gain adjusted signal level from the element 20, a sensitivity level adjusting part 40 adjusts a sensitivity signal level in response to a size of the moving body and a distance therefrom, to be subdivided, and a control part 50 comparison-measures the gain adjusted signal levels from the elements 30,40 with a detection signal from the element 10 using the sensitivity signal level as a reference to control an alarm output, an operation for an alarm and sensitivity signal display. An alarm output part 60, the alarm 70 and a signal display 80 are operated based on a control signal from the element 50, when a moving signal level of the body is a prescribed level or more. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a microwave sensor, and more particularly, to a microwave sensor using the Doppler principle, which can be used in any environment, and which is small and practical. .
[0002]
[Prior art]
Recently, homes and businesses have used various security systems provided by security companies to protect the lives and property of themselves and their families. This is part of measures to prevent crime. In recent years, personal life and apartments, shops, buildings and other widespread individual generation security system, disaster prevention system, common entrance control system, parking management system, home automation system, CCTV monitoring system and other security systems to protect your life. You are trying to secure your property.
[0003]
Such a security system, when an abnormality such as an external intrusion occurs to the customer, confirms this, dispatches the police and its own dispatched vehicle to take measures for emergency situations, controls entry and exit, manages attendance and parking And provide an image of the CCTV installed in the security area. In addition, it is a system that monitors the safety items required for each customer in various types and methods.
[0004]
Infrared systems are widely used for such security systems.
[0005]
The infrared method is a method of detecting when an infrared beam is blocked, and has an advantage that a sensing area is within 10 to 15 m, an automatic alarm function is possible, and operation is possible in all weather.
[0006]
However, the infrared method has the following problems.
[0007]
First, there is the inconvenience that it is difficult to grasp the area where the fault has occurred, and the infrared sensor must be replaced frequently for maintenance.
[0008]
Second, labor and time are wasted due to frequent alarms generated by small animals other than intruders (eg, humans), falling leaves that can block infrared rays, and paper.
[0009]
Third, it only senses the presence or absence of intrusion within the sensing distance, and cannot confirm the size and moving speed of the object, making it difficult to distinguish between objects with intent to intrude and objects without intent to intrude. There are drawbacks.
[0010]
[Problems to be solved by the invention]
Therefore, the present invention is to solve such a problem, and its purpose is to recognize the volume of the intruding object within the sensing distance and to confirm the size and moving speed of the intruding object. Another object of the present invention is to provide a small and practical internal security microwave sensor that can be used in any environment by enabling the object to be classified into an object with no intention of intrusion and an object with no intention to intrude.
[0011]
[Means for Solving the Problems]
To achieve the above object, the present invention is directed to a microwave sensor installed in an area where security is required, which recognizes and senses the volume of an object, and moves according to the frequency and the intermediate frequency of the radiated microwave in the security area. A microwave sensor module unit for sensing an object, a signal amplification and gain adjustment unit for amplifying a weak signal transmitted from the microwave sensor module and adjusting the gain of the amplified signal, and the signal amplification and gain adjustment A signal level adjusting unit for re-adjusting a gain adjustment signal level output from the unit, a sensitivity level adjusting unit for adjusting a sensitivity signal level in accordance with the size and distance of a moving object and subdividing the signal, and the signal level adjusting unit And a microwave sensor based on a gain adjustment signal level and a sensitivity signal level which are subdivided and output from the sensitivity level adjustment unit. A control unit for comparing and measuring the sensing signal of the joule unit and controlling the alarm output, the alarm device operation and the display of the sensitivity signal; and based on the control signal of the control unit, a motion signal level of the object is equal to or higher than a preset sensitivity level. And a microwave detector including an alarm output unit, an alarm device, and a signal indicator that are activated.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a configuration and an operation thereof according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
[0013]
FIG. 1 is a conceptual diagram illustrating a sensing distance and a security area range of a microwave sensor according to the present invention.
[0014]
The microwave sensor according to the present invention is a microwave sensor using the Doppler principle, which is installed in an area where content security is required and recognizes and senses the volume of an object. It is a simple volume monitoring system.
[0015]
Such a microwave detector can recognize the volume of an intruding object within a sensing distance and check the size and moving speed of the intruding object, and can distinguish between an intruding object and an unintruding object. Enable.
[0016]
Also, as shown in FIGS. 1 (a) and 1 (b), the sensing distance can be adjusted from 1 m to 15 m, and a perfect security area having a vertical angle of 40 ° and a horizontal angle of 80 ° is formed to form an internal space. Can be safely protected from intruders.
[0017]
Such a microwave sensor can be easily installed on a desired wall or ceiling by using a bracket attached with the sensor, and by using a joint for connecting the sensor and the bracket. Measure the installation direction and fix.
[0018]
FIG. 2 is a block diagram illustrating a microwave detector according to the present invention.
[0019]
Referring to FIG. 2, the microwave sensor according to the present invention includes a microwave sensor module unit 10, a signal amplification and gain adjustment unit 20, a signal level adjustment unit 30, a sensitivity level adjustment unit 40, a control unit 50, an alarm output unit. 60, an alarm 70, and a signal display 80.
[0020]
The microwave sensor module unit 10 detects a moving object according to the frequency and the intermediate frequency of the radiated microwave in the security area using the Doppler principle.
[0021]
At this time, the microwave frequency and the intermediate frequency use a range of 10.525 GHz, and the sensing distance of the target object is 1 to 15M according to the size and condition of the moving target object.
[0022]
The signal amplification and gain adjustment unit 20 performs a function of amplifying a weak signal transmitted from the microwave sensor module unit 10 and adjusting a gain of the amplified signal, based on a control signal of the control unit 50. Signal amplification and gain adjustment are controlled.
[0023]
The signal level adjustment unit 30 performs a function of readjusting the level of the gain adjustment signal output from the signal amplification and gain adjustment unit 20.
[0024]
The sensitivity level adjuster 40 performs a function of adjusting a sensitivity signal level according to the size and distance of a moving object to subdivide the sensitivity signal.
[0025]
At this time, the adjustment of the sensitivity level is subdivided into one to three stages, and the subdivision of the sensitivity level can be readjusted according to the size and distance of the moving object.
[0026]
The control unit 50 compares and measures the gain adjustment signal level and the sensitivity signal level output from the signal level adjustment unit 30 and the sensitivity level adjustment unit 40 with the sensing signal of the microwave sensor module unit 10 as a reference. It performs the functions of controlling the alarm output, alarm operation and sensitivity signal display.
[0027]
The alarm output unit 60, the alarm 70, and the signal display 80 output an alarm based on the control signal of the control unit 50 if the motion signal level of the object is equal to or higher than a preset sensitivity level, and output an alarm sound. And displays the signal level.
[0028]
The microwave sensor according to the present invention configured as described above receives the signal of the intermediate frequency of the microwave sensor module unit 10 due to the movement of the object, and is adjusted by the signal amplification and gain adjustment unit 20 and the signal level adjustment unit 30. After the signal is adjusted by the sensitivity level adjustment unit 40 and the amplification gain is adjusted by the control unit 50, the signal of the sensor is analyzed. Perform output, alarm activation, and sensitivity signal display.
[0029]
【The invention's effect】
As described above, the microwave sensor according to the present invention can recognize the volume of the intruding object within the sensing distance, check the size and moving speed of the intruding object, and determine the intruding object and the intruding intention. Enables classification from non-existent objects.
[0030]
Also, when an intrusion occurs, the sensor sounds an alarm, and an operator can set a level value at which the alarm sounds. When setting the information level value, small objects that do not intend to invade, such as plants such as fallen leaves, animals such as cats and dogs, are excluded from the alarm, and only large objects such as invading humans are alarmed. You can set a level that sounds like.
[0031]
In addition, since the microwave detector can set the alarm level value, it can prevent the false alarm of the biggest disadvantage of the existing unmanned detector, and by installing it in a place requiring a perfect security area, Can safely protect the property of the internal space from persons.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram showing a sensing distance and a security distance range of a microwave sensor according to the present invention.
FIG. 2 is a block diagram illustrating a microwave detector according to the present invention.
[Explanation of symbols]
Reference Signs List 10 microwave sensor module unit 20 signal amplification and gain adjustment unit 30 signal level adjustment unit 40 sensitivity level adjustment unit 50 control unit 60 alarm output unit 70 alarm device 80 signal display

Claims (3)

In a microwave detector that is installed in an area where security is required and recognizes and senses the volume of an object,
A microwave sensor module unit for sensing a moving object by a frequency and an intermediate frequency of the radiated microwave in the security area;
Amplifying a weak signal transmitted from the microwave sensor module unit, a signal amplification and gain adjustment unit that performs gain adjustment of the amplified signal,
A signal level adjustment unit for re-adjusting the gain adjustment signal level output from the signal amplification and gain adjustment unit,
A sensitivity level adjustment unit that adjusts the sensitivity signal level according to the size and distance of the moving object to subdivide the sensitivity signal level,
The signal level adjustment unit and the sensitivity level adjustment unit are compared with the sensing signal of the microwave sensor module unit based on the gain adjustment signal level and the sensitivity signal level which are subdivided and output, respectively, to output an alarm, an alarm device operation, and the like. A control unit for controlling a sensitivity signal display;
A microwave sensor comprising: an alarm output unit, an alarm device, and a signal display that are activated when a motion signal level of an object is equal to or higher than a predetermined sensitivity level based on a control signal of the control unit. . 2. The microwave sensor according to claim 1, wherein the microwave frequency and the intermediate frequency of the microwave sensor module are 10.525 GHz. The sensitivity level of the sensitivity level adjustment unit may be subdivided into one to three stages, and the subdivision of the sensitivity level may be readjusted according to the size and distance of a moving object. 2. The microwave sensor according to claim 1.

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